JPH11198053A - Wrench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an epoch making wrench that can repeatedly and quickly perform reciprocating operation of a grip section, smoothly perform ratchet drive, very smoothly perform fitting operation to the part to be fastened and removing operation. SOLUTION: This wrench comprises a lower jaw section 2 at the tip section of a gripping section 1, an upper jaw section 4 at the curved tip section of the tip turning section 3 of this gripping section 1, and a fastening section 5 held by the lower jaw section 2 and the upper jaw section 4 so that ratchet drive can be performed with the fastening section 5 kept held by the lower jaw section 2 and the upper jaw section 4 due to the reciprocating motion of the gripping section 1 in a specified direction. In this case, in the turning section 3, an energizing body to resist the turning motion to be opened in the outer direction and a lever section 7 to turn to open the turning section 3 in the outer direction resisting the energizing body are provided so that this lever section 7 is operated by a finger 8, and the turning section 3 is turned to be opened in the outer direction together with this lever section 7 by pressing the lever section 7 for disengaging a holding state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for holding and holding a tightening portion such as a nut or a bolt when the grip portion is returned to an initial position after the tightening portion is turned or loosened and turned. The present invention relates to a ratchet-driven wrench having a configuration in which a rotation driving force is not applied to a fastening portion, and which can fasten and rotate the fastening portion by reciprocating the grip portion in a predetermined direction, and can loosen and rotate the fastening portion. .

[0002]

2. Description of the Related Art The following ratchet-driven wrench is popular.

The prior art will be described with reference to the drawings showing an embodiment of the present invention. The rotating portion 3 is rotatable so as to protrude laterally at the tip of a rod-like gripping portion 1. The pivoting portion 3 is bent in a hook shape so that the tip portion is disposed at a position facing the lower jaw portion 2.
An upper jaw 4 is provided at the bent end portion of the gripping portion. The upper jaw 4 is formed in an inner surface shape capable of holding and locking a tightening portion 5 such as a nut or a bolt in a detented state. By a reciprocating operation in a predetermined direction, the lower jaw part 2 and the upper jaw part 4 are configured to be able to perform a ratchet drive while holding the tightening part 5.

Therefore, for example, when the nut is tightened and turned as the tightening portion 5, the turning portion 3 is first opened and turned outward to rotate the nut 5 between the lower jaw portion 2 and the upper jaw portion 4. The lower part 2 and the upper jaw part 4 hold the nut 5 in a detented state by closing and rotating the rotating part 3 inward.

When the grip portion 1 is pushed in a predetermined direction in this state, the pushing force is applied to the nut 5 as a rotational driving force, and the nut 5 held by the lower jaw portion 2 and the upper jaw portion 4 is moved. Is rotated by tightening.

On the other hand, when the grip portion 1 is moved in the opposite direction to return to the initial position, a force acts on the rotating portion 3 outwardly,
Therefore, the rotating portion 3 is opened and rotated outward.

The lower jaw 2 is moved by the retreating movement of the rotating part 3.
While the upper jaw 4 holds the nut 5, no rotational driving force is applied to the nut 5 by the return movement of the grip 1.

That is, in the case of a hexagonal nut, when the grip portion 1 returns after the tightening rotation, no rotation driving force is applied to the nut 5, and the lower jaw portion 2 and the upper jaw portion 4 are connected to each other by the nut. 5 is configured to move while changing the holding position while getting over the outer surface of the corner.

Therefore, by repeatedly performing the operation of reciprocating the grip portion 1 in a predetermined direction, the lower jaw portion 2 and the upper jaw portion 4 hold and hold the nut 5 in the movement in one direction. In the return movement in the opposite direction, the rotating portion 3 is freely opened and rotated outward, so that the lower jaw portion 2 and the upper jaw portion 4 are held together. Is changed, the rotation driving force is not applied to the nut 5 and the position of the grip portion 1 can be returned to the original position. The nut 5 can be moved only by reciprocating the grip portion 1 while holding the nut 5. This is a configuration in which a ratchet drive capable of tightening and rotating can be performed.

[0010] Therefore, in this conventional example, it is possible to provide a wrench capable of realizing a ratchet drive without requiring a complicated configuration or processing.

[0011]

However, in such a ratchet-driven wrench, the rotating portion provided with the upper jaw is freely openable and rotatable outward, and is biased by a spring. It is in a so-called wobble state without being performed.

For this reason, depending on the working angle, the rotating portion may open and rotate outward due to its own weight, and may not hold the fastening portion.

Also, in the case of horizontal use, when the grip portion is returned to the original position when the ratchet is driven, the rotating portion stops and tightens when the upper jaw portion is over the corner of the tightening portion. Since the holding portion is not pressed against the attachment portion, the grip portion is pushed again to draw the rotating portion (upper jaw portion) toward the fastening portion so that the rotating portion (upper jaw portion) is pressed and held on the fastening portion again. It must be used, and the user has to learn the knack for this operation (the ratchet drive cannot be performed smoothly unless the user is used to the knack for this operation).

Therefore, in the conventional wrench, the ratchet drive operation cannot be performed smoothly and the work cannot be performed speedily because the rotating portion is in the wobble state.

Further, since the rotating portion is in a wobble state, it is not easy to set or remove the tightening portion so that the lower jaw portion and the upper jaw portion hold the lower jaw portion and the upper jaw portion.

In addition, when the ratchet is driven, the holding portion of the lower jaw and the upper jaw is easily moved in the axial direction of the nut, so that it is necessary to perform the tightening operation while aligning the nut with the nut. is there.

The present invention focuses on such a problem, and the reciprocating operation of the gripping portion can be speedily repeated, the ratchet drive can be performed smoothly, and the gripping operation and the removing operation to the fastening portion are extremely performed. To provide a revolutionary wrench that can be performed smoothly, the holding part is difficult to move in the axial direction of the nut during work, and there is little concern for positioning during work, and the work can be performed extremely efficiently and speedily. The purpose is.

[0018]

The gist of the present invention will be described with reference to the accompanying drawings.

A lower jaw 2 is provided at the distal end of the grip portion 1, and a pivot portion 3 is rotatably provided at the distal end of the grip portion 1, and an upper jaw is provided at the bent distal end of the pivot portion 3. The lower jaw part 2 and the upper jaw part 4 are configured to hold a tightening part 5 such as a nut or a bolt, and the grip part 1 reciprocates in a predetermined direction. In a wrench configured so that the lower jaw portion 2 and the upper jaw portion 4 can perform a ratchet drive while holding the tightening portion 5, the turning portion 3 is prevented from opening and turning outward. An urging body 6 for urging the closing part to rotate in the opposite inward direction is provided on the turning part 3, and the turning part 3 is provided on the turning part 3 against the urging body 6. A lever portion 7 for opening and rotating in the direction
Is configured to protrude to a position where it can be operated by the finger 8 of the hand gripped by the grip portion 1, and the finger 8 applied to the protruding lever portion 7 is pushed to the grip portion 1 side. As a result, the turning portion 3 is opened and turned outward together with the lever portion 7, and the upper jaw portion 4 is separated from the fastening portion 5 held by the lower jaw portion 2 and the upper jaw portion 4. The present invention relates to a wrench, wherein the wrench is configured to retreat outward and release the holding state.

A lower jaw 2 is provided at the distal end of the grip portion 1, and a rotating portion 3 is rotatably provided at the distal end of the grip portion 1. An upper jaw 4 is provided so that the lower jaw 2 and the upper jaw 4 can hold a tightening portion 5 such as a nut or a bolt, and the gripper 1 reciprocates in a predetermined direction. In a wrench configured such that the lower jaw portion 2 and the upper jaw portion 4 can perform a ratchet drive while holding the tightening portion 5 by an operation, the rotating portion 3 is opened and rotated outward. A biasing body 6 is provided in the rotating portion 3 to oppose and close and rotate in the opposite inward direction,
A positioning portion 9 is provided on the rotating portion 3 so as to abut against an end surface, which is an outer surface in the axial direction, of the fastening portion 5 so as to protrude from a holding portion 10 formed by the lower jaw portion 2 and the upper jaw portion 4. A wrench or a wrench according to claim 1.

The plate-like positioning portion 9 is attached to the outer surface of the rotating portion 3, and a part or all of the positioning portion 9 is provided so as to protrude from the inner edge of the rotating portion 3. 9 is provided in a protruding state to the holding portion 10 formed by the lower jaw portion 2 and the upper jaw portion 4, and the positioning portion 9 is retractably movable from a position protruding to the holding portion 10 to a position not protruding. The wrench according to claim 2, wherein the wrench is provided.

The positioning part 9 is connected to the lower jaw part 2.
And a biasing body 11 for biasing the holding portion 10 formed by the upper jaw 4 and the holding portion 10.
4. The wrench according to claim 3, wherein the wrench is provided so as to be retractable from a position protruding to the holding portion 10 formed by the lower jaw portion 2 and the upper jaw portion 4 to a position not protruding. It is related.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention (how to implement the invention) will be briefly described with reference to the drawings, showing the operational effects thereof.

In the present invention, for example, when the nut is tightened and turned as the tightening portion 5, the turning portion 3 is first opened outwardly against the urging body 6 to turn the nut 5 forward. It is arranged between the lower jaw part 2 and the upper jaw part 4, and the rotating part 3 is closed and rotated inward by the urging force of the urging body 6, so that the nut 5 is moved to the lower jaw part 2 and the upper jaw part. 4 and hold in a detented state.

In this state, when the grip portion 1 is pushed in a predetermined direction, the pushing force is applied to the nut 5 as a rotational driving force, and the nut 5 held by the lower jaw portion 2 and the upper jaw portion 4 is moved. Is rotated by tightening.

On the other hand, when the grip portion 1 is moved in the reverse direction and returned to the initial position, a force acts outward on the rotating portion 3, and
Therefore, the rotating portion 3 is opened and rotated outwardly against the urging body 6.

The lower jaw 2 is moved by the retreating movement of the rotating part 3.
While the upper jaw 4 holds the nut 5, no rotational driving force is applied to the nut 5 by the return movement of the grip 1.

That is, in the case of a hexagonal nut, when the grip portion 1 is moved back after the tightening rotation, no rotation driving force is applied to the nut 5, and the lower jaw portion 2 and the upper jaw portion 4 5 is configured to move while changing the holding position while keeping the holding state pressed against the outer surface while climbing over the outer surface of the corner.

Therefore, by repeating the operation of reciprocating the grip portion 1 in a predetermined direction, the lower jaw portion 2 and the upper jaw portion 4 hold and hold the nut 5 in the movement in one direction. In the return movement in the opposite direction, the nut 5 is held without rotating drive force by changing the holding position of the lower jaw portion 2 and the upper jaw portion 4 during the return movement in the opposite direction. The position of the holding portion 1 can be returned to the original position, and the nut 5 can be tightened and rotated only by reciprocating the gripping portion 1 without holding the nut 5 securely and without fluttering of the rotating portion 3. Ratchet drive can be performed.

Therefore, unlike the conventional example, since the rotating portion 3 is always urged inward, when returning the grip portion 1 to the original position in the ratchet drive as described above, the rotating portion 3 Did not rotate more than necessary, and while holding over the corner of the tightening portion 5, the holding position was changed while holding the pressing portion against the outer surface, and the tightening portion 5 was always held securely by the urging force. It will be kept in a state. Therefore, since the pivoting portion 3 does not open greatly outside due to its own weight, and the upper jaw 4 of the pivoting portion 3 does not separate from the tightening portion 5 even in horizontal pivoting, the operator needs to operate as in the conventional case. The ratchet drive can be performed simply by reciprocating the grip portion 1 without having to learn the technique of the ratchet drive operation, and even if the operator is not used to the technique, the ratchet drive is very smooth and speedy. Thus, the turning operation can be performed.

According to the first aspect of the present invention, when the lower jaw 2 and the upper jaw 4 are set so as to be held on the tightening portion 5 such as a nut or a bolt, that is, the tightening portion 5 In addition, it is necessary to turn the turning portion 3 provided with the upper jaw portion 4 to open outward largely against the biasing body 6, and at this time, while holding the holding portion 1, By extending the gripping finger 8 to the lever 7 protruding from the rotating unit 3 and pulling it toward the gripping unit 1, the rotating unit 3 is opened and rotated outward. .

Therefore, when the fastening portion 5 is to be held,
The rotating part 3 is opened and rotated by the fingers 8 of the gripping hand, the upper jaw part 4 is retracted outward, and the holding part 10 is opened.
When the tightening portion 5 is set at a predetermined position with respect to the lower jaw portion 2 and the finger is released from the lever portion 7 or the pulling force of the finger 8 is weakened, the rotating portion 3 is moved inward by the urging force of the urging body 6. Then, the tightening portion 5 is automatically held by the lower jaw portion 2 and the upper jaw portion 4. The same applies to the case of removing from the fastening portion 5.

Accordingly, the attachment / detachment to / from the fastening portion 5 can be performed very easily and speedily.

As a method of opening and rotating the rotating portion 3 outwardly, the rotating portion 3 is pinched by a finger and moved outwardly. Although it is possible to open and rotate the rotating part 3 by pressing the outer surface of the upper jaw part 4, it is necessary to set the urging force of the urging body 6 to be large in order to make the ratchet drive smooth. In addition, when the pressing portion 5 is pressed, the outer surface of the tightening portion 5 is slippery, and the upper jaw portion 4 pushes the rotating portion 3 to the position where the upper jaw portion 4 can hold the tightening portion 5 to open and rotate. When the lower jaw portion 2 and the upper jaw portion 4 hold the fastening portion 5 by the return, the holding portion 10 is easily moved with respect to the fastening portion 5. In many cases, the holding set cannot be performed smoothly.

That is, in the present invention, the grip portion 1
The pivoting portion 3 can be opened and pivoted simply by pulling the finger 8 while holding the gripper, and the pivoting portion 3 can be fully opened and pivoted to open the holding portion 10 greatly. The lower jaw part 2 and the upper jaw part 4 can be set smoothly at the position.

On the other hand, according to the second aspect of the present invention, since the positioning portion 9 protrudes from the holding portion 10 between the lower jaw portion 2 and the upper jaw portion 4, the fastening portion 5 in the axial direction is provided. The positioning portion 9 can be brought into contact with the outer end surface.

Therefore, the holding portion 10 is formed by the positioning portion 9.
The position of the tightening portion 5 is prevented from being shifted with respect to, so that the tightening portion 5 is difficult to move even when the ratchet drive is repeated, and the holding state is always ensured by the urging force of the urging body 6. In addition to the fact that the holding position is held, the trouble of performing the work while being careful not to disengage and disengage from the fastening portion 5 as in the related art is reduced.

In the turning operation of the wrench, it is most noticeable that the wrench comes off from the tightening portion 5. In particular, in the present invention, the holding position is fixedly fixed to the tightening portion 5. Since the position of the holding portion 10 moves in the rotation direction with respect to the tightening portion 5 because of the ratchet mechanism described above instead of the method of performing the work as it is, it also moves in the axial direction of the tightening portion 5. It is easy to work while paying attention to this movement and always adjusting the position so as not to come off from the fastening portion 5 in the ratchet drive, and the operation cannot be performed smoothly.

In this regard, the present invention has found such a drawback in the wrench of the ratchet mechanism as described above, and has solved the drawback.

That is, even in the gripping set, the end face of the tightening portion 5 can be always set at an appropriate position by contacting the end surface of the tightening portion 5 with the positioning portion 9, and the end surface of the tightening portion 5 is pressed against the positioning portion 9. By performing the ratchet drive as described above, the displacement can be easily prevented.

Further, according to the third aspect of the present invention, if the positioning portion 9 is unnecessary, or if it is obstructed if it protrudes, it can be retracted.

Further, in the invention according to claim 4,
Further, the positioning set in which the positioning portion 9 is brought into contact with the end face of the fastening portion 5 can be performed very easily.

That is, when the positioning portion 9 is not located on the end surface of the fastening portion 5 but located on the fastening outer surface (hexagonal outer surface) when the fastening portion 5 is held, the positioning portion 9 is biased. Body 11
When the gripper 1 is automatically retracted and the holding position is moved slightly in the axial direction of the tightening portion 5, the positioning portion 9 is moved to the outer surface of the tightening portion 5 in the axial direction. When the end surface is reached, the urging body 11 automatically projects by the return force.

Accordingly, when positioning setting is desired,
By slightly shifting the holding position to make the positioning portion 9 protrude, the ratchet drive is performed while giving a force to slightly shift in the opposite direction again, so that the work can be performed in the positioning state, and the positioning portion 9 is unnecessary. In the event that the wrench is in the way, it will be automatically evacuated against the urging body 11 and will be a revolutionary wrench with excellent practicality.

[0045]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described with reference to the drawings.

A lower jaw 2 which is in contact with one side surface of a hexagonal tightening portion 5 such as a nut or bolt head is formed at the tip edge of the rod-like gripping portion 1.

A rotating portion 3 having a plate-like shape and a bent tip portion is pivotally attached to the tip portion of the grip portion 1.

A fitting groove 13 is provided at the base end of the rotating part 3, and the distal end of the gripping part 1 is inserted and fitted into the fitting groove 13, and is axially fixed and pivotally mounted. .

The pivoting portion 12 is provided with an urging body 6 such as a coil spring for urging the turning portion 3 to open and turn outward and to close and turn in the opposite direction. And
The rotating portion 3 is configured to be constantly biased inward.

When the rotating portion 3 does not hold the fastening portion 5, the rotating portion 3 abuts against the thick step portion of the lower jaw portion 2 by the urging force of the urging body 6 and is locked.

An upper jaw 4 is formed at the bent end of the rotating part 3. The upper jaw 4 is provided with a hook-shaped holding inner surface 4A at a position facing the lower jaw 2,
The tip of the holding inner surface 4A abuts one side surface of the hexagonal fastening portion 5, and the side of the holding inner surface 4A and the lower jaw portion 2 has one side of the hexagonal fastening portion 5. A holding inner surface 4B is formed in contact with the upper surface of the upper jaw 4 and the lower jaw 2 is held at the three-point contact between the two holding inner surfaces 4A and 4B and the lower jaw 2. And

Accordingly, for example, when the nut is tightened and turned as the tightening portion 5, the turning portion 3 is first opened outwardly against the urging body 6 to rotate the nut 5 to the lower jaw. The rotary unit 3 is disposed between the upper jaw 4 and the upper jaw 4, and the rotating unit 3 is closed and rotated inward by the urging force of the urging body 6, and the nut 5 is connected to the lower jaw 2 and the upper jaw 4. Hold it in a detented state.

When the grip portion 1 is pushed in a predetermined direction in this state, the pushing force is applied to the nut 5 as a rotational driving force, and the nut 5 held by the lower jaw portion 2 and the upper jaw portion 4 is moved. Is rotated by tightening.

On the other hand, when the grip portion 1 is moved in the opposite direction to return to the initial position, a force acts on the rotating portion 3 in the outward direction.
Therefore, the rotating portion 3 is opened and rotated outwardly against the urging body 6.

The lower jaw 2 is moved by the retreating movement of the rotating part 3.
While the upper jaw 4 holds the nut 5, no rotational driving force is applied to the nut 5 by the return movement of the grip 1.

That is, in the case of a hexagonal nut, when the grip portion 1 returns after the tightening rotation, no rotation driving force is applied to the nut 5, and the lower jaw portion 2 and the upper jaw portion 4 are connected to each other by the nut. 5 is configured to move while changing the holding position while keeping the holding state pressed against the outer surface while climbing over the outer surface of the corner.

Therefore, by repeating the operation of reciprocating the grip portion 1 in a predetermined direction, the lower jaw portion 2 and the upper jaw portion 4 lock and hold the nut 5 in the movement in one direction. In the return movement in the opposite direction, the nut 5 is held without rotating drive force by changing the holding position of the lower jaw portion 2 and the upper jaw portion 4 during the return movement in the opposite direction. The position of the holding portion 1 can be returned to the original position, and the nut 5 can be tightened and rotated only by reciprocating the gripping portion 1 without holding the nut 5 securely and without fluttering of the rotating portion 3. Ratchet drive can be performed.

Accordingly, unlike the conventional example, since the rotating portion 3 is constantly urged inward, when the grip portion 1 is returned to the original position in the ratchet drive as described above, the rotating portion 3 Did not rotate more than necessary, and while holding over the corner of the tightening portion 5, the holding position was changed while holding the pressing portion against the outer surface, and the tightening portion 5 was always held securely by the urging force. It will be kept in a state. Therefore, since the pivoting portion 3 does not open greatly outside due to its own weight, and the upper jaw 4 of the pivoting portion 3 does not separate from the tightening portion 5 even in horizontal pivoting, the operator needs to operate as in the conventional case. The ratchet drive can be performed simply by reciprocating the grip portion 1 without having to learn the technique of the ratchet drive operation, and even if the operator is not used to the technique, the ratchet drive is very smooth and speedy. Thus, the turning operation can be performed.

Next, the lever section 7 and the positioning section 9 will be described.

First, the lever 7 will be described.

In the present embodiment, a lever-shaped lever 7 is attached to the pivot 12 of the pivot 3.

More specifically, the base of the lever portion 7 is
The shaft is fixed so as to rotate integrally with the rotating portion 3 by being superposed on the shaft.

The distal end of the lever 7 is provided so as to be slightly inclined toward the grip portion 1 so as to protrude outward from the rotating portion 3. 1 is configured to protrude to a position that can be operated by the finger 8 of the hand grasped by the user, and the finger 8 applied to the protruding lever 7 is pulled toward the grasping unit 1 to thereby operate the lever 7. At the same time, the turning portion 3 is opened and turned outward, and the upper jaw 4 is retracted outward from the tightening portion 5 held by the lower jaw 2 and the upper jaw 4. Thus, the holding state is released.

Therefore, the operation and effect as described in the "embodiment of the invention" can be surely exerted by providing such a simple structure.

Next, the positioning section 9 will be described.

In this embodiment, the plate-shaped positioning portion 9 is attached to the outer surface of the rotating portion 3, and a part of the positioning portion 9 is provided so as to protrude from the inner edge of the rotating portion 3. Although the portion 9 is provided in a protruding state to the holding portion 10 formed by the lower jaw portion 2 and the upper jaw portion 4, the positioning portion 9 is formed by the lower jaw portion 2 and the upper jaw portion 4. A biasing body 11 for biasing the holding portion 10 to a position protruding toward the holding portion 10 is provided, and the positioning portion 9 is formed by the lower jaw 2 and the upper jaw 4 against the biasing body 11. It is provided so as to be able to retract and move from a position protruding to the portion 10 to a position not protruding.

More specifically, the inner portion of the plate-shaped positioning portion 9 overlaps the outer surface of the rotating portion 3 so as to slightly project from the holding portion 10, and the outer portion of the positioning portion 9 is The pivoting portion 16 is provided on the outer surface of the pivoting portion 3 and is rotatably provided along the outer surface on the outer surface of the rotating portion 3 so that the inner portion of the positioning portion 9 slightly projects from the holding portion 10. It is provided so that it can be freely switched from a retracted state to a retracted state that does not completely project.

Further, a biasing body 11 such as a coil spring is provided on the pivoting portion 16 of the positioning portion 9 so that the positioning portion 9
A guide rod 14 is provided on the outer surface of the rotating part 3, and a guide groove 15 with which the guide rod 14 is engaged is provided in the positioning part 9. The positioning section 9 is configured to protrude / retract and rotate.

That is, when the guide rod 14 comes into contact with the edge of the guide groove 15 by the urging force of the urging body 11, the positioning portion 9 is fixed at a position slightly protruding from the holding portion 10. doing.

Therefore, in this embodiment, the operation and effect described in the above-mentioned "Embodiment of the Invention" can be surely exerted with a very simple structure, the projecting / retracting rotation is smooth, and the mounting strength is low. Improved and durable. Further, the positioning portion 9 can be easily attached and easily applied to an existing wrench, and the positioning portion 9 can be easily provided so as to be able to retreat and move from a predetermined projecting position, which is extremely excellent in practicality. Become a wrench.

[0071]

According to the present invention constructed as described above, the rotating portion is always urged inward unlike the conventional example, so that in the above-described ratchet drive, the grip portion is moved to the original position. When returning to, the rotation part does not open and rotate more than necessary,
This holding position is changed in a holding state in which the holding part is pressed against the outer surface while riding over the corner of the fastening part, and the fastening part is always held in a state of securely holding by the urging force. Therefore, since the rotating part does not open greatly outward due to its own weight, and the upper jaw part of the rotating part does not separate from the fastening part even in the horizontal rotation, the operator can perform the conventional ratchet driving operation. Even if you do not learn the knack, even if you are not an operator who is accustomed to this knack, you can perform ratchet drive simply by reciprocating the gripping part, and you can rotate smoothly by this ratchet drive very quickly Become a wrench.

Further, according to the first aspect of the present invention, an excellent wrench capable of driving a ratchet with a simpler structure is provided, and at the same time, the holding set (holding) to the fastening portion and the removal are very smooth. This is a revolutionary wrench that can be easily and reliably performed, and this operation can be easily performed by finger operation while holding the holding portion.

According to the second aspect of the present invention, the wrench can perform a ratchet drive with the above-described simple structure, and the holding position can be easily positioned with respect to the tightening portion during the ratchet drive. The worries of ratcheting while adjusting the position while working as described above are also greatly reduced (or eliminated), and the work efficiency is dramatically improved, such as extremely efficient and speedy work. Become.

Further, according to the third aspect of the present invention, a positioning portion which achieves the function and effect of the second aspect of the present invention can be easily provided with a simpler configuration, and can be easily applied to an existing wrench. In addition to being applicable, the positioning part can be retracted when the positioning part is unnecessary or rather obstructive, and an epoch-making wrench that is more practical.

According to the fourth aspect of the present invention, a positioning set in which the positioning portion is brought into contact with the axially outer end surface of the fastening portion can be very easily performed.

That is, if the positioning portion is not located on the axial end surface of the fastening portion but is located on the fastening outer surface when the fastening portion is gripped, the positioning portion resists the biasing body. When the positioning part reaches the end face which is the axial outer surface of the fastening part, The projection automatically comes out due to the return force of the urging body.

Therefore, when positioning setting is desired,
After slightly shifting the holding position and projecting the positioning part,
The ratchet drive is performed while applying a force to slightly shift in the opposite direction again, so that the work can be performed in the positioning state, and if the positioning part is unnecessary or obstructed, it automatically retracts against the urging body. As a result, it is a revolutionary wrench that excels in workability and is extremely practical.

[Brief description of the drawings]

FIG. 1 is a perspective view of a use state of the present embodiment.

FIG. 2 is an enlarged explanatory front view of a main part at the time when the rotating part is largely opened and rotated at the time of holding setting according to the embodiment.

FIG. 3 is an enlarged explanatory front view of a main part at the time of holding setting according to the embodiment.

FIG. 4 is an enlarged explanatory front view of a main part at the time of tightening work at the time of completion of the gripping set, in which the holding position after the gripping set of this embodiment is slightly shifted and the positioning part abuts on the end face of the tightening part; It is.

FIG. 5 is a side view of a main part of the embodiment.

FIG. 6 is an explanatory side sectional view of a main part in a use state of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gripping part 2 Lower jaw part 3 Rotating part 4 Upper jaw part 5 Tightening part (nut) 6 Urging body 7 Lever part 8 Finger 9 Positioning part 10 Holding part 11 Urging body

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[Procedure amendment]

[Submission date] February 22, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Wrench

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for holding and holding a tightening portion such as a nut or a bolt when the grip portion is returned to an initial position after the tightening portion is turned or loosened and turned. The present invention relates to a ratchet-driven wrench having a configuration in which a rotation driving force is not applied to a fastening portion, and which can fasten and rotate the fastening portion by reciprocating the grip portion in a predetermined direction, and can loosen and rotate the fastening portion. .

[0002]

2. Description of the Related Art The following ratchet-driven wrench is popular.

The prior art will be described with reference to the drawings showing an embodiment of the present invention. The rotating portion 3 is rotatable so as to protrude laterally at the tip of a rod-like gripping portion 1. The pivoting portion 3 is bent in a hook shape so that the tip portion is disposed at a position facing the lower jaw portion 2.
An upper jaw 4 is provided at the bent end portion of the gripping portion. The upper jaw 4 is formed in an inner surface shape capable of holding and locking a tightening portion 5 such as a nut or a bolt in a detented state. By a reciprocating operation in a predetermined direction, the lower jaw part 2 and the upper jaw part 4 are configured to be able to perform a ratchet drive while holding the tightening part 5.

Therefore, for example, when the nut is tightened and turned as the tightening portion 5, the turning portion 3 is first opened and turned outward to rotate the nut 5 between the lower jaw portion 2 and the upper jaw portion 4. The lower part 2 and the upper jaw part 4 hold the nut 5 in a detented state by closing and rotating the rotating part 3 inward.

When the grip portion 1 is pushed in a predetermined direction in this state, the pushing force is applied to the nut 5 as a rotational driving force, and the nut 5 held by the lower jaw portion 2 and the upper jaw portion 4 is moved. Is rotated by tightening.

On the other hand, when the grip portion 1 is moved in the opposite direction to return to the initial position, a force acts on the rotating portion 3 outwardly,
Therefore, the rotating portion 3 is opened and rotated outward.

The lower jaw 2 is moved by the retreating movement of the rotating part 3.
While the upper jaw 4 holds the nut 5, no rotational driving force is applied to the nut 5 by the return movement of the grip 1.

That is, in the case of a hexagonal nut, when the grip portion 1 returns after the tightening rotation, no rotation driving force is applied to the nut 5, and the lower jaw portion 2 and the upper jaw portion 4 are connected to each other by the nut. 5 is configured to move while changing the holding position while getting over the outer surface of the corner.

Therefore, by repeatedly performing the operation of reciprocating the grip portion 1 in a predetermined direction, the lower jaw portion 2 and the upper jaw portion 4 hold and hold the nut 5 in the movement in one direction. In the return movement in the opposite direction, the rotating portion 3 is freely opened and rotated outward, so that the lower jaw portion 2 and the upper jaw portion 4 are held together. Is changed, the rotation driving force is not applied to the nut 5 and the position of the grip portion 1 can be returned to the original position. The nut 5 can be moved only by reciprocating the grip portion 1 while holding the nut 5. This is a configuration in which a ratchet drive capable of tightening and rotating can be performed.

[0010] Therefore, in this conventional example, it is possible to provide a wrench capable of realizing a ratchet drive without requiring a complicated configuration or processing.

[0011]

However, in such a ratchet-driven wrench, the rotating portion provided with the upper jaw is freely openable and rotatable outward, and is biased by a spring. It is in a so-called wobble state without being performed.

For this reason, depending on the working angle, the rotating portion may open and rotate outward due to its own weight, and may not hold the fastening portion.

Also, in the case of horizontal use, when the grip portion is returned to the original position when the ratchet is driven, the rotating portion stops and tightens when the upper jaw portion is over the corner of the tightening portion. Since the holding portion is not pressed against the attachment portion, the grip portion is pushed again to draw the rotating portion (upper jaw portion) toward the fastening portion so that the rotating portion (upper jaw portion) is pressed and held on the fastening portion again. It must be used, and the user has to learn the knack for this operation (the ratchet drive cannot be performed smoothly unless the user is used to the knack for this operation).

Therefore, in the conventional wrench, the ratchet drive operation cannot be performed smoothly and the work cannot be performed speedily because the rotating portion is in the wobble state.

Further, since the rotating portion is in a wobble state, it is not easy to set or remove the tightening portion so that the lower jaw portion and the upper jaw portion hold the lower jaw portion and the upper jaw portion.

In addition, when the ratchet is driven, the holding portion of the lower jaw and the upper jaw is easily moved in the axial direction of the nut, so that it is necessary to perform the tightening operation while aligning the nut with the nut. is there.

The present invention focuses on such a problem, and the reciprocating operation of the gripping portion can be speedily repeated, the ratchet drive can be performed smoothly, and the gripping operation and the removing operation to the fastening portion are extremely performed. To provide a revolutionary wrench that can be performed smoothly, the holding part is difficult to move in the axial direction of the nut during work, and there is little concern for positioning during work, and the work can be performed extremely efficiently and speedily. The purpose is.

[0018]

The gist of the present invention will be described with reference to the accompanying drawings.

A lower jaw 2 is provided at the tip of the grip 1
The pivoting portion 3 is provided rotatably at the tip of the grip portion 1 of the
An upper jaw part 4 is provided at a bending end part of the rotating part 3, and the lower jaw part is provided.
Tightening parts such as nuts and bolts between the part 2 and the upper jaw part 4
5 can be held, and a predetermined direction of the grip portion 1
The lower jaw part 2 and the upper jaw part 4 move forward by the reciprocating operation to
Ratchet drive can be performed while holding the fastening part 5
In the wrench configured as described above, the rotating part 3 is
Closes and turns in the opposite inward direction against opening and turning
An urging body 6 for urging the user to rotate
Abuts against an end face which is an axially outer surface of the tightening portion 5 against the portion 3
A plate-shaped positioning section 9 is attached to the outer surface of the rotating section 3 and
A part or the whole of the positioning part 9 of FIG.
The positioning part 9 is provided in the lower jaw part.
2 and the upper jaw 4 are provided so as to protrude into the holding portion 10 formed by the upper jaw 4.
The positioning portion 9 projects to the holding portion 10
Is provided so that it can be retracted and moved to a position where it does not protrude.
It relates to a wrench.

Further , the turning part 3 is attached to the turning part 3 as described above.
Lever for opening and rotating outwardly against the urging body 6
Part 7 is provided, and the lever part 7 is gripped by the grip part 1
It is configured to protrude to a position where it can be operated with the finger 8 of the hand.
The finger 8 applied to the lever 7 protruding toward the grip 1
By the pushing operation, the lever 7 is rotated together with the lever 7.
The lower jaw part 2 and the upper jaw are pivoted open outward.
The upper jaw part 4 starts from the fastening part 5 held by the part 4
Is retracted outward, and the holding state is released.
The wrench according to claim 1, wherein the wrench is configured as follows.
It is related to.

The positioning part 9 is connected to the lower jaw part 2.
To the position protruding into the holding portion 10 formed by the upper jaw 4
An urging body 11 for urging is provided, and the positioning portion 9 is
Formed by the lower jaw 2 and the upper jaw 4 against
Retreat from the position where it protrudes to the holding part 10 to the position where it does not protrude
3. The method according to claim 1, wherein
It relates to the wrench described in the item.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention (how to implement the invention) will be briefly described with reference to the drawings, showing the operational effects thereof.

In the present invention, for example, when the nut is tightened and turned as the tightening portion 5, the turning portion 3 is first opened and turned outwardly against the urging body 6 so that the nut 5 is turned. It is arranged between the lower jaw part 2 and the upper jaw part 4, and the rotating part 3 is closed and rotated inward by the urging force of the urging body 6, so that the nut 5 is moved to the lower jaw part 2 and the upper jaw part. 4 and hold in a detented state.

When the grip portion 1 is pushed in a predetermined direction in this state, the pushing force is applied to the nut 5 as a rotational driving force, and the nut 5 held by the lower jaw portion 2 and the upper jaw portion 4 is moved. Is rotated by tightening.

On the other hand, when the grip portion 1 is moved in the opposite direction to return to the initial position, a force acts on the rotating portion 3 in the outward direction.
Therefore, the rotating portion 3 is opened and rotated outwardly against the urging body 6.

The lower jaw part 2 is moved by the retreating movement of the rotating part 3.
While the upper jaw 4 holds the nut 5, no rotational driving force is applied to the nut 5 by the return movement of the grip 1.

That is, in the case of a hexagonal nut, when the grip portion 1 is moved back after the tightening rotation, no rotation driving force is applied to the nut 5, and the lower jaw portion 2 and the upper jaw portion 4 are connected to each other by the nut. 5 is configured to move while changing the holding position while keeping the holding state pressed against the outer surface while climbing over the outer surface of the corner.

Therefore, by repeating the operation of reciprocating the grip portion 1 in a predetermined direction, the lower jaw portion 2 and the upper jaw portion 4 hold and hold the nut 5 in the one-way movement. In the return movement in the opposite direction, the nut 5 is held without rotating drive force by changing the holding position of the lower jaw portion 2 and the upper jaw portion 4 during the return movement in the opposite direction. The position of the holding portion 1 can be returned to the original position, and the nut 5 can be tightened and rotated only by reciprocating the gripping portion 1 without holding the nut 5 securely and without fluttering of the rotating portion 3. Ratchet drive can be performed.

Therefore, unlike the conventional example, since the rotating portion 3 is always urged inward, when returning the grip portion 1 to the original position in the ratchet drive as described above, the rotating portion 3 Did not rotate more than necessary, and while holding over the corner of the tightening portion 5, the holding position was changed while holding the pressing portion against the outer surface, and the tightening portion 5 was always held securely by the urging force. It will be kept in a state. Therefore, since the pivoting portion 3 does not open greatly outside due to its own weight, and the upper jaw 4 of the pivoting portion 3 does not separate from the tightening portion 5 even in horizontal pivoting, the operator needs to operate as in the conventional case. The ratchet drive can be performed simply by reciprocating the grip portion 1 without having to learn the technique of the ratchet drive operation, and even if the operator is not used to the technique, the ratchet drive is very smooth and speedy. Thus, the turning operation can be performed.

According to the second aspect of the present invention, when the lower jaw 2 and the upper jaw 4 are set so as to be held by the tightening portion 5 such as a nut or a bolt, that is, the tightening portion 5 In addition, it is necessary to turn the turning portion 3 provided with the upper jaw portion 4 to open outward largely against the biasing body 6, and at this time, while holding the holding portion 1, By extending the gripping finger 8 to the lever 7 protruding from the rotating unit 3 and pulling it toward the gripping unit 1, the rotating unit 3 is opened and rotated outward. .

Therefore, when the fastening portion 5 is to be held,
The rotating part 3 is opened and rotated by the fingers 8 of the gripping hand, the upper jaw part 4 is retracted outward, and the holding part 10 is opened.
When the tightening portion 5 is set at a predetermined position with respect to the lower jaw portion 2 and the finger is released from the lever portion 7 or the pulling force of the finger 8 is weakened, the rotating portion 3 is moved inward by the urging force of the urging body 6. Then, the tightening portion 5 is automatically held by the lower jaw portion 2 and the upper jaw portion 4. The same applies to the case of removing from the fastening portion 5.

Accordingly, attachment and detachment to and from the fastening portion 5 can be performed very simply and speedily.

As a method of opening and rotating the rotating portion 3 outwardly, the rotating portion 3 is pinched by a finger and moved outwardly. Although it is possible to open and rotate the rotating part 3 by pressing the outer surface of the upper jaw part 4, it is necessary to set the urging force of the urging body 6 to be large in order to make the ratchet drive smooth. In addition, when the pressing portion 5 is pressed, the outer surface of the tightening portion 5 is slippery, and the upper jaw portion 4 pushes the rotating portion 3 to the position where the upper jaw portion 4 can hold the tightening portion 5 to open and rotate. When the lower jaw portion 2 and the upper jaw portion 4 hold the fastening portion 5 by the return, the holding portion 10 is easily moved with respect to the fastening portion 5. In many cases, the holding set cannot be performed smoothly.

That is, in this respect, in the present invention, the grip 1
The pivoting portion 3 can be opened and pivoted simply by pulling the finger 8 while holding the gripper, and the pivoting portion 3 can be fully opened and pivoted to open the holding portion 10 greatly. The lower jaw part 2 and the upper jaw part 4 can be set smoothly at the position.

On the other hand, according to the first aspect of the present invention, since the positioning portion 9 protrudes from the holding portion 10 between the lower jaw portion 2 and the upper jaw portion 4, the fastening portion 5 in the axial direction is provided. The positioning portion 9 can be brought into contact with the outer end surface.

Accordingly, the holding portion 10 is formed by the positioning portion 9.
The position of the tightening portion 5 is prevented from being shifted with respect to, so that the tightening portion 5 is difficult to move even when the ratchet drive is repeated, and the holding state is always ensured by the urging force of the urging body 6. In addition to the fact that the holding position is held, the trouble of performing the work while being careful not to disengage and disengage from the fastening portion 5 as in the related art is reduced.

In the turning operation of the wrench, it is most noticeable that the wrench comes off from the tightening portion 5. In particular, in the present invention, the holding position is fixedly fixed to the tightening portion 5. Since the position of the holding portion 10 moves in the rotation direction with respect to the tightening portion 5 because of the ratchet mechanism described above instead of the method of performing the work as it is, the axial direction of the tightening portion 5 also It is easy to work while paying attention to this movement and always adjusting the position so as not to come off from the fastening portion 5 in the ratchet drive, and the operation cannot be performed smoothly.

In this regard, the present invention has found such a drawback in the wrench of the ratchet mechanism as described above, and has solved the drawback.

That is, in the gripping set, the end face of the tightening portion 5 can always be set at an appropriate position by contacting the end surface of the tightening portion 5 with the positioning portion 9, and the end surface of the tightening portion 5 is pressed against the positioning portion 9. By performing the ratchet drive as described above, the displacement can be easily prevented.

[0040] In a further, the present invention, the positioning portion 9
Can be evacuated if it is unnecessary or if it is obstructed if it protrudes.

Further, in the invention according to claim 3 ,
Further, the positioning set in which the positioning portion 9 is brought into contact with the end face of the fastening portion 5 can be performed very easily.

That is, when the positioning portion 9 is not located on the end surface of the fastening portion 5 but located on the fastening outer surface (hexagonal outer surface) when the fastening portion 5 is gripped, the positioning portion 9 is biased. Body 11
When the gripper 1 is automatically retracted and the holding position is moved slightly in the axial direction of the tightening portion 5, the positioning portion 9 is moved to the outer surface of the tightening portion 5 in the axial direction. When the end surface is reached, the urging body 11 automatically projects by the return force.

Therefore, when positioning setting is desired,
By slightly shifting the holding position to make the positioning portion 9 protrude, the ratchet drive is performed while giving a force to slightly shift in the opposite direction again, so that the work can be performed in the positioning state, and the positioning portion 9 is unnecessary. In the event that the wrench is in the way, it will be automatically evacuated against the urging body 11 and will be a revolutionary wrench with excellent practicality.

[0044]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described with reference to the drawings.

A lower jaw 2 which is in contact with one side surface of a hexagonal tightening portion 5 such as a nut or a bolt head is formed at the tip edge of the rod-like gripping portion 1.

A rotating portion 3 having a plate-like shape and a bent tip portion is pivotally attached to the tip portion of the grip portion 1.

A fitting groove 13 is provided at the base end of the rotating portion 3, and the distal end of the grip portion 1 is inserted and fitted into the fitting groove 13, and is axially fixed and pivotally mounted. .

The pivoting portion 12 is provided with a biasing body 6 such as a coil spring for urging the pivoting portion 3 to pivot open and pivot outward and close and pivot in the opposite direction. And
The rotating portion 3 is configured to be constantly biased inward.

When the rotating portion 3 does not hold the fastening portion 5, the rotating portion 3 abuts against the thick step portion of the lower jaw portion 2 by the urging force of the urging body 6 and is locked.

An upper jaw 4 is formed at the bent end of the rotating part 3. The upper jaw 4 is provided with a hook-shaped holding inner surface 4A at a position facing the lower jaw 2,
The tip of the holding inner surface 4A abuts one side surface of the hexagonal fastening portion 5, and the side of the holding inner surface 4A and the lower jaw portion 2 has one side of the hexagonal fastening portion 5. A holding inner surface 4B is formed in contact with the upper surface of the upper jaw 4 and the lower jaw 2 is held at the three-point contact between the two holding inner surfaces 4A and 4B and the lower jaw 2. And

Therefore, for example, when the nut is tightened and turned as the tightening portion 5, the turning portion 3 is first opened and turned outwardly against the urging body 6 so that the nut 5 is moved to the lower jaw. The rotary unit 3 is disposed between the upper jaw 4 and the upper jaw 4, and the rotating unit 3 is closed and rotated inward by the urging force of the urging body 6, and the nut 5 is connected to the lower jaw 2 and the upper jaw 4. Hold it in a detented state.

When the grip portion 1 is pushed in a predetermined direction in this state, the pushing force is applied to the nut 5 as a rotational driving force, and the nut 5 held by the lower jaw portion 2 and the upper jaw portion 4 is moved. Is rotated by tightening.

On the other hand, when the grip portion 1 is moved in the opposite direction to return to the initial position, a force acts on the rotating portion 3 in the outward direction.
Therefore, the rotating portion 3 is opened and rotated outwardly against the urging body 6.

The lower jaw 2 is moved by the retreating movement of the rotating part 3.
While the upper jaw 4 holds the nut 5, no rotational driving force is applied to the nut 5 by the return movement of the grip 1.

That is, in the case of a hexagonal nut, when the grip portion 1 is moved back after the tightening rotation, no rotational driving force is applied to the nut 5, and the lower jaw portion 2 and the upper jaw portion 4 are connected to each other by the nut. 5 is configured to move while changing the holding position while keeping the holding state pressed against the outer surface while climbing over the outer surface of the corner.

Therefore, by repeating the operation of reciprocating the grip portion 1 in a predetermined direction, the lower jaw portion 2 and the upper jaw portion 4 hold and hold the nut 5 in the movement in one direction. In the return movement in the opposite direction, the nut 5 is held without rotating drive force by changing the holding position of the lower jaw portion 2 and the upper jaw portion 4 during the return movement in the opposite direction. The position of the holding portion 1 can be returned to the original position, and the nut 5 can be tightened and rotated only by reciprocating the gripping portion 1 without holding the nut 5 securely and without fluttering of the rotating portion 3. Ratchet drive can be performed.

Accordingly, unlike the conventional example, since the rotating portion 3 is constantly urged inward, when returning the grip portion 1 to the original position in the ratchet drive as described above, the rotating portion 3 Did not rotate more than necessary, and while holding over the corner of the tightening portion 5, the holding position was changed while holding the pressing portion against the outer surface, and the tightening portion 5 was always held securely by the urging force. It will be kept in a state. Therefore, since the pivoting portion 3 does not open greatly outside due to its own weight, and the upper jaw 4 of the pivoting portion 3 does not separate from the tightening portion 5 even in horizontal pivoting, the operator needs to operate as in the conventional case. The ratchet drive can be performed simply by reciprocating the grip portion 1 without having to learn the technique of the ratchet drive operation, and even if the operator is not used to the technique, the ratchet drive is very smooth and speedy. Thus, the turning operation can be performed.

Next, the lever section 7 and the positioning section 9 will be described.

First, the lever 7 will be described.

In this embodiment, a lever-shaped lever 7 is attached to the pivot 12 of the pivot 3.

More specifically, the base of the lever portion 7 is
The shaft is fixed so as to rotate integrally with the rotating portion 3 by being superposed on the shaft.

The distal end of the lever 7 is provided so as to be slightly inclined toward the grip portion 1 so as to protrude outward from the rotary portion 3. 1 is configured to protrude to a position that can be operated by the finger 8 of the hand grasped by the user, and the finger 8 applied to the protruding lever 7 is pulled toward the grasping unit 1 to thereby operate the lever 7. At the same time, the turning portion 3 is opened and turned outward, and the upper jaw 4 is retracted outward from the tightening portion 5 held by the lower jaw 2 and the upper jaw 4. Thus, the holding state is released.

Therefore, the operation and effect as described in the "embodiment of the invention" can be surely exhibited by such a simple structure.

Next, the positioning section 9 will be described.

In this embodiment, the plate-shaped positioning portion 9 is attached to the outer surface of the rotating portion 3, and a part of the positioning portion 9 is provided so as to protrude from the inner edge of the rotating portion 3. Although the portion 9 is provided in a protruding state to the holding portion 10 formed by the lower jaw portion 2 and the upper jaw portion 4, the positioning portion 9 is formed by the lower jaw portion 2 and the upper jaw portion 4. A biasing body 11 for biasing the holding portion 10 to a position protruding toward the holding portion 10 is provided, and the positioning portion 9 is formed by the lower jaw 2 and the upper jaw 4 against the biasing body 11. It is provided so as to be able to retract and move from a position protruding to the portion 10 to a position not protruding.

More specifically, the inner portion of the plate-shaped positioning portion 9 overlaps the outer surface of the rotating portion 3 so as to slightly project from the holding portion 10, and the outer portion of the positioning portion 9 is attached to the rotating portion 3. The pivoting portion 16 is provided on the outer surface of the rotating portion 3 and is rotatably provided along the outer surface on the outer surface of the rotating portion 3 so that the inner portion of the positioning portion 9 slightly projects from the holding portion 10. It is provided so that it can be freely switched from a retracted state to a retracted state that does not completely project.

A biasing body 11 such as a coil spring is provided on the pivoting portion 16 of the positioning portion 9 so that the positioning portion 9
A guide rod 14 is provided on the outer surface of the rotating part 3, and a guide groove 15 with which the guide rod 14 is engaged is provided in the positioning part 9. The positioning section 9 is configured to protrude / retract and rotate.

That is, when the guide rod 14 abuts on the edge of the guide groove 15 by the biasing force of the biasing body 11, the positioning portion 9 is fixed to a position slightly protruding from the holding portion 10. doing.

Therefore, in this embodiment, the operation and effect described in the above-mentioned "Embodiment of the Invention" can be reliably achieved with a very simple structure, and the projecting / retracting rotation can be made smooth and the mounting strength can be reduced. Improved and durable. Further, the positioning portion 9 can be easily attached and easily applied to an existing wrench, and the positioning portion 9 can be easily provided so as to be able to retreat and move from a predetermined projecting position, which is extremely excellent in practicality. Become a wrench.

[0070]

According to the present invention constructed as described above, the rotating portion is always urged inward unlike the conventional example, so that in the above-described ratchet drive, the grip portion is moved to the original position. When returning to, the rotation part does not open and rotate more than necessary,
This holding position is changed in a holding state in which the holding part is pressed against the outer surface while riding over the corner of the fastening part, and the fastening part is always held in a state of securely holding by the urging force. Therefore, since the rotating part does not open greatly outward due to its own weight, and the upper jaw part of the rotating part does not separate from the fastening part even in the horizontal rotation, the operator can perform the conventional ratchet driving operation. Even if you do not learn the knack, even if you are not an operator who is accustomed to this knack, you can perform ratchet drive simply by reciprocating the gripping part, and you can turn smoothly by this ratchet drive very quickly Become a wrench .

[0071] Also, the with a simple configuration is a wrench that allows a ratchet drive, for the retention position can be easily positioned with respect to the fastening portion in a ratchet drive, positioning during operation as in the prior art The worries of ratcheting while working are also greatly reduced (or eliminated), and the work is extremely efficient and speedy.

[0072] Also, in a further the invention, the positioning unit performs the operation and effect of the light before Symbol onset can be easily provided in a more simple structure, can be easily applied to existing wrench positioning unit The positioning part can be retracted when it is unnecessary or rather obstructive, and it is a revolutionary wrench that is more practical.

Further, in the second aspect of the present invention,
With an excellent wrench that can perform ratchet drive with a simple configuration
There is also a holding set (holding)
The removal is very smooth and can be done reliably.
An image that can be easily operated by finger operation while holding the holding part
It becomes a periodical wrench.

Further, according to the third aspect of the present invention, it is possible to very easily perform a positioning set in which the positioning portion is brought into contact with the end surface which is the outer surface of the fastening portion in the axial direction.

That is, when the positioning portion is not located at the end surface which is the axial outer surface of the fastening portion but is located at the fastening outer surface when the fastening portion is gripped, the positioning portion resists the biasing body. When the positioning part reaches the end face which is the axial outer surface of the fastening part, The projection automatically comes out due to the return force of the urging body.

Therefore, when positioning setting is desired,
After slightly shifting the holding position and projecting the positioning part,
The ratchet drive is performed while applying a force to slightly shift in the opposite direction again, so that the work can be performed in the positioning state, and if the positioning part is unnecessary or obstructed, it automatically retracts against the urging body. As a result, it is a revolutionary wrench that excels in workability and is extremely practical.

[Brief description of the drawings]

FIG. 1 is a perspective view of a use state of the present embodiment.

FIG. 2 is an enlarged explanatory front view of a main part at the time when the rotating part is largely opened and rotated at the time of holding setting according to the embodiment.

FIG. 3 is an enlarged explanatory front view of a main part at the time of holding setting according to the embodiment.

FIG. 4 is an enlarged explanatory front view of a main part at the time of tightening work at the time of completion of the gripping set, in which the holding position after the gripping set of this embodiment is slightly shifted and the positioning part abuts on the end face of the tightening part; It is.

FIG. 5 is a side view of a main part of the embodiment.

FIG. 6 is an explanatory side sectional view of a main part in a use state of the present embodiment.

[Description of Signs] 1 Gripping part 2 Lower jaw part 3 Rotating part 4 Upper jaw part 5 Tightening part (nut) 6 Urging body 7 Lever part 8 Finger 9 Positioning part 10 Holding part 11 Urging body

Claims (4)

[Claims] 1. A lower jaw portion is provided at a distal end portion of a grip portion, a pivot portion is rotatably provided at a distal end portion of the grip portion, and an upper jaw portion is provided at a bent distal end portion of the pivot portion. The lower jaw and the upper jaw are configured to hold a tightening portion such as a nut or a bolt, and the lower jaw and the upper jaw are reciprocated in a predetermined direction by the gripping portion. In a wrench configured to be able to perform a ratchet drive while holding the fastening portion with, the rotating portion resists opening and rotating outward.
An urging body for urging the closing rotation in the opposite inward direction is provided in the rotating portion, and the rotating portion is opened and rotated in the outward direction against the urging member. Provide a lever part,
The lever portion is configured to protrude to a position where it can be operated by the finger of the hand gripped by the grip portion, and a finger applied to the protruded lever portion is pushed to the grip portion side to perform a pushing operation. The rotating portion is opened and rotated outward with the lever portion,
The upper jaw is retracted outward from the fastening portion held by the lower jaw and the upper jaw, and the holding state is released. wrench. 2. A lower jaw portion is provided at a distal end portion of the grip portion, a rotating portion is rotatably provided at a distal end portion of the grip portion, and an upper jaw portion is provided at a bent distal end portion of the rotary portion. The lower jaw and the upper jaw are configured to hold a tightening portion such as a nut or a bolt, and the lower jaw and the upper jaw are reciprocated in a predetermined direction by the gripping portion. In a wrench configured to be able to perform a ratchet drive while holding the fastening portion with, the rotating portion resists opening and rotating outward.
An urging body for urging the closing portion to rotate in the opposite inward direction is provided in the turning portion, and the lower jaw portion is provided with a positioning portion that comes into contact with the turning portion in contact with an axial outer end surface of the fastening portion. The wrench according to claim 1, wherein the wrench or the chin is provided so as to protrude from a holding portion formed by the upper jaw portion. 3. A positioning member having a plate shape is attached to an outer surface of the rotating portion, and a part or all of the positioning portion is provided so as to protrude from an inner edge of the rotating portion, and the positioning portion is attached to the lower jaw. 3. A protruding state provided on a holding portion formed by a portion and an upper jaw portion, and the positioning portion is provided so as to be retractable from a position protruding to the holding portion to a position not protruding. The wrench described. 4. An urging body for urging the positioning portion to a position protruding toward a holding portion formed by the lower jaw portion and the upper jaw portion, and the positioning portion is opposed to the urging body. The wrench according to claim 3, wherein the wrench is provided so as to be able to retract and move from a position protruding to a holding portion formed by the lower jaw portion and the upper jaw portion to a position not protruding.