JP2595107Y2 - Transfer bar lifter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer bar lifter for temporarily retreating a transfer bar provided on a transfer feeder upward or downward during mold replacement.

[0002]

2. Description of the Related Art Conventionally, a transfer feeder mounted on a transfer press has transfer bars arranged side by side in the work transfer direction, and transfers the work using an attachment attached to the transfer bar. It is configured. Further, the transfer bar is divided into a plurality of parts in the longitudinal direction, and a part of the transfer bar divided at the time of exchanging the mold is pulled out from the press body together with the mold, so that the attachment can be exchanged by the external setup.

On the other hand, in recent years, in order to automatically change a mold,
An automatic warehouse with a large number of molds housed in the mold change station and a stacker crane for loading and unloading the molds are provided in front of the warehouse, and the molds transported by the moving bolster are automatically changed using the stacker crane. There has been proposed an automatic mold changing apparatus.

[0004]

However, in the above-described conventional automatic die changing apparatus, there is a problem that the transfer bar carried out of the press body together with the die becomes a hindrance when the die is replaced. This invention has been made to solve the above-mentioned problem, and provides a transfer bar lifter for retracting the transfer bar upward or downward so that the transfer bar does not interfere with the mold replacement, thereby enabling automatic mold replacement. The purpose is to do so.

[0005]

According to the present invention, in order to achieve the above object, in a transfer press having a moving bolster which can be freely taken in and out of a press body, at least one of the front and rear of the moving bolster is separated in the left-right direction. Te erected a pair of posts, the lift motor to these posts provided vertically movable lifting member, and in these lifting members, with the lifting of the lifting member, the guide member
Lifter that is automatically guided to the front and rear by being guided by
And a bar receiving portion for supporting the divided transfer bar from below is provided at the tip of each of the lift arms.

[0006]

[Operation] With the above configuration, the transfer bar can be automatically retracted to a position where it does not interfere with the mold replacement, so that the mold can be automatically replaced easily.

[0007]

[Embodiment] An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a transfer press, FIG. 2 is a front view thereof, and FIG. 3 is an enlarged view of a transfer bar lifter. In these figures, reference numeral 1 denotes a press body, which has a moving bolster 2 which can be freely taken in and out. Reference numeral 3 denotes a slide provided in the press body 1 so as to be movable up and down. Reference numeral 4 denotes a transfer feeder having a pair of transfer bars 5 for transporting a work (not shown). The transfer bar 5 is divided into a plurality of parts, and a part of the transfer bar 5 is carried out of the press body 1 together with the moving bolster 2 so that fingers (not shown) can be exchanged in an external setup. In the drawing, reference numeral 6 denotes a rail for moving the moving bolster 2 from the inside of the press body 1 to the mold changing position A, which is laid in the front-rear direction of the press body 1 and the direction orthogonal thereto.

On the other hand, the transfer bolster 2 is provided with two transfer bar lifters 8 which also serve as a bar support for mounting a transfer bar 5 to be carried out of the press body 1 before and after the moving bolster 2. I have. The transfer bar lifter 8 has a column 9 having a lower end fixed to the moving bolster 2 as shown in FIG. The guide rails 1 are vertically attached to these columns 9.
The lifting members 11 are attached to the guide rails 10 for each column 9 so as to be able to move up and down. The elevating member 11 has a guide rail 12 in the horizontal direction, and a lift arm 13 is mounted on the guide rail 12 so as to be movable in the horizontal direction.

The tip of each of the lift arms 13 faces the center line of the moving bolster 2, and a bar receiving portion 13a is fixed to the tip. Each bar receiving portion 13
a has a substantially concave shape, and the left and right lift arms 13
The lower end supports the both ends of the transfer bar 5 from below, and a positioning pin that fits from below into a pin hole (not shown) formed in the transfer bar 5 at the center of the bar receiving portion 13a. 13b is protruded.

On the other hand, a guide member 15 for vertically moving the lift arm 13 is provided on the front side of each support 9 in the vertical direction. The guide member 15 has a guide groove 15a projecting in the shape of a chevron toward the mold 16 on the moving bolster 2 on the lower side, and a guide rotatably mounted on a side surface of the lift arm 13 in the guide groove 15a. The roller 17 is fitted. Sprockets 18 and 19 are provided at the upper and lower ends of each support 9, and a chain 20 is wound around the sprockets 18 and 19. Both ends of the chain 20 are connected to the elevating member 11 and sprockets 19 provided below the right and left columns 9.
Are linked to each other by a drive shaft 21. A lift motor (not shown) is connected to the drive shaft 21, and the lift shaft 11 is rotated by the lift motor, so that the lifting member 11 can be moved up and down via the chain 20.

Next, the operation will be described. During the operation of the press body 1, each lift arm 1 of the transfer bar lifter 8 is operated.
Numeral 3 is raised to the retracted position shown by the imaginary line in FIG. 3 so as not to interfere with the transfer bar 5 in operation. Next, the transfer bar 5 is replaced to replace the mold 16.
When the transfer is carried out from the press body 1, each lift arm 13 of the transfer bar lifter 8 is lowered by a lift motor. As a result, each lift arm 13 at the retracted position is lowered to the solid line position in FIG.
Ru is automatically projected direction. In this state, the transfer bar 5 is placed on the bar receiving portion 13a provided at the tip of the lift arm 13, and the transfer bar 5 is divided. When the division of the transfer bar 5 is completed, the moving bolster 2 is used together with the mold 16 to transfer the transfer bar 5.
Is carried out from the press body 1 and moved to the mold changing position A. When the moving bolster 2 stops at the mold changing position A, each lift arm 13 is raised by the lift motor to the retracted position shown by the phantom line in FIG. 3, and the transfer bar 5 is automatically retracted upward. With this arrangement, the moving bolster 2 can be moved without being disturbed by the transfer bar 5.
The upper mold 16 can be automatically exchanged by an automatic exchange device (not shown).

Further, the mold 16 is replaced and the transfer bar 5 is replaced.
When the replacement of the fingers (not shown) attached to the moving bolster 2 is completed, the moving bolster 2 is loaded into the press body 1 by the reverse operation of the above-described unloading, and the transfer bar 5 is connected. In the above embodiment, the transfer bar 5
Is retracted upward, but may of course be retracted downward.

[0013]

[Effect of the invention] This invention is, as described in detail above, a lift.
For raising and lowering members that are raised and lowered by a motor,
A riff that automatically moves back and forth guided by the guide member
Arm, and a transformer is attached to the tip of this lift arm.
Whether a bar receiving section that supports the fabber from below is provided
Moving the moving bolster to the mold change position
After that, just raise and lower the lifting member by the lift motor,
The transfer bar is automatically retracted to the retract position.
When the mold is automatically changed, the mold and the transfer bar
Without interference, this makes the mold change safe and
Be able to do it quickly. Also riff like the conventional one
Operation such as manually moving the arm back and forth to retract
Since it is not necessary, the mold can be changed in a short time,
As a result, the press operation rate is improved and productivity is improved.
As well as manually transferring long and heavy transfer bars.
This eliminates the need for evacuation and other tasks, so workers are
Reduced labor and no need for workers to enter the mold change position.
Therefore, the safety of workers can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a transfer press employing a transfer bar lifter according to an embodiment of the present invention.

FIG. 2 is a front view of a transfer press employing a transfer bar lifter according to an embodiment of the present invention.

FIG. 3 is an enlarged side view of a transfer bar lifter according to an embodiment of the present invention.

[Explanation of symbols]

1 ... Press body, 2 ... Moving bolster, 9 ... Prop,
11: lifting member, 13: lift arm, 13a: bar receiving portion.

Claims (1)

(57) [Scope of request for utility model registration] 1. A transfer press having a moving bolster 2 which can be freely taken in and out of a press main body 1. In a transfer press, at least one of the front and rear sides of the moving bolster 2, a pair of columns 9 are erected in the left and right direction. 9 vertically movable by the lift motor lifting member 11
Are provided, and the lifting member 11 is provided with
As it moves up and down, it is guided by the guide member 15 and
A transfer bar lifter provided with a dynamically movable lift arm 13 and a bar receiving portion 13a for supporting the divided transfer bar 5 from below at the end of each of the lift arms 13.