JPH09308917A - Device for adjusting bending angle of metallic plate bending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bend a material to be worked at an arbitrary angle and to bending work is executable at an arbitrary place without biasing on the side of the operating part provided on the side part of a machine as in the conventional machine by exactely executing fine adjustment in stop position of descent of an upper edge of a metallic plate bending machine. SOLUTION: A light shielding plate 24 is attached to an upper edge beam 4 which is vertically moved in front of the machine 1 in the lower part of which the upper edge 5 is attached. An optical sensor 30 with which the light shielding plate 24 is sensed and the descent of the upper edge 4 is stopped is provided to a sensor mounting base which is screwed to a ball screw which is rotated with a servo motor 25 provided on the machine 1. A movable control panel 37 for driving the servo motor 25 is provided in front of the machine l.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending angle adjusting device for a metal plate bending machine for bending a metal plate such as a tin plate or a galvanized iron sheet used as a roof plate, an outer wall or the like at an arbitrary angle. .

[0002]

2. Description of the Related Art A conventional bending angle adjuster for a metal plate bending machine is an upper blade beam having an eccentric cam 42 on a drive shaft 41 and an upper blade 47 on an arm 43 of the eccentric cam 42 as shown in FIG. A dog 48 is connected to be movable up and down, a dog 44 is fixed to one end of the drive shaft 41, and a limit switch 45 contacting the dog 44 is installed on a gear 46 loosely fitted on the outer periphery of the drive shaft 41. The gear 46 rotates forward and backward by the meshing worm gear 49 to change the position (angle) of the limit switch 45, and the worm gear 49 is driven by the angle adjusting dial 51 via the pulley 50. Therefore, when the dog 44 rotates and comes into contact with the limit switch 45, the drive shaft 41 stops, the lowering of the upper blade beam 48 stops, and the lowering stop position of the upper blade 47 is determined.

The operation of the bending angle adjusting device of the conventional metal plate bending machine having the above-mentioned structure is as follows.
Although it is bent by being pressed against the descending upper blade, the bending angle is bent more sharply as the upper blade approaches the lower blade. Therefore, the bending angle can be adjusted by adjusting the lowering stop position of the upper blade. Therefore, conventionally, the angle of the limit switch 45 provided on the side of the machine body is changed in the circumferential direction by the angle adjusting dial 51. , Limit switch 4
The contact angle between 5 and the dog 44 was changed.

[0004]

The adjustment of the lowering stop position of the upper blade by the conventional bending angle adjusting device of the metal plate folding machine is limited by the manual dial as described above. It was done by changing the angle of the switch, but the distance in the circumferential direction does not directly become the distance in the up and down direction of the upper blade, so after adjusting there, you must first make a bend and check the bending angle. I had to do it. The adjustment by such a bending machine is inaccurate, and it is very difficult to bend the work material at the same angle as the previous time at the time of the next bending, which often results in an uneven product.

Further, even when the angle of the limit switch is changed, since the adjustment is done by a manual dial, the accuracy is insufficient. Furthermore, since the limit switch operation unit is installed on the side of the machine body, the operator operates the operation unit side operation machine side of the machine body so that it is easy to operate, and thus the operator can operate the limit switch, for example, with a length of 6 m. Even with a folding machine having the ability to bend the work material up to that point, it is usually 1 to 2
Since most of the short materials of m are machined, the work place is deviated, and the upper blade and the lower blade near the operating portion are worn out severely.

In view of the above points, the present invention makes it possible to bend the work piece at an arbitrary angle by adjusting the lowering stop position of the upper blade of the metal plate bending machine accurately, and also the working point. An object of the present invention is to provide a bending angle adjusting device for a metal plate bending machine capable of bending a work piece at an arbitrary position without deviation.

[0007]

In order to solve the above-mentioned problems, according to the present invention, an upper blade is attached to a lower portion, and a light shielding plate is attached to an upper blade beam that moves up and down on the front surface of a machine body. An optical sensor for stopping the lowering of the upper blade beam is provided on the machine body so as to be able to move up and down.

According to the present invention having the above-mentioned structure, the lowering of the upper blade beam is stopped when the light sensor detects the light shielding plate, and the workpiece is bent by the upper blade at the stop position. Therefore, in order to set the bending angle of the work material, it is sufficient to adjust the position of the optical sensor to adjust the lowering stop position of the upper blade beam.
Since the optical sensor moves up and down vertically, the moving distance of the optical sensor becomes the moving distance of the upper blade beam as it is, and the adjustment is accurate and easy.

The present invention is also characterized in that a sensor mount is screwed up and down with a ball screw connected to a servomotor. Therefore, in the present invention, the optical sensor is moved up and down by the servo motor, so that accurate and fine adjustment is possible.

The present invention is also characterized by having a movable operation panel for driving a servomotor.
Therefore, according to the present invention, since the operation panel can be moved to a place where bending work can be easily performed, it is possible to prevent deviation of the work place, and there is no fear of partial wear of the blade portion.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an embodiment of a bending angle adjusting device for a metal plate folding machine of the present invention, FIG. 2 is a front view of the same as above, FIG. 3 is a plan view of the same as above, and FIG. FIG. 5 is a partial vertical rear view of the above, and FIG. 6 is a side view of a conventional bending angle adjusting device for a metal plate folding machine.

1 is a metal plate bending machine,
A lower blade beam 2 extending in the left-right direction of the aircraft 1 is fixed to the lower front portion of the aircraft 1, and a lower blade beam 2 is provided above the lower blade beam 2.
The lower blade 3 is fixed upwards over the entire length of the. Lower blade 3
The upper blade 5 is fixed to the lower part of the upper blade beam 4 extending in the left-right direction of the front of the machine body 1 from above from the upper side over the entire length of the upper blade beam 4.

A drive shaft 6 is provided above the upper blade beam 4 in the left-right direction in front of the machine body 1 in parallel with the upper blade beam 4.
An eccentric disc 7 is fixed to the drive shaft 6 at several places, and an arm 8 is integrally formed with the eccentric disc 7 downward on the lower portion of the eccentric disc 7. Then, the upper blade beam 4 corresponding to the lower part of the arm 8
The bracket 9 is fixed to the upper position of the bracket by the bolt 10, and the arm 8 and the bracket 9 are rotatably supported by the shaft 11.

Further, partition walls 12 are provided at regular intervals in the left-right direction on the front of the machine body 1, and guide plates 14 having two vertically elongated slots 13 are fixed to the partition walls 12. Bolts 15 provided above and below the rear surface of the upper blade beam 4 are engaged with the guide plate 14. Therefore, the rotation of the drive shaft 6 causes the arm 8 integrated with the eccentric disc 7 to move up and down.
The upper blade beam 4 connected to the
Since it moves by engaging with the elongated hole 13, it can smoothly move up and down.

Reference numeral 16 denotes a drive motor capable of rotating in the forward and reverse directions. A pulley 17 is provided on the shaft of the drive motor 16,
A belt 20 is hung between the pulley 17 and a pulley 19 provided on an auxiliary drive shaft 18 provided in parallel with the drive shaft 6,
The rotation of the drive motor 16 is transmitted to the auxiliary drive shaft 18.

The auxiliary drive shaft 18 is provided with a gear 21 and the drive shaft 6 is provided with a gear 22. The auxiliary drive shaft 18 is rotated by an intermediate gear 23 provided on the partition wall 12 from the gear 21. And the drive shaft 6 is rotated.

A light shielding plate 24 is fixed above the rear surface of the upper blade beam 4 near the side of the body 1. Reference numeral 25 denotes a side portion of the machine body 1, which is a servo motor mounted downward on a plate 26 fixed at a position facing the light shielding plate 24. A ball screw 28 is vertically connected to the servo motor 25 via a coupling 27. ing.

Reference numeral 29 denotes a sensor mount which is screwed to the ball screw 28 and moves up and down the ball screw 28. An optical sensor 30 for sensing the light shielding plate 24 is provided on the sensor mount 29. The rear side of the sensor mount 29 is inserted through a guide rod 31 provided in the up-down direction of the plate 26.

Therefore, when the optical sensor 30 senses the light shielding plate 24, the rotation of the driving motor 16 is stopped and the upper blade beam 4 is stopped from descending. At this position, the work material 32 such as tin plate or galvanized iron is bent. Then, the work material 32
When changing the bending angle of, the servo motor 25 is rotated, and when the bending angle is approached to an acute angle, the position of the optical sensor 30 is lowered from the current position so that the upper blade 5 is closer to the lower blade 3, When the bending angle is close to the obtuse angle, the position of the optical sensor 30 can be raised and adjusted so that the upper blade 5 is separated from the lower blade 3. A reference plate 33 may be provided for the adjustment, and the vertical distance may be measured with this as a reference. 34
Is a limit switch that regulates the upper limit of movement of the optical sensor 30, and 35 is a limit switch that regulates the lower limit of movement of the optical sensor 30.

Reference numeral 36 denotes a rail provided on the upper front surface of the machine body 1 so as to extend in the left-right direction of the front surface of the machine body 1, and an operation panel 37 can be laterally moved by a car 38 that holds the rail 36 from above and below the rail 36. Has become. The servo motor 25 is rotated by a pulse signal from the operation panel 37 to control the position of the optical sensor 30. The operation panel 37 does not necessarily need to be attached to the machine body 1, and may be a remote place. In addition, 39 in the figure
Is a work material receiving and elevating device.

[0021]

According to the present invention, when the bending angle of a metal plate such as tin plate or galvanized iron is adjusted, the movement of the optical sensor is vertical ascending / descending. Unlike the above, the moving distance of the optical sensor is the same as the moving distance of the upper blade, and the adjustment is easy and very accurate measurement is possible. Further, since the optical sensor is moved up and down by the servo motor, fine adjustment is possible. Also, since the operation panel that drives the servomotor can be moved, it is possible to move to a location where bending work is easy, and work can be prevented, so deviation of the work location can be prevented and partial wear of the blade can be prevented. It is a useful invention that can significantly improve work efficiency.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a device of the present invention.

FIG. 2 is a front view showing an embodiment of the device of the present invention.

FIG. 3 is a plan view showing an embodiment of the device of the present invention.

FIG. 4 is a partially enlarged side view showing an embodiment of the device of the present invention.

FIG. 5 is a partial vertical rear view showing an embodiment of the device of the present invention.

FIG. 6 is a side view of a conventional device.

[Explanation of symbols]

 1 Airframe 4 Upper blade beam 5 Upper blade 24 Light-shielding plate 25 Servo motor 28 Ball screw 29 Sensor mount 30 Optical sensor 37 Operation panel

Claims (3)

[Claims] 1. An upper blade is attached to a lower portion, and a light shielding plate is attached to an upper blade beam that moves up and down in front of the machine body. An optical sensor that senses the light shielding plate and stops the lowering of the upper blade beam can be moved up and down. A bending angle adjusting device for a metal plate bending machine, which is provided on the machine body. 2. The bending angle adjusting device for a metal plate bending machine according to claim 1, wherein a sensor mounting base is screwed up and down with a ball screw connected to the servomotor. 3. The bending angle adjusting device for a metal plate bending machine according to claim 2, further comprising a movable operation panel for driving a servo motor.