Technical field [0001] 　The present invention relates to an ink supply system including an ink supply reservoir and such ink supply container for replenishing ink to the ink tank for storing ink to be supplied into the recording apparatus. BACKGROUND [0002] 　Conventionally, in a recording apparatus for recording by ejecting ink onto the medium, the ink tank storing the ink therein is connected in a state capable of supplying ink. When the remaining amount of ink in the ink tank in such a recording apparatus becomes little, the ink is replenished with ink supply container from the outside to such an ink tank (for example, Patent Document 1) . CITATION Patent Document [0003] Patent Document 1: JP 2001-146021 JP Summary of the Invention Problems that the Invention is to Solve [0004] 　Incidentally, supplying work of the ink to the ink tank, where it is necessary to perform properly while suppressing the supply failure of the ink, such supplying work was done by the user of the recording apparatus from the prior art. Therefore, in order to supply work such ink is suitably performed by the user, for example, further improvement in the ink supply container or the like has been demanded. [0005] 　The present invention has been made in view of these circumstances, and its object is to provide an ink supply system including an ink supply reservoir and such ink supply container can be properly replenish ink to the ink tank is there. Means for Solving the Problems [0006] 　Hereinafter referred to as the means and effects in order to solve the above problems. 　Ink supply container for solving the above problems includes an ink inlet channel portion, and an ink chamber communicating with the ink inlet channel section, the ink tank having, an ink supply container for replenishing ink, the ink tank a container body having an ink chamber capable of containing ink to be supplied to said provided at the end of the container body portion, the ink which the ink outlet to enable outflow of the ink from the ink chamber is formed wherein the outlet forming portion, provided in the ink outlet forming portion, a valve for sealing the ink outlet openably, the ink portion of the tank side and in contact with said valve when said valve is opened and a positioning portion for positioning the ink tank, wherein the positioning portion is located on the opposite side to the side where the container body relative to the valve is located, and the central axis of the ink outlet Has a positioning surface extending in a direction intersecting the positioning surface, said in a state in which the ink inlet channel portion wherein the valve is inserted into the ink outlet is opened in the ink tank, the portion of the ink tank to contact. [0007] 　According to this configuration, the ink supply container is moved to the ink tank side, when to open the valve by inserting an ink inlet channel portion of the ink tank to the ink outlet, the positioning surface, the ink tank before the valve to move to the side. Therefore, for example, if capable of guiding construction the movement of the positioning surface in the direction in which the ink inlet channel portion in the ink outlet is inserted simply be provided on the ink tank side, easily induces ink inlet channel portion relative to the valve Become. Further, the ink supply container, the positioning surface when the ink supply to the ink tank comes in contact with a portion of the ink tank side, since the posture is stabilized in the direction intersecting the central axis of the ink outlet, it tends to have the ink refill Te, it can be supplemented with appropriate ink to the ink tank. [0008] 　In the ink supply container, said positioning surface is preferably located on the opposite side of the container main body side of the ink outlet in a direction along the central axis of the ink outlet. 　According to this configuration, the ink supply container, when inserting the ink inlet channel of the ink tank side to the ink outlet, positioning surface approaches the ink tank before the ink outlet. Therefore, when the ink supply container is brought close to the ink tank, easily prevents the ink outlet collides with another member. Moreover, whereby damage to the ink outlet, easily preventing adhesion of ink to the other member. [0009] 　In the ink supply container, wherein the positioning surface may be formed at the front end of the cylindrical portion of the opening formed toward the ink outlet to the outside end of the ink outlet forming section it is preferable. 　According to this configuration, since the positioning surface can be formed in a cylindrical portion which is a part of the ink outlet forming portion with the ink outlet, the structure than the positioning surface is formed on the convex portion or the like provided elsewhere the ink outlet the can easily. [0010] 　Another ink supply container for solving the above problems includes an ink inlet channel portion, and an ink chamber communicating with the ink inlet channel section, the ink tank having, an ink supply container for replenishing ink, the a container body having an ink capable of accommodating ink chamber to be supplied to the ink tank, provided at an end portion of the container body, an ink outlet to enable outflow of the ink from the ink chamber is formed an ink outlet formed portions, said provided in the ink outlet forming portion, a valve for sealing the ink outlet openably, the valve is the ink tank side of the part and the contact with the valve when the valve opening the and a positioning portion for positioning with respect to the ink tank, the ink outlet is formed in a tubular portion which is a part of the ink outlet forming portion, the positioning unit, in said ink outlet It comprises a positioning surface extending in a direction crossing the axis a gap is provided between the outer surface of the tubular portion, the positioning surface, wherein the ink inlet passage portion of the ink tank is inserted into the ink outlet in a state in which the valve is open, into contact with the portion of the ink tank side. [0011] 　According to this configuration, at the time of ink supply to the ink tank from the ink supply container, since the positioning surface extending in a direction intersecting the central axis of the ink outlet is a part abutting the ink tank side, suitable ink in a stable state It can be supplied to. Further, pulling the ink adhered to the ink outlet and positioning surfaces into the gap, there is a possibility to reduce the contamination of the dripping and external ink. [0012] 　In the ink supply container, said positioning surface is a center axis part and is closer to the ink outlet towards the abutting area of ​​the ink tank side farther from the ink outlet in a direction intersecting the ink outlet it is preferable that the portion of the ink tank side is larger than in contact with the area. [0013] 　According to this configuration, the ink supply condition for opening the valve by inserting an ink inlet channel portion in the ink outlet, it is possible to enhance the stability of the posture of the ink outlet. 　Another ink supply container for solving the above problems includes an ink inlet channel portion, and an ink chamber communicating with the ink inlet channel section, the ink tank having, an ink supply container for replenishing ink, the a container body having an ink capable of accommodating ink chamber to be supplied to the ink tank, provided at an end portion of the container body, an ink outlet to enable outflow of the ink from the ink chamber is formed an ink outlet formed portions, said provided in the ink outlet forming portion, a valve for sealing the ink outlet openably, the valve is the ink tank side of the part and the contact with the valve when the valve opening the and a positioning portion for positioning with respect to the ink tank, wherein the positioning portion includes a positioning surface which is inclined or curved in a direction intersecting the central axis of the ink outlet, the positioning Face, in a state in which the ink inlet channel portion wherein the valve is inserted into the ink outlet is opened in said ink tank, said portion abutting said ink tank side. [0014] 　According to this configuration, when ink supply to the ink tank from the ink supply container in the direction of both orthogonal to the direction and the central axis along the central axis of the ink outlet can be positioned an ink supply container, appropriately perform ink supply be able to. [0015] 　In the ink supply container, the positioning surface is in a direction toward the container body from said ink outlet, are inclined or curved gradually away direction from the central axis. 　According to this structure, when inserting and removing the ink inlet channel portion of the ink outlet can be derived gradually along the positioning surface inclined or curved ink supply container. [0016] 　In the ink supply container, wherein the positioning portion is preferably provided in the portion exposed to the outside at least one of the ink outlet forming portion and the container body. 　According to this configuration, when inserting the ink inlet channel of the ink tank to the ink outlet of the ink supply container is easy to visually recognize the positioning portion from the outside. Also, when provided to a portion exposed to the outside of the positioning portion of the container body, because the container main body portion containing the ink are positioned, will be the portion of the weight is positioned, the posture of the ink supply Stabilize. [0017] 　Another ink supply container for solving the above problems includes an ink inlet channel portion, and an ink chamber communicating with the ink inlet channel section, the ink tank having, an ink supply container for replenishing ink, the a container body having an ink capable of accommodating ink chamber to be supplied to the ink tank, provided at an end portion of the container body, an ink outlet to enable outflow of the ink from the ink chamber is formed an ink outlet formed portions, said provided in the ink outlet forming portion, a valve for sealing the ink outlet openably, the valve is the ink tank side of the part and the contact with the valve when the valve opening the and a positioning portion for positioning with respect to the ink tank, the positioning portion, provided in the interior of the ink outlet. [0018] 　According to this configuration, the positioning portion is, compared to the case which is provided outside the ink outlet, because it is protected by the ink outlet, it hardly damaged. Further, since the closer to the valve positioning portion inside the ink outlet can be accurately positioned to the valve to the ink tank. Furthermore, in order to position inside the ink outlet even when ink adheres to the positioning unit, difficult to adhere the ink to the outside of the ink supply container. [0019] 　Ink supply system that solves the above problems, an ink inlet channel portion, and an ink chamber communicating with the ink inlet passage portion, an ink tank having an ink supply container having the above-described configuration, the of the ink supply container position, and the ink tank side of said portion and the positioning portion between the ink tank side of the part and the positioning part when the valve is positioned through the positioning unit relative to the ink tank and a positioning auxiliary member which mediates contact with. [0020] 　According to this configuration, when ink supply to the ink tank from the ink supply container, by using a positioning auxiliary member, it is possible to perform proper positioning for various ink tank. [0021] 　In the ink supply system, the positioning auxiliary member is preferably composed of absorbable ink absorber of the ink. 　According to this configuration, the positioning portion of the ink supply container a shock at the time of contact with a portion of the ink tank side can be alleviated by the ink absorbing material. Further, since the ink is absorbed by the ink absorbing material, it is possible to reduce the dripping or splashing when removing the ink supply container. [0022] 　Another ink supply container for solving the above problems includes an ink inlet channel portion, and an ink chamber communicating with the ink inlet channel section, the ink tank having, an ink supply container for replenishing ink, the a container body having an ink capable of accommodating ink chamber to be supplied to the ink tank, provided at an end portion of the container body, an ink outlet to enable outflow of the ink from the ink chamber is formed an ink outlet formed portions, said provided in the ink outlet forming portion, a valve for sealing the ink outlet openably, the valve is the ink tank side of the part and the contact with the valve when the valve opening the and a positioning portion for positioning with respect to the ink tank. [0023] 　According to this configuration, when the ink supply, the positioning portion of the ink supply container abuts against the part of the ink tank side, a valve for opening and closing the ink outlet is positioned with respect to the ink tank. Therefore, liable to the ink supply, can be supplemented with appropriate ink to the ink tank. BRIEF DESCRIPTION OF THE DRAWINGS [0024] [1] a perspective view schematically showing a schematic configuration of a recording apparatus in perspective state. [2] a perspective view showing an ink supply unit provided in the housing of the recording apparatus. [Figure 3] Similarly plan view of the ink supply unit. [Figure 4] a partially cutaway side view of a 4-4 taken along line in FIG. [5] a partially cutaway side view of a 5-5 taken along line in FIG. [6] a perspective view of an ink supply container in the first embodiment. [7] a side view of the ink supply container. [8] a front view of the ink supply container. [9] a plan view of the ink supply container. [10] 10-10 sectional view along line in FIG. [11] 11-11 sectional view along line in FIG. [12] partially cutaway front view showing an ink supplying operation immediately before the ink supply system. [13] partially broken side view showing an ink supplying operation immediately before the ink supply system. [14] partially cutaway front view showing an ink supply system in the ink supplying work. [15] partially broken side view showing an ink supply system in the ink supplying work. [16] partially cutaway front view showing an ink supply system of the positioning state. [17] partially broken side view showing an ink supply system of the positioning state. [18] a partial perspective view of an ink supply container in the second embodiment. [19] a partial plan view of the ink supply unit during ink supply in the second embodiment. [Figure 20] F20-F20 sectional view taken along the line in FIG. 19. [21] a partial perspective view of an ink supply container in the third embodiment. [22] partially broken side view showing an ink supply system in the third embodiment. [23] a partial perspective view of an ink supply container in the fourth embodiment. [24] a partial perspective view of an ink supply container in the fifth embodiment. [25] partially broken side view showing an ink supply system in the fifth embodiment. [Figure 26] partially broken side view showing an ink supply system in the sixth embodiment. [27] partially broken side view showing an ink supply system in the seventh embodiment. [Figure 28] partially broken side view showing an ink supply system in the eighth embodiment. [29] partially broken side view showing an ink supply system in the ninth embodiment. [Figure 30] partially cutaway side view showing an ink supply system in the tenth embodiment. [31] a perspective view of an ink supply unit in the eleventh embodiment. [Figure 32] partial plan view of the ink supply unit during ink supply in the eleventh embodiment. [Figure 33] F33-F33 sectional view taken along the line in FIG. 32. [34] partially cutaway front view showing an ink supply system in the twelfth embodiment. [Figure 35] partially broken side view showing an ink supply system in the thirteenth embodiment. [36] a perspective view showing an ink outlet forming portion in a modified example. [37] a perspective view showing the ink bottle and an ink supply device in a modification. [38] a cross-sectional view showing the ink bottle and an ink supply device in a modification. [39] an enlarged view of a D portion in FIG. 38. DESCRIPTION OF THE INVENTION [0025] 　(First Embodiment) 　Hereinafter, a first embodiment of an ink supply system comprising an ink tank and an ink supply container in the recording apparatus will be described with reference to FIG. The recording apparatus of this embodiment, by ejecting ink to a medium, a printer of an ink jet type which records images such as (printing) on a medium. Further, in the drawings, it is assumed that the vertical direction to a predetermined height, left and right directions to a predetermined width, and the recording apparatus having a predetermined depth in the longitudinal direction are placed on a horizontal surface. Then, in each figure shows the vertical direction along a vertical line, the horizontal direction along a horizontal plane perpendicular to the vertical line, and both the upper and lower directions perpendicular both the right and left directions in the longitudinal direction along the horizontal plane by an arrow. [0026] 　As shown in FIG. 1, the recording apparatus 21 has a housing 22 of rectangular parallelepiped shape whose length is oriented crosswise. Incidentally, FIG. 1 illustrates in a simplified manner in a transparent state the housing 22 in the recording device 21. At the bottom of the rearward in the housing 22, support 23 to the left-right direction is the longitudinal direction is provided with its upper surface substantially as to extend along the horizontal direction. Paper P, which is an example of the medium, while being supported on the upper surface of the support 23, is conveyed toward the front as a conveying direction. Also, the upper position of the support 23 in the housing 22, the guide shaft 24 extending along the lateral direction is bridged, the carriage 26 having a recording head 25 for ejecting ink on the lower surface side to its guide shaft 24 There has been support. That is, the carriage 26, with the guide shaft 24 into the supporting hole 27 penetrating in the lateral direction is inserted, and is supported to freely reciprocate in the lateral direction with respect to the guide shaft 24. [0027] 　At a position corresponding to the vicinity of both ends of the guide shaft 24 in the housing 22, a drive pulley 28 and the driven pulley 29 are rotatably supported respectively. Together with the output shaft of the carriage motor 30 is coupled to the drive pulley 28, and a portion is wound around the timing belt 31 of endless coupled to the carriage 26 between the drive pulley 28 and the driven pulley 29 . The conveyance, when the reciprocating along the lateral direction as the scanning direction carriage 26 by driving the carriage motor 30 with respect to the paper P while being guided by the guide shaft 24 via the timing belt 31, the upper support 23 to the front ink is ejected to the sheet P from the recording head 25 on the lower surface side of the carriage 26 to the paper P being. [0028] 　Further, as shown in FIG. 1, the front side and a position of the support 23 at the front side of the housing 22, the ink from the recording head 25 when it is conveyed on the support 23 in the housing 22 rectangular outlet 32 ​​for discharging the paper P perform recording by discharging the front side is open. The discharge port 32, the discharge tray 33 of supportable rectangular plate a sheet P discharged from within the housing 22 is provided infested freely forward a discharge direction. Also within the outlet 32, a plurality of which can accommodate paper feed cassette 34 to the paper P in a stacked state to be used for recording on the lower side of the discharge tray 33 is mounted removably inserted in the front-rear direction. [0029] 　Further, as shown in FIG. 1, (in FIG. 1, the right end side) lateral direction end portion side than the discharge opening 32 a front of the housing 22 to a position, the front and upper surface a rectangular shape door 35 the right side forms a right triangle is provided to be freely opened and closed in the longitudinal direction a rotation axis 36 extending along the left-right direction provided on the lower end as the center of rotation. The front surface of the door 35, a window portion 37 formed of a rectangular transparent member is formed, the user inside the housing 22 with closed door 35 (in particular, the back side of the front surface of the door 35 ) so that the can be visually recognized. [0030] 　In the housing 22 of the recording apparatus 21, the back and a position of the door 35, that is, and the end closer (in this case, right end portions closer) and a position in front toward the supply ink to the recording head 25 the ink supply unit 40 that is housed. The ink supply unit 40, a plurality are integrally handleable and structs contains ink tanks 41-45 of (five in this embodiment), as described later, the respective ink tanks 41-45 ink is capable replenished. [0031] 　As shown in FIGS. 2 and 3, the ink supply unit 40 includes five ink tanks 41-45 longer substantially box shape in the longitudinal direction, the five ink supply drawn from the rear side of the ink tanks 41-45 the tube 46 is configured to include the ink refill adapter 47 having a rectangular parallelepiped shape to be assembled with their ink tanks 41-45 while the batch. The ink supply adapter 47, in a state in which all of the ink tanks 41-45 are arranged side by side in the thickness direction in the lateral direction, the upper half portions of all of the ink tanks 41-45 cutout formed stepped portion by assembled to 48, it is integrated with an ink tank 41-45. Incidentally, as shown in FIG. 1, the ink supply tube 46 led out from the ink tanks 41-45 are connected to an ink flow path formed in the carriage 26 (not shown), through the ink flow channel recording It is connected to the head 25. The ink refill adapter 47 may constitute a part of the housing 22 for covering the ink tanks 41-45, the ink tanks 41-45 and may be integrally formed. [0032] 　As shown in FIGS. 4 and 5, the ink tanks 41-45 has an ink chamber 49 capable of storing the ink IK therein. In this embodiment, black ink is stored in the ink chamber 49 of the ink tank 41 located at the right end in the side-by-side direction. The color other than black in the ink chamber 49 of the other ink tanks 42-45 arranged on the left side of the right end of the ink tank 41 side by side direction (cyan, magenta, yellow, etc.) ink is stored. Further, a transparent resin to the front wall, visible liquid level of the ink IK in the ink chamber 49 to the ink tanks 41-45 is visible through the front of the window portion 37 of the housing 22 viewability portion 50 is provided. Then, the upper limit indicated in its visible part 50, the upper limit of the liquid surface of the ink IK is stored in the ink chamber 49 a guide (an example of a measure of the injectable amount of ink without overflowing the ink from the ink inlet 53) mark 51 and lower guide (e.g., a guide prompting the replenishment of the ink) lower mark 52 indicating the are marked. [0033] 　As shown in FIG. 4, the upper horizontal portion of the step portion 48 in the ink tanks 41-45 ink inlet 53 that allows the inflow of the ink into the ink chamber 49 from the outside. The ink inlet 53 is configured to include a needle 56 which is an example of an ink inlet channel portion extending vertically upward with a passage 55 for communicating the inside and the outside of the ink chamber 49. Inside the needle 56 having a cylindrical shape, two flow paths 54, 55 are partitioned by the formed partition wall so as to extend vertically in its longitudinal direction in the central position. Therefore, flow path 54, 55 of the present embodiment is formed to be approximately equal height and cross-sectional area of ​​the distal end opening. Note that the rearward lower portion of the ink chamber 49, the remaining amount sensor 57 for detecting the remaining amount of ink IK in the ink chamber 49 is provided. Incidentally, the remaining amount sensor 57 may not be provided. [0034] 　As shown in FIGS. 2 to 5, the ink supply adapter 47, the upper surface 58 is a horizontal plane along a direction direction perpendicular (crossing) of extension of the needle 56, the vertical to the bottom surface 59 on its upper surface 58 through holes 60 penetrating in the direction is formed as an ink inlet forming portion. The through hole 60 has an ink inlet 53 of the circular hole-shaped needle 56 is placed in the center, a pair of rectangular holes before and after continuing around the ink inlet 53, the lower side of the opening the ink tanks 41-45 thereof the needle 56 upwards is closed by a horizontal portion of the step portion 48 projecting from the. [0035] 　Therefore, in the through-hole 60, in a region where the outer side of the ink inlet 53 in the radial direction around the ink inlet 53, a pair of rectangular holes before and after blocked the opening of the lower, the extending direction of the needle 56 pair of recesses 61 before and after opening the upper is is depression formed as a depth direction vertically downward so as to be point symmetrical about the ink inlet 53. That is, in the ink supply adapter 47 integral with the ink tank 41-45 in a region to be the outside of the ink inlet 53 includes a needle 56, a plurality (in this case forming a point symmetry about the ink inlet 53 in the front and rear so that the recess 61 of the two) in a pair is formed. Incidentally, in this case, the tip of the needle 56 which is arranged in the center of the ink inlets 53 of the circular hole shape, the upper surface of the ink supply adapter 47 serving as the opening edge of the through hole 60 that contains the ink inlet 53 and the recess 61 than 58, it is located in the ink chamber 49 side. That is, the upper surface 58 of the ink supply adapter 47 extends in a direction intersecting the direction of extension of the needle 56 and the direction from the tip of the needle 56 needle 56 extends outside the position. Meanwhile, the lower surface 59 of the ink supply adapter 47 functions as a tank engagement part engaged from above by them collectively for a plurality of ink tanks 41-45 which is side by side in the lateral direction. [0036] 　Further, of the upper surface 58 of the ink supply adapter 47, the peripheral portion of the upper opening edge of each through hole 60 is colored to a specific color. That is colored inks of the same color of ink stored in the ink chamber 49 of the ink tank 41-45 that flows through the ink inlet 53 of the through hole 60. In this regard, the peripheral portion of the upper opening edge of each through-hole 60 in the ink refill adapter 47, the ink tanks 41-45 which ink inlet 53 and ink chamber 49 of the through-hole 60 is communicated with and stored inside functions as a first part indicating information relating to ink are outside. Incidentally, the peripheral portion of the upper opening of the through hole 60 to the ink inlet 53 communicating with an ink chamber 49 of the ink tank 41 for storing the black ink is disposed is colored black. [0037] 　Further, in the inner surface of the recess 61 (the inner surface in particular along the vertical direction), the bottom side of the upper opening edge of the recess 61 (i.e., the horizontal portion side of the step portion 48) in a position, the horizontal first uneven portion exhibiting characteristic irregularities in the direction (first key structure portion) 62, (in other words, the direction of the central axis of the ink inlet 53) the depth direction of the recess 61 is provided so as to extend along the ing. As shown in FIGS. 2 and 3, the first concave-convex portion 62, a plurality provided for each ink inlet 53 (in this embodiment, five) is the ink tanks 41-45. Therefore, the ink supply adapter 47, the rectangular recess 61 in the through holes 60 formed on each corresponding position in the vertical direction and each of the ink tanks 41-45, another through hole for each through hole 60 60 It is first uneven portion 62 with different form the first uneven portion 62 provided on the inner surface of the recess 61 of the. That is, the first concave-convex portion 62 of the ink supply container 63 having an ink outlet 65 which is connected to the ink inlet 53 in the through-hole 60 of the first concavo-convex portion 62 that is formed (see FIG. 6, etc.) (FIG. see 6, etc.) and functions as an identification unit to be identified. The "position where the bottom side of the upper opening edge of the recess portion 61" means that may be a position retracted to the bottom side even slightly than the opening edge. [0038] 　Therefore, next, it constitutes an ink supply system with the ink tanks 41-45, described ink supply container 63 for supplying the ink to the ink tanks 41-45 the residual amount of ink has become low. [0039] 　As shown in FIGS. 6-8, the ink supply container 63 in the first embodiment includes a cylindrical container body 64 made its mainly provided at the distal end portion of the container body 64, the ink supply container 63 the ink outlet 65 to allow the outflow of ink is provided with an ink outlet forming portion 66 which are opened in the tip, the from. The ink outlet forming portion 66 of this embodiment, a portion of the distal end side, and a separate configuration of the container attachment unit 67 which is added to surround the ink outlet 65. The ink outlet forming portion 66, the end portion of the container body 64 may be configured to be provided separately have a configuration provided integrally. The container attachment unit 67 is not a separate structure that is attached to the ink outlet forming portion 66, the distal end side of the ink outlet forming portion 66 may be configured to be integrally formed. [0040] 　The ink outlet 65 of the ink outlet forming portion 66, that is covered by the container attachment unit 67 a bottomed cylindrical cap 68 including the surrounding, during storage of the ink supply container 63, it is concealed from the outside. That is, the outer peripheral surface of the lower portion forming a cylindrical container attachment unit 67 while externally threaded portion 69 is formed, on the inner peripheral surface of the cap 68 internally threaded portion (not shown) is formed. Then, by screwing the internal thread portion of the cap 68 to the male screw portion 69 of the container attachment unit 67, the cap 68 is attached so as to cover the ink outlet 65 to the distal end portion of the ink supply container 63. [0041] 　Incidentally, the container attachment unit 67, the entire outer surface thereof is colored to a specific color. That is colored the same color of ink the container attachment unit 67 is accommodated in the container main body 64 to be added. In this regard, the container attachment unit 67 in the ink supply container 63 functions as a second portion indicating the information relating to ink the ink supply container 63 is housed inside the outside. Incidentally, the outer surface of the container attachment unit 67 in the ink supply container 63 for accommodating the black ink is colored black. Further, on the outer circumferential surface of each of the proximal end portion of the container body 64 and the cap 68, the projection 70 of the plurality at equal angular intervals (90 degree intervals, for example) (four in this embodiment) is formed. Incidentally, the projections 70 and is formed in order to rolling prevention of the ink supply container 63 having a cylindrical shape. Furthermore, for example, the ink supply container the container body 64 of the 63 housing the black ink may be thicker than the container body 64 of the ink supply container 63 for containing ink of other colors. In that case, the ink outlet forming portion 66 is black ink and other color inks for a common thickness of may be shaped. [0042] 　Further, as shown in FIGS. 6-8, the upper portion than the cylindrical lower end male screw portion 69 is formed on the outer peripheral surface of the container attachment unit 67, the ink in the radial direction around the ink outlet 65 in a region to be the outside of the outlet 65, protrusion 71 that projects upward on the opposite direction forming the direction in which the container body 64 of the ink outlet 65 in the direction of the central axis 85 of the ink outlet 65 is located It is. The convex portion 71 is operated to insert the tip of the ink inlet 53 side of the needle 56 into the ink outlet 65 in, fittable second recesses 61 of the upper surface 58 of the ink supply adapter 47 as a first fitting portion functions as a fitting part, (in the figure before and after) either side of the radial ink outlet 65 in the same manner as a pair of recesses 61 which sandwich the ink inlet 53 from the front and rear are provided in pairs across from. Incidentally, as shown in FIGS. 6 and 7, the convex portion 71 is formed inside the outer peripheral surface of the container body 64 in the radial direction around the ink outlet 65 in the ink supply container 63. The ink supply container 63 shown in FIG. 7, the ink outlet 65 is protruded upward on the opposite direction to the container body 64 than the convex portion 71. It may be such a configuration, the convex portion 71 may protrude upward from the ink outlet 65, as shown in Figure 22. [0043] 　As shown in FIGS. 6 and 9, the outer surface (left and right side surfaces 6 and 9) of each convex section 71, first uneven portion formed on the inner surface of the recess 61 of the ink supply adapter 47 (the 1 key structure portion) 62 and engageable with the second concave-convex portion (second key structure portion) 72 is formed. The second concave-convex portion 72 (in other words, the direction of the central axis 85 of the ink outlet 65) protruding direction of the convex portion 71 is provided so as to extend along the the convex portion 71 with fitted in the recess 61 , when the second concave-convex portion 72 is engaged with the first uneven portion 62 to connect the ink outlet 65 of the ink supply container 63 into the ink inlet 53 of the ink tanks 41-45 side. [0044] 　Between the convex portion 71 male thread portion 69 and a cylindrical lower portion formed second concave-convex portion 72 is formed of the container attachment unit 67, orthogonal to the central axis 85 of the ink outlet 65 (intersection) the positioning portion 73 of planar shape is provided so as to be positioned radially outward of the ink outlet 65 when viewed ink outlet 65 in the direction of its central axis 85. That is, the positioning unit 73 constitutes a part of the outer surface of the container attachment unit 67 is a part of the outer surface of the ink supply container 63, the container from the tip of the convex portion 71 in the direction of the central axis 85 of the ink outlet 65 It is provided at positions which are the main body portion 64 side. Then, the positioning unit 73 can be said to be the fact that provided on the container attachment unit 67 to be added to the ink outlet forming portion 66 in the ink supply container 63, a configuration provided on the outside of the ink outlet forming portion 66. [0045] 　Further, as shown in FIG. 9, in the ink outlet 65 formed in the ink outlet forming portion 66, is provided a valve 74 made of an elastic member, for example, a silicon film or the like to seal openably the ink outlet 65 ing. Incidentally, the valve 74 is in the direction of the central axis 85 of the ink outlet 65, and are (for example, see FIG. 14) which is provided at a position where the container body portion 64 side toward the positioning portion 73. Then, this valve 74, the slits 75 are provided a plurality (three in this embodiment) intersecting at equal angular intervals (120 degree intervals, for example) the center as the intersection, their slits 75 ink outlet and it is configured to open by the outer 65 is spread inward. That is, the valve 74 is a normally closed valve, when the tip of the ink inlet 53 side of the needle 56 is inserted into the ink outlet 65 in to open the valve pressed and expanded inside the tip of the needle 56. [0046] 　Then, this time, the contact with the upper surface 58 of the ink supply adapter 47 radial positioning portion 73 outside the through hole 60 including the ink inlet 53 and the recess 61 is formed in the ink outlet 65 equivalents, ink outlet 65 the valve 74 is positioned relative to the ink tanks 41-45 in the direction of the central axis 85 of the. In this regard, the positioning portion 73 of the planar shape, functions as a positioning surface extending in a direction perpendicular to the center axis 85 of the ink outlet 65 (intersection). On the other hand, the upper surface 58 of the ink supply adapter 47, the positioning portion of the ink supply container 63 when the valve 74 of the ink outlet 65 of the ink supply container 63 is opened for the ink supply to the ink tanks 41-45 73 there is a part of the abutting ink tanks 41-45 side, functions as a receiving surface for receiving the positioning portion 73 of planar shape. [0047] 　10 and FIG. 11, the container body 64 in the ink supply container 63 is a member having a bottle shape having an ink storage chamber 76 capable of accommodating ink IK therein, neck of the upper part the outer peripheral surface of the 77 male thread portion 78 is formed. On the other hand, the ink outlet forming portion 66 provided at the upper end of the container body 64 includes a large diameter portion 79 located on the outer peripheral side of the neck 77 of the container body portion 64, the ink in the position farthest from the container body portion 64 a small diameter portion 80 is a cylindrical portion that is open forming towards the outlet 65 to the outside, and an intermediate portion 81 connecting between the large-diameter portion 79 and small diameter portion 80. Then, the internal thread portion 82 formed on the inner peripheral surface of the large diameter portion 79, by screwing the male screw portion 78 formed on the outer peripheral surface of the neck 77 of the container body portion 64, the ink outlet forming portion 66 It is attached to the upper end of the container body 64. [0048] 　The container attachment unit 67 which is added to surround the ink outlet 65 to the ink outlet forming portion 66 in the ink supply container 63, a cylindrical lower end male screw portion 69 formed on its outer peripheral surface, the lower end surface the constitutes a joint portion 83 joined to the upper end surface of the large diameter portion 79 of the ink outlet forming portion 66. The joint portion 83 among the surface facing area in the front-rear direction of the circumferential surface of the ink outlet forming portion 66 of the front of the middle portion 81 of the outer surface and the rear outer surface and the surface contact with it of the ink outlet forming portion 66 that It is joined to the large-diameter portion 79. [0049] 　Therefore, next, the operation of the configuration ink supply system as described above, will be described in the following in view of the effect of the time of replenishing the ink in the ink tanks 41-45 of the ink supply unit 40 by using the ink supply container 63 . [0050] 　Incidentally, as a premise, as shown in FIG. 2, the liquid level is visible part 50 of the ink in the ink tank 41 of the black ink located rightmost among the plurality of ink tanks 41-45 which are disposed side by side for a decrease to the height of the lower-limit mark 52 marked on the bottom, in the following, it shall be described a case where the ink supplied to the ink tank 41. Further, the ink supply container 63 used in the ink supply shall black ink is sufficiently contained, from the ink supply container 63, it is assumed that the advance cap 68 is removed. Further, first formed on the inner surface of the recess 61 located around the ink inlet 53 of the shape of the second concave-convex portion 72 formed on the outer surface of convex portion 71 of the ink supply container 63 into the ink tank 41 consistent with the shape of the concave-convex portion 62, it is assumed that possible with engaging the insertion of the protrusion 71 with respect to the recess 61. [0051] 　Now, when performing the ink supply to the ink tank 41, first the user, the door 35 of the housing 22 is rotated forward around the rotation axis 36 from the closed state shown in FIG. 1 to an open state. Then, the ink supply unit 40, the upper surface 58 of the ink tank 41 to the ink supply adapter 47 in which the ink inlet 53 is formed into a 45 is exposed to the outside of the housing 22, the user, the desired ink inlet 53 it is possible to connect the ink outlet 65 of the ink supply container 63 from above against. [0052] 　Therefore, as shown in FIGS. 12 and 13, the user, the ink supply container 63 accommodating the black ink used in the ink supply in the upside down, the rightmost holes ink outlet 65 in the ink refill adapter 47 It held so as to be positioned above the 60. In other words, to align the center axis 85 of the ink outlet 65 of the ink supply container 63 and the central axis of the ink inlets 53 of the ink tank 41 of the ink supply target. In this case, the user has a color that is colored on the container attachment unit 67 of the ink supply container 63 held in the hand (second portion), the ink inlet 53 of ink tank 41 is an ink supply subject at that time colored on the upper side of the opening edge around the provided through holes 60 compare the in which the color (first part). Then, (in this case, black each other) each color are the same if, confirms that holds the ink supply container 63 adapted to this ink supply in hand, the process proceeds to subsequent work in ink supply. [0053] 　Then, lowering the ink supply container 63 from the state shown in FIG. 12 and FIG. 13, to insert the convex portion 71 of the ink supply container 63 into the recess 61 of the ink tank 41 and the integral ink refill adapter 47. Then, the realization of the insertion state of the convex portion 71 with respect to the recess 61, coincident state of the central axis 85 of the ink outlet 65 with respect to the central axis of the ink inlet 53 is ensured. Incidentally, the recess 61 in this case because of the positional state of point symmetry with respect to the needle 56 which is the center of the ink inlet 53, the convex portion 71 is set to be insertable to any of the recesses 61. Therefore, the ink supply container 63 is not necessary to ascertain the matched positional relationship between the central axis 85 in the center is rotated several times a recess 61 and a protrusion 71 of the ink outlet 65, the user, the convex portion against the concave portion 61 71 the insertion work can easily perform. [0054] 　However, at this time, only the convex portion 71 is slightly inserted into the recess 61, the tip of the needle 56 in the center of the ink inlets 53, the opening of the ink outlet 65 which is slightly protruded from the distal end of the convex portion 71 although is inserted within, not reached until the valve 74 located in the inner back of the ink outlet 65. This is because, as shown in FIG. 13, the tip of the protrusion 71 than the distance L1 between the upper end of the first concave-convex portion 62 of the upper surface 58 and the recess 61 of the ink supply adapter 47 to position the opening edge of the recess 61 towards the distance L2 between the valve 74 of the ink outlet 65 and is because long. Accordingly, engaging convex portion 71 from that state when the further inserted downward a depth direction of the recess 61, the first concave-convex portion 62 of the inner surface of the second concave-convex portion 72 is recess 61 of the outer surface of the convex portion 71 to focus. Then, to its while maintaining the engagement, further when the protrusion 71 is inserted toward the bottom side in the depth direction of the recess 61, the position of the valve 74 of the tip of the needle 56 is ink outlet 65 of the ink inlets 53 lead, thereby opening the valve 74. [0055] 　That is, as shown in FIGS. 14 and 15, to the distal end of the needle 56 the valve 74, the upper slit 75 from below (i.e., from the outside to the inside of the ink outlet 65) by pushing, the valve 74 to an open state. As a result, it is connected with the needle 56 of the ink inlets 53 of the ink outlet 65 and ink tank 41 of the ink supply container 63, supplied from the ink supply vessel 63 of the black ink into the ink tank 41 is performed. At this time, the needle 56 of the ink inlets 53 of the two lies flow paths 54 and 55, and functions as an ink flow path in which one flow path circulating the ink, as an air flow path and the other flow path to circulate air Function. For example, if a user tries to connect the ink outlet 65 to ink inlet 53 in a state of tilting the ink supply container 63, the direction of the difference tilting thereof, serving as an ink flow path of the two flow paths 54, 55 the flow path is also subject to change. [0056] 　In the case where the after inserting the convex portion 71 in the recess 61 and the second concave-convex portion 72 is not engaged with the first uneven portion 62, at which point, the user of the ink supply container 63 of other colors than black trying to insert the wrong area can be recognized. In this case, if if the upper end of the first concave-convex part 62 with the configuration are located at the same height as the opening edge of the recess 61, the engagement of the second concave-convex portion 72 is rejected to the first concave-convex portion 62 that not only that, to be rejected also the insertion of the convex portion 71 with respect to the recess 61, the user inserts the insertion convex portion 71 of the recess 61 attempts several times, also become unnecessarily spending useless work time is there. In this regard, in the present embodiment, since the height of the first concave-convex portion 62 is lower than the opening edge of the recess portion 61, guided to the bottom side in the depth direction of the recess 61 when the convex portion 71 to be inserted into the recess 61 is easily, it is prevented that the working time becomes unnecessarily long. [0057] 　Further, FIG. 14, as shown in FIGS. 16 and 17, when the needle 56 of the ink the ink tank 41 (42-45) the valve 74 of the ink outlet 65 of the supply container 63 side of the ink inlet 53 is opened, ink supply container 63 abuts the upper surface 58 of the ink supply adapter 47 which is part positioning portion 73 of the ink tank 41 (42-45) side. That is, the ink supply container 63, by the contact with the upper surface 58 of the central axis 85 and perpendicular (intersecting) the positioning portion 73 of the planar shape which functions as a positioning surface extending in a direction and the ink refill adapter 47 of the ink outlet 65, valve 74 is opened in a state of being positioned in the direction of the central axis of the ink outlet 65 to the ink tank 41 (42-45) side needle 56. [0058] 　Further, in this case, the positioning unit 73 for positioning radially outwardly of the ink outlet 65, the ink supply container 63 is a posture in which to connect the ink outlet 65 to ink inlet 53 is stably held. Further, as shown in FIGS. 14 and 15, when the positioning portion 73 of the ink supply container 63 to the upper surface 58 of the ink supply adapter 47 is in contact with an ink inlet 53 which the proximal end of the needle 56 in the ink inlet 53 is located and there is a gap between the tip of the ink outlet 65 of the bottom surface and the ink supply container 63. Therefore, it easily accumulate ink on the bottom of which are positioned proximal of the needle 56 of the ink inlet 53, is also avoided soiling that way the ink supply container 63 has ink adheres to the tip of the ink outlet 65 to accumulate that. [0059] 　Then, as shown in FIGS. 14 and 16, when the ink supply from the ink supply reservoir 63 to the ink tank 41 has been completed, than the upper limit mark 51 of the viewing portion 50 of the ink liquid surface height in the ink tank 41 If still low, it may be subjected to further further annex ink replenishment to the upper limit mark 51 with the ink supply container 63 of the same black. The ink supplying work as described above is also performed when for ink tanks 42-45 other colors other than the ink tank 41 of the black ink. [0060] 　According to the first embodiment has the advantages described below. 　(1-1) Ink supply container 63, when the ink supply to the ink tanks 41-45, the positioning portion 73 of the planar shape which functions as a positioning surface extending in a direction central axis 85 and perpendicular (crossing) of the ink outlet 65 abuts the upper surface 58 of the ink supply adapter 47 which is part of the ink tank 41-45. Then, the ink supply container 63, since the posture is stabilized in the central axis 85 and perpendicular (intersecting) to the direction of the ink outlet 65, is opened in a state where the valve 74 is positioned relative to the ink tanks 41-45, ink supply is more likely. Therefore, it is possible to replenish the appropriate ink to the ink tanks 41-45. [0061] 　(1-2) valve 74, because one or more slits 75 in the elastic member made of a silicon film or the like is constituted by a slit valve disposed, provide an ink supply container 63 having a simple structure with a small number of parts it can. [0062] 　(1-3) When connecting the ink supply container 63 from the state inclined along the radial direction two flow paths 54 and 55 from the direction of extension of the needle 56 is arranged on the ink tanks 41-45, two flow paths the ink outlet 65 of the ink supply container 63 of 54, 55 one of the flow path on the side close to the above functions as an ink flow path, the other flow paths serves as an air passage. Therefore, the user, since any of the flow path of the two flow paths 54, 55 may be an ink flow path, no case that the pick wondering flow path to the ink flow path, a fast ink supplying work It can be carried out. [0063] 　(Second Embodiment) 　will now be described with reference to FIG second embodiment. Incidentally, the second embodiment is also the following embodiments, including the part of the structure of the ink supply container 63 is different from the first embodiment, other configurations are substantially the same as the first embodiment . Therefore, the description and later for the same components as those of the first embodiment is that the same reference numerals, a duplicate omitted. [0064] 　As shown in FIG. 18, the ink supply container 63 of the second embodiment, the small diameter portion 80 toward the ink outlet 65 to the outside at the distal end of the ink outlet forming portion 66 which is an example of a cylindrical portion which opens forming positioning portion It is configured to function as a. That is, the direction in which the cylindrical small-diameter portion 80 has a front end surface of the planar shape perpendicular (intersect) with the center axis 85 of the ink outlet 65, perpendicular the tip surface and the central axis 85 of the ink outlet 65 (intersection) It constitutes the positioning surface 84 extending. [0065] 　Positioning surface 84, as shown in FIG. 18, and a front end surface of the small-diameter portion 80 formed on the inner peripheral side of the ink outlet 65. Therefore, positioning surface 84, against the valve 74 which is located deep inside than the opening edge of the ink outlet 65 in the small diameter portion 80, in the direction along the central axis 85 of the ink outlet 65, the container body 64 is positioned located on the opposite side to the side. That is, the positioning surface 84, in the direction along the central axis 85 of the ink outlet 65, of the valve 74, the side where the ink flows out from the ink outlet 65 (hereinafter, also referred to as "container leading end side".) To protrude toward there. [0066] 　The positioning surface 84 is constituted by the distal end surface of the most distant sites from the container body 64 in the direction along the central axis 85 of the ink outlet 65 in the small-diameter portion 80. Therefore, positioning surface 84, than the ink outlet 65 formed on the inner peripheral side of such a small-diameter portion 80, in the direction along the central axis 85 of the ink outlet 65, opposite to the side where the container body 64 is positioned it is located on the container distal end a side. Incidentally, the small diameter portion 80 is a tubular section in the present embodiment, the ink tank 41 (42-45) and the through hole of the integral ink refill adapter 47 (hereinafter, also referred to as "through-hole on the tank side.") 60 in the needle (ink inlet channel portion) 56 is a shape to be fitted to the ink inlet 53 of a substantially circular hole shape located at the center. [0067] 　As shown in FIGS. 19 and 20, when the ink supply to the ink tank 41 from the ink supply container 63 of the second embodiment (42-45) is the small-diameter portion 80 formed on the inner peripheral side of the ink outlet 65 is It is inserted from above into the through hole 60 of the tank side. That is, inserted into the ink inlet 53 of a substantially circular hole shape of the through-hole 60, as the small diameter portion 80 which functions as a positioning portion is fitted to the central axis 85 and aligned with the central axis of the ink inlets 53 of the ink outlet 65 It is. [0068] 　At this time, the ink supply container 63 to move to the ink tank 41 (42-45) side, the tip of the positioning face 84 of the small diameter portion 80, before the valve 74 of the inner back of the ink outlet 65, the ink tank 41 ( 42-45) moves to the side. Then, the arcuate surface of the outer peripheral surface of a cylindrical small-diameter portion 80 of the ink supply container 63 (the outer surface) form an inner peripheral surface of the ink inlets 53 (inner surface), the central axis 85 of the ink outlet 65 slides in a direction along. In other words, the positioning surface 84 is a leading end surface of the small-diameter portion (positioning portion) 80 having a cylindrical shape, by sliding the arcuate surface forming the inner peripheral surface of the ink inlet 53 in the through hole 60 of the tank side, It is guided in a direction of inserting the needle 56 into the ink outlet 65. [0069] 　Then, the small diameter portion 80 of the ink supply container 63, in a state of being inserted a positioning surface 84 of the tip to the ink inlet 53 of the through hole 60 of the tank side, ink inlet in the middle of moving toward the bottom of the through-holes 60 When the tip 53 of the needle 56 reaches to the position of the valve 74 of the ink outlet 65 from below, the needle 56 to open the valve 74. Then, from this state, when the small-diameter portion 80 of the ink supply container 63 is further moved toward the bottom of the through hole 60, the tip of the positioning surface 84 of the small diameter portion 80 abuts on the bottom thereof. That is, the ink supply container 63, since the positioning face 84 extending in a direction perpendicular to the center axis 85 of the ink outlet 65 (intersection) at the tip of the small diameter portion 80 abuts against the bottom portion of the through hole 60 of the tank side, the posture is stabilized to. As a result, it is opened in a state of being positioned in the direction of the central axis 85 of the ink outlet 65 to the valve 74 of the ink tank 41 (42-45) side needle 56. [0070] 　According to the second embodiment has the advantages described below in addition to the effect of (1-2) and (1-3). 　(2-1) an ink supply container 63 is moved to the ink tank 41 (42-45) side, the needle is inserted (ink inlet channel section) 56 valve of the ink tank 41 (42-45) in the ink outlet 65 74 when to open the positioning surface 84 is a leading end surface of the small-diameter portion (positioning portion) 80 having a cylindrical shape, previously moved to the ink tank 41 (42-45) than the valve 74. The positioning surface 84 of the tip of the small diameter portion 80 at that time is smoothly moved in the direction to be guided by the arcuate surface forming the inner peripheral surface of the ink inlet 53 in the through hole 60, insert the needle 56 into the ink outlet 65 to. As a result, it is easy to induce needle (ink inlet channel portion) 56 with the valve 74 when the ink supply. [0071] 　(2-2) an ink supply container 63 is moved to the ink tank 41 (42-45) side, the needle is inserted (ink inlet channel section) 56 valve of the ink tank 41 (42-45) in the ink outlet 65 74 when to open the tip of the positioning surface 84 of the small diameter portion 80 approaches the ink tank 41 (42-45) before the ink outlet 65 of the inner peripheral side of the small-diameter portion 80. Therefore, when the ink supply container 63 is brought close to the ink tank 41 (42-45) easily prevents the ink outlet 65 collides with another member. It also allows to protect the ink outlet 65, it tends to prevent the adhesion of ink to the other member. [0072] 　(2-3) Ink supply container 63, the positioning surface 84 when the ink supply to the ink tank 41 (42-45) abuts against the bottom portion of the through hole 60 of the tank side, intersects the center axis 85 of the ink outlet 65 attitude in the direction is stabilized. Therefore, liable to the ink supply, the ink supply container 63 can be replenished properly ink the ink tank 41 (42-45). [0073] 　(2-4) Ink supply container 63, since the positioning surface 84 can be formed on the small diameter portion (cylindrical portion) 80 which is a part of the ink outlet forming portion 66 together with the ink outlet 65, the ink outlet 65 of the positioning surface 84 the structure than forming a part of the convex portion or the like provided elsewhere can easily. [0074] 　(Third Embodiment) 　will now be described with reference to FIG third embodiment. 　As shown in FIG. 21, the ink supply container 63 of the third embodiment, the container tip in the direction along the position at which the outer ink outlet 65 in radial direction around the ink outlet 65 to the central axis 85 of the ink outlet 65 protrusion 71 protruding toward the side is configured to function as a positioning unit. That is, the convex portion 71 has a front end surface of the planar shape perpendicular to the center axis 85 of the ink outlet 65 (intersection), extending in a direction perpendicular the tip surface and the central axis 85 of the ink outlet 65 (intersection) It constitutes the positioning surface 84. [0075] 　Protrusions 71, as shown in FIG. 21, than the small-diameter portion 80 formed on the inner peripheral side of the ink outlet 65 valve 74 is located at the inner back, in the direction along the central axis 85 of the ink outlet 65, the container protrudes into the container leading end side is opposite to the side where the main body portion 64 is located. Therefore, positioning surface 84 is the tip surface of the projection 71 than the ink outlet 65 and the valve 74, in the direction along the central axis 85 of the ink outlet 65 is the side opposite to the side where the container main body 64 is positioned It is located on the container distal end. [0076] 　Further, the convex portion 71 is provided in a portion exposed to the outside of the container attachment unit 67 is a portion of the ink outlet forming portion 66. That is, the convex portion 71 is provided in a portion of the outer side of the ink outlet 65 in radial direction around the ink outlet 65 in the ink supply container 63. Then, the planar shape of the convex portion 71, the ink tank 41 (42-45) to the ink inlet 53 of a substantially circular hole shape located at the center in the through-hole 60 of the fittable substantially rectangular recess 61 continuing from the front-rear direction It has a shape. Then, the outer peripheral surface of a cylindrical small-diameter portion 80 (the outer surface), between the outer surface of the convex portion 71 opposing the outer peripheral surface, the distal end surface of the distal end surface and the convex portion 71 of the small diameter portion 80 (positioning slit-like gap 86 retractable by capillarity the ink adhering is formed on the surface 84). In the case of the third embodiment, the first concave-convex portion 62 which is formed on the inner surface of the recess 61 in the through hole 60 of the ink tank 41 (42-45) it is not provided in the first embodiment. [0077] 　As shown in FIG. 21, when the ink supply to the ink tank 41 from the ink supply container 63 of the third embodiment (42-45) is a convex portion 71 and the small diameter portion 80 is the tank side of the distal end of the ink supply container 63 It is inserted from above into the through hole 60. That is, the convex portion 71 is inserted into the recess 61 of the penetration of the tank-side hole 60, following which, the small diameter portion 80 is inserted into the ink inlet 53 in the through-hole 60. [0078] 　At this time, the ink supply container 63 to move to the ink tank 41 (42-45) side, the tip of the positioning surfaces 84 of the projections 71, before the ink outlet 65 and the valve 74 of the inner back of the small-diameter portion 80 ink tank 41 (42-45) moved to the side. The outer surface of the convex portion 71 in the ink supply container 63 relative to the inner surface of the concave portion 61 of the through hole 60 of the tank side, and slides in a direction along the central axis 85 of the ink outlet 65. In other words, positioning surface 84 substantially a rectangular front end surface of the convex portion 71 by sliding on the inner surface of the recess 61 in the through-hole 60, is guided in a direction of inserting the needle 56 into the ink outlet 65 . [0079] 　Then, the convex portion 71 of the ink supply container 63, in a state of being inserted a positioning surface 84 of the tip into the recess 61 of the through hole 60 of the tank side, ink inlet in the middle of moving toward the bottom of the through-holes 60 53 When the tip of the needle 56 reaches to the position of the valve 74 of the ink outlet 65 from below, the needle 56 to open the valve 74. Then, from this state, the convex portion 71 of the ink supply container 63 is further moved toward the bottom of the through hole 60, the tip of the positioning surfaces 84 of the projecting portion 71 abuts on the bottom thereof. That is, the ink supply container 63, since the positioning face 84 extending in a direction at the tip of the protrusion 71 perpendicular to the central axis 85 of the ink outlet 65 (intersection) abuts against the bottom portion of the through hole 60, the posture is stabilized. As a result, it is opened in a state of being positioned in the direction of the central axis 85 of the ink outlet 65 to the valve 74 of the ink tank 41 (42-45) side needle 56. [0080] 　Further, when the ink having leaked from the ink outlet 65 flows from the distal end surface of the small diameter portion 80 so as to extend toward the outside of the radial direction, outer peripheral surface (outer surface) and the convex portion 71 of the small-diameter portion 80 It is drawn by capillary action into the gap 86 between the side surface. Therefore, the look and the remaining ink leaking from the ink outlet 65 to the distal end surface of the small diameter portion 80, and may adhere to the positioning surface 84 is the tip surface of the projection 71, solidifying is prevented. [0081] 　According to the third embodiment, the (1-2), it is possible to obtain the following effects in addition to the effects of (1-3) and (2-3). 　(3-1) an ink supply container 63 is moved to the ink tank 41 (42-45) side, the needle is inserted (ink inlet channel section) 56 valve of the ink tank 41 (42-45) in the ink outlet 65 74 when to open the substantially rectangular-shaped positioning surface 84 is the tip surface of the projection 71, previously moved to the ink tank 41 (42-45) than the valve 74. The positioning surface 84 of the tip of the convex portion 71 when the can is guided on the inner face of the substantially rectangular recess 61 in the through hole 60 of the tank side smoothly moves in the direction to insert the needle 56 into the ink outlet 65 to. As a result, it is easy to induce needle (ink inlet channel portion) 56 with the valve 74 when the ink supply. [0082] 　(3-2) an ink supply container 63 is moved to the ink tank 41 (42-45) side, the needle is inserted (ink inlet channel section) 56 valve of the ink tank 41 (42-45) in the ink outlet 65 74 when to open the tip of the positioning surfaces 84 of the projecting portion 71 approaches the ink tank 41 (42-45) before the ink outlet 65 of the inner peripheral side of the small-diameter portion 80. Therefore, when the ink supply container 63 is brought close to the ink tank 41 (42-45) easily prevents the ink outlet 65 collides with another member. Moreover, whereby breakage of the ink outlet 65, tends to prevent the adhesion of ink to the other member. [0083] 　(3-3) Ink and adhering to the tip surface of the small-diameter portion 80 leaks from the ink outlet 65, for the ink deposited on the positioning surface 84, be drawn into the gap 86 between the small diameter portion 80 and the convex portion 71 Accordingly, it is possible to reduce the contamination of the dripping and external ink. [0084] 　(3-4) protrusions 71 having a positioning surface 84 on the tip is provided an ink portion exposed to the outside at the outlet forming portion 66, that is, outside of the ink outlet 65 in radial direction around the ink outlet 65 position ing. Therefore, when inserting the needle (ink inlet channel portion) 56 of the ink tank 41 (42-45) in the ink outlet 65 of the ink supply container 63, the protrusion 71 and the positioning surface 84 of the tip serves as a positioning portion easy and visible from the outside. [0085] 　(Fourth Embodiment) 　Next, referring to FIG fourth embodiment. 　As shown in FIG. 23, the ink supply container 63 of the fourth embodiment also, as in the third embodiment, the ink outlet 65 from the position where the outside of the ink outlet 65 in radial direction around the ink outlet 65 protrusions 71 is configured to function as a positioning portion that protrudes toward the container leading side in the direction along the central axis 85 of the. That is, the convex portion 71, provided on the portion exposed to the outside of the container attachment unit 67 is a portion of the ink outlet forming portion 66, in a direction perpendicular (intersecting) the distal end face with the center axis 85 of the ink outlet 65 It constitutes the positioning surface 84 extends. Further, between the the convex portion 71 and the small diameter portion 80, likewise slit-shaped gap 86 is formed. [0086] 　However, the convex portion 71 in the fourth embodiment is different from the protrusion 71 in the third embodiment, the shape of the positioning surface 84 which is the front end surface, rather than a substantially rectangular shape, has a substantially T-shaped . That is, the positioning surfaces 84 of the fourth embodiment, a linearly extending portion the radial direction around the ink outlet 65, respectively, from the end of the radially outer portion extending linearly to the radial direction to the left and right sides has a portion extending linearly. Therefore, positioning surface 84, the central axis 85 and intersecting (in this case, perpendicular to) the ink outlet 65 towards the far side of the surface area from the ink outlet 65 in a direction is also closer side surface area in the ink outlet 65, width in the direction (tangential direction) perpendicular to the radial direction around the ink outlet 65 is large. In other words, the positioning surfaces 84 of the fourth embodiment, when it is inserted into the through hole 60 of the ink tank 41 (42-45), the central axis 85 and intersecting (in this case, perpendicular to) the ink outlet 65 in the direction towards the bottom and the abutting area of ​​the through-hole 60 at the side farther from the ink outlet 65 is formed to be larger than in contact area at the side close to the ink outlet 65. Therefore, the ink supply container 63 of the fourth embodiment, the other operational effects based on the shape of the positioning surface 84 differs basically the same effects as the case of the ink supply container 63 of the third embodiment . [0087] 　According to the fourth embodiment, the (1-2), (1-3), (2-3), the following effect in addition to the effects of (3-1) to (3-4) it is possible to obtain. 　(4-1) In the case where the convex portion 71 is inserted into the through hole 60 of the ink tank 41 (42-45), it intersects the center axis 85 of the ink outlet 65 (in this case, perpendicular) to the direction, the ink outlet 65 towards the bottom and the abutting area of the through-hole 60 at the side away from is larger than the abutting area at the side close to the ink outlet 65. Therefore, in the ink supply state to open the valve 74 to the ink outlet 65 needle (ink inlet channel portion) 56 is inserted, thereby enhancing the stability of the posture of the ink outlet 65. [0088] 　(Fifth Embodiment) 　will now be described with reference to FIG fifth embodiment. 　As shown in FIGS. 24 and 25, the ink supply container 63 of the fifth embodiment also, as in the third and fourth embodiments, the outer ink outlet 65 in radial direction around the ink outlet 65 protrusion 71 protruding toward the container leading side in the direction along the central axis 85 of the ink outlet 65 is configured to function as a positioning unit from a position. That is, the convex portion 71, provided on the portion exposed to the outside of the container attachment unit 67 is a portion of the ink outlet forming portion 66, in a direction perpendicular (intersecting) the distal end face with the center axis 85 of the ink outlet 65 It constitutes the positioning surface 84 extends. Further, between the the convex portion 71 and the small diameter portion 80, likewise slit-shaped gap 86 is formed. [0089] 　However, the convex portion 71 in the fifth embodiment, the third and unlike protrusions 71 in the fourth embodiment, the protruding height smaller diameter portion of the container leading end side in the direction along the central axis 85 of the ink outlet 65 It is lower than 80. That is, the positioning surface 84 in the fifth embodiment, than the ink outlet 65 and the valve 74, in the direction along the central axis 85 of the ink outlet 65, positioned on the container base end side container body 64 is the side which is located doing. [0090] 　As shown in FIG. 25, when the ink supply to the ink tank 41 from the ink supply container 63 in the fifth embodiment (42-45) is the small-diameter portion 80 to the ink inlet 53 in the through-hole 60 of the tank side inserts are, following which, the convex portion 71 is inserted into the recess 61 in the through-hole 60. In this case, the convex portion 71 of the ink supply container 63, at a stage prior to inserting the positioning surface 84 of the tip into the recess 61 of the through hole 60 of the tank side, the tip of the needle 56 of the ink inlet 53 from below It reaches up to the position of the valve 74 of the ink outlet 65, the needle 56 to open the valve 74. [0091] 　When the convex portion 71 of the ink supply container 63 from this state to move towards the bottom of the recess 61 of the through hole 60, the tip of the positioning surface 84 of the convex portion 71 extends vertically from the inner surface of the concave portion 61 contacts the first concave-convex portion 62 provided in a rib shape. In this regard, the first concavo-convex portion 62 as an abutment for a positioning surface 84 of the ink supply container 63 abuts in positioning the inner valve 74 of the ink outlet 65 to the ink tank 41 (42-45) Function. Therefore, the ink supply container 63, first uneven part positioning surface 84 extending in a direction perpendicular to the center axis 85 of the ink outlet 65 (intersection) at the tip of the convex portion 71 in the through-holes 60 (contact portion) 62 and contact with the posture is stable. As a result, it is opened in a state of being positioned in the direction of the central axis 85 of the ink outlet 65 to the valve 74 of the ink tank 41 (42-45) side needle 56. [0092] 　According to the fifth embodiment, the (1-2), (1-3), (3-3), it is possible to obtain the following effects in addition to the effects of (3-4). 　(5-1) Ink supply container 63, the positioning surface 84 when the ink supply to the ink tank 41 (42-45) comes into contact with the first concave-convex portion (contact portion) 62 of the through hole 60 of the tank side , posture is stabilized in the direction crossing the central axis 85 of the ink outlet 65. Therefore, liable to the ink supply, the ink supply container 63 can be replenished properly ink the ink tank 41 (42-45). [0093] 　(Sixth Embodiment) 　Next, referring to FIG sixth embodiment. 　As shown in FIG. 26, from an ink supply container 63 of the sixth embodiment also, as in the third to fifth embodiments, the outer side of the ink outlet 65 in radial direction around the ink outlet 65 position protrusion 71 protruding toward the container leading side in the direction along the central axis 85 of the ink outlet 65 is configured to function as a positioning unit. That is, the convex portion 71, provided on the portion exposed to the outside of the container attachment unit 67 is a portion of the ink outlet forming portion 66, between the the convex portion 71 and the small diameter portion 80, likewise slit-shaped gap 86 is formed. [0094] 　However, the convex portion 71 in the sixth embodiment is different from the protrusion 71 in the third to fifth embodiments, the ink tank 41 (42-45) when opening the inner valve 74 of the ink outlet 65 side some positioning surface abutting the is not configured at the tip surface of the projection 71. That is, the direction the convex portion 71 in the sixth embodiment, a portion of the outer surface facing outwardly in radial direction around the ink outlet 65 (or the outer peripheral surface), which intersects the central axis 85 of the ink outlet 65 I am inclined to. The positioning surface 84 is constituted by a portion of the outer surface of the convex portion 71 which is inclined in this way (or the outer peripheral surface). The positioning surface 84 may be configured to curved in a direction intersecting the central axis 85 of the ink outlet 65. [0095] 　In this case, positioning surface 84, in the direction along the central axis 85 of the ink outlet 65, the ink outlet as the container leading end side opposite (i.e., the container body 64 is a side position) toward the container base end side is It is configured by a 65 conical and slopes which are inclined in a direction away gradually from the central axis 85 of the. When the protrusion 71 is inserted into the through hole 60 of the tank side from the tip, a portion of the surface region of the positioning surface 84 and the inclined exerts a wedge effect against the opening edge of the through hole 60 of the tank side It is formed so as to abut Te. [0096] 　As shown in FIG. 26, when the ink supply to the ink tank 41 from the ink supply container 63 of the sixth embodiment (42-45) is the small-diameter portion 80 to the ink inlet 53 in the through-hole 60 of the tank side inserts are, following which, the convex portion 71 is inserted into the recess 61 in the through-hole 60. In this case, before step positioning surface 84 which is inclined at the convex portion 71 of the ink supply container 63 which abuts the like on the opening edge of the through hole 60, the tip of the needle 56 of the ink inlets 53 of the ink outlet 65 from below It reaches to the position of the valve 74, the needle 56 to open the valve 74. Note that when inserting the small diameter portion 80 to the ink inlet 53 of the through hole 60, along the positioning surface 84 a positioning surface 84 which is inclined in the outer surface of the projection 71 from the state held against the opening edge of the through hole 60 gradually it is also possible to induce. [0097] 　When the convex portion 71 of the ink supply container 63 from this state to move towards the bottom of the recess 61 of the through hole 60 of the tank side, positioning surface 84 which is inclined in the outer surface of the convex portion 71 of the through-holes 60 It abuts against the opening edge. In this case, the ink supply container 63 is positioned against the opening edge of the through hole 60 of the positioning surface 84 is a tank side, in the horizontal direction perpendicular to the direction of gravity and gravity direction along the central axis 85 of the ink outlet 65 . Therefore, the ink supply container 63, positioning surface 84 inclined at an outer surface of the projection 71 opening edge abuts with the attitude of the through-hole 60 is stabilized. As a result, it is opened in a state of being positioned in the direction of the central axis 85 of the ink outlet 65 to the valve 74 of the ink tank 41 (42-45) side needle 56. [0098] 　According to the sixth embodiment, the (1-2), (1-3), (3-3), it is possible to obtain the following effects in addition to the effects of (3-4). 　(6-1) Ink tank 41 (42-45) and a portion of the side positioning surface 84 abuts is inclined (or curved) in a direction intersecting the central axis 85 of the ink outlet 65 for positioning. Therefore, when the ink supply from the ink supply reservoir 63 ink tank 41 to the (42-45), in both the direction along the central axis 85 of the ink outlet 65 a direction perpendicular to the (direction of gravity) and the center axis 85 (horizontal direction) , can position the ink supply container 63, it is possible to appropriately perform the ink supply. [0099] 　(6-2) When insertion of the needle (ink inlet channel portion) 56 of the ink outlet 65, can be induced gradually along the positioning surface 84 of the ink supply container 63 is inclined (or curved). 　(Seventh Embodiment) 　As shown in FIG. 27, the ink supply container 63 of the seventh embodiment, as in the case of the sixth embodiment, the outer ink outlet 65 in radial direction around the ink outlet 65 protrusion 71 protruding toward the container leading side in the direction along the central axis 85 of the ink outlet 65 is configured to function as a positioning unit from a position. That is, the convex portion 71, provided on the portion exposed to the outside of the container attachment unit 67 is a portion of the ink outlet forming portion 66, between the the convex portion 71 and the small diameter portion 80, likewise slit-shaped gap 86 is formed. [0100] 　However, the convex portion 71 in the seventh embodiment is different from the convex portion 71 in the sixth embodiment, when the convex portion 71 is inserted into the recess 61 in the through-hole 60 of the tank side, with the outside surface inclined positioning surface 84 is not formed on the can come into contact with the opening edge of the through hole 60. That is, the convex portion 71, positioning surface 84 of the outer surface, the wedge effect with respect to the upper end of the first concave-convex portion 62 that functions as a contact portion provided in a rib shape extending from the inner surface of the recess 61 in the vertical direction to demonstrate the formed so as to abut. The positioning surface 84 may be configured to curved in a direction intersecting the central axis 85 of the ink outlet 65. [0101] 　Therefore, as shown in FIG. 27, also when the ink supply to the ink tank 41 from the ink supply container 63 of the seventh embodiment (42-45), as in the case of the sixth embodiment, the through hole of the tank side 60 is the ink inlet 53 of the inner insert small diameter portion 80, following which, the convex portion 71 is inserted into the recess 61 in the through-hole 60. In this case, before step positioning surface 84 which is inclined at the convex portion 71 of the ink supply container 63 that abuts against the first concave-convex portion of the inner surface of the through hole 60 (abutment portion), the needle 56 of the ink inlets 53 tip of reach to a position of the valve 74 of the ink outlet 65 from below, the needle 56 to open the valve 74. Also in this seventh embodiment, positioning the small diameter portion 80 Upon inserting the ink inlet 53 of the through hole 60, a positioning surface 84 which is inclined in the outer surface of the projection 71 from the state held against the opening edge of the through hole 60 it is also possible to induce gradually along the surface 84. [0102] 　When the convex portion 71 of the ink supply container 63 from this state to move towards the bottom of the recess 61 of the through hole 60 of the tank side, positioning surface 84 which is inclined in the outer surface of the convex portion 71 of the through-holes 60 contacts the first concave-convex portion of the inner surface (abutment portion). Also in this case, the ink supply container 63, first uneven portion of the through hole 60 positioning surface 84 on the tank side against (abutting portion), the direction of gravity and gravity along the central axis 85 of the ink outlet 65 It is positioned in the horizontal direction perpendicular to the direction. Therefore, the ink supply container 63, the posture is stabilized positioning surface 84 inclined at an outer surface of the projection 71 is in contact with the first concave-convex portion of the inner surface of the through hole 60 (the contact portion) This. As a result, it is opened in a state of being positioned in the direction of the central axis 85 of the ink outlet 65 to the valve 74 of the ink tank 41 (42-45) side needle 56. [0103] 　According to the seventh embodiment, the (1-2), (1-3), the same effect as (3-3), (3-4), (6-1) and (6-2) it is possible to obtain. 　(Eighth Embodiment) 　As shown in FIG. 28, the ink supply container 63 of the eighth embodiment, as in the case of the sixth embodiment, the outer ink outlet 65 in radial direction around the ink outlet 65 protrusion 71 protruding toward the container leading side in the direction along the central axis 85 of the ink outlet 65 is configured to function as a positioning unit from a position. That is, the convex portion 71, provided on the portion exposed to the outside of the container attachment unit 67 is a portion of the ink outlet forming portion 66, an outer surface facing outwardly in radial direction around the ink outlet 65 (or positioning surface 84 is provided on the outer circumferential surface). [0104] 　However, the convex portion 71 in the eighth embodiment is different from the convex portion 71 in the sixth embodiment, the positioning surfaces 84 provided on its outer surface, an inclined in a direction intersecting the central axis 85 of the ink outlet 65 It is curved without. The positioning surface 84 is also in the direction along the central axis 85 of the ink outlet 65, opposite to the container leading end side (i.e., the container body 64 is a side position) of the ink outlet 65 toward the container base end side is It is configured by a conical surface and the slope curved in a direction away gradually from the central axis 85. When the protrusion 71 is inserted into the through hole 60 of the tank side from the tip, a portion of the surface region of the positioning surface 84 and the curved exerts a wedge effect against the opening edge of the through hole 60 of the tank side It is formed so as to abut Te. The positioning surface 84 may be configured to have inclined in a direction intersecting the central axis 85 of the ink outlet 65. [0105] 　As shown in FIG. 28, also when the ink supply to the ink tank 41 from the ink supply container 63 of the eighth embodiment (42-45), as in the case of the sixth embodiment, the ink outlet 65 of the small-diameter portion 80 needle 56 of the ink inlet 53 is first inserted, the valve 74 is opened. Thereafter, the opening edge of the through hole 60 of the tank side, positioning surface 84 which is curved in the outer surface of the projection 71 of the ink supply container 63 abuts the ink supply is performed in this state. [0106] 　According to the eighth embodiment, the (1-2), (1-3), the same effect as (3-3), (3-4), (6-1) and (6-2) it is possible to obtain. 　(Ninth Embodiment) 　As shown in FIG. 29, the ink supply container 63 of the ninth embodiment differs from the case of the first to eighth embodiments, the positioning unit and the positioning surface is centered on the ink outlet 65 It is provided inside the ink outlet 65 in the radial direction. That is, between the ink supply container 63 of the ninth embodiment is an ink outlet forming portion 66, a small diameter portion 80 is a tubular portion forming the ink outlet 65 to the inner circumference side and an intermediate portion 81 continuous with the base end side the partition wall 87 is formed, a positioning portion is formed by the partition wall 87. A position through which the central axis 85 of the ink outlet 65 in the central portion of the partition wall 87, the communicating hole 88 for communicating the ink outlet 65 in the ink chamber 76 is formed through. [0107] 　Then, the partition wall 87, positioning surface 84 is formed by a wall surface located on the container distal end in the direction along the central axis 85 of the ink outlet 65. The positioning surface 84 is such that the front end surface of the ink tank 41 (42-45) side needle (ink inlet channel portion) 56 is made possible contact with surface contact, perpendicular to the central axis 85 of the ink outlet 65 (cross) is formed in a planar shape extending in a direction. [0108] 　As shown in FIG. 29, when the ink supply to the ink tank 41 from the ink supply container 63 of the ninth embodiment (42-45) is the small-diameter portion 80 to the ink inlet 53 in the through-hole 60 of the tank side inserts It is, when the tip of the needle 56 of the ink inlet 53 reaches up to the position of the valve 74 of the ink outlet 65 from below, the needle 56 to open the valve 74. When the ink supply container 63 from this state is further moved to the ink tank 41 (42-45) side, positioning surface 84 is a needle (ink inlet channel planar shape formed inside the partition wall 87 of the ink outlet 65 portion) abuts against the 56 distal end face of the. Therefore, the ink supply container 63, positioning surface 84 provided in a planar shape extending in a direction inside the perpendicular to the central axis 85 of the ink outlet 65 (intersection) of the ink outlet 65 is needle (ink inlet channel portion) 56 of the the distal end surface and the contact with the posture is stabilized. As a result, it is opened in a state of being positioned in the direction of the central axis 85 of the ink outlet 65 to the valve 74 of the ink tank 41 (42-45) side needle 56. [0109] 　According to the ninth embodiment has the advantages described below in addition to the effect of (1-2) and (1-3). 　(9-1) positioning portions (in this case, the partition walls 87) and the positioning surface 84, compared with a case that is provided outside the ink outlet 65, because it is protected by the ink outlet 65, can not easily damaged. The positioning portion in the ink outlet 65 (in this case, the partition walls 87) and for positioning surface 84 is closer to the valve 74, it can be precisely positioned a valve 74 to the ink tank 41 (42-45). Furthermore, the positioning portion (in this case, the partition walls 87) and the ink on the positioning surface 84 is located inside of the ink outlet 65 be attached, difficult to adhere the ink to the outside of the ink supply container 63. [0110] 　(Tenth Embodiment) 　As shown in FIG. 30, the ink supply container 63 of the tenth embodiment, as in the case of the ninth embodiment, the positioning unit and the positioning surface, radial direction around the ink outlet 65 in is provided inside the ink outlet 65. That is, the positioning portion is constituted by a partition wall 87 formed between the small-diameter portion 80 and the intermediate portion 81 of the ink outlet forming portion 66, in its partition wall 87, the container leading end side in the direction along the central axis 85 of the ink outlet 65 positioning surface 84 is formed by a wall located. In the central portion of the partition wall 87, the communicating hole 88 for communicating the ink outlet 65 in the ink chamber 76 is formed through. [0111] 　However, the positioning surfaces 84 in the tenth embodiment is different from the positioning surface 84 in the ninth embodiment is inclined in a direction intersecting the central axis 85 of the ink outlet 65. That is, the positioning surface 84, in the direction along the central axis 85 of the ink outlet 65, and is configured by a conical surface and the slope which is inclined in a direction away gradually from the central axis 85 of the ink outlet 65 toward the container leading end . When the distal end surface of the needle is open the valve 74 (the ink inlet channel portion) 56 comes into contact from below, some needle (ink inlet channel portion) of the surface region of the positioning surface 84 and the inclined 56 It exerts a wedge effect is formed so as to abut against. [0112] 　According to the tenth embodiment, the (1-2), it is possible to obtain the same effect as (1-3) and (9-1). 　(Eleventh Embodiment) 　As shown in FIGS. 31 to 33, an ink supply unit 40 of the ink supply system with the ink supply container 63 of the eleventh embodiment is a structure ink inlet 53 to be occluded is usually . That is, the ink supply unit 40 is provided with a lever-shaped cap supporting member 90 for each of a plurality of ink inlets 53. Proximal end of the cap support member 90 is rotatably pivot shaft 91 provided so as to extend in a direction (horizontal direction) intersecting the central axis of the ink inlet 53 to the upper surface 58 of the ink supply adapter 47 support It is. Elastic cap 92 in which the shape to be fitted to the ink inlet 53 to the distal end side than the center in the longitudinal direction of the cap support member 90 is provided, the cap support member 90, the ink elastic cap 92 is usually inlet 53 in fitted closed state. [0113] 　Then, as shown in FIGS. 31 and 32, at the time of ink supply, the cap support member 90 the elastic cap 92 is in a fitted closed to the ink inlet 53, put his hand on the handle portion 93 is bent at the distal end the user is tilted in the open state the elastic cap 92 is moved away from the ink inlet 53. Incidentally, as shown in FIG. 31, it may be further provided openably a unit cover 100 collectively covering the upper plurality of cap support member 90. The elastic cap 92 is formed of an elastic material such as elastomer, the cap support member 90 made of, for example, polystyrene, ABS resin or the like, are formed at higher elastic cap 92 of rigid material. [0114] 　As shown in FIGS. 32 and 33, the ink supply container 63 of the eleventh embodiment, the shoulder portion located on the container distal end side in the ink outlet forming portion 66 constitutes a positioning portion of the ink outlet 65 at its shoulder portion plane of plane shape extending in a direction orthogonal to the central axis 85 (intersection) constitutes the positioning surface 84. From the central portion of the positioning surface 84, the small diameter portion 80 is a tubular portion forming the ink outlet 65 to the inner peripheral side protrudes toward the container leading side. [0115] 　When ink supply to the ink tank 41 from the ink supply container 63 such eleventh embodiment (42-45), first, the elastic cap 92 of the ink inlet 53 of the ink tank 41 of the ink supply target (42-45) is the cap support member 90 which is closed to the open state. Then, the needle (ink inlet channel portion) of the open ink inlet 53 56 To insert the ink outlet 65 of the ink supply container 63. Then, lead tip of the needle 56 of the ink inlet 53 to the position of the valve 74 of the ink outlet 65 from below, the needle 56 to open the valve 74. Then, further when moving, positioning surface 84 formed on the shoulder portion of the ink outlet forming portion 66 is in contact with the upper surface of the cap support member 90 of the ink supply container 63 from that state to the ink tank 41 (42-45) side, an ink supply container 63 and the valve 74 of the ink outlet 65 is positioned with respect to the ink tank 41 (42-45). In other words, positioning the cap support member 90 is positioned between the ink supply positioning surface 84 and the ink tank 41 (42-45) of the container 63 of the side part (such as a through-hole 60), mediate their abutment functions as an auxiliary member. [0116] 　Incidentally, in this case, the positioning surface 84 abuts the elastic cap 92 of the ink inlet 53 of the other ink tank adjacent to the ink tank of the ink supply target (e.g. ink tank 43) (e.g., the ink tank 42, 44) in a top of the cap support member 90 are closed. Thus, by abutting the positioning surface 84 on the upper surface of the cap support member 90 on both sides, a wide contact area can be ensured. The upper surface 58 of the ink supply adapter 47 through holes 60 on the tank side is formed, for example, or have stepped or inclined, if not suitable for abut the positioning surfaces 84, constant cap support member 90 having a flat portion of is used as auxiliary positioning members. [0117] 　According to the eleventh embodiment has the advantages described below in addition to the effect of (1-2) and (1-3). 　(11-1) when the ink supply from the ink supply reservoir 63 to the ink tank 41 (42-45), the auxiliary positioning member (in this case, the cap support member 90) by using a variety of ink tanks 41 (42 ~ 45) to be able to perform proper positioning. [0118] 　(Twelfth Embodiment) 　As shown in FIG. 34, the ink supply container 63 of the twelfth embodiment, as in the case of the eleventh embodiment, at the time of ink supply, the ink tank 41 of the ink supply target (42-45) the ink inlets 53 of the other ink tank closed by an elastic cap 92 has a cap supporting member positioning surface 84 on the upper surface 90 of the next is configured to abut. That is, when to insert the ink outlet 65 of the ink supply container 63 to the needle (ink inlet channel portion) 56 of the open ink inlet 53, the needle 56 to open the valve 74. When the ink supply container 63 from this state is further moved to the ink tank 41 (42-45) side, positioning surface 84 abuts against the upper surface of the cap support member 90. [0119] 　However, in the case of the twelfth embodiment, unlike the eleventh embodiment, instead of the ink outlet forming portion 66, the shoulder portion of the container body 64 of the container base end side than the positioning portion, the container body the surface of the planar shape extending in the central axis 85 and perpendicular (intersecting) to the direction of the ink outlet 65 constitutes a positioning surface 84 at 64 shoulder portion. Therefore, at the time of ink supply, the weight of the container body 64 having an ink chamber 76, to join directly to the cap support member 90 which serves as a positioning aid member, the ink supply container 63 is positioned in a stable posture. [0120] 　According to the twelfth embodiment, the (1-2), it is possible to obtain the same effect as (1-3) and (11-1). 　(Thirteenth Embodiment) 　As shown in FIG. 35, the ink supply system of the thirteenth embodiment, the tip surface of the projection 71 which protrudes into the container distal end side of the ink supply container 63 constitute a positioning surface 84. At the time of ink supply, the ink absorbing member 89 is positioned as a positioning auxiliary member between the bottom of the through hole 60 of the positioning surface 84 and the tank side is the tip surface of the projection 71 inserted into the through hole 60 of the tank side It is configured to. The ink absorbing material 89 is made of, for example, an elastic member such as sponge, and also functions as a buffer material between the bottom of the convex portion 71 and the tank side of the through-hole 60 of the ink supply container 63. Further, the ink absorbing material 89, by adjusting the thickness, has the function of adjusting the depth on insertion of a needle (ink inlet channel portion) 56 to the ink outlet 65. [0121] 　According to the thirteenth facilities embodiment, the (1-2), it is possible to obtain the following effects in addition to the effects of (1-3) and (11-1). 　(13-1) positioning surface 84 of the ink supply container 63 is an impact at the time of contact with a portion of the ink tank 41 (42-45) side can be alleviated by the ink absorbing material 89. Further, since the ink is absorbed by the ink absorbing material 89, it can be reduced dripping or splashing when removing the ink supply container 63. [0122] 　The above embodiment may be modified as follows. 　In the second embodiment shown in FIGS. 18 to 20, the container attachment unit 67 may be omitted. 　The small diameter portion to form an ink outlet 65 in the-circumferential side 80 b of the through-hole 60 of the tank side according to the shape of the inner surface of the ink inlet 53, not necessarily limited to a cylindrical shape, it may be a rectangular tube . However, the ink outlet 65 of the inner peripheral side of the small-diameter portion 80, it is preferable opening shape is circular. [0123] 　- In the third and fourth embodiments shown in FIGS. 21 to 23, the height of projecting container leading end side of the convex portion 71, if protrudes from the small-diameter portion 80, the high at the height embodiment but it is not limited to be. [0124] 　· In the fourth embodiment, the shape of the front end surface of the projection 71 constituting the locating surface 84, an ink tank 41 (42-45) at the side far from the ink outlet 65 in a direction intersecting the central axis 85 of the ink outlet 65 if a part and the side closer to the ink outlet 65 of the abutting area of ​​the side is larger than in contact with the area, but is not limited to a substantially T-shape in the embodiment. For example, it may be like a substantially Y-shaped or triangular. [0125] 　· In the fifth embodiment shown in FIGS. 24 and 25, the height of projecting container leading end side of the convex portion 71, if not protrude from the small-diameter portion 80, the height limited to the height in the embodiment not. [0126] 　· In the sixth embodiment shown in FIG. 26, positioning surface 84 which is inclined may extend to the tip of the projecting portion 71. 　In-seventh embodiment shown in FIG. 27 (and the fifth embodiment shown in FIG. 25), the first concavo-convex portion 62 formed as an abutment against the positioning surface 84 on the inner surface of the concave portion 61, in addition to rib or the like may be protruding. [0127] 　· In the ninth and tenth embodiments shown in FIGS. 29 and 30, positioning surface 84 provided within the ink outlets 65 may be a concave spherical surface which communication hole 88 is formed in the center. 　- In the third to seventh embodiments, the width of the slit-shaped gap 86, if the width of the capillary phenomenon is exhibited, but are not limited to a width in the embodiment. [0128] 　· Two flow paths 54, 55 needle (ink inlet channel portion) 56 has an ink inlet 53 may be a plurality of flow paths configurations other than two. 　Ink supply container 63, the ink outlet forming portion 66 and the container body 64 may be integrated into one component, the positioning unit and the positioning surface 84, the container attachment unit 67 without the ink outlet forming portion 66 and the container body 64 it may be provided. [0129] 　· In the eleventh and twelfth embodiments shown in FIGS. 31 to 34, auxiliary positioning members that mediate contact between the positioning unit portion of the ink tank 41 (42-45) side, the ink outlet forming portion 66 it may be constituted by the container attachment unit 67 to be added. [0130] 　- In a thirteenth embodiment shown in FIG. 35, the positioning auxiliary member is not limited to the ink absorbing material 89, it may be, for example, resin spacers. 　- valve 74 of the ink outlet 65 of the ink supply container 63, if one or more slits 75 may be one slit 75 of the other plurality book has provided such two or four is not limited to three. Further, not limited to the slit valve where the slit 75 is provided, without a slit 75, the needle 56 is pushed from below may be a valve arrangement which is displaced in the opening direction. [0131] 　In the third embodiment shown in FIGS. 21 and 22, may be modified as follows. 　Incidentally, in FIG. 37 and 38, X-axis, Y-axis, Z-axis is depicted the three spatial axes orthogonal to each other. Arrow X direction is, for example, as shown in FIG. 2, corresponding to the right direction. Arrow Y direction is, for example, as shown in FIG. 2, corresponding to the previous direction. Arrow Z direction is, for example, as shown in FIG. 2, corresponding to the upward direction. The ink outlet forming part 165, as shown in FIG. 36, the positioning portion 121 of the plurality (two in this modification) is provided. In the following, two positioning portions 121 when individually identify the two positioning portions 121, respectively, are denoted as the positioning portion 121A and the positioning unit 121B. When viewed in plan in a direction toward the ink outlet forming portion 165 from the cylindrical portion 192 to the coupling portion 191, the positioning portion 121B and the positioning unit 121A, are positioned outside of the cylindrical portion 192. [0132] 　In the ink outlet forming portion 165, the positioning portion 121B and the positioning unit 121A, is provided in the coupling portion 191. When viewed in plan in a direction toward the ink outlet forming portion 165 from the cylindrical portion 192 to the coupling portion 191, the positioning portion 121B and the positioning unit 121A, is provided at a position facing each other across the cylindrical portion 192. A positioning portion 121A and the positioning portion 121B protrudes toward the end surface 194 side from the coupling portion 191. A positioning portion 121A and the positioning unit 121B are respectively attached to the cylindrical portion 192 through the coupling portion 122. [0133] 　The positioning portion 121A and the positioning unit 121B, respectively, the third recess 123 is provided. Third recess 123 is engaged with the first uneven portion 62 formed in the through hole 154 corresponding to the through hole 60 in the ink refill adapter 47 of the ink supply unit 40 (FIG. 2). A first concave-convex portion 62 of the through hole 154, if the third recess 123 and are adapted to each other in the positioning unit 121 can insert the ink outlet forming portion 165 to the through hole 154. In one through hole 154, the first concave-convex portion 62 is disposed in point symmetry with respect to the center point of the connecting pipe 149. Thus, when viewed in plan in a direction toward the ink outlet forming portion 165 from the cylindrical portion 192 to the coupling portion 191, the positioning unit 121A and the positioning unit 121B is arranged in point symmetry with respect to the center axis CL of the ink outlet 195 . Positioning portion 121B and the positioning unit 121A, to the center axis CL of the ink outlet 195 are formed at equal intervals at intervals of a phase angle 180 °. The center axis CL, when viewed in plan in a direction toward the ink outlet forming portion 165 from the cylindrical portion 192 to the coupling portion 191, an axis passing through the vertical center of the region surrounded by the periphery of the ink outlet 195 for this area it is. [0134] 　The outer wall portion of the cylindrical portion 192, second projecting portion 124 is formed. The second protrusion 124 is provided continuously over the outer periphery of the cylindrical portion 192. Thus, a step is formed between the outer and the second convex portion 124 of the tubular portion 192. Thus, between the outer periphery and the second convex portion 124 of the tubular portion 192, the wall 125 connecting the step between the outer wall and the second convex portion 124 of the cylindrical portion 192 is present. Wall 125 is oriented in a direction from the coupling portion 191 to the cylindrical portion 192. The portion located closest end surface 194 side of the coupling portion 122 for coupling the positioning portion 121 and the cylindrical portion 192 in the axial direction of the central axis CL, provided at a position far from the ink outlet 195 than the wall 125 there. [0135] 　Further, the end face 194 of the cylindrical portion 192, first recess 231 is formed in the outer part of the ink outlet 195. The first recess 231, as shown in FIG. 21, are formed in a direction is concave toward the container body 64 side. Therefore, easily dammed sagging ink from the ink outlet 195 in the end face 194 in the first recess 231. Thereby, easily prevent the ink dripping from the ink outlet 195 in the end face 194 from diffusing into the container body 64 side. Thus, in the ink supply container 162, it tends to improve the convenience. [0136] 　As described above, the outer wall portion of the cylindrical portion 192, second projecting portion 124 is formed. Thus, since a step is formed between the outer wall and the second convex portion 124 of the tubular portion 192, easily dammed ink by a wall 125 connecting the step. Thereby, the ink dripping from the ink outlet 195 in the cylindrical portion 192 is easily prevented from being diffused into the container body 64 side. Thus, in the ink supply container 162, it tends to improve the convenience. [0137] 　Further, as shown in FIG. 36, the portion located most end surface 194 side of the coupling portion 122 in the axial direction of the central axis CL, it is provided at a position far from the ink outlet 195 than the wall 125. In other words, a step which is formed in a cylindrical portion 192, is provided at a position closer to the ink outlet 195 than the binding part 122. Therefore, likely it is blocked by a wall 125 before the ink dripping from the ink outlet 195 in the cylindrical portion 192 reaches the coupling portion 122. As a result, the ink dripping from the ink outlet 195 in the cylindrical portion 192 is less likely to reach the coupling part 122, it is easy to prevent the ink from diffusing into the positioning portion 121 side. [0138] 　When the third recess 123 of the positioning section 121, to match the first uneven portion 62 of the through hole 154 corresponding to the through hole 60 in the ink refill adapter 47 of the ink supply unit 40 (FIG. 2), as shown in FIG. 37 , can be inserted ink outlet formation portion 165 of the ink supply container 162 to the through hole 154. At this time, as shown in FIG. 38 is a cross-sectional view, the outlet flow path 193 of the ink outlet forming portion 165, the connection pipe 149 of the ink tank 131 is inserted. In FIG. 38, the cross-section is shown of when the ink tank 131 and the ink supply container 162 shown in FIG. 37 taken along the YZ plane. At this time, as shown in FIG. 39 is an enlarged view of a D portion in FIG. 38, the valve 101 is opened by the connecting tube 149. [0139] 　In a state where the positioning portion 121 of the ink outlet forming portion 165 abuts the bottom of the through hole 154 from the bottom of the through hole 154 and the distance L11 to the end face 194, from the bottom of the through hole 154 to the distal end 132 of the connecting tube 149 the distance L12 has the following relationship (1). 　　L11