JP2021045775A - Bending angle detection unit, bending angle detection system and implementation method of bending angle detection unit - Google Patents

Abstract

To reduce the occupancy rate of the press brake at assembly thereof so as to prevent man-hours from increasing, and to enable retrofitting.SOLUTION: The bending angle detection unit comprises: a pair of plate-shaped support bases extending in a state where plate surfaces are parallel to each other, and attached to a press brake; and a pair of angle detection mechanisms provided on an outer side in a facing direction of the pair of support bases, in a manner capable of being moved and positioned freely along an extending direction. The pair of support bases are arranged to face each other at an interval allowing a lower-part table of the press brake to be inserted therein, and attached to the lower-part table via fastening means.SELECTED DRAWING: Figure 1

Description

The present invention relates to a work bending angle detecting unit, a bending angle detecting system, and a method for mounting the bending angle detecting unit.

In a press brake that bends a work, for example, when a plate-shaped work is bent into a V shape by a die provided on the lower table and a punch provided on the upper table, the bending angle of the work is determined by an angle sensor. It is known that the detection is performed (see, for example, Patent Document 1 below).

This press brake is provided with angle sensors that can move and position in the left-right direction on both the front and rear sides of the lower table, thereby saving space and simplifying the overall configuration of the angle sensor, while front and rear of the lower table. The angle sensors can be individually moved and positioned in the left-right direction.

Japanese Patent No. 6167013

However, in the conventional press brake disclosed in Patent Document 1, since it is necessary to directly attach the individual parts constituting the angle sensor to the press brake, it takes a long time to occupy the press brake, and the press brake is assembled. There is a problem that man-hours increase. In addition, since the angle sensor is directly incorporated into the press brake, there is a problem that it cannot meet the needs of retrofitting.

The present invention has been made in view of the above circumstances, and is a bending angle detection unit that can reduce the occupancy rate at the time of assembling the press brake to prevent an increase in man-hours and can be retrofitted. It is an object of the present invention to provide a method of mounting a press brake and a bending angle detection unit provided.

The bending angle detection unit according to the present invention extends in a state where the plate surfaces are parallel to each other, and extends in a direction extending outward in a facing direction to a pair of plate-shaped support base portions attached to a press brake and the pair of support base portions. A pair of angle detection mechanisms are provided so as to be movable and positioned along the same direction, and the pair of support base portions are arranged so as to face each other at intervals at which a lower table of the press brake can be inserted, and fastening means are attached to the lower table. It is characterized in that it is configured so that it can be attached via.

In one embodiment of the present invention, the fastening means is composed of a screw hole formed in the head of a tightening bolt used for attaching a tightening plate to the lower table, and a mounting bolt attached to the screw hole. To.

In another embodiment of the present invention, the pair of support base portions are formed so that the extending length thereof is longer than the length in the left-right direction of the lower table.

In still another embodiment of the present invention, a connecting portion for connecting each support base portion while maintaining a parallel state is provided at an end portion in the extending direction of the pair of support base portions.

The bending angle detection system according to the present invention is a bending angle detection system including a press brake having an upper table and a lower table, and a bending angle detecting unit mounted on the press brake to detect the bending angle of a work. The bending angle detection unit extends along the extending direction to the outside of the pair of plate-shaped support bases attached to the lower table and the pair of support bases in a state of being parallel to each other. The pair of support bases are provided with a pair of angle detection mechanisms that can be freely moved and positioned, and the pair of support bases are arranged so as to face each other at intervals at which the lower table can be inserted, and are attached to the lower table via fastening means. It is characterized in that it is configured to be possible.

In one embodiment of the present invention, the press brake has a tightening bolt and a tightening nut for attaching a tightening plate to the front side and the rear side of the lower table in the front-rear direction, respectively, and the fastening means is the tightening bolt. The bending angle detection unit is composed of a screw hole formed in the head of the screw hole and a mounting bolt attached to the screw hole, and the pair of support base portions abut on the head of the tightening bolt. By being screwed by the mounting bolts screwed into the screw holes, the lower table is positioned and mounted in the front-rear direction of the lower table.

In another embodiment of the present invention, the bending angle detecting unit includes a connecting portion that connects each support base portion while maintaining a parallel state at an end portion of the pair of support base portions in the extending direction.

In still another embodiment of the present invention, the bending angle detecting unit is positioned in the left-right direction with respect to the lower table by a positioning plate detachably attached to the connecting portion.

The method for mounting the bending angle detecting unit according to the present invention is a method for mounting a bending angle detecting unit for mounting a bending angle detecting unit for detecting a bending angle of a workpiece in the press brake on a press brake having an upper table and a lower table. The bending angle detection unit extends in a state where the plate surfaces are parallel to each other, and extends outward in the opposite direction to the pair of plate-shaped support base portions attached to the lower table and the pair of support base portions. It is provided with a pair of angle detection mechanisms provided so as to be movable and positioned along a direction, and the pair of support base portions are arranged to face each other at intervals at which the lower table can be inserted, and fastening means are attached to the lower table. A pair of plates that are attached to the main frame and extend in the extending direction, and a pair of plates that are attached to the main frame and extend in a state where the plate surfaces are parallel to each other and support the pair of support base portions. Using a mounting jig having a support frame and a shipping block for connecting the pair of support frames in opposite directions, the pair of support frames are attached to the pair of support bases of the bending angle detection unit, respectively. The step of mounting, the step of transporting the bending angle detection unit to which the pair of support frames are mounted to the mounting position on the lower table together with the mounting jig, and the step of bringing the shipping block into contact with the lower table. A step of placing the mounting jig and arranging the bending angle detection unit with respect to the lower table, a step of attaching the pair of support base portions to the lower table, and the pair of support frames. Is provided with a step of removing the mounting jig from the pair of support base portions and removing the mounting jig.

In one embodiment of the present invention, the fastening means includes a screw hole formed in the head of a tightening bolt to which a tightening nut for attaching a tightening plate to the lower table is attached, and a mounting bolt attached to the screw hole. In the step of attaching the pair of support base portions, the pair of support base portions are brought into contact with the heads of the tightening bolts, and the mounting bolts are screwed into the screw holes and screwed. As a result, the bending angle detection unit is positioned and attached to the lower table in the front-rear direction of the lower table.

In another embodiment of the present invention, the tightening nut and the tightening bolt are screw-tightened / loosely attached to the lower table, and in the step of attaching the pair of support base portions, the lower table is attached. The front support base portion of the bending angle detection unit is brought into contact with the head of the front tightening bolt in the front-rear direction, and the mounting bolt is screwed into the screw hole of the tightening bolt to hold the front support base portion. After screwing, loosen the tightening bolt on the rear side in the front-rear direction of the lower table, bring its head into contact with the support base portion on the rear side of the bending angle detection unit, and insert it into the screw hole of the tightening bolt. The mounting bolts are screwed in and the support base portion on the rear side is screwed.

In still another embodiment of the present invention, after removing the mounting jig, the tightening nut attached to the tightening bolt on the rear side in the front-rear direction of the lower table is loosened to the rear side of the lower table. Further provided with a process of attaching a tightening plate.

In still another embodiment of the present invention, the main frame of the mounting jig has an extension length longer than the extension direction length of the bending angle detection unit and faces the central portion in the extension direction. In the step of having a jack receiving portion extending in one direction and transporting the mounting jig to the mounting position, an elevating mechanism and moving wheels for supporting and raising and lowering the mounting jig by both ends of the main frame and the jack receiving portion are provided. Transport with the transport jig you have.

According to the present invention, it is possible to reduce the occupancy rate at the time of assembling the press brake to prevent an increase in man-hours, and it is possible to retrofit the press brake.

It is a front view which shows the schematic structure of the press brake provided with the bending angle detection unit which constitutes the bending angle detection system which concerns on one Embodiment of this invention. It is a side view which shows the schematic structure of the press brake. It is a perspective view which shows the schematic structure of the bending angle detection unit. It is a side view which shows the schematic structure of the bending angle detection unit. FIG. 4 is a view taken along the line AA of FIG. It is a side view which shows roughly the appearance which the same bending angle detection unit was mounted on the lower table. It is a top view which shows a part of the schematic structure of the bending angle detection unit. It is a perspective view which shows the schematic structure of the mounting jig of the bending angle detection unit. It is a partial vertical sectional view for demonstrating the mounting procedure of the bending angle detection unit. It is a partial vertical sectional view for demonstrating the mounting procedure of the bending angle detection unit. It is a partial vertical sectional view for demonstrating the mounting procedure of the bending angle detection unit. It is a partial vertical sectional view for demonstrating the state of the lower table after mounting the bending angle detection unit. It is a perspective view which shows the schematic structure of the transport jig for transporting and mounting the same bending angle detection unit together with the mounting jig. It is a perspective view for demonstrating the mounting procedure of the bending angle detection unit attached to the mounting jig by the same transport jig. It is a top view for demonstrating the mounting procedure of the bending angle detection unit attached to the mounting jig by the same transport jig. FIG. 15 is an enlarged arrow view taken along line BB in FIG. It is a side view for demonstrating the mounting procedure of the bending angle detection unit attached to the mounting jig by the same transport jig.

Hereinafter, a method of mounting the bending angle detection unit, the bending angle detection system, and the bending angle detection unit according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the means for solving the invention. ..

[Bending angle detection system configuration]
FIG. 1 is a front view showing a schematic configuration of a press brake including a bending angle detecting unit constituting the bending angle detecting system according to an embodiment of the present invention, and FIG. 2 is a side view showing the schematic configuration of the press brake. It is a figure.

As shown in FIGS. 1 and 2, the bending angle detection system 1 includes a press brake 10 which is a bending machine for bending a workpiece, a bending angle detection unit 20 mounted on the press brake 10, and these press brakes. A control device (not shown) that controls the bending angle detection unit 20 and performs bending processing including detection of the bending angle of the work is provided.

Since the basic structure of the press brake 10 and the basic structure of the bending angle detection unit 20 are known, only an outline thereof will be described here except for a part requiring explanation. Further, in the following description, the "X-axis direction" means the left-right direction when facing the front of the press brake 10, and the "Y-axis direction" means the depth direction in this case, and the "Z-axis direction". Means the vertical direction in this case. Further, in the present embodiment, the scale and dimensions of each component may be exaggerated or some components may be omitted.

[Press brake configuration]
The press brake 10 of the bending angle detection system 1 is aligned in the vertical direction (Z-axis direction) so that one surface in the depth direction (Y-axis direction), for example, the outer plate surface faces the front surface in the center of the front surface. It includes an arranged lower table 11 and an upper table 12. The lower table 11 and the upper table 12 are provided on the front lower portion and the front upper portion of the support portion 13 in a state of extending long in the left-right direction (X-axis direction), respectively.

Support portions 13 are arranged on the left and right sides of the press brake 10 to support the tables 11 and 12. Further, in the present embodiment, the press brake 10 includes, for example, a drive mechanism 16 configured to reciprocate the upper table 12 with respect to the lower table 11 in the vertical direction.

The lower table 11 has a plurality of lower die holders (die holders) 14 (see FIG. 6) that are made of a plate-shaped member such as metal and that hold a lower die such as a die D having a V groove on the upper portion thereof. The upper table 12 is made of a plate-shaped member such as metal similar to the lower table 11, and a punch P (not shown) that bends a plate-shaped work (not shown) in cooperation with the die D at the lower portion thereof. ), Etc. It has an upper mold holder (not shown) that holds the upper mold.

In the present embodiment, each support portion 13 is composed of, for example, a plate-shaped side frame formed in a substantially U shape in a lateral view, but the present invention is not limited to this, and a rod-shaped tie bar or the like is used. It may be composed of. The drive mechanism 16 is, for example, a hydraulic cylinder that serves as a drive source for the upper table 12, and is attached to the upper portion of each support portion 13. Each drive mechanism 16 is configured to reciprocate (up and down) the upper table 12 relative to the lower table 11 in the vertical direction.

Then, when bending the work, the press brake 10 places the work on the die D of the lower table 11 and positions the work, and then lowers the upper table 12 to engage the die D with the punch P. As a result, the work can be bent into a V shape.

[Structure of bending angle detection unit]
FIG. 3 is a perspective view showing a schematic configuration of the bending angle detection unit 20, FIG. 4 is a side view showing the schematic configuration, and FIG. 5 is a view taken along the line AA of FIG. Further, FIG. 6 is a side view schematically showing how the bending angle detecting unit 20 is mounted on the lower table 11, and FIG. 7 is a top view showing a part of the schematic configuration of the bending angle detecting unit 20.

As shown in FIGS. 3 to 7, the bending angle detecting unit 20 of the bending angle detecting system 1 is mounted on the lower table 11 of the press brake 10 in the present embodiment. The bending angle detection unit 20 has a pair of plate-shaped base plates (a pair of support base portions) 21 extending in parallel with the plate surfaces (main surfaces) parallel to each other, and the extending direction (left-right direction) of these base plates 21. At both ends, there are a plurality of inverted U-shaped connecting brackets (connecting portions) 22 for connecting the base plates 21 while maintaining the parallel state. The base plate 21 is formed so that its length (extended length) is longer than, for example, the length of the lower table 11 in the left-right direction.

Further, the bending angle detecting unit 20 is a pair of angle detecting devices 23 provided with an angle sensor for detecting the bending angle of the work when the work is bent into a V shape by the press brake 10 as described above. (In this embodiment, two pairs). Since the pair of angle detection devices 23 are arranged in pairs on the opposite side of the pair of base plates 21 in the opposite direction, that is, on the operator side (front side) and the back gauge side (rear side) of the press brake 10, the base plates 21 are extended respectively. A plurality of sets are provided so as to move in pairs in the left-right direction along the current direction so that the movement can be positioned freely.

Specifically, the pair of angle detection devices 23 are integrally supported by the base plate 21 by a slide member 25 fitted to a guide member 24 extending in the left-right direction provided on the base plate 21. As a result, the pair of angle detection devices 23 are supported so that the slide members 25 can move in the left-right direction for each pair by moving the slide members 25 in pairs in the left-right direction along the guide member 24. Since a known configuration can be adopted for the angle detection device 23, detailed description thereof will be omitted here, but for example, those described in Japanese Patent No. 6167013 and those described in Japanese Patent Application Laid-Open No. 2006-205256 are described. It can be configured in the same way as the one.

As shown in FIG. 6, a lower mold holder 14 having a die D attached to the upper surface is mounted on the upper surface of the lower table 11. The lower mold holder 14 is clamped and fixed from the front and rear by a tightening plate (tightening plate) 15 detachably attached to the front surface and the rear surface of the lower table 11. As shown in FIG. 7, the tightening plate 15 is attached to the lower table 11 by a tightening nut 27 screwed into a plurality of tightening screws (tightening bolts) 26 which are arranged through the tightening plate 15. It is tightened. Therefore, the lower mold holder 14 is detachably attached to the lower table 11 by loosening the tightening nut 27.

The tightening screw 26 is screw-tightened / loosely attached to the lower table 11, and since a tap (screw hole) is cut in the head of the screw, a mounting screw (mounting bolt) is attached to this tap. By screwing 28, the base plate 21 can be screwed. These taps and mounting screws 28 form the fastening means. Therefore, the bending angle detection unit 20 is mounted on the lower table 11 by the base plate 21 which is long in the left-right direction abuts on the inner side surface in the front-rear direction with the head of the tightening screw 26 and is horizontally mounted by the mounting screw 28. Will be done. Since the tightening screw 26 also functions as a mounting means for the tightening plate 15, the mounting space and the number of parts for mounting the bending angle detection unit 20 do not increase.

The pair of angle detection devices 23 are driven by the drive unit 30 and the driven unit 31 so as to be movable and positioned in the left-right direction along the guide member 24. As shown in FIG. 5, the drive unit 30 is arranged, for example, on the left side surface (left side) of the lower table 11 when viewed from the front surface. Further, for example, the driven unit 31 is arranged on the right side surface (right side) of the lower table 11 when viewed from the front surface.

More specifically, the drive unit 30 is attached to the base bracket 32 vertically attached to the connecting bracket 22 arranged on the left side surface side of the lower table 11 by, for example, a plurality of bolts 32a. Further, the driven unit 31 is attached to the base bracket 32 vertically attached to the connecting bracket 22 arranged on the right side surface side of the lower table 11 by, for example, a plurality of bolts 32a. A positioning plate 22a for determining the position of the bending angle detecting unit 20 in the left-right direction is detachably attached to the connecting bracket 22 on the drive unit 30 side by a bolt 22b when the bending angle detecting unit 20 is mounted on the lower table 11. It is attached to.

Then, for example, the first rotating shaft 33 is horizontally and rotatably arranged in the front-rear direction on the base bracket 32 on the left side surface side. Large-diameter first pulleys 34 are provided at both ends of the first rotating shaft 33 in the front-rear direction. Further, the first rotating shaft 33 is provided with a driven pulley 35 inside the first pulley 34 in the front-rear direction. A timing belt 38 around the drive pulley 37 rotated by the first servomotor 36 mounted on the base bracket 32 is mounted on the driven pulley 35. Therefore, by rotating the first servomotor 36 in the forward and reverse directions, the first pulley 34 can be rotated in the forward and reverse directions.

Further, for example, the base bracket 32 on the left side surface side is provided with a second rotating shaft 40 rotated by a second servomotor 43 mounted on the base bracket 32. The second rotating shaft 40 is arranged at the same height as the adjacent first rotating shaft 33, and rotates horizontally through the base bracket 32 in the front-rear direction inside the first rotating shaft 33 in the left-right direction. It is arranged freely. A second pulley 41 having a diameter smaller than that of the first pulley 34 is provided at both ends of the second rotating shaft 40 in the front-rear direction.

Further, the second rotating shaft 40 is provided with a driven pulley 42 inside in the front-rear direction with respect to the second pulley 41. A timing belt 45 around the drive pulley 44 rotated by the second servomotor 43 mounted on the base bracket 32 is mounted on the driven pulley 42. Therefore, by rotating the second servomotor 43 in the forward and reverse directions, the second pulley 41 can be rotated in the forward and reverse directions.

On the other hand, in the base bracket 32 on the right side surface, the first driven shaft 46 is arranged horizontally with the first rotating shaft 33 at the same height position as the first rotating shaft 33 of the base bracket 32 on the left side surface side. Moreover, it is rotatably arranged so as to penetrate in the front-rear direction. A driven pulley 47 having the same diameter as the first pulley 34 is provided at both ends of the first driven shaft 46 in the front-rear direction so as to face each other in the left-right direction. A first timing belt 48 is hung around the front and rear driven pulleys 47 and the front and rear first pulleys 34.

Further, at the same height position on the inner side in the left-right direction from the first driven shaft 46, the second driven shaft 49 arranged so as to horizontally penetrate the base bracket 32 on the right side surface side in the front-rear direction rotates. It is provided freely. A driven pulley 50 having the same diameter as the second pulley 41 is provided at both ends of the second driven shaft 49 in the front-rear direction. A second timing belt 51 is hung around the second pulley 41 and the driven pulley 50 in the front-rear direction facing each other in the left-right direction. With such a configuration, the first and second servomotors 36 and 43 are individually rotated in the forward and reverse directions, so that the first and second timing belts 48 and 51 are individually rotated in the forward and reverse directions.

In addition, in order to move the pair of angle detection devices 23 movably supported in the left-right direction along the guide members 24 arranged on the front and rear base plates 21 in the left-right direction, a pair of pairs in the front-rear direction. The first angle detection device 23A is connected to the first timing belt 48 via the first belt connecting bracket 52. Further, another pair of second angle detection devices 23B in the front-rear direction are connected to the second timing belt 51 via the second belt connecting bracket 53.

The first and second belt connecting brackets 52 and 53 are formed, for example, in the same shape and the same dimensions, and their base ends are positioned at the same height in the same space between the first and second timing belts 48 and 51. It is located in. The modes of connecting the first and second belt connecting brackets 52 and 53 to the first and second timing belts 48 and 51 are reversed in the vertical direction in order to avoid mutual interference.

With such a configuration, when the first servomotor 36 is rotated in the forward and reverse directions, the front and rear first pulleys 34 are rotated in the forward and reverse directions in synchronization, so that the front and rear first timing belts 48 travel in the same direction in synchronization. Driven. Therefore, the pair of first angle detection devices 23A connected to the first timing belt 48 and paired back and forth move in synchronization with each other in the left-right direction.

Further, when the second servomotor 43 is rotated in the forward and reverse directions, the front and rear second pulleys 41 are synchronously rotated in the forward and reverse directions, so that the front and rear second timing belts 51 are synchronously driven to travel in the same direction. As a result, the other pair of second angle detection devices 23B connected to the second timing belt 51 and paired back and forth move in synchronization with each other in the left-right direction. As described above, in the bending angle detection unit 20 of the present embodiment, the angle detection device 23 is provided with a plurality of sets of angle detection mechanisms including a pair of front and rear first angle detection devices 23A and a pair of second angle detection devices 23B. The included angle sensor (not shown) is individually moved and positioned in the left-right direction for each set according to the set position of the punch P and die D of the press brake 10 and the width dimension in the left-right direction of the work. Is possible.

Since the bending angle detection unit 20 of the present embodiment can be handled as a unit that can be attached to the press brake 10, for example, when assembling the press brake 10, the occupancy rate required for assembly can be reduced, and as a result, the assembly man-hours can be reduced. It becomes possible to prevent the increase of.

[Mounting method of bending angle detection unit]
Next, a method of mounting the bending angle detection unit 20 on the press brake 10 will be described. FIG. 8 is a perspective view showing a schematic configuration of a mounting jig of the bending angle detecting unit, and FIGS. 9 to 11 are partial vertical cross-sectional views for explaining a mounting procedure of the bending angle detecting unit. Further, FIG. 12 is a partial vertical cross-sectional view for explaining the state of the lower table after mounting the bending angle detection unit.

As shown in FIGS. 6 and 7, the bending angle detection unit 20 is mounted on the press brake 10 by attaching the base plate 21 to the lower table 11 by the mounting screws 28 screwed into the tightening screws 26 as described above. Will be done.

At the time of this mounting, the bending angle detection unit 20 is first transported in a state of being mounted on a mounting jig 60 as shown in FIG. That is, the bending angle detection unit 20 may be handled so as to be transported or mounted as a single unit, but is preferably handled integrally with the mounting jig 60 attached during transportation or mounting. Is good.

The mounting jig 60 is a main frame in which a plurality of hanging hooks (hanging means) 61 for hooking hooks of transportation equipment such as a lifting crane, a forklift, and a hand lifter (not shown) are provided at predetermined positions (here, two places). It has a plate-shaped support frame 63 that is wider and parallel to the main frame 62 in the front-rear direction than the main frame 62 in a state where the plate surface is parallel to the lower portion of the main frame 62.

Further, the mounting jig 60 includes a connection bracket 64 that connects the main frame 62 and the support frame 63 in the front-rear direction at predetermined intervals in the left-right direction, and a shipping that connects the front and rear support frames 63 below the connection bracket 64. It has a block 65 and.

The main frame 62 of the mounting jig 60 is formed so that its length (extended length) is longer in the left-right direction than that of the bending angle detection unit 20. On the other hand, each support frame 63 is formed so as to be shorter in the left-right direction than the base plate 21. Further, as shown in FIG. 9, the main frame 62 is formed in a U-shape having a vertical cross section extending in the left-right direction. The tips of the pair of wall portions 62a in the front-rear direction of the main frame 62 are bent inward in the front-rear direction, for example, in order to increase the strength.

Then, the connection bracket 64 is bolted to the pair of wall portions 62a of the main frame 62 from the outside in the front-rear direction by bolts 64a at predetermined positions. Of the pair of wall portions 62a of the main frame 62, the front wall portion 62a in the front-rear direction has a jack receiving portion 66 having an inverted U-shaped vertical cross section extending forward toward the central portion in the left-right direction. It is provided.

Further, the support frame 63 of the mounting jig 60 is attached to the connection stay 64b provided below each connection bracket 64 by, for example, being nut-fastened by a nut 63a from the vertical direction. The shipping blocks 65 arranged between the support frames 63 are bolted to the support frame 63 by bolts 65a below the connecting stay 64b.

The shipping block 65 is placed on the upper surface of the lower table 11 when the bending angle detection unit 20 is mounted on the press brake 10, and is a tightening plate attached to the front surface of the lower table 11 in the left-right direction. It is arranged so as to fit between 15. Therefore, by using this mounting jig 60, the bending angle detection unit 20 can be positioned at least in the vertical direction and the horizontal position with respect to the lower table 11 to some extent at the stage of temporary fixing.

The bending angle detection unit 20 is integrally suspended from the mounting jig 60 by bolting the base plate 21 to the inside of the support frame 63 in the front-rear direction by bolts 63b. A plurality of positioning pins 63c with which the upper ends of the base plates 21 abut are provided on the inner plate surface of each support frame 63 in the front-rear direction. Each of these positioning pins 63c determines the vertical position of the bending angle detection unit 20 with respect to the mounting jig 60. Further, each support frame 63 is provided with a plurality of relief grooves 63d (see FIG. 8) formed so as to be recessed from the lower end at a predetermined position to avoid the tightening screws 26 and the like.

When the bending angle detection unit 20 is integrally attached to the mounting jig 60 configured in this way, for example, the hook of the transport device is hooked on the hanging hook 61 to suspend the bending angle detection unit 20. The mounting jig 60 is transported above the mounting position on the lower table 11 of the press brake 10. At this time, the front tightening plate 15 is attached in advance to the front surface of the lower table 11 by the tightening screw 26 and the tightening nut 27, and the tightening screw 26 and the tightening nut 27 are attached to the rear surface of the lower table 11. Only install.

The tightening screw 26 on the front side is attached to the base plate 21 on the front side of the bending angle detection unit 20 at a position where its head abuts at the mounting position. On the other hand, the rear tightening screw 26 is screwed into the lower table 11 until it comes into contact with the end surface of the front tightening screw 26. By doing so, for example, as shown in FIG. 9, a predetermined gap g as a working margin is provided between the head of each tightening screw 26 and each base plate 21 of the mounted bending angle detection unit 20. The tightening screw 26 is attached so that the space is free.

Then, in such a state, the mounting jig is brought into contact with the upper surface of the lower table 11 so as to be positioned between the plurality of tightening plates 15 as shown by the arrows in FIG. 60 is lowered, and the bending angle detection unit 20 is placed on the lower table 11. Although not shown, at this time, it is preferable that the hook of the transporting device is still hooked on the hanging hook 61, but from the viewpoint of mounting work, the hook of the transporting device is pulled from the hanging hook 61. You may remove it. Further, there is also a predetermined gap g as a working margin between each shipping block 65 and the tightening plate 15.

When the bending angle detecting unit 20 is placed on the lower table 11 in this way, as shown by the arrow in FIG. 10, the bending angle detecting unit 20 is shifted until the front base plate 21 abuts on the head of the front tightening screw 26. (move). Then, as shown in FIG. 11, the mounting screw 28 is attached to the head of the front tightening screw 26 from the outside of the front base plate 21, and the mounting screw 28 is screwed into the front base plate 21 to bring the front base plate 21 to the front surface of the lower table 11. Attach to the side.

On the other hand, as shown by an arrow in FIG. 10, the rear tightening screw 26 is loosened and projected so that its head abuts on the rear base plate 21 after the front base plate 21 is attached. Then, as shown in FIG. 11, the mounting screw 28 is attached to the head of the rear tightening screw 26 from the outside of the rear base plate 21, and the mounting screw 28 is screwed into the rear base plate 21 to lower the table. It is attached to the rear surface side of 11. As a result, the bending angle detection unit 20 is mounted on the lower table 11 at the regular mounting position.

After mounting the bending angle detection unit 20 by attaching the base plate 21 on the rear side, the mounting jig 60 is removed from the bending angle detection unit 20 by removing the bolt 63b shown in FIG. 10, and is indicated by an arrow in FIG. As described above, it is possible to remove only the mounting jig 60 by the transportation device.

After that, the tightening nut 27 screwed to the rear tightening screw 26 is loosened, and the rear tightening plate 15 is inserted between the tightening nut 27 and the rear surface of the lower table 11. As shown in 12, the rear tightening nut 27 is tightened so that the lower mold holder 14 to which the die D is attached is sandwiched between the tightening plates 15.

As a result, the pre-operation preparation of the lower table 11 in which the bending angle detection unit 20 is mounted at the regular mounting position is completed. As described above, by using the mounting jig 60 of the present embodiment, the bending angle detection unit 20 can be easily retrofitted to the press brake 10, so that the assembly occupancy rate is lowered and the man-hours are increased as described above. Can be prevented.

[Other implementation methods]
FIG. 13 is a perspective view showing a schematic configuration of a transport jig for transporting and mounting the bending angle detection unit together with the mounting jig, and FIGS. 14 and 15 show bending angle detection attached to the mounting jig by the transport jig. It is a perspective view and the top view for demonstrating the mounting procedure of a unit. Further, FIG. 16 is an enlarged arrow view showing the line BB of FIG. 15, and FIG. 17 is for explaining the mounting procedure of the bending angle detection unit mounted on the mounting jig by the transport jig. It is a side view. The same or corresponding components as those already described are designated by the same reference numerals, and duplicate description will be omitted.

When the above-mentioned mounting jig 60 to which the bending angle detection unit 20 is attached cannot be transported and mounted on the lower table 11 by a transportation device due to problems such as equipment scale and space, bending angle detection A transport jig 70 is used for transporting the mounting jig 60 itself to which the unit 20 is attached and mounting the bending angle detection unit 20 on the lower table 11.

As shown in FIG. 13, the transport jig 70 is a rectangle made of a square cross-sectional member such as metal that is vertically extended in a pair in the vertical direction and is connected in the vertical direction at a plurality of locations on the front side of the lower table 11. It has a main frame portion 71 having a shape, and side frame portions 72 extending from both ends in the left-right direction of the main frame portion 71 toward the rear (toward the press brake 10) in the front-rear direction.

Further, the transfer jig 70 includes a subframe portion 73 extending shorter than the side frame portion 72 toward the front side of the lower table 11 at the central portion in the left-right direction of the main frame portion 71, and the subframe portion 73. It has a main elevating mechanism 74 provided in the above, and a stopper mechanism 75 provided with a shock absorbing portion 75a for positioning the transfer jig 70 on the front side of the lower table 11.

The main elevating mechanism 74 is provided at a position corresponding to the jack receiving portion 66 of the mounting jig 60 in the subframe portion 73 in the vertical direction, and is configured to be capable of elevating and lowering by the operation handle 74a. Further, on the inside of the side frame portion 72 in the left-right direction, the mounting jig 60 can be raised and lowered in conjunction with, for example, the main elevating mechanism 74 at a position corresponding to the vicinity of both ends of the main frame 62 in the left-right direction in the vertical direction. A pair of sub elevating mechanisms 76 are provided.

Further, reinforcing plates 77 for increasing the strength are attached to the connection points between the main frame portion 71 and the side frame portion 72 and the connection points between the main frame portion 71 and the subframe portion 73, respectively. Further, below the side frame portion 72 and the subframe portion 73, a plurality of casters (moving wheels) 78 for making the transfer jig 70 movable are provided.

When mounting on the lower table 11, first, the mounting jig 60 to which the bending angle detection unit 20 is attached is attached to the transfer jig 70 configured in this way with the jack receiving portion 66 and the main elevating mechanism 74. The main frame 62 and the sub elevating mechanism 76 are placed so as to correspond to each other in the vertical direction. Next, the user operates the operation handle 74a so that the bending angle detection unit 20 does not interfere with the lower table 11, and the mounting jig 60 is raised to a predetermined height by the main elevating mechanism 74 and the sub elevating mechanism 76. ..

Then, as shown in FIGS. 14 to 17, the transfer jig 70 is brought closer to the lower table 11 from the front of the lower table 11, and the side frame portions 72 are located on both side surfaces in the left-right direction of the lower table 11. The stopper mechanism 75 is brought into contact with the front surface of the lower table 11 to position the transfer jig 70 with respect to the lower table 11. At this time, as shown in FIGS. 15 and 16, the impact buffer portion 75a of the stopper mechanism 75 comes into contact with the front surface of the lower table 11 to soften the impact at the time of contact, so that the transfer jig 70 is used for the lower table 11. It is avoided to collide vigorously with.

When the transfer jig 70 is positioned with respect to the lower table 11, the mounting jig 60 is bent by the main elevating mechanism 74 and the sub elevating mechanism 76 by operating the operation handle 74a as described above, and the bending angle detection unit 20 It is lowered to the height of the regular mounting position with respect to the lower table 11.

After that, as described above, the tightening screws 26, the tightening nuts 27, and the mounting screws 28 on the front and rear sides of the lower table 11 are handled, the bending angle detection unit 20 is mounted on the lower table 11, and the mounting jig 60 is mounted. After removing the mounting jig 60, the mounting jig 60 may be raised to a predetermined height by the main lifting mechanism 74 and the sub lifting mechanism 76, and the transport jig 70 may be retracted.

As described above, when the transfer jig 70 of the present embodiment is used, not only the operation and effect similar to the operation and effect of the mounting jig 60 are obtained, but also the equipment scale and space of the place where the press brake 10 is installed are convenient. It is possible to mount the bending angle detection unit 20 without being affected by problems or the like.

Although some embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

For example, in the above embodiment, the pair of angle detection devices 23 before and after the bending angle detection unit 20 are connected to the timing belts 48 and 51 via the belt connecting brackets 52 and 53, and the servomotors 36 and 43 are connected. However, the configuration of the drive unit 30 and the driven unit 31 is not limited to this, and the pair of front and rear angle detection devices 23 can be individually driven and driven. If so, various shapes and structures, arrangement modes, and the like can be adopted.

1 Bending angle detection system 10 Press brake 11 Lower table 12 Upper table 13 Support (side frame)
14 Lower mold holder 15 Tightening plate 16 Drive mechanism 20 Bending angle detection unit 21 Base plate 22 Connecting bracket 23 Angle detection device 24 Guide member 25 Slide member 26 Tightening screw 27 Tightening nut 28 Mounting screw 30 Drive unit 31 Driven unit 60 Mounting Jig 70 Transfer jig

Claims (14)

A pair of plate-shaped support bases that extend with the plate surfaces parallel and are attached to the press brake,
It is provided with a pair of angle detection mechanisms provided so as to be movable and positioned along the extending direction on the outer side of the pair of support bases in the opposite direction.
The pair of support base portions are arranged so as to face each other at intervals at which the lower table of the press brake can be inserted, and can be mounted on the lower table via a fastening means. unit. A claim, wherein the fastening means is composed of a screw hole formed in the head of a tightening bolt used for attaching a tightening plate to the lower table, and a mounting bolt attached to the screw hole. 1. The bending angle detection unit according to 1. The bending angle detecting unit according to claim 1 or 2, wherein the pair of support base portions are formed so that the extending length thereof is longer than the length in the left-right direction of the lower table. The bending according to any one of claims 1 to 3, further comprising a connecting portion for connecting each support base portion while maintaining a parallel state at an end portion of the pair of support base portions in the extending direction. Angle detection unit. A bending angle detection system including a press brake having an upper table and a lower table, and a bending angle detecting unit mounted on the press brake to detect a bending angle of a work.
The bending angle detection unit extends in a state where the plate surfaces are parallel to each other, and is attached to the lower table with a pair of plate-shaped support base portions and the pair of support base portions facing outward in the extending direction. A pair of angle detection mechanisms provided so as to be movable and positioned are provided, and the pair of support base portions are arranged to face each other at intervals at which the lower table can be inserted, and can be attached to the lower table via fastening means. A bending angle detection system characterized by being configured in. The press brake has tightening bolts and tightening nuts for attaching tightening plates to the front side and the rear side in the front-rear direction of the lower table, respectively.
The fastening means is composed of a screw hole formed in the head of the tightening bolt and a mounting bolt attached to the screw hole.
The bending angle detection unit has the pair of support bases in contact with the heads of the tightening bolts and screwed to the lower table by mounting bolts screwed into the screw holes. The bending angle detection system according to claim 5, wherein the lower table is positioned and mounted in the front-rear direction. The fifth or sixth aspect of the present invention, wherein the bending angle detecting unit includes a connecting portion for connecting the support base portions while maintaining a parallel state at the end portions of the pair of support base portions in the extending direction. Bending angle detection system. The bending angle detecting system according to claim 7, wherein the bending angle detecting unit is positioned in the left-right direction with respect to the lower table by a positioning plate detachably attached to the connecting portion. A method of mounting a bending angle detecting unit for mounting a bending angle detecting unit for detecting a bending angle of a work in the press brake on a press brake having an upper table and a lower table.
The bending angle detection unit extends in a state where the plate surfaces are parallel to each other, and is attached to the lower table with a pair of plate-shaped support base portions and the pair of support base portions facing outward in the extending direction. It is provided with a pair of angle detection mechanisms provided so as to be movable and positioned, and the pair of support base portions are arranged so as to face each other at intervals at which the lower table can be inserted, and are attached to the lower table via fastening means. It is a thing
A main frame extending in the extending direction, a pair of plate-shaped support frames attached to the main frame and extending in a state where the plate surfaces are parallel to each other and supporting the pair of support base portions, and the pair of supports. Using a mounting jig with a shipping block that connects the frames in opposite directions,
A step of attaching the pair of support frames to the pair of support bases of the bending angle detection unit, and
A step of transporting the bending angle detection unit to which the pair of support frames are attached together with the mounting jig to a mounting position on the lower table.
A step of placing the mounting jig on the lower table so that the shipping block comes into contact with the lower table, and arranging the bending angle detection unit with respect to the lower table.
A step of attaching the pair of support base portions to the lower table by the fastening means, and
A method for mounting a bending angle detection unit, which comprises a step of removing the pair of support frames from the pair of support base portions and removing the mounting jig. The fastening means is composed of a screw hole formed in the head of a tightening bolt to which a tightening nut for attaching a tightening plate to the lower table is attached, and a mounting bolt attached to the screw hole.
In the step of attaching the pair of support base portions, the pair of support base portions are brought into contact with the heads of the tightening bolts, and the mounting bolts are screwed into the screw holes to be screwed. The method for mounting a bending angle detecting unit according to claim 9, wherein the bending angle detecting unit is positioned and attached to the lower table in the front-rear direction of the lower table. The tightening nut and the tightening bolt are screw-tightened / loosened to the lower table.
In the step of attaching the pair of support base portions, the front support base portion of the bending angle detection unit is brought into contact with the head of the front tightening bolt in the front-rear direction of the lower table, and the screw holes of the tightening bolt are brought into contact with each other. After screwing the mounting bolts into the front and screwing the support base on the front side, loosen the tightening bolts on the rear side in the front-rear direction of the lower table to support the head of the lower table on the rear side of the bending angle detection unit. The method for mounting a bending angle detection unit according to claim 10, wherein the mounting bolt is screwed into the screw hole of the tightening bolt so as to be brought into contact with the base portion, and the support base portion on the rear side is screwed. .. After removing the mounting jig, the step of loosening the tightening nut attached to the tightening bolt on the rear side in the front-rear direction of the lower table and attaching the tightening plate to the rear side of the lower table is further provided. The method for mounting a bending angle detection unit according to claim 10 or 11. The method for mounting a bending angle detection unit according to any one of claims 10 to 12, wherein the mounting jig has a hanging means provided on the main frame. The main frame of the mounting jig has a extending length longer than the length of the bending angle detection unit in the extending direction, and a jack receiving portion extending in one direction in the opposite direction to the central portion in the extending direction. Have,
The claim is characterized in that, in the step of transporting to the mounting position, the mounting jig is transported by a transport jig having an elevating mechanism and moving wheels that support and raise and lower the mounting jig by both ends of the main frame and the jack receiving portion. 9. The method for mounting a bending angle detection unit according to any one of 9 to 13.

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