JP2000246373A - Die exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent falling of an operator, and secure wide operation space. SOLUTION: Floor carriages 18 equipped with elevatable floor plates 17 are linked with both ends of a transfer carriage 5 having stages 6, on which two die holders 13 are put. The floor carriages 18 moves along a rail 4 together with the transfer carriage 5, and either stage 6 is positioned on a front face of a press machine 1. In this case, one floor carriage 18 whose floor plate 17 descends, is submerged below an operation floor 2, and the ascending floor plate 17 of the other floor carriage 18 covers an opening part of a pit 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for exchanging a press machine with a die set in a die holder.

[0002]

2. Description of the Related Art Conventionally, a mold changing apparatus as shown in FIG. 3 has been used in order to increase the efficiency of a pressing operation.
In this mold exchanging apparatus, a pit 3 is provided on a work floor 2 facing the front of a press machine 1, and a rail 4 extending in the left-right direction is laid on a bottom surface thereof. Provided.

The carrier 5 has two stages 6, 6. An intermediate platform 7 provided between the press 1 and the pit 3 and each stage 6 of the carrier 5 have a guide rail 8 and a chain groove 9. Are formed. A chain 11 having a hook 10 at one end is removably inserted into the chain groove 9, and the other end of the chain 11 is connected to an electric motor 12 located behind the pit 3.

When the die used in the press machine 1 is exchanged by the above-mentioned apparatus, the die holder 13 in which the die to be used next is set is previously mounted on one stage 6 of the carrier 5. Then, the hook 10 is engaged with the die holder 13 on which the used mold is set, and the chain 11 is taken up by the drive of the electric motor 12, and the die holder 13 is pulled from the press machine 1 to the other stage 6 of the carrier 5. . Thereafter, the engagement between the hook 10 and the die holder 13 is released, and the chain 11 is further taken up and pulled out of the chain groove 9 of the carrier 5 to retract the hook 10.

Then, one stage 6 is positioned in front of the press 1 with the movement of the carrier 5, the hook 10 is engaged with a die holder 13 on the stage 6, and the chain 11 is extended by driving the electric motor 12. The die holder 13 is sent to the press 1. And press machine 1
In order to prepare for the pressing operation, the hook 10 is disengaged from the die holder 13 and the chain 11 is wound up.
Evacuation. In addition to the pressing work, the die of the die holder 13 taken out to the other stage 6 is exchanged or repaired.

[0006] By repeating such an operation while reciprocating the carrier 5, the mold can be quickly replaced and the press operation can be continued.

[0007]

However, in the above-described mold exchanging apparatus, the stages 6, 6 of the transport carriage 5 are provided.
When one of them is positioned in front of the press machine 1, one end of the pit 3 is in an open state, and if left as it is, there is a danger of the worker falling down.
Since the movement of the forklift is restricted, a blind lid must be placed on this opening. The blind lid has to be removed every time the transport carriage 5 moves and must be set again after the movement is completed, which makes the operation extremely troublesome.

In view of the above, the present invention provides a mold exchanging apparatus in which a carrier truck moves in a pit, which can easily prevent a worker from falling into the pit and secure a work space around the press machine. The task is to

[0009]

In order to solve the above-mentioned problems, the present invention relates to a method in which floor carriages having a floor plate which can be moved up and down are connected to both ends of a carriage of a die holder, and these floor carriages are moved along rails. When one of the stages is positioned in front of the press machine, one of the floor trolleys whose floor plate has descended falls under the work floor,
The pit opening was covered by the raised floorboard of the other floor cart.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Note that the same reference numerals are given to the portions denoted by reference numerals in the conventional example shown in FIG.

In this mold exchanging device, both ends of the pit 3 extend below the work floor 2, and a rail 4 is laid to the bottom surface.

The carriage 5 has a wheel 15 provided at the lower portion of the frame 14 and a motor 16 mounted on the frame 14.
The carriage 1 travels on the rail 4 and is provided at both ends of the carrier 5 with a floor board 17 that can be raised and lowered.
8 and 18 are connected via a connector 19. Each floor carriage 18 has wheels 21 at the lower part of the frame 20, and moves along the rail 4 with the carriage 5.

In each floor carriage 18, a frame 20 is provided with an elevating cylinder 22. The floor plate 17 is suspended from the lower surface thereof by four guide rods 23 inserted into the frame 20 while being guided by the cylinder 22. Ascends and descends with the drive of. Further, by moving the pins 24 provided on the frame 20 forward and backward by the cylinder 25, the floor plate 17 at the raised position is moved.
Is switched between a state in which the floor plate 17 is prevented from descending and a state in which the floor plate 17 is allowed to move up and down.

In the above-described mold exchanging apparatus, when one stage 6 is positioned in front of the press machine 1, the floor board 17 is lowered and the other one
8 goes under the work floor 2, and the floor plate 17 of the other floor carriage 18 rises to cover the opening of the pit 3. At this time, the levels of the floor plate 17 and the upper surface of the work floor 2 match.

At the time of mold replacement, the floor plate 17 of the other floor carriage 18 is lowered to move the transportation carriage 5 and the floor carriage 1.
8 and 18 are moved, the other stage 6 is positioned in front of the press machine 1, and the floor plate 17 of one floor carriage 18 is raised until the level of the work floor 2 and the upper surface coincide with each other.

As described above, since the opening of the pit 3 is covered with the floor plate 17 in the above-mentioned mold changing apparatus, there is no danger that an operator falls into the pit 3 and movement of a forklift or the like is restricted. It will not be done.

In the above example, the floor plate 17 is raised and lowered by driving the cylinder 22 while being guided by the four guide rods 23. However, the floor plate 17 may be raised and lowered by opening and closing the crossed links. Good.

[0018]

As described above, in the mold exchanging apparatus according to the present invention, a floor carriage having a floor board which moves up and down at both ends of the die holder conveyance carriage is connected, and the opening of the pit is covered with the raised floor board. As a result, it is possible to prevent a worker from falling into the pit without setting a blind lid, and to secure a wide working space.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a mold changing apparatus according to the present invention.

FIG. 2 is a vertical sectional front view of the above.

FIG. 3 is a schematic perspective view of a conventional mold changing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press machine 2 Working floor 3 Pit 4 Rail 5 Conveyor truck 6 Stage 13 Die holder 17 Floor plate 18 Floor truck

Claims (1)

[Claims] A pit (3) is provided on a work floor (2) in the vicinity of a press machine (1), and a rail (4) extending in the left-right direction is laid on the bottom surface of the pit (3). A die holder 13 in which a mold to be used next is set is placed on one stage 6, and the die holder 13 in which a used mold is set is transferred from the press machine 1 to the other. In a mold exchanging device which takes up the stage 6 and positions the one stage 6 in front of the press 1 with the movement of the carrier 5, and sends the die holder 13 on the stage 6 to the press 1, both ends of the carrier 5 are provided. Are connected to floor carts 18 and 18 having a floor plate 17 which can be raised and lowered.
Can be moved together with the transport carriage 5 along the rail 4, and when one of the stages 6 is positioned in front of the press machine 1, one floor carriage 1 with the floor plate 17 lowered
A mold changing device characterized in that an opening of the pit is covered with a floor plate of the other floor carriage.