JPH0432181Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is used to check whether a clip used to prevent the removal of a hollow piston pin or a link mechanism pin is securely fitted into a groove. Regarding the device.

(Prior Art) Conventionally, it has been necessary to visually check each clip to determine whether or not the clip is inserted into the groove.

(Problems to be solved by the invention) In the above-mentioned visual inspection method, in order to see the clips on both sides, the piston must be rotated half a turn to look at both sides of the piston, which is difficult to see because the clips are small, and is inefficient. It was hot.

The present invention makes it possible to check whether the clip is fitted by looking only from one side of the piston and without looking directly at the clip.

(Means for Solving the Problems) The present invention provides an enlarged diameter portion 12 having a size that engages with one end of the inner diameter side of the hollow pin d, on the front part of the confirmation bar 11 held slidably. Cylindrical part 1 that goes inside d
3 and the slotted part 14 are arranged in succession, and the slotted part 14
The opening/closing pieces 15a, 15b of the wedge 15 can be expanded to a size that engages the other end on the inner diameter side of the hollow pin d.
The desired purpose is achieved by fixing the adjusting pieces 15c and 15d of the wedge 15 to the head 17a of the wedge operating bar 17, which is slidably provided through the confirmation bar 11. It is something to do.

(Function) The confirmation bar 11 is inserted into the work by the hollow pin d.
When inserted into the hollow pin d, the enlarged diameter portion 12 engages with one end portion on the inner diameter side of the hollow pin d.

If the clip e is fitted into the annular groove f, the confirmation bar 11 cannot move any further, but if there is no clip or hollow pin, whether the hollow pin d is pushed out or the tip of the confirmation bar 11 touches the workpiece. The presence or absence of a clip in the annular groove f can be easily confirmed because the clip extends outward from the annular groove f. Next, wedge operation bar 1
7 is moved forward by the spring 21 to expand the wedge 15 and engage the other end on the inner diameter side of the hollow pin d, and when the confirmation bar 11 is pulled back, the clip e is inserted into the annular groove c.
If it is fitted, the confirmation bar 11 cannot move, but if there is no clip or hollow pin, the hollow pin d will be pulled back or the enlarged diameter part 12 will be pulled back to the outside of the workpiece. Therefore, the presence or absence of a clip in the annular groove c can be easily confirmed.

(Example) The drawing shows a device in which the present invention is applied to a device for fitting a retaining clip e of a piston pin d into an annular groove c formed in a through hole b for piston pin insertion of a piston a of an engine. In addition to the clip e, it is also possible to confirm that a clip fitted into another annular groove f and a piston pin d are fitted.

In FIG. 1, 1 is a machine base, 2 is a movable table provided on the machine base 1 so as to be movable forward and backward by a cylinder 2a, and a guide block 3 is mounted on the movable table 2.
is fixedly installed, and as the movable table 2 moves back and forth, the guide block 3 can move toward and away from the piston a. Annular groove c in contact with piston a
An inclined clip insertion groove 4 directed toward the lower end of the guide block 3 is bored in the guide block 3, and a clip input opening 5 connected to the insertion groove 4 is vertically provided.

The clip e is inserted into the annular groove c in the clip insertion groove 4.
A first push-in bar 6 is inserted and reciprocated by a first push-in cylinder 6a fixed to the guide block 3 with a bracket 6b. Clip e
As shown in FIG. 2, the clips have a circular shape with a notch, and are stacked on a cassette bar 9 fixed to the clip inlet 5 leaving a gap through which the clips can pass, and are pressed down by a weight 10. As shown in FIG. 3, the cut portions of the clips e are guided by the ridges 9a of the cassette bar 9, so that when they are pushed into the annular groove c, they all assume the same posture with the cut portions facing down.

Guide hole 7 is inserted so as to intersect with clip insertion groove 4.
A second cylinder 8 is provided, into which a second pusher bar 8 inserts a piston 8a connected to its tail end.
The clip e is driven diagonally by the first push bar 6, and is pushed by the tip of the second push bar 8 to completely fit into the annular groove c. This device was originally applied for in 1983.
It is based on the same principle as the invention of No. 135206.

Next, the fitting confirmation device will be explained. A confirmation bar 11 is slidably held in a guide hole 10 provided in the second push bar 8, and this bar 11 has a tapered enlarged diameter part 12, a cylindrical part 13, and a slotted part 14 in order from the middle part. The slotted portion 14 is provided with 4
One apex of a wedge 15 made of side-shaped links is pivotally connected by a pin 16. Wedge 15 is the fourth
15a, 15b, 15 as shown in FIG.
Consisting of four pieces c and 15d, opening and closing pieces 15a and 15
b, the pin 16 is attached to the slotted part 14 of the confirmation bar 11.
The adjustment pieces 15c and 15d are connected to the confirmation bar 1.
The wedge operating bar 17 is pivotally connected to the head 17a of the wedge operating bar 17 by a pin 18. Slotted part 1
A stopper 19 that limits the rotation angle of the opening/closing pieces 15a, 15b is fixed to the end of the opening/closing piece 4 with a pin 20. A spring 21 is interposed between the head 17a of the wedge operating bar 17 and the confirmation bar 11, and a piston 22a operating within a cylinder 22 is fixed to the other end of the wedge operating bar 17. Grooves 24 and 25 are formed in the second push bar 8 and the confirmation bar 11, and a retaining bolt 26 embedded in the guide block 3 engages to guide and restrict sliding movement. A spring 27 is interposed between the bars.

As shown in FIG. 6, a groove 30 is cut in the middle of the confirmation bar 11, and the bar 11 is cut into an elongated hexagonal shape so that the opening leg of the clip e can pass therethrough.

Next, we will discuss the work to confirm that the clip is inserted.

The confirmation bar 11 is pushed out by the spring 27 until the right end of the groove 25 hits the retaining bolt 26, and the wedge operation bar 17 holds the wedge 15 in the contracted position by the piston 22a. In this state, the guide block 3 is moved toward the piston a by the cylinder 2a, and the tip of the confirmation bar 11 is inserted into the hole of the piston pin d inserted into the through hole b of the piston a. The confirmation bar 11 stops when the enlarged diameter part 12 collides with the tapered part on the front side, but the guide block 3 advances until it contacts the piston a. A clip e is fitted into the annular groove f in advance by the device of the earlier application, but if the clip e is not present, the piston pin d is pushed out from the piston a,
If there is a clip e but no piston pin d, or if there is neither a clip e nor a piston pin d, the tip of the confirmation bar 11 protrudes from the left end of the piston a, so in either case, the defect can be found at a glance. can do.

When the enlarged diameter portion 12 collides with the front taper portion of the piston pin d and stops, and it is confirmed that the clip e exists in the annular groove f, the clip e is fitted into the annular groove c using the method described above. That is, clip e
The first pushing bar 6 pushes the clip through the clip insertion groove 4 into the lower end of the annular groove c across the hexagonal part within the groove 30 of the confirmation bar 11 as shown in FIG. 2 is completely fitted into the annular groove c by the push bar 8.

To check whether the clip e is fitted into the groove c, the cylinder 22 is opened to free the piston 22a. When hiding, spring 2
1, the wedge operation bar 17 moves to the left to spread the opening/closing pieces 15a, 15b of the wedge 15 and bring their outer ends into contact with the tapered portion on the back side of the piston pin d. Then, when the guide block 3 is moved backward by the cylinder 2a, if the clip e is fitted into the annular groove c, the confirmation bar 11 will be left in place without being able to move due to the abutment of the wedge 15. , the existence of clip e can be confirmed.

If there is no clip e, the piston pin d will be pushed by the wedge 15 and appear outside the piston a, and if there is neither clip e nor piston pin d, the enlarged diameter part 1
2 appears, so defects can be discovered at a glance.

After confirming the existence of clip e, click confirmation bar 1.
1 from piston pin d, remove piston 2
2a to move the wedge operation bar 17 to the right. When hiding, open/close pieces 15a, 15 of wedge 15
Since b is pulled by the adjusting pieces 15c and 15d and contracts, it can be pulled out of the piston, thereby completing the confirmation work.

(Effect of the invention) When the clip is not inserted into the work,
Since the tip of the confirmation bar 11, the enlarged diameter portion 12, or the hollow pin come out of the workpiece, visual confirmation is extremely easy, and the work is easier and more reliable than the conventional method of directly observing the clip.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the embodiment of the present invention;
The figures are the front and side views of the clip, and Figure 3 is the first
Figure 4 is an enlarged front sectional view of the confirmation bar, Figure 5 is its plan view, Figure 6 is Figure 1,
FIG. 4 is a - sectional view of FIG. 4; 11... Confirmation bar, 12... Expanded diameter section, 15...
Wedge, 17... Wedge operation bar.

Claims (1)

[Scope of utility model registration request] An enlarged diameter part 12 having a size to engage with one end on the inner diameter side of the hollow pin d, a cylindrical part 13 that fits into the hollow pin d, and a slotted part 14 are connected to the front part of the confirmation bar 11 held so as to be slidable. The opening/closing pieces 15a and 15b of the wedge 15, which can be expanded to a size that engages the other end on the inner diameter side of the hollow pin d, are fixed to the slotted part 14,
A hollow pin retaining clip insertion confirmation device characterized in that adjustment pieces 15c and 15d of a wedge 15 are fixed to a head 17a of a wedge operating bar 17 which is slidably provided through the confirmation bar 11.