JP5662183B2 - Upper holder for press brake - Google Patents

Description

  The present invention relates to an upper mold holder that supports an upper mold used for a press brake in a detachable and replaceable manner. More specifically, the present invention has a fixing groove in the left-right direction on the upper side of both front and rear surfaces. The present invention relates to an upper mold holder for a press brake intended for an upper mold having a fall prevention member which can be projected and retracted with respect to a front surface or a rear surface near the both ends in the left-right direction or near the center in the left-right direction.

  When a plate-like workpiece is bent by a press brake, it is preliminarily replaced with upper molds having various shapes and dimensions in accordance with the shape and size of the product to be bent. As described above, when replacing the upper mold, the upper mold may fall, so various safety measures are taken for the upper mold and the upper mold holder device for mounting the upper mold (for example, Patent Document 1).

JP-A-4-294822

  The upper die for a press brake described in Patent Document 1 includes a fixing groove in the left-right direction on the upper side of both front and rear surfaces, and below the fixing groove, near both ends in the left-right direction or in the left-right direction. In the vicinity of the central portion, a fall prevention member such as a pin that can be moved in and out with respect to the front surface or the rear surface is provided.

  The upper mold holder device, in which the upper mold can be attached and detached, has a configuration in which an upper mold mounting groove in the left-right direction is provided on the lower surface of the holder main body provided with an attachment portion for the upper table in the press brake. On both the front and rear surfaces of the upper mold mounting groove, there are long locking grooves in the left-right direction that can lock the fall prevention member provided in the upper mold. Further, a configuration in which an upper mold fixing member having an engagement convex portion that can be engaged and disengaged with a fixing groove in an upper mold mounted on the upper mold mounting groove on the front surface or the rear surface of the holder main body is provided to be movable back and forth. It is.

  In the configuration described in the above-mentioned patent document, the holder body is configured to be long in the left-right direction substantially equal to the width dimension in the left-right direction of the upper table in the press brake, and the fall prevention member provided in the upper mold is formed in the locking groove. In an engaged state. Therefore, even when the upper mold is fixed by the upper mold fixing member, safety is maintained without dropping from the upper mold mounting groove of the holder body. The upper die is attached to and detached from the holder body by moving the upper die in the left-right direction along the upper die mounting groove. If the upper mold is a split mold and the width dimension in the left-right direction is relatively small, the action member provided on the left and right ends or near the center of the upper mold is operated to The upper die can be removed downward with respect to the holder main body by immersing from the front or rear surface of the upper die and releasing the engagement between the locking groove of the holder main body and the fall prevention member.

  By the way, when the plate-shaped workpiece is provided with rising portions having large rising dimensions on both sides or one side in the left-right direction, when the workpiece is bent, the rising portion is connected to the holder main body in the upper holder device. In some cases, the bending process is impossible due to interference. Therefore, when the upper mold holder device is divided into upper mold holder devices having a small width in the left-right direction and a plurality of upper mold holder devices are mounted on the upper table in the press brake, the upper mold holder devices are separated at appropriate intervals. However, it is also conceivable that the rising portion of the workpiece enters the interval of the upper holder device.

  The upper mold that is relatively long in the left-right direction is configured to include an action member and a fall prevention member that is moved back and forth by the action member in the vicinity of both ends of the upper mold in the left-right direction so that the action member can be operated with both hands. . Therefore, as described above, in the case of a configuration in which a plurality of upper mold holder devices are provided at appropriate intervals in the left-right direction, when the upper mold is moved in the left-right direction, the fall prevention member is spaced between the upper mold holder devices. When positioned inside, there is a problem that the upper mold falls or that one of the fall prevention members is inclined while being supported by the upper mold holder device.

  That is, in a configuration in which a plurality of upper mold holder devices are arranged at appropriate intervals in the left-right direction, if the upper mold is inadvertently moved in the left-right direction, the fall prevention member falls off the upper mold holder device or tilts. There is something.

The present invention has been made in view of the above-described problems, and includes a fixing groove in the left-right direction on the upper side of both front and rear surfaces. The lower side of the fixing groove, near both ends in the left-right direction or in the left-right direction. An upper die holder for a press brake capable of fixing and holding an upper die having a fall-preventing member that can be projected and retracted with respect to the front surface or the rear surface in the vicinity of the center portion, and an attachment portion for the upper table in the press brake is provided on the upper portion. The lower surface of the holder main body is provided with an upper mold mounting groove in the left-right direction, and on both the front and rear surfaces of the upper mold mounting groove are provided with locking grooves in the left-right direction capable of locking the fall prevention member provided in the upper mold, An upper mold fixing member provided with an engaging projection that is detachable in one of the fixing grooves in the upper mold mounted in the upper mold mounting groove is provided on the front surface or the rear surface of the holder body so as to be movable back and forth. In the upper mold mounted in the upper mold mounting groove The other of the fixing grooves is provided with a locking projection that can be engaged and disengaged, and a stopper that protrudes into the locking groove and can come into contact with the fall prevention member when the upper mold moves in the left-right direction. The upper die restricting member is provided in the vicinity of the left and right sides of the rear surface or front surface of the holder body so as to be rotatable in the vertical direction.

  Further, in the upper mold holder for press brake, when the latching protrusion is engaged with the other fixing groove of the upper mold, the holder is brought into contact with the holder main body and below the latching protrusion. The upper die regulating member is provided with a contact portion that regulates rotation in the direction.

  In the upper mold holder for press brakes, the upper mold regulating member is provided on each of the left and right sides of the holder body, and the upper mold regulating members are connected to each other. .

  In the upper mold holder for the press brake, the engagement convex part of the upper mold fixing member is divided into a plurality of parts in the left-right direction, and the engagement convex part is provided on the front wall part or the rear wall part of the holder body. The through-holes in the front-rear direction through which the part can be inserted are provided at appropriate intervals in the left-right direction, and the through-holes on the left and right sides of the through-holes in the front-rear direction are opened in the left-right direction.

  According to the present invention, when the upper mold supported by the upper mold holder is moved in the left-right direction, the stopper member in the upper mold restricting member protrudes into the locking groove provided in the holder body in the upper mold holder, and the upper mold holder The movement of the fall prevention member provided in the mold in the left-right direction is restricted. Therefore, it is possible to prevent the upper mold from being inadvertently moved in the left-right direction with respect to the upper mold holder and falling or tilting the upper mold.

It is inclination explanatory drawing of the upper mold | type holder which concerns on embodiment of this invention. It is inclination explanatory drawing of the upper mold | type holder which concerns on embodiment of this invention. It is an operation explanatory view in the case of attaching and detaching the upper die to the upper die holder. It is explanatory drawing which shows the structure of the principal part of an upper mold | type.

  Referring to FIGS. 1 and 2, an upper die holder 1 for a press brake according to an embodiment of the present invention includes a holder main body 5 having an attachment portion 3 for an upper table in the press brake (not shown). On the lower surface of the holder body 5, an upper mold mounting groove 7 for mounting an upper mold for press brake (not shown in FIGS. 1 and 2) is provided in the left-right direction (X-axis direction).

  The upper die 101 targeted by the upper die holder 1 has front and rear fixing grooves 101G in the left and right direction (direction perpendicular to the paper surface in FIG. 4) on the upper side of both front and rear surfaces (both left and right side surfaces in FIG. 4). Prepare for symmetry. A fall prevention member 103 that can be moved in and out of the front or rear surface is provided below the fixing groove 101G. An operation member 105 such as a pin for operating the drop prevention member 103 is provided below the drop prevention member 103 so as to be movable back and forth. The fall prevention member 103 and the operation member 105 are integrated in, for example, a “U” shape, and are always biased in a protruding direction by a biasing member such as a coil spring built in the upper mold 101.

  Therefore, in the upper mold 101, when the operation member 105 is pushed in against the urging force of the urging means, the fall preventing member 103 is immersed in the front surface or the rear surface of the upper mold 101. When the pushing of the operation member 105 is released, the fall prevention member 103 is operated to project by the urging force of the urging means. The fall prevention member 103 and the operation member 105 are provided near both ends of the upper mold 101 in the left-right direction so that the upper mold 101 can be operated with both hands when the width dimension of the upper mold 101 in the left-right direction is relatively large. . And when the width dimension of the left-right direction is small, it is provided near the center part of the left-right direction.

  An attachment plate 9 for attaching the holder body 5 to the upper table in the press brake is integrally attached to the upper front portion of the holder body 5 by a fixture 11 such as a lock pin or an attachment bolt. On the upper surface of the holder body 5, a wedge member 13 that comes into contact with the lower surface of the upper table is provided so as to be movable in the front-rear direction (Y-axis direction). The upper wedge member 13 is configured to be pressed rearward by a push bolt 15 provided on the mounting plate 9 and pulled forward by a pull bolt 17. The upper wedge member 13 is positioned in the front-rear direction by the push bolt 15 and the pull bolt 17. Is to be adjusted.

  The upper mold mounting groove 7 is configured to open in both the left and right directions and the lower direction of the holder body 5. In other words, since the upper mold mounting groove 7 is formed, the front wall 19 and the rear wall 21 are provided on the lower surface of the holder body 5. And the locking groove which can lock the said fall prevention member 103 with which the said upper mold | type 101 was equipped in the lower part vicinity of the front-and-rear both surfaces (front wall part 19 and the inner surface of the rear wall part 21) of the said upper mold | type mounting groove 7 23A and 23B are formed in the left-right direction.

  As shown in FIG. 2, the rear wall 21 is provided with through-holes 25 in the front-rear direction at appropriate intervals in the left-right direction. Of the through holes 25, the left and right through holes 25A are open in the left-right direction. An upper mold fixing member 29 is supported on the rear surface of the holder body 5 so as to be movable in the front-rear direction, that is, swingable back and forth via left and right support members 27 having a hemispherical head. Yes.

  As is clear from FIGS. 1 and 2, the upper mold fixing member 29 includes a bent portion 31 having a lower end bent in the direction of the upper mold mounting groove 7. The bent portion 31 is provided with an engaging convex portion 33 that is detachably engageable with the fixing groove 101G in the upper die 101 attached to the upper die attaching groove 7 at the tip. In other words, the bent portion 31 has a plurality of engaging convex portions 33 that can be inserted through the through holes 25 of the rear wall portion 21 in the front-rear direction at appropriate intervals in the left-right direction. In other words, the bent portion 31 is divided into a plurality of portions in the left-right direction corresponding to the through holes 25.

  Then, the upper mold fixing member 29 is moved back and forth, and the fixing groove 101G of the upper mold 101 mounted in the upper mold mounting groove 7 is pressed by the engaging convex portion 33 so that the upper mold 101 is mounted. In order to fix to the groove 7, the holder body 5 is provided with a fixing means 35. The fixing means 35 is composed of an actuator such as a fluid pressure cylinder, for example, and the tip of a reciprocating actuator (not shown) such as a piston rod is the upper part of the upper mold fixing member 29. It is in contact with the side. Between the holder main body 5 and the upper mold fixing member 29, an elastic member (not shown) such as a coil spring that urges the engagement convex portion 33 in a direction to be detached from the through hole 25 is provided. It is armed.

  In addition, as a structure which rocks | fluctuates the said upper mold | type fixing member 29 back and forth, it is good also as a structure which interlockedly connected the front-end | tip part of the said reciprocating element and the upper mold | type fixing member 29. FIG. The fixing means 35 is provided with a lever that can be rotated in the left-right direction as in the conventional general upper mold holder, and the upper mold fixing member 29 is moved back and forth by rotating the lever. It is also possible to adopt a configuration in which the upper mold 101 is pressed and fixed.

  In the holder main body 5, front and rear through holes 37 communicating with the locking grooves 23 </ b> A are provided in the vicinity of the left and right sides of the front wall portion 19, and a pivot 39 is provided in the through hole 37. The upper die restricting member 41 is supported so as to be swingable in the vertical direction. As shown in FIGS. 1 and 3, the upper mold restricting member 41 includes an operation lever 43 extending in the upper front direction of the front wall portion 19, and the upper lever restricting member 41 has left and right operation levers 43. The distal end portion is integrally connected via a connecting bar 45.

  The upper mold restricting member 41 includes a triangular locking protrusion 47 that is detachably engageable with the fixing groove 101G in the upper mold 101 mounted in the upper mold mounting groove 7 provided in the upper mold holder body 5. In addition, a stopper portion 49 that can protrude into the locking groove 23A is provided. As shown in FIG. 3, when the operation lever 43 is in contact with the front surface of the holder main body 5, the locking projection 47 protrudes into the upper mold mounting groove 7, and the upper mold mounting groove 7. It is in a state of engaging with the fixing groove 101G in the upper mold 101 attached to the. That is, in FIG. 3, the operation lever 43 is prevented from rotating clockwise, the upper mold 101 is released from the upper mold fixing member 29, and the upper mold 101 mounted in the upper mold mounting groove 7 is When there is a tendency to move downward due to its own weight away from the ceiling (upper surface) of the upper mold mounting groove 7, the upper mold 101 is lowered by the locking projection 47 in the state of being engaged with the fixing groove 101 </ b> G of the upper mold 101. It works to regulate.

  In FIG. 3, the operation lever 43 is rotated counterclockwise (downward) to move the upper die 101 slightly upward, and the locking projection 47 is moved to the upper die mounting groove. 7, the upper die 101 is locked in the locking groove 23A by the fall prevention member 103 provided in the upper die 101, and the stopper portion 49 is in the locking groove. It is the structure which protrudes in 23A. That is, the protrusion of the locking projection 47 with respect to the upper mold mounting groove 7 and the protrusion of the stopper 49 with respect to the locking groove 23A are alternately performed. The stopper portion 49 protrudes into the locking groove 23A, so that the fall prevention member 103 provided in the upper die 101 is moved when the upper die 101 is moved in the left-right direction (direction perpendicular to the paper surface in FIG. 3). The upper die 101 is in contact with the upper die 101 and regulates the movement of the upper die 101 in the left-right direction.

  In the configuration as described above, the upper mold fixing member 29 is rotated in the clockwise direction in FIG. 3 by the fixing means 35 in a state where a plurality of upper mold holders 1 are mounted on the upper table in the press brake at appropriate intervals in the left-right direction. By moving and firmly pressing the upper die 101, the upper surface of the upper die 101 is pulled up until it comes into contact with the upper surface of the upper die mounting groove 7, and the upper die 101 is fixed in a state where it is attached to the upper die mounting groove 7. To do.

  In this state, the upper mold 101 that is long in the left-right direction is supported by the plurality of upper mold holders 1, and in order to move the upper mold 101 in the left-right direction, the operating lever 43 in each upper mold holder 1 is moved upward. As shown in FIG. 3, it is rotated and brought into contact with the upper surface of the holder body 5. That is, the locking projection 47 in the upper mold regulating member 41 is held in a state of protruding into the upper mold mounting groove 7. When the upper mold 101 is released from the upper mold fixing member 29, the upper mold 101 moves away from the upper surface of the upper mold mounting groove 7 due to its own weight and is mounted on the upper mold mounting groove 7. The locking projection 47 is engaged with the fixing groove 101G, and the upper die 101 can be supported so as to be movable in the left-right direction.

  As described above, when the upper surface of the upper mold 101 is in contact with and fixed to the upper surface of the upper mold mounting groove 7, the operation lever 43 is rotated counterclockwise in FIG. The engaging projection 47 can be detached from the fixing groove 101G, and the stopper 49 can be projected into the locking groove 23A.

  When the width of the upper mold 101 in the left-right direction is relatively small, and the upper mold 101 is attached to and detached from the upper mold holder 1 in the vertical direction, the engagement convex portion 33 of the upper mold fixing member 29 is moved backward ( In FIG. 3, it moves to the right) and is kept immersed from the upper mold mounting groove 7. When the upper mold 101 is inserted into the upper mold mounting groove 7 from the lower side, the upper surface of the upper mold 101 comes into contact with the distal end side of the locking convex portion 47 of the upper mold regulating member 41 from the lower side and moves upward. The upper die restricting member 41 is rotated counterclockwise in FIG.

  As described above, when the upper mold 101 is inserted into the upper mold mounting groove 7 from the lower side and mounted, the inclined upper surface 103F of the fall prevention member 103 provided in the upper mold 101 abuts the front wall portion 19 and is attached. The upper mold 101 is immersed against the power. When the upper die 101 is further raised and the fall prevention member 103 reaches a position corresponding to the locking groove 23A, the fall prevention member 103 is projected and locked to the locking groove 23A. . Therefore, the upper mold 101 is prevented from falling. Thereafter, as described above, the upper die fixing member 29 is rotated clockwise to firmly press the upper die 101, and thereby the upper die 101 is pulled up until it comes into contact with the upper surface of the upper die mounting groove 7. Thus, the upper mold 101 is fixedly held in the upper mold mounting groove 7.

  When removing the upper mold 101 downward with respect to the upper mold holder 1, when the upper mold 101 is fixed in the upper mold mounting groove 7, the upper mold regulating member 41 in FIG. By rotating counterclockwise, the locking projection 47 is inserted into the upper mold mounting groove 7 and the stopper 49 protrudes into the locking groove 23A. As described above, in a state where the stopper portion 49 protrudes into the locking groove 23A, when the upper die 101 is moved in the left-right direction, the fall prevention member 103 provided in the upper die 101 comes into contact with the stopper portion 49. The movement of the upper mold 101 in the left-right direction is restricted.

  Therefore, the fall prevention member 103 is prevented from being detached from the locking groove 23A in the left-right direction by moving the upper mold 101 in the left-right direction. Therefore, the fall prevention member 103 can be prevented from falling at intervals between the upper mold holders 1, and the upper mold 101 can be prevented from being accidentally dropped. Then, the operation member 105 provided in the upper mold 101 is pressed to immerse the fall prevention member 103 into the upper mold 101, whereby the locking by the locking groove 23A is released, and the upper mold mounting groove 7 of the upper mold holder 1 is released. The upper die 101 can be removed downward from the inside.

  As can be understood from the above description, when the upper mold 101 is moved in the left-right direction with respect to the upper mold holder 1 to be attached and detached, the upper mold restriction is provided in the fixing groove 101G provided in the upper mold 101. Since the locking projection 47 of the member 41 is in an engaged state, the upper mold 101 does not fall.

  When the upper mold 101 is attached to and detached from the upper mold holder 1 from below, the fall prevention member 103 provided on the upper mold 101 abuts on the stopper portion 49 protruding into the locking groove 23A, and the left and right The movement in the direction is restricted, and the fall prevention member 103 does not separate from the locking groove 23A in the left-right direction, and the conventional problems as described above can be solved.

  Further, in the above-described configuration, since the left and right through holes 25A are opened in the left-right direction, the width dimension in the left-right direction of the holder body 5 and the width dimension in the left-right direction of the upper mold fixing member 29 are equally provided. In the configuration, a dead zone where the upper mold 101 cannot be fixed does not occur on both the left and right sides. Therefore, even when the divided upper mold having a small width dimension is positioned at both ends of the holder body 105, for example, the divided upper mold can be securely fixed and held.

DESCRIPTION OF SYMBOLS 1 Upper mold holder 3 Mounting part 5 Holder main body 7 Upper mold mounting groove 19 Front wall part 21 Rear wall part 23A, 23B Locking groove 25, 37 Through hole 29 Upper mold fixing member 33 Engaging convex part 35 Fixing means 39 Axis 41 Upper mold regulating member 43 Operation lever 47 Locking convex part 49 Stopper part

Claims (4)

A left and right fixing groove is provided on the upper side of both the front and rear sides, and the fall prevention that can move in and out with respect to the front or rear surface is near the both ends in the left and right direction or near the center in the left and right direction below the fixing groove. An upper die holder for a press brake capable of fixing and holding an upper die provided with a member, and provided with an upper die mounting groove in the left-right direction on the lower surface of a holder main body provided with an attachment portion for an upper table in the press brake, One of the fixing grooves in the upper mold mounted in the upper mold mounting groove is provided with a locking groove in the left-right direction on both the front and rear surfaces of the upper mold mounting groove. An upper mold fixing member having an engaging projection that can be freely engaged and disengaged is provided on the front or rear surface of the holder body so as to be movable back and forth, and the other of the fixing grooves in the upper mold mounted in the upper mold mounting groove. Has a locking projection that can be freely engaged and disengaged. Both the locking of the upper mold restricting member provided with the fall preventing member and capable of abutting stopper during movement of the protruding into the groove in the lateral direction of the upper die, the surface or the front of the right and left sides around after said holder body An upper holder for a press brake, characterized in that it can be pivoted in the vertical direction.   2. The press brake upper die holder according to claim 1, wherein when the locking projection is engaged with the other fixing groove of the upper die, the locking projection comes into contact with the holder main body. An upper holder for a press brake, wherein the upper die restricting member is provided with a contact portion for restricting the downward rotation of the portion.   The upper mold holder for press brakes according to claim 1 or 2, wherein the upper mold restricting member is provided on each of the left and right sides of the holder main body, and the upper mold restricting members are connected to each other. Upper mold holder for press brakes.   4. The press brake upper die holder according to claim 1, wherein the engaging convex portion of the upper die fixing member is divided into a plurality of portions in the left-right direction, and the front wall portion or the rear portion of the holder body is provided. A through-hole in the front-rear direction through which the engaging convex part can be inserted in the surface wall part is provided at an appropriate interval in the left-right direction, and the through-holes on the left and right sides of the front-rear direction through-hole are opened in the left-right direction. Upper mold holder for press brakes.

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