JPS643629B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention is directed to tightening a bolt tightening machine to a support base, and moving the bolt tightening machine along the tightening position of a member to be tightened via the support base. The present invention relates to a bolt tightening device that positions a bolt tightening machine at each tightening position of a member to be tightened while moving the member, and fastens the member to be tightened with bolts and nuts.

``Prior Art'' Conventionally, a bolt tightening machine is attached to a support stand, and the bolt tightening machine is moved along the tightening position of the member to be tightened via the support stand, and each part of the member to be tightened is tightened. When positioning a bolt tightening machine at the tightening position and tightening a bolt or nut on a member to be tightened, it is not appropriate to tighten the bolt tightening machine to the support base. As a result, the reaction force from tightening bolts and nuts will be applied to the support base, causing the relative position of the bolt tightening machine and the member to be tightened to deviate, or if the support base is attached to the member to be tightened, the support This method has the drawback that a reaction force is applied to the member to be tightened via the base, causing harmful effects such as deformation of the member to be tightened. In addition, if the socket that fits into the bolt or nut to be tightened by the bolt tightening machine is hidden behind the member to be tightened, the bolt screwed into the tightening position of the member to be tightened,
The disadvantage is that the worker has to look into the tightening position each time to check whether the socket of the bolt tightening machine can fit into the nut, and it takes a lot of effort and time to tighten the bolts. Ta.

"Problems to be Solved by the Invention" The present invention has been made to eliminate the above-mentioned drawbacks.The present invention has been made in order to eliminate the above-mentioned drawbacks. When tightening a bolt while moving it along the tightening position of the attachment member, make sure that the reaction force is not applied to the support base on which the bolt tightener is attached, and also that the socket of the bolt tightener Even if the socket of the bolt tightening machine is hidden behind the member to be tightened and cannot be seen, the socket of the bolt tightening machine may be able to locate the screwed bolt at the tightening position of the member to be tightened.
To provide a bolt fastening device that allows easy confirmation that the bolt is in a position where it can be fitted into a nut.

``Means for solving the problem'' In other words, a bolt tightening machine equipped with a reaction force receiver is attached to a support base via a mounting pin, and the axis of this mounting pin is an extension of the axis of the socket of the bolt tightening machine. The socket is placed at the top, and the bolt tightening machine is movable so that the socket can fit the bolt or nut screwed into the tightening position of the member to be tightened.
In addition, the bolt tightening device is configured so that the bolt tightening machine can freely rotate around the tightening pin.

``Operation'' When the socket of the bolt tightening machine of the bolt tightening device configured as described above is fitted to the bolt or nut screwed into the tightening position of the member to be tightened, the bolt or nut is tightened. , a reaction force acts on the bolt tightening machine, but the bolt tightening machine is rotatably tightened to the support base via the mounting pin, and the axis of the mounting pin is an extension of the axis of the socket of the bolt tightening machine. The bolt tightening machine rotates in the opposite direction to the tightening direction of bolts and nuts due to the reaction force, and the reaction force receiver provided on the bolt tightening machine
If a reaction force is applied to a member to be tightened or another protrusion fixed to a workbench or other protrusion, the reaction force will not be applied to the support base. be able to. In addition, the axis of the mounting pin is arranged to be an extension of the axis of the socket of the bolt tightening machine, so even if the socket is hidden behind the member to be tightened, it can be easily accessed from the position of the mounting pin. can be confirmed.

"Embodiment" An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a cross-sectional front view of essential parts of a bolt fastening device according to an embodiment of the present invention, FIG. 2 is a view taken in the direction of the arrow in FIG. 1,
FIG. 3 is a view taken along the arrows in FIG.

In the figure, a bolt tightening device 1 includes a bolt tightening machine 2 and a mounting arm 3 to which this bolt tightening machine 2 is attached.
The mounting arm 3 is rotatably mounted via the mounting pin 4, and rotates around the axis of the cylindrical members 5, 6 to be tightened (the member 6 to be tightened is fixed to a workbench, etc.). It has a support base 7 which is rotatable and movable in the radial direction of the upper surface of the member to be tightened 5, and has a mounting pin 4.
The axis of the socket 10 of the bolt tightening machine 2 is located on an extension of the axis of the socket 10 of the bolt tightening machine 2. and,
The bolt tightening machine 2 engages a drive unit 9 having an output shaft 8 driven via a prime mover, a speed reduction mechanism, etc. (not shown), and bolts and nuts to be tightened.
A socket 10 whose axis is parallel to the axis of the output shaft 8 of the drive section 9 connects the output shaft 8 of the drive section 9 and the socket 10, transmits power from the drive section 9 to the socket 10, and connects the socket 10 with the output shaft 8 of the drive section 9. freely rotate,
and a power transmission unit moving device 12 (hereinafter referred to as a moving device 12) that supports the power transmission unit 11 so as to be movable in the axial direction of the output shaft 8 of the drive unit 9 )
and a reaction force receiver 13 provided on the power transmission section 11 near the socket 10. In this embodiment, the power transmission section 11 uses a gear mechanism. That is, the power transmission section 11 is installed in the gear box 14 via a bearing, and includes a drive gear 15, an intermediate gear 16, and a driven gear 17 that mesh with each other. And the drive gear 15 is
It is fitted onto the output shaft 8 of the drive section 9 via a spline or a feather key, and can rotate together with the output shaft 8 and move in the axial direction of the output shaft 8. Further, the driven gear 17 is fitted into the socket 10 via a spline or a feather key, etc., and transmits power from the drive section 9 to the socket 10.
can be moved in its axial direction via the buffer spring 18.

In addition, the power transmission section 11 can be configured with a belt mechanism, a chain mechanism, etc. in addition to a gear mechanism.
Alternatively, it is obvious that a gear mechanism, a belt mechanism, and a chain mechanism can be arbitrarily combined. The moving device 12 is attached to the mounting arm 3 together with the drive section 9, and includes two air cylinders 1.
9, 19' The tips of the piston rods 20, 20' are attached to a mounting plate 21 fixed to the upper surface of the gear box 14 of the power transmission section 11 via screws or the like. And air cylinder 19,1
9' at the same time, piston rods 20,
20' by extending and contracting it via pistons (not shown) in the cylinder tubes 22, 22'.
The power transmission section 11 can be moved in the axial direction of the output shaft 8 of the drive section 9 via the drive gear 15 of the power transmission section 11 . In addition, air cylinder 1
It is obvious that a hydraulic cylinder may be used in place of 9, 19'.

Next, the operation of the bolt fastening device 1 having the above configuration will be explained.

First, the socket 10 of the bolt tightening machine 2 attaches the bolt 23 screwed to the tightening position of the members 5 and 6 to be tightened.
The support stand 7 is operated to move the bolt tightening machine 2 so that the bolt tightening machine 2 can be fitted into the bolt, and the working position of the bolt tightening machine 2 is determined. Next, when the drive section 9 of the bolt tightening machine 2 is operated, the power of the drive section 9 is transmitted from the output shaft 8 to the socket 10 via the drive gear 15, intermediate gear 16, and driven gear 17 of the power transmission section 11. , the socket 10 begins to rotate. At the same time, the air cylinders 19, 19' of the moving device 12
When the power transmission section 11 is moved close to the bolt 23 along the axis of the output shaft 8 of the drive section 9, the socket 10 rotates and fits into the head of the bolt 23, causing the bolt 23 to rotate. When the head of the bolt 23 comes into contact with the surface of the member to be tightened 6 and the tightening torque applied to the bolt 23 increases, the reaction force acts on the bolt tightening machine 2; The bolt tightening machine 2 is rotatably mounted on the support base 7 via the mounting arm 3 and the mounting pin 4, and the axis of the mounting pin 4 is on the extension of the axis of the socket 10. , the bolt 23 rotates in the opposite direction to the rotation direction of the bolt 23 due to the reaction force, the reaction force receiver 13 provided in the power transmission section 11 comes into contact with the member to be tightened 6, and the reaction force is not applied to the support base 7. do not have. When the tightening of the bolt 23 is completed in this way, the moving device 12 moves the power transmission section 11
, in the direction in which the socket 10 separates from the head of the bolt 23, and the socket 10 and bolt 23 are separated.
The bolt tightening machine 2 is moved to the tightening position of the next bolt 23' by releasing the fitting of the head of the bolt 23' and rotating the support base 7 around the axes of the members 5 and 6 to be tightened. Bolt 23' is tightened in the same manner as bolt 23. In this case, the socket 10 of the bolt tightening machine 2
Since the axis of the mounting pin 4 is placed on the extension of the axis of the mounting pin 4, even if the socket 10 is hidden behind a member to be tightened and cannot be seen, the position of the socket 10 can be easily confirmed from the position of the mounting pin 4. can do.

"Effects of the Invention" As described above, the bolt tightening device of the present invention is such that a bolt tightening machine provided with a reaction force receiver is rotatably mounted on a support base via a mounting arm and a mounting pin. The axis of the socket is placed on the extension of the axis of the socket of the bolt tightening machine, so when the bolt tightening machine tightens the bolt or nut, the reaction force causes the bolt tightening machine to tighten the bolt or nut. It rotates in the opposite direction to the mounting direction, and the reaction force can be received by the member to be tightened or other protrusions fixed to the workbench etc. using the reaction force receiver, so that the reaction force is not applied to the support stand. do not have. Therefore, even if the relative position of the bolt tightening machine and the member to be tightened shifts, or even if the support stand is attached to the member to be tightened, a reaction force will be applied to the member to be tightened through the support stand, causing damage to the member to be tightened. It does not cause harmful effects such as deforming the tightening member. Also,
Even if the socket is hidden behind a member to be tightened and cannot be seen, the position of the socket can be easily confirmed from the position of the mounting pin. There is no need to check whether the bolts and nuts that should be tightened can be fitted together, which can greatly save labor and time in bolt tightening work, and therefore work efficiency can be significantly improved. have

[Brief explanation of drawings]

FIG. 1 is a sectional front view of essential parts of an embodiment of the present invention;
2 is a view in the direction of the arrow in FIG. 1, and FIG. 3 is a view in the direction of the arrow in FIG. 1... Bolt fastening device, 2... Bolt tightening machine,
3... Mounting arm, 4... Mounting pin, 5, 6... Member to be tightened, 7... Support stand, 8... Output shaft, 9... Drive unit, 10... Socket, 11... Power transmission Department,
12...Power transmission unit moving device, 13...Reaction force receiver.

Claims (1)

[Claims] 1. A drive unit having an output shaft driven by a prime mover, a speed reduction mechanism, etc., and a socket whose axis is arranged parallel to the axis of the output shaft of the drive unit so that it can be fitted with a bolt or nut to be tightened. a power transmission section that connects the output shaft of the drive section and the socket, transmits power from the drive section to the socket, and supports the socket rotatably and movably in the axial direction; A bolt tightening machine comprising a power transmission unit moving device that supports a power transmission unit movably in the axial direction of the output shaft of the drive unit, and a reaction force receiver provided on the power transmission unit; A mounting arm to which the machine is attached; this mounting arm is attached via a mounting pin, and the bolt tightening machine is attached to the mounting arm;
A support base that supports the socket movably so as to be able to fit into a bolt or nut screwed into a tightening position of a member to be tightened, and rotatably supported around the mounting pin via the mounting arm. A bolt fastening device, characterized in that the mounting pin is arranged so that the axis of the mounting pin is on an extension of the axis of the socket of the bolt tightening machine.