JP2006200614A - Fixing bolt and fixing nut detaching security tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing nut and fixing nut detaching security tool, wherein the head of a fixing bolt and a fixing nut can be easily exposed to the outside when a fixed material should be removed from an object even if the security tool is mounted on the head of the fixing bolt and the fixing nut to be in an embedded condition during fixing the fixed material to the object. <P>SOLUTION: Peripheral wall member locking pawls 24, 25 are arranged on a crowned member 20 which has a nut locking pawl to be locked to the lower end face of the fixing nut 4. A circular collar portion 32 having a cutout portion 33 is formed on the upper part of a peripheral wall member 30. Inside the peripheral wall member 30, a ring 34 is arranged in a loosely fitted condition. On a demounting tool 70, a push-down leg portion 72 is arranged which can be inserted into the cutout portion 33 to push down the ring 34. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention can be used when a fixed object is fixed to an object to be screwed with a fixing bolt, or when a fixed object is fixed to a bolt fixed to the object using a fixing nut. The present invention relates to a detachable security device for a fixing bolt and a fixing nut that protects an object to be fixed from theft.

When fixing parts such as automobile license plates and aluminum wheels to the vehicle body, or when fixing devices such as transformers and vending machines to the installation location, usually fixing them using fixing bolts or fixing nuts. Has been done.

In recent years, crimes of stealing only a license plate from the body of a parked car or the like are increasing. A person who commits this crime removes the fixing bolt using a commercially available device such as a driver and steals only the license plate in a short time.

In order to prevent theft cases that are performed by removing such fixing bolts and fixing nuts, the applicant of the present invention has already provided a fixing bolt and a fixing nut crime prevention device that does not expose the head of the fixing bolt or the fixing nut to the outside. It has been proposed (Japanese Patent Application No. 2004-364488).

FIG. 9 is an exploded perspective view showing the structure of the security nut for the fixing nut, and FIG. 10 is a cross-sectional view of the security device for the fixing nut in the mounted state.

9 and 10, F is a floor formed of concrete or the like, and 3 is this floor F.
It is a bolt partly embedded and fixed. Reference numeral 5 denotes an object to be fixed such as a vending machine or a transformer that is fixed to the floor F that is an object by the bolt 3 and the fixing nut 4. 4 b is a washer that comes into contact with the lower end surface of the fixing nut 4, and 10 is a spacer for forming a gap between the washer 4 b and the surface of the fixed object 5.

Reference numeral 20 denotes a crowning member that is crowned on the fixing nut 4, and 30 is a peripheral wall member that covers the outer surface of the crowning member 20. The crown member 20 is made of metal, and the peripheral wall member 30 is also made of metal. However, the material constituting the crown member 20 and the material constituting the peripheral wall member 30 are not limited to the above materials. Absent.

The crown member 20 includes a top plate portion 21 and a plurality of side wall portions 22 extending downward from the peripheral portion of the top plate portion 21 (in the direction of the nut 4 as viewed from the top plate portion 21) and the peripheral wall member locking. The nail | claw 24 and 25 are comprised.

The lower end portion of the side wall portion 22 is inserted into the space S formed by the spacer 10 between the fixing nut 4 and the washer 4b and the surface of the object 5 to be fixed to the lower end surface of the fixing nut 4 via the washer 4b. A locking claw 26 for abutting the nut is formed. Thus, spacer 1
0 is used as a space forming means arranged to form the gap S in which the nut locking claw 26 can be inserted. The space forming means is not limited to the spacer 10, and as already disclosed in Japanese Patent Application No. 2004-364488 by the applicant of the present application, the space forming means may be a spacer portion or a tapered portion integrally formed on the lower surface side of the fixing nut. Good.

The metallic crowning member 20 is formed in a state where the side wall portion 22 and the peripheral wall member locking claws 24, 25 are slightly opened so that the fixing member 4 and the washer 4b can be easily covered. ing.

A circular protrusion 31 is formed at the lower end of the inner peripheral wall surface of the peripheral wall member 30 so as to protrude inward along the entire periphery. By being pressed by the circular protrusion 31 of the peripheral wall member 30, the nut locking claw 26 of the crown member 20 maintains a state in which it is in contact with the lower end surface of the fixed nut 4 via the washer 4 b. Can do.

Here, as shown in FIG. 10, the peripheral wall member locking claws 24, 25 arranged on the elastic metal crown member 20 have a circular protrusion at the lower end portion of the peripheral wall member 30. It is formed so as to contact the upper surface portion of the portion 31. The peripheral wall member locking claws 24, 25 are circular projections 31.
Therefore, the peripheral wall member 30 attached to the crowning member 20 cannot be easily removed.

In the state shown in FIG. 10 in which the fixing member 4 and the peripheral wall member 30 are mounted on the fixing nut 4 as described above, it is extremely difficult to expose the fixing nut 4 to the outside.

In the security device for fixing nuts configured as described above, the peripheral wall member 30 and the crown member 20 can be easily removed by using a dedicated locking release tool 60 as shown in FIG.

The lock release tool 60 is a member having a hollow cylindrical shape as shown in FIGS. The outer diameter of the locking release tool 60 is selected to be a value that can be fitted inside the peripheral wall member 30 as shown in FIGS. 12 (a) and 12 (b). Further, the inner diameter of the locking release tool 60 is selected to be equal to or smaller than the inner diameter of the upper surface portion of the circular protrusion 31 of the peripheral wall member 30.

Such an unlocking tool 60 is inserted into the peripheral wall member 30 as shown in FIG.
As shown in FIG. 12 (b), when the tip portion is brought into contact with the upper surface portion of the circular protrusion 31, the engagement between the peripheral wall member locking claws 24, 25 of the crown member 20 and the circular protrusion 31. The combined state can be released. Accordingly, as shown in FIG. 12C, the peripheral wall member 30 can be separated from the fixing nut 4 together with the locking release member 60.

If the crown member 20 is completely exposed as shown in FIG. 12C, the crown member 20 can be easily detached from the fixing nut 4. Therefore, the fixing nut 4 can be easily exposed.

If the fixing nut 4 is exposed to the outside as described above, the fixing nut 4 can be easily removed using a general instrument such as a box wrench.
Japanese Patent Application No. 2004-364488

In the fixing nut security device described above, when the peripheral wall member 30 is removed using the locking release tool 60, the peripheral wall member 30 is removed while being held by hand as shown in FIG. Therefore, the following problems occur.

That is, like the fixing nut 4 that fixes the wheel H of the vehicle tire T shown in FIGS. 13 and 14, the crown member 20 and the peripheral wall member 30 are attached to the fixing nut 4 that is buried in the fixed state. In some cases, it can perform a crime prevention function. However,
When it is necessary to remove the fixing nut 4 such as when exchanging tires, even if the engagement state between the crown member 20 and the peripheral wall member 30 is released using the locking release tool 60, the peripheral wall member 30 and the wheel H Since the gap between the two is narrow, it becomes extremely difficult to remove the peripheral wall member 30 by hand.

In other words, when the fixing bolt and the fixing nut crime prevention device described above are attached to the head or the fixing nut of the fixing bolt that is buried in a state where the fixed object is fixed to the object,
When it becomes necessary to remove the fixing bolt or the fixing nut, there arises a problem that it becomes extremely difficult to remove the security device.

In order to solve the above problems, the present invention provides a detachable fixing nut for a fixing nut, which is composed of a fixing nut security device attached to the fixing nut and a mounting release tool for releasing the mounting state of the fixing nut security device. A security device for the fixing nut, wherein the fixing nut is secured to the bolt by the fixing nut that is screwed to the bolt to which the bolt fixed to the object can be inserted. Space forming means for forming a gap between the lower end surface of the object and the surface of the object to be fixed, a top plate portion, and a plurality of side wall portions extending downward from the peripheral edge portion of the top plate portion, A crowning member that crowns the fixing nut, wherein the lower end of the plurality of side wall portions includes a surface between the surface of the object to be fixed and a lower end surface of the fixing nut when the fixing nut is crowned. Locking claw for nut that can be inserted into the gap formed between A hollow cylindrical peripheral wall member that covers a formed crown member and an outer surface portion of the crown member that is crowned to the fixing nut, and is arranged in an inner direction at a lower end portion of an inner peripheral wall surface of the peripheral wall member. A circular protrusion is formed on the upper end of the inner peripheral wall surface, and is formed with a plurality of notches. A peripheral wall member formed with a circular flange having a peripheral portion, and the crown member is a peripheral wall member locking claw that engages with an upper surface portion of the circular protrusion of the peripheral wall member. The peripheral claw for the peripheral wall member extending downward from the peripheral edge portion of the top plate portion is formed, and the inside of the peripheral wall member has an outer diameter that is substantially the same as the inner diameter of the peripheral wall member. A ring having an inner diameter equal to or smaller than the inner diameter of the circular protrusion is disposed in a loosely fitted state, and the mounting / dismounting tool is the circle of the peripheral wall member. A bottom surface portion that can be inserted into an opening formed inside the collar portion is disposed at a lower portion of the main body, and the bottom surface portion extends outward from a peripheral edge of the plurality of the circular collar portions. A plurality of engaging arm portions that can be fitted to the respective notches are formed, and at the distal end portion of the engaging arm portion is a pressing leg portion that extends downward in the lead-down direction, the pressing leg The total length is selected so that the total length of the total length of the portion and the thickness of the ring is equal to or less than the distance between the upper edge portion of the circular protrusion of the peripheral wall member and the lower edge portion of the circular flange portion. A pressing leg portion is provided. Here, the space forming means may be a spacer through which the fixing bolt that contacts the lower end surface of the fixing nut can be inserted, and the space forming means is fixed to the lower surface side of the fixing nut. The taper part integrally formed with the nut may be sufficient.

In order to solve the above problems, the present invention is composed of a fixing bolt crime prevention device to be attached to the head of the fixing bolt, and a mounting release tool for releasing the mounting state of the fixing bolt crime prevention device. A detachable security device for a fixing bolt, wherein the security device for the fixing bolt is fixed to an object having a female screw part for screwing a fixed object through which the fixing bolt can be inserted with the fixing bolt with the fixing bolt. A space forming means for forming a gap between the lower end surface of the head of the fixing bolt and the surface of the fixed object, and a plurality of portions extending downward from the top plate portion and the peripheral portion of the top plate portion. A plurality of side wall portions, and a crowning member that is crowned on the head of the fixing bolt, wherein the lower end portions of the plurality of side wall portions are crowned on the head of the fixing bolt, It is formed between the surface of the fixed object and the lower end surface of the head of the fixing bolt. And a hollow cylindrical peripheral wall member that covers an outer surface of the crown member that is crowned on the head of the fixing bolt. A circular protrusion is formed at the lower end portion of the inner peripheral wall surface of the peripheral wall member so as to protrude inwardly and presses the side wall portion of the crown member, and the upper end portion of the inner peripheral wall surface is formed in the inner direction. And a peripheral wall member formed with a circular flange having a plurality of notches, and the crown member includes the circular protrusion of the peripheral wall member. A locking claw for the peripheral wall member that engages with the upper surface portion of the portion, and a locking claw for the peripheral wall member that extends downward from the peripheral edge of the top plate portion is formed on the inner side of the peripheral wall member, A ring having an outer diameter that is substantially the same as the inner diameter of the peripheral wall member and whose inner diameter is equal to or smaller than the inner diameter of the circular protrusion is arranged in a loosely fitted state. In the mounting release tool, a bottom surface portion that can be inserted into an opening formed inside the circular flange portion of the peripheral wall member is disposed at a lower portion of the main body, and the bottom surface portion has an outer side from the periphery thereof. A plurality of engaging arm portions that extend in the direction and can be fitted into the plurality of cutout portions of the circular flange portion, A pressing leg portion extending downward, wherein the total length of the entire length of the pressing leg portion and the thickness of the ring is such that the upper edge portion of the circular projection portion of the peripheral wall member and the lower edge of the circular flange portion A pressing leg portion whose entire length is selected so as to be equal to or less than the distance to the portion is provided. Here, the space forming means may be a spacer through which the fixing bolt contacting the lower end surface of the head of the fixing bolt can be inserted.

According to the present invention, it is necessary to remove the object to be fixed from the object even if the security device is attached to the head or the fixing nut of the fixing bolt that is buried when the object is fixed to the object. In this case, the head of the fixing bolt and the fixing nut can be easily exposed to the outside.

  Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 are views showing the configuration of the first embodiment of the present invention, FIG. 1 is a perspective view, FIG. 2 is a cross-sectional perspective view showing the internal configuration of the peripheral wall member 30, and FIG. 3 is shown in FIG. 3 is a cross-sectional view of the crown member 20 and the peripheral wall member 30. FIG.

1 to 3, the same reference numerals as those in FIGS. 9 and 10 showing the conventional example described above indicate the same parts, and the description thereof will be omitted.

The difference between the first embodiment and the conventional example is the configuration of the peripheral wall member 30 and the configuration of the mounting / dismounting tool 70 shown in FIGS. 1 and 2 used to remove the peripheral wall member 30. The configuration of the peripheral wall member 30 and the mounting release tool 70 will be described with reference to FIGS. 1 and 2.

As shown in FIG. 2, a circular protrusion 31 similar to the conventional example is formed at the lower end portion of the inner peripheral wall surface of the peripheral wall member 30. In the first embodiment, a circular flange 32 that protrudes inwardly from the upper end of the inner peripheral wall surface of the peripheral wall member 30 is disposed. A plurality of notches 33 are formed in the circular flange 32 as shown in FIG.

Further, in the first embodiment, as shown in FIG. 2, the ring 34 is disposed between the circular protrusion 31 and the circular flange 32 in a loosely fitted state. The outer diameter of the ring 34 is such that the peripheral wall member 3
A value that is substantially the same as the inner diameter of 0 is selected, and the inner diameter is selected to be a value that is equal to or smaller than the inner diameter of the circular protrusion 31. Therefore, the ring 34 is disposed inside the peripheral wall member 30 so as to be movable in the vertical direction between the circular protrusion 31 and the circular flange 32.

The mounting release tool 70 has a bottom surface portion that can be inserted into an opening formed inside the circular collar portion 32, and the shape of the main body is a shape that can be easily held by hand. A plurality of engagement arm portions 71 that extend outward from the periphery of the mounting release tool 70 and that can be fitted into the plurality of cutout portions 33 formed in the circular flange portion 32. Is formed.

A pressing leg portion 72 extending downward in the lead-down direction is provided at each distal end portion of the plurality of engaging arm portions 71.
Is arranged.

The total length of the pressing leg portion 72, that is, the distance from the lower end of the pressing leg portion 72 to the upper surface of the engaging arm portion 71, is the total length of this distance and the thickness of the ring 31. And the distance from the lower edge of the circular flange 32 is selected.

Therefore, if the bottom surface portion of the mounting release tool 70 is inserted into the peripheral wall member 30 with the cutout portion 33 and the engagement arm portion 71 being combined, the engagement arm portion 71 and the pressing leg portion 72 are inserted. Is in a rotatable state in a horizontal plane below the circular flange 32.

  Next, the operation of the first embodiment configured as described above will be described with reference to FIGS.

First, when the crown member 20 and the peripheral wall member 30 are attached to the fixing nut 4, FIG.
As shown in (c) to (c), the peripheral wall member 30 is mounted after the crowning member 20 is mounted on the fixing nut 4 as in the conventional example. In the mounting process of the peripheral wall member 30, the ring 34 moves upward in the peripheral wall member 30 while being in contact with the crowning member 20.

When removing the crown member 20 and the peripheral wall member 30 attached to the fixing nut 4 in this way, as shown in FIGS. 5 (a) and 5 (b), the body of the attachment release tool 70 is held by hand. Then, the position of the pressing leg 72 is adjusted to the position of the notch 33 and inserted into the peripheral wall member 30 until it stops. In the state shown in FIG. 5B in which the mounting release tool 70 is inserted in this way, the peripheral wall member locking claws 24 and 25 are moved inward by being pressed by the inner surface of the ring 34, and this peripheral wall member The engagement state between the locking claws 24 and 25 and the circular protrusion 31 is released.

Next, as shown in FIG. 6 (a), the attachment release tool 70 is rotated in the direction A, and the engagement arm portion 7 is rotated.
The position 1 is shifted from the position of the notch 33 so that the engaging arm 71 can come into contact with the lower edge of the circular flange 32 as shown in FIG. In this state, as shown in FIG. 7, the mounting release tool 70 is moved away from the fixing nut 4 to remove the peripheral wall member 30. If the outer wall member 30 is detached, the crown member 20 can be easily detached from the fixing nut 4 and the fixing nut 4 can be exposed to the outside.

As described above, in the first embodiment, it is possible to remove the peripheral wall member 30 without touching the hand. Therefore, even if the fixing nut 4 is in the embedded state, the peripheral wall member 30 and the crowning member 20 can be easily removed and the fixing nut 4 can be exposed to the outside.

In the above description, the fixing nut 4 is attached to the crown member 20 and the peripheral wall member 30 according to the first embodiment.
However, the crown member 20 and the peripheral wall member 30 according to the first embodiment can be screwed onto an object such as a floor F as shown in FIG. Even when the fixed object 2 is fixed with the fixing bolt 2, it can be mounted on the head 2 a of the fixing bolt 2. In FIG. 8, 23 is a bolt locking claw having the same configuration as the nut locking claw 26 shown in FIG. 3, and 2b is a washer.

It is a perspective view which shows the structure of Example 1 of this invention. It is a cross-sectional perspective view which shows the structure of Example 1 of this invention. It is sectional drawing which shows the structure of Example 1 of this invention. It is operation | movement explanatory drawing of Example 1 of this invention. It is operation | movement explanatory drawing of Example 1 of this invention. It is operation | movement explanatory drawing of Example 1 of this invention. It is operation | movement explanatory drawing of Example 1 of this invention. It is explanatory drawing of a structure of Example 1 of this invention. It is a perspective view which shows the structure of the conventional security device for fixing nuts. It is sectional drawing which shows the structure of the conventional security device for fixing nuts. It is explanatory drawing of the conventional security device for fixing nuts. It is explanatory drawing of the conventional security device for fixing nuts. It is explanatory drawing of the conventional security device for fixing nuts. It is explanatory drawing of the conventional security device for fixing nuts.

Explanation of symbols

2 Fixing bolt 2a Head 2b, 4b Washer 3 Bolt 4 Fixing nut 5 Fixed object 10 Spacer 20 Crowning member 21 Top plate part 22 Side wall part 23 Bolt locking claws 24, 25 Peripheral wall member locking claws 26 For nuts Locking claw 30 Peripheral wall member 31 Circular protrusion 32 Circular flange 33 Notch 34 Ring 70 Demounting tool 71 Engaging arm 72 Pressing leg A Direction F Floor S Cavity

Claims (5)

A detachable security device for a fixed nut, comprising a security device for a fixed nut to be attached to the fixed nut and a mounting release tool for releasing the mounting state of the security device for the fixed nut,
The security device for the fixing nut is
When a fixed object through which a bolt fixed to an object can be inserted is fixed to the bolt with the fixing nut screwed to the bolt, the lower end surface of the fixing nut and the surface of the fixed object are fixed. A space forming means for forming a void;
A crown member having a top plate portion and a plurality of side wall portions extending downward from a peripheral edge portion of the top plate portion, and is attached to the fixing nut, and is a lower end portion of the plurality of side wall portions. And a locking claw for a nut that can be inserted into a gap formed between the surface of the object to be fixed and the lower end surface of the fixing nut when the fixing nut is crowned. A wearing member;
A hollow cylindrical peripheral wall member that covers an outer surface portion of the crown member that is crowned to the fixing nut, and is protruded inwardly at a lower end portion of an inner peripheral wall surface of the peripheral wall member. A circular protrusion that presses the side wall is formed, and a circular flange having a plurality of notches is formed at the upper end of the inner peripheral wall surface. A peripheral wall member,
The crown member is a peripheral wall member locking claw that engages with an upper surface portion of the circular projection of the peripheral wall member, and the peripheral wall member engagement that extends downward from the peripheral edge of the top plate portion. A toe is formed,
On the inner side of the peripheral wall member, a ring having substantially the same outer diameter as the inner diameter of the peripheral wall member and having an inner diameter equal to or smaller than the inner diameter of the circular protrusion is provided in a loosely fitted state.
The demounting tool is
A bottom surface portion that can be inserted into an opening formed inside the circular collar portion of the peripheral wall member is disposed at a lower portion of the main body,
The bottom surface portion extends outward from the periphery thereof, and a plurality of engagement arm portions that can be fitted into the plurality of cutout portions of the circular flange portion are formed,
The distal end portion of the engagement arm portion is a pressing leg portion extending downward in the lead-down direction, and the total length of the entire length of the pressing leg portion and the thickness of the ring is the circular shape of the peripheral wall member. A detachable crime prevention for a fixing nut, characterized in that a pressing leg portion whose entire length is selected so as to be equal to or less than the distance between the upper edge portion of the protruding portion and the lower edge portion of the circular flange portion is provided. Ingredients. The detachable crime prevention device for a fixing nut according to claim 1, wherein the space forming means is a spacer through which the fixing bolt contacting the lower end surface of the fixing nut can be inserted. The detachable crime prevention device for a fixing nut according to claim 1, wherein the space forming means is a tapered portion integrally formed with the fixing nut on a lower surface side of the fixing nut. A detachable security device for a fixing bolt, comprising a security device for a fixing bolt to be attached to the head of the fixing bolt, and a mounting release tool for releasing the mounting state of the security device for the fixing bolt,
The security device for the fixing bolt is
When a fixed object through which the fixing bolt can be inserted is fixed to an object having an internal thread portion screwed into the fixing bolt with the fixing bolt, a lower end surface of the head of the fixing bolt and a surface of the fixed object A space forming means for forming a gap between
A crown member having a top plate portion and a plurality of side wall portions extending downward from a peripheral edge portion of the top plate portion, and is attached to a head of the fixing bolt, wherein the plurality of side wall portions For the bolt that can be inserted into the gap formed between the surface of the fixed object and the lower end surface of the head of the fixing bolt when the head is fixed to the head of the fixing bolt. A crown member on which locking claws are formed;
A hollow cylindrical peripheral wall member that covers an outer surface portion of the crown member that is crowned on a head of the fixing bolt, and is protruded inwardly at a lower end portion of an inner peripheral wall surface of the peripheral wall member. A circular protrusion having a plurality of notches is formed at the upper end of the inner peripheral wall surface, the circular protrusion having a plurality of cutouts. A peripheral wall member formed with a portion,
The crown member is a peripheral wall member locking claw that engages with an upper surface portion of the circular projection of the peripheral wall member, and the peripheral wall member engagement that extends downward from the peripheral edge of the top plate portion. A toe is formed,
On the inner side of the peripheral wall member, a ring having substantially the same outer diameter as the inner diameter of the peripheral wall member and having an inner diameter equal to or smaller than the inner diameter of the circular protrusion is provided in a loosely fitted state.
The demounting tool is
A bottom surface portion that can be inserted into an opening formed inside the circular collar portion of the peripheral wall member is disposed at a lower portion of the main body,
The bottom surface portion extends outward from the periphery thereof, and a plurality of engagement arm portions that can be fitted into the plurality of cutout portions of the circular flange portion are formed,
The distal end portion of the engagement arm portion is a pressing leg portion extending downward in the lead-down direction, and the total length of the entire length of the pressing leg portion and the thickness of the ring is the circular shape of the peripheral wall member. A detachable crime prevention for fixing bolts, characterized in that a pressing leg having a total length selected so as to be less than or equal to the distance between the upper edge of the projection and the lower edge of the circular collar is provided. Ingredients. The detachable crime prevention device for a fixing bolt according to claim 4, wherein the space forming means is a spacer through which the fixing bolt contacting the lower end surface of the head of the fixing bolt can be inserted.

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