WO2011162196A1

WO2011162196A1 - Theft prevention bolt

Info

Publication number: WO2011162196A1
Application number: PCT/JP2011/064020
Authority: WO
Inventors: 昇松本
Original assignee: 株式会社マツ・ショウ; 株式会社ハマ・システム
Priority date: 2010-06-24
Filing date: 2011-06-20
Publication date: 2011-12-29
Also published as: JP2012007662A; JP4730721B1

Abstract

A theft prevention bolt which sufficiently exhibits a theft preventing effect, enables work to be done without complication, can be easily handled, allows a bolt head body to be detached from an interconnection screw body, enables a first engagement section for a jig to be easily engaged with a second engagement section for a second jig, and enables a bolt base body to be loosened. A theft prevention bolt comprises a bolt base body (A), a bolt head body (E), a shaft body (B), a loaded spring (C), and an interconnection screw body (D). The loaded spring (C) causes second serrations (32) of the bolt head body (E) to be engaged with first serrations (3) of the bolt base body (A). A rotational force can be transmitted when the bolt head body (E) is rotated, and a rotational force cannot be transmitted to the bolt base body (A) when the bolt head body (E) is rotated in the opposite direction. The first serrations (3) are provided with a first engagement section (8) for a jig, and the interconnection screw body (D) is provided with a second engagement section (22) for a jig. A first engagement section (40) engages with the second engagement section (22) for a jig to enable the bolt head body (E) to be detached from the interconnection screw body (D). The bolt base body (A) can be reversely rotated by the second engagement section (41) of a second jig (F2), the second engagement section (41) engaging with the first engagement section (8) for a jig.

Description

Anti-theft bolt

The present invention relates to an anti-theft bolt that is optimal for fixing a license plate or the like, for example, and can be screwed by using a normal tool, and cannot be loosened once screwed, Moreover, the present invention relates to a theft prevention bolt devised so that it can be loosened in an emergency.

Conventionally, in this type of anti-theft bolt, for example, a bolt as shown in Patent Document 1 has been disclosed.
This is a bolt that can be tightened without using a special tool and cannot be loosened after tightening, but can be loosened in an emergency.
Specifically, a first bolt including a first bolt shaft having a recess at the center, a second bolt shaft in which a lower body is slidably inserted into the recess provided in the first bolt shaft, and the second A second bolt comprising a second serration provided at the front end of the bolt shaft, and a lock portion provided at the rear end of the second bolt shaft opposite to the second serration of the second bolt. On the head of the bolt, there is formed a first locking portion that becomes a locking portion when rotating in one direction and does not become a locking portion when rotating in the opposite direction, and the head of the first bolt of the second serration A second locking portion that is locked to the first locking portion provided on the first bolt and rotates the first bolt only in one direction is formed on the facing surface, and is provided on the first bolt. The open end of the recessed portion is inserted through the second bolt shaft and accommodated in the recessed portion. The serial locking portion are those that are configured narrow portion for locking.

JP 2009-275714 A

However, in the case of the bolt as described above, when it is necessary to loosen the bolt in an emergency, the second bolt is lifted upward to provide a gap between the first bolt and the second serration, The second bolt shaft must be cut using this gap. However, the cutting operation of the second bolt shaft itself is not possible even if a dedicated tool is used. In other words, although the role can be sufficiently fulfilled for theft prevention, in many cases it is necessary to loosen the bolt in the event of an emergency, and it is quite inconvenient in practical handling.

Therefore, the present invention can fulfill the role of anti-theft by eliminating the above-mentioned difficulties and the like, and the work of loosening the bolt in an emergency is not so troublesome and easy to handle. It was created to provide anti-theft bolts devised to be.

Therefore, in order to achieve the above-described problem, the antitheft bolt according to claim 1 can be screwed by using a normal tool G, and is loosened after screwing once. However, the anti-theft bolt is configured to be able to be loosened by a dedicated jig F in an emergency, and has a male screw portion 4 on the outer peripheral portion and one end of the first The bolt base A having the serration 3, the tool locking portion 34 on the outer side, the bolt head E having the second serration 32 on the inner side, and the bolt base A and the bolt head E so as to straddle. A shaft body B that is rotatably and slidably mounted on the bolt base A, and a resilient spring C that biases the shaft body B with a resilient force along the sliding direction. When attached to one end of the shaft body B The bolt head body E is provided with a connecting screw body D that can be screwed to the inside of the bolt head body E, and the second serration 32 of the bolt head body E causes the first serration of the bolt base body A by the resilient force of the resilient spring C. 3 so that the bolt head E is rotated in a predetermined direction so that the rotational force of the bolt head E is transmitted to the bolt base A, and the bolt head E is When the head body E is rotated in the reverse direction with respect to a predetermined direction, the bolt head body E is idled so that the rotational force of the bolt head body E is not transmitted to the bolt base body A. In the serration 3, a jig first locking portion 8 is formed, and in the connecting screw body D, a jig second locking portion 22 is formed, and When the bolt head E is separated from the bolt base A against the force, The first locking portion 40 of the first jig F1 that can be inserted through the gap space is formed so that a gap space is formed between the second serration 32 and the second serration 32. It is formed so that it can be locked to the locking portion 22, and is formed so that the bolt head body E can be removed from the connecting screw body D, and is locked to the jig first locking portion 8 of the bolt base A. The means which comprises so that the bolt base | substrate A can be reversely rotated by the 2nd latching | locking part 41 of the jig | tool F2 was employ | adopted.

In the antitheft bolt according to claim 2, the first locking portion 40 of the first jig F1 is provided at one end of one jig F, and the second jig F2 is provided at the other end. A means for providing the locking portion 41 was employed.

Therefore, according to the anti-theft bolt described in claim 1, for example, the number plate can be prevented from being stolen, and the anti-theft function can be sufficiently fulfilled. Moreover, when the antitheft bolt is loosened in an emergency, the work can be performed without much trouble, and the antitheft bolt becomes easier to handle.
Furthermore, since the tool locking portion 34 is provided on the bolt head E, the bolt head E can be rotated by a normal tool G, and the anti-theft bolt can be screwed.

In particular, the jig second locking portion 22 is formed in the connecting screw body D, and the first locking portion 40 of the first jig F1 that can be inserted from the gap space is connected to the jig second locking portion 22. Since it is formed so that it can be locked, the bolt head body E screwed to the connecting screw body D can be removed from the connecting screw body D by using the first jig F1 and the tool G. Become. Then, the second locking portion 41 of the second jig F2 can be easily locked to the first locking portion 8 for the jig of the bolt base A, and the bolt base A is reversed by the second jig F2. It can be rotated and loosened.

Further, according to the anti-theft bolt according to claim 2, the operation of loosening the anti-theft bolt is performed at the first locking portion 40 of the first jig F1 provided at one end of one jig F and at the other end. This can be performed with the second locking portion 41 of the second jig F2 provided, which makes it easier to use.

It is a partially cutaway exploded front view illustrating the antitheft bolt of the present invention. It is a partially cutaway front view illustrating the antitheft bolt of the present invention. It is a partially cutaway front view illustrating the antitheft bolt of the present invention. The bolt base | substrate of the antitheft bolt of this invention is illustrated, (I) is a top view, (II) is a side view. It is a partially cutaway front view which shows the usage example of the 1st jig | tool in the antitheft bolt of this invention. The usage example of the 1st jig | tool in the antitheft bolt of this invention is shown, (I) is a partially notched side view, (II) is a partially notched bottom view. The usage example of the 2nd jig | tool in the antitheft bolt of this invention is shown, (I) is a partially notched front view, (II) is a partially notched top view.

Hereinafter, the present invention will be described based on illustrated examples as follows.
The present invention relates to an anti-theft bolt for fixing, for example, a license plate and other things that are difficult to be stolen. The anti-theft bolt is a normal tool G (for example, a box wrench, a wrench, By using a wrench, bar wrench, etc.), it can be screwed using the male screw part 4 and cannot be loosened once screwed (for theft prevention), In an emergency (for example, at the time of replacement, repair, erroneous operation, etc.), it can be loosened by the dedicated jig F.
Specifically, the outer peripheral portion has a male screw portion 4, one end has a bolt base A having a first serration 3, a tool locking portion 34 on the outer side, and a second serration 32. A bolt head body E having an inner crocodile, a shaft body B that is mounted so as to straddle the bolt base body A and the bolt head body E, and is rotatably and slidably mounted on the bolt base body A. A resilient spring C that biases the resilient force along the sliding direction to the shaft body B, and a connecting screw body that is attached to one end of the shaft body B and that allows the inside of the bolt head body E to be screwed freely. D.
Then, the second serration 32 of the bolt head body E is formed so as to come close to the first serration 3 of the bolt base A by the elastic force of the spring spring C, and the bolt head body E is predetermined. When rotating in the direction (for example, clockwise), the bolt head E is formed so that the rotational force of the bolt head E is transmitted to the bolt base A, and the bolt head E is rotated in the reverse direction (for example, left) When the bolt head body E is rotated, the bolt head body E is idled so that the rotational force of the bolt head body E is not transmitted to the bolt base A.
Also, a jig first locking portion 8 is formed in the first serration 3 of the bolt base A, and a jig second locking portion 22 is formed in the connecting screw body D. It is.
Further, a gap space is formed between the first serration 3 and the second serration 32 when the bolt head E is separated from the bolt base A against the elastic force of the elastic spring C. .
In addition, the first locking portion 40 of the first jig F1 that can be inserted from the gap space is formed so as to be locked to the jig second locking portion 22 of the connecting screw body D, so that the bolt head E Is formed so as to be removable from the connecting screw body D.
Then, the bolt base A can be reversely rotated (for example, counterclockwise) by the second locking portion 41 of the second jig F2 locked to the jig first locking portion 8 of the bolt base A. Thus, the above-mentioned problem is achieved.

The bolt base A is integrally formed of, for example, a metal material, a synthetic resin material, an appropriate composite material, or the like. Specifically, the cylindrical base tube portion 1 and one end outer periphery of the base tube portion 1 are formed. Formed on the outer peripheral surface of the base tube portion 1 and the first serration 3 projecting toward the outer periphery of the one end surface of the flange portion 2 (upwardly). And a through hole 6 having a slightly smaller diameter than the spring accommodating recess 5.

The first serration 3 is configured to align a plurality of (for example, two to four, or more) inclined protrusions 7 in the rotational direction. The entire surface is curved along the direction, the height gradually increases from one end surface of the flange portion 2, and the maximum height portion is constituted by a substantially vertical surface. Moreover, the outer peripheral side surfaces of the first serration 3 and the flange portion 2 have a conical surface shape that gradually narrows as the connecting screw body D goes to the side. Let this portion be pinched with a spanner or the like to rotate backward. However, it is formed so that it cannot slide and pinch.

Moreover, the said 1st latching | locking part 8 for jigs is comprised by providing the inner peripheral surface of the 1st serration 3 on the side, for example, providing a flat surface in the inner peripheral surface of the inclination protrusion 7, respectively. Yes. That is, the second jig F <b> 2 that comes into contact with the plurality of first jig locking portions 8 by providing the flat first jig locking portions 8 on the inner peripheral surfaces of the plurality of inclined protrusions 7. The second locking portion 41 is configured so that forward and reverse rotational force can be applied to the bolt base A (see (II) in FIG. 7 and (I) in FIG. 4).

The shaft body B is integrally formed of, for example, a metal material, an appropriate composite material, or the like. Specifically, the shaft body B is formed so as to be able to rotate and slide through the through hole 6 of the bolt base A, A stopper projection 10 is formed at the other end, a stopper mounting groove 11 into which a stopper 13 (for example, E-ring, C-ring, etc.) can be mounted is formed at one end, and a connecting screw body D is formed at the one end. A screw body attaching portion 12 to which can be attached is formed.
Moreover, the retaining protrusion 10 is, for example, smaller in diameter than the inner diameter of the spring accommodating recess 5 of the bolt base A, larger in diameter than the inner diameter of the through hole 6, and can be locked to the other end portion of the elastic spring C. It is formed as follows.

The elastic spring C is formed, for example, in the shape of a coil spring, and is compressed between the peripheral edge portion of the other end opening of the through hole 6 of the bolt base A and the retaining protrusion 10 of the shaft body B. In the axial direction of the shaft body B, a resilient force such that the other end is pulled back to the side can be always urged.

The connecting screw body D is integrally formed of, for example, a metal material, an appropriate composite material, or the like. Specifically, the connecting screw body D is rotatable to the screw body mounting portion 12 of the shaft body B through the central insertion hole 20. At the same time, the stopper 13 is attached so as not to come out of the shaft body B. Moreover, a male screw portion 21 is formed on the outer peripheral portion of the connecting screw body D, and a jig second locking portion 22 is formed at the other end of the male screw portion 21.
In addition, the said 2nd latching | locking part 22 for jig | tools is formed of a pair of parallel flat surface, for example (refer (II) of FIG. 6).

The bolt head body E is integrally formed of, for example, a metal material, a synthetic resin material, an appropriate composite material, or the like. Specifically, the bolt head body E has a cap nut shape, and the other end surface is formed with a recess 30. A female screw portion 31 in which the male screw portion 21 of the connecting screw body D can be screwed is formed in the central portion in the concave portion 30, and a second serration 32 is formed in the inner peripheral portion of the concave portion 30. On the outer peripheral surface of the bolt head E, there is formed a tool locking portion 34 on which a normal tool G can be locked. Note that the tool locking portion 34 may be, for example, a hexagonal nut shape as shown in the figure, a hexagonal hole (not shown), or any other appropriate setting. It can be done.

The second serration 32 is configured to align a plurality of (for example, two to four, or more) inclined protrusions 33 in the rotational direction. The entire surface is curved along the direction, the height gradually increases from the back wall surface of the recess 30, and the maximum height portion is formed by a substantially vertical surface. Moreover, when the bolt head E is rotated in a predetermined direction (for example, clockwise), it is engaged with the inclined protrusion 7 of the first serration 3 so that the rotational force of the bolt head E can be transmitted to the bolt base A. However, when the bolt head E is rotated backward (for example, counterclockwise), the rotational force of the bolt head E cannot be transmitted to the bolt base A without being engaged with the inclined protrusion 7 of the first serration 3. Is formed. That is, when the bolt head body E is rotated in a predetermined direction (for example, clockwise), the vertical surface portion of the inclined protrusion 7 of the first serration 3 and the vertical surface portion of the inclined protrusion 33 of the second serration 32 are surely secured. And the rotational force of the bolt head E can be reliably transmitted to the bolt base A, and when the bolt head E is reversely rotated (for example, counterclockwise), the inclined projection of the first serration 3 7, the inclined surface portion of the inclined protrusion 33 of the second serration 32 slides repeatedly against the elastic force of the elastic spring C, and the rotational force of the bolt head E is applied to the bolt base A. It becomes impossible to communicate.
By the way, the inclined protrusion 7 of the first serration 3 and the inclined protrusion 33 of the second serration 32 are in a state in which the vertical surface of the inclined protrusion 7 and the vertical surface of the inclined protrusion 33 are in contact with each other by the retraction elastic force of the elastic spring C. The bolt head body E can be maintained in a locked state without rattling with respect to the bolt base A. Moreover, in this state, the first serration 3 of the bolt base A is formed in the recess 30 so that the first serration 3 is not exposed when viewed from the outside, and the appearance of the bolt Is formed to improve.

The jig F is integrally formed of, for example, a metal material, a synthetic resin material, an appropriate composite material, or the like. The first jig F1 is formed at one end, and the second jig F2 is formed at the other end. Is formed. That is, it is formed so that two operations can be performed by one jig F. The jig F may be formed separately for the first jig F1 and for the second jig F2.

For example, when the first jig F1 separates the first serration 3 and the second serration 32 by pulling the bolt head E away from the bolt base A against the elastic force of the elastic spring C. It is formed so that it can be inserted from a gap space that can be made. Moreover, a pair of first locking portions 40 that match the jig second locking portion 22 of the connecting screw body D are formed, and the jig second locking portion 22 portion of the connecting screw body D is paired with the pair. It is formed so that the connecting screw body D can be held in a non-rotatable manner by being securely sandwiched by the first locking portion 40. That is, after holding the connecting screw body D in a non-rotatable manner, the bolt head body E can be removed from the connecting screw body D by rotating the bolt head body E backward (rotating counterclockwise) with a normal tool G. .
Note that, in the first jig F1, a portion between the pair of first locking portions 40 is formed in a U-shaped groove shape in which the shaft body B is accommodated and abuts at the back thereof. It can be used as a guide when the first locking portion 40 is locked to the jig second locking portion 22, and the pair of first locking portions 40 are smoothly locked to the jig second locking portion 22. It is formed so that it can be done.

For example, the second jig F2 can be inserted into a gap formed between the inner peripheral surface of the first serration 3 and the outer peripheral surface of the connecting screw body D when one end is seen (when viewed from a plane). And it has the structure provided with the some 2nd latching | locking part 41 used as the plane which contact | abuts to the 1st latching part 8 for jigs of the 1st serration 3. FIG. That is, by removing the bolt head body E, a gap portion between the inner peripheral surface of the first serration 3 and the outer peripheral surface of the connecting screw body D is exposed. F2 is inserted, the second locking portion 41 is locked to the first locking portion 8 for jigs, and the bolt base A can be directly rotated in the reverse direction (left rotation) by the second jig F2. The base A can be removed.

The anti-theft bolt of the present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the invention.

Thus, the anti-theft bolt of the present invention can be screwed by using a normal tool, cannot be loosened once screwed, and can be loosened in an emergency. An anti-theft bolt that can suppress theft of a plate or the like.

A Bolt Base 1 Base Cylinder 2 Flange 3 First Serration 4 Male Thread 5 Spring Retaining Recess 6 Through Hole 7 Inclined Protrusion 8 Jig First Locking Section B Shaft 10 Detach Projection 11 Stopper Mounting Groove 12 Screw body mounting portion 13 Stopper C Elastic spring D Connection screw body 20 Insertion hole 21 Male screw portion 22 Second locking portion for jig E Bolt head body 30 Recessed portion 31 Female screw portion 32 Second serration 33 Inclined protrusion 34 For tool Locking part F Jig F1 First jig 40 First locking part F2 Second jig 41 Second locking part G Tool

Claims

An anti-theft bolt that can be screwed using a normal tool and cannot be loosened once screwed, but can be loosened by a special jig in an emergency. A bolt base having a male threaded portion on the outer peripheral portion, one end having a first serration, a bolt having a tool locking portion on the outer side, and a second serration on the inner side. A head body, a bolt body, and a shaft body that is mounted so as to straddle the bolt base body and that is rotatably and slidable with respect to the bolt base body, and a resilient body that slides on the shaft body in the sliding direction. It has a resilient spring that urges the force and a connecting screw body that is attached to one end of the shaft body and that can be screwed into the inside of the bolt head body. The second serration of the body It is formed so as to be in a locked state approaching the first serration of the base, and when the bolt head is rotated in a predetermined direction, the rotational force of the bolt head is formed to be transmitted to the bolt base, When the bolt head is rotated in the reverse direction with respect to a predetermined direction, the bolt head is idled so that the rotational force of the bolt head is not transmitted to the bolt base. First, a first locking portion for jig is formed, and a second locking portion for jig is formed on the connecting screw body, and the bolt base is bolted against the resilient force of the resilient spring. When the head is released, a gap space is formed between the first serration and the second serration, and the first locking portion of the first jig that can be inserted from the gap space is used to fix the connected screw body. Formed so that it can be locked to the second locking part for tools, The bolt head is formed so that it can be removed from the connecting screw body, and the bolt base can be rotated in reverse by the second locking portion of the second jig locked to the jig first locking portion of the bolt base. The anti-theft bolt characterized by comprising
2. The antitheft bolt according to claim 1, wherein a first locking portion of the first jig is provided at one end of one jig and a second locking portion of the second jig is provided at the other end. .