JPH0321770Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mold gripper for replacing molds, and more specifically, the present invention relates to a mold gripper for replacing molds, and more specifically, for replacing molds in a mold changing device in a plate processing device such as a turret punch press. This relates to mold grippers.

[Prior Art] Conventionally, as a mold gripper for mold changing of a mold changing device in a plate processing device such as a turret punch press, as shown in Japanese Patent Publication No. 54-6751, for example, a mold gripper for holding a punch and a die is used. The arm itself is elastically deformable, and the elastic deformation of the arm is used to hold the punch and die.

[Problems to be solved by the invention] In the conventional mold gripper for mold replacement mentioned above,
Since the mold is held and released many times, the arm that holds the mold remains open and cannot be held.

[Means for Solving the Problems] The present invention was made in view of the conventional problems as described above, and is a method for replacing molds of a mold changing device for replacing punches and dies in a punch press. A grip is provided with a punch holding part and a die holding part for holding the punch and the die, the bases of the fingers facing each other are pivotally connected to the finger holder, and the fingers are elastically biased in a direction toward each other. A separation actuating device is provided for acting to cause the fingers to separate from each other and to cause the fingers to separate from each other against the elastic bias.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

Referring to FIGS. 1 and 2, the plate processing apparatus mainly includes a processing apparatus main body 1 such as a turret punch press with NC, a storage shelf 3 for tool exchange that accommodates a large number of molds, etc. It consists of an automatic exchange device 5 installed between the device main body 1 and a storage shelf 3 and capable of freely loading and unloading tools.

Moreover, between the processing equipment main body 1 and the storage shelf 3,
A lifter table 9 is installed to support the tip of the work W when the work W overhangs the table 7 of the processing apparatus main body 1.

As shown in FIG. 2, a processing device main body 1 such as a turret punch press for punching the plate-shaped workpiece W includes a rotatable upper turret device 13 equipped with various types of punches 11.
A lower turret device 17 that rotates with the upper turret device 13 via an interlocking device (not shown) and is provided with a die 15 is provided.

Further, a support table 1 that supports the workpiece W is provided.
A large number of balls (not shown) are arranged on the upper surface of the workpiece W to smoothly support and move the workpiece W.

Two guide rails 21 extending parallel to the left-right direction with respect to the frame of the processing device main body 1 are attached to the front and rear side walls of the support table 19. Both ends of the carry guide 23, which extends in a direction perpendicular to the above, are movably supported.

This carry guide 23 is provided with a carriage 25 that can freely slide in a horizontal state along the longitudinal direction of this carry guide 23, and this carriage 25 has a work clamp device 27 that clamps the work W. is installed.

Therefore, after the work W is clamped by the work clamp device 27, the carry guide 23
is moved along the guide rail 21, and the carriage 25 is moved horizontally in a direction orthogonal to the moving direction of the carry guide 23. By the movement of the carriage 25, the workpiece W is moved and positioned in the front and back and left and right directions on the horizontal upper surface of the support table 19, and punching is performed by the punch 11 and die 15 attached to the processing device main body 1. .

The ball mounted on the upper surface of the support table 19 is mounted so as to be freely retractable from the upper surface of the support table 19 so as not to interfere with the carry guide 23 moving along the guide rail 21.

Next, the automatic exchange device 5 installed on the side of the lifter table 9 is a known device for loading and unloading tools between the storage shelf 3 and the processing device main body 1 as described above. use.

This automatic exchange device 5, as shown in FIG.
A C-shaped frame 31 equipped with a control device (not shown) is attached to an upright pivot shaft 29, and a pivot casing 33 that can be raised and lowered and rotated is attached to the pivot shaft 29 between the C-shaped frames 31. There is.

A tool is clamped to the rotating casing 33,
Further, a telescopic mold gripper 35 that can be unclamped is provided.

The operation of the automatic exchange device 5 is related to the operations of the above-mentioned upper turret device 13, lower turret device 17, etc., and the operation thereof is controlled by a control device (not shown).

As is clear from FIGS. 3 and 4, the mold gripper 35 has two fingers 37A and 37.
B attaches pins 41A and 41B to finger holder 39.
It is mounted so that it can rotate freely around the center. A punch holding portion 37P of the punch 11, a stripper plate holding portion 37S of the stripper plate 43, and a die holding portion 37D of the die 15 are formed on each of the fingers 37A, 37B. The punch holder 37P and the die holder 37D are provided with precautions to prevent the punch 11 and die 15 from falling during replacement.
A protrusion 45 that engages with a not-illustrated recess formed in the punch 11 and the die 15 is provided.

As shown in FIGS. 3, 4 and 5, a spring 49 is inserted between recesses 47A and 47B formed at the bottoms of both fingers 37A and 37B, and a pin 51A attached to both fingers 37A and 37B,
It spans 51B. That is, the spring 49 is connected to the pins 51A, 51B in a biased state so that the fingers 37A, 37B firmly grip the punch 11 and the die 15 and approach each other around the pins 41A, 41B. There is.

In other words, both fingers 37A, 37
B indicates the mutual punch holding portion 37P and die holding portion 37.
The punch 11 and the die 15 are elastically biased by the spring 49 in a direction toward each other so as to hold the punch 11 and the die 15 under pressure.

In order to release the punch 11 and die 15 held by the fingers 37A, 37B, the fingers 37A, 37B are moved against the biasing force of the spring 49.
A separation actuation device is provided for separating the parts 37B from each other. That is, as is clear from FIGS. 3 and 5, a cylinder 55 is provided on the finger holder 39 with a spacer 53 in between. In this embodiment, this cylinder 55 constitutes the separation actuating device, and the piston rod 57 of this cylinder 55 extends downward, and the tip 57T of the piston rod 57 is formed into a tapered shape. be. Moreover, the tapered surface of the tip 57T of the piston rod 57 is
It is formed over A and 37B. Note that a guide member 59 for guiding the piston rod 57 is provided inside the finger holder 39. Inside the cylinder 55 is a spring 61.
is interposed.

With the above configuration, when replacing the punch 11 and die 15, the punch 11 and die 15 for the next process can be taken to the storage shelf 3, or the used punch 11 and die 15 can be taken from the upper turret device 13 and the lower turret. When the mold gripper 35 approaches the device 17 and the fingers 37A, 37B contact the punch 11 and die 15, both fingers 37A, 37B rotate around the pins 41A, 41B against the spring 49 and open. . When the protrusions 45 attached to the punch holding portion 37P and die holding portion 37D of both fingers 37A and 37B engage with the recessed portions of punch 11 and die 15, both fingers 37A and 37B move toward each other due to the action of spring 49. The punch 11 and die 15 are clamped.
Next, when setting the punch 11 and die 15 for the next process in the upper turret device 13 and lower turret device 17, or when returning the used punch 11 and die 15 to the storage shelf 3, the cylinder 55 is operated. , the piston rod 57 descends. When the piston rod 55 descends, the fingers 37A, 37B rotate about the pins 41A, 41B in the direction of opening each other against the spring 49, and the punch 11 and die 15 are opened. Therefore, the punch 11 and die 15 are attached to and removed from the upper turret device 13, lower turret device 17, or storage shelf 3, and the punch and die of the mold are replaced.

[Effects] As can be understood from the above description of the embodiments, the present invention can be used as a mold grip for mold exchange of a mold exchange device that exchanges the punch 11 and die 15 in a punch press. , a punch holding part 37P and a die holding part 37D that hold the punch 11 and the die 15 are provided, and the bases of the fingers 37A and 37B facing each other are pivotally connected to the finger holder 39, and the fingers 3
7A and 37B are provided so as to be elastically biased in a direction toward each other, and act to cause the fingers 37A and 37B to separate from each other, resisting the elastic bias and separate the fingers 37A and 37B from each other. A separation actuating device 55 is provided for this purpose.

Therefore, according to the present invention, the fingers 37A and 37B of the mold gripper for mold replacement can securely hold the punch 11 and the die 5, and
This allows the punch 11 and die 15 to be reliably released. Also, punch 11, die 15
By repeating the holding many times, the punch 11,
When the biasing force holding the die 15 decreases,
By replacing, for example, a spring for elastically biasing each finger 37A, 37B, the biasing force can be easily restored.

Note that the present invention is not limited to the above-described embodiments, but can be implemented in other embodiments by making appropriate changes.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a plate processing apparatus equipped with an automatic mold exchange device. FIG. 2 is a front view of only the plate processing apparatus. FIG. 3 is a side view of the mold gripper for mold replacement according to the present invention. FIG. 4 is a sectional view taken along the - line in FIG. 3. Figure 5 is the 4th
It is a sectional view along the - line in the figure. Explanation of the symbols representing the main parts of the drawings: 1...Processing device main body, 3...Storage shelf, 5...Mold automatic exchange device, 11...Punch, 15...Die, 35...Mold gripper, 37A , 37B...finger, 37
P... Punch holding part, 37S... Stripper plate holding part, 37D... Die holding part, 41, 41
B...Pin, 45...Protrusion, 49...Spring, 55...Cylinder, 57...Piston rod.

Claims (1)

[Scope of utility model registration request] Punch 11 and die 1 for punch press
The mold grip for mold exchange of a mold exchange apparatus for performing mold exchange of 5 is provided with a punch holding part 37P and a die holding part 37D for holding the punch 11 and the die 15, and fingers 37 facing each other.
The bases of the fingers 37A and 37B are pivotally attached to the finger holder 39, and the fingers 37A and 37B are elastically biased toward each other, and the elastic force acts to force the fingers 37A and 37B to move away from each other. Each of the fingers 37A, 3 resists the bias.
Separation actuation device 55 for separating 7B from each other
A mold gripper for mold replacement, characterized by being provided with.