JP2000079568A - Hexagonal bar torque wrench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain ensuring of a holding condition of a hexagonal bar torque wrench and a cap screw. SOLUTION: A spring supporting hole 2 is provided to be pierced on a side close to a tip end of a hexagonal bar torque wrench main unit, a C-shaped spring 35 is inserted in the supporting hole 2, and cap screw side holding parts 43, 44 provided in a position distant from an opening part 35a of the spring 35 are elastically mounted so as to jump out a little from the supporting hole 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual tool torque wrench (hereinafter, simply referred to as "wrench" unless otherwise specified). The present invention relates to tools such as a so-called hexagon stick torque wrench, hexagon stick bit, T-shaped handle hexagon stick spanner, and hexagon stick driver.

[0002]

2. Description of the Related Art There are many prior arts related to this kind of hexagonal rod torque wrench, but the invention described in Japanese Utility Model Laid-Open No. 62-1874 is known as the prior art of the present invention. This conventional example is a hexagonal wrench whose wrench body has a hexagonal cross section, and has a slit-like shape that supports a spring in the axial direction from an end surface of the wrench body in a direction perpendicular to the axis of the wrench body toward the other side. A supporting hole is provided near the tip of the wrench body, and a holding hole for a circular spring is provided on the other side of the center of the supporting hole, while a pair of obtuse portions are provided adjacent to the opening on one side. A spring having a substantially elliptical holding part is provided on the other side opposite to the opening, and the holding part of the spring is inserted into the spring holding hole of the wrench body and the adhesive is provided. The spring is mounted so that the pair of obtuse portions of the spring are slightly protruded from the slit-like supporting holes.

Therefore, since the conventional example has the above-described configuration, when a wrench is inserted into a hexagonal hole of a screw, the spring is compressed inward, so that the wrench is easily inserted into the hexagonal hole.

Further, after the wrench is inserted into the hexagonal hole, the spring always restores and tries to extend. Therefore, the spring is pressed against the wall surface forming the hexagonal hole, so that the holding state of the screw and the wrench is relatively stable. Is held.

[0005] When the wrench is removed from the hexagonal hole, the spring is compressed by receiving the wrench drawing stress, so that it is expected that the wrench can be easily removed from the hexagonal hole, which can be evaluated in terms of points.

On the other hand, since the slit-shaped supporting hole for supporting the spring has an open end surface in a direction perpendicular to the axis of the wrench body, the end of the spring mounted on the supporting hole on the opening side is open. Is in a free state.

Therefore, when the wrench is inserted into the hexagonal hole, it is impossible to avoid the possibility that the opening side of the wrench main body extends in the axial direction of the wrench main body. There is a risk of compression toward.

As a result, the obtuse angle side of the spring may release the contact state with the wall surface of the hexagonal hole.
Lack of certainty in holding the wrench body and screws.

In addition, as described above, in the conventional example, since the slit-shaped support holes for supporting the spring in the axial direction are provided near the tip of the wrench body, they are located on both sides of the slit-shaped support holes. The wrench body may be bent toward the support hole side, so that the torque may decrease due to rotation during use.

Further, since the other side of the spring has a substantially elliptical holding portion inserted into the holding hole for the spring and is held via an adhesive, the holding is performed in a relatively short time due to the deterioration of the adhesive. There is a possibility that the wrench may be damaged, and it is necessary to provide a holding hole in the wrench main body. Therefore, it cannot be denied that the holding operation is complicated, and the structure is complicated.

[0011]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to assure the holding state between a hexagonal rod torque wrench and a hexagonal hole such as a cap screw. It is in. Another object of the present invention is to make it easier to insert a wrench body into a hexagonal hole such as a cap screw. Still another object is to further simplify the structure as compared with the conventional example, and to ensure the holding state between the hexagonal rod torque wrench and a hexagonal hole such as a cap screw.

[0012]

In order to achieve the above object, the present invention provides a hexagonal rod torque wrench according to the first aspect of the present invention, wherein a torque wrench main body has a hexagonal cross section. A spring supporting hole is provided in the direction perpendicular to the axis of the wrench wrench near the tip of the torque wrench main body. On the other hand, a substantially C-shaped spring has a spring main body opening opposite to the opening thereof. Adjacent portions on both sides of the portion, a cap screw side contact portion is provided at the boundary between the spring main portion and the adjacent portions on both sides, and at least one of the cap screw side contact portions among these cap screw side contact portions is provided. It is characterized in that the torque wrench is elastically mounted in the spring support hole so as to slightly protrude from the spring support hole.

In this specification, the cap screw side contact portion is a portion of a spring that is in contact with a wall surface of a hexagonal hole when a spring supported by a spring supporting hole is inserted into a hexagonal hole of a cap screw, screws, or a hexagonal bolt. It is a part, and a form other than an arc shape is also suitable.

According to a second aspect of the present invention, there is provided a hexagonal rod torque wrench having a hexagonal cross section whose torque wrench main body has a hexagonal cross section, wherein a spring supporting hole is provided at right angles to a shaft center of the torque wrench main body. The torque wrench body is provided near the tip of the body, and
A spring-shaped spring, the main part of the spring on the opposite side of the opening, the adjacent part on both sides of the opening, the cap screw side contact part is provided at the boundary between the main part of the spring and the adjacent parts on both sides, respectively. Each of these cap screw side contact portions is elastically mounted on a spring support hole so as to slightly protrude from the support hole of the torque wrench body.

In this specification, adjacent portions on both sides of the opening of the spring are portions of the entire spring supported by the spring supporting hole that are in contact with the spring supporting hole, and have a circular arc shape. Including

According to a third aspect of the present invention, there is provided a hexagonal rod torque wrench according to the first or second aspect, wherein the wall surface on which the spring support hole is formed is near the tip of the torque wrench body and inward from the tip. A groove is provided in at least any one of the above-mentioned wall surfaces located in a direction perpendicular to the axis of the torque wrench main body, and a substantially C-shaped spring has a spring main body portion and an adjacent portion on both sides of the opening. Any one of them is supported by the groove.

According to a fourth aspect of the invention, there is provided a hexagonal rod torque wrench according to the first, second, or third aspect, wherein a tip portion of the torque wrench body provided with a spring supporting hole has a substantially hexagonal cross section. It is characterized by being substantially spherical.

According to a fifth aspect of the present invention, there is provided a hexagonal rod torque wrench having a hexagonal cross-section, wherein the torque wrench body has a hexagonal cross section. The slit is provided in the axial direction and on the other side, and the torque wrench body located on at least one side of the slit is extended outward with reference to the other end of the slit. Things.

[0019]

Embodiments of the present invention will be described below. Embodiment 1 Embodiment 1 will be described with reference to FIGS. The body 34a of the hexagonal rod torque wrench 34 has a hexagonal cross section, as is known. In this embodiment, the tip 37 of the wrench body 34a is hexagonal, but as is apparent with reference to FIG. 3, the tip 37 of the wrench body 34a is inserted into the hexagonal hole of the cap screw 5 in any direction during use. The hexagonal rod torque wrench 34 is formed in a substantially spherical shape so that the hexagonal rod torque wrench 34 can be rotated in any direction. However, it is not essential that the present invention be formed in a substantially spherical shape.

In order to support a spring 35, which will be described later, near the tip of the wrench body 34a, a spring support hole 2 is formed in the tip portion 37 of the wrench body 34a in a direction perpendicular to the axis 42 of the wrench body 34a. Tip 3
7 is provided. In the embodiment of the present invention, the spring supporting hole 2 is provided so as to penetrate the wrench body 34a. However, the inventor also plans to close one of the spring supporting holes 2 without necessarily penetrating it. (See FIG. 8 and the like).

On the other hand, the spring 35 inserted into the above-mentioned spring supporting hole 2 has a substantially C-shape, and a spring main body 38 is provided on the opposite side of the opening 35a, on both sides of the opening 35a. When the wrench 34 is inserted into the hexagonal hole of the cap screw 5 at the boundary between the spring main portion 38 and the adjacent portions 39, 40, the adjacent portions 39, 40 contact the inner surface of the hole. , 44 are provided.

The cap screw side contact portions 43 and 44 on both sides of the substantially C-shaped spring 35 are elastically mounted in the spring support hole 2 so as to slightly protrude from the spring support hole 2.

In this case, the cap screw side contact portions 43 and 44 on both sides are preferably mounted on the spring support hole 2 so as to slightly protrude from the spring support hole 2. 43,
It is also planned that only one of the cap screw-side contact portions 44 is elastically mounted in the spring support hole 2 so as to slightly protrude from the spring support hole 2.

A pair of grooves 21 is provided on the wall surface 2a forming the spring support hole 2 in a direction perpendicular to the axis 42 of the torque wrench body 34a.

When the substantially C-shaped spring 35 is elastically mounted in the spring support hole 2, the substantially C-shaped spring 35 is so mounted that the substantially C-shaped spring 35 is surely elastically mounted in the spring support hole 2. The spring main body 38 located on the side opposite to the opening 35 a of the 35 is supported by the groove 21 on one side, and the adjacent parts 39 and 40 are supported by the groove 21 on the other side.

However, in this embodiment, the grooves 21 are provided on both sides, and the adjacent portions 39 and 40 on both sides and the opening 3 are provided.
Each of the spring main portions 38 opposed to the groove 5a is
However, the inventor plans to omit one of the grooves 21 on both sides, and to support either of the adjacent portions 39 and 40 and the spring main portion 38 on the both sides. are doing.

Therefore, as is apparent with reference to FIG. 3, when the wrench 34 of this embodiment is inserted into the hexagonal hole of the cap screw 5, when the tip of the wrench body 34a is spherical, the cap screw 5 Even if the axis 41 of the wrench 34 and the axis 42 of the wrench 34 are at different angles, they can be inserted or rotated.

When the tip of the hexagonal rod torque wrench 34 on which the spring 35 is mounted is inserted into the hexagonal hole of the screw or the cap screw 5 at the time of use, the spring 35 slightly protruding can be moved in the axial direction of the wrench. And is compressed only in the right angle direction (see arrows QQ in FIG. 2).
Since the cap screw side contact portions 43 and 44 on both sides are securely pressed against the screws and the wall surface forming the hexagonal hole of the cap screw 5, the hexagonal rod torque wrench 34 and the hexagonal hole are held. The state can be assured.

The spring support hole 2 is provided in the wrench body 34a in a direction perpendicular to the axis and near the tip of the wrench body 34a, and a slit-like support hole is provided as in the prior art. Since one end of the wrench body is not open, the wrench body 34a does not bend inward when the wrench body 34a is held in the hexagonal hole, so that the torque may decrease due to rotation as in the above-described conventional example. Absent.

Further, the hexagonal rod torque wrench 3 of the present invention
4 is obtained by providing a spring supporting hole 2 in the wrench body 34a and by mounting a substantially C-shaped spring 35 in the supporting hole 2, the configuration is compared with a conventional hexagonal rod torque wrench. Simple but easy to process.

Further, this hexagonal rod torque wrench 34
The torque wrench main body 34a is formed on the wall surface forming the spring supporting hole 2 near the tip of the torque wrench main body 34a and on the wall located inside from the vicinity of the tip.
A pair of grooves 21, 21 are provided in a direction perpendicular to the axis 42 of the spring 35, and the opening 3 of the substantially C-shaped spring 35.
The adjacent portions 39 and 40 on both sides of 5a are supported by the groove 21 on one side, and the spring main body 38 facing the opening 35a of the spring 35 is supported by the groove 21 on the other side.
Spring main body 38 and opening 35a of spring 35
The surface connecting the adjacent parts on both sides of the wrench is always set in a direction perpendicular to the axis 42 direction of the wrench body 34a. Therefore, when the wrench 34 is inserted into the hexagonal hole, the spring 35 is easily compressed in a direction perpendicular to the direction of the axis 42 of the torque wrench body 34a, so that the spring 35 can be inserted smoothly (arrow P in FIG. 2). -P).

Although not shown in the figure instead of providing the groove 21, the spring support hole having a circular cross section may have a substantially elliptical cross section. In this case, the spring 35 is elastically mounted in the substantially elliptical spring support hole, so that the spring main portion and the adjacent portions on both sides of the opening are bent by the pulling extension action in the spring support hole having a circular cross section. As a result, the same function as in the case where the groove is provided can be expected.

Further, although not shown, a spring support hole having a square or rhombic cross section is provided so that the spring main body and the adjacent portions on both sides of the opening are supported inside the corner. By doing so, the same function as in the case of the above-described groove can be expected.

The second embodiment will be described with reference to FIGS. In this embodiment, there is little difference in the essence of the configuration from the first embodiment. Therefore, the difference will be particularly described, and the description of the first embodiment will be basically applied to the common configuration and the operation and effect, and the description will be omitted. I do. Also in the following third to tenth embodiments, common points are similarly used, and different points are basically mentioned.

In the first embodiment, a hexagonal spherical portion is provided near the tip of the wrench body 1a, but this embodiment is basically different in that there is no equivalent to the spherical portion. However, similar to the first embodiment, the spring supporting hole 2 is provided to penetrate near the tip of the wrench main body 1a.

On the other hand, the basic configuration of the substantially C-shaped spring 4 is not largely different from that of the first embodiment, and the spring main body 38 is provided on the side opposite to the opening 4a.
When the wrench 1 is inserted into the hexagonal hole of the cap screw 5 at the boundary between the spring main part 38 and the adjacent parts 6, 6a, the adjacent portions 6, 6a contact the inner surface of the hole. Parts 8 and 9 are provided. A substantially C-shaped spring 4 is inserted into the spring support hole 2, and the cap screw side contact portions 8 and 9 on both sides of the spring 4 are supported so as to slightly protrude from the spring support hole 2.

In this embodiment, another spring support hole 3 is provided in a direction perpendicular to the above-mentioned spring support hole 2 from one end surface perpendicular to the longitudinal direction of the wrench body 1a.

On the other hand, the opposite side of the opening 4a of the spring 4 is projected outward and provided with a wrench-side holding portion 7. The wrench-side holding portion 7 is perpendicular to the above-mentioned spring supporting hole 2. At the other support hole 3 provided for the spring. The holding portions 17 and 17a having the same function as the spring main portion 38 of the first embodiment are provided on both sides adjacent to the wrench-side holding portion 7.

The wrench-side holding portion 7 of the spring 4 faces the spring support hole 3 provided in the axial direction of the wrench 1a. Also in this embodiment, since the spring 4 can be positioned so as to be parallel to the axis of the wrench body 1a, in the first embodiment, the adjacent portions 39 and 40 on both sides are When the wrench 1 is inserted into the hexagonal hole in the same manner as in the case where the spring main body 38 is supported in the groove 21 on the other side, the spring 4 moves with respect to the circumferential direction and the axis of the support hole 2 for spring. Care is taken not to turn at right angles.

The third embodiment will be described with reference to FIGS. Wrench body 1a
The spring support hole 13 is located near the tip of the wrench body 1a.
Are provided as bottomed so-called blind holes without penetrating through.

In this embodiment, another spring support hole 14 is provided at right angles to the above-described spring support hole 13 from one end surface in a direction perpendicular to the longitudinal direction of the wrench body 1a similarly to the second embodiment. Have been.

The height of the spring 10 is lower than that shown in the first and second embodiments (slightly higher than the height of the illustrated spring support hole 13) and has a substantially C-shape. Although the opening 10a
One of the cap screw side contact portions 15 adjacent to and separated from the opening is formed in an arc shape, and the other wrench side holding portion 16 is provided in a straight line close to the opening 10a.

An adjacent portion 11 is provided adjacent to the opening portion 10a and on the side of the arc-shaped cap screw side contact portion 15 outside the opening portion 10a.

A wrench-side holding portion 12 protruding outward is provided on the opposite side of the opening 1a, that is, on the side of the wrench-side holding portion 16 provided in a straight line. A wrench-side holding unit 18 is provided between the wrench 15 and the wrench-side holding unit 12.

The cap screw side contact portion 15 adjacent to the spring support hole 13 of the wrench body 1a and separated from the opening 10a provided in the spring 10 is supported so as to protrude from the support hole 13, and the other linear shape is formed. The wrench side holding portion 16 is in contact with the wall surface of the spring support hole 14.

The wrench side holding portion 12 protruding outward faces another spring support hole 14 provided in a direction perpendicular to the spring support hole 13. Further, the wrench side holding buttons 11 and 18 are in contact with the wall surfaces of the support holes 13, respectively.

The wrench side holding portion 12 of the spring 10
Since the wrench 1a faces the spring holding hole 14 provided in the axial direction of the wrench 1a, in this embodiment, in addition to the advantages obtained by the first embodiment, the spring 10 is connected to the axial center of the wrench body 1a. In the first embodiment, the wrench-side holding portions 39 and 40 on both sides can be positioned in the parallel direction.
When the wrench 1 is inserted into the hexagonal hole in the same manner as when the wrench-side holding portion 38 facing the opening 35a of the spring 35 is supported in the groove 21 on the other side, the spring 10 is inserted smoothly. Easy advantages are obtained.

Further, since the wrench side holding portion 12 faces another spring support hole 14, the spring 10
There is also an advantage of having a function of preventing rotation of the motor.

At this time, the wrench-side holding portions 11 and 18 of the spring 10 are in contact with the wall surface forming the spring support hole 13, and the wrench-side holding portion 16 is in contact with the wall surface of another spring support hole 14. Accordingly, the deflection of the spring 10 can be controlled in a direction perpendicular to the axis of the wrench body 1a. Reference numeral 19 denotes a cap screw side contact portion 1.
5 is a hexagonal hole of the cap screw on the opposite side. The wrench body 1a is pressed by the spring 10 and comes into close contact with the inner wall 19 of the cap screw, so that the parallelism between the axis of the cap screw 5 and the axis of the wrench body 1a is improved.

The fourth embodiment will be described with reference to FIGS. In this embodiment, as in the third embodiment, a spring support hole 20 which is a so-called blind hole with a bottom is provided in a direction perpendicular to the axis of the wrench main body 1a, and from the opening edge of the spring support hole 20 to the bottom surface. A pair of grooves 21, 21 are provided in the direction perpendicular to the axis of the torque wrench main body 1 a halfway toward the center.

One cap screw side contact portion 27 of the substantially C-shaped spring 22 is supported so as to slightly protrude from the spring support hole 20, and the other wrench side holding portion 28 is provided with a spring support hole. 20 supported on the bottom surface.

One of the adjacent portions 23, 25 on both sides of the opening 22 a of the spring 22 is connected to the wrench body 1.
The supporting portion 25 is supported by a groove 21 provided in a direction perpendicular to the axis of a, and the other adjacent portion 25 is supported by a wall surface 23 a on the bottom surface side of the spring support hole 20.

On the other hand, of the two wrench-side holding portions 24 and 26 provided on the side opposite to the opening 22a of the spring 22 (up and down in the drawing), the wrench-side holding of the spring support hole 20 near the opening edge is provided. The portion 24 is supported by the other groove 21, and the wrench holding portion 26 on the bottom surface side of the spring support hole 20 is supported by the wall surface 23 a of the spring support hole 20.

Thus, the same advantage as in the first embodiment can be obtained by the wrench 1 of this embodiment. Reference numeral 29 denotes a hexagonal hole of the cap screw on the side opposite to the cap screw side contact portion 27. The wrench body 1a is pushed by the spring 22 and the inner wall 29 of the cap screw 5 is pressed.
And adhere. Therefore, the parallelism between the axis of the cap screw 5 and the axis of the wrench body 1a is improved.

The fifth embodiment will be described with reference to FIGS. The spring support hole 20 is provided in the direction perpendicular to the axis of the wrench body 1a by the so-called blind hole having the bottom as described above. Is provided with a groove 52 having a triangular cross section.

On the other hand, the spring 35 has a substantially C-shape, and has a cap screw side contact portion 55 adjacent to the opening 35a on one side and a triangular cross section provided on the bottom of the spring support hole 20 on the other side. A wrench-side holding portion 53 supported by the groove 52 is provided. Furthermore, spring 3
Adjacent portions 56 and 25 curved in an arc shape are provided on both sides of the opening 35a of the fifth 5, and a substantially linear spring main portion 26 is provided on the opposite side of the opening 35a.

The cap screw side contact portion 55 is supported by the spring support hole 20 of the wrench main body 1a so as to slightly protrude from the support hole 20, and the wrench side holding portion 53 is provided at the bottom of the spring support hole 20 by a wrench. A groove 52 having a triangular cross section provided in parallel with the axial direction of the main body 1a.
The adjacent portions 56 and 25 curved in an arc shape are supported on the side surface of the support hole 20 on both sides of the opening 35a of the spring 35, and are linearly provided on the opposite side of the opening 35a. The spring main body 26 is supported by the wall surface of the support hole 20.

Although the illustrated example of the groove 52 has a triangular cross section, the cross sectional form is not limited.

Thus, the present embodiment basically provides the same advantages as the first embodiment.

The sixth embodiment will be described with reference to FIGS. The wrench body 34a of this embodiment is not different from that of the first embodiment.

Accordingly, the tip of the wrench body 34a is provided in a spherical shape. The spring supporting hole 2 is provided near the tip of the wrench body 34a in a direction perpendicular to the axis of the wrench body 34a.

Grooves 21 are formed on both sides of the wrench body 34a in a direction perpendicular to the axis of the wrench body 34a along the wall surface 2a forming the spring support hole 2.

On the other hand, although the spring 36 has a substantially C-shape, there are some differences from the springs of the other embodiments. Cap screw side contact portions 36a on both sides,
36a, adjacent portions 39 on both sides of the opening 36b,
The provision of 40 is the same as the spring of the first embodiment.

On the other hand, on the opposite side of the opening 36b, a convex portion 47 which is curved inward is formed, unlike the other examples.
The wrench-side holding portions 45 and 46 are provided on both sides of the.

The cap screw side contact portions 36a, 36a on both sides of the spring 36 are supported by the spring support holes 2 of the wrench body 34a so as to slightly protrude from the support holes 2, and the aforementioned adjacent portions 39, 40 The wrench-side holding portions 45 and 46 are supported in the groove 21 on the other side, respectively. Since the wrench-side holding portions 45 and 46 on the side opposite to the opening 36b are bisected by the convex portion 47,
The elastic force of the cap screw side contact portion 36a with respect to the pressure (direction of arrow P) in the direction perpendicular to the axis of the wrench 34a is superior to the spring main portion 38 of the spring 35 of the first embodiment. FIG. 16 is a perspective view of a hexagonal rod torque wrench having a substantially spherical tip with no spring support hole 2 formed, and is a reference view for facilitating understanding of the hexagonal rod wrench having a substantially spherical tip.

Thus, this embodiment also has the advantage of the first embodiment.

The seventh embodiment will be described with reference to FIGS. 17, 18 and 19. FIG. The wrench body 34a of this embodiment is not different from that of the first embodiment. The tip of the wrench body 34a is a hexagonal spherical body, and a spring supporting hole 2 is provided in this spherical portion as in the first embodiment.

A pair of grooves 2 is formed on the wall of the spring support hole 2.
Although 1, 21 are provided, they are not different from the first embodiment.

A slight difference from the first embodiment is that
As apparent from FIG. 18, although the shape of the spring 35 is substantially C-shaped, the opening 35a side of the adjacent portions 39 and 40 on both sides of the opening 35a is curved inward, and Spring main part 3 on the opposite side of 35a
8 is slightly inwardly curved at an obtuse angle with respect to the center of the line 8.

The spring 35 is elastically mounted in the spring supporting hole 2 of the wrench body 34a, and a cap screw side contact portion 44 provided at a boundary between the spring main portion 38 and adjacent portions 39 and 40 on both sides thereof. 43 is inserted so as to slightly protrude from the spring support hole 2. Further, the adjacent portions 39 and 40 and the spring main portion 3
The projections 38a formed at the central portion of
1 and 21 so that the spring 35 does not come off or rotate in the spring support hole 2.

The eighth embodiment will be described with reference to FIGS. 20, 21 and 22. This embodiment is not different from the seventh embodiment. In the seventh embodiment, the tip of the wrench body 34a is a hexagonal spherical body. However, in the eighth embodiment, the configuration is the same except that there is no spherical portion. For the description, the description of the first embodiment and the seventh embodiment is cited and omitted.

The ninth embodiment will be described with reference to FIGS. 23, 24 and 25. The embodiment of the present invention is the same as the first embodiment except for the configuration of the spring 60.

Therefore, differences will be described, and the description of the first embodiment will be omitted and the common configuration will be omitted.

The structure of the spring 60 has a substantially S-shape, as is apparent from FIG. Openings 62, 62 are provided on both sides from the form, and the opening 6
Adjacent portions 64, 64 are formed on both sides of 2, 2, respectively. Cap screw side contact portions 66 are formed on the side parallel to the openings 62 (up and down in the drawing).

The spring 60 is elastically mounted in the spring supporting hole 2 of the wrench body 34a, and the cap screw side contact portions 66, 66 are inserted so as to slightly protrude from the spring supporting hole 2. The adjacent portions 64, 64, 64, 64 face the grooves 21, respectively, so that the spring 60 is prevented from coming off the spring support hole 2 or turning. The elasticity of the cap screw side contact portions 66, 66 with respect to the pressure perpendicular to the axis of the wrench 34a is superior to the spring 35 of the first embodiment.

The tenth embodiment will be described with reference to FIGS. 26, 27 and 28. The embodiment of the present invention is the same as the first and ninth embodiments except for the configuration of the wrench body 34a provided with the spring support hole 2.

The tenth embodiment differs from the tenth embodiment in that there is no spherical portion at the tip of the wrench body 34a, and the configuration is the same.
And the description of No. 9 is referred to and omitted.

The eleventh embodiment will be described with reference to FIGS. 29 and 30. A slit 48 is provided from the center of one end surface of the torque wrench main body 1a in the direction perpendicular to the axis of the torque wrench main body 1a to the axis of the torque wrench main body 1a and to the other side. 48, the torque wrench body 1a, which is cut in half on both sides, is gradually expanded in the H direction as shown in the figure.

The inventor also plans to provide a relief hole 49 at the other end of the slit 48 with a circular cross section in order to avoid concentration of stress during use.

Thus, in this embodiment, the wrench main bodies 1a on both sides of the slit 48 are gradually expanded outward with reference to the other end of the slit 48. 1a is compressed so as to reduce the width of the slit 48 by receiving a stress from the outside, but on the other hand, has an action of elongating by being constantly restored.

Therefore, the slit 4 of the wrench body 1a
By inserting the eight parts into the hexagonal holes such as screws, the wrench body 1a located at the slit 48 part is restored and extended, so that the hexagonal holes such as screws and the wrench body 1a are securely held. Is done.

In addition, although not shown as another example of the above-described embodiment, the diameter in the direction perpendicular to the slit surface at the tip of the wrench body is changed to the diameter on the other side without expanding the slit in the above-described embodiment. The same function can be obtained by making it thicker in comparison.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention, in which an intermediate portion is omitted.

FIG. 2 is a sectional view taken along line EE of FIG.

FIG. 3 is a sectional view showing a use state of the first embodiment of the present invention;

FIG. 4 is a perspective view of the second embodiment of the present invention, in which an intermediate portion is omitted.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a sectional view showing a use state of Embodiment 2 of the present invention;

FIG. 7 is a perspective view of Embodiment 3 of the present invention in which an intermediate portion is omitted.

FIG. 8 is a sectional view taken along line BB of FIG. 7;

FIG. 9 is a cross-sectional view showing a use state of Embodiment 3 of the present invention.

FIG. 10 is a perspective view of Embodiment 4 of the present invention in which an intermediate portion is omitted.

FIG. 11 is a sectional view taken along line CC of FIG. 10;

FIG. 12 is a cross-sectional view showing a use state of Embodiment 4 of the present invention.

FIG. 13 is a sectional view of a main part of a fifth embodiment of the present invention.

FIG. 14 is a sectional view taken along line DD of FIG. 13;

FIG. 15 is a sectional view of a main part of a sixth embodiment of the present invention.

FIG. 16 is a perspective view of a conventional hexagonal rod torque wrench having a substantially spherical tip with an intermediate portion omitted.

FIG. 17 is a perspective view of Embodiment 7 of the present invention in which an intermediate portion is omitted.

18 is a sectional view of a main part of FIG.

FIG. 19 is a cross-sectional view showing a use state of Embodiment 7 of the present invention.

FIG. 20 is a perspective view of Embodiment 8 of the present invention in which an intermediate portion is omitted.

FIG. 21 is a sectional view of a main part of FIG. 20;

FIG. 22 is a sectional view showing a use state of Embodiment 8 of the present invention.

FIG. 23 is a perspective view of Embodiment 9 of the present invention in which an intermediate portion is omitted.

FIG. 24 is a sectional view of a main part of FIG. 23;

FIG. 25 is a cross-sectional view showing a use state of Embodiment 9 of the present invention.

FIG. 26 is a perspective view of the tenth embodiment of the present invention, in which an intermediate portion is omitted.

FIG. 27 is a sectional view of a main part of FIG. 26;

FIG. 28 is a cross-sectional view showing a use state of Embodiment 10 of the present invention.

FIG. 29 is a perspective view of the eleventh embodiment of the present invention, in which an intermediate portion is omitted.

FIG. 30 is a cross-sectional view showing a use state of Embodiment 11 of the present invention.

[Explanation of symbols]

 Reference Signs List 1 hexagon stick torque wrench 1a hexagon stick torque wrench main body 2 spring support hole 2a wall surface forming spring support hole 3 spring support hole 4 substantially C-shaped spring 4a substantially C-shaped spring opening 6 adjacent portion 6a adjacent Part 5 Cap screw 7 Wrench side holding part 8 Cap screw side contact part 9 Cap screw side contact part 10 Substantially C-shaped spring 10a Spring opening 11 Adjacent part 12 Wrench side holding part 13 Spring support hole 14 Spring support hole DESCRIPTION OF SYMBOLS 15 Cap screw side contact part 16 Wrench side holding part 17 Holding part 17a Holding part 18 Wrench side holding part 19 Hexagonal hole of cap screw 20 Spring supporting hole 21 Groove 22 Spring 23a Wall surface 23 Adjacent part 24 Wrench side holding part 25 Adjacent part 26 Ren Side holding part 27 Cap screw side contact part 28 Wrench side holding part 29 Hexagonal hole of cap screw 34 Hexagonal torque wrench 34a Hexagonal torque wrench body 35 Approximately C-shaped spring 35a Spring opening 36a Hexagonal hole side retaining part 37 Hexagon Tip end of rod torque wrench body 38 Main part of spring 39 Adjacent part of opening 40 Adjacent part of opening 41 Shaft core of cap screw 42 Shaft core of hexagonal rod torque wrench main body 43 Cap screw side contact part 44 Cap screw side contact Part 45 Wrench side holding part 46 Wrench side holding part 48 Slit 49 Escape hole 52 Groove 53 Wrench side holding part 55 Cap screw side contact part 56 Adjacent part 60 Substantially S-shaped spring 62 Spring opening 64 Adjacent part 66 Cap screw side Contact part

Claims (5)

[Claims] 1. A hexagonal rod torque wrench having a torque wrench main body having a hexagonal cross section, wherein a spring supporting hole is provided near a tip of the torque wrench main body in a direction perpendicular to an axis of the torque wrench main body. A C-shaped spring, the main part of the spring on the opposite side of the opening, the adjacent parts on both sides of the opening,
A cap screw side contact portion is provided at a boundary between the spring main body portion and adjacent portions on both sides, and at least one of the cap screw side contact portions is a spring support hole of the torque wrench body. A hexagonal rod wrench characterized by being spring-loaded into the spring support hole so that it slightly protrudes from the hole. 2. A hexagonal rod torque wrench having a torque wrench main body having a hexagonal cross section, wherein a spring support hole penetrates the torque wrench main body near a tip end of the torque wrench main body in a direction perpendicular to an axis of the torque wrench main body. On the other hand, a substantially C-shaped spring is provided, and a spring main body portion is provided on the opposite side of the opening, and adjacent portions are provided on both sides of the opening.
Cap screw side contact portions are provided at the boundaries between the spring main body portion and the adjacent portions on both sides, and these cap screw side contact portions are respectively mounted on the spring support holes so as to slightly protrude from the support holes of the torque wrench body. Hexagon torque wrench characterized by being made. 3. The torque wrench main body according to claim 3, wherein at least one of the wall surfaces near the tip of the torque wrench main body and the inner wall near the front end of the torque wrench main body. A groove is provided at right angles to the groove, and one of a spring main portion and an adjacent portion on both sides of the opening of the substantially C-shaped spring is supported by the groove. Hexagon torque wrench according to 2. 4. The hexagonal rod torque wrench according to claim 1, wherein a tip portion of the torque wrench body provided with a spring supporting hole is a substantially spherical body having a substantially hexagonal cross section. 5. A hexagonal rod torque wrench having a hexagonal cross section of a torque wrench main body, wherein the torque wrench main body has a hexagonal cross section, and extends from a central portion at one end in a direction perpendicular to the axis of the torque wrench main body to the axis of the torque wrench main body and to the other side. A hexagonal rod torque wrench, wherein a slit is provided, and a torque wrench body located on at least one side of the slit is extended outward with respect to the other end of the slit.