JP2000202547A - Die locking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a punch and a die from being caught with each other when a work is punched and jumping of the die out of a die attaching hole by floating up of the die owing to frictional resistance when the work is transported at a high speed. SOLUTION: A die D which is attached to a die attaching hole 53 is fixed to the die attaching hole 53 with a locking lever 73 which is provided with a first locking member 69 engaging with an engaging groove 67 formed in the outer peripheral surface of the die D, a second locking member 71 pressurized with a flange part 55 and engaged with the rear surface 55b of the flange part, and a lever main body 73B linking the first and second locking members 69, 71.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die lock device for preventing a die mounted in a die mounting hole of a die holder from coming off.

[0002]

2. Description of the Related Art There has been proposed a die attaching / detaching apparatus for mounting a die in a punch press into a die insertion hole and ejecting the die from the die mounting hole. Such an apparatus is, for example, as shown in FIG.
The lower die pusher 107, which is a cylinder for vertically moving the eject pin 105 provided inside the lower die 03, and the die D are sandwiched between the lower die pusher 107, are mounted in the die insertion hole 103, and
And an upper die pusher 109 for taking out a die D from the upper die.

In this apparatus, a lower die pusher 107 is provided.
As a result, the die D is mounted on the upper end surface of the eject pin 105, and the die D is mounted in the die mounting hole 103 while the die D is sandwiched between the lower die pusher 107 and the upper die pusher 109. ing.

[0004] By the way, the die D mounted in the die mounting hole 103 does not fall out of the die mounting hole 103.
The tip of the ball plunger 111 provided on the die holder 101 is pressed against a groove 113 formed on the outer peripheral surface of the die D to be locked.

[0005]

However, since the pressing by the ball plunger 111 is weak, the die D rises due to the catch between the die and the punch when the workpiece is punched or the frictional resistance when the workpiece is conveyed at a high speed. May get out of the way.

Accordingly, an object of the present invention is to provide a die lock device capable of preventing a die from being lifted up and out of a die mounting hole in order to solve the above-mentioned problems.

[0007]

According to the present invention, a die mounted on a top surface of a flange portion of an eject member and mounted in a die mounting hole is engaged with a recess formed in an outer peripheral surface of the die. The locking means including a lock member, a second lock member pressed by the flange portion and engaged with the flange portion, and an interlocking portion for interlocking the first and second lock members. Fix it.

As described above, since the die is fixed to the die mounting hole by the first lock member and the second lock member, the die and the punch are caught when the work is punched, and when the work is conveyed at a high speed. The die is lifted by the frictional resistance, and the die does not come out of the die mounting hole.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.
In the present embodiment, the present invention is applied to an automatic die changing apparatus in a punch press in which a necessary punch or die is taken out from a die stock section and set in a turret station of the punch press.

As shown in FIG. 1, the automatic die changing apparatus 5 includes a punch press 1 for performing a desired punching process on a work.
A mold stock unit 3 for stocking a mold for supplying another mold (exchange mold) to a mold composed of a punch P or a die D set in a turret station of the punch press 1; This is a device for automatically transferring necessary punches P or dies D from the die stock unit 3 to the turret station of the punch press 1.

As shown in FIG. 1, the punch press 1 mainly includes a work transfer section for moving a work to a processing position for positioning, and a punching section for performing desired punching work on the work.

The work transfer section includes a work table 11 provided in a substantially rectangular gap 9 opening at the center of a frame 7 having a frame structure,
1, a carriage 13 movable on the
Clamper 15 that is provided in
And

The carriage 13 is movable in the direction of arrow Y in FIG. 1 by a Y-axis drive motor 17 provided at the left end of the frame 7. On the other hand, the clamper 15 is movable along the carriage 13 in a direction perpendicular to the moving direction of the carriage 13 by an X-axis drive motor (not shown).

The punching section comprises a turret station for removably arranging the punch P and the die D, and a ram 19 for hitting the punch P arranged at the processing position. The turret station is located on the upper frame 21
The upper turret 23 is provided rotatably on the lower frame 25, and the lower turret 27 is provided rotatably on the lower frame 25.

The upper turret 23 has a disk shape, and a plurality of types of punches P having different shapes and dimensions are removably arranged along the circumferential direction. Lower turret 2
7 also has a disk shape, and a plurality of types of dies D having different shapes and dimensions are also removably arranged along the circumferential direction.

The ram 19 is provided on the upper frame 21 so as to be movable up and down, and the upper turret 23 and the lower turret 27 rotate to strike a punch P indexed and positioned at a processing position. As a result, a desired punching process is performed on the workpiece by the punch P being hit and the die D facing the punch P.

The mold stock unit 3 has a punch storage shelf 31 and a die storage shelf 33 which are attached to a shelf rotation shaft 29. In FIG. 1, the punch storage shelves 31 and the die storage shelves 33 are provided in one stage, but may be provided in a plurality of stages as required. The shelf rotation shaft 29 is rotatable by driving a shelf rotation servomotor 35.

The punch storage shelf 31 is formed as a disk-shaped storage shelf (storage), and is provided above the die storage shelf 33. A plurality of types of punches P are arranged on the punch storage shelf 31 so as to be detachable in the circumferential direction. Similarly, one die storage shelf 33 is formed as a disk-shaped storage shelf, and is provided below the punch storage shelf 31.

As shown in FIG. 1, the automatic die changing device 5 grasps a desired punch P or die D disposed on the die stock unit 3 and takes it out of the die stock unit 3. This is a changer device that transports and mounts the punch P or the die D to a predetermined position on the upper turret 23 or the lower turret 27 of the turret station.

The automatic die changing apparatus 5 rotates a pair of grippers 37, 37 constituting an article gripping means for gripping the punch P or the die D, and a changer arm 39 having the grippers 37, 37 attached to the tips. It comprises a gripper rotation shaft 41 and a servo motor 43 for rotating the gripper. The changer arm 39 is moved up and down by a drive mechanism (not shown).

The automatic die changing device 5 is provided with a die attaching / detaching device for detachably attaching the die D to / from a die holder. As shown in FIGS. 1 and 2, the die attaching / detaching device is provided on the lower pusher 49, which is a push-up means for vertically moving an ejectable member 47 that can be moved up and down in the die holder 45, and the changer arm 39. The upper pusher 51 is a pressing means.

As shown in FIG. 2, the die holder 45 has a die mounting hole 53 into which the die D is fitted and mounted. The die D is inserted into the die mounting hole 53, and the flange portion 55 of the eject member 47 is inserted into the die mounting hole 53.

The eject member 47 includes a disk-shaped flange portion 55 for supporting the die D and a cylindrical body portion 57. The flange portion 55 is formed as a disk having a size sufficient to be fitted into the die mounting hole 53,
The die D is placed on the upper surface 55a. The body portion 57 includes the lower turret 27 and the die holder 45.
It is slidably guided by a guide hole 61 formed in a back plate 59 interposed therebetween, and is inserted into an introduction hole 63 formed as a through hole slightly larger than the guide hole 61. A ring 65 is provided on the rear end side of the body 57 so as to contact the lower surface of the lower turret 27 and regulate the position of the top dead center of the eject member 47.

As shown in FIG. 2, the die automatic exchanging device 5 is provided with a die lock device for locking the die D so as to prevent the die D from inadvertently coming out of the die mounting hole 53 and falling out. When the die D is mounted in the die mounting hole 53, the die lock device engages with the first engaging groove 67 formed as an annular concave portion on the outer peripheral surface of the die D.
Lock member 69, a second lock member 71 pressed by the flange 55 and engaged with the lower surface 55 b of the flange 55, and the first and second lock members 6.
The die D is gripped from above and below and fixed by a lock lever 73 composed of a lever main body 73B as an interlocking part for interlocking the members 9 and 71 with each other.

The lock lever 73 is, as shown in FIG.
The lever body 73B is provided in the die holder 45 so as to be swingable about a support shaft 75 provided at a position close to the second lock member 71 of the lever body 73B. The lock lever 73 is formed as a substantially U-shaped lever having a first lock member 69 provided at an upper end of the lever body 73B and a second lock member 71 provided at a lower end of the lever body 73B. The second lock member 71 is constantly biased toward the eject member 47 by a coil spring 77 as biasing means provided on the back plate 59.

Next, the operation of attaching the die D to the die holder 45 in the automatic die changing apparatus 5 configured as described above will be described.

First, as shown in FIG. 1, the die D gripped by the pair of grippers 37, 37 attached to the changer arm 39 is moved to the die upper surface 55a of the eject member 47 as shown in FIG. Holder 4
The ejector 47 is placed on the upper surface 55a of the flange of the eject member 47 raised by the lower pusher 49 so as to slightly protrude from the upper end surface of the ejector 5.

At this time, the lock lever 73 is urged by the coil spring 77 to rotate clockwise about the support shaft 75, and the second lock member 71 is attached to the body 57 of the eject member 47. While being in contact, the first lock member 69 is not in contact with the flange portion 55.

Next, as shown in FIG. 2, the die D is sandwiched between the eject member 47 and the upper pusher 51. In this state, the die D is inserted into the die mounting hole 53 of the die holder 45.
And let me insert it. Then, the second lock member 71 of the lock lever 73 comes into contact with the lower surface 55b of the flange portion of the eject member 47, and the second lock member 71 is pressed by the flange portion 55 as the eject member 47 moves down. Accordingly, the lock lever 73 rotates counterclockwise about the support shaft 75 with the insertion of the die D.

Then, as shown in FIG. 3, when the die D is completely mounted in the die mounting hole 53, the first lock member 69 of the lock lever 73 is engaged with the engagement groove 67 of the die D,
Further, the second lock member 71 urged by the coil spring 20 is engaged with the flange lower surface 55b of the eject member 47, and the die D is fixed by the lock lever 73 to be pressed against the flange upper surface 55a. Is done.

In this manner, when the die D is mounted in the die mounting hole 53, the die D is gripped from above and below in a manner such that the die D is pressed against the upper surface 55a of the flange portion of the eject member 47 by the lock lever 73. Accordingly, it is possible to prevent the punch P and the die D from being caught in the punching of the work, and the die D from floating and jumping out of the die mounting hole 55 due to frictional resistance when the work is conveyed at a high speed.

On the other hand, to eject the die D, the eject member 47 is raised by the lower pusher 49. Then, the lower end of the lock lever 73 is
, The lock lever 73 rotates clockwise about the support shaft 75, and the first lock member 69
Is released from the engagement groove 67, and the locked state of the die D is released. That is, as shown in FIG. 2, the die D can be taken out from the die mounting hole 55.

Although the specific embodiments to which the present invention is applied have been described above, the present invention is not limited to the above-described embodiments and can be variously modified.

For example, a similar effect can be obtained by using a cam mechanism as a mechanism for moving the first lock member 69 and the second lock member 71 in conjunction with each other.

In the above-described embodiment, the coil spring 77 is used as the urging means for urging the lock lever 73. However, an elastic body such as urethane may be used.

[0036]

The present invention is embodied in the form described above and has the following effects.

According to the die lock device of the present invention, the first lock member is engaged with the concave portion formed on the outer peripheral surface of the die, and the second lock member is pressed by the flange portion and is engaged with the flange portion. The die is fixed to the die mounting hole by a locking means including an interlocking portion for interlocking the first and second locking members, so that the punch and the die can be caught when punching a work. In addition, it is possible to prevent the die from floating and jumping out of the die mounting hole due to frictional resistance when the work is conveyed at a high speed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an automatic die changing apparatus.

FIG. 2 is a sectional view showing a state before a die is mounted in a die mounting hole, and showing a state in which a lock lever is unlocked by a lock lever.

FIG. 3 is a cross-sectional view showing a state in which the die is mounted in a die mounting hole and showing a locked state of the die by a lock lever.

FIG. 4 is a sectional view showing a conventional die lock device.

[Explanation of symbols]

 45 Die holder 47 Eject member 53 Die mounting hole 55 Flange part 57 Body part 67 Engagement groove 69 First lock member 71 Second lock member 73 Lock lever 73B Lever body 75 Support shaft 77 Coil spring

Claims (2)

[Claims] 1. A die mounted on an upper surface of a flange portion of an eject member provided to be vertically movable in a die mounting hole of a die holder and mounted in the die mounting hole is formed on an outer peripheral surface of the die. Locking means including a first lock member engaged with the concave portion, a second lock member pressed by the flange portion and engaged with the flange portion, and an interlocking portion interlocking the first and second lock members. A die lock device fixed to the die mounting hole. 2. A lever having a first lock member at an upper end and a second lock member at a lower end, wherein the lock means is swingably provided in the die holder around a support shaft. And the second
2. The die lock device according to claim 1, wherein said lock member is constantly urged toward said eject member by an urging means.