JPS6025316Y2 - Workpiece supply device in press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a workpiece feeding device for feeding workpieces of a press, such as sheets, blanks, etc., to an idle station provided before the first processing station of the press.

In conventional transfer presses, the de-stack
The blanks lifted at the station are intermittently conveyed by fingers attached to a feed bar and fed into the first processing station of the transfer press.

Therefore, in order to avoid interference between the distack device and the feed bar, the degree of freedom in design is reduced, and the shape of the blank is restricted.Furthermore, the fingers must be adjusted to match the shape of the blank, making it difficult to set up when changing product types. There is a problem that the work requires a considerable amount of time, and furthermore, there is a problem that mis-gripping by the fingers occurs frequently due to insufficient positioning of the blank.

Also known is a device in which the fingered feed bar is shortened to the idle station next to the disk station by horizontally moving the vacuum cup of the disk disk device in the press direction by one feed pitch. However, it requires a vacuum cup moving mechanism, which increases the cycle time due to its movement, making it unsuitable for high-speed transfer presses.
There are problems such as the need for idle fingers and their adjustment.

This idea was made in view of the above circumstances, and uses a magnetic belt feeder to intermittently transport workpieces from the distack station to the idle station before the first processing station of the press. In this idle station, the object is to quickly and accurately position the press so that it can be transferred to the feed bar of the press.

Hereinafter, embodiments of this invention will be described in detail based on the drawings.

In Figures 1 to 3, 1 is a transfer press, 2 is a press slide, and 3 is a transfer press.
Bolster, 4 is a distack device located at the distack station (a), 5 is a multiple blank detection device located at the blank supply idle station (b), and 6 is installed at the transfer press idle station (c). blank knockout device, 7
8 is a fixed blank holder, and 8 is an elevating blank holder.

Reference numerals 9 and 10 indicate an upper mold and a lower mold provided in the first processing station.

Reference numeral 11 denotes a magnetic belt feeder arranged from the de-stacking device 4 to the knock-out device 6, which feeds endless belts 11A to 11D and these belts IIA to II.
It is composed of magnets 11E to 11H provided close to the upper surface of the belt running on the lower side of the belt 1.
1A to 11D are driven intermittently by 1 feed pitch P.

12.13 is a pair of feed bars, and 14.15 is its finger.

The feed bars 12 and 13 are driven by the drive source of the transfer press 1 and move in two or three dimensions. The sample is intermittently transported to the processing station (d) and the second processing station (not shown).

The destacking device 4 is of a generally known type and includes a staff lifter 17 on which the blank B is placed, a magnetic belt floater 18, and a vacuum cup 16 that is raised and lowered by a lifting cylinder 19. The blanks B are lifted vertically upward one by one by a vacuum cup 16 without interfering with the belt feeder 11, and the receiver is passed to the magnetic belt feeder 11 to attract them.

The multiple blank detection device 5 includes a table 20 provided slightly below the magnetic belt feeder 11 at a height that does not interfere with the conveyance of the blank B;
0, and proximity switches SW1 to 1 for detecting the area of the blank mounted on the chiffle 20 around the thickness detector 21.
5W1o and their control circuits (not shown).

The plate thickness detector 21 has, for example, a spindle equipped with a measuring tip at the tip that can move forward and backward, and detects the amount of displacement of the spindle when the measuring tip is brought into contact with the lower surface of the blank B that has stopped at station (B). This is to detect the thickness of blank B.

, and three proximity switches SW2. of the proximity switches SW1 to SW1o. SW5. SW9 is station (
(b), and the other proximity switches are placed at a required distance from below this normal blank B1 in the direction of conveyance. .

Therefore, when two or more blanks B are conveyed in an overlapping manner, the plate thickness detector 21 detects this fact.

Also, as shown in Figure 2, two blanks B,
When B2 are conveyed in an overlapping and shifted state, even if only one normal blank a is detected by the plate thickness detector 21, the proximity switches SW6 to SW5 are activated.
Since another blank is detected by W1o, multiple blank conveyance is detected.

The plate thickness detector 21 and the proximity switches SW, -SW, o are activated by a timing signal generated from the drive mechanism of the magnetic belt feeder 11 when the blank B stops at the station (B).

In this way, since the multiple blank detection device 5 detects the multiple blank state, if the multiple blanks are discharged to the outside of the conveyance path by the removing means (not shown), two or more blanks can be simultaneously processed in the first processing. - It will not be sent to John (d).

As shown in FIGS. 3 and 4, the knock-out device 6 includes a guide rod 23 contained in a support chamber by a support frame 22 disposed between the magnetic belts 11B and 11C, a push-down plate 24 attached to the lower end; and a push-down plate 24 attached to the support frame 22;
The lower end of the piston rod 25 is connected to a lift cylinder 26, and a limit switch 27 for detecting the upper limit of the lift of the push-down plate 24.

Details of the fixed blank pedestal 7 and the elevating blank pedestal 8 are shown in FIGS. 4 to 6.

The lifting blank pedestal 8 is formed into an H shape when viewed from above, and the fixed blank pedestal 7 is located within its two recesses 28 and 29.

The elevating blank pedestal 8 is fixedly planed so that its upper surface is located below the upper surface of the fixed blank pedestal 7 when descending.
It is fitted in.

This elevating blank pedestal 8 includes an elevating drive cylinder 30 attached to the support bracket 7A of the fixed blank pedestal 7, and an H-shaped pedestal plate 8A connected to the upper end of the piston rod 31 of the cylinder 30 with a pin. A guide rod 34.35 whose upper end is connected by a pin to the lower surface of the end in the left-right direction (in the direction of blank conveyance) of the pedestal plate 8A and which moves up and down while being guided by a guide member 32.33 extending from the support bracket 7A.
, a limit switch operating cam 36 attached to the pedestal plate 8A, and a limit switch operating cam 37 attached to the lower end of the guide rod 34.

Then, a limit switch 38 for starting the descent of the lifting blank pedestal 8 and a knock-out device 6 corresponding to the limit switch operating cams 36 and 37, and a lowering stop and knock-out device 6 for the blank pedestal 8 A limit switch 39 for starting the upward movement of the support bracket 7A is attached to the support bracket 7A.

Next, the operation of this workpiece supply device will be explained.

First, from staff lifter 17 to vacuum cup 1
Blank B, which was attracted and lifted by 6, is
It is attracted to the magnet belt feeder 11 by its magnetic force, and the blank supply idle station (b)
The blank B is then fed by one feed pitch P and stopped, and the multiple blank detection device 5 performs multiple blank detection, and the normal one blank B is again driven by the magnetic belt feeder 11 to be transferred to the next transfer sheet. It is sent to the press idle station (c) by one feed pitch P and then stopped.

At the same time as the blank B stops at this idle station (c), the blank B is moved from the magnetic belt feeder 11 by the push-down plate 24 of the knockout device 6 onto the elevating blank pedestal 8 that has risen directly below it. It is pushed away and pressed, and then the lifting blank pedestal 8
moves down together with the push-down plate 24 while holding the blank B therebetween.

Then, when the blank B comes into contact with the upper surface of the fixed blank pedestal 7, the push-down plate 24 stops while holding the blank B, and the limit switch activation cam 36 of the elevating blank pedestal 8 activates the limit switch 39. Then, at the same time as the elevating blank pedestal 8 stops, the push-down plate 24 starts to rise.

'In this way, the blank B is placed on the fixed blank pedestal 7.
Finger 14 correctly positioned above and attached to feed bar 12.13 of transfer press 1
It is then firmly gripped by the feed bar 12.13 and fed centrally into the first processing station of the press 1).

Then, when the upper end of the guide rod 23 activates the limit switch 27, the elevated push-down plate 24 stops rising and waits for the next descending operation command.

The width of the push-down plate 24 of the knock-out device 6 is such that it passes between the magnet belts IIB and IIC, and the width of the pedestal plate 8A of the lifting blank pedestal 8 is also
Since the spacing between the fingers 14 and 15 is narrower than the spacing between the fingers 14 and 15, they do not completely intersect with each other.

In addition, a knock-out device 6 and an elevating blank pedestal 8
The operation cycle and timing of the feed bars 12 and 13 are set to operate smoothly with a predetermined time lag from the operation cycle and timing of the feed bars 12 and 13.

This invention consists of a distack device 4 that sucks and lifts the workpieces B placed one by one as described above, and a press 1 that sucks and lifts the lifted workpieces B without interfering with the distack device 4. A magnetic belt feeder 11 transports the workpiece B intermittently and sequentially to the idle station (c), and a magnetic belt feeder 11 transports the workpiece B transported to the idle station (c).
A knock-out device 6 raises and lowers the workpiece B to a fixed blank pedestal 7 disposed below without interfering with the fixed blank pedestal 7; It is composed of an elevating blank pedestal 8 which receives the blank from the station and transfers it to the fixed blank pedestal 7 without shifting its position.
The workpiece B can be transported from (a) to the idle station (c) in front of the first processing station of the transfer press without any adjustment, regardless of its shape.
It is possible to significantly shorten the setup work time when changing the manufactured product type, and at the idle station (c), the workpiece B can be placed in the position where it is easiest to correct the posture with the fingers 14, so that the idle・The incidence of misgrip at station (c) is lowered and the operating rate is improved.

Furthermore, since the posture correction force of the workpiece is large, the staff can be positioned relatively roughly.

Furthermore, since the relationship between the height of the workpiece B feed line of the magnetic belt feeder 11 and the feed line height of the feed bar 12.13 can be freely set, the fingers 14 and the feed bar 12.13 can be It can be structured so that it can be inserted under the belt feeder 11, which has the effect of widening the size range of workpieces that can be transported and improving the versatility of the device.

[Brief explanation of drawings]

The drawings show an embodiment of this invention; FIG. 1 is a general schematic side view, FIG. 2 is a plan view of the same, and FIG.
4 is a partially cutaway side view showing the configuration of the knock-out device and the blank pedestal, FIG. 5 is an enlarged plan view taken along the line The figure is a sectional view taken along line VI-VI in FIG. 5. 1... Press, 4... Distack device, 6... Knock out device, 7...
・Fixed blank pedestal, ...Elevating blank pedestal,
11...Magnetic belt feeder, (c)...Press idle station, B.
...Work material.

Claims (1)

[Scope of utility model registration request] A distack device 4 that sucks and lifts the placed workpieces B one by one, and an idle station (c) of the press 1 that sucks and lifts the lifted workpieces B without interfering with the distack device 4. A fixed blank is placed below the magnetic belt feeder 11 without interfering with the magnetic belt feeder 11, and the workpiece B transported to the idle station (c) is conveyed intermittently and sequentially to the idle station (c). A knock-out device 6 moves up and down to the pedestal 7, and a knock-out device 6 moves up and down without interfering with the fixed blank pedestal 7, receives the workpiece B from the knock-out device 6, and receives the workpiece B on the fixed blank pedestal 7 without shifting its position. is a workpiece supply device for a press, consisting of an elevating and lowering blank pedestal 8.