Specification
Title of invention: Belt-shaped belt, endless belt, and manufacturing method thereof
TECHNICAL FIELD The present invention relates to a belt-shaped belt, an endless belt, and a method for manufacturing the belt.
Background technology
[0002]
　Endless belts are used as conveyor belts in conveyor devices such as financial terminal devices, automatic ticket gates, and ticket vending machines. As this endless belt, for example, a belt made of a reinforcing material such as a fiber material (for example, knitted cloth) and a thermosetting resin such as rubber is disclosed (for example, Patent Document 1).
Prior art documents
Patent literature
[0003]
Patent Document 1: Japanese Patent Laid-Open No. 2016-038010
Summary of the invention
Problems to be Solved by the Invention
[0004]
　For example, in order to replace the endless belt used in the carrier of the automatic ticket gate, it is necessary to remove the carrier from the automatic ticket gate, replace the belt, and then reattach the carrier to the automatic ticket gate. It takes a lot of work time and makes the work complicated. If the endless belt can be cut and formed into a strip shape and attached to the conveying device and then returned to the endless shape, the belt replacement operation can be simplified. However, since the endless belt used in the conveying device as disclosed in the above-mentioned Patent Document 1 is mainly made of a thermosetting resin, it is necessary to bond the thermosetting resins to each other in order to cut them and then rejoin them. There is a problem that the work is complicated because a part is required.
[0005]
　When replacing the endless belt used in the carrier, the carrier must be stopped while the belt is being replaced. Therefore, it is desired that the work time for exchanging the belt is as short as possible. In addition, the endless belt made by fusing the thermoplastic resin after replacement has a durability that the boundary between the thermosetting resin and the thermoplastic resin deteriorates earlier than the seamless belt formed of the thermosetting resin, which is durable. There is a concern that it will be inferior.
[0006]
　An object of the present invention is to provide a belt belt, an endless belt, and a method for manufacturing the belt belt, which can be easily joined at a site where the belt is used and can suppress deterioration of durability.
Means for solving the problems
[0007]
　The method for manufacturing a belt-shaped belt according to the present invention is a belt-shaped thermoplastic resin sheet formed of a thermoplastic resin on a mold surface and serving as a bonding portion, unvulcanized rubber, the unvulcanized rubber and the thermoplastic resin. A laminate forming step for obtaining an unvulcanized laminate by arranging an unvulcanized rubber sheet, which comprises a resin and a cross-linking agent covalently bonded to form a belt body, in a state where the end portions are in contact with each other; And a vulcanization molding step of vulcanizing and molding the vulcanized laminate.
[0008]
　The method for manufacturing an endless belt according to the present invention includes a step of attaching the belt-like belt to the conveyor and then fusing the first joining portion and the second joining portion to form an endless belt.
[0009]
　A belt-shaped belt according to the present invention includes a belt-shaped belt body formed of vulcanized rubber, a first coupling portion provided at one end of the belt body, and a second coupling portion provided at the other end of the belt body. At least one thermoplastic resin sheet, which is made of a thermoplastic resin and serves as the first bonding portion and the second bonding portion, an unvulcanized rubber, the unvulcanized rubber and the thermoplastic resin. And a cross-linking agent that is covalently bonded to the unvulcanized rubber sheet that becomes the belt main body, in a state where the end portion of the thermoplastic resin sheet and the end portion of the unvulcanized rubber sheet are in contact with each other, and vulcanization molding is performed. Get it.
[0010]
　An endless belt according to the present invention includes a belt-shaped belt body formed of vulcanized rubber, and a joint portion provided between both ends of the belt body, and is formed of a thermoplastic resin, and the joint portion A thermoplastic resin sheet that becomes, an unvulcanized rubber, and a cross-linking agent that covalently bonds to the unvulcanized rubber and the thermoplastic resin, and an unvulcanized rubber sheet that becomes the belt body, the thermoplastic It is obtained by vulcanization molding with the end portion of the resin sheet and the end portion of the unvulcanized rubber sheet in contact with each other.
Effect of the invention
[0011]
　According to the present invention, since the joining portion is provided in the belt main body in advance, the endless belt can be obtained by joining at one place. Therefore, the belt belt is easily joined at the site where it is used. be able to. Since the thermoplastic resin and the vulcanized rubber are chemically bonded to the bonding portion and the belt body, the bonding portion and the belt body are bonded more firmly. Therefore, the belt-shaped belt and the endless belt can suppress deterioration in durability.
Brief description of the drawings
[0012]
FIG. 1 is a perspective view showing a belt-shaped belt according to a first embodiment.
FIG. 2 is an enlarged vertical sectional view of an end portion of the belt belt according to the first embodiment.
FIG. 3 is a perspective view showing a winding step in the method for producing an endless belt, FIG. 3A is a stage in which a reinforcing sheet is wound, FIG. 3B is a stage in which a thermoplastic resin sheet is arranged, and FIG. 3C is an unvulcanized rubber sheet. It is a figure which shows the stage wound.
FIG. 4 is a perspective view showing a vulcanized laminate obtained in a vulcanization molding step in the method for producing an endless belt.
FIG. 5 is a perspective view showing the vulcanized laminate after the polishing step in the method for producing an endless belt.
FIG. 6 is a perspective view showing an endless belt according to the first embodiment.
FIG. 7 is an enlarged vertical cross-sectional view of a joint portion when the belt-shaped belt according to the first embodiment is an endless belt.
FIG. 8 is a cross-sectional view showing a sample used in a tensile test, FIG. 8A being an example and FIG. 8B being a comparative example.
FIG. 9 is a partial cross-sectional view used for explaining the second embodiment, FIG. 9A is a belt-shaped belt, FIG. 9B is an endless belt, and FIG. 9C is a partial cross-sectional view showing a vulcanized laminate at the manufacturing stage.
FIG. 10 is a partial cross-sectional view used for description of the third embodiment, FIG. 10A is a belt-shaped belt, FIG. 10B is an endless belt, and FIG. 10C is a partial cross-sectional view showing a vulcanized laminate at a manufacturing stage.
FIG. 11 is a perspective view showing a modified example of the method for manufacturing the belt-shaped belt according to the first embodiment.
MODE FOR CARRYING OUT THE INVENTION
[0013]
　Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0014]
1. First Embodiment
(Overall Structure) The
　belt-shaped belt 10A shown in FIG. 1 is a flat belt having a flat surface and not yet endless. The belt-shaped belt 10A includes a belt body 12, a first coupling portion 14A provided on a first end surface 13 which is one end in the longitudinal direction of the belt body 12, and a second end surface 15 which is the other end in the longitudinal direction of the belt body 12. And a second coupling portion 16A provided in the. The belt body 12 is a belt-shaped member made of vulcanized rubber such as millable urethane, hydrogenated nitrile rubber (H-NBR), ethylene propylene diene rubber (EPDM), ethylene propylene rubber (EPM), and chlorosulfonated polyethylene. Is. In the case of the present embodiment, the joint surface between the first end surface 13 and the first joint portion 14A and the joint surface between the second end surface 15 and the second joint portion 16A are both flat. The first tip portion 17 that is the tip of the first coupling portion 14A and the second tip portion 19 that is the tip of the second coupling portion 16A are both flat.
[0015]
　The first joint portion 14A and the second joint portion 16A are plate-shaped members formed of a thermoplastic resin such as urethane elastomer, polyamide elastomer, polyester elastomer, polyvinyl chloride elastomer, or polyolefin elastomer. The width length of the first coupling portion 14A and the second coupling portion 16A is the same as the width length of the belt body 12.
[0016]
　The vulcanized rubber of the first end surface 13 and the second end surface 15 and the thermoplastic resin of the first bonding portion 14A and the second bonding portion 16A are chemically bonded, so that the first end surface 13 and the second end surface 15 are Bonding is stronger than bonding by heat fusion.
[0017]
　As shown in FIG. 2, the belt-shaped belt 10A includes a reinforcing cloth 18, on the reinforcing cloth 18, the belt main body 12, a first connecting portion 14A connected to the first end surface 13 of the belt main body 12, The second coupling portion 16A coupled to the second end surface 15 is laminated. The belt-shaped belt 10A is formed of two layers as a whole, in which the reinforcing cloth 18 is arranged on one surface and the belt main body 12, the first connecting portion 14A and the second connecting portion 16A are arranged on the other surface. The reinforcing cloth 18 gives durability to the belt-shaped belt 10A. Examples of the material of the reinforcing cloth 18 include woven cloth and knitted cloth such as polyester fiber, nylon fiber, aramid fiber, glass fiber, carbon fiber, and cotton. The thickness of the fibers forming the reinforcing cloth 18 is not particularly limited and is, for example, about 70 to 280 T (decitex).
[0018]
(Manufacturing Method)
　Next, a method of manufacturing the belt-shaped belt 10A and the endless belt will be described. First, a rubber composition that is a raw material for the belt body 12 is prepared. An unvulcanized rubber to be a vulcanized rubber, a cross-linking agent that covalently bonds to the unvulcanized rubber and the thermoplastic resin, a hydrolysis inhibitor, and other additives are added if necessary and mixed. Using the rubber composition thus obtained, an unvulcanized rubber sheet is produced by a calendar device. The size of the unvulcanized rubber sheet is adjusted to the size of the reinforcing sheet described later. Here, the covalent bond means a bond in which two atoms share an electron, and has a sigma bond and/or a pi bond. More specifically, the cross-linking agent covalently bonds with the functional group of the unvulcanized rubber and the functional group of the thermoplastic resin.
[0019]
　Crosslinking agents, peroxides, for example, dicumyl peroxide, tertiary butyl peroxide, tertiary butyl cumyl peroxide, 1,1-di (tertiary butylperoxy)-3,3,5-trimethylcyclohexane, 2,5-Dimethyl-2,5-di(tertiary butylperoxy)hexane, 2,5-Dimethyl-2,5-di(tertiary butylperoxy)hexyne-3,1,3-di(tertiary 3 Butylperoxyisopropyl)benzene, 2,5-dimethyl-2,5-di(benzoylperoxy)hexane, tert-butylperoxybenzoate, tert-butylperoxyisopropyl carbonate, n-butyl-4,4-di( Tertiary butylperoxy)valerate can be used. The unvulcanized rubber sheet 26 preferably contains 2 to 10 parts by weight of the crosslinking agent with respect to 100 parts by weight of unvulcanized rubber.
[0020]
　Next, the reinforcing sheet 22 which becomes the reinforcing cloth 18 is wound around the surface of the cylindrical drum 20 as a mold (FIG. 3A). The reinforcing cloth 18 is an endless shape having a size (peripheral length) that does not come off the mold. Next, a strip-shaped thermoplastic resin sheet 24 formed of the thermoplastic resin and serving as the first coupling portion 14A and the second coupling portion 16A is arranged on the surface of the reinforcing sheet 22 in the axial direction of the drum 20. (Fig. 3B).
[0021]
　Next, the unvulcanized rubber sheet 26 is wound to form an unvulcanized laminate 28 (FIG. 3C). The unvulcanized rubber sheet 26 is arranged on the reinforcing sheet 22 and on the same surface as the thermoplastic resin sheet 24. The unvulcanized rubber sheet 26 does not necessarily completely cover the surface of the thermoplastic resin sheet 24 if it covers the exposed reinforcing sheet 22 in the circumferential direction and is in contact with the widthwise end portion of the thermoplastic resin sheet 24. You don't have to. In the case of this figure, the end portion of the unvulcanized rubber sheet 26 is arranged so as to overlap the width direction end portion of the thermoplastic resin sheet 24. Here, the end portion includes an end face and a constant region in a direction perpendicular to the end face.
[0022]
　Next, the unvulcanized laminate 28 is vulcanized and molded under the condition of heating and pressing. The heating temperature may be, for example, about 150 to 180°C. After a lapse of a predetermined time, it is cooled, and the bonding layer 32 in which the thermoplastic resin is solidified and the belt main body layer 30 in which the vulcanized rubber is solidified are provided on the reinforcing sheet 22 (not shown in the drawing) shown in FIG. A vulcanized laminate 34A having the above is obtained. In the vulcanized laminate 34A, the unvulcanized rubber sheet 26 is vulcanized by the crosslinking agent, and the vulcanized rubber and the thermoplastic resin are chemically bonded via the crosslinking agent. In the vulcanized laminate 34A, the portion where the bonding layer 32 is provided is formed with a ridge 35A that projects in the radial direction in the axial direction.
[0023]
　Then, the outer periphery of the vulcanized laminate 34A is polished to remove the ridges 35A (FIG. 5). The endless belt 38 shown in FIG. 6 can be obtained by cutting the vulcanized laminate 36 obtained as described above into a ring with a predetermined width. In the endless belt 38, the first end surface 13 and the second end surface 15 of the belt body are joined via the joining portion 40A. The endless belt 38 obtained as described above is called a primary endless belt.
[0024]
　In the above primary endless belt, the joint portion 40A is cut in the thickness direction, and the joint portion 40A is separated into the first joint portion 14A and the second joint portion 16A to obtain the belt-shaped belt 10A shown in FIG. .. In the belt-shaped belt 10A, any surface of the belt body 12 and the reinforcing cloth 18 may be used as the surface of the belt (for example, a transportation surface when used as a transportation belt).
[0025]
(Usage Method)
　Next, a method of making the belt-shaped belt 10A an endless belt will be described. First, the first end surface 13 and the second end surface 15 are arranged on the upper surface of a lower mold (not shown) with the first tip 17 and the second tip 19 abutted against each other. The first coupling portion 14A and the second coupling portion 16A are arranged in a state in which the first tip portion 17 and the second tip portion 19 are in contact with each other, or in a state in which a part thereof overlaps in the thickness direction. Then, the upper mold is placed on the first coupling portion 14A and the second coupling portion 16A, and heated while being pressed in the thickness direction by a pressing body (not shown) for a certain period of time. Then, the first joint portion 14A and the second joint portion 16A are melted and fluidized.
[0026]
　Next, by cooling the lower die and the upper die, the first joint portion 14A and the second joint portion 16A are solidified, and the joint portion 40A is formed as shown in FIG. As described above, the first end surface 13 and the second end surface 15 are joined together via the joining portion 40A to form the endless belt 42A. As shown in FIG. 7, the first joint portion 14A and the second joint portion 16A are fused and integrated to form a joint portion 40A. The reinforcing cloth 18 is integrated with the permeating thermoplastic resin of the first connecting portion 14A and the second connecting portion 16A.
[0027]
　As described above, the first coupling portion 14A and the second coupling portion 16A can be integrated again by abutting and fusing the first tip portion 17 and the second tip portion 19 together. The endless belt 42A formed by re-integrating the first joining portion 14A and the second joining portion 16A thus separated to obtain the joining portion 40A is called a secondary endless belt (FIG. 7). The primary endless belt and the secondary endless belt are common in that the first end surface 13 and the second end surface 15 of the belt body 12 are joined via the joining portion 40A.
[0028]
(Operation and effect) In
　the case of the present embodiment, since the first coupling portion 14A and the second coupling portion 16A are provided in the belt body 12 in advance, there is one location between the first coupling portion 14A and the second coupling portion 16A. The endless belt 42A can be obtained by coupling the Therefore, since the number of connecting points can be only one, the belt-shaped belt 10A can be easily joined at the site where it is used.
[0029]
　Since the thermoplastic resin and the vulcanized rubber are chemically bonded, the bonding portion 40A and the belt body 12 are more firmly bonded. Therefore, the endless belt 42A can suppress deterioration of durability.
[0030]
　Since the reinforcing cloth 18 is adhered to the thermoplastic resin of the joining portion 40A, the joining portion 40A and the belt body 12 are joined more firmly.
[0031]
　An endless belt having a cross-sectional shape shown in FIG. 8A was manufactured by the same procedure as the above manufacturing method, and the tensile strength was measured. As the reinforcing cloth 18, an endless knitted cloth made of polyester fiber was used. The belt body 12 was composed of millable urethane as an unvulcanized rubber and dicumyl peroxide as a cross-linking agent in an amount of 4.0 parts by weight per 100 parts by weight of the millable urethane. 40 A of joint parts used thermoplastic polyurethane as a thermoplastic resin. Vulcanization was performed at 170° C. to produce an endless belt having a thickness of 0.8 mm, a width of 10 mm, a peripheral length of 350 mm, and a length of the joint 40A in the belt longitudinal direction of 100 mm.
[0032]
　For comparison, an endless belt having a cross-sectional shape shown in FIG. 8B was produced. The endless belt of the comparative example uses the same material as that of the endless belt according to the embodiment, and includes a reinforcing cloth 18 and a belt main body 12 provided on the reinforcing cloth 18 and made of vulcanized rubber. The ends of the belt body 12 and the reinforcing cloth 18 are joined together by the fusion-bonding portion 46. The end portions of the belt main body 12 and the fusion bonding portion 46 are joined by heating, melting, and cooling and solidifying the thermoplastic resin sheet 24 arranged between the end portions of the belt main body 12 after vulcanization. Therefore, the vulcanized rubber of the belt body 12 and the thermoplastic resin of the fused portion 46 are not chemically bonded.
[0033]
　A tensile tester (manufactured by Shimadzu Corporation, Autograph AGS-2000B) was used for the breaking test. The breaking strength when the endless belt sample was pulled in the length direction at a constant pulling rate by a tensile tester was measured using a load cell with a capacity of 1 kN. In the case of the example, the pulling speed was constant at 350 mm/min. In the case of the comparative example, the pulling speed was 26.3 mm/min up to a displacement of 50 mm, and 263 mm/min from a displacement of over 50 mm. The measurement temperature was 25° C., 40° C., 60° C., and 80° C., and the tensile test was performed after the sample was left in the corresponding temperature environment for 1 hour. Table 1 shows the judgment strength index obtained from the measured breaking strength. The breaking strength index was calculated by the following calculation formula. The larger the index, the better the breaking strength.
(Breaking strength index)=(Breaking strength of Examples)/(Breaking strength of Comparative Examples)×100
[0034]
[table 1]

[0035]
　The breaking strength used to calculate the breaking strength index was an average value of three measured values ​​in the example and four measured values ​​in the comparative example. From this table, it was confirmed that the breaking strength of the example was higher than that of the comparative example under all conditions. Regarding the endless belts of Examples, the belt body was broken except for one at 80°C. From this, it is considered that the endless belts of Examples had higher breaking strength because the belt body and the joint were more strongly bonded by chemical bonding. On the other hand, the endless belts of Comparative Examples are both fractured between the belt body and the joint portion, and the joint strength between the belt body and the joint portion joined by fusion bonding is inferior to the belt body. It is considered that the strength was lower than that of the example.
[0036]
2.
　Second Embodiment Next, a second embodiment will be described with reference to FIGS. 9A to 9C. The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. The belt-shaped belt 10B shown in FIG. 9A includes a reinforcing cloth 18, a belt body 12, a first joint portion 14B, and a second joint portion 16B. The first joint portion 14B is joined to the first end surface 37 of the belt body 12 at the first joint surface 21. The second joint portion 16B is joined to the second end surface 39 of the belt body 12 at the second joint surface 23. The first joint surface 21 and the second joint surface 23 are tapered so that the thickness thereof gradually decreases toward the ends. In the case of this figure, the 1st joint surface 21 and the 2nd joint surface 23 are taper-shaped which inclines toward the said reinforcement cloth 18 toward an edge part.
[0037]
　The first tip portion 17 and the second tip portion 19 are fused and integrated to form a joint portion 40B as shown in FIG. 9B. The first end surface 37 and the second end surface 39 are joined via the joining portion 40B to form an endless belt 42B.
[0038]
　The belt-shaped belt 10B and the endless belt 42B of this embodiment can be manufactured by the same procedure as the procedure described in “(Manufacturing Method)” of the first embodiment. That is, a reinforcing sheet that serves as the reinforcing cloth 18 is wound around the surface of the cylindrical drum 20 as a mold. Next, a strip-shaped thermoplastic resin sheet formed of the thermoplastic resin and serving as the first connecting portion 14B and the second connecting portion 16B is arranged on the surface of the reinforcing sheet in the axial direction of the drum. The long side of the strip-shaped thermoplastic resin sheet has a taper shape in which the thickness gradually decreases toward the end and is inclined toward the reinforcing sheet.
[0039]
　Next, the unvulcanized rubber sheet is wound to form an unvulcanized laminate. Next, the unvulcanized laminate is vulcanized and molded under the condition of heating and pressing. After a lapse of a predetermined time, it is cooled to obtain a vulcanized laminate 34B having the binding layer 25 in which the thermoplastic resin is solidified and the belt body layer 30 in which the vulcanized rubber is solidified on the reinforcing sheet 22 (FIG. 9C). In the vulcanized laminate 34B, the unvulcanized rubber sheet is vulcanized by the crosslinking agent, and the vulcanized rubber and the thermoplastic resin are chemically bonded via the crosslinking agent. In the vulcanized laminate 34B, the portion where the bonding layer 25 is provided is formed with a ridge 35B protruding in the radial direction over the axial direction.
[0040]
　Then, the outer periphery of the vulcanized laminate 34B is ground to the position C in the figure to remove the ridge 35B. A primary endless belt can be obtained by cutting the vulcanized laminate 34B obtained as described above into a ring with a predetermined width. In the primary endless belt, the first end surface 37 and the second end surface 39 of the belt body 12 are joined via the joining portion 40B. In the primary endless belt obtained as described above, the joint portion 40B is cut in the thickness direction, and the joint portion 40B is separated into the first joint portion 14B and the second joint portion 16B. The belt-shaped belt 10B shown can be obtained.
[0041]
　The belt-shaped belt 10B and the endless belt 42B of the present embodiment have the same effect as that of the first embodiment because the thermoplastic resin and the vulcanized rubber are chemically bonded. Further, in the case of the present embodiment, the first joint surface 21 and the second joint surface 23 are tapered so as to incline toward the reinforcing cloth 18 toward the end portion, and therefore, the first joint portion 14B and the second joint portion 16B. The joining area between the first end surface 37 and the second end surface 39 of the belt body 12 increases. Therefore, the belt-shaped belt 10B and the endless belt 42B can further improve the breaking strength.
[0042]
　In the case of the second embodiment, the case where the first joint surface 21 and the second joint surface 23 are tapered so as to incline toward the reinforcing cloth 18 toward the end has been described, but the present invention is not limited to this. Absent. Even if the first joint surface 21 and the second joint surface 23 have a taper shape in which the inclination direction is opposite to that of the configuration shown in FIGS. Good. In this case, the long side of the strip-shaped thermoplastic resin sheet used in the manufacturing process has a taper shape in which the thickness gradually decreases toward the end and is inclined in a direction away from the reinforcing sheet. The long side of the unvulcanized rubber sheet has a tapered shape complementary to the long side of the thermoplastic resin sheet. That is, the long side of the unvulcanized rubber sheet has a taper shape in which the thickness gradually decreases toward the end and is inclined toward the reinforcing sheet. A vulcanized laminate in which a vulcanized rubber and a thermoplastic resin sheet are chemically bonded by placing a thermoplastic resin sheet between the long sides of an unvulcanized rubber sheet and vulcanizing and molding under heat and pressure conditions. Is obtained. A primary endless belt can be obtained by cutting the vulcanized laminate into a ring having a predetermined width. The belt-shaped belt and the endless belt thus obtained have the same joining area with the first end surface and the second end surface of the belt body, and therefore, the same effect as the second embodiment can be obtained.
[0043]
　3. Third Embodiment
　Next, a third embodiment will be described with reference to FIGS. 10A to 10C. The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. A belt-shaped belt 10C shown in FIG. 10A includes a reinforcing cloth 18, a belt body 29, a first joint portion 14A, and a second joint portion 16A. One end of the belt body 29 covers the first end surface 13 that contacts the end of the first coupling portion 14A and the surface (one side surface) of the first coupling portion 14A opposite to the surface that contacts the reinforcing cloth 18, A first extension 31 is formed by extending a part of the belt body 29. The other end of the belt body 29 covers the second end surface 15 that contacts the end of the second coupling portion 16A and the surface (one side surface) opposite to the surface of the second coupling portion 16A that contacts the reinforcing cloth 18. A second extension 33 is formed by extending a part of the belt body 29.
[0044]
　By fusion-bonding the first tip portion 17 and the second tip portion 19 into one body, a coupling portion 40A is formed as shown in FIG. 10B. One end including the first end face 13 and the other end including the second end face 15 are joined via the joining portion 40A to form an endless belt 42C. The tips of the first extension portion 31 and the second extension portion 33 are in contact with each other.
[0045]
　The belt-shaped belt 10C and the endless belt 42C of the present embodiment can be manufactured by the same procedure as the procedure described in “(Manufacturing Method)” of the first embodiment. That is, a reinforcing sheet that serves as the reinforcing cloth 18 is wound around the surface of a cylindrical drum as a mold. Next, a strip-shaped thermoplastic resin sheet formed of the thermoplastic resin and serving as the first coupling portion 14A and the second coupling portion 16A is arranged on the surface of the reinforcing sheet and in the axial direction of the drum. The thickness of the strip-shaped thermoplastic resin sheet is smaller than the thickness of the unvulcanized rubber sheet.
[0046]
　Next, the unvulcanized rubber sheet is wound to form an unvulcanized laminate. Next, the unvulcanized laminate is vulcanized and molded under the condition of heating and pressing. After a lapse of a predetermined time, it is cooled to obtain a vulcanized laminate 34C having the bonding layer 32 in which the thermoplastic resin is solidified and the belt body layer 30 in which the vulcanized rubber is solidified on the reinforcing sheet 22 (FIG. 10C). In the vulcanized laminate 34C, the unvulcanized rubber sheet is vulcanized by the crosslinking agent, and the vulcanized rubber and the thermoplastic resin are chemically bonded via the crosslinking agent. In the vulcanized laminate 34C, the portion where the bonding layer 32 is provided is formed with a ridge 35C that protrudes in the radial direction over the axial direction.
[0047]
　Then, the outer periphery of the vulcanized laminate 34C is polished to a position C in the figure to remove the ridge 35C. A primary endless belt can be obtained by cutting the vulcanized laminate 34C obtained as described above into a ring with a predetermined width. The primary endless belt has one end including the first end surface 13 of the belt main body 29 and the other end including the second end surface 15 connected to each other via the connecting portion 40A. In the primary endless belt obtained as described above, the coupling portion 40A is cut in the thickness direction, and the coupling portion 40A is separated into the first coupling portion 14A and the second coupling portion 16B. The belt-shaped belt 10C shown can be obtained.
[0048]
　In the belt-shaped belt 10C and the endless belt 42C of this embodiment, the thermoplastic resin and the vulcanized rubber are chemically bonded to each other, so that the same effect as that of the first embodiment can be obtained. Further, in the case of the present embodiment, the first extension portion 31 and the second extension portion 33 cover the surfaces of the first connecting portion 14A and the second connecting portion 16A opposite to the surface in contact with the reinforcing cloth 18, and are chemically bonded. As a result, it is possible to suppress the occurrence of cracks at the joint surface between the first end surface 13 and the second end surface 15 of the belt body 29 and the joint portion 40A. Therefore, the belt-shaped belt 10C and the endless belt 42C can improve the bending resistance. Further, by combining this embodiment with the second embodiment, it is possible to obtain a belt-shaped belt and an endless belt having bending resistance and breaking strength.
[0049]
4. MODIFIED EXAMPLE The
　present invention is not limited to the above-described embodiment, but can be appropriately modified within the scope of the gist of the present invention.
[0050]
　In the case of the above embodiment, the case where the primary endless belt is manufactured and the primary endless belts are the belt-shaped belts 10A, 10B, and 10C has been described, but the present invention is not limited to this. As shown in FIG. 11, a belt-shaped belt 10A, 10B, 10C may be formed by using a flat mold 50 as a mold. In the case of this figure, the reinforcing sheet 22 is laid on the surface of the flat mold 50, the strip-shaped thermoplastic resin sheets 24 are arranged at both ends of the reinforcing sheet 22, and the unvulcanized rubber sheet 26 is superposed thereon. A flat plate-shaped unvulcanized laminate 52 is obtained. Next, the unvulcanized laminate 52 is heated and vulcanized and molded to obtain a vulcanized laminate (not shown). Then, the ridges formed on both ends of the vulcanized laminate are removed by polishing. The belt-shaped belt 10A (FIG. 1) can be obtained by cutting the vulcanized laminate obtained as described above in a belt shape with a predetermined width. The belt-like belt 10B (FIG. 9A) can be obtained by tapering the long side of the thermoplastic resin sheet 24 toward the end so that the thickness gradually decreases and the taper shape is inclined toward the reinforcing sheet. Further, the belt-shaped belt 10C (FIG. 10A) can be obtained by making the thickness of the thermoplastic resin sheet 24 smaller than the thickness of the unvulcanized rubber sheet. Like the present modification, the belt-shaped belts 10A, 10B and 10C formed without passing through the primary endless belt are endless by fusing the first joint portions 14A and 14B and the second joint portions 16A and 16B. Belts 42A, 42B, 42C can be obtained.
[0051]
　In the above embodiment, the case where the primary endless belt is used as the belt-shaped belts 10A, 10B and 10C has been described, but the present invention is not limited to this. If there is time to replace the endless belt, the carrier device may be removed from the automatic ticket gate, and the used endless belt may be replaced with the primary endless belt.
[0052]
　In the case of the above embodiment, the case where the end portion of the unvulcanized rubber sheet 26 is arranged by overlapping the width direction end portion of the thermoplastic resin sheet 24 in the thickness direction has been described, but the present invention is not limited to this. Instead, the end faces may be in contact with each other.
[0053]
　In the above embodiment, the belt-shaped belts 10A, 10B, 10C and the endless belts 42A, 42B, 42C have been described as having a reinforcing cloth, but the present invention is not limited to this, and the reinforcing cloth 18 may be omitted. ..
Explanation of symbols
[0054]
10A, 10B, 10C Belt-shaped belts 12,
29 Belt body
13 First end faces
14A, 14B First joint portion
15 Second end faces
16A, 16B Second joint portion
17 First tip portion
18 Reinforcing cloth
19 Second tip portion
20 Drum (
22 ) Reinforcement sheet
24 Thermoplastic resin sheet
26
Unvulcanized rubber sheet 28 Unvulcanized laminate
34A, 34B, 34C Vulcanized laminate
38 Endless belts
40A, 40B Joining portions
42A, 42B, 42C Endless belt
50 Plain metal Mold (mold)
52 Unvulcanized laminate
The scope of the claims
[Claim 1]
On the mold surface
, formed of a thermoplastic resin, a belt-shaped thermoplastic resin sheet that serves as a bonding portion,
an unvulcanized rubber, and a crosslinking agent covalently bonded to the unvulcanized rubber and the thermoplastic resin,
Laminate forming step of arranging an unvulcanized rubber sheet to be a belt main body in a state where ends thereof are in contact with each other to obtain
an unvulcanized laminate, and vulcanization molding for vulcanizing and molding the unvulcanized laminate A
method for manufacturing a belt-shaped belt, comprising:
[Claim 2]
The method for manufacturing a belt-shaped belt according to claim 1, further comprising a polishing step of polishing the surface of the vulcanized laminate obtained in the vulcanization molding step.
[Claim 3]
In the laminated body forming step, a thermoplastic resin sheet and the unvulcanized rubber sheet
, on a reinforcing sheet serving as a reinforcing cloth disposed on the mold surface, in a state where end portions are in contact with each other, The method for manufacturing a belt-shaped belt according to claim 1 or 2, wherein the reinforcing belts are arranged on the same surface .

[Claim 4]
The coupling portion is a first coupling portion provided on one end side of the belt body and a second coupling portion provided on the other end side of the belt body. Of manufacturing belt-shaped belt.
[Claim 5]
A method for manufacturing an endless belt, comprising a step of mounting the belt-shaped belt manufactured by the manufacturing method according to claim 4 on a conveying device and then fusing the first coupling portion and the second coupling portion to form an endless belt.
[Claim 6]
Vulcanized rubber strip of the belt body formed, and said a first coupling portion provided at one end of the belt body, and a second coupling portion provided at the other end of the belt body
comprising a
thermoplastic resin And at least one thermoplastic resin sheet to be the first bonding portion and the second bonding portion,
an unvulcanized rubber, and a cross-linking agent covalently bonded to the unvulcanized rubber and the thermoplastic resin.
A belt-shaped belt obtained by vulcanizing and forming an unvulcanized rubber sheet which becomes the belt main body in a state where an end portion of the thermoplastic resin sheet and an end portion of the unvulcanized rubber sheet are in contact with each other.
[Claim 7]
The joint surface of the first joint portion that contacts one end of the belt body, and the joint surface of the second joint portion that contacts the other end of the belt body are tapered such that the thickness gradually decreases toward the end portion. The belt-shaped belt according to item 6.
[Claim 8]
The belt-shaped belt according to claim 6 or 7, wherein a part of the belt main body extends to one side surface of the first joint portion and the second joint portion.
[Claim 9]
The belt belt according to any one of claims 6 to 8, wherein the belt main body, and the first joint portion and the second joint portion are provided on a reinforcing cloth.
[Claim 10]
Vulcanized rubber strip of the belt body formed, and a coupling section provided between the two ends of the belt body
comprises a
formed thermoplastic resin, a thermoplastic resin sheet comprising said coupling portion,
An unvulcanized rubber sheet, an unvulcanized rubber sheet that contains the unvulcanized rubber and a cross-linking agent that covalently bonds to the thermoplastic resin, and serves as the belt body, and
the end portion of the thermoplastic resin sheet and the unvulcanized rubber sheet. An endless belt obtained by vulcanization molding with the end of the vulcanized rubber sheet in contact.
[Claim 11]
11. The endless belt according to claim 10, wherein the joining surfaces on both sides of the joining portion that are in contact with the belt body are tapered so that the thickness gradually decreases toward the end portion.
[Claim 12]
The endless belt according to claim 10 or 11, wherein a part of the belt main body extends to one side surface of the coupling portion.
[Claim 13]
The endless belt according to any one of claims 10 to 12, wherein the belt body and the coupling portion are provided on a reinforcing cloth.