JPH0229293Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a stop washer that fits into a ring-shaped groove carved on the outer periphery of the shaft to prevent mechanical parts inserted into the shaft from coming off. It is related to.

[Summary of the idea]

In a stop washer that fits into a groove on a shaft to prevent gears, etc., from falling out, the stop washer is completely fitted onto the shaft by, for example, applying color to the claws that make up the stop washer. A stop washer that can be seen at a glance.

[Conventional technology]

Many locking washers are used in small electronic devices and transmission mechanisms to prevent various pivotally supported parts from slipping out.

FIG. 3 is a perspective view showing the state of the stop washer, and W1, W2, W3, . . . are gears M, respectively.
1. Shows a stop washer that is fitted by press-fitting into a groove carved on the outer periphery of the shaft S1, S2, S3, etc. that pivotally supports the pulley M2, slide plate M3, etc. .

Such lock washers W1, W2, W3,...
... are used in various sizes depending on the diameter of the shaft, from 2 mm for small ones to several tens of mm for large ones.
The shafts S1, S2, S3, . . . are respectively fitted with a jig or manually.

That is, as shown in FIG. 4a, when a stop washer W made of, for example, plastic or a thin metal plate is press-fitted into the shaft S in the axial direction, the claw portion F of the stop washer W is fitted into the shaft S. , and is locked in the state shown in FIG. 4b.

[Problem that the invention attempts to solve]

By the way, if the locking washer W is not press-fitted correctly, the claw portion F will be damaged as shown in Fig. 4c.
In some cases, all or part of the groove S1 does not fit completely into the groove S1.

Then, when vibrations, shocks, etc. are applied, this locking washer W separates from the shaft S, causing gears and other mechanical parts supported by the shaft S to fall off, causing major damage to electronic equipment. There is.

In order to solve this problem, this invention aims to eliminate the cause of accidents by making such incomplete insertion visible at a glance when looking at the mechanism in which the lock washer is fitted. .

[Problem that the invention attempts to solve]

In the stop washer of this invention, the claw part that fits into the groove of the shaft is colored in a color opposite to that of the mechanical part, for example.

[Effect]

When the locking washer is completely inserted into the groove of the shaft, the color painted on the claw part is not visible, so you can see that the locking washer is completely press-fitted into the shaft and the shaft is supported. It is possible to prevent missing mechanical parts.

〔Example〕

Fig. 1 shows a perspective view of the stop washer of this invention, and 10 is the main body of the stop washer punched out of nylon or elastic metal, and the inner diameter r is slightly larger than the groove diameter of the shaft S. It is said to be the dimensions. The circle indicated by the dotted line is a portion of the circle corresponding to the diameter of the shaft, and the fan-shaped claw portions 10a,
10b and 10c are coated or printed with a color different from the surface of the main body 10 of the locking washer. Therefore, when such a stop washer is press-fitted onto the shaft S as described above and fitted into the groove, the claw portion 10
The colors assigned to a, 10b, 10c are the second
As shown in Figure a, it is completely invisible, confirming that it is fully inserted. However, when the press-fit is incomplete, the color of the claw portion F appears as shown in FIG. 2B, so that the incomplete press-fit can be easily discovered and accidents can be prevented.

The nail parts 10a, 10b, 10c should be colored in colors that are sensitive to the human eye, such as green, white, red, etc., but the back color of the machine that uses this locking washer should be taken into consideration. You may also use the opposite color.

In addition, if the pigment contains fluorescent materials, etc.
Even more effective. However, in the case of a large stop washer, this portion may simply be plated to enhance the reflection of light.

Note that the shape and number of the claw portions can be set arbitrarily.

[Effect of idea]

As explained above, the stop washer of this invention has a coloring that is different from the other parts on the claw part.
Alternatively, since the locking washer is identified, it has the advantage that when used to prevent mechanical parts from falling out, it can be easily confirmed that the locking washer is completely inserted. This has the effect of improving the reliability of the assembled mechanical parts.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the stop washer of this invention, Fig. 2 a and b are explanatory views when the stop washer is inserted, Fig. 3 is a perspective view showing an example of the use of the stop washer, and Figs. 4 a and b. , c are explanatory views when inserting the stop washer. In the figure, 10 is the main body of the washer, 10a, 1
0b and 10c are claw parts, and S is a shaft.

Claims (1)

[Scope of utility model registration request] A stopper characterized in that a plurality of fan-shaped first regions fitted into a groove of a shaft and a ring-shaped second region connected to the first regions are formed so as to be distinguishable. Watsiya.