JPH05138545A - Tightening tool - Google Patents

Abstract

PURPOSE:To simplify the constitution of a tightening tool to tighten a nut of a through bolt, reduce the setting time during the tightening work, and facilitate the handling work. CONSTITUTION:A tightening tool is provided with a tightening socket 11 which is provided with a protruded part 11a of gear shape to the outer circumference and is engaged to the inner circumference with a nut coupled with the through bolt in a threaded manner, a locking socket 12 provided with a protruded part 12b of gear shape on the outer circumference of an engaginlgy locking hole 12a to engagingly lock the tip of the bolt at the center, a pushingly pressing means 20 to give a rotational force to the tightening socket 11 through the protruded 11a of the tightening socket 11, and a reaction force receiving means to receive the reaction force of the rotational force by bringing into contact with the protruded part 12b of the locking socket 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tightening tool used for tightening nuts of, for example, double screw bolts, and more particularly to a reaction force receiving during tightening.

[0002]

2. Description of the Related Art FIG. 3 is a plan view showing the structure of a conventional tightening tool of this kind when tightening a nut on a through bolt, and FIG. 4 is a side view of FIG. In the figure, 1 is a tightening socket, 2 is a holding arm for holding the tightening socket 1, 3 is a pressing means for applying a rotational force to the tightening socket 1, 4 is a nut to be tightened, and 5 is a specially shaped tip 5a. A through bolt with which the nut 4 is screwed, 6 is a reaction force receiving arm having a locking hole 6a that fits into the tip 5a of the bolt 5, 7 and 8 are nuts with which adjacent through bolts are screwed, 9, Reference numeral 10 designates a rotation-stopping socket and a reaction force receiving socket provided around the nuts 7 and 8, respectively.

Next, the operation will be described. The tightening nut 1 is fitted to the tightening nut 4, and the holding arm 2 is attached to the rotation preventing socket 9. Next, the locking hole 6a of the reaction force receiving arm 6 is fitted into the tip 5a of the bolt 5, and the other is inserted in the reaction force receiving socket 10. By actuating the pressing means 3 and moving it to the position indicated by the solid line, a rotational force in the tightening direction is applied to the nut 4 via the tightening socket 1. At this time, the bolt 5 is stopped by the reaction force receiving arm.

[0004]

Since the conventional tightening tool is constructed as described above, it is necessary to support the rotational reaction force acting on the bolt by using another arm and another bolt or frame. There is a problem that separate parts are required and it takes time to set.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to obtain a tightening tool which can be easily handled by integrating the parts of the tightening tool to shorten the set time at the time of tightening. With the goal.

[0006]

A tightening tool according to the present invention comprises a tightening socket having a gear-shaped projection on the outer periphery and having an inner circumference fitted with a nut screwed into a through bolt, and a central through hole. Anti-rotation socket having locking holes for engaging with the tip of the bolt, each having a gear-shaped projection on the outer circumference, a pressing means for applying a rotational force to the tightening socket via the projection of the tightening socket, and a non-rotating socket And a reaction force receiving means for receiving a reaction force of the rotational force by abutting on the protrusion.

[0007]

In the tightening tool according to the present invention, the reaction force receiving means is integrally provided, so that the rotation stopping mechanism using the bolt end is built in and the setting at the time of tightening is simplified.

[0008]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. 1 is a plan view showing a tightening tool according to Embodiment 1 of the present invention, and FIG. 2 is a side view of FIG. In the figure, 4 is a nut to be tightened, and 5 is a specially shaped tip 5.
It is a through bolt having a and to which the nut 4 is screwed and tightened. Reference numeral 11 denotes a tightening socket having a gear-shaped protrusion 11a on the outer periphery and an inner periphery fitted with the nut 4, 12 is a detent socket having a locking hole 12a at the center and a gear-shaped protrusion 12b on the outer periphery, respectively. 13 is an outer plate for rotatably holding the tightening socket 11 and the rotation-stopping socket 12, and 14
Is a hydraulic ram that generates a tightening force, 15 is a clevis that transmits the force of the hydraulic ram 14, 16 is an arm that transmits the force of the hydraulic ram 14 in the rotation direction of the nut 4, and 17 is the clevis 15 and the arm 1.
6 is a pin for connecting 6; 18 is a claw for transmitting the rotational force of the arm 16 to the tightening socket 11 through the protrusion 11a; 19 is a pin for connecting the claw 18; The pressing means 20 for applying is formed. Reference numeral 21 is a rotation preventing pawl that abuts the protrusion 12b of the rotation preventing socket 12 and receives a tightening reaction force, and 22 is a rotation preventing pawl 21.
Is a pin for supporting the outer plate 13 on the outer plate 13, and 23 is a spring for pressing the detent claw 21 against the projection 12b. The reaction force receiving means 24 is formed by these 21 to 23.

Next, the operation will be described. When screwing nut 4 onto bolt 5 and tightening, tightening socket 1 of tightening tool
1 is fitted to the nut 4, and then the locking hole of the rotation-stopping socket 12 is also fitted to the tip 5a of the bolt 5 to set the tightening tool. When the nut 4 is tightened, the hydraulic ram 14 extends so that the nut 4 is transmitted and transmitted through the arm 16 and the pawl 18 and is tightened. At this time, the tightening tool also generates a reaction force when the nut 4 rotates, and tries to rotate in the reverse rotation direction of the nut 4, but the detent claw 21 attached to the tightening tool outer plate 13 is locked by the tip 5a of the bolt 5. The tightening tool does not rotate and only the nut 4 is tightened because it abuts the protruding portion 12b of the detent socket 12 and supports the rotational force.

Embodiment 2. In the first embodiment, the pressing means 2
Although the hydraulic ram type is shown in FIG. 0, it is possible to use an air cylinder, a rotary cylinder type, an electric type or the like, and the same effect as that of the first embodiment can be obtained.

Embodiment 3. Further, although the rotation stopper socket 24 has a gear shape, it may have a notch shape,
Further, even if the anti-rotation claws 21 are received at several places at the same time, the same effect is obtained.

[0012]

As described above, according to the present invention, the tightening socket having the gear-shaped projection on the outer periphery and the inner periphery fitted with the nut screwed with the through bolt, and the through bolt tip at the center. A rotation stopper socket each having locking holes for locking and having a gear-shaped protrusion on the outer periphery, a pressing means for applying a rotational force to the tightening socket via the protrusion of the tightening socket, and a protrusion of the rotation stopper socket Since it is configured with reaction force receiving means that receives reaction force of rotational force by abutting against, it has a built-in detent mechanism that uses the bolt end to shorten the set time at the time of tightening and easy to handle. There is an effect that the attached tool can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view showing a tightening tool according to a first embodiment of the present invention.

FIG. 2 is a side view showing the tightening tool according to the first embodiment of the present invention.

FIG. 3 is a plan view showing a configuration of a conventional tightening tool.

FIG. 4 is a side view showing a configuration of a conventional tightening tool.

[Explanation of symbols]

 4 Nuts 5 Through Bolts 11 Tightening Sockets 11a Protrusions 12 Anti-rotation Sockets 12b Protrusions 13 Outer Plates 20 Pressing Means 24 Reaction Force Receiving Means

Claims (1)

[Claims] 1. A tightening socket having a gear-shaped projection on the outer periphery, the inner periphery of which is fitted with a nut screwed into a through bolt,
A detent socket that has a locking hole for locking the through bolt tip in the center and has a gear-shaped protrusion on the outer circumference,
Pressing means for applying a rotational force to the tightening socket via the protruding portion of the tightening socket, and reaction force receiving means for receiving a reaction force of the rotating force by contacting the protruding portion of the anti-rotation socket. A tightening tool equipped with.