JPH0970762A - Box spanner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a box spanner capable of improving the operability in attaching/detaching a bolt, and facilitating automation of the bolt attaching/ detaching work. SOLUTION: A box spanner 1 is provided with a guide surface 9 which generates the relative rotation between a bolt head part and a socket part 2 in an abutting manner on a corner part of the bolt head part, and in which the position of a corner part 6 of a hexagonal hole 3 agrees with the position of the corner part of the bolt head part on the inlet side of the hexagonal hole 3 of the socket part 2 when the corner part 6 of the hexagonal hole 3 is deviated from the corner part of the bolt head part in the rotational direction in inserting a bolt head part 7 in the hexagonal hole 3 of the socket part 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box spanner, and more particularly to an improved box spanner which can be quickly and easily mounted on a bolt head.

[0002]

2. Description of the Related Art Conventionally, a socket portion having a polygonal hole corresponding to the polygonal shape of a bolt head has been used as one of tools for attaching and detaching hexagonal bolts and square bolts which are means for connecting parts such as machines. There is known a box wrench provided with a shaft portion extending from the socket portion for rotating the socket portion.

In such a box spanner, since the rotating torque can be dispersed and transmitted to the outer peripheral surfaces of the bolt head at a plurality of positions, a large tightening torque can be produced, and the bolt head can be a member. It has the advantage that it can be used without problems even when it is buried in the formed spot facing portion, and is used for assembling various machines and connecting members.

When the bolts are attached and detached with this box spanner, first, the positions of the corners of the polygonal hole of the socket are aligned with the positions of the corners of the bolt head, and then the bolt head is moved as described above. The socket part is moved to the bolt head side so that the socket part comes into the polygonal hole.

[0005]

However, in the box spanner, the bolt head is hidden by the socket portion when the socket portion is brought close to the top of the bolt portion, so that the corner portion of the polygonal hole in the socket portion is hidden. It is not possible to insert the bolt head into the polygonal hole while visually observing the position of and the position of the corner of the bolt head.

Therefore, normally, when the inlet of the polygonal hole of the socket portion is brought into contact with the head portion of the bolt, the socket portion is slightly rotated with respect to the bolt, and the position of each corner portion is felt by touch. Match, but such a corner matching operation is
This increases the burden on the worker and causes a decrease in workability. It also becomes a factor that makes automation of bolt attachment / detachment difficult.

If the bolt is attached or detached while the engagement between the polygonal hole of the socket and the bolt head is incomplete, the corner of the polygonal hole or the corner of the bolt head may be rotated due to idle rotation of the socket. This causes problems such as damage to parts.

The present invention has been made in view of the above situation,
When inserting the bolt head into the polygonal hole of the socket, simply insert the socket into the bolt hole even if the corners of the polygonal hole and the corners of the bolt head are misaligned in the direction of rotation. By providing a box wrench that can quickly introduce the bolt head into the socket by simply pressing it against the head, it improves operability during bolt attachment / detachment work, and particularly facilitates application to automation of bolt attachment / detachment work. To aim.

[0009]

The structure of a box spanner according to the present invention for achieving the above object comprises a socket portion which has a polygonal hole corresponding to a bolt head and which is pivotally operated. In the box spanner, the socket portion is arranged on the bolt rotation shaft, and when the bolt head is fitted into the polygonal hole and the bolt is rotated, the corner of the bolt head and the corner of the polygonal hole are When the parts are relatively displaced in the rotational direction, the corners of the bolt head contact and cause relative rotation between the bolt and the socket part, and the corners of the bolt head and the It is characterized in that a guide surface which aligns with a corner portion of the polygonal hole is formed on an inlet side of the polygonal hole.

Alternatively, the guide surface is an inclined surface between the adjacent corners of the polygonal hole and extends from one corner toward the other corner to the inner depth of the polygonal hole. It is characterized in that it is provided for each of the bolt pressing surfaces forming the square hole.

Alternatively, the guide surface is two inclined surfaces that descend from the middle of the adjacent corners of the polygonal hole toward the corners on both sides toward the inner depth of the polygonal hole, and the polygonal hole. It is characterized in that it is provided for each of the bolt pressing surfaces constituting the.

When the inlet side of the polygonal hole of the socket portion is pressed against the bolt head and the position of the corner of the polygonal hole and the position of the corner of the bolt head deviate, the bolt head Corner portions of the contact points against guide surfaces formed on the inlet side of the polygonal hole. As a result, the guide surface causes relative rotation between the bolt head and the socket, and aligns the position of the corner of the polygonal hole with the position of the corner of the bolt head.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a box spanner according to the present invention will be described in detail below with reference to the drawings. FIG.
1 is a perspective view showing an embodiment of a box wrench according to the present invention, FIG. 2 is a front view of a socket portion (a view in the direction of arrow A in FIG. 1), FIG.
FIG. 7 is an explanatory view of the operation of the box spanner.

The box spanner 1 of this embodiment is for a hexagon bolt, and the bolt head 7 of the hexagon bolt (see FIG. 3).
Socket portion 2 having a hexagonal hole 3 corresponding to the hexagonal shape and having a diameter slightly larger than that of the head portion 7, and a shaft extending from the socket portion 2 for rotating the socket portion 2. And a bolt head 7 is inserted into the hexagonal hole 3 and then the shaft portion 4 is manually or appropriately rotated by a driving source to tighten the bolt. Or remove it.

On the inlet side of the hexagonal hole 3 of the socket portion 2, a bolt head 7 is provided on the inlet side of the hexagonal hole 3 as shown in FIG.
When the corner portion 6 of the hexagonal hole 3 and the corner portion 8 of the bolt head 7 are misaligned in the rotation direction when they are fitted to each other, the corner portion 8 of the bolt head 7 contacts and the bolt head 7 A guide surface 9 is provided which causes relative rotation between the portion 7 and the socket portion 2 to align the position of the corner 6 of the hexagonal hole 3 with the position of the corner 8 of the bolt head 7. .

The guide surface 9 has a smooth slope between the adjacent corners 6, 6 of the hexagonal hole 3 and descends from one corner 6 toward the other corner 6 inwardly of the hexagonal hole 3. Each bolt pressing surface 10 formed as a surface and forming the hexagonal hole 3 is provided.

In the box wrench 1 having the above-mentioned structure, when the inlet side of the hexagonal hole 3 of the socket 2 is pressed against the bolt head 7, the position of the corner 6 of the hexagonal hole 3 will be changed as shown in FIG. When the position of the corner 8 of the bolt head 7 is deviated, the corner 8 of the bolt head 7 hits the guide surface 9 provided on the inlet side of the hexagonal hole 3, and the guide surface 9 is inclined. The action causes relative rotation (rotation of the bolt head 7 in the direction of arrow (a)) between the bolt head 7 and the socket portion 2, and as a result, the corner 6 of the hexagonal hole 3 and the bolt head Corner 8 of part 7
And are aligned as shown in FIG.

Therefore, when the bolt head 7 is fitted into the hexagonal hole 3 of the socket portion 2, even if the position of the corner 6 of the hexagonal hole 3 and the position of the corner 8 of the bolt head 7 are in the rotational direction. Even if they are deviated from each other, it is not necessary to align the corners with each other, and the bolt head 7 can be quickly pushed into the hexagonal hole 3 of the socket 2 by simply pressing the socket head 2 against the bolt head 7. Can be led to. Therefore, it is possible to improve the workability of the bolt attachment / detachment work, and to facilitate automation of the bolt attachment / detachment work.
Damage to bolts and sockets due to incomplete fitting is prevented.

4 and 5 show another embodiment of the box spanner according to the present invention. FIG. 4 is a perspective view of a box spanner according to another embodiment, and FIG. 5 is an explanatory view of its operation. The box spanner 11 of this embodiment is also for hexagon bolts,
Guide surface 9 of hexagonal hole 3 with which corner 8 of bolt head 7 abuts
The structure is different from that of the previous embodiment, and the other parts are the same. Therefore, the same parts and the same parts are designated by the same reference numerals and the description thereof will be omitted.

The guide surface 9 of this embodiment has a hexagonal hole 3
Two slanting surfaces 9a that descend from the middle of the adjacent corners 6 toward the corners 6 on both sides to the inner depth of the hexagonal hole 3,
9b and is provided for each bolt pressing surface 10 that constitutes the hexagonal hole 3.

In the box wrench 11 having the above structure, when the socket 2 is pressed against the bolt head 7, the position of the corner 6 of the hexagonal hole 3 and the corner of the bolt head 7 as shown in FIG. 8
If the position is deviated from the position, the corner 8 of the bolt head 7
Depending on which inclined surface 9a, 9b of the guide surface 9 is contacted (abutting on 9b in the figure), the bolt head 7 and the socket portion 2
As in the previous embodiment, the guide surface 9 is different from the bolt head 7 and the socket portion 2 only in the direction of the relative rotation between them.
A relative rotation is caused between them to align the position of the corner 6 of the hexagonal hole 3 with the position of the corner 8 of the bolt head 7 to obtain the same effect as the above. Then, in the guide surface 9 of this embodiment, the relative rotation amount until the position of the corner 6 of the hexagonal hole 3 and the position of the corner 8 of the bolt head 7 are aligned is at the maximum, Since it can be shortened to 1/2, the alignment between the corners can be completed more quickly than in the previous embodiment.

In each of the above-described embodiments, the shape of the bolt head to be handled is hexagonal.
It goes without saying that the shape of the bolt head can be applied to the case of a quadrangle or another polygon.

[0023]

According to the box spanner of the present invention, when the inlet side of the polygonal hole of the socket is pressed against the bolt head,
Even if the position of the corner of the polygonal hole and the position of the corner of the bolt head deviate in the direction of rotation, the corner of the bolt head hits the guide surface on the inlet side of the polygonal hole, and the guide surface A relative rotation is caused between the bolt head and the socket portion to align the position of the corner of the polygonal hole with the position of the corner of the bolt head. Therefore, when inserting the bolt head into the polygonal hole of the socket, it is not necessary to align the corners with each other, and simply press the socket onto the bolt head to quickly move the bolt head. Since it can be inserted into the polygonal hole of the socket, the operability is improved. Therefore, it is possible to improve workability when attaching and detaching the bolt, facilitate automation of the bolt attaching and detaching work, and prevent damage to the bolt and the socket portion due to incomplete fitting. .

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a box spanner according to the present invention.

FIG. 2 is a front view of the socket portion of the box spanner.

FIG. 3 is an explanatory view of the operation of the box spanner.

FIG. 4 is a perspective view of another embodiment of the box spanner according to the present invention.

FIG. 5 is an explanatory view of the operation of the box spanner.

[Explanation of symbols]

 1 Box spanner 2 Socket part 3 Hexagonal hole 4 Shaft part 6 Corner part 7 Bolt head 8 Corner part 9 Guide surface 9 Inclined surface 10 Bolt holding surface 11 Box spanner

Claims (3)

[Claims] 1. A box spanner provided with a socket portion that is pivotally operated with a polygonal hole corresponding to a bolt head, wherein the socket portion is arranged on a bolt rotating shaft, and the bolt head is When the bolt is inserted into the polygonal hole and the bolt is rotated, when the corner of the bolt head and the corner of the polygonal hole are relatively misaligned in the rotation direction, the corner of the bolt head is A portion abuts each other to cause relative rotation between the bolt and the socket portion, and a guide surface for aligning a corner portion of the bolt head and a corner portion of the polygonal hole is provided on an inlet side of the polygonal hole. Box wrench characterized by being formed. 2. The guide surface is an inclined surface between the adjacent corners of the polygonal hole, the sloped surface descending from one corner toward the other corner inside the polygonal hole, and The box wrench according to claim 1, wherein the box wrench is provided for each of the bolt pressing surfaces that form the rectangular hole. 3. The guide surface is two inclined surfaces that descend from the middle of the adjacent corners of the polygonal hole toward the corners on both sides toward the inner depth of the polygonal hole, and the polygonal hole. The box spanner according to claim 1, wherein the box spanner is provided for each of the bolt pressing surfaces constituting the.