JP2018031446A - Resin-made belt and manufacturing method of resin-made belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin-made belt in which a core wire is not exposed from a resin-made belt main body part, and which has no risk of the fatigue damage of the core wire caused by a local bend, and a manufacturing method of the resin-made belt.SOLUTION: A resin-made belt comprises a belt main body part 2, a core wire 4 is embedded into the belt main body part 2, the resin-made belt contacts with the core wire 4 over an entire length of the belt main body part 2 at a traveling side face, and a support sheet material 3 is arranged between the core wire 4 and a traveling face. In a manufacturing method of the resin-made belt, the support sheet 3 composed of a resin material is arranged on a drag, the core wire 4 is arranged along the support sheet 3 while contacting with an upper face of the support sheet 3, the core wire 4 is embedded by the resin material by using the drag and a cope, and the belt main body part in which the support sheet material 3 is arranged between the core wire 4 and the traveling face is formed, thus manufacturing the resin-made belt.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a resin belt and a resin belt manufacturing method, and more particularly, a core wire is not exposed from a resin belt main body, and there is no fear of fatigue damage of the core wire due to local bending. The present invention relates to a resin belt and a method for manufacturing a resin belt.

  Industrial plastic belts used for power transmission and transportation are a belt body made of a soft resin material such as urethane rubber, and a core wire embedded in the belt body along the longitudinal direction of the belt body. (Patent Document 1). As the core wire, a stranded wire obtained by twisting fine wires made of a metal material such as steel or stainless steel, or a stranded wire obtained by twisting fiber materials such as glass fiber, aramid fiber, or carbon fiber is used.

  In the manufacture of such a resin belt, first, as shown in FIG. 9, the resin belt was supplied from a core wire supply device 103 across a pair of roller-shaped lower molds 101, 102 arranged at intervals. The core wire 104 is spirally wound. At this time, the core wire 104 is positioned in the height direction (the direction of contact with and away from the lower molds 101 and 102) by the minute protrusions provided on the lower molds 101 and 102.

  Next, as shown in FIG. 10, a gap formed between the steel belt 106 serving as an upper mold spanned by a plurality of rotating rollers 105, 105, 105 and one lower mold 101. The lower molds 101 and 102 are rotated while injecting the resin material from the nozzle 107. The steel belt 106 follows the rotation of one of the lower molds 101 and is fed across the rotating rollers 105, 105, and 105. By such injection of the resin material and rotation of the lower molds 101 and 102, the belt main body portion 108 in which the core wire 104 is embedded along the longitudinal direction is molded.

JP 2012-215248 A

  As shown in FIG. 11, the resin belt as described above has a nose groove 109 corresponding to the protrusions provided on the lower molds 101 and 102 for positioning the core wire 104 in the height direction. It is formed (Patent Document 1). The core wire 104 is exposed at the bottom of the nose groove 109. In the case of a toothed belt, the nose groove 109 is formed in the tooth bottom surface 111.

  At the time of molding the belt main body 108, the core wire 104 and the protrusions of the lower molds 101 and 102 must be in contact with each other. This is to ensure the dimensional accuracy of PLD (Pitch Line Differential: distance between the pitch surface and the tooth bottom surface; hereinafter the same), that is, to position the center line of the core wire 104 on the pitch surface of the resin belt. is there. The resin material for molding the belt main body portion 108 does not enter the portion where the core wire 104 and the protrusions of the lower molds 101 and 102 are in contact with each other. In this way, the portion where the resin material does not enter is the bottom of the nose groove 109 and the exposed portion of the core wire 104.

  In order to prevent damage to the core wire 104, it is necessary to suppress the exposed portion of the core wire 104 to an area as small as possible. That is, since the exposed portion of the core wire 104 is formed on the running surface of the belt main body portion 108 and the surface on which the pulley comes into contact, it is necessary to prevent the core wire 104 and the pulley from coming into direct contact. . Therefore, the protrusions of the lower molds 101 and 102 for positioning the core wire 104 in the height direction need to be as small as possible.

  In such a nose groove 109, since the thickness of the belt main body portion 108 is locally thin, a sudden tension is caused by the bending of the resin belt or the deterioration of the meshing state of the resin belt and the pulley. As shown in FIG. 12, local bending may occur due to fluctuations, impact or vibration during conveyance of the resin belt, and the like. Such repeated local bending may cause fatigue damage to the core wire 104, which may lead to belt breakage.

  Accordingly, the present invention provides a resin belt and a method for manufacturing the resin belt in which the core wire is not exposed from the resin belt main body and there is no fear of fatigue damage of the core wire due to local bending. Is an issue.

  Other problems of the present invention will become apparent from the following description.

  The above problems are solved by the following inventions.

(Claim 1)
It has a belt body,
A core wire is embedded in the belt main body,
A resin belt, characterized in that the core wire is in contact with the entire length of the belt main body on the running surface side, and a support sheet material is provided between the core wire and the running surface.
(Claim 2)
The resin belt according to claim 1, wherein the belt main body has a plurality of teeth located on the running surface.
(Claim 3)
3. The resin belt according to claim 1, wherein the support sheet material is a lattice mesh sheet material.
(Claim 4)
The support sheet material has a groove portion along a longitudinal direction of the belt main body portion on a surface in contact with the core wire,
The resin belt according to any one of claims 1 to 3, wherein the core wire is positioned in the width direction of the belt main body portion by engaging with the groove portion of the support sheet material. .
(Claim 5)
5. The resin belt according to claim 1, wherein the support sheet material is made of a thermosetting urethane, a thermoplastic urethane, a polyamide, a polyester, or a polymer material obtained by combining any of these. .
(Claim 6)
The resin according to any one of claims 1 to 5, wherein the support sheet material has a thickness of 0.008 mm to 2.00 mm, and a mesh opening size of a mesh is 0.3 mm or more. Made of belt.
(Claim 7)
The core wire is made of steel, stainless steel, aramid fiber, glass fiber, carbon fiber, polyamide fiber, polyester fiber, PBO fiber, or any combination thereof. The resin belt as described.
(Claim 8)
Place the support sheet material made of resin material on the lower mold,
Placing the core along the support sheet material in contact with the upper surface of the support sheet material;
Using the lower mold and the upper mold, the core wire is embedded with a resin material, and a belt main body portion in which a support sheet material is provided between the core wire and a running surface is molded. A method for manufacturing a resin belt.
(Claim 9)
The method for manufacturing a resin belt according to claim 8, wherein the plurality of tooth portions are integrally formed with the belt main body portion so as to be positioned on the traveling surface.
(Claim 10)
The method for producing a resin belt according to claim 8 or 9, wherein a lattice-mesh sheet material is used as the support sheet material.
(Claim 11)
As the support sheet material, a material having a groove portion along the longitudinal direction of the belt main body portion on the surface in contact with the core wire,
The resin belt according to any one of claims 8 to 10, wherein the belt body is positioned in the width direction by engaging the core wire with the groove portion of the support sheet material. Method.
(Claim 12)
The said support sheet material uses what consists of polymer materials which combined thermosetting urethane, thermoplastic urethane, polyamide, polyester, or these either, The any one of Claims 8-11 characterized by the above-mentioned. Manufacturing method of resin belt.
(Claim 13)
The support sheet material having a thickness of 0.008 mm to 2.00 mm and a mesh opening size of 0.3 mm or more is used. The manufacturing method of the resin-made belt of description.
(Claim 14)
The core wire is made of steel, stainless steel, aramid fiber, glass fiber, carbon fiber, polyamide fiber, polyester fiber, PBO fiber, or any combination thereof. The manufacturing method of the resin-made belt in any one.

  According to the present invention, it is possible to provide a resin belt and a method for manufacturing the resin belt in which the core wire is not exposed from the resin belt main body and there is no fear of fatigue damage of the core wire due to local bending. Can do.

The perspective view which cuts and shows the resin-made belt of the 1st Embodiment of this invention partially cut (A) is a cross-sectional view illustrating the configuration of the resin belt according to the first embodiment of the present invention, (b) is a vertical cross-sectional view of the same, and (c) is a plan view of the support sheet material of the first embodiment. Figure Plan view showing a modification of FIG. The figure explaining the manufacturing method of the resin-made belts of 1st Embodiment. The figure explaining the manufacturing method of the resin-made belts of 1st Embodiment. The side view explaining the state by which the resin belt of 1st Embodiment of this invention was curved (A) is an enlarged sectional view and an enlarged plan view showing a support sheet material of a second embodiment of the present invention, (b) is an enlarged sectional view and an enlarged plan view showing a modification of (a). (A) is a cross-sectional view illustrating the configuration of a resin belt according to a third embodiment of the present invention, and (b) is a vertical cross-sectional view of the same. The figure explaining the manufacturing method of the conventional resin belt The figure explaining the manufacturing method of the conventional resin belt (A) is a cross-sectional view illustrating the configuration of a conventional resin belt, and (b) is a vertical cross-sectional view of the same. Side view for explaining a state in which a conventional resin belt is bent

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a perspective view showing a resin belt according to a first embodiment of the present invention with a part cut away.

  As shown in FIG. 1, the resin belt 1 of the present embodiment is configured as a toothed endless belt, and includes an annular belt body 2 made of a soft resin material such as urethane rubber. The inner peripheral surface of the belt main body 2 is a running surface 2a in contact with the pulley. On the running surface 2a, a plurality of teeth 5 are integrally formed with the belt body 2 at regular intervals. A tooth bottom surface 6 is formed between two adjacent tooth portions 5 and 5.

  FIG. 2A is a transverse sectional view for explaining the configuration of the resin belt according to the first embodiment of the present invention, FIG. 2B is a longitudinal sectional view of the same, and FIG. It is a top view of a support sheet material.

  As shown in FIGS. 1 and 2A and 2B, the belt main body 2 has a support sheet material 3 and a core wire 4 along the longitudinal direction (the direction of arrow R in FIGS. 1 and 2). Is provided. The belt main body 2 is integrated from the outer peripheral surface to the plurality of tooth portions 5 of the running surface 2 a through the core wire 4 and the support sheet material 3.

  The core wire 4 is disposed with its center line positioned on the pitch surface P of the resin belt 1. That is, in the resin belt 1, the dimensional accuracy of the PLD is ensured. The pitch surface P is a surface that does not expand and contract in the longitudinal section when the resin belt 1 is bent. In order to maintain the durability of the resin belt 1, it is necessary to dispose the core wire 4 on the pitch surface P. The core wires 4 are arranged in parallel in a uniform manner over almost the entire width of the belt main body 2 with the center line positioned on the pitch plane P.

  As the core 4, a thin wire made of a metal material such as steel or stainless steel, or a thin wire made of a fiber material such as aramid fiber, glass fiber, carbon fiber, polyamide fiber, polyester fiber, or PBO fiber can be used.

  Moreover, the core wire 4 can also use the strand wire etc. which twisted together the material which combined either the said fine wire of a metal material, or the fine wire of a fiber material.

  The support sheet material 3 is located between the core wire 4 and the tooth bottom surface 6 (traveling surface 2a), and is disposed along the tooth bottom surface 6 (traveling surface 2a). The support sheet material 3 is disposed over substantially the entire width of the belt main body 2.

  As shown in FIG. 2C, the support sheet material 3 is a lattice-mesh sheet material. The support sheet material 3 is arranged such that the lattice direction of the lattice mesh (the direction of the crosspieces) is parallel to and perpendicular to the longitudinal direction of the belt body 2.

  The support sheet material 3 is formed of a thermosetting urethane, a thermoplastic urethane, a polyamide, a polyester, or a polymer material obtained by combining any of these.

  As shown in FIGS. 2A and 2B, the support sheet material 3 is disposed in contact with the core wire 4. The reason why the support sheet 3 is in contact with the core wire 4 is to support the height position of the core wire 4 (position in the thickness direction of the belt main body 2) in the manufacturing process of the resin belt 1 as will be described later. This is because it is defined by a molding die through the sheet material 3 and maintains the dimensional accuracy of the PLD.

  The thickness of the support sheet material 3 can be appropriately determined according to the specifications of the resin belt 1. The thickness of the support sheet material 3 is preferably about 0.008 mm to 2.00 mm, for example, from the viewpoint of durability and bendability. However, since the support sheet material 3 is disposed along the tooth bottom portion 6 and is in contact with the core wire 4, the total thickness of the support sheet material 3 and the radius of the core wire 4 needs to match the PLD dimension. is there.

  The opening size of the lattice forming the mesh of the support sheet material 3 is preferably 0.3 mm or more. This is to sufficiently pass the resin material for molding the belt main body 2.

  FIG. 3 is a plan view showing a modification of FIG.

  As shown in FIG. 3, the support sheet material 3 has a lattice mesh lattice direction (the direction of the crosspieces) inclined by 45 ° with respect to the longitudinal direction (circumferential direction) of the belt main body 2 indicated by the arrow R in FIG. You may arrange | position so that it may become a direction.

  4 and 5 are diagrams for explaining a method of manufacturing the resin belt shown in the first embodiment.

  In order to manufacture the resin belt 1, as shown in FIG. 4, a pair of roller-shaped lower molds 101 and 102 arranged at intervals is used. Molded portions corresponding to the shape of the running surface 2 a of the resin belt 1 to be manufactured are recessed in the outer peripheral surfaces of the lower molds 101 and 102.

  In this embodiment, a plurality of groove-shaped molding portions (not shown) for forming the tooth portions 5 are recessed in the outer peripheral surfaces of the lower molds 101 and 102. The lower molds 101 and 102 produce a toothed endless belt in which a plurality of tooth portions 5 project from the inner peripheral surface of the annular belt main body portion 2. Each tooth portion 5 is configured in a substantially trapezoidal columnar shape, and it is preferable that the surface with which the teeth of the pulley come into contact is an involute curved surface.

  To manufacture the resin belt 1, first, as shown in FIG. 4, the support sheet material 3 is wound around a pair of lower molds 101 and 102. The support sheet material 3 is wound in contact with the outermost peripheral surface (surface on which the tooth bottom surface 6 is molded) of the lower molds 101 and 102, and is positioned in the height direction (direction of contact with and away from the lower molds 101 and 102). Is done.

  Next, the core wire 4 supplied from the core wire supply device 103 is spirally wound a plurality of times from above the support sheet material 3 across the pair of lower dies 101 and 102. At this time, the core wire 4 is in contact with the surface of the support sheet material 3, and the height position is defined by the lower molds 101 and 102 via the support sheet material 3. By defining the height position of the core wire 4 by the lower molds 101 and 102, the dimensional accuracy of the PLD is ensured. That is, the center line of the core wire 4 is located on the pitch surface P of the resin belt 1 to be manufactured.

  In the lower molds 101 and 102 in this embodiment, unlike the prior art, there is no protrusion for making the height position of the core wire 4 coincide with the pitch surface P of the resin belt 1. Since the support sheet 3 is interposed between the lower molds 101 and 102 and the core wire 4, the thickness of the support sheet 3 is made equal to the height of the protrusions in the prior art. The height position can be matched with the pitch surface P of the resin belt 1.

  Next, as shown in FIG. 5, a gap formed between the steel belt 106 serving as an upper mold spanned by a plurality of rotating rollers 105, 105, 105 and one lower mold 101. The lower molds 101 and 102 are rotated while injecting the resin material from the nozzle 107. The steel belt 106 follows the rotation of one of the lower molds 101 and is fed across the rotating rollers 105, 105, and 105. At this time, the resin material injected from the nozzle 107 is also injected into the openings of the lattice of the support sheet 3 through the cores 4. Further, this resin material passes through the mesh openings of the support sheet material 3 and is also injected into a molding portion for forming the tooth portions 5 on the outer peripheral surfaces of the lower molds 101 and 102. By injecting the resin material and rotating the lower molds 101 and 102, the core wire 4 and the support sheet material 3 are covered with the resin material, and the core wire 4 and the support sheet material 3 are embedded and integrated along the longitudinal direction. The belt main body 2 is molded.

  As described above, since the lower molds 101 and 102 do not have protrusions, the molded belt main body 2 has a nose as shown in FIGS. 2A and 2B, unlike the prior art. No groove is formed. In the belt main body 2, a sheet material exposed portion 7 is formed corresponding to a contact portion between the lower molds 101 and 102 and the support sheet material 3 for determining the height position of the support sheet material 3. In the sheet material exposed portion 7, the surface of the support sheet material 3 is exposed outward. The sheet material exposed portion 7 is formed on substantially the entire surface of the tooth bottom surface 6.

  That is, the support sheet material 3 and the lower molds 101 and 102 must be in contact with each other for positioning the height of the support sheet material 3, and the resin material for molding the belt main body 2 at this contact portion. Does not enter. Therefore, a sheet material exposed portion 7 in which the surface of the support sheet material 3 is exposed to the outside is formed in this contact portion. Since the core wire 4 is embedded on the inner side of the belt main body 2 relative to the support sheet material 3, it is not exposed to the outside.

  In this way, the core 4 and the support sheet material 3 are embedded along the longitudinal direction of the belt main body 2, and the resin belt 1 having no nose groove can be manufactured. In the resin belt 1, the state in which the support sheet material 3 is in contact with the core wire 4 is maintained, and the dimensional accuracy of the PLD is maintained in this state.

  FIG. 6 is a side view illustrating a state where the resin belt according to the first embodiment of the present invention is curved.

  In the resin belt 1, unlike the prior art, there is no local thin portion such as a nose groove. Therefore, as shown in FIG. 6, the resin belt 1 is bent, sudden tension fluctuation due to deterioration of the meshing state of the resin belt 1 and the pulley, impact and vibration during the transportation of the resin belt 1, etc. As a result, local bending does not occur and there is no fear of fatigue damage of the core wire 4.

  Further, as shown in FIGS. 2 (c) and 3, the support sheet material 3 has a lattice-like opening, so that when the impregnated resin is cured by impregnating the resin in the lattice-like gaps, a plate state Thus, the resin in the plate state can play a role as a reinforcing function of the core wire as compared with the case of the belt only of the core wire.

[Second Embodiment]
FIG. 7A is an enlarged sectional view and an enlarged plan view of the support sheet material of the second embodiment of the present invention, and FIG. 7B is an enlarged sectional view showing a modification of FIG. 7A. It is an enlarged plan view.

  Since the resin belt of the second embodiment has the same configuration and manufacturing method as those of the first embodiment except for the support sheet material 3, description thereof will be omitted.

  In the resin belt according to the second embodiment, as shown in FIG. 7A, the surface of the support sheet material 3 on the side of the core wire 4 (here, the outer peripheral surface) is indicated by an arrow R in FIG. A groove portion 8 is provided along the longitudinal direction (circumferential direction).

  The groove 8 is formed across the mesh openings 3 a and the crosspieces 3 b of the lattice of the support sheet material 3.

  Moreover, you may form the groove part 8 along the crosspiece 3b on each crosspiece 3b of the grating | lattice of the support sheet material 3, as shown in FIG.7 (b). Also in this case, the groove part 8 is provided along the longitudinal direction (circumferential direction) shown by the arrow R in FIG.

  The core 4 is engaged with the groove 8 in the manufacturing process of the resin belt. The core 4 is positioned not only in the height direction (thickness direction of the support sheet material 3) but also in the width direction of the belt main body 2 by engaging with the groove 8. The core wire 4 engaged with the groove portion 8 is not displaced in the width direction due to the pressure of the resin material or the flow of the resin material even when the resin material forming the belt main body 2 is injected.

  That is, in this embodiment, not only in the height direction, but also in the width direction of the belt main body 2, the position of the core wire 4 can be accurately maintained at a desired position, and is made of a resin having desired characteristics. A belt can be constructed.

[Third Embodiment]
FIG. 8A is a transverse sectional view for explaining the configuration of the resin belt according to the third embodiment of the present invention, and FIG. 8B is a longitudinal sectional view of the same.

  Since the resin belt 1 of the third embodiment is the same as the first and second embodiments in the configuration and the manufacturing method other than the V guide 9, the description thereof is omitted.

  As shown in FIGS. 8A and 8B, the resin belt 1 of the third embodiment is configured by providing a V guide 9. The V guides 9 are protrusions arranged in a row so as to protrude from the tooth part 5 on the inner peripheral side of the belt main body part 2. These V guides 9 protrude from the central portion of each tooth portion 5 in correspondence with each tooth portion 5. Each V guide 9 is formed in a substantially square frustum shape.

  Each V guide 9 can prevent a transition in the width direction of the resin belt 1 on the pulley by meshing with a V groove formed by longitudinally cutting the teeth of the pulley.

  In the third embodiment, any one of the support sheet materials 3 in the first and second embodiments may be used as the support sheet material 3.

  In each of the above-described embodiments, the toothed belt having the tooth portion 5 has been described. However, the resin belt according to the present invention is not limited to this, and is configured as a flat belt or a V belt without the tooth portion 5. Also good. The resin belt manufacturing method described above manufactures a toothed belt, but it can also be manufactured by the same manufacturing process when a flat belt or a V-belt is manufactured. In the case of a flat belt, the sheet material exposed portion 7 is formed over substantially the entire running surface 2 a of the belt main body portion 2.

  Moreover, although each embodiment mentioned above demonstrated the endless belt which does not have an edge part, the resin-made belts which concern on this invention are not limited to this, You may comprise as an endless belt which has an edge part. The resin belt manufacturing method described above manufactures an endless belt, but the endless belt can also be manufactured by the same manufacturing process.

DESCRIPTION OF SYMBOLS 1: Resin belt 2: Belt main-body part 2a: Running surface 3: Support sheet material 3a: Opening 3b: Crosspiece part 4: Core wire 5: Tooth part 6: Tooth base 7: Sheet material exposure part 8: Groove part 9: V guide 101, 102: Lower mold 103: Core wire supply device 105: Rotating roller 106: Steel belt 107: Nozzle

Claims (14)

It has a belt body,
A core wire is embedded in the belt main body,
A resin belt, characterized in that the core wire is in contact with the entire length of the belt main body on the running surface side, and a support sheet material is provided between the core wire and the running surface.   The resin belt according to claim 1, wherein the belt main body has a plurality of teeth located on the running surface.   3. The resin belt according to claim 1, wherein the support sheet material is a lattice mesh sheet material. The support sheet material has a groove portion along a longitudinal direction of the belt main body portion on a surface in contact with the core wire,
The resin belt according to any one of claims 1 to 3, wherein the core wire is positioned in the width direction of the belt main body portion by engaging with the groove portion of the support sheet material. .   5. The resin belt according to claim 1, wherein the support sheet material is made of a thermosetting urethane, a thermoplastic urethane, a polyamide, a polyester, or a polymer material obtained by combining any of these. .   The resin according to any one of claims 1 to 5, wherein the support sheet material has a thickness of 0.008 mm to 2.00 mm, and a mesh opening size of a mesh is 0.3 mm or more. Made of belt.   The core wire is made of steel, stainless steel, aramid fiber, glass fiber, carbon fiber, polyamide fiber, polyester fiber, PBO fiber, or any combination thereof. The resin belt as described. Place the support sheet material made of resin material on the lower mold,
Placing the core along the support sheet material in contact with the upper surface of the support sheet material;
Using the lower mold and the upper mold, the core wire is embedded with a resin material, and a belt main body portion in which a support sheet material is provided between the core wire and a running surface is molded. A method for manufacturing a resin belt.   The method for manufacturing a resin belt according to claim 8, wherein the plurality of tooth portions are integrally formed with the belt main body portion so as to be positioned on the traveling surface.   The method for producing a resin belt according to claim 8 or 9, wherein a lattice-mesh sheet material is used as the support sheet material. As the support sheet material, a material having a groove portion along the longitudinal direction of the belt main body portion on the surface in contact with the core wire,
The resin belt according to any one of claims 8 to 10, wherein the belt body is positioned in the width direction by engaging the core wire with the groove portion of the support sheet material. Method.   The said support sheet material uses what consists of polymer materials which combined thermosetting urethane, thermoplastic urethane, polyamide, polyester, or these either, The any one of Claims 8-11 characterized by the above-mentioned. Manufacturing method of resin belt.   The support sheet material having a thickness of 0.008 mm to 2.00 mm and a mesh opening size of 0.3 mm or more is used. The manufacturing method of the resin-made belt of description.   The core wire is made of steel, stainless steel, aramid fiber, glass fiber, carbon fiber, polyamide fiber, polyester fiber, PBO fiber, or any combination thereof. The manufacturing method of the resin-made belt in any one.

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