JP2003170365A - Spanner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spanner with ratchet function capable of increasing a workability and reducing the limitation of work conditions. <P>SOLUTION: A plurality of latch rollers 13 with a tip part 6 formed in a fork shape are provided through a slide shaft 12 displaceably guided by a slit hole 11 at the tip part. The latch rollers are energized in the anti-working rotating direction by a spring 14. The latch rollers are formed so as to come into contact with the side of the anti-working rotating direction of a hexagonal part 3 to be rotated on one side of the crest part thereof when the slide shaft is positioned at one end of the slit hole in the anti-working rotating direction. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrench for attaching and detaching parts fixed by screws, such as bolts or screw-type connectors. 2. Description of the Related Art A screw is used as a safe and secure fixing means for connecting two parts or attaching the part itself to a structure. The screw converts the rotation into an axial displacement corresponding to the lead angle, and generates a strong surface pressure at the connecting portion. [0003] A wrench that performs the fixing work with the screw is a wrench, and a fastening part such as a bolt to be rotated has a hexagonal portion. The wrench is fitted into the hex portion, and the wrench is rotated. , The engagement work is achieved. FIGS. 3 and 4 show a normal spanner and a bolt and an engaging operation by the spanner and the bolt. The tip of the spanner 1 is a forked fork, and the distance between the facing surfaces of the fork pieces 2 and 2 is
Is approximately equal to the distance between the opposite sides. When the wrench 1 is inserted into the hexagonal portion 3, the rotation of the hexagonal portion 3 is restricted by the spanner 1, and the hexagonal portion 3 rotates integrally with the spanner 1. Generally, a structure is provided around the entire circumference of the hexagonal portion 3.
Or, it is rare that there is no obstacle such as a part, and the rotation of the wrench 1 is limited by the presence of the obstacle. Therefore, the spanner 1 is rotated within a predetermined rotation range, and the attachment / detachment component is attached / detached. Therefore, the spanner 1 is replaced with the hexagonal portion 3 at every predetermined rotation, and the workability is poor. FIG. 5 shows a spanner with a ratchet function. The tip 6 of the wrench body 5 has a ring shape, and a fitting ring 7 is rotatably provided at the tip 6, and ratchet teeth (not shown) are provided on the outer periphery of the fitting ring 7. Is formed, and a ratchet claw (not shown) is provided at the distal end portion 6. The engagement between the ratchet teeth and the ratchet pawl causes the fitting ring 7 to move toward the distal end portion 6.
Is rotatable in only one direction. The fitting ring 7 is provided with a fitting hole 8 for fitting with the hexagonal portion 3, and an inner peripheral surface of the fitting hole 8 is formed at an angle of 120 ° to fit with the top of the hexagonal portion 3. The groove having the apex angle is 3
They are formed at equal intervals in 0 ° steps. When rotating the hexagonal part 3, the fitting hole 8 of the fitting ring 7 is fitted to the tip part 6, and the spanner body 5 is rotated. The rotation restricting direction of the fitting ring 7 with respect to the distal end portion 6 is determined by the engagement between the ratchet teeth and the ratchet pawls of the spanner main body 5, and the spanner main body 5 is appropriately used depending on whether it is fixed or removed. Since the fitting ring 7 is restrained in only one direction with respect to the wrench main body 5, the wrench main body 5 can be reciprocated by the reciprocating rotation of the wrench main body 5 without replacing the wrench 1.
It is possible to fix and remove the fastening parts, and the workability is good. In the above-mentioned conventional wrench with a ratchet function, since the wrench is inserted into the hexagonal portion 3 from above, a space is required above the hexagonal portion 3. Space is needed. Further, since there is no break in the fitting hole 8, it cannot be used when the hexagonal portion 3 is provided in the middle of a bar or a cable. Therefore, the work situation in which the spanner with the ratchet function can be used has been limited. The present invention has been made in view of the above circumstances, and has as its object to provide a wrench with a ratchet function, which improves workability and has less restrictions on work conditions. According to the present invention, a plurality of latch rollers are provided at a front end portion of a fork-shaped fork, and a plurality of latch rollers are provided at the front end portion via a slide shaft which is guided by a slit hole and can be displaced. The latch roller is urged in a counter-working rotation direction by a spring. When the slide shaft is located at one end of the slit hole in the counter-working rotation direction, the latch roller rotates counter-working with the top of the rotated hexagon. The present invention relates to a wrench configured to be in contact with the direction side. Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the same components as those shown in FIGS. 3 and 5 are denoted by the same reference numerals. The tip 6 of the spanner body 5 has a bifurcated fork shape, the recess 10 formed in the tip 6 has a U-shape, the bottom surface is a cylindrical surface, and the radius of curvature of the cylindrical surface is hexagonal. 3 is slightly larger than the distance from the center to the vertex. Latch rollers 13a, 13b, 13c and 13d are arranged at the tip end 6 along the periphery of the recess 10. The mechanism for supporting the latch roller 13a will be described. The support mechanism for the latch rollers 13b, 13c and 13d is provided at an equal distance of 60 ° from the latch roller 13a and is the same mechanism. A slit hole 11 is formed substantially in parallel with the inner surface of the fork piece 2, and a slide shaft 12 is formed in the slit hole 11.
Are slidably fitted. The latch roller 13a is fixed to the slide shaft 12. A spring 14 is provided for urging the latch roller 13a in a counterclockwise direction (counterclockwise in the drawing) when viewed from the center of the recess 10. The spring 14 is bent in a V-shape as shown in FIG.
This is a leaf spring that comes into contact with. It is needless to say that a coil spring may be used. FIG. 1 shows a state in which the tip 6 is inserted into the hexagon 3 in order to rotate the hexagon 3 in a clockwise direction. Hexagonal portion 3 facing the inner surface of fork piece 2
The latch roller 13a comes into contact with a position clockwise deviated from the center of the plane 3a in a state where the plane 3a is parallel, and the slide shaft 12 is a counterclockwise end of the slit hole 11. The latch roller 13
Further movement of a in the counterclockwise direction is restricted. That is, one end of the slit hole 11 is shifted clockwise from a perpendicular passing through the center of the plane 3a, and further extends in a direction away from the perpendicular. The latch rollers 13a, 13
b, 13c, and 13d are in contact with a position shifted clockwise from the center of each flat surface 3a of the opposing hexagonal part 3, in other words, the top of the hexagonal part 3 is in contact with the opposite rotation direction. From the state shown in FIG. 1 to the state shown in FIG. 2A, the spanner 1 is rotated in the working rotation direction (clockwise in the figure). When the spanner 1 is to be rotated clockwise relative to the hexagonal portion 3, the top of the hexagonal portion 3 causes the latch rollers 13a, 13b, 13c and 13d to move counterclockwise and outward, respectively. It acts to displace it so that it spreads toward it. However, the latch roller 1
3a, 13b, 13c, and 13d are fixed to the slide shaft 12, and the slide shaft 12 is restrained by the slit hole 11 from being further displaced in the counterclockwise direction and the outward direction. 3 and the latch roller 1
No displacement occurs between 3a, 13b, 13c and 13d. That is, the hexagonal portion 3 rotates clockwise integrally with the spanner 1. The spanner 1 is rotated counterclockwise from the state shown in FIG. 2A (the state shown in FIG. 2B). When the spanner 1 is rotated counterclockwise,
The hexagon 3 rotates clockwise relative to the tip 6. When the hexagonal portion 3 is relatively rotated clockwise, the latch rollers 13a, 13b, 13c, 13d
Is displaced clockwise and outward by the top. The slit hole 11 extends clockwise, and furthermore, the slide shaft 12 moves clockwise along the slit hole 11 so that the slide shaft 12 moves from the center of the hexagonal portion 3 against the spring 14. Displaces away. Thus, the hexagonal portion 3 rotates clockwise relative to the tip portion 6, that is, the position of the hexagonal portion 3 does not change, and only the wrench 1 rotates counterclockwise. FIG. 2C shows a state in which the latch rollers 13a, 13b, 13c, and 13d are displaced to the maximum. When the spanner 1 is further rotated in the counterclockwise direction, the latch rollers 13a, 13b, 13c, and 13d are displaced.
13b, 13c and 13d cross over the top of the hexagonal portion 3 in a counterclockwise direction. At this point, the restraint on the latch rollers 13a, 13b, 13c, and 13d is released, so that the latch rollers 13a, 13b, 13c, and 13d are released.
As for d, the slide shaft 12 moves to the counterclockwise end of the slit hole 11 due to the repulsive force of the spring 14 (see FIG. 2D). Further, when the spanner 1 is rotated counterclockwise, the latch rollers 13a, 13b, 1
3c and 13d move while climbing over the top of the hexagonal portion 3, and the spanner 1 freely rotates counterclockwise. When the spanner 1 is rotated clockwise from a required state, the slide shaft 12 is
And the movement is restricted by the top of the hexagonal portion 3 (see FIG. 2 (E)). That is, when the wrench 1 is rotated clockwise in the state of FIG. 1, the hexagonal portion 3 can be rotated clockwise. By rotating the wrench 1 back and forth, the hexagonal portion 3 can be rotated clockwise, and there is no need to replace the wrench 1. When it is desired to rotate the hexagonal portion 3 in the counterclockwise direction, the wrench 1 is turned over, the tip 6 is inserted into the hexagonal portion 3, and the wrench 1 is reciprocated. In the above-described embodiment, the tip portion 6 has a forked fork shape, and is used by being inserted into the hexagonal portion 3 from the lateral direction, so that the hexagonal portion 3 is like a connector to which a cable is connected. Can be used, and the tip 6 has a shape in which the tip is cut off.
Can be used when there is no space all around. In the above embodiment, the latch roller 1
3 are provided so as to be in contact with the four surfaces of the hexagonal portion 3,
It is sufficient to restrict the rotation in the minimum plane, so that at least two rotations may be provided. As described above, according to the present invention, the tip portion has a forked fork shape, and a plurality of latch rollers are provided at the tip portion via a displaceable slide shaft guided by a slit hole. The latch roller is urged in a counter-working rotation direction by a spring, and the latch roller is configured such that when the slide shaft is at one end of the slit hole in the counter-working rotation direction,
The spanner is designed so that the top of the rotated hexagon is in contact with the opposite side of the work rotation direction, so the hexagon can be rotated only in the work direction by reciprocating the spanner, improving workability. In addition, the work can be performed if there is a space for reciprocating the wrench in a part of the hexagonal part, and an excellent effect that there is little restriction on the work situation is exhibited.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a main part plan view showing an embodiment of the present invention. FIGS. 2 (A), (B), (C), (D), and (E) are explanatory views of the operation of the embodiment of the present invention. FIG. 3 is a plan view of a main part of a conventional example. FIG. 4 is an operation explanatory view of the conventional example. FIG. 5 is a plan view of a main part of another conventional example. [Description of Signs] 1 spanner 2 fork piece 3 hexagonal portion 10 concave portion 11 slit hole 12 slide shaft 13 latch roller 14 spring

Claims (1)

Claims: 1. A tip portion has a bifurcated fork shape, and a plurality of latch rollers are provided at the tip portion via a displaceable slide shaft guided by a slit hole, and the latch roller is a spring. When the slide shaft is at one end of the slit hole in the anti-work rotation direction, the latch roller contacts the counter-work rotation direction across the top of the rotated hexagonal portion. A spanner characterized by having a similar configuration.