JPH032345Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a device that thrusts a press-formed product that has been press-worked into a predetermined posture above a lower die in order to take it out of the press die.

Conventional technology When a press-formed product that has undergone press processing such as trimming is taken out from the press mold by being gripped with a geo-yoke clamp, the gripping operation cannot be performed if the peripheral portion of the press-formed product to be gripped with the geo-yoke clamp is in close contact with the lower die. In addition, since the jaw clamp is installed at a certain level higher than the lower die to avoid interference with peripheral equipment, it is necessary to push the press-formed product up from the lower die after processing. FIGS. 4 and 5 are cross-sectional views showing a lifting device conventionally used for such a purpose. 2 is configured to lift the entire press-formed product W. That is, the post 1 is inserted into a hollow part 4 provided on the side of the lower mold 3 so as to be able to move up and down, and an arm is attached to the lower end of the post 1 and rotated by an actuator (not shown) such as an air cylinder. The distal end of the arm 5 is rotatably engaged with the arm 5, so that the post 1 can be moved up and down by the rotation of the arm 5. Also swing bar 2
has an upper surface shaped to follow the lower surface of the press-formed product W, and magnets 6 for attracting the press-formed product W are embedded in two predetermined locations on the upper surface side. Further, a stopper arm 7 is formed at one end of the swing bar 2, and a stopper 8 for engaging the stopper arm 7 from below is provided on the lower die 3, and the stopper arm 7 is provided on the opposite side to the stopper arm 7. There is a tension spring 1 between the end of the
0 is placed. The swing bar 2 configured as described above is rotatably attached to the upper end of the post 1 via a pin 11 at its intermediate portion. The upper end of the post 1 is a so-called clevis joint, and about the right half of its bottom surface in the figure is designed to engage the swing bar 2 to restrict rotation beyond a certain level in the clockwise direction in the figure. It's getting old.

Therefore, in the above conventional device, when the post 1 is at its lower limit as shown in FIG. 4, the swing bar 2 is rotated to the limit position by the tension spring 10, and as a result, the swing The upper surface of the bar 2 follows the lower surface of the press-formed product W on the lower mold 3, and the magnet 6 attracts the press-formed product W. After pressing, when the post 1 is raised by the arm 5, the swing bar 2 is raised together with the post 1 while stretching the tension spring 10. In that case, since the swing bar 2 is restricted from rotating clockwise in the figure, it rises while maintaining its posture at the lower limit position. When the swing bar 2 rises to a certain extent in this way, the stopper arm 7 formed at one end thereof engages with the stopper 8, and as a result, the engagement part becomes the fulcrum and the pin 1
The swing bar 2 rotates as shown in FIG. 5 with the attachment point 1 serving as the point of effort, and as a result, the right end of the press-formed product W in the figure reaches a position corresponding to the jaw clamp (not shown). do.

Problems to be Solved by the Invention However, in the conventional device described above, the stopper arm 7 is formed at one end of the swing bar 2, and the stopper arm 7 is formed at the other end sandwiching the pivot part at the lower limit position. Since the structure is such that a tension spring 10 is attached to maintain the posture, the swing bar 2 is attached to the post 1.
The target press-formed product W requires a certain length or more on the left and right sides of the center.
If the lower mold 3 itself is small because of the small size, the lower mold 3 cannot be incorporated into the lower mold 3 and cannot be used. Furthermore, as shown in FIGS. 4 and 5, even when shearing is performed, the press-formed product W
Since the swing bar 2 is in opposing contact with the lower surface of the middle part which is not directly used for processing, the swing bar 2 gets in the way and it is not possible to process the middle part, so that the hole punching process is performed at the same time as shearing. Such,
There is a problem that compound processing becomes impossible. Furthermore, in the conventional device described above, the stopper arm 7 engages with the stopper 8 after the swing bar 2 has risen to a certain extent, but if the lift-up speed is increased to shorten the cycle time, the stopper arm 7 The engagement shock with the stopper 8 becomes large, and even if it is attracted by the magnet 6, there is a great possibility that the press molded product W will move and its relative position with the jaw clamp will be twisted. Furthermore, since the tension spring 10 needs to extend as the swing bar 2 rises and rotates, the amount of rise and the rotation angle of the swing bar 2 depend on the shape of the press-formed product W, the structure of the press mold, etc. If it is necessary to increase the above-mentioned structure, it may not be possible to adopt the above-mentioned structure because there is no tension spring with an appropriate elongation amount. Furthermore, since the post 1 must rise against the elastic force of the tension spring 10, there is a problem in that the output of the actuator for raising the post 1 must be increased.

This invention was made in view of the above-mentioned circumstances, and the object thereof is to provide a press-formed product push-up device that is simple and compact in structure.

Means for Solving the Problems In order to achieve the above-mentioned purpose, this invention has a post that pushes up the press-formed product on the lower mold in a certain direction away from its center of gravity, and moves up and down toward the lower mold. A block, which is freely arranged and has a magnet attached to the upper surface side that attracts the press-formed product, is attached to the upper end of the post at a position away from the center of gravity so that it can rotate under its own weight in the same direction as the tilting of the press-formed product. A support member is provided which is rotatably attached and which supports the block so that the upper surface of the magnet follows the press-formed product on the lower mold by restricting the rotation of the block due to its own weight at the lower limit position of the post. It is characterized by:

Therefore, in the device of this invention, if the post is lowered to the lower limit, the block to which the magnet is attached will be supported by the support member, and its upper surface will be in a posture that mimics the press-formed product, and it will be placed on the lower mold. The magnet attracts the press-formed product placed there. When the post is raised after press working, the block directly pushes up the press-formed product, but since the position of the post, that is, the push-up position, is off in a certain direction from the center of gravity of the press-formed product, the press-formed product is pushed up from one end. Rotate so that only the front side is lifted. Furthermore, since the block is attached to the post so that it can rotate under its own weight in the same direction as the tilting of the press-formed product, the press-formed product and the block can rotate as one without being attracted by the magnet. . That is, in the device of this invention, the weight of the press-formed product and the weight of the block are used to rotate and tilt the press-formed product, and as a result, one end of the press-formed product is raised to a position where it can be clamped.

Embodiment Hereinafter, one embodiment of this invention will be described in Figures 1 to 3.
This will be explained with reference to the figures. In the embodiments described below, parts having the same configuration as the conventional device shown in FIGS. 4 and 5 are shown in FIGS. 1 to 3.
The same reference numerals as those mentioned above are given to the figures, and the explanation thereof will be omitted.

Post 1 is a press-formed product W installed on lower mold 3
A block 12 is rotatably attached to the upper end of the block 12 by a pin 13. As shown in FIGS. 1 and 2, the block 12 has an extremely small upper surface width compared to the press-formed product W, and a magnet 14 that attracts the press-formed product W is embedded in the upper surface side. At the same time, a protrusion 15 is formed toward the center of gravity of the press-formed product W. Therefore block 12
is attached to the upper end of the post 1 so that it can rotate counterclockwise in the figure due to its own weight.

Also, the protruding portion 1 of the block 12 in the lower die 3
A pin 16 as a support member that supports the protrusion 15 from below is arranged at a position corresponding to 5, and an elastic body 17 such as a spring is arranged below the pin 16. When the block 12 is at the lower limit position, the pin 16 pushes up the protrusion 15 to support the block 12 in a position where the upper surface of the block 12 follows the press-formed product W on the lower die 3.

FIG. 1 shows a state in which the post 1 is lowered to its lower limit in preparation for press working. In this state, the pin 16 is pushing up the protrusion 15 of the block 12, so the rotation of the block 12 due to its own weight is restricted. Its upper surface is held in a position that follows the press-formed product W. Therefore, the press-formed product W on the lower die 3 is attracted by the magnet 14. When the post 1 is pushed up via the arm 5 upon completion of the press work, the press molded product W rises together with the block 12. In that case, the press-formed product W is pushed up at a location away from its center of gravity, so only one end is lifted and tilted, and the block 1
2 separates from the pin 16 as it rises and rotates in the same direction as the inclination direction of the press-formed product W due to its own weight, so that the magnet 14 remains attached to the press-formed product W while adsorbing the press-formed product W. The block 12 rotates and tilts together. FIG. 3 shows a state in which the post 1 is pushed up to its upper limit, and as a result of the press-formed product W being rotated and tilted as described above, only one end is pushed up to a predetermined height.

Then, after gripping and taking out the press-formed product W using, for example, a geo-clamp (not shown), when the post 1 is lowered to its lower limit, the block 12 has its protrusion 15 pushed up by the pin 16 and moves clockwise in the figure. It rotates and is held in a position where the upper surface follows the press-formed product W on the lower mold 3.

Effects of the invention As explained above, the device of this invention pushes up the press-formed product on the lower die at a position away from its center of gravity.As a result, the press-formed product is tilted and the predetermined end is raised to the required height. The block is pushed up, and the block is attracted to the press-formed product by a magnet and rotates in the direction of inclination of the press-formed product by its own weight, so the block should be extremely small compared to the press-formed product. In addition, no special means is required for the rotation operation, and therefore the structure can be simplified, lightweight and compact, and furthermore, it can be made inexpensive and highly durable. . Furthermore, by making it possible to reduce the size of the blocks that come into contact with the press-formed product, processing at the middle part of the press-formed product will not be hindered, and complex processing such as shearing and drilling at the same time becomes possible. Furthermore, since the press-formed product and the block are rotated and tilted by their own weight, the force that resists the rise of the post does not actively act, which makes it possible to downsize the actuator for raising the post and reduce energy consumption. can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of this invention, Fig. 2 is a front view showing the block, Fig. 3 is a sectional view showing the state after operation, and Fig. 4 is a conventional method for lifting press-formed products. FIG. 5 is a sectional view showing an example of the device, and FIG. 5 is a sectional view showing the state after operation. 1...Post, 3...Lower die, 12...Block, 14...Magnet, 16...Pin, W...
Press molded product.

Claims (1)

[Scope of utility model registration request] A post that pushes up the press-formed product on the lower die in a certain direction away from its center of gravity is placed on the lower die side so that it can move up and down, and a block with a magnet attached to the top side that attracts the press-formed product. is rotatably attached to the upper end of the post at a position away from the center of gravity so that it rotates under its own weight in the same direction as the tilting of the press-formed product, and further rotates under the weight of the block at the lower limit position of the post. A device for pushing up a press-formed product, characterized in that a support member is provided to support the block so that the upper surface of the magnet follows the press-formed product on the lower die by restricting movement.