JP3744593B2 - Mobile foot pedal for press brake - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of a foot pedal in which an operator operates the drive of the ram in a press brake that presses and bends the workpiece by moving the ram up and down.
[0002]
[Prior art]
A conventional apparatus for bending a sheet metal material (hereinafter referred to as a press brake) has a configuration in which a ram is moved up and down to press and bend a workpiece. A general configuration is that the pedal or the bar pedal is stepped on and driven.
[0003]
FIG. 4 is an explanatory diagram showing an outline of an example of a conventional press brake. A bar pedal 3 for controlling the vertical movement of the ram 2 of the machine body 1 of the press brake is provided at the lower front portion of the machine body 1, and an operator operates the ram by stepping on the bar pedal 3 with his / her foot. To implement.
[0004]
FIG. 5 is an explanatory diagram showing an outline of another example of a conventional press brake. A foot pedal 6 connected to a circuit in a control box 4 that electrically controls the vertical movement of the ram 2 of the machine body 1 of the press brake by a cable 5 is provided. The machining operation is carried out.
[0005]
[Problems to be solved by the invention]
However, in the conventional press brake shown in FIG. 4, as shown in FIG. 6, when the longitudinal dimension of the workpiece W increases, the worker P does not reach the bar pedal 3 and the ram 2 moves up and down. It becomes impossible to operate. Further, when the worker's work position is separated from the bar pedal 3 in the lateral direction, it is difficult or impossible to operate the ram 2 up and down.
[0006]
In the conventional press brake shown in FIG. 5, as shown in FIG. 7, in the process of moving the workpiece P and performing step bending, the worker P first works at the processing place on the left side. Next, move to the right processing place and work. However, if the foot pedal 6 is not moved, the worker P cannot reach the foot pedal 6, cannot operate the vertical movement of the ram 2, and cannot work.
[0007]
The present invention has been made to solve the above-mentioned conventional problems, and the position of the foot pedal is moved in accordance with the size of the workpiece, the bending shape, the place to be bent, and the position of the mold to be processed. It is an object of the present invention to provide a movable foot pedal for a press brake that can be applied.
[0008]
[Means for Solving the Problems]
For this reason, the movable foot pedal for press brakes according to the present invention achieves the object by the following configuration.
[0009]
(1) In a press brake that presses and bends the workpiece by moving the ram up and down, the ram is calculated by an NC device corresponding to the foot pedal that the operator operates and the machining specifications of the workpiece. determined mobile foot pedal for a press brake, characterized in that it comprises a position movement means for moving drive the position of the foot pedal placement position of the foot pedal.
[0010]
(2) the position moving unit, the term before which is characterized by comprising a foot pedal from a ball screw drive mechanism that can move the drive in the left-right direction (1) Mobile foot pedal for press brake according to the machine body .
[0011]
(3) The position moving means can move and drive the foot pedal in the left-right direction described in (2) above with respect to the machine body, and can move and drive the ball screw drive mechanism in the front-rear direction. machine body of the air cylinder set digit pairs left and right frame, movable foot pedal for a press brake of the front section (1), wherein the consist.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The movable foot pedal for press brake according to the present invention has position moving means for moving the position of the foot pedal to an appropriate arrangement position of the foot pedal determined in accordance with the processing specification of the workpiece. This is an embodiment.
[0013]
This embodiment will be described based on examples.
[0014]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0015]
FIG. 1 is an explanatory view showing a configuration of an embodiment of a movable foot pedal for press brake according to the present invention, (a) showing a top surface, (b) showing a side surface, and (c) showing a front surface. Show.
[0016]
In this embodiment, a pair of left and right air cylinders 8 are fixed to the left and right frames 7 of the machine body 1, and the piston tip of the air cylinder 8 serves as a bearing for a ball screw 9. 6 is fixed. A motor 10 for driving the ball screw 9 is fixed to the tip of one piston of the air cylinder 8.
[0017]
With the above configuration, the foot pedal 6 can be moved in the front-rear direction with respect to the machine body 1 by driving the air cylinder 8, and can be moved in the left-right direction by rotating the ball screw 9 by the motor 10.
[0018]
In the present embodiment, the length L of the workpiece as shown in FIG. 2 is calculated by the operator from the “size of workpiece” and “bending shape” input to the computer NC. Further, the center line in the left-right direction of the workpiece is determined from the BP (bending position) of the data of the computer NC. The center point C of the rear end of the workpiece W is determined from the above-described protrusion length L and the center line in the left-right direction, as shown in FIG.
[0019]
The position of the foot pedal 6 is calculated based on the center point C of the rear end of the workpiece W that has been found. The calculation formula is created from experimental values.
[0020]
Then, the air cylinder 8 and the ball screw 9 are driven so that the foot pedal 6 is positioned at the calculated position of the foot pedal 6.
[0021]
(Other examples)
In another embodiment of the present invention, as a means for moving the foot pedal 6 in the front-rear direction with respect to the machine body 1, in the above-described embodiment, the pair of left and right air cylinders 8 are fixed and rotated by a motor. A pair of left and right screws are provided, and a nut portion of the ball screw 9 is fixed to a screwed nut. The screws and nuts are preferably ball screws.
[0022]
By comprising in this way, the freedom degree of the movement in the front-back direction of a foot pedal becomes high.
[0023]
In another embodiment, the motor 10 is not provided with means for moving the foot pedal 6 in the front-rear direction with respect to the machine body 1 and is projected from the lower front side of the machine body toward the front side. The ball screw 9 and the foot pedal 6 can be provided, and the foot pedal 6 can be moved only in the left-right direction with respect to the machine body 1. Depending on the user, there is an example in which processing can be sufficiently performed with this configuration, and it can be assumed that the configuration is preferred because the configuration is simple.
[0024]
【The invention's effect】
As described above, according to the present invention, the foot pedal can be mechanically moved according to the shape of the workpiece and the bending specifications, and the troublesome labor of moving the foot pedal manually can be saved. In addition, the user can be prevented from operating the foot pedal in an unstable posture.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a configuration of an embodiment.
FIG. 2 is an explanatory diagram for calculating a protruding length of a workpiece according to an embodiment.
FIG. 3 is an explanatory diagram for calculating a center point of a rear end of a workpiece according to an embodiment.
FIG. 4 is an explanatory diagram of a conventional apparatus.
FIG. 5 is an explanatory diagram of another example of a conventional device.
FIG. 6 is an explanatory diagram of a problem of a conventional device.
FIG. 7 is an explanatory diagram of a problem of another example of the conventional device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Press brake machine body 2 Ram 3 Bar pedal 4 Control box 5 Cable 6 Foot pedal 7 Left and right frame 8 Air cylinder 9 Ball screw 10 Motor C Center point L of work material rear end Projection length P Work material W Work material

Claims (3)

In a press brake that presses and bends the workpiece by moving the ram up and down, it is determined by calculating with an NC device corresponding to the foot pedal that the operator operates to drive the ram and the machining specifications of the workpiece mobile foot pedal for a press brake, characterized in that it comprises a position movement means for the moving drive the position of the foot pedal placement position of the foot pedal. It said position moving means, according to claim 1 Press movable foot pedal brake according to characterized in that it consists of a ball screw drive mechanism that can move driving the foot pedal in the lateral direction with respect to the machine body. The said position movement means is a ball screw drive mechanism which can move and drive the said foot pedal to the left-right direction with respect to a machine main body, and the right and left of the machine main body which can move and drive this ball screw drive mechanism to the front-back direction. an air cylinder setting digit pairs to the frame, claim 1 Press movable foot pedal brake according to characterized in that it consists of.

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