JPH0731861Y2 - Lift stroke conversion device for transfer feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a lift stroke conversion device for a transfer feeder for converting a lift stroke of a transfer bar.

[Conventional technology]

Conventionally, a transfer feeder provided in a transfer press has a pair of transfer bars arranged in parallel in a work transfer direction (feed direction), and each work is processed by operating these transfer bars in a vertical two-dimensional direction. It is designed to be transported to a station and to be loaded and unloaded.

[Problems to be solved by the device]

However, in the conventional transfer feeder, the lift stroke of the transfer bar is the same throughout the entire process.

For this reason, for example, when a link drive press is installed on the upstream side and an eccentric transfer press is installed on the downstream side to perform draw forming with the link drive press and normal forming with the eccentric transfer press,
Due to the difference in the slide stroke of each press, the transfer bar and the upper die interfere with each other to prevent the smooth transfer of the work, or the die must be designed in consideration of the interference, so the design conditions are restricted. There was a problem.

The present invention has been made for the purpose of improving the above-mentioned inconvenience, and provides a lift stroke conversion device for a transfer feeder in which a lift stroke at the time of carrying a work into an upstream press is reduced to provide a mold design. It is intended to facilitate it.

[Means and Actions for Solving the Problems]

In order to achieve the above-mentioned object, the present invention divides a lift beam, which supports a transfer bar horizontally mounted on a crossbar so as to be movable in a feed direction, into an upstream side and a downstream side, and these lift beams are vertically moved by a lift mechanism. A reduction mechanism that movably supports and decelerates between the lift mechanism of the upstream lift beam and the lift mechanism of the downstream lift beam so that the lift stroke of the upstream lift beam is smaller than the lift stroke of the downstream lift beam. The lift stroke conversion device of the transfer feeder that prevents interference with the mold by reducing the lift stroke of the transfer bar that carries the work to the upstream processing station that performs drawing processing. is there.

〔Example〕

 An embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, reference numeral 1 denotes a press body, and a plurality of bolsters 2 are installed on a bed 1a, and a lower die 3 is placed on each of the processing stations W ₁ , W _2, ... On the bolster 2.

A slide 4 is provided above each of the bolsters 2 so as to be vertically movable, and a work 6 is molded between an upper die 5 and a lower die 3 attached to the lower surface of the slide 4. There is.

On the other hand, 7 in the figure is a pair of lift beams arranged side by side in the feed direction A, divided into an upstream side 7 ₁ and a downstream side 7 ₂ for each bolster 2, and at the bottom of each lift beam 7 ₁ , 7 ₂ . Are supported by the lift mechanism 8.

A plurality of carriers 10 connected to each other by a transfer bar 9 are provided on the upper surfaces of the lift beams 7 ₁ and 7 ₂ .

Each of these carriers 10 has a roller 12 that rolls on a guide rail 11 laid on the lift beam 7 at the bottom,
It is movable along the guide rails 11 in the feed direction A, and a tilt mechanism 13 is installed on each carrier 10, and a crossbar 14 is laid horizontally between the tilt mechanisms 13 facing each other. Work holding means 15 such as a vacuum cup for holding the work 6 is attached to these cross bars 14.

Reference numeral 18 in the drawing denotes a cam box installed on the downstream side in the feed direction A, which is a feed cam rotated by the power taken out from the press body 1 by a power take-out device (not shown).
19 and a lift cam 20 are housed.

The feed cam 19 and the lift cam 20 are circumferentially in contact with a feed lever 21 and a lift lever 22 whose lower ends are axially supported, and the upper ends of the levers 21 and 22 are moved in the feed direction A as the cams 19 and 20 rotate. It is designed to be rocked.

The upper end of the feed lever 21 is connected to the feed carrier 24 via a link 23, and the feed carrier 24 reciprocates in the feed direction A as the feed lever 21 swings, and at the same time, the feed carrier 24 and the transfer bar 9 are connected. The interlocking rod 25 between the two, and also the upstream lift beam 7 ₁
To a carrier 10 which is provided, another connecting rod between the downstream lift beams 7 _second carrier 10 that most disposed upstream
They are connected by 26, and the carrier 10 is reciprocated in the feed direction on the lift beams 7 ₁ and 7 ₂ as the feed carrier 24 reciprocates.

On the other hand, one end of a connecting rod 28 is connected to the upper end of the lift lever 22.

The connecting rod 28 is extended to the lifting mechanism 8 side along the downstream lift beams 7 _2, a rack formed on connecting rod 28 to the pinion 8a provided in each lifting mechanism 8 is engaged.

The lift beams 7 ₂ be supported on the lift rod 29, the pinion 8a and meshing with the pinion 8b on the rack 29a formed in the lift rod 29 is engaged, via the lift rod 29 with the movement of the connecting rod 28 each lift beams 7 ₂ is adapted to be moved vertically while maintaining a horizontal Te.

The connecting rod 28 of the lifting mechanism 8 upstream installed via the speed reduction mechanism 31 to lift beams 7 ₁ on the upstream side of the connecting rod 28
Is linked to.

The deceleration mechanism 31 decelerates to reduce the lift stroke in order to avoid interference between the upper die 5 and the work 6 when the work 7 is carried into the processing station W ₁ provided on the upstream side of the press body 1. A clutch means 32 composed of a hydraulic clutch is provided in the middle of the lift beam 7 ₁ on the upstream side and a lift on the downstream side by turning off the clutch means 32 during a forced lift such as during setup. The interlocking relationship of the beams 7 ₂ can be separated.

Next, the operation will be described. The feed cam 19 and the lift cam 20 provided in the cam box 18 serve as a feed lever.
21 and the lift lever 22 are oscillated, the lift beam 7 moves up and down, and the transfer bar 9 is reciprocated in the feed direction on the lift beam 7, so that the workpiece 6 carried in from the upstream side is processed at each processing station W ₁ , W ₂ ... Are sequentially transported to each of the processing stations W ₁ , W ₂ ,.

The upstream side of the lift beams 7 ₁ lift operation speed reduction mechanism 31
To be transmitted at a reduced speed to the downstream side lift beams 7 _2, the downstream lift the lift stroke of the upstream lift beams 7 ₁ against lifting stroke of the beam 7 ₂ is reduced, the processing stations W do this by drawing It is possible to prevent the work 6 and the upper die 5 from interfering with each other when the work 6 is loaded into ₁ .

That is, the work 6 carried into the processing station W ₁ is
As shown in FIG. 6, the lift stroke may be reduced because it is a sheet that has not been processed yet, and since the height H of the work 6 becomes high as shown in FIG. 7 after drawing, the lift stroke is increased. Is taken out from the processing station W ₁ by the transfer bar 7 ₂ on the downstream side, and is sequentially conveyed to the next processing station W ₂ via the idle station i ₁ .

[Effect of device]

As described in detail above, the present invention divides the lift beam supporting the transfer bar into the upstream side and the downstream side, and the lift stroke of the lift beam on the upstream side between the lift mechanism that lifts and lowers these lift beams. Since they are linked via a reduction mechanism that makes the lift stroke of the downstream lift beam smaller than the lift stroke, even if the upstream lift beam and the downstream lift beam are driven at the same time, the transfer supported by the upstream lift beam is supported. Since the lift stroke of the bar becomes small, the work suction means does not interfere with the slide or the upper die even if the slide strokes of the upstream press and the downstream press are different.

As a result, the work can be transported smoothly and safely, and the safety area without interference can be increased.
Since there are fewer restrictions on the design of the mold and the design of the mold is easier, the structure of the mold is also simplified,
It is possible to reduce the die cost.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is an overall plan view, FIG. 2 is a front view of the same, FIG. 3 is an arrow view taken along line III-III of FIG. 2, FIG. FIG. 5 is an enlarged view of a main part, and FIGS. 6 and 7 are operation explanatory views. 7 is a lift beam, 7 ₁ is an upstream lift beam, 7 ₂ is a downstream lift beam, 8 is a lift mechanism, 31 is a speed reduction mechanism, and 32 is a clutch means.

Claims (2)

[Scope of utility model registration request] 1. A lift beam 7 for movably supporting a transfer bar 9 horizontally mounted on a crossbar 14 in a feed direction A is divided into an upstream side 7 ₁ and a downstream side 7 ₂ , and these lift beams 7 ₁ , 7 ₂ by the lift mechanism 8 while supported vertically movable, and the upstream-side lift beams 7 ₁ lift mechanism 8, between the downstream lift beams 7 ₂ lift mechanism 8, the lift stroke of the upstream lift beams 7 ₁ Is the downstream lift beam 7 ₂
Lift stroke conversion device for a transfer feeder, which is interlocked by a speed reduction mechanism 31 that reduces the speed so that the lift stroke is smaller than the lift stroke. 2. The lift stroke conversion device according to claim 1, wherein the deceleration mechanism 31 is provided with a clutch means 32 which disconnects the upstream lift beam 7 ₁ and the downstream lift beam 7 _{2 from each} other.