JPH1119883A - Snap ring fitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly and securely fit a snap ring by providing a hammering part, which receives the reciprocating movement of an impact part and which places a supported snap ring. SOLUTION: A fitting part 1 is formed of a support part 10 for supporting a snap ring S, a magnetic body part 20 for attracting a curved surface of the snap ring S at an outside vertex part Sb of a circular, a hammering part 30 for placing a bent part Sa of the snap ring S, and a guide part for holding the hammering part 30. Piston pushing force is increased till it get over the elastic force of a coil spring 68, and pushing of a piston 61 is started again. Continuous striking power is given to the hammering part 30 by this repeated phenomenon, and the snap ring S is fitted in a fitting groove Wa.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circlip fitting device for fitting a circlip into a fitting groove of a mounted member to mount and fix the mounted member to the mounted member.

[0002]

2. Description of the Related Art A circlip is a spring ring having a notch portion for fitting and having a curved portion around the notch portion, and has various shapes such as E-shape, U-shape and U-shape. There is a shape. These circlips are used by fitting the notch from a side direction into a fitting groove provided in a member to be mounted.

A conventional circlip mounting device is disclosed in Japanese Utility Model Laid-Open No. 63-94677 and Japanese Utility Model Laid-Open No. 5-77772.
The technology described in Japanese Patent Application Laid-Open Publication No. H11-146131 is already known. The technique described in Japanese Utility Model Laid-Open No. 63-94677 (hereinafter referred to as Conventional Example 1) will be described with reference to FIG. In the circlip mounting device B, the circlip S is fitted into the fitting groove Wa by a manual pinching action. A pair of arms 81 and 81 ′ are connected by a fulcrum 82, and the tip of one of the arms 81. The groove 83 is cut so as to add to the bent portion Sa of the circlip S. Also, the arm 8
The other end of 1, 81 'forms a gripping portion 84, and the front end performs a pinching operation by gripping the gripping portion 84. Next, the technique described in Japanese Utility Model Laid-Open No. 5-77772 (hereinafter referred to as Conventional Example 2) will be described with reference to FIG. This circlip mounting device C also manually fits the circlip S into the fitting groove Wa similarly to the above, and includes a positioning portion 91 for positioning the mounted member W at a predetermined position, and a circlip S by leverage. And an operating portion 92 for pushing the actuator into the fitting groove Wa. By manually applying a pressing force to the operating portion 92, the circlip S can be fitted into the fitting groove Wa.

[0004]

The above-mentioned known techniques are as follows.
In each case, the mounting work is performed manually, which is inefficient and has many inconveniences in the work. In particular, when performing a continuous circlip mounting operation in the production process of the line, quickness and reliability are required, but in the conventional example 1, continuous operation is difficult and at the same time skill is required for the operation. Also, there were many failures in installation. Further, Conventional Example 2 is convenient in that a circlip is fitted in a plurality of members to be mounted in advance and is made and stored in advance in order to improve the operability, but a bracket or the like in which the mounting member is already mounted on the vehicle body. In this case, it is inconvenient because the brake hose cannot be used for attaching a brake hose or the like as a member to be attached to a bracket or the like and fitting a circlip.

To solve the above problems, a hand-held automatic device having a drive source can be considered, but it is structurally difficult to apply the above-mentioned known technology. Furthermore, since the circlip is a very small member, handling is troublesome, and there have been many failures such as being fitted upside down. The inventor has created the following invention in order to solve the above problems.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a circlip mounting apparatus according to the present invention is provided with an impact which reciprocates forward and backward by the action of compressed air, the reaction of elastic members, and the intermittent discharge of compressed air. A pneumatic tool part that generates a hitting force by a part, a support part that supports the circlip according to the shape of the circlip, and a hammering part that strikes the supported circlip by receiving the reciprocating movement of the impact part. And a guide part for holding the hammering part so as to be able to advance and retreat, and a fitting part comprising a magnetic body part which abuts on a curved top part of the circlip supported by the support part and is attracted. Further, the fitting portion is detachable from the pneumatic tool portion, and a plurality of types of fitting portions corresponding to various shapes of circlips can be replaced and exchanged.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A circlip serves as a fastener for attaching and fixing an attachment member to an attachment member, and is fitted into a fitting groove between the attachment member (for example, a brake hose) and the attachment member. The circlip clamps and fixes the mounting member (for example, a bracket). The present invention is an apparatus for semi-automatically fitting a circlip into a fitting groove by the action of a pneumatic tool part and a fitting part using compressed air. Hereinafter, an embodiment of a circlip attaching device for fitting a circlip having a U-shaped rear end bent and curved on both sides in a certain direction will be described with reference to the drawings.

FIGS. 1 (a) and 1 (b) show the fitting portion 1
FIG. 3B is an exploded perspective view, and FIG. 4B is a diagram viewed from the direction of arrow D in FIG. The fitting portion 1 will be described with reference to FIG.
The fitting portion 1 includes a support portion 10 for supporting the circlip S, and a magnetic body portion 2 that adsorbs a curved surface of the circlip S at an outer vertex (hereinafter referred to as a curved top) Sb of an arc.
0, a hammering portion 30 for hitting the bent portion Sa of the circlip S, and a guide portion on which the hammering portion 30 is held.

A plate-like body 11 is provided in front of the support portion 10, and a circlip S is mounted and supported on the back surface of the plate-like body 11. Therefore, a mounting groove 12 having an open front is formed on the back surface of the plate-like body 11 as shown in FIG. The reason why the circlip S is formed so that the front is opened is to slide the circlip S forward by hammering a hammering portion 30 described later. Further, a notch 11a corresponding to the notch shape of the circlip S is formed at the front end of the plate-like body 11, and the plate-like body 11 interferes with the brake hose W as a member to be attached during the fitting operation. To prevent them from getting lost. further,
A semi-cylindrical groove 13 is formed on the rear side of the back surface, and the advancing and retreating movement of the hammering section 30 is guided from above.

The plate 11 is covered by a guide member. As shown in FIG. 1A, the guide member includes an inverted concave cover 41 and a stopper 42 for holding the hammering portion 30 so as to be able to move forward and backward. The cover portion 41 covers the plate-like body 11 from above, and the stopper member 42 sandwiches the hammering portion 30 from below with the plate-like body 11. Cover part 41
The stop member 42 is fixed by screws 44 with the plate-shaped body 11 interposed therebetween. Guide groove 43 formed in stop member 42
Engages with the bottom surface 33a of the hammering unit 30, and suppresses rotation while guiding the advancing and retreating of the hammering unit 30. In addition, in front of the cover portion 41, the above-described plate-like body 11 is provided.
A notch 41a is formed at a position corresponding to the notch 11a, and a wide step groove 41 for fitting a bracket X as a mounting member is formed at a lower end of both side walls of the cover 41.
b is provided.

On the rear side of the support portion 10, a columnar main body portion 15 is formed integrally with the plate-like body 11 via a tapered portion 14. The main body 15 and the tapered portion 14 have through holes 16 (FIG. 1B) through which the hammering portion 30 is inserted and held.
), A tail hole 17 into which the tail portion 32 of the hammering portion 30 is inserted, and a fitting hole 18 into which the tip of the pneumatic tool portion 2 is fitted. The above-described guide portion includes the semi-cylindrical groove 13 provided in the plate-like body 11, the guide groove 43 of the stopper member 42, the through hole 16, and the tail hole 17.

The hammering section 30 has a hitting section 3 at its tip.
1. A tail part 32 is formed at the rear end, and a pillar part 33 connecting the front and rear ends has a columnar shape in which a bottom surface 33a is cut out in a planar shape. The striking portion 31 has two stages, and the upper portion 31a strikes the bent portion Sa of the circlip S, and the lower portion 31
b contacts the bracket X when the mounting of the circlip S is completed, thereby preventing unnecessary hitting to the circlip S (see FIG. 2). The tail part 32 is formed in a disk shape having a larger cross-sectional radius than the support part 33, and reliably and efficiently transmits the hit by the intermediate rod 64 in the pneumatic tool part 2 described later to the hitting part 31, and the hammering part 30 falls off. To prevent As described above, the hammering portion 30 is provided on the support portion 3.
3 is held in the through hole 16, and the tail 32 is inserted into the tail hole 17 and is hooked on the step with the through hole 16 (see FIG. 2).

The shapes of the support portion 10 and the hammering portion 30 constituting the fitting portion 1 are not limited to the above-described examples, and it is sufficient that the striking from the pneumatic tool portion 2 can be transmitted to the circlip S as a pressing force. Therefore, the support portion 10 corresponding to various circlips S (for example, E-shape, U-shape, U-shape, etc.) can be formed, and the support portion 33 of the hammering portion 30 is formed to have a polygonal cross section. You can also.

Next, the magnetic member 20 will be described. In the present embodiment, a cylindrical permanent magnet is embedded and mounted on the mounting groove 12 of the support portion 10, and the lower end is mounted on the circlip S.
Is brought into contact with the curved top Sb to be sucked. By this suction, the circlip S can be carried to the brake hose W while being mounted in the mounting groove 12. Further, even if the circlip S is to be mounted upside down, the circlip S does not come into contact with the lower end because a curved portion is formed on both sides thereof, so that a gap is generated. As a result, the circlip S is in the magnetic portion 2
By the action of the magnetic force of 0, the two points on the back side of the curve are repelled with the same polarity of magnetism, and detached from the mounting groove 12. According to the above-described operation, it is possible to prevent the circlip S from being erroneously attached to the front and back surfaces and to prevent the circlip S from being inserted incorrectly.

Next, the structure and operation of the pneumatic tool portion 2 will be described with reference to FIG. By the way, FIG.
FIG. 2B is a schematic view showing a state in which a circlip S is mounted on the horn and carried to the fitting groove Wa before pressing the lever 52. FIG. It is the schematic of the state which is performing. Further, FIG.
The solid arrow in the middle indicates the direction of movement of the impact portion, and the dotted arrow indicates the flow path of the compressed air. The pneumatic tool portion 2 is provided with a lever 52 that rotates with the base end as a fulcrum, and a pressing force transmitting member 53 is mounted on the base end side of the lever 52. The pressing force transmitting member 53 penetrates the side wall of the pneumatic tool main body 75, and its tip abuts on a spherical valve 57 in a cylindrical first air flow path (hereinafter, referred to as a first flow path) 54.

An air supply port 55 is provided on a side surface of the first flow passage 54, and a second air flow passage (hereinafter, referred to as a second flow passage) 56 is provided on an upper side surface thereof. The spherical valve 57 is supported by a spring 74 from below in a state of being in close contact with the first channel side surface, and is positioned by the pressing force transmitting member 53. The lever 52 of FIG.
In the state where no pressing force is applied, the spherical valve 57 is positioned between the air supply port 55 and the second flow path 56 by the action of the stopper 58. In this position, the first flow path 55 is closed and no compressed air flows.

When the spherical valve 57 is depressed by applying a pressing force to the lever 52, the spherical valve 57 is moved to the air supply port 5 as shown in FIG.
5, the first flow path 54 is opened, and the compressed air flows from the air supply port 55 to the second flow path 56. Second
The compressed air flowing into the flow path 56 flows into the cylinder chamber 59 and pushes the piston 61 as it is. Further, the compressed air is sent into the flow channel 62 provided in the piston 61, but the outlet 63 of the flow channel 62 is provided on the side surface of the piston 61, so the piston wall 60 seals the outlet 63. The space does not flow.

When the piston 61 is pushed in, the tip comes into contact with the intermediate rod 64. The intermediate rod 64 is held by a guide wall 65 so as to be able to move forward and backward. Further, a flange 64a that is hooked on the intermediate wall 66 is provided in the middle of the intermediate rod 64 to prevent jumping. A coil spring 68, which is an elastic member, is provided in the intermediate chamber 77 provided with the flange 64a. The coil spring 68 has a proximal end fixed to the guide wall 65 and a distal end fixed to the flange 64a, and urges the intermediate rod 64 in a direction of pushing back. Therefore, when the piston 61 is pushed, the intermediate rod 64 is also pushed against the elastic force of the coil spring 68, and as a result,
The tip of the intermediate rod 64 comes into contact with the tail 32 of the hammering section 30 described above, and pushes the hammering section 30.

As the piston 61 is pushed by the compressed air, the outlet 63 of the piston 61 leaves the interference of the piston wall 60 and reaches the discharge chamber 69. Then, the discharge chamber 69
Compressed air leaks to the outside from the external discharge port 70 provided on the side wall of the piston 61, and the pushing force of the piston 61 decreases. As a result, the pushing force is defeated by the elastic force of the coil spring 68 and pushed back in the opposite direction. When the push-back proceeds and the outlet 63 is interfered by the piston wall 60 and is closed again, the push-in force increases again. As a result, the pushing force of the piston 61 increases until it overcomes the elastic force of the coil spring 68, and the pushing of the piston 61 starts again. The above pushing and pushing operations are repeated as long as the first flow path 54 is opened, and a semi-automatic repetitive phenomenon continues to occur. Due to this repetitive phenomenon, a continuous impact pressing force is applied to the hammering portion 30, and the circlip S is fitted into the fitting groove Wa. In the present embodiment, the piston 61 and the intermediate rod 64 correspond to an impact part. Also, the compressed air acts as a push, and the piston 61 acts as a pushback. Further, the compressed air is intermittently discharged due to the positional relationship between the discharge port 63 and the piston wall 60.

In FIG. 2, reference numeral 71 denotes a cushion for reducing the impact of the pushed-back piston 64 hitting the side wall of the cylinder chamber 59 to promote repetitive movement, 72 denotes an O-ring for preventing air leakage, and 73 denotes an O-ring. A release groove for air release, 76 indicates a cylinder. Further, in the present embodiment, the guide wall portion 65 is screwed to the pneumatic tool body 75 and fixed integrally therewith. The embodiment of the pneumatic tool portion 2 has been described above. However, the present invention is not limited to the above-described embodiment. For example, a leaf spring or a rubber-like member may be used as the elastic member attached to the intermediate rod 64.

The circlip mounting device A described above
The pneumatic tool part 2 is fitted into the fitting part 1
8a. However, the present invention is not limited to the above embodiment, and the fitting portion 1 and the pneumatic tool portion 2 can be integrally manufactured from the beginning. Alternatively, the hammering portion 30 may be formed at the tip of the intermediate rod 64, and the intermediate rod 64 and the hammering portion 30 may be manufactured integrally. Further, a plurality of types of fitting portions 1 corresponding to a plurality of types of circlips S may be manufactured in advance, and even if the type of the circlip S changes, the work can be performed only by replacing the fitting portion 1.

Next, a method of using the circlip mounting device A will be described with reference to an example in which a brake hose W is mounted on a bracket X in an automobile manufacturing line. In this case, the brake hose W is a member to be mounted, and the bracket X corresponds to a mounting member.

In carrying out the above-described operation, first, the circlip S is mounted on the support of the circlip mounting device A and is prepared. In this preparatory stage, the inside-out mounting can be prevented by the action of the magnetic body portion, and the simple mounting is possible. Next, the operator takes out the brake hose from the component supply location, inserts the fitting portion of the brake hose with one hand into a bracket through hole attached to the tire housing of the vehicle flowing by the transport device, and prepares it. continue,
While holding the pneumatic tool portion 2 of the circlip mounting device A with the other hand, the notch portion of the guide member is brought into contact with the side of the bracket, and the notch portion of the plate-like body 11 is fitted to the brake hose (FIG. 2 ( a)). Then, the lever of the pneumatic tool portion 2 is pressed to apply a hitting force to the hammering portion 30, and the circlip S is fitted into the fitting groove Wa (see FIG. 2B). As described above, the circlip S is securely inserted only by pressing the lever by pressing the notch of the guide member to the bracket and pressing the lever.
Can be fitted into the fitting groove Wa of the brake hose W.

[0024]

As described above, according to the circlip mounting apparatus of the present invention, operability can be improved with a simple structure, and work efficiency can be improved. In particular, even when performing a continuous circlip mounting operation in a line manufacturing process, the operation can be performed quickly and reliably, and skill is not required. Further, it is possible to prevent a failure that the front and back of the circlip are fitted in reverse. Furthermore, it is economical if a plurality of types of mounting parts are manufactured and made replaceable.

[Brief description of the drawings]

FIG. 1A is an exploded perspective view of a fitting portion 1;
(B) is an exploded perspective view seen from the direction D in (a).

FIG. 2 is a sectional view of a circlip mounting device A,
(A) is a schematic diagram before operation, and (b) is a schematic diagram during operation.

FIG. 3 is a schematic side view of Conventional Example 1.

FIG. 4 is a schematic perspective view of a second conventional example.

[Explanation of symbols]

 S: circlip W: brake hose (attached member) X: bracket (attachment member) A: circlip attaching device according to the present invention B: circlip attaching device according to Conventional Example 1 C: circlip according to Conventional Example 2 Mounting device 1: Fitting part 10: Support part 20: Magnetic part 30: Hammering part 2: Pneumatic tool part 60: Piston wall 61: Piston 64: Intermediate rod 68: Coil spring (elastic member) 69: Discharge chamber 70 : External outlet

Claims (2)

[Claims] 1. A circlip mounting device for fitting a circlip into a circlip fitting groove, wherein the impact portion reciprocates forward and backward by an action by compressed air, a reaction by an elastic member, and an intermittent discharge of compressed air. A pneumatic tool part that generates a striking pressing force, and a support part that supports the circlip according to its shape,
A hammering portion that strikes the supported circlip in response to the reciprocating movement of the impact portion, a guide portion that holds the hammering portion so as to be able to move forward and backward, and a curved top portion of the circlip supported by the support portion. And a fitting part comprising a magnetic body part which abuts and adsorbs. 2. The method according to claim 1, wherein the fitting portion is detachable from the pneumatic tool portion, and a plurality of types of fitting portions corresponding to various shapes of circlips are exchangeable and replaceable. A circlip mounting device as described.