JP3165037U - Magnetic removal prevention screw unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress unnecessary removal of a screw. SOLUTION: The screw portion and the cover portion are made of a structure that idles, and a plurality of parts that idle further are integrated as a form. The screw part and the cover part are usually in a slipping relationship, and have the effect of suppressing unnecessary removal by a third party. Inside this idling cover, there is a pin that is attracted by magnetic force, and by applying magnetic force to the cover portion, the pin moves and the cover and screw portion can be integrated to stop idling. Therefore, it is possible to tighten the screw portion only when the magnetic force is applied. [Selection diagram] FIG. 7

Description

  The present invention mainly relates to a technique for preventing an unnecessary screw from being removed by a third party, thereby preventing an attachment from being inadvertently removed and enabling removal by a magnetic force such as a magnet. .

  Originally, the screw has been used to fix the member. Basically, the screw is formed of a screw portion and a head on a spiral, and a rotational force must be generated in order to exert a fastening force. For this reason, there are crosses and hexagonal holes in the screw head, and the head itself has a hexagonal shape. A rotating force can be given to this by using a screwdriver or a spanner. It is also possible to perform fastening with bare hands by enlarging the head of the screw or cutting a knurled groove so as not to slide around the head.

  JP-A-8-135644

  Screws are convenient because they can be easily tightened and removed by tools and hands compared to bonding and welding. However, on the other hand, since it can be easily removed, the fasteners are stolen or mischievous due to unintentional removal. There is a cover that hides the cross hole so that a third party does not turn the screw, but the cover is easily removed, and it does not help prevent the screw from being removed. This is to improve the screw unit that is difficult for third parties to remove.

  In order to make it difficult for a third party to remove the screw as a form according to the present invention, a screw that is difficult to turn for a third party is devised. The cover is put on the threaded portion, and the cover is idled without applying a rotational force to the threaded portion. Thereby, a rotational force cannot be given to a screw and it becomes a screw unit which is hard to remove. Moreover, when removing, the cover and the screw part are integrated by bringing the magnetic force of a magnet or the like closer so that the screw part can be rotated. The present invention is provided with a structure for idling in this way and a structure for integrating the cover and the screw portion by the force of magnetic force such as a magnet.

  The present invention can prevent unnecessary removal of a screw by a third party and also has a function as a cover for covering the screw portion, and thus has a cosmetic effect on the screw portion.

It is a figure which shows the structure of a thread part. It is a figure which shows the structure of a screw cover member. It is a figure which shows the structure of the pin which is a magnetic body. It is a figure which shows the structure of the member holding a magnet. It is a figure which shows the structure of C ring. It is a figure which shows the structure of a screw cover unit. It is a figure which shows embodiment of the penetration type screw unit. It is a figure which shows embodiment of a screw hole type screw unit.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram illustrating a configuration of a screw. FIG. 2 is a diagram illustrating a configuration of the screw cover member. FIG. 3 is a diagram illustrating a configuration of a magnetic pin incorporated in the screw cover member. FIG. 4 is a diagram illustrating a member for holding a magnetic force that plays a role of attracting a magnetic body. FIG. 5 is a view showing a configuration of a C-ring used for holding the screw portion on the screw cover member. FIG. 6 is a view showing a screw unit incorporating a component. FIG. 7 is a view showing an embodiment in which the screw B is long and penetrates the screw cover unit. FIG. 8 is a view showing an embodiment of a screw unit having a bag hole that is short and is fixed so as to cover the screw B. FIG.

[Constitution]
The unit in this embodiment is located in a form in which the screw cover member 2 covers the screw portion 1 and the head of the screw portion 1, as in the screw unit of FIG. A pin 3 and a spring B, which are magnetic bodies, are inserted in advance into the upper hole of the screw portion 1. Further, the screw part 1 and the cover part 2 are held by a C-ring 5 so as not to be detached. Hereinafter, each configuration will be described in detail.

  As shown in FIG. 1 (a), the screw portion 1 shown in FIG. 1 has a screw hole 10 cut at the center of the circumference, and a pin receiving hole 11 at an eccentric location. This hole is configured to receive a pin 3 that is a magnetic body. Further, as shown in FIG. 1B, the hole 10 has a bag hole structure, and the pin 3 does not come out downward. Further, the 12 portion has a stepped structure, and the lower portion is thinner than the upper portion in the figure. This is where the C-ring 4 is received. Although the screw hole 10 is described above, the screw portion may be a male screw. Further, any conditions such as screw pitch, number of threads, and thickness may be used.

  The screw cover 2 shown in FIG. 2 is installed so as to cover the screw part 1, but before installation, the pin 3 which is a magnetic body incorporating the spring B must be installed in the pin accommodation hole 11 of the screw part 1. I must. The pin 3 must be magnetic or magnetic so that it can be attracted by the magnetic force. The pin 3 has a stepped structure for holding the spring B. The pin 3 incorporating the spring B is installed without jumping out from the pin accommodation hole 11 of the screw portion 1. Here, the spring B has a structure that slightly protrudes from the upper part of the pin accommodation hole 11.

  A pin receiving hole 13 is formed inside the screw cover 2 as shown in FIG. This hole has a diameter that allows the narrowest portion of the stepped portion of the pin 3 to enter. Furthermore, the shape is bag-shaped and does not come off at the top. Further, a through hole 14 is opened at the center so that a long screw can be accommodated. Further, as shown in the cross-sectional view (b) of FIG. 2, a C-ring groove 15 is provided for fitting the C-ring 4.

  In order to incorporate the screw part 1 incorporating the pin 3 and the spring B, which are magnetic bodies, into the screw cover 2, the screw cover 2 is placed over the screw part 1 incorporating the member. Furthermore, it is fixed by fitting the C-ring 4 into the C-ring groove 15 provided in the screw cover 2. The fixed unit is in the state shown in FIG. In this state, the nut portion held at a fixed position by the C-ring 5 is in a state where the screw portion 1 and the screw cover portion 2 idle with a certain clearance even when torque is applied to the screw cover portion 2.

  In the spring B incorporated here, for example, in the state shown in the drawing, when the upper part and the lower part are turned upside down, the pin 3 jumps out of the pin housing hole, and is coupled with the screw cover 2 to prevent idling. there is a possibility. In order to prevent this, unless the magnetic force is approached, it must be contained in the pin receiving hole. Therefore, the screw cover 2 and the magnetic pin must always have a certain reaction force. The spring B is incorporated for this purpose. Also, by changing the spring rate, it is possible to adjust the magnetic force that operates the pin 3 that is a magnetic body.

  FIG. 6 shows a member for holding a magnet M that is a magnetic force for operating the pin 3. Like the screw cover, there is an opening hole 16 in the center, and the inside has a stepped structure. Further, a magnet hold hole 17 is formed, and the magnet M is press-fitted or bonded thereto to hold it.

  FIG. 6A is a diagram in which units are assembled. FIG. 6B is a diagram when the pin 3 is actuated by the magnet. In (a), since no magnet is attached, the spring B is accommodated without jumping out of the accommodation hole 11. Thereby, the screw part 1 and the screw cover part 2 are not fitted by the pin 3. For this reason, the screw part 1 and the screw cover part 2 are idled, making unnecessary removal by a third party impossible. FIG. 6B is a diagram in which the pin 3 is actuated by a magnet. The magnet holding bracket unit 4 holding the magnet is put on the screw cover portion 2 to transmit the magnetic force to the pin 3 which is a magnetic body. Thereby, the pin 3 opposes the reaction force of the spring B and is attracted to the magnet side which is the magnetic force side. When the screw cover portion 2 is rotated in this state, the screw cover portion 2 and the screw portion 1 are coupled with each other through the pin receiving hole 13 in the screw cover portion 2 within one rotation. Thereby, the torque applied to the screw cover portion 2 is transmitted to the screw portion 1 and can be tightened and removed.

  Next, a usage example regarding the above screw cover unit will be described with reference to FIGS. FIG. 7 shows an example of use for the above-described penetrating screw cover unit. FIG. 8 shows an example of using a screw hole type screw cover unit for a short screw.

  The penetration type screw cover unit is an example of use for a long screw. The attachment P is fixed to the male screw B protruding from the wall surface or the construction surface W. In order to rotate the screw part 1 and obtain a fastening force, it is necessary to apply torque to the screw cover part 2 and transmit it to the screw part. << FIG. 7A is a diagram during idling. >> To that end, the magnet holder unit must be attached and the pin 3 must be operated. The magnet unit attached to the screw cover portion 2 attracts the magnet side against the reaction force of the spring B. As a result, the tip of the pin 3 is fitted into the pin receiving hole 13 opened in the screw cover portion 2, and torque is transmitted. << FIG.7 (b) is a figure at the time of a pin action | operation. >> The magnet unit must always be attached at the time of screw fastening. After the fastening is completed, the magnet unit is removed so that the pin 3 is placed in the pin accommodation hole by the reaction force of the spring B. As a result, the screw portion 1 and the screw cover 2 are released from the coupling and idle. Since it is necessary to use this magnet for removing the screw, unnecessary removal by a third party can be suppressed.

  To remove the fastened screw cover unit, a magnet unit is used. Similarly to the above fastening, the magnet unit is applied to the upper surface of the screw cover portion 2 to operate the pin to transmit torque and to remove it.

  The bag hole type screw cover unit of FIG. 8 is used for a short screw cover or a decoration purpose. In addition, as with the through nut, it is possible to suppress unnecessary screw removal by a third party. The magnet holder can be used in common with the penetration type, and the structure of the pin and the like is the same as that of the penetration type.

  An object of the present invention is to prevent unnecessary screw removal by a third party, and it can be applied to various exposed screws and has industrial applicability.

DESCRIPTION OF SYMBOLS 1 Screw part 2 Screw cover part 3 Pin 4 Magnet unit 10 Screw hole 11 Pin accommodation hole 12 C ring receiving 13 Pin receiving hole 14 Through hole 15 C ring groove 16 Opening hole 17 Magnet hold hole 100 Through type screw unit 150 Bag hole type Screw unit

Claims (4)

A screw unit characterized by covering a screw head and rotating by a plurality of constituent members without detaching from the screw head, and by integrating a plurality of members at the time of fastening. The integrated structure shown in claim 1 is provided with a magnetic body inside a plurality of component parts, and a structure in which the magnetic body protrudes in the vertical direction or the horizontal direction by bringing a member that generates a magnetic force close to the component. The screw cover is characterized in that the members are fitted and integrated with each other. 3. The screw unit according to claim 2, wherein the unit having an integrated structure has a member that generates a magnetic force inside, and can be used even when a magnetic body installed outside is used. In Claim 1, although it was set as the screw cover and the cover (female screw component) which covers a male screw part, the screw unit of Claim 1 to 3 which is not only a female screw component but a male screw component.

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