JP2011013107A - Rotating device and inspection device of the ring-like work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection device capable of laying a ringlike work over rollers using a simple constitution.SOLUTION: The general surface 37 of a table 14, provided with a substantially triangular hole 13 for housing rollers 17, 18 and 19 is held so as to have the same height as that of the lower edge 101 of the work 16 run by the rollers 17, 18 and 19 and a downward-inclined tapered surface 38 is provided to the edge of the substantially triangular hole 13. By laying the work 16 over the rollers 17, 18 and 19, the moving roller 19 is moved to transfer the work to the rollers 17, 18 and 19 from the general surface 37. That is, a jig for laying the work over the rollers or an actuator for lifting the rollers can be dispensed with.

Description

  The present invention provides a rotating device that applies tension to a ring-shaped workpiece and rotates the workpiece, and a wrinkle or hammer that may be present at the edge of the ring-shaped workpiece while the rotating device is mounted and rotated. The present invention relates to an inspection apparatus for detecting a mark.

  In the process of manufacturing, wrinkles and dents may occur on the edge of a ring-shaped workpiece such as a continuously variable transmission belt. This ring-shaped workpiece cannot be used if there are harmful folds or dents. Accordingly, it is necessary to inspect for wrinkles and dents on the edge of such a ring-shaped workpiece. An apparatus used for such inspection is known (see, for example, Patent Document 1 (FIG. 2)).

Patent document 1 is demonstrated based on the following figure.
As shown in FIG. 10A, the inspection device 200 includes a rotating device 200a and a camera (FIG. 10B, reference numeral 207).
The rotating device 200 a includes a driving roller 202 and a moving roller 203 arranged on a table 201, a spring 204 that pulls the moving roller 203 horizontally, and a transfer clamp that is arranged along the driving roller 202 and the moving roller 203. 205.

  First, the ring-shaped workpiece 206 is moved to predetermined positions on the driving roller 202 and the moving roller 203 by the transfer clamp 205. Next, the moving roller 203 is moved horizontally by the spring 204. As a result, the ring-shaped workpiece 206 is stretched between the driving roller 202 and the moving roller 203.

  When the ring-shaped workpiece 206 is set, the transfer clamp 205 is moved backward, and the drive roller 202 is operated to rotate the ring-shaped workpiece 206 as shown in FIG. The upper edge 209 is imaged and inspected for wrinkles and dents.

  By the way, since the inspection is performed while the ring-shaped workpiece 206 is circulated, it is necessary to set the lower edge 211 of the ring-shaped workpiece 206 in a state where it floats from the upper surface of the table 201. For this reason, this inspection device 200 (rotating device 200a) requires a transfer clamp ((a) reference numeral 205), an actuator for moving the head forward and backward, and the like. Many parts are required, which increases the manufacturing cost of the inspection device (rotating device).

  In order to reduce the manufacturing cost of the rotating device or the inspection device, a technique capable of eliminating the transfer clamp is desired.

JP 2006-258576 A

  An object of the present invention is to provide a rotating device or an inspection device that does not require a transfer clamp.

According to the first aspect of the present invention, a driving roller and a moving roller are interposed inside a ring-shaped workpiece, and the workpiece is tensioned by moving the moving roller. In this state, the workpiece is used by using the driving roller. In the ring-shaped workpiece rotating device that circulates
A table provided with holes for accommodating the driving roller and the moving roller is attached to the driving roller and the moving roller, and a general surface on the table is a lower edge of the work which is driven by the driving roller and the moving roller. The hole is held away from the general surface when the workpiece placed on the general surface on the table is tensioned by the driving roller and the moving roller. It is provided.

According to a second aspect of the present invention, three rollers each including a driving roller, a driven roller, and a moving roller are interposed inside a ring-shaped work so as to form a triangular apex, and the moving roller is moved. In the inspection device for a ring-shaped workpiece for detecting wrinkles and dents that may exist on the upper edge of the workpiece while tensioning the workpiece and rotating the workpiece in this state,
A table having a substantially triangular hole for accommodating the driving roller, driven roller, and moving roller is attached to the driving roller, driven roller, and moving roller, and a general surface on the table has the driving roller, driven roller, and the like. The work held on the general surface of the table is held in tension by the drive roller, the driven roller, and the moving roller. A tapered surface inclined downward is provided at the edge of the substantially triangular hole so as to be away from the general surface.

  The invention according to claim 3 is characterized in that the workpiece is a ring of a continuously variable transmission belt that is used as a continuously variable transmission belt by stacking a plurality of workpieces.

  In the invention according to claim 1, the general surface on the table is held so as to be at the same height as the lower edge of the workpiece, and a hole for storing the driving roller and the moving roller is provided. By moving the moving roller, the work is transferred from the general surface toward the driving roller and the moving roller. The lower edge of the transferred workpiece is disposed above the hole and does not contact the general surface. That is, when placing the workpiece, there is no need for a clamp for hanging the workpiece on the roller or an actuator for moving the clamp. For this reason, the number of parts can be reduced, and the rotating device can be manufactured at a low manufacturing cost.

  In the invention according to claim 2, the general surface on the table is held so as to be at the same height as the lower edge of the workpiece, and a substantially triangular hole is provided to accommodate the driving roller, the driven roller, and the moving roller. . By moving the moving roller, the work is transferred from the general surface toward the driving roller, the driven roller, and the moving roller. The lower edge of the transferred workpiece is disposed above the substantially triangular hole or the tapered surface, and does not contact the general surface. That is, when placing the workpiece, there is no need for a clamp for hanging the workpiece on the roller or an actuator for moving the clamp. For this reason, the number of parts can be reduced, and the inspection apparatus can be manufactured at a low manufacturing cost.

  In the invention which concerns on Claim 3, a workpiece | work is a ring of the belt for continuously variable transmissions used as a belt for continuously variable transmissions by laminating | stacking two or more. Since the ring of a continuously variable transmission belt is mass-produced, cost reduction is strongly required. Compared with the case where a transfer clamp is used, in the present invention, since the workpiece can be quickly attached to and detached from the roller, the inspection time can be shortened, and the manufacturing cost of the ring of the continuously variable transmission belt can be reduced. By reducing the manufacturing cost of the ring, the manufacturing cost of the continuously variable transmission belt can also be reduced.

It is a perspective view of the ring-shaped workpiece inspection apparatus according to the present invention. FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1. It is a top view of the table concerning the present invention. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is operation | movement explanatory drawing at the time of setting a ring-shaped workpiece | work to a roller. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 5. It is a block block diagram of the control means used by this invention. It is a flowchart explaining the inspection method of the ring-shaped workpiece | work which concerns on this invention. It is a figure explaining the basic principle of the prior art.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a ring-shaped workpiece inspection apparatus 10 includes a base 12 supported by a leg 11, a table 14 provided on the upper surface of the base 12 and provided with a substantially triangular hole 13, and A driving roller 17, a driven roller 18, a moving roller 19, and a driving roller 17 that are provided on the inner peripheral side of the hole 13 of the table 14 and on which a ring-shaped workpiece 16 such as a continuously variable transmission belt is laid. Between the driving roller 17 and the driven roller 18, the driving means 21 for rotating the workpiece 16, the moving means 22 for supporting the moving roller 19 and moving the moving roller 19 in the front-rear direction (left-right direction in the drawing). An image pickup means 23 for picking up an image of the work 16 arranged and circulated above, an image pickup means support box 24 that supports the image pickup means 23 and indicated by an imaginary line, An image pickup means lift 25 that moves the image pickup means 23 up and down by supporting the support box 24 so as to be able to move up and down, and an image pickup that moves the image pickup means 23 in the front and rear direction by supporting the image pickup means lift 25 so that it can move in the front and rear directions A means mover 26 and control means (reference numeral 113 in FIG. 8) connected to the image pickup means 23 and controlling the image pickup means 23.

  According to this ring-shaped workpiece inspection apparatus 10, the workpiece 16 is rotated by rotating the driving roller 17 by the driving means 21. The upper edge of the workpiece 16 is imaged by the imaging means 23 provided on the upper side in a state where the workpiece 16 is circulated. The captured image is confirmed, and a pass / fail determination unit (FIG. 5, reference numeral 112) determines the pass / fail of the workpiece 16. If there are wrinkles or dents larger than a predetermined size, the workpiece 16 is rejected. On the other hand, when there are no wrinkles or dents larger than a predetermined size, the workpiece 16 is passed.

  In other words, the table 14 and the driving roller 17, the driven roller 18, the moving roller 19, and the driving roller 17 that are provided on the inner peripheral side of the hole 13 of the table 14 are connected to the driving roller 17 to rotate the driving roller 17, thereby rotating the work 16. Rotating device 28 is constituted by driving means 21 for moving and moving means 22 for supporting moving roller 19 and moving moving roller 19 in the front-rear direction. The rotating device 28 sets the work 16 and rotates the work 16. By inspecting the rotating workpiece 16, the inspection apparatus 10 performs inspection.

The hole 13 of the table 14 is shaped so as to follow the work 16 when the work 16 is stretched over the driving roller 17, the driven roller 18, and the moving roller 19.
Hereinafter, the inspection apparatus will be described in a unified manner.

Details of the moving means 22 and the like will be described with reference to the next figure.
As shown in FIG. 2, the moving roller 19 is supported by a support plate 32 connected to the tip of the piston rod 31. By moving the piston rod 31 in the front-rear direction (the left-right direction in the drawing), the moving roller 19 is also moved together with the support plate 32, and the tension of the work 16 mounted on the driving roller 17, the driven roller 18, and the moving roller 19 is changed.

Further, a work height detecting means 33 for detecting the height at which the work 16 is disposed is disposed so as to sandwich the work 16 disposed between the driving roller 17 and the driven roller 18. The workpiece height detection unit 33 includes a light emitting unit 34 and a light receiving unit 35.
Details of the table 14 will be described with reference to the following figure.

  As shown in FIG. 3, the driving roller 17, the driven roller 18, and the moving roller 19 are accommodated in a substantially triangular hole 13 provided in the table 14. A tapered surface 38 that is inclined downward from the general surface 37 of the table 14 toward the hole 13 is provided.

  The tapered surface 38 is a long triangular first tapered surface 38 a provided from the periphery of the driving roller 17 toward the moving roller 19, and a long triangular first electrode 38 a provided from the peripheral edge of the driven roller 18 toward the moving roller 19. A first taper surface 38b, a third taper surface 38c formed in a semicircular shape from the first taper surface 38a along the periphery of the driving roller 17 and extending linearly from here to the driven roller 18, and a second taper surface A fourth tapered surface 38d is formed in a semicircular shape along the peripheral edge of the driven roller 18 from 38b and extends linearly toward the driving roller 17 therefrom.

On the general surface 37 of the table 14, an overhang portion 39 is formed between the drive roller 17 and the moving roller 19 so as to project toward the work 16 that is in a tension state. A protruding portion 39 is similarly formed between the driven roller 18 and the moving roller 19.
Details of the roller will be described with reference to the following figure.

  As shown in FIG. 4, the drive roller 17 is supported by a drive roller support unit 41 fitted to the base 12.

  The drive roller support unit 41 includes a cylindrical body 42 fitted to the base 12, bearings 43 and 44 arranged vertically on the inner peripheral surface of the cylindrical body 42, and a cylindrical body via these bearings 43 and 44. The first rotating shaft 45 supported by 42 is a main component.

The bearing 43 is restricted from moving upward by a protrusion 46 provided on the inner peripheral surface of the cylindrical body 42, and includes an inner cylinder 47 disposed below the inner ring and an outer cylinder 48 disposed below the outer ring. The downward movement is restricted.
A seal 49 that prevents dust from entering the bearing 43 is disposed on the upper surface of the protrusion 46.

  On the lower surface of the bearing 44, a lid 54 fixed to the flange 51 at the lower end of the cylindrical body 42 with bolts 53, 53 and a seal disposed on the inner peripheral side of the lid 54 to prevent dust from entering the bearing 44 55 and a collar 56 disposed on the inner peripheral side of the seal 55 to prevent the seal 55 from being crushed.

The bearing 44 is restricted from moving upward by the inner cylinder 47 and the outer cylinder 48, and is restricted from moving downward by the lid 54 and the collar 56.
The collar 56 is fixed by a nut 57.

  The drive roller 17 is mounted on the upper surface of the large-diameter portion 58 of the first rotation shaft 45 and then fixed by a nut 59.

  A coupling 61 is fitted to the lower end of the first rotating shaft 45, and the driving shaft 62 of the driving means 21 is fitted to the coupling 61.

  The driving means 21 is supported by a portal bracket 64 that is lowered from the base 12 using bolts 67 and nuts 68.

  The drive roller 17 is configured by fixing work removal prevention members 72 and 73 that prevent the work 16 from coming off from the roller body 71 with bolts 74 and 75.

  The driven roller support unit 77 that supports the driven roller 18 also has the same structure as the drive roller support unit 41.

  The driven roller support unit 77 includes a cylindrical body 78 fitted to the base 12, bearings 79, 81 arranged vertically on the inner peripheral surface of the cylindrical body 78, and the cylindrical body via these bearings 79, 81. The second rotating shaft 82 supported by 78 is a main component.

The bearing 79 is restricted from moving upward by a projection 83 provided on the inner peripheral surface of the cylindrical body 78, and includes an inner cylinder 84 disposed below the inner ring and an outer cylinder 85 disposed below the outer ring. The downward movement is restricted.
A seal 86 that prevents dust from entering the bearing 79 is disposed on the upper surface of the protrusion 83.

  On the lower surface of the bearing 81, a lid 89 fixed to the flange 87 at the lower end of the cylindrical body 78 with bolts 88, 88 and a seal disposed on the inner peripheral side of the lid 89 to prevent dust from entering the bearing 81 91 and a collar 92 that is disposed on the inner peripheral side of the seal 91 and prevents the seal 91 from being crushed.

The bearing 81 is restricted from moving upward by the inner cylinder 84 and the outer cylinder 85, and is restricted from moving downward by the lid body 89 and the collar 92.
The collar 92 is fixed by a nut.

  The driven roller 18 is mounted on the upper surface of the large-diameter portion 93 of the second rotating shaft 82 and then fixed by the nut 94.

  The driven roller 18 is configured by fixing work removal prevention members 96 and 97 that prevent the work 16 from coming off from the roller body 95 with bolts 98 and 99.

  When the driving means 21 is operated and the driving roller 17 is rotated, the work 16 laid around this also rotates, and the driven roller 18 and the moving roller 19 are also rotated by rotating the work 16.

When the first rotating shaft 45 is rotated, the inner rings of the bearings 43 and 44, the inner cylinder 47, and the collar 56 that are in contact with the first rotating shaft 45 are rotated together with the first rotating shaft 45.
On the other hand, the outer ring of the bearings 43 and 44, the outer cylinder 48, the lid 54, and the seals 49 and 55 do not rotate.
The same applies to the second rotating shaft 82.

  By moving the piston rod 31 in the drawing front / back direction, the moving roller 19 moves in the drawing front / back direction.

The operation of the driving roller 17, the driven roller 18, and the moving roller 19 described above will be described next.
As shown in FIG. 5A, the moving roller 19 is first retracted (left side in the drawing). Next, the workpiece 16 is placed on the general surface 37 of the table 14. At this time, the work 16 is placed so that the driving roller 17, the driven roller 18, and the moving roller 19 are accommodated on the inner peripheral surface side of the work 16.

  Next, as shown in (b), the moving roller 19 is moved forward (right side of the drawing). As a result, the workpiece 16 is gradually transferred from the general surface 37 of the table 14 toward the driving roller 17, the driven roller 18, and the moving roller 19.

From this state, the moving roller 19 is further advanced.
As shown in (c), when the moving roller 19 is advanced to a position where a predetermined tension is applied to the workpiece 16, the replacement of the workpiece 16 is completed.

  At this time, as shown in FIG. 6, the workpiece 16 is in close contact with the side surface of the driven roller 18. The workpiece 16 is placed like the left-side workpiece 16a indicated by the imaginary line, and by moving the moving roller (FIG. 5C, reference numeral 19) forward, it is like the right-side workpiece 16b indicated by the imaginary line. Thus, it is moved on the general surface 37.

  The workpiece 16 b that has moved on the general surface 37 is transferred from the edge 102 of the general surface 37 to the driven roller 18.

  When the length from the edge portion 102 to the driven roller 18 is short, the distance for replacement is shortened. By shortening the transfer distance, it is possible to prevent the workpiece 16 from falling into the hole 13 and to perform the transfer more reliably.

  In particular, the driving roller (FIG. 5C, reference numeral 17) and the driven roller 18 are not moved. For this reason, even if the general surface 37 is extended to the vicinity of each roller, it does not interfere with other parts. For this reason, it is desirable to extend the edge 102 of the general surface 37 to the vicinity of the drive roller or the driven roller 18. Specifically, the third tapered surface (FIG. 5C, reference numeral 38c) and the fourth tapered surface 38d are arranged along the driving roller and the driven roller 18.

  The workpiece 16a corresponds to the workpiece 16 shown in FIG. 5A, and the workpiece 16b corresponds to the workpiece 16 shown in FIG.

As shown in FIG. 7, the workpiece 16 is stretched from the side surface of the driven roller 18 in a tensioned state toward the moving roller (FIG. 5C, reference numeral 19). The workpiece 16 is placed like the right-side workpiece 16c indicated by the imaginary line, and the general surface 37 (the overhang portion) is moved like the left-side workpiece 16d indicated by the imaginary line by moving the moving roller forward. 39) Moved up.
The workpiece 16 d that has moved on the general surface 37 is transferred from the edge portion 102.

  At this time, by providing the overhanging portion 39, the workpiece 16 can be supported by the general surface 37 of the table 14 until immediately before the replacement is completed. Specifically, the workpiece 16 d is supported by the general surface 37 due to the presence of the overhang portion 39.

  Conversely, when there is no overhanging portion 39, the workpiece 16e is not supported by the general surface 37. By arranging the overhanging portion 39 in this way, the workpiece 16 can be supported on the general surface 37 of the table 14 until immediately before the replacement is completed. By shortening the transfer distance, it is possible to prevent the workpiece 16 from falling into the hole 13 and to perform the transfer more reliably.

  The workpiece 16c corresponds to the workpiece 16 shown in FIG. 5A, and the workpiece 16d corresponds to the workpiece 16 shown in FIG. 5B.

5 to 7 can be summarized as follows.
The general surface 37 on the table 14 is held at the same height as the lower edge 101 of the workpiece 16, and is formed at the edge of the substantially triangular hole 13 that houses the driving roller 17, the driven roller 18, and the moving roller 19. A tapered surface 38 that slopes toward is provided. By moving the moving roller, the work 16 is transferred from the general surface 37 toward the driving roller 17, the driven roller 18, and the moving roller 19. The lower edge 101 of the work 16 hung on the driving roller 17, the driven roller 18, and the moving roller 19 does not contact the general surface 37 because the edge of the substantially triangular hole 13 is a tapered surface 38. In other words, when the work 16 is disposed, a clamp for hanging the work 16 on the driving roller 17, the driven roller 18, and the moving roller 19 and an actuator for moving the clamp are not required. For this reason, the number of parts can be reduced, and the ring-shaped workpiece inspection apparatus 10 (rotating apparatus) can be manufactured at a low manufacturing cost.

In addition, the workpiece 16 can be hung on the driving roller 17, the driven roller 18, and the moving roller 19 simply by moving the moving roller 19. In order to lift the lower edge 101 of the workpiece 16, it is not necessary to use a transfer clamp. In addition, it is not necessary to lower the table 14 or raise the driving roller 17, the driven roller 18, and the moving roller 19. That is, the workpiece 16 can be easily set only by moving the moving roller 19. Since the workpiece 16 can be easily set, the number of man-hours for inspecting the workpiece is reduced, and the inspection can be performed in a short time.
The workpiece 16 set in this way is inspected. The inspection will be described in detail in the next figure.

As shown in FIG. 8, the first rotation detecting means 105 such as a rotary encoder is connected to the driving means 21 in order to measure the rotation speed of the driving roller 17.
The driven roller 18 is also connected with second rotation detecting means 106 such as a rotary encoder in order to measure the rotational speed of the driven roller 18.

These first and second rotation detecting means 105 and 106 are connected to a slip determining unit 107 for calculating the obtained rotation speed, and the slip determining unit 107 is a control for operating the imaging means 23. Connected to the unit 108. A work height detection means 33 is also connected to the control unit 108.
The upper edge 111 of the workpiece 16 imaged by the imaging means 23 is displayed on the monitor 112.

  That is, the control means 113 for controlling the image pickup means 23 includes first and second rotation detection means 105 and 106, a slip determination part 107, a workpiece height detection means 33, and a control part 108. .

  In order to inspect the workpiece 16, first, the workpiece height detection unit 33 detects the height of the upper edge 111 of the workpiece 16 and performs imaging so that the distance from the upper edge 111 to the imaging unit 23 becomes a predetermined distance. The means 23 is moved.

  Next, the driving roller 21, the driven roller 18, the moving roller 19 and the work 16 are rotated by operating the driving means 21. After a predetermined time has elapsed, the number of rotations of the driving roller 17 is measured by the first rotation detecting unit 105, and the number of rotations of the driven roller 18 is measured by the second rotation detecting unit 106.

The slip determination unit 107 calculates whether the difference between the rotational speed of the driving roller 17 and the rotational speed of the driven roller 18 is within a predetermined range. When this difference is within a predetermined range, the control unit 108 activates the imaging unit 23 and starts the inspection of the workpiece 16.
The image of the upper edge 111 is recognized by the pass / fail determination unit 112, and the pass / fail determination unit 112 determines the pass / fail of the workpiece 16.

  On the other hand, if the difference between the rotational speed of the driving roller 17 and the rotational speed of the driven roller 18 is not within a predetermined range, the inspection is not started until the difference in rotational speed is within the predetermined range.

  Since the driving roller 17 is rotated by the driving means 21 at a predetermined number of rotations, a difference occurs between the number of rotations of the driving roller 17 and the number of rotations of the driven roller 18 when the driven roller 18 rotates idle. When an image of the upper edge 111 in a state where slipping has occurred is taken, a pass / fail mark is projected on the pass / fail judgment unit 112 with a size different from the actual size. As a result, the workpiece 16 that should actually pass may be rejected, or the workpiece 16 that should actually fail may be passed.

  It is determined whether or not slip has occurred between the workpiece 16 and the driven roller 18. The inspection is started after obtaining the determination that no slip has occurred. By performing the inspection in a state where no slip has occurred, it is possible to accurately image the wrinkles and dents. Inspection accuracy can be increased.

That is, the accuracy of the inspection is enhanced by setting the inspection start condition that the difference in rotational speed is within a predetermined range.
A workpiece inspection method using the ring-shaped workpiece inspection apparatus 10 will be described with reference to the next drawing.

  In order to inspect the workpiece as shown in FIG. 9, first, in step (hereinafter referred to as “ST”) 10, the workpiece is placed so as to surround the driving roller, the driven roller, and the moving roller, and the moving roller is advanced. To set the work (ST11).

  When the height of the set work is detected by the work height detection means (ST12) and the imaging means is moved so that the distance from the upper edge of the work becomes a predetermined distance (ST13), the drive means and the drive roller are moved. The work is made to circulate by operating (ST14).

  Next, the first rotation detecting means measures the rotational speed R1 of the driving roller as the driving roller (ST15), and the second rotation detecting means measures the rotational speed R2 of the driven roller as the driven roller (ST16). Based on these pieces of information, the slip determination unit determines whether the difference between R1 and R2 is larger or smaller than the tolerance α (ST17).

  If it is smaller than the tolerance α, that is, if it is included in the tolerance α, the workpiece inspection is started by operating the imaging means (ST18), and if it is larger than the tolerance α, that is, included in the tolerance α. If not, the process returns to ST16.

  In addition, although the workpiece | work inspection apparatus and rotation apparatus which concern on this invention demonstrated the example of the test | inspection of the ring of the belt for continuously variable transmissions, a workpiece | work is not limited to these.

  The inspection device and the rotation device of the present invention are suitable for inspection of a ring of a continuously variable transmission belt.

  DESCRIPTION OF SYMBOLS 10 ... Ring-shaped workpiece inspection device, 13 ... Hole, 14 ... Table, 16 ... Workpiece (belt for continuously variable transmission), 17 ... Drive roller, 18 ... Driven roller, 19 ... Moving roller, 28 ... Rotating device, 37 ... General surface, 38 ... Tapered surface, 101 ... Lower edge, 111 ... Upper edge.

Claims (3)

A ring-shaped workpiece is formed by interposing a driving roller and a moving roller inside the ring-shaped workpiece, and tensioning the workpiece by moving the moving roller, and rotating the workpiece using the driving roller in this state. In the rotating device,
A table provided with holes for accommodating the driving roller and the moving roller is attached to the driving roller and the moving roller, and a general surface on the table is a lower edge of the work which is driven by the driving roller and the moving roller. When the workpiece placed on the general surface on the table is tensioned by the driving roller and the moving roller, the hole is separated from the general surface. A rotating device for a ring-shaped workpiece, which is provided. In this state, three rollers consisting of a driving roller, a driven roller and a moving roller are interposed inside the ring-shaped workpiece so as to form a triangular apex, and the moving roller is moved to tension the workpiece. In the ring-shaped workpiece inspection device for detecting wrinkles and dents that may exist on the upper edge of the workpiece while rotating the workpiece using the drive roller,
A table having a substantially triangular hole for accommodating the driving roller, driven roller, and moving roller is attached to the driving roller, driven roller, and moving roller, and a general surface on the table has the driving roller, driven roller, and the like. The work held on the general surface of the table is held in tension by the drive roller, the driven roller, and the moving roller. An inspection apparatus for a ring-shaped workpiece, wherein a tapered surface inclined downward is provided at an edge of the substantially triangular hole so as to be separated from the general surface.   3. The ring-shaped workpiece inspection apparatus according to claim 1, wherein the workpiece is a ring of a continuously variable transmission belt that is used as a continuously variable transmission belt by stacking a plurality of the workpieces.

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