JP2519010B2 - Upper mold holder for press brake - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper die holder for holding an upper die in a press brake for bending a plate material.

[0002]

2. Description of the Related Art A structure in which an upper die is attached to a lower portion of an upper table in a press brake is disclosed in, for example, Japanese Patent Laid-Open No. 58-32.
As shown in No. 0, a large number of upper mold holders (intermediate plates) of a predetermined height are attached to the lower part of the upper table at appropriate intervals, and a long upper mold or a plurality of divided upper mold holders are divided by the plurality of upper mold holders. The structure which supports a mold is common.

[0003]

Conventionally, when a plate material is bent by a press brake to manufacture, for example, a box body, the opposite side of a plate-worked work for manufacturing the box body is bent. Then, the flange portion is raised to both sides, and then the other side between the flange portions is bent to manufacture the box body. As described above, when performing bending between both flange portions, the length of the upper die is used according to the dimension between the both flange portions, and the upper die is located between both flange portions.

At this time, there is no problem if the upper die holder (intermediate plate) for holding the vicinity of both ends of the upper die is located inside the both end portions of the upper die, but the upper die holder has both end portions of the upper die. In the case where the plate material is more protruded, when the plate material is gradually bent up into a V shape when the plate material is bent, the flange portion which has already been bent and is in the raised state is formed. It may abut and interfere with the upper die holder.

That is, conventionally, the method has been limited to bending of a box having a relatively low flange portion.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, the present invention provides a plurality of supports for supporting an upper die of a press brake on the lower portion of an upper intermediate plate mounted on the lower portion of an upper table of the press brake. The lower intermediate plates of the above can be installed and the positions of the gaps between the lower intermediate plates can be adjusted in the left-right direction so that the lower intermediate plates can be adjusted in the left-right direction with respect to the upper intermediate plate. It is provided in.

Further, according to the present invention, an appropriate number of downwardly opening grooves are provided in the lower portion of the upper intermediate plate.

[0008]

With the above construction, when the flange portion that has already been bent and raised on the plate material is in a position facing the upper die holder, the lower intermediate plate is adjusted in the left-right direction with respect to the upper intermediate plate. It is possible to avoid facing the flange portion. Therefore, it is possible to avoid the flange portion from coming into contact with the lower intermediate plate when the plate material is bent. That is,
In other words, the height of the flange portion can be made higher than in the conventional case.

Further, by forming a groove that opens downward in the lower part of the upper intermediate plate, it is possible to perform bending even if the flange portion is higher.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a plurality of intermediate plate devices (upper molds) are provided at the bottom of an upper table 1 in a press brake (the structure of the press brake is well known, so the overall structure is not shown). Holders 3 are mounted at appropriate intervals, and a long upper die 5 is supported by each intermediate plate device 3. The intermediate plate device 3 is well known (for example, JP-A-58-32).
No. 0), detailed description of the configuration of the intermediate plate device 3 is omitted.

Further, in the lower part of the upper table 1,
An intermediate plate device 7 for the ends is mounted. The intermediate plate device 7 for this end is mounted on the upper table 1 so as to correspond to both ends of the upper die 5, and the overall height dimension thereof is set to be substantially equal to that of the intermediate plate device 3. There is.

As shown in FIG. 2, the intermediate plate device 7 for the end portion is composed of a substantially Z-shaped upper intermediate plate 13 and a lower intermediate plate 15 so as to have an upper and lower double structure. More specifically, the upper intermediate plate 13 is fixed to the lower portion of the upper table 1 by a plurality of bolts 9 screwed to the upper table 1 and a lever member 11.

The lower intermediate plate 15 fixedly supports the end portion of the upper die 5 or the split die 5D by the bolt 17 and the lever member 19, and is divided into a plurality of pieces as shown in FIG. Each lower intermediate plate 15
The upper intermediate plate 13 is supported so as to be position-adjustable in the left-right direction so that the position of the gap therebetween can be adjusted in the left-right direction.

That is, in this embodiment, the left and right engaging grooves 15G are formed in the upper portion of each lower intermediate plate 15. Then, each lower intermediate plate 1 is provided below the upper intermediate plate 13.
In order to fix 5, the tightening lever member 23 attached to the upper intermediate plate 13 by an appropriate number of bolts 21 has the engaging groove 1
A locking member 25 having a wedge-shaped cross section that engages with and disengages from the 5G is attached so as to be retractable.

More specifically, the tightening lever member 23 is provided with a width substantially equal to the width of the upper intermediate plate 13 in the left-right direction, and the tightening lever member 23 is attached to the left and right portions at which the lower intermediate plate 15 is tightened. A directional groove 23G is provided. Then, the locking member 25 is engaged with the groove 23G so as to be retractable. A spring 27 for urging the locking member 25 in a direction projecting from the groove 23G is mounted between the locking member 25 and the plurality of holes formed in the tightening lever member 23. The locking member 25 is provided at a plurality of locations on the locking member 25.
A plurality of bolts 29 slidably provided on the tightening lever member 23 are screwed to limit the protrusion of the bolt.

FIG. 3 shows an embodiment in which the lower intermediate plate 15 is divided into three parts corresponding to the division of the upper die 5.

In the above construction, as shown in FIG. 1, when the side of the workpiece W1 having the flange portions F on both sides and having the width L1 between the flange portions F is bent, Since the intermediate plate device 3 is not located at a position corresponding to the flange portion F, both flange parts F are attached to the intermediate plate device 3.
There is no such thing as abutting interference with.

However, in the case of the work W2 having the width L2, since the flange portions F on both sides correspond to the intermediate plate device 7, both the flange portions F of the work W2 are intermediate when the work W2 is bent. The plate device 7 comes into contact with and interferes with the plate device 7.

Therefore, conventionally, the height H1 (see FIG. 2) at which both flange portions F do not contact and interfere with the intermediate plate device has been relatively low.

However, in this embodiment, the lower intermediate plate 15 is laterally adjusted with respect to the upper intermediate plate 13,
The lower intermediate plate 15 is avoided from the position corresponding to both flanges F of the work W2. In this way, by avoiding the lower intermediate plate 15 from the corresponding positions of both flange portions F of the work W2, it is possible to cope with the height H2 at which both flange portions F contact and interfere with the upper intermediate plate 13. That is, in the present embodiment, even if the height of both flange portions F is relatively high, it is acceptable.

Further, in the present embodiment, as described above, when the lower intermediate plate 15 is positionally adjusted in the left-right direction, the tightening lever member 23 is in a loosened state, but the tightening lever member 23 is provided. Since the locking member 25 is in the state of being engaged with the groove 15G of the lower intermediate plate 15, the lower intermediate plate 15 does not drop and the safety is further improved.

Further, according to the present embodiment, the upper die 5 has a width L1.
It is extremely easy to make the upper die correspond to the width L2 after performing the bending work corresponding to the above, and it is possible to quickly cope with the bending work having different widths.

Further, according to this embodiment, for example, the split mold 5 is used.
When bending a work having a relatively narrow width to accommodate D, the contact surface between the upper table 1 and the upper intermediate plate 13 of the press brake becomes extremely larger than the sectional area of the split mold 5. . Therefore, as compared with the case where the upper intermediate plate corresponding to the width of the split mold 5D is used, the upper table 1
Since the pressure receiving surface of is increased, it is also effective for protecting the mounting surface of the upper table 1.

4 and 5 are a front view and a side view showing the third embodiment. In the third embodiment, a groove 13G opened downward is formed in the lower part of the upper intermediate plate 13 corresponding to the left and right intervals of the plurality of lower intermediate plates 15 attached to the upper intermediate plate 13. is there.

In other words, a plurality of downward projecting portions 13P are provided on the lower side of the upper intermediate plate 13, so that the groove 13G is formed between the projecting portions 13P.

In the structure as described above, the tightening lever member 2 for attaching the lower intermediate plate 15 to the upper intermediate plate 13 is used.
As shown in FIG. 4, it is desirable to divide 3 into a plurality of parts corresponding to the width of the lower intermediate plate 15. However, it is not always necessary to divide the groove, and a groove corresponding to the groove 13G formed in the upper intermediate plate 13 may be formed in the lower portion of the tightening lever member 23.

When the width of the tightening lever member 23 is relatively narrow and the number of the bolts 21 is one, as shown in FIG. 5, one of the upper intermediate plate 13 and the tightening lever member 23 has a pin. It is desirable to provide 23P to prevent rotation.

In the third embodiment, the lower intermediate plate 1
5 is divided into a plurality of parts, and the plurality of lower intermediate plates 1 are provided.
Since a groove 13G is formed in the lower portion of the upper intermediate plate 13 corresponding to the interval of 5, when the flange portion of the workpiece is set in this groove 13G, the rising of the flange portion is higher. However, it can be dealt with.

Further, as shown in FIG. 5, since the lever members 19 are provided on both front and rear sides (on both left and right sides in FIG. 5), the front and rear of the upper mold 5 can be reversed and mounted on the lower intermediate plate 15. .

[0030]

As will be understood from the above description of the embodiments, the present invention is, in short, the upper intermediate plate (1) attached to the lower part of the upper table (1) in the press brake.
In the lower part of 3), a plurality of lower intermediate plates (15) for supporting the upper die of the press brake are installed and provided so that the position of the gap between the lower intermediate plates (15) can be adjusted in the left-right direction. The lower intermediate plates (15) are provided so that their positions can be adjusted in the left-right direction with respect to the upper intermediate plates (13).

Further, in the invention described in claim 1, the upper intermediate plate (15) is provided with a proper number of grooves (13G) opening downward in the lower part thereof.

As is apparent from the above structure, in the invention according to claim 1, the upper intermediate plate 13 mounted on the upper table 1 in the press brake and the plurality of lower intermediate plates mounted on the lower part of the upper intermediate plate 13 are provided. The lower intermediate plate 15 has a double structure in which the lower intermediate plate 15 and the lower intermediate plate 15 are arranged in the left-right direction so that the position of the gap between the lower intermediate plates 15 can be adjusted in the left-right direction. The position is adjustable.

Therefore, when the work is bent, the lower intermediate plate 15 is adjusted in the left-right direction to adjust the work even if there are various gap methods between the flanges provided on both sides of the work. It is possible to avoid interference between the flange and the lower intermediate plate 15 at the time of bending, and it is possible to easily cope with the case where the height of the flange is higher than in the conventional case.

In the invention according to claim 2, claim 1
In the invention according to above, since the lower intermediate plate 15 is provided with the groove 13G that is opened downward, when the flange provided on the work corresponds to the groove 13G, the flange of the work and the upper middle part are formed. The interference with the plate 13 can also be avoided, and even if the height of the flange is higher, it can be dealt with.

[Brief description of drawings]

FIG. 1 is a front view showing a state where an upper die holder according to an embodiment of the present invention is attached to a press brake.

FIG. 2 is an enlarged sectional view taken along line II-II in FIG.

FIG. 3 is a perspective view showing a second embodiment.

FIG. 4 is a front view showing a third embodiment.

FIG. 5 is a left side view of the above.

[Explanation of symbols]

 1 Upper table 5 Upper mold 13 Upper intermediate plate 13G groove 15 Lower intermediate plate

Claims (2)

(57) [Claims] 1. A plurality of lower intermediate plates (15) for supporting an upper die of the press brake are attached to the lower part of an upper intermediate plate (13) attached to the lower part of an upper table (1) of the press brake. , The lower intermediate plates (1
5) The lower intermediate plates (15) are provided so as to be adjustable in the left-right direction with respect to the upper intermediate plate (13) so that the position of the gap between them can be adjusted in the left-right direction. Upper die holder for press brakes. 2. The upper die holder in a press brake according to claim 1, wherein an appropriate number of grooves (13G) opening downward are provided in a lower portion of the upper intermediate plate (15).