Specification
Patent application title: Plate, holding device and holding method for plate
Technical field
[0001]
　The present invention relates to a plate used in a sliding nozzle device for controlling the flow rate of molten metal, and a holding device and a holding method for holding the plate.
Background art
[0002]
　Two or three refractory plates are used in the sliding nozzle arrangement, each plate being attached to a metal frame. When this plate is worn out and has reached the end of life, the sliding nozzle device must be opened and the old plate removed from each plate storage frame and replaced with a new plate. This replacement operation must be performed at high temperature, and the weight of the plate is about 30 kg when heavy, which places a heavy burden on the operator.
[0003]
　For this reason, plate holders have been developed to replace plates. For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 7-132484) discloses that a plate is held by a pair of claws of a parallel chuck. However, it is difficult to accurately control the positioning of the plate with respect to the metal frame by merely grasping the plate.
[0004]
　Further, according to Patent Document 2 (Japanese Patent Application Laid-Open No. 8-239233), when the cartridge of the cartridge type sliding valve device (SV device) is held by a hand and fitted and fixed at a predetermined position of the SV device main body, Discloses a method of engaging the recess of the cartridge with a pin provided inside the SV device by means of the lock pin and the positioning fitting of the SV device body. However, if positioning is performed only by the hand and the SV device, if variations in dimensions (eg, length) occur during manufacture of the cartridge, the positions of the recess of the cartridge and the pins provided inside the SV device are shifted, and engagement is achieved. There is a problem that can not be done.
[0005]
　On the other hand, Patent Document 3 (International Publication No. 2012/133181) discloses a mechanism for positioning a plate and a plate storage frame. Specifically, the first engaging portion is extended from one of the sliding direction both end portions of the plate, and the second engaging portion is extended from the other of the sliding direction both end portions, The frame is provided with a first receiving portion engaged with the first engaging portion and a second receiving portion engaged with the second engaging portion, and the first engaging portion engages with the first receiving portion Position of the fitting convex part or fitting concave part of the plate and the fitting concave part or fitting convex part of the plate storage metal frame align in the plate sliding direction, and the second engagement The direction perpendicular to the plate sliding direction of the fitting convex portion or fitting concave portion of the plate and the fitting concave portion or fitting convex portion of the plate storage metal frame when the portion engages with the second receiving portion A fixed structure of the plate is disclosed in which the position of the is aligned. However, in patent document 3, the operation itself of attaching a plate to a plate storage metal frame is manual operation, and there is a problem that a burden on a worker is large as mentioned above.
Prior art documents
Patent document
[0006]
Patent Document 1: Japanese Patent Application Laid-Open No. 7-132484
Patent Document 2: Japanese Patent Application Laid-Open No. 8-39233
Patent Document 3: International Publication No. 2012/133181
Summary of the invention
Problems that the Invention is to Solve
[0007]
　The problem to be solved by the present invention is to provide a plate, a holding device and a holding method thereof for facilitating the operation of attaching the plate to the plate storage frame of the sliding nozzle device.
Means to solve the problem
[0008]
　According to one aspect of the present invention, the following plate holding devices (1) to (6) are provided.
(1) A plate holding device for holding a plate so that the plate can be moved along the guide in order to mount the plate along the guide while positioning the plate on the metal frame of the sliding nozzle device,
　A plurality of holding portions having engagement grooves for engaging with the holding portions
　of the plate , and expansion / contraction means for expanding and contracting the intervals between the plurality of holding portions, and the holding portions of the plate are held in the engagement grooves. A plate holding device having clearances in which the plate can move in the longitudinal direction, width direction, and thickness direction of the plate when engaged to hold the plate.
(2) The plate holding device according to (1), wherein the plurality of holding portions face each other in parallel, and the expansion / contraction means expands / contracts the spacing between the plurality of holding portions while maintaining the plurality of holding portions parallel. apparatus.
(3) The plate holding | maintenance apparatus as described in (1) or (2) which has a pressing part for pressing a plate in plate storage metal frame direction.
(4) The number of the plurality of holding portions is two, and one engaging groove is provided on each side of each holding portion, for a total of four in two holding portions, and the two holding portions are
　further provided. The plate holding device according to (1), (2) or (3), further comprising control means for controlling the minimum distance between the parts.
(5) The plate holding device according to (4), wherein the expansion and contraction means expand and contract the distance between the two holding portions in the longitudinal direction of the plate.
(6) The engagement groove is constituted by four contactable portions in total: the outside in the width direction of the plate, the outside in the longitudinal direction of the plate, and both sides in the thickness direction of the plate; The plate holding device according to any one of (5).
[0009]
　According to another aspect of the present invention, the following (7) and (10) plates are provided.
(7) A plate which is held by the plate holding device according to any one of (1) to (6), and which has an engaging protrusion which protrudes from a side surface of the plate as the held portion.
(8) The plate according to (7), wherein the engagement protrusions are provided at four places symmetrically with respect to a longitudinal central axis of the plate.
(9) The plate according to (7) or (8), wherein the engagement protrusion is a plate shape extended from a back plate of the plate.
(10) The engagement protrusion according to (7), (8) or (9), which has a corner portion perpendicular to the longitudinal central axis of the plate on the side opposite to the nozzle hole of the plate. plate.
[0010]
　According to still another aspect of the present invention, there is provided the following method (11) for holding a plate.
(11) A plate holding device for holding the plate by the plate holding device so that the plate can move along the guide in order to position the plate along the guide while mounting the plate on the metal frame of the sliding nozzle device. In the method, the
　plate holding device is provided with a plurality of holding portions having engagement grooves for engaging with the holding portions of the plate, and expansion / contraction means for expanding / contracting the distance between the plurality of holding portions.
　When the holding portion of the plate is engaged with the engagement groove to hold the plate, the longitudinal direction, the width direction and the thickness direction of the plate are between the holding portion of the plate and the inner wall surface of the engagement groove A method of holding the plate, which secures a gap so that the plate can move.
Effect of the invention
[0011]
　According to the holding device and holding method of the plate of the present invention, when the holding portion of the plate is engaged with the engaging groove of the holding portion of the plate holding device to hold the plate, the holding portion of the plate is the plate By securing the gap so as to be movable in the longitudinal direction, width direction and thickness direction, the plate can move in any direction within the range of the gap. Therefore, even if there are variations in the plate manufacturing dimensions, the plate can be accurately positioned on the plate storage frame, and the plate can be easily attached to the plate storage frame. Further, the plate of the present invention can be suitably used for the plate holding device of the present invention, and the work of attaching the plate to the plate storage frame can be easily performed.
Brief description of the drawings
[0012]
FIG. 1 is a perspective view showing a plate holding device according to a first embodiment of the present invention.
2 is a perspective view showing a state in which the plate is held by the plate holding device of FIG.
3 is a longitudinal sectional view showing a state in which the plate held by the plate holding device of FIG. 1 is attached to a plate storage frame of a sliding device.
FIG. 4 is a perspective view showing a plate holding device according to a second embodiment of the present invention.
5 is a perspective view showing a state in which the plate is held by the plate holding device of FIG. 4;
6 is an explanatory view of a gap between the holding portion and the held portion of the plate in the plate holding device of FIG. 4;
7 is a partial enlarged cross-sectional view of a holding portion in the plate holding device of FIG.
8 is an enlarged side view of a pressing portion in the plate holding device of FIG. 4;
FIG. 9 is a perspective view showing a plate used in the second embodiment of the present invention attached to a plate storage frame.
FIG. 10 is a cross-sectional view showing the plate used in the second embodiment of the present invention attached to a plate storing metal frame.
FIG. 11 is a perspective view of a plate used in the third embodiment of the present invention.
MODE FOR CARRYING OUT THE INVENTION
[0013]
　Hereinafter, embodiments of the present invention will be described based on examples.
[0014]
(First Embodiment)
　FIG. 1 shows a plate holding apparatus according to a first embodiment of the present invention. The plate holding device 1 has a parallel hand 3 as expansion / contraction means, and a pair (two) of holding portions 4 attached to a pair of (two) parallel claws 31 of the parallel hand 3. The parallel hand 3 causes the rod 34 to move back and forth from the main body 32 to expand and contract the distance between the pair of parallel claws 31. In addition, an engaging groove 41 is provided at the tip of each holding portion 4. The pair of holding portions 4 oppose each other in parallel, and can be moved synchronously and approached and separated by the parallel hand 3. That is, the parallel hand 3 enlarges and reduces the distance between the pair of holding portions 4 while maintaining the parallelness of the pair of holding portions 4. The expansion and contraction means is not limited to the parallel hand, and for example, a parallel chuck can be used, and it is also possible to manufacture a hydraulic cylinder, an air cylinder or the like.
[0015]
　2 shows a state in which the plate is held by the plate holding device in FIG. 1, and FIG. 3 shows a state in which the plate held by the plate holding device in FIG. 1 is attached to a plate storage frame of the sliding device. The plate 2 held by the plate holding device 1 is a fireproof plate 201 having a nozzle hole 202 through which molten steel passes, and a metal (thin iron) back plate 203 provided on the back of the fireproof plate 201 and having an opening 204. And a metal band 205 provided on the side surface of the fireproof plate 201, and a protrusion 207 of the fireproof plate protrudes from the opening 204 of the back plate 203. The projecting portion 207 has a truncated cone shape whose side surface is inclined. The surface of the refractory plate 201 opposite to the back plate 203 is a sliding surface 206, and the molten steel flow rate can be controlled by sliding contact with the sliding surface of another plate. The plate 2 is attached to the plate storage frame 6 so that the other plate is in sliding contact in the direction of arrow A in FIG.
[0016]
　The plate 2 is held by the plate holding device 1 by engaging both end portions in the longitudinal direction (sliding direction) with the engaging grooves 41 of the holding portion 4 of the plate holding device 1. That is, in this embodiment, the corner portions of both end portions in the longitudinal direction of the plate 2 are the held portions. And each inner wall face of engagement groove 41 serves as a contact possible part. That is, the four corner portions at both ends of the plate are held in contact with the inner wall surface which is the four contactable portions of the engagement groove 41. Here, the four contactable portions are the longitudinal direction contactable portion 42, the width direction contactable portion 43, and the two thickness direction contactable portions 44, 45. These four contactable parts restrict the movement of the plate in each direction. The width direction contactable portion 43 is a surface inclined at the same angle as the side surface of the corner portion which is the held portion of the plate.
[0017]
　Between the holdable portion of the plate 2 and each contactable portion (inner wall surface) of the engagement groove 41, as shown in FIGS. 2 and 3, the longitudinal direction, width direction and thickness of the plate 2 A gap of 5 mm on one side is set in each direction. Thus, the plate 2 can freely move in any direction (longitudinal direction, width direction and thickness direction of the plate) within the range of the gap, and the plate holding device 1 has a so-called copying mechanism.
[0018]
　Here, in the present embodiment, the setting of the gap in the longitudinal direction of the plate 2 is performed by adjusting the length by rotating the gap adjusting bolt 33 provided on the main body 32 of the parallel hand in FIG. That is, when the holding portions 4 move in the direction in which the holding portions 4 move close to each other, the movement can be stopped by the gap adjusting bolt 33 contacting the parallel claws 31. That is, since the gap adjustment 33 can adjust its projecting length by rotating, it becomes a control means for controlling the minimum distance between the two holding parts. The clearance adjusting bolt 33 is omitted in FIGS. 1 and 2.
[0019]
　Further, FIG. 3 is an explanatory view for explaining the state of the gap, and in the case where the plate is actually held by the plate holding device as shown in FIG. Is in contact with the inner wall surface (bottom surface) of the engagement groove 41. That is, in the present invention, the gap may be secured so that the holding portion of the plate can move in the longitudinal direction, the width direction, and the thickness direction of the plate. In addition, in the case of the present embodiment, since the gap of 5 mm on one side is set as described above, the plate can be moved in the range of 10 mm in the longitudinal direction, width direction and thickness direction. In other words, in the present embodiment, the size of the gap is 10 mm in the longitudinal direction, width direction and thickness direction of the plate. In the present invention, the size of the gap is preferably 2 mm or more and 20 mm or less.
[0020]
　The plate 2 can be easily attached to the plate storing metal frame 6 by the plate holding device 1 having the above configuration. Specifically, as shown in FIG. 3, the upper nozzle 8 is attached to the plate storage metal frame 6, and when the plate 2 is attached to the plate storage metal frame 6, the center of the opening of the upper nozzle 8 is And the center of the plate nozzle holes. Here, since the opening of the upper nozzle 8 has an inclined surface whose inner diameter is expanded toward the plate side, the inclined surface serves as a first guide, and the plate can be positioned. Furthermore, in the width direction, the side walls on both sides in the width direction of the plate storing metal frame 6 have inclined surfaces as a second guide, and the parallel side surfaces 208 (see FIG. 2) in the width direction of the plate are along the inclined surfaces. Is positioned. At this time, since the plate 2 is held by the holding portion 4 with a gap as described above, the center of the opening of the upper nozzle 8 and the center of the nozzle hole of the plate or the side wall of the plate housing metal frame 6 The holding portion of the plate 2 can move within the engagement groove 41 of the holding portion 4 even if the position of the parallel side surface 208 in the width direction of the plate and the plate is shifted. The position of the plate 2 is corrected and positioned at the correct position of. Once the plate 2 is attached to the plate storage frame 6, the plate does not come off by coming into contact with the magnet of the plate storage frame 6. The plate holding device 1 is removed and the four side surfaces of the plate 2 are fixed conventionally. It can be held in the plate storage frame 6 by a method.
[0021]
　Then, by attaching and operating the plate holding device 1 to the balancer or the articulated robot, the plate can be attached to the plate storing metal frame of the sliding nozzle device without the operator having the plate. In addition, parallel hands are generally sold widely, so they are inexpensive and available, and the plate holding device can be manufactured inexpensively.
[0022]
Second Embodiment
　FIG. 4 shows a plate holding apparatus according to a second embodiment of the present invention. The plate holding device 1 includes a parallel hand 3 as expansion / contraction means and a pair of (two) holding portions 4 attached to the parallel claws 32 of the parallel hand 3 and also a holding portion between the parallel claws 32. It has the pressing part 5 provided in the main-body part 32 by the side of four. Further, each holding portion 4 is substantially U-shaped in a plan view, and has two engaging grooves 41 at the end portions on both sides of the holding portion 4 respectively.
[0023]
　The plate 2 held by the plate holding device 1 has a metal back plate 203 on the back surface as shown in FIGS. 5 and 6, and the side surface is covered with a metal band 205, and is elongated from the back plate 203. Although the plate-shaped fixing | fixed part 209 is each provided in the direction and extended, these points are the same as the plate currently disclosed by patent document 3. FIG. Further, in the present embodiment, a plate-like engagement protrusion extending from the back plate 203 of the plate to both sides in the plane including the back plate 203 at right angles with respect to the longitudinal central axis of the plate. Two 210 are provided on one side, for a total of four. That is, the engagement protrusions 210 are provided at four places symmetrically with respect to the longitudinal central axis of the plate. Further, as shown in FIG. 6, the engagement protrusions 210 each have a corner portion 211 that is perpendicular to the side opposite to the nozzle hole 202. The back plate 203, the fixing portion 209, and the engagement protrusion 210 in the present embodiment are manufactured by processing a single iron plate having a thickness of 4 mm.
[0024]
　In addition, the engaging groove 41 of the holding portion 4 has a total of four contactable portions on the outer side in the width direction of the plate 2, the outer side in the longitudinal direction of the plate 2, and both sides in the thickness direction of the plate. There is. Specifically, as shown in FIG. 6 and FIG. 7, they are the longitudinal direction contactable portion 42, the width direction contactable portion 43, and the thickness direction contactable portions 44 and 45. Also, these contactable portions are provided as four inner wall surfaces facing the surface of the engaging protrusion 210 respectively. The four inner wall surfaces can cover the two side surfaces of the corner portion 211 of the engagement protrusion 210 and the four surfaces of the upper surface and the lower surface.
[0025]
　Further, the pair of holding portions 4 approaches and separates in the longitudinal direction (sliding direction) of the plate 2 by the operation of the parallel hand 3 as in the first embodiment, but when holding the plate 2 as shown in FIG. As shown in FIG. 7, a clearance is secured between the engagement protrusion 210 and the abuttable portion which is the inner wall surface of the engagement groove 41. Specifically, a gap between the longitudinally contactable portion 42 of the engagement groove 41 and the engagement protrusion 210 (a gap in the longitudinal direction of the plate), a width direction contactable portion 43 of the engagement groove 41 and the engagement protrusion A gap (a gap in the width direction of the plate) 210 and a gap (a gap in the thickness direction of the plate) between the thickness direction contactable portions 45 and 46 of the engaging groove 41 and the engaging projection 210 are provided. A gap of 5 mm on one side is set.
[0026]
　By providing the gap in this manner, the plate 2 can be moved in any direction (longitudinal direction, width direction and thickness direction of the plate) within the range of the gap, so that the manufacturing dimensions of the plate 2 vary. Also, the plate can be accurately positioned on the metal frame.
[0027]
　Next, the pressing portion 5 will be described. As shown in FIG. 8, four bolts 55 are fixed to the substrate 51 through the four through holes 56 of the holding plate 53 and the four coil springs 54 respectively. The substrate 51 is attached to the main body 32 of the parallel hand 3. A clearance is provided in the holding plate 53 to fix the holding plate 52, and the holding plate 53 and the holding plate 52 are integrated. Then, the pressing plate 52 can move to the side of the substrate 51 to bend the coil spring 54. At this time, by providing a gap between the through hole 56 of the holding plate 53 and the bolt 55, the pressing plate 52 can move even in the inclined state. The position of the presser plate 52 is set to a position where the coil spring 54 bends when the plate is held by the holding portion 4 (engagement groove 41). As a result, the plate is a plate storage metal frame of the engagement groove 41. It will be in the state where it was pressed against the inner wall of the side.
[0028]
　The state which attached the plate to the plate storage metal frame in a present Example in FIG. 9 is shown. The plate storage frame 6 has two guide protrusions 61 for guiding the two fixing portions 209 of the plate and a fitting protrusion (see FIG. 5) for fitting the fitting recess 211 (see FIG. 5) of the plate. However, these features are the same as in Patent Document 3. The guide projections 61 of the plate housing frame 6 are cylindrical at the base end side and frusto-conical at the front end side.
[0029]
　Next, in the present embodiment, the procedure for mounting the plate on the plate storing metal frame will be described in the case where the plate holding device is held by the balancer. The plate 2 is placed with the sliding surface up, and the plate is held by the plate holding device 1 held by the balancer. At this time, since the plate is lightly pressed against the thickness direction contactable portion 44 by the pressing portion 5, the plate 2 secures a gap between the outer side in the plate longitudinal direction of the engaging projection 210 and the outer side in the plate width direction. Can be held by Next, the plate holding device 1 is moved in the direction of the plate storage frame, and the plate 2 is visually fitted to the guide projection 61 of the plate storage frame 6 by fitting the opening 209 a of the fixing portion 209 of the plate 2. The plate storage metal frame is moved in the vertical direction with respect to the plate storage metal frame 6. At first, the openings 209a of the fixing portions 209 at both ends of the plate 2 are guided by the inclined surfaces of the truncated cones of the two guide protrusions 61 of the plate storing metal frame 6, but at this time the plate held by the plate holding device 1 2 can be moved in an arbitrary direction within the range of the gap as described above, so it moves along the inclined surface of the guide projection 61. Further, at this time, since the plate 2 is pressed and held in the direction of the plate storing metal frame by an appropriate pressing force by the pressing portion 5, the plate 2 is prevented from applying an excessive force to the plate 2. It can be moved smoothly by being guided by the guide protrusion 61 in the width direction and the longitudinal direction. When the plate holding device 1 is further moved in the direction of the plate storing metal frame, the opening 209a of the fixing portion 209 of the plate 2 is fitted to the cylindrical portion of the guide projection 61, and the fixing portion 209 of the plate 2 is the plate storing metal frame 6 High precision positioning is achieved by contacting the bottom of the. That is, the fitting convex portion of the plate housing metal frame 6 is fitted into the fitting concave portion 211 of the plate, and the plate 2 is reliably attached to the plate housing metal frame 6 with high positional accuracy. As described above, also in the plate holding device 1 of the present embodiment, the plate 2 moves in an arbitrary direction within the range of the gap and has the copying mechanism capable of correcting the position.
[0030]
　Further, in the present embodiment, the engaging projection 210 protruding from the side surface of the plate is used as the held portion of the plate, and the engaging projection 210 as the held portion of the plate is used at the time of manufacture of the plate body (refractory plate). It can be provided with high dimensional accuracy, without being affected by the dimensional variation of. Also, although the holding portion 4 of the plate holding device 1 moves in the longitudinal direction of the plate, as shown in FIG. 9, since the plate storage metal frame 6 originally has a space in the longitudinal direction of the plate, the space where the holding portion 4 moves It is not necessary to provide it, and the plate storage frame 6 can be kept compact. Furthermore, in the present embodiment, since the engagement protrusions 210 as the holding portions of the plate are provided at four places symmetrically with respect to the central axis in the longitudinal direction of the plate, the plate 2 can be inserted into the plate storage frame 6 The inclination of 2 can be made small and it can insert smoothly. Further, by making the engaging projection 210 into a plate shape extended from the back plate 203 of the plate, it can be manufactured simultaneously with the manufacture of the back plate 203, so that the manufacturing dimensional accuracy becomes high and the manufacturing can be simplified. it can. The back plate 203, the plate-like engagement protrusion 210, and the fixing portion 209 can be made of an iron plate having a thickness of 1 to 7 mm.
[0031]
　Further, in the present embodiment, the engaging projection 210 has a corner portion 211 perpendicular to the longitudinal central axis of the plate on the side opposite to the nozzle hole of the plate, and the two holding portions of the plate holding device 4 is adapted to expand and contract in the longitudinal direction of the plate. As a result, the overlapping area between the engagement protrusion 211 and the abutable portion can be maximized with the minimum expansion and contraction stroke of the holding portion 4. As a result, the space in which the holding portion 4 moves in the plate storage frame can be minimized, and the plate storage frame can be made compact. Furthermore, even with the existing plate storage frame, significant modification is required. It becomes possible to adopt the present invention without.
[0032]
　Here, the plate 2 attached to the plate storage frame 6 is held by the lock mechanism 7 shown in FIGS. 9 and 10 so as not to drop from the plate storage frame 6. That is, the lock mechanism 7 has a pair of holding blocks 71 at the tip of the pair of bolts 75, and the holding block 71 has an inclined surface 72 inclined so as to open toward the sliding surface side of the plate, and the plate It has the inclined surface 73 which inclines so that it may be opened toward the bottom side of a storage metal frame. Further, the holding block 71 is held by a coil spring 74 so as to be movable in a direction parallel to the bottom surface of the plate storing metal frame and perpendicular to the longitudinal central axis.
[0033]
　When the plate is pressed against the plate storage frame 6, the fixing portion 209 is pressed against the plate storage frame 6 along the inclined surface 72, so that the pair of holding blocks 71 is opened and the fixing portion 209 is between the pair of holding blocks 71. It is fixed by holding. On the other hand, when the plate is removed from the plate storage frame 6, by moving the fixing portion 209 along the inclined surface 73, the pair of holding blocks 71 can be opened and the plate can be removed.
[0034]
　In addition, although the engaging protrusion 210 was made into plate shape in the present Example, it can be made arbitrary shapes, such as a cylinder and a square pillar besides this.
[0035]
　Further, in the plate holding device 1 of the present embodiment, the distance between the thickness direction contactable portion 44 and the thickness direction contactable portion 45 and the angle of the width direction contactable portion 43 are adjusted. One plate of Example 1 can be held. Furthermore, conventional common plates can also be held. It is also possible to provide the contactable portion of the plate holding device as a hemispherical projection.
[0036]
Third Embodiment
　FIG. 11 shows a plate used in a third embodiment of the present invention. In this third embodiment, the same plate holding device 1 as that of the second embodiment is used, but the shape of the plate, specifically the position of the engagement projection 210, is different from that of the second embodiment. That is, in the present embodiment, two engaging projections 210 in total, two in each of both end portions in the longitudinal direction of the back plate 203 are provided. The engaging projection 210 of the third embodiment is also in the form of a plate extending from the back plate 203 as in the second embodiment, and provided symmetrically about the longitudinal central axis of the plate. Further, the engagement projection 210 has a corner portion 211 perpendicular to the longitudinal central axis of the plate on the opposite side to the nozzle hole of the plate.
Explanation of sign
[0037]
　DESCRIPTION 　OF SYMBOLS 1 plate holding apparatus
2 plate
　201 fireproof plate
　202 nozzle hole
　203 back plate
　204 opening
　205 metal band
　206 sliding surface
　207 protruding side
208 parallel side surface
　209 of a width direction fixing part
209a opening
　210 engaging
　part 211 engagement　 part 211 corner part
　212 fitting Joint recess
　3 Parallel hand (expansion and contraction means)
　31 Parallel claw
　32 Body part
　33 Clearance adjustment bolt
　34 Rod
4 Holding part
　41 Engaging groove
　42 Longitudinal abutable part
　43 Width direction abuttable part
　44 Thickness direction abuttable part
　45 Thickness direction contactable portion
5 Pressing portion
　51 Substrate
　52 Holding plate
　53 Holding plate
　54 Coil spring
　55 Bolt
　56 Through hole
6 Plate storage metal frame
　61 Guide projection
7 Locking mechanism
　71 Holding block
　72, 73 Inclined surface
　74 Coil spring
　75 Bolt
8 Upper nozzle
The scope of the claims
[Claim 1]
　For mounting with the positioning along the plate to the plate receiving metal frame of the sliding nozzle device to guide the plate along the guide is a plate holding device for holding the plate so as to be movable,
　the plate A plurality of holding portions having engaging grooves for engaging with the holding portions, and expansion / contraction means for expanding and contracting the intervals between the plurality of holding portions, and the holding portions
　of the plate are engaged with the engaging grooves. The plate holding device, wherein the engaging groove has a gap in which the plate can move in the longitudinal direction, width direction and thickness direction of the plate when holding the plate.
[Claim 2]
　The plate holding device according to claim 1, wherein the plurality of holding portions face each other in parallel, and the expansion / contraction means expands / contracts an interval between the plurality of holding portions while maintaining the plurality of holding portions in parallel.
[Claim 3]
　The plate holding | maintenance apparatus of Claim 1 or 2 which has a pressing part for pressing a plate in a plate storage metal frame direction.
[Claim 4]
　The number of the plurality of holding portions is two, and one engaging groove is provided on each side of each holding portion, for a total of four in two holding portions, and
　further, between the two holding portions. The plate holding device according to claim 1, 2 or 3, further comprising control means for controlling the minimum distance.
[Claim 5]
　5. The plate holding device according to claim 4, wherein the expansion and contraction means expand and contract the distance between the two holding portions in the longitudinal direction of the plate.
[Claim 6]
　The said engaging groove is comprised by a total of four contactable parts of the outer side of the width direction of a plate, the outer side of the longitudinal direction of a plate, and the both sides of the thickness direction of a plate. The plate holding device according to any one of the above.
[Claim 7]
　A plate held by the plate holding device according to any one of claims 1 to 6, wherein the holding portion has an engagement protrusion that protrudes from a side surface of the plate.
[Claim 8]
　The plate according to claim 7, wherein the engagement protrusions are provided in four places symmetrically with respect to a longitudinal central axis of the plate.
[Claim 9]
　The plate according to claim 7, wherein the engagement protrusion is in the form of a plate extended from a back plate of the plate.
[Claim 10]
　10. The plate according to claim 7, 8 or 9, wherein the engagement protrusion has a corner perpendicular to the central longitudinal axis of the plate on the side opposite to the nozzle hole of the plate.
[Claim 11]
　A plate holding method for holding a plate by a plate holding device such that the plate can be moved along the guide in order to mount the plate along a guide while positioning the plate on a metal frame of a sliding nozzle device. Te,
　the plate holding device, and a plurality of holding portions having engagement groove for engaging the held portion of the plate, and a scaling means for scaling the spacing between the plurality of holding portions provided,
　the engagement When holding the plate by engaging the holding portion of the plate with the groove, the plate is provided in the longitudinal direction, width direction and thickness direction of the plate between the holding portion of the plate and the inner wall surface of the engagement groove. How to hold the plate, ensuring clearance to allow movement.