JP2556435B2 - wrench - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrench, and more particularly to a wrench that allows nuts and the like to be fastened and removed by reciprocating rotation of a handle without re-engaging the nuts and the like.

[0002]

2. Description of the Related Art As a wrench for tightening a nut, a socket wrench, for example, can be operated only by reciprocal rotation of a handle, and the nut can be engaged only once. What you did already exists. In this conventional socket wrench, the socket with which the nut is engaged is rotatably and exchangeably supported at the tip of the handle, and the nut can be tightened only by reciprocating the handle. It is a very convenient tool.

Since the socket of the socket wrench has a constant thickness, the tip of the handle that encloses the socket wrench is considerably thick.
Moreover, since the mechanism for unidirectionally rotating the socket is incorporated in the tip portion, the tip portion of this conventional socket wrench is very thick. Therefore, it is considerably convenient to use this wrench in a place where the outside of the nut is widely opened, but as shown in (a) of FIG. 2, for example,
Use the socket wrench if the clearance between the target nut and the wall is very small and the socket wrench described above cannot be inserted, such as when performing maintenance on mechanical equipment installed on the wall side. It cannot be done.

Further, the rotating body is provided with two screw portions opposite to each other like a turnbuckle and a reverse screw pipe joint, and a metal rod and a pipe are respectively screwed to the screw portions. By rotating the whole as much as possible, there is one in which a metal rod and a pipe are simultaneously brought into contact with two screw parts. Therefore, in order to actually use these turnbuckles and reverse threaded pipe joints, it is necessary to rotate them as a whole, but generally they were rotated using a monkey wrench or pipe wrench. It is a thing. However,
Unlike the socket wrench described above, these monkey wrench and pipe wrench cannot be engaged with the rotating body in one time, so the handle is rotated a little to re-engage the rotating body. It is inconvenient that you have to start over and repeat this many times.

Of course, the two metal rods to be connected by the turnbuckle and the two pipes to be connected by the reverse threaded pipe joint are often arranged along the wall or floor. The turning range of the tool handle is very limited,
Ru Nodea must very frequent engagement of the tool to the driven rotating body mentioned above. To solve this, for example
For example, as shown in Japanese Utility Model Publication No. 63-201059.
A "turnbuckle tightening lever" has been proposed,
As shown in Fig. 10, this lever is
A pawl that has a cut 5 from the outer periphery through the center in the end
The vehicle 2 mounts its double-sided cylinder shafts 3 and 3 in both cylinder bearings 4 and 4, respectively.
Since they are loosely fitted and loosely fit, the ratchet wheel 2
Is wrapped around the tip of the handle 1
In addition, the handle 1 is thicker than the handle 1. Will be
And as described in paragraph 0003 above, in a narrow space
If you try to rotate the
There is no. The above is the actual development shown in FIG.
No. 60-36165, "Opening with ratchet
The same applies to the "lunch".

[0006] Therefore, the inventor of the present invention how to make a tool such as a nut and a turnbuckle in a narrow space that can be easily fastened and removed. As a result of various studies on the above, the present invention has been completed.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to surely rotate a rotated body in a narrow space. Is.

The object of the invention as set forth in claim 1 is to reduce the engagement with the object to be rotated and to fasten or remove the object to be rotated only by the reciprocal movement of the handle, and It is an object of the present invention to provide a wrench with a simple configuration that allows a rotating body to be engaged with a rotated body to be largely projected to perform fastening and the like even in a narrow space.

The object of the invention according to claim 2 is to achieve the same object as the invention according to claim 1, and to insert a tool on both sides such as a turnbuckle. An object of the present invention is to provide a wrench that can reliably perform its rotating operation, even if it has a structure that does not allow it.

The object of the invention according to claim 3 is to achieve the same object as in claim 1, and to prevent rotation of the rotary plate when necessary by a simple structure. The purpose is to provide a wrench that can be used.

[0011]

In order to solve the above-mentioned problems, the means adopted by the invention according to claim 1 will be described with reference to the reference numerals used in the embodiments.
10, a turnbuckle 220 or the like has a fitting portion 23 into which the rotated body is fitted from the outside in a substantially center in order to rotate and fasten or remove the rotated body, and a large number of locks are provided on the outer periphery. A disk-shaped rotating body 20 having a portion 22, a handle 10 rotatably holding the rotating body 20, and a handle 10
A wrench 100 provided with a stopper 30 provided at a tip portion 11 of the rotator 20 for selectively stopping rotation of the rotating body 20,
An arcuate shape that is longer than the opening width of the fitting portion 23 and is convex on the handle 10 side at the tip 11 of the handle 10.
Of forming the engagement portion 13, a substantially circular engaging portion 21 which engages with the engaging portion 13, and formed on at least one surface of the rotary plate 20, the rotating plate 2 0 engaging portion 21 handle by assembling the 10-side rotary plate 20 is engaged with the engaging portion 13 of the handle 10, the center of the rotary plate 20 is located outside of the distal end portion 11 of the handle 10, or one rotary plate 20 The wrench 100 "is characterized in that at least half of the surface of the wrench is exposed from the tip of the handle 10.

That is, the wrench 100 is rotatably supported at the tip of the handle 10 by a rotary plate 20 having a fitting portion 23, which is fitted to a rotating body such as a nut 210, at a substantially center thereof. , Its support is the tip 1 of the handle 10.
The semi-arcuate engaging portion 13 provided on the first side and the arcuate engaging portion 21 provided on the rotating plate 20 side. Of course, in this case, the tip 11 of the handle 10
With the cover 40 integrated therewith, a part of the rotating plate 20 is wrapped, but the engaging portion 13 on the handle 10 side and the engaging portion 21 on the rotating plate 20 side are different from each other. , Are engaged with each other to enable rotation of the rotary plate 20. Then, the rotation of the rotary plate 20 is
The stopper 30 provided on the tip 11 side of the handle 10
This is prevented by locking the locking portion 22 formed on the outer periphery of the rotary plate 20.

Further, the means adopted by the invention according to claim 2 follows the means of claim 1 as it is, and in particular, the fitting portion 23 of the rotary plate 20 is, as shown in each drawing, a rotary plate. It penetrates the front and back of 20 and is partially opened outward. That is, in the wrench 100 according to the second aspect of the present invention, the rotating body whose both ends are closed, such as the turnbuckle 220 and the rotating body, is inserted through the opening 23a into the fitting portion 23. It is a thing.

The means adopted by the invention according to claim 3 is that the above-mentioned stopper 30 is engaged with the engaging portion 22 on the rotating plate 20 side, and the tip portion 1 of the handle 10 is engaged.
A pair of left and right members each having a base end portion 32 rotatably supported on one side, and each stopper 30.
The tip portion 3 is interposed between the handle 30 and the handle 10 side.
A spring 33 for urging 1 to lock the locking portion 22 on the rotary plate 20 and a cam 34 for selectively pushing each stopper 30 to release the lock. Is. With this configuration, the wrench 1
In the case of No. 00, only rotation to one side of the rotary plate 20 is blocked, and fastening and the like of the rotated body can be performed with a simple configuration only by reciprocating operation of the handle 10.

[0015]

The operation of each invention constructed as described above will be described.
Each section will be explained separately.

(Regarding Wrench 100 of Claim 1) In this wrench 100, as shown in FIG. 1, the rotary plate 20 is projected from the tip portion 11 of the handle 10 by about 2/3. The fitting portion 23, which is provided substantially at the center of the rotating body, is completely exposed.
Moreover, since the rotary plate 20 is a literal plate-shaped member as shown in FIG. 6 or 8, for example, as shown in FIG. The nut 210 can be fitted into the fitting portion 23 by inserting the rotary plate 20.

As shown in FIG. 1 or 4, the rotary plate 20 has an engaging portion 21 formed on at least one surface thereof, and the engaging portion 21 of the handle 10 is provided. It engages with an engaging portion 13 provided on the tip 11 side. In the embodiment described below, the engaging portion 21 on the rotary plate 20 side is a circular groove, and the engaging portion 13 on the handle 10 side is a semi-circular ridge, but these are reversed. In other words, the rotary plate 20 can be moved to the front end portion 11 of the handle 10 by these engaging portions 13 and 21.
The rotary plate 20 can be rotated about the fitting portion 23 with respect to the distal end portion 11 of the handle 10 while being held with respect to. (In use, the handle 10 side is rotated with respect to the rotating plate 20 fixed to the rotated body by being fitted to the rotated body at the fitting portion 23.) Therefore, the rotating plate It is important that the engaging portion 21 on the 20 side and the engaging portion 13 on the handle 10 side are arc-shaped with the fitting portion 23 of the rotary plate 20 as the center.

The stopper 3 is important for rotating the rotary plate 20 fixed to the body to be rotated by the fitting portion 23 in a fixed direction by the reciprocating motion of the handle 10.
0. The stopper 30 selectively engages with each locking portion 22 formed on the outer periphery of the rotary plate 20, and various modes are conceivable, but in short, the handle 1
Anything that selectively frees or prevents rotation of the rotary plate 20 in a certain direction with respect to 0 may be used. That is, the stopper 30 blocks the rotation of the rotary plate 20 with respect to the handle 10 by locking the tip end 31 of the stopper 30 to the locking portion 22 formed on the outer periphery of the rotary plate 20 (in this case, the handle 10 Operation, substantial work such as fastening of the rotating body is performed), and the locking portion 22
The rotation of the rotary plate 20 with respect to the handle 10 is released by releasing the lock with respect to the handle 10 (in this case, the handle 10 is returned to the original position without applying a force to the rotated body).

The above description will be explained according to the mode of use of the wrench 100. The nut 21 which is a rotated body protruding into a narrow space as shown in FIG.
If you want to tighten or remove 0, use this wrench 1
The plate-shaped rotary plate 20 protruding at the end of the handle 10 of No. 00 is inserted into this narrow space. This insertion can be easily performed because the rotary plate 20 is a plate-like member that projects at the tip 11 of the handle 10. And the rotating plate 2
The nut 21 is fitted in the fitting portion 23 formed in the substantially central portion of
0 is fitted to select the locking direction of the stopper 30 with respect to the locking portion 22 of the rotary plate 20. Specifically, this selection is performed by operating the operation lever 37 exposed on the outer surface. Is.

After preparing in this way, each stopper 30
When the handle 10 is rotated in a direction in which the handle 10 is engaged with the locking portion 22 of the rotary plate 20, the rotational force from the handle 10 is transmitted to the nut 210 via the rotary plate 20, and the nut 21 is rotated.
0 fastening or removal is done. When the handle 10 is rotated by a predetermined angle, it can be held somewhere. At that time, the handle 10 is returned to its original position. At this time, since the tip of each stopper 30 rides over the locking portion 22 on the rotary plate 20 side, the return rotational force of the handle 10 is not transmitted to the rotary plate 20, that is, the nut 210 is not rotated. In other words, the handle 10 is the rotating plate 2
When the handle 10 is operated as described above, the nut 210 is further rotated. Of course, whether to tighten or remove the nut 210 can be selected only by changing the engagement state of each stopper 30.

In this wrench 100, the fitting portion 23 of the rotary plate 20 is used.
Has a opening 23a that penetrates to the front and back and partially opens to the outside. Therefore, as shown in (b) or (c) of FIG. The body of a certain turnbuckle 220 or reverse threaded pipe fitting 230 can be inserted. That is, the turnbuckle 220 or the reverse threaded pipe joint 230 is in a state where both ends thereof are closed by metal rods, pipes, etc. Although it cannot be fitted from the side, the turnbuckle 220 or the reverse threaded pipe joint 2 is formed by fitting the rotary plate 20 into the body of the rotary plate 20 through the opening 23a.
It is possible to fit the 30 into the fitting portion 23. After the fitting, the handle 10 turns the turnbuckle 220.
Alternatively, it is located in a direction orthogonal to the axial direction of the reverse threaded pipe joint 230, that is, in a direction in which the turnbuckle 220 or the reverse threaded pipe joint 230 can be rotated as a whole. Therefore, by operating the stoppers 30 as described above and reciprocally operating the handle 10, the turnbuckle 220 or the reverse threaded pipe joint 230 can be fastened or removed.

At this time, these turnbuckles 220
Alternatively, even if the reverse threaded pipe joint 230 is close to a wall, a floor surface, or the like, and the turning operation range of the handle 10 is limited, the handle 10 can be reciprocally moved in small steps. The tightening or removing operation of the turnbuckle 220 or the reverse threaded pipe joint 230 is easily performed.

When the opening 23a is formed in a part of the rotary plate 20, it is easy to doubt that the rotary plate 20 will come off the handle 10 due to the opening 23a. Absent. Because the rotating plate 20
Is engaged by the engagement of the engaging portion 21 formed on this with the engaging portion 13 on the handle 10 side,
This is because these engaging portions 13 and 23 are always engaged with each other somewhere other than the opening 23a.

(Regarding Wrench 100 of Claim 3) In this wrench 100, each stopper 30 has a more specific structure, and its switching operability is improved. That is, each stopper 30 is rotatably supported on the handle 10 side at its base end 32, and the spring 3 interposed between the stopper 30 and the handle 10 side.
3, each tip portion 31 is always urged to engage with the locking portion 22 on the rotary plate 20 side, and the shape of each tip portion 31 is the locking portion 22 on the rotary plate 20 side. According to the shape of. The stopper 30 is shown in FIG.
Like the pair on the upper side in the figure, the cams 34 are arranged so as to be divided into the left and right sides, so that one of the stoppers 30 is pressed to the side opposite to the rotary plate 20 by the rotation of the cam 34. , The other is the rotating plate 2 by the spring 33.
It is urged to the 0 side.

The above operation will be described with reference to the state shown in FIG. 4. In FIG. 4, a total of four stoppers 30 are adopted. The stopper 30 at the next stage in the drawing (second from the top) is pressed by the cam 34 in the direction away from the rotary plate 20, and directly engages with the rotation of the rotary plate 20. Not open. That is, in the state shown in FIG. 4, rotation of the rotary plate 20 in the counterclockwise direction in the figure is restricted by the stopper 30 at the uppermost stage, and rotation in the clockwise direction in the figure indicates the tip of the stopper 30. Since the portion 31 is pushed toward the spring 33 without engaging with the locking portion 22, it is free.

Next, in order to allow the rotation plate 20 to rotate in the counterclockwise direction in the drawing and to restrict the rotation in the clockwise direction, the cam 34 is rotated about the cam shaft 35. As a result, the stopper 30 at the uppermost stage is separated from the rotary plate 20, and the tip portion 3 of the stopper 30 positioned at the next stage is separated.
1 is in a state in which it can be engaged with the locking portion 22 of the rotary plate 20.

In the embodiment shown in FIG. 4, the cam 34
Two stoppers 30 are arranged on the left and right of each cam 34. This is because the stoppers 30 restrict the rotation of the rotary plate 20 by the two stoppers 30. is there. Each cam 34 is rotated integrally with the cam shaft 35.
Each cam shaft 35 is connected to one operating lever 3 via a link 36.
By connecting the operation lever 37 to the left and right, the rotation lever 20 is selected to which side the rotation plate 20 is restricted from rotating.

[0028]

EXAMPLES Next, the wrench 100 according to each claim will be described in detail in accordance with the examples shown in the drawings. Since the examples shown in the drawings include all of the inventions according to each claim, By describing the wrench 100 of this embodiment, all of the inventions of each claim will be described.

1 and 3 show a wrench 1 according to the present invention.
A top view and a bottom view of 00 are shown.
0 is the rotary plate 2 that is projected from the tip 11 of the handle 10.
0, and a fitting portion 23 is formed at the center of rotation of the rotary plate 20. As the fitting portion 23, when a rotating body that cannot be inserted from the end portion such as the turnbuckle 220 or the reverse threaded pipe joint 230 is targeted, as shown in FIGS. It may be carried out by providing an opening 23a penetrating both the front and back sides and opening to the outside, but when the nut 210 is the object to be rotated, it is fitted to the nut 210. It may be a simple recess that can be made.

As shown in FIG. 4, a storage recess 12 is formed in the tip portion 11 of the handle 10 of the wrench 100 and opens on the side opposite to the handle 10. A part of the rotary plate 20 and the stopper 30 are housed. A substantially semi-circular engagement portion 13 is formed on the inner surface of the storage recess 12, and a proximal end storage recess 12a for each stopper 30 described later is opened toward the inside of the storage recess 12. It is formed so as to do. The engaging portion 13 in the present embodiment is formed as an arcuate groove so that the engaging portion 21 on the rotary plate 20 side formed as a ridge is accommodated. 21 and 21 may be carried out by reversing the concavo-convex state.

Further, after the above-mentioned components are stored and assembled in the storage recess 12 formed in the tip portion 11 of the handle 10, the whole of the cover 4 as shown in FIG.
It is covered with 0, and in FIG. 1, the state covered with this cover 40 is shown. On the inner surface of the cover 40, an engaging portion 41 having substantially the same shape as the engaging portion 13 on the handle 10 side is formed. The engaging portion 41 engages with the engaging portion 21 of the rotary plate 20. Therefore, if the engaging portion 21 of the rotary plate 20 does not exist on the back side of the cover 40, it is unnecessary.

The rotary plate 20 is, as shown in FIG. 6 or FIG. 8, literally a plate-shaped one, and its outer shape is substantially circular as shown in FIG. And this rotating plate 20
A large number of locking portions 22 are formed on the outer peripheral surface of the stopper at equal intervals.
It is formed in a so-called chevron shape in order to easily and surely lock and the processing. That is, since the tip end portion 31 of each stopper 30 has a flat end face in the embodiment, the inclined faces are arranged in a mountain shape so that the end face can be easily engaged. is there. Therefore, the shape of each locking portion 22 is not limited to the mountain shape, and for example, each stopper 30
It may be a recess into which the tip of is inserted.

In the wrench 100 according to the embodiment, as shown in FIG. 4, a total of four stoppers 30 are used, and each stopper 30 is provided on the side of the tip portion 11 of the handle 10 described above. The base end portion 32 is inserted into the formed base end storage recess 12a and attached to the handle 10 side. In other words, the base end portion 32 of each stopper 30 is formed in a substantially circular shape, and by inserting this into the base end storage recess 12a from above, the stopper is rotatable with respect to the handle 10 side, and the drawing is omitted. 4 is assembled so that it does not come out in the lateral direction. Further, each stopper 30 is shown in FIG.
As shown in FIG. 7, the tip end 31 of the compression spring 33 is constantly urged toward the rotary plate 20 side by the compression spring 33 interposed between this and the handle 10. The end surface of each tip 31 is formed in a flat shape so that it can be engaged with the locking portion 22 described above.

The above stoppers 30 are set as two sets, but the cams 34 are arranged between the one set of stoppers 30, and each cam 34 is attached to the tip portion 11 of the handle 10 by the cam shaft 35. It is rotatably supported to the side. When each cam 34 is rotated by the rotation of the cam shaft 35 thereof, one of the stoppers 30 positioned on the left and right of the cam 34 is allowed to move toward the rotary plate 20 and the other stopper 30 is allowed. It is separated from the rotary plate 20, and in the present embodiment, each cam shaft 35 is integrally provided with a link 36 for operation. And each link 3
In the embodiment shown in FIG. 1, a T-shaped operation lever 37 is connected to the tip of 6 and both cams 34 can be simultaneously rotated by operating this operation lever 37. .

In the wrench 100 according to another embodiment shown in FIGS. 7 to 9, both ends of the second link 38 are rotatably connected to the respective links 36, and the second link 38 is formed. Is operated by an operation lever 37 rotatably supported by a shaft 39 on the tip end 11 side of the handle 10. As a result, the operating lever 37 is moved to the shaft
By swinging about 9, the state of both cams 34 can be changed simultaneously and in the same direction. In addition, in the other embodiments shown in FIGS. 7 to 9, members common to the embodiments shown in FIGS. 1 to 6 are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0036]

As described in detail above, in the invention according to claim 1, as described in the above embodiment, the "nut 2
10, a turnbuckle 220 or the like has a fitting portion 23 into which the rotated body is fitted from the outside in a substantially center in order to rotate and fasten or remove the rotated body, and a large number of locks are provided on the outer periphery. A disk-shaped rotating body 20 having a portion 22, a handle 10 rotatably holding the rotating body 20, and a handle 10
A wrench 100 provided with a stopper 30 provided at a tip portion 11 of the rotator 20 for selectively stopping rotation of the rotating body 20,
An arcuate shape that is longer than the opening width of the fitting portion 23 and is convex on the handle 10 side at the tip 11 of the handle 10.
Of forming the engagement portion 13, a substantially circular engaging portion 21 which engages with the engaging portion 13, and formed on at least one surface of the rotary plate 20, the rotating plate 2 0 engaging portion 21 handle by assembling the 10-side rotary plate 20 is engaged with the engaging portion 13 of the handle 10, the center of the rotary plate 20 is located outside of the distal end portion 11 of the handle 10, or one rotary plate 20 Of at least half of the surface of the handle is exposed from the tip of the handle 10. " A wrench that can fasten or remove a rotating body only by movement, and can also cause the rotating body to be engaged with the rotating body to project greatly to perform the fastening or the like in a narrow space. Can be provided with a simple configuration.

In the invention according to claim 2, the fitting portion 23 of the rotary plate 20 in the wrench 100 according to claim 1 is provided.
Is characterized in that "the fitting portion 23 penetrates through the front and back surfaces of the rotary plate 20 and has an opening 23a outward at a part thereof", thereby providing the above-mentioned effect. As a matter of course, the turnbuckle 2 whose both ends are not in a free state as the rotated body can be exhibited.
20 and the reverse threaded pipe joint 230 are also applicable, and these turnbuckles 220 and the reverse threaded pipe joint 23 are also applicable.
Wrench 10 that can be used to easily perform work such as zero tightening work
It can be zero.

Further, according to the wrench 100 of the third aspect, each stopper 30 is provided with the following description: "The stopper 30 has a distal end portion 31 that is locked to the locking portion 22 on the rotating plate 20 side and a distal end portion of the handle 10. 11 is a pair of left and right provided with a base end portion 32 rotatably supported on the 11 side, and is provided between the respective stoppers 30 and 30 and the handle 10 side so that the tip end portion 31 is provided. Is provided with a spring 33 for urging the locking portion 22 on the rotating plate 20 side to be locked, and a cam 34 for selectively pushing each stopper 30 to release the locking. " In addition to the above-mentioned effects, the wrench that can prevent the rotation of the rotary plate when necessary can be provided by the simple structure. Wrench 1 that can also be used 0 it is possible to provide a.

[Brief description of drawings]

FIG. 1 is a plan view of a wrench according to an exemplary embodiment of the present invention.

FIG. 2 is a view showing a state in which the wrench is used, and (a) is a partial sectional view of a nut as a target,
(B) is a partial perspective view for a turnbuckle, and (11) is a partial perspective view for a reverse threaded pipe joint.

FIG. 3 is a partial bottom view of the wrench.

FIG. 4 is a partial plan view of the wrench with a cover removed.

FIG. 5 is a plan view of a cover.

FIG. 6 is a cross-sectional view of the wrench viewed from the rotating plate side.

FIG. 7 is a plan view of a wrench according to another embodiment.

FIG. 8 is a side view of the same.

FIG. 9 is a partial plan view of the wrench with the cover removed.

FIG. 10 is a partially cutaway front view showing a conventional turnbuckle tightening lever.

FIG. 11 is a sectional view showing a conventional opening wrench with a ratchet.

[Explanation of symbols]

 100 Wrench 10 Handle 11 Tip part 12 Storage recess 13 Engagement part 20 Rotating plate 21 Engagement part 22 Locking part 23 Fitting part 23a Opening 30 Stopper 31 Tip part 32 Base end part 33 Spring 34 Cam 35 Cam shaft 36 Link 37 Operation Lever 40 Cover 41 Engagement Part 210 Nut 220 Turnbuckle 230 Reverse Thread Pipe Joint

Claims (3)

(57) [Claims] 1. A rotating member such as a nut or a turnbuckle is rotated to fasten or remove the rotating member. A disc-shaped rotating body having a large number of locking portions, a handle for rotatably holding the rotating body, and a stopper provided at the tip of the handle for selectively stopping rotation of the rotating body are provided. a wrench comprising, a tip portion of the handle is longer than the opening width of the fitting portion even without low, and the handle-side to form an arcuate engagement <br/> engaging portion that protrudes, this engagement a substantially circular engaging portion that engages the engagement portion, is formed on at least one surface of the rotating plate, engaging <br/> of the engagement portion of the rotary plate side engaging portion of the handle-side by assembling the rotary plate to handle by the outside of the front end portion of the center of the rotary plate a handle Position is either One wrench the even without least the surface of the rotating plate is more than half, characterized in that so as to expose the distal end of the handle. 2. The wrench according to claim 1, wherein the fitting portion penetrates the front and back surfaces of the rotary plate and is partially opened outward. 3. The pair of left and right stoppers, each of which includes a distal end portion that engages with an engaging portion on the rotating plate side and a base end portion that is rotatably supported on the distal end portion side of the handle. And a spring interposed between each stopper and the handle side for urging the respective tip portions to lock the rotation plate side locking portion, and each stopper selectively. The wrench according to claim 1 or 2, further comprising a cam that is pushed to release the lock.