JPH0631643A - Rotation assist tool attached to tightening machine for use - Google Patents

Abstract

PURPOSE:To provide miniaturization and to improve operability by constituting a tool of an outer case fitted to an outer socket by comprising a polygonal shaft part and a point end opening tube part and an assist socket arranged in the outer socket to be fitted to an inner socket by comprising a nut engaging socket tube and a shaft unit, in a rotation assist tool for a shear bolt tightening machine. CONSTITUTION:An assist tool is constituted of an outer case 5 fitted to an outer socket 3 and an assist socket 6 fitted to an inner socket 2, of a tightening machine 1. The outer case 5 is constituted of a polygonal shaft part 51 and a tube part 52 having a diameter larger than the shaft part to open the point end. An outward facing reaction force receiver 7 is protrusively provided in the tube part 52. The assist socket 6 is constituted of a socket tube 61 engaged with a nut 93, shaft unit 62 and a polygonal shaft part 63 and supported coaxially by a bearing metal 8 in the outer socket 5. The shaft unit 62 is inserted through the polygonal shaft part 51 of the outer socket 5, and the polygonal shaft part 63 is protrusively provided so as to engage with the inner socket 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary tool which is attached to the tip of a tightening machine for tightening shear bolts and is mainly used for loosening bolts.

[0002]

2. Description of the Related Art As shown in FIG. 5, a shear bolt (9) has been conventionally used to connect a steel frame (94). The shear bolt (9) has a shearing tip (91) at its tip and can be tightened by a dedicated tightening machine (1).

The tightening machine (1) is a tip of shear bolt (9).
An inner socket (2) that engages with (91) and an outer socket (3) that engages with a nut (93) screwed into the shear bolt (9) are concentrically provided at the tip of the case (11), Both sockets are connected to the two output shafts of the planetary gear speed reduction mechanism (12) whose rotation directions are opposite to each other.

The tightening machine (1) comprises a motor (13) for driving the planetary gear reduction mechanism (12) and a handle (14), and the handle (14)
ON (-) of the motor (13) by operating the trigger (15)
Performs OFF control.

Inner socket (2) and outer socket
Since tightening forces in opposite directions act on (3), the shear bolt (9) applies a constant torque to the tip from the groove (92) to the tip.
(91) is sheared, and the tightening state and tightening torque of the bolt can be determined by the presence or absence of the tip (91) of the shear bolt (9).

[0006]

When it becomes necessary to loosen the shear bolt (9) which has been tightened, the conventional tightening machine cannot be used. Even if the motor (13) of the tightening machine (1) is reversely rotated and the nut engaged with the outer socket (3) is rotationally driven in the loosening direction, the outer socket (3)
This is because the tightening reaction force of (1) is absorbed by the inner socket (2) idling through the planetary gear reduction mechanism (12), and the outer socket (3) itself does not rotate.

Therefore, in the past, the nut had to be loosened by using a spanner or the like, but the shear bolt (9) is large and tightened with a large torque for shearing the tip (91). A large handle has to be connected to a large wrench to rotate it, which requires a lot of labor, and it may be difficult to secure a working space for rotating the wrench. It was especially dangerous to work in high places because the hands could slip and the posture could be lost. In view of the above situation, the present invention clarifies an auxiliary tool that can loosen shear bolts using a conventional tightening machine, and solves the above problems.

[0008]

The auxiliary tool of the present invention is a tightening machine (1).
The outer case (5) that fits into the outer socket (3) and the auxiliary socket (6) that fits into the inner socket (2) of the tightening machine (1). socket
The polygonal shaft portion (51) fitted to (3) is formed by projecting a cylindrical portion (52) having a diameter larger than that of the polygonal shaft portion and having an open end.
A reaction force receiver (7) is provided on the outer surface of (2) so that the auxiliary socket (6) has a socket tube (61) that engages with the nut (93) and a tube portion (52) of the outer case (5). Is housed concentrically with the outer case (5), and the shaft body (62) is provided in the socket tube (61) so as to rotatably penetrate the shaft center of the polygonal shaft portion (51) of the outer case (5). A polygonal shaft portion (63) that engages with the inner socket (2) is formed at the tip of the shaft body so as to project therefrom.

[0009]

[Operation and effect] The polygonal shaft portion (51) of the outer case (5) is attached to the outer socket (3) of the tightening machine (1) and the inner socket.
The polygonal shaft portion (63) of the auxiliary socket (6) is engaged with (2).
Engage the auxiliary socket (6) with the nut (93) to be loosened.

The tightening machine (1) is driven. After rotating the outer socket (3) of the tightening machine (1) until the reaction force receiver (7) hits the bolt and nut near the bolt, the inner socket
(2) starts rotating.

Originally, the inner socket (2) originally engages with the tip (91) of the shear bolt (9) and exerts a rotational force in a direction opposite to the tightening direction of the nut. ) Auxiliary socket driven by
(6) rotates in the nut loosening direction. Therefore auxiliary socket
The nut (92) engaged with (6) is loosened.
As in the prior art, it is possible to free the labor and danger of connecting a handle to a spanner or the like and relying on human hands to loosen the nut. Tightening machine
If the auxiliary tool (4) is removed from (1), the tightening machine (1) can be used for the original shear bolt tightening.

Since the shear bolt (9) tightened by the tightening machine (1) is loosened by using the tightening machine (1), it cannot be loosened due to problems of working space and torque. Absent. The auxiliary tool (4) of the present invention is used in the tightening machine (1).
You can usually loosen the hexagon bolt. or,
If the motor (13) of the tightening machine (1) is rotated in the reverse direction, it can be used for normal bolt tightening.

[0013]

[Example] Auxiliary tool is the outer socket of the tightening machine (1)
The outer case (5) engages with (3) and the auxiliary socket (6) engages with the inner socket (2) of the tightening machine (1).

The outer case (5) has a polygonal shaft (51) engaging with the outer socket (3) and a cylindrical portion (52) having an open end protruding from the polygonal shaft (51). The cylindrical portion (52) has a diameter larger than that of the polygonal shaft portion (51) and smaller than the maximum outer diameter of the case (11) of the tightening machine (1). A plate-like reaction force receiver (7) is provided on the cylindrical portion (52) so as to project outward.

In the auxiliary socket (6), the socket tube (61) engaging with the nut (93) is connected to the tube portion (52) of the outer case (5) via the bearing metal (8) to form the outer case (5). The shaft body (62) is housed concentrically, and the shaft body (62) is provided so as to rotatably penetrate the shaft center of the polygonal shaft portion (51) of the outer case (5) in the socket tube (61). A polygonal shaft portion (63) that engages with the inner socket (2) is provided at the tip of the projection.

A polygonal engagement hole (64) for engaging with the nut (93) is formed on the inner surface of the socket tube (61). A circumferential groove (65) is formed at the penetrating edge of the shaft body (62), and a snap ring (6
6) is fitted to prevent the auxiliary socket (6) from coming off.

However, the outer socket of the tightening machine (1)
Set the auxiliary tool (4) by engaging the polygonal shaft (51) of the outer case (5) with (3) and the polygonal shaft (63) of the auxiliary socket (6) with the inner socket (2). To do. Engage the auxiliary socket (6) with the nut (93) to be loosened.

The tightening machine (1) is driven. After rotating the outer socket (3) of the tightening machine (1) until the reaction force receiver (7) hits the bolt and nut near the bolt, the inner socket
(2) starts rotating.

Originally, the inner socket (2) originally engages with the tip (91) of the shear bolt (9) and exerts a rotational force in a direction opposite to the tightening direction of the nut. ) Auxiliary socket driven by
(6) rotates in the nut loosening direction. Therefore auxiliary socket
The nut (92) engaged with (6) is loosened.
Incidentally, the auxiliary tool (4) of the present invention can be used to loosen the ordinary hexagon bolt by using the tightening machine (1). Further, if the motor (13) of the tightening machine (1) is rotated in the reverse direction, it can also be used for tightening large bolts. The present invention is not limited to the configuration of the above embodiment, and various modifications can be made within the scope of the claims.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a usage state.

FIG. 2 is a front view of an auxiliary tool.

FIG. 3 is a bottom view of the auxiliary tool.

FIG. 4 is a cross-sectional view of an auxiliary tool.

FIG. 5 is an explanatory diagram of a usage state of the shear bolt tightening machine.

[Explanation of symbols]

 (1) Tightening machine (2) Inner socket (3) Outer socket (4) Auxiliary tool (5) Outer case (6) Auxiliary socket (7) Reaction force receiver

Claims (1)

[Claims] 1. A tip (91) of a shear bolt (9) having an inner socket (2) and an outer socket (3) concentrically and a tip for shearing (91) at the tip, the inner socket.
(2) Engage the outer socket (3) with the nut (93) screwed into the shear bolt (9), and apply a tightening force to the inner socket (2) and the outer socket (3) in opposite directions. It is an auxiliary tool that is detachably connected to a tightening machine that shears the tip (91) and is used to fit the outer case (5) that fits the outer socket (3) and the inner socket (2). The outer case (5) has a cylindrical shaft portion (51) fitted to the outer socket (3) and having a diameter larger than that of the polygonal shaft portion and an open end.
(52) is formed by projecting, and the reaction force receiving (7) is projected outward on the cylindrical portion (52), and the auxiliary socket (6) is a socket cylinder (which engages with the nut (93) ( 6
1) is housed in the tubular portion (52) of the outer case (5) concentrically with the outer casing (5), and the polygonal shaft portion (5) of the outer casing (5) is housed in the socket barrel (61).
The shaft body (62) is pierced through the shaft center of
Polygonal shaft that engages the inner socket (2) at the tip of 2)
A rotation assist tool formed by projecting (63).