JP2572389Y2 - Ratchet 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 ratchet wrench, and more particularly, to a ratchet wrench in which a wrench body is made thinner so that it can be adapted to work in a narrow surrounding environment, and a handle angle can be changed and shortened.

[0002]

2. Description of the Related Art Conventionally, a ratchet wrench used for car maintenance and other work is shown in FIGS. 5 to 6 (FIG. 5 is a plan view of a main part of a ratchet mechanism in which the vicinity thereof is cut away.
FIG. 6 is a front view of the same part of the conventional example of FIG. ). This is because the handle 35 is attached to the wrench body 30 at an angle, and the wrench socket 31 (hereinafter referred to as a socket) can be rotated leftward or rightward with a direction. Is going. The ball 33 fitted and pressed into the depression of the claw 32 is a coil spring 34
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7 to 9 (FIG. 7 is a plan view omitting a central portion. FIG. 8 is a front view of the vicinity of a ratchet body of the conventional example in FIG. 7. FIG. A- of FIG.
It is sectional drawing cut | disconnected in A. ). Although the rotation of the socket 41 is only in one direction, the attachment angle of the handle 51 with respect to the wrench body 40 can be arbitrarily changed. The ratchet teeth feeding pawl 42 of this embodiment is held obliquely with respect to the socket 41 as shown in FIG.

[0004]

[Problems to be Solved by the Invention] In recent years, the working environment in which such tools are used has become increasingly severe. For example, even in the case of car maintenance, the density of the equipped equipment tends to be high, and narrow and complicated places are required. In many cases, it is necessary to insert the tip of a tool into the work. Accordingly, tools to be handled are required to be thin, small, and easy to use. However, the conventional ratchet wrench has not yet been sufficiently improved to meet such requirements.

[0005] For example, the conventional example shown in FIGS.
Each of the conventional examples uses a rod having a circular cross section for the pawl of the ratchet mechanism. However, there is a size of the diameter required to give sufficient strength to the claw part, and furthermore, the thickness of the wrench body is less than a certain value because the supporting part for supporting the claw has a necessary thickness. Can not be.

In the conventional example shown in FIGS. 5 and 6, the handle is inclined with respect to the wrench body, but since it is fixed, it cannot be changed to an arbitrary angle depending on the application. If you try to change the angle of the handle, the ratchet mechanism limits the rotation of the socket to one direction, or springs the ball into a recess in a part of the pawl to release this action. There is a structure that presses and energizes, and it is difficult to realize it as it is.

In the conventional example shown in FIGS. 7 to 9, the angle of attachment of the handle to the wrench main body can be changed.
There is a problem that the rotation of the socket cannot be released and the ratchet driving operation is inferior to those in FIGS. In addition, since the claw 42, the coil spring 43, and the stopper 44 at one end of the coil spring 43 must be arranged in a straight line, there is a disadvantage that the length of the wrench body 40 in the longitudinal direction is inevitably increased. The purpose of the present invention is to accommodate a wrench socket and a nail
Latch that can make the wrench body thinner than before
To provide an edge wrench. Still others of the present invention
The purpose of the wrench body is to accommodate the wrench socket and nail
Mechanism that allows the coupling angle to be freely changed with respect to the handle
The length of the wrench body is shorter than before
To provide a ratchet wrench that can be
is there.

[0008]

In order to achieve the above object, the ratchet wrench of the present invention comprises a wrench body and a handle.
Has an angle, or its bond angle can be changed freely
Ratchetles that are connected via a hinge structure
A socket 1 provided with ratchet teeth 2 on the periphery thereof; and a claw 5 for engaging the ratchet teeth 2 with the support portion 4 for rotatably supporting the socket 1 so as to provide directionality to the rotation of the socket 1. In the wrench, a hole formed in the support portion 4 of the socket and a cross section perpendicular to the moving direction of the claw 5 fitted in the hole has a shape having at least opposite sides parallel to the rotation surface of the socket 1. And
In addition, the ratchet wrench of the present invention penetrates a socket 1 provided with ratchet teeth 2 in a peripheral portion and a supporting portion 4 which rotatably supports the socket 1 and meshes with the ratchet teeth 2 to have directionality in rotation of the socket 1. In the wrench provided with a claw 5 for engaging the handle, the handle 21 is connected to the wrench body 10 via a hinge structure 20 so that the connection angle thereof can be freely changed, and is fitted into the recess 8 provided in the claw 5. The position of one end of the coil spring 12 that urges the ball 11 to press the ball 5 against the claw 5 for restricting the operation of giving directionality is changed to the outer peripheral surface of the bush 14 in which the screw 15 of the hinge structure 20 is threaded to be internally threaded. Fix with.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway plan view showing only a main part of an embodiment of the present invention. FIG. 2 is a front view of the embodiment shown in FIG. FIG. 3 is a plan view showing the overall appearance of the embodiment of FIG. 1 to 3, 1 is a socket, 2 is a ratchet tooth provided on the outer periphery of the socket 1, 3 is an uneven surface adapted to a nut or bolt head to be turned by the wrench provided on the inside of the socket 1, 4 is A wrench body 10 comprising a socket 1 and its support 4 (including a ratchet mechanism), 5 a ratchet pawl, 6 a ratchet pawl 5 engaging part with a ratchet tooth 2, 7
Is a mating escape portion provided on the ratchet pawl 5 for free rotation of the socket 1; 8 is a recess for receiving the ball 11 provided on the ratchet pawl 5;
13 is a hole provided in the support portion 4 of the socket into which the coil spring 12 is inserted, 14 is a bush internally threaded, 15 is a bolt whose tip is screwed into a female thread of the bush 14, 20 is a hinge mechanism connected by the bush 14 and the bolt 15;
Reference numeral 21 denotes a handle for supporting the wrench main body 10 at an arbitrary mounting angle, and reference numeral 22 denotes a spanner provided on the opposite side of the handle 21 from the wrench main body 10.

One of the features of the embodiment of the present invention is that, as shown in FIG. 2, the main cross section perpendicular to the longitudinal direction of the ratchet pawl is not circular as in the prior art, but the upper and lower portions parallel to the rotating surface of the socket. It has a shape with opposite sides. Therefore, the shape of this cross section may be rectangular as shown in FIG. 2, a square as shown in FIG. 4 (a shape in the drawing), or a horizontally long D-shaped (b shape in the drawing). It may be.
Various other forms are conceivable, but any of them may be used. By doing so, the thickness of the wrench body can be made smaller than before without reducing the strength and durability of the wrench. Therefore, the operability in a narrow place is improved. FIG. 4C is an explanatory view showing the cross section of the ratchet claw of the present embodiment and the cross section of the conventional example in an overlapping manner. In the figure, D ₂ is a cross-section of a conventional round nail, D ₁ is a cross section of the nail of the preferred embodiment of the present invention. l ₁ is the thickness of the claw of the present invention (equal to the required fitting length of the socket with the ratchet teeth), which is much smaller than the thickness l ₂ of the conventional round claw.

The reason for this is that almost all the stress applied to the nail is received from the ratchet teeth, the direction is horizontal, and the stress received from the top and bottom is small, so that the upper and lower sections may be thinner than the left and right sections. Conventionally, round bars that were easy to process were used,
In the present invention, the thickness of the wrench body is reduced by forming the upper and lower flat squares or similar shapes. The method of thinning the wrench body in this way is not limited to the method shown in FIGS. 1 to 3 in which the handle is connected to the wrench body by a hinge structure, but also the handle shown in FIGS. The same effect can be expected.

Another feature of the embodiment of the present invention is shown in FIG.
As shown in FIG. 2, in order to urge the ball 11 in the ratchet mechanism, the ball 11 of the coil spring 12
It is necessary to fix the opposite end of the bush 14, but this fixing is performed on the outer peripheral side surface of the bush 14. With such a structure, the socket 1 and the hinge mechanism 2
The distance to zero can be reduced. Therefore, the tool body is shortened, and the usability is improved. The ball 11 is fitted into a recess 8 provided on the surface on the opposite side of the meshing portion 6 meshing with the teeth 2 of the claw 5 for giving direction to the movement of the claw 5. The ball 11 and the coil spring 12 are assembled by inserting the ball 11 into the hole 13 provided in the wrench body 10.
And the bush 1 after inserting the coil spring 12
4 may be pushed into the wrench body 10 and screwed with the bolt 15.

In this embodiment, the angle at which the handle is attached can be changed arbitrarily. Therefore, when it is necessary to rotate the socket 1 in the opposite direction, the operation can be performed by turning the ratchet wrench upside down. Further, as shown in FIG. 3, in this embodiment, the wrench 22 is provided at the other end of the handle. However, it is not necessary to attach anything with the handle alone, attach a wrench of another size, or use another hand. Tool heads may be provided, and these combinations are free.

[0014]

As described above, according to the present invention, the wrench body can be made thin by forming the cross section of the pawl for driving the ratchet of the ratchet wrench to have the opposite side parallel to the rotating surface of the socket. This has the effect. Further, in the swing type ratchet wrench, one end of a coil spring for urging a ball fitted into a recess provided in the pawl for regulating the operation of the pawl of the ratchet mechanism is fixed to the wrench body and the handle. Since the size of the wrench body is reduced by performing the operation on the outer peripheral surface of the bush of the hinge mechanism, there is an effect that the distance between the rotation axis of the socket of the ratchet wrench and the hinge is reduced.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of an essential part of an embodiment according to the present invention.

FIG. 2 is a front view showing a main part of the embodiment of FIG. 1 with a part cut away.

FIG. 3 is a plan view showing the entire appearance of the embodiment of FIG. 1;

FIG. 4 is an explanatory view showing an example of a cross-sectional shape of the ratchet claw according to the embodiment of the present invention and a comparison with a conventional example.

FIG. 5 is a plan view showing a main part of a ratchet wrench of a conventional example, partially cut away.

FIG. 6 is a front view showing a part of a conventional ratchet wrench, partially cut away.

FIG. 7 is a plan view omitting a central portion of another conventional ratchet wrench.

FIG. 8 is a front view showing a main part of another conventional ratchet wrench.

FIG. 9 is a cross-sectional view of a main part of a conventional example cut along AA in FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wrench socket 2 Ratchet tooth 4 Socket supporting part 5 Claw 10 Wrench main body 11 Ball 12 Coil spring 14 Bush 15 Bolt 20 Hinge mechanism 21 Handle 22 Spanner part

Claims (2)

(57) [Scope of request for utility model registration] The wrench body and handle have an angle.
Or a hinge structure so that the coupling angle can be changed freely
And a wrench socket provided with ratchet teeth on a peripheral portion thereof, and a supporting portion rotatably supporting the wrench socket. In a wrench provided with a claw for making a hole, a hole opened in a support portion of the wrench socket, and a cross section perpendicular to a moving direction of the claw fitted into the hole,
A ratchet wrench having at least a side parallel to a rotation surface of the wrench socket. 2. A wrench socket having ratchet teeth provided on a peripheral portion thereof, and a claw for penetrating a support portion rotatably supporting the wrench socket and meshing with the ratchet teeth to provide directionality to rotation of the wrench socket. In the wrench provided, a grip handle is coupled to the main body of the wrench via a hinge structure so that a coupling angle thereof can be freely changed, and regulates an operation of having the direction fitting into a recess provided in the claw. A ratchet wrench characterized in that a position of one end of a coil spring for urging a ball for pressing against a claw is fixed by an outer peripheral surface of a female threaded bush for stopping a screw of the hinge structure.