JP4521997B2 - Fastening device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fastening device used for fastening, for example, a hexagon nut or a bolt.
[0002]
[Prior art]
Some hex nuts used in complex devices and machines are located in a very narrow space. It is difficult to tighten such a hexagon nut with a general spanner.
[0003]
Conventionally, as one method of tightening a hex nut existing in a very narrow space, there is a method in which an operator tightens a hex nut using a spanner having a fitting portion bent with respect to a base portion.
[0004]
[Problems to be solved by the invention]
However, the conventional method has a drawback that the work efficiency is low because the operator manually tightens the hexagon nuts one by one.
[0005]
Then, the subject of this invention is providing the clamping device which can improve the efficiency of the operation | work which clamp | tightens a to-be-fastened thing.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the tightening device of the invention of claim 1 comprises:
The body,
With fan-shaped gear,
A drive gear attached to the main body and meshing with the sector gear, and turning the main body along the sector gear;
A spanner attached to the main body;
Moving means for moving the spanner part relative to the main body ,
The spanner part is composed of a base part and a fitting part bent with respect to the base part,
The moving means includes a first advancing / retreating mechanism for advancing / retreating the spanner part along a turning surface of the main body and a second advancing / retreating mechanism for advancing / retreating in a direction intersecting the turning surface .
[0007]
In the tightening device according to the first aspect of the present invention, the spanner is moved by the moving means, and the spanner is fitted to an object to be tightened, for example, a hexagon nut. Thereafter, when the drive gear is rotated and the main body is turned along the sector gear, the spanner attached to the main body is rotated. Thus, since the spanner part automatically rotates as the main body turns, the operator does not need to directly operate the spanner part and tighten the hexagon nut. Therefore, the efficiency of the operation | work which clamp | tightens a to-be-fastened thing can be improved.
[0008]
Moreover, since the spanner part automatically rotates with the turning of the main body, there is no need to provide a link mechanism for rotating the spanner part. Therefore, the size can be reduced by not providing the link mechanism.
[0009]
[0010]
Moreover , the spanner part is moved by the said moving means, and the fitting part of a spanner part is fitted to a hexagon nut, for example. At this time, since the spanner part is composed of a base part and a fitting part bent with respect to the base part, even with a hexagon nut located in a very narrow space, the fitting part of the spanner part can be easily fitted. Can do.
[0011]
Further, the moving means is composed of a first advance / retreat mechanism that advances and retracts the spanner part along the turning surface of the main body and a second advance / retreat mechanism that advances and retracts in the direction intersecting the turning surface. The degree of freedom is large, and it is possible to tighten the objects to be tightened at various positions.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the tightening device of the present invention will be described in detail with reference to the illustrated embodiments.
[0013]
FIG. 1 is a schematic view of a tightening device according to an embodiment of the present invention as viewed from above. As shown in FIG. 1, the tightening device is attached to a main body 1, a sector gear 2, a drive gear 6 that meshes with the sector gear 2 and rotates the main body 1 along the sector gear, and the main body 1. And a moving means 5 for moving the spanner part 4 with respect to the main body 1. The main body 1 has abacus ball-shaped guide rollers 3, 3,... Guided by guide surfaces 2b, 2c having a V-shaped cross section of the sector gear 2. A gear portion 2 a that meshes with the drive gear 6 is formed on the outer peripheral surface of the sector gear 2.
[0014]
As shown in FIG. 2, the drive gear 6 is attached to the tip of the rotation output shaft of an AC servo motor 7 mounted on the main body 1. The spanner portion 4 includes a base portion 4b and a fitting portion 4a bent with respect to the base portion 4b. The moving means 5 moves the spanner portion 4 along the turning surface of the main body 1 and the sector gear 2. An air cylinder 52 as a first advance / retreat mechanism that advances and retreats along a radial line that intersects the center line, and an air cylinder 51 as a second advance / retreat mechanism 51 that advances and retreats in a direction intersecting the turning surface of the main body 1. It is configured. The first advancing / retracting mechanism 52 is attached to the main body 1 so as to be inclined with respect to the turning surface of the main body 1. And the abacus ball-shaped guide rollers 3, 3,... Are fitted to the guide surfaces 2b, 2c having a V-shaped cross section of the sector gear 2 in a freely rolling manner. On the other hand, it is supported by the guide rollers 3, 3,... And can respond to the bending moment from the spanner section 4. The guide rollers 3, 3,... Are fitted to shafts 8, 8,... That are rotatably attached to the main body 1, and are fixed to the shafts 8, 8,.
[0015]
When the hexagon nut 10 located in a very narrow space is tightened using the tightening device having the above-described configuration, the following operation is performed.
[0016]
First, the spanner part 4 is lowered by the air cylinder 51, and the height of the fitting part 4a of the spanner part 4 and the height of the hexagon nut 10 are matched. At the same time, the drive gear 6 is rotated by the AC servo motor 7 to adjust the position of the fitting portion 4 a so that the fitting portion 4 a is fitted to the hexagon nut 10. And the said nut part 4 is advanced to the hexagon nut 10 side with the air cylinder 52, and the fitting part 4a is fitted to the hexagon nut 10. FIG. After that, when the drive gear 6 is driven to rotate and the main body 1 is turned along the sector gear, the spanner part 4 attached to the main body 1 rotates around the fitting part 4a. As described above, since the spanner 4 automatically rotates as the main body 1 turns, the operator does not need to directly operate the spanner 4 to tighten the hexagon nut 10. Therefore, the efficiency of the operation | work which fastens the said hexagon nut 10 can be improved.
[0017]
Further, as the main body 1 turns, the spanner portion 4 automatically rotates around the fitting portion 4a. Therefore, it is not necessary to provide a link mechanism for rotating the spanner portion 4. Therefore, the size of the device can be reduced by the amount that the link mechanism is not provided.
[0018]
Moreover, the spanner part 4 is moved with the said moving means 5, and the fitting part of the spanner part 4 is fitted to the hexagon nut 10, for example. At this time, since the spanner part 4 includes a base part 4b and a fitting part 4a bent with respect to the base part 4b, the hexagonal nut 10 located in a very narrow space can also be used for the fitting part of the spanner part 4. It can be easily fitted.
[0019]
Further, the moving means 5 is composed of a first advance / retreat mechanism that advances and retracts the spanner part 4 along the turning surface of the main body and a second advance / retreat mechanism that advances and retracts in the direction intersecting the turning surface. The degree of freedom to move 4 is large, and the hexagon nuts 10 at various positions can be tightened.
[0020]
【The invention's effect】
As is clear from the above, in the tightening device of the first aspect of the invention, the spanner part automatically rotates as the main body turns, so that the operator directly operates the spanner part to remove the object to be tightened. There is no need for tightening, and the efficiency of the work of tightening the object to be fastened can be improved.
[0021]
Moreover, since the spanner part automatically rotates with the turning of the main body, it is not necessary to provide a link mechanism for rotating the spanner part, and the size can be reduced by not providing the link mechanism.
[0022]
Further , when the spanner part is moved by the moving means and the fitting part of the spanner part is fitted to the article to be tightened, the spanner part includes a base part and a fitting part bent with respect to the base part. Therefore, the fitting part of the spanner part can be easily fitted even with a fastened object located in a very narrow space.
[0023]
In addition, the moving means includes a first advance / retreat mechanism that advances and retracts the spanner part along the turning surface of the main body and a second advance / retreat mechanism that advances and retracts in the direction intersecting the turning surface. The degree of freedom is large, and it is possible to tighten the objects to be tightened at various positions.
[Brief description of the drawings]
FIG. 1 is a schematic view of a tightening device according to an embodiment of the present invention as viewed from above.
FIG. 2 is a schematic cross-sectional view of the tightening device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Fan-shaped gear 4 Spanner part 4a Fitting part 5 Moving means 6 Drive gear

Claims (1)

The body,
With fan-shaped gear,
A drive gear attached to the main body and meshing with the sector gear, and turning the main body along the sector gear;
A spanner attached to the main body;
Moving means for moving the spanner part relative to the main body ,
The spanner part is composed of a base part and a fitting part bent with respect to the base part,
The moving means comprises a first advancing / retreating mechanism for advancing and retracting the spanner part along the turning surface of the main body, and a second advancing / retreating mechanism for advancing and retreating in a direction intersecting the turning surface. Attached equipment.

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