JP2007203344A - Upper die holder device for press brake - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To clamp all of two or more kinds of upper dies 100 in which the shapes of the parts 100a to be supported are different. <P>SOLUTION: A lengthwise pressing flat part c5a face-contacted with a lengthwise face e4 to be pressed in the part 100a to be supported in the upper die 100 is formed on the lowest part of the lengthwise face c2 on the side of a supporting sheet part in an upper part pressing member 3a. Further, straight bar member supporting grooves c7a are formed at the parts in the right and left directions in the halfway of the length in the upper and lower directions of the lengthwise pressing flat part c5a. Into each bar member supporting groove c7a, a straight bar member 18a with a specified cross-sectional shape corresponding to the cross-sectional shape of the locking groove e3 in the part 100a to be supported of the upper die 100 is inserted so as to be displaceable within a fixed range in the cross direction f1 crossed with the lengthwise pressing flat part c5a also in a state of being energized to the side of the part 100a to be supported by elasticity means 19. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an upper mold holder device used for a press brake, and more particularly, to relax restrictions on the shape of an upper mold supported portion that can be attached to the upper mold holder apparatus.

  As a press brake, for example, those disclosed in Patent Documents 1 and 2 exist, and a schematic configuration thereof includes an upper table and a lower table facing each other vertically, One of the table and the lower table is driven up and down.

When a plate-like workpiece is bent using this press brake, an upper die is attached to the lower portion of the upper table, and a lower die is attached to the upper portion of the lower table.
Then, the workpiece positioned between the upper mold and the lower mold is bent by moving the movable table up and down to engage the upper mold and the lower mold.

  In this type of press brake, for example, it is necessary to replace the upper die depending on the bent shape of the workpiece. Therefore, a large number of upper die holder devices are fixed to the lower part of the upper table, and the large number of upper die holders are fixed. The upper mold is detachably supported by the apparatus.

  The upper mold holder device includes a holder main body to be attached to the upper table, a support plate portion extending downward from the lower surface of the holder main body, and pressing the upper mold supported portion against the support plate portion, And an upper mold pressing member that supports the upper mold in a sandwiched manner. The upper mold that can be supported by the upper mold has a shape of the supported portion of the holder main body and the support plate portion. In addition, it is limited to those conforming to the form of the upper mold pressing member, and in general, the actual situation is that it is prepared in advance as a dedicated product.

Japanese Patent Laid-Open No. 7-60361 JP-A-8-33992

  As described above, the conventional upper mold holder device is generally designed to support only the upper mold dedicated to the upper mold holder apparatus. Therefore, for example, an upper mold provided with a different type of supported portion is used for processing a workpiece. When it must be used, it is necessary to replace the upper holder device mounted on the upper table with one corresponding to the above-mentioned other upper mold, which hinders work efficiency. It has become.

  The present invention provides an upper holder device for a press brake that can cope with such problems, and further allows the upper pressing member to be easily moved close to and away from the support plate portion. Objective.

  In order to achieve the above object, according to the present invention, as described in claim 1, the support plate portion formed at the lower portion of the holder main body to be attached to the upper table, and the upper mold supported portion are pressed against the support plate portion. An upper mold holder device for a press brake having an upper mold pressing member that sandwiches the upper mold with the support plate portion, wherein the upper mold is disposed at the lowermost portion of the upper mold-side vertical surface of the upper mold pressing member. A vertical pressing plane portion that is in surface contact with the vertical pressed surface portion of the supported portion is formed, and a straight bar member supporting groove is formed at a position in the left-right direction in the middle of the vertical length of the vertical pressing plane portion. The straight rod member having a specific cross-sectional shape corresponding to the cross-sectional shape of the locking groove of the supported portion of the upper mold is constant in the front-rear direction perpendicular to the vertical pressing flat surface portion. It can be displaced within the range and is urged by the elastic means toward the supported part side. And it is characterized in configurations that are fitted state.

The present invention is preferably embodied as follows.
That is, as described in claim 2, a cam member is rotatably attached to the upper mold pressing member via a shaft member, and an operation lever is provided for rotating the cam member. Provided is a pressing force generating means that receives a displacement related to the rotation of the member and applies a specific direction pressing force of a size related to the displacement to the cam member, and the operation lever is operated around the shaft member. Then, the upper mold pressing member is displaced in the front-rear direction corresponding to the operation amount, and the supported portion is pressed toward the support plate portion with a pressing force having a magnitude corresponding to the operation amount. .

  According to a third aspect of the present invention, when the operation lever is directed in the left-right direction around the shaft member that is vertically oriented, the upper pressing member has a specific size as the support plate portion. When the free end portion of the operation lever is swung around the shaft member to the side away from the supported portion, the upper die holding member is separated from the supported portion. It is configured to be displaced to the side.

According to the present invention, the following effects can be obtained.
That is, according to the first aspect of the present invention, any of a plurality of types of upper molds having different shapes of supported parts can be easily clamped or removed outward without removing or replacing the component parts. This makes it possible to improve the efficiency of work by the press brake.
More specifically, the upper mold supported part may have a locking structure, or may have no locking structure, or may have a plurality of types having different surface shapes such as those having an inclined surface or not. Any of the molds can be easily clamped.

  According to the second aspect of the present invention, the upper die is clamped between the upper die pressing member and the support plate portion or the upper die thus clamped is unclamped by the swinging operation of the operation lever. It is easy to apply operating force to the operating lever, and if the operating lever is operated to swing horizontally, the vertical space of the operating lever can be reduced, and the operating lever can be moved up and down. If the swing operation is performed, the space in the left-right direction of the operation lever can be reduced.

  According to the invention of claim 3, the same effect as that of the invention of claim 2 is obtained and the following effect is obtained, that is, the upper mold pressing member in the swinging direction of the operation lever. Therefore, it is difficult for the operation lever to be erroneously operated.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.
1 is a front view of an upper mold holder device according to the present invention, FIG. 2 is a cross-sectional view showing x1-x1 portion of FIG. 1, FIG. 3 is a view showing x2-x2 portion of FIG. FIG. 5 is a diagram illustrating a state in which the operation lever of the holder device is operated to the clamp position, FIG. 5 is a diagram illustrating a state in which the operation lever is operated within the intermediate operation range, and FIG. In the figure, B is a front view, FIG. 7 is a view showing an upper mold to be mounted on the upper mold holder device, A is a view showing a part having no locking groove in the supported part, and B is locked in the supported part. FIG. 8 is a view showing an object having a groove but no inclined surface, C is a view showing a supported portion having a locking groove and an inclined surface, and FIG. 8 is an upper view of the upper mold holder device shown in FIG. FIG. 9 is a view showing a state in which the mold is mounted, and FIG. 9 is a view showing a state in which the upper mold shown in C in FIG. 7 is mounted on the upper mold holder device.

  As shown in FIGS. 1 to 5, the upper holder device according to the present invention includes a support plate portion 1 </ b> A formed on the lower portion of the holder body 1 attached to the upper table of the press brake, and front and rear of the support plate portion 1 </ b> A. A pair of upper mold pressing members 3a that are arranged and press the supported part 100a of the upper mold 100 against the support plate part 1A so as to sandwich the upper mold 100 and support the support plate part 1A. 3b.

  The holder main body 1 is coupled to a main body 1a having a rectangular cross section with a relatively large thickness f1 in the front-rear direction and a center position of the front-rear direction f1 thickness on the lower surface of the main body top 1a. And a main body intermediate portion 1b having a rectangular cross section which is smaller than that of the uppermost portion 1a.

  The support plate portion 1A has a front-rear direction f1 thickness smaller than that of the main body intermediate portion 1b, and is coupled to the center position of the lower surface of the main body intermediate portion 1b in the front-rear direction f1 thickness. Both a1 and rear surface a2 are vertical planes.

  A through-hole b1 in the front-rear direction f1 is formed in the upper part of the center position of the main body uppermost portion 1a in the left-right direction f2, and the pressing force generating means 4 is built in the through-hole b1. This pressing force generating means 4 is formed in the same manner as the technique disclosed in Patent Document 1, and pushes and displaces the elastic member 4a against the elastic force from each of the front end face side and the rear end face side of the through hole b1. The elastic body 4a can be changed and the amount of compression of the elastic body 4a can be adjusted. The front surface portion 4b1 is pressed from the front end surface side of the through hole b1, and the rear surface portion 4b2 is pressed from the rear end surface side of the through hole b1. The amount of compression of the elastic member 4a changes corresponding to the pressing force. Bolt holes b2 and b2 are formed in upper portions near the left and right ends of the uppermost body 1a. Bolts for fixing the uppermost body 1a to the upper table of the press brake are inserted into the bolt holes b2 and b2. The

As shown in FIG. 2, each of the pair of upper mold pressing members 3a and 3b is engaged with the holder main body 1 in a state in which slight swinging is allowed via the corresponding fulcrum means 5A and 5B. .
The fulcrum means 5A that supports the upper die holding member 3a is provided with a bolt 7 that is inserted into a through hole b3 formed in the intermediate portion 1b of the main body and fixed in a fastening manner with a nut 6. The stepped through-hole c1 formed at a substantially central position in the vertical direction is inserted so as to be slightly movable, and the bolt head 7a is positioned inside the large-diameter hole c1a of the through-hole c1 so as to have a large-diameter hole. A concave spherical washer 8 is positioned on the annular bottom surface of c1a, and a convex spherical ring body 9 is interposed between the concave spherical washer 8 and the bolt head 7a, thereby forming a concave spherical surface of the concave spherical washer 8. A convex spherical surface of the convex spherical ring body 9 is supported, and a compression spring 10 is externally fitted to a bolt 7 portion between the front surface b4 of the main body intermediate portion 1b and the rear surface c2 of the upper mold pressing member 3a. Under the state in which the upper mold pressing member 3a is repressed toward the front f1a. The mold pressing member 3a is configured to swing along the longitudinal longitudinal surface in a state of low resistance by the guiding action of the concave spherical surface of the concave spherical washer 8 and the convex spherical surface of the convex spherical ring body 9. Yes.

  As shown in FIG. 3, the fulcrum means 5B supporting the other upper mold pressing member 3b has a slight gap between the front side of the through hole b5 formed in the main body intermediate portion 1b and the through hole b5. Then, the bolt 11 is inserted to position the bolt head 11a on the front side of the main body intermediate portion 1b, and the front end of the bolt 11 is inserted into a screw hole d1 formed at a substantially central position in the vertical length of the upper pressing member 3b. A concave spherical washer 12 is brought into contact with the front surface of the intermediate part 1b of the main body, and a convex spherical ring body 13 is interposed between the concave spherical washer 12 and the bolt head 11a to form a concave spherical washer. The convex spherical surface of the convex spherical ring body 13 is supported by the 12 concave spherical surfaces, and the compression spring 14 is externally fitted to the bolt 11 portion between the rear surface of the main body intermediate portion 1b and the front surface d2 of the upper pressing member 3b. The compression spring 14 moves the upper die holding member 3b behind Under the state of being pressed to f1b, the upper mold pressing member 3b is along the longitudinal longitudinal surface in a state where there is little resistance due to the guiding action of the concave spherical surface of the concave spherical washer 12 and the convex spherical surface of the convex spherical ring body 13. And is configured to be swung.

  In addition, a through hole c3 having a diameter larger than that of the bolt head 11a is formed at a position facing the bolt head 11a in the upper mold holding member 3a. Is possible.

  Further, the upper ends of the upper mold pressing members 3a and 3b are placed at positions above the fulcrum means 5A and 5B between the upper portion of the upper mold pressing members 3a and 3b and the main body uppermost part 1a. Repressing means 15A and 15B are formed to press so as to be close to each other.

One of the elastic pressure means 15A is formed with a stepped through hole c4 facing front and rear at a location near the upper part of the upper mold holding member 3a, and a bolt 16 is inserted into the through hole c4 with a slight gap between them. 16a is positioned in the large-diameter through-hole portion, the tip of the bolt 16 is screwed onto the front surface b4 of the uppermost body 1a, and compressed between the bolt head 16a and the bottom surface of the large-diameter through-hole portion of the through-hole c4. The spring 17 is mounted, and the upper end of the upper mold pressing member 3a is biased toward the side close to the main body uppermost portion 1a by the elasticity of the compression spring 17.
The other repressing means 15B has a symmetric structure with respect to the repressing means 15A, and substantially the same members are denoted by the same reference numerals and description thereof is omitted.

The above-described configuration is substantially the same as the techniques shown in Patent Documents 1 and 2, and the characteristic configuration according to the present invention will be described below.
A vertical pressing flat surface portion c5a that is in surface contact with the vertical pressed surface portion e1 of the supported portion 100a of the upper mold 100 is formed at the lowermost portion of the surface of the upper mold pressing member 3a, 3b on the holder body 1 side. Straight bar member supporting grooves c6a and c6b having a quadrangular cross section are formed in the left and right positions forming the midway position in the vertical length of the vertical pressing flat portions c5a and c5b of the upper mold pressing members 3a and 3b.

  In the straight bar member support grooves c6a, c6b, a straight bar member 18a having a specific cross-sectional shape corresponding to the cross-sectional shape of the locking groove e3 (see FIG. 7) formed in the supported portion 100a of the upper mold 100, 18b is fitted in a state in which it can be displaced in the front-rear direction f1 perpendicular to the corresponding vertically-oriented pressing plane portions c5a, c5b and is urged by a compression spring 19 as an elastic means toward the supported portion 100a. Yes.

  Each of the straight bar members 18a and 18b is formed with a recessed hole for embedding the compression spring 19 on the surface opposed to the bottom surface of the straight bar member supporting grooves c6a and c6b fitted therein. The outer end of the compression spring 19 inserted in is supported by the bottom surfaces of the straight rod member support grooves c6a and c6b fitted therein, and the longitudinal direction of the bottom surfaces of the straight rod member support grooves c6a and c6b Front and rear stepped through holes c7a and c7b are formed at appropriate intervals, and the stepped through holes c7a and c7b are formed on the outer side of the corresponding upper mold pressing member 3a or 3b as large diameter through holes. The bolts 20 are inserted into the stepped through holes c7a and c7b from the outer side, and the heads of the bolts 20 are positioned in the large diameter through holes of the stepped through holes c7a and c7b. The tip is in the screw hole of the straight rod members 18a, 18b They are wearing. Accordingly, each of the straight bar members 18a and 18b is in a state where it is properly projected from the corresponding vertical pressing flat surface portions c5a and c5b to the support plate portion 1A side by the elasticity of the compression spring 19 as shown in FIG. The rod-shaped member support grooves c6a and c6b are stably supported.

  Further, a through hole c8 having a rectangular cross section that is long in the left-right direction f2 is formed in the upper part of the front upper mold holding member 3a, and a cam member 21 with an operation lever 21a is inserted into the through hole c8. The cam member 21 is attached to the upper mold pressing member 3a via a vertically oriented shaft member 22 so as to be horizontally rotatable. At this time, the cam member 21 is formed with a rotation center hole g2 at a position eccentric with respect to the center of curvature O1 of the arcuate outer peripheral surface g1 as shown in FIG. 6, and the shaft member 22 is inserted into the rotation center hole g2. The When the lever portion 21b of the operating lever 21 is positioned at the clamp position p1 in the left-right orientation, the outer peripheral surface g1 of the cam member 21 protrudes most outward from the vertical surface c2, and conversely, the lever portion 21a is When positioned in the intermediate operation range H from the position p2 horizontally swung from the left and right posture position p1 as shown in FIG. 4 by a predetermined angle (for example, 45 degrees) to the specific rocking position p3, The outer peripheral surface of the cam member 21 protrudes outward from the vertical surface c2 on the holder main body 1 side of the upper mold pressing member 3a by an intermediate fixed angle.

  A straight groove h1 is formed on one surface of the proximal end side of the operation lever 21a, and a locking member 22 is fitted into the straight groove h1, and one end of the engagement member 22 is interposed via the fulcrum shaft 23. The other end is biased downward by the elasticity of the spring 24, and the locking member 22 projects the other end outward by the elasticity of the spring 24 in its free state. On the other hand, when the other end is pressed from the outside, the whole is immersed in the straight groove h1.

  Therefore, when the operation lever 21a is operated from the clamp position p1 to the larger operation angle, the other end of the locking member 22 comes into contact with the surface of the upper mold pressing member 3a and further operation is restricted. Therefore, the position of the operation lever 21a at this time is the maximum operation position of the intermediate operation range H, and the operation member 21a is prevented from being inadvertently operated beyond the intermediate operation range H by the locking member 22. Is done. When the operation lever 21a is to be swung beyond the intermediate operation range H, the operation lever 21a is held in a state where the other end of the locking member 22 is pressed with a finger and the locking member 22 is immersed in the straight groove h1. Is further swung. As a result, the outer peripheral surface g1 of the cam member 21 protrudes the smallest outward from the vertical surface c2 on the holder body 1 side of the upper mold pressing member 3a.

  There are a plurality of types of upper molds 9 as shown in FIG. Each of the upper molds 100 serves as a workpiece machining unit 100b that performs bending of the workpiece W in cooperation with the lower mold having the lower half mounted on the lower table of the press brake, and the upper end of the workpiece machining unit 100b. Includes a contact surface e2 that contacts the lower end surface i1 of the support plate portion 1A, and a portion protruding upward from the contact surface e2 serves as a supported portion 100a, and the supported portion 100a includes the support plate portion 1A. A vertical sliding contact surface e4 slidably contacting the front surface a1 or the rear surface a2 is formed.

  The supported portion 100a in the upper mold 100 shown in FIG. 7A is provided with a plane e5 parallel to the sliding contact surface e4 and substantially the same size as the sliding contact surface e4 on the opposite side of the sliding contact surface e4. Further, the supported portion 100a of the upper mold 100 shown in FIG. 7B includes a plane e6 parallel to the sliding contact surface e4 and slightly smaller than the sliding contact surface e4 on the opposite side of the sliding contact surface e4. The left and right engaging grooves 2 are formed at the lower end of e6, and the supported portion 100a of the upper mold 100 shown in FIG. 7C has a sliding contact surface 3e on the opposite side of the sliding contact surface e4. Is provided with a plane e7 having a vertical width that is significantly smaller than the vertical length of the slidable contact surface 3e, and a horizontal locking groove e3 is formed at an intermediate position in the vertical direction of the plane e7. An inclined surface e8 is formed on the upper side.

In the above configuration, when the upper mold 100 is detached from the upper mold holder device, the following operation is performed to attach the upper mold 100 to the upper mold holder device.
First, the case where the upper mold | type 100 shown to A in FIG. 7 is mounted | worn is demonstrated.

  The locking member 22 of the operation lever 21a is immersed in the straight groove h1, and the operation lever 21a is swung to the unclamping position p5 (see FIG. 5) exceeding the intermediate operation range H. In this state, the elastic force of the elastic means 17 and the elastic force of the spring 10 of the elastic pressure means 15A act on the upper mold pressing member 3a, and the amount of protrusion of the cam member 21 toward the holder body 1 is minimized. The portion 1A and the lower end portion of the upper die pressing member 3a are in a state of being sufficiently larger than the thickness in the front-rear direction of the supported portion 100a of the upper die 100. More specifically, the front-rear distance between the front surface a1 of the support plate portion 1A and the rear surface of the free straight bar member 18a of the upper pressing member 3a is slightly larger than the front-rear thickness of the supported portion 100a.

  Under this state, the supported portion 100a is inserted between the support plate portion 1A and the upper mold pressing member 3a from below, and the operation lever 21a is illustrated in the left-right orientation under the inserted state. 4 is positioned at a clamp position p1. As a result, the outer peripheral surface g1 of the cam member 21 is projected to the largest extent toward the holder body 1, and the front end surface 4b1 of the pressing force generating means 4 is pushed and displaced. The amount of compression of the elastic member 4a is increased.

Accordingly, the pressing force generating means 4 applies a forward pressing force according to the compression amount of the elastic member 4a to the cam member 21 to move the upper end of the upper mold pressing member 3a to the front f1a. Since the upper mold pressing member 3a is pivoted counterclockwise around the fulcrum means 5B and displaced at the lower end backward, the upper mold 100 is simultaneously pressed against the support plate 1A by the sliding contact surface e4. The plane e5 is pressed by the straight bar member 18a of the upper mold pressing member 3a and the vertical pressing plane part c5a, and the supported part 100a is strongly clamped by the support plate 1A and the upper mold pressing member 3a. .
In this clamped state, the straight bar member 18a is pushed by the flat surface e5 of the upper mold 100 by the pressing force of the pressing force generating means 4, and enters the straight bar member supporting groove c7a against the elasticity of the elastic means 19. It becomes a state, and does not become an obstacle at the time of the vertical pressing flat part c5a being pressed against the flat surface e5.

Thereafter, the upper die 100 is engaged with the upper die 100 and the lower die by moving up and down the movable side of the upper and lower tables in the press brake, so that the upper die 100 has the vertical pressing flat surface portion 3a, the straight bar member 18a and the support plate portion It is raised relative to these in a state of being pressed against 1A.
Due to this rise, the contact surface e2 is in close contact with the lower end surface i1 of the support plate 1A, and the upper mold 100 is strongly and stably clamped at a specific position with respect to the holder body 1 as shown in FIG. It becomes a state.

  As described above, after the upper mold 100 is clamped by the upper mold holder device, in order to remove the upper mold 100 from the upper mold holder device, the operation lever 21a is moved to the unclamping position p4. Thereby, the space | interval of the front-back direction of 1 A of support plate parts and the upper mold | type pressing member 3a is increased, and the upper mold | type 100 falls out from between the support plate part 1A and the upper mold | type pressing member 3a.

Next, the case where the upper mold | type 100 shown to B in FIG. 7 is mounted | worn is demonstrated.
As shown in FIG. 5, the operation lever 21 a is swung to an arbitrary position within the intermediate operation range H. In this state, the elastic force of the elastic means 15A and the elastic force of the spring 10 of the fulcrum means 5A act on the upper mold holding member 3a, and the amount of protrusion of the cam member 21 toward the holder body 1 becomes an intermediate specific size. The supporting plate portion 1A and the lower end portion of the upper mold pressing member 3a are in a state of being opened slightly larger than the thickness in the front-rear direction of the supported portion 100a. More specifically, the front-rear direction interval between the front surface a1 of the support plate portion 1A and the vertical pressing flat surface portion c5a of the upper mold pressing member 3a is slightly larger than the front-rear direction thickness of the supported portion 100a.

  Under this state, the supported portion 100a of the upper die 100 is inserted between the support plate portion 1A and the upper die pressing member 3a from the left-right direction f2, and the upper portion 100a is inserted into the locking groove e3 formed in the upper die 100. The straight bar member 18a of the mold pressing member 3a is positioned. At this time, the supported portion 100a does not come into strong contact with the upper mold pressing member 3a, the support plate portion 1A, or the straight bar member 18a, and the supported portion 100a is formed between the support plate portion 1A and the upper mold pressing member 3a. Inserted smoothly. Further, in this inserted state, the upper mold 100 is prevented from falling between the support plate portion 1A and the upper mold pressing member 3a by the engagement between the straight bar member 18a and the locking groove e3.

  Next, the operation lever 21a is set to the clamp position p1 in the horizontal orientation. As a result, the supported portion 100a is strongly clamped by the front surface a1 of the support plate portion 1A and the vertical pressing flat surface portion c5a of the upper mold pressing member 3a by the action described above. At this time, the rear surface of the straight bar member 18a of the upper mold pressing member 3a does not contact the bottom surface of the locking groove e3 or is in contact with a relatively small pressure due to the elasticity of the elastic means 19.

Thereafter, the upper die 100 is moved up and down on the movable side of the upper and lower tables in the press brake to engage the upper die 100 and the lower die, so that the upper die 100 has the vertical pressing flat portion c5a and the straight bar of the upper die holding member 3a. The member 18a and the support plate 1A are raised relative to these while being in pressure contact with each other.
Due to this rise, the contact surface e2 eventually comes into close contact with the lower end surface i1 of the support plate 1A, and the upper mold 100 is strongly and stably clamped at a specific position with respect to the holder body 1 as shown in FIG. It becomes the state.

  As described above, after the upper mold 100 is mounted on the upper mold holder device, the upper mold 100 is removed from the upper mold holder device by moving the operation lever 21a to an arbitrary position within the intermediate operation range H. In this state, the distance in the front-rear direction between the front surface a1 of the support plate portion 1A and the vertical pressing flat surface portion c5a of the upper pressing member 3a is slightly larger than the thickness in the front-rear direction of the supported portion 100a. Is in a state in which it cannot be completely removed from the locking groove e3.

As a result, the upper mold 100 is released from the tightened state, and thus tends to descend due to its own weight. However, since the upper surface of the locking groove e3 is locked to the straight bar member 18a, the upper mold 100 is supported by the support plate 1A. And the upper mold pressing member 3a do not fall.
Thereafter, the upper mold 100 is moved in the left-right direction f2, and thereby the upper mold 100 is removed from the upper mold holder device.

  Next, when the upper mold 100 shown in FIG. 7C is mounted, the operation lever 21a is swung to an arbitrary position within the intermediate operation range H as shown in FIG. Accordingly, as described above, the support plate 1A and the lower end of the upper mold pressing member 3a are opened, and the front-rear direction between the front surface a1 of the support plate 1A and the vertical pressing flat section c5a of the upper mold pressing member 3a. The distance is slightly larger than the thickness in the front-rear direction of the supported portion 100a.

  Under this condition, the supported portion 100a of the upper mold 100 is inserted from the left and right direction f2 between the support plate 1A and the upper mold pressing member 3a, and the upper mold 100 is inserted into the locking groove e3 formed in the upper mold 100. The straight bar member 18a of the mold pressing member 3a is positioned. At this time, the supported portion 100a does not come into strong contact with the upper mold pressing member 3a, the support plate portion 1A, or the straight bar member 18a, and the supported portion 100a is formed between the support plate portion 1A and the upper mold pressing member 3a. Inserted smoothly. Further, in this inserted state, the upper mold 100 is prevented from falling between the support plate portion 1A and the upper mold pressing member 3a by the engagement between the straight bar member 18a and the locking groove e3.

  Next, the operation lever 21a is operated to the clamp position p1 as shown in FIG. As a result, the supported portion 100a is pressed against the sliding contact surface e3 by the front surface a1 of the supporting plate portion 1A by the above-described action, and at the same time, the plane e7 is pressed by the vertical pressing flat surface portion c5a of the upper mold pressing member 3a. It will be in the state clamped to. At this time, the rear surface of the straight bar member 18a of the upper mold pressing member 3a does not contact the bottom surface of the locking groove e3 or is in contact with a relatively small pressure due to the elasticity of the elastic means 19.

Thereafter, the upper die 100 is moved up and down on the movable side of the upper and lower tables in the press brake to engage the upper die 100 and the lower die, so that the upper die 100 has the vertical pressing flat portion c5a and the straight bar of the upper die holding member 3a. In a state of being pressed against the material 18a and the support plate portion 1A, it is relatively raised.
As a result of this rise, the contact surface e2 eventually comes into close contact with the lower end surface i1 of the support plate 1A, and the upper mold 100 is strongly and stably clamped at a specific position with respect to the holder body 1 as shown in FIG. It becomes the state.
At this time, the inclined surface portion e8 does not perform the original function obtained conventionally when clamping the supported portion 100a. This is because the upper die 100 is clamped by the upper die holder device according to the present invention. It will not cause any trouble in doing so.

  As described above, after the upper mold 100 is mounted on the upper mold holder device, the upper mold 100 is removed from the upper mold holder device by moving the operation lever 21a to an arbitrary position within the intermediate operation range H. In this state, the distance in the front-rear direction between the front surface a1 of the support plate portion 1A and the vertical pressing flat surface portion c5a of the upper pressing member 3a is slightly larger than the thickness in the front-rear direction of the supported portion 100a. Is in a state in which it cannot be completely removed from the locking groove e3.

In this state, since the upper mold 100 is released from the tightened state, the upper mold 100 tends to descend due to its own weight. However, since the upper surface of the locking groove 2e is locked to the straight bar member 18a, the upper mold 100 is supported by the support plate portion. It does not fall from between 1A and the upper mold pressing member 3a.
Thereafter, the upper mold 100 is moved in the left-right direction f2, and thereby the upper mold 100 is removed from the upper mold holder device.

  In the above description, the case where the upper mold 100 is mounted between the support plate portion 1A and the front upper mold pressing member 3a has been described, but instead the support plate section 1A and the rear upper mold pressing member 3b. It can also be installed between. In this case, the upper mold pressing member 3a on the front side is brought into a state of being held in the same shape on the support plate 1A by using an appropriate locking tool. When the operating lever 21a is swung in this state, the pressing force generating means 4 compresses and deforms the elastic member 4a by the cam member 21, and is the same as in the case of the front upper mold pressing member 3a with respect to the rear upper mold pressing member 3b. It will act on. Therefore, the upper mold holder device operates substantially the same as described above even when the upper mold 100 is mounted between the support plate portion 1A and the rear upper mold pressing member 3b.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is possible to arbitrarily change each part to another configuration that functions in substantially the same manner as this, and such a thing is also included in the present invention. Within the scope of the invention.

It is a front view of the upper mold holder device concerning the present invention. It is sectional drawing which shows the x1-x1 part of FIG. It is a figure which shows the x2-x2 part of FIG. It is a figure which shows the state which operated the operation lever of the said upper mold | type holder apparatus to the clamp position. It is a figure which shows the state which operated the said operation lever within the intermediate operation range. A cam member and an operation lever are shown, A is a plan view and B is a front view. The upper die attached to the upper die holder device is shown with A showing that the supported portion has no locking groove, and B has the locking groove on the supported portion but not the inclined surface. C is a figure which shows what has a locking groove and an inclined surface in a to-be-supported part. It is a figure which shows the state which mounted | wore the said upper mold | type holder apparatus with the upper mold | type shown to B in FIG. It is a figure which shows the state which mounted | wore the upper mold | type shown to C in FIG. 7 with the said upper mold | type holder apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Holder main body 1A Support plate part 3a Upper mold | type pressing member 4 Pressing force generation means 18a Straight bar member 19 Elasticity means 21 Cam member 21a Operation lever 22 Shaft member 100 Upper mold | type 100a Supported part a1 Vertically directed pressed surface c2 Support plate Part-side vertical surface c5a Vertical pressing flat surface part c7a Straight bar member support groove e2 Locking groove f2 Left-right direction

Claims (3)

  A support plate formed at a lower portion of a holder main body to be attached to the upper table, and an upper mold pressing member that presses the supported portion of the upper mold against the support plate and sandwiches the upper mold with the support plate. In the press brake upper mold holder apparatus, a vertical pressing flat surface portion that is in surface contact with a vertical pressed surface portion of the supported portion of the upper mold is provided at the lowermost portion of the upper mold vertical vertical surface of the upper mold pressing member. In addition, a straight bar member support groove is formed at a position in the left-right direction in the middle of the vertical length of the vertical pressing flat surface part, and the upper bar supported portion is engaged in the straight bar member support groove. A straight bar member having a specific cross-sectional shape corresponding to the cross-sectional shape of the stop groove is urged by an elastic means to be displaceable within a predetermined range in the front-rear direction perpendicular to the vertical pressing flat surface portion and to the supported portion side. Press brake upper die Da apparatus.   A cam member is rotatably mounted on the upper mold holding member via a shaft member, and an operation lever is provided for rotating the cam member. On the other hand, a displacement related to the rotation of the cam member is input. There is provided a pressing force generating means for applying a specific direction pressing force of the magnitude related to the lever displacement to the cam member, and when the operation lever is operated around the shaft member, it corresponds to the operation amount. 2. The upper part for a press brake according to claim 1, wherein the upper mold pressing member is displaced in the front-rear direction to press the supported part toward the supporting plate part with a pressing force corresponding to the operation amount. Mold holder device.   When the operation lever is directed in the left-right direction around the shaft member that is in a vertical orientation, the upper mold pressing member presses the supported portion against the supporting plate portion with a specific amount of pressing force, Further, when the free end portion of the operation lever directed in the left-right direction is swung around the shaft member to the side away from the supported portion, the upper mold pressing member is interlocked to the side away from the supported portion. The upper mold holder device for a press brake according to claim 2.

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