JPH07293616A - Drawing spring hooking device - Google Patents

Abstract

PURPOSE:To prevent a drawing spring from being laterally deviated in the vertical direction in relation to a plate surface of a latch by a simple structure. CONSTITUTION:A hole 12a for mounting a spring guide plate 13 is formed on a latch 12. A hole to which the latch 12 is loosely fitted by being plastically deformed is formed on one part of the spring guide plate 13, and a notch 13a to be fitted in the hole 12a is provided on the other part. Moreover, a guide part 13c to be engaged with the drawing spring 11 is provided on the part where the spring guide plate 13 and the drawing spring 11 are brought in contact with each other. The fitting of the latch 12 to the spring guide plate 13 is made reliable by this structure, and the drawing spring 11 can be prevented from being laterally deviated in the vertical direction in relation to the plate surface of the latch 12. Thereby the loosely fitting of the spring guide plate to the latch can be performed by simple work without increasing the number of part items, and the assembling costs can be decreased without increasing the part costs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to prevention of lateral shift of hooks of extension springs.

[0002]

2. Description of the Related Art The prior art will be described below. For example, referring to Japanese Utility Model Application Laid-Open No. 57-164333, in FIGS. 9 and 10, 1 is a coil-shaped extension spring, 2 is a latch for pulling and using the extension spring, and 2a is a spring guide. A hole 3 for the plate 3 to penetrate therethrough is a spring guide plate for restricting the pull spring 1 from being displaced in the vertical direction with respect to the plate surface of the latch 2 by engaging the latch 2 with the roll pin 4, and 4 is a spring guide. Latch 2 on board 3
It is a roll pin for preventing the lateral displacement of the pulling spring 1 that is driven in by sandwiching the two.

Next, the above operation will be described. 9 and 1
0, first, the tension spring 1 is attached to the latch 2 while twisting, and then the spring guide plate 3 is inserted into the hole 2a of the latch 2, and then the roll pin 4 is attached to the spring guide plate 3.
Two pieces are sandwiched by a hammer or the like (not shown) and loosely fitted. As a result, when the latch 2 is pulled, the roll pin 4 catches the pulling spring 1 from laterally deviating from the plate surface of the latch 2 in the vertical direction.

Next, another one disclosed in Japanese Utility Model Laid-Open No. 62-194938 will be described with reference to FIG. Reference numeral 5 is a coil-shaped extension spring, 6 is a latch for hooking and pulling the extension spring 5, and 6a is a hole for loosely fitting the extension spring 5 through the latch 6 in a spiral shape.

Next, the above operation will be described. As shown in FIG. 11, the latch 6 while rotating the coil-shaped extension spring 5
The hole 6a formed in the hole is spirally penetrated and loosely fitted, and the pulling spring 5 is pulled by the latch 6 to function as a pulling spring. Here, since the hole 6a is formed to be slightly larger than the wire diameter of the pulling spring 5 in order to pass the pulling spring 5, when the latch 6 is pulled, the pulling spring 5 moves vertically with respect to the plate surface of the latch 6. There were problems such as being unable to prevent lateral slippage.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The pulling spring hook device of Japanese Patent No. 64333 is configured as described above, and the work of driving two roll pins is required, resulting in high assembly cost.

[0007] Further, the hook structure of the coil spring disclosed in another Japanese Utility Model Laid-Open No. 62-194938 makes it difficult to mount the spring while twisting the spring into the hook. In that case, there was a problem that a considerable amount of force was required for mounting and the work became difficult. Further, there is a problem in that the pulling spring cannot be prevented from being displaced laterally in the vertical direction with respect to the plate surface of the latch.

The present invention has been made to solve the above problems, and an object thereof is to reduce the total cost by using a simple assembling method with a small number of parts.

[0009]

According to a first aspect of the present invention, a pull spring hook device is provided with a hole in a part of a spring guide plate for allowing the spring guide plate to be plastically deformed after being mounted on the latch and loosely fitted to the latch. The other part is provided with a notch that fits into a hole provided in the latch.

In the pulling spring hook device according to the second aspect of the present invention, the hole provided in the latch has a convex shape.

According to the third aspect of the present invention, in the pull spring hook device, the hole provided in the latch has a T shape, and
At the top of the T-shaped hole, a spring guide plate is attached to the latch and plastically deformed to provide a hole for loosely fitting the latch.
The lower part of the spring guide plate is provided with a notch that fits into a T-shaped hole.

[0012]

In the pulling spring hook device according to the first and third aspects of the present invention, since the fitting between the latch and the spring guide plate can be easily and surely made, the pulling spring is perpendicular to the plate surface of the latch. It is possible to surely prevent lateral displacement and to assemble by a simple operation without increasing the number of parts, so that it is possible to reduce the assembly cost without increasing the part cost.

In the pull spring hook device according to the second aspect of the present invention, since the hole provided in the latch has a convex shape, the spring guide plate can be easily attached to the latch.

[0014]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are a perspective view and a front view showing a tension spring hook device according to a first embodiment. In the figure, 11 is a coil-shaped extension spring, 12 is a latch for hooking and pulling on the extension spring 11, 12a is a hole for a spring guide plate 13 to penetrate, 13 is a plate surface of the extension spring 11 for the latch 12 With respect to the vertical direction, a spring guide plate for restricting displacement of the spring guide plate 13a, a lateral deviation preventing notch for engaging the spring guide plate 13 with the latch 12, and a hole 13b for the latch. 12 spring guides 1
After inserting 3, insert a jig or the like into the hole 13b,
By pushing the spring guide plate 13 to the latch 12
It is loosely fitted so as not to come off. Reference numeral 14 denotes the above-mentioned jig that is inserted into the hole 13b provided in the spring guide plate 13. After inserting the spring guide 13 into the hole 12a provided in the latch 12, the jig 14 is driven into the hole 13b with a hammer or the like. Push the hole 13b wide. 13c
Is a guide portion that engages with the extension spring 11.

Next, the function of the tension spring hook device will be described. In FIG. 1, a latch 12 and a spring guide plate 1
Reference numeral 3 denotes a notch 13a which engages the latch 12 and is loosely fitted to each other at a right angle. When the latch 12 is pulled, the tension spring 11 is laterally displaced from the plate surface of the latch 12 in the vertical direction. This is prevented by receiving the inner diameter of the tension spring 11 at the portion 13c.

Next, a method of mounting the spring guide plate 13 on the latch 12 will be described. In FIG. 2, first, the spring guide plate 13 is passed through the hole 12a of the latch 12 and then the tension spring 11 is attached to the latch 12 while twisting. After that, a tool such as a jig 4 is driven into the hole 13b of the spring guide 13 with a hammer or the like (not shown) as shown in FIG. 2, and the hole 13b is expanded and plastically deformed so that the spring guide plate 13 does not come off from the latch 12. To play with. 3 (a) shows the original shape of the spring guide plate 13, and FIG. 3 (b) shows the jig 14
This is the shape of the spring guide plate 13 showing the state in which the hole 13b has been expanded by. The notch 13a is engaged with the hole 12a so that the spring guide plate 13 is loosely fitted to the latch 12 and the lateral displacement of the extension spring 11 can be prevented. In reality, the block 15 as shown in FIG.
Using the hole 1 of the spring guide plate 13 as shown in FIG. 4 (b).
3b is pushed by the hammer 16.

Example 2. In the first embodiment described above, the latch 12 is provided with the rectangular hole 12a. However, in order to facilitate the mounting of the spring guide plate 13 on the latch 12, a convex hole 12b as shown in FIG. 5 is provided. You can In this case, since the spring guide 13 can be inserted while being tilted as shown in FIG. 6, the insertion is facilitated.
In particular, as shown in FIG. 7, the spring guide plate 13 can be easily mounted on the latch 12 by rotating the spring guide plate 13 counterclockwise while escaping the corner 12c of the hole 12b by the notch 13a.

Example 3. In the above embodiment, an example in which the hole 13b of the spring guide plate 13 is plastically deformed is shown, but as shown in FIG. 8, the latch 12 is provided with a rectangular hole 12d and a T-shaped hole 12e, and a broken line is formed by a jig or the like. As described above, the spring guide plate 17 may be fitted to the latch 12 so as not to come off by expanding the hole 12d and plastically deforming it, and the same effect as that of the above-described embodiment is obtained.

[0019]

As described above, in the pulling spring hook device according to the first aspect of the present invention, a part of the spring guide plate is provided with a hole for allowing the spring guide plate to be plastically deformed after being mounted on the latch and loosely fitted on the latch. Since the other part of the spring guide plate is provided with a notch that fits into the hole provided in the latch, it is possible to reliably prevent the pulling spring from shifting laterally in the vertical direction with respect to the plate surface of the latch.
Furthermore, the assembly cost can be reduced without increasing the component cost because the assembly can be performed by a simple operation without increasing the number of components.

Further, in the pull spring hook device according to the second aspect of the present invention, since the hole provided in the latch has a convex shape, the spring guide plate can be easily attached to the latch.

Further, in the pulling spring hook device according to the third aspect of the present invention, the shape of the hole provided in the latch is T-shaped, and a spring guide plate is attached to the upper part of the T-shaped hole after the latch is attached to the hook. A hole was provided for deforming and allowing the latch to fit loosely, and a notch that fits into the T-shaped hole was provided in the lower part of the spring guide plate. Since it can be surely prevented, and the assembling cost can be reduced without increasing the number of parts and by a simple operation, the assembling cost can be reduced without increasing the cost of parts.

[Brief description of drawings]

FIG. 1 is a perspective view of a tension spring hook device according to a first embodiment of the present invention.

FIG. 2 is a front view showing an assembling method of the pulling spring hook device according to the first embodiment of the present invention.

FIG. 3 is a front view showing a spring guide plate in the pulling spring hook device according to the first embodiment of the present invention.

FIG. 4 is a diagram showing an assembling method of the pulling spring hook device according to the first embodiment of the present invention.

FIG. 5 is a front view showing a latch according to a second embodiment of the present invention.

FIG. 6 is an operation explanatory view showing the second embodiment of the present invention.

FIG. 7 is an operation explanatory view showing the second embodiment of the present invention.

FIG. 8 is a front view showing an assembling method of the pulling spring hook device according to the third embodiment of the present invention.

FIG. 9 is a front view showing a conventional pull spring hook device.

FIG. 10 is a side view showing a conventional pull spring hook device.

FIG. 11 is a perspective view showing a conventional pull spring hook device.

[Explanation of symbols]

11 pull spring, 12 latch, 12a, 12d, 13b
Hole, 12b convex hole, 12e T-shaped hole, 13 spring guide plate, 13a notch.

Claims (3)

[Claims] 1. A pull spring hook device having a plate-like latch that engages with one end of a pull spring, and a spring guide plate that is mounted in a hole provided in the latch in a direction perpendicular to the plate and restricts displacement of the pull spring. A part of the spring guide plate is provided with a hole for being plastically deformed after being attached to the latch to be loosely fitted in the latch, and the other part of the spring guide plate is provided with a cut for fitting into the hole provided in the latch. An extension spring hook device characterized in that a hook is provided. 2. The tension spring hook device according to claim 1, wherein the hole provided in the latch has a convex shape. 3. A pull spring hook device having a plate-like latch engaged with one end of a pull spring, and a spring guide plate mounted in a hole provided in the latch in a direction orthogonal to each other and restricting displacement of the pull spring. A hole for mounting the spring guide plate of the latch has a T shape, and a hole for fitting the spring guide plate to the latch after the spring guide plate is mounted on the latch and is loosely fitted to the upper portion of the T-shaped hole. A pulling spring hook device characterized in that a notch for fitting into the T-shaped hole is provided at a lower portion of the spring guide plate.