JPS5813247B2 - Reversing device for molded products in transfer press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for reversing a molded product in a transfer press, which uses the operation of a feeder to reverse the molded product.

Generally, in transfer presses, in which the molded product is sequentially moved to processing stations using a feeder and press processing is performed continuously in multiple steps, the molded product may be turned over during processing. I was going while doing so.

For this reason, there were drawbacks such as lack of reliability, such as inability to carry stably.

The present invention has been made for the purpose of eliminating such drawbacks, and provides a molded product reversing device for a transfer press in which the molded product to be reversed is reversed at an idle station using the operation of a feeder, and the molded product is conveyed. The aim is to stabilize the operation and increase the transport speed.

The present invention will be described in detail below with reference to an illustrated embodiment.

In the figure, 1 is a transfer press, which has a bolster 2 at the bottom and a slide 3 at the top that can be raised and lowered.

A mold (not shown) is provided on the bolster 2 for each processing station, and the molded product 5, which is gripped by the fingers 4a of the feeder 4 and conveyed sequentially, is placed between the mold (not shown) attached to the slide 3. It can be press-formed.

Reference numeral 6 designates a device of the present invention installed at an idle station, which has a pedestal 7 on which the molded product 5 is placed.

The pedestal 7 has an L-shaped arm 1 on the upper end side of a pair of elevating rods 9 supported on the bolster 2 through a bush 8 so as to be movable up and down.
0, and a stopper 9a is provided protruding from the lower end side of each lifting rod 9, and between this stopper 9a and the bottom surface of the recessed hole 2a that accommodates the lower end side of each lifting rod 9. A compression spring 11 is provided which biases each lifting rod 9 upward.

A pressing rod 12 is provided above the lifting rod 9 and located on the same axis of the lifting rod 9.

The pressing rod 12 is a guide tube 1 protruding from the bottom surface of the slide 3.
The upper end side is fitted into the guide cylinder 13, and is biased downward by a compression spring 14 housed in the guide cylinder 13.

On the other hand, above the pedestal 7, an inversion holding member 15 is provided between the respective feed bars 4.

The reversal holding member 15 has a flat plate shape with an accommodation hole 15a for accommodating the molded product 5 in the center, and shaft rods 16 are protruded from mutually opposing peripheral surfaces, and these shaft rods 16 serve as bearings. It is rotatably supported by the frame main body 6a on the bolster 2 via 17.

Also, a groove 15b penetrating vertically at the base of the shaft 16 side.
is formed, and a substantially Y-shaped swinging pawl 18 is accommodated within this groove 15b.

The center part of the swing claw 18 is inverted and held by the pin 19.
The distal end claw portions 18a of the swinging claws 18 protrude toward the upper and lower surfaces of the reversing holding member 15, and the claws located on the lower side Part 1
8a always slightly protrudes downward from the accommodation hole 15a.

That is, the proximal end 18b of the swing claw 18 is pivoted by a pin 21 at a position eccentric by a distance δ with respect to the pin 19 of the operating pin 20 fitted in the radial direction of the shaft rod 16. Rollers 22 are rotatably supported at both ends of the operating pin 20, and these rollers 22 are supported by a bearing cylinder 23.
A guide surface 23 centered on a pin 21 formed on the inner surface of the
a to hold the swing claw 18 in the inclined position shown in FIG. 1 regardless of the rotation of the inversion holding member 15.

A gear 25 is attached to the shaft 16 of the reversing holding member 15 via a one-way clutch 24, and this gear 25 is meshed with a segment gear 27 via an intermediate gear 26.

The segment gear 27 has a fan shape, and a main part is fixed to the rotation shaft 28.

The rotation shaft 28 is supported by the frame 6a via a bearing 29 below and parallel to the shaft rod 16, and has a lever 3 at the end.
The proximal end of 0 is fixed.

The lever 30 is always biased in the advance direction of the feeder 4 by a tension spring 31, and a roller 32 is supported at the tip thereof, and when the feeder 4 returns, this roller 32 pushes against a stopper protruding from the feeder 4. 3
3, the lever 30 is rotated in the return direction with the return operation of the feeder 4.

The molded product 5 that has reached above the pedestal 7 while being held by the fingers 4a of the feeder 4 is unclamped and placed on the pedestal 7 that protrudes upward from the accommodation hole 15a of the inversion holding member 15.

Next, when the slide 3 descends, the lifting rod 9 is pressed by the pressing rod 12, and the pedestal 7 is lowered together with the lifting rod 9. When passing through the inversion holding member 15, only the molded product 5 is moved to the swinging claw 1.
8 and is accommodated in the accommodation hole 15a.

When the slide 3 further descends, the lower end of the elevating rod 9 enters the concave hole 2.
The downward movement of the slide 3 stops when it comes into contact with the bottom a, thereby also stopping the pressing rod 12, and the subsequent downward movement of the slide 3 is absorbed by the compression spring 14 being compressed.

Next, when the feeder 4 moves to the return process, the stopper 33 rotates the lever 30 in the return direction as the feeder 4 returns. 16 is rotated 180 degrees, and the molded product 5 in the accommodation hole 15a is also inverted together with the inversion holding member 15.

When the slide 3 moves to a rising process after being reversed, the pedestal 7 is also raised together with the lifting rod 9 due to the action of the compression spring 11, and the molded product 5 that has been reversed in the accommodation hole 15a is pushed up to the feed position. Waits for the next clamp operation.

At this time, a portion of the pedestal 7 is located within the accommodation hole 15a to prevent the inversion holding member 15 from rotating excessively.

When the feed bar 4 completes clamping and moves to the advance process, the rotation shaft 28 rotates as the lever 30 returns, but the shaft rod 16 rotates due to the action of the one-way clutch 24. is transported to the next processing station, and at the same time, a new molded product 5 is loaded onto the pedestal 7.

When feeder 4 reaches just before the advance end, stopper 3
3 is separated from the tip of the lever 30, and in this state, the feed lever 4
At the same time as moving to unclamping, a new molded product 5
is placed on the pedestal 7, and the above operation is repeated again.

As detailed above, this invention utilizes the return action of the feeder at the idle station to invert the molded product, making it possible to invert more stably than the conventional inversion during conveyance. It also becomes possible to increase the conveyance speed.

In addition, a substantially Y-shaped swing claw is provided, and each time the reversal support member is reversed, the tip of the swing claw is moved into and out of the accommodation hole of the reversal support member to support the lower surface of the molded product in the accommodation hole. Because of this, it does not require any clamping force compared to clamping around the molded product, and even if the molded product is thin, there is no risk of the molded product deforming or leaving marks on the surface. It has excellent effects such as no

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view;
FIG. 2 is a partially cutaway plan view, and FIG. 3 is a view taken from the direction of FIG. 3 is a slide, 4 is a feed bar, 5 is a molded product, 7 is a pedestal, 15 is an inversion holding member, 16 is a shaft rod, 18 is a swing claw,
18a is a claw body, 24 is a one-way clutch, and 30 is a lever.

Claims (1)

[Claims] 1. In a transfer press that continuously press-forms molded products 5 while sequentially conveying the molded products 5 to processing stations by a feeder 4, a cradle 7 that is raised and lowered by a slide 3 is provided at an idle station of the feeder 4, An inversion holding member 15 having a housing hole 15a for the molded product 5 is provided above the pedestal 7, and the shaft rod 1 is rotatably supported by the bearing tube 23 of the inversion holding member 15.
6, and the other end of the shaft rod 16 is connected to a rotating shaft 28, which is rotated via a lever 30 by the feeder 4 that conveys the molded product 5, and gear trains 27, 26, 25 and a one-way clutch. 24, and a substantially Y-shaped swinging claw 18 with an intersecting portion pivotally supported is provided at the end of the shaft rod 16 on the inversion holding member 15 side, and a base end side 18b of the swinging claw 18 is provided. In this case, the middle part of the actuating pin 20, whose both ends abut against a guide surface 23a having an eccentric center downward with respect to the rotation center of the shaft 16, is pivotally supported, so that the shaft 16 swings every time the shaft 16 is reversed. The distal end side claws 18a of the claws 18 alternately
A device for reversing a molded product in a transfer press, which retracts and retracts into the accommodation hole 15a of No. 5.