JPH10166277A - Fastening auxiliary device for thread fastening machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stablize the location of a thread fastening machine for a thread fastening portion by providing a guide means guiding the tip of the thread fastening machine to the thread fastening portion by performing a fixed directing. SOLUTION: By a height adjusting screw 16, the height of a base 18, that is, the height of a horizontal direction adjusting guide means 14, in other words, the height of the tip of a thread fastening machine 7 is set to a prescribed height. The tip of the thread fastening machine 7 is manually aligned to a thread fastening portion. At this time, a left and right moving base 20 is moved in the left and right along a left and right moving guide 21 in the left and right directions and a back and forth moving square bar 29 is moved back and forth along a back and forth moving guide 22 provided on the left and right moving base 20 in the back and forth directions. The tip of the thread fastening machine 7 is aligned to the thread fastening portion by performing a fine adjustment by revolution of a rotary shaft 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw tightening device for guiding a screw tightening machine in a predetermined direction.

[0002]

2. Description of the Related Art Conventionally, a tightening assisting device for a screw tightening machine of this kind has been configured as shown in FIG. Less than,
The configuration will be described.

[0003] As shown in the figure, a screw tightening machine 1 such as an air screwdriver or an electric screwdriver is provided with a helical spring 5 hung by a hanging string 2 and hooked on a pulley 4 movably attached to a hanger rail 3. The hanging string 2 was hung on the wire 6.

In the above configuration, when the screw is tightened to a predetermined position by the screw tightening machine 1, the pulley 4 is moved along the hanger rail 3 in the horizontal direction while the screw tightening machine 1 is held. By pulling the wire 1 downward, the wire 6 is extended against the spring force of the helical spring 5, and the tip of the screw tightening machine 1 is set at a predetermined position to tighten the screw. When the screw tightening machine 1 is released, the helical spring 5
It returns to almost the original position by the spring force of.

[0005]

In such a conventional structure, a pulley 4 movably mounted on a hanger rail 3 is provided.
In order to move the screw in the horizontal direction, a large force is required for the movement in the horizontal direction. In addition, since the screw tightening machine 1 is suspended by the wire 6 of the helical spring 5 and the suspension string 2, the screw is tightened. Later, when the screw tightening machine 1 is released, it swings largely in the horizontal and vertical directions, and the tip of the screw tightening machine 1 hits the product to be screwed, causing a problem that the product is damaged. Was.

Further, since the screw tightening machine 1 is suspended by the wire 6 of the helical spring 5 and the suspending string 2, the screw tightening machine 1, the suspending string 2, the wire 6 and the like obstruct the other work. Had the problem of becoming

Further, since the screw tightening machine 1 is not fixed, it is difficult to position the screw tightening machine, and at the time of screw tightening, the tip of the screw tightening machine 1 is slipped, and the product is damaged. When tightening, use a screw tightening machine 1
Has to be supported by hand, which poses a problem that a burden is placed on the hand.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and lightens the movement of a screw tightening machine to a screw tightening position, stabilizes the position of the screw tightening machine with respect to the screw tightening position, and facilitates the tightening position adjusting operation. It is intended to improve tightening workability.

[0009]

In order to achieve the above object, the present invention is provided with a guide means for guiding the tip of a screw tightening machine in a fixed direction with respect to a screw tightening point. .

[0010] Thus, the movement of the screw tightening machine to the screw tightening position is lightened, the position of the screw tightening machine with respect to the screw tightening position is stabilized, the tightening position adjusting operation is facilitated, and the tightening workability is improved. be able to.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is provided with guide means for guiding the tip of a screw tightening machine in a fixed direction with respect to a screw tightening point, The guide means can lighten the movement of the screw tightening machine to the screw tightening location, and can stabilize the position of the screw tightening machine with respect to the screw tightening location, thereby facilitating the tightening position adjustment work and improving the tightening workability. be able to.

According to a second aspect of the present invention, in the first aspect of the present invention, the guide means comprises a vertical adjustment guide means and a horizontal adjustment guide means. It can be freely guided in up, down, front and back, left and right directions, and even when tightening vertically with a screw tightening machine or horizontally, the tip of the screw tightening machine can be moved lightly to the screw tightening place Thus, the position of the screw tightening machine with respect to the screw tightening location can be stabilized.

According to a third aspect of the present invention, in the second aspect of the present invention, the vertical adjustment guide means or the horizontal adjustment guide means also serves as an advance / retreat guide means for tightening a screw. Move the tip of the tightening machine up and down, back and forth, left and right, guide it to the screw tightening point, and operate the screw tightening machine in that state, along the vertical adjustment guide means or the horizontal adjustment guide means, By moving the screw tightening machine up and down, back and forth or left and right, the screw can be tightened,
After the screw tightening is completed, the screw tightening machine can be moved in the direction opposite to the screw tightening direction to complete the screw tightening work. In addition, there is no need to manually support the screw tightening machine, so that the burden on the hands is eliminated.

According to a fourth aspect of the present invention, in the second aspect of the present invention, the horizontal direction adjusting guide means comprises a rotation guide means and an advance / retreat guide means for tightening a screw. The guide means can lightly move the tip of the screw tightening machine to the screw tightening point, and can stabilize the position of the screw tightening machine with respect to the screw tightening point, so that the screw can be securely tightened by the reciprocating guide means. it can.

According to a fifth aspect of the present invention, in the third or fourth aspect of the present invention, the advancing / retreating guide means is configured such that when the hand is released, the tip of the screw tightening machine is retracted from the screw tightening location. After the screw tightening is completed, the screw tightening machine can be automatically moved in the direction opposite to the screw tightening direction, so that the tip of the screw tightening machine does not damage the product.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the screw tightening machine is attached to the guide means in a swingable state, and the screw tightening machine mounted on the guide means. Can be finely adjusted manually with respect to the screw tightening location, and the tip of the screw tightening machine can be surely matched with the screw tightening location.

[0017]

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

(Embodiment 1) As shown in FIG. 1, a screw tightening machine 7 is driven by compressed air, and operates by grasping and pressing a tightening lever 8. The screw tightening machine 7 is fixed to a holder 9, and the holder 9 is fixed to a rotating shaft 10. The rotating shaft 10 includes a rotating bearing 11
A stopper (not shown) is provided below the rotary bearing 11 to restrict the rotation angle of the rotary shaft 10 to about 15 degrees, and the screw tightening machine 7 is mounted in a swingable state.

The guide means 12 guides the distal end of the screw tightening machine 7 in a fixed direction with respect to the screw tightening point, and comprises a vertical adjusting guide means 13 and a horizontal adjusting guide means 14. The vertical adjustment guide means 13 is provided with a height adjustment part 17 which can be adjusted in height by a height adjustment screw 16 on the support base 15 so as to adjust the height of the horizontal adjustment guide means 14.

The horizontal adjusting guide 14 has a left-right moving square rod 19 fixed to a base 18 supported by a height adjusting screw 16 and a height adjusting section 17, and the left-right moving square rod 19 is moved left and right. A left-right moving guide 21 to which the base 20 is fixed is mounted to make the left-right moving base 20 freely movable in the left-right direction. The front-rear moving base 23 is integrated with the front-rear moving square guide 22 provided on the left-right moving base 20. The provided longitudinally movable square bar 24 is attached, and the longitudinally movable base 23 is configured to be movable in the longitudinal direction. Back and forth movement base 2
The rotating bearing 11 is fixed to the reference numeral 3.

The operation of the above configuration will be described. The height of the base 18, in other words, the height of the tip of the screw tightening machine 7 is set to a predetermined height by the height adjusting screw 16, and the screw tightening machine is manually operated. Align the tip of 7 with the screw tightening point. At this time, the left-right moving base 20 is moved left and right along the left-right moving guide 21 in the left-right direction, and the front-rear moving square rod 24 is moved forward and backward along the front-rear moving guide 22 provided on the left-right moving base 20 in the front-rear direction. It is moved and finely adjusted by the rotation of the rotating shaft 10 to adjust the tip of the screw tightening machine 7 to the screw tightening position.

After the tip of the screw tightening machine 7 is adjusted to the screw tightening position, when the tightening lever 8 is grasped and pressed, compressed air is supplied and the screw tightening machine 7 starts operating. At the same time that the screw tightening machine 7 starts operating,
The screw tightening machine 7 can be advanced by the forward and backward moving square rod 24 along the front and rear moving guide 22 to tighten the screw. After the screw tightening is completed, the screw tightening machine 7 is moved in the direction opposite to the screw tightening direction. It can be moved to complete the screw tightening operation.

As described above, according to this embodiment, the tip of the screw tightening machine 7 is guided by the guide means 12 in a fixed direction with respect to the screw tightening point. The movement to the screw tightening position can be lightened, the position of the screw tightening machine 7 can be stabilized with respect to the screw tightening position, and the tightening work can be facilitated and the tightening workability can be improved.

At the same time as the operation of the screw tightening machine 7 is started, the screw tightening machine 7 is moved forward along the longitudinal movement guide 22 through the square rod 24 for forward and backward movement to tighten the screw. The forward and backward moving square rod 24 also serves as a forward / backward guide means for tightening the screw. Therefore, the tip of the screw tightening machine 7 is guided to the screw tightening point, and the screw tightening machine is operated while the screw tightening machine is operated in this state. The screw can be tightened by moving the screwing machine 7, and after the screw tightening is completed, the screw tightening machine 7 can be moved in a direction opposite to the screw tightening direction to end the screw tightening work. The tip of the screw tightening machine 7 does not slide, so that it is not necessary to support the screw tightening machine 7 by hand at the time of tightening, so that no burden is placed on the hand.

Although not shown in FIG. 1, the front-rear movement guide 22 is inclined so that the distal end side of the screw tightening machine 7 is raised, so that the screw tightening machine 7 is automatically turned on after the screw tightening is completed. It can be moved in the direction opposite to the screw tightening direction, so that the tip of the screw tightening machine 7 does not damage the product.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and the description is omitted.

As shown in FIG. 2, the screw tightening machine 7
It is fixed to a holder 24, and this holder 24 is mounted on a horizontally moving square bar 25. Rotation bearing 27 on base 26
The rotary plate 28 is rotatably inserted into the rotary bearing 27, and the horizontal moving square bar 25 is attached to the horizontal moving guide 29 fixed to the rotating plate 28, and the horizontal moving square bar 25 is moved. It is free and constitutes a rotation guide means.

Further, the tightening cylinder 30 enables the base 26 to move downward during screw tightening.
By moving the screw tightening machine 6 downward, the screw tightening machine 7 is moved downward to tighten the screws, and constitutes a reciprocating guide means of the screw tightening machine 7. The rotation guide means and the forward / backward guide means constitute a horizontal direction adjustment guide means 31.

The tightening cylinder 30 is operated by the output of a pressure sensor (not shown) for detecting the pressure of the compressed air supplied to the screw tightening machine 7, and the pressure of the compressed air is reduced when the screw tightening machine 7 is operated. Accordingly, the screw tightening machine 7 is lowered via the base 26 by its own weight, instead of the operation by the compressed air, so that the screw is tightened.

The rotary plate positioning cylinder 32 fixes the rotary plate 28 at a predetermined position by pressing a stopper 33 made of an electromagnetic magnet or rubber against the rotary plate 28 by air pressure. Horizontally moving square rod position sensor for detecting the position, rotary plate position sensor for detecting the position of the rotary plate 28, and the tightening cylinder 3
The operation is controlled by a tightening cylinder sensor (neither is shown) for detecting the operation of zero.

The spring 33 is a spring for returning the rotary plate 28, and the spring 34 is a spring for finely adjusting the position of the screw tightening machine 7 up and down.

The operation of the above configuration will be described. In the initial state, the horizontal movement square bar 25 is pushed to the right side in FIG. 2 along the horizontal movement guide 29, and the rotary plate positioning cylinder 32 is provided with a stopper 33. Is pressed against the rotating plate 28 to fix the rotating plate 28 at a predetermined position.
From this state, the horizontal moving square rod 25 is moved to the horizontal moving guide 29.
When the screw tightening machine 7 is moved to the vicinity of the screw tightening position, the rotation plate positioning cylinder 32 is operated by the output of the horizontal movement square rod position sensor, and the stopper 33 is separated from the rotation plate 28. For this reason, the rotating plate 28
Is rotatable so that the screw tightening machine 7 can be moved to the screw tightening position.

The rotation plate 28 is moved by the movement of the screw tightening machine 7.
Is rotated, and the position of the screw tightening machine 7 is finely adjusted vertically by the spring 34 to adjust the tip of the screw tightening machine 7 to the screw tightening position.
The rotary plate positioning cylinder 32 operates and the stopper 33
Is pressed against the rotating plate 28 to fix the rotating plate 28.

When the tip of the screw tightening machine 7 is aligned with the screw tightening position and the tightening lever 8 is gripped and pressed,
The compressed air is supplied and the screw tightening machine 7 starts operating. Since the air pressure of the compressed air is reduced by the start of the operation of the screw tightening machine 7, the change in the air pressure is detected by the pressure sensor, and the tightening cylinder 30 is not operated by the compressed air but through the base 26 by its own weight. The screw tightening machine 7 is lowered to tighten the screws.

If the rotation of the screw tightening machine 7 is stopped at the same time as the screw tightening confirmation, the air pressure of the compressed air rises due to the stop of the screw tightening machine 7. This change in air pressure is detected by a pressure sensor, and the tightening cylinder is detected. 30
Is operated by compressed air to raise the screw tightening machine 7. When the operation of the tightening cylinder 30 is detected by the tightening cylinder sensor and the screw tightening machine 7 is raised, the rotary plate positioning cylinder 32 separates the stopper 33 from the rotary plate 28. Therefore, the rotating plate 28 is rotatable, and the rotating plate 28 is returned by the spring 33 to return the screw tightening machine 7 to the original position.

Next, by pushing the screw tightening machine 7 and pushing the horizontal movement square rod 25 rightward along the horizontal movement guide 29, the output of the horizontal movement square rod position sensor causes the rotary plate positioning cylinder 32 to The stopper 33 is pressed against the rotating plate 28 to fix the rotating plate 28 at a predetermined position,
Return to the initial state. Hereinafter, this operation is repeated.

As described above, according to the present embodiment, the tip of the screw tightening machine 7 is guided in a certain direction with respect to the screw tightening position by the horizontally moving square rod 25 and the rotating plate 28. As a result, the movement of the screw tightening machine 7 to the screw tightening position can be lightened, the position of the screw tightening machine 7 can be stabilized with respect to the screw tightening position, and the tightening work can be easily performed. Performance can be improved.

At the same time as the operation of the screw tightening machine 7 is started, the tightening cylinder 30 is not operated by the compressed air but by its own weight via the base 26.
Is lowered to tighten the screw. After the screw tightening is completed, the screw tightening machine 7 can be moved in the direction opposite to the screw tightening direction to end the screw tightening operation. Since the tip does not slip, the product to be screwed is not damaged, and the screw tightening machine 7 does not need to be supported by hand at the time of tightening, so that no burden is imposed on the hand.

[0039]

As described above, according to the first aspect of the present invention, the guide means is provided for guiding the tip of the screw tightening machine in a fixed direction with respect to the screw tightening point. The guide means can lighten the movement of the screw tightening machine to the screw tightening position, stabilize the position of the screw tightening machine with respect to the screw tightening position, and slide the tip of the screw tightening machine when tightening the screw. Since there is no need to damage the product to be screwed, the tightening position adjustment work can be facilitated and the tightening workability can be improved.

According to the second aspect of the present invention, since the guide means comprises the vertical adjustment guide means and the horizontal adjustment guide means, the tip of the screw tightening machine can be moved in the up, down, front, back, left and right directions. Can be guided freely,
Even when tightening up and down with a screw tightening machine,
Even when tightening in the horizontal direction, the tip of the screw tightening machine can be moved lightly to the screw tightening location, and the position of the screw tightening machine can be stabilized with respect to the screw tightening location.

According to the third aspect of the present invention, since the vertical adjustment guide means or the horizontal adjustment guide means also serves as the forward / backward guide means for tightening the screw, the tip of the screw tightening machine is moved up and down, back and forth. By moving the screw tightening machine along the vertical adjustment guide means or the horizontal adjustment guide means while moving the screw tightening machine in each of the left and right directions and guiding it to the screw tightening point, and operating the screw tightening machine in that state The screw can be tightened, and after the screw has been tightened, the screw tightening machine can be moved in the direction opposite to the screw tightening direction to complete the screw tightening work. When tightening the screw, slide the tip of the screw tightening machine. When tightening, there is no need to manually support the screw tightening machine, so that a burden is not placed on the hand.

According to the fourth aspect of the present invention, since the horizontal adjustment guide means is composed of the rotation guide means and the forward / backward guide means for tightening the screw, the tip of the screw tightening machine is rotated by the rotation guide means. Can be moved lightly to the screw tightening point, and the position of the screw tightening machine can be stabilized with respect to the screw tightening point.
The screw can be securely tightened by the forward / backward guide means.

According to the fifth aspect of the present invention, the advancing / retreating guide means is configured so that when the hand is released, the tip of the screw tightening machine is retracted from the screw tightening location. The screw tightening machine can be automatically moved in the direction opposite to the screw tightening direction, so that the end of the screw tightening machine does not damage the product.

According to the sixth aspect of the present invention, since the screw tightening machine is attached to the guide means in a swingable state, the tip of the screw tightening machine mounted on the guide means is fixed to the screw tightening position. Fine adjustment can be made manually, and the tip of the screw tightening machine can be surely matched with the screw tightening position.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tightening assisting device of a screw tightening machine according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view of a tightening assisting device of a screw tightening machine according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a tightening assisting device of a conventional screw tightening machine.

[Explanation of symbols]

 7 Screw tightening machine 12 Guide means

Claims (6)

[Claims] 1. A tightening assisting device for a screw tightening machine comprising a guide means for guiding a tip of the screw tightening machine in a predetermined direction with respect to a screw tightening point. 2. A tightening assisting device for a screw tightening machine according to claim 1, wherein the guide means comprises a vertical adjusting guide means and a horizontal adjusting guide means. 3. A tightening assisting device for a screw tightening machine according to claim 2, wherein the vertical adjusting guide means or the horizontal adjusting guide means also serves as an advancing / retreating guide means for tightening the screw. 4. The tightening assisting device for a screw tightening machine according to claim 2, wherein the horizontal direction adjusting guide means comprises a rotation guide means and an advance / retreat guide means for tightening the screw. 5. The tightening assisting device for a screw tightening machine according to claim 3, wherein the advance / retreat guide means is configured so that when the hand is released, the tip of the screw tightening machine is retracted from the screw tightening position. 6. The tightening assisting device for a screw tightening machine according to claim 1, wherein the screw tightening machine is attached to the guide means in a swingable state.