JP6824122B2 - Inversion device - Google Patents

Description

The present invention relates to a reversing device for reversing an annular object such as a transmission belt.

Conventionally, in the production of a transmission belt including a V-belt, an endless annular product such as an intermediate molded product in the belt manufacturing process or a final molded product obtained by molding / vulcanization can be obtained. In the production of the transmission belt including the V-belt, each process (construction method) selected as appropriate is combined and proceeded. In this series of steps, a step performed by so-called normal molding (molding in a state where a plurality of rubber sleeves are arranged so that the outer peripheral side of the annular material becomes an stretch rubber layer and the inner peripheral side becomes a compressed rubber layer), so-called There may be a mixture of steps performed by reverse molding (molding in a state where a plurality of rubber sleeves are arranged so that the inner peripheral side of the annular material is the stretched rubber layer and the outer peripheral side is the compressed rubber layer). In this case, when shifting from the normal molding process to the reverse molding process (or vice versa), it is necessary to reverse the inner peripheral side and the outer peripheral side of the annular material, and this work is performed. For example, it is performed manually by an operator. In this regard, Patent Document 1 discloses a V-belt reversing device that performs this reversing operation.

The reversing device described in Patent Document 1 has two belt hooks, two hook-shaped bodies, and two swivel arms. The two belt hooks are arranged on the inner peripheral side of the belt. One of the two belt hooks is configured to move upwards and the other is configured to move downwards. When these two belt hooks move in opposite directions along the vertical direction, the belt is stretched. The two hook-shaped bodies are attached to the tips of the two swivel arms, and are formed so as to be hooked on the side surface and the inner peripheral surface of the belt. Then, the two hook-shaped bodies invert the belt by rotating around the rotation axis of the swivel arm by the two swivel arms.

Japanese Unexamined Patent Publication No. 7-2053030

However, in the above configuration, the belt hook for applying tension to the belt and the hook-shaped body for reversing the belt are provided as separate members, and the configuration of the reversing device is complicated.

In view of the above background, it is an object of the present invention to provide a reversing device having a simpler structure and capable of further improving the work efficiency of the reversing operation of an annular belt.

(1) In order to solve the above problems, the reversing device according to a certain aspect of the present invention has a first engaging portion and a second engaging portion for holding the endless belt, and these first engaging portions. And the reversing operation unit configured to perform the reversing operation for exchanging the position of the inner peripheral portion and the position of the outer peripheral portion of the belt by the operation of the second engaging portion, the tensioning operation of the belt, and the release of the tensioning operation. It is provided with a belt tensioning operation portion for relatively operating the first engaging portion and the second engaging portion so as to perform the above.

The above-mentioned "belt" refers to an annular material and includes a flexible endless member. As an example of this belt, an unvulcanized sleeve having a configuration in which a core wire is arranged between a cylindrical unvulcanized rubber sheet on the inner peripheral side and a cylindrical unvulcanized rubber sheet on the outer peripheral side is provided for each predetermined width. Examples thereof include unvulcanized belts obtained by cutting one by one.

According to the above configuration, the belt reversing operation and the belt tensioning operation are both performed by the first engaging portion and the second engaging portion. As described above, since the member for the belt reversing operation and the member for the belt tensioning operation are common, the configuration of the reversing device can be further simplified. Further, the belt reversing operation can be completed in a shorter time by the belt reversing operation using the reversing device, as compared with the case where the belt reversing operation is performed entirely by hand. As a result, the work efficiency of the belt reversing operation can be further improved.

(2) Preferably, the belt tensioning operation portion is configured to be displaced in a direction in which the first engaging portion and the second engaging portion are relatively close to each other and relatively away from each other.

According to this configuration, the mode of relative movement of the first engaging portion and the second engaging portion for the belt tensioning operation can be simplified. As a result, the configuration of the belt tensioning operation portion can be simplified.

(3) Preferably, the reversing operation unit has a first unit including the first engaging portion and a second unit including the second engaging portion, and each of the units is a swivel actuator. And an arm that is rotatably supported by the swivel actuator and supports the first engaging portion and the second engaging portion corresponding to the swivel actuator, and the swirling operation of each of the arms causes the first engaging portion. And the belt held by the second engaging portion is configured to be inverted.

According to this configuration, turning actuators are provided in each of the first unit and the second unit. As a result, the reversing operation of the belt can be more reliably realized by the cooperation of the first engaging portion and the second engaging portion. Further, for example, by shifting the timing at which the first engaging portion reverses the belt and the timing at which the second engaging portion reverses the belt, the belt is unintended and unnecessary when the belt reversal is completed. It is possible to prevent the twist from remaining.

(4) Preferably, the belt tensioning operation unit is configured to perform the belt tensioning operation by operating either the first unit or the second unit.

According to this configuration, the belt tensioning operation unit can realize the belt tensioning operation and the belt tensioning release operation by operating only one of the first unit and the second unit. As a result, the configuration of the reversing device can be further simplified through the simplification of the configuration of the belt tensioning operation unit.

(5) Preferably, the reversing device is provided between the first engaging portion and the second engaging portion when the first engaging portion and the second engaging portion hold the belt. A tension relief mechanism is provided for displace one of the first engaging portion and the second engaging portion to the other side by a predetermined amount when the load acting on the force exceeds a predetermined value.

According to this configuration, the belt held by the first engaging portion and the second engaging portion is momentarily large when tension is applied by the operation of the first engaging portion and the second engaging portion. When tension is generated, it is suppressed that the tension is excessively strong between the first engaging portion and the second engaging portion. As a result, it is possible to more reliably suppress defects caused by an excessive load acting on the belt (for example, the core wire of the unvulcanized belt is displaced with respect to the rubber layer of the belt).

(6) Preferably, the swivel actuator includes an output unit to which the arm is attached, and the tension relief mechanism is provided between the output unit and the arm so that the arm is arranged at a predetermined position. It includes an elastic member for applying elastic force.

According to this configuration, for example, when the belt tensioning operation is released, the rotational position of the arm to which the elastic member is attached can be returned to the position before the tension release mechanism operates. As described above, with a simple configuration in which the elastic member is provided, it is possible to realize an automatic return operation of the arm provided with the tension relief mechanism and the engaging portion supported by the arm.

(7) Preferably, the swivel actuator swivels the arm and the corresponding engaging portion so that the load acting between the first engaging portion and the second engaging portion exceeds a predetermined value. It is configured to let you.

According to this configuration, for example, when reversing an unvulcanized belt having a structure in which a core wire is sandwiched between an unvulcanized rubber sheet as a compressed rubber layer and an unvulcanized rubber sheet as an stretched rubber layer. It is possible to more reliably suppress the peeling of each unvulcanized rubber sheet and the core wire. More specifically, for example, when the unvulcanized belt is held between the first engaging portion and the second engaging portion, the first engaging portion is swiveled by the swivel actuator of the first unit. Then, the unvulcanized belt is in a twisted state. Next, when the second engaging portion is swiveled by the swivel actuator of the second unit, the unvulcanized belt is untwisted and the entire unvulcanized belt is inverted. At this time, since the load acting between the first engaging portion and the second engaging portion exceeds a predetermined value, the engaging portion attached to the arm provided with the tension release mechanism is the other. Displace toward the side engaging part. As a result, the load acting between the first engaging portion and the second engaging portion can be made to exceed a predetermined value. By this operation, the unvulcanized rubber sheet and the core wire can be pressed against each other so as not to be peeled off. As a result, as described above, it is possible to prevent the unvulcanized rubber sheet and the core wire from peeling off.

(8) Preferably, each engaging portion includes a chuck configured to grip the inner peripheral surface and the outer peripheral surface of the belt.

According to this configuration, the belt can be held by the chuck by inserting the belt into the chuck. In particular, if the belt is oriented vertically (the orientation of the belt when the axial direction of the belt is approximately horizontal), the chuck can be inserted into the chuck before the chuck pinches the belt in a pressurized state. Can hold the belt. As a result, the labor of handling the belt in the reversing device can be reduced.

(9) Preferably, the reversing device further includes a chuck actuator for causing the chuck to perform an operation of gripping the belt and an operation of releasing the grip of the belt.

According to this configuration, the chuck gripping operation of the belt and the chuck gripping release operation of the belt can be performed by the chuck actuator.

According to the present invention, the work efficiency of the reversing operation of the belt, which is an annular material, can be further improved with a simpler configuration.

(A) is a perspective view showing a winding process at the time of manufacturing a transmission belt, (B) is a perspective view showing a core wire spinning process, and (C) is a perspective view showing an upper sheet pasting process. Yes, (D) is a perspective view showing a cutting process. (A) is a perspective view showing a first reversing step of reversing an unvulcanized belt, (B) is a perspective view showing a skiving step of an unvulcanized belt, and (C) is a skiving step. It is a perspective view which shows the 2nd reversal process which reverts the vulcanized belt which has passed through. It is a flowchart for demonstrating an example of the molding process of a transmission belt. It is a schematic perspective view of a reversing apparatus and an unvulcanized belt. It is a flowchart for demonstrating an example of the reversal process of an unvulcanized belt. (A) is a perspective view showing a state in which an unvulcanized belt is set (inserted), and (B) is a perspective view showing a state in which the unvulcanized belt is grasped by each chuck. It is a perspective view which shows the belt tensioning operation. (A) is a perspective view showing a state in which the belt tensioning operation is released, and (B) is a schematic cross-sectional view of a main part of FIG. 8 (A). (A) is a perspective view showing a state in which a belt reversing operation is performed by the first chuck, and (B) is a schematic cross-sectional view of a main part of FIG. 9 (A). (A) is a perspective view showing a state in which a belt reversing operation is performed by each chuck, and (B) is a schematic cross-sectional view of a main part of FIG. 10 (A). (A) is a perspective view showing a state in which a belt tensioning operation is performed after the belt reversing operation by each chuck, and (B) is a state in which the belt reversing operation is completed and the unvulcanized belt can be removed. It is a perspective view which shows. (A) is a diagram for explaining a modified example of the operation of step S108 shown in FIG. 5, and (B) is a diagram for explaining a modified example of the operation of step S109 shown in FIG.

Hereinafter, embodiments of the present invention will be described. FIG. 1A is a perspective view showing a winding process at the time of manufacturing a transmission belt. FIG. 1B is a perspective view showing a core wire spinning process. FIG. 1C is a perspective view showing an upper sheet pasting process. FIG. 1D is a perspective view showing a cutting process. FIG. 2A is a perspective view showing a first reversing step of reversing the unvulcanized belt 8. FIG. 2B is a perspective view showing a skiving process of the unvulcanized belt 8. FIG. 2C is a perspective view showing a second reversing step of reversing the unvulcanized belt 8 that has undergone the skiving step. FIG. 3 is a flowchart for explaining an example of the process of forming the transmission belt. When the explanation is given with reference to the flowchart, the drawings other than the flowchart will be described as appropriate.

With reference to FIGS. 1 (A) to 2 (C) and FIG. 3, a method for manufacturing the transmission belt will be described below. As this transmission belt, a friction transmission belt such as a V-belt, a V-ribbed belt, or a flat belt can be exemplified. There are two types of V-belts: a raw-edge type in which a rubber layer is exposed on the side surface for friction transmission, and a wrapped type in which the belt is covered with an outer cover. In the present embodiment, a case where a wrapped V-belt is manufactured as a transmission belt will be described as an example.

The wrapped V-belt has an endless belt body and an outer cover. The belt body has a structure in which a core wire is embedded between a compressed rubber layer on the inner peripheral side of the belt and an stretched rubber layer on the outer peripheral side. The compressed rubber layer and the stretched rubber layer are formed by using, for example, natural rubber (NR), styrene-butadiene rubber (SBR), or the like. The material of the core wire is, for example, polyester. The outer cover covers the circumference of the belt body over the entire length in the belt circumferential direction.

When a wrapped V-belt having the above configuration is manufactured, first, the raw rubber is rolled in order to form an unvulcanized rubber sheet to be an inner peripheral rubber layer (step S1). Next, the raw rubber formed in a strip shape by rolling is cut along the longitudinal direction of the strip at predetermined length intervals (step S2). Next, as shown in FIG. 1 (A), the cut raw material rubber is wound around the outer peripheral portion of the molding mantle 1 to form the raw material rubber as an unvulcanized rubber sheet 2, and the raw material rubber is formed by the molding mantle 1. The unvulcanized rubber sheet 2 is held in a circular shape. That is, the winding (setting) step of the unvulcanized rubber sheet 2 is performed (step S3). In the winding step, the unvulcanized rubber sheet 2 as a processing target is supported from the inner peripheral side of the unvulcanized rubber sheet 2 to hold the unvulcanized rubber sheet 2 in a circular shape. This is a step of winding the unvulcanized rubber sheet 2 around the molding mantle 1.

Next, as shown in FIG. 1 (B), a spinning step is performed in which the core wire 3 is wound around the unvulcanized rubber sheet 2 wound around the molding mantle 1 (step S4). In the spinning step, the core wire 3 wound around the bobbin 4 is unwound from the bobbin 4 as the unvulcanized rubber sheet 2 is rotated by the molding mantle 1. Then, the core wire 3 drawn out from the bobbin 4 is spirally wound around the unvulcanized rubber sheet 2.

Next, as shown in FIG. 1C, the upper sheet pasting step is performed (step S5). In the upper sheet pasting step, the unvulcanized rubber sheet 5 formed in the same manner as the unvulcanized rubber sheet 2 is wound around the outer peripheral portion of the unvulcanized rubber sheet 2 in a state where the core wire 3 is wound. As a result, as shown in FIG. 1 (D), the unvulcanized sleeve 6 having a structure in which the core wire 3 is sandwiched between the unvulcanized rubber sheets 2 and 5 is completed.

Next, a cutting step is performed (step S6). In the cutting step, the cutter 7 cuts the unvulcanized sleeve 6 at predetermined intervals along the axial direction of the unvulcanized rubber sheet 2. As a result, the unvulcanized belt 8 made of a part of the unvulcanized sleeve 6 is manufactured.

Next, as shown in FIG. 2A, a first reversing step of reversing the unvulcanized belt 8 is performed (step S7). In the first reversing step, the unvulcanized belt 8 is hung on the reversing device 10. Then, by the operation of the reversing device 10, a reversing operation is performed in which the position of the inner peripheral portion and the position of the outer peripheral portion of the unvulcanized belt 8 are exchanged. As a result, the unvulcanized belt 8 is in a state where the unvulcanized rubber sheet 2 is arranged on the outer peripheral side of the unvulcanized rubber sheet 5.

Next, as shown in FIG. 2 (B), a skive step is performed (step S8). In the skiving step, both side surfaces of the unvulcanized belt 8 are scraped using a cutter 9 so that the inverted unvulcanized belt 8 has a V-shaped cross section. Next, a second reversing step of reversing the unvulcanized belt 8 is performed (step S9). In the second reversing step, the unvulcanized belt 8 is hung on the reversing device 10 again. Then, by the operation of the reversing device 10, a reversing operation is performed in which the position of the inner peripheral portion and the position of the outer peripheral portion of the unvulcanized belt 8 are exchanged. As a result, the unvulcanized belt 8 is in a state in which the unvulcanized rubber sheet 5 is arranged on the outer peripheral side of the unvulcanized rubber sheet 2 in the same manner as when it is wound around the mantle 1.

Next, a cover winding step is performed (step S10). In the cover winding process, the outer cover is wound around the unvulcanized belt 8 that has undergone the skive process. Next, the unvulcanized belt 8 on which the outer cover is wound is subjected to the vulcanization treatment while being held by a predetermined mold (step S11). As a result, the rubber portion of the unvulcanized belt 8 is vulcanized, and as a result, the transmission belt is completed.

Next, the configuration of the reversing device 10 will be described more specifically. FIG. 4 is a schematic perspective view of the reversing device 10 and the unvulcanized belt 8. With reference to FIG. 4, the reversing device 10 includes a support column 11, a reversing operation unit 12, a belt tensioning operation unit 13, and a control device 14 for controlling the reversing operation unit 12 and the belt tensioning operation unit 13. Have.

The support column 11 is provided as a base member that supports the reversing operation portion 12 and the belt tensioning operation portion 13, and extends upward from the ground.

The reversing operation unit 12 is different from the first unit 20 for grasping and operating a part of the unvulcanized belt 8 in the circumferential direction of the unvulcanized belt 8 and the above-mentioned part of the unvulcanized belt 8. It has a second unit 30 for grasping and operating a part thereof.

The first unit 20 is installed above the support column 11, and the second unit 30 is installed below the support column 11. In this embodiment, the first unit 20 and the second unit 30 are arranged one above the other as an example, but this may not be the case. For example, the columns 11 may be arranged horizontally, and the units 20 and 30 may be arranged horizontally.

The first unit 20 has a first turning actuator 201, a first arm 202, a first chuck actuator 203, a first engaging portion 204, and a tension release mechanism 205. Further, the second unit 30 has a second turning actuator 301, a second arm 302, a second chuck actuator 303, and a second engaging portion 304.

As described above, the reversing operation unit 12 has the first engaging portion 204 and the second engaging portion 304 for holding the endless unvulcanized belt 8, and the first engaging portion 204 and the second engaging portion 204. It is configured to perform a reversing operation in which the position of the inner peripheral portion and the position of the outer peripheral portion of the unvulcanized belt 8 are exchanged by the operation of the joint portion 304.

Further, the units 20 and 30 are rotatably supported by the swivel actuators 201 and 301 and the first arm supporting the corresponding first engaging portion 204 and the second engaging portion 304. It includes 202 and a second arm 302. Then, the unvulcanized belt 8 held by the first engaging portion 204 and the second engaging portion 304 is configured to be inverted by the turning operation of each of the arms 202 and 302.

The turning actuators 201 and 301 are, for example, electric actuators, and are configured to operate using the output of the electric motor. The swivel actuators 201 and 301 are arranged adjacent to the support column 11. The first turning actuator 201 is directly supported by the support column 11. The second turning actuator 301 is supported by the support column 11 via the belt tensioning operation unit 13.

The swivel actuators 201 and 301 have bases 209 and 309 and output units 210 and 310.

Each base 209,309 includes an electric motor and a case accommodating the electric motor. The base 209 is fixed to the support column 11 by using a fixing member such as a screw member, and the base 309 is attached to the belt tensioning operation portion 13. Corresponding output units 210 and 310 project from the bases 209 and 309, respectively. In the present embodiment, the output units 210 and 310 extend in parallel with each other and are configured to be rotatable around a central axis parallel to each other. In the present embodiment, the output units 210 and 310 extend horizontally, and the directions extending from the columns 11 are set to be the same. The first arm 202 is fixed to the output unit 210, and the second arm 302 is fixed to the output unit 310.

The first arm 202 is provided as an arm member that connects the first engaging portion 204 and the output portion 210 in order to rotate the first engaging portion 204 around the output portion 210. Similarly, the second arm 302 is provided as an arm member that connects the second engaging portion 304 and the output portion 310 in order to rotate the second engaging portion 304 around the output portion 310. The arms 202 and 302 are arranged parallel to each other and horizontally in a standby state in which the reversing device 10 has not received the unvulcanized belt 8 and is ready to receive the unvulcanized belt 8. Has been done.

In this embodiment, the arms 202 and 302 are formed in an L shape. The base ends of the arms 202 and 302 are fixed to the corresponding output units 210 and 310, and extend horizontally and parallel to each other in the standby state. The middle portion of each of the arms 202 and 302 is bent by 90 °, and the tip portion extends at an angle of 90 ° with respect to the base end portion. In the standby state, the arms 202 and 302 face each other up and down. The first chuck actuator 203 is attached to the tip of the first arm 202, and the second chuck actuator 303 is attached to the tip of the second arm 302.

The chuck actuators 203 and 303 are fluid pressure actuators that operate using a fluid pressure such as air pressure, for example.

The first chuck actuator 203 holds the first engaging portion 204, and can rotate around the output portion 210 together with the first engaging portion 204 and the first arm 202. In this embodiment, the first engaging portion 204 has a chuck 211 including a pair of hands 212, 212. By setting the width of each hand 212, 212 (the length of the unvulcanized belt 8 in the circumferential direction) to, for example, 50 mm or more, the unvulcanized belt 8 can be more reliably gripped by the chuck 211. The unvulcanized belt 8 is held by grasping (sandwiching) the inner peripheral surface and the outer peripheral surface of the unvulcanized belt 8 with the hands 212 and 212. Each hand 212, 212 is formed in the shape of a rectangular plate in this embodiment. The actuator 203 for the first chuck holds the pair of hands 212, 212 and performs an operation of changing the interval between the pair of hands 212, 212, so that the unvulcanized belt 8 by the pair of hands 212, 212 8 is used. It is configured to perform the gripping operation of the above and the release of the gripping operation. In the present embodiment, by moving the unvulcanized belt 8 along the horizontal direction with respect to the pair of hands 211 and 211, the unvulcanized belt 8 can be inserted between the pair of hands 212 and 212 or the hands 212. , 212 is configured to be taken out.

The second chuck actuator 303 holds the second engaging portion 304, and can rotate around the output portion 310 together with the second engaging portion 304 and the second arm 302. The second engaging portion 304, in this embodiment, has a chuck 311 including a pair of hands 312 and 312. By setting the width of each hand 312, 312 (the length of the unvulcanized belt 8 in the circumferential direction) to, for example, 50 mm or more, the unvulcanized belt 8 can be more reliably gripped by the chuck 311. The unvulcanized belt 8 is held by grasping (sandwiching) the inner peripheral surface and the outer peripheral surface of the unvulcanized belt 8 with the hands 312 and 312. Each hand 312, 312 is formed in the shape of a rectangular plate in this embodiment. The second chuck actuator 303 holds the pair of hands 312 and 312 and performs an operation of changing the interval between the pair of hands 312 and 312, so that the unvulcanized belt 8 by the pair of hands 312 and 312 It is configured to perform the gripping operation of the above and the release of the gripping operation. In the present embodiment, by moving the unvulcanized belt 8 along the horizontal direction with respect to the pair of hands 312 and 312, the unvulcanized belt 8 can be inserted between the pair of hands 312 and 312 or the hands 312. , 312 is configured to be taken out.

In the present embodiment, the first engaging portion 204 and the second engaging portion 304 grip the unvulcanized belt 8 at positions separated by 180 ° in the circumferential direction of the unvulcanized belt 8.

The tension release mechanism 205 acts between the first engaging portion 204 and the second engaging portion 304 when the first engaging portion 204 and the second engaging portion 304 hold the unvulcanized belt 8. The purpose is to displace either one of the first engaging portion 204 and the second engaging portion 304 to the other side by a predetermined amount when the load to be applied exceeds a predetermined value. As described above, the tension release mechanism 205 is provided in the first unit 20 in the present embodiment.

The tension release mechanism 205 includes an elastic member 213 and a stopper 214.

The elastic member 213 is provided to apply an elastic force between the output unit 210 and the first arm 202 so that the first arm 202 of the first unit 20 is arranged at a predetermined position with respect to the output unit 210. ing. This predetermined position is the position of the first arm 202 when the first arm 202 in the standby state is horizontally arranged. The elastic member 213 is, for example, a spring member such as a coil spring. One end of the elastic member 213 is fixed to the output unit 210. The other end of the elastic member 213 is fixed to the first arm 202. When the first arm 202 is in a rotational position other than the predetermined position with respect to the output unit 210, the elastic member 213 is compressed or expanded to cause the first arm 202 to return to the predetermined position. give.

The stopper 214 is provided to regulate that the first arm 202 turns by a predetermined value or more when the first arm 202 turns by receiving torque with respect to the output unit 210 of the first turning actuator 201. As long as it is a member capable of performing this regulation, the configuration is not limited. In this embodiment, the stopper 214 is arranged in the base 209 of the first turning actuator 201. The stopper 214 is configured to regulate the rotation of the first arm 202 when the first arm 202 rotates by a predetermined value in the clockwise direction with respect to the output unit 210 of the first turning actuator 201. Similarly, the stopper 214 is configured to regulate the rotation of the first arm 202 when the first arm 202 rotates a predetermined value in the counterclockwise direction with respect to the output unit 210 of the first turning actuator 201. ing.

The belt tensioning operation portion 13 is provided to relatively move the first engaging portion 204 and the second engaging portion 304 so as to perform the tensioning operation of the unvulcanized belt 8 and the releasing of the tensioning operation. The belt tensioning operation unit 13 is configured to perform the tensioning operation of the unvulcanized belt 8 by operating either the first unit 20 or the second unit 30. In the present embodiment, the belt tensioning operation unit 13 operates the second unit 30 without operating the first unit 20.

The belt tensioning operation unit 13 is, for example, a fluid pressure actuator that operates using a fluid pressure such as air pressure, and is a linear actuator that linearly displaces the first unit 20.

The belt tensioning operation portion 13 has a fixing portion 15 and a movable portion 16.

The fixed portion 15 is fixed to the support column 11 and has a rail for the movable portion 16 to slide. The direction in which the fixed portion 15 extends (in the present embodiment, the vertical direction) is the moving direction of the movable portion 16. The movable portion 16 is configured to slide on the rail of the fixed portion 15. The base 309 of the second turning actuator 301 of the second unit 30 is fixed to the movable portion 16. With this configuration, the movable portion 16 is linearly displaced with respect to the fixed portion 15, so that the second engaging portion 304 is also linearly displaced in conjunction with it. As a result, the belt tensioning operation portion 13 displaces the first engaging portion 204 and the second engaging portion 304 in the relatively approaching direction and the relatively distant direction.

The control device 14 is formed by using any one or more of a CPU, a RAM, a computer including a ROM, a PLC (Programmable Logic Controller), and a sequence circuit. The control device 14 is connected to the swivel actuators 201, 301, the chuck actuators 203, 303, and the belt tensioning operation unit 13 of the units 20 and 30, and these actuators 201, 203, 301, 303 and the belt. The operation of the tensioning operation unit 13 is controlled. The operations of the actuators 201, 203, 301, 303 and the belt tensioning operation unit 13 may be controlled by a switch operation by an operator.

The above is the schematic configuration of the reversing device 10. Next, the first reversing step (step S7) of the unvulcanized belt 8 by the reversing device 10 will be described. Since the second reversing step (step S9) of the unvulcanized belt 8 by the reversing device 10 is the same as the first reversing step, the description thereof will be omitted. FIG. 5 is a flowchart for explaining an example of the reversing step of the unvulcanized belt 8.

In the first reversing step, first, as shown in FIG. 6A, the unvulcanized belt 8 is set (inserted) between the pair of hands 212 and 212 of the first chuck 211 (step S101). Next, the second unit 30 is displaced downward by the operation of the belt tensioning operation unit 13 from the position in the standby state (step S102). As a result, the first engaging portion 204 and the second engaging portion 304 are given some tension to the unvulcanized belt 8 when the unvulcanized belt 8 is applied to the engaging portions 204 and 304. Arranged like this. Next, as shown in FIG. 6B, the unvulcanized belt 8 is hung on the second chuck 311 of the second engaging portion 304, and the chucks 211, are operated by the operations of the chuck actuators 203 and 303. 311 grabs the unvulcanized belt 8 (step S103).

Next, as shown in FIG. 7, the operation of the belt tensioning operation unit 13 causes the second engaging portion 304 of the second unit 30 to be displaced (downward) in the direction away from the first engaging portion 204. (Step S104). As a result, further tension acts on the unvulcanized belt 8, and it can be more easily visually recognized that the unvulcanized belt 8 is not twisted.

At this time, the second engaging portion 304 of the second unit 30 is displaced relatively much downward in order to apply sufficient tension to the unvulcanized belt 8. As a result, the first engaging portion 204 of the first unit 20 receives a large tension, and as a result, the first engaging portion 204 and the first arm 202 are displaced by a predetermined amount toward the second engaging portion 304. (The neck is broken) (step S105). At this time, the first arm 202 rotates until it is regulated by the stopper 214.

Next, as shown in FIG. 8 (B), which is a schematic cross-sectional view of the main portion of FIGS. 8 (A) and 8 (A), the second engaging portion 304 is operated by the operation of the belt tensioning operating portion 13. Is displaced so as to be returned to the first engaging portion 204 side (step S106). At this time, the arm 202 and the first engaging portion 204 of the first unit 20 are returned to the positions before the neck break (horizontal position) by the elastic restoring force of the elastic member 213. As a result, the unvulcanized belt 8 is in a loosened state, and the belt is ready for reversal. In this state, it is preferable that the turning radius of the first engaging portion 204 (the distance between the first engaging portion 204 in the radial direction of the output portion 210 and the central axis of the output portion 210) is secured at least about 150 mm. .. Similarly, it is preferable that the turning radius of the second engaging portion 304 (the distance between the second engaging portion 304 and the central axis of the output portion 310 in the radial direction of the output portion 310) is secured at least about 150 mm.

Next, as shown in FIG. 9B, which is a schematic cross-sectional view of the main portion of FIGS. 9A and 9A, either the first engaging portion 204 or the second engaging portion 304 On the other hand (in this embodiment, the first engaging portion 204) is swiveled by 180 ° around the output unit 210 by the operation of the corresponding first swivel actuator 201 (step S107). At this time, the first swivel actuator 201 swivels the first engaging portion 204 so that the first engaging portion 204 passes through the ring of the unvulcanized belt 8. In this step, as shown by the arrow R1, the first engaging portion 204 first swivels around the output portion 210 so as to proceed toward the second engaging portion 304, and then from the second engaging portion 304. It turns around the output unit 210 so as to be separated. As a result, the unvulcanized belt 8 is in a twisted state.

Next, as shown in FIG. 10 (B), which is a schematic cross-sectional view of the main portion of FIGS. 10 (A) and 10 (A), either the first engaging portion 204 or the second engaging portion 304 On the other hand (in this embodiment, the second engaging portion 304) is swiveled by 180 ° around the output portion 310 by the operation of the second swivel actuator 301 (step S108). At this time, the second swivel actuator 301 swivels the second engaging portion 304 so that the second engaging portion 304 passes through the ring of the unvulcanized belt 8. In this step, as shown by the arrow R2, the second engaging portion 304 first swivels around the output portion 310 so as to proceed toward the first engaging portion 204, and then from the first engaging portion 204. It turns around the output unit 310 so as to be separated. As a result, the unvulcanized belt 8 is inverted.

Next, as shown in FIG. 11A, the operation of the belt tensioning operation portion 13 causes the second engaging portion 304 of the second unit 30 to be separated from the first engaging portion 204 (downward). It is displaced (step S109). As a result, tension acts on the unvulcanized belt 8 and the entire unvulcanized belt 8 can be reliably inverted. This tension applying operation is performed, for example, for about 5 seconds. Further, at this time, the tension applied to the unvulcanized belt 8 by the first engaging portion 204 and the second engaging portion 304 is set to about 60 to 250 N. At this time, an operation similar to the neck breaking operation in step S105 occurs in the first unit 20.

Next, as shown in FIG. 11B, the operation of the belt tensioning operation unit 13 displaces the second engaging portion 304 so as to be returned to the first engaging portion 204 side (step S110). As a result, the unvulcanized belt 8 is in a loosened state. Further, the operation of the tension release mechanism 205 returns the first engaging portion 204 to the horizontal position. Next, the chucks 211 and 311 of the engaging portions 204 and 304 are opened by the operation of the chuck actuators 203 and 303 (step S111). As a result, the unvulcanized belt 8 can be taken out from the engaging portions 204 and 304, and the unvulcanized belt 8 is removed from the reversing device 10.

After that, the first engaging portion 204 and the second engaging portion 304 are returned to the initial positions by the operation of the turning actuators 201 and 301 and the operation of the belt tensioning operating portion 13. (Step S112). As a result, the first engaging portion 204 and the second engaging portion 304 are returned to the positions when step S101 is executed.

Conventionally, the belt reversing work is often performed manually one by one. However, according to the present embodiment, by using the reversing device 10, at least a part of the reversing work of the unvulcanized belt 8 can be automated. As a result, even if it is necessary to manually set the unvulcanized belts 8 one by one in the reversing device 10, it is possible to entrust the reversing work to the reversing device 10 which can finish the reversing work in a short time. Become. As a result, the work man-hours (working time) can be greatly reduced.

Further, when the worker manually inverts the unvulcanized belt 8 with both hands one by one, the wire diameter of the core wire 3 is large, the rigidity of the core wire 3 is high, and the unvulcanized rubber sheet before cutting. When the width of 2 and 5 is wide (the belt shape is large), this reversing work takes time. As a result, the core wire 3 may be separated from the unvulcanized rubber sheets 2 and 5, and the unvulcanized belt 8 may become a defective product. However, by performing the reversing work of the unvulcanized belt 8 with the reversing device 10, the reversing can be completed in a short time, so that a defective product occurs in which the core wire 3 is separated from the unvulcanized rubber sheets 2 and 5. Can be reduced.

Further, the reversing operation of the unvulcanized belt 8 can be completed in a short time by using the reversing device 10 by utilizing the time during the spinning process and the time during the cutting process. Therefore, the reversing step of the plurality of unvulcanized belts 8 manufactured from one unvulcanized sleeve 6 can be completed until the unvulcanized belt 8 from the next unvulcanized sleeve 6 is completed. Therefore, it is possible to suppress the occurrence of wasted time such as a waiting time for waiting for the completion of the reversing work of the unvulcanized belt 8 in the flow of the transmission belt molding process.

As described above, as a result of being able to complete the reversing step within the time required for the spinning step + the time required for the cutting step, it is possible to suppress a waiting time before starting the reversing work of the unvulcanized belt 8. .. As a result, it is possible to eliminate the unloaded molding work caused by the reversing process.

Further, in a series of steps such as a spinning step, a cutting step, a reversing step, a skiving step, and a cover winding step, the reversing step can be further synchronized with the steps before and after the reversing step. As a result, the reversing device 10 can contribute to further automation of a series of steps of transmission belt manufacturing.

Further, according to the reversing device 10, the reversing operation of the unvulcanized belt 8 and the tensioning operation of the unvulcanized belt 8 are both performed by the first engaging portion 204 and the second engaging portion 304. As described above, since the member for the reversing operation of the unvulcanized belt 8 and the member for the tensioning operation of the unvulcanized belt 8 are common (both engaging portions 204 and 304), the reversing device 10 The configuration can be simplified. Further, as compared with the case where the reversing operation of the unvulcanized belt 8 is performed entirely by hand, the reversing operation of the unvulcanized belt 8 using the reversing device 10 enables the reversing operation of the unvulcanized belt 8 in a shorter time. Can be completed. As a result, the work efficiency of the belt reversing operation can be further improved.

Further, according to the reversing device 10, the belt tensioning operation portion 13 is configured to displace the first engaging portion 204 and the second engaging portion 304 in the direction of relative approaching and the direction of relative distance. .. According to this configuration, the mode of relative movement of the first engaging portion 204 and the second engaging portion 304 for the belt tensioning operation can be simplified. As a result, the configuration of the belt tensioning operation unit 13 can be made simpler.

Further, according to the reversing device 10, the units 20 and 30 include the swivel actuators 201 and 301 and the arms 202 and 302, and the swivel operation of each arm 202 and 302 causes the first engaging portion 204 and the second engaging portion 204 and the second. The unvulcanized belt 8 held by the engaging portion 304 is configured to be inverted. According to this configuration, swivel actuators 201 and 301 corresponding to the first unit 20 and the second unit 30, respectively, are provided. As a result, the reversing operation of the unvulcanized belt 8 can be more reliably realized by the cooperation of the first engaging portion 204 and the second engaging portion 304. Further, the timing of reversing the unvulcanized belt 8 by the first engaging portion 204 (step S107), the timing of reversing the unvulcanized belt 8 by the second engaging portion 304 (step S108), and By shifting the above, it is possible to prevent an unintended unnecessary twist from remaining on the unvulcanized belt 8 when the inversion of the unvulcanized belt 8 is completed.

Further, according to the reversing device 10, the belt tensioning operation unit 13 is configured to perform the tensioning operation of the unvulcanized belt 8 by operating the second unit 30 of the first unit 20 and the second unit 30. ing. According to this configuration, the belt tensioning operation unit 13 can realize the belt tensioning operation and the belt tensioning release operation by operating only the second unit 30 of the first unit 20 and the second unit 30. Thereby, the configuration of the reversing device 10 can be further simplified through the simplification of the configuration of the belt tensioning operation unit 13.

Further, according to the reversing device 10, a tension relief mechanism 205 is provided. According to this configuration, the unvulcanized belt 8 held by the first engaging portion 204 and the second engaging portion 304 is tensioned by the operation of the first engaging portion 204 and the second engaging portion 304. At that time, when a large tension is momentarily generated, it is suppressed that the tension is excessively strong between the first engaging portion 204 and the second engaging portion 304. As a result, a defect caused by an excessive load acting on the unvulcanized belt 8 (for example, the core wire 3 of the unvulcanized belt 8 shifts with respect to the unvulcanized rubber sheets 2 and 5 of the unvulcanized belt 8). Things, etc.) can be suppressed more reliably.

Further, according to the reversing device 10, the tension release mechanism 205 is provided with the elastic member 213. According to this configuration, for example, when the belt tensioning operation is released, the rotational position of the first arm 202 to which the elastic member 213 is attached can be returned to the position before the tension release mechanism 205 operates. As described above, with a simple configuration in which the elastic member 213 is provided, the automatic return operation of the first arm 202 and the first engaging portion 204 supported by the first arm 202 can be realized.

Further, according to the reversing device 10, the engaging portions 204 and 304 include chucks 211 and 311 configured to grip the inner peripheral surface and the outer peripheral surface of the unvulcanized belt 8. According to this configuration, the unvulcanized belt 8 can be held by the chucks 211 and 311 by inserting the unvulcanized belt 8 into the chucks 211 and 311. In particular, if the unvulcanized belt 8 is in the vertical orientation (the orientation of the unvulcanized belt 8 in a state where the axial direction of the unvulcanized belt 8 is substantially horizontal), the unvulcanized belt 8 is attached to the chucks 211 and 311. By inserting, the chucks 211 and 311 can hold the unvulcanized belt 8 before the chucks 211 and 311 sandwich the unvulcanized belt 8 in a pressurized state. As a result, the labor of handling the unvulcanized belt 8 in the reversing device 10 can be reduced.

Further, the reversing device 10 has chuck actuators 203 and 303 for causing the chucks 211 and 311 to perform the operation of gripping the unvulcanized belt 8 and the operation of releasing the grip of the unvulcanized belt 8. There is. According to this configuration, the chucks 211 and 311 can grip the unvulcanized belt 8 and the chucks 211 and 311 can release the unvulcanized belts 8 by the chuck actuators 203 and 303.

The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and can be modified in various ways as long as it is described in the claims. For example, you may change it as follows.

(1) In the above-described embodiment, in the reversing step (steps S7 and S9) of the unvulcanized belt 8, in step S108 in which the second engaging portion 304 is swiveled by the second swivel actuator 301, FIG. ) And FIG. 10B, the mode in which the second engaging portion 304 is swiveled by 180 ° around the output portion 310 has been described as an example. However, this does not have to be the case.

For example, in step S108 described above, even if the unvulcanized belt 8 is subjected to a large tension enough to drive the tension relief mechanism 205 by turning the second engaging portion 304 at a turning angle larger than 180 °. Good. As a result, a more balanced and large tension can be applied to the unvulcanized belt 8. In this case, the second turning actuator 301 moves the second arm 302 and the second engaging portion 304 so that the load acting between the first engaging portion 204 and the second engaging portion 304 exceeds a predetermined value. Turn.

For example, as shown in FIG. 12A, in step S108, the output unit 310 of the second swing actuator 301 swivels the second arm 302 and the second engaging portion 304, for example, by about 180 ° plus several degrees. To do. As a result, the second engaging portion 304 strongly pulls the unvulcanized belt 8 downward during the turning of the second arm 302. As a result, the torque acting between the output unit 210 of the first turning actuator 201 and the first arm 202 exceeds a predetermined value. As a result, the first arm 202 swivels toward the second arm 302 against the elastic force of the elastic member 213, and sufficient tension can be applied to the unvulcanized belt 8.

Then, in the state where the tension release mechanism 205 is operating (neck broken state), and by the operation of the belt tensioning operation portion 13, as shown in FIG. 12B, the second engaging portion 304 of the second unit 30 is further operated. Is displaced (downward as indicated by the arrow D1) in a direction away from the first engaging portion 204 (step S109). As a result, tension acts on the unvulcanized belt 8 and the entire unvulcanized belt 8 can be reliably inverted. The operations of steps S108 and S109 are performed without a gap.

According to the above-described modified examples shown in FIGS. 12A and 12B, a core wire is formed between the unvulcanized rubber sheet 2 serving as the compressed rubber layer and the unvulcanized rubber sheet 5 serving as the stretched rubber layer. When the unvulcanized belt 8 having the structure in which 3 is sandwiched is inverted, it is possible to more reliably prevent the unvulcanized rubber sheets 2 and 5 from peeling off from each other. More specifically, when the unvulcanized belt 8 is held by the first engaging portion 204 and the second engaging portion 304, the first engaging portion 204 is used for the first turning of the first unit 20. When swiveled by the actuator 201, the unvulcanized belt 8 is in a twisted state. Next, when the second engaging portion 304 is swiveled by the second swivel actuator 301 of the second unit 30, the unvulcanized belt 8 is untwisted and the entire unvulcanized belt 8 is inverted. At this time, since the load acting between the first engaging portion 204 and the second engaging portion 304 exceeds a predetermined value, the load is attached to the first arm 202 provided with the tension relief mechanism 205. The first engaging portion 204 is displaced toward the second engaging portion 304 side. As a result, it is possible to perform an operation in which the load acting between the first engaging portion 204 and the second engaging portion 304 exceeds a predetermined value. By this operation, the unvulcanized rubber sheets 2 and 5 and the core wire 3 can be pressed against each other so as not to be peeled off. As a result, as described above, it is possible to prevent the unvulcanized rubber sheets 2 and 5 from peeling off from the core wire 3.

In the above-described modification, the unvulcanized belt is swiveled by the belt tensioning operation unit 13 after the operation (step S108) in which the second swivel actuator 301 swivels the second arm 302 to swivel the unvulcanized belt 8. The form in which 8 is stretched has been described as an example. However, this does not have to be the case. For example, step S108 and step S109 may be performed in parallel. That is, at the same time as the operation of turning the unvulcanized belt 8 by turning the second arm 302 by the second turning actuator 301 (step S108), the second engaging part 304 is lowered by the belt tensioning operation part 13. By doing so, the operation of stretching the unvulcanized belt 8 (step S109) may be performed.

(2) In the above-described embodiment, the arrangement is normal molding (molding in a state where a plurality of rubber sheets 2 and 5 are arranged so that the outer peripheral side of the annular material is the stretched rubber layer and the inner peripheral side is the compressed rubber layer). The unvulcanized sleeve 6 was molded in. After that, the unvulcanized sleeve 106 is cut at a predetermined width by the cutter 7 to form the unvulcanized belt 8, and the unvulcanized belt 8 is inverted by the reversing device 10 to form the unvulcanized belt. No. 8 was set to a reverse molding (molding in a state where a plurality of rubber sheets 2 and 5 are arranged so that the inner peripheral side of the annular material is the stretched rubber layer and the outer peripheral side is the compressed rubber layer). Then, the unvulcanized belt 8 in the reverse molding posture is subjected to a skiving step, and then the unvulcanized belt 8 is further inverted by the reversing device 10 to perform the cover winding step in the normal molding posture. Explained. However, this does not have to be the case. For example, the unvulcanized sleeve 6 may be molded in a reverse molding arrangement. In this case, the unvulcanized sleeve 106 is cut at a predetermined width by the cutter 7 to form the unvulcanized belt 8, and the unvulcanized belt 8 is inverted by the reversing device 10 to form the unvulcanized belt 8. Is the posture of vulcanization. Then, the unvulcanized belt 8 in the normal molding posture is subjected to a skiving step, and then the unvulcanized belt 8 is further inverted by the reversing device 10 to perform the cover winding step in the reverse molding posture. ..

(3) Further, in the above-described embodiment, the belt tensioning operation unit 13 operates the second unit 30 of the first unit 20 and the second unit 30 to perform the tensioning operation of the unvulcanized belt 8. It was composed of. However, this does not have to be the case. For example, the belt tensioning operation unit 13 may be configured to perform the tensioning operation of the unvulcanized belt 8 by operating the first unit 20 of the first unit 20 and the second unit 30. The unvulcanized belt 8 may be tensioned by operating both the units 20 and 30.

(4) Further, in the above-described embodiment, the embodiment in which the tension release mechanism 205 is provided in the first unit 20 will be described as an example. However, this does not have to be the case. The tension release mechanism 205 may be provided in the second turning actuator 301 of the second unit 30.

(5) Further, in the above-described embodiment, the configuration in which the reversing device 10 reverses the unvulcanized belt 8 in the vertically extended posture (vertical posture) has been described as an example. However, this does not have to be the case. The reversing device 10 may be configured to reverse, for example, the unvulcanized belt 8 in a horizontally extended posture (horizontal posture) or in a vertically inclined posture.

(6) Further, the present invention may be used for reversing a belt such as a finished product other than an unvulcanized belt, or may be used for reversing a transmission belt other than a wrapped V-belt.

<Comparison between the time required for belt reversing work using a reversing device and the time required for manual belt reversing work>
Under the following experimental conditions, the belt reversing work using the reversing device and the belt reversing work by hand were performed.
Experimental conditions of the example: Part of the manufacturing process of V-belt B type 60 inch size was carried out. The rolling process (step S1), the cutting process (step S2), the setting process (step S3) of winding the unvulcanized rubber sheet to be the compressed rubber layer on the inner peripheral side of the belt around the mantle, and the spinning of the core wire shown in FIG. Step (step S4), upper sheet pasting step (step S5) to complete the unvulcanized sleeve by further winding the unvulcanized rubber sheet to be the stretched rubber layer on the outer peripheral side of the belt, the unvulcanized sleeve is placed at predetermined intervals. A cutting step (step S6) of forming an unvulcanized belt by cutting with a cutter, and a reversing step of inverting the unvulcanized belts one by one with a reversing device after manually removing the unvulcanized belt from the mantle. (Step S7) was performed. When the unvulcanized belt is pulled out from the mantle, the unvulcanized belts (cores) are separated one by one, and then the operation of setting the unvulcanized belt in the reversing device is repeated to form a plurality of unvulcanized belts. It was continuously inverted with an inversion device.

Experimental conditions of Comparative Example: After the same steps as in steps S1 to S6, the unvulcanized belts were manually removed from the mantle and then the unvulcanized belts were manually inverted one by one. In the comparative example, when the unvulcanized belt was pulled out from the mantle, each of the plurality of unvulcanized belts was separated from each other, and the unvulcanized belt was manually inverted from this state.

In both the unvulcanized belt of the example and the unvulcanized belt of the comparative example, the unvulcanized belt does not come apart due to the adhesive force of the unvulcanized rubber sheets on the compression side and the expansion side. It is maintained. Further, in each of the examples and the comparative examples, 45 unvulcanized belts were prepared from one unvulcanized sleeve, and these 45 unvulcanized belts were inverted one by one in order.

The results are shown in Table 1.

In the embodiment, it takes about 9 seconds to reverse one unvulcanized belt with a reversing device and return the unvulcanized belt to the cradle, which is a total of 45 unvulcanized belts. It took 405 seconds. On the other hand, in the comparative example, it takes about 14 seconds to manually invert one unvulcanized belt and return the unvulcanized belt to the cradle, and the inversion work of 45 unvulcanized belts. It took a total of 630 seconds.

Here, the time required for the spinning step as the pre-step of the reversing step was about 360 seconds. Similarly, the time required for the cutting step as the pre-step of the reversing step was about 180 seconds. Therefore, the time required for the above two steps, which is the pre-step of the reversing step, was 360 + 180 = 540 seconds.

In the comparative example, the time required to complete the inversion of one lot (45 belts) of unvulcanized belts (630 seconds) greatly exceeded the total time required for the spinning process and the cutting process (540 seconds). .. As a result, when the spinning step, the cutting step, and the reversing step are repeated, the reversing operation of each unvulcanized belt of the previous lot before the spinning step and the cutting step of the latest lot are completed. Will not be completed. That is, in the comparative example, the time required for the reversing step (630 seconds) is longer than the time required for the previous step (540 seconds), and the reversing operation of the unvulcanized belt of the next lot in the reversing step. There will be a waiting time before starting. That is, there will be leftovers in the transmission belt manufacturing process.

On the other hand, in the embodiment, the time (405 seconds) for completing the inversion of one lot (45 belts) of unvulcanized belts is sufficiently less than the total time required for the spinning process and the cutting process (540 seconds). Was there. As a result, when the spinning step, the cutting step, and the reversing step are repeated, the reversing operation of each unvulcanized belt of the previous lot before the spinning step and the cutting step of the latest lot are completed. Will be completed. That is, in the embodiment, the time required in the reversing step (405 seconds) is less than the time required in the previous step (540 seconds), and the reversing work of the next lot unvulcanized belt is started in the reversing step. It is possible to suppress the occurrence of waiting time. That is, it was proved that the leftovers in the transmission belt manufacturing process can be eliminated.

The present invention can be widely applied as a reversing device.

8 Unvulcanized belt (belt)
10 Reversing device 12 Reversing operation unit 13 Belt tensioning operation unit 20 1st unit 30 2nd unit 201,301 Swivel actuator 202, 302 Arm 203, 303 Chuck actuator 204 1st engagement part 205 Tension relief mechanism 210 Output unit 213 Elastic member 211,311 Chuck 304 2nd engaging part

Claims (7)

It has a first engaging portion and a second engaging portion for holding the endless belt, and the position of the inner peripheral portion and the outer peripheral portion of the belt are determined by the operation of the first engaging portion and the second engaging portion. A reversing operation unit configured to perform a reversing operation that swaps positions,
A belt tensioning operation unit for relatively operating the first engaging portion and the second engaging portion so as to perform the belt tensioning operation and release the tensioning operation, and
Equipped with a,
The reversing operation unit includes a first unit including the first engaging portion and a second unit including the second engaging portion.
Each said unit includes a swivel actuator and an arm that is swiveled and supported by the swivel actuator to support the corresponding first and second engaging portions.
The belt held by the first engaging portion and the second engaging portion is configured to be inverted by the turning operation of each of the arms.
When the load acting between the first engaging portion and the second engaging portion exceeds a predetermined value when the first engaging portion and the second engaging portion hold the belt. A reversing device, further comprising a tension relief mechanism for displacing any one of the first engaging portion and the second engaging portion to the other side by a predetermined amount . In the reversing device according to claim 1,
The belt tensioning operation portion is a reversing device characterized in that the first engaging portion and the second engaging portion are displaced in a direction in which they are relatively close to each other and a direction in which they are relatively far away from each other. .. The reversing device according to claim 1 or 2 .
The reversing device is characterized in that the belt tensioning operation unit is configured to perform the belt tensioning operation by operating either the first unit or the second unit. The reversing device according to any one of claims 1 to 3 .
The swivel actuator includes an output unit to which the arm is attached.
The tension release mechanism is a reversing device including an elastic member for applying an elastic force between the output unit and the arm so that the arm is arranged at a predetermined position. The reversing device according to any one of claims 1 to 4 .
The swivel actuator is configured to swivel the arm and the corresponding engaging portion so that the load acting between the first engaging portion and the second engaging portion exceeds a predetermined value. A reversing device characterized by being present. The reversing device according to any one of claims 1 to 5 .
A reversing device, wherein each engaging portion includes a chuck configured to grip the inner and outer peripheral surfaces of the belt. The reversing device according to claim 6 .
A reversing device further comprising a chuck actuator for causing the chuck to perform an operation of gripping the belt and an operation of releasing the grip of the belt.

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