JP4360670B2 - Bolt stopper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a bolt stopper that mainly prevents the rotation of bolts used at work sites such as bridges, steel towers, and installed steel structures, and more specifically, tightens or relaxes bolts and nuts using a steel connection wrench. The present invention relates to a useful bolt stopper that can be easily and smoothly tightened and loosened without rotating the bolt and nut together.
[0002]
[Prior art]
Conventionally, a dedicated wrench (steel connection wrench) has been used to tighten and loosen bolts and nuts at work sites such as construction steel structures. As such a wrench, for example, a drive nut portion that is rotationally driven by the drive socket portion, and a reaction force receiving nut that is rotatable relative to the drive nut portion and that is prevented from rotating by the reaction force socket of the wrench. And a connecting sleeve portion rotatably assembled to the reaction force receiving nut portion, and the nut is aligned and fastened in a drive socket portion that is rotationally driven (see, for example, Patent Document 1).
[Patent Document 1]
Japanese Patent Laid-Open No. 10-128628
[Problems to be solved by the invention]
However, in the tightening work using the above-described conventional steel connection wrench, the nut and the bolt rotate together in the drive socket portion at the start of the tightening, so that the tightening can be performed well. There is a problem that can not be.
[0004]
The present invention has been made in view of such conventional problems, and an object thereof is to provide a useful bolt stopper that can be easily and smoothly tightened and loosened without the bolt and the nut rotating together. Is.
[0005]
[Means for Solving the Problems]
In order to solve the conventional problems as described above and achieve the intended purpose, the configuration as the gist of the present invention includes an exterior body attached to a bolt or nut, and the bolt or the assembly assembled to the exterior body. A bolt stopper comprising a lock means for holding the nuts in a non-rotatable state , wherein the lock means is a lock operation element that is movably mounted on the exterior body, and a rotation operation of the lock operation element. A movable body that is displaced in accordance with the movable body, a sandwiching ring that is displaceable in a radial direction in accordance with a displacement operation of the movable body, and a bolt or nut that protrudes from the exterior body and is engaged by adjacent bolts or nuts. The bolt stopper is provided with a reaction force arm.
[0006]
The holding ring includes a pair of holding arms that are assembled to form a lock hole at the center of a mounting recess formed in the exterior body, and a biasing force in a direction of expanding the diameter of the holding arm. It is preferable to include an elastic member to be urged and a sphere to reduce the diameter of the pair of holding arms against the urging force of the elastic member.
[0007]
The bolt stopper of the present invention configured as described above includes an exterior body attached to the bolt or nut, and a lock unit that is assembled to the exterior body and holds the bolt or nut in a non-rotatable state. The lock means includes: a lock operation element that is movably mounted on the exterior body; a movable body that is displaced according to a rotation operation of the lock operation element; and a displacement operation of the movable body. The outer body is provided with a sandwiching ring that is displaceable in a radial direction according to the position and a reaction arm that protrudes from the outer body and is engaged with an adjacent bolt or nut. By simply fitting the nuts on the bolts or nuts and rotating the locking operator, the holding ring can be reduced in diameter so that the outer periphery of the bolts or nuts can be held in a non-rotatable state.
[0008]
The sandwiching ring is biased in a direction in which the sandwiching arm is expanded in diameter, and a pair of sandwiching arms assembled to form a lock hole at the center of the mounting recess formed in the exterior body. An elastic member to be squeezed and a spherical body to reduce the diameter of the pair of holding arms against the urging force of the elastic member, thereby fitting the exterior body on a bolt or nut to If it rotates, the fastening runner is driven to rotate while the bolts are locked to the pair of holding arms in conjunction with the rotation of the locking operator. A force acts in the direction of rotation and can prevent co-rotation with nuts.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings. A in the figure is a bolt stopper according to the present invention, the bolt stopper A, as shown in FIGS. 1 and 2, the outer package 1 is covered state to the head of the bolt B (see FIG. 6) And a locking means 2 assembled to the exterior body 1.
[0010]
The exterior body 1 is formed into a lid shape from an appropriate material such as steel, and has a reaction arm 1a projecting on the outer peripheral surface and a locking means 2 via an annular mounting recess 1b on the inner peripheral surface. It has.
[0011]
As shown in FIG. 3, the lock unit 2 is displaced in the depth direction (vertical direction) in accordance with the lock operation element 2 a protruding from the top surface of the exterior body 1 and the rotation operation of the lock operation element 2 a. A movable body 2b, a holding ring 2c that is displaced in the radial direction (left-right direction) in the exterior body 1 in accordance with a displacement operation of the movable body 2b, and a retaining ring 2d that prevents the holding ring 2c from coming off are provided. It will be.
[0012]
The lock operation element 2a is made of, for example, a hexagonal bolt, and is threadably engaged with a spiral hole 1c formed on the top surface of the exterior body 1 such that the screw portion 2a ₂ side penetrates into the exterior body 1 (long). The pressing force on the movable body 2b can be increased according to the above.
[0013]
The movable body 2b is made of an appropriate material such as a metal plate, and is pressed by the lock operation element 2a to push the spheres 4 and 4 described later with equal force.
[0014]
The sandwiching ring 2c is composed of a pair of sandwiching arms 2c ₁ and 2c ₁ that are assembled relative to each other in an attachment recess 1b (see FIG. 2) formed in the exterior body 1, and is attached to the outer peripheral edge. Slope grooves 2c ₂ and 2c ₂ that incline toward each other, and non-slip grooves 2c ₄ that are engraved on the inner peripheral surface so that even a round bolt can be held.
[0015]
The holding arms 2c ₁ and 2c ₁ have a semicircular arc shape, and form an annular lock hole 1d (see FIG. 2) in the center of the mounting recess 1b by facing each other. It is assembled to be displaced in the radial direction in conjunction with the turning operation. Incidentally, the lock hole 1d has a rhombus shape so that it can be clamped even by a square or round bolt.
[0016]
As shown in FIG. 5, the slope grooves 2c ₂ and 2c ₂ are used for positioning spheres 4 and 4 described later so as to be displaceable. When the movable body 2b is at a predetermined position, the holding arms 2c ₁ and 2c ₁ are positioned. Is expanded (separated) to the maximum state (see FIG. 5A), and the movable body 2b is pushed by the lock operation element 2a, so that the holding arms 2c ₁ and 2c ₁ are reduced to the minimum state (proximity). Therefore, the spheres 4 and 4 are pushed and guided (see FIG. 5B).
[0017]
The locking means 2 includes the elastic members 3 and 3 that urge the holding arms 2c ₁ and 2c ₁ in the direction of expanding the diameter, and the pair of holding arms against the urging force of the elastic members 3 and 3. 2c ₁ , 2c ₁ and spheres 4 and 4 for reducing the diameter.
[0018]
The elastic members 3 and 3 are made of appropriate materials such as a coil spring, a leaf spring, and a U-shaped spring, and are interposed between the free ends 2c ₃ and 2c _{3 of the} opposing holding arms 2c ₁ and 2c ₁ , The holding arms 2c ₁ and 2c ₁ are urged to expand the diameter to the maximum along the inner peripheral surface of the mounting recess 1b.
[0019]
As shown in FIG. 6, the bolt stopper A according to the present invention configured as described above is configured such that the outer ring body 1 is fitted on the bolt B and the lock operation element 2 a is simply rotated to rotate the holding ring 2 c. Both the holding arms 2c ₁ and 2c ₁ are reduced in diameter so that the outer periphery of the bolt B can be held in a non-rotatable state.
[0020]
Therefore, a fastening runner (not shown) is fitted to the nut 5 that passes through the opposite side of the steel material C and is screwed to the front end side of the bolt B, and then the fastening runner is attached to a dedicated wrench (not shown). ) Is inserted into a drive socket portion (not shown) and a control switch (not shown) of the wrench is pushed in, so that the nut 5 rotates together with the rotational drive of the fastening runner. Since the fastening runner is rotationally driven in a state in which it is held between the holding arms 2c ₁ and 2c ₁ and the reaction force lever 1a is locked to the adjacent bolt B, the rotation of the bolt B is ensured. The bolt B can be easily and smoothly tightened by anyone. Needless to say, in order to prevent an unnecessarily fastening operation, when an excessive force is applied to the drive socket of the wrench, the wrench is idling.
[0021]
The bolt stopper A according to the present invention is not limited to this embodiment, and can be freely modified within the scope of the object of the present invention, and the present invention encompasses all of them. is there.
[0022]
For example, in this embodiment, a round bolt is used as the bolt B. However, the present invention is not limited to this, and can also be used for a square bolt. Needless to say, it can be used to lock the nut.
[0023]
【The invention's effect】
The present invention is constructed as described above, the outer body is attached to the bolt or nuts, comprising a lock means for holding the bolt or nuts assembled to該Gaiso body unrotatable condition volts The locking means includes a lock operation element that is mounted on the exterior body so as to be movable back and forth, a movable body that is displaced according to a rotation operation of the lock operation element, and a displacement operation that is performed according to the displacement operation of the movable body. A holding ring that is displaced in a radially expandable manner, and a reaction arm that protrudes from the outer body and is locked by an adjacent bolt or nut, whereby the outer body is bolted or By simply fitting on the nuts and rotating the lock operation element, the holding ring can be easily reduced in diameter so that the outer periphery of the bolt or nut can be held in an unrotatable state. Is shall.
[0024]
The sandwiching ring is biased in a direction in which the sandwiching arm is expanded in diameter, and a pair of sandwiching arms assembled to form a lock hole at the center of the mounting recess formed in the exterior body. An elastic member to be squeezed and a spherical body to reduce the diameter of the pair of holding arms against the urging force of the elastic member, thereby fitting the exterior body on a bolt or nut to With a simple operation that only turns, the sphere is pressed and displaced by the movable body, and the bolt can be firmly held by a pair of holding arms, so even if it is rotated by a fastening runner, it can rotate with the nuts. This is advantageous in that the tightening operation can be performed smoothly and efficiently.
[0025]
In this way, the bolt stopper according to the present invention can easily tighten and tighten the bolts and nuts without co-rotating from the start of the tightening operation, so that the efficiency of a series of tightening operations can be improved, Since the configuration is simple, it is suitable for mass production and can be provided to consumers as a low price, so that the present invention has a great practical value.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an outer side of a bolt stopper according to the present invention.
FIG. 2 is a perspective view showing the inside of the bolt stopper.
FIG. 3 is an exploded perspective view of the bolt stopper.
4 (a) is a perspective view showing the main part surface of the locking means used in this embodiment, and FIG. 4 (b) is a perspective view showing the main part back surface of the locking means.
FIG. 5A is an explanatory view showing a state in which the bolt stopper is fitted into the bolt, and FIG. 5B is an explanatory view showing a state in which the bolt is locked.
FIG. 6A is a longitudinal sectional view showing a usage state of the bolt stopper, and FIG. 6B is a front view showing a usage state of the bolt stopper.
[Explanation of symbols]
A Bolt stopper B Bolt C Steel plate 1 Exterior body 1a Reaction arm 1b Mounting recess 1c Spiral hole 1d Lock hole 2 Locking means 2a Locking operator 2a ₁ Head 2a ₂ Screw part 2b Movable body 2c Nipping ring 2c ₁ Nipping arm 2c ₂ slope groove 2c ₃ free end 2c ₄ non-slip groove 2d retaining ring 3 elastic member 4 sphere 5 nut

Claims (2)

A bolt stopper comprising: an exterior body attached to a bolt or nut; and a lock means assembled to the exterior body to hold the bolt or nut in a non-rotatable state ,
The lock means includes a lock operation element that is mounted on the exterior body so as to be movable back and forth, a movable body that is displaced according to a rotation operation of the lock operation element, and a radial expansion and contraction that is performed according to a displacement operation of the movable body. A freely displaceable sandwiching ring, and a reaction force arm projecting from the exterior body and locked to adjacent bolts or nuts
Bolt stopper characterized by comprising. The holding ring includes a pair of holding arms that are assembled to form a lock hole at the center of a mounting recess formed in the exterior body, and an elastic force that biases the holding arm in a direction of expanding the diameter. A member, and a sphere that reduces the diameter of the pair of holding arms against the urging force of the elastic member.
The bolt stopper according to claim 1.

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