JPH09276937A - Plate bending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bend a plate of left/right unsymmetrical with simple constitution in bending requiring an auxiliary blade. SOLUTION: An upper side auxiliary blade 4A and lower side auxiliary blade 4B, which are slidable symmetrically in each blade width direction, are arranged along blade edge parts 3A, 3B of a blade 3. An individual transfer release means 35 to individually stop symmetrical movement of each auxiliary blade 4A, 4B is arranged. Upper/lower and left/right auxiliary blades 4A, 4B are connected with an endless belt 20. The individual transfer release means 35 is arranged at the original position of auxiliary blades 4A, 4B which are to be both end positions of a bending blade 3, connection of the endless belt 20 is released by taking out-putting in of a pin 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate material bending machine for performing bending such as edge bending of a plate material.

[0002]

2. Description of the Related Art As a plate material bending machine for bending an end of a plate material,
A plate having a plate material sandwiching part for sandwiching the plate material and a bending blade for bending the sandwiched plate material with a predetermined motion are generally used. However, when a bending piece A at the left and right ends of a plate material W as shown in FIG. 11A, which is a box material, is bent by this type of plate bending machine as shown in FIG. Since the position of a is deviated from the bending line b of the intermediate bending piece B, the bending work cannot be performed with a normal bending blade. That is, when the bent pieces A at both ends are bent, the intermediate bent piece B interferes with the bending blade at a position different from the bending line b. However, the bending work in which the bending lines are slightly deviated in this way is often necessary when constructing a box body in which bent pieces are stacked on each other. Therefore, conventionally, in such a bending process, a plate material folding machine provided with an auxiliary blade that is symmetrically slidable in the blade width direction along the blade tip portion of the bending blade has been used. That is, the bending work of the bent pieces A at both ends of the plate material W was performed using the auxiliary blade.

[0003]

However, in the conventional moving structure of the auxiliary blade, since the auxiliary blades on both sides move symmetrically, left-right asymmetric bending cannot be performed. Therefore, the type of processing was limited. If the left and right auxiliary blades are moved by separate driving devices instead of the moving means for symmetrical movement, asymmetric processing is possible, but since the number of driving devices increases, the structure becomes complicated and the cost is also high. Significantly higher.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a plate material bending machine which has a simple structure and is capable of bending a plate material having asymmetrical left and right shapes.

[0005]

In order to solve the above-mentioned problems, the present invention provides a plate material folding machine having a plate material holding portion for sandwiching a plate material and a bending blade for bending the sandwiched plate material in a predetermined motion. The left and right auxiliary blades that can be slid symmetrically in the blade width direction along the blade tip portion of the bending blade are provided, and the individual transmission canceling means that individually stops the symmetrical movement of the left and right auxiliary blades is provided. According to this configuration, the normal bending process is performed without using the auxiliary blade, and the bending process is performed using the auxiliary blade when processing the bent pieces in which the bending lines are slightly displaced. In this case, if bilaterally symmetrical bending is sufficient, the left and right auxiliary blades are slid symmetrically and moved to a position where bending by the auxiliary blade is possible. In the case of left-right asymmetrical bending, the movement of one auxiliary blade is stopped by the individual transmission canceling means, and only the other auxiliary blade is moved. In this way, in addition to the normal bending work and the left-right symmetrical bending work in which the bending line is slightly deviated, the bending work in which the bending line is slightly deviated and left-right asymmetric can be performed. In addition, the left and right auxiliary blades are moved symmetrically, and by stopping the movement of one auxiliary blade by the individual transmission releasing means, asymmetrical movement is performed. Only one is required, and the structure is simpler and the cost can be reduced as compared with the case where drive means are individually provided for the left and right auxiliary blades. It also becomes compact.

In the plate material folding machine of this construction, the left and right auxiliary blades are connected to one belt mechanism, and the individual transmission releasing means is the belt mechanism of one auxiliary blade at the origin position of the auxiliary blade on the bending blade. The connection with may be released. In the case of this configuration, the left and right auxiliary blades can be moved symmetrically with one belt mechanism, and the auxiliary blades and belt mechanism can be disconnected by the individual transmission releasing means to selectively select the necessary auxiliary blades. It can be moved. Further, the bending blade has an upper bending blade and a lower bending blade, and the left and right auxiliary blades are an upper auxiliary blade and a lower auxiliary blade that are slidable along the upper bending blade and the lower bending blade, respectively. It may have a blade. With this configuration, left-right asymmetric bending can be performed for both upward bending and downward bending.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the plate material folding machine 1 includes a plate material holding portion 2 for sandwiching the plate material W, and a bending blade 3 for bending the sandwiched plate material W in a predetermined motion. The plate material sandwiching section 2 includes an upper mold 2a that is provided in the main body frame 5 of the plate material folding machine 1 and that is driven up and down to change the mold width, and a wide lower mold 2b fixed to the main body frame 5. Bending blade 3
Is supported by the main body frame 5 via a link 6, is connected to the three actuators 7 to 9, and
It is possible to oscillate around a and to move slightly up and down and back and forth.

The bending blade 3 has an upper bending blade 3A used for downward bending of the plate material W and a lower bending blade 3B used for upward bending. As shown in FIG. 2, the lower bending blade 3B is provided with a pair of left and right lower auxiliary blades 4B, 4B which are symmetrically slidable along the blade edge in the blade width direction. That is, both auxiliary blades 4B are fixed to the tip of the L-shaped support member 11 as shown in FIG. 5, respectively, and the lower end of the bending blade frame 12 at a position slightly retracted from the tip of the bending blade 3 and this bending blade 4B. Guide rails 14B extending in the blade width direction of the bending blade 3 are provided over the lower ends of the support plates 13 (FIG. 2) extending from the left and right ends of the frame 12. As shown in FIG. 5, a linear bearing 15 is provided on the vertical piece 11a that is the base end of the support member 11, and the linear bearing 15 is engaged with the guide rail 14B.
As a result, both auxiliary blades 4B can smoothly slide along the guide rails 14B.

A belt mechanism 18 is provided above the guide rail 14B in parallel with the guide rail 14B. The belt mechanism 18 includes a pair of left and right members provided on the front surfaces of the support plates 13 extending from the left and right ends of the bending blade 3, respectively, as shown in FIGS. An endless belt 20 is hung between the pulleys 19 and 19, and one pulley 19 is rotationally driven by a motor 21 provided on the back surface of the support plate 13.

The auxiliary blades 4B on both sides are connected to the endless belt 20 via a connecting portion 22 provided on the vertical piece 11a at the rear end of the supporting member 11. Further, when viewed from the front, the lower auxiliary blade 4B closer to the right end is coupled to the upper path portion of the endless belt 20, and the lower auxiliary blade 4B closer to the left end is connected to the endless belt 2.
0 is connected to the lower path part. As a result, when the endless belt 20 rotates in one direction (counterclockwise when viewed from the front), both auxiliary blades 4B symmetrically move toward the center position of the bending blade 3 and the endless belt 20 moves in the opposite direction. When rotated, both auxiliary blades 4B move symmetrically toward the respective origin positions at both ends of the bending blade 3.

A coupling portion 22 provided on the support member 11
As shown in FIGS. 5 and 6, the connecting piece 26 is directly connected to the endless belt 20 and has the pin engaging hole 25 in the lower side portion.
And an engaging / disengaging member 27 having a pin 28 that can be engaged / disengaged with the pin engaging hole 25. The engagement / disengagement member 27 is the pin 2
8 and the guide pin 32 therebelow are provided on the back surface of the inter-pin connecting body 29 so as to project. The inter-pin connecting body 29 is arranged on the front surface of the vertical piece portion 11a of the support member 11, and the pins 28 and 32 are provided with a guide hole 30 formed in the vertical piece portion 11a of the support member 11 and a vertical piece portion. Each of them is inserted into and removed from a guide sleeve 31 provided on 11a. A return spring 33 is provided inside the guide sleeve 31 on the outer periphery of the guide pin 32, and the return spring 33 urges the engagement / disengagement member 27 in the direction of drawing it into the guide sleeve 31.

On the back side of the left and right support plates 13 which are the origin positions of the auxiliary blades 4B on both sides, both auxiliary blades 4B are attached to the endless belt 2.
Individual transmission canceling means 35 for individually canceling transmission to 0 are provided. These individual transmission canceling means 35
Is a means for releasing the coupling of the auxiliary piece 4B to the endless belt 20 by the coupling portion 22, and is composed of a cylinder device. By pushing the guide pin 32 of the connecting portion 22 with the advancing / retreating rod 36 of this cylinder device, the engaging / disengaging member 27 is pushed forward, whereby the engagement of the pin 28 is released from the pin engaging hole 25 of the connecting piece 26, and the endless Release the connection of the auxiliary blade 4B to the belt 20.

The feeding operation of the auxiliary blade 4B having the above structure will be described. The left and right lower auxiliary blades 4B are normally made to stand by at the origin positions at both ends of the bending blade 3 as shown in FIG. 2, and bending is performed only by the bending blade 3 without using these auxiliary blades 4B. When the auxiliary blade 4B is used, the auxiliary blade 4B is coupled to the endless belt 20 of the belt mechanism 18 and the belt mechanism 18 is driven to move the endless belt 20 in a predetermined direction (see FIG.
In the counterclockwise direction). As a result, the auxiliary blades 4B on both sides toward the center position of the bending blade 3 slide symmetrically in the blade width direction along the blade tip portion of the lower bending blade 3B. When the rotation of the endless belt 20 is stopped, the auxiliary blades 4B on both sides stop at symmetrical positions. In this way, by disposing the auxiliary blades 4B on both sides at symmetrical positions, the bending pieces A, A on both the left and right sides of the symmetrical plate material W as shown in FIG. 11, for example, can be upwardly bent at the same time. When the endless belt 20 is rotated in the opposite direction, the auxiliary blades 4B on both sides are
Can be returned to the origin.

When it is desired to move only one of the auxiliary blades 4B, the individual transmission canceling means 35 corresponding to the one of the auxiliary blades 4B to be kept in the standby state is operated with the auxiliary blades 4B on both sides returned to the origin position. Let That is, the advancing / retreating rod 36 is extended. Thereby, the guide pin 3 of the engaging / disengaging member 27
2 is pushed, the engaging / disengaging member 27 moves forward, and the connecting piece 26
The pin 28 is disengaged from the pin engaging hole 25 of.
After the releasing operation, when the belt mechanism 18 is rotated, only the lower auxiliary blade 4B that has not been uncoupled is moved to the endless belt 2
It is moved by turning 0. As a result, only one bending piece of the asymmetric plate material W can be bent upward. The auxiliary blade 4B with the pin 28 uncoupled is left at the original position without the rotation of the endless belt 20 being transmitted. At this time, by keeping the advancing / retreating rod 36 of the individual transmission canceling means 35 fitted in the sleeve 31, it is possible to prevent the auxiliary blade 4B left at the origin position from being displaced due to vibration or the like. Therefore, when the auxiliary blade 4B on the moving side is returned to the origin and the auxiliary blades 4B on both sides are connected to the endless belt 20 again, the positions of the pin 28 and the pin engaging hole 25 do not shift, and the individual transmission canceling means 35 is provided. By shortening the advancing / retreating rod 36, the restoring force of the return spring 33 can surely rejoin the pin 28 and the pin engaging hole 25.

8 to 10 show a plate material folding machine according to another embodiment of the present invention. This plate bending machine 1A
In addition to the configuration of the embodiment shown in FIGS. 1 to 7, the left and right upper auxiliary blades 4A which are symmetrically slidable in the blade width direction along the blade tip portion of the upper bending blade 3A of the bending blade 3 are provided. , 4A are added. Left and right upper auxiliary blades 4
The connecting structure of A to the endless belt 20 is the same as the connecting structure of the lower auxiliary blade 4B in the previous embodiment. Further, the origin positions of the left and right upper auxiliary blades 4A are the same as the origin positions of the lower auxiliary blade 4B, and the individual transmission releasing means 35 for uncoupling the upper auxiliary blade 4A from the endless belt 20 at those origin positions. Are provided in the same manner as for the lower auxiliary blade 4B. Therefore, the four auxiliary blades 4A, 4A,
4B and 4B respectively corresponding to four individual transmission canceling means 3
5 will be provided. The guide rail 14A that smoothly slides the upper auxiliary blade 4A also includes the upper end of the bending blade frame 12 and the bending blade frame 12.
Is provided over the upper end of the support plate 13 extending from both left and right ends of the. A linear bearing 15 is also fixed to the vertical piece 11a of the support member 11 of the upper auxiliary piece 4A, and the linear bearing 15 is engaged with the guide rail 14A. As a result, the left and right upper auxiliary blades 4A can be smoothly slid along the guide rails 14A. Other configurations are the same as those of the above embodiment.

In the case of the plate material folding machine 1A having this structure, the left and right upper auxiliary blades 4A are arbitrarily and selectively used not only in the upward bending process but also in the downward bending process to form an asymmetrical shape. Bending of the plate material W can be performed.

[0017]

The plate bending machine of the present invention is provided with the left and right auxiliary blades that can be slid symmetrically along the blade edge of the bending blade in the blade width direction, and the symmetrical movements of the left and right auxiliary blades are individually provided. Since the individual transmission releasing means for stopping is also provided, the left and right auxiliary blades can be bent symmetrically while bending the plate material that is asymmetrical to the left and right when performing bending work that requires the auxiliary blade while also serving as a drive source that symmetrically moves. It can be carried out. In the case of the invention of claim 2, the left and right auxiliary blades are connected to one belt mechanism, and the individual transmission canceling means is connected to the belt mechanism of one auxiliary blade at the origin position of the auxiliary blade arranged on the bending blade. Since the connection between the two is released, the configuration for selectively moving the necessary auxiliary blades can be realized with a simple mechanism. In the invention of claim 3, the bending blade has an upper bending blade and a lower bending blade, and the left and right auxiliary blades slide along the upper bending blade and the lower bending blade, respectively. Since it has a possible upper auxiliary blade and lower auxiliary blade, it is necessary to use an auxiliary blade for both upward bending and downward bending, and it is possible to perform bending of plate materials with asymmetrical left and right shapes. it can.

[Brief description of drawings]

FIG. 1 is a side sectional view of a plate material folding machine according to an embodiment of the present invention.

2A to 2D are a front view, a plan view, a left side view and a right side view of a main part of the plate material folding machine.

FIG. 3 is a partially cutaway front view of the plate material folding machine.

FIG. 4 is a partially cutaway plan view of the plate material folding machine.

FIG. 5 is a left side view of a main part of the plate material folding machine with a part broken away.

FIG. 6 is an enlarged cross-sectional view of a part of FIG.

FIG. 7 is a right side view of a main part of the plate material folding machine.

FIG. 8 is a partially cutaway front view of a plate bending machine according to another embodiment of the present invention.

FIG. 9 is a left side view of a main part of the plate bending machine.

FIG. 10 is a right side view of a main part of the plate material folding machine.

FIG. 11 is an explanatory diagram of a plate bending process according to a conventional example.

[Explanation of symbols]

2 ... Plate material holding portion, 3 ... Bending blade, 3A ... Upper bending blade, 3B
... Lower bending blade, 4A ... Upper auxiliary blade, 4B ... Lower auxiliary blade,
14A, 14B ... Guide rails, 18 ... Belt mechanism, 2
2 ... coupling part, 35 ... individual transmission releasing means

Claims (3)

[Claims] 1. A plate material folding machine having a plate material holding portion for sandwiching a plate material, and a bending blade for bending the sandwiched plate material with a predetermined motion, wherein the plate material folding machine is symmetrical in a blade width direction along a blade edge portion of the bending blade. Plate bending machine with left and right auxiliary blades that can be slidably moved and individual transmission canceling means that individually stop symmetrical movements of the left and right auxiliary blades. 2. The left and right auxiliary blades are connected to one belt mechanism, and the individual transmission releasing means releases the connection between one auxiliary blade and the belt mechanism at the origin position of the auxiliary blade on the bending blade. The plate material folding machine according to claim 1, which is a machine. 3. The bending blade has an upper bending blade and a lower bending blade, and the left and right auxiliary blades are slidably movable along the upper bending blade and the lower bending blade, respectively. The plate material folding machine according to claim 1 or 2, further comprising a side auxiliary blade.