JP2004011696A - Method and device for inserting snap ring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for inserting a snap ring capable of easily mounting the snap ring to a ring groove formed on the inner surface of a cylindrical part, in a treatment member including an outer member that has the cylindrical part and an inner member having an outer diameter smaller than the inner diameter of the cylindrical part and is disposed coaxially in the cylindrical part so as to project from the cylindrical part. <P>SOLUTION: In this method, the snap ring inserting device 1 having a rotary table 40 for rotating a placed treatment member 5, an insertion section 11 for pressing a part of the snap ring 60 into a clearance 533, and a pressing section 21 for pressing, toward the clearance 533, the part non-inserted into the clearance 533, are used. In this method, the rotary table 40 is rotated so that the part pressed by the pressing section 21 is sequentially pressed into the clearance 533 by the insertion section 11. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
【Technical field】
The present invention relates to a device for mounting a snap ring on an inner peripheral surface of a cylindrical member and a method for mounting the device.
[0002]
[Prior art]
In mounting the snap ring in the ring groove provided on the inner peripheral surface of the cylindrical member, it is common to use a special tool capable of holding the snap ring at a narrow gap.
In mounting the snap ring using this special tool, first, the snap ring is restrained so as to reduce the gap between the abutments, and the snap ring is pushed into the inner peripheral surface side of the member while maintaining the state. Then, the ring groove provided on the inner peripheral surface and the snap ring are opposed to each other. Thereafter, when the snap ring is released by releasing the restriction by the dedicated tool, the snap ring is firmly mounted in the ring groove by a spring force that attempts to restore the gap between the joints.
[0003]
[Problem to be solved]
However, the above-mentioned snap ring insert method and the special tool used for the method have the following problems.
That is, a processing member including an outer member having a cylindrical portion and an inner member having an outer diameter smaller than the inner diameter of the cylindrical portion and coaxially arranged in the cylindrical portion so as to protrude from the cylindrical portion. In this case, the snap ring is mounted in a ring groove formed on the inner peripheral surface of the cylindrical portion.
[0004]
When the gap between the cylindrical portion and the inner member is reduced, the outer diameter of the snap ring for pushing into the cylindrical portion and the inner diameter of the snap ring that can surround the outer periphery of the inner member become incompatible. That is, if the outer diameter of the snap ring is smaller than the inner diameter of the cylindrical portion, the inner diameter of the snap ring must be smaller than the outer diameter of the inner member. In such a case, it is impossible to push the snap ring in a state where the abutment is contracted into the gap as described above.
[0005]
The present invention has been made in view of such a conventional problem, and has an outer member having a cylindrical portion, an outer member having an outer diameter smaller than the inner diameter of the cylindrical portion, and an inner member having a cylindrical portion protruding from the cylindrical portion. An object of the present invention is to provide a snap ring insert method and a snap ring insert method capable of easily mounting a snap ring in a ring groove formed in an inner peripheral surface of the cylindrical portion in a processing member including an inner member coaxially arranged. It is.
[0006]
[Means for solving the problem]
The first invention includes an outer member having a cylindrical portion, and an inner member having an outer diameter smaller than the inner diameter of the cylindrical portion and coaxially arranged in the cylindrical portion so as to protrude from the cylindrical portion. A method for attaching a snap ring to a ring groove formed on an inner peripheral surface of the cylindrical portion by pushing a snap ring into a gap between the cylindrical portion and the inner member with respect to a processing member,
A ring setting step of disposing the snap ring on the opening of the gap of the processing member;
A ring inserting step of pushing one end of the snap ring into the gap by using insertion means and pressing a portion of the snap ring not inserted into the gap by the holding means toward an opening of the gap; ,
A rotating step of rotating the processing member so that the portions pressed by the pressing means are sequentially pushed into the gap by the inserting means (claim 1).
[0007]
The snap ring insert method according to the first invention is a method including the ring setting step, the ring inserting step, and the rotating step. According to this method, in the processing member including the outer member and the inner member, the snap ring can be easily and smoothly inserted into the gap between the cylindrical portion of the outer member and the inner member. Can be.
[0008]
That is, first, in the ring setting step, the snap ring is set to the processing member such that one end of the snap ring substantially coincides with the opening of the gap.
Next, in the ring insertion step, a part of the snap ring is pressed by the insertion means, and one end of the snap ring is pressed into the position of the ring groove in the gap. Further, a portion of the snap ring that has not yet been pressed into the gap is pressed toward the opening using the pressing means. Thereby, the inclination angle of the snap ring from the portion pushed into the gap to the portion not pushed is suppressed, and the snap ring of the portion not pushed into the gap can be closer to the opening of the gap. .
[0009]
Next, in the rotating step, the processing member is rotated so that the portions pressed by the pressing means are sequentially pushed into the gap by the inserting means. That is, in this step, the portion of the snap ring that contacts the pressing means and the insertion means is moved relatively to the snap ring.
[0010]
Then, the portion pressed by the holding means is sequentially pushed into the gap by the insertion means by the above-mentioned rotation. By performing this rotation for about one rotation, the entire ring becomes a ring in the gap. It is pushed down to the position of the groove. Then, the snap ring facing the ring groove is quickly mounted therein.
[0011]
As described above, according to the first aspect, the outer member having the cylindrical portion and the outer member having the outer diameter smaller than the inner diameter of the cylindrical portion and being coaxially arranged in the cylindrical portion so as to protrude from the cylindrical portion. In the processing member including the snapped inner member, the snap ring cannot be shrunk in advance and inserted into the ring groove formed on the inner peripheral surface of the cylindrical portion, so that the snap ring can be easily and smoothly mounted. A snap ring can be attached.
[0012]
The second invention includes an outer member having a cylindrical portion, and an inner member having an outer diameter smaller than the inner diameter of the cylindrical portion and coaxially arranged in the cylindrical portion so as to protrude from the cylindrical portion. An apparatus for inserting a snap ring into a ring groove formed on an inner peripheral surface of the cylindrical portion by pushing a snap ring into a gap between the cylindrical portion and the inner member with respect to a processing member,
A rotary table for mounting the processing member with the opening of the gap facing upward and rotating the processing member about the axis of the cylindrical portion;
An insertion portion for pushing the snap ring to a position of the ring groove in the gap;
A snap ring insert device comprising: a pressing portion for pressing a portion of the snap ring not inserted into the gap toward an opening of the gap (claim 2).
[0013]
The snap ring insert device according to the second invention has the rotary table, the insertion section, and the holding section. Therefore, the above-described excellent insert method (first invention) can be reliably performed.
That is, first, the processing member is placed on the rotary table with the opening of the gap facing upward, and is held rotatable about the axis of the cylindrical portion. Next, only a part of the snap ring is pushed into the ring groove by the insertion portion.
[0014]
If only a part of the snap ring is pushed into the gap, the angle of inclination of the snap ring from the portion pushed into the gap to the portion not pushed is increased. If the angle of inclination increases, the snap ring cannot be inserted into the ring groove.
[0015]
Here, the snap ring insert device has the holding portion. A portion of the snap ring that is not pressed into the gap is pressed toward the opening by using the pressing portion. Accordingly, the inclination angle of the snap ring is suppressed, and the snap ring can be brought closer to the opening.
[0016]
When the rotary table is rotated in this state, the processing member can be rotated while the insertion portion and the pressing portion are in contact with the snap ring. Thus, the other part of the snap ring can be sequentially pushed to the position of the ring groove, triggered by the part inserted into the ring groove of the gap and being inserted into the ring groove. Then, the snap ring pressed into the position of the ring groove over the entire circumference is quickly mounted in the ring groove.
[0017]
Thus, according to the snap ring insert device, the outer member having the cylindrical portion and the outer member having the outer diameter smaller than the inner diameter of the cylindrical portion are coaxially arranged in the cylindrical portion so as to protrude from the cylindrical portion. The snap ring can be easily mounted in the ring groove formed on the inner peripheral surface of the cylindrical portion in the processing member including the inner member.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
In the second aspect, the contact portion between the insertion portion and the holding portion may be in a range of 30 to 70 degrees around the axis of the cylindrical portion of the outer member. It is preferable that they are arranged so as to satisfy (claim 3).
[0019]
In this case, the inclination angle of the snap ring from the portion pushed into the gap to the portion not yet pushed is effectively suppressed, and the snap ring of the portion not pushed into the gap is connected to the opening of the gap. Can be approached.
On the other hand, when the angle is less than 30 degrees, the pressing of the snap ring by the pressing portion is not sufficient, and the inclination angle may not be sufficiently suppressed. If the angle exceeds 70 degrees, the inclination angle may increase due to the curvature between the holding portion and the insertion portion of the snap ring.
[0020]
The insertion portion may be located between a position in contact with the snap ring and a position outside an extension region extending in the axial direction from a substantially cylindrical gap formed between the outer member and the inner member. And the pressing portion is configured to be movable between a position in contact with the snap ring and a position outside the extension region.
The pressing portion changes its position in conjunction with the insertion portion, and when the insertion portion is at a position in contact with the snap ring, the pressing portion also contacts the snap ring, and the insertion portion is in the extended area. It is preferable that the pressing portion is located outside the extension region when the pressing portion is outside the extension region.
[0021]
In this case, since the insertion portion and the pressing portion can be moved outside the extension region extending in the axial direction from the substantially cylindrical gap formed between the outer member and the inner member, the snap ring is provided. In carrying out the insertion work, the mounting of the snap ring on the snap ring insert device can be easily performed.
Further, when the holding portion is configured to change its position in conjunction with the insertion portion, the snap ring insert can be easily operated only by operating either the holding portion or the insertion portion. The device can be operated.
[0022]
Preferably, the insertion portion is provided at a tip of a clamp arm of the toggle clamp.
Here, the toggle clamp is a clamp device having a link structure including a clamp arm having a force point for clamping and a lever arm having an action point for applying an operating force. In this toggle clamp, when the lever arm is operated to bring the clamp arm into a clamped state, the force point can maintain a large clamping force even if the operation force on the action point is removed.
[0023]
When the insertion portion is disposed at the tip of the clamp arm, once the insertion portion is in a state where the snap ring can be pushed into the gap, the lever arm is continuously operated. No need to do. That is, the state of the insertion portion is maintained by the action unique to the toggle clamp.
[0024]
【Example】
(Example 1)
A snap ring insert device 1 and a snap ring insert method according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the snap ring insert device 1 of this embodiment includes an outer member 53 having a cylindrical portion 531, an outer diameter smaller than the inner diameter of the cylindrical portion 531, and the cylindrical portion 531 protruding from the cylindrical portion 531. The snap ring 60 is pushed into the gap 533 between the cylindrical portion 531 and the inner member 51 with respect to the processing member 5 including the inner member 51 disposed coaxially within 531, and is formed on the inner peripheral surface of the cylindrical portion 531. This is a device for mounting the snap ring 60 in the ring groove 532.
[0025]
As shown in FIG. 1, the snap ring insert device 1 is provided with a rotating member for mounting the processing member 5 with the opening 52 of the gap 533 facing upward and rotating the processing member 5 about the axis of the cylindrical portion 531. The table 40, the insertion portion 11 for pushing the snap ring 60 to the position of the ring groove 532 in the gap 533, and the portion of the snap ring 60 not pushed into the gap 533 toward the opening 52 of the gap 533. And a pressing portion 21 for pressing.
[0026]
The snap ring insert method performed using the snap ring insert device 1 is a method including a ring setting step, a ring inserting step, and a rotating step.
The ring setting step is a step of arranging the snap ring 60 on the opening 52 of the gap 533 of the processing member 5.
[0027]
In the ring insertion step, one end of the snap ring 60 is pushed into the gap 533 by using the insertion portion 11, and a portion that is not pushed into the gap 533 of the snap ring 60 by the holding section 21 is opened. This is a step of pressing the member toward the part 52.
Further, the rotation step is a step of rotating the rotary table 40 so that the portions pressed by the pressing unit 21 are sequentially pushed into the gap 533 by the insertion unit 11. The details will be described below.
[0028]
First, the processing member 5 and the snap ring 60 applied to this embodiment will be described. As shown in FIG. 1, the processing member 5 is a member in which an outer member 53 and an inner member 51 are coaxially arranged.
The outer member 53 has a substantially cylindrical hollow portion in at least a part of its axial direction, and the hollow portion forms a cylindrical portion 531. Further, a ring groove 532 for mounting the snap ring 60 is provided on the inner peripheral surface of the cylindrical portion 531.
[0029]
As shown in FIG. 1, the inner member 51 is a substantially columnar member having an outer diameter smaller than the inner diameter of the cylindrical portion 531 of the outer member 53. In addition, a part in the axial direction has a step portion 515 and a constricted portion 516 that fit into the cylindrical portion 531 of the outer member 53, and both are connected via a shelf surface 518. When the outer member 53 and the inner member 51 are arranged coaxially, the position of the shelf surface 518 is the edge of the ring groove 532 in the axial direction, which is on the side of the step 515. It is configured so as to approximately match.
[0030]
When the outer member 53 and the inner member 51 are arranged coaxially and the snap ring 60 is mounted in the ring groove 532, the end face of the snap ring 60 and the flat surface 518 of the inner member 51 are aligned. It is configured to abut. In this way, the processing member 5 is configured so that the inner member 51 can be firmly fixed to the outer member 53.
[0031]
As shown in FIG. 5, the snap ring 60 is a substantially circular ring-shaped member made of a plate-shaped material made of a high-hardness wire such as SWRH72A, and has an abutment 61 whose ends face each other. . The snap ring 60, which is narrower in width than the outer diameter, is configured to be able to expand and contract the gap between the abutments 61. When the gap between the abutments 61 is reduced and the outer diameter thereof is restrained to be small, the snap ring 60 is configured to exert a spring force to expand outward.
[0032]
As shown in FIG. 1, the snap ring 60 that is not subjected to any external force has an outer diameter larger than the inner diameter of the cylindrical portion 531 of the outer member 53. On the other hand, when the snap ring 60 is shrunk in the inner diameter direction and the ends thereof come into contact with each other so that the gap between the abutments 61 becomes zero, the outer diameter thereof is smaller than the inner diameter of the cylindrical portion 531. is there.
That is, the snap ring 60 of the present embodiment can be firmly fixed by generating a spring force for expanding the gap of the abutment 61 when the snap ring 60 is mounted on the inner peripheral surface of the cylindrical portion 531 of the outer member 53. is there.
[0033]
As shown in FIGS. 1 and 2, the snap ring insert device 1 includes a rotary table 40 for rotating the processing member 5 and an insertion portion 11 for pushing a part of the snap ring 60 into the gap 533. And a pressing portion 21 for pressing a portion of the snap ring 60 that has not been inserted into the ring groove 532.
[0034]
As shown in FIGS. 1 and 2, the rotary table 40 is a table that is rotatably mounted on the base 30 that forms the base of the snap ring insert device 1 and that mounts the processing member 5. On the table surface 41 of the rotary table 40, a positioning convex ring (not shown) having an inner diameter slightly larger than the outer diameter of the processing member 5 is provided. The convex ring is formed around the rotation axis of the turntable 40 as its center.
[0035]
As shown in FIGS. 1 and 2, the insertion portion 11 is a convex pin disposed at the tip of the clamp arm 13 of the toggle clamp 10 disposed on the base 30, and can be inserted into the gap 533. It is configured as follows.
As shown in FIGS. 1 and 3, the toggle clamp 10 has a link structure including a lever arm 12 for operating the insertion portion 11, a clamp arm 13 having the insertion portion 11, and an intermediate arm 14, and a clamp base. 15 attached.
[0036]
Here, as shown in FIGS. 1 and 3, the intermediate arm 14 and the clamp arm 13 are configured to be rotatably supported on the clamp table 15 by the first fulcrum 101 and the third fulcrum 103, respectively. Further, the lever arm 12 is configured to be rotatably supported by the intermediate arm 14 and the clamp arm 13 by a first fulcrum 101 and a fourth fulcrum 104, respectively.
[0037]
Further, as shown in FIGS. 2 and 4, a cam arm 132 is attached to a side surface of the clamp arm 13 so as to be rotatable around an axis perpendicular to the side surface. At the end of the cam arm 132, a cam 133 described later is further provided.
As shown in FIGS. 1 and 2, the pressing portion 21 is configured so that a portion of the snap ring 60 that has not yet been pressed into the gap 533 can be pressed toward the opening 52. The holding section 21 is attached via a holding section arm 22 so as to be rotatable around a rotating shaft 23 disposed substantially perpendicular to the table surface 41.
[0038]
Further, as shown in FIGS. 2 and 4, the pressing arm 22 has a cam groove 221 with which the cam 133 at the tip of the cam arm 132 is engaged. Then, by the engagement between the cam 133 and the cam groove 221, the holding portion arm 22 including the holding portion 21 is configured to rotate around the rotation shaft 23 in accordance with the movement of the insertion portion 11. .
[0039]
When the insertion portion 11 is inserted into the gap 533, the holding portion 21 is configured to move to a position close to the opening 52.
As shown in FIG. 2, when the pressing portion 21 and the insertion portion 11 are in contact with the snap ring 60, the angle between them and the center of the axis of the cylindrical portion 531 is 45 degrees. It is located in.
[0040]
In inserting the snap ring 60 using the snap ring insert device 1 configured as described above, first, the processing member 5 is placed on the rotary table 40 and the snap ring 60 is placed on the gap 533. A ring setting step for mounting is performed.
Here, first, the processing member 5 is placed inside the convex ring on the table surface 41 so that the rotation axis of the rotary table 40 and the axis of the cylindrical portion 531 coincide with each other.
[0041]
As shown in FIG. 2, the snap ring 60 is mounted so that the portion of the snap ring 60 pressed by the insertion portion 11 and the portion pressed by the pressing portion 21 substantially coincide with the opening 52 of the processing member 5. Place. At this time, the mounting position of the snap ring 60 is adjusted so that one end of the snap ring 60 from the contact position of the insertion portion 11 to the abutment can be pushed into the gap 533.
[0042]
Next, a ring insertion step is performed in which one end of the snap ring 60 is pushed into the gap 533 by the insertion portion 11 and a portion not yet pushed into the gap 533 is pushed by the holding portion 21 toward the opening 52.
Here, first, as shown in FIGS. 1 and 3, of the ends of the lever arm 12, the end opposite to the toggle clamp 10 is pushed down to the base 30 side, and the link constituting the toggle clamp 10 is formed. Work structure.
[0043]
As shown in FIGS. 1 and 3, the lever arm 12 pushed down to the base 30 rotates about the second fulcrum, and moves the fourth fulcrum 104 on the basis of the lever using the second fulcrum as a fulcrum. Push up to the side opposite to the base 30. At this time, the second fulcrum connected to the intermediate arm 14 moves toward the processing member 5 as the intermediate arm 14 rotates around the first fulcrum 101.
[0044]
Further, the clamp arm 13 connected to the lever arm 12 by the fourth fulcrum 104 pushes up the fourth fulcrum 104 and rotates clockwise around the third fulcrum 103. Then, the insertion portion 11 provided at the tip of the clamp arm 13 moves toward the gap 533 of the opening 52 of the processing member 5 as shown in FIG. Then, the insertion portion 11 comes into contact with the snap ring 60 set in the opening 52, and further pushes the one end portion including the contact portion of the snap ring 60 into the gap 533.
[0045]
At this time, the clamp arm 13, the lever arm 12, and the intermediate arm 14, which constitute the link structure of the snap ring 60, are arranged as shown in FIG. In such an arrangement, it is difficult to push up the insertion portion 11 by applying a force to the insertion portion 11 due to an action unique to the toggle clamp 10. Therefore, even after the operation force applied to the lever arm 12 is removed, the insertion portion 11 can maintain the pushed state with respect to the snap ring 60.
[0046]
Further, as described above, when the insertion portion 11 moves so as to come into contact with the snap ring 60, the cam of the cam arm 132 connected to the clamp arm 13 becomes the cam of the holding portion arm 22 as shown in FIGS. The groove 221 moves. Then, the holding portion arm 22 rotates around the rotation shaft 23 by the engagement between the cam and the cam groove 221. Then, the pressing portion 21 disposed at the tip of the pressing portion arm 22 approaches the opening 52 of the processing member 5 as shown in FIG.
The pressing portion 21 presses a portion of the snap ring 60 that has not yet been pushed into the gap 533 toward the opening 52, and adjusts the inclination angle of the snap ring 60 from the portion pushed into the gap 533 to the portion that has not been pushed. Suppress.
[0047]
Next, a rotation step of rotating the turntable 40 so that the portions pressed by the pressing portions 21 are sequentially pushed into the gaps 533 by the insertion portions 11 is performed. In this step, the state of the link structure of the toggle clamp 10 operated in the above-described ring insertion step is maintained. That is, the rotation step is performed while maintaining a state in which a part of the snap ring 60 is pressed into the gap 533 by the insertion part 11 and a part not pressed into the gap 533 is pressed by the pressing part 21.
[0048]
In this step, the turntable 40 on which the processing member 5 is placed is rotated. Since the axis of the processing member 5 and the rotation axis of the rotary table 40 are substantially aligned, the processing member 5 rotates about the axis. At this time, in a state where the pressing portion 21 and the insertion portion 11 are in contact with the snap ring 60, the pressing portion 21 is rotated in a direction from the pressing portion 21 to the insertion portion 11.
[0049]
Rotating the rotary table 40 in the above direction is equivalent to sequentially feeding the portion of the snap ring 60 that contacts the pressing portion 21 to the insertion portion 11 side. Then, the portion of the snap ring 60 pressed by the pressing portion 21 can be sequentially pushed down to the position of the ring groove 532 in the gap 533. When the processing member 5 is rotated by about 360 degrees, the snap ring 60 is pushed all the way to the position of the ring groove 532. As a result, the snap ring 60 is mounted in the ring groove 532, and firmly fixes the outer member 53 and the inner member 51 in the axial direction.
[0050]
As described above, according to the snap ring insert method implemented using the snap ring insert device 1 in the present embodiment, the snap ring insert method includes the outer member 53 and the inner member 51 and is formed between the two. In the processing member 5 including the gap 533, the snap ring 60 can be very efficiently and smoothly attached to the ring groove 532 in the gap 533.
Further, according to the snap ring insert method of the present embodiment, the operation of mounting the snap ring 60 can be performed very smoothly and efficiently. Further, no excessive force acts on the processing member 5 or the like during the work.
[0051]
Note that a rotating ball may be provided at the tip of the insertion section 11. Further, as the pressing portion 21, a rotating roller having a roller surface facing the gap 533 may be provided, and the snap ring 60 may be pressed by the rotating roller. In this case, in the rotation process, the frictional resistance between the insertion portion 11 and the pressing portion 21 and the snap ring 60 is reduced, so that the rotation process can be performed more smoothly.
[0052]
In this embodiment, the insertion portion 11 is provided on the clamp arm 13 of the toggle clamp 10. However, a simple lever structure or the like may be used instead of the toggle clamp 10. In this case, it is necessary for the operator to continue the operation of the lever structure or the like so that the insertion portion 11 can continue to push the snap ring 60 during the rotation process. However, there is an advantage that the snap ring insert device 1 can have a simpler structure.
[0053]
(Example 2)
This embodiment is an example in which the structure for holding the insertion portion 11 and the holding portion 21 of the first embodiment is changed.
As shown in FIGS. 6 and 7, in the snap ring insert device 1 of the present embodiment, the insertion portion 11 and the pressing portion 21 are attached to a bridge bar 131 provided at the tip of the clamp arm 13 of the toggle clamp 10.
Therefore, the snap ring insert device 1 can bring the insertion portion 11 and the pressing portion 21 into contact with the snap ring 60 only by operating the clamp arm 13.
The other configuration and operation and effect are the same as those of the first embodiment.
[Brief description of the drawings]
FIG. 1 is a side view showing a state in which a snap ring is inserted by a snap ring device according to a first embodiment.
FIG. 2 is a top view showing a state in which a snap ring is inserted by a snap ring device in the first embodiment.
FIG. 3 is a side view showing the snap ring device according to the first embodiment.
FIG. 4 is a top view showing the snap ring device according to the first embodiment.
FIG. 5 is a top view showing the snap ring in the first embodiment.
FIG. 6 is a side view showing a toggle clamp according to the second embodiment.
FIG. 7 is a top view showing a toggle clamp according to a second example.
[Explanation of symbols]
1. . . Snap ring insert device,
10. . . Toggle Clamps,
11. . . Insertion section,
12. . . Lever arm,
13. . . Clamp arm,
15. . . Clamp table,
21. . . Holding part,
22. . . Holding part arm,
221. . . Cam groove,
30. . . base,
40. . . Rotating table,
41. . . Table surface,
5. . . Processing material,
51. . . Inner member,
52. . . Aperture,
53. . . Outer member,
531. . . Cylindrical part,
532. . . Ring groove,
60. . . Snap ring,

Claims (5)

For a processing member including an outer member having a cylindrical portion, and an inner member having an outer diameter smaller than the inner diameter of the cylindrical portion and coaxially disposed in the cylindrical portion so as to protrude from the cylindrical portion, A method for fitting a snap ring into a ring groove formed on an inner peripheral surface of the cylindrical portion by pushing a snap ring into a gap between the cylindrical portion and the inner member,
A ring setting step of disposing the snap ring on the opening of the gap of the processing member;
A ring inserting step of pushing one end of the snap ring into the gap by using insertion means and pressing a portion of the snap ring not inserted into the gap by the holding means toward an opening of the gap; ,
A rotating step of rotating the processing member so that portions pressed by the holding means are sequentially pushed into the gap by the inserting means. For a processing member including an outer member having a cylindrical portion, and an inner member having an outer diameter smaller than the inner diameter of the cylindrical portion and coaxially disposed in the cylindrical portion so as to protrude from the cylindrical portion, An apparatus for pushing a snap ring into a gap between a cylindrical portion and the inner member to mount the snap ring in a ring groove formed on an inner peripheral surface of the cylindrical portion,
A rotary table for mounting the processing member with the opening of the gap facing upward and rotating the processing member about the axis of the cylindrical portion;
An insertion portion for pushing the snap ring to a position of the ring groove in the gap;
A pressing portion for pressing a portion of the snap ring that is not inserted into the gap toward an opening of the gap. In the second aspect, the contact portion between the insertion portion and the pressing portion and the snap ring is in a range of 30 degrees to 70 degrees around the axis of the cylindrical portion of the outer member. A snap ring insert device characterized by being arranged in a. 4. The extension portion according to claim 2, wherein the insertion portion extends in a direction axially extending a position in contact with the snap ring and a substantially cylindrical gap formed between the outer member and the inner member. 5. The holding portion is configured to be movable between a position in contact with the snap ring and a position outside the extension region. ,
The pressing portion changes its position in conjunction with the insertion portion, and when the insertion portion is at a position in contact with the snap ring, the pressing portion also contacts the snap ring, and the insertion portion is in the extended area. The snap ring insert device according to claim 1, wherein the holding portion is located outside the extension region when the holding ring is outside the extension region. 5. The snap ring insert device according to claim 2, wherein the insertion portion is provided at a tip of a clamp arm of the toggle clamp.

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