JP2013144332A - Apparatus and method for inserting workpiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automate a process of inserting a workpiece with a seal ring assembled thereon into an opening member for reducing manual work, while maintaining or improving assembly quality of the seal ring.SOLUTION: An apparatus for inserting a workpiece includes claw pressers 6a, 6b, 6c, 6d pressing a seal ring S1 inward to a groove bottom side of a mounting groove 100 formed on an outer circumferential surface of a piston P before inserting the piston P into a press fitting guide 7. The claw pressers 6a, 6b, 6c, 6d starts the pressing of the seal ring S1 from an intermediate part between both end parts 20, 30 constituting an abutment joint 10, then presses one end part 20 side to be positioned below, and performs the pressing up to the other end part 30 side to be positioned above.

Description

  The present invention relates to a workpiece insertion device and a workpiece insertion 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 protrudes from the outer diameter side. The present invention relates to a workpiece insertion device and a workpiece insertion method for inserting a workpiece in which a seal ring overlapping from the outside into a mounting groove is inserted into an opening member.

  Conventionally, the lid-like work (piston) has been inserted into the opening member (press-fit guide) by the operator's manual work with the seal ring assembled. Then, the opening member into which the lid-like work is inserted is placed on the opening of the saddle-like work such as a CVT movable pulley by the operator's manual work, and the saddle-like work is pressed using a press-fitting machine. The lid-shaped workpiece was press-fitted into the cylindrical workpiece, and the bowl-shaped workpiece was assembled.

  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 process of inserting the lid-shaped workpiece into the opening member.
For example, Patent Literature 1 discloses a press-fit assembly device that performs press-in of components and assembly of a retaining ring simultaneously in a single device and in one process.
Further, 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 with a simple configuration.

JP-A-11-170125 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.
Such a seal ring has a weak restoring force to its original shape and cannot maintain the state where it is mounted in the mounting groove of the lid-like workpiece. For example, both ends constituting the joint protrude from the mounting groove. There was a case. In a state where both ends of the seal ring protrude from the mounting groove, the seal ring may be damaged, and it is difficult to insert the lid-like work into which the seal ring is assembled into the opening member. For this reason, it has been considered difficult to automate the process of inserting the lid-like workpiece into which the seal ring is assembled into the opening member.

  The present invention solves the above-mentioned problems, and its object is to insert a work into which the seal ring is assembled into an opening member so as to reduce human work while maintaining or improving the assembly quality of such a seal ring. The purpose is to automate the process.

  (1) Steps (for example, first step 11a, second step 11b, and fourth step 13 described later) are formed at least in the radial direction at the joint (for example, joint 10 described later), and the inner diameter side is the outer diameter. For one end (for example, one end 20 described later) having a step protruding from the side (for example, first step 11a and second step 11b described later), the outer diameter side is more than the inner diameter side. A seal ring (for example, a seal ring S1 to be described later) having a protruding step (for example, a third step 13 to be described later) with an other end (for example, the other end 30 to be described later) overlapped from the outside is attached to a mounting groove ( For example, a workpiece insertion device (for example, a seal ring assembly device 1 to be described later) for inserting a workpiece (for example, a piston P to be described later) assembled in a mounting groove 100 (to be described later) into an opening member (for example, a press-fit guide 7 to be described later). ) Before inserting the seal into the opening member, a pressing mechanism that presses the seal ring inwardly toward the bottom of the mounting groove formed on the outer peripheral surface of the work (for example, claw pressers 6a, 6b, which will be described later) 6c, 6d, two roller members 40a, 40b, fluid ejecting means 60), and the pressing mechanism starts pressing the seal ring from an intermediate portion between both ends constituting the joint (for example, ST5-1, which will be described later, and then the one end side is pressed (for example, ST5-2, which will be described later), and then the other end side is pressed (for example, ST5-3, which will be described later). A workpiece insertion device characterized by that.

According to the invention of (1), before the workpiece is inserted into the opening member, the pressing mechanism starts pressing the seal ring from an intermediate portion between both end portions constituting the joint, and then one end portion. After pressing the side, the other end side is pressed. In this way, the pressing mechanism presses each part of the seal ring in the above order, so that the seal ring is in a correct state where one end overlaps the other end from the outside, and the entire seal ring is in the workpiece mounting groove. It is accommodated without protruding.
As a result, when the entire seal ring is accommodated by the pressing mechanism without protruding into the mounting groove of the workpiece, the workpiece can be inserted into the opening member in that state, so there is no need for human work and a simple automated workpiece. It is possible to realize an insertion process into the opening member. Therefore, it is possible to automate the process of inserting the workpiece into which the seal ring is assembled into the opening member so as to reduce the number of man-hours while maintaining or improving the assembly quality of the seal ring.

  (2) The pressing mechanism includes a plurality of finger members (for example, claws described later) that directly press the different positions of the seal ring inward to the groove bottom side of the mounting groove formed on the outer peripheral surface of the workpiece. The plurality of finger members are started to be pressed by a finger member (for example, a claw presser 6a to be described later) that presses the intermediate portion of the seal ring, and then the presser members 6a, 6b, 6c, 6d) A finger member that presses the one end side of the seal ring (for example, a claw presser 6b described later) and then presses the other end side (for example, a claw presser 6c described later). The workpiece insertion device according to (1), wherein the workpiece insertion device is pressed by the following.

  According to the invention of (2), since the plurality of finger members press each part of the seal ring in the above order, the seal ring is in a correct state in which the other end overlaps with one end from the outside. Is accommodated without protruding into the mounting groove of the workpiece.

  (3) The pressing mechanism includes two roller members (for example, two roller members described later) that directly press the seal ring inwardly toward the groove bottom side of the mounting groove formed on the outer peripheral surface of the workpiece. 40a, 40b), and one of the two roller members (for example, roller member 40a described later) starts pressing at the intermediate portion of the seal ring and presses toward the one end side. (1), wherein the position where the other roller member (for example, roller member 40b described later) presses toward the other end of the seal ring is moved after the position to be moved is moved. Work insertion device.

  According to the invention of (3), since the two roller members press each part of the seal ring in the above order, the seal ring is in a correct state where one end overlaps the other end from the outside. Is accommodated without protruding into the mounting groove of the workpiece.

  (4) The pressing mechanism presses a different position of the seal ring inward toward the groove bottom side of the mounting groove formed on the outer peripheral surface of the workpiece by ejecting fluid toward the seal ring. The work insertion device according to (1), including a plurality of fluid ejecting units (for example, a plurality of fluid ejecting units 60 described later).

  According to the invention of (4), the plurality of fluid ejecting means start pressing the seal ring from an intermediate portion between both ends constituting the joint, and then press one end side, It is possible to press up to the other end side. In this way, the plurality of fluid ejecting means press each part of the seal ring in the above order, so that the seal ring is in a correct state where one end overlaps the other end from the outside, and the entire seal ring is the workpiece. It is accommodated without protruding into the mounting groove.

  (5) Steps (for example, first step 11a, second step 11b, and fourth step 13 described later) are formed at least in the radial direction at the joint (for example, joint 10 described later), and the inner diameter side is the outer diameter. For one end (for example, one end 20 described later) having a step protruding from the side (for example, first step 11a and second step 11b described later), the outer diameter side is more than the inner diameter side. A seal ring (for example, a seal ring S1 to be described later) having a protruding step (for example, a third step 13 to be described later) with an other end (for example, the other end 30 to be described later) overlapped from the outside is attached to a mounting groove ( For example, a work insertion method for inserting a work (for example, a piston P, which will be described later) assembled in a mounting groove 100, which will be described later, into an opening member (for example, a press-fit guide 7 described later), in which the seal ring is attached to the workpiece. Formed on the outer surface The seal ring is pressed using a pressing mechanism (for example, claw pressers 6a, 6b, 6c, 6d, two roller members 40a, 40b, fluid ejecting means 60, which will be described later) that presses inward toward the bottom of the mounting groove. A pressing step (for example, pressing the one end side from the middle part between both ends constituting the abutment and then pressing the one end side to the other end side (for example, ST5-1, ST5-2, ST5-3, ST5-4, which will be described later, and an inserting step of inserting the workpiece into the opening member (for example, while the entire seal ring is being pressed by the pressing step (for example, , ST6) to be described later.

  According to the invention of (5), there are the same operations and effects as the invention of (1).

  ADVANTAGE OF THE INVENTION According to this invention, the automation of the insertion process to the opening member of the workpiece | work which assembled | attached the seal ring in order to reduce human work can be achieved, 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. It is a figure which shows the operating state of the two roller members which concern on other embodiment of this invention. It is a figure which shows the operating state of the some fluid injection means which concerns on other embodiment of this invention.

  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 located 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 distal end surface 30 a and the wall portion 15 are positioned in the width direction of the seal ring S, and the distal end surface 30 a and the wall portion 15 are connected by the wall portion 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 a sealing property. .
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.

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 timing (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 provided with an intermediate portion between both end portions 20 and 30 constituting the joint 10 in the seal ring S1, as shown in FIG. Pressing is started by the nail presser 6a that presses the central portion that is just equidistant from the both ends 20 and 30 constituting the structure (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) Before inserting the piston P into the press-fitting guide 7, the claw retainers 6 a, 6 b, 6 c, 6 d start pressing 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. Thus, the claw holders 6a, 6b, 6c, 6d press each part of the seal ring S1 in the above order, so that the seal ring S1 is in a correct state in which the other end 30 overlaps 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 pressing is started from an intermediate portion between both end portions 20 and 30 constituting the abutment 10, but this pressing start position is more preferably a center just equidistant from the both end portions 20 and 30 constituting the abutment 10. Good part. It is best to press each part of the seal ring S1 in order from this central part.
Accordingly, when the entire seal ring S1 is accommodated without protruding into the mounting groove 100 of the piston P due to the pressing of the claw retainers 6a, 6b, 6c, 6d, the piston P can be inserted into the press-fit guide 7 in that state. A simple automated process for inserting the piston P into the press-fitting guide 7 can be realized without the need for human work. Therefore, it is possible to automate the process of inserting the piston P into which the seal ring S1 is assembled into the press-fitting guide 7 in order to reduce human work while maintaining or improving the assembly quality of the seal ring S1.

  (2) 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 overlaps one end 20 with the other end 30 from the outside. In the correct state, the entire seal ring S1 is accommodated without protruding into the mounting groove 100 of the piston P.

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.
The above embodiment is not only an embodiment of the workpiece insertion device of the present invention, but also an embodiment of the workpiece insertion method of the present invention.

  In the said embodiment, although the four nail | claw pressers 6a, 6b, 6c, 6d were mentioned as a press mechanism of this invention, it is not restricted to this. For example, if the pressing order of the seal rings is the same as that in the above embodiment, the number of claw pressers is not limited to four.

FIG. 15 is a diagram illustrating an operating state of two roller members 40a and 40b according to another embodiment of the present invention. For example, as a pressing mechanism of the present invention, as shown in FIG. 15, two roller members 40a that directly press the seal ring S1 inwardly toward the groove bottom side of the mounting groove 100 formed on the outer peripheral surface of the piston P. , 40b.
One roller member 40a of the two roller members 40a and 40b shown in FIG. 15 rotates and is at an intermediate portion between both end portions 20 and 30 constituting the joint 10 in the seal ring S1 as shown by an arrow A in the drawing. After the pressing is started and the position of pressing toward the one end 20 is moved, the other roller member 40b rotates and presses toward the other end 30 in the seal ring S1 as shown by the arrow B in the figure. Move the position. As a result, the entire seal ring S1 is pressed.

When the two roller members 40a and 40b shown in FIG. 15 are used, the following effects are obtained.
(3) Since the two roller members 40a and 40b 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 overlaps one end 20 from the outside. The entire seal ring S1 is accommodated without protruding into the mounting groove 100 of the piston P.
The pressing is started from an intermediate portion between both end portions 20 and 30 constituting the abutment 10, but this pressing start position is more preferably a center just equidistant from the both end portions 20 and 30 constituting the abutment 10. Good part. It is best to press each part of the seal ring S1 in order from this central part.
In addition, the pressing start position in the middle between both end portions 20 and 30 constituting the joint 10 is preferably close to one end portion 20 if the moving speed of the roller member is constant. Then, before the roller member 40b reaches the other end portion 30, the roller member 40a reaches the one end portion 20 first.
Moreover, if the pressing start location is substantially the center, the moving speed of the roller member 40a may be faster than the moving speed of the roller member 40b. Then, before the roller member 40b reaches the other end portion 30, the roller member 40a reaches the one end portion 20 first.

FIG. 16 is a view showing an operating state of a plurality of fluid ejecting means 60 according to another embodiment of the present invention. Further, for example, as a pressing mechanism of the present invention, as shown in FIG. 16, by ejecting fluid toward the seal ring S1, different positions of the seal ring S1 are formed in the mounting groove 100 formed on the outer peripheral surface of the piston P. There may be a plurality of fluid ejecting means 60 that press inward toward the groove bottom.
Also in this case, the plurality of fluid ejecting means 60 start pressing the seal ring S1 from the intermediate portion between the both end portions 20 and 30 constituting the joint 10, and then the arrow A shown in the figure. In this way, after pressing one end 20 side by ejecting fluid, the other end 30 side is pressed by ejecting fluid as shown by the arrow B in the figure. Finally, the entire seal ring S1 is pressed by fluid ejection.

When the plurality of fluid ejecting means 60 shown in FIG. 16 are used, the following effects are obtained.
(4) The plurality of fluid ejecting means 60 starts pressing the seal ring S1 from an intermediate portion between both end portions 20 and 30 constituting the joint 10, and then presses one end portion 20 side. To the other end 30 side. As described above, since the plurality of fluid ejecting means 60 press each part of the seal ring S1 in the order described above, the seal ring S1 is in a correct state in which the other end 30 overlaps the one end 20 from the outside. The entire ring S1 is accommodated without protruding into the mounting groove 100 of the piston P.
The pressing is started from an intermediate portion between both end portions 20 and 30 constituting the abutment 10, but this pressing start position is more preferably a center just equidistant from the both end portions 20 and 30 constituting the abutment 10. Good part. It is best to press each part of the seal ring S1 in order from this central part.
Further, for example, a plurality of fluid ejecting means 60 are arranged at equal intervals, and finally, the timing at which the fluid ejecting means closest to the other end 30 among the plurality of fluid ejecting means 60 starts to eject. Before that, it is preferable that the fluid ejecting means closest to the one end portion 20 surely reaches the timing at which ejection starts.

1 ... Seal ring assembly device (work insertion device)
2 ... Stocker 2a ... Body part 3 ... One extraction arm 4 ... Cam-shaped guide 4a ... Small diameter part 4b ... Tapered part 4c ... Cam-shaped part 4d ... Step 5 ... Ring push-in members 6a, 6b, 6c, 6d ... Claw presser ( (Pressing mechanism, finger member)
7 ... Press-fit guide (opening member)
7a ... inner 7b ... tapered portion 8 ... press-fitting member 10 ... abutment 11a ... first step 11b ... second step 12 ... wall portion 13 ... third step 14 ... circumferential cut surface difference 15 ... width direction cut surface 20 ... one end 20a ... tip end surface 20b ... wall 30 ... other end 30a ... tip end 30b ... wall 40a, 40b ... two roller members (pressing mechanism)
50 ... Copying guide surface 60 ... Fluid ejecting means (pressing mechanism)
100 ... Installation groove S1 ... Seal ring P ... Piston (workpiece)

Claims (5)

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 workpiece insertion device for inserting a workpiece in which an overlapping seal ring is assembled into a mounting groove into an opening member,
Before inserting the workpiece into the opening member, a pressing mechanism that presses the seal ring inward to the groove bottom side of the mounting groove formed on the outer peripheral surface of the workpiece,
The pressing mechanism starts pressing the seal ring from an intermediate portion between both ends constituting the joint, and then presses the one end side to the other end side. A workpiece insertion device, wherein the workpiece insertion device is pressed. The pressing mechanism includes a plurality of finger members that directly press the different positions of the seal ring inward to the groove bottom side of the mounting groove formed on the outer peripheral surface of the workpiece,
The plurality of finger members start to be pressed by a finger member that presses the intermediate portion of the seal ring, and then pressed by the finger member that presses the one end side of the seal ring, 2. The workpiece insertion device according to claim 1, wherein the workpiece insertion device is pressed by a finger member that presses the other end side. The pressing mechanism has two roller members that press the seal ring directly inward to the groove bottom side of the mounting groove formed on the outer peripheral surface of the workpiece,
After one roller member of the two roller members starts pressing at the intermediate portion in the seal ring and moves to the one end side, the other roller member moves in the seal ring. The work insertion device according to claim 1, wherein a position to be pressed toward the other end is moved.   The pressing mechanism ejects fluid toward the seal ring, thereby pressing the different positions of the seal ring inward to the groove bottom side of the mounting groove formed on the outer peripheral surface of the workpiece. The work insertion device according to claim 1, further comprising an injection unit. 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 workpiece insertion method for inserting a workpiece in which an overlapping seal ring is assembled into a mounting groove into an opening member,
Using a pressing mechanism that presses the seal ring inward toward the groove bottom side of the mounting groove formed on the outer peripheral surface of the workpiece, the seal ring is moved from an intermediate portion between both ends constituting the joint. A pressing step of starting pressing and then pressing the one end side to the other end side;
An insertion step of inserting the workpiece into the opening member while the whole seal ring is being pressed by the pressing step.

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