JP7329399B2 - BEND ANGLE DETECTION UNIT, BEND ANGLE DETECTION SYSTEM, AND BEND ANGLE DETECTION UNIT MOUNTING METHOD - Google Patents

Description

The present invention relates to a workpiece bending angle detection unit, a bending angle detection system, and a method of mounting the bending angle detection unit.

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

This press brake is provided with angle sensors that can be moved and positioned in the horizontal direction on both front and rear sides of the lower table. The angle sensors can be moved and positioned individually in the horizontal direction.

Japanese Patent No. 6167013

However, in the conventional press brake disclosed in Patent Document 1, it is necessary to directly attach the individual parts that make up the angle sensor to the press brake. There is a problem that the number of man-hours increases. In addition, because of the structure in which the angle sensor is directly incorporated into the press brake, there is also the problem that the need for retrofitting cannot be met.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a bending angle detection unit that can be retrofitted while reducing the occupancy rate during assembly of a press brake to prevent an increase in the number of man-hours. It is an object of the present invention to provide a mounting method for a press brake and a bending angle detection unit.

A bending angle detection unit according to the present invention includes a pair of plate-like support base portions that extend with their plate surfaces parallel and are attached to a press brake; and a pair of angle detection mechanisms which are movable and positionable along the length of the press brake. It is characterized in that it is configured to be mountable through the

In one embodiment of the present invention, the fastening means comprises a screw hole formed in the head of a tightening bolt used to attach the tightening plate to the lower table, and a mounting bolt attached to the screw hole. be.

In another embodiment of the present invention, the pair of support base portions are formed such that their extended length is longer than the length of the lower table in the horizontal direction.

In still another embodiment of the present invention, connecting portions are provided at the ends in the extending direction of the pair of supporting base portions to connect the supporting base portions while maintaining the parallel state.

A bending angle detection system according to the present invention is a bending angle detection system comprising a press brake having an upper table and a lower table, and a bending angle detection unit mounted on the press brake for detecting a bending angle of a work. , the bending angle detection unit includes a pair of plate-like support base portions extending with the plate surfaces parallel to each other and attached to the lower table, and a pair of plate-like support base portions extending outward in the opposing direction of the pair of support base portions. and a pair of angle detection mechanisms provided so as to be freely movable and positionable, wherein the pair of support bases are arranged opposite to each other with a gap that allows the insertion of the lower table, and are attached to the lower table via fastening means. It is characterized by being configured to be able to

In one embodiment of the present invention, the press brake has a tightening bolt and a tightening nut that attach tightening plates to the front and rear sides of the lower table in the front-rear direction, respectively, and the tightening means comprises the tightening bolt. and a mounting bolt attached to the screw hole, and the bending angle detection unit is configured such that the pair of support base portions abut against the heads of the tightening bolts, and By being screwed by a mounting bolt screwed into the screw hole, it 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 bending angle detection unit includes a connecting portion that connects the pair of supporting base portions at the ends in the extending direction thereof while maintaining the parallel state of the supporting base portions.

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

A bending angle detection unit mounting method according to the present invention is a bending angle detection unit mounting method for mounting a bending angle detection unit for detecting a bending angle of a workpiece in a press brake having an upper table and a lower table. The bending angle detection unit includes a pair of plate-shaped support base portions that extend in parallel with the plate surfaces and are attached to the lower table, and the bending angle detection unit extends outward in the opposing direction of the pair of support base portions. a pair of angle detection mechanisms that are movable and positionable along a direction, the pair of support bases are arranged opposite to each other with a gap that allows the insertion of the lower table, and fastening means are attached to the lower table A main frame extending in the extending direction, and a pair of plate-like plates attached to the main frame and extending with the plate surfaces parallel to each other and supporting the pair of supporting base portions and a shipping block that connects the pair of support frames in opposite directions, and the pair of support frames are attached to the pair of support base portions of the bending angle detection unit, respectively. carrying the bending angle detection unit to which the pair of support frames are attached to a mounting position on the lower table together with the mounting jig; placing the mounting jig and arranging the bending angle detection unit on the lower table; attaching the pair of support bases to the lower table; and the pair of support frames. from the pair of supporting 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 the 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 threaded holes. Thus, 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 attached to the lower table so that they can be screwed/loosened, and in the step of attaching the pair of support bases, the lower table The front support base portion of the bending angle detection unit is brought into contact with the head of a front tightening bolt in the longitudinal direction, and a mounting bolt is screwed into the screw hole of the tightening bolt to secure the front support base portion. After screwing, the tightening bolt on the rear side of the lower table in the front-rear direction is loosened and its head is brought into contact with the support base portion on the rear side of the bending angle detection unit. A mounting bolt is screwed to screw the rear support base.

In still another embodiment of the present invention, after the mounting jig is removed, a tightening nut attached to a tightening bolt on the rear side of the lower table in the front-rear direction is loosened so that the mounting jig is mounted on the rear side of the lower table. The step of attaching the tightening plate is further provided.

In still another embodiment of the present invention, the main frame of the mounting jig has an extension length longer than that of the bending angle detection unit in the extension direction, and faces the central portion in the extension direction. In the step of transporting the mounting jig to the mounting position, the mounting jig is supported by both end portions of the main frame and the jack receiving portions, and an elevating mechanism and moving wheels are provided to raise and lower the mounting jig. It is transported by the transport jig provided.

According to the present invention, it is possible to reduce the occupancy rate during assembly of the press brake, prevent an increase in man-hours, and enable retrofitting.

1 is a front view showing a schematic configuration of a press brake provided with a bending angle detection unit that constitutes a bending angle detection system according to an embodiment of the present invention; FIG. It is a side view which shows schematic structure of the same press brake. It is a perspective view which shows schematic structure of the same bending angle detection unit. It is a side view which shows schematic structure of the same bending angle detection unit. FIG. 5 is a view taken along the line AA of FIG. 4; It is a side view which shows roughly a mode that the bending angle detection unit was mounted in the lower table. It is a top view which shows a part of schematic structure of the same bending angle detection unit. It is a perspective view which shows schematic structure of the mounting jig|tool of the same bending angle detection unit. It is a partial longitudinal cross-sectional view for demonstrating the mounting procedure of the same bending angle detection unit. It is a partial longitudinal cross-sectional view for demonstrating the mounting procedure of the same bending angle detection unit. It is a partial longitudinal cross-sectional view for demonstrating the mounting procedure of the same bending angle detection unit. It is a partial vertical cross-sectional view for explaining the state of the lower table after mounting the same bending angle detection unit. It is a perspective view which shows schematic structure of the conveyance jig for conveying and mounting the same bending angle detection unit with a 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 conveyance 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 conveyance jig. FIG. 16 is an enlarged view taken along line BB of FIG. 15; It is a side view for demonstrating the mounting procedure of the bending angle detection unit attached to the mounting jig by the same conveyance jig.

BEST MODE FOR CARRYING OUT THE INVENTION A bending angle detection unit, a bending angle detection system, and a method of mounting a bending angle detection unit according to embodiments of the present invention will now 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 to the solution of the invention. .

[Configuration of bending angle detection system]
FIG. 1 is a front view showing a schematic configuration of a press brake provided with a bending angle detection unit constituting a bending angle detection system according to one embodiment of the present invention, and FIG. 2 is a side view showing a schematic configuration of this press brake. It is a diagram.

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. 10 and a bending angle detection unit 20 to perform bending including detection of the bending angle of the workpiece (not shown).

Since the basic structure of the press brake 10 and the basic structure of the bending angle detection unit 20 are already known, only outlines will be described here, excluding parts that require description. Further, in the following description, "X-axis direction" means the left-right direction when facing the front of the press brake 10, "Y-axis direction" means the depth direction in this case, and "Z-axis direction". means the vertical direction in this case. In addition, in this embodiment, the scale and dimensions of each component may be exaggerated, and some components may be omitted.

[Configuration of press brake]
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 at the center of the front surface. A lower table 11 and an upper table 12 are arranged. The lower table 11 and the upper table 12 are provided on the lower front side and the upper front side of the support portion 13, respectively, in a state of being elongated in the left-right direction (X-axis direction).

The support portions 13 are arranged on the left and right sides of the press brake 10 to support the tables 11 and 12, respectively. Furthermore, in this embodiment, the press brake 10 is provided with a drive mechanism 16 configured, for example, to vertically reciprocate the upper table 12 with respect to the lower table 11 .

The lower table 11 is made of a plate-shaped member such as metal, and has a plurality of lower die holders (die holders) 14 (see FIG. 6) for holding a lower die such as a die D having V-grooves on its upper portion. The upper table 12 is made of a plate-shaped member such as a metal similar to the lower table 11, and has a punch P (not shown) for bending a plate-shaped work (not shown) in cooperation with a die D at its lower part. ) has an upper die holder (not shown) for holding the upper die.

In the present embodiment, each support portion 13 is configured by, for example, a plate-like side frame formed in a substantially U-shape when viewed from the side, but is not limited to this, and may be a rod-like tie bar or the like. may be configured by 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 along the vertical direction.

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

[Configuration of bending angle detection unit]
3 is a perspective view showing a schematic configuration of the bending angle detection unit 20, FIG. 4 is a side view showing the same schematic configuration, and FIG. 5 is a view taken along line AA in FIG. 6 is a side view schematically showing how the bending angle detection 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 detection unit 20. As shown in FIG.

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

The bending angle detection unit 20 also includes a pair of angle detection devices 23 having angle sensors for detecting the bending angle of the work when the press brake 10 bends the work into a V shape as described above. (two pairs in this embodiment). The pair of angle detectors 23 are arranged on the outside of the pair of base plates 21 in the facing direction, that is, on the operator side (front side) and the back gauge side (rear side) of the press brake 10 . A plurality of sets are provided so that they can be moved in pairs in the lateral direction along the existing direction and can be moved and positioned freely.

Specifically, the pair of angle detection devices 23 are integrally supported on the base plate 21 by slide members 25 that fit into guide members 24 provided on the base plate 21 and extending in the left-right direction. As a result, the pair of angle detection devices 23 are supported so as to be movable in the left-right direction for each set by the pair of slide members 25 moving in the left-right direction along the guide member 24 . Regarding the angle detection device 23, since a known configuration can be adopted, a detailed description is omitted here. can be configured in the same way as

As shown in FIG. 6, a lower die holder 14 having a die D attached to the upper surface is attached to the upper surface of the lower table 11 . The lower mold holder 14 is clamped and fixed from front and rear by clamping plates (tightening plates) 15 detachably attached to the front and rear surfaces of the lower table 11 . As shown in FIG. 7, the clamping plate 15 is attached to the lower table 11 by clamping nuts 27 screwed onto a plurality of clamping screws (tightening bolts) 26 arranged through the clamping plate 15. tightened. Accordingly, the lower mold holder 14 is attached to the lower table 11 in a detachable and replaceable manner by loosening the tightening nut 27 .

The tightening screw 26 is attached to the lower table 11 so that it can be screwed/loosen, and a tap (screw hole) is cut in the head of the screw, so that a mounting screw (mounting bolt) can be attached to the tap. By screwing 28, the base plate 21 can be screwed. These taps and mounting screws 28 constitute fastening means. Therefore, the bending angle detection unit 20 is mounted on the lower table 11 by horizontally attaching the base plate 21, which is elongated in the left-right direction, to the head of the tightening screw 26 with the inner surface in the front-rear direction contacting the head of the tightening screw 26, and horizontally mounting the base plate 21. be done. Since the tightening screws 26 also function as mounting means for the tightening plate 15, the mounting space for mounting the bending angle detection unit 20 and the number of parts do not increase.

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

More specifically, the drive unit 30 is attached to a base bracket 32 vertically attached to a connecting bracket 22 arranged on the left side of the lower table 11 by, for example, a plurality of bolts 32a. The driven unit 31 is attached to a base bracket 32 vertically attached to a connecting bracket 22 arranged on the right side of the lower table 11 by, for example, a plurality of bolts 32a. A positioning plate 22a for determining the horizontal position of the bending angle detection unit 20 is detachably attached to the connection bracket 22 on the drive unit 30 side with a bolt 22b when the bending angle detection unit 20 is mounted on the lower table 11. attached to the

A first rotary shaft 33 is horizontally and rotatably arranged in the front-rear direction so as to pass through the base bracket 32 on the left side, for example. 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 is looped around the driven pulley 35 around a drive pulley 37 rotated by a first servomotor 36 mounted on the base bracket 32 . 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 is provided with a second rotating shaft 40 that is rotated by a second servo motor 43 attached to the base bracket 32 . The second rotating shaft 40 is arranged at the same height as the adjacent first rotating shaft 33, and rotates by horizontally penetrating the base bracket 32 in the front-rear direction inside the first rotating shaft 33 in the left-right direction. placed freely. A second pulley 41 having a diameter smaller than that of the first pulley 34 is provided at each end 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 the second pulley 41 in the front-rear direction. A timing belt 45 is looped around the driven pulley 42 around a drive pulley 44 rotated by a second servomotor 43 mounted on the base bracket 32 . Therefore, by rotating the second servomotor 43 forward and backward, it is possible to rotate the second pulley 41 forward and backward.

On the other hand, in the base bracket 32 on the right side, a first driven shaft 46 is arranged horizontally with the first rotation shaft 33 at the same height position as the first rotation shaft 33 of the base bracket 32 on the left side. , and is rotatably arranged so as to pass through in the front-rear direction. Driven pulleys 47 having the same diameter as the first pulley 34 are provided on 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 wound around the driven pulleys 47 on the front and rear sides and the first pulleys 34 on the front and rear sides.

A second driven shaft 49 that horizontally penetrates the right side base bracket 32 in the front-rear direction rotates at the same height position inside the first driven shaft 46 in the left-right direction. freely set. Driven pulleys 50 having the same diameter as the second pulley 41 are provided at both ends of the second driven shaft 49 in the front-rear direction. A second timing belt 51 is wound around the second pulley 41 and the driven pulley 50 in the front-rear direction, which face each other in the left-right direction. With such a configuration, the first and second timing belts 48 and 51 are individually rotated forward and reverse by rotating the first and second servomotors 36 and 43 forward and reverse, respectively.

In order to move the pair of angle detection devices 23 horizontally movably supported along guide members 24 arranged on the front and rear base plates 21, respectively, a pair of angle detectors 23 are paired in the front and rear direction. The first angle detection device 23A is connected to the first timing belt 48 via the first belt connection bracket 52 . Another set of second angle detection devices 23B forming a pair in the front-rear direction is connected to the second timing belt 51 via a second belt connection bracket 53 .

The first and second belt connection brackets 52 and 53 are formed, for example, to have the same shape and size, and their base ends are positioned at the same height within the same space between the first and second timing belts 48 and 51. are placed in Note that the connection manner of the first and second belt connection brackets 52, 53 to the first and second timing belts 48, 51 is reversed in the vertical direction to avoid mutual interference.

With such a configuration, when the first servomotor 36 is rotated forward and backward, the front and rear first pulleys 34 are synchronously rotated forward and backward, so the front and rear first timing belts 48 are synchronously driven in the same direction. driven. Accordingly, the pair of first angle detection devices 23A connected to the first timing belt 48 and forming a pair in the front-rear direction move synchronously in the left-right direction.

Further, when the second servomotor 43 is rotated forward and backward, the front and rear second pulleys 41 are synchronously rotated forward and backward, so that the front and rear second timing belts 51 are synchronously driven to run in the same direction. As a result, the other pair of second angle detection devices 23B connected to the second timing belt 51 and forming a pair in the front-rear direction move synchronously in the left-right direction. Thus, in the bending angle detection unit 20 of the present embodiment, the angle detection device 23 is detected by a plurality 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 in correspondence with the set position of the punch P and the die D of the press brake 10 and the width dimension of the work in the left-right direction. becomes 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, it is possible to reduce the occupation rate required for assembly, resulting in a reduction in the number of assembly man-hours. increase can be prevented.

[How to mount the 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 for the bending angle detection unit, and FIGS. 9 to 11 are partial longitudinal sectional views for explaining the procedure for mounting the bending angle detection unit. Also, FIG. 12 is a partial longitudinal sectional view for explaining the state of the lower table after the bending angle detection unit is mounted.

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 with the mounting screws 28 screwed into the tightening screws 26 as described above. be done.

For this mounting, the bending angle detection unit 20 is first transported while being attached to a mounting jig 60 as shown in FIG. That is, the bending angle detection unit 20 may be handled as if it were transported or mounted as a single unit, but it is preferable that it be handled integrally with the mounting jig 60 attached during transportation or mounting. and good.

The mounting jig 60 is a main frame provided with a plurality of hanging hooks (hanging means) 61 at predetermined positions (here, two positions) on which hooks of transportation equipment such as a lifting crane, a forklift, and a hand lifter (not shown) are hooked. 62, and a pair of plate-like support frames 63 extending in parallel with each other and wider than the main frame 62 in the front-rear direction.

The mounting jig 60 also 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 bracket that connects the front and rear support frames 63 to each other under the connection bracket 64 . block 65;

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

Connection brackets 64 are 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 wall portion 62a on the front side in the front-rear direction has a jack receiving portion 66 having an inverted U-shaped vertical cross section and extending forward toward the central portion in the left-right direction. is provided.

Further, the support frame 63 of the mounting jig 60 is attached to a connection stay 64b provided below each connection bracket 64 by being nut-fastened from above and below with a nut 63a, for example. The shipping blocks 65 arranged between the support frames 63 are bolted to the support frames 63 with bolts 65a below the connecting stays 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 a clamping plate attached to the front surface of the lower table 11 in the horizontal 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 direction with respect to the lower table 11 to some extent at the stage of temporary fixing.

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

After the bending angle detection unit 20 is integrally attached to the mounting jig 60 configured as described above, for example, while the bending angle detection unit 20 is suspended by hooking the hook of the transportation device on the hanging hook 61, 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 side clamping plate 15 is attached in advance to the front surface of the lower table 11 with the clamping screw 26 and the clamping nut 27, and the clamping screw 26 and the clamping nut 27 are attached to the rear surface of the lower table 11. only.

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

In order to achieve this state, the mounting jig is moved 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 illustration is omitted, at this time, it is preferable that the hook of the transportation device is hooked on the hanging hook 61. However, from the viewpoint of the mounting work, the hook of the transportation device can be removed from the hanging hook 61. You can remove it. A predetermined gap g is also provided between each shipping block 65 and the clamping plate 15 as a working margin.

After placing the bending angle detection unit 20 on the lower table 11 in this manner, the bending angle detection unit 20 is shifted until the front base plate 21 abuts the head of the front tightening screw 26 as indicated by the arrow in FIG. (move). 11, mounting screws 28 are attached to the heads of front fastening screws 26 from the outside of the front base plate 21, and the front base plate 21 is attached to the front surface of the lower table 11 by screwing in the mounting screws 28. As shown in FIG. attach to the side.

On the other hand, as indicated by the arrow in FIG. 10, after the front base plate 21 is attached, the rear tightening screw 26 is loosened so that its head abuts against the rear base plate 21 and protrudes. Then, as shown in FIG. 11, mounting screws 28 are attached to the heads of the rear tightening screws 26 from the outside of the rear base plate 21, and the mounting screws 28 are screwed in to attach the rear base plate 21 to the lower table. 11 is attached to the rear side. Thereby, the bending angle detection unit 20 is mounted on the lower table 11 at the normal mounting position.

After attaching the rear base plate 21 and mounting the bending angle detection unit 20, the mounting jig 60 is removed from the bending angle detection unit 20 by removing the bolt 63b shown in FIG. Thus, it is possible to remove only the mounting jig 60 by means of transportation equipment.

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 tightening nut 27 on the rear side is tightened so that the lower die holder 14 with the die D attached thereto is sandwiched between the tightening plates 15 .

This completes the pre-operation preparation of the lower table 11 with the bending angle detection unit 20 mounted at the normal mounting position. 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. Therefore, as described above, the assembling ratio is reduced and the number of man-hours is increased. can be prevented.

[Other implementation methods]
FIG. 13 is a perspective view showing a schematic configuration of a conveying jig for conveying and mounting the bending angle detection unit together with the mounting jig, and FIGS. 4A and 4B are a perspective view and a top view for explaining a procedure for mounting the unit; FIG. 16 is an enlarged view taken along the line BB in FIG. 15, and FIG. 17 is for explaining the mounting procedure of the bending angle detection unit attached to the mounting jig by the conveying jig. It is a side view. In addition, the same code|symbol is attached|subjected to the component which is the same as that which was already demonstrated, or corresponds, and the overlapping description is abbreviate|omitted.

If the above-described mounting jig 60 to which the bending angle detection unit 20 is attached cannot be transported and mounted on the lower table 11 by transportation equipment due to problems such as facility scale and space convenience, the bending angle detection A conveying jig 70 is used for conveying the mounting jig 60 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 conveying jig 70 is a rectangular member made of a square cross-section member such as a metal that extends in parallel in the left-right direction as a pair of upper and lower members on the front side of the lower table 11 and is connected in the vertical direction at a plurality of points. It has a shaped main frame portion 71 and side frame portions 72 extending from both ends in the left-right direction of the main frame portion 71 toward the rear in the front-rear direction (toward the press brake 10).

Further, the transport jig 70 includes a sub-frame portion 73 extending shorter than the side frame portion 72 toward the front side of the lower table 11 at the center portion in the left-right direction of the main frame portion 71, and the sub-frame portion 73 extending toward the front side of the lower table 11. and a stopper mechanism 75 provided with a shock absorbing portion 75 a for positioning the transport 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 sub-frame portion 73 in the vertical direction, and is configured to be capable of elevating operation by an operation handle 74a. In addition, on the inner side of the side frame portion 72 in the left-right direction, a portion vertically corresponding to the vicinity of the left-right end portions of the main frame 62 of the mounting jig 60 is provided with, for example, a main elevating mechanism 74 that can move up and down in conjunction with the main elevating mechanism 74. A pair of sub-lifting mechanisms 76 are provided.

Reinforcing plates 77 are attached to the connection points between the main frame portion 71 and the side frame portions 72 and the connection points between the main frame portion 71 and the sub-frame portion 73 to increase the strength. Furthermore, a plurality of casters (moving wheels) 78 are provided below the side frame portion 72 and the sub-frame portion 73 to make the transporting jig 70 movable.

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 conveying jig 70 configured as described above. And the main frame 62 and the sub lifting mechanism 76 are mounted so as to correspond to each other in the vertical direction. Next, the mounting jig 60 is lifted to a predetermined height by the main elevating mechanism 74 and the sub elevating mechanism 76 by operating the operation handle 74a, for example, so that the bending angle detection unit 20 does not interfere with the lower table 11. .

Then, as shown in FIGS. 14 to 17, the conveying jig 70 is brought close to the lower table 11 from the front of the lower table 11, and the side frame portions 72 are positioned on both sides of the lower table 11 in the left-right direction. , the stopper mechanism 75 is brought into contact with the front surface of the lower table 11 to position the conveying jig 70 with respect to the lower table 11 . At this time, as shown in FIGS. 15 and 16, the shock absorbing portion 75a of the stopper mechanism 75 comes into contact with the front surface of the lower table 11 to soften the shock at the time of contact. is avoided.

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

Thereafter, as described above, the front and rear tightening screws 26, tightening nuts 27 and mounting screws 28 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 removal, the mounting jig 60 is raised to a predetermined height again by the main lifting mechanism 74 and the sub lifting mechanism 76, and the conveying jig 70 is retracted.

As described above, if the conveying jig 70 of the present embodiment is used, not only can the same effects as those of the mounting jig 60 be obtained, but also the facility scale and space of the location where the press brake 10 is installed can be reduced. It is possible to mount the bending angle detection unit 20 without being affected by problems or the like.

Although several 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 embodied in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

For example, in the above embodiment, the pair of angle detection devices 23 on the front and rear sides of the bending angle detection unit 20 are connected to the timing belts 48 and 51 via the belt connection brackets 52 and 53, and the servo motors 36 and 43 are connected to the timing belts 48 and 51. 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, structures, arrangement modes, etc. can be adopted.

Reference Signs List 1 bending angle detection system 10 press brake 11 lower table 12 upper table 13 support (side frame)
14 lower die holder 15 tightening plate 16 drive mechanism 20 bending angle detection unit 21 base plate 22 connection 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 base portions extending with the plate surfaces parallel and attached to the press brake;
a pair of angle detection mechanisms provided so as to be movable and positionable along the extending direction outside the pair of support base portions in the opposing direction ;
A connection part that connects each support base part while maintaining a parallel state
with
The pair of support bases are arranged opposite to each other with a gap that allows insertion of the lower table of the press brake, and are configured to be attachable to the lower table via fastening means. unit. 4. The fastening means comprises a screw hole formed in the head of a fastening bolt used for attaching the fastening plate to the lower table, and a mounting bolt attached to the screw hole. 2. The bending angle detection unit according to 1. 3. The bending angle detection unit according to claim 1, wherein the pair of support base portions are formed such that their extended lengths are longer than the length of the lower table in the left-right direction. The connecting portion is provided at an end portion in the extending direction of the pair of support base portions.
The bending angle detection unit according to any one of claims 1 to 3, characterized in that: A bending angle detection system comprising a press brake having an upper table and a lower table, and a bending angle detection unit mounted on the press brake for detecting a bending angle of a workpiece,
The bending angle detection unit includes a pair of plate-like support base portions that extend with the plate surfaces parallel and are attached to the lower table, and a pair of plate-like support base portions extending outward in the opposing direction of the pair of support base portions. A pair of angle detection mechanisms that are movable and positionable , and a connecting portion that connects the support bases while maintaining a parallel state , the pair of support bases having a gap that allows the insertion of the lower table. A bending angle detection system, characterized in that it is disposed opposite to the lower table and can be mounted on the lower table via a fastening means. The press brake has a tightening bolt and a tightening nut that attach tightening plates to the front and rear sides of the lower table in the front-rear direction, respectively;
The fastening means comprises 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 is attached to the lower table by abutting the pair of support base portions on the heads of the tightening bolts and being screwed by mounting bolts that are screwed into the screw holes. 6. The bending angle detection system according to claim 5, wherein the bending angle detection system is positioned in the longitudinal direction of the lower table. The connecting portion is provided at an end portion in the extending direction of the pair of support base portions.
7. The bending angle detection system according to claim 5 or 6, characterized in that: The bending angle according to any one of claims 5 to 7, wherein the bending angle detection unit is positioned in the horizontal direction with respect to the lower table by a positioning plate detachably attached to the connecting portion. detection system. A bending angle detection unit mounting method for mounting a bending angle detection unit for detecting a bending angle of a workpiece in a press brake having an upper table and a lower table, comprising:
The bending angle detection unit includes a pair of plate-like support base portions that extend with the plate surfaces parallel and are attached to the lower table, and a pair of plate-like support base portions extending outward in the opposing direction of the pair of support base portions. and a pair of angle detection mechanisms which are movable and positionable. The pair of support bases are arranged opposite to each other with a gap that allows the insertion of the lower table, and are attached to the lower table via fastening means. and
a main frame extending in the extension direction; a pair of plate-like support frames attached to the main frame and extending with their plate surfaces parallel to each other and supporting the pair of support base portions; and a pair of supports. Using a mounting jig having a shipping block that connects the frames in opposite directions,
attaching the pair of support frames to the pair of support base portions of the bending angle detection unit;
a step of conveying 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;
placing the mounting jig on the lower table so that the shipping block abuts thereon, and arranging the bending angle detection unit with respect to the lower table;
attaching the pair of support bases to the lower table by the fastening means;
A method of mounting a bending angle detection unit, comprising removing the pair of support frames from the pair of support bases and removing the mounting jig. The fastening means comprises a screw hole formed in the head of a tightening bolt to which a tightening nut for attaching the 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 fasten them. 10. The mounting method of the bending angle detection unit according to claim 9, wherein the bending angle detection unit is attached to the lower table by positioning it in the front-rear direction of the lower table. The tightening nut and the tightening bolt are attached to the lower table so that they can be screwed/loosened,
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 a front tightening bolt of the lower table in the front-rear direction, and the screw hole of the tightening bolt is mounted. After screwing a mounting bolt to the front side support base portion, loosen the tightening bolt on the rear side of the lower table in the front-rear direction to move the head of the bolt to the rear side support of the bending angle detection unit. 11. The mounting method of the bending angle detection unit according to claim 10, wherein the mounting bolt is screwed into the threaded hole of the tightening bolt, and the mounting bolt is screwed into the screw hole of the tightening bolt. . After removing the mounting jig, the step of loosening a tightening nut attached to a tightening bolt on the rear side of the lower table in the front-rear direction and attaching a tightening plate to the rear side of the lower table. 12. The mounting method of the bending angle detection unit according to claim 10 or 11. The mounting method of the bending angle detection unit according to any one of claims 10 to 12, wherein the mounting jig has hanging means provided on the main frame. The main frame of the mounting jig has a jack receiving portion whose extension length is longer than the length in the extension direction of the bending angle detection unit, and which extends in one of the opposing directions at the center portion in the extension direction. has
3. In the step of transporting to the mounting position, the mounting jig is transported by a transport jig having a moving wheel and an elevating mechanism that supports and lifts the mounting jig by both end portions of the main frame and the jack receiving portion. 14. The mounting method of the bending angle detection unit according to any one of 9 to 13.

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