JPS6347380Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention provides a method for press processing such as punching, cutting, bending, drawing, etc., in which certain press processing is applied to some of the supplied workpiece materials. However, if the specified press process is not applied to other items, or if the specified press process is applied to some of the workpiece materials, but the specified press process is not applied to other items. The present invention relates to a punch switching device used when punching is performed at a different position.

(Prior art) Conventionally, a punch holder that moves up and down under the pressure of a press ram has been used as a punch switching device for punching holes at different positions on the right vertical frame material and left vertical frame material of aluminum sash, for example. When holding multiple punches so that they can move up and down with a sliding space above them, and punching a hole at a predetermined position on the right vertical frame material, hold the punch in the upper sliding space of the punch corresponding to the planned hole punching position. , When pressing is performed by inserting a liner to restrain the upward slide of the punch, and then punching a hole in a position different from that of the right vertical frame material on the left vertical frame material, the planned hole punching position. It is known that pressing is performed by replacing the liner in the upper slide space of the punch corresponding to the punch. However, with this conventional equipment, when pressing is performed by continuously supplying vertical frame materials and horizontal frame materials at different pressing positions alternately, it takes time to replace the liner, reducing work efficiency. In addition, mechanically automating the replacement of the liner would result in a complicated and large device.

(Problems that the invention attempts to solve) This invention involves alternating specific pressing processes,
It is an object of the present invention to provide a punch switching device capable of performing a specific press work at different positions alternately.

(Means for Solving the Problems) In order to achieve the above object, the present invention forms a switching chamber in a punch holder box that is supported so as to be movable up and down so as to receive the pressurization of the press ram on the upper surface, and A punch is slidably held on the bottom wall of the switching chamber at one or both of the left and right ends of the bottom surface of the switching chamber so that the upper end of the punch can move forward and backward into the switching chamber, and a punch restraining lever is held within the switching chamber to switch the switching chamber. The restraining lever is inserted so as to be slidable from side to side at positions corresponding to the left and right ends of the chamber bottom surface, and the pin protruding from the top of the restraining lever is inserted about the vertical center line of the switching chamber provided on the front and rear walls of the switching chamber. While engaging the symmetrical valley-shaped guide groove, the pin is always springed against the valley-shaped bottom of the guide groove by a spring, so that the restraining lever normally has its upper end on one side offset from the longitudinal center line. The switching actuating rod is supported through the upper wall of the switching chamber so as to be able to move forward and backward into the switching chamber on the vertical center line, and the lower end of the operating rod is constantly supported by a spring in the switching chamber. The upper end of the actuating rod protrudes from the upper surface of the punch holder box by retreating from the chamber, and when the actuating rod is pushed by the press ram and enters the switching chamber, the restraining lever in the neutral position is held so that its lower end is on one side of the bottom surface of the switching chamber. The configuration is such that the positional relationship is such that the actuator is displaced to an operable position where it stands up near the end.

(Example) Figures 1, 2, and 3 show an example of a punch switching device that alternately performs and does not perform punch press processing. The mold plate 3 is penetratingly supported so as to be able to rise and fall freely, and the upper mold plate 3 is constantly urged upward by the coil springs 4, 4 wound around the pillars 2, 2, and one hole punching mold is placed on the lower mold plate 1. A lower mold 5 having a hole 6 is fixed, and a punch holder box 7 having a hole punch 8 and a punch switching mechanism inside is fixed to the upper mold plate 3 at a position opposite to the mold hole 6. It has been done.

The punch holder box 7 includes an upper box 9 fixed to the upper and lower surfaces of the upper mold plate 3, a lower box 10, and an intermediate upper mold plate 3.
A switching chamber 11, which is substantially rectangular when viewed from the front, is formed inside these three parts, and a vertical center line l as seen from the front of the switching chamber 11 is formed on the bottom wall of the switching chamber 11 as a boundary. Opens on one side of the bottom of the switching chamber,
A punch holding hole 12 is formed perpendicularly through the lower end surface of the holder box 7, and the upper end of the holding hole 12 is formed into a flat hole large diameter portion 13 with a slightly larger diameter, and the punch 8 is attached to the flange portion at the upper end. 14 is engaged with the large diameter portion 13 and is held in the holding hole 12 so as to be vertically slidable while being prevented from being removed downward.

The punch switching mechanism is as follows. A punch restraining lever 15 is slidably installed inside the switching chamber 11, and the restraining lever 15 is slightly shorter than the vertical length of the switching chamber 11 and has a width that is one third of the width of the switching chamber 11 when viewed from the front. It is a square bar with a rectangular cross section, and its upper end is formed into a chevron-shaped switching guide part 16 of an isosceles triangle when viewed from the front, and a roller 17 is attached to its lower end.
A pin 18 is passed through in the front and back direction at a position close to 6, and both ends of the pin 18 are slidably engaged in gently sloped valley-shaped guide grooves 19, 19 provided on both front and rear walls of the switching chamber 11. While holding the pin, both ends of the pin protrude to the outside, and the guide grooves 19, 19
is inclined symmetrically with the bottom of the valley located on the vertical center line l, and a spring receiving pin 2 protrudes on the vertical center line l below this guide groove.
Tension coil springs 21, 21 are connected between 0, 20 and both protruding ends of the pin 18, so that the pin 18 is always pulled against the valley-shaped bottoms of the guide grooves 19, 19. On the other hand, a through hole 22 with a rectangular cross section is provided in the upper wall of the switching chamber 11, located on the vertical center line l, opening at the upper surface of the switching chamber 11, and penetrating perpendicularly to the upper end surface of the holder box 7. Hole 22
The switching actuation rod 23 is slidably inserted into the punch restraining lever 15 when viewed from the front.
The switching selection part 2 is a square bar with a rectangular cross section and has the same width as , and has an isosceles triangular valley shape when viewed from the front at its lower end.
4, and a coil spring 26 is installed between the spring receiving plate 25 fixed at right angles to the upper end portion and the upper die plate 3, and is always urged upward by the spring 26. The operating rod 23 is normally retracted into the through hole 22 at the tip of the selection portion 24 at its lower end, but has a length that allows it to enter the intermediate position of the switching chamber 11 when pushed downward.

Looking at the relationship between the restraining lever 15, the guide groove 19, and the actuating rod 23, the restraining lever 15
When not in operation, the pin 18 is placed at the valley bottom of the guide groove 19 as shown in the first and second figures, and the roller 1 at the lower end is
7 at one end of the bottom surface of the switching chamber 11 (the right end in the figure), and the switching guide section 1 at the upper end.
6 A tilted state in which the tip is slightly offset from the center line l on the opposite side of the roller 17 (tilted to the left in the figure)
Therefore, when the actuating rod 23 is pushed down, the tip of the switching selection section 24 slides on the side opposite to the inclined side (the left side in the figure) of the restraint lever 15 and moves to the neutral position. Move the restraint lever 15 to the original slope and raise it vertically,
Finally, the roller 17 is positioned at the other end of the bottom surface of the switching chamber 11 (the left end in the figure) and is displaced to the vertically operable position (the position indicated by the two-dot chain line in FIG. 2). The restraint lever 15 in the operable position is
Its rightward movement is prevented by the actuating rod 23, its longitudinal and leftward movements are prevented by the inner wall surface of the switching chamber 11, and its upward movement is prevented by the pin 18 engaging with the left end of the guide groove 19. It is prevented by this. The positions, groove lengths, and inclination angles of the guide grooves 19, 19 are designed to allow movement of the restraining lever 15.

When the actuating rod 23 is pulled up, the restraining lever 15, which was in the vertical position, has its pin 18 pulled up by the spring 2.
1, 21 and tilts opposite to the above (right tilt)
assumes the neutral position.

When the actuating rod 23 is pushed down again, the restraining lever 1
5 is displaced to the operable position on the opposite side (right side).

In use, the first and second shown restraining levers 1
5 is in the neutral position tilting to the left, the right vertical frame material of the aluminum sash is placed on the lower die 5 and the lower die of the other press machines, and then the press ram is lowered onto the punch holder box 7. is pushed down by the press ram, and the restraining lever 15 is moved to the left operable position (the position indicated by the chain line), and the roller 17 at its lower end is positioned on the upper end surface of the punch, thereby restraining the punch 8 from rising. After the actuating rod 23 has descended to its lowest limit, the pressing force of the press ram is applied to the upper surface of the punch holder box 7, and is then transmitted to the punch 8 via the pin 18 of the guide groove 19, the restraint lever 15, and the roller 17. , the punch performs desired press working with the lower die 5 along with other press working.

Next, when the press ram rises, the box 7 rises to its original position by the springs 4, 4, and then the operating rod 2
3 is raised by the spring 26, whereby the restraint lever 15 assumes the neutral position of rightward tilt by the spring 21.

Next, the left vertical frame material is placed on the lower mold 5 and the lower molds of other presses, and then the press ram is lowered again, and the operating rod 23 is lowered to displace the restraining lever 15 to the right operable position. to unrestrict punch 8 on the left. Then, the box 7 descends and the unrestrained punch 8 comes into contact with the frame material, but the punch 8 rises and does not press. Thereafter, in the same manner, the left and right vertical frame materials are alternately supplied, and the processing with the punch 8 is performed on the left vertical frame material, but not on the right vertical frame material, and this operation is repeated.

Another embodiment shown in FIG. 4 is a restraint lever 15a.
Two punches 8a, 8a' are arranged at positions corresponding to the left and right operable positions, and the other structures are the first,
In an example substantially the same as that shown in FIGS. 2 and 3, the two punches 8a and 8a' are alternately restrained each time the press ram is driven, so that pressing can be performed alternately at different positions.

(Effects of the invention) The punch switching device of this invention automatically alternates pressing with the punch each time the press ram is driven, when the punch is held at one of the left and right ends of the bottom wall of the switching chamber. If two punches are held at the left and right ends of the bottom wall of the switching chamber, the two punches will automatically alternately press to different positions each time the press ram is driven. Since it can be processed, it is possible to significantly improve work efficiency, and since the structure is extremely simple, it can be made smaller and less expensive. Therefore, when a plurality of processing dies are attached to one press apparatus and processing is performed, it can be effectively used when it is desired to perform different processing for each press stroke on only one of the processing dies.

[Brief explanation of drawings]

The drawings show an embodiment of this invention, and FIG. 1 is a front view of the die set, FIG. 2 is a longitudinal sectional front view of the punch holder block, and FIG. FIG. 4 is a longitudinal sectional front view of the punch holder block portion of another embodiment. 7, 7a... Punch holder box, 8, 8
a...Punch, 11, 11a...Switching chamber, 15,
15a... Punch restraint lever, 18, 18a...
Pin, 19, 19a... Valley guide groove, 21...
Spring, 23, 23a...Switching operation rod, l...Vertical center line.

Claims (1)

[Scope of Claim for Utility Model Registration] A switching chamber is formed in a punch holder box that is supported so as to be able to rise and fall so as to receive the pressurization of the press ram on the upper surface, and a punch is mounted on the bottom wall of the switching chamber on the left and right sides of the bottom surface of the switching chamber. The upper end of the punch is slidably held at one or both of the side ends so that it can move forward and backward into the switching chamber, and within the switching chamber, the punch restraining lever is moved left and right to positions corresponding to the left and right ends of the bottom surface of the switching chamber. The restraining lever is slidably inserted, and the pin protruding from the upper part of the restraining lever engages with a valley-shaped guide groove symmetrical about the vertical center line of the switching chamber, which is formed on the front and rear walls of the switching chamber. A pin is constantly urged against the valley-shaped bottom of the guide groove by a spring, so that the restraining lever is normally placed in an inclined neutral position with its upper end positioned on one side offset from the vertical center line, and the above-mentioned switching is performed. The switching actuation rod is supported through the upper wall of the chamber so that it can move forward and backward into the switching chamber on the vertical center line, and the lower end of the actuating rod is constantly retracted from the switching chamber by a spring, and the upper end of the actuating rod is attached to the upper surface of the punch holder box. When the actuating rod is pushed by the press ram and enters the switching chamber, the restraining lever in the neutral position is moved to an operable position in which its lower end stands up against one end of the bottom surface of the switching chamber. Punch switching device in positional relationship.