JP2013144333A - Apparatus and method for assembling seal ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automate a process of assembling a seal ring for reducing manual work, while maintaining or improving assembly quality of the seal ring.SOLUTION: An apparatus for assembling a seal ring includes a cam shape part 4c holding the seal ring S1 in a diameter expanded state from an original shape and guiding it to a mounting groove 100. The cam shape part 4c has such a contour that one end part 20 of the seal ring S1 in a sectional view is held at an inner circumferential side of the other end part 30 and that, when mounting the seal ring S1 to the mounting groove 100, the one end part 20 of the seal ring S1 is led to the mounting groove 100 before the other end part 30 by restoring force to the original shape of the seal ring S1 when moving the seal ring S1 to the mounting groove 100 along the cam shape part 4c.

Description

  The present invention relates to a seal ring assembly apparatus and a seal ring assembly method. Specifically, at the end of the joint, a step is formed at least in the radial direction, and the other end having a step where the outer diameter side protrudes from the inner diameter side, whereas the other end portion has a step where the inner diameter side projects from the outer diameter side. The present invention relates to a seal ring assembling apparatus and a seal ring assembling method for assembling seal rings overlapping from the outside.

Conventionally, a seal ring has been fitted into a seal ring mounting groove formed on an edge of a lid-like workpiece (piston) by an operator's manual work.
Then, the lid-like work to which the seal ring is attached is assembled to a bowl-like work such as a CVT movable pulley by an operator's manual work, and then pressed by a press-fitting machine to assemble the bowl-like work.

  In such an assembly process, an operator needs to perform the work at high speed in order to improve the efficiency of the work of assembling the bowl-shaped work. When the worker performs the work at high speed, the burden on the worker is large, and a human error may occur.

Therefore, it is considered to automate the assembly process of the seal ring.
For example, Patent Document 1 discloses an insertion guide for a ring-shaped member that can be stably pushed out even if the corners of the cross-section are arc-shaped and the ring is thin.
Patent Document 2 discloses a ring assembling method capable of efficiently and reliably assembling a ring having a coupling portion at an abutment portion into an annular groove portion to be assembled.

Japanese Utility Model Publication No. 6-9828 JP 2005-349547 A

Here, the seal ring to be mounted in the mounting groove of the lid-like workpiece has an outer diameter with respect to one end portion having a step formed at least in the radial direction at the joint and having a step protruding on the inner diameter side from the outer diameter side. The other end portion having a step that protrudes from the inner diameter side overlaps from the outside.
In such a seal ring, the other end overlaps with one end from the outside, so it is necessary to shift the mounting timing of the one end and the other end in the mounting groove. It was considered difficult to automate the process.

  The present invention solves the above-described problems, and an object thereof is to automate the assembly process of the seal ring in order to reduce human work while maintaining or improving the assembly quality of such a seal ring. .

  (1) Steps (for example, first step 11a and second step 11b described later) in which a step is formed at least in the radial direction in the joint (for example, joint 10 described later) and the inner diameter side protrudes from the outer diameter side (for example, first step 11a and second step 11b described later). The other end portion (e.g., the third step 13 described later) with the outer diameter side projecting from the inner diameter side with respect to one end portion (e.g., one end portion 20 described later) having This is a device for assembling a seal ring (for example, a seal ring S1 described later) with the other end 30 (described later) overlapping from the outside, and holding the seal ring in a diameter-expanded state than the original shape (for example, A ring guide (for example, a cam-shaped portion 4c described later) that guides to a mounting groove 100 described later, and the ring guide has an inner diameter of the one end portion of the seal ring larger than the other end portion in a cross-sectional view. Hold to the side and front When the seal ring is moved to the mounting groove along the ring guide when mounting the seal ring in the mounting groove, the one end of the seal ring is moved by the restoring force to the original shape of the seal ring. An assembly apparatus for a seal ring, characterized by having a contour that leads to the mounting groove before the other end.

According to the invention of (1), when the seal ring is mounted in the mounting groove, if the seal ring is moved to the mounting groove along the ring guide, the restoring force to the original shape of the seal ring is exhibited. At this time, the contour of the ring guide holding the seal ring was such that one end of the seal ring was held closer to the inner diameter side than the other end in a cross-sectional view. Is shorter than the distance between the other end and the mounting groove, and one end of the seal ring can be guided to the mounting groove before the other end by the restoring force to the original shape of the seal ring.
In this way, assembling of the seal ring is performed by shifting the mounting timing of both ends of the seal ring using the restoring force of the seal ring held in the ring guide to the original shape. The assembly process of the seal ring can be realized. Therefore, it is possible to automate the assembly process of the seal ring so as to reduce the number of man-hours while maintaining or improving the assembly quality of the seal ring.

  (2) When the seal ring is mounted in the mounting groove, a ring moving means (for example, a ring push-in member 5 described later) for moving the seal ring held by the ring guide along the ring guide is further provided. The sealing ring assembling device according to (1), characterized in that it is provided.

  According to the invention of (2), when the seal ring is mounted in the mounting groove, the ring moving means moves the seal ring held by the ring guide along the ring guide. Thus, the ring moving means moves the seal ring along the ring guide to the mounting groove, so that a simple automated seal ring assembling process can be realized without the need for manual work.

  (3) Steps (for example, first step 11a and second step 11b described later) in which a step is formed at least in the radial direction at the joint (for example, joint 10 described later) and the inner diameter side protrudes from the outer diameter side (for example, first step 11a and second step 11b described later). The other end portion (e.g., the third step 13 described later) with the outer diameter side projecting from the inner diameter side with respect to one end portion (e.g., one end portion 20 described later) having This is a method of assembling a seal ring (for example, a seal ring S1 described later) with the other end 30 (described later) overlapping from the outside, and holding the seal ring in a diameter-expanded state than the original shape (for example, A ring guide (for example, a cam-shaped portion 4c described later) for guiding to a mounting groove 100 described later, and holds one end portion of the seal ring closer to the inner diameter side than the other end portion in a cross-sectional view. Ringer with contour A step of holding the seal ring on the door (for example, ST3 to be described later), and moving the seal ring along the ring guide to the mounting groove to restore the seal ring to its original shape. A step of guiding the one end portion into the mounting groove before the other end portion and mounting the seal ring in the mounting groove (for example, ST4 described later). Assembling method of seal ring.

  According to the invention of (3), there are the same operations and effects as the invention of (1).

  ADVANTAGE OF THE INVENTION According to this invention, the assembly process of a seal ring can be automated in order to reduce a man work, maintaining or improving the assembly quality of a seal ring.

It is a figure which shows schematic structure of the seal ring assembly | attachment apparatus which concerns on embodiment of this invention. It is a figure which shows schematic structure of the seal ring assembly apparatus which concerns on the said embodiment. It is a figure which shows schematic structure of the seal ring assembly apparatus which concerns on the said embodiment. It is a figure which shows schematic structure of the seal ring assembly apparatus which concerns on the said embodiment. It is a figure which shows schematic structure of the seal ring assembly apparatus which concerns on the said embodiment. It is a figure which shows the seal ring which concerns on the said embodiment. It is a perspective view which shows the cam shape guide which concerns on the said embodiment. It is a top view which shows the state in which the restoring force to the original shape of the seal ring which concerns on the said embodiment is exhibited by one edge part side. It is a top view which shows the state by which the restoring force to the original shape of the seal ring which concerns on the said embodiment is exhibited by the other edge part side. It is a figure which shows the operation state of the nail | claw presser concerning the said embodiment. It is a figure which shows the operation state of the nail | claw presser concerning the said embodiment. It is a figure which shows the operation state of the nail | claw presser concerning the said embodiment. It is a figure which shows the operation state of the nail | claw presser concerning the said embodiment. It is a flowchart which shows the procedure of the seal ring assembly | attachment apparatus which concerns on the said embodiment.

  A seal ring assembling apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 thru | or FIG. 5 is a figure which shows schematic structure of the seal ring assembly apparatus 1 which concerns on this embodiment.
The seal ring assembling apparatus 1 shown in FIGS. 1 to 5 takes out one of a plurality of seal rings Sn filled in the stocker 2 and attaches the removed seal ring S1 to the installation groove 100 of the piston P. The piston P to which the seal ring S1 is attached is held by the press-fitting guide 7.

The seal ring S is mounted in a mounting groove 100 formed on the outer peripheral surface of the maximum diameter portion of the bottomed conical piston P used for the CVT movable pulley.
FIG. 6 is a view showing the seal ring S according to the present embodiment. As shown in FIG. 6, the seal ring S assembled to the piston P is called a W cut, and is formed with radial steps 11 a, 11 b, 13 and wall portions 12, 14 in the width direction at the joint 10. It is a thing.
One end portion 20 of the seal ring S has an inner diameter side protruding from the outer diameter side, a distal end surface 20a on the inner diameter side, a first step 11a that is retracted from the distal end surface 20a on the outer diameter side, and further retracted. A second step 11b is provided. The first step 11 a and the second step 11 b are positioned side by side in the width direction of the seal ring S, and the first step 11 a and the second step 11 b are connected by the wall portion 12. The protruding inner diameter side (tip surface 20a) and the retracted outer diameter side (first step 11a, second step 11b) at one end 20 of the seal ring S are connected by a wall 20b. .
The other end portion 30 of the seal ring S has an outer diameter side projecting from the inner diameter side, a distal end surface 30a on the outer diameter side and a wall portion 15 that is recessed from the distal end surface 30a, and an inner diameter side than the wall portion 15. It has a third step 13 that is retracted. The front end surface 30 a and the wall 15 are located side by side in the width direction of the seal ring S, and the front end surface 30 a and the wall 15 are connected by the wall 14. The protruding outer diameter side (tip surface 30a, wall 15) and the retracted inner diameter side (third step 13) at the other end 30 of the seal ring S are connected by a wall 30b.
In the mounted state, the seal ring S has an end portion 20 positioned on the inner side and the other end portion 30 positioned on the outer side overlapping from the outer side, the wall portion 30b is in contact with the wall portion 20b, and the distal end surface 20a. Is in contact with the third step 13, the first step 11a is in contact with the wall 15, the second step 11b is in contact with the distal end surface 30a, and the smooth surfaces of the respective portions are brought into close contact with each other, thereby exhibiting sealing performance. .
In addition, the seal ring S is in a diameter-expanded state in the natural state, and has a gap between the one end 20 and the other end 30.

The seal ring assembling apparatus 1 includes a stocker 2, a single take-out arm 3, a cam-shaped guide 4, a ring pushing member 5, a claw presser 6, and a press-fit guide 7.
In the seal ring assembling apparatus 1, a cam-shaped guide 4 is connected under the stocker 2, and a press-fitting guide 7 is disposed under the cam-shaped guide 4. Between the cam-shaped guide 4 and the press-fitting guide 7, the piston P to which the seal ring S <b> 1 is assembled is arranged with the mounting groove 100 exposed.

  The stocker 2 holds the plurality of seal rings S1 on the body portion 2a so as to be annular in the horizontal plane direction in a state in which the positions of the joints 10 of the plurality of seal rings Sn are aligned and the phases are adjusted. The trunk portion 2a of the stocker 2 has a trunk length larger than the circumferential length of the seal ring Sn, and holds the seal ring Sn in a diameter-expanded state than the original shape. For this reason, the plurality of seal rings S1 held on the body portion 2a of the stocker 2 can maintain the held state even when the stocker 2 moves.

One take-out arm 3 hooks one seal ring S1 located at the lowermost position among the plurality of seal rings Sn held by the body part 2a of the stocker 2 with an arm directed from the four directions toward the body part 2a. Pull it down to the cam-shaped guide 4 (see FIG. 1). At this time, the single take-out arm 3 does not shift the phase of the joint 10 of the seal ring S1.
The single take-out arm 3 does not have to be an arm from the four directions toward the body portion 2a, but may be an arm from more directions toward the body portion 2a.

FIG. 7 is a perspective view showing the cam shape guide 4 according to the present embodiment. As shown in FIG. 7, the cam-shaped guide 4 includes a small diameter portion 4a having an upper portion connected to the stocker 2 having a smaller diameter than the stocker 2 and a tapered portion 4b that is connected to the lower portion of the small diameter portion 4a and gradually increases in diameter. And a cam-shaped portion 4c that guides the seal ring S1 while maintaining the maximum diameter of the tapered portion 4b that is larger than the original shape of the seal ring S1.
Here, the small-diameter portion 4a, the tapered portion 4b, and the cam-shaped portion 4c of the cam-shaped guide 4 have a step 4d at the position of the joint 10 of the seal ring S1 that has been pulled down from the stocker 2 and has no phase shift. That is, the shape of the cam-shaped guide 4 has a contour that holds one end 20 of the seal ring S1 closer to the inner diameter side than the other end 30 in a sectional view. In other words, the contour of the cam-shaped guide 4 in cross-sectional view is a combination of two arcs with different radii of curvature, and the side that guides one end 20 of the seal ring S1 is more than the side that guides the other end 30 It has a small radius of curvature.
In the cam-shaped guide 4, the step 4d at the position of the abutment 10 of the seal ring S1 increases in the order toward the small-diameter portion 4a, the tapered portion 4b, and the cam-shaped portion 4c.
The largest step 4d of the cam-shaped portion 4c has a predetermined size. For example, the seal ring S1 that has fallen from the cam-shaped portion 4c is restored to its original shape, and one end 20 of the seal ring S1 is restored. Has a size that can be guided to the mounting groove 100 of the piston P before the other end 30.

The ring push-in member 5 can be divided into two members. When combined, the ring push-in member 5 has a hole in which two arcs having different curvature radii that are slightly larger than the outer peripheral diameter of the cam-shaped portion 4c of the cam-shaped guide 4 are combined. It is a flat ring-shaped member.
When the seal ring S1 is pulled down to the cam-shaped guide 4 by the single take-out arm 3, the ring push-in member 5 starts from the state where it is divided into two in advance and waits at the position of the small-diameter portion 4a of the cam-shaped guide 4. The hole portion is coupled in a ring shape through which the small diameter portion 4a is inserted (see FIG. 2).
The seal ring S1 pulled down to the cam-shaped guide 4 by the single take-out arm 3 is pushed down to the cam-shaped portion 4c of the cam-shaped guide 4 by the coupled ring pushing member 5 (see FIG. 3). Thereby, the seal ring S1 is held in the cam shape portion 4c of the cam shape guide 4 in a diameter-expanded state than the original shape.
Then, the ring pushing member 5 in the coupled state further follows the surface perpendicular to the axial direction of the seal ring assembling apparatus 1 and the seal ring S1 along the cam-shaped portion 4c of the cam-shaped guide 4 along the mounting groove 100 of the piston P. The entire seal ring S1 is dropped into the mounting groove 100 of the piston P at the same time (see FIG. 4).

  Here, the lower end of the cam-shaped portion 4c of the cam-shaped guide 4 and the upper end of the press-fitting guide 7 sandwich the piston P with the mounting groove 100 exposed in the vertical direction. The copying guide surface 50 is formed by being inclined in the 100 direction. The copying guide surface 50 stabilizes the posture when the seal ring S1 is mounted when moving to the mounting groove 100 of the piston P.

When the seal pushing ring 5 moves the seal ring S1 along the cam-shaped portion 4c of the cam-shaped guide 4 to the mounting groove 100 of the piston P, the groove bottom diameter of the mounting groove 100 of the piston P is smaller than that of the cam-shaped portion 4c. Therefore, the restoring force to the original shape of the seal ring S1 falling in the mounting groove 100 is exhibited.
FIG. 8 is a top view showing a state in which the restoring force to the original shape of the seal ring S1 according to the present embodiment is exerted on one end 20 side. FIG. 9 is a top view showing a state in which the restoring force to the original shape of the seal ring S1 according to the present embodiment is exerted on the other end 30 side.
When the restoring force to the original shape of the seal ring S1 is exerted, the contour of the cam-shaped portion 4c of the cam-shaped guide 4 that has held the seal ring S1 is shown as one end portion 20 of the seal ring S1 in a sectional view. Since the distance between the one end portion 20 and the mounting groove 100 is shorter than the distance between the other end portion 30 and the mounting groove 100 because the inner end side of the seal ring S1 is held. One end 20 of the seal ring S1 is guided into the mounting groove 100 before the other end 30 by the restoring force to the shape.
That is, with the restoring force to the original shape of the seal ring S1, one end 20 of the seal ring S1 is first guided to the mounting groove 100 as shown in FIG. 8, and then the mounting timing is slightly shifted in FIG. As shown, the other end 30 is guided into the mounting groove 100. Thus, in the seal ring S1, the other end 30 that should be located on the outside overlaps with the one end 20 that should be located on the inside, and the abutment 10 can be reliably configured at both ends 20 and 30.
That is, since the groove bottom circumferential length of the mounting groove 100 and the circumferential length of the seal ring S1 substantially coincide with each other, the seal ring S1 has the wall portion 30b in contact with the wall portion 20b and the tip end surface 20a having the third end surface 20a. The first step 11a hits the wall 15 and the second step 11b hits the tip surface 30a.

Note that the ring push-in member 5 is a flat plate when the mounting force shifts the one end 20 of the seal ring S1 to the mounting groove 100 before the other end 30 by the restoring force to the original shape of the seal ring S1. Since it is ring-shaped and the timing of dropping the seal ring S1 into the mounting groove 100 of the piston P is the same for the entire seal ring S1, the one end 20 located on the cam-shaped portion 4c and the other end 30 are This is a shift of a few seconds depending on the distance to each mounting groove 100.
Further, since the timing when the seal ring S1 is dropped into the mounting groove 100 of the piston P is the same timing for the entire seal ring S1, the seal ring S1 is restored to its original shape from the expanded state at the moment of dropping, but the seal ring S1 is twisted or has both ends. The seal ring S1 is mounted in the mounting groove 100 with a stable shape that is not twisted, without causing any axial displacement between 20 and 30.
Thus, the restoring force of the seal ring S1 to the original shape is exhibited, and the seal ring S1 is mounted in the mounting groove 100 of the piston P sandwiched between the cam-shaped guide 4 and the press-fitting guide 7.

The claw retainers 6a, 6b, 6c, 6d are arranged at predetermined heights in four directions at height positions where the mounting groove 100 of the piston P is exposed, and are mounted on the mounting groove 100 formed on the outer peripheral surface of the piston P. The four finger members directly press the positions of the different outer peripheral surfaces of the seal ring S1 inward to the groove bottom side of the mounting groove 100 of the piston P.
The restoring force to the original shape of the seal ring S1 is exerted, and the seal ring S1 is mounted in the mounting groove 100. However, the sealing ring S1 has a weak restoring force to the original shape, and the mounting groove 100 of the piston P is weak. For example, the two end portions 20, 30 constituting the joint 10 may protrude from the mounting groove 100. When the seal ring S1 protrudes from the mounting groove 100, when the seal ring S1 mounted in the mounting groove 100 is press-fitted into the press-fitting guide 7, problems such as breakage may occur in the seal ring S1.
For this reason, when the seal ring S1 is press-fitted into the press-fitting guide 7, the four claw retainers 6a, 6b, 6c and 6d are pressed so that the seal ring S1 is mounted without protruding into the mounting groove 100.
FIG. 10 thru | or FIG. 13 is a figure which shows the action | operation state of the nail | claw presser 6a, 6b, 6c, 6d which concerns on this embodiment. The four claw retainers 6a, 6b, 6c, 6d are first pressed by the claw retainers 6a that press the intermediate portions between both end portions 20, 30 constituting the joint 10 in the seal ring S1, as shown in FIG. Start. Next, as shown in FIG. 11, after pressing by the claw press 6b that presses one end 20 side of the seal ring S1, the claw press 6c that presses the other end 30 side as shown in FIG. Press. And finally, as shown in FIG. 13, it presses with the nail | claw presser 6d which presses the abutment 10, and the press state of the seal ring S1 whole is maintained with the four nail | claw pressers 6a, 6b, 6c, 6d.

  That is, before inserting the piston P into the press-fitting guide 7, the four claw retainers 6 a, 6 b, 6 c, 6 d press the seal ring S 1 from an intermediate portion between both end portions 20, 30 constituting the joint 10. Then, after pressing one end 20 side, the other end 30 side is pressed, and finally the joint 10 is pressed. Since the four claw retainers 6a, 6b, 6c, and 6d press each part of the seal ring S1 in the above order, the seal ring S1 is in a correct state in which the other end 30 is overlapped with one end 20 from the outside. Thus, the entire seal ring S1 is accommodated without protruding into the mounting groove 100 of the piston P.

The press-fitting guide 7 is a cylindrical member, the inner peripheral diameter of the inner portion 7a is substantially the same as the outer peripheral diameter of the piston P, and the inner peripheral diameter of the tapered portion 7b on the cam-shaped guide 4 side is slightly larger than that. Is also a large diameter.
The piston P before the seal ring S1 is assembled is placed on the press-fit guide 7 in a state where a part of the piston P is embedded in the tapered portion 7b and the mounting groove 100 is exposed on the upper part of the press-fit guide 7. The piston P is assembled with the seal ring S1 in this state (see FIGS. 1 to 3).
Thereafter, when the piston P is placed on the press-fitting guide 7, the seal ring S1 is assembled to the piston P, and the entire seal ring S1 is maintained in the pressed state by the four claw retainers 6a, 6b, 6c, 6d. (See FIG. 4) The rod-like press-fitting member 8 held in the internal space of the stocker 2 and the cam-shaped guide 4 presses the piston P downward toward the press-fitting guide 7 (see FIG. 5).

The piston P whose entire seal ring S1 is maintained in the pressed state by the four claw retainers 6a, 6b, 6c, and 6d by the press of the press-fitting member 8 passes through the taper portion 7b of the press-fit guide 7 and enters the inside of the press-fit guide 7. 7a is press-fitted.
As described above, the piston P to which the seal ring S1 is attached is held by the press-fitting guide 7.

When the piston P is held by the press-fitting guide 7, the press-fitting guide 7 into which the piston P is press-fitted is removed from the seal ring assembling device 1 and supplied to the assembly device for the CVT movable pulley.
On the other hand, a new piston P and a press-fitting guide 7 are supplied to the seal ring assembling apparatus 1 to prepare for the next assembly process of the seal ring S1.

  FIG. 14 is a flowchart showing a procedure of the seal ring assembling apparatus 1 according to this embodiment. Below, with reference to FIG. 14, the procedure of the seal ring assembling apparatus 1 is demonstrated.

  As shown in FIG. 1, in the seal ring assembling apparatus 1, first, one take-out arm 3 is one of the plurality of seal rings Sn held by the body portion 2 a of the stocker 2 and located at the lowest position. The seal ring S1 is hooked by the arm from the four directions toward the body portion 2a and pulled down to the cam-shaped guide 4 (ST1).

  Next, when one seal ring S1 is pulled down to the cam-shaped guide 4 by the single take-out arm 3, as shown in FIG. At the position of the small diameter portion 4a of the guide 4, it is coupled in a ring shape through which the small diameter portion 4a is inserted (ST2).

  When the ring pushing member 5 is coupled in a ring shape, as shown in FIG. 3, the coupled ring pushing member 5 causes the seal ring S1 hooked on the tapered portion 4b of the lower cam shaped guide 4 to be connected to the cam shaped portion 4c. Press down. Accordingly, the seal ring S1 is held in the cam shape portion 4c of the cam shape guide 4 in a diameter-expanded state than the original shape (ST3).

  As shown in FIG. 4, the ring push-in member 5 in the coupled state further follows the surface perpendicular to the axial direction of the seal ring assembling apparatus 1 along the cam-shaped portion 4 c of the cam-shaped guide 4 along the seal ring S 1. The piston P is moved to the mounting groove 100, and the entire seal ring S1 is dropped into the piston P mounting groove 100 at the same timing (ST4).

  When the seal ring S1 is moved to the mounting groove 100 of the piston P along the cam-shaped portion 4c of the cam-shaped guide 4 by the ring pushing member 5, the position of the mounting groove 100 of the piston P is smaller than that of the cam-shaped portion 4c. The restoring force to the original shape of the seal ring S1 falling in the mounting groove 100 is exhibited. That is, since the contour of the cam-shaped portion 4c is holding the one end portion 20 of the seal ring S1 closer to the inner diameter side than the other end portion 30 in a sectional view, the restoring force to the original shape of the seal ring S1 As shown in FIG. 8, one end 20 of the seal ring S1 is first guided to the mounting groove 100, and then the mounting timing is slightly shifted and the other end 30 is guided to the mounting groove 100 as shown in FIG. Is done.

  Next, the four claw retainers 6a, 6b, 6c, and 6d are first pressed by the claw retainers 6a that press the intermediate portions between both end portions 20 and 30 constituting the joint 10 in the seal ring S1, as shown in FIG. Pressing is started (ST5-1). Next, as shown in FIG. 11, after pressing by the claw presser 6b that presses one end 20 side of the seal ring S1 (ST5-2), the other end 30 side is pressed as shown in FIG. The claw presser 6c is pressed (ST5-3). And finally, as shown in FIG. 13, it presses with the nail | claw presser 6d which presses the joint 10 (ST5-4), and maintains the press state of the seal ring S1 whole with the four nail | claw pressers 6a, 6b, 6c, 6d. .

  As shown in FIG. 13, when the entire seal ring S1 is maintained in the pressed state by the four claw retainers 6a, 6b, 6c, 6d, the press-fitting member 8 directs the piston P toward the press-fitting guide 7 as shown in FIG. Then, the piston P is pressed into the inside 7a of the press-fitting guide 7 and held (ST6).

  Then, the press-fitting guide 7 into which the piston P is press-fitted is removed from the seal ring assembly device 1 and supplied to the assembly device for the CVT movable pulley, and a new piston P and the press-fitting guide 7 are supplied to the seal ring assembly device 1. Then, preparation is made so that the next assembly process of the seal ring S1 can be performed (ST7).

According to the seal ring assembling apparatus 1 according to the above embodiment, the following effects are obtained.
(1) When the seal ring S1 is mounted in the mounting groove 100, when the seal ring S1 is moved along the cam-shaped portion 4c to the mounting groove 100, a restoring force to the original shape of the seal ring S1 is exhibited. At this time, the contour of the cam-shaped portion 4c holding the seal ring S1 is that one end portion 20 of the seal ring S1 is held closer to the inner diameter side than the other end portion 30 in a sectional view. The distance between the end portion 20 and the mounting groove 100 is shorter than the distance between the other end portion 30 and the mounting groove 100, and the one end portion 20 of the seal ring S 1 is moved to the other shape by the restoring force to the original shape of the seal ring S 1. It can be guided to the mounting groove 100 before the end 30.
In this way, the seal ring S1 is assembled by shifting the mounting timing of the both end portions 20 and 30 of the seal ring S1 by utilizing the restoring force of the seal ring S1 held in the cam-shaped portion 4c to the original shape. Therefore, a simple automated assembly process of the seal ring S1 can be realized. Therefore, it is possible to automate the assembly process of the seal ring S1 in order to reduce human work while maintaining or improving the assembly quality of the seal ring S1.

  (2) When mounting the seal ring S1 in the mounting groove 100, the ring pushing member 5 moves the seal ring S1 held by the cam-shaped portion 4c along the cam-shaped portion 4c. Thereby, since the seal ring S1 is moved to the mounting groove 100 along the cam-shaped portion 4c by the ring push-in member 5, a simple automated assembly process of the seal ring S1 can be realized without requiring any manual work.

Note that the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the scope of the present invention.
In the above embodiment, the profile of the cam-shaped guide 4 in a sectional view is a combination of two arcs having different radii of curvature, and the side that guides one end 20 of the seal ring S1 is the side that guides the other end 30 It has a smaller radius of curvature. However, it is not limited to this. The shape of the cam-shaped guide 4 only needs to have a contour that holds one end 20 of the seal ring S1 closer to the inner diameter side than the other end 30 in a sectional view. For example, the shape of the cam-shaped guide 4 may be a contour or the like in which only the other end 30 protrudes toward the outer diameter side in a cross-sectional view.
The above embodiment is not only an embodiment of the seal ring assembly apparatus of the present invention, but also an embodiment of the seal ring assembly method of the present invention.

1 ... Seal ring assembly device (Seal ring assembly device)
DESCRIPTION OF SYMBOLS 2 ... Stocker 2a ... Body part 3 ... One taking-out arm 4 ... Cam shape guide 4a ... Small diameter part 4b ... Tapered part 4c ... Cam shape part (ring guide)
4d ... Step 5 ... Ring pushing member (ring moving means)
6a, 6b, 6c, 6d ... Claw holder 7 ... Press fit guide 7a ... Inside 7b ... Tapered portion 8 ... Press fit member 10 ... Abutment 11a ... First step 11b ... Second step 12 ... Wall portion 13 ... Third step DESCRIPTION OF SYMBOLS 14 ... Wall part 15 ... Wall part 20 ... One end part 20a ... Front end surface 20b ... Wall part 30 ... The other end part 30a ... Front end surface 30b ... Wall part 50 ... Copying guide surface 100 ... Mounting groove S1, Sn ... Seal Ring P ... Piston

Claims (3)

At the joint, a step is formed at least in the radial direction, and the other end having a step protruding from the inner diameter side from the outer diameter side is opposed to the one end having the step protruding from the outer diameter side from the outer diameter side. A device for assembling overlapping seal rings,
A ring guide that holds the seal ring in a diameter-expanded state than the original shape and guides it to the mounting groove,
The ring guide holds the one end portion of the seal ring closer to the inner diameter side than the other end portion in a cross-sectional view, and when the seal ring is attached to the attachment groove, the seal ring is attached to the ring guide. The contour of guiding one end of the seal ring to the mounting groove before the other end by a restoring force to the original shape of the seal ring when moved to the mounting groove along An assembly device for a seal ring, comprising:   The ring moving means for moving the seal ring held by the ring guide along the ring guide when the seal ring is mounted in the mounting groove. Seal ring assembly device. At the joint, a step is formed at least in the radial direction, and the other end having a step protruding from the inner diameter side from the outer diameter side is opposed to the one end having the step protruding from the outer diameter side from the outer diameter side. A method of assembling overlapping seal rings,
A ring guide that holds the seal ring in a larger diameter than the original shape and guides the seal ring in a mounting groove, and holds one end of the seal ring closer to the inner diameter than the other end in a cross-sectional view. Holding the seal ring in a ring guide having a contour to:
The seal ring is moved along the ring guide to the mounting groove, and the one end of the seal ring is moved ahead of the other end by the restoring force to the original shape of the seal ring. And mounting the seal ring in the mounting groove.

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