JP2003136348A - Snap ring assembling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a snap ring assembling device capable of assembling various kinds of snap rings of different diameters in an assembling groove in a workpiece. SOLUTION: In this snap ring assembling device, plural snap guide jigs 51 are disposed roughly in a circumferential direction. In this snap guide jig 51, a guide surface 51c to hold the snap ring R is formed. These snap guide jigs 51 are driven by a jig diameter expanding mechanism 32 to move in diametric directions. A push-in jig 52 is provided to each snap guide jig 51. The push-in jig 52 is interlocked with diametric move of the snap guide jig 51 to move in the diametric direction, while relatively moving in an axial line direction along the guide surface 51c to the snap guide jig 51. The push-in jig 52 feeds the snap ring R held by the guide surface 51c toward the assembling groove W1 in the workpiece W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring ring assembling device for assembling a spring ring into an assembling groove of a work.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 16, there is known an assembling device for assembling a so-called spring ring in which a joint is formed by cutting a part of a ring so that it can be deformed in a radial direction. . That is, FIG. 16 is a schematic configuration diagram showing an assembling device for assembling the snap ring R as a spring ring into the assembling groove W1 provided around the inner wall surface of the substantially cylindrical work W.

This assembling apparatus has a snap guide jig 91.
And a pushing jig 92. The snap guide jig 91 is formed in a substantially cylindrical shape, and the inner diameter on one side in the axial direction (the lower side in FIG. 16, the work W side when assembled) is set to be substantially equal to the inner diameter of the work W. . On the other hand, the other side (upper side in FIG. 16) of the snap guide jig 91 in the axial direction is expanded by a taper 91a.

The pushing jig 92 has an outer diameter substantially equal to the inner diameter of the work W (snap guide jig 91) and is formed in a substantially cylindrical shape. The snap ring R assembled by this assembling device has an outer diameter slightly larger than the inner diameter of the work W in a state where no load is applied (a state where it is not elastically deformed in the radial direction). At the time of assembling, the work W, the snap guide jig 91, and the pushing jig 92 are arranged on substantially concentric axes.

In assembling the snap ring R, the cut snap ring R is first accommodated on the taper 91a side of the snap guide jig 91. Then, in this state, the snap guide jig 91 is placed on the upper end surface of the work W (in FIG. 16, the snap guide jig 91 is depicted separated for convenience). Then, in this state, the pushing jig 92 is moved in the axial direction to push the snap ring R toward the work W side. At this time, the snap ring R is pushed down in the radial direction along the taper 91a while being snapped.
Move along the inner wall surface of the. Then, the snap ring R is pushed until the outer diameter becomes substantially equal to the inner diameter of the work W, and further moved from the inner wall surface of the snap guide jig 91 along the inner wall surface of the work W.

By such movement, the snap ring R
When it reaches the position of the mounting groove W1 of the work W, the snap ring R spreads in the radial direction by its own elastic force and is mounted in the mounting groove W1.

[0007]

By the way, in such a spring ring assembling apparatus, the snap guide jig 91 and the pushing jig 92 are dedicated for each diameter of each snap ring R, and thus lack versatility. It was That is, the snap guide jig 91 and the pushing jig 92 are individually required for each different diameter of the snap ring R.

An object of the present invention is to provide a spring ring assembling apparatus capable of assembling various spring rings having different diameters into the assembling groove of a work.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 sends a spring ring to an assembling groove provided around a work, and the spring ring is moved in the radial direction. In a spring ring assembling device for assembling the spring ring into the assembling groove by elastic force, a plurality of guide jigs that are arranged substantially along the circumferential direction and that hold the spring ring by a guide surface extending in the axial direction, A first moving mechanism that moves the guide jig in the radial direction, and a first moving mechanism that is engaged with the guide jig, moves in the radial direction in conjunction with the movement of the guide jig in the radial direction, and moves with respect to the guide jig. And a plurality of pushing jigs that relatively move in the axial direction along the guide surface to send the spring ring held by the guide surface to the assembly groove, and the pushing jig with respect to the guide jig. Axial along the guide surface And summarized in that and a second moving mechanism for relatively moving the.

According to a second aspect of the present invention, in the spring ring assembly apparatus according to the first aspect, the first moving mechanism is
A first moving body that is driven to move in the axial direction, a rotating body that is connected to the first moving body and rotates based on movement of the first moving body in the axial direction, and a rotating body that is connected to the rotating body. The gist of the present invention is to include a second moving body fixed to the guide jig that moves in the radial direction based on the rotation of the moving body.

According to a third aspect of the present invention, in the spring ring assembling device according to the second aspect, the radial movement of the guide jig is connected to the rotating body, and the guide jig is moved in the radial direction according to the amount of rotation of the rotating body. The gist is that a detection means for detecting the distance is provided.

According to a fourth aspect of the present invention, in the spring ring assembling apparatus according to any of the first to third aspects, the pushing jig is an axial line formed by an engagement pin fixed to the guide jig. The gist of the present invention is that the guide jig is penetrated in the direction to restrict the relative movement in the radial direction with respect to the guide jig and allows the relative movement in the axial direction.

According to a fifth aspect of the present invention, in the spring ring assembling apparatus according to any of the first to fourth aspects, a first supporting member for supporting the guide jig and the pushing jig, and the first supporting member, A first support member moving mechanism that moves the first support member in the axial direction, a second support member that supports the first support member through the first support member moving mechanism, and a second support member in the axial direction. A second supporting member moving mechanism for moving the second supporting member moving mechanism, the second supporting member moving mechanism being driven to position the second supporting member with respect to a predetermined end surface of the workpiece in the axial direction, and the first supporting member moving mechanism. The guide jig and the guide jig supported by the first support member with respect to the assembly groove formed in the work with reference to the second support member axially positioned with respect to the predetermined end surface of the work. Pushing jig And summarized in that formed by driven for axial positioning.

According to a sixth aspect of the present invention, in the spring ring assembling apparatus according to any of the first to fifth aspects, the guide jig holds the outer peripheral surface of the spring ring between the guide surfaces. On the guide surface of the guide jig, which is arranged corresponding to the abutment of the spring ring, in the radial direction of the spring ring accompanying the radial movement of the guide jig. The gist of the present invention is to provide an engagement piece that shifts both end portions of the abutment from each other in the axial direction by compression.

According to a seventh aspect of the present invention, in the spring ring assembling apparatus according to the sixth aspect, the engagement piece is compressed in the radial direction of the spring ring with the radial movement of the guide jig. A guide surface for regulating the circumferential movement of the one end of the abutment and the other end of the abutment in the axial direction along with the movement of the other end of the abutment in the circumferential direction. The point is to have a face.

(Operation) According to the invention described in claim 1,
The guide jig is moved in the radial direction by the first moving mechanism. Therefore, various spring rings having different diameters can be held by the guide surfaces by moving the guide jig in the radial direction. Further, the pushing jig moves in the radial direction in conjunction with the movement of the guide jig in the radial direction, and also moves relatively in the axial direction along the guide surface with respect to the guide jig by the second moving mechanism. As a result, the spring ring held by the guide surface of the guide jig is sent to the assembly groove by the pushing jig. In this way, various spring rings having different diameters can be held by the guide surfaces of the guide jigs, and can be sent out and assembled into the assembling groove of the work by the pushing jig.

According to the second aspect of the present invention, the guide jig can be moved in the radial direction with a simple structure having a mechanical connection structure including the first moving body, the rotating body, and the second moving body. .

According to the third aspect of the present invention, the detecting means is connected to the rotating body which constitutes the first moving mechanism, and the guide jig is moved in the radial direction according to the amount of rotation of the rotating body. Detect the distance. Therefore, for example, by confirming the radial movement distance of the guide jig when the guide jig or the pushing jig comes into contact with the spring ring assembled in the assembly groove, the assembly confirmation of the spring ring in the assembly groove can be confirmed. it can.

According to the fourth aspect of the present invention, the pushing jig is axially penetrated by the engaging pin fixed to the guide jig and is moved in the radial direction relative to the guide jig. Is restricted and relative movement in the axial direction is allowed. Therefore, the pushing jig moves in the radial direction in conjunction with the guide jig via the engagement pin. Further, the pushing jig moves in the axial direction relative to the guide jig along the guide surface without being restricted by the engaging pin.
As described above, the pushing jig has a very simple structure by engaging with the engaging pin fixed to the guide jig, moves in the radial direction in conjunction with the guide jig, and Relatively moves in the axial direction along the guide surface.

According to the invention of claim 5, the second
By driving the support member moving mechanism, the second support member is axially positioned with respect to the predetermined end surface of the work. The second support member is axially positioned with respect to the predetermined end surface of the work by driving the first support member moving mechanism.
With the support member as a reference, the guide jig and the pushing jig supported by the first support member are axially positioned with respect to the assembling groove formed in the workpiece. By positioning the guide jig and the pushing jig in the axial direction with respect to the assembling grooves formed on various kinds of workpieces having different shapes (positions of the predetermined end surface and the assembling groove) in this way, a substantially constant position is obtained. The spring ring can be sent to the assembly groove of the work and assembled at a moving distance in the axial direction. Therefore, it is possible to prevent the spring ring from being deformed due to an excessive force being applied to the spring ring to be fed out, and from being disengaged before being assembled.

According to the sixth aspect of the invention, on the guide surface of the guide jig arranged in correspondence with the abutment of the spring ring, the diameter of the spring ring due to the radial movement of the guide jig. Engagement pieces are provided that axially offset the opposite ends of the abutment by directional compression. Therefore, when the spring ring is compressed in the radial direction, it is possible to prevent the both ends of the abutment of the spring ring from interfering with each other, which enables smooth compression.

According to the invention described in claim 7, in the radial compression of the spring ring accompanying the radial movement of the guide jig, the circumferential movement of the one side end of the abutment is the regulating surface. Regulated. That is, when the spring ring is compressed in the radial direction, one end of the joint of the spring ring is fixed by the regulation surface, so that the phase of the spring ring is based on the one end of the joint. Is kept constant.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. FIG. 2 is an overall configuration diagram showing a snap ring assembling device for assembling the snap ring R as a spring ring. The vertical direction in FIG. 2 substantially coincides with the vertical direction. As shown in the figure, this snap ring assembling apparatus includes a base unit 10, a first elevating unit 20, and a second elevating unit 30.

As shown in FIG. 3, the base unit 10 includes a substantially plate-shaped base 11 and a first unit lifting air cylinder which constitutes a second support member moving mechanism supported on the base 11. 12 and 12. And
The piston rod 13 of the air cylinder 12 for raising and lowering the first unit penetrates substantially the central portion of the base 11,
The tip end portion protruding toward the lifting unit 20 is connected to the first lifting unit 20. That is, the enlarged diameter portion 13 a is formed on the tip end side of the piston rod 13, and the enlarged diameter portion 13 a is locked by the first elevating unit 20 to be connected.

The first elevating unit 20 includes a first elevating frame 21 as a second supporting member connected to the piston rod 13, and an assembling groove height adjusting servo motor constituting a first supporting member moving mechanism. 22 and a plurality of balance air cylinders 23 forming a first support member moving mechanism.

The first elevating frame 21 includes a substantially plate-shaped first base 24 and a substantially donut plate-shaped work height adjusting base 2.
5 and a columnar column 26 that connects the bases 24 and 25 together to form a housing portion of the first elevating unit 20.

A locking protrusion having an inner diameter substantially equal to the outer diameter of the piston rod 13 (diametrically enlarged portion 13a) and protruding in a substantially cylindrical shape toward the piston rod 13 is provided at a substantially central portion of the first base 24. The portion 24a is provided. A flange protruding toward the inner peripheral side is provided on the tip end side of the locking projection 24a so as to correspond to the base end surface of the expanded diameter portion 13a of the piston rod 13. The first base 24 (first elevating frame 21) is connected to the piston rod 13 by the expanded wall portion 13a of the piston rod 13 being locked by the inner wall surface of the locking projection 24a.

The locking projection 24 of the first base 24 is also provided.
A plurality of fitting holes are formed in the peripheral portion of a, one is a motor fitting hole 24b and the other is a cylinder fitting hole 24c. The first base 24 is supported in such a manner that the assembling groove height adjusting servomotor 22 and the balance air cylinder 23 are fitted in the motor fitting hole 24b and the cylinder fitting hole 24c, respectively. There is. The assembling groove height adjusting servomotor 22 and the balance air cylinder 23 penetrate the base 11 in the axial direction so as not to interfere with the base 11.

A plurality of positioning legs 27 are fastened to the outer periphery of the work height adjusting base 25. As also shown in FIG. 4, the positioning leg 27 projects toward the tip side of the work height adjusting base 25, and the tip surface 27a of the positioning leg 27 positions the first elevating unit 20 in the axial direction. It has become. Specifically, when the snap ring R is assembled, the tip end surface 27a of the positioning leg 27 is brought into contact with, for example, a predetermined end surface of the work W, so that the first elevating frame 21 (first elevating unit 20).
And the work W are set so that the positional relationship in the axial direction is always substantially constant. That is, as shown in FIG.
When the piston rod 13 is projected and retracted in the axial direction, the first
The entire lifting frame 21 (first lifting unit 20) is moved in the vertical direction. At this time, the tip end surface 27a of the positioning leg 27 is brought into contact with the predetermined end surface of the work W, so that the axial positional relationship between the first elevating frame 21 (first elevating unit 20) and the work W is always substantially constant. Is set as follows. This sets a reference position for the work W so as to correspond to the mounting of the snap ring R in the mounting groove W1 arranged at the position (height) in the axial direction that differs for each type of the work W. This is because.

The column 26 has the first base 24.
Also, the work height adjusting bases 25 are connected and fixed. The rotary shaft 28 of the assembly groove height adjusting servomotor 22 is rotatably supported by the work height adjusting base 25. A screw portion 28a that meshes with the second elevating unit 30 is formed on the rotary shaft 28, and the assembly groove height adjusting servomotor 22 is rotated by the rotary shaft 28 (screw portion 28a). The two lifting units 30 are sent out in the axial direction.

On the other hand, the piston rod 29 of the balance air cylinder 23 penetrates the first base 24, and the second end of the piston rod 29 protrudes toward the second lifting unit 30.
It is connected to the lifting unit 30. That is, the enlarged diameter portion 29a is formed on the tip end side of the piston rod 29, and the enlarged diameter portion 29a is locked by the second elevating unit 30 to be connected. And basically, the second lifting unit 3
0 is precisely sent out in the axial direction by the rotation of the rotary shaft 28, and the balance air cylinder 23 makes the piston rod 29 project and retract according to this sending out to balance the load and the height of the mounting groove. The load on the alignment servomotor 22 is reduced.

The second elevating unit 30 has a second elevating frame 31 as a first supporting member connected to the rotary shaft 28 and the piston rod 13, and a jig expanding mechanism 32 constituting a first moving mechanism. And a pushing jig moving mechanism 33 constituting a second moving mechanism, and an attachment confirmation mechanism 34 constituting a detecting means.

The second elevating frame 31 includes a substantially plate-shaped second base 35 and a third base 36, and these bases 35, 36.
The second elevating unit 30 having the columnar column 37, the guide block 38, and the cylinder body 39 that connect the two
Forming the casing part of the.

The second base 35 is provided with a ball screw 35a corresponding to the rotary shaft 28 and meshing with its screw portion 28a. The rotation of the rotation shaft 28 of the second base 35 (second elevating frame 31) is controlled by the ball screw 35a.
It is sent out in the axial direction by being converted into a linear motion via. That is, the second lifting frame 21 with respect to the second
The feed-out distance of the base 35 (the second elevating frame 31) in the axial direction is adjusted by the amount of rotation of the rotary shaft 28.

Further, the second base 35 has a locking projection 35b having an inner diameter substantially equal to the outer diameter of the piston rod 29 (diameter expansion portion 29a) and projecting in a substantially cylindrical shape toward the piston rod 29 side. Is provided. A flange protruding toward the inner peripheral side is provided on the tip end side of the locking projection 35b so as to correspond to the base end surface of the expanded diameter portion 29a of the piston rod 29.
The second base 35 (the second elevating frame 31) is provided with an enlarged wall portion 2 of the piston rod 29 by the inner wall surface of the locking projection 35b.
The piston rod 29 is connected by locking 9a.

The third base 36 is connected to the second base 35 by a column 37, and the guide block 38 provided on the outer periphery of the third base 36 has the first elevating frame 2 attached thereto.
The column 26 of No. 1 is penetrated. Therefore, when the second base 35 (second elevating frame 31) is sent out in the axial direction, the second elevating frame 31 moves integrally in a manner of being guided to the column 26 via the guide block 38. As also shown in FIG. 5, the second base 35 (second
Depending on the axial feeding distance of the elevating frame 31), the axial distance L of the second elevating unit 30 to the first elevating unit 20 (the tip surface 27a of the positioning leg 27) (the position of the assembly groove W1 of the workpiece W). It is adapted to be adjusted.

The cylinder body 39 is fixed to a substantially central portion of the third base 36, and the jig expanding mechanism 32, the pushing jig moving mechanism 33 and the attachment confirming mechanism 34 are used.
It houses a part of

As shown in FIG. 5, the jig expanding mechanism 32 includes a claw expansion switching servo motor 41, a cylinder 42 as a first moving body, a link 43 as a rotating body, and a second body.
A slider 44 as a moving body is provided.

The pawl expansion switching servomotor 41 is mounted on the outer peripheral portion of the third base 36, and a threaded portion is formed on its rotary shaft (not shown). The rotary shaft is provided with a ball screw 45 that meshes with the screw portion. The tip of the ball screw 45 has a third
A taper type slider 46 protruding toward the substantially central portion of the base 36 is fixed. This taper type slider 46
The upper end surface of the taper 46a has a taper 46a that linearly inclines downward toward the tip side (substantially the central portion of the third base 36). Therefore, the tapered slider 46 is sent out in the radial direction by converting the rotation of the rotation shaft of the claw expansion switching servomotor 41 into a linear motion via the ball screw 45. At this time, the vertical distance (height) to the upper end surface of the taper type slider 46 at a predetermined position by the taper 46a.
Is adjusted.

The cylinder 42 is formed in a substantially stepped cylindrical shape, and the second elevating frame 31 (third base 3) is formed.
6 and the cylinder body 39, etc.) so as to be movable in the axial direction (vertical direction). This cylinder 42
A flange 47 protruding outward is provided on the base end side (upper side in FIG. 5) of the cylinder, and a cylinder side taper slider 48 is fastened to the outer peripheral portion of the cylinder 47 so as to face the taper slider 46. There is. The lower end surface of the cylinder side taper type slider 48 is a taper 48a which linearly inclines corresponding to the taper 46a. The cylinder 42 is supported in a state where the taper 48 a of the cylinder side taper slider 48 abuts the taper 46 a of the taper slider 46. Therefore, when the taper type slider 46 is fed in the radial direction by driving the claw expansion switching servomotor 41, the cylinder side taper type slider 48 slides along the taper 46a of the taper type slider 46, so that the cylinder 42 moves in the axial direction. Move (up and down).

An engaging groove 49 for engaging with the link 43 is provided around the tip of the cylinder 42. The link 43 includes the cylinder 42 and the slider 4.
The cylinder body 39 is rotatably supported by the tip end portion of the cylinder body 39 so as to be engaged with the cylinder body 4. More specifically, FIG. 1 (a)
As shown in (b), a plurality of mounting recesses 39a are formed at the tip of the cylinder body 39 so as to open in the radial and axial directions at predetermined angles.
The links 43 are axially supported on the inner wall surfaces of each. The axis of the center of rotation of the link 43 is the cylinder 42.
Are set so as to be substantially orthogonal to the axial direction and the radial direction. The link 43 is provided with a cylinder-side engagement piece 43a, a slider-side engagement piece 43b, and an attachment confirmation engagement piece 43c that extend in the radial direction at intervals of approximately 90 degrees.

Cylinder side engaging piece 43a of the link 43
Are engaged in a manner that they are loosely fitted in the engagement groove 49 of the cylinder 42. Then, the link 43 is configured such that the cylinder side engaging piece 43a moves and rotates as the cylinder 42 moves in the axial direction.

On the other hand, the slider side engagement piece 43b of the link 43 is engaged with the slider 44. In detail,
The sliders 44 are held slidably in the radial direction by guide rails (not shown) at the open ends of the mounting recesses 39a. The slider 44 is formed with an engagement recess 44a formed corresponding to the slider-side engagement piece 43b of the link 43.

In the engaging recess 44a of the slider 44,
The slider-side engagement piece 43b of the link 43 is engaged in a loosely fitted manner. Then, when the cylinder 42 moves in the axial direction and the link 43 rotates, the slider 44 moves in the radial direction along the guide rail due to the movement of the slider-side engagement piece 43b.

A snap guide jig 51 as a guide jig is fixed to each of the sliders 44. The snap guide jig 51 has a fixed portion 51a which extends in the radial direction and is fastened to the slider 44, and a guide piece 51b which is bent from the outer peripheral portion of the fixed portion 51a and extends in the axial direction. The outer peripheral surface of the guide piece 51b is formed in a substantially arc shape. Then, the inner wall surface of the guide piece 51b on the tip end side is expanded to form the guide surface 51c.
Has become. The guide surface 51c is formed in an arc shape having a predetermined curvature. Snap guide jig 51
Holds the snap ring R cut out on the guide surface 51c side, and the snap ring R is deformed in the radial direction by the radial movement of the slider 44. The guide surface 51c also serves as a guide for moving the sandwiched snap ring R in the axial direction.

As shown in FIG. 5, the pushing jig moving mechanism 33 includes a pushing cylinder 61, a shaft 62 and a pushing jig holder 63. The piston rod 61 a of the pushing cylinder 61 is connected to the shaft 62. The shaft 62 is connected to the cylinder 42.
The cylinder 42 and the cylinder body 39 are pierced in the axial direction, and are supported so as to be movable in the axial direction of the cylinder 42 and the cylinder body 39. And shaft 6
2 is a cylinder body 39 with its tip side (lower side in FIG. 5).
Protruding from.

The pushing jig holder 63 has the shaft 6
It is fastened to the tip of No. 2. As shown in FIGS. 1 and 6, the pushing jig holder 63 is provided with flanges 64 corresponding to the snap guide jigs 51 and extending in the radial direction at predetermined angles. The pressing jig 5 is attached to the flange 64 in such a manner that only radial movement is allowed.
2 are supported. That is, the flange 64 is formed with a pushing jig accommodating hole 64a that opens in the radial direction. On the other hand, the pushing jig 52 is accommodated in the pushing jig accommodating hole 64a and extends in the radial direction.
And a snap-in claw 52b that is bent from the outer peripheral portion of the base plate portion 52a and extends in the axial direction. And
In the pushing jig 52, the board portion 52a has the pushing jig accommodating hole 6
It can move in the radial direction by sliding along 4a. The outer peripheral surface of the snap-in claw 52b is formed in a substantially arc shape having a curvature substantially equal to that of the guide piece 51b (guide surface 51c).

Here, the pushing jig 52 is positioned in the radial direction with a slight gap with respect to the guide surface 51c of the snap guide jig 51. That is, when the snap guide jig 51 moves in the radial direction, the snap guide jig 51 moves in the radial direction together with the snap guide jig 51 so as to keep the gap substantially constant. More specifically, the flange 64 is formed with a through hole 64b penetrating in the axial direction with a sufficient allowance in the radial direction, and the snap guide jig 51 has a pushing jig 52 (a board portion 52a). ) And flange 64 (through hole 64)
An engagement pin 53, which is provided so as to project in the axial direction with respect to b), is fixed. The tip end of the engagement pin 53 penetrates the substrate portion 52a in such a manner as to allow the pushing jig 52 to move only in the axial direction and regulate the movement in the radial direction. Further, the tip end portion of the engagement pin 53 is allowed to move with respect to the flange 64 in the axial direction and the radial direction and is inserted into the through hole 64b. Then, the push-in jig 52 is positioned in the radial direction with respect to the snap guide jig 51 by the engagement pin 53 in the above-described manner.

Therefore, as shown in FIG. 1, when the snap guide jig 51 (slider 44) is moved in the radial direction, the engagement pin 53 is movable in the radial direction within the pushing jig accommodating hole 64a. The pushing jig 52 moves integrally in the radial direction. Also, as shown in FIG.
When the flange 64 (push-in jig holder 63) moves in the axial direction, the push-in jig 52 moves in the same direction while being guided by the engagement pin 53. Then, as a result, the pushing jig 52 becomes the snap guide jig 51 (guide piece 51
The tip of the snap pushing claw 52b can be retracted from the tip of b). As described above, the snap guide jig 51
Holds the snap ring R cut out by the guide surface 51c. The snap ring R is a snap guide jig 51 (guide surface 51c) with the tip end surface of the guide piece 51b protruding from the tip end surface of the snap pushing claw 52b.
The push ring 52 is pushed out in the axial direction in this state, whereby the snap ring R is sent to the outside of the guide piece 51b.

As shown in FIG. 5, the mounting confirmation mechanism 34 includes a linear gauge 66 and an engagement shaft 67. The linear gauge 66 is fixed to the second elevating frame 31 via a bracket (not shown), and ascends and descends integrally with the second elevating frame 31.
The linear gauge 66 has its meter-reading portion 66 a exposed above the third base 36. This linear gauge 66
Detects the movement distance of the meter reading unit 66a in the axial direction. The engagement shaft 67 passes through the third base 36 and the cylinder body 39 substantially parallel to the axial direction, and is supported so as to be movable in the axial direction of the third base 36 and the cylinder body 39. And the engaging shaft 6
7 has one end (upper side in FIG. 5) end surface 67 a protruding from the third base 36, and the other side (lower side in FIG. 5) end surface 67.
b is exposed in the mounting recess 39a. The end surface 67a of the engaging shaft 67 is adapted to be elastically contacted with the meter-reading portion 66a of the linear gauge 66. On the other hand, the end surface 67b of the engagement shaft 67 comes into contact with the attachment confirmation engagement piece 43c of the link 43. As described above, the slider 44 (snap guide jig 51) moves in the radial direction by the rotation of the link 43. Therefore, the rotation amount of the link 43 corresponds to the moving distance of the snap guide jig 51 in the radial direction. On the other hand, with the rotation of the link 43, the engagement shaft 67 moves up and down in the axial direction via the attachment confirmation engagement piece 43c. The attachment confirmation mechanism 34 detects the radial movement distance of the snap guide jig 51 by detecting the axial movement distance of the engagement shaft 67 according to the rotation amount of the link 43 by the linear gauge 66.

Next, the operation of such a snap ring assembling apparatus will be generally described with reference to FIG. Figure 7
(A) shows a mode in which snap rings R, R'are attached to workpieces W, W '(for example, mission cases) having different reference surfaces S, S'and having different shapes. , FIG. 7 (b) is shown in FIG. 7 (a).
It is an enlarged view which shows the inside of the area | region C. The workpieces W and W ′ have assembling grooves W1 and W1 ′ formed on their inner wall surfaces having different inner diameters r and r ′. It is assumed that the assembling grooves W1 and W1 'are axially separated from the reference surfaces S and S'by distances L and L', respectively. In addition,
The snap rings R and R ′ have a gap formed by cutting a part of the ring so that they can be deformed in the radial direction, and in a state where no load is applied (a state in which they are not elastically deformed in the radial direction). Inner diameters r and r'of workpieces W and W '(assembly groove W
It has an outer diameter slightly larger than the inner diameter of 1, W1 ').

In assembling, in order to sandwich the cut snap rings R, R'with the snap guide jig 51 (guide surface 51c), the jig expanding mechanism 32 is used.
Is driven to move the snap guide jig 51 in the radial direction until the snap rings R, R'are separated by a larger distance than the outer diameters of the snap rings R, R ', and the snap rings R, R'are loosely fitted. Then, in this state, the snap guide jig 51 is moved in the radial direction toward the diameter reducing side to sandwich the snap rings R, R ′. At this time, as described above, the snap rings R and R'are held by the snap guide jig 51 on the tip side of the push jig 52 (snap push claw 52b).

With the snap rings R and R ′ held therebetween, the piston rod 13 of the air cylinder 12 for raising and lowering the first unit is first projected and retracted with respect to the works W and W ′ so that the entire first raising and lowering unit 20. Up and down (Fig. 4
reference). Then, the front end surface 27a of the positioning leg 27 is connected to the reference surface S, which is a predetermined end surface (front end surface) of the work W, W '.
By contacting with S ′, the positioning of the entire first elevating unit 20 in the axial direction is performed with respect to the reference surfaces S and S ′ of the respective works W and W ′.

Next, the rotary shaft 28 of the assembling groove height adjusting servomotor 22 is driven, and at the same time, the piston rod 29 of the balance air cylinder 23 is projected and retracted so that the second lifting unit 30 is moved. Move up and down. Then, the positions of the upper ends of the preset assembling grooves W1, W1 ′ (reference plane S,
The tip end surface of the guide piece 51b is made to substantially coincide with the position separated from the S ′ by the distances L and L ′ in the axial direction). As a result, the second elevating unit 30 is axially positioned with respect to the positions of the assembling grooves W1 and W1 ′ of the works W and W ′.

Next, the piston rod 61a of the pushing cylinder 61 is projected and retracted, and the pushing jig 52 is axially moved along the guide surface 51c via the shaft 62 and the pushing jig holder 63. Then, the snap rings R, R ′ sandwiched by the snap guide jig 51 (guide surface 51) are pressed toward the work W, W ′ side. At this time, the snap rings R and R ′ move along the guide surface 51c.

When the snap rings R, R'are pushed out from the tip of the guide piece 51b by such movement,
As shown in FIG. 7B, the snap rings R and R ′ are the same.
Is expanded in the radial direction by its own elastic force, and the assembling groove W1,
It is assembled in W1 '.

Assembling groove W for snap rings R and R '
When the assembling into 1, W1 'is completed, the snap guide jig 51 and the pushing jig 52 are once moved in the radial direction toward the diameter reducing side. Then, the snap guide jig 51
With the tip of the pressing jig 52 (snap pressing claw 52b) protruding beyond the (guide piece 51b), the snap guide is fixed until the outer peripheral surface of the snap pressing claw 52b contacts the inner peripheral surfaces of the snap rings R, R '. Tool 51 and pushing jig 52
Is moved in the radial direction. The radial movement distance when contacting the inner peripheral surfaces of the snap rings R and R '(slider 4
4 movement distance) is an engagement piece 43c for confirming the attachment of the link 43
The linear gauge 66 detects the moving distance in the axial direction of the meter portion 66a via the engagement shaft 67, and thereby confirms the mounting of the snap rings R, R'into the mounting grooves W1, W1 '. .

As described in detail above, according to this embodiment, the following effects can be obtained. (1) In the present embodiment, the snap guide jig 51 is moved in the radial direction by the jig expanding mechanism 32. Therefore, various snap rings (R, R ') having different diameters can be held by the guide surface 51c by moving the snap guide jig 51 in the radial direction. In addition, the pushing jig 52
Moves in the radial direction in conjunction with the radial movement of the snap guide jig 51, and the pushing jig moving mechanism 33 causes the guide surface 51c with respect to the snap guide jig 51.
Along the axis relative to the axial direction. As a result, the snap ring (R, R ') held by the guide surface 51c of the snap guide jig 51 is sent out to the assembly groove (W1, W1') by the pushing jig 51. In this way, various snap rings (R, R ') having different diameters are respectively held by the guide surface 51c of the snap guide jig 51, and the pushing jig 52 holds the assembling groove (W, W') of the work (W, W '). W1, W1 ') and can be assembled.

(2) In the present embodiment, the snap guide jig 51 can be moved in the radial direction with a simple structure having a mechanical connection structure including the cylinder 42, the link 43 and the slider 44.

(3) In the present embodiment, the attachment confirmation mechanism 34
Is connected to a link 43 that constitutes the jig diameter expanding mechanism 32, and detects the radial movement distance of the snap guide jig 51 according to the amount of rotation of the link 43. That is, by detecting the radial movement distance of the snap guide jig 51 when the pushing jig 52 comes into contact with the snap ring (R, R ') assembled in the assembly groove (W1, W1'), Snap ring (R, to the assembling groove (W1, W1 '))
You can check the assembly of R ').

(4) In this embodiment, the pushing jig 52
Is an engagement pin 53 fixed to the snap guide jig 51.
Is penetrated in the axial direction to restrict relative movement in the radial direction with respect to the snap guide jig 51, and relative movement in the axial direction is allowed. Therefore, the pushing jig 52
Moves in the radial direction in conjunction with the snap guide jig 51 via the engagement pin 53. In addition, the pushing jig 52
Moves relative to the snap guide jig 51 in the axial direction along the guide surface 51c without being restricted by the engagement pin 53. In this way, the pushing jig 52
Is an engagement pin 53 fixed to the snap guide jig 51.
With a very simple structure by engaging with, it moves in the radial direction in conjunction with the snap guide jig 51 and moves relative to the snap guide jig 51 in the axial direction along the guide surface 51c.

(5) In this embodiment, the first unit lifting air cylinder 12 is driven to move the first lifting frame 21 in the axial direction with respect to a predetermined end surface (reference surface S, S ') of the work (W, W'). Positioning is done. Then, by the assembly groove height adjusting servomotor 22 and the balance air cylinder 23 being driven, the first ascending / descending axially positioned with respect to a predetermined end surface (reference surface S, S ′) of the work (W, W ′). With reference to the frame 21, the axial direction of the snap guide jig 51 and the pushing jig 52 supported by the second elevating frame 31 with respect to the assembling grooves (W1, W1 ′) formed in the work (W, W ′) Is positioned. In this way, the snap guide jig 51 and the push-in jig are respectively mounted on the assembling grooves (W1, W1 ') formed on the various works (W, W') having different shapes (positions of the predetermined end surface and assembling groove). By positioning the tool 52 in the axial direction, the snap ring (R, R ') is moved to the mounting groove (W1, W1') of the workpiece (W, W ') at a substantially constant axial movement distance. It can be sent out and assembled. Therefore, it is possible to prevent excessive force from being applied to the snap ring (R, R ') to be deformed and the snap ring (R, R') to be deformed or to be detached before assembly.

(6) In this embodiment, the radial movement of the snap guide jig 51 and the pushing jig 52 can be strictly controlled by controlling the rotational drive of the claw expansion switching servomotor 41.

(7) In this embodiment, the second lifting frame 31 (snap guide jig 51 and pushing jig 5 is controlled by controlling the rotational drive of the assembly groove height adjusting servomotor 22.
The movement in the axial direction of 2) can be strictly controlled. Then, the assembling grooves (W1, W ') formed in the work (W, W').
The positioning of the snap guide jig 51 and the pushing jig 52 supported by the second elevating frame 31 with respect to 1 ') in the axial direction can be made more precise.

(8) In this embodiment, the pushing jig 52 can also be used as a jig for checking the assembly of the snap rings (R, R '). The embodiment of the present invention is not limited to the above-mentioned embodiment, but may be modified as follows.

In the above embodiment, the snap guide jig 51 (and the pushing jig 52) is moved in the radial direction by the link mechanism having the link 43. On the other hand, the snap guide jig 51 may be moved in the radial direction by the gear connection shown in FIG. That is, in the figure, a pinion 71 as a rotating body is provided in place of the link 43. The cylinder 42 and the slider 44 are provided with gear portions 72 and 73 that mesh with the gear portion 71a of the pinion 71, respectively. Therefore, the pinion 71 rotates as the cylinder 42 moves in the axial direction. Then, as the pinion 71 rotates, the slider 44 (snap guide jig 51) moves in the radial direction. Even with such a change, the same effect as that of the above embodiment can be obtained. Further, instead of gear connection, chain connection or belt connection may be adopted.

The configuration of the snap ring assembling device in the above embodiment is an example, and the configuration shown in FIG. 9 may be adopted, for example. That is, the snap ring assembling device is configured such that the first cylinder 10 having different strokes is used.
The first and second cylinders 102, the synchronization mechanism 103, the snap guide jig 104, and the pushing jig 105 are provided.

The first cylinder 101 has its rod 1
The tip of 01a is fixed to the top plate 106. The top plate 106 is fixed in the axial direction, and the first cylinder 10
1 is moved up and down with respect to the top plate 106 by retracting the rod 101a. This first cylinder 1
The second cylinder 102 main body is fixed to the 01 main body, and the first cylinder 101 moves up and down with respect to the top plate 106 together with the second cylinder 102 by retracting the rod 101a.

The second cylinder 102 has its rod 1
The tip of 02a is connected to the synchronization mechanism 103.
More specifically, the synchronization mechanism 103 includes the sleeve 111.
And a link 112 and a slider 113,
The tip of the rod 102a is fixed to the sleeve 111. Therefore, the second cylinder 102 is
The sleeve 111 is moved up and down by retracting a.

That is, the sleeve 111 of the synchronizing mechanism 103 moves up and down with respect to the top plate 106 when one of the rods 101a and 102a of the first and second cylinders 101 and 102 is retracted. . It should be noted that the sleeve 111 is provided with an engaging groove 111a for engaging with the link 112.

The link 112 is rotatably supported by a base (not shown) so as to engage with the sleeve 111 and the slider 113. This link 112 has approximately 9
A sleeve-side engagement piece 112a and a slider-side engagement piece 112b are formed that extend in the radial direction at an angle of 0 degree.

The sleeve side engagement piece 11 of the link 112.
2a is engaged with the engagement groove 111a of the sleeve 111 in a loosely fitted manner. Then, the link 112 is engaged with the sleeve-side engagement piece 11 as the sleeve 111 moves in the axial direction.
2a moves and rotates.

On the other hand, the slider-side engagement piece 112b of the link 112 is engaged with the slider 113. More specifically, the slider 113 is held slidably in the radial direction by a guide rail (not shown). And
The slider 113 has an engaging recess 113 formed corresponding to the slider-side engaging piece 112b of the link 112.
a is formed.

The slider-side engagement piece 112b of the link 112 is engaged with the engagement recess 113a of the slider 113 in a loosely fitted manner. Then, when the sleeve 111 moves in the axial direction and the link 112 rotates, the slider 113 moves in the radial direction along the guide rail by the movement of the slider-side engagement piece 112b. For example, when the sleeve 111 moves to one side in the axial direction (the lower side in FIG. 9) and the link 112 rotates, the slider 1
13 moves so as to expand in the radial direction. On the contrary, when the sleeve 111 moves to the other side in the axial direction (the upper side in FIG. 9) and the link 112 rotates, the slider 113 moves so as to contract in the radial direction.

The snap guide jig 104 is fixed to the slider 113. The snap guide jig 104 has a fixed portion 104a that extends in the radial direction and is fastened to the slider 113, and a guide piece 104b that is bent from the outer peripheral portion of the fixed portion 104a and extends in the axial direction. The inner wall surface of the guide piece 104b is a guide surface 104c. Snap guide jig 1
Reference numeral 04 is for sandwiching the outer peripheral surface of the snap ring R cut out on the guide surface 104c side, and deforms the snap ring R in the radial direction by the radial movement of the slider 113. The guide surface 104c also serves as a guide for moving the sandwiched snap ring R in the axial direction.

The sleeve 111 has its tip end exposed on the inner wall surface side of the snap guide jig 104 in a manner capable of moving relative to the snap guide jig 104 in the axial direction. The pushing jig 105 is fixed to the tip of the snap guide jig 104 via a biasing member 114 extending in the radial direction.

That is, the pushing jig 105 is housed in the urging member 114 and extends in the radial direction.
5a and a snap-in claw 105b that is bent from the outer peripheral portion of the base plate portion 105a and extends in the axial direction.
The pushing jig 105 is urged by the urging member 114 such that the substrate portion 105 a is pressed against the inner wall surface of the snap guide jig 104. Therefore, the pushing jig 1
Reference numeral 05 is adapted to move integrally with the radial movement of the snap guide jig 104 in the radial direction. In the pushing jig 105, the outer wall surface of the snap pushing claw 105b is always in contact with the inner wall surface of the snap guide jig 104.

As described above, the snap guide jig 104
Moves in the radial direction via the link 112 and the slider 113 by the movement of the sleeve 111 in the axial direction. The pushing jig 105 moves in the radial direction integrally with the movement of the snap guide jig 104 in the radial direction. At this time, the snap guide jig 10
Pushing jig 1 fixed axially to the tip of 4
Reference numeral 05 also moves in the axial direction integrally with the movement of the sleeve 111 in the axial direction. That is, the pushing jig 105 moves in the radial direction together with the snap guide jig 104 by the sleeve 111 in synchronism with the movement in the axial direction, and also moves in the axial direction relative to the snap guide jig 104.

FIG. 10 is an explanatory view showing the operation of the snap ring assembling apparatus having such a structure. In FIG. 10, FIG. 10A shows a snap guide jig 104 holding a snap ring R corresponding to the assembly groove W1 of the work W.
3 shows a state in which only the rod 101a of the first cylinder 101 is pulled in when the is positioned in the axial direction.
In this state, the snap guide jig 104 moves the rod 1
It has a relatively large inner diameter corresponding to the retracted amount of only 01a, and corresponds to the case of holding the snap ring R having a relatively large diameter.

Further, FIG. 10 (b) similarly shows the first and second cylinders in a state where the snap guide jig 104 holding the snap ring R corresponding to the assembly groove W1 of the work W is axially positioned. 101 and 102 rod 1
The state where both 01a and 102a are pulled in is shown. In this state, the snap guide jig 104 moves the rod 101
It has a small inner diameter corresponding to the amount of both a and 102a drawn in, which corresponds to the case where a snap ring R having a relatively small diameter is held.

FIG. 10C shows the first cylinder 10 in a state in which the snap ring R having each of the above diameters is held.
1 shows a state in which the first rod 101a (and the rod 102a of the second cylinder 102) is pushed out. Figure 10 (a)
At the time of shifting from each state of (b) to the state of FIG. 10 (c), the snap ring R is pushed by pushing only the pushing jig 105 in the axial direction while expanding the diameter of the snap guide jig 104 and the pushing jig 105. Is sent to the outside of the guide piece 104b by the snap pushing claw 105b. At this time,
The snap ring R expands in the radial direction by its own elastic force and is assembled in the assembly groove W1.

In order to keep the amount of radial movement of the snap guide jig 104, that is, the inner diameter of the snap guide jig 104, to be maintained substantially constant and stable, the first and second cylinders 101 and 102 are provided with rods. 101a, 102
It is preferable to use a by appearing and disappearing at the stroke end. Therefore, in this case, the movement amount of the sleeve 111 in the axial direction is different for each rod 101 having a different stroke.
Four types of settings are possible by combining the maximum stroke and the minimum stroke of a and 102a. And
It is possible to set four kinds of inner diameters of the snap guide jig 104 that fluctuate according to the amount of movement of the sleeve 111 in the axial direction, and four kinds of snap rings R held by the snap guide jigs 104 having different outer diameters can be supported. Become.

The structure of the radial movement mechanism (diameter expanding mechanism) of the snap guide jig in the above embodiment is an example, and the structure shown in FIG. 11 may be adopted, for example.
That is, FIG. 11 is a schematic configuration diagram showing an assembling apparatus for assembling the snap ring R into the assembling groove W12 provided around the inner wall surface of the substantially cylindrical work W11. In this configuration, a plurality of snap guide jigs 76 as guide jigs are arranged at predetermined angles in the circumferential direction. A pushing jig 77 that moves in the radial direction in synchronization with the snap guide jig 76 is provided on the inner wall surface side of each snap guide jig 76. On the other hand, the outer peripheral surface of the snap guide jig 76 is formed with a taper 76a whose diameter is reduced from the substantially central portion in the axial direction toward each tip side. Then, on the outer peripheral side of the snap guide jig 76, each of the tapers 76a
A jig holder 78 that constitutes a first moving mechanism that is provided around is provided. The inner wall surface of the jig holder 78 has a taper 7 formed corresponding to the taper 76a.
8a is formed. The jig holders 78 are arranged substantially symmetrically with respect to the axial center of the snap guide jig 76. Then, each snap guide jig 76
Is supported with a force on the expanded side, and the jig holder 78
The taper 78a comes into contact with the taper 76a to restrict the radial movement (diameter expansion) of each snap guide jig 76. Each jig holder 78 is connected to a rotary shaft 79a of a servo motor 79 which constitutes a first moving mechanism, and when the servo motor 79 is driven, the jig holders 78 move in opposite directions while maintaining the above-mentioned substantially symmetrical arrangement state. It is supposed to do. Therefore, for example, when these jig holders 78 are moved in the direction in which they are separated from each other, the snap guide jig 76 will move the taper 7
6a expands in the radial direction by the distance until the taper 78a contacts the taper 78a. In this way, by moving the snap guide jig 76 in the radial direction according to the outer diameter of the snap ring R, the snap ring R can be clamped according to the above-described embodiment. Therefore, in assembling the snap ring R, first, the cut snap ring R is sandwiched by the snap guide jigs 76, and the radial distance between the snap guide jigs 76 is substantially equal to the inner diameter of the work W11. The snap guide jig 76 is moved in the radial direction up to. Then, in this state, the snap guide jig 76 is placed on the upper end surface of the work W11 on a substantially concentric axis (in FIG. 11, the snap guide jig 76 is depicted separated for convenience). And
In this state, the pushing jig 77 is moved in the axial direction to push the snap ring R toward the work W11 side. At this time, the snap ring R moves along the inner wall surface (guide surface) of the snap guide jig 76 and the inner wall surface of the work W11.
Due to such movement, the snap ring R causes the work W1.
When reaching the position of the assembling groove W12 of No. 1, the snap ring R
Is expanded in the radial direction by its own elastic force, and the assembly groove W12
It is assembled inside.

In the above embodiment, the snap ring is assembled in the assembly groove formed on the inner wall surface of the work. On the other hand, the snap ring may be assembled in the assembly groove formed on the outer wall surface of the work. Specifically, a guide surface is formed on the outer peripheral side of the snap guide jig 51, and the snap ring is held in such a manner that the inner diameter of the snap ring is expanded in the radial direction until the inner diameter of the snap ring substantially matches the outer diameter of the work. To do. And the pushing jig 5
2 is arranged outside the snap guide jig 51 so as to be movable relative to the snap guide jig 51 along the guide surface in the axial direction. Accordingly, the pushing jig 52 is moved relative to the snap guide jig 51 in the axial direction, so that the snap ring held by the snap guide jig 51 is formed on the outer wall surface of the work according to the above-described embodiment. It can be sent to the assembly groove and assembled. Even with such a change, the same effect as that of the above embodiment can be obtained.

Further, for example, the configuration shown in FIG. 12 may be adopted. That is, FIG. 12 shows a substantially cylindrical work W.
FIG. 3 is a schematic configuration diagram showing an assembling device for assembling a snap ring R into an assembling groove W22 provided around an outer wall surface of 21. In this structure, a plurality of snap guide jigs 81 as guide jigs are arranged at predetermined angles in the circumferential direction. A pushing jig 82 that moves in the radial direction in synchronization with the snap guide jig 81 is provided on the outer wall surface side of each snap guide jig 81. On the other hand, on the inner peripheral surface of the snap guide jig 81, there is formed a taper 81a whose diameter increases from the substantially central portion in the axial direction toward each tip side. Then, on the inner peripheral side of the snap guide jig 81, a jig guide 83 constituting a first moving mechanism is provided corresponding to each of the tapers 81a. On the outer wall surface of the jig guide 83, a taper 83a formed corresponding to the taper 81a is formed. The jig guides 83 are arranged substantially symmetrically with respect to the axial center of the snap guide jig 81. Each snap guide jig 81 is supported with a force on the diameter reducing side, and the jig guide 83 has a taper 83a in contact with the taper 81a so that the snap guide jig 81 moves in the radial direction. Restrict movement (diameter reduction). Each jig guide 83 is connected to a rotary shaft 79a of a servo motor 79, and when the servo motor 79 is driven, the jig guides 83 move in opposite directions while maintaining the above-mentioned substantially symmetrical arrangement state. Therefore, for example, when these jig guides 83 move toward each other, the snap guide jig 81 expands in the radial direction by the distance until the taper 81a contacts the taper 83a. in this way,
Depending on the inner diameter of the snap ring R, the snap guide jig 8
By moving 1 in the radial direction, the snap ring R can be held in such a manner that it is expanded in the radial direction. Therefore, when assembling the snap ring R, first,
The cut snap ring R is attached to the snap guide jig 8
1, and the snap guide jigs 81 are moved in the radial direction until the radial distance between the snap guide jigs 81 substantially matches the outer diameter of the work W21. Then, in this state, the snap guide jig 81 is placed on the upper end surface of the work W21 on a substantially concentric axis (in FIG. 12, the snap guide jig 81 is depicted separated for convenience). Then, in this state, the pushing jig 82 is moved in the axial direction to move the snap ring R to the work W.
21 side is pressed. At this time, the snap ring R is attached to the outer wall surface (guide surface) of the snap guide jig 81 and the work W.
It moves along the outer wall surface of 21. When the snap ring R reaches the position of the assembling groove W22 of the work W21 by such movement, the snap ring R is radially expanded by its own elastic force and is assembled in the assembling groove W12.

In the above-described embodiment, the jig expanding mechanism 32 is driven by providing the claw expansion switching servomotor 41. However, for example, a cylinder may be provided instead of this. -In the above embodiment, the claw expansion switching servomotor 4
1 rotation through the ball screw 45 to the taper type slider 4
It was converted into 6 linear motions. On the other hand, the rotation of the pawl expansion switching servomotor 41 may be converted into the linear movement of the taper type slider 46 by a worm gear, for example.

In the above embodiment, the second elevating frame 31 is moved in the axial direction by driving the assembling groove height adjusting servomotor 22, but a cylinder may be provided instead of this, for example. .

In the above-described embodiment, the rotation of the assembling groove height adjusting servomotor 22 is linearly moved by the ball screw 35a to the second elevating frame 31 (movement in the axial direction).
Converted to. On the other hand, for example, a worm gear may be used to convert the rotation of the assembly groove height adjusting servomotor 22 into a linear movement (movement in the axial direction) of the second elevating frame 31.

Although not particularly mentioned in the above-mentioned embodiments, in the case of the snap guide jigs 51 and 104 which hold the snap ring R by sandwiching the outer peripheral surface of the snap ring R with the guide surfaces 51c and 104c, The shape shown in FIG. 13 may be used. In addition, in FIG.
Is a plan view showing an initial state in which the cut snap ring R is held by the snap guide jigs 51 and 104, and FIG. 13B is an enlarged view showing a region C1 of FIG. 13A. FIG. 13C is a front view of FIG. 13B viewed from the c direction. As shown in the figure, of the plurality of snap guide jigs 51, 104, the snap guide jigs 51, 104 arranged corresponding to the joint A of the snap ring R,
On the guide surfaces 51c and 104c of 104, engaging pieces 121 are provided so as to project radially inward.

The engaging piece 121 is formed at one end A of the joint A.
1 has a concave portion 122 which is provided in the circumferential direction so as to be opposed thereto. Then, on the inner side of the recess 122, a regulation surface 122a extending flat in the axial direction is formed. Further, the engagement piece 121 forms a guide surface 121a that is curved in the axial direction and is opposed to the other end A2 of the joint A.

FIG. 14 is an explanatory view showing the operation when the snap ring R is radially compressed in the snap guide jigs 51, 104 having such engagement pieces 121. As shown in FIG. 14A, the snap ring R
In the initial state in which is held by the snap guide jigs 51 and 104, the engagement piece 121 is arranged corresponding to the joint A of the snap ring R. In this state, it is assumed that the snap ring R is radially compressed as the snap guide jigs 51 and 104 move in the radial direction. At this time, FIG.
As shown in (b), the one side end portion A1 of the joint A is locked by the regulation surface 122a to regulate the movement in the circumferential direction. The one end A1 of the joint A is moved in the axial direction by the recess 12
Needless to say, it is regulated by the inner wall surface of 2. On the other hand, the other end A2 of the joint A is guided along the guide surface 121a and moves in the axial direction while moving in the circumferential direction. When the snap ring R is further compressed in the radial direction as the snap guide jigs 51, 104 move in the radial direction, the other end portion A2 of the joint A is moved to the above-mentioned position as shown in FIG. 14C. After climbing up the guide surface 121a, the same end portion A2 is shifted and compressed in a state substantially parallel to the one end portion A1 in the axial direction. By making such changes, the following effects can be obtained in addition to the same effects as those of the above-described embodiments.

(1) In the radial compression of the snap ring R, both end portions A1 and A of the joint A of the snap ring R
2 can be prevented from interfering with each other, and smooth compression can be performed. Alternatively, it is not necessary to separately provide an actuator for displacing both end portions A1 and A2 of the joint A of the snap ring R, and the number of parts and the cost can be reduced.

(2) In the radial compression of the snap ring R accompanying the radial movement of the snap guide jigs 51, 104, one end A1 of the joint A is fixed by the restriction surface 122a. Therefore, the phase of the snap ring R can be kept constant with reference to the one end A1 of the joint A.

Although not particularly mentioned in each of the above-mentioned embodiments, FIG. 15 shows a device (snap ring cutting device) as a device (snap ring cutting device) for cutting and supplying snap rings individually (one by one) to this snap ring assembling device. What is shown is considered. That is, this snap ring cutting device is configured to cut out corresponding to various snap rings R having different diameters and widths (thicknesses) in the axial direction. More specifically, the magazine 85 in which a plurality of axially stacked snap rings R are loosely fitted and set is divided into a plurality of pieces in the circumferential direction. And this magazine 8
The inner wall surface of 5 has a taper 85a at one side in the axial direction (see FIG.
(Upper side of the). This magazine 85
The wedge-shaped jig 8 in such a manner that it is sandwiched by its inner wall surface.
6 is accommodated, and the taper 85a is provided on the outer peripheral surface thereof.
A taper 86a is formed corresponding to the. A screw shaft 87a that rotates integrally with the magazine diameter adjusting handle 87 meshes with the wedge-shaped jig 86.
6 moves in the axial direction (vertical direction) according to the rotation of the magazine diameter adjusting handle 87. The magazine 85 moves in the radial direction according to the contact state with the wedge-shaped jig 86 (taper 86a) by moving the wedge-shaped jig 86 in the axial direction. As a result, this magazine 85 can be set by stacking various snap rings R having different diameters (inner diameters) in the axial direction. The magazine 85 is supported via a rack and pinion jig 88, and moves in the axial direction (vertical direction) according to the rotation of the cutout clearance adjusting handle 89. Accordingly, the snap ring cutout clearance D can be set according to the thickness of the snap ring R. Then, in this state, the cutting cylinder 90 is driven to feed the cutting plate 90a to the snap ring R, so that various snap rings R having different diameters and axial widths (thicknesses) can be transferred to the snap ring assembling device. And can be cut out individually.

In the above-described embodiment, the present invention is applied to the assembling device for assembling the snap ring as the spring ring on the work. On the other hand, the present invention may be applied to, for example, an assembling device that attaches a piston ring (compression ring, oil ring) to a work (piston).

Next, technical ideas other than the claims that can be understood from the above embodiments will be described below together with their effects. (A) In the spring ring assembling device according to any one of claims 1 to 5, the first moving mechanism moves the guide jig in a radial direction by rotationally driving a servo motor. Spring ring assembly device. According to this configuration, the radial movement of the guide jig (and the pushing jig) is strictly controlled by controlling the rotation drive of the servo motor.

(B) In the spring ring assembling apparatus according to the fifth aspect, the first supporting member moving mechanism moves the first supporting member in the axial direction by rotationally driving the servo motor. Spring ring assembly device. According to this configuration, the movement of the first support member (the guide jig and the pushing jig) in the axial direction is strictly controlled by controlling the rotation drive of the servo motor. The positioning of the guide jig and the pushing jig supported by the first support member in the axial direction with respect to the assembling groove formed in the work is also made more strict.

[0098]

As described in detail above, according to the invention described in claim 1, various kinds of spring rings having different diameters can be assembled in the assembly groove of the work.

According to the second aspect of the present invention, the guide jig can be moved in the radial direction with a simple structure of the mechanical connection structure including the first moving body, the rotating body, and the second moving body. .

According to the invention described in claim 3, by detecting the radial movement distance of the guide jig when the guide jig or the pushing jig is brought into contact with the spring ring assembled in the assembly groove. You can check the assembly of the spring ring in the assembly groove.

According to the invention as set forth in claim 4, the pushing jig has a very simple structure by engaging with the engaging pin fixed to the guide jig, and is linked to the guide jig in the radial direction. While moving, it moves relative to the guide jig in the axial direction along the guide surface.

According to the fifth aspect of the present invention, the spring ring is formed on various works having different shapes (positions of the predetermined end face and the assembling groove) without being deformed or being disengaged before the assembling. The spring ring can be assembled in the assembled groove.

According to the sixth aspect of the present invention, it is possible to avoid mutual interference between the both ends of the abutment of the spring ring in the radial compression of the spring ring, and it is possible to achieve smooth compression. According to the invention as set forth in claim 7, when the spring ring is compressed in the radial direction, one end of the abutment of the spring ring is fixed by the regulation surface. The phase of the spring ring can be kept constant based on the part.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the overall configuration of the same embodiment.

FIG. 3 is a cross-sectional view showing the same embodiment.

FIG. 4 is a cross-sectional view showing an operation mode of the same embodiment.

FIG. 5 is a cross-sectional view showing an operation mode of the same embodiment.

FIG. 6 is a cross-sectional view showing an operation mode of the same embodiment.

FIG. 7 is a cross-sectional view showing an operation mode of the same embodiment.

FIG. 8 is a sectional view showing another example of the same embodiment.

FIG. 9 is a schematic configuration diagram showing another example of the same embodiment.

FIG. 10 is an explanatory view showing the operation of the another example.

FIG. 11 is a schematic configuration diagram showing another example of the same embodiment.

FIG. 12 is a schematic configuration diagram showing another example of the same embodiment.

FIG. 13 is a schematic configuration diagram showing another example of the same embodiment.

FIG. 14 is an explanatory diagram showing an operation of the another example.

FIG. 15 is a schematic configuration diagram showing a snap ring cutting device.

FIG. 16 is a schematic configuration diagram showing a conventional example.

[Explanation of symbols]

W, W ', W11, W21 Work W1, W1', W12, W22 Assembly groove R, R'Snap ring A as spring ring A Joint A1, A2 One side and the other side end 12 Second support member moving mechanism Constituting first unit lifting air cylinder 21 First lifting frame 22 as second supporting member Mounting groove height adjusting servo motor 23 constituting first supporting member moving mechanism Balance air constituting first supporting member moving mechanism Cylinder 31 Second elevating frame 32 as first supporting member 32 Jig expanding mechanism 33 constituting first moving mechanism 33 Pushing jig moving mechanism 42 constituting second moving mechanism Cylinders 43, 112 times as first moving body Links 44, 113 as moving bodies Sliders 51, 76, 81, 104 as second moving bodies Snap guide jigs 51c, 104c as guide jigs Surfaces 52, 77, 82, 105 Push-in jig 53 Engaging pin 71 Pinion 78 as a rotating body Jig holder 79 that constitutes the first moving mechanism 79 Servo motor 83 that constitutes the first moving mechanism Configure the first moving mechanism Jig guide 101 First cylinder 102 constituting first and second moving mechanism Second cylinder 103 constituting first and second moving mechanism Synchronizing mechanism 111 constituting first and second moving mechanism 111 As first moving body Sleeve 121 Engaging piece 121a Guide surface 122a Restricting surface

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Akihiro Fukuda             10 Akane, Takane, Fujii-cho, Anjo City, Aichi Prefecture             N AW Co., Ltd. (72) Inventor Minoru Hidaka             10 Akane, Takane, Fujii-cho, Anjo City, Aichi Prefecture             N AW Co., Ltd. (72) Inventor Kuniyuki Hashimoto             10 Akane, Takane, Fujii-cho, Anjo City, Aichi Prefecture             N AW Co., Ltd. (72) Inventor Tomoaki Eguchi             10 Akane, Takane, Fujii-cho, Anjo City, Aichi Prefecture             N AW Co., Ltd. (72) Inventor Kenji Sakai             131, Gongen, Minowa Town, Anjo City, Aichi Prefecture             Inside Chubu Mechanical Engineering Lab F-term (reference) 3C030 BB17 BC04 BC25

Claims (7)

[Claims] 1. A spring ring assembling apparatus that sends a spring ring to an assembling groove circumferentially provided on a work and assembles the spring ring into the assembling groove by a radial elastic force of the spring ring. A plurality of guide jigs that are arranged substantially along the axis and that hold the spring ring on a guide surface that extends in the axial direction; a first moving mechanism that moves the guide jigs in the radial direction; And a spring ring that is held by the guide surface while being moved in the radial direction in conjunction with the radial movement of the guide jig and moving relative to the guide jig in the axial direction along the guide surface. A plurality of pushing jigs for sending the pushing jigs to the assembling groove, and a second moving mechanism for moving the pushing jigs relative to the guide jig in the axial direction along the guide surface. Spring Rin Assembling device. 2. The spring ring assembling apparatus according to claim 1, wherein the first moving mechanism is a first moving body that is driven to move in an axial direction, and the first moving body is connected to the first moving body. A rotating body that rotates based on the movement of the moving body in the axial direction; and a second moving body that is connected to the rotating body and is fixed to the guide jig that moves in the radial direction based on the rotation of the rotating body. A spring ring assembling device characterized by being provided. 3. The spring ring assembling apparatus according to claim 2, further comprising a detection unit that is connected to the rotating body and detects a moving distance in a radial direction of the guide jig according to a rotation amount of the rotating body. A spring ring assembling device characterized by being provided. 4. The spring ring assembling apparatus according to claim 1, wherein the pushing jig is axially penetrated by an engaging pin fixed to the guide jig. A spring ring assembling device, wherein relative movement in a radial direction is restricted with respect to a jig and relative movement in an axial direction is allowed. 5. The spring ring assembling device according to claim 1, wherein a first supporting member that supports the guide jig and the pushing jig, and the first supporting member in an axial direction. A first supporting member moving mechanism for moving, a second supporting member for supporting the first supporting member via the first supporting member moving mechanism, and a second supporting member moving for moving the second supporting member in an axial direction. A mechanism, the second support member moving mechanism is driven for positioning the second support member in the axial direction with respect to a predetermined end surface of the work, and the first support member moving mechanism is a predetermined end surface of the work. With respect to the second support member axially positioned with respect to the axial direction of the guide jig and the pushing jig supported by the first support member with respect to the assembly groove formed in the work. Positioning A spring ring assembling device, characterized in that it is driven for. 6. The spring ring assembling device according to claim 1, wherein the guide jig holds the spring ring by sandwiching an outer peripheral surface of the spring ring with the guide surface. On the guide surface of the guide jig arranged corresponding to the abutment of the spring ring, both side ends of the abutment due to the radial compression of the spring ring accompanying the radial movement of the guide jig. A spring ring assembling device, characterized in that an engagement piece for displacing the parts in the axial direction is provided. 7. The spring ring assembling apparatus according to claim 6, wherein the engagement piece is located on one side of the abutment when the spring ring is radially compressed as the guide jig moves in the radial direction. It has a regulation surface for regulating the movement of the end portion in the circumferential direction and a guide surface for guiding the other end portion in the axial direction with the movement of the other end portion of the abutment in the circumferential direction. Assembling device for spring ring.