JP2001205570A - Wrench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wrench offering simple construction permitting a reduce in cost and allowing the tightening or loosening of various bolts and nuts different in size without changing parts. SOLUTION: A wrench comprises a fixed portion 3 provided at the end of a gripping portion 2, a movable portion 4 constituting an annular body 16 together with the fixed portion 3, when pivotally mounted on the fixed portion 3 and closed, locking means 5 for locking a free end 18 of the movable portion 4 to the fixed portion 3, and an engaging member 6 for inwardly energizing the fixed portion 3 and/or the movable portion 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrench that is a tool for rotating various bolts and nuts, pipes, circular shafts, or polygonal tubes or shafts.

[0002]

2. Description of the Related Art A conventional wrench, particularly a ratchet wrench 101 as shown in FIG. 9, has a semi-circular fixed portion 103 integrally formed at the tip of a grip portion 102 and one end of a semi-circular movable portion 104. The movable portion 104 is provided so as to be openable and closable by pivotally connecting the portion 104a, and the other end (free end) 1 of the movable portion 104 is provided.
04b can be locked to the fixed portion 103 by the lock mechanism 105.

Further, a fixed portion 103 and a movable portion 104
An annular groove 107 for a socket is formed in the inner peripheral surface 106 of the first embodiment, and annular sockets 108 and 109 (see FIG. 10) formed in half in the annular groove 107 are detachably and rotatably fitted. is there.

[0004] On the outer periphery of the sockets 108 and 109, there is formed a continuous engaging claw 110 having a saw blade shape as shown in the figure. A pin 11 urged in the direction of sockets 108 and 109 by a spring (not shown) is provided in the fixing portion 103.
1, and the pin 111 is engaged between the locking claw 110 at the position of the pin 111.

Therefore, when turning the wrench 101 in one direction while holding the grip 102, the pin 111
0 and the sockets 108 and 109 are fixed
The nut and the like can be turned while being fixed to the moving part 03 and the movable part 104.

A wrench 101 is held by holding the grip 102.
When is rotated in the opposite direction to the above, the locking relationship between the pin 111 and the locking claw 110 is released, and the grip portion 102 can be returned to the original position.

[0007] Therefore, the sockets 108 and 109 are rotated in one direction while holding the grip 102 so that the socket 1
08, 109 can be tightened or loosened (or loosened), and by turning in the opposite direction, the gripper 102 is returned to the original position and the nut or the like is re-inserted. It can be tightened (loose).

[0008]

However, in the ratchet type wrench 101 described above, the annular groove 107 for the socket must be formed along the inner peripheral surface 106 of the fixed portion 103 and the movable portion 104. , This annular groove 1
07, a complicated socket 108, 109 having a shape to be engaged
Has to be manufactured separately, so that there is a problem that the manufacturing cost is increased.

Further, the engaging portions 1 of the sockets 108 and 109
12 cannot engage with bolts and nuts having a diameter smaller than the inner diameter of the sockets 108 and 109,
To accommodate bolts and nuts of different sizes, a plurality of sockets of different diameters had to be prepared and replaced each time. As a result, the cost of manufacturing sockets is further increased, and storage and storage of multiple sockets
I had to pay attention to management.

Further, in the wrench 101, the sockets 108 and 109 must be replaced according to the size of the bolts and nuts to be tightened and loosened as described above. Met.

The present invention has been developed in view of the above points, has a simple structure, can reduce the manufacturing cost, and can replace parts for various kinds of bolts and nuts having different sizes. It is an object of the present invention to provide a wrench that can be tightened and loosened without any problems.

The present invention has the following configuration in order to effectively achieve the above object. That is, claim 1
The wrench of the present invention described above includes a fixed portion provided at the tip of the grip portion, a movable portion that forms an annular body together with the fixed portion when pivotally attached to the fixed portion and closed, and a free end of the movable portion fixed to the fixed portion. And a meshing member provided to urge the fixed portion and / or the movable portion inward.

According to a second aspect of the present invention, the wrench of the present invention comprises a semi-annular fixing portion provided at the tip of the grip portion, and an annular body together with the fixing portion when pivotally attached to one end of the fixing portion and closed. It comprises a semi-annular movable part, locking means for locking the free end of the movable part to the other end of the fixed part, and a meshing member provided to urge the fixed part and / or the movable part inward. It has a configuration.

According to a third aspect of the present invention, there is provided a wrench according to the present invention, comprising: a fixed portion provided at a tip of a grip portion; a movable portion pivotally attached to the fixed portion to form an annular body together with the fixed portion when closed; A locking means for locking the free end of the movable portion to the fixed portion, a holding member or a meshing member provided to urge the movable portion inward, and a through hole formed in the grip portion and the fixed portion, and at least one of the The through-hole is threaded, and the handle is screwed through the through-hole to project a tip into the annular body, and a meshing member or a holding member provided at the tip of the handle.

According to a fourth aspect of the present invention, in the configuration of the wrench according to the first, second or third aspect, the meshing member has a ratchet tooth at a tip thereof, and has a fixed portion and / or a fixed portion.
Alternatively, it is configured to be inserted together with a spring into a hole formed in the inner surface of the movable portion, held by the fixed portion and / or the movable portion by a locking member, and urged from the inner surface toward the center of the annular body. .

According to a fifth aspect of the present invention, in the configuration of the wrench according to the first, second, third or fourth aspect, the meshing member is provided at a plurality of positions of an annular body including a fixed portion and a movable portion. It has a configuration.

The wrench of the present invention according to claim 6 is a wrench according to claim 1, 2, 3, 4, or 5,
The meshing member is provided at a plurality of positions of an annular body including a fixed portion and a movable portion.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing a use state of the wrench of the present invention, FIG. 2 is a perspective view of a state in which a movable part of the wrench of the present invention is opened, and FIG. 3 is a view in which a movable part of the wrench of the present invention is closed. FIG. 4 is a perspective view of a main part of the wrench of the present invention, FIG. 5 is a cross-sectional view showing a cross-section of the main part, and FIG. 6 is an explanatory view showing an enlarged cross-section of the ratchet tooth 26. is there.

In these figures, reference numeral 1 denotes a wrench as an example of the present invention, which includes a gripper 2, a fixed part 3, and a movable part 4.
, Locking means 5, a meshing member 6, and a spring 7 for biasing the meshing member 6 (see FIG. 5).

More specifically, the grip 2
Is the part that the worker grips when operating the wrench 1,
It is formed in a tubular shape, and the rotational torque of the wrench 1 can be increased by inserting the handle A as necessary. Of course, the grip 2 may be long. Further, a torque meter may be provided on the grip portion 2 so that the tightening torque can be displayed.

A fixed part 3 is integrally formed at the tip of the grip part 2. The fixing portion 3 has a semi-annular shape, that is, a shape in which the fixing portion 3 is cut out in a semicircular shape from the bottom side of the triangle to the inside. The thickness width is about 25 mm. The fixing portion 3 may have any shape and thickness as long as the fixing portion 3 is cut out in a semicircular shape and formed entirely in a semi-annular shape.

One end 9 of the movable portion 4 is pivotally connected to one end 8 of the fixed portion 3. That is, one end 8 of the fixed portion 3
Is formed in a concave shape to form a through hole 12. Also,
One end 9 of the movable portion 4 is formed in a convex shape so as to be able to engage with the concave shape, and has a through hole 13 formed therein. One end 8 of the fixed part 3 and one end 9 of the movable part 4 are engaged with each other, and the connecting shaft 10 having a flange (not shown) at one end is inserted into the corresponding through holes 12 and 13. Connecting shaft 10 protruding from one side of
The movable part 4 is pivotally connected to the fixed part 3 by locking a retaining ring 15 in a groove 14 formed on the outer periphery of the other end of the movable part 4.
With this configuration, the movable section 4 is fixed to the fixed section 3.
Can be opened and closed.

The movable portion 4 is formed in a semi-annular shape, that is, formed in a semicircular frame shape as a whole. The thickness width is about 25 mm similarly to the fixing part 3. The movable portion 4 may have any overall shape as long as the movable portion 4 can form an annular body 16 in which a circular hole can be formed at the center together with the fixed portion 3 when closed.

The other end 17 of the fixed part 3 and the other end (free end) 18 of the movable part 4 are provided with locking means 5. The locking means 5 includes a fixed hook 19 provided at the other end 18 of the movable section 4 and a movable hook 20 provided at the other end 17 of the fixed section 3. The fixed hook 19 is fitted in a mounting hole 21 formed in the other end portion 18 of the movable portion 4 and fixed with a screw 22. The movable hook 20 is pivotally attached to the fixed portion 3 so as to be swingable, and is urged by a spring 23 in a direction in which the movable hook 20 meshes with the fixed hook 19.

A meshing member 6 is provided near the center of the fixed portion 3 and near both ends of the movable portion 4 so as to face inward of the annular body 16.

That is, each meshing member 6 (see FIGS. 4 and 5)
Is a vertical section fan-shaped meshing section 24 having a width slightly smaller than the width (thickness) of the fixed section 3 and the movable section 4;
4 comprises a shaft portion 25 projecting from the center of the bottom surface. Meshing part 2
On the upper surface side of 4, a saw-tooth-shaped ratchet tooth 26 continuous in the circumferential direction of the annular body 16 is formed. What is a saw blade
(See FIG. 6), a vertical side 26a, a horizontal side 26b perpendicular to the vertical side 26a, and an inclined side 26c inclined at an obtuse angle to the horizontal side 26b have a continuous shape with one blade portion 26d. . Of course, the one blade portion 26d may have a shape in which an inclined side 26c that is immediately inclined in an acute angle direction from the vertical side 26a is formed.

A hole 27 is formed at an inner surface of the fixed portion 3 and the movable portion 4 where the respective meshing members 6 are provided. The meshing member 6 is formed by inserting the spring 7 into a hole 25 a formed in the shaft portion 25 and providing the meshing member 6 in the hole 27.
The spring 7 can be made to protrude and retract toward the center of the annular body 16 by the elastic biasing.

Further, a through hole 29 is opened in the shaft portion 25 so that the engaging member 6 does not come out of the hole 27, and a locking member 30 is provided in the through hole 29. The through hole 29 is
It is opened considerably larger than the diameter of the shaft portion 25. As a result, the engagement member 6 can move up and down while being locked by the locking member 30. The locking member 30 is formed by threading the outer peripheral surfaces at both ends, and is formed with screw holes 31 a, 3 formed in the width direction at the positions of the holes 27 of the fixed portion 3 and the movable portion 4.
Screwed to 1b.

Each meshing member 6 is held by the fixed portion 3 and the movable portion 4 by being locked by the locking member 30, and can swing in the circumferential direction of the annular body 16. Note that the meshing member 6 can move in the above-described vertical direction,
It may be provided on the fixed part 3 and / or the movable part 4 so as not to swing, or may be fixedly provided on the fixed part 3 and / or the movable part 4.

When the wrench 1 having the above configuration is used, the movable part 4 is opened as shown in FIG.
As shown in FIG. 1, a cylindrical hexagonal nut N is sandwiched between a fixed part 3 and a movable part 4, and the closed movable part 4 is locked by a lock means 5.

At this time, each of the meshing members 6 comes into contact with the vertical side 26a of the one blade portion 26d of the ratchet tooth portion 26 (see FIG. 6) against each inclined surface n of the hexagon nut N, It will sink a little in the hole 27 in opposition.

In this manner, the gripper 2 or the gripper 2
The hex nut N can be tightened (or loosened) by rotating the wrench 1 in the direction of the vertical side 26a of each meshing member 6 with the handle A inserted through the nut A.

By turning the wrench 1 in the opposite direction to the above, one blade 2 of the ratchet teeth 26 of each meshing member 6 can be formed.
The 6d inclined side 26c can slide the inclined surface m of the hexagon nut N one after another to return the wrench 1 together with the handle A to the original position. By turning the mesh member 6 in the direction of the vertical side 26a again, the hexagonal nut N can be further tightened (or loosened).

FIG. 7 shows another example of the wrench 1a of the present invention. The same components as those of the wrench 1 of the above example are denoted by the same reference numerals, and description thereof will be omitted.

In this example, through holes 33 and 34 are formed in the grip portion 2 and the fixing portion 3, and both the through holes 33 and 34 or one of the through holes 33 or 34 is threaded.

The handle 35 which can be screwed through the through holes 33 and 34 to project the tip into the annular body 16 is also threaded, so that the handle 35 can be screwed to the grip portion 2. is there. The handle 35 is threaded so that its tip can approach the vicinity of the movable part 4.

An arc-shaped holding member 36 smaller than a semicircle is screwed to the tip of the handle 35. Of course, the mounting structure of the holding member 36 to the tip of the handle 35 may be any structure as long as the holding member 36 can be attached to the tip of the handle 35.

The movable member 4 includes the meshing member 6 with the wrench 1.
It is provided in the same manner as described above.

The engaging member 6 is provided at the tip of the handle 35,
The holding member 3 is located at the position of the movable portion 4 facing the engagement member 6.
6 may be provided.

On the inner surface side of the holding member 36, a ratchet tooth portion 36a similar to the ratchet tooth portion 26 of the engaging member 6 (see FIG. 6) is formed. Of course, the holding member 36 may be a flat surface without the ratchet teeth 36a.

In the wrench 1a of this example, the handle 35 is screwed so that the holding member 36 can be sent in the direction of the movable portion 4 forming the annular body 16, and the diameter of the hex nut or the like that is tightened or loosened is adjusted. However, even if it is considerably smaller than the inner diameter of the annular body 16, it can be tightened or loosened.

FIG. 8 shows still another wrench 1b of the present invention. Note that the same components as those of the wrenches 1 and 1a in the above example are denoted by the same reference numerals and description thereof will be omitted.

In this example, a meshing member 44 is provided at the tip of the handle 35. The shape of the meshing member 44 is the same as that of the ratchet tooth 26 (see FIG. 6). The meshing member 44 may be formed integrally with the tip of the handle 35 or may be separate from the handle 35.

At the position of the movable part 4 facing the meshing member 44, a semicircular or arc-shaped holding member 36 smaller than the semicircle is provided.

The holding member 36 includes an arc portion 37 and a shaft portion 3.
8 The shaft portion 38 is formed by cutting out from the end on the side of the arc portion 37 to the middle of the shaft portion 38 to form a locking portion 41 capable of locking a screw 43 described later. This holding member 36
A hole 39 is formed in the movable portion 4 at the position where is provided so as not to penetrate from the inner surface side of the movable portion 4. This hole 39 has a spring 40
At the same time, by inserting the shaft portion 38, the holding member 36 is urged toward the meshing member 44 at the tip of the handle 35.

Therefore, a screw hole 42 is formed from the side surface of the movable part 4 to the hole 39 so that the holding member 36 does not jump out of the movable part 4 by the bias of the spring 40. Is screwed, the locking portion 41 of the shaft portion 38 is locked to the tip of the screw 43.

In the wrench 1b having the above structure, when used, the movable part 4 is opened, the hexagon nut N (see FIG. 1) is sandwiched between the fixed part 3 and the movable part 4, and the movable part 4 is closed. Lock by the lock means 5.

Next, the handle 35 (see FIG. 8) is screwed into the handle 3
The meshing member 44 at the tip of No. 5 is connected to a hexagon nut N (see FIG. 1).
Press to the side. By rotating the handle 35 in a predetermined direction in this manner, the hexagon nut N can be tightened or loosened.

In the wrench 1b, the fixed part 3 and the movable part 4
Any member such as a hexagonal nut N that can be tightened or loosened into the annular body 16 composed of the following can be tightened or loosened.

In the wrench 1b shown in FIG. 8, the holding member 36 is formed by inserting the shaft portion 38 into a through hole formed in the movable portion 4 and attaching a nut or a split pin to the protruding outer end. The movable section 4 may be provided so that the movable section 4 can move inward and outward. The shaft 3 is formed in a bolt shape having a head.
7 may be rotatably and detachably provided. In this case, the through hole formed in the movable portion 4 is a screw hole, and the shaft portion 3
May be screwed together so as to be able to move in and out.

[0051]

As is apparent from the above description, the wrench of the present invention has a fastening member such as a nut sandwiched between a movable part and a fixed part, and when the movable part is locked to the fixed part, the fixed part and / or A meshing member that urges the movable portion inwardly engages with the tightening member, and can be easily tightened or loosened by operating the grip portion. Therefore, according to the wrench of the present invention, the tightening and loosening work can be performed even with the fastening members having slightly different sizes (diameters) without replacing the socket as in the related art.

Further, in the wrench of the present invention in which the meshing member or the holding member is provided at the tip of the handle, any fastening member that can be held between the fixed portion and the movable portion by sending the tip of the handle to the movable portion side is used. Even members of a size (diameter) can be securely tightened and loosened.

Further, since the meshing member has a ratchet tooth at the tip and is urged toward the center of the annular body, the ratchet tooth is securely engaged with the tightening member, and tightening is performed.
Loosening work can be performed reliably. In addition, since the tip of the meshing member is a ratchet tooth portion, the grip portion and the handle can be easily returned to the original position, and tightening and loosening work can be performed, which is also favorable in terms of work efficiency. .

Further, since the meshing members are provided at a plurality of positions of the annular body including the fixed portion and the movable portion, any one of the meshing members can be securely engaged with various polygonal members. Can be tightened and loosened.

Further, by providing the meshing members at the central portion of the fixed portion and at the two portions of the movable portion, it is possible to cope with most tightening members and to perform the tightening and loosening work effectively.

[0056]

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of use when turning a nut with a wrench of the present invention.

FIG. 2 is a perspective view of the wrench of one example of the present invention in which a movable portion 4 is opened.

FIG. 3 is a perspective view of a wrench according to an example of the present invention, in which a movable portion 4 is closed.

FIG. 4 is a perspective view of a main part of the wrench of the present invention.

FIG. 5 is a cross-sectional view of FIG.

FIG. 6 is an explanatory diagram of a ratchet tooth portion.

FIG. 7 is a front view of a wrench of another example of the present invention.

FIG. 8 is a front view of a wrench according to still another example of the present invention.

FIG. 9 is an explanatory view in which a part of a conventional ratchet wrench is cut away.

FIG. 10 is a front view of a socket of a conventional ratchet wrench.

[Explanation of symbols]

 Reference Signs List 1 wrench 2 gripping part 3 fixing part 4 movable part 5 locking means 6 engaging member 7 spring 8 one end of fixing part 16 annular body 18 free end 27 hole 26 ratchet tooth part 30 locking member 33 through hole 34 through hole 35 handle 36 Nipping member 44 Toothing member

Claims (6)

[Claims] 1. A fixed portion provided at the tip of a grip portion, a movable portion that forms an annular body together with the fixed portion when pivotally attached to the fixed portion and closed, and a free end of the movable portion is locked to the fixed portion. A wrench comprising a locking means and a meshing member provided to urge the fixed portion and / or the movable portion inward. 2. A semi-circular fixed portion provided at the tip of the grip portion, a semi-circular movable portion that forms an annular body together with the fixed portion when pivotally attached to one end of the fixed portion and closed, and a movable portion. A wrench comprising: locking means for locking the free end of the fixed portion to the other end of the fixed portion; and a meshing member provided to urge the fixed portion and / or the movable portion inward. 3. A fixed portion provided at the tip of the grip portion, a movable portion that forms an annular body together with the fixed portion when pivotally attached to the fixed portion and closed, and a free end of the movable portion is locked to the fixed portion. A locking means, a holding member or a meshing member provided to urge the movable portion inward, and a through hole formed in the grip portion and the fixed portion, and at least one of the through holes is threaded; A wrench comprising a handle which can be screwed into the annular body to project a tip into the annular body, and a meshing member or a holding member provided at the tip of the handle. 4. The meshing member has a ratchet tooth at its tip, is inserted together with a spring into a hole formed on the inner surface of the fixed part and / or the movable part, and is fixed by a locking member to the fixed part and / or the movable part.
4. The wrench according to claim 1, wherein the wrench is held by a movable portion and is urged from the inner surface toward a center of the annular body. 5. 5. The method according to claim 1, wherein the engaging member is provided at a plurality of positions of an annular body including a fixed portion and a movable portion.
Or the wrench according to 4. 6. The wrench according to claim 1, wherein said meshing member is provided at a central portion of a fixed portion and at two positions of a movable portion.