JPH0730238Y2 - Switching unit for press die - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a switching unit for switching the processing content of a press die based on the movement of a press die member.

(Prior Art) As a conventional switching unit as described above, for example, a third
There is one for punching shown in the figure.

In the drawing, 1 is a press die for punching, 2 and 3 are upper and lower dies of the press die 1, 4 is a guide post that is erected on the lower die 3, and 5 is attached to the upper die 2. A switching unit is shown.

As shown in an enlarged view in FIGS. 4 (a) and 4 (b), the switching unit 5 supports a columnar slide block 8 on a base plate 6 through a casing 7 so that the slide block 8 can be moved up and down, and the slide block 8 is supported. , The stopper 9 prevents the stopper 10 from coming off, and the spring 11 always urges the bolt 10 upward through the bolt 10. On the other hand, the lock plate 12 having a fork-shaped tip portion straddling the bolt 10 is inserted into the upper end portion of the casing. And a slanting surface 12a directed obliquely downward is provided at the tip thereof, and a slanting surface 8a directed obliquely upward is also provided at the upper end of the slide block 8, and an air cylinder 13 is fixed to one end of the base plate 6. Then, the piston rod 13a of the air cylinder 13 is connected to the rear end of the lock plate 12, and the pierce punch 14 as a press die member is attached to the lower end surface of the slide block 8. It becomes Te.

According to such a switching unit 5, when the pierce punch 14 is used, the piston rod is operated based on the operation of the air cylinder 13.
By advancing 13a, the tip end inclined surface 12a of the lock plate 12 is brought into sliding contact with the inclined surface 8a of the slide block 8 to push down the slide block 8 against the spring 11, and thereby the lock plate 12 Can be inserted between the base plate 6 and the slide block 8 to stop the slide block 8, and thus the piercing punch 14, in the use position shown by the solid line in FIG. 4 and shown in FIG. When the piercing punch 14 is not used, the piston rod 13a is retracted based on the operation of the air cylinder 13, so that the lock plate 12 is pulled out from between the base plate 6 and the slide block 8, and thereby the spring 11
The slide block 8 and the piercing punch 14 can be urged upward with the use of the slide block 8 and the piercing punch 14 to be raised to the standby position indicated by the imaginary line in the figure.

Therefore, according to the press die 1, the upper die 2 is attached to the ram 15 of the press machine, the lower die 3 is attached to the bolster 16 of the press machine, and the urethane rubber 17 is provided around the piercing punch 14 as a stripper. In this state, the piercing punch 14 is used by the switching unit 5 to lower the upper die 2 based on the lowering of the ram 15 so that other piercing punches and dies (not shown) cooperate with each other to move the upper die 3 upward. In addition to punching holes in the workpiece 18, the urethane rubber 17 holds the workpiece 18 while
14 together with the button die 19 embedded in the lower mold 3,
The work 18 can be perforated. On the other hand, in the above-described state, the switching unit 5 sets the piercing punch to the standby position to lower the upper die 2 so that the piercing punch and the die (not shown) can be used together. Work and work 18
Piercing punch 14 and button die 19
It is possible not to perform the punching process in cooperation with.

(Problems to be solved by the invention) However, in the above-mentioned conventional switching unit, when the piercing punch 14 is held at the standby position, the spring 11
By the slide block 8, and by extension the piercing punch 14
The piercing punch 14 vibrates up and down as the ram 15 descends, and as a result, the piercing punch 14 abuts on the position where the punching process of the work 18 is not performed and scratches occur. There was a problem of sticking.

The present invention provides a switching unit that advantageously solves this problem.

(Means for Solving the Problem) A switching unit of the present invention is a mold member moving means for moving a press die member between a use position and a standby position, and a use position for stopping the press die member at the use position. A lock member, and a use position lock member locking / unlocking means for locking / unlocking the use position lock member with respect to the press die member,
Further, a standby position lock member for stopping the press die member at the standby position and a standby position lock member engaging / disengaging means for engaging and disengaging the standby position lock member with respect to the press die member are provided. Is.

(Operation) According to such a switching unit, when the press die member is used, after the die member moving means moves the die member to the use position, the use position lock member engaging / disengaging means presses the use position lock member into the press die. The die member can be engaged with the member to stop the die member in the use position.In addition, when the press die member is not used, the use position lock member engaging / disengaging means disengages the use position lock member from the press die member. From the above, it is possible to move the mold member to the standby position by the mold member moving means, and then to engage the standby position lock member with the press mold member by the standby position lock member engaging / disengaging means to stop the mold member at the standby position. .

Therefore, according to this switching unit, when the press die member is not used, the die member can be reliably held at the standby position, and therefore the die member is not unnecessarily moved and scratches the work. It can be surely prevented.

(Embodiment) An embodiment of the present invention will be described below in detail with reference to the drawings.

1 (a), (b) and (c) are a longitudinal sectional view, a lower view and a side view showing an embodiment of a switching unit of the present invention, in which 21 is a base plate.

Here, a frame-shaped casing 22 is fixed to the base plate 21, and a slide block 23 is provided in the casing 22.
In the figure (a), it is slidably fitted in the vertical direction, and a stopper 24 for preventing the slide block 23 from coming off is fixed to the lower end of the casing 22, while the upper side of the upper end of the casing 22 is fixed by a base plate 21. A guide groove 22a to be closed is formed.

In addition, at the upper end of the slide block 23, as shown in FIG.
Then, three protrusions 23a extending in the direction orthogonal to the paper surface
On the other hand, a first air cylinder 25 as a mold member moving means is provided on the base plate 21, and a piston rod 25a of the air cylinder 25 is slid through the base plate 21. A lock plate 26 as a use position lock member, which is coupled to the block 23 and has three grooves 26a that can be fitted into the protrusions 23a of the slide block 23, is provided in the guide groove 22a of the casing 22. In the figure (a), the lock plate 26 is slidably fitted in the left-right direction, and the lock plate 26 has a long hole 26a at the center thereof so that the piston rod 25a can move therethrough.
And a pin 27 for specifying the leftward movement limit position of the lock plate 26 is provided in the guide groove 22a on the right side in the drawing.

Further, a second air cylinder 28 as a use position locking member engaging / disengaging means is provided on the right side surface of the casing 22 in the drawing, and a drive plate 29 is fixed to a piston rod 28a of the air cylinder 28. The air cylinder 28 also functions as a standby position lock member hooking / unloading means, as described later.

The upper end of the drive plate 29 is engaged with a groove 26c formed downward at the right end of the lock plate 26 in the figure, while the drive plate 2
In the lower end of 9, the lock pin 30 as a standby position lock member is inserted through the rear end on the right side in the figure so as to be able to move back and forth in the left and right direction, and the tip end of this lock pin 30 is a bracket 31 described later. Further, the casing 22 is penetrated so as to be able to move forward and backward so that it can be engaged with the engaging hole 23b provided on the side surface of the slide block 23 in the standby position shown by the solid line in FIG. 1 (a). Further, the collar portion 30 is provided at the center of the lock pin 30.
a is formed, and here the lock pin 30 is mounted on the drive plate by inserting a spring 32 between the collar portion 30a and the drive plate 29.
It always urges forward with respect to 29. Also lock pin 30
A nut is screwed on the rear end of the drive pin of the lock pin 30.
Identify the forward limit position for 29 and prevent it from falling out.

A bracket 33 having a U-shaped cross section is fixed to the right side surface of the casing 22 through a bracket 31, and first and second limit valves 34 and 35 are provided on the front surface and the side surface on the other side of the bracket 33 in the figure. ,
On the side of the drive plate 29 on the front side and the other side in the figure,
The second cam plates 36, 37 are fixed.

Further, a punch punch 38 as a press die member is fixed to the lower end surface of the slide block 23.

FIG. 2 shows an air pressure circuit of the switching unit of the above embodiment, in which a switching valve 39 with four ports and three positions is provided with an air pressure source.
40 is connected to the circuits 41 and 42, respectively, and the circuit 41 is connected to the second
While connected to the head side port 28b of the air cylinder 28,
The circuit 42 is connected to the rod side port 28c of the second air cylinder 28, and both circuits 41 and 42 are connected via the shuttle valve 43 to the circuit 44.
Connect to.

Then, the circuit 44 is branched so that the first and second limit valves 34, 3
5, the first limit valve 34 is connected to the head side port 25b of the first air cylinder 25 through the circuit 45, while the second limit valve 34 is connected to the second side.
The limit valve 35 is connected to the rod side port 25c of the first air cylinder 25 via the circuit 46.

Here, the first limit valve 34 connects the circuit 44 and the circuit 45 when the cam plate 36 moves to the right in the figure based on the advance of the piton rod 28a of the second air cylinder 28 from the illustrated backward limit position. Also, the second limit valve 35 is the Piton rod 28a.
When the cam plate 37 moves to the left in the figure based on the retreat from the advance limit position of, the circuit 44 and the circuit 46 are disconnected.

According to such a switching unit, when the punch 38 for punching holes is used, the spool of the switching valve 39 is moved to the right in FIG. 2 to connect the air pressure source 40 to the circuit 41 and the exhaust port to the circuit. If it is connected to 42, the air pressure will be the second air cylinder 28
Is supplied to the head side port 28b, while the rod side port 28c is opened to the atmosphere, and the piston rod 28a is urged toward the advancing side, which locks when the sliding resistance of the lock pin 30 is small. The pin 30 is pulled by the drive plate 29, comes out of the engaging hole 23b of the slide block 23, and retreats to the right in FIG. 1 (a), and accordingly, the cam plates 36, 37.
Moves the spools of the limit valves 34, 35 to the right in FIG. 2 to the head side port 25b of the first air cylinder 25,
While air pressure is supplied through the shuttle valve 43 and the circuits 44 and 45, the rod side port 25c is connected to the exhaust port, so that the piston rod 25a is urged to the advancing (lowering) side, and therefore the slide block. 23 is lowered to the lower limit position where it abuts on the stopper 24, whereby the punch 38 can be positioned at the use position shown by the phantom line in the figure.

Further, here, the drive plate 29 is further locked by the further advancement of the piston rod 28a of the second air cylinder 28.
In FIG. 1 (a) and (b), 6 is moved to the right as shown by a phantom line to a position where the lower end surface 26d of the lock plate 26 and the upper end surface of the protrusion 23a of the slide block 23 face each other. Thus, the lock plate 26 can lock the slide block 23 at the lower limit position, and thus the punch 38 at the use position.

Here, initially, the piston rod of the second air cylinder 28
When the sliding force of the lock pin 30 is large due to the large weight of the punch 38 and the slide block 23 when the 28a is biased toward the advancing side, and the lock pin 30 is difficult to come out of the engaging hole 23b, the cam Since the plates 36 and 37 cannot move the spools of the limit valves 34 and 35, the first air cylinder 25 still remains.
While air pressure is supplied to the rod side port 25c of the head side port, while the head side port 25b is connected to the exhaust port, the piston rod 25a is biased to the backward (up) side, and therefore the slide block 23 is slightly lifted. As a result, the lock pin 30 can be easily removed, and the punch 38 can be reliably moved to the use position.

On the other hand, when the punch punch 38 is not used, the switching valve 39
Move the spool of Fig. 2 to the left to move the air pressure source 40
Is connected to the circuit 42 and the exhaust port is connected to the circuit 41, the air pressure becomes the rod side port of the second air cylinder 28.
While being supplied to 28c, the head side port 28b is opened to the atmosphere and its piston rod 28a is biased to the retracted side, and at least the width of the groove 26c of the lock plate 26, the drive plate 29 is shown in FIG. In a) and (b), the cam plates 36, 37 move the spools of the limit valves 34, 35 to the left in FIG. Air pressure is supplied to the rod side port 25c of the piston via the shuttle valve 43 and the circuits 44 and 46, while the head side port 25b is connected to the exhaust port, so that the piston rod 25a is attached to the backward (up) side. Therefore, after the drive plate 29 is further moved to the left to move the lock plate 26 to the disengagement position shown by the solid lines in FIGS. 1 (a) and 1 (b), the upper end surface of the protrusion 23a of the slide block 23 is The slide block 23 slides up to the illustrated ascending limit position where it abuts the bottom of the groove 26a of the lock plate 26. Pulled by Tonroddo 25a, thereby it can be positioned to the standby position shown punch 38 in solid line in the drawing.

The drive plate 29 also pushes the lock pin 30 in the forward direction via the spring 32 by moving to the left, but the tip of the lock pin 30 slides until the slide block 23 reaches the upper limit position. The block 23 comes into contact with the side surface of the block 23 and is prevented from moving forward, while the drive plate 29 compresses the spring 32 and moves the lock plate 26 to the left. Then, when the slide block 23 reaches the upper limit position, the lock pin 30 further advances by the pressing force of the spring 32 and enters into the engaging hole 23b, whereby the lock pin 30 causes the slide block 23 to reach the upper limit position. By the way, punch 38
Can be hooked at the standby position.

Therefore, if the switching unit of the above example is attached to a press die similar to the press die 1 shown in FIG. 3 together with a die capable of cooperating with the punch 38 for punching, the punch 38 is used for the work. It is possible to switch between the process without punching and the process for punching the hole, and according to the above switching unit, the punch 38 can be reliably held at the standby position by the lock pin 30, so the punch 38
Can be reliably prevented from unnecessarily moving and damaging the work.

Although the invention has been described above based on the illustrated example, the invention is not limited to the above-described example. For example, instead of the lock pin 30 as the standby position lock member, a member that engages and disengages with the lower surface of the slide block 23 is used. Alternatively, an electromagnetic solenoid or the like may be used instead of the air cylinder 28 as the hanging means. As the press die member, punches and dies for bending and drawing can be used in addition to the punch 38 for punching and the piercing punch in the above example.

According to the above-mentioned example, since both the lock members, that is, the locking / unlocking means of the lock plate 26 and the lock pin 30 are shared by the single air cylinder 28, the structure can be made compact and the manufacturing cost is low. The effect can be brought.

(Effect of the Invention) Thus, according to the press die switching unit of the present invention,
When the press die member is not used, the die member can be reliably held at the standby position, so that it is possible to reliably prevent the die member from unnecessarily moving and damaging the work.

[Brief description of drawings]

FIGS. 1 (a), (b) and (c) are a longitudinal sectional view, a bottom view and a side view showing an embodiment of a switching unit of the present invention, and FIG. 2 shows an air pressure circuit of the switching unit of the above example. FIG. 3 is a circuit diagram, FIG. 3 is a front view showing a partial cross-section of a press die including a conventional switching unit, and FIGS. 4A and 4B are vertical sectional views and bottom views showing the conventional switching unit. Is. 25 …… First air cylinder, 26 …… Lock plate 28 …… Second air cylinder, 30 …… Lock pin 38 …… Punch for punching holes

Claims (1)

[Scope of utility model registration request] 1. A die member moving means (25) for moving a press die member (38) between a use position and a standby position, and a use position lock member (26) for stopping the press die member at the use position. And a use position lock member engagement / disengagement means (28) for engaging and disengaging the use position lock member with respect to the press die member, wherein the switching unit switches the processing content of the press die based on the movement of the press die member. A standby position lock member (30) for stopping the press die member at the standby position, and a standby position lock member engagement / disengagement means (28) for engaging and disengaging the standby position lock member with respect to the press die member. A switching unit for a press die, which is characterized in that