JPH11267774A - Work table device for plate material working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the friction to a sliding system and to improve accuracy at the time of punching and laser beam processing by disposing one end of an offset link rotatable at respective free bearing supporting members and disposing rollers for applying turning force by the action of a dog at the other end of this offset link. SOLUTION: When a carriage base 21 moves rightward, the dog 27 moves in the same direction as well. When the roller 7 rides on the tapered part 27T of the dog 27, the offset link 15 turns around a shaft 19 and the free bearing supporting member 11 falls against a center work table 3 by overcoming the energizing force of a leaf spring 13. The free bearing 9 submerges under the work table 3. Then, the interference between a work clamp 25 and the free bearing 9 is prevented. In addition, the force of the dog 27 may be reduced. The friction generated when the carriage base 21 travels may be reduced and the accuracy at the time of punching and laser beam processing may be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work table device in a plate processing machine such as a punch press or a combined punch / laser machine.

[0002]

2. Description of the Related Art Conventionally, in a sheet material processing machine such as a punch press machine or a punch / laser combined machine, for example, as shown in FIG.
01 is provided. This center work table 10
1 is mounted on a plurality of support members 105 erected on the work table base 103 at appropriate intervals.

The work table 101 is provided with a plurality of free bear supporting members 109 having free bears 107 via, for example, leaf springs 111 as urging members. 109 is urged upward, so that each free bear 107 always projects from the center work table 101.
Each free bear support member 109 is provided with a rotatable roller 113.

[0004] The plate processing machine is provided with a carriage base 115 movable in the Y-axis direction (left-right direction in FIG. 3). The carriage 117 is provided so as to be movable in a direction perpendicular to the direction. The carriage 117 is provided with a work clamp 119.
Below the work clamp 119 is provided a dog 121 which is movable in the same direction as the carriage base 117 in synchronization with the carriage base 117. With the above configuration, when the carriage base 117 moves rightward in FIG. 3, the dog 121 also moves in the same direction, and the dog 121 rides on the roller 113 as shown in FIG. When the dog 121 rides on the roller 113, the free bear supporting member 109 descends with respect to the center work table 101 against the urging force of the leaf spring 111, and the free bear 107 is lowered below the center work table 101. .
Therefore, the work clamp 119 and the free bear 107
To prevent interference.

[0005]

The free base 107 is pushed down by the high speed movement of the carriage base 115, which is a conventional slide system, but the friction at this time is very large. Also,
When the thick plate (12t) is placed on the work table 101, the plate spring 111 of the free bear 107 can withstand its weight.
Must increase the spring force. As a result, friction increases, and the
The positioning accuracy of No. 5 deteriorates, and problems such as the deterioration of punch accuracy occur. Also, when laser processing is performed by a punch / laser combined machine, vibrations and the like occur due to the friction,
There is a problem that the shape of the cut surface is deteriorated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a work table device in a plate material processing machine in which friction of a slide system is reduced and positioning accuracy is improved.

[0007]

According to a first aspect of the present invention, there is provided a work table apparatus for a plate processing machine according to the present invention, wherein a plurality of free bear supporting members having free bears are biased against a work table. The free bear support member is provided with one end of a rotatable offset link, and the other end of the offset link is provided with a roller for applying rotational force by the action of a dog. It is characterized by the following.

Therefore, for example, when the slide system moves and the dog moves and the roller rides on the dog,
Since the offset link rotates and the free bear support member provided at one end of the link descends against the urging force of the urging member, the free bear also descends and sinks below the work table.

Since the force for pushing down the free bear is reduced in accordance with the link ratio, the friction on the slide system is reduced, and the accuracy in punching and laser processing is improved.

According to a second aspect of the present invention, there is provided a work table apparatus in a plate processing machine according to the present invention, wherein a plurality of free bear supporting members provided with free bears are urged upward by an urging force of an urging member with respect to a work table. One end of a link is provided on each of the free bear support members, and the other end of the link is provided on a rotatable pinion that meshes with a rack of a work table.

Therefore, for example, the slide system moves and the rack moves to rotate the pinion. The rotation of the pinion causes the free bear support member to descend via the link against the urging force of the urging member, so that the free bear also descends and sinks below the work table.

Thus, the force for pushing down the free bear is reduced, the friction on the slide system is reduced, and the accuracy in punching and laser processing is improved.

[0013]

Embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, a work table device 1 is provided in a plate processing machine such as a punch press or a combined punch / laser machine. The work table device 1 has a fixed center work table 3 as an example of a work table in front of a plate material processing portion of a plate material. The center work table 3 is mounted on a work table base 5 at appropriate intervals. It is mounted on a plurality of support members 7 provided.

The work table 3 is provided with a plurality of free bear support members 11 having free bears 9 via, for example, leaf springs 13 as an example of biasing members. The support member 11 is urged upward, so that each free bear 9 always projects from the center work table 3. One end (upper end) of an offset link 15 is provided below each free bear support member 11.
And a roller 17 made of urethane or the like is attached to the other end (lower end) of the offset link 15.

A shaft 19 is mounted on the upper end side of the offset link 17, and the offset link 17 is rotatable clockwise in FIG.

The plate processing machine is provided with a carriage base 21 movable in the Y-axis direction (left-right direction in FIG. 1). The carriage base 21 is provided in the X-axis direction (in FIG. The carriage 23 is provided which can be moved in a direction perpendicular to the carriage 23. This College 2
The work clamp 3 is provided with a work clamp 25. A dog 27 is provided below the work clamp 25 so as to be movable in the same direction as the carriage base 21 in synchronization with the carriage base 21. The tip (right end in FIG. 1) of the dog 27 is provided with an upward tapered portion 27T.

With the above structure, when the carriage base 21 moves rightward in FIG. 1, the dog 27 also moves in the same direction, and when the roller 17 rides on the tapered portion 27T of the dog 27, the offset link 15 pivots on the shaft 19. As shown in FIG. 1, the free bear support member 11 is rotated clockwise.
The center work table 3 against the urging force of the leaf spring 13
And the free bear 9 is lowered below the work table 3. Therefore, work clamp 2
5 and free bear 9 can be prevented from interfering with each other.

At this time, if the distance between the shaft 19 and the roller 17 is A, the distance between the shaft 19 and the tip end of the offset link 15 is B, and the force for rotating the offset link 15 is b, the free bear 9 is lowered. The force C is C = B / A · b
(Kgf). Note that b> the biasing force of the leaf spring 13.

Therefore, the force of the dog 27 can be reduced by the B / A link ratio. Thus, the friction generated when the slide system, that is, the carriage base 21 travels, can be reduced, and the precision in punching and laser processing can be improved.

FIG. 2 shows another embodiment which is an alternative to FIG. In FIG. 2, the same components as those in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.

In FIG. 2, the work table base 21
Is provided with a bearing 29, and the free bear plate 3
The lower end of 1 is attached to the shaft 33 of the bearing 29. An upper end portion 31U of the free bear plate 31 is attached to a lower portion of the free bear support member 11. A coil spring 3 as an example of an urging member is provided on an upper end portion 31U of the free bear plate 21 and the work table base 21.
5 are interposed. The urging force of the coil spring 35 is constantly acting upward, and the free bear 9 projects above the center work table 3.

The upper end portion 3 of the free bear plate 31
In FIG. 2 at 1U, a bearing 37 is attached to the lower right end. One end (upper end) of a link 39 is attached to the bearing 37 by a shaft 41 and the link 3
The other end (lower end) 9 is attached with a pin 47 to a part of a pinion 45 attached to the work table base 21 via a bracket 43. A rack 49 is provided below the work clamp 35. The rack 49 is engaged with the pinion 45, and is synchronized with the carriage base 21 (not shown) in the same direction as the carriage base 21. It is designed to move.

With the above configuration, when the carriage base 21 moves to the left in FIG. 2, the work clamp 25 and the rack 49 move in the same direction. Since the pinion 45 is rotated clockwise in FIG. 2 by the movement of the rack 49, the free bear plate 31 is lowered about the shaft 33 as a fulcrum against the urging force of the coil spring 35 via the link 39. When the free bear plate 31 is lowered, the free bear 9 is also lowered together with the free bear support member 11, and
As a result, the work clamp 25 and the free bear 9 can be prevented from interfering with each other.

That is, since the free bear 9 descends,
When the work clamp 25 passes without interfering with the free bear 9 and the engagement between the rack 49 and the pinion 45 is released, the free bear 9 is raised by the urging force of the coil spring 35 and protrudes above the center work table 3. Will return to the state. The total length of the rack 49 is, for example, 300 to
At 400 mm, the pinion 45 lowers the free bear 9 with a rotational force of about 1/2, so that interference of the work clamp 25 can be avoided.

Therefore, the dog 27 shown in FIG.
As compared with forcibly pressing down, noise can be eliminated and high-speed response can be achieved. Moreover, the roller 1
7 can be used for a long time without wasting. Otherwise, the same effects as in FIG. 1 can be obtained.

The present invention is not limited to the above-described embodiment of the present invention, but can be embodied in other modes by making appropriate changes.

[0028]

As will be understood from the embodiments of the invention as described above, according to the invention of claim 1, for example, when the slide system moves and the dog moves and the roller rides on the dog, the offset occurs. Since the link rotates and the free bear supporting member provided at one end of the link descends against the urging force of the urging member, the free bear also descends and sinks below the work table.

Since the force for pushing down the free bear can be reduced in accordance with the link ratio, the friction on the slide system can be reduced, and the precision in punching and laser processing can be improved. it can.

According to the invention of claim 2, for example, the slide system moves and the rack moves to rotate the pinion. The rotation of the pinion causes the free bear support member to descend via the link against the urging force of the urging member, so that the free bear also descends and sinks below the work table.

Thus, the force for pushing down the free bear can be reduced, the friction on the slide system can be reduced, and the precision in punching and laser processing can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a work table device in a plate processing machine according to the present invention.

FIG. 2 is another side view of the work table device in the plate processing machine of the present invention.

FIG. 3 is a side view of a work table device in a conventional plate processing machine.

FIG. 4 is an explanatory diagram illustrating the operation of a work table device in a conventional plate processing machine.

[Explanation of symbols]

 Reference Signs List 1 work table device 3 center work table (work table) 5 work table base 9 free bear 11 free bear support member 13 leaf spring (biasing member) 15 offset link 17 roller 21 carriage base 25 work clamp 27 dog 31 free bear plate 35 coil spring ( Urging member) 39 link 45 pinion 49 rack

Claims (2)

[Claims] An end of an offset link rotatable with each free bear supporting member is provided by urging a plurality of free bear supporting members provided with free bears upward with a biasing force of a biasing member with respect to a work table. A work table device in a plate material processing machine, comprising a roller for providing a rotational force by the action of a dog at the other end of the offset link. 2. A plurality of free bear supporting members each having a free bear are urged upward by an urging force of an urging member with respect to a work table, and one end of a link is provided on each of the free bear supporting members. The other end of the work table is provided on a rotatable pinion that meshes with a rack of the work table.