JPS599818Y2 - Stud bolt tightening socket - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a socket used for fastening a so-called stud bolt having male threads cut into both ends.

The conventional socket for tightening stud bolts has a female thread carved into one end that engages with the male thread of the stud bolt, and the other end is non-rotatably fitted with the output shaft of a pneumatic tightening tool such as a nut runner. However, when tightening is completed, the end of the stud bolt is strongly crimped to the inner part of the female thread, and the stud bolt becomes wedged and cannot be removed from the socket. Not only does this often occur, but also the stud bolt must be screwed into the socket prior to tightening, making the operation laborious.

The present invention solves the above-mentioned drawbacks by making the tightening operation easier and preventing the stud bolt and socket from being bitten.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the socket of the present invention will be described with reference to the accompanying drawings showing embodiments thereof.

As shown in Fig. 1, the socket of the present invention consists of a socket joint 2 having a shaft hole 5 that is slidably fitted to the output shaft 1 of a pneumatic tool such as a nut runner that can be rotated in forward and reverse directions.
and a socket main body 3 having a female thread 6 carved into its tip portion to be screwed into the male thread 4' of the stud bolt 4.

A hole 7 having the same central axis as the shaft hole 5 is bored at the end opposite to the socket joint 2, and at least one locking pawl 8 is provided protruding from the opening edge of the hole 7.

Further, a cylindrical portion 10 having the same central axis as the hole 9 in which the female thread 6 is formed at the end opposite to the female thread 6 of the socket body 3 and having the same outer diameter as the inner diameter of the hole 7 is provided. At the same time, a locking pawl 11 is provided on the end portion to protrude along the outer surface of the cylindrical portion 10 in correspondence with the locking pawl 8, and a female thread 12 is further carved on the inner surface of the cylindrical portion 10. At the same time, a through hole 15 is bored in the partition wall 13 that partitions the cylindrical portion 10 and the hole 9 to communicate the cylindrical portion 10 and the hole 9, and to hold the thrust ball 14 so that it can escape only on the cylindrical portion 10 side. Furthermore, a magnet 21 is integrally provided at the open end of the hole 9.

16 is a bolt that is screwed into the female thread 12 of the cylindrical portion 10 and holds the thrust ball 14 in the through hole 15 so that it cannot escape; 17 is the head of the bolt 16; A small hole 17' is bored, and a small hole 18' is also formed in the outer wall of the hole 7 of the socket joint 2 to communicate with the small hole 17', and a bolt 16 is inserted into the hole 7. By inserting a stop pin 18 into both small holes 17' and 18', the bolt head 17 is connected to the socket joint 2 so that it cannot rotate or slide.

19 is an O-ring or ring pin that is fitted to the outer periphery of the socket joint 2 to prevent the stop pin 18 from falling off; 20 is a stop pin that connects the output shaft 1 and the socket joint 2 so that they cannot fall off; 22 is a socket A guide cylinder rotatably and slidably fitted to the end of the hole 9 of the main body 3 on the drilling side, 23 a spring that urges the guide cylinder 22 in a direction away from the socket main body 3, and 24 a socket main body. A thrust bearing 25 is fixed to the socket body 3 and prevents the rotation of the guide cylinder 22 from being transmitted to the guide cylinder 22.
This is a sheath cylinder that limits movement by the spring 23 of No. 2.

The operation of the socket constructed as described above is as follows.

A small hole 17' formed in the head 17 of the bolt 16 communicates with a small hole 18' formed in the outer wall of the hole 7 of the socket joint 2 into which the bolt head 17 is inserted, and a stop pin 18 is inserted into both small holes. By inserting the pneumatic fastening tool into the shaft hole 5, the socket body 3 is connected to the socket joint 2 so as to be rotatable only within a predetermined angle range (an angle determined by the interval between adjacent locking claws). By fitting the output shaft 1, the stud bolt 4 can be tightened.

In this state, one male thread 4 of the stud bolt 4
′ through the opening 22 ′ of the guide tube 22 and into the opening of the hole 9 of the socket body 3 , the stud bolt 4 is moved to the magnet 21 .
It is held in such a way that it cannot fall off.

When the other male screw 4' of the stud bolt 4 held by the magnet 21 is brought into contact with the open end of the female screw hole 27 drilled in the mounting base material 26 and the pneumatic fastening tool is driven, the locking pawl 8
engages with the corresponding locking pawl 11 and transmits rotational force to the socket body 3.
, 4' are screwed into the female thread 6 and the female thread hole 27, respectively.

After the male screw 4' is screwed into the female screw hole 27 and the guide tube 22 is brought into contact with the mounting base material 26, the guide tube 22 is slid against the spring 23, and the stud bolt 4 is firmly tightened. can.

Next, if you drive the pneumatic fastening tool to rotate in the opposite direction,
The locking claw 8 is separated from the engaged locking claw 11,
Until the locking claw 8 engages with the locking claw 11 next to the locking claw 11, the rotational force is not transmitted to the socket body 3, and the locking claws 8, 1
1 is engaged, the male screw 4' of the stud bolt 4 can be extracted from the female screw 6 of the socket body 3 by transmitting rotational force to the socket body 3.

The locking pawl 8 is separated from the locking pawl 11 of the other locking pawl 11.
Since the female thread 6 and the male thread 4' are firmly screwed together until the socket body 3 is engaged with the bolt 1, the socket body 3 does not rotate.
6 rotates integrally with the socket joint 2, the bolt 16 moves in the direction of escape from the cylindrical portion 10, and the pressing force of the thrust ball 14 is eliminated, so that the thrust ball 14 cannot be separated from the stud bolt 4. There is only frictional resistance between the socket body 3 and the stud bolt 4 due to the male thread 4' and the female thread 6, and the biting state is completely eliminated, so the rotational force is transmitted to the socket body 3. At this time, the stud bolt 4 can be reliably pulled out from the socket body 3.

Although the example in which the magnet 21 is provided at the open end of the hole 9 of the socket body 3 has been described above, any holding material that can hold the stud bolt 4 so that it does not easily fall out, such as a pusher, can be used. Of course, the holding material may be provided at the opening of the guide tube 22 instead of the open end of the hole 9, or may be provided at the open end of the hole 9 and the opening of the guide tube 22. be.

FIG. 4 shows an embodiment in which the implantation depth of the long stud bolt 4 is kept constant. In the embodiment shown in FIG.
is provided so as to be constantly urged outward by a spring 30, and furthermore, a recess 32 to be engaged with the ball 29 is bored at a predetermined position on the inner wall surface of the collar 31 that is fitted into the guide tube 22. be.

In FIG. 4, the same parts as in FIG. 1 are indicated by the same reference numerals.

Therefore, the tip of the collar 31 comes into contact with the mounting base material 26,
Further, when the guide tube 22 is pushed against the spring 23 and comes into contact with the thrust bearing 24, further tightening is reliably prevented.

Also, if the length of the stud bolt changes or the depth of the stud bolt is changed, by pulling the collar 31 in the axial direction, the ball 29 will move into the hole 28 against the force of the spring 30. Since it is pushed in, it can be easily pulled out,
Color 3 according to stud bolt length or implantation depth
1 into the socket body 3, the collar 31 can be replaced.

The socket of the present invention as described above has practical advantages in that it is possible to support the stud bolt in the socket by the simple operation of insertion without any screwing, and it can significantly simplify the tightening operation of the stud bolt. be effective.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is an exploded perspective view of the socket of the present invention, Fig. 2 is a central vertical sectional view showing the state before the tightening operation starts, and Fig. 3 is the state after the tightening is completed. FIG. 4 is a central vertical cross-sectional view showing another embodiment; FIG. 1... Output shaft, 2... Socket joint, 3...
・Socket body, 4... Stud bolt, 6... Female thread, 9... Hole, 21... Magnet, 22... Guide tube, 22'... Opening, 23... Spring, 24 ... Thrust bearing, 25... Scabbard tube.

Claims (1)

[Scope of utility model registration request] A socket body 3 with a bolt 16 screwed therein is integrally fitted into the tip of the socket joint 2, into which the output shaft 1 of a pneumatic fastening tool is fitted non-rotatably to the rear end, so as to be rotatable in forward and reverse directions. ,
The head 17 of the Makoto bolt 16 is connected to the socket joint 2 in a non-slidable and non-rotatable manner, and on the outer periphery of the tip of the socket body 3,
A guide tube 22 that can slide within a predetermined length range and is biased toward the tip is fitted and fixed, and the tip of the socket body 3 is provided with a female thread that engages with the male thread at the rear end of the stud bolt. An opening 22' through which a stud bolt can be inserted is bored at the tip of the guide cylinder, and at least one of the open end of the hole 9 and the opening 22' is provided with a hole 9.
A socket for tightening a stud bolt, which is provided with a retainer that prevents and holds the stud bolt inserted through the end of the plate from falling off.