JPH08247122A - Snap pin - Google Patents

Abstract

PURPOSE: To provide a snap pin in which the load added to the fingers of a worker can be effectively reduced. CONSTITUTION: In a snap pin having a linearly insert leg part 2 on one end side of a ring part 1, and a curved elastic leg part 3 on the other end side, the ring part 1 is flatly crushed and then bent at a right angle, whereby the insert leg part 2 can be easily inserted to the pin hole of an intended shaft while holding the ring part 1 flatly crushed and bent at a right angle. Thus, the working property is enhanced only by this, and since the surface contact state to the flatly crushed ring part 1 can be ensured for the finger touch of a worker, the load added to the fingers of the worker at insertion can be also effectively reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a snap pin used for connecting shafts in various machine fields.

[0002]

2. Description of the Related Art As a conventional snap pin, as shown in FIG. 4A, a linear insertion leg portion 12 is provided at one end of a C-shaped annular portion 11 and is curved at the other end. It is widely used in general that it is provided with a ball holding leg portion 13 having a shape, or as shown in B of the same figure, further has a retaining hook portion 14 added to the ball holding leg portion 13. In Although,
In using any of these snap pins, the operator presses the end edge of the annular portion 11 with his / her finger in a point contact state while the insertion leg portion 12 is inserted into the pin hole of the target shaft. Since it has to be inserted, a considerable pressing force is required for this insertion work, and the operator's finger is also considerably burdened. still,
Such a situation is particularly remarkable in the snap pin having the retaining hook portion 14.

In view of such disadvantages in use, for example, as shown in Japanese Utility Model Application Laid-Open No. 57-124611, by winding the above-mentioned annular portion 11 in a loop shape, the actual developed length of the snap pin itself. To reduce the rigidity between the insertion leg portion 12 and the holding leg portion 13, or to deform the C-shaped annular portion 11 as shown in FIG. An attempt is made to define the area 11a and to expand the contact of the operator's finger from point contact to line contact due to the existence of the linear shape area 11a.

[0004]

However, among these ideas, under the former one, the retaining hook portion 14 is provided.
If added, the rigidity of the hook portion 14 is also reduced at the same time, and this time, it becomes impossible to fully expect the retaining function, so it cannot be a fundamental solution.
Further, under the latter case, it was not possible to sufficiently expect that the burden on the operator's finger would be effectively reduced as a practical problem when the finger contact was expanded to the line contact.

[0005]

The present invention was developed in order to effectively solve such conventional problems.
According to the invention described above, a linear insertion leg is provided on one end side of the annular portion, and a snap pin is provided on the other end side of which a curved holding leg portion is provided, and the annular portion is formed into a flat plate shape. We adopted a configuration in which it is crushed and then bent at a right angle. Similarly, the invention according to claim 2 is based on the premise of a snap pin in which a linear insertion leg portion is provided on one end side of the annular portion and a curved elastic holding leg portion is provided on the other end side thereof. The structure is such that a clip having an upright wall extending at a right angle to the part is attached.

[0006]

According to any of the inventions, therefore, shafts whose insertion leg portions are subject to gripping an upright wall extending at a right angle of an annular portion or a clip which is crushed in a flat plate shape and bent at a right angle Needless to say, it is easier to insert it into the pin hole of the above, so even if it is only this, the workability will be better, but the contact of the operator's finger will be flattened. Further, since it is possible to ensure the surface contact state with respect to the annular portion or the upright wall, it is possible to effectively reduce the load on the operator's finger when inserting.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments. First, the snap pin according to the first embodiment will be described.
As shown in FIG. 1, as in the conventional case, a linear insertion leg 2 is provided at one end of a C-shaped annular portion 1, and a curved holding leg 3 is provided at the other end thereof. It is premised that the retaining leg 4 is provided at its tip with a retaining hook portion 4 that twists in the direction of the inserting leg portion 2. However, the characteristic feature is that it has the C-shape. The point is that the entire annular portion 1 is once crushed into a flat plate shape by pressing or the like, and then the flat plate-shaped annular portion 1 is bent at a right angle to the inserting direction.

Therefore, under the snap pin of the first embodiment, since the annular portion 1 is flattened and bent at a right angle, the annular portion 1 is inserted while being held. Since it is possible to easily insert the leg portion 2 into the pin hole (not shown) of the target shaft, it goes without saying that the workability is improved by this alone, but the finger of the operator can be touched. Is approximately in surface contact with the annular portion 1 crushed into a flat plate shape, so that the load on the operator's finger during insertion can be effectively reduced.

Further, since the crushed annular portion 1 is bent at a right angle to the inserting direction of the inserting leg portion 2, for example, the retaining hook portion 4 for enhancing the rigidity is provided on the side of the elastic holding leg portion 3. Even if it is provided, it is possible to effectively reduce the rigidity between the insertion leg portion 2 and the elastic holding leg portion 3, and therefore, together with the reduction of the load on the finger, a strong pressing force is applied. Even if it is not used, it is possible to ensure that the insertion leg portion 2 is smoothly inserted into the pin hole of the shafts.

In addition, since the crushing of the annular portion 1 does not have any adverse effect on the retaining hook portion 4 side, there is no fear of deteriorating the retaining function of the hook portion 4, and the thrust is reduced. Even if you look at the shear force due to the load,
It was also found to be the same as the conventional standard.
In addition, in the first embodiment, the reason why the annular portion 1 is crushed before being bent is that, in addition to obtaining the above-described peculiar function and effect, depending on the size and the wire diameter, The fact that it is difficult to bend the annular portion 1 at a right angle is also taken into consideration.

Although not specifically shown in the first embodiment, a resin coating such as vinyl chloride is applied to the annular portion 1 which is flattened and bent at a right angle, or As shown in FIG. 2, if the structure in which the rubber or resin caps 5 are fitted together is used, the burden on the operator's finger during insertion can be reduced more effectively.

Next, the snap pin according to the second embodiment will be described. In the second embodiment, the annular portion 1 in the first embodiment is crushed into a flat plate shape and bent at a right angle. It is characterized in that the separately molded synthetic resin clip 6 is attached to the planar annular portion 1 ′. That is, in the second embodiment, as shown in FIG. 3, the clip 6 is provided with a fitting hole 8 into which the flat annular portion 1'is fitted to the rectangular base body 7. Then, a stopper projection 9 is provided on the bottom surface of the fitting hole 8 while an upright wall 10 extending upward at a right angle is formed at the end of the base body 7.
And the clip 6 is integrally attached to the annular portion 1 ′ by forcibly fitting the planar annular portion 1 ′ into the fitting hole 8. And

Therefore, under the snap pin of the second embodiment, even if the snap pin itself is not deformed,
Similar to the first embodiment, it is possible to easily insert the insertion leg 2 into the target pin hole while gripping the upright wall 10 of the clip 6 extending at a right angle, so that the workability is good. Needless to say, since the operator's finger also comes into surface contact with the upright wall 10, the burden on the operator's finger during insertion can be effectively reduced. is there. In addition, unlike the first embodiment, the second embodiment does not positively reduce the rigidity between the insertion leg portion 2 and the resilient holding leg portion 3, but the clip 6 having the upright wall 10 is made organic. Needless to say, the smooth insertion into the pin hole of the insertion leg portion 2 can be assisted by utilizing the same.

In each of the above embodiments, the snap pin having the retaining leg 4 on the side of the elastic holding leg 3 is targeted, but the present invention is not limited to this. The present invention is not limited to this, and a snap pin without the hook portion 4 can be applied, and the form of the holding leg portion 3 including the hook portion 4 is also limited to that of the illustrated embodiment. It's never a thing.

[0015]

As described above, according to the present invention, by adopting the above-mentioned structure, while inserting the vertically extending wall of the annular portion or the clip which is crushed into a flat plate and bent at a right angle, the insertion leg portion thereof is held. Not only can it be easily inserted into the pin hole of the target shafts, but
Since it is possible to ensure the surface contact state with respect to the annular portion or the upright wall that is crushed in a flat plate shape, it is possible to effectively reduce the load on the operator's finger during insertion. Further, in particular, under the configuration in which the annular portion is flattened and then bent at a right angle, the rigidity between the insertion leg portion and the elastic holding leg portion can be effectively reduced. Combined with the reduction of the load on the shaft, the insertion leg can be smoothly inserted into the pin hole of the shaft without using a strong pressing force.

[Brief description of drawings]

FIG. 1 is a perspective view showing a snap pin according to a first embodiment of the present invention.

FIG. 2 is a side view showing a partially cutaway application example of the first embodiment.

FIG. 3A is an exploded perspective view showing a snap pin according to a second embodiment, and FIG. 3B is a sectional view showing its mounting state.

FIGS. 4A and 4B are plan views showing snap pins that have been widely and commonly used in the past.

FIG. 5 is a plan view showing an improved conventional snap pin.

[Explanation of symbols]

 1 annular part crushed into a flat plate and bent at a right angle 1'planar annular part 2 insertion leg part 3 resilient leg part 4 retaining hook part 5 caps 6 clip 7 base body 8 fitting hole 9 Stopper protrusion 10 Upright wall

Claims (2)

[Claims] 1. A snap pin having a linear insertion leg portion on one end side of the annular portion and a curved elastic holding leg portion on the other end side, wherein the annular portion is crushed into a flat plate shape. A snap pin characterized by being bent at a right angle from. 2. An upright wall extending perpendicularly to the annular portion in a snap pin having a linear insertion leg portion provided at one end side of the annular portion and a curved resilient holding leg portion provided at the other end side. A snap pin having a clip attached thereto.