JPH057954A - Work carrying device in press machine - Google Patents

Abstract

PURPOSE:To narrow the necessary space of an idle process and to shorten the whole press machine by placing plural pairs of feed bars provided with a cross bar alternately and driving separately each pair of feed bars. CONSTITUTION:On the both sides of a work carrying line, two pairs of feed bars 13 whose one pair is constituted of two left and right pieces are placed so that its reciprocating movement can be executed freely. Subsequently, a cross bar 14 provided extending over between the feed bars of both sides in each pair thereof, and also, at a prescribed interval is provided on every other bar in each pair. Next, to each cross bar thereof 14, the holding implement of a work is attached, and also, a driving device 21 for allowing each pair of feed bare 13 to reciprocate separately is provided. Accordingly, a stroke extending from the holding position of the cross bar to an idle position in one pair can be made shorter than a stroke extending from the holding position of the cross bar to a working position in the other pair, and the necessary space of an idle process can be narrowed, therefore, the whole press machine can be shortened.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Generally, a transfer press machine is provided with a work transfer device for sequentially transferring a work to each process. Conventionally, as shown in FIG. 7, this work transfer device is attached to a pair of left and right feed bars 61 disposed on both sides of a work transfer process, and is attached between both feed bars 61 at predetermined intervals. A cross bar 62, a holder for holding a work, such as a suction cup 63, attached to the cross bar 62, and a drive device (not shown) for reciprocating the feed bar 61 in the front-rear direction with a predetermined stroke. It had been.

By the way, usually, in a transfer press machine, an upright section 51 is arranged on the way, and the location of the upright section 51 is an idle process B in which nothing is done.

A suction cup 63 for holding the work,
That is, the crossbar 62 is
Between the standby position (a) and the center position of the machining process A (hereinafter referred to as the machining position) (b), and between the standby position (a) and the center position of the idle process B (hereinafter referred to as the idle position) (c) And was reciprocated with the same stroke (S).

[0005]

According to the above-mentioned conventional structure, the standby position (a) and the processing position (b) of the crossbar 62.
, And the standby position (b) and the idle position (c) are the same, but in reality, the required space at the standby position (b) is equal to the width of the suction cup 63. However, since the space is the same as the space required in the processing step A, the transfer press machine as a whole becomes long.

[0006] Therefore, an object of the present invention is to provide a work transfer device in a press machine which can solve the above problems.

[0007]

In order to solve the above problems, a work transfer device in a press machine according to the present invention has two feed bars, one set of two left and right, on each side of a work transfer path. Crossbars are arranged so as to be reciprocally movable, and are provided at predetermined intervals across the feedbars on both sides of each set. Every other crossbar is provided in each set, and a work holder is attached to each of these crossbars. ,
In addition, a drive device for separately reciprocating the above-mentioned respective feed bars is provided.

[0008]

According to the above construction, two sets of feed bars having alternating cross bars are provided, and the feed bars of each set are driven separately. The stroke to move from the position to the idle position and the stroke to move the other set of crossbars from the standby position to the machining position can be different, that is, the stroke from the standby position to the idle position can be changed from the standby position to the machining position. Can be shorter than the stroke.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIGS. 5 and 6, reference numeral 1 denotes a transfer press machine capable of sequentially performing a plurality of processes while transporting a work along a predetermined transport path D, and a work transport device 2 that sequentially transports the work along the transport path D. Is provided.

The work transfer device 2 will be described in detail below with reference to FIGS. At both sides of the work transfer path D, a lifting bar 11 is provided in the front-back direction along the work transfer path D.
Are arranged so as to be able to move up and down via the lifting drive device 12. Further, two feed bars 13 are movably provided in the front-rear direction on each of the elevating bars 11, and a work holding tool (for example, a suction cup) is provided so that two feed bars 13 form one set. The crossbars 14 are connected to each other.

That is, as shown in FIG. 4, on each lifting bar 11, a plurality of gate-shaped driven carriages 15 corresponding to each step are movably guided and supported via guide rollers 16. The driven carriages 15 on both sides corresponding to each other are connected by the crossbar 14.

The two feed bars 13 are arranged on the elevating bar 11 so that the recesses 15b between the legs 15a of the driven carriages 15 are inserted, and the left and right feed bars 12 are connected to each other by connecting pins. Alternately connected to the driven carriage 15 via 17. For example,
In FIG. 1, the first driven carriage 15A connected to the first crossbar 14A on the upper side, the first driven carriage 15A and the first feedbar 13A on the inner side are connected to each other via a connecting pin 17. In addition, the second driven carriage 15B connected to the second crossbar 14B on the lower side, and the second driven carriage 15B and the second feedbar 13B on the outer side are connected to each other via the connecting pin 17. There is. That is, the first feed bar 13
The first crossbars 14A connected to A and the second crossbars 14B connected to the second feed bar 13B are alternately arranged along the work transfer path D.

Therefore, the left and right feed bars 13 connected to each other by the cross bars 14 arranged alternately.
There will be two sets of. Further, the two sets of feed bars 13 are reciprocally moved in the front-rear direction by the reciprocating drive devices 21 provided separately.

That is, as shown in FIGS. 1 and 2,
The drive carriages 22 are arranged at the front and rear positions on the lower end portions of the left and right lifting bars 11, respectively, and
For example, the end of the first feed bar 13A, which is one set, is connected to the first drive carriage 22A on the upper hand side, and the second feed bar, which is the other set, is connected to the second drive carriage 22B on the lower hand side. The ends of 13B are connected.
Of course, the left and right first driving carriages 22A and the second driving carriages 22B are connected to each other by the connecting member 2 respectively.
3 are connected to each other.

Further, as shown in FIG. 2, in one driving carriage 22 in each of the above-mentioned groups, the lower end portion is supported on the floor 24 side through a supporting shaft body 25 via a supporting shaft body 25.
6 is connected to the upper end portion of 6 via a connecting pin 27 and a slide member 28, and the middle portion of each rocking lever 26 is
First and second swing cylinders 29A and 29B for swinging the swing lever 26 at a predetermined angle are connected to each other.

Therefore, the first swing cylinder device 2
When the first drive carriage 22A is reciprocally moved by 9A, the first feed bar 13A is reciprocally moved by a predetermined stroke via the first driven carriage 15A, and similarly, by the second swing cylinder device 29B. , Reciprocally move the second driven carriage 15B,
The second feed bar 13B is reciprocated with a predetermined stroke.

Further, in the transfer press 1, the machining process A and the idle process B are alternately provided, and the space width of the idle process B provided in the upright section 3 is smaller than that of the machining process A. Has also been shortened.

The elevating drive device 12 for elevating the elevating bar 11 raises and lowers rack shafts 31 supported movably at predetermined places, and these rack shafts 31 via a pinion 32 and a conductive shaft 33. And a raising / lowering motor 34 for raising and lowering.

In the above structure, when the work is moved along the predetermined transport path D, the first and second driven carriages 15A and 15B are respectively stroked by the first and second swing cylinder devices 29A and 29B. You just have to move it back and forth.

That is, as shown in FIG. 3, the first crossbar 14A for transporting the workpiece in the idle process B to the machining process A is operated by the first swing cylinder device 29A.
Moved to the idle position (b). Then, after holding the work at this idle position (b), the first crossbar 1
4A is moved to the processing position (C), where the work is placed on the die, and then the standby position of the crossbar 14 (A).
Returned to. The return stroke (L ₂ ) is longer than the entry stroke (L ₁ ) from the standby position (a) to the idle position (b) because the mold is provided.

When the work is conveyed from the processing step A to the idle step B, the second crossbar 14B is used. That is, the second crossbar 14B in the standby position (a) enters the machining position (c) on the hand side to hold the work in the suction cup, and then moves to the next idle position (b).
Move to and release the work here. After that, it is returned to the idle position (b).

In this case, unlike the case of the first crossbar 14A, the entry stroke (L ₃ ) becomes longer and the return stroke (L ₄ ) becomes shorter. The first crossbar 1
4A return stroke (L ₂ ) and second crossbar 14B
Is equal to the intrusion stroke (L ₃ ).

In this way, since two sets of feed bars are provided and the feed bars of each set are driven separately, the cross bar 14 of one set is moved from its standby position (a) to its idle position (roth). ) And the stroke for moving the other set of crossbars 14 from the standby position (a) to the processing position (c), that is, from the standby position (a) to the idle position (b). (L ₁ ) can be made shorter than the stroke (L ₃ ) from the standby position (A) to the processing position (C), so that the space required for the idle process B can be narrowed.

In the above embodiment, since the machining process A and the idle process B are alternately arranged, that is, the upright portion 3 is provided between the machining processes A, for example, the machining process B is continuously performed. Compared to the case where the slide bar is provided, it is not necessary to lengthen the slide itself, and the arrangement interval of the lift rack shaft bodies 31 that support the lift bar 11 can be shortened. Therefore, the middle of the lift bar 11 is supported auxiliary. No auxiliary support mechanism is required.

[0025]

As described above, according to the structure of the present invention, since two sets of feed bars having alternating cross bars are provided and each set of feed bars is driven separately, one set of feed bars is driven. The stroke for moving the crossbar from the standby position to the idle position and the stroke for moving the other set of crossbars from the standby position to the machining position can be different, that is, the stroke from the standby position to the idle position can be changed. The stroke from the standby position to the processing position can be made shorter, and therefore the space required for the idle process can be narrowed, so that the entire press machine can be shortened.

[Brief description of drawings]

FIG. 1 is a plan view of a main part of a work transfer device according to an embodiment of the present invention.

FIG. 2 is a side view of a main part of the work transfer device in the embodiment.

FIG. 3 is a plan view of a main part of a feed bar in the work transfer device of the embodiment.

FIG. 4 is a cross-sectional view of a main part of a feed bar in the work transfer device of the same embodiment.

FIG. 5 is an overall cross-sectional view of the transfer press machine in the example.

FIG. 6 is an overall horizontal sectional view of the transfer press machine in the example.

FIG. 7 is a plan view of a main part of a work transfer device in a conventional example.

[Explanation of symbols]

 1 Transfer Press Machine 2 Work Transfer Device 11 Elevating Bar 12 Elevating Drive Device 13 Feed Bar 14 Cross Bar 15 Driven Carriage 21 Reciprocating Drive Device 22 Drive Carriage

Claims (1)

What is claimed is: 1. A left-hand and right-hand one on each side of the work transfer path.
Two sets of feed bars, which constitute a set, are arranged so as to be able to reciprocate, and cross bars are provided between the feed bars on both sides of each set and at predetermined intervals. A work transfer device for a press machine, comprising a work holder attached to each crossbar, and a drive device for separately reciprocating the feedbars of each set.