JPS6311375Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a screw attachment device for attaching a mounting member such as a panel to a housing of an electrical device or the like via screws.

[Prior art]

Conventional screw mounting devices used in electrical equipment are
As shown in the figure, mounting member 1 for electrical equipment panels, etc.
The mounting member 1 is fixed to the housing 4 by inserting a screw 3 into a hole 2 drilled in the housing 4 and screwing the screw 3 into a female thread 5 previously machined in the housing 4. Further, when the mounting member 1 is to be removed from the housing 4, the screw 3 is loosened from the female thread 5 of the housing 4, and the mounting member 1 is opened at the hinge 6 or removed.

However, in such a conventional example, it is not known when the screw has come off from the female thread of the casing, so the condition of the screw must be checked before opening or removing the mounting member from the casing, and there is no way to know when the screw has come off from the female thread of the casing. Since the mounting member is not fixed to the mounting member, there is a drawback that the screw collides with the mounting member or the housing due to wobbling vibration of the mounting member, causing noise, or the screw may be pulled out from the mounting member.

Furthermore, when the mounting member is closed via the hinge, the screws are unsteady, so the screws do not insert properly into the female threads of the casing and hit the casing, damaging the casing or crushing the screw tips. be.

Therefore, in order to solve the above-mentioned drawbacks, a conventional example shown in FIG. 3 was devised. This conventional example is the third
As shown in the figure, a support frame 9 with a hole 8 bored therein is fixed to the mounting member 7, and both ends of a coil spring 11 are fixed and inserted into the support frame 9 and screws 10, respectively, and the mounting member 7 is attached to the housing. 12, install the housing 1 in advance.
When screwing the screw 10 into the female thread 13 machined into the housing 12 against the elastic force of the coil spring 11, and opening the mounting member 7 via the hinge 14, loosen the screw 10 from the female thread 13 of the housing 12. Remove the screw 10
remains attached to the mounting member 7 via the coil spring 11.

However, since such a conventional example uses a spiral coil spring, it has a disadvantage that the structure is complicated and large, and the places where it can be used are limited.

[Purpose of invention]

The present invention was made in order to solve the above-mentioned drawbacks, and its purpose is to provide an inexpensive screw mounting device that can easily and reliably detect the dislodgement of a screw from the female thread of the housing and prevent the screw from snapping. It is about providing.

[Structure of the idea]

In order to achieve the above-mentioned object, the present invention involves inserting and fixing a magnet in the middle of the screw, providing a repulsive magnet in the support section in front of the magnet to repel the magnet, and attaching a repulsive magnet in the rear of the magnet. It is characterized in that the member is provided with an attraction magnet that attracts each other with the magnet.

[Effect]

In the present invention with such a structure, when a screw is removed from the female thread of the casing, the magnet of the screw is pushed toward the mounting member by the repulsion magnet and attracted to the suction magnet, so that the screw is removed from the female thread of the casing. This can be seen instantly and the screws are fixed to the mounting member.

〔Example〕

Hereinafter, a first embodiment of the present invention will be described based on FIG. 1. FIG. 1 is a side sectional view of this embodiment, and 15 is a screw, into which a magnet 16 is inserted and fixed. Reference numeral 17 designates a mounting member such as a panel, which has a hole 18 into which the screw 15 is inserted as shown in FIG. 19 is fixedly arranged.

Reference numeral 20 denotes a housing of an electronic device, etc., in which a female screw 21 into which the screw 15 is screwed is bored, and a supporting portion 2 is provided around the female screw 21.
1a, that is, in front of the magnet 16 of the screw 15, there is a repulsive magnet 22 that repels the magnet 16.
be placed in a fixed position. A hinge 23 connects the housing 20 and the mounting member 17.

In this embodiment, the magnet 16, the attraction magnet 19, and the repulsion magnet 22 are made of annular plate magnets, and the screw 15 is connected to the female screw 2 of the housing 17.
When removed from 1, magnet 16 becomes repulsive magnet 2.
The polarity and arrangement are such that they repel each other and are attracted to the attraction magnet 19.

Next, the operation of the above structure will be explained. First, when attaching the mounting member 17 to the housing 20, the mounting member 17 is closed via the hinge 23, and the screw 15 is pulled by the attraction force of the attraction magnet 19 and the repulsion magnet 22.
The mounting member 17 is attached to the housing 20 by pushing it against the repulsive force of and screwing it into the female thread 21 of the housing 20.

Furthermore, when removing the mounting member 17 from the housing 20, when the screw 15 is loosened from the female thread 21 of the housing 20, the moment the screw 15 comes off from the female thread 21, the magnet 16 of the screw 15 is pushed by the repulsive magnet 22. It is found that the screw 15 has come off from the female thread 21, and the magnet 16 of the screw 15 is attracted to the suction magnet 19 and is fixed to the mounting member 17, so that the screw 15 may come off from the mounting member 17 or generate noise due to vibration. It will stop happening.

Note that when the screw 15 is fixed to the mounting member 17, the tip of the screw 15 is placed near the female thread 21, so when the screw 15 is screwed into the female thread 21 again, the tip of the screw 15 is placed close to the female thread 21. It will not be damaged by hitting the casing 20 or the like.

A second embodiment of the present invention will be described based on FIGS. 4 and 5.

FIG. 4 is a side sectional view of the present embodiment, and FIG. 5 is a plan view of the plate material. Numeral 24 is a screw, and a magnet 25 is inserted and fixed in the middle. Reference numeral 26 is a plate material having a hole 27 in the center thereof into which the screw 24 is inserted as shown in FIG. Fixed placement. Reference numeral 29 denotes a support frame attached to the suction magnet 28 side of the plate material 26, and an insertion hole 31 into which the screw 24 is inserted is bored in the support portion 30 at the tip, and the periphery of the insertion hole 31 on the magnet 25 side, that is, the magnet 25 A repulsive magnet 32 that repels the magnet 25 is fixedly arranged on the front support part 30.

Reference numeral 33 denotes a mounting member such as a panel, which is attached to the support frame 29.
A hole 34 for insertion and locking is bored, and the plate material 26 is attached. Reference numeral 35 designates a housing for electrical equipment, etc., into which a female screw 36 into which the screw 24 is screwed is bored.

In addition, the magnet 25 and the attraction magnet 28
In this embodiment, the repulsion magnet 32 is made of an annular plate magnet, and has a polarity such that when the screw 24 is removed from the female thread 36 of the housing 35, the magnet 25 repels the repulsion magnet 32 and is attracted to the attraction magnet 28. and arrangement.

The second embodiment having such a configuration also operates in the same manner as the first embodiment.

[Effect of idea]

As described above, according to the screw mounting device of the present invention, a magnet is inserted and fixed in the middle of the screw, and a repulsive magnet is provided in the support section in front of the magnet to repel the magnet, and a repulsive magnet is provided in the support section in front of the magnet. By providing the mounting member with a suction magnet that attracts each other with the magnet, when a screw is removed from the female thread of the casing, the magnet of the screw is pushed toward the mounting member by the repulsion magnet and is attracted to the suction magnet. Since the screw is fixed to the mounting member, it is instantly known that the screw has come off from the female thread, and since the screw does not rattle, there is an effect that noise is not generated or the screw does not fall off from the mounting member.

Furthermore, since the screw is fixed to the mounting member, it can be easily inserted and screwed into the female thread of the casing, so the tip of the screw, the casing, etc. do not touch each other, and the structure is simple. Therefore, it has the effect of being able to be manufactured at low cost.

Furthermore, by integrally attaching the support portion to the attachment member, mass production becomes possible, which has the significant effect of reducing manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing the first embodiment of the present invention;
Fig. 2 is a side sectional view of the conventional example, Fig. 3 is a side sectional view of another conventional example, Fig. 4 is a side sectional view showing the second embodiment of the present invention, and Fig. 5 is a plan view of the plate material. It is. 15, 24... Screw, 16, 25... Magnet, 17, 33... Mounting member, 18, 34...
Hole, 19, 25... Attraction magnet, 20, 35
...Housing, 21, 36...Female thread, 21a, 30
...Support part, 22, 32...Repulsion magnet.

Claims (1)

[Scope of utility model registration request] In a screw mounting device that attaches the mounting member to the housing, the magnet is inserted and fixed in the middle of the screw by inserting the screw into the hole drilled in the mounting member and screwing it into the female thread drilled in the housing. However, by providing a repulsion magnet that repels the magnet at the support section in front of the magnet, and a suction magnet that attracts the magnet to the mounting member at the rear of the magnet, it is possible to remove the screw from the female thread of the casing. A screw mounting device characterized in that the magnet of the screw is pushed toward the mounting member by a repulsion magnet and is attracted to an attraction magnet to fix the screw to the mounting member.