JPH06134534A - Device for conveying steel plate - Google Patents

Abstract

PURPOSE:To surely separate a steel plate and convey it with a simple constitution in a steel plate conveying device in which the steel plate is sucked and lifted up with a suction pad. CONSTITUTION:Plural numbers of suction pads 13 sucking an upper surface of a steel plate W are provided on a running body 11 vertically movably through each pad lift device 24. A repeat lift controlling means 31 which repeatedly lifts a suction pad 130 of an end part among the suction pads 13 from a lower end of a lift stroke up to an intermediate height by a set number of times by a pad lifting device 24 is provided. The repeat lift controlling means 31 repeatedly lifts the pad 130 in answer to a detecting signal of an intermediate height detecting sensor 27 provided corresponding to the suction pad 130 of the end part. A lift-up starting commanding means 30 for performing the elevating action of the remainder suction pads 13 after all the repeat lift is finished is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate material conveying device attached to a punch press, a shearing machine, a laser processing machine or the like.

[0002]

2. Description of the Related Art Conventionally, as a plate material conveying device for separating plate materials loaded on a pallet one by one and carrying them into a plate material processing machine, a large number of them are provided in a loader that runs along an erection rail. There is one with a suction pad. The suction pad is attached to an up-and-down type pad mounting frame provided in the loader, and can be moved up and down together with the pad mounting frame.

However, since the stacked plate materials have oil adhered to the surface due to surface treatment or the like, or the plate materials are in close surface contact with each other, the uppermost plate material is lifted by the suction pad. At that time, the plate material below may be lifted up in an overlapping state. If the sheet material is conveyed by the loader while the two sheet materials are overlapped in this way, not only a processing problem of the sheet material processing machine but also an obstacle such as the lower sheet material falling during the transportation occurs.

In order to solve such a problem, of the suction pads provided on the pad mounting frame, the suction pads at the ends can be moved up and down, and after sucking the plate material at each suction pad, It has been proposed that the suction pad is moved up and down several times so that the plate material is made to undulate. According to this, even if two plate materials are adsorbed in an overlapping state, the lower plate material is peeled off due to the corrugation operation, and only one plate can be conveyed. However, in addition to the lifting / lowering drive device for the pad mounting frame, a repeated lifting / lowering device for the suction pads at the ends is required, which causes a problem that the structure is complicated and the cost is high.

In addition to this, as a plate material conveying device for ensuring the separation of one sheet, there has been proposed a device in which, apart from the suction pad of the loader, a fixed frame is provided with a suction pad dedicated to corrugating the plate material so that it can be driven up and down. There is. However, if the suction pad dedicated to corrugation is provided separately from the loader, the structure becomes complicated and the cost becomes high.

It is an object of the present invention to provide a plate material conveying device which has a simple structure and can reliably separate and convey the stacked plate materials one by one.

[0007]

The structure of the present invention will be described with reference to FIG. 1 corresponding to an embodiment. The present invention relates to a plate material conveying device in which a traveling body (11) is provided with a plurality of suction pads (13) for adsorbing the upper surface of a plate material (W) so that the suction pads (13) can be moved up and down through a pad elevating device (24). The suction pad (13 ₀ ) is repeatedly moved up and down by the pad elevating device (24) from the lower end of the elevating stroke to an intermediate height for a set number of times, and a repeating elevating control means (31) is provided. Further, a lifting start command means (30) for causing the remaining suction pads (13) to perform a lifting operation after the repeated lifting and lowering is provided. The suction pad (13 ₀ ) at the end is
It is not always limited to the suction pad (13 ₀ ) at the end,
A suction pad near the end may be included.

[0008]

According to this structure, the plate material (W) is formed as follows.
Can be lifted to a single separated state. First, each suction pad 1 (13) is lowered to suck the uppermost plate material (W) in the stacked state. After this, the suction pads (13
₍₀ ) is repeated from the lower end of the lifting stroke to the intermediate height and lifted up and down a set number of times. Since the plate material (W) is in a wavy state by the repeated lifting and lowering, even if the lower surface of the attracted plate material (W) is overlapped with the lower plate material (W), the end portion is peeled off. In this state, the remaining suction pad (13) rises and the whole plate material (W) is lifted. At this time, the entire plate material (W) overlapping the lower surface is gradually peeled off from the end portion as it is lifted. Edge suction pad (13 ₀ )
The reciprocating up and down can be easily performed, for example, by providing a position detection sensor at a set height in the middle of the stroke and configuring the repetitive up and down control means (31) so as to control the up and down in response to the detection signal of the sensor. You can do it.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. 2 is a plan view showing a plate material processing line, and FIG. 3 is a front view thereof. The loader / unloader device 1 is
A loader 2 for adsorbing and transporting a plate material W as a material from a material station S to a turret punch press 3 and a gripper-type unloader 5 for drawing the finished product plate material W1 to a product station Q are provided. The frame 6 of the loader / unloader device 1 is provided with two parallel rails 10 extending in a cantilever manner on the work table 4 of the turret punch press 3, and both the loader 2 and the unloader 5 have these two rails. It is installed so that it can run freely between 10 units.

The material station S and the product station Q are places where the pallets P on which the material plate material W and the product plate material W1 are respectively loaded are arranged in two stages above and below each other.
These pallets P are placed on the upper and lower receiving rails 6 a provided on the frame 6. Above the material station S, a retractable stock conveyor 8 on which the plate material W1 is temporarily placed when the product plate material W1 is pulled out by the unloader 5.
Is provided. In addition, the pallet P of the material station S
Can be pulled out to the rear evacuation position R by the pallet evacuation device 7 of FIG. 2 so as not to interfere with the product plate material W1 falling from the stock conveyor 8 during unloading.

The loader 2 includes a frame member 1 as shown in a plan view, a front view and a right side view in FIGS. 4, 5 and 6.
A plurality of transport suction pads 13 and two positioning suction pads 32 are provided on the lower surface of the traveling body 11 configured in a rectangular frame shape by 2. This loader 2 is provided with guide rails 1 provided on opposite surfaces of rails 10 on both sides.
5, a linear bearing 14 and a guide roller 16 are installed so as to travel freely. A drive shaft 18 having pinions 17 at both ends is supported at the lower part of the traveling body 11, and the rotation of a traveling drive motor 19 mounted on the traveling body 11 is transmitted to the pinion 17 via a sprocket 20, a chain 21, and a sprocket 22. To be done. Both pinions 17 mesh with a rack 23 (FIG. 10) provided along the rail 10, whereby the loader 2 is driven to travel.

Each of the suction pads 13 and 32 of the loader 2 is connected to a vacuum suction device (not shown) by a pipe and is driven up and down by a pad lifting device 24 including an air cylinder. The positioning suction pad 32 is for positioning the plate material W on the work table 4, and is horizontally movable in an oblique direction by driving the positioning cylinder 33.

Of the transfer suction pads 13 of the loader 2,
The two rows of the plurality of suction pads 13 ₀ at the end portion on the reference side (the side opposite to the turret punch press 3) also serve as a corrugation process for separating one sheet, and as shown in FIG. For this purpose, an intermediate height detection sensor 27 for detecting the intermediate height is provided.

The intermediate height detecting sensor 27 is the suction pad 1
3 is provided with so as to detect a _zero elevation rod 13a and the dog 26 provided on a part of the connecting member 25 for connecting the lifting rods 24a of the pad elevating device 24, for example, a proximity switch. Intermediate height H1 for detecting the intermediate sensor 27, the lifting stroke H of the suction pads 13 ₀
(That is, the height from the rising end of the suction pad 13 to the height reaching the upper surface of the plate W) is set to a predetermined height from the lower end. The intermediate height detection sensor 27 can adjust its installation height according to the set lift stroke H.

The lifting / lowering drive control of the pad lifting / lowering device 24 corresponding to each suction pad 13 of the loader 2 is performed by the NC device 28 shown in the block diagram of FIG. This NC device 2
Reference numeral 8 controls all the operations of the plate material processing line consisting of the loader / unloader device 1 and the turret punch press 3. As a part of the functional means, all the suction pads 13 of the loader 2 are lowered onto the plate material W. In addition to the descent start command means 29 for adsorbing and adsorbing, the lifting start command means 30 for lifting the adsorbed plate material W and the corrugating suction pad 13 ₀ at the end portion from the lower end of the lifting stroke H to the intermediate height H.
Repeated lifting control means 31 for repeatedly lifting and lowering up to 1 a set number of times is provided.

The operation of the above configuration will be described. Loader 2
The uppermost plate material W on the pallet P of the material station S is adsorbed and lifted by the adsorption pad 13, and is carried along the rail 10 to the work table 4 of the turret punch press 3. At the time of lifting, the wavy motion is performed as follows.

That is, as shown in FIG. 8A, the loader 2 stopped above the pallet P of the material station S.
All the suction pads 13 are lowered to the upper surface of the uppermost plate W as shown in FIG. 7B, and the plate W is sucked by all the suction pads 13.

Then, the two rows of suction pads 13 ₀ located at the reference side end of the plate W are repeatedly controlled by the repeating lifting control means 31 (FIG. 1) from the lower end of the lifting stroke H (FIG. 7) to the intermediate height. Up to H1, it is repeatedly moved up and down a set number of times as shown in FIG. 8 (C). As a result, the edge of the plate material W repeats the corrugation operation, so that even if the second or lower stacked plate material W is in close contact with the lower surface of the uppermost plate material W, the edge part is peeled off and only the uppermost plate material W is removed. lifted by the suction pad 13 _0. Repeated lifting of this time is carried out by each time it receives a detection signal of an intermediate height detection sensor 27, it shifted in the downward movement of the suction pad 13 ₀ for waving repeatedly elevation control means 31 from the raised operating.

When the number of repetitions of lifting and lowering reaches the set number of times, when the wavy suction pad 13 ₀ rises to the intermediate height H1, the lifting operation of the remaining suction pads 13 is performed by the command of the lifting start command means 30. As a result, the topmost sheet material W is adsorbed and lifted by all the adsorption pads 13 as shown in FIG. Incidentally, the suction pad 13 ₀ for waving rises as it previously from the middle height H1, to await the completion of the upward movement of the other suction pads 13 on the rising edge.

According to this plate material conveying device, the plate material W is corrugated with a simple structure such that the intermediate height detecting sensor 27 and the reciprocating lift control means 31 are added, so that the plate material W is reliably separated. Can be achieved.

Although the two rows of suction pads 13 ₀ at the end are repeatedly moved up and down in the above embodiment, only the suction pad 13 ₀ at the end of the first row may be repeatedly moved up and down. Alternatively, only one suction pad 13 ₀ at the end corner may be repeatedly moved up and down.
When the suction pad 13 ₀ having only one corner is repeatedly moved up and down, the plate material W is rolled from the corner to facilitate separation, but the suction force of the suction pad 13 ₀ and the pad lifting device 24. The load capacity of may be insufficient. In that case, as shown in FIG. 9, only the suction pads 13 ₁ at the corners are made larger than the other suction pads 13, and the pad lifting device is also made large.

Although different from the present invention, in the loader 36 having a construction in which the loader traveling body 35 is provided with a pad mounting frame 36 via the frame elevating mechanism 34 and each suction pad 13 is provided therein as shown in FIG. Alternatively, as in the example of FIG. 9, only the suction pads 13 ₁ at the corners may be made large, and the corrugation operation of the plate material W may be performed by repeatedly elevating and lowering the frame elevating mechanism 34. During the repeated lifting and lowering, the suction of the other suction pad 13 is released.

[0023]

According to the plate material conveying apparatus of the present invention, the suction pads at the end portions are moved from the lower end of the ascending / descending stroke by the pad elevating / lowering device in a structure in which the respective suction pads can be raised / lowered on the traveling body through the respective elevating / lowering devices. Since it is equipped with a repeated lifting control means that repeatedly lifts and lowers a set number of times to the intermediate height, a simple structure that only provides this repeated lifting control means ensures that the topmost plate from the stacked plates is It can be lifted separately and transported to the target position.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a plate material conveying device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a plate material processing line to which the plate material conveying device of the embodiment is applied.

FIG. 3 is a front view of the same.

FIG. 4 is a plan view of a loader in the plate material conveying device.

FIG. 5 is a front view of the same.

FIG. 6 is a right side view of the same.

FIG. 7 is a front view showing the vicinity of a suction pad of the plate material conveying device.

FIG. 8 is an operation explanatory view of the plate material transport device.

FIG. 9 is a schematic plan view of another embodiment.

FIG. 10 is a front view of a reference proposal example of the plate material conveying device.

[Explanation of symbols]

1 ... Loader / Unloader Device, 2 ... Loader, 3 ... Turret Punch Press, 5 ... Unloader, 10 ... Rail, 11
... running body, 13, 13 ₀ ... suction pad, 24 ... pad lifting device, 26 ... dog, 27 ... intermediate height detection sensor, 2
8 ... NC device, 29 ... Descent start command means, 30 ... Lifting start command means, 31 ... Repeated lifting control means, W ... Plate material, P ... Pallet, H ... Lifting stroke, H1 ... Intermediate height, S ... Material station

Claims (1)

[Claims] 1. A traveling body is provided with a plurality of suction pads for adsorbing an upper surface of a plate material so that the suction pads can be moved up and down through a pad elevating device, and the suction pads at the ends of the suction pads are moved up and down by the pad elevating device. A plate material conveying device provided with a repeating elevating control means for repeatedly elevating a set number of times from the lower end of a stroke to an intermediate height, and lifting start command means for causing the remaining suction pads to perform an ascending operation after the repeated elevating.