KR19980042597A - Press Brake Mounting Device - Google Patents

Abstract

Provided is a press brake mounting apparatus for press brakes, in which the overall configuration is simplified, and in addition, the punch replacement operation can be performed reliably and safely.

The upper part of the upper die 4 is provided with an engaging groove 5 at least on the rear side according to the mounting base portion 4 ', and the rear fixing plate 6 is engaged with the locking groove 5 of the upper die 4 described above. The projection 7 is provided on the side of the narrow surface, and the movable plate 10 on the front side of the upper part mounting portion of the ram 2 can swing upward and downward in contact with the above-described ram 2 at an intermediate position in the vertical direction. The stem 11 is provided, the elastic body 14 is sandwiched between the bolts 17, and the movable plate 10 is tilted by the attached operating lever 21. The upper die 4 is fixed in shape by engaging the projection 7 of the fixing plate 6 with the locking groove 5 described above.

Description

Press Brake Mounting Device

The present invention relates to a mold mounting apparatus for a press brake which enables the upper die in the press brake to be replaced simply and safely.

Conventionally, an upper die (punch) clamp device in a press brake which is generally used to bend and process a plate, sandwiches a punch between a fixed plate on the rear side and a movable plate on the front side of the ram, and then moves the movable plate to bolts. The punch is clamped by tightening. Therefore, when replacing a punch, many bolts must be fastened or loosened by a tool, and the work which was very cumbersome and airborne was required. In addition, ordinary punches were inserted as described above, and if the bolts were inadvertently loosened, the punch would be dangerous to fall.

In such a case, for example, a clamp of a punch under the supply of a fluid pressure, a hydrostatic operation type for unclamping, or a lever-type clamp that increases the clamping force by raising the punch by installing a bevel on the clamp surface of the mold. Devices are also known. In addition, as described in, for example, Japanese Patent Application Laid-Open No. 7-90283 or 8-57542, there is a press-fitting piece of a punch equipped with a groove and a pushable protrusion deep into the groove to prevent the punch from falling. It is known to do.

However, in the form of clamping and unclamping under the above-mentioned fluid pressure supply, a device for supplying a fluid or a controller thereof is required, and an accumulator is required for the clamping device itself. It becomes expensive.

Further, in order to increase the clamping force, it is difficult to apply the inclined surface to the mold, and it is necessary to provide an engaging member that is made to coincide with the inclined surface, and there is a problem in the work surface.

Furthermore, in the clamp device known from Japanese Patent Application Laid-Open No. 7-90283 or Japanese Patent Application Laid-open No. Hei 8-57542, a locking portion is provided for preventing the fall between the ideal type and the upper mold holder during the detachable operation. Since the locking means is provided in the pressing holding portion on the front side, it is difficult to handle the upper mold with the locking portion at the time of mounting. In addition, since the number of constituent members in the front increases the complexity of the structure, the manufacturing cost increases, and there is a problem in that it is structurally unreasonable to perform the operation of filling the upper mold with respect to the mounting portion from the front side.

An object of the present invention is to provide a press brake mounting apparatus of a press brake in which the overall configuration is simplified, and in addition, it is possible to reliably and safely perform a punch replacement operation.

In order to solve this problem, the upper mold to be handled can be temporarily entrusted by engaging a portion against the drop preventing protrusion at the rear side of the mounting portion, and the movable plate attached to the front portion is operated by lever operation. It is a mounting device for press brake dies that is simply pushed in to keep the upper die in the correct posture and to be securely inserted and mounted.

In the present invention, the attachment / detachment of the mold (upper mold) to the ram is based on the number of reaction forces for obtaining the clamp output in the movable operation unit of the movable plate by the operating lever to which the upper mold in the upper mold mounting unit outputs the clamp force. By changing the condition of the branch, the swing range of the movable plate supported to swing in the vertical direction is opened so that the upper mold can be easily detached from the front of the mounting portion and the workability can be improved.

In short, the upper mounting apparatus of the press brake according to the present invention.

In the upper brake mounting apparatus of the press brake which is fixed by inserting the upper mold by the front and rear both plates attached to the lower part of the ram,

The upper part of the upper mold is provided with at least a back latch according to the mounting base, and the rear fixing plate is provided with a projection portion engaging the upper recess with the locking groove toward the narrow surface side, and the movable plate on the front side of the ram is The above-mentioned fixing can be made in contact with the above-mentioned ram at an intermediate position in the up-down direction, and is fixed to the ram through an elastic body, and the lower part of the movable plate is pushed upward by an attached operating lever. It is characterized in that it is configured to narrow the upper mold by engaging the locking groove described above with the projection of the plate.

In the present invention, the movable plate is provided so that the swing point of the projection stems associated in the width direction is in contact with the ram, and the swing point is always attached to the ram by the elastic body in a plurality of places. It is preferable that an operation lever for swinging the movable plate is provided at a position opposite to the side held by the fixed plate or the like. In addition, it is preferable that the elastic member is mounted on the upper mold clamping side of the movable plate.

In addition, the operation lever is mounted by twisting the screw shaft on the upper portion of the movable plate, and the screw shaft tip protrudes to the ram side at the rotation control position by the stopper provided on the movable plate to the movable plate. It is preferable that the clamping force is released so as to generate an action force for clamping the upper die, and vice versa.

Furthermore, in the present invention, a movable slide member is provided at the collision portion between the screw shaft end of the operation lever and the ram, and the slide member is movable from the outside, so that the screw shaft end is normally provided by a stopper. When the ram is subjected to the clamping reaction through the slide member, and the slide member is deviated from the screw shaft tip position of the operating lever, the movable plate is moved relative to the swing point. The lower part of the movable plate can be opened largely, and the upper mold can be easily attached to or detached from the front part from the mounting position.

According to the apparatus of the present invention configured as described above, the upper and lower molds are temporarily supported on the ram side while the upper and lower molds are engaged with the protruding portions provided on the fixing plate. Then, the clamping force is output to the movable plate by the operation lever, whereby mounting can be fixed. In addition, the movable plate can be fixed by the action force of the operating lever and the retaining elastic body by blocking and removing the up-down swinging point provided in the intermediate portion with a ram.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional view of an embodiment of an upper die mounting apparatus of a press brake according to the present invention.

FIG. 2 is a left side view of FIG. 1. FIG.

3 is a cross-sectional view along the line A-A in FIG. 2;

4 is a cross-sectional view seen from B in FIG. 2.

Fig. 5 is a sectional view of the main portion showing an upper mold mounting state of an embodiment of an upper mold mounting apparatus of a press brake according to the present invention.

Fig. 6 is a sectional view of the main portion showing one state in a state in which the upper mold of the first embodiment of the upper mold mounting apparatus of the press brake according to the present invention is removed.

Fig. 7 is a sectional view of the main portion showing a state in which the upper mold of the first embodiment of the upper mold mounting apparatus of the press brake according to the present invention is detached from the front side.

-Explanation of symbols for the main parts of the drawings-

1: upper mounting device 2: ram

3: holder installation part 4: upper type

4 ': Mounting base of upper box 5: Locking groove

6: fixing plate 7: protrusion

10: movable plate 11: protrusion of the movable plate

12: stair hole 14: elastic body (coil spring)

15: Elastic strap 17: Mounting bolt for the movable plate

18: screw hole 20: clamp mechanism

21: operating lever 22: screw shaft for supporting the operating lever

23: stopper of operation lever 25: slide plate

26: stopper of slide plate

EMBODIMENT OF THE INVENTION Next, the specific embodiment of the upper mold | type mounting apparatus of the press brake which concerns on this invention is described, referring drawings.

1 is a longitudinal cross-sectional view of an embodiment of an upper die mounting apparatus of a press brake according to the present invention. FIG. 2 is a left side view of FIG. 1. 3 is a cross-sectional view along the line A-A in FIG. 4 is a cross-sectional view seen from B in FIG. 2.

In these drawings, the upper mold mounting apparatus 1 of this embodiment is provided along the lower part of the ram 2 of the press brake (not shown for the whole), and is formed in the lower end part of the ram 2. The holder mounting portion 3 is formed to have the same thickness as the mounting base portion 4 'of the upper die 4, and the fixing plate 6 is fixed to the rear side by bolts with respect to the holder mounting portion 3. On the front side, a movable plate 10 for clamping the upper die 4 and the clamping mechanism 20 for fixing operation are provided in cooperation with the fixing plate 6 described above. In addition, the upper die 4 used in the present embodiment has a locking groove 5 for preventing the fall in the longitudinal direction so that the mounting base portion 4 'is shown in FIG. I do not have a groove)

As shown in Fig. 1, the fixing plate 6 engages with the locking groove 5 of the upper die 4 toward the front side of the lower end thereof, and thus the projection stem 7 for preventing the drop when the upper die is mounted. Is dominated throughout the battlefield. The protruding stem 7 is formed of a resin in which a gap with a sufficient margin occurs with respect to the locking groove 5 of the upper die 4.

As shown in FIG. 1, the movable plate 10 is formed with a projection stem 11 extending over the entire length at an approximately center portion at a height in the vertical direction toward the back side, and the projection stem 11 is formed on the upper die 4. Elastic body 14, which is filled with a stair hole 12 provided at a plurality of locations on the center line (in this example, divided into left and right equally from the center at two locations) at an appropriate interval when clamping the clamp. Is inserted into the holder mounting portion 32 of the ram 2 by a bolt 17 so as to be swingable. Therefore, in the attachment part by the bolt 17 which sandwiched the said elastic body 14, the insertion hole of the bolt 17 is a dimension which does not prevent the up-and-down movement of the movable plate 10. FIG. In this embodiment, as the elastic body 14, a coil spring is used, and the protrusion 11 is brought into contact with the ram 2 by the coil spring.

Moreover, the groove | channel 13 is provided in the width direction (length direction) in the lower part of the back surface of the movable plate 10, and this groove 13 exposes a part of elastic strings (elastic string 15), such as a urethane resin, from the back surface. The state has been reduced. In addition, this elastic string 15 is fixed so that the plate shape may not be detached by the male screw 16 at the required interval (refer FIG. 1).

As the clamp mechanism 20 for allowing the movable plate 10 to be mounted and fixed to the upper die 4, the movable plate 10 is attached to the center of the upper side on the projection stem 11 serving as the swing start point of the movable plate 10. And a screw shaft 22 for supporting the operating lever 21. The screw shaft 22 is a screw hole 18 provided in the movable plate 10, and the shaft is They are screwed together so that the tip protrudes to the back side. The operation lever 21 is in a state in which rotation is restricted by the stopper 23 provided on the movable plate 10 as shown in FIG. When rotated counterclockwise on the drawing, the screw shaft 22 is pulled in, and the pushing force to the ram 2 side is eliminated, and the clamping of the upper mold | type 4 is loosened.

As a part of such a clamp mechanism 20, the slide which makes the swing range of the movable plate 10 expandable in the side part of the position of the screw hole 18 where the screw shaft 22 of the operation lever 21 joins. The plate 25 and the stopper 26 which regulates the movement are attached to a part of the movable plate 10.

The slide plate 25 is a long hole 19 'which is slidably filled in a recess 19 at a horizontal length formed on the rear surface of the movable plate 10 and is opened along the recess 19. ) Is movable by a bolt 27 inserted through the spacer.

Then, the stopper 26 is rotated back and forth at one end of the long hole 19 'so that the slide plate 25 is always held in contact with the tip of the screw shaft 22 of the operation lever 21 described above. It is supported by the pin 29 so that it may be installed. In addition, the stopper 26 described above allows the rear half portion to emerge from the base portion supported by the pin toward the surface side of the movable plate 10, and the spring 28 is brought into contact with the inner side of the rear half portion so that the tip end portion of the stopper 26 is always present. The locking layer 26 'provided in contact with the tip of the slide plate 25 fulfills the role of the stopper. The spring 28 is supported by a support plate attached to the rear side of the movable plate 10.

As described above, the upper mold mounting apparatus 1 of the present embodiment configured as described above has a long mold 4 provided with a locking groove 5 for preventing a drop in the mounting base portion 7 ', as shown in FIGS. 2 and 5. The mounting base portion 4 'is clamped from the front and rear by the fixed plate 6, the movable plate 10, etc. with respect to the ram 2, and is used. In this mounting state, the mounting base portion 4 'of the upper die 4 receives the rear face to the fixed plate 6, and the elastic strap 15 is provided on the lower end portion and the lower inner surface of the movable plate 10 on the front face. ) Is pushed firmly so that clamping force is applied and fixed.

When the pressing force against the mounting base portion 4 'of the upper die 4 by the movable plate 10 is rotated clockwise and moved to the limit position by the stopper 23, the movable lever 21 is operated. When it moves to the limit position by the stopper 23 screwed with the screw hole 18 of the plate 10, the screw shaft 22 screwed with the screw hole 18 of the movable plate 10 will become ram 2 Protrude toward the side, and the slide plate 25 is strongly pushed into contact with the front surface of the holder mounting portion 3 at the lower end of the ram 2. Then, the movable plate 10 is lifted away from the contact with the front face of the holder mounting part 3 of the lower end via the screw hole 18 screwed together by the advancement of the screw shaft 22, and it floats slightly. . As a result, the movable plate 10 resists the thrust of the coil spring 14 acting on the bolt 17 supporting the portion of the projection stem 11, and the reaction force is lower than the swing point. It acts hard on the edge part of the movable plate 10, and presses the mounting base part 4 'of the upper mold | type 4 strongly. In addition, since the elastic strap 15 is attached to the lower inner side of the movable plate 10, the contact friction force by the elastic strap 15 is added, thereby further increasing the fixing effect.

Next, to remove the upper die 4 from the mounting portion, when the operating lever 21 is rotated counterclockwise in FIG. 2, the screw shaft 22 is rotated in the opposite direction as when the ram 2 is mounted. The pressing force by the slide plate 25 pushed to the front face of the holder mounting part 3 of the () is removed, and the movable plate 10 is freed. Then, the clamping pressure with respect to the upper die 4 acting on the lower portion of the movable plate 10 is released, and the mounting base portion 4 'of the upper die 4 is moved. However, since the locking groove 5 and the projection 7 on the side of the fixing plate 6 are in an engaged state, the locking force 5 is maintained without falling even when the above-mentioned fixing force is released.

Therefore, it is easy to extract the upper die 4 by moving it horizontally.

In addition, when the upper die 4 is inserted into the upper die mounting portion by the fixing plate 6 and the gadol plate 10 or the like from the horizontal direction, the locking groove 5 is fixed to the locking plate 5 in a state where the fixing force is eliminated as described above. It is carried out by inserting it coincident with the projection 7 of (6).

In addition, in this embodiment, since the mechanism which moves the slide plate 25 to the side of the attachment part of the operation lever 21 is provided as mentioned above, the latter half part of the stopper 26 which appeared on the surface of the movable plate 10 was provided. When the finger is pushed, the stopper 26 which displaces the stopper 26 in the front-rear direction against the holding force by the spring 27 and stops the movement of the slide plate 25 is the first step stratification 26 '. Since is peeled off, the slide plate 25 is moved to the upper left direction as the head of the supported bolt 28. In this way, the abutment between the screw shaft 22 supporting the operation lever 21 and the slide plate 25 is released, so that the movable plate 10 can be largely swinged by the operation lever 21. As a result, the opening to the mounting portion of the upper mold mounting base portion 4 'by the movable plate 10 and the fixed plate 6 can be increased. Therefore, as shown in Fig. 7, the upper die 4 can be detached from the front side.

In this embodiment, the upper die 4 is placed in the upper die mounting space of the lower end of the ram 2 even when the lower die of the movable plate 10 is largely displaced and the upper die 4 is mounted or dismounted. When inserting, the gripping operation 5 by the movable plate 10 can be carried out by inserting the locking groove 5 on the rear surface of the upper die 4 so as to engage the lower end of the fixing plate 6 and the projection 7. Until it is already entrusted temporarily by engagement of the locking groove 5 and the projection 7, it can be supported without fear of falling, and the safety of work can be secured first.

In addition, if the locking groove in the mounting base portion 4 'of the upper die 4 is provided in both front and rear, the ideal die 4 can be reversed back and forth and safely mounted and used as described above.

The slide plate in this embodiment mentioned above corresponds to the slide member of this invention.

As described above, according to the present invention, the configuration of the entire apparatus can be simplified, and when the upper mold is detached from the mounting portion of the ram lower portion, the engaging grooves formed on the back side of the upper mold mounting basic portion are engaged with the protrusions provided on the fixing plate side. Since the upper mold can be prevented from falling in the most natural posture in handling, the mounting operation inserted from the side of the upper mold to the ram, as well as the detachable operation from the front side, can be safely performed. do. In addition, the clamp mechanism has a function of increasing the amount of displacement in the vertical direction of the movable plate, and the opening of the insert portion can be made easier by the opening of the upper mold when the upper mold is attached or detached from the front side. This further improves.

Claims (5)

In the upper brake mounting apparatus of the press brake to be fixed by inserting the upper mold by the front and rear both plates attached to the ram bottom, In the upper part of the upper mold, an engaging groove is installed at least on the rear side according to the mounting base, and in the rear fixed plate, a protrusion for engaging the upper groove with the engaging groove is installed to the side of the narrow surface, and the movable plate on the front side of the ram is The fixed plate described above is capable of swinging in contact with the above-mentioned ram at an intermediate position in the up-down direction, mounted on the ram via an elastic body, and pushing the lower portion of the movable plate upward by an attached operating lever. The upper brake mounting apparatus of the press brake, characterized in that the upper mold is narrowed and fixed by engaging the locking groove in the projection. According to claim 1, wherein the movable plate is provided so that the protruding stem swing point connected in the width direction is in contact with the ram, and is mounted so as to contact the ram and the swing point always by the elastic body in a plurality of places, An upper lever mounting device for press brakes, characterized in that an operation lever for swinging the movable plate is provided at a position opposite to the side held by a fixed plate or the like. The upper mold mounting device of a press brake according to claim 1 or 2, wherein an elastic member is mounted on the upper mold pressure fixing side of the movable plate. The said operating lever is mounted by twisting a screw shaft in the upper part of the said movable plate, The said screw shaft tip is moved to the ram side in the rotation control position by the stopper provided in the said movable plate. A press brake mounting apparatus according to claim 1, wherein an actuating force for maximum clamping of the upper die is issued to the movable plate, and the clamping force is released when the rotating force is reversed. 3. The slide lever according to claim 1 or 2, wherein said operating lever is provided with a movable slide member at the end of the screw shaft tip and the ram, and the slide member is movable from the outside. A screw shaft end receives the clamping reaction force through the slide member, and the slide member is slid away from the screw shaft tip position of the operating lever, and the movable plate is moved relative to the swing point. And the upper brake mounting apparatus of the press brake, characterized in that the lower part of the movable plate can be opened large.