JP2913251B2 - spanner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary operation member for rotating a member to be rotated having an engagement portion provided with a plurality of pairs of engagement surfaces at positions spaced apart by 180 degrees in the circumferential direction. It is about spanners.

[0002]

2. Description of the Related Art In a substantially U-shaped opening wrench having a pair of fixed jaws opposed to each other, an obstacle is often present on the rotation trajectory of the spanner when the rotating member to be rotated is operated by the spanner. Therefore, in many cases, the amount of angular displacement of the member to be rotated by one operation must be reduced.
Therefore, Japanese Patent Application Laid-Open Nos. 60-80569 and
As disclosed in Japanese Patent Application Laid-Open No. 2-1077982, a wrench having a ratchet mechanism is realized, and in such wrench, only a rotational operation force in one direction is transmitted to a rotationally operated member. A small amount of angular displacement operation per wrench is required.

[0003]

However, in the prior art described above, when the wrench is engaged with the engaging portion of the member to be rotated in an opposite posture, the desired direction is obtained by the reciprocating rotation of the wrench. In this case, it is necessary to check the engagement posture of the wrench in the rotation operation because a rotation operation force directed in the opposite direction is applied to the rotation target member.

The present invention has been made in view of the above circumstances, and is capable of applying a rotational operation force to a rotationally operated member in any direction, and reciprocating a relatively narrow rotation range. An object of the present invention is to provide a spanner that can rotate a rotated operation member in a desired direction by an operation.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has an engaging portion provided with a plurality of pairs of engaging surfaces at positions spaced apart by 180 degrees in a circumferential direction. In a wrench for rotating a member to be rotated, a fixed jaw opposed to one of a pair of engaging surfaces and a rear portion of a fixed jaw opposed to the engaging portion are provided at a front end of a handle gripped by an operator. A front end wall is provided between the holding position for holding the engaging portion with the fixed jaw by contacting the other of the pair of engaging surfaces and a holding release position for releasing the holding state. A movable jaw is mounted so as to enable rotation of the movable jaw, and a slide member capable of contacting an engaging portion inserted between the fixed jaw and the movable jaw projects at least a front end portion forward from the front end wall by a predetermined distance. Retraction retracted almost in position and front end wall A spring is provided between the slide member and the handle so as to allow the slide member to move toward the forward position, and a spring is provided between the slide member and the handle. When the movable jaw is in the position, the movable jaw can be rotated to the clamping position in accordance with the movement of the slide member to the retracted position from the state where the movable jaw is in the clamping release position, and the cam is engaged.

[0006]

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show one embodiment of the present invention. FIG. 1 is a perspective view of a front end of a spanner, and FIG. 2 is a front view of the front end of the spanner in a state where a clamping state of an engaging portion is released. FIG. 3 is a longitudinal sectional view, and FIG. 3 is a sectional view corresponding to FIG. 2 in a state where the engaging portion is sandwiched.

A pair of engaging surfaces 2a and 2 are provided on the rotatable operating member 1 such as bolts at positions spaced apart by 180 degrees in the circumferential direction.
b is provided with an engaging portion 2 formed in, for example, a hexagonal shape, and the spanner 3 according to the present invention is engaged with the engaging portion 2 to rotate the operating member to be rotated. 1
Is configured to rotate.

The spanner 3 includes a handle 4 held by an operator.
And engagement surfaces 2a and 2b provided on the engagement portion 2 in pairs.
A pair of a fixed jaw 5 fixed to the front end of the handle 4 so as to face the one side 2a and a front end wall 6 provided on the handle 4 so as to be connected to the rear part of the fixed jaw 5 so as to face the engaging portion 2 A movable jaw 7 attached to the front end of the handle 4 so as to abut on the other of the engagement surfaces 2a and 2b to sandwich the engagement portion 2 with the fixed jaw 5; A slide member (8) movably disposed and cam-engaged with the movable jaw (7), and a spring (9) exerting a spring force for urging the slide member (8) forward.

The front end wall 6 is engaged so that the engaging surface 2a faces the fixed jaw 5 and the engaging portion 2 faces the engaging portion 2 when the engaging portion 2 is inserted between the fixed jaw 5 and the movable jaw 7. The handle 4 includes a pair of inclined surfaces that are inclined so as to move away from each other toward the joint portion 2 side.
, A large-diameter sliding hole 11 continuing to the rear end of the sliding groove 10, and a bottomed small-diameter communicating coaxially with the large-diameter sliding hole 11 through the step portion 12. A sliding hole 13 is provided. At the front end of the handle 4, on the side opposite to the fixed jaw 5, a storage groove 14 is provided which is open to the front and side and is continuous with the slide groove 10.

The slide member 8 is slidably fitted in the slide groove 10 so as to be slidable back and forth.
A regulating recess 15 extending in the front-rear direction is provided. On the other hand, a stopper pin 16 disposed in the regulating recess 15 is fixed to the handle 4, and the stopper pin 16 contacts the front and rear ends of the regulating recess 15 so that the slide member 8 is moved.
The forward and reverse positions of the vehicle are regulated. That is, the slide member 8 has a forward position (position shown in FIG. 2) in which at least the front end protrudes forward by a predetermined distance from the front end wall 6, and a retracted position (position shown in FIG. 3) which is substantially stored in the front end wall 6. It is possible to move back and forth between them.

A small-diameter sliding hole 1 is provided at the rear end of the sliding member 8.
3, a front end of a plunger 18 slidably fitted in the large-diameter sliding hole 11 is abutted, and the plunger 18 and the stepped portion are integrally formed. 12, the spring 9 is contracted. Therefore, the plunger 18
Is urged forward by the spring 9 and is pushed by the plunger 18, whereby the slide member 8 is spring-urged toward the forward position.

At the rear part of the movable jaw 7, a support portion 7a housed in the storage groove 14 is provided integrally with a reduced width, and the support portion 7a is provided so as to cross the storage groove 14. It is rotatably supported by a support shaft 19 fixed to the handle 4. Thus, the movable jaw 7 has an engagement portion 2 whose engagement surface 2
a is inserted between the fixed jaw 5 and the movable jaw 7 so as to face the fixed jaw 5, the engagement surface 2 paired with the engagement surface 2 a
b between the clamping position (FIG. 3) where the engaging portion 2 is clamped between the fixed jaw 5 and the engaging portion 2 and the clamping release position (the position shown in FIG. 2) where the clamping state is released. The handle 4 is supported as being movable.

A cam 20 is provided at the front end of the slide member 8 so as to project toward the support 7a of the movable jaw 7. The cam 20 and the support 7a of the movable jaw 7
Is in the forward position, the movable jaw 7 is set to the clamping release position, and the movable jaw 7 is engaged so as to rotate to the clamping position as the slide member 8 moves from the forward position to the retracted position.

Next, the operation of this embodiment will be described. When the engaging portion 2 is inserted between the fixed jaw 5 and the movable jaw 7 during the rotation operation of the engaging portion 2, the engaging portion 2 is in the forward position by the spring force of the spring 9. Until the engagement portion 2 comes into contact with the sliding member 8, the movable jaw 7 is at the clamping release position as shown in FIG. 2.

Next, when the handle 4 is pressed toward the engagement portion 2, the slide member 8 is pushed by the engagement portion 2 to move from the forward position to the retracted position, and the movable jaw 7 is accordingly moved to the fixed jaw 5. In cooperation with, the engaging portion 2 is clamped as shown in FIG. Therefore, by rotating the handle 4 in one direction, it is possible to rotate the operated member 1 in the direction of loosening or in the direction of tightening.

When returning the handle 4 in the opposite direction without applying a rotational operation force to the member to be rotated 1 after rotating the handle 4 by a predetermined angle, the handle 4 is pressed against the engaging portion 2. Relax the power. Then spring 9
Due to the spring force, the slide member 8 returns to the forward position, and the movable jaw 7 rotates to the holding release position, so that the holding state of the engaging portion 2 is released. In this state, even if the engaging portion 2 is located between the fixed jaw 5 and the movable jaw 7, that is, even if the handle 4 is returned in the reverse direction without pulling out the spanner 3, the rotational operation force acts on the rotationally operated member 1. Never.

Then, by rotating the handle 4 pressed toward the engaging portion 2 again in one direction, the rotated member 1 can be rotated.

In this manner, the to-be-rotated member 1 can be rotated in one direction by the reciprocating rotation of the handle 4 in a relatively narrow rotation range. Moreover, it is possible to apply a rotational operation force to the rotationally operated member 1 in any direction, and it is not necessary to pay attention to the engagement posture of the spanner 3 with the engagement portion 2.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the appended claims. It is possible to do.

For example, a spring may be provided around the support 19 to bias the movable jaw 7 in the opening direction.

[0022]

As described above, according to the present invention, the fixed jaw facing one of the pair of engaging surfaces and the fixed jaw facing the engaging portion are provided at the front end of the handle gripped by the operator. And a front end wall connected to the rear portion, a holding position for abutting against the other of the pair of engaging surfaces to hold the engaging portion between the fixed jaw and a holding release position for releasing the holding state. A movable jaw is mounted so as to be rotatable between the fixed jaw and a movable jaw, and a slide member capable of contacting an engaging portion inserted between the fixed jaw and the movable jaw projects at least a front end portion forward by a predetermined distance from the front end wall. A spring is provided between the slide member and the handle so as to be able to move back and forth between the retracted position and the retracted position substantially accommodated in the front end wall. And
The slide member and the movable jaw enable the movable jaw to be rotated to the clamp position in accordance with the movement of the slide member to the retracted position from the state in which the movable jaw is in the release position when the slide member is in the forward position. Because the cam is engaged
The state of holding the engaging portion and the state of releasing the holding state are switched by the action and release of the pressing force toward the engaging portion of the handle. It is possible to rotate the rotary operation member in one direction, and it is also possible to apply a rotational operation force to the rotated operation member in any direction, and it is necessary to pay attention to the engagement posture of the wrench to the engagement portion. Absent.

[Brief description of the drawings]

FIG. 1 is a perspective view of a front end of a spanner.

FIG. 2 is a longitudinal sectional view of a front end portion of a spanner in a state where a holding state of an engagement portion is released.

FIG. 3 is a cross-sectional view corresponding to FIG. 2 in a state where an engagement portion is sandwiched.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotated operating member 2 Engagement part 2a, 2b Engagement surface 3 Spanner 4 Handle 5 Fixed jaw 6 Front end wall 7 Movable jaw 8 Slide member 9 Spring

Claims (1)

(57) [Claims] 1. A rotating operation member (1) having an engaging portion (2) provided with a plurality of sets of engaging surfaces (2a, 2b) forming a pair at positions spaced apart by 180 degrees in a circumferential direction. In a wrench for rotating operation, a fixed jaw (5) facing one of a pair of engagement surfaces (2a, 2b) is provided at a front end of a handle (4) gripped by an operator, and an engagement portion (2). ), A front end wall (6) connected to the rear part of the fixed jaw (5) is provided, and the engaging portion (2) is brought into contact with the other of the pair of engaging surfaces (2a, 2b). A movable jaw (7) is attached so as to be rotatable between a clamping position for clamping with the fixed jaw (5) and a clamping release position for releasing the clamping state, and the fixed jaw (5) and the movable jaw ( 7) A slide member (8) that can be brought into contact with the engaging portion (2) inserted between the front end wall (6) and at least. The front end is also provided on the handle (4) so as to be able to move back and forth between a forward position protruding a predetermined distance forward and a retracted position substantially accommodated in the front end wall (6). A spring (9) for urging the slide member (8) toward the forward position is provided between the handles (4). The slide member (8) and the movable jaw (7) are moved forward by the slide member (8). When the movable jaw (7) is in the holding position, the movable jaw (7) can be rotated to the holding position in accordance with the movement of the slide member (8) to the retracted position from the state in which the movable jaw (7) is in the holding release position. A spanner characterized by being combined.