JPH0716672A - Device for exchanging lower die in press device - Google Patents

Abstract

PURPOSE:To extremely rapidly exchange lower dies in a small space, to save handling time for exchanging lower dies and to contribute to improve production efficiency of pressed products by immediately starting necessary exchanging of lower dies stocked in plural number to be exchanged on a lower die stock elevator provided on the rear side of press device. CONSTITUTION:The lower die stock elevator 2 is provided on the rear side of press device 1, plural vertical moving tables 3 on which lower dies to be exchanged are mounted are provided on the elevator 2, a driving means by which each table 3 is stopped at the level at which lower dies are exchanged is provided and a lower die transfer means 13 by which the tables 3 are connected to a bolster 12 is provided between the lower die setting bolster 12 on the front side of press device and the elevator 2 on the rear side of press device. Further, a lower die charging means 17 by which the lower die 4 is pushed out on the bolster 12 from a parking station for dies S formed at the taking-out end of transfer means 13 and the lower die is pulled out to the parking stations from the bolster 12 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower die exchanging device for a press machine.

[0002]

2. Description of the Related Art Conventionally, generally, a trolley is passed through the front part of a press machine and a trolley is horizontally mounted to take out a lower die from the boss luter onto the trolley. Take out the required lower mold from the elevator platform of the elevator onto another trolley, carry the trolley to the place where the press equipment is installed, and place it sideways on the front of the press equipment. Insert the lower die from the trolley top onto the bolster. The method of putting in is adopted.

[0003]

However, as seen in the above representative example, generally, this type of lower die exchanging apparatus requires much time for exchanging the lower die, which is one of the causes of deterioration of productivity. It was

Further, in the above-mentioned conventional example, the complicated work of taking out and inserting the lower mold by manipulating the two movable carts for taking out and inserting the lower mold is required, which is a burden on the worker.

As a means for improving this, there is provided an exchanging device in which a plurality of lower molds are mounted on the rear part of the press machine, a conveyor for endless circulation on a plane is provided, and the necessary lower molds are taken out from the conveyor to the press machine. However, there is a problem in that a large conveyor installation space is occupied on the rear side of the press machine and it takes time and effort to move the lower mold into and out of the press machine from the conveyor.

[0006]

As a means for solving the above-mentioned problems, the present invention installs a lower stock elevator having a plurality of lifts equipped with auxiliary lower dies on the rear side of a press machine, A configuration is adopted in which each elevator is moved up and down to a lower mold exchanging level by driving means and stopped, and further, lower die transfer means is provided between the lower die installation bolster on the front side of the press machine and the elevator, and the transfer means The lower die exchanging device in a press device is provided with a lower die insertion means for pushing a lower die onto the bolster from a station for stationing formed at the carry-out end and for pulling it out from the bolster to the station.

[0007]

In the above lower die exchanging device, a plurality of lower dies to be exchanged on the rear side of the lower die stock elevator installed on the rear side of the press machine are stocked in upper and lower multi-stages on each lifting platform. The lower mold can be immediately replaced. That is, at the time of lower die replacement, the elevator is raised and lowered to stop the empty elevator at the lower die exchange level, and then the lower die on the bolster is moved from the bolster to the parking station at the end of the transfer means by the lower die insertion means. Then, the lower die pulled out to the parking station by driving the transfer means is placed on the empty lift table. Next, the elevating table for raising and lowering the elevating table to support the lower mold to be exchanged is brought to an exchange level, and the lower die is transferred from the elevating table to the parking station just before the bolster by driving the transfer means. Then, the lower die parked at this parking station is pushed onto the bolster by the inserting means, and the lower die exchange is completed.

According to this lower die exchanging device, the lower die can be exchanged very quickly in a small space.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS.

In FIGS. 1 to 4, reference numeral 1 denotes a pressing device, the side on which the lower mold of the pressing device 1 is installed is called the front side, the opposite side is called the rear side, and a plurality of parts are arranged on the rear side. Lower die stock elevator with lower die 2
Set up. This elevator 2 is equipped with elevators 3 installed in upper and lower stages, and a lower die 4 used for exchange is mounted on each elevator.

Each lifting table 3 is supported at its four corners by a vertical frame 5 assembled in a box, and a motor 8 is installed on a pedestal 7 at the upper end of a column 6 standing upright on the outside of each vertical frame 5. The screw shaft 9 provided vertically by the motor 8 is rotated, and the vertical frame 5 is moved up and down by the rotation of the screw shaft 9 so that the entire lifting platform 3 is lifted up and down together. That is, a female screw member 10 that is screwed onto the screw shaft 9 is provided at the center of a horizontal frame that connects the upper ends of the vertical frames 5, and the female screw member 10 is moved up and down according to the rotating direction of the screw shaft 9, The lifting platform 3 is lifted up and down together with the vertical frame 5.

As shown in FIG. 2, a guide roller 11 attached to the vertical frame 5 is provided on the support column 6 so that the lift table 3 can be raised and lowered stably.

Lower die transfer means for connecting the lift table 3 and the lower die installation bolster 12 on the front side between the lower die installation bolster 12 on the front side of the pressing device 1 and the lower die stock elevator 2 on the rear side. 13 is provided. As the transfer means 13, a drive roller 14 that receives the lower surface of the lower mold 4 and gives a transfer force can be provided, and a free rotating roller that guides both side surfaces of the lower mold 4 received by the drive roller 14 can be provided.

As the drive roller 14, a known motor built-in type roller is used, or as shown in the figure, an endless chain 16 driven by a motor is wound around a group of rollers 14 to drive the group of rollers 14.

The transfer means 13 stops the carry-out of the lower mold 4 taken out from one of the groups of the elevators 3 to the carry-out end of the transfer means, that is, the parking station S formed adjacent to the lower mold setting bolster 12. To do.

Further, the lower die exchanging device is provided with the transferring means 13
The lower mold 4 is pushed out from the parking station S formed at the carry-out end of the lower mold 4 onto the bolster 12 and is pulled out from the lower mold setting bolster 12 to the parking station S. For example, a hydraulic or pneumatic cylinder 18 is used. In detail,
The driving rollers 14 are arranged in parallel so as to support both side edges of the lower surface of the lower die 4, and a cylinder 18 serving as the inserting means 17 is arranged in a space between both rows, and the cylinder 18 extends in the lower die transfer direction. A joint for connecting with the lower die 4 is provided at the end of the cylinder rod 19 so that the cylinder rod 19
The lower mold 4 connected through the above joint by the expansion and contraction of is pulled out from the top of the bolster 12 to the parking station S,
On the contrary, the station S is pushed out onto the bolster 12.

As the joint means, a lock pin 21 which is moved up and down by a small cylinder 20 is provided at the tip of the cylinder rod 19, and a joint 22 is provided on the side surface of the lower die 4 on the transfer means side. By inserting the lock pin 21 into the connecting hole 23, the lower mold 4 and the inserting means 17 are detachably connected.

As described above, the lower die stock elevator 2 installed on the rear side of the press machine 1 stocks a plurality of lower dies 4 to be exchanged on the rear side on the elevator bases 3 in a vertically stacked manner. Placed. When exchanging the lower mold, the elevating table 3 is moved up and down to stop the empty elevating table at the lower mold exchanging level, that is, the empty elevating table 3 is stopped so as to be at substantially the same level as the lower die supporting surface of the transfer means 13. Then, as shown in FIG. 2 and FIG. 7, the inserting cylinder 18 as the inserting means 17 is extended to engage the lock pin 21 with the connecting hole 23 of the joint 22 provided in the lower die 4 on the bolster 12, and the inserting means. 1
7, the lower mold 4 is connected, and after the connection, as shown in FIG. 3, the cylinder 18 which is the lower mold insertion means 17 is contracted to move the lower mold 4 from the bolster 12 to the parking station S at the end of the transfer means. Withdraw.

Next, as shown in FIG. 4, the lower mold 4 pulled out to the parking station S by driving the transfer means 13 is put on the empty lift table 3. Next, the elevating table for raising and lowering the elevating table 3 and supporting the lower die 4 to be exchanged is brought to an exchange level, and the lower die 4 is driven in reverse by the transfer means 13 to move the elevating table 3 from the elevating table 3 to the bolster 12. The lower mold 4 transferred to the immediately preceding parking station S is pushed onto the bolster 12 by the lower mold 4 parked at the parking station S, and the lower mold exchange is completed.

As a means for easily putting the lower mold 4 in and out of the bolster 12, the lower mold 4 can be used when the lower mold 4 is taken in and out.
Is provided with a lifter 24 that pushes up from above the lower die bolster 12, and a guide roller 25 that supports the lower surface of the lower die 4 and guides its movement is provided on the lifter 24. The lifter 24 moves up and down, for example, by a cylinder 26, and descends and stands by when the lower die 4 is attached to the bolster 12.

Further, the elevating table 3 is provided with a driving roller 27 which is continuous with the driving roller 14 which is the transferring means 13, and the driving roller 27 is driven to move the elevating table 3 to the transferring means 13.
The lower mold 4 can be smoothly carried out upward, and conversely, can be smoothly carried in from the transfer means 13 onto the lift table 3. The drive roller 27 is a roller with a built-in motor or is driven by a chain or the like. Further, the lift table 3 is provided with a freely rotating roller 15 for guiding both side surfaces of the lower mold 4.

Further, a stopper 28 is provided on the lifting table 3 to abut against the lower mold 4 put on the lifting table 3 to prevent movement thereof.
Then, a lock means 29 for holding the lower mold 4 placed on the lifting table 3 on the lifting table 3 is provided. The stopper 28
For example, as shown in FIGS. 5 and 6, the frame frame forming the lifting table 3 is provided rotatably upward and downward, and the upper rotation position is the contact position with the lower die 4, and the lower rotation position is To the contact release position. Further, the locking means 29 has a small cylinder 30 attached to a frame and a lock pin 31 which is vertically moved by expansion and contraction of a rod of the cylinder 30 as in the joint provided in the insertion cylinder 18, as shown in FIG.
As shown in FIG. 4, the lock pin 31 is lifted to engage with the connecting hole 23 provided in the joint 22 of the lower die 4 which is stopped by contacting the stopper 28, and the lower die 4 is held on the lift table 3. . When replacing the lower mold, the lock pin 31 is removed from the joint 22 to release the connection.

Further, as shown in FIG. 1, a shelf 32 is provided on the side surface of the elevator 2 opposite to the transfer means 13, and the shelf 32 is provided.
A free-rotating roller 33 is provided on the upper side, and another lower mold is put into the shelf 32 by a trolley if necessary, and is put into the elevator 3 of the elevator 2 from the shelf 32.
On the contrary, the lower die 4 is taken out from the lifting platform 3 onto the shelf 32 and carried by a cart.

[0024]

According to the present invention, a plurality of lower molds to be exchanged on the rear side of the lower mold stock elevator installed on the rear side of the press machine are stocked on each lift table in upper and lower stages. The lower mold can be immediately replaced when needed. That is, at the time of lower die replacement, the elevator is raised and lowered to stop the empty elevator at the lower die exchange level, and then the lower die on the bolster is moved from the bolster to the parking station at the end of the transfer means by the lower die insertion means. Can be pulled out to the empty lift table by driving the transfer means. Further, the elevator is moved up and down to bring the elevator which supports the lower die to be exchanged to the exchange level, and the lower die is transferred from the elevator to the parking station immediately before the bolster by driving the transfer means, This can be pushed out onto the bolster by the inserting means, and with this lower die exchanging device, the lower die can be exchanged extremely quickly in a small space, and the lower die exchanging work can be remarkably reduced. Will contribute to the improvement of production efficiency.

[Brief description of drawings]

FIG. 1 is a side view schematically showing an embodiment of a lower mold exchanging device according to the present invention.

FIG. 2 is a plan view for explaining a lower die insertion / removal operation in the exchange device.

FIG. 3 is a plan view for explaining a lower die insertion / removal operation in the exchange device.

FIG. 4 is a plan view for explaining a lower die insertion / removal operation in the exchange device.

FIG. 5 is a perspective view of a main part of a lift table.

FIG. 6 is a front view of a joint and a stopper.

FIG. 7 is a certificate view showing a connected state of a joint and a lower mold.

[Explanation of symbols]

 1 Pressing Device 2 Lower Die Stock Elevator 3 Lifting Table 4 Lower Die 12 Lower Die Installation Bolster 17 Lower Die Inserting Means 21 Lock Pin 24 Lifter 27 Drive Roller 28 Stopper 31 Lock Pin

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[Procedure amendment]

[Submission date] August 20, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

Further, as shown in FIG. 1, a shelf 32 is provided on the side surface of the elevator 2 opposite to the transfer means 13, and the shelf 32 is provided.
A free-rotating roller 33 is provided on the upper side, and another lower mold is put into the shelf 32 by a trolley if necessary, and is put into the elevator 3 of the elevator 2 from the shelf 32.
On the contrary, the lower die 4 is taken out from the lifting platform 3 onto the shelf 32 and carried by a cart. In addition, the lower mold and the upper mold are paired
Since it is used, the present invention pairs the lower mold and the upper mold.
Of course, it is used in the case of exchanging.

Claims (3)

[Claims] 1. A lower die stock elevator installed on the rear side of a press machine, the elevator having a plurality of elevators equipped with spare lower die, and a drive means for stopping each elevator at a lower die exchange level. A lower die transfer means is provided for connecting the lower die installation bolster on the front side of the press machine and the lower die stock elevator on the rear side of the press machine, and further comprises a lower die transfer means for connecting the lifting platform and the lower die installation bolster. A lower mold exchanging device in a press device, comprising lower mold inserting means for extruding a lower mold onto the bolster from a station for forming a lower end formed on a carrying-out end and for drawing the lower mold from the lower mold installing bolster to the station for storing a lower mold. 2. A lifter for pushing up the lower mold from above the lower mold installation bolster when the lower mold is taken in and out, and a guide roller for the lower mold is provided in the lifter.
A lower die exchanging device in the press device described. 3. A drive roller continuous with the transfer means on the lift table, a stopper for abutting against a lower die inserted on the lift table to prevent movement, and a bottom roller inserted on the lift table. 2. The lower mold exchanging device for a press machine according to claim 1, further comprising a lock means for holding the mold on the lift table.