JPS6053209A - Screw detachment preventing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for removing screws for attaching a panel or a cover to, for example, an electrical equipment housing.

[Prior art]

When maintaining the internal circuits of electrical equipment.

Naturally, it is necessary to remove the panel or cover from the flute body, but at this time, take care to prevent the screws that secure the panel, cover, etc. to the housing from falling off and being lost. The reality is that various measures are being taken.

First, let's look at the conventional method of preventing screws from falling off, as shown in Figures 1 and 2.
This will be explained below using figures.

Figure 1 shows a state in which a mounting body (for example, a panel) is attached to an object to be attached (for example, a housing) using the conventional screw fall prevention method, and Figure 2 shows a state in which the mounting body has been removed from the object to be attached. FIG. 3 is a diagram taken along arrow λ-A in FIG. 1.

In the figure, (1) is a screw for fixing the mounting body (2) to the four parts (3) and the object to be removed (4) which has a female thread in the center, and the lower part of the neck (5). For some diameters, the threads are removed so that they are slightly smaller than the thread diameter.

(6) is an E-shaped IL ring fitted to this part.

However, in the method described above from 17 to 2, as shown in FIG. 6
) interferes with the back surface of the mounting body (2), and the E-type retaining ring (6) comes off in the direction of the arrow in Figure 3.

I often lost the screw (11) mentioned above.

In addition, a groove must be provided in a part of the lower neck part (5) of the screw for fitting the E-shaped retaining ring (6),
In particular, when the screw diameter is extremely small, there is a problem that the strength of the two screws as a screw is reduced.

[Summary of the invention]

This invention has been made to solve the above-mentioned problems, and proposes a method for preventing screws from falling off by passing a plate spring-like ring through the lower part of the screw neck.

[Embodiments of the invention]

FIG. 4 is a view showing a method for preventing a threaded screw from falling off using a ring, which is a feature of the present invention, and FIG. 5 is an enlarged view taken along arrow B-J in FIG. 4.

In the figure, (7) is a ring that is provided with a female thread (8) and a notch (9) that engages with the screw (1) and is deformed into a leaf spring shape, and is attached to the mounting body (2). The lower part of the neck (5) of the screw f11 located between the
).

〔Effect of the invention〕

As described above, according to the method for preventing the screw from falling off according to the present invention, the ring (7) is attached to the lower part of the neck (5), so that the screw (1) is tilted as shown in FIG. Even if the ring (7) interferes with the back surface of the mounting body (2), the ring (7) will not fall off, so the screw (1) will not be lost.

There is still no need to provide a groove in a part of the lower neck part (5) of the screw for fitting the E-type retaining ring (6).
Even if the screw diameter becomes extremely small, a method can be provided to prevent the screw from falling off, so there is no need to worry about the strength of the screw itself decreasing.

Further, the ring (7), which has a plate spring shape, can be temporarily returned to a plate shape on a bench or the like.
) can pass through the threaded part of the screw (1) and can be removed from the screw (1), so the screw (1) can be attached to the mounting body (2). However, it can be easily installed and removed.

[Brief explanation of drawings]

Figure 1 shows the attachment body attached to the object to be attached using the conventional method for preventing screws from falling off. Figure 2 shows the attachment body removed from the object to which it is attached. 3 is a view taken along arrow A-A in FIG. 1, and FIG. 4 is a diagram showing a state in which a method for preventing screws from falling off is set up using a ring, which is a feature of the present invention.
FIG. 5 is an enlarged view taken along arrow B-B in FIG. In the figure, (1) is a screw, (2) is a mounting body, and (3) is a recess. (4) is the object to be attached, (5) is the lower part of the neck, (6) is the E-shaped retaining ring, (7) is the ring, (8) is the female screw, and (9) is the notch. Note that the same or corresponding parts in the two figures are designated by the same reference numerals. Agent Masuo Oiwa FII Figure 1 Figure 21! IO Figure 3 Figure 4

Claims (1)

[Claims] The mounting body is made up of four parts using screws whose threads have been removed so that the diameter of a part of the lower part of the neck is slightly smaller than the thread diameter, and a female thread into which the above-mentioned screws are screwed is attached to the center part of the mounting body. attached to the object to be attached, and to the thread-removed portion of the screw located between the object to be attached and the object to be attached. A method for preventing a screw from falling off, characterized in that the screw is prevented from falling off from the mounting body by passing a plate spring-like ring having a female thread that engages with the screw.