JP4972434B2 - Flat belt fusion jig and fusion press device - Google Patents

Flat belt fusion jig and fusion press device Download PDF

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Publication number
JP4972434B2
JP4972434B2 JP2007063509A JP2007063509A JP4972434B2 JP 4972434 B2 JP4972434 B2 JP 4972434B2 JP 2007063509 A JP2007063509 A JP 2007063509A JP 2007063509 A JP2007063509 A JP 2007063509A JP 4972434 B2 JP4972434 B2 JP 4972434B2
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Prior art keywords
belt material
fusion
rubber sheet
jig
thermoplastic resin
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JP2007063509A
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JP2008221630A (en
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武士 窪田
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Nitta Corp
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Nitta Corp
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    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/342—Preventing air-inclusions
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • 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
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B29C66/0044—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on the joining tool
    • 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
    • B29C66/01—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
    • B29C66/11—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
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/22—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns
    • B29C66/223—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being in the form of recurring patterns being in the form of a triangle wave or of a sawtooth wave, e.g. zigzagged
    • 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
    • B29C66/40—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
    • B29C66/4322—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 by joining a single sheet to itself
    • 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
    • B29C66/40—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
    • 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
    • B29C66/40—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
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • 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
    • B29C66/739—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
    • B29C66/73921—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 characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8163—Self-aligning to the joining plane, e.g. mounted on a ball and socket
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8324—Joining or pressing tools pivoting around one axis
    • B29C66/83241—Joining or pressing tools pivoting around one axis cooperating pivoting tools
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/855—Belt splicing machines
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/861—Hand-held tools
    • B29C66/8614—Tongs, pincers or scissors
    • 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
    • B29C66/731—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 intensive physical properties of the material of the parts to be joined
    • B29C66/7316—Surface properties
    • B29C66/73161—Roughness or rugosity
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8227—Transmission mechanisms using springs
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/828—Other pressure application arrangements
    • B29C66/8286—Hand placed clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/709—Articles shaped in a closed loop, e.g. conveyor belts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

本発明は、搬送装置あるいは動力伝達装置の一部として用いられる平ベルトに関し、より詳しくは、長尺のベルト材料の両端部を融着して無端状の平ベルトを成形するための融着用治具および融着プレス装置に関する。   The present invention relates to a flat belt used as a part of a conveying device or a power transmission device, and more particularly, a fusion treatment for forming an endless flat belt by fusing both ends of a long belt material. The present invention relates to a tool and a fusion press apparatus.

従来平ベルトとして、長尺のベルト材料を所望の長さに切断し、両端部を突合せた状態で、治具によって突合せ部分を挟み、融着プレス装置によって治具の上下面を加熱加圧して無端状に成形するものが知られている。すなわち、ベルト材料は熱可塑性樹脂から成る層を有しており、突合せ部分の熱可塑性樹脂同士が融着して連結され、無端状に成形される。   Conventionally, as a flat belt, a long belt material is cut to a desired length, both ends are abutted, the abutting part is sandwiched by a jig, and the upper and lower surfaces of the jig are heated and pressed by a fusion press device. What is shaped into an endless shape is known. That is, the belt material has a layer made of a thermoplastic resin, and the thermoplastic resins at the butt portion are fused and connected to each other to be formed into an endless shape.

ベルト材料の突合せ部分は一対の金属プレートにより挟まれた状態で加熱加圧されるが、この加熱によってベルト材料の熱可塑性樹脂に含まれる水分や、熱により発生するガス等が気泡となり、ベルトの内部あるいは表面に発生することがある。このような気泡はベルトの接合部における外観不良を招くだけでなく、肉厚が減少するために強度低下の原因にもなる。そこで従来、特許文献１に開示されているように、離型紙をベルト材料の突合せ部分と金属プレートの間に挟んで加熱加圧し、水分等を除去する構成が提案されている。
特開平１１−３４８１２５号公報 The butt portion of the belt material is heated and pressurized while being sandwiched between a pair of metal plates, but due to this heating, moisture contained in the thermoplastic resin of the belt material, gas generated by heat, etc. become bubbles, and the belt May occur inside or on the surface. Such bubbles not only cause poor appearance at the belt joint, but also cause a reduction in strength because the thickness is reduced. Therefore, as disclosed in Patent Document 1, a configuration has been proposed in which a release paper is sandwiched between a butt portion of a belt material and a metal plate and heated and pressurized to remove moisture and the like.
JP 11-348125 A

離型紙は例えばシリコンを用いて離型処理したものであり、ベルト材料に対して適切に加熱加圧するためには、その厚さを所定の範囲内に収めるように管理しなければならず、取り扱いは簡単ではない。   The release paper is one that has been released using, for example, silicon. In order to heat and press the belt material appropriately, its thickness must be controlled so that it falls within a predetermined range. Is not easy.

本発明は、ベルト材料の突合せ部分の融着作業において、離型紙を用いることなく簡単な構成で、突合せ部分に気泡が発生するのを防止する融着用治具および融着プレス装置を提供することを目的としている。   The present invention provides a fusing jig and a fusing press device that prevent the generation of bubbles in the abutting portion with a simple configuration without using a release paper in the fusing operation of the abutting portion of the belt material. It is an object.

本発明に係る平ベルトの融着用治具は、熱可塑性樹脂層を有する長尺のベルト材料の両端部を突合せた状態で、その両端部の突合せ部分を加熱加圧するために、突合せ部分を覆って保持するものであり、突合せ部分が係合して保持される溝を有する下型と、下型に係合された突合せ部分の上面に載置され、加熱された状態で熱可塑性樹脂層に接着しない性質を有するゴムシートと、ゴムシートの上面に載置される上型とを備え、ゴムシートの上面に、凹凸が形成されていることを特徴としている。   The flat belt fusion jig according to the present invention covers the butted portion in order to heat and press the butted portions of both ends of the long belt material having the thermoplastic resin layer butted. The lower mold having a groove that is engaged and held by the abutting portion and the upper surface of the abutting portion engaged with the lower die, and is heated on the thermoplastic resin layer. A rubber sheet having a property of not being bonded and an upper mold placed on the upper surface of the rubber sheet are provided, and unevenness is formed on the upper surface of the rubber sheet.

ゴムシートの上面の凹凸は、例えばサンドブラストを用いた表面処理により形成される。また凹凸はローレット加工により形成されてもよい。ゴムシートは、好ましくはシリコンシートである。   The unevenness on the upper surface of the rubber sheet is formed by surface treatment using, for example, sandblasting. The unevenness may be formed by knurling. The rubber sheet is preferably a silicon sheet.

また本発明に係る平ベルトの融着プレス装置は、熱可塑性樹脂層を有する長尺のベルト材料の両端部を突合せた状態で、両端部が係合して保持される溝を有する下型と、下型に係合された突合せ部分の上面に載置され、加熱された状態で熱可塑性樹脂層に接着しない性質を有するゴムシートと、ゴムシートの上面に載置される上型と、下型と上型を加熱するための一対の加熱板と、一対の加熱板により突合せ部分を加圧するように付勢する加圧手段とを備え、ゴムシートの上面に、凹凸が形成されていることを特徴としている。   Further, the flat belt fusion press device according to the present invention includes a lower mold having a groove that is engaged and held at both ends in a state where both ends of a long belt material having a thermoplastic resin layer are butted. A rubber sheet placed on the upper surface of the butted portion engaged with the lower mold and having the property of not being bonded to the thermoplastic resin layer in a heated state; an upper mold placed on the upper surface of the rubber sheet; Provided with a pair of heating plates for heating the mold and the upper mold, and pressurizing means for urging the butt portion to be pressed by the pair of heating plates, and unevenness is formed on the upper surface of the rubber sheet It is characterized by.

本発明によれば、ベルト材料の突合せ部分の融着作業において、離型紙を用いることなく簡単な構成で、突合せ部分に気泡が発生するのを防止することができるという効果が得られる。   According to the present invention, in the fusion work of the butt portion of the belt material, it is possible to prevent the generation of bubbles in the butt portion with a simple configuration without using release paper.

以下、本発明の実施の形態を、図面を参照して説明する。
図１および図２は、無端状の平ベルトを成形するために、長尺のベルト材料１０の両端部１１、１２を突合せて融着させるときの治具とベルト材料の位置関係を示している。ベルト材料１０はいくつかの層から成り、最外層が熱可塑性樹脂によって構成されることもあり、また中間層が熱可塑性樹脂層であることもある。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 and FIG. 2 show the positional relationship between the jig and the belt material when the end portions 11 and 12 of the long belt material 10 are abutted and fused to form an endless flat belt. . The belt material 10 is composed of several layers, the outermost layer may be made of a thermoplastic resin, and the intermediate layer may be a thermoplastic resin layer.

ベルト材料１０の融着作業では、下型２１と上型２２から成る治具が用いられる。下型２１には、ベルト材料１０が係合する溝２３が形成されている。溝２３は、ベルト材料１０と略同じ幅を有して直線的に延び、溝２３の両端は開放している。この明細書では、溝２３が延びる方向（図１における横方向）を治具（下型２１と上型２２）の長手方向と呼ぶ。   In the fusion work of the belt material 10, a jig composed of a lower die 21 and an upper die 22 is used. The lower mold 21 has a groove 23 with which the belt material 10 is engaged. The groove 23 has substantially the same width as the belt material 10 and extends linearly, and both ends of the groove 23 are open. In this specification, the direction in which the groove 23 extends (lateral direction in FIG. 1) is referred to as the longitudinal direction of the jig (the lower mold 21 and the upper mold 22).

ベルト材料１０の両端部１１、１２は切断されて例えば鋸歯状に成形され、ベルト材料１０は、一方の端部の鋸歯の谷部が他方の端部の鋸歯の山部に係合するようにして下型２１の溝２３に嵌め込まれる（図１参照）。両端部１１、１２の鋸歯が係合した状態において、ベルト材料１０の突合せ部分１３の上下の面は平面状であり、鋸歯間に隙間は形成されない（図２参照）。   Both end portions 11 and 12 of the belt material 10 are cut and formed into, for example, a sawtooth shape, and the belt material 10 is arranged so that the trough portion of the serration at one end engages the crest portion of the sawtooth at the other end. And is fitted into the groove 23 of the lower mold 21 (see FIG. 1). In a state where the saw teeth of both end portions 11 and 12 are engaged, the upper and lower surfaces of the butted portion 13 of the belt material 10 are flat, and no gap is formed between the saw teeth (see FIG. 2).

溝２３内において、ベルト材料１０の突合せ部分１３の上側にはシリコンシート２４が載置される。シリコンシート２４は溝２３に係合する矩形状を有し、溝２３と略同じ幅および長さを有する。溝２３の深さは、ベルト材料１０の厚さとシリコンシート２４の厚さを合わせた分よりも若干大きく、突合せ部分１３とシリコンシート２４が溝２３内に配置された状態において、シリコンシート２４の上面は下型２１の上面よりも少し凹陥する。上型２２は、その凹陥部分に載置され、これにより突合せ部分１３が下型２１と上型２２により覆われる。   In the groove 23, a silicon sheet 24 is placed on the upper side of the butted portion 13 of the belt material 10. The silicon sheet 24 has a rectangular shape that engages with the groove 23, and has substantially the same width and length as the groove 23. The depth of the groove 23 is slightly larger than the sum of the thickness of the belt material 10 and the thickness of the silicon sheet 24. In the state where the butted portion 13 and the silicon sheet 24 are disposed in the groove 23, The upper surface is slightly recessed from the upper surface of the lower mold 21. The upper die 22 is placed in the recessed portion, and the butted portion 13 is thereby covered by the lower die 21 and the upper die 22.

ベルト材料１０の突合せ部分１３とシリコンシート２４が溝２３内に係合され、その上に上型２２が載置された状態において、治具の長手方向の両端部がクリップ（図示せず）によって挟持されることが好ましい。このようにしてベルト材料１０の両端部１１、１２が治具によって覆われ保持された状態で、治具すなわち上型２２の上面と下型２１の下面は、後述するプレス器具によって加熱加圧される。   In a state where the butted portion 13 of the belt material 10 and the silicon sheet 24 are engaged in the groove 23 and the upper mold 22 is placed thereon, both ends in the longitudinal direction of the jig are clipped (not shown). It is preferable to be sandwiched. In this manner, with the both end portions 11 and 12 of the belt material 10 covered and held by the jig, the upper surface of the jig, that is, the upper die 22 and the lower surface of the lower die 21 are heated and pressurized by a press tool described later. The

図３および図４はプレス器具の一例を示している。なお図４においてベルト材料は省略されている。
プレス器具６０は治具の上面と下面を加熱加圧するための一対の加熱板６４、６５を備える。加熱板６４、６５はそれぞれ矩形の板部材であり、同じ形状を有している。下側の加熱板６４はピボット部６６によって下側支持部材６１に枢支され、また上側の加熱板６５はピボット部６７によって上側支持部材６２に枢支されている。下側支持部材６１と上側支持部材６２は、支持部材６１、６２の側面に形成されたフランジ７１、７２を貫通するピン６３によって回動自在に連結されている。 3 and 4 show an example of a press device. In FIG. 4, the belt material is omitted.
The press device 60 includes a pair of heating plates 64 and 65 for heating and pressing the upper and lower surfaces of the jig. The heating plates 64 and 65 are rectangular plate members, and have the same shape. The lower heating plate 64 is pivotally supported on the lower support member 61 by the pivot portion 66, and the upper heating plate 65 is pivotally supported on the upper support member 62 by the pivot portion 67. The lower support member 61 and the upper support member 62 are rotatably connected by pins 63 that pass through flanges 71 and 72 formed on the side surfaces of the support members 61 and 62.

支持部材６１、６２の基部は、手で握り易くするように相対的に細く、ハンドル部６１ａ、６２ａとして成形されている。支持部材６１、６２の内部には電力を供給されることによって発熱するヒータ（図示せず）が収容されており、下側支持部材６１のハンドル部６１ａからは、ヒータに電力を供給するための電源ケーブル６８が延びている。支持部材６１、６２は図示しないバネによって、常時、加熱板６４、６５が密着する方向に付勢されている。   The base portions of the support members 61 and 62 are relatively thin so as to be easily grasped by hand, and are formed as handle portions 61a and 62a. A heater (not shown) that generates heat when electric power is supplied is accommodated in the support members 61 and 62, and power is supplied to the heater from the handle portion 61 a of the lower support member 61. A power cable 68 extends. The support members 61 and 62 are always urged by a spring (not shown) in a direction in which the heating plates 64 and 65 are in close contact with each other.

ベルト材料１０の突合せ部分１３を融着するとき、作業者はハンドル部６１ａ、６２ａを握って支持部材６１、６２を開放させ、加熱板６４、６５の間に、ベルト材料１０を保持した治具を挿入する（図３参照）。このとき治具は、フランジ７２の加熱板６５の側に形成されたガイド部７３に係合するように治具を取付ける。ガイド部７３は、治具の縁部２５が係合することにより、ベルト材料１０の幅方向の中心が加熱板６４、６５の幅方向の中心に合致するように成形されている。   When fusing the butted portion 13 of the belt material 10, the operator holds the handle members 61 a and 62 a to open the support members 61 and 62, and the jig holds the belt material 10 between the heating plates 64 and 65. Is inserted (see FIG. 3). At this time, the jig is attached so as to engage with the guide portion 73 formed on the heating plate 65 side of the flange 72. The guide portion 73 is formed so that the center in the width direction of the belt material 10 matches the center in the width direction of the heating plates 64 and 65 when the edge portion 25 of the jig is engaged.

ここで図示しない電源スイッチがオン状態に切り換えられ、ヒータが通電されて発熱する。上述したようにベルト材料１０と加熱板６４、６５の中心が合わせられているので、突合せ部分１３は均一に加熱加圧され、熱可塑性樹脂層同士が融着して、無端状のベルトが成形される。   Here, a power switch (not shown) is turned on, and the heater is energized to generate heat. Since the centers of the belt material 10 and the heating plates 64 and 65 are aligned as described above, the butt portion 13 is uniformly heated and pressurized, the thermoplastic resin layers are fused together, and an endless belt is formed. Is done.

このようにして成形される無端状のベルトは例えば搬送用として使用され、搬送面すなわち上面１５（図２参照）には、所定の大きさの摩擦係数を有するように全体的に粗面として成形され、細かい凹凸が形成されている。このような粗面が無端状のベルトが成形された後にも突合せ部分１３において維持されるようにするため、つまり突合せ部分１３の上面１５の凹凸が融着によって消滅しないようにするため、シリコンシート２４の下面２４ａすなわちベルト材料１０に密着する面には、ベルト材料１０と実質的に同じ粗面である目付け（凹凸）が形成されている。   The endless belt formed in this way is used for conveyance, for example, and the conveyance surface, that is, the upper surface 15 (see FIG. 2) is molded as a rough surface as a whole so as to have a predetermined coefficient of friction. As a result, fine irregularities are formed. In order to maintain such a rough surface in the butt portion 13 even after the endless belt is formed, that is, in order to prevent the unevenness of the upper surface 15 of the butt portion 13 from disappearing by fusion, a silicon sheet On the lower surface 24 a of 24, that is, the surface that is in close contact with the belt material 10, fabric weight (unevenness) that is substantially the same rough surface as the belt material 10 is formed.

したがって融着工程において、シリコンシート２４の目付けがベルト材料１０の表面に転写され、無端状に成形されたベルトの表面には、全周にわたって均一な粗面が形成されることとなる。   Therefore, in the fusing process, the basis weight of the silicon sheet 24 is transferred to the surface of the belt material 10, and a uniform rough surface is formed on the entire surface of the endlessly formed belt surface.

本実施形態において融着作業は、図３、４に示すような、構造が比較的簡単なプレス器具６０を用いて行われる。このようなプレス器具６０による融着は大規模なプレス装置と比較して、相対的に低い圧力で行われ、融着後の突合せ部分１３には、ベルト材料１０の熱可塑性樹脂層に含まれる水分や、熱により発生するガスによって、気泡が発生することがある。このような気泡は無端状ベルトの強度不足の原因になるため、本実施形態では、気泡の発生を抑える手段を講じている。   In this embodiment, the fusion work is performed using a press device 60 having a relatively simple structure as shown in FIGS. Such fusion by the press device 60 is performed at a relatively low pressure as compared with a large-scale press apparatus, and the butt portion 13 after the fusion is included in the thermoplastic resin layer of the belt material 10. Bubbles may be generated by moisture or gas generated by heat. Since such bubbles cause insufficient strength of the endless belt, in the present embodiment, means for suppressing the generation of bubbles is taken.

すなわち本実施形態では、シリコンシート２４の上面２４ｂすなわち上型２２に密着する面にも、上面２４ａと同様に、全面にわたって凹凸が形成されている。換言すれば、シリコンシート２４の両面は同様な粗面である。シリコンシート２４の上面２４ｂの凹凸は例えばサンドブラストを用いた表面処理により形成されるが、このような粗面に限定されず、ローレット加工により形成されてもよい。   That is, in the present embodiment, the upper surface 24b of the silicon sheet 24, that is, the surface that is in close contact with the upper mold 22, is also provided with unevenness over the entire surface, like the upper surface 24a. In other words, both surfaces of the silicon sheet 24 are similar rough surfaces. The unevenness of the upper surface 24b of the silicon sheet 24 is formed by, for example, surface treatment using sandblasting, but is not limited to such a rough surface, and may be formed by knurling.

シリコンシート２４の上面２４ｂに全体的に凹凸が形成されていると、そうでない場合と比較して、気泡の発生が顕著に抑えられることが実験により確認された。実験によると、凹凸の大きさは気泡発生の抑制にほとんど影響せず、凹凸の有無が大きく影響する。また、シリコンシート２４の上面２４ｂに治具の長手方向のみに延びる複数の溝を形成した場合と、治具の幅方向のみに延びる複数の溝を形成した場合とを実験により比較したところ、前者の場合は気泡が発生したが、後者の場合は気泡の発生が抑制されることが確認された。   It has been confirmed by experiments that the formation of air bubbles can be remarkably suppressed when the unevenness is formed entirely on the upper surface 24b of the silicon sheet 24 as compared with the case where the surface is not so. According to experiments, the size of the unevenness hardly affects the suppression of bubble generation, and the presence or absence of the unevenness greatly affects. Moreover, when the case where a plurality of grooves extending only in the longitudinal direction of the jig is formed on the upper surface 24b of the silicon sheet 24 and the case where a plurality of grooves extending only in the width direction of the jig are formed by experiment, the former is compared. In the case of, bubbles were generated, but in the latter case, it was confirmed that the generation of bubbles was suppressed.

以上のことから、プレス器具６０による融着作業において、ベルト材料１０の熱可塑性樹脂から発生したガス等が、ベルト材料１０の縁と溝２３の側壁との間の隙間から出てシリコンシート２４の上面２４ｂに回りこみ、ベルト材料１０から除去されることが推察される。したがって気泡の発生を十分に抑えるには、ガスが大気中へ放出されるように、シリコンシート２４の上面２４ｂには治具の長手方向にも通じる通路があることが好ましく、下面２４ａと同様な凹凸が形成されるか、ローレット加工されることが好ましい。   From the above, in the fusing operation by the press device 60, gas or the like generated from the thermoplastic resin of the belt material 10 comes out of the gap between the edge of the belt material 10 and the side wall of the groove 23, and the silicon sheet 24 It is inferred that the wrap around the upper surface 24 b is removed from the belt material 10. Therefore, in order to sufficiently suppress the generation of bubbles, it is preferable that the upper surface 24b of the silicon sheet 24 has a passage leading to the longitudinal direction of the jig so that the gas is released into the atmosphere. It is preferable that irregularities are formed or knurled.

以上のように本実施形態によれば、融着工程においてベルト材料１０の内部に発生した水分やガスが大気に放出され、ベルトの内部に残留することがない。したがって、突合せ部分１３に気泡が生じることが防止され、突合せ部分１３において強度が不足することはない。   As described above, according to the present embodiment, moisture and gas generated in the belt material 10 in the fusing process are released to the atmosphere and do not remain in the belt. Therefore, bubbles are prevented from being generated in the butt portion 13, and the strength is not insufficient in the butt portion 13.

本実施形態のようなシリコンシート２４を用いた構成は非常に簡単であり、また離型紙のように厚さを正確に定める必要がなく、取り扱いが簡単である。   The configuration using the silicon sheet 24 as in the present embodiment is very simple, and it is not necessary to determine the thickness accurately unlike a release paper, and the handling is simple.

なおシリコンシート２４の表面に加工する凹凸は、細かなサンドブラストの#200程度のものから２mm角程度のローレット加工のような粗いものであってもよい。つまり、凹凸の細かさはあまり重要ではない。   The unevenness to be processed on the surface of the silicon sheet 24 may be rough, such as a knurling process of about 2 mm square from a fine sandblasting of about # 200. In other words, the fineness of the unevenness is not so important.

さらにシリコンシート２４を用いることは必須ではなく、ベルト材料１０の熱可塑性樹脂に対して、加熱された状態で接着しない性質を有するものであることが必須であり、このような性質を有するゴムシートであれば利用可能である。   Furthermore, the use of the silicon sheet 24 is not essential, and it is essential that the belt material 10 has a property of not being bonded to the thermoplastic resin in a heated state. If available.

ベルト材料の両端部を突合せる途中の状態を示す平面図である。It is a top view which shows the state in the middle of joining both ends of belt material. ベルト材料の両端部を突合せて融着するために、突合せ部分を治具に取り付ける状態を分解して示す斜視図である。It is a perspective view which decomposes | disassembles and shows the state which attaches a butt | matching part to a jig | tool, in order to butt | match and fuse | melt both ends of a belt material. プレス器具を示す斜視図である。It is a perspective view which shows a press instrument. 図３のプレス器具において治具を把持した状態を示す斜視図である。It is a perspective view which shows the state which hold | gripped the jig | tool in the press instrument of FIG.

符号の説明Explanation of symbols

１０ ベルト材料
１１、１２ 両端部
１３ 突合せ部
２１ 下型
２２ 上型
２４ シリコンシート（ゴムシート）
２４ｂ 上面 10 Belt material 11, 12 Both ends 13 Butt portion 21 Lower mold 22 Upper mold 24 Silicon sheet (rubber sheet)
24b upper surface

Claims (4)

熱可塑性樹脂層を有する長尺のベルト材料の両端部を突合せた状態で、前記両端部の突合せ部分を加熱加圧するために、前記突合せ部分を覆って保持する平ベルトの融着用治具であって、
前記突合せ部分が係合して保持される溝を有する下型と、
前記下型に係合された前記突合せ部分の上面に載置され、加熱された状態で前記熱可塑性樹脂層に接着しない性質を有するゴムシートと、
前記ゴムシートの上面に載置される上型とを備え、
前記ゴムシートの上面に、凹凸が形成されていることを特徴とする平ベルトの融着用治具。 A flat belt fusion jig that covers and holds the abutting portion in order to heat and press the abutting portion of the long belt material having a thermoplastic resin layer in a state of abutting the both ends of the belt material. And
A lower mold having a groove in which the butt portion is engaged and held;
A rubber sheet placed on the upper surface of the butted portion engaged with the lower mold and having a property of not being bonded to the thermoplastic resin layer in a heated state;
An upper mold placed on the upper surface of the rubber sheet,
A flat belt fusion jig, wherein unevenness is formed on an upper surface of the rubber sheet. 前記凹凸がサンドブラストを用いた表面処理により形成されることを特徴とする請求項１に記載の融着用治具。   The fusion jig according to claim 1, wherein the unevenness is formed by a surface treatment using sandblasting. 前記凹凸がローレット加工により形成されることを特徴とする請求項１に記載の融着用治具。   The fusion jig according to claim 1, wherein the unevenness is formed by knurling. 熱可塑性樹脂層を有する長尺のベルト材料の両端部を突合せた状態で、前記両端部の突合せ部分が係合して保持される溝を有する下型と、
前記下型に係合された前記突合せ部分の上面に載置され、加熱された状態で前記熱可塑性樹脂層に接着しない性質を有するゴムシートと、
前記ゴムシートの上面に載置される上型と、
前記下型と前記上型を加熱するための一対の加熱板と、
前記一対の加熱板により前記突合せ部分を加圧するように付勢する加圧手段とを備え、
前記ゴムシートの上面に、凹凸が形成されていることを特徴とする平ベルトの融着プレス装置。 In a state where both ends of the long belt material having a thermoplastic resin layer are butted, a lower mold having a groove that is engaged and held by the butted portions of the both ends,
A rubber sheet placed on the upper surface of the butted portion engaged with the lower mold and having a property of not being bonded to the thermoplastic resin layer in a heated state;
An upper mold placed on the upper surface of the rubber sheet;
A pair of heating plates for heating the lower mold and the upper mold;
Pressurizing means for urging the pressurizing portion to pressurize with the pair of heating plates;
A flat belt fusion press apparatus characterized in that irregularities are formed on the upper surface of the rubber sheet.
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