WO2019230909A1

WO2019230909A1 - Intermediate plate device

Info

Publication number: WO2019230909A1
Application number: PCT/JP2019/021597
Authority: WO
Inventors: 博勝鹿内; 洋平淵之上
Original assignee: 株式会社アマダホールディングス
Priority date: 2018-06-01
Filing date: 2019-05-30
Publication date: 2019-12-05
Also published as: JP2019209345A

Abstract

An intermediate plate device is provided with: an intermediate plate main body mounted on a lower portion of an upper table of a press brake; a pinching member for pinching a member to be pinched between the pinching member and the intermediate plate main body, the pinching member being attached to the intermediate main body; and an attachment mechanism for attaching the pinching member to the intermediate main body. The attachment mechanism is provided with: a bolt disposed on the intermediate plate main body and the pinching member so as to be penetrated therethrough in such a manner that a head portion of the bolt is disposed on one of the intermediate plate main body and the pinching member, and a shaft portion thereof is disposed on the other; a movable member which is screwed on a screw portion formed on the shaft portion of the bolt, and is provided movably along a shaft direction of the bolt in conjunction with a rotation of the shaft portion; and a fixed member fixed on a tip side of the shaft portion of the bolt.

Description

Intermediate plate device

The present invention relates to an intermediate plate device for clamping a member to be clamped such as an upper die in a press brake with an upper table.

Conventionally, as an upper mold holder (intermediate plate device) 100 used for a press brake for bending a workpiece plate W, as shown in FIG. 14, a bolt 103 screwed to an upper intermediate plate 101 or a lower intermediate plate 102 is used. , 104 and clamping rod members (clamping plates) 105, 106 are known to clamp and fix clamped members such as the upper portion 107 of the lower intermediate plate 102 and the upper portion 109 of the upper mold 108 (for example, , See Patent Document 1).

JP-A-5-305345

However, in the conventional upper mold holder 100 disclosed in Patent Document 1, when the

bolts

103 and 104 are loosened in order to replace the upper mold 108 and the lower intermediate plate 102, the

fastening rod members

105 and 106 are moved to the lower middle. The structure is easily separated from the plate 102 and the upper intermediate plate 101. As a result, the upper mold 108 and the lower intermediate plate 102 may fall carelessly. In such a structure, there is room for improvement in the positioning accuracy of the lower intermediate plate 102 and the upper mold 108 with respect to the upper intermediate plate 101 and the lower intermediate plate 102.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an intermediate plate device capable of improving the positioning accuracy of attachment of the sandwiched member and preventing inadvertent dropping.

An intermediate plate device according to the present invention includes an intermediate plate main body mounted on a lower portion of an upper table of a press brake, and a clamping member attached to the intermediate plate main body and sandwiching a sandwiched member between the intermediate plate main body and And an attachment mechanism for attaching the clamping member to the intermediate plate body, wherein the attachment mechanism has a head portion disposed on one side of the intermediate plate body and the sandwiching member and a shaft portion disposed on the other side. A bolt that is disposed through the intermediate plate body and the clamping member, and a screw portion that is formed on the shaft portion of the bolt and is screwed to the axial direction of the bolt in conjunction with the rotation of the shaft portion. And a fixed member fixed to the tip end side of the shaft portion of the bolt.

In one embodiment of the present invention, the movable member of the attachment mechanism is arranged so as not to rotate following the rotation of the shaft portion of the bolt.

In another embodiment of the present invention, a biasing mechanism that biases the movable member toward the fixed member is further provided.

In still another embodiment of the present invention, the biasing mechanism has a disc spring.

Still another embodiment of the present invention further includes a knock pin that is disposed through the intermediate plate body and the holding member and positions the intermediate plate body and the holding member.

In still another embodiment of the present invention, the clamping member includes a locking member that can be engaged with a fall prevention groove provided in the clamped member, and the locking member is provided on a plate surface of the upper table. In addition to being divided into a plurality of portions along the horizontal direction, each is urged toward the drop prevention groove.

According to the present invention, it is possible to improve the positioning accuracy of attachment of the sandwiched member and to prevent inadvertent dropping.

It is explanatory drawing which shows roughly the whole structure of the press brake with which the intermediate | middle board apparatus which concerns on one Embodiment of this invention was mounted | worn. It is a side view which abbreviate | omits some press brakes and shows schematically. It is a perspective view which shows the intermediate | middle board apparatus schematically. FIG. 2 is a cross-sectional view schematically showing a part of the cross-sectional shape along the line A-A ′ in FIG. It is a perspective view which shows the movable member used for the intermediate plate apparatus. FIG. 5 is a cross-sectional view schematically showing a part of the cross-sectional shape along the line B-B ′ of FIG. It is a perspective view which shows the urging mechanism used for the intermediate plate apparatus. FIG. 4 is a cross-sectional view schematically showing a part of the cross-sectional shape along the line C-C ′ of FIG. FIG. 4 is a cross-sectional view schematically showing a cross-sectional shape along a line D-D ′ in FIG. FIG. 5 is a cross-sectional view schematically showing a partially omitted state in which the bolt of the mounting mechanism is loosened in the intermediate plate device in the state shown in FIG. 4. FIG. 11 is a cross-sectional view schematically showing the intermediate plate device in the state shown in FIG. FIG. 12 is a cross-sectional view schematically showing a state in which a part of the intermediate plate device in the state shown in FIG. 11 when the punch is pulled out is omitted. FIG. 11 is a perspective view schematically showing the intermediate plate device in the state shown in FIG. 10 with a part omitted in a state in which the punch can be attached / pulled in the left-right direction. It is sectional drawing for demonstrating the conventional upper mold | type holder.

Hereinafter, an intermediate plate device according to an 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 all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

First, the overall configuration of the press brake 1 equipped with the intermediate plate device according to the present embodiment will be described with reference to FIGS. 1 and 2. Since the basic structure of the press brake 1 is known, only the outline will be described. In the following description, “X-axis direction” means the left-right direction in FIG. 1, “Z-axis direction” means the up-down direction in FIG. 1, and “Y-axis direction” is perpendicular to the paper surface in FIG. Means direction.

As shown in FIGS. 1 and 2, the press brake 1 includes a press brake main body 2 that performs bending of a workpiece plate (workpiece), and a control device 3 that performs overall control of the press brake main body 2. Is provided. The press brake main body 2 includes an upper table 4 and an upper table 4 arranged in the vertical direction (Z-axis direction) so that the

plate surfaces

4a and 5a intersecting the front-rear direction (Y-axis direction) face the front surface in the center of the front surface. A lower table 5 is provided.

The press brake body 2 supports the upper table 4 and the lower table 5 and includes support portions 6 arranged on the left and right sides. Further, the press brake body 2 includes a drive mechanism 7 configured to reciprocate the upper table 4 with respect to the lower table 5 along the vertical direction, for example.

The upper table 4 has at least one holder device 8 that detachably holds the intermediate plate device 10 according to the present embodiment at the lower portion thereof. The intermediate plate device 10 detachably holds the punch P of the molding die. In the present embodiment, the intermediate plate device 10 directly sandwiches the punch P and other upper molds. However, for example, the intermediate plate device 10 sandwiches a lower intermediate plate device (not shown), and the punch P passes through the lower intermediate plate device. Alternatively, the upper mold may be supported.

The lower table 5 has a lower mold holder 9 for holding a molding die D and other lower molds at the upper part thereof. As shown in FIG. 2, each support part 6 is comprised by the plate-shaped side frame formed in the substantially U shape, for example by side view. The drive mechanism 7 is, for example, a hydraulic cylinder serving as a drive source for the upper table 4, and is attached to the upper portion of each support portion 6. Each drive mechanism 7 is configured to reciprocate (up and down) the upper table 4 relative to the lower table 5 in the vertical direction.

The control device 3 is configured to execute operation control of each drive mechanism 7. The control device 3 includes an operation panel that is movably attached to the press brake main body 2 via a movable arm portion 3a. The operation panel displays, for example, various information such as the bending order of the plate material to be processed calculated by the operator of the press brake 1 and the mold made up of various punches and dies used for these.

As shown in FIG. 4, the holder device 8 at the lower part of the upper table 4 is attached to the upper table 4 by a mounting bolt 62 that is mounted in a direction perpendicular to the plate surface 4 a of the upper table 4, and the mounting bolt 62. And a plate-like fastening plate 63 having a longitudinal direction in the left-right direction (X-axis direction). On the inner side of the lower end of the fastening plate 63, there is provided an engagement protrusion 64 that protrudes toward the rear side in the front-rear direction (Y-axis direction) and extends in the left-right direction.

As shown in FIGS. 3 and 4, the intermediate plate device 10 at the lower part of the holder device 8 includes an intermediate plate main body 11 held by the holder device 8 attached to the upper table 4, and the longitudinal direction of the intermediate plate main body 11. A plate-like fastening plate 20 as a clamping member attached to the front side of the intermediate plate 11 and an attachment mechanism 30 for attaching the fastening plate 20 to the intermediate plate body 11. Details of each part of the intermediate plate device 10 will be described later.

The intermediate plate main body 11 of the intermediate plate device 10 includes a thick block portion 12 in the front-rear direction and an upper portion 13 protruding upward on the front side of the block portion 12, and the block portion 12 and the upper portion 13 are thick. Are formed in a substantially N-shaped cross section. As shown in FIG. 4, the block 12 of the intermediate plate body 11 is configured such that when the punch P is attached, the front pressing surface 12 c abuts the back surface 65 a of the upper portion 65 of the punch P and the lower surface 12 b is the upper surface of the punch P. Abuts with 65b. As a result, the punch P is positioned on the intermediate plate device 10. An accommodation hole 16 that can accommodate a movable body 32, a fixed body 33, and the like of an attachment mechanism 30 to be described later is formed at a predetermined position above the rear side of the block portion 12 of the intermediate plate body 11.

The upper part 13 of the intermediate plate main body 11 has a fall prevention groove part 14 formed so as to be recessed from the front side toward the rear side under the front side. Further, the upper portion 13 of the intermediate plate body 11 has an inclined surface 15 formed so as to spread forward and downward from the upper end portion 13a above the fall prevention groove portion 14.

As shown in FIG. 4, an engagement protrusion 64 formed on the fastening plate 63 of the holder device 8 is engaged with the fall prevention groove portion 14 of the upper portion 13 of the intermediate plate body 11. In addition, when attached to the holder device 8, the upper surface 12 a of the block portion 12 of the intermediate plate main body 11 and the lower surface 4 b of the upper table 4 abut, and the holding surface 4 c of the upper table 4 and the rear surface of the upper portion 13 of the intermediate plate main body 11 13b abuts. In this state, the fastening plate 63 is fastened to the upper table 4 by the mounting bolts 62, whereby the intermediate plate body 11 is positioned and fixed with respect to the upper table 4, and the intermediate plate device 10 is held by the holder device 8. The

On the other hand, the fastening plate 20 of the intermediate plate device 10 is formed in a plate shape having dimensions substantially equal to those of the intermediate plate body 11 in the left-right direction. The fastening plate 20 extends in the left-right direction on the inner side of the upper end of the fastening plate 21 and extends in the left-right direction on the inner side of the lower end. The locking plate 20 protrudes in the direction of the drop prevention groove 54 of the upper portion 65 of the punch P. And a protrusion 23.

The fastening plate 20 includes a pressing member 24 provided above the locking projection 23, and a locking member 26 provided below the pressing member 24 between the locking projection 23 and the pressing member 24. Have A bolt hole 17a in which a head portion 35 of a bolt 31 of the mounting mechanism 30 described later is received is formed at a predetermined position above the front side of the fastening plate 20.

The engagement protrusion 21 of the fastening plate 20 engages with an engagement groove portion 18 formed below the fall prevention groove portion 14 of the upper portion 13 on the front side of the block portion 12 of the intermediate plate body 11. The locking projection 23 of the fastening plate 20 is disposed so as to be locked in the drop prevention groove 54 of the punch P. The pressing member 24 of the fastening plate 20 presses the upper portion 65 toward the block portion 12 of the intermediate plate body 11 by bringing the inclined surface 24a into contact with the inclined surface 55 of the upper portion 65 of the punch P.

Note that the pressing member 24 of the fastening plate 20 has a shape in which, for example, a part of the circumferential surface of a cylinder is processed into a flat surface to form the inclined surface 24a, and the fastening plate 20 is connected to the fastening plate 20 via a plurality of screws 25. It is attached so as to be slightly rotatable. For this reason, the inclined surface 24 a comes into surface contact with the inclined surface 55 of the punch P. The locking member 26 of the fastening plate 20 is a so-called wedge piece, and is provided so as to be able to advance and retract so as to be engageable with the fall prevention groove 54 of the punch P. The locking member 26 is divided into a plurality of parts in the horizontal direction (left-right direction) along the plate surface 4 a of the upper table 4, for example, and each of the locking members 26 is elastic such as a coil spring interposed between the fastening plates 20. The elastic force of the member 27 urges the drop prevention groove portion 54 so as to engage with it.

The movement of the locking member 26 due to the urging force of the elastic member 27 is restricted by a part of the locking member 26 coming into contact with a part of the pressing member 24. An inclined surface 26 a is formed on the front end side of the locking member 26 in the projecting direction so as to incline from the upper side to the lower side and to come into contact with the upper groove end edge (edge portion) of the fall prevention groove portion 54.

And the attachment mechanism 30 of the intermediate | middle board apparatus 10 is provided with two or more by predetermined spacing in the left-right direction, as shown in FIG. The attachment mechanism 30 penetrates the intermediate plate main body 11 and the fastening plate 20 (clamping member) so that the head 35 is arranged on the intermediate plate main body 11 side and the shaft portion 36 is arranged on the fastening plate 20 (clamping member) side. A bolt 31 is provided. The bolt 31 is disposed through the through hole 17 formed in the intermediate plate body 11 and communicating with the bolt hole 17 a of the fastening plate 20. In addition, the attachment mechanism 30 is screwed and arranged in a threaded portion 37 formed on the shaft portion 36 of the bolt 31, and in conjunction with the rotation of the shaft portion 36, the axial direction (front-rear direction (Y-axis direction) of the bolt 31. )). A movable body 32 is provided as a movable member provided so as to be movable along the line. Furthermore, the attachment mechanism 30 includes a fixed body 33 that is fixed to the distal end side of the shaft portion 36 of the bolt 31. The fixed body 33 is fixed to the shaft portion 36 of the bolt 31 by a fixing screw 38, for example.

4, the punch P is positioned with respect to the intermediate plate main body 11 of the intermediate plate device 10 as described above, and the bolt 31 of the attachment mechanism 30 is engaged with the fastening plate 20. By tightening and fastening the fastening plate 20 to the intermediate plate body 11, the punch P is clamped and fixed to the intermediate plate device 10.

Further, in the present embodiment, a cylindrical stopper member 22 interposed between the block portion 12 of the intermediate plate body 11 and the fastening plate 20 around the shaft portion 36 on the bottom surface side of the head portion 35 of the bolt 31. May be arranged. The stopper member 22 is provided for the purpose of preventing excessive tightening of the bolt 31 by contacting the bottom surface of the head portion 35 of the bolt 31, but in the intermediate plate device 10 to which the present invention is applied. Not a required configuration.

Further, in the present embodiment, as a biasing mechanism that biases the movable body 32 toward the fixed body 33 between the hole bottom surface of the accommodation hole 16 of the block portion 12 of the intermediate plate body 11 and the movable body 32. A plurality of disc springs 34 are arranged. The operation of the attachment mechanism 30 configured with the disc spring 34 will be described later.

The punch P sandwiched between the intermediate plate devices 10 includes the upper portion 65 described above. The upper part 65 of the punch P has the same outer shape as the upper part 13 of the intermediate plate main body 11, and a drop prevention groove part 54 formed so as to be recessed below the front side, and an upper end part 53 a above the drop prevention groove part 54. And an inclined surface 55 formed so as to spread forward and downward.

The attachment mechanism 30 of the intermediate plate device 10 is provided so as to prevent the punch P from being inadvertently detached from the intermediate plate device 10 and falling when it is loosened from the intermediate plate body 11 when the fastening plate 20 is loosened. . Here, the movable body 32 of the attachment mechanism 30, the fixed body 33, and the disc spring 34 as an urging mechanism will be described.

As shown in FIG. 5, the movable body 32 includes a cylindrical sleeve portion 32 a disposed toward the bottom surface of the accommodation hole 16 and a long round (elliptical plate) main body portion 32 b. On the inner peripheral surface of the sleeve portion 32a, a screw portion 32c that can be screwed into the screw portion 37 of the shaft portion 36 of the bolt 31 is formed. Although not shown, the fixed body 33 is formed in an annular shape that can rotate together with the shaft portion 36 of the bolt 31, for example.

In addition, the accommodation hole 16 is formed in an oval shape (elliptical shape) according to the external shape of the main-body part 32b of the movable body 32, as shown in FIG. As described above, the main body portion 32b and the accommodation hole 16 are formed in shapes that are compatible with each other, so that the movable body 32 of the attachment mechanism 30 is not rotated by following the rotation of the shaft portion 36 of the bolt 31. The intermediate plate body 11 is disposed in the block portion 12.

Further, as shown in FIG. 7, the disc spring 34 is a disc-like elastic body in which a plurality of elastic pieces 34a divided by slits are connected by an annular portion 34b. Can be overlaid. The biasing mechanism is not an essential component of the mounting mechanism 30 of the present embodiment, but can be employed to make the operation of the mounting mechanism 30 more reliable. It can be constituted by an elastic body such as. As this disc spring 34, the type having no slit as described above may be used.

As shown in FIGS. 3 and 8, the intermediate plate device 10 is disposed through

holes

29 a and 29 b formed in the intermediate plate main body 11 and the fastening plate 20. A knock pin 28 for positioning is further provided. The knock pin 28 is inserted into the hole 29b of the fastening plate 20 in order to maintain the engagement position by the engagement groove portion 18 of the intermediate plate main body 11 and the engagement protrusion 21 of the fastening plate 20, and then the hole of the intermediate plate main body 11 is inserted. For example, a plurality of press mechanisms 29 are provided between the mounting mechanisms 30 in the left-right direction.

Further, as shown in FIGS. 3 and 9, the intermediate plate device 10 prevents the bolt 31 from rattling when the bolt 31 is loosened beyond the elastic repulsion range of the disc spring 34. A plurality of spare coil springs 39 arranged between the fastening plates 20 are provided between the intermediate plate main body 11 and the fastening plates 20 in the vicinity of both ends in the left-right direction, for example.

Next, the operation of the attachment mechanism 30 when the intermediate plate device 10 is in use will be described with reference to FIGS. 4 and 10 to 12.
[attachment]
First, attachment of the punch P will be described. When the punch P is set in the intermediate plate device 10 and the bolt 31 of the mounting mechanism 30 is tightened, the movable body 32 compresses the disc spring 34 with the main body 32b as the shaft portion 36 of the bolt 31 rotates. While moving from the fixed body 33 to the front side.

In the state shown in FIG. 4, the bolt 31 of the mounting mechanism 30 is tightened to the full. At this time, the disc spring 34 is compressed most, the end of the sleeve portion 32 a of the movable body 32 contacts the bottom surface of the accommodation hole 16, and the bottom surface of the head portion 35 of the bolt 31 contacts the stopper member 22. For this reason, the movable body 32 does not move further forward, and the fastening plate 20 is positioned and fixed to the intermediate plate body 11 by the attachment mechanism 30 without rattling.

At this time, the intermediate plate body 11 of the intermediate plate device 10 has the pressing surface 12c and the lower surface 12b in contact with the back surface 65a and the upper surface 65b of the upper portion 65 of the punch P, respectively, and the fastening plate 20 is an inclined surface of the pressing member 24. 24a and the inclined surface 26a of the locking member 26 are in contact with the inclined surface 55 of the upper portion 65 of the punch P and the groove end edge portion of the drop preventing groove portion 54, respectively. Therefore, the punch P is clamped by the intermediate plate device 10 as described above.

[removal]
Next, removal of the punch P will be described. When the bolt 31 of the attachment mechanism 30 is loosened from the state in which the punch P is attached to the intermediate plate device 10, the movable body 32 approaches the fixed body 33 as the shaft portion 36 of the bolt 31 rotates. Moving. At this time, the disc spring 34 presses the main body portion 32 b of the movable body 32 toward the fixed body 33 while extending. Accordingly, since the bolt 31 is loosened while the head 35 is pressed against the stopper member 22, the bolt 31 does not rattle while the bolt 31 is loosened, and the fastening plate 20 is the intermediate plate main body. 11 is maintained.

In the state shown in FIG. 10, the bolt 31 of the mounting mechanism 30 is loosened to the full. At this time, the disc spring 34 is extended most, and the main body portion 32 b of the movable body 32 contacts the fixed body 33. For this reason, the fixed body 33 functions as a stopper, and the movable body 32 is prevented from further moving backward. At this time, since the bolt 31 is still pulled backward by the disc spring 34, the fastening plate 20 is engaged without being separated from the intermediate plate body 11.

In addition, the preliminary coil spring 39 shown in FIG. 9 allows the fastening plate 20 to be attached to the intermediate plate main body when the moving range of the movable body 32 to the rear side exceeds the dimension when the disc spring 34 is extended most. 11, the pressing plate 20 is provided in order to bring the fastening plate 20 into close contact with the head portion 35 of the bolt 31 and to prevent the bolt 31 from rattling.

As described above, even when the bolt 31 of the mounting mechanism 30 is loosened to the full extent, the sandwiched state of the punch P by the intermediate plate body 11 and the fastening plate 20 is maintained, so that the lower intermediate plate device 50 may be rattled or inadvertently. It is possible to prevent the intermediate plate device 10 from falling off and falling. In addition, in order to remove the punch P from the intermediate plate apparatus 10 from this state, when the fastening plate 20 is moved forward, it becomes as shown in FIG.

That is, when the fastening plate 20 is moved forward as indicated by an arrow in the figure, the inclined surface 24a of the pressing member 24 of the fastening plate 20 is separated from the inclined surface 55 of the punch P, but the locking member 26 is the elastic member 27. Because of this elastic force, it projects toward the fall prevention groove 54, so that the engaged state between the inclined surface 26a and the groove edge of the fall prevention groove 54 is maintained. For this reason, even in this case, the punch P does not inadvertently come off the intermediate plate device 10 and fall.

Then, as shown in FIG. 12, in order to remove the punch P from the intermediate plate device 10 from this state, when the punch P is moved downward as shown by an arrow in the figure, the groove edge of the fall prevention groove 54 is The punch P can be removed downward by pushing the inclined surface 26a to push the locking member 26 back toward the elastic member 27 and finally over the locking projection 23. When attaching the punch P to the intermediate plate device 10, the upper portion 65 of the punch P is inserted between the intermediate plate main body 11 and the fastening plate 20 with the bolt 31 loosened to the full, contrary to the above-described removal procedure. The bolt 31 may be tightened after positioning as described above.

In addition, attachment / detachment of the punch P to the intermediate plate apparatus 10 can also be performed as follows.
In the state shown in FIG. 10 in which the bolt 31 of the attachment mechanism 30 is fully loosened, the bolt 31 is pulled backward by the disc spring 34 and the fastening plate 20 is engaged without being separated from the intermediate plate body 11. It has become. At this time, the punch P is sandwiched by the intermediate plate body 11 and the fastening plate 20 so as to be laterally movable (slidable) only in the X-axis direction (left-right direction). For this reason, as shown in FIG. 13, the punch P can be laterally moved from the side of the intermediate plate device 10 to be attached to the intermediate plate device 10 or removed from the intermediate plate device 10 to the side. Even in this case, the intermediate plate body 11, the fastening plate 20, and the attachment mechanism 30 can reliably prevent the punch P from being inadvertently dropped or rattling.

As described above, according to the intermediate plate device 10 according to the present embodiment, the attachment mechanism 30 sandwiches the fastening plate 20 and the intermediate plate main body 11 between the head portion 35 of the bolt 31 and the movable body 32. Since the upper portion 65 of the punch P is interposed between the fastening plate 20 and the intermediate plate main body 11, the positional accuracy of the attachment of the punch P can be improved. Further, since the attachment mechanism 30 has a structure that can prevent the bolt 31 and the fastening plate 20 from rattling, it is possible to prevent inadvertent dropping of the sandwiched member such as the punch P. Further, if the mounting mechanism 30 includes the disc spring 34, the disc spring 34 biases the movable body 32 toward the rear side, so that the bolt 31 is further less likely to loosen, and the rattling of each part is more effectively prevented. It becomes possible to do.

As mentioned above, although embodiment of this invention was described, this embodiment is shown as an example and is not intending limiting the range of invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

For example, in the above embodiment, the main body portion 32b of the movable body 32 of the attachment mechanism 30 and the accommodation hole 16 are each formed in an oval shape (elliptical shape). The main body 32b and the accommodation hole 16 may be of various types as long as the movable body 32 is not rotated by following the rotation of the shaft portion 36 of the bolt 31, such as a semicircular shape or a polygonal shape. Can take shape.

In the above embodiment, the bolt 31 of the attachment mechanism 30 is arranged such that the head portion 35 is disposed on the intermediate plate body 11 side and the shaft portion 36 is disposed on the fastening plate 20 (clamping member) side. However, the present invention is not limited to this. For example, the bolt 31 of the attachment mechanism 30 is arranged such that the head portion 35 is disposed on the fastening plate 20 (clamping member) side and the shaft portion 36 is disposed on the intermediate plate body 11 side. It is good also as a structure penetrated by the clamping member.

DESCRIPTION OF SYMBOLS 1 Press brake 4 Upper table 5 Lower table 8 Holder apparatus 10 Intermediate board apparatus 11 Intermediate board main body 12

Block part

13,65

Upper part

14,54 Fall

prevention groove part

15,55 Inclined surface 16 Accommodating hole 20 Fastening plate (clamping member)
21, 64 Engagement ridge 23 Engagement protrusion 24 Pressing member 26 Engagement member 28 Knock pin 30 Attachment mechanism 31 Bolt 32 Movable body (movable member)
33 Fixed body (fixing member)
35 Head portion 36 Shaft portion 37 Screw portion 39 Spare coil spring P Punch (member to be clamped)
65a back 65b top

Claims

An intermediate plate body mounted on the lower part of the upper table of the press brake;
A sandwiching member attached to the intermediate plate body and sandwiching a sandwiched member with the intermediate plate body;
An attachment mechanism for attaching the clamping member to the intermediate plate body,
The attachment mechanism is
A bolt disposed through the intermediate plate body and the sandwiching member so that a head is disposed on one side of the intermediate plate body and the sandwiching member and a shaft portion is disposed on the other side;
A movable member that is screwed and arranged in a screw portion formed on the shaft portion of the bolt, and is movable along the axial direction of the bolt in conjunction with the rotation of the shaft portion;
An intermediate plate device comprising: a fixing member fixed to a front end side of the shaft portion of the bolt.
The intermediate plate device according to claim 1, wherein the movable member of the attachment mechanism is arranged so as not to rotate following the rotation of the shaft portion of the bolt.
The intermediate plate device according to claim 1, further comprising a biasing mechanism that biases the movable member toward the fixed member.
The intermediate plate device according to claim 3, wherein the urging mechanism includes a disc spring.
The intermediate plate device according to any one of claims 1 to 4, further comprising a knock pin that is disposed through the intermediate plate main body and the holding member and positions the intermediate plate main body and the holding member. .
The clamping member includes a locking member that can be engaged with a fall prevention groove provided in the clamped member,
The locking member is provided by being divided into a plurality of parts in the horizontal direction along the plate surface of the upper table, and each of the locking members is urged toward the drop prevention groove part. The intermediate plate device according to any one of the above.