JPH11114841A - Co-rotation prevention device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a co-rotation prevention device capable of easily removing a screw component after completion of fastening. SOLUTION: A main body 11 having a flat-bar-shaped mounting hole 11a, and a wrench main body 12 rotatably mounted in the mounting hole 11a of the main body 11 and detachably engaged with a nut.
a wrench 12 having a and a wrench 1 having a base end
A lever connected to a handle 12b of the eyeglass wrench 12 via a pin 14 so as to be rotatable about an axis perpendicular to the center of rotation of the body 2 and swingable so that the tip can approach and separate from the main body 11. A lever receiver 16 provided on the main body 15 and having a tapered fitting groove detachably fitted with a tapered portion 15a in the middle of the lever 15 so as to restrain the rotation of the eyeglass wrench 12; A stopper 17 is provided on the main body 11 and detachably engages with a hook at the tip of the lever 15 to restrain the swing of the lever.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing co-rotation when fastening a threaded part.

[0002]

2. Description of the Related Art When screwing a bolt as a male screw part and a nut as a female screw part, if the nut rotates (co-rotates) with the rotation of the bolt, the nut and the bolt are fastened. Can not be done. Therefore, for example, as shown in FIGS. 8 and 9, the bolts 103 are passed through the members 101 and 102, and nuts 104 and 105 are fastened to both ends of the bolts 103, respectively.
When fixing the nuts 01 and 102, a wrench (or wrench) 111 is mounted on the nut 104, and a hydraulic wrench 112 is mounted on the nut 105 and rotated. Sufficient tightening torque can be obtained by suppressing the member 101 via the handle.

[0003]

However, the nuts 104 and 105 are attached to the through bolt 103 as described above.
Is fastened, the reaction force associated with the fastening is accumulated and stored in the contact portion between the handle of the spanner 111 and the member 101.
When removing the wrench, a great deal of labor is required to remove the spanner 111, and the removal of the spanner 111 is troublesome.

[0004] In view of the above, an object of the present invention is to provide a co-rotation prevention device capable of easily removing a screw component after fastening is completed.

[0005]

A counter-rotating device according to the present invention for solving the above-mentioned problems comprises a flat bar-shaped main body having a mounting hole, and a rotatable mounting hole provided in the main body. An engaging member that is provided and removably engages with the female thread component; and a base end connected to the engaging member such that the base end can rotate around an axis perpendicular to the center of rotation of the engaging member. A lever that can swing so that the tip can move toward and away from the main body, and a fitting groove provided on the main body and detachably fitted to the lever so as to restrict the rotation of the engaging member. And a lever receiver having the following.

In the above-described co-rotation prevention device, the fitting groove of the lever receiver is tapered so as to become wider toward the side facing the lever, while the fitting portion of the lever with the lever receiver is formed of the lever. It is characterized in that it is inclined in a tapered shape so as to become smaller toward the receiving side.

In the above-mentioned co-rotation prevention device, a stopper for detachably fixing the lever to the main body so as to restrain the swing of the lever is provided.

In the above-mentioned co-rotation prevention device, the engaging member is disposed on the engaging member so as to be able to approach and separate from the external thread component.
A locking member that can bite into the male screw component, a locking member separating unit that separates the locking member from the male screw component when the tip of the lever separates from the main body, and a tip of the lever. A locking member approaching means for causing the locking member to approach the male screw component when the body comes close to the main body;

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a co-rotation prevention device according to the present invention will be described with reference to FIGS. FIG. 1 is a plan view showing the schematic structure, and FIG.
FIG. 3 is a sectional view taken along line III-III of FIG.

As shown in FIGS. 1 and 2, a mounting hole 11a is formed near one end of a main body 11 having a flat bar shape.
The other end side of the wrench body 12a of the wrench body 12a of the eyeglass wrench 12, which is an engaging member having a handle 12b on one end side of the outer peripheral surface of the cylindrical wrench body 12a, is rotatably inserted into the mounting hole 11a of the main body 11. Have been. Glasses wrench 12
A snap ring 13 is fitted to an outer peripheral surface portion of the wrench main body 12a protruding from the mounting hole 11a of the main body 11, so that the eyeglass wrench 12 rotates without coming off with respect to the main body 11. Is available.

[0011] As shown in FIGS.
The handle 12b is provided with a pin 14 so that the base end of a lever 15 having a rod shape having a width smaller than the width of the main body 11 can rotate around an axis in a direction orthogonal to the rotation center of the glasses wrench 12.
Are connected by That is, the lever 15 is swingably connected to the glasses wrench 12 so that the tip thereof can be moved toward and away from the main body 11.

As shown in FIGS. 2 and 3, a wedge-shaped tapered portion 15a which is tapered so that the size in the width direction becomes smaller toward the main body 11 is provided in the middle portion of the lever 15 in the longitudinal direction. Is formed. The lever 1 is attached to a portion of the main body 11 of the lever 15 facing the tapered portion 15a.
A lever receiver 16 is provided which has a fitting groove 16a which is inclined in a tapered shape so as to be wider toward the side opposite to 5 and which is detachably fitted to the tapered portion 15a of the lever 15.

As shown in FIGS. 1 and 2, a hook 15b is provided at the tip of the lever 15 to protrude therefrom. On the other end side of the main body 11, a stopper 1 that detachably engages with the hook 15b of the lever 15 to restrain the swing of the lever 15
7 are provided. The stopper 17 includes a pair of brackets 17a erected on the other end side of the main body 11, and a support pin 1 rotatably supported between the brackets 17a.
7b, and a holding hook 17 integrally attached to the support pin 17b and capable of engaging with the hook 15b of the lever 15.
c and the holding hook 17 on the hook 15b of the lever 15.
c and a knob 17e capable of rotating the support pin 17b so as to release the hook 15b of the lever 15 from the holding hook 17c. Has become.

In such a co-rotation prevention device, by using the wrench (or wrench) 111 described in the above-mentioned prior art, it is possible to prevent co-rotation and fasten with high torque. That is, for example, similarly to the description of the prior art described above, the bolts 103 are passed through the members 101 and 102, and the nuts 104 and 105 are fastened to both ends of the bolts 103, respectively.
When fixing the wrench 1 and 102, the wrench body 12a of the eyeglass wrench 12 is attached to the nut 104, and the nut 105
A hydraulic wrench 112 is mounted on the
Wrench 1
2, pin 14, lever 15, lever receiver 16, body 11
Sufficient tightening torque can be obtained by suppressing with the member 101 through the side part.

When the nuts 104 and 105 are fastened to the through bolt 103 in this manner, the side of the body 11 and the member 1
The reaction force due to the fastening is accumulated and stored in the contact portion with 01. Therefore, when the fastening is completed, as shown in FIG. 4, the knob 17 e of the stopper 17 is operated to release the holding hook 17 c from the hook 15 b of the lever 15, and then the tip of the lever 15 is pulled away from the main body 11. When the lever 15 is swung and detached from the lever receiver 16, the handle 12b of the eyeglass wrench 12 is moved to the lever 15 and the lever receiver 16.
Since the wrench main body 12a of the eyeglass wrench 12 is rotatably connected to the main body 11 while being released from the integral connection with the main body 11 through the main body 11, as shown in FIG. When the lever 15 is removed from the main body 11, the reaction force between the contact portion between the side portion of the main body 11 and the member 101 disappears. 11 can be easily rotated with respect to the wrench body 12a of the glasses wrench 12, and the wrench body 12a of the glasses wrench 12 can be easily removed from the nut 104.

Therefore, according to such a co-rotation prevention device, not only the co-rotation at the time of fastening the screw component can be prevented, but also the removal after the completion of the fastening can be easily performed.

Further, since the lever 15 and the main body 11 are connected by fitting the tapered portion 15a of the lever 15 into the tapered fitting groove 16a of the lever receiver 16, a reaction force accompanying the fastening is applied. However, the removal of the lever 15 from the lever receiver 16 can be performed relatively easily.

Further, since the swing of the lever 15 is restrained by the stopper 17, the lever 15 is reliably prevented from being accidentally detached from the lever receiver 16 when the reaction force accompanying the fastening is applied. can do.

A second embodiment of the co-rotation prevention device according to the present invention will be described with reference to FIGS. FIG.
Is a partially omitted plan view showing the schematic structure, and FIG.
FIG. 7 is a sectional view taken along line VII-VII of FIG. However, the same members as those in the first embodiment described above are denoted by the same reference numerals as those used in the description of the first embodiment, and the description thereof is omitted.

As shown in FIG. 6 and FIG.
The wrench body 1 is provided on one end surface side of the wrench body 12a.
A ring 18 having an inner diameter substantially equal to 2a and having one end surface and the other end surface tapered so as to be sharpened inward is provided. The wrench main body 12a and a pair of guide blocks 19a, 19b attached to one end side of the handle 12b are supported via slide shafts 18a, 18b so as to be slidable by a predetermined length along the longitudinal direction of the handle 12b. .

As shown in FIGS. 6 and 7, the guide block 1
A compression coil spring 20 is provided between the ring 9 and the ring 18 so as to surround the slide shaft 18b therein.
The ring 18 is urged so that the ring 18 abuts on a (the center of the wrench main body 12a coincides with the center of the ring 18). One end of a wire 21 is connected to the slide shaft 18 b of the ring 18. The middle of the wire 21 is slidably supported by a guide tool 22 provided on the handle 12b of the glasses wrench 12. The other end of the wire 21 is connected to a tensioner 23 provided on the lever 15.
The tensioner 23 adjusts the tension of the wire 21 by rotating its adjustment screw 23a, that is, the tension of the slide shaft 18 of the ring 18.
b can be adjusted.

That is, when the lever 15 is swung so that the lever 15 is fitted to the lever receiver 16, the wire 21 is pulled toward the tensioner 23, and the ring 18 is moved by the guide block so that the compression coil spring 20 is pressed and contracted. 1
8b, while the lever 15 is swung so as to remove the lever 15 from the lever receiver 16, the wire 2
1 is loosened, and the compression coil spring 20 causes the ring 18 to contact the guide block 18a.
The ring 18 can be biased so that the center of the wrench body 12a and the center of the ring 18 coincide with each other.

In this embodiment, the locking member is constituted by the ring 18 and the like, and the locking member separating means is constituted by the compression coil spring 20 and the like.
2. The locking member proximity means is constituted by the tensioner 23 and the like.

In such a co-rotation prevention device, similarly to the above-described embodiment, the bolts 103 are passed through the members 101 and 102, and the nuts 104 and 105 are fastened to both ends of the bolt 103. These members 1
When fixing the levers 01 and 102, the lever 15 is swung so that the lever 15 is removed from the lever receiver 16,
That is, with the center of the ring 18 aligned with the center of the wrench body 12a of the eyeglass wrench 12, the eyeglass wrench 1
After the second wrench body 12a is mounted on the nut 104, the lever 15 is swung so as to fit the lever 15 into the lever receiver 16 and the ring 18 is pulled via the wire 21. The inner peripheral portion on the side approaches the through bolt 103 and bites into the thread groove of the bolt 103 to be fixed and held to the through bolt 103, so that even if the operator does not hold the device by hand,
The nut 105 can be fastened while preventing the nut 104 from turning around in the same manner as in the above-described embodiment.

After the fastening is completed as described above, the lever 15 is detached from the lever receiver 16 so as to be removed.
Is swung, as in the above-described embodiment,
The reaction force between the side portion of the main body 11 and the contact portion between the member 101 disappears, and the urging force of the compression coil spring 20 caused by the loosening of the wire 21 causes the ring 18 The ring 18 is separated from the through bolt 103 so that the centers of the rings 18 coincide with each other, the bite of the ring 18 into the bolt 103 is released, and the wrench body 12a of the eyeglass wrench 12 can be removed from the nut 104.

Therefore, in the present embodiment, the same effect as that of the above-described embodiment can be obtained, and at the same time, it can be fixed and held to the screw component. Fastening work can be performed more efficiently than in the case of the present invention.

More specifically, for example, when retightening bolts when assembling the lining material after excavating with a tunnel excavator, both ends of the through bolts are largely separated and a heavy hydraulic wrench is used at a high place. Conventionally, two workers had to perform the fastening work in order to use it. However, if the co-rotation prevention device as described above is used, only one worker can perform the fastening work. Thus, the working efficiency can be greatly improved.

[0028]

In the co-rotation prevention device according to the present invention, a flat bar-shaped main body having a mounting hole is provided rotatably in the mounting hole of the main body, and is detachably engaged with a female thread part. An engaging member and a base end are connected to the engaging member so that the base end can rotate around an axis perpendicular to the center of rotation of the engaging member, and a tip end swings so as to be able to approach and separate from the main body. A movable lever, and a lever receiver provided on the main body and having a fitting groove detachably fitted to the lever so as to restrain the rotation of the engaging member; When the lever is swung so as to separate the distal end of the main body from the main body and is released from the lever receiver, the engaging member is released from the integral connection with the main body via the lever and the lever receiver, and the engaging member is released from the main body. Is rotatably connected to , With the removal of the lever from the lever receiving the reaction force between the contact portion of the side of the body comes to disappear. For this reason, it is possible to easily rotate the main body relative to the engagement member so as to separate the side portions of the main body, so that the engagement member can be easily removed from the female screw part.

Also, the fitting groove of the lever receiver is inclined in a tapered shape that becomes wider toward the side facing the lever, while the fitting portion of the lever with the lever receiver becomes smaller toward the lever receiving side. The lever can be relatively easily detached from the lever receiver even when a reaction force accompanying the fastening is applied.

Further, since a stopper for detachably fixing the lever to the main body so as to restrain the swing of the lever is provided, when a reaction force accompanying fastening is applied,
It is possible to reliably prevent the lever from accidentally coming off the lever receiver.

The engaging member is provided on the engaging member so as to be able to approach and separate from the male screw component, and the locking member is capable of biting into the male screw component, and the locking member is provided when the tip of the lever separates from the main body. Locking member separating means for separating the locking member from the male screw component, and locking member proximity means for bringing the locking member closer to the male screw component when the tip of the lever approaches the main body. Since the locking member is engaged, the engaging member is engaged with the female threaded component with the lever distal end separated from the main body, and then the lever distal end is brought close to the main body, so that the locking member bites into the external threaded component. Since it can be fixed and held, the fastening operation can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a plan view showing a schematic structure of a first embodiment of a co-rotation prevention device according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is an operation explanatory view of FIG. 2;

FIG. 5 is an operation explanatory view following FIG. 4;

FIG. 6 is a partially omitted plan view illustrating a schematic structure of a second embodiment of the co-rotation prevention device according to the present invention.

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6;

FIG. 8 is an explanatory view of a conventional case for preventing co-rotation when fastening a screw part.

9 is a sectional view taken along the line IX-IX in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Main body 11a Mounting hole 12 Glass wrench 12a Wrench main body 12b Handle 13 Snap ring 14 Pin 15 Lever 15a Taper part 15b Hook 16 Lever receiver 16a Fitting groove 17 Stopper 17a Bracket 17b Support pin 17c Pressing hook 17d Spring 17e Knob 18 Ring 18b Slide shaft 19a, 19b Guide block 20 Compression coil spring 21 Wire 22 Guide tool 23 Tensioner 23a Adjustment screw

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoichi Miura Inside Taisei Construction Co., Ltd. 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo

Claims (4)

[Claims] A main body having a mounting hole in the shape of a flat bar, an engaging member rotatably provided in the mounting hole of the main body, and removably engaging with a female thread part; A lever connected to the engaging member so as to be rotatable around an axis orthogonal to the center of rotation of the engaging member, and capable of swinging so that a tip can approach and separate from the main body; And a lever receiver having a fitting groove detachably fitted to the lever so as to restrain the rotation of the engaging member. 2. The fitting groove of the lever receiver inclines in a tapered shape that becomes wider toward the side facing the lever, while the fitting portion of the lever with the lever receiver becomes smaller toward the lever receiving side. The co-rotation prevention device according to claim 1, wherein the device is inclined in a tapered shape. 3. The co-rotation prevention device according to claim 1, further comprising a stopper for detachably fixing the lever to the main body so as to restrain the swing of the lever. A locking member disposed on the engaging member so as to be able to approach and separate from the external thread component, and a locking member capable of biting into the external thread component; Locking member separating means for separating the locking member from the male screw component; and locking member proximity means for bringing the locking member closer to the male screw component when the tip of the lever approaches the main body. The co-rotation prevention device according to any one of claims 1 to 3, which is provided.