JPH10235568A - Wrench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wrench capable of surely clamping and removing a bolt with a polygonal fitting hole like a hexagon socket head bolt and a threaded fastener on which both plus and minus engaging grooves are formed, in either case. SOLUTION: A wrench body 10 is provided with an end part whose peripheral surface is formed into a polygon on the whole, and this end part gets into a hexagonal fitting hole formed in a socket head bolt, so that this wrench body is fitted. A driver 11 being metallographically integrated with this wrench body 10, and engaged with an engaging groove formed in the head part of a threaded fastener as projected from the end face, is installed in this end face of the wrench body 10. This end face 14 of the wrench body 10 is turned to a pressurized surface being inclined toward a peripheral part of the wrench body 10 from a base end of this driver 11, and coming into contact with a peripheral part of the head part of the threaded fastener.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for tightening screw members of different types, such as screw parts such as bolts and screws with holes formed with polygonal fitting holes such as regular hexagons, using a single wrench. The present invention relates to a wrench capable of performing a removing operation.

[0002]

2. Description of the Related Art For tightening and removing hexagon socket head bolts, a wrench, also called a rod spanner, whose end is inserted into a hexagon socket, is used to tighten and remove a plus screw part and a minus screw part. In order to tighten and remove the bolt, a wrench, also called a spanner, is fitted from the outside to the hexagonal head of the bolt for tightening and removing the bolt. .

For each wrench and driver, the type of a screw member to be tightened or removed is specified. For example, the driver is provided only with a screw part having an engagement groove formed in a head portion such as a screw. Can be used only for tightening. Therefore, when tightening and removing various types of screw members, such as various types of screw members, such as ordinary bolts, hexagon socket head bolts, screws, etc., prepare various tools corresponding to the types of screw members. It is necessary to keep it.

In order to tighten or remove any type of screw member, such as a screw part called a screw and a hexagon socket head bolt, for example, as shown in Japanese Utility Model Application Laid-Open No. 62-192875, a rod spanner is used. A wrench of a type in which a driver bit is attached to the tip of a wrench has been proposed.

[0005]

In this wrench, a bar-shaped spanner body, that is, a wrench body has a flat end surface, and a driver bit is removably attached to the end portion thereof. The bits protrude. However, as shown in this publication, when a driver bit is fitted into a mounting hole formed in a wrench body and the driver bit is fixed with a screw, tightening of a screw part using the driver bit or If a large load is applied to the driver bit during the removal operation, the driver bit may rotate in the mounting hole.

Further, in the case where the tip end face of the rod spanner main body is made flat and the driver bit is projected from the tip end face as in the conventional wrench described in the above-mentioned publication, tightening and removing of the screw is performed. Therefore, when the screw is being rotated, the driver bit may come off from the engagement groove of the screw. It is presumed that the reason is that the engagement between the driver bit and the engagement groove is not sufficiently performed. In particular, when the rod spanner body is formed in an L-shape,
It is considered that the hand cannot be placed on the extension of the rotation center axis of the screw, so that the screw cannot be pressed with a strong force.

An object of the present invention is to securely tighten or remove both a bolt having a polygonal fitting hole, such as a hexagon socket head bolt, and a screw component having a plus or minus engaging groove. It is to provide a wrench like that.

Another object of the present invention is to provide a wrench capable of securely fastening and removing both a large-diameter bolt having a polygonal fitting hole and a small-diameter bolt having a smaller outer diameter. To provide.

The above and other objects and novel features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

[0010]

SUMMARY OF THE INVENTION Among the inventions disclosed in the present application, the outline of a representative one will be briefly described.
It is as follows.

That is, a wrench according to the present invention has a wrench having an outer peripheral surface having a polygonal end, wherein the end enters a polygonal fitting hole formed in a bolt with a hole and is fitted therein. A main body, a driver provided on the end face of the wrench main body so as to protrude from the end face integrally with the wrench main body in a metallurgical manner, and engaged with an engagement groove formed in a head of the screw component; A pressure surface is formed on an end surface of the wrench body, which is inclined from a base end of the driver toward an outer peripheral portion of the wrench main body and comes into contact with an outer peripheral portion of a head of the screw component.

Further, the wrench of the present invention has a polygonal shape in which an outer surface of an end portion of a wrench body to be fitted into a polygonal fitting hole formed at an end portion of the large-diameter bolt corresponds to the fitting hole. Formed in the end face of the wrench body, a polygonal fitting hole is formed in which the head of the small-diameter bolt smaller in outer diameter than the large-diameter bolt is inserted, and the screws of both the large-diameter bolt and the small-diameter bolt are formed. It is characterized in that a tightening operation can be performed.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an overall perspective view showing a wrench, which is an embodiment of the present invention and is also referred to as a spanner. This wrench has a wrench body 10 which is formed by bending it into an L-shape as a whole. ing.

FIG. 2A is an enlarged perspective view of one end portion shown in FIG. 1, FIG. 2B is a plan view showing the end surface of FIG. 2A, and FIG. FIG. 3A shows a state in which a hexagon socket head bolt is being tightened or removed using the wrench shown in FIG. 1, and FIG. 3B shows a state in which a screw, that is, a screw part, is tightened or removed using the wrench. Indicates the status of the operation.

As shown in FIG. 1, the wrench main body 10 has a regular hexagonal cross section in its entire outer surface including the ends. As shown in FIG. 3A, the ends of the regular hexagons are hexagonal. A regular hexagonal fitting hole 22 formed in the head 21 of the holed bolt 20 is inserted.

Drivers 11 are provided on both end faces of the wrench body 10 so as to be metallically integrated with the wrench body 10 and protrude axially outward from the end faces. The illustrated driver 11 is a Phillips screwdriver, and has a cruciform shape and extends so that the width in the lateral direction increases from the distal end surface 12 to the proximal end portion 13. The end surface 14 of the wrench body 10 is inclined from the base end 13 of the driver 11 toward the outer periphery, and the inclined end surface is a pressing surface.
Thereby, as shown in FIG. 3B, when the driver 11 is engaged with the cross-shaped engagement groove 32 formed on the head 31 of the screw component 30, the end face 14 is
1 comes into contact with the outer peripheral portion.

Therefore, the driver 11 is connected to the screw 30
When the end of the wrench body 10 is approximated to the head 31 of the screw part 30 when the engagement is made with the engagement groove 32, the head of the screw part 30 is guided to the inclined end face 14. Therefore, the driver 11 can be reliably engaged with the engagement groove 32. Therefore, when the screw part 30 is to be tightened or removed in a narrow place, or when the screw part 30 is to be tightened in a so-called dark place where the head 31 of the screw part 30 is difficult to see, the engagement groove 32 is surely formed.
Can be engaged with the driver 11. In addition, even when the driver 11 is about to disengage from the engagement groove 32 in the lateral direction during the operation of tightening or removing the screw part 30, the inclined end surface contacts the head 31 of the screw part 30, The detachment movement is restricted, and the driver 11 is prevented from coming off the engagement groove 32.

As shown in FIG. 1, the wrench body 10 is bent into an L-shape so that the operator's hand can be arranged on the extension of the center of rotation of the screw part 30 when the screw part 30 is rotated. Even if a large pressing force cannot be transmitted to the screw component 30 via the wrench body 10,
Since the inclined end surface 14 comes into contact with the outer peripheral portion of the head 31 of the screw component 30, a pressing force can be applied also from that portion, and a larger pressing force can be transmitted to the screw component 30. As a result, the screw component 3
The operation of tightening and removing 0 can be reliably performed without damaging the engagement groove 32.

The driver 11 is integrally formed with the wrench body 10 in a metallographic manner. The driver 11 and the end face 14 are formed into a shape shown in the drawing by cutting using a rod-shaped material having a regular hexagonal cross section, or forged. It can be formed into the shape shown in the drawing by casting or casting.

Therefore, as in the prior art, the wrench body 1
Unlike the case where a mounting hole is formed in the end surface of the wrench 10 and a driver bit, that is, a driver 11 is mounted in the mounting hole, and the driver 11 is fixed to the wrench body 10 using screws, the driver 11 is made of metal. Since the wrench body 10 is systematically integrated with the wrench body 10, the degree of integration of the driver 11 with the wrench body 10 is very strong.

As shown in FIG. 3, the inclined end surface 14
As shown in FIG. 2, the end surface 14 is circumferentially adjacent to a number of radially extending grooves, extending straight from the base end portion 13 of the driver 11 toward the outer peripheral portion of the wrench body 10. A plurality of projections and depressions are provided between the grooves, and a number of projections and depressions are connected in the circumferential direction. Accordingly, when the driver 11 is engaged with the engagement groove 32 of the screw component 30, a large number of concave and convex portions come into pressure contact with the outer peripheral portion of the head 31 of the screw component 30. 30 will surely bite into the head 31. The inclination angle θ of the end face 14 can be set to any angle within a range of about 10 degrees to about 45 degrees, for example.
It can be set to a desired value according to the outer diameter of 0 or the size of the driver 11.

Although the wrench body 10 shown in FIG. 1 is provided with the drivers 11 on both end faces, it may be provided on at least one end face. Further, in the illustrated wrench body 10, the tip surface 12 of the driver 11 slightly protrudes from the tip surface of the wrench body 10, but depending on the outer diameter of the wrench body 10 and the size of the driver 11, the driver The tip surface 12 of the wrench 11 may be substantially the same as the tip surface of the wrench body 10, or the tip surface 12 may be retracted from the tip surface of the wrench body 10.

FIGS. 4A and 4B are views showing a wrench according to another embodiment of the present invention, and FIG. 4A is a perspective view showing one end of a wrench body 10. FIG. 4 (B) is a sectional view thereof.

In the wrench shown in FIG. 4, a driver 11 protruding from an end face of the wrench body 10 is a minus driver, in contrast to the plus driver in the above embodiment. The end surface 14 formed to be inclined from the base end portion 13 of the driver 11 toward the outer peripheral portion of the wrench body 10 is a straight inclined surface in the above-described embodiment, but is curved. It has a dome-shaped slope. In this case, the same effect as in the above embodiment can be obtained.

It should be noted that a flathead screwdriver may be provided on the end surface 14 of the wrench body 10 shown in FIGS. Also, as shown in FIGS. 1 to 3, the end surface 14 of the wrench body 10 having a Phillips screwdriver
May be a curved inclined surface as shown in FIG.

FIG. 5 is a view showing a modified example of the wrench of the type shown in FIGS. 1 to 3. In this case, the driver 11 is a Phillips screwdriver as in the above embodiment, but the end face 14 has A smaller number of grooves are radially formed than in the above embodiment. That is, six grooves 14a are formed on the end surface 14 corresponding to the regular hexagon of the wrench body 10, and the grooves 14a are formed.
Projections 14b are formed between the parts a.

FIG. 6 is a view showing a wrench according to still another embodiment of the present invention. As shown in FIG. 7 (A), the wrench body 10 includes the large-diameter bolt 20a including the end. It is a regular hexagon corresponding to the fitting hole 22a so as to fit into the regular hexagon fitting hole 22a formed in the head 21a at the end.

Then, the end face of the wrench body 10 is
As shown in (B), a regular hexagonal fitting hole 15 into which the head 41 of the small diameter bolt 40 whose outer diameter is smaller than that of the large diameter bolt 20a is formed.

Therefore, in the wrench shown in FIG. 6, any of the large-diameter hexagon socket head bolt 20a and the smaller-diameter bolt 40, that is, the screw member, can be tightened and removed. .

FIG. 8 is a view showing a wrench according to still another embodiment of the present invention. In this case, unlike the above embodiments, the wrench body 10a is an electric wrench having a motor. It is designed to be mounted on the rotating device 51. Therefore, unlike the above embodiments, the wrench body 10a is not bent into an L-shape, but is formed straight, and one end is provided with the driver shown in FIGS. Driver 1 having the same structure as 11
1a is provided, and the other end is a mounting portion which is mounted on a chuck 52 provided on the rotating device 51.
As shown in FIG. 6, the wrench main body having the fitting hole 15 formed at the end thereof may also be configured to rotate the wrench main body 10a by using the rotating device 51 as a driving unit, as shown in FIG. good.

When the wrench is driven to rotate by the rotating device 51 as described above, it is desirable to incorporate a torque limiter therein so that a rotational torque exceeding a predetermined torque value is not transmitted to the wrench.

Although the invention made by the inventor has been specifically described based on the embodiment, the invention is not limited to the above-described embodiment, and can be variously modified without departing from the gist of the invention. Needless to say, there is.

For example, each of the illustrated wrench bodies has a regular hexagonal cross section, but may have a regular square shape. Further, a driver as shown in FIGS. 1 to 5 may be provided at one end of the wrench body, and a fitting hole 15 as shown in FIG. 6 may be provided at the other end.

[0035]

Advantageous effects obtained by typical ones of the inventions disclosed in the present application will be briefly described.
It is as follows.

(1) A single wrench can be used to tighten and remove any of the screws, that is, the screw components and the bolts with holes.

(2) When the screw part is to be tightened or removed at the driver, the screw part can be pressed strongly by pressing the end face against the outer periphery of the head of the screw part, and the screw can be securely screwed. Parts can be tightened and removed.

(3) As described above, since the end face of the wrench body is pressed against the outer periphery of the head of the screw component when the screw component is tightened by the screwdriver, the engagement groove formed in the head is removed. The threaded part can be rotated without breaking.

(4) Also, since the screw part is rotated while the end face of the wrench body is pressed against the outer periphery of the head part of the screw part, the head of the screw part may be narrow, for example. In the case where the screw parts are tightened in a dark state, the work can be easily performed.

(5) A single wrench can tighten and remove both a large-diameter bolt with a hole and a smaller-diameter bolt.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an external shape of a wrench according to an embodiment of the present invention.

2A is an enlarged perspective view showing one end of the wrench shown in FIG. 1, and FIG. 2B is a plan view showing the end face of FIG. 2A.

FIG. 3A is an enlarged sectional view showing a state in which an end of a wrench body is inserted into a fitting hole of a hexagon socket head bolt;
(B) is an enlarged sectional view showing the state where the driver was engaged with the engagement groove of the screw component.

FIG. 4A is an enlarged perspective view showing one end of a wrench according to another embodiment of the present invention, and FIG. 4B is a cross-sectional view of FIG.

FIG. 5 is an enlarged perspective view showing a modified example of the wrench shown in FIGS.

FIG. 6 is an enlarged perspective view showing one end of a wrench according to still another embodiment of the present invention.

FIG. 7A is a cross-sectional view showing a state in which the wrench shown in FIG. 6 is inserted into a fitting hole of a hexagon socket head cap screw;
FIG. 7B is a cross-sectional view illustrating a state where the head of the bolt is inserted into a fitting hole formed at an end of the wrench illustrated in FIG. 6.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Wrench main body 11 Driver 12 Tip surface 13 Base end 14 End surface 20 Hexagon socket head cap screw 21 Head 22 Fitting hole 30 Screw component 31 Head 32 Engagement groove 51 Rotating device 52 Chuck

Claims (6)

[Claims] A wrench body having an end with a polygonal outer peripheral surface, wherein said end is inserted into and fitted into a polygonal fitting hole formed in a bolt with holes; And a driver provided on the end face of the wrench body so as to protrude from the end face integrally with the wrench body in a metallographic manner, and engaged with an engagement groove formed in the head of the screw part. A wrench, wherein a pressing surface is formed to be inclined from a base end portion of the screwdriver toward an outer peripheral portion of the wrench body and to contact an outer peripheral portion of a head of the screw component. 2. The wrench according to claim 1, wherein said driver is a Phillips screwdriver or a flathead screwdriver. 3. The wrench with a driver according to claim 1, wherein the pressing surface is formed in an uneven shape. 4. The wrench according to claim 1, wherein the wrench body is formed in an L-shape, and the driver is provided on both end surfaces of the L-shaped wrench body. A wrench characterized in that: 5. An outer surface of an end of a wrench main body fitted into a polygonal fitting hole formed at an end of a large diameter bolt is formed in a polygonal shape corresponding to the fitting hole, and the wrench is provided. A polygonal fitting hole is formed in the end face of the main body, into which the head of the small-diameter bolt having an outer diameter smaller than that of the large-diameter bolt is inserted, so that both the large-diameter bolt and the small-diameter bolt can be screwed. A wrench characterized by the following. 6. One of claims 1, 2, 3, and 5
The wrench according to claim 1, wherein the wrench body is formed straight, and the driver or the fitting hole is provided on one end surface of the wrench body, and a mounting portion fastened to a chuck rotated by driving means. The wrench is provided at the other end of the wrench main body, and the driving means rotates the wrench main body.