WO2019102713A1 - 帯状ベルト、無端ベルト、及びその製造方法 - Google Patents

帯状ベルト、無端ベルト、及びその製造方法 Download PDF

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Publication number
WO2019102713A1
WO2019102713A1 PCT/JP2018/036081 JP2018036081W WO2019102713A1 WO 2019102713 A1 WO2019102713 A1 WO 2019102713A1 JP 2018036081 W JP2018036081 W JP 2018036081W WO 2019102713 A1 WO2019102713 A1 WO 2019102713A1
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WO
WIPO (PCT)
Prior art keywords
belt
thermoplastic resin
main body
unvulcanized rubber
sheet
Prior art date
Application number
PCT/JP2018/036081
Other languages
English (en)
French (fr)
Inventor
良寛 小西
武士 窪田
亮人 大井
暁彦 栗谷
Original Assignee
ニッタ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ニッタ株式会社 filed Critical ニッタ株式会社
Priority to US16/765,793 priority Critical patent/US11214441B2/en
Priority to CN201880075428.9A priority patent/CN111372762B/zh
Priority to EP18881538.5A priority patent/EP3715099A4/en
Publication of WO2019102713A1 publication Critical patent/WO2019102713A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/02—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains
    • B65H5/021—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
    • B29C65/505—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined and placed in a recess formed in the parts to be joined, e.g. in order to obtain a continuous surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
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    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/14—Particular design of joint configurations particular design of the joint cross-sections the joint having the same thickness as the thickness of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4324—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms for making closed loops, e.g. belts
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B29C66/712—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined the composition of one of the parts to be joined being different from the composition of the other part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7214—Fibre-reinforced materials characterised by the length of the fibres
    • B29C66/72141—Fibres of continuous length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7375—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured
    • B29C66/73751—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized
    • B29C66/73752—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized the to-be-joined areas of both parts to be joined being uncured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
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    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
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    • B65H2404/20—Belts
    • B65H2404/27—Belts material used
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/30—Facilitating or easing
    • B65H2601/32—Facilitating or easing entities relating to handling machine
    • B65H2601/324—Removability or inter-changeability of machine parts, e.g. for maintenance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/60—Miscellaneous
    • B65H2601/61—Refurbishing; Renewing the handling machine; Upgrading modifying functions of the handling machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/1912—Banknotes, bills and cheques or the like

Definitions

  • the present invention relates to a belt-like belt, an endless belt, and a method of manufacturing the same.
  • the endless belt is used as a transfer belt in a transfer device such as a financial terminal, an automatic ticket gate, and a ticket vending machine.
  • a transfer device such as a financial terminal, an automatic ticket gate, and a ticket vending machine.
  • a belt formed of a reinforcing material such as a fiber material (for example, knitted fabric) and a thermosetting resin such as rubber is disclosed (for example, Patent Document 1).
  • the conveying device When replacing the endless belt used in the conveying device, the conveying device must be stopped while replacing the belt. Therefore, it is desirable that the operation time for replacing the belt be as short as possible.
  • the belt after replacement in which the thermoplastic resin is fused and made into an endless shape, the boundary between the thermosetting resin and the thermoplastic resin is deteriorated earlier as compared with the seamless belt formed of the thermosetting resin, and the endurance belt is durable. There is a concern that the sex will be inferior.
  • An object of the present invention is to provide a belt-like belt, an endless belt, and a method for manufacturing the same, which can be easily joined at a site where the belt is used and can suppress a decrease in durability.
  • a belt-shaped thermoplastic resin sheet which is formed of a thermoplastic resin on a mold surface and which becomes a bonding portion, an unvulcanized rubber, the unvulcanized rubber, and the thermoplastic resin
  • a laminate forming step of obtaining an unvulcanized laminate by arranging an unvulcanized rubber sheet as a belt main body including a crosslinking agent covalently bonded to a resin in a state in which the end portions are in contact with each other; And vulcanizing and forming the vulcanized laminate.
  • the method for manufacturing an endless belt according to the present invention comprises the step of fusing the first joint portion and the second joint portion into an endless shape after the belt-like belt is attached to the conveying device.
  • the belt-like belt according to the present invention comprises a belt-like belt main body formed of vulcanized rubber, a first coupling portion provided at one end of the belt main body, and a second coupling provided at the other end of the belt main body. And at least one thermoplastic resin sheet which is formed of a thermoplastic resin and which becomes the first joint portion and the second joint portion, an unvulcanized rubber, the unvulcanized rubber, and the thermoplastic resin And an unvulcanized rubber sheet to be the belt main body in a state in which the end portion of the thermoplastic resin sheet and the end portion of the unvulcanized rubber sheet are in contact with each other. Get it.
  • the endless belt according to the present invention includes a belt-like belt main body formed of vulcanized rubber, and a connecting portion provided between both ends of the belt main body, and is formed of a thermoplastic resin, and the connecting portion
  • the thermoplastic resin sheet, the unvulcanized rubber, and the unvulcanized rubber sheet to be the belt body, the unvulcanized rubber sheet comprising the unvulcanized rubber, and the unvulcanized rubber and the crosslinking agent covalently bonded to the thermoplastic resin; It is obtained by vulcanization molding in a state where the end of the resin sheet is in contact with the end of the unvulcanized rubber sheet.
  • the endless belt can be obtained by joining one portion, so that the belt-like belt can be easily joined at the site where it is used be able to.
  • the bonding portion and the belt body are more firmly bonded because the thermoplastic resin and the vulcanized rubber are chemically bonded. Therefore, the belt-like belt and the endless belt can suppress the decrease in durability.
  • FIG. 3A is a stage of winding a reinforcing sheet
  • FIG. 3B is a stage of arranging a thermoplastic resin sheet
  • FIG. 3C is a stage of winding an unvulcanized rubber sheet.
  • FIG. It is a perspective view which shows the vulcanized laminated body obtained at the vulcanization formation process in the manufacturing method of an endless belt. It is a perspective view which shows the vulcanized laminated body after the grinding
  • FIG. 8A is an Example
  • FIG. 8B is a comparative example.
  • FIG. 9A is a belt-like belt
  • FIG. 9B is an endless belt
  • FIG. 9C is a partial cross-sectional view showing a vulcanized laminate at a production stage.
  • FIG. 10A is a belt-like belt
  • FIG. 10B is an endless belt
  • FIG. 10C is a partial cross-sectional view showing a vulcanized laminate at a production stage.
  • the belt-like belt 10A shown in FIG. 1 is a flat belt whose surface is flat and not yet endless.
  • the belt-like belt 10A includes a belt body 12, a first coupling portion 14A provided on a first end face 13 which is one end of the belt body 12 in the longitudinal direction, and a second end face 15 which is the other end of the belt body 12 in the longitudinal direction.
  • the belt body 12 is a belt-like member formed of a vulcanized rubber such as millable urethane, hydrogenated nitrile rubber (H-NBR), ethylene propylene diene rubber (EPDM), ethylene propylene rubber (EPM), and chlorosulfonated polyethylene. It is.
  • H-NBR hydrogenated nitrile rubber
  • EPDM ethylene propylene diene rubber
  • EPM ethylene propylene rubber
  • the joint surface of the first end face 13 and the first coupling portion 14A, and the joint surface of the second end face 15 and the second joint portion 16A are all flat.
  • the first tip end 17 which is the tip of the first coupling portion 14A and the second tip 19 which is the tip of the second coupling portion 16A are both flat.
  • the first bonding portion 14A and the second bonding portion 16A are plate-like members formed of a thermoplastic resin, for example, a urethane elastomer, a polyamide elastomer, a polyester elastomer, a polyvinyl chloride elastomer, or a 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.
  • the vulcanized rubber of the first end face 13 and the second end face 15 and the thermoplastic resin of the first joint portion 14A and the second joint portion 16A are chemically bonded to each other, so that the first end face 13 and the second end face 15 It is more strongly bonded than heat fusion bonding.
  • the belt-like belt 10A is provided with a reinforcing cloth 18, and on the reinforcing cloth 18, a belt main body 12 and a first coupling portion 14A coupled to the first end face 13 of the belt main body 12; A second coupling portion 16A coupled to the second end face 15 is stacked.
  • the belt-like belt 10A has a reinforcing cloth 18 disposed on one side surface, and the belt body 12, the first coupling portion 14A and the second coupling portion 16A disposed on the other side surface, and is formed in two layers as a whole.
  • the reinforcing cloth 18 imparts durability to the belt-shaped belt 10A.
  • Examples of the material of the reinforcing cloth 18 include woven or knitted fabrics of polyester fiber, nylon fiber, aramid fiber, glass fiber, carbon fiber, cotton and the like.
  • the thickness of the fibers forming the reinforcing cloth 18 is not particularly limited, and is, for example, about 70 to 280 T (dtex).
  • a rubber composition to be a raw material of the belt body 12 is prepared.
  • An unvulcanized rubber to be vulcanized rubber, a crosslinking agent covalently bonded to the unvulcanized rubber and the thermoplastic resin, and, if necessary, a hydrolysis inhibitor and other additives are added and mixed.
  • an unvulcanized rubber sheet is produced by a calender device. The size of the unvulcanized rubber sheet is matched to the size of the reinforcing sheet described later.
  • covalent bond refers to a bond in which two atoms share an electron, and refers to one having a sigma bond or / and a pi bond. More specifically, the crosslinker is covalently bonded to the unvulcanized rubber functional group and the functional group of the thermoplastic resin.
  • Crosslinking agents include peroxides such as dicumyl peroxide, tert-butyl peroxide, tert-butyl cumyl peroxide, 1,1-di (tert-butylperoxy) -3,3,5-trimethylcyclohexane, 2,5-Dimethyl-2,5-di (tert-butylperoxy) hexane, 2,5-Dimethyl-2,5-di (tert-butylperoxy) hexyne-3,1,3-di (tert-butyl) Butylperoxyisopropyl) benzene, 2,5-dimethyl-2,5-di (benzoylperoxy) hexane, tert-butylperoxybenzoate, tert-butylperoxyisopropylcarbonate, n-butyl-4,4-di ( Tertiary butyl peroxy) valerate can be used. It is preferable that the
  • a reinforcing sheet 22 to be a reinforcing cloth 18 is wound around the surface of a cylindrical drum 20 as a mold (FIG. 3A).
  • the reinforcing cloth 18 is an endless shape having a size (peripheral length) which can not be removed from the mold.
  • a strip-shaped thermoplastic resin sheet 24 formed of the above-mentioned thermoplastic resin and becoming the first bonding portion 14A and the second bonding portion 16A is disposed on the surface of the reinforcing sheet 22 in the axial direction of the drum 20 (FIG. 3B).
  • the unvulcanized rubber sheet 26 is wound to form an unvulcanized laminate 28 (FIG. 3C).
  • the unvulcanized rubber sheet 26 is disposed on the reinforcing sheet 22 and on the same plane as the thermoplastic resin sheet 24. If the unvulcanized rubber sheet 26 covers the exposed reinforcing sheet 22 in the circumferential direction and is in contact with the end of the thermoplastic resin sheet 24 in the width direction, the surface of the thermoplastic resin sheet 24 is not necessarily completely covered. It does not have to be In the case of this figure, the end of the unvulcanized rubber sheet 26 is disposed overlapping the end in the width direction of the thermoplastic resin sheet 24.
  • the end includes an end face and a constant region in a direction perpendicular to the end face.
  • the unvulcanized laminate 28 is vulcanized and formed under heat and pressure.
  • the heating temperature may be, for example, about 150 to 180.degree.
  • the sheet is cooled and, as shown in FIG. 4, on the reinforcing sheet 22 (not shown in the drawing), the bonding layer 32 in which the thermoplastic resin is solidified and the belt main layer 30 in which the vulcanized rubber is solidified.
  • a vulcanized laminate 34A is obtained.
  • 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.
  • the vulcanized laminate 34 ⁇ / b> A a portion where the bonding layer 32 is provided is formed with a protruding stripe 35 ⁇ / b> A which radially protrudes in the axial direction.
  • the outer periphery of the vulcanized laminate 34A is polished to remove the ridges 35A (FIG. 5).
  • an endless belt 38 shown in FIG. 6 can be obtained.
  • the endless belt 38 the first end surface 13 and the second end surface 15 of the belt body are connected via the connecting portion 40A.
  • the endless belt 38 obtained as described above is called a primary endless belt.
  • the band-shaped belt 10A shown in FIG. 1 is obtained by cutting the connecting portion 40A in the thickness direction and separating the connecting portion 40A into the first connecting portion 14A and the second connecting portion 16A.
  • the belt-like belt 10A may use any surface of the belt body 12 and the reinforcing cloth 18 as the surface of the belt (for example, as a conveying surface when used as a conveying belt).
  • the first end face 13 and the second end face 15 are disposed on the upper surface of the lower die (not shown) in a state where the first tip end 17 and the second tip end 19 are butted.
  • the first coupling portion 14A and the second coupling portion 16A are disposed in a state in which the first distal end portion 17 and the second distal end portion 19 are in contact or in a state in which a part thereof overlaps in the thickness direction.
  • the upper die is disposed on the first bonding portion 14A and the second bonding portion 16A, and heating is performed while pressing in the thickness direction with a pressing body (not shown) for a fixed time. Then, the first bonding portion 14A and the second bonding portion 16A melt and fluidize.
  • the lower and upper molds are cooled to solidify the first joint portion 14A and the second joint portion 16A, and as shown in FIG. 7, the joint portion 40A is formed.
  • the first end surface 13 and the second end surface 15 are coupled via the coupling portion 40A, and the endless belt 42A is formed.
  • the first coupling portion 14A and the second coupling portion 16A are fused and integrated to form a coupling portion 40A.
  • the reinforcing cloth 18 is fused and integrated with the infiltrating thermoplastic resin of the first bonding portion 14A and the second bonding portion 16A.
  • first coupling portion 14A and the second coupling portion 16A can be integrated again by abutting and fusing the first distal end portion 17 and the second distal end portion 19.
  • An endless belt 42A formed by integrating the first joint portion 14A and the second joint portion 16A once separated in this way again to obtain a joint 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 connected via the connecting portion 40A.
  • thermoplastic resin and the vulcanized rubber are chemically bonded, the bonding portion 40A and the belt body 12 are more firmly bonded. Therefore, endless belt 42A can control a fall of endurance.
  • the bonding portion 40A and the belt body 12 are more firmly bonded.
  • An endless belt having the cross-sectional shape shown in FIG. 8A was manufactured in the same procedure as the above manufacturing method, and the tensile strength was measured.
  • the belt main body 12 contains 4.0 parts by weight of millable urethane as unvulcanized rubber and dicumyl peroxide as a crosslinking agent with respect to 100 parts by weight of millable urethane.
  • the bonding portion 40A uses a thermoplastic polyurethane as a thermoplastic resin. It vulcanized at 170 ° C. to produce an endless belt having a thickness of 0.8 mm, a width of 10 mm, a circumferential length of 350 mm, and a length of 100 mm in the longitudinal direction of the connecting portion 40A.
  • the endless belt of the comparative example uses the same material as the endless belt according to the embodiment, and includes a reinforcing cloth 18 and a belt main body 12 formed of vulcanized rubber provided on the reinforcing cloth 18.
  • the end portions of the belt body 12 and the reinforcing cloth 18 are joined together by a fusion joint 46.
  • the end portions of the belt main body 12 and the fusion-bonded portion 46 are joined by heating, melting, cooling and solidifying a thermoplastic resin sheet 24 disposed between the end portions of the belt main body 12 after vulcanization. Therefore, the vulcanized rubber of the belt main body 12 and the thermoplastic resin of the fusion bonding portion 46 are not chemically bonded.
  • a tensile tester Autograph AGS-2000B manufactured by Shimadzu Corporation
  • the tensile speed in the case of the example was constant at 350 mm / min.
  • the tensile speed in the case of the comparative example was 26.3 mm / min up to a displacement of 50 mm and 263 mm / min over a displacement of 50 mm.
  • the measurement temperature was set to four conditions of 25 ° C., 40 ° C., 60 ° C.
  • the breaking strengths used for the calculation of the breaking strength index were respectively an average of 3 measured values in the example and 4 measured values in the comparative example. From this table, it was confirmed that the breaking strength of the example exceeded that of the comparative example under all the conditions.
  • the belt body was broken except for one at 80 ° C. From this, it is considered that the endless belt of the embodiment has a higher breaking strength due to the belt body and the joint portion being more firmly bonded by the chemical bond.
  • the endless belts of the comparative example are all broken between the belt main body and the joint, and the joint strength between the belt main body and the joint joined by fusion is inferior to that of the belt main body. It is considered that the strength is lower than that of the example.
  • a belt-like belt 10B shown in FIG. 9A includes a reinforcing cloth 18, a belt body 12, a first coupling portion 14B, and a second coupling portion 16B.
  • the first coupling portion 14 ⁇ / b> B is joined to the first end surface 37 of the belt body 12 at the first joint surface 21.
  • the second joint portion 16 ⁇ / b> B is joined to the second end face 39 of the belt body 12 at the second joint surface 23.
  • the first bonding surface 21 and the second bonding surface 23 have a tapered shape whose thickness gradually decreases toward the end.
  • the 1st joint surface 21 and the 2nd joint surface 23 are the taper shape which inclines in the direction of the above-mentioned reinforcement cloth 18 as it goes to an end.
  • the joint portion 40B is formed by fusing the first end portion 17 and the second end portion 19 into one piece.
  • the first end surface 37 and the second end surface 39 are coupled via the coupling portion 40B to form an endless belt 42B.
  • the belt-like belt 10B and the endless belt 42B 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 to be the reinforcing cloth 18 is wound around the surface of the cylindrical drum 20 as a mold. Next, a strip-shaped thermoplastic resin sheet, which is formed of the above-described thermoplastic resin and becomes the first bonding portion 14B and the second bonding portion 16B, is disposed on the surface of the reinforcing sheet in the axial direction of the drum.
  • the long side of the belt-like thermoplastic resin sheet has a tapered shape in which the thickness gradually decreases toward the end and inclines in the direction of the reinforcing sheet.
  • the unvulcanized rubber sheet is wound to form an unvulcanized laminate.
  • the unvulcanized laminate is vulcanized and formed under heat and pressure. After a predetermined time has elapsed, the laminate is cooled to obtain a vulcanized laminate 34B having the bonding layer 25 in which the thermoplastic resin is solidified and the belt main layer 30 in which the vulcanized rubber is solidified on the reinforcing sheet 22 (FIG. 9C).
  • 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.
  • a portion where the bonding layer 25 is provided is formed with a protruding stripe 35B which radially protrudes in the axial direction.
  • a primary endless belt can be obtained by annularly cutting the vulcanized laminate 34B obtained as described above with a predetermined width.
  • the first end surface 37 and the second end surface 39 of the belt body 12 are coupled via the coupling portion 40B.
  • the connecting portion 40B is cut in the thickness direction, and the connecting portion 40B is separated into the first connecting portion 14B and the second connecting portion 16B, as shown in FIG. 9A.
  • the belt-shaped belt 10B shown can be obtained.
  • the belt-like belt 10B and the endless belt 42B of the present embodiment since the thermoplastic resin and the vulcanized rubber are chemically bonded, the same effect as that of the first embodiment can be obtained. Furthermore, in the case of the present embodiment, since the first joint surface 21 and the second joint surface 23 are tapered in the direction of the reinforcing cloth 18 toward the end, the first joint portion 14B and the second joint portion 16B. The bonding area of the first end surface 37 and the second end surface 39 of the belt body 12 is increased. Therefore, the belt-like belt 10B and the endless belt 42B can further improve the breaking strength.
  • the first joint surface 21 and the second joint surface 23 are tapered in the direction of the reinforcing cloth 18 toward the end, but the present invention is limited to this. Absent. Even if the first joint surface 21 and the second joint surface 23 are tapered such that the direction of inclination is opposite to that shown in FIGS. 9A to 9C, that is, inclined in the direction away from the reinforcing cloth 18 toward the end. Good. In this case, the long side of the belt-like thermoplastic resin sheet used in the manufacturing process has a tapered shape whose thickness gradually decreases toward the end and inclines 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 tapered shape in which the thickness gradually decreases toward the end and inclines in the reinforcing sheet direction.
  • a thermoplastic resin sheet is disposed between long sides of an unvulcanized rubber sheet, and a vulcanized laminate in which a vulcanized rubber and a thermoplastic resin sheet are chemically bonded by vulcanization molding under heating and pressure conditions. Is obtained.
  • a primary endless belt can be obtained by annularly cutting the vulcanized laminate at a predetermined width. In the belt-like belt and the endless belt obtained in this manner, since the bonding area with the first end face and the second end face of the belt main body is increased, the same effect as that of the second embodiment can be obtained.
  • a belt-like belt 10C shown in FIG. 10A includes a reinforcing cloth 18, a belt main body 29, a first coupling portion 14A, and a second coupling portion 16A.
  • One end of the belt body 29 covers the first end face 13 in contact with the end of the first coupling portion 14A and the surface (one side) of the first coupling portion 14A opposite to the surface in contact with the reinforcing cloth 18,
  • a first extension portion 31 in which a part of the belt main body 29 is extended is formed.
  • a second extension 33 is formed by extending a part of the belt body 29.
  • the connecting portion 40A is formed.
  • One end including the first end surface 13 and the other end including the second end surface 15 are coupled via the coupling portion 40A, and an endless belt 42C is formed.
  • the tips of the first extension 31 and the second extension 33 are in contact with each other.
  • the belt-like 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 to be the reinforcing cloth 18 is wound around the surface of a cylindrical drum as a mold. Next, a belt-like thermoplastic resin sheet, which is formed of the above-described thermoplastic resin and becomes the first bonding portion 14A and the second bonding portion 16A, is disposed on the surface of the reinforcing sheet in the axial direction of the drum. The thickness of the belt-like thermoplastic resin sheet is thinner than the thickness of the unvulcanized rubber sheet.
  • the unvulcanized rubber sheet is wound to form an unvulcanized laminate.
  • the unvulcanized laminate is vulcanized and formed under heat and pressure. After a predetermined time has elapsed, the laminate is cooled to obtain a vulcanized laminate 34C having the bonding layer 32 in which the thermoplastic resin is solidified and the belt main layer 30 in which the vulcanized rubber is solidified on the reinforcing sheet 22 (FIG. 10C).
  • 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.
  • a portion where the bonding layer 32 is provided has a convex 35 ⁇ / b> C protruding radially in the axial direction.
  • a primary endless belt can be obtained by annularly cutting the vulcanized laminate 34C obtained as described above with a predetermined width.
  • the primary endless belt has one end including the first end surface 13 of the belt body 29 and the other end including the second end surface 15 coupled to each other through the coupling portion 40A.
  • 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, as shown in FIG. 10A.
  • the belt-shaped belt 10C shown can be obtained.
  • the belt-like belt 10C and the endless belt 42C of the present embodiment since the thermoplastic resin and the vulcanized rubber are chemically bonded, the same effect as that of the first embodiment can be obtained. Furthermore, in the case of this embodiment, the first extension 31 and the second extension 33 cover and chemically bond the surface of the first coupling portion 14A and the second coupling portion 16A opposite to the surface in contact with the reinforcing cloth 18. As a result, it is possible to suppress the occurrence of cracks in the joint surface between the first end surface 13 and the second end surface 15 of the belt main body 29 and the connecting portion 40A. Therefore, the belt-like belt 10C and the endless belt 42C can improve the bending resistance. Further, by combining the present embodiment and the second embodiment, it is possible to obtain a belt-like belt and an endless belt having bending resistance and breaking strength.
  • the belt-like belts 10A, 10B and 10C may be formed using a flat mold 50 as a mold.
  • the reinforcing sheet 22 is laid on the surface of the flat mold 50, and the belt-like thermoplastic resin sheets 24 are arranged on both ends of the reinforcing sheet 22, respectively, and the unvulcanized rubber sheet 26 is superposed thereon. , The plate-like unvulcanized laminate 52 is obtained.
  • the belt-like belt 10A (FIG. 1) can be obtained by cutting the vulcanized laminate obtained as described above into a band shape with a predetermined width.
  • the belt-like belt 10B (FIG. 9A) can be obtained by tapering the thickness gradually in the direction of the reinforcing sheet as the long side of the thermoplastic resin sheet 24 approaches the end. Further, by making the thickness of the thermoplastic resin sheet 24 thinner than the thickness of the unvulcanized rubber sheet, it is possible to obtain the belt-like belt 10C (FIG. 10A).
  • the belt-shaped belts 10A, 10B, 10C formed without passing through the primary endless belt are endless by fusing the first coupling portions 14A, 14B and the second coupling portions 16A, 16B.
  • Belts 42A, 42B, 42C can be obtained.
  • the end of the unvulcanized rubber sheet 26 has been described as being disposed by overlapping the end in the width direction of the thermoplastic resin sheet 24 in the thickness direction, but the present invention is limited thereto Alternatively, the end faces may be placed in contact with each other.
  • the belts 10A, 10B, 10C and the endless belts 42A, 42B, 42C have the reinforcing cloths, but the present invention is not limited to this and the reinforcing cloths 18 may be omitted. .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Belt Conveyors (AREA)

Abstract

ベルトが使用される現場において容易に接合でき耐久性の低下を抑制することができる帯状ベルト、無端ベルト、及びその製造方法を提供する。金型表面に、熱可塑性樹脂で形成され、結合部１４Ａ，１６Ａとなる帯状の熱可塑性樹脂シートと、未加硫ゴムと、前記未加硫ゴム及び前記熱可塑性樹脂と共有結合する架橋剤とを含み、ベルト本体１２となる未加硫ゴムシートとを、端部同士が接触した状態で配置して、未加硫積層体を得る積層体形成工程と、前記未加硫積層体を加硫成形する加硫成形工程とを備える。

Description

帯状ベルト、無端ベルト、及びその製造方法
　本発明は、帯状ベルト、無端ベルト、及びその製造方法に関するものである。
　無端ベルトは、金融端末装置、自動改札機、券売機などの搬送装置における搬送用ベルトに使用されている。この無端ベルトとしては、例えば、繊維材（例えば編布）などの補強材とゴムなどの熱硬化性樹脂とからなるベルトが開示されている（例えば、特許文献１）。
特開２０１６－０３８０１０号公報
　例えば自動改札機の搬送装置に使用されている無端ベルトを交換するには、搬送装置を自動改札機から一旦取り外し、ベルト交換後、搬送装置を再度自動改札機へ取り付ける必要があるので、余計に作業時間を要し、作業が煩雑になってしまう。無端ベルトを切断して帯状とした状態で搬送装置に取り付けた後、無端状に戻すことができればベルトの交換作業を簡略化できる。しかしながら、上記特許文献１にみられるような搬送装置に用いられる無端ベルトは、熱硬化性樹脂を主材料とするので、一旦切断したあと再度接合するには、熱硬化性樹脂同士を接合する接着部が必要であり、作業が煩雑になるという問題がある。
　搬送装置に使用されている無端ベルトを交換する際、ベルトを交換している間、搬送装置は停止せざるを得ない。そのため、ベルトを交換する作業時間は、可能な限り短いことが望まれる。また、熱可塑性樹脂を融着して無端状とした交換後のベルトは、熱硬化性樹脂で形成されたシームレスベルトに比べ、熱硬化性樹脂と熱可塑性樹脂の境目が早期に劣化し、耐久性が劣ってしまうという懸念がある。
　本発明は、ベルトが使用される現場において容易に接合でき耐久性の低下を抑制することができる帯状ベルト、無端ベルト、及びその製造方法を提供することを目的とする。
　本発明に係る帯状ベルトの製造方法は、金型表面に、熱可塑性樹脂で形成され、結合部となる帯状の熱可塑性樹脂シートと、未加硫ゴムと、前記未加硫ゴム及び前記熱可塑性樹脂と共有結合する架橋剤とを含み、ベルト本体となる未加硫ゴムシートとを、端部同士が接触した状態で配置して未加硫積層体を得る積層体形成工程と、前記未加硫積層体を加硫成形する加硫成形工程とを備える。
　本発明に係る無端ベルトの製造方法は、帯状ベルトを搬送装置に装着後、第１結合部と第２結合部を融着し、無端状とする工程を備える。
　本発明に係る帯状ベルトは、加硫ゴムで形成された帯状のベルト本体、及び、前記ベルト本体の一端に設けられた第１結合部と、前記ベルト本体の他端に設けられた第２結合部とを備え、熱可塑性樹脂で形成され、前記第１結合部及び前記第２結合部となる少なくとも１つの熱可塑性樹脂シートと、未加硫ゴムと、前記未加硫ゴム及び前記熱可塑性樹脂と共有結合する架橋剤とを含み、前記ベルト本体となる未加硫ゴムシートとを、前記熱可塑性樹脂シートの端部と前記未加硫ゴムシートの端部が接触した状態で、加硫成形して得る。
　本発明に係る無端ベルトは、加硫ゴムで形成された帯状のベルト本体、及び、前記ベルト本体の両端部の間に設けられた結合部とを備え、熱可塑性樹脂で形成され、前記結合部となる熱可塑性樹脂シートと、未加硫ゴムと、前記未加硫ゴム及び前記熱可塑性樹脂と共有結合する架橋剤とを含み、前記ベルト本体となる未加硫ゴムシートとを、前記熱可塑性樹脂シートの端部と前記未加硫ゴムシートの端部が接触した状態で、加硫成形して得る。
　本発明によれば、接合部が、予めベルト本体に設けられているため、１ヶ所を接合することにより、無端ベルトを得ることができるので、帯状ベルトは、使用される現場において容易に接合することができる。結合部とベルト本体は、熱可塑性樹脂と加硫ゴムが化学結合をしているので、より強固に結合される。したがって帯状ベルト及び無端ベルトは、耐久性の低下を抑制することができる。
第１実施形態に係る帯状ベルトを示す斜視図である。 第１実施形態に係る帯状ベルトの端部の拡大縦断面図である。 無端ベルトの製造方法における巻き付け工程を示す斜視図であり、図３Ａは補強シートを巻き付けた段階、図３Ｂは熱可塑性樹脂シートを配置した段階、図３Ｃは未加硫ゴムシートを巻き付けた段階を示す図である。 無端ベルトの製造方法における加硫成形工程で得られた加硫積層体を示す斜視図である。 無端ベルトの製造方法における研磨工程後の加硫積層体を示す斜視図である。 第１実施形態に係る無端ベルトを示す斜視図である。 第１実施形態に係る帯状ベルトを無端ベルトとした場合の結合部の拡大縦断面図である。 引張試験に用いた試料を示す断面図であり、図８Ａは実施例、図８Ｂは比較例である。 第２実施形態の説明に用いる部分断面図であり、図９Ａは帯状ベルト、図９Ｂは無端ベルト、図９Ｃは製造段階における加硫積層体を示す部分断面図である。 第３実施形態の説明に用いる部分断面図であり、図１０Ａは帯状ベルト、図１０Ｂは無端ベルト、図１０Ｃは製造段階における加硫積層体を示す部分断面図である。 第１実施形態に係る帯状ベルトの製造方法の変形例を示す斜視図である。
　以下、図面を参照して本発明の実施形態について詳細に説明する。
１．第１実施形態
（全体構成）
　図１に示す帯状ベルト１０Ａは、表面が平坦であって未だ無端状とされていない平ベルトである。帯状ベルト１０Ａは、ベルト本体１２と、ベルト本体１２の長手方向の一端である第１端面１３に設けられた第１結合部１４Ａと、ベルト本体１２の長手方向の他端である第２端面１５に設けられた第２結合部１６Ａとを備える。ベルト本体１２は、加硫ゴム、例えば、ミラブルウレタン、水素化ニトリルゴム（Ｈ－ＮＢＲ）、エチレンプロピレンジエンゴム（ＥＰＤＭ）、エチレンプロピレンゴム（ＥＰＭ）、クロロスルフォン化ポリエチレンで形成された帯状の部材である。本実施形態の場合、第１端面１３と第１結合部１４Ａの接合面、第２端面１５と第２結合部１６Ａの接合面は、いずれも平坦である。第１結合部１４Ａの先端である第１先端部１７と、第２結合部１６Ａの先端である第２先端部１９は、いずれも平坦である。
　第１結合部１４Ａ及び第２結合部１６Ａは、熱可塑性樹脂、例えば、ウレタンエラストマー、ポリアミドエラストマー、ポリエステルエラストマー、ポリ塩化ビニル系エラストマー、ポリオレフィン系エラストマーで形成された板状の部材である。第１結合部１４Ａ及び第２結合部１６Ａの幅長さは、ベルト本体１２の幅長さと同じである。
　第１端面１３及び第２端面１５の加硫ゴムと、第１結合部１４Ａ及び第２結合部１６Ａの熱可塑性樹脂は、化学結合していることにより、第１端面１３と第２端面１５は、熱融着による接合に比べ、より強固に結合されている。
　図２に示すように、帯状ベルト１０Ａは、補強布１８を備え、当該補強布１８上に、ベルト本体１２と、当該ベルト本体１２の第１端面１３に結合された第１結合部１４Ａと、第２端面１５に結合された第２結合部１６Ａとが、積層されている。帯状ベルト１０Ａは、一側表面に補強布１８を配置し、他側表面にベルト本体１２、第１結合部１４Ａ及び第２結合部１６Ａが配置された、全体として２層で形成されている。補強布１８は、帯状ベルト１０Ａに耐久性を付与するものである。補強布１８の材質としては、例えば、ポリエステル繊維、ナイロン繊維、アラミド繊維、ガラス繊維、炭素繊維、綿などの織布や編布が挙げられる。補強布１８を形成する繊維の太さは特に限定されず、例えば７０～２８０Ｔ（デシテックス）程度である。
（製造方法）
　続いて、上記帯状ベルト１０Ａ及び無端ベルトの製造方法を説明する。まず、ベルト本体１２の原料となるゴム組成物を調製する。加硫ゴムになる未加硫ゴムと、前記未加硫ゴム及び前記熱可塑性樹脂と共有結合する架橋剤、および必要に応じて加水分解防止剤、その他の添加剤を加えて混合する。こうして得られたゴム組成物を用いて、カレンダー装置により未加硫ゴムシートを作製する。未加硫ゴムシートの大きさは、後述する補強シートの大きさに合わせておく。ここで、共有結合とは２個の原子が電子を共有する結合のことをいい、シグマ結合、または／及びパイ結合を有するものをいう。より具体的には、架橋剤は、未加硫ゴムの官能基、及び熱可塑性樹脂の官能基と、共有結合する。
　架橋剤は、過酸化物、例えば、ジクミルパーオキサイド、第3ブチルパーオキサイド、第3ブチルクミルパーオキサイド、1,1-ジ(第3ブチルパーオキシ)-3,3,5-トリメチルシクロヘキサン、2,5-ジメチル-2,5-ジ(第3ブチルパーオキシ)ヘキサン、2,5-ジメチル-2,5-ジ(第3ブチルパーオキシ)ヘキシン-3、1,3-ジ(第3ブチルパーオキシイソプロピル)ベンゼン、2,5-ジメチル-2,5-ジ(ベンゾイルパーオキシ)ヘキサン、第3ブチルパーオキシベンゾエート、第3ブチルパーオキシイソプロピルカーボネート、n-ブチル-4,4-ジ(第3ブチルパーオキシ)バレレートを用いることができる。未加硫ゴムシート２６は、未加硫ゴム１００重量部に対して架橋剤の配合量を２～１０重量部とするのが好ましい。
　次に、金型としての円筒状ドラム２０の表面に、補強布１８となる補強シート２２を巻き付ける（図３Ａ）。補強布１８は、金型に被せて外れない大きさ（周長）を有する無端状である。次いで、上記熱可塑性樹脂で形成され、第１結合部１４Ａ及び第２結合部１６Ａとなる帯状の熱可塑性樹脂シート２４を、前記補強シート２２の表面であって、前記ドラム２０の軸方向に配置する（図３Ｂ）。
　次に、上記未加硫ゴムシート２６を巻き付けて、未加硫積層体２８を形成する（図３Ｃ）。未加硫ゴムシート２６は、前記補強シート２２上であって、熱可塑性樹脂シート２４と同一面上に配置される。未加硫ゴムシート２６は、露出している補強シート２２を円周方向に覆い熱可塑性樹脂シート２４の幅方向端部に接触していれば、熱可塑性樹脂シート２４の表面を必ずしも完全に覆っている必要はない。本図の場合、未加硫ゴムシート２６の端部は、熱可塑性樹脂シート２４の幅方向端部に重なって配置されている。ここで端部とは、端面と、端面に垂直な方向の一定領域とを含む。
　次いで、未加硫積層体２８を加熱加圧条件下で、加硫成形する。加熱温度は、例えば、１５０～１８０℃程度としてもよい。所定時間経過後、冷却し、図４に示す、補強シート２２（本図には図示しない）上に、熱可塑性樹脂が固化した結合層３２と、加硫ゴムが固化したベルト本体層３０とを有する加硫積層体３４Ａを得る。加硫積層体３４Ａは、未加硫ゴムシート２６が架橋剤によって加硫するとともに、架橋剤を介して加硫ゴムと熱可塑性樹脂が化学結合をしている。加硫積層体３４Ａは、結合層３２が設けられている部分が、軸方向にわたって半径方向に突出した凸条３５Ａが形成されている。
　続いて、加硫積層体３４Ａの外周を研磨し、前記凸条３５Ａを除去する（図５）。上記のようにして得られた加硫積層体３６を所定の幅で環状に切断することにより、図６に示す無端ベルト３８を得ることができる。無端ベルト３８は、結合部４０Ａを介して、ベルト本体の第１端面１３と第２端面１５が結合されている。以上のようにして得られた無端ベルト３８を１次無端ベルトと呼ぶ。
　上記１次無端ベルトにおいて、結合部４０Ａを厚さ方向に切断し、当該結合部４０Ａを第１結合部１４Ａと第２結合部１６Ａに分離することにより、図１に示す帯状ベルト１０Ａが得られる。帯状ベルト１０Ａは、ベルト本体１２および補強布１８のいずれの面を、ベルトの表面（例えば、搬送用ベルトとして使用する場合は搬送面）として使用してもよい。
（使用方法）
　次に、帯状ベルト１０Ａを無端ベルトにする方法を説明する。まず、第１先端部１７と第２先端部１９を突き合わせた状態で、第１端面１３及び第２端面１５を図示しない下型の上面に配置する。第１結合部１４Ａ及び第２結合部１６Ａは、第１先端部１７と第２先端部１９が接触した状態、又は、厚さ方向に一部が重なった状態で配置される。次いで、第１結合部１４Ａと第２結合部１６Ａの上に上型を配置して、一定時間、加圧体（図示しない）によって厚さ方向に加圧しながら、加熱する。そうすると第１結合部１４Ａと第２結合部１６Ａは、溶融して流動化する。
　次いで、下型及び上型を冷却することにより、第１結合部１４Ａ及び第２結合部１６Ａが固化し、図７に示すように、結合部４０Ａが形成される。上記のようにして、結合部４０Ａを介して、第１端面１３と第２端面１５が結合され、無端ベルト４２Ａが形成される。図７に示すように、第１結合部１４Ａと第２結合部１６Ａは融着して一体となって結合部４０Ａとなる。補強布１８は、浸透している第１結合部１４Ａ及び第２結合部１６Ａの熱可塑性樹脂が融着し、一体化される。
　上記のように第１結合部１４Ａと第２結合部１６Ａは、第１先端部１７及び第２先端部１９を突き合わせて融着することにより、再度一体化することができる。このように一旦分離された第１結合部１４Ａと第２結合部１６Ａを再度一体化して結合部４０Ａを得ることにより形成される無端ベルト４２Ａを２次無端ベルト（図７）と呼ぶ。１次無端ベルトと、２次無端ベルトは、結合部４０Ａを介して、ベルト本体１２の第１端面１３と第２端面１５が結合されている点において共通している。
（作用及び効果）
　本実施形態の場合、第１結合部１４Ａ及び第２結合部１６Ａが、予めベルト本体１２に設けられているため、第１結合部１４Ａ及び第２結合部１６Ａ同士の１ヶ所を結合することにより、無端ベルト４２Ａを得ることができる。したがって結合箇所を１ヶ所のみとすることができるので、帯状ベルト１０Ａは、使用される現場において容易に接合することができる。
　熱可塑性樹脂と加硫ゴムが化学結合をしているので、結合部４０Ａとベルト本体１２は、より強固に結合される。したがって無端ベルト４２Ａは、耐久性の低下を抑制することができる。
　補強布１８が結合部４０Ａの熱可塑性樹脂と接着されているので、結合部４０Ａとベルト本体１２は、より強固に結合される。
　上記製造方法と同じ手順で図８Ａに示す断面形状を有する無端ベルトを作製し、引張強度を測定した。補強布１８は、ポリエステル繊維で形成した無端状の編布を用いた。ベルト本体１２は、未加硫ゴムとしてミラブルウレタン、架橋剤としてジクミルパーオキサイドをミラブルウレタン１００重量部に対し４．０重量部配合した。結合部４０Ａは、熱可塑性樹脂として熱可塑性ポリウレタンを用いた。１７０℃で加硫し、厚さ０.８ｍｍ、幅１０ｍｍ、周長３５０ｍｍ、結合部４０Ａのベルト長手方向の長さ１００ｍｍの無端ベルトを作製した。
　比較として、図８Ｂに示す断面形状を有する無端ベルトを作製した。比較例の無端ベルトは、実施例に係る無端ベルトと同じ材料を用い、補強布１８と、当該補強布１８上に設けられた加硫ゴムで形成されたベルト本体１２とを備える。ベルト本体１２及び補強布１８の端部同士は、融着部４６によって接合されている。ベルト本体１２の端部同士と融着部４６は、加硫後のベルト本体１２の端部同士の間に配置した熱可塑性樹脂シート２４を加熱溶融、冷却固化させることにより接合している。したがって、ベルト本体１２の加硫ゴムと融着部４６の熱可塑性樹脂は、化学結合していない。
　破断試験には、引張試験機（島津製作所製、オートグラフＡＧＳ－２０００Ｂ）を用いた。引張試験機により無端ベルトの試料を、長さ方向に一定引張速度で引っ張ったときの破断強度を、容量１ｋＮのロードセルを用い測定した。実施例の場合の引張速度は、３５０ｍｍ／ｍｉｎ一定とした。比較例の場合の引張速度は、変位５０ｍｍまで２６．３ｍｍ／ｍｉｎ、変位５０ｍｍ超から２６３ｍｍ／ｍｉｎとした。測定温度は、２５℃、４０℃、６０℃、８０℃の４条件とし、該当する温度環境に試料を１時間放置した後に引張試験を行った。測定した破断強度から得た判断強度指数を表１に示す。破断強度指数は、下記計算式によって算出した。指数が大きいほど破断強度に優れることを示す。
（破断強度指数）＝（実施例の破断強度）／（比較例の破断強度）×１００
Figure JPOXMLDOC01-appb-T000001
　破断強度指数の算出に用いた破断強度はそれぞれ、実施例は３個、比較例は４個の測定値の平均値とした。本表より、すべての条件において、実施例の破断強度が、比較例を上回ることが確認された。実施例の無端ベルトは、８０℃の場合の１個を除き、ベルト本体が破断した。このことから実施例の無端ベルトは、ベルト本体と結合部が化学結合によってより強固に結合していることにより、破断強度が高くなったと考えられる。一方、比較例の無端ベルトは、いずれもベルト本体と接合部の間で破断しており、融着によって接合されたベルト本体と接合部の接合強度が、ベルト本体に比べ劣っているため、破断強度が実施例に比べ低下したと考えられる。
２．第２実施形態
　次に、図９Ａ～Ｃを参照して第２実施形態について説明する。上記第１実施形態と同様の構成については同様の符号を付し、説明を省略する。図９Ａに示す帯状ベルト１０Ｂは、補強布１８と、ベルト本体１２と、第１結合部１４Ｂと、第２結合部１６Ｂとを備える。第１結合部１４Ｂは、第１接合面２１においてベルト本体１２の第１端面３７と接合している。第２結合部１６Ｂは、第２接合面２３においてベルト本体１２の第２端面３９と接合している。第１接合面２１と第２接合面２３は、端部へ向かうにしたがって厚みが漸減するテーパ状である。本図の場合、第１接合面２１と第２接合面２３は、端部へ向かうにしたがって前記補強布１８方向へ傾斜するテーパ状である。
　第１先端部１７と第２先端部１９を融着させて一体とすることによって、図９Ｂに示すように、結合部４０Ｂが形成される。結合部４０Ｂを介して第１端面３７と第２端面３９が結合され、無端ベルト４２Ｂが形成される。
　本実施形態の帯状ベルト１０Ｂ及び無端ベルト４２Ｂは、上記第１実施形態の「（製造方法）」に記載した手順と同様の手順で製造することができる。すなわち、金型としての円筒状ドラム２０の表面に、補強布１８となる補強シートを巻き付ける。次いで、上記熱可塑性樹脂で形成され、第１結合部１４Ｂ及び第２結合部１６Ｂとなる帯状の熱可塑性樹脂シートを、前記補強シートの表面であって、前記ドラムの軸方向に配置する。帯状の熱可塑性樹脂シートの長辺は、端部に向かうにしたがって厚みが漸減し、補強シート方向へ傾斜するテーパ状である。
　次に、上記未加硫ゴムシートを巻き付けて、未加硫積層体を形成する。次いで、未加硫積層体を加熱加圧条件下で、加硫成形する。所定時間経過後、冷却し、補強シート２２上に、熱可塑性樹脂が固化した結合層２５と、加硫ゴムが固化したベルト本体層３０とを有する加硫積層体３４Ｂを得る（図９Ｃ）。加硫積層体３４Ｂは、未加硫ゴムシートが架橋剤によって加硫するとともに、架橋剤を介して加硫ゴムと熱可塑性樹脂が化学結合をしている。加硫積層体３４Ｂは、結合層２５が設けられている部分が、軸方向にわたって半径方向に突出した凸条３５Ｂが形成されている。
　続いて、加硫積層体３４Ｂの外周を図中Ｃの位置まで研磨し、前記凸条３５Ｂを除去する。上記のようにして得られた加硫積層体３４Ｂを所定の幅で環状に切断することにより、１次無端ベルトを得ることができる。１次無端ベルトは、結合部４０Ｂを介して、ベルト本体１２の第１端面３７と第２端面３９が結合されている。以上のようにして得られた１次無端ベルトにおいて、結合部４０Ｂを厚さ方向に切断し、当該結合部４０Ｂを第１結合部１４Ｂと第２結合部１６Ｂに分離することにより、図９Ａに示す帯状ベルト１０Ｂを得ることができる。
　本実施形態の帯状ベルト１０Ｂ及び無端ベルト４２Ｂは、熱可塑性樹脂と加硫ゴムが化学結合をしているので、上記第１実施形態と同様の効果を得ることができる。さらに本実施形態の場合、第１接合面２１及び第２接合面２３が端部へ向かうにしたがって前記補強布１８方向へ傾斜するテーパ状であるので、第１結合部１４Ｂ及び第２結合部１６Ｂと、ベルト本体１２の第１端面３７及び第２端面３９との接合面積が増加する。したがって帯状ベルト１０Ｂ及び無端ベルト４２Ｂは、破断強度をより向上することができる。
　上記第２実施形態の場合、第１接合面２１と第２接合面２３は、端部へ向かうにしたがって前記補強布１８方向へ傾斜するテーパ状である場合について説明したが本発明はこれに限らない。第１接合面２１と第２接合面２３は、傾斜方向が図９Ａ～Ｃに示した形態と逆側、すなわち端部へ向かうにしたがって補強布１８から離れる方向へ傾斜するテーパ状であってもよい。この場合、製造工程において用いる帯状の熱可塑性樹脂シートの長辺は、端部に向かうにしたがって厚みが漸減し、補強シートとから離れる方向へ傾斜するテーパ状である。未加硫ゴムシートの長辺は、熱可塑性樹脂シートの長辺と相補的なテーパ状とする。すなわち未加硫ゴムシートの長辺は、端部へ向かうにしたがって厚みが漸減し、補強シート方向へ傾斜するテーパ状である。未加硫ゴムシートの長辺同士の間に、熱可塑性樹脂シートを配置し、加熱加圧条件下で加硫成形することによって、加硫ゴムと熱可塑性樹脂シートが化学結合した加硫積層体が得られる。当該加硫積層体を所定の幅で環状に切断することによって、１次無端ベルトを得ることができる。このようにして得られた帯状ベルト及び無端ベルトは、ベルト本体の第１端面及び第２端面との接合面積が増加するので、上記第２実施形態と同様の効果を得ることができる。
　３．第３実施形態
　次に、図１０Ａ～Ｃを参照して第３実施形態について説明する。上記第１実施形態と同様の構成については同様の符号を付し、説明を省略する。図１０Ａに示す帯状ベルト１０Ｃは、補強布１８と、ベルト本体２９と、第１結合部１４Ａと、第２結合部１６Ａとを備える。ベルト本体２９の一端は、第１結合部１４Ａの端部に接触する第１端面１３と、補強布１８と接する面と反対側の第１結合部１４Ａの表面（一側面）を覆うように、前記ベルト本体２９の一部が延伸した第１延長部３１とが形成されている。ベルト本体２９の他端は、第２結合部１６Ａの端部に接触する第２端面１５と、補強布１８と接する第２結合部１６Ａの表面と反対側の面（一側面）を覆うように、前記ベルト本体２９の一部が延伸した第２延長部３３とが形成されている。
　第１先端部１７と第２先端部１９を融着させて一体とすることによって、図１０Ｂに示すように、結合部４０Ａが形成される。結合部４０Ａを介して第１端面１３を含む一端と、第２端面１５を含む他端が結合され、無端ベルト４２Ｃが形成される。第１延長部３１と第２延長部３３の先端同士は接触している。
　本実施形態の帯状ベルト１０Ｃ及び無端ベルト４２Ｃは、上記第１実施形態の「（製造方法）」に記載した手順と同様の手順で製造することができる。すなわち、金型としての円筒状ドラムの表面に、補強布１８となる補強シートを巻き付ける。次いで、上記熱可塑性樹脂で形成され、第１結合部１４Ａ及び第２結合部１６Ａとなる帯状の熱可塑性樹脂シートを、前記補強シートの表面であって、前記ドラムの軸方向に配置する。帯状の熱可塑性樹脂シートの厚さは、未加硫ゴムシートの厚さより薄い。
　次に、上記未加硫ゴムシートを巻き付けて、未加硫積層体を形成する。次いで、未加硫積層体を加熱加圧条件下で、加硫成形する。所定時間経過後、冷却し、補強シート２２上に、熱可塑性樹脂が固化した結合層３２と、加硫ゴムが固化したベルト本体層３０とを有する加硫積層体３４Ｃを得る（図１０Ｃ）。加硫積層体３４Ｃは、未加硫ゴムシートが架橋剤によって加硫するとともに、架橋剤を介して加硫ゴムと熱可塑性樹脂が化学結合をしている。加硫積層体３４Ｃは、結合層３２が設けられている部分が、軸方向にわたって半径方向に突出した凸条３５Ｃが形成されている。
　続いて、加硫積層体３４Ｃの外周を図中Ｃの位置まで研磨し、前記凸条３５Ｃを除去する。上記のようにして得られた加硫積層体３４Ｃを所定の幅で環状に切断することにより、１次無端ベルトを得ることができる。１次無端ベルトは、結合部４０Ａを介して、ベルト本体２９の第１端面１３を含む一端と、第２端面１５を含む他端が結合されている。以上のようにして得られた１次無端ベルトにおいて、結合部４０Ａを厚さ方向に切断し、当該結合部４０Ａを第１結合部１４Ａと第２結合部１６Ｂに分離することにより、図１０Ａに示す帯状ベルト１０Ｃを得ることができる。
　本実施形態の帯状ベルト１０Ｃ及び無端ベルト４２Ｃは、熱可塑性樹脂と加硫ゴムが化学結合をしているので、上記第１実施形態と同様の効果を得ることができる。さらに本実施形態の場合、第１延長部３１と第２延長部３３が第１結合部１４Ａ及び第２結合部１６Ａの補強布１８と接する面と反対側の面を覆い、化学結合していることによって、ベルト本体２９の第１端面１３及び第２端面１５と結合部４０Ａとの接合面においてクラックが生じることを抑制することができる。したがって帯状ベルト１０Ｃ及び無端ベルト４２Ｃは、耐屈曲性を向上することができる。また、本実施形態と上記第２実施形態とを組み合わせることによって、耐屈曲性と破断強度とを有した帯状ベルト及び無端ベルトを得ることができる。
４．変形例
　本発明は上記実施形態に限定されるものではなく、本発明の趣旨の範囲内で適宜変更することが可能である。
　上記実施形態の場合、１次無端ベルトを作製し、当該１次無端ベルトを帯状ベルト１０Ａ、１０Ｂ、１０Ｃとする場合について説明したが、本発明はこれに限らない。図１１に示すように、金型として平金型５０を用いて帯状ベルト１０Ａ、１０Ｂ、１０Ｃを形成してもよい。本図の場合、平金型５０の表面に、補強シート２２を敷き、当該補強シート２２の両端にそれぞれ帯状の熱可塑性樹脂シート２４を配置し、その上に未加硫ゴムシート２６を重ねて、平板状の未加硫積層体５２を得る。次いで、未加硫積層体５２を加熱し、加硫成形することにより、加硫積層体（図示しない）を得る。続いて、加硫積層体の両端部に形成された凸条を、研磨によって除去する。上記のようにして得られた加硫積層体を所定の幅で帯状に切断することにより、帯状ベルト１０Ａ（図１）を得ることができる。熱可塑性樹脂シート２４の長辺を端部に向かうにしたがって厚みが漸減し、補強シート方向へ傾斜するテーパ状とすることによって、帯状ベルト１０Ｂ（図９Ａ）を得ることができる。また熱可塑性樹脂シート２４の厚さを未加硫ゴムシートの厚さより薄くすることによって帯状ベルト１０Ｃ（図１０Ａ）を得ることができる。本変形例のように、１次無端ベルトを経ずに形成された帯状ベルト１０Ａ、１０Ｂ、１０Ｃは、第１結合部１４Ａ、１４Ｂと第２結合部１６Ａ、１６Ｂを融着することにより、無端ベルト４２Ａ、４２Ｂ、４２Ｃを得ることができる。
　上記実施形態の場合、１次無端ベルトを帯状ベルト１０Ａ、１０Ｂ、１０Ｃとして使用する場合について説明したが、本発明はこれに限らない。無端ベルトを交換する際に時間的な余裕がある場合は、例えば自動改札機から搬送装置を取り外して、使用済の無端ベルトを１次無端ベルトに交換してもよい。
　上記実施形態の場合、未加硫ゴムシート２６の端部は、熱可塑性樹脂シート２４の幅方向端部を厚さ方向に重ねて配置されている場合について説明したが、本発明はこれに限らず、端面同士を接触させて配置してもよい。
　上記実施形態の場合、帯状ベルト１０Ａ、１０Ｂ、１０Ｃ及び無端ベルト４２Ａ、４２Ｂ、４２Ｃは、補強布を有する場合について説明したが、本発明はこれに限らず、補強布１８を省略してもよい。
１０Ａ、１０Ｂ、１０Ｃ  帯状ベルト
１２、２９      ベルト本体
１３    第１端面
１４Ａ、１４Ｂ  第１結合部
１５    第２端面
１６Ａ、１６Ｂ  第２結合部
１７    第１先端部
１８    補強布
１９    第２先端部
２０    ドラム（金型）
２２    補強シート
２４    熱可塑性樹脂シート
２６    未加硫ゴムシート
２８    未加硫積層体
３４Ａ、３４Ｂ、３４Ｃ  加硫積層体
３８    無端ベルト
４０Ａ、４０Ｂ  結合部
４２Ａ、４２Ｂ、４２Ｃ  無端ベルト
５０    平金型（金型）
５２    未加硫積層体

Claims (13)

  1. 金型表面に、
    熱可塑性樹脂で形成され、結合部となる帯状の熱可塑性樹脂シートと、
    未加硫ゴムと、前記未加硫ゴム及び前記熱可塑性樹脂と共有結合する架橋剤とを含み、ベルト本体となる未加硫ゴムシートとを、
    端部同士が接触した状態で配置して未加硫積層体を得る積層体形成工程と、
    前記未加硫積層体を加硫成形する加硫成形工程と
    を備える帯状ベルトの製造方法。
  2. 前記加硫成形工程で得られた加硫積層体の表面を研磨する研磨工程を備える請求項１に記載の帯状ベルトの製造方法。
  3. 前記積層体形成工程は、
    前記金型表面に配置された補強布となる補強シート上に、
    前記熱可塑性樹脂シートと、前記未加硫ゴムシートとを、
    端部同士が接触した状態で、前記補強シート上の同一面上に配置する
    請求項１又は２に記載の帯状ベルトの製造方法。
  4. 前記結合部は、前記ベルト本体の一端側に設けられた第１結合部と、前記ベルト本体の他端側に設けられた第２結合部である請求項１～３のいずれか１項に記載の帯状ベルトの製造方法。
  5. 請求項４に記載の製造方法で製造された帯状ベルトを搬送装置に装着後、前記第１結合部と前記第２結合部を融着し、無端状とする工程を備える無端ベルトの製造方法。
  6. 加硫ゴムで形成された帯状のベルト本体、及び、前記ベルト本体の一端に設けられた第１結合部と、前記ベルト本体の他端に設けられた第２結合部と
    を備え、
    熱可塑性樹脂で形成され、前記第１結合部及び前記第２結合部となる少なくとも１つの熱可塑性樹脂シートと、
    未加硫ゴムと、前記未加硫ゴム及び前記熱可塑性樹脂と共有結合する架橋剤とを含み、前記ベルト本体となる未加硫ゴムシートとを、
    前記熱可塑性樹脂シートの端部と前記未加硫ゴムシートの端部が接触した状態で、加硫成形して得た帯状ベルト。
  7. 前記ベルト本体の一端と接する前記第１結合部の接合面、前記ベルト本体の他端と接する前記第２結合部の接合面は、端部へ向かうにしたがって厚みが漸減するテーパ状である請求項６に記載の帯状ベルト。
  8. 前記第１結合部及び前記第２結合部の一側面に、前記ベルト本体の一部が延伸している請求項６又は７に記載の帯状ベルト。
  9. 前記ベルト本体、及び前記第１結合部と前記第２結合部は、補強布上に設けられた請求項６～８のいずれか１項に記載の帯状ベルト。
  10. 加硫ゴムで形成された帯状のベルト本体、及び、前記ベルト本体の両端部の間に設けられた結合部と
    を備え、
    熱可塑性樹脂で形成され、前記結合部となる熱可塑性樹脂シートと、
    未加硫ゴムと、前記未加硫ゴム及び前記熱可塑性樹脂と共有結合する架橋剤とを含み、前記ベルト本体となる未加硫ゴムシートとを、
    前記熱可塑性樹脂シートの端部と前記未加硫ゴムシートの端部が接触した状態で、加硫成形して得た無端ベルト。
  11. 前記ベルト本体と接する前記結合部の両側の接合面は、端部へ向かうにしたがって厚みが漸減するテーパ状である請求項１０に記載の無端ベルト。
  12. 前記結合部の一側面に、前記ベルト本体の一部が延伸している請求項１０又は１１に記載の無端ベルト。
  13. 前記ベルト本体、及び前記結合部は、補強布上に設けられた請求項１０～１２のいずれか１項に記載の無端ベルト。
PCT/JP2018/036081 2017-11-21 2018-09-27 帯状ベルト、無端ベルト、及びその製造方法 WO2019102713A1 (ja)

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TW201925642A (zh) 2019-07-01
CN111372762A (zh) 2020-07-03
EP3715099A4 (en) 2021-08-11
US11214441B2 (en) 2022-01-04
US20200283232A1 (en) 2020-09-10
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CN111372762B (zh) 2022-10-04
EP3715099A1 (en) 2020-09-30

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