JPH046455B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a moving bolster device in a transfer press, and more particularly to a moving bolster device that allows easy mold replacement of a moving bolster taken out from a press machine.

(Prior Art) Japanese Unexamined Patent Publication No. 14227/1983 introduces a device that allows a mold and a feed bar to be taken out from a press machine with a mold and a feed bar placed on a moving bolster. Referring to Figures 21 to 25 of the above publication, the feed bar can be divided into a part directly connected to a drive mechanism that performs clamp/unclamp movements and advance return movements within the unit box, and an intermediate part equipped with fingers. When replacing the mold, the feed bar is pulled out from the press machine by cutting off the middle portion and supporting it on a pedestal provided on the bolster.

In conventional technology, a crane was used to replace the mold of the moving bolster taken out of the press machine, but in recent years, full automation with the aim of creating an unmanned factory has progressed rapidly, and methods other than the crane method are now required. Ta.

For this reason, a die lifter and a die chain engine system have been developed in which the mold is replaced by rolling it on a bolster, but when this method is adopted, interference between the mold and the feed bar, which was not a problem with the crane method, becomes a problem.

(Problem to be Solved by the Invention) The problem to be solved by the present invention is to provide a cradle for the feed bar on the bolster, and provide a lifting and retracting mechanism for the feed bar on the cart on which the bolster is mounted. To provide a moving bolster device which facilitates mold replacement by preventing interference between a mold and a feed bar when replacing the mold of a moving bolster.

(Means for solving the problem) Means for solving the problem in the present invention are as follows:
A moving bolster provided movably between the press machine and the trolley, a feed bar receiver provided at each corner of the moving bolster for placing the feed bar, and a feed bar receiver for pulling out the mold from among the feed bar receivers. A column rod provided adjacent to the truck, a lift frame provided movably up and down along the column rod, and a feed bar support plate provided on the lift frame so as to be movable back and forth toward the moving bolster; The above-mentioned dolly is installed behind the transfer press so as to be movable in the left and right direction, and a mold table for exchanging molds corresponding to the dolly is provided behind the left and right ends of the dolly. It is.

(Function) When carrying out the molds 5 and 6 on the bolsters 3 and 4 to the mold tables 7 and 8 provided at the rear of the trolley 2 for mold replacement, the height is such that the molds can pass under the feed bar 23. Interference between the feed bar 23 and the molds 5 and 6 is avoided by raising the feed bar 23 by the feed bar lifting mechanism 25 so that the mold can be carried in and out horizontally.

(Example) Figures 1 and 2 show the overall configuration, and Figures 3 and 4 show the overall configuration.
The figure shows the elevating mechanism of the feed bar, and Fig. 5 shows the layout of the truck on which the press machine and the bolster are mounted.

First, in Fig. 5, transfer press 1
A cart 2 movable in the left and right direction is provided behind the
Two moving bolsters 3 and 4 are mounted on this truck 2. The illustrated cart 2 includes a bolster 3,
4 are both installed, and the said bolster 3,
The molds 5 and 6 are placed on trolley 4, and the drawing shows trolley 2.
has moved to the right edge and stopped. At this position, the bolster 4 mounted on the left side of the truck 2 faces the bed 1a of the transfer press 1, so that the bolster 4 at this position can be fed into the press.

On the other hand, the cart 2 can move to the left until the right bolster 3 faces the transfer press 1, and as shown in the figure, when the cart 2 stops at the right end, the mold 5 on the bolster 3 A mold table 7 on which the mold 6 is pulled out and placed thereon, and a mold table 8 on which the mold 6 on the bolster 4 is placed when stopped at the left end are provided.

Next, the elevating mechanism of the feed bar will be explained with reference to FIGS. 1 and 2. The trolley 2 has wheels 20 on its lower surface and is placed on rails 21 laid on the floor and is movable on the rails 21. On the other hand, the bolster 3 has wheels 22 on its lower surface and is mounted on rails 21 laid on the floor. The bolster 3 is movable in a direction perpendicular to the moving direction of the truck 2.

Since the bolsters 3 and 4 have the same structure, each member will be described with the same reference numerals hereinafter.

A feed bar holder 24 for placing a feed bar 23 is provided at each corner of the bolster 3. In the press machine, the feed bar 23 is connected to the drive part of the transfer feed, and performs clamp/unclamp motion, advance return motion, and conveys the processed material to each stage. When the bolster is pulled out from the press machine, it is separated from the driving part and mounted on the feed bar receiver 24.

The truck 2 is provided with a feed bar lifting mechanism 25 at a position corresponding to a feed bar receiver 24 provided at a corner of the bolster 3 when the bolster 3 is transported to either the left or right end. The lifting mechanism 25 has a column rod 26 and a lift frame 27 that moves up and down along the column rod 26, and the lift frame 27 is pivoted between the lower surface of the truck 2 and the top of the column rod 26. It is connected to a chain 30 attached to chain sprockets 28 and 29, and moves up and down along the column rod 26 when the chain sprocket 28 is driven.

Reference numeral 31 denotes a drive shaft of the chain sprocket 28, which is connected to a drive section of a gear box 32.

Details of the lift frame will be explained with reference to FIGS. 3 and 4. Two pillar rods 26 are installed in parallel, and each pillar rod 26 sandwiches the lift frame 27 at the front and rear, and a guide rail 26a provided on the opposing inner side is pivoted to the lift frame 27. The lift frame 27 is held between the right and left sides by the rollers 33
This ensures stable vertical movement. The lift frame 27 has a U-shaped cross section and is composed of a side plate 27a provided with the rollers 33 and a bottom plate 27b connecting the side plate 27a. A feed bar support plate 34 provided on the side plate 27a in a direction perpendicular to the length of the column rod 26 (the direction of clamping/unclamping the feed bar) is movably mounted on the side plate 27a by being sandwiched between guide rollers 35 provided on the side plate 27a. An air cylinder 36 is provided on the bottom plate 27b, and the feed bar support plate 34 and the piston rod of the air cylinder 36 are connected by a connecting plate 37.

Note that 38 is a pedestal for the feed bar provided on the feed bar support plate 34.

Next, the feed bar transfer operation will be explained. After detecting that the bolster 3 has moved to the right end together with the truck 2, the lift frame 27 moves down along the column rod 26 with the feed bar support plate 34 retracted (to the right end in FIGS. 3 and 4), and moves the feed bar support plate 34 to the right end. 2
4 (the lift frame is at the position indicated by the chain line in FIG. 1).
Next, the feed bar support plate 34 is advanced by the air cylinder 36, and the lift frame 27 is raised in that state. By doing this, the feed bar 23 on the feed bar receiver 24 is transferred onto the feed bar support plate 34, and then, when the lift frame 27 rises slightly, the feed bar support plate 34 is retreated, and the lift frame 27 is raised again. The feed bar 23 is positioned above the mold 5 (the lift frame is at the position indicated by the solid line in FIG. 1).

When the feed bar 23 reaches a position above the mold 5, the mold 5 is carried out through under the feed bar 23. Then, another mold is carried into the bolster 3, but at that time, the molds are exchanged by operating each part in the reverse order of the carrying-out operation described above.

(Effects of the Invention) The present invention is capable of temporarily retracting the feed bar that pulls out the mold out of the feed bars placed on the bolster above the mold using a feed bar lifting mechanism provided on a trolley. Therefore, after the feed bar is retracted, it becomes possible to pull out the mold on the bolster in the horizontal direction, and therefore, the mold can be exchanged efficiently.

[Brief explanation of drawings]

Fig. 1 is a side view showing the main parts of the whole assembly, including a part of the truck and the bolster, Fig. 2 is a plan view of the same, Fig. 3 is a plan view showing details of the feed bar lifting mechanism, Fig. 4 is the same side view. Fifth
The figure is a plan view showing the layout of a press machine, a cart, and a mold table for exchanging molds. 1... Press, 2... Cart, 3, 4... Bolster, 5, 6... Mold, 7, 8... Mold table,
20...Wheel, 21...Rail, 22...Wheel,
23... Feed bar, 24... Feed bar holder, 25... Lifting mechanism, 26... Pillar rod, 26a...
...Guide rail, 27...Lift frame, 27a...
Side plate, 27b... bottom plate, 33... roller, 34...
Feed bar support plate, 35... Guide roller, 3
6... Air cylinder, 37... Connection plate, 38...
cradle.

Claims (1)

[Claims] 1. A moving bolster provided movably between the press machine and the trolley, a feed bar receiver provided at each corner of the moving bolster for placing the feed bar, and a feed bar receiver for pulling out the mold from among the feed bar receivers. A column rod provided on the cart adjacent to the column rod, a lift frame provided so as to be movable up and down along the column rod, and a feed bar support plate provided on the lift frame so as to be movable back and forth toward the moving bolster. The above-mentioned cart is installed behind the transfer press so as to be movable in the left and right direction, and a mold table for exchanging molds corresponding to the cart is provided behind the left and right ends of the cart. Moving bolster device.