JPH0583869U - Plate material number detector - Google Patents

Abstract

(57) [Summary] [Purpose] The cycle time is shortened and the number of sheets can be easily detected. [Structure] A plate material number detection device 20 includes a light projecting unit 21 and a light receiving unit 22 that project and receive light on an end surface of a plate material, and a light receiving unit 22.
And a light projecting and receiving control circuit 26 for detecting the number of sheets of plate material by measuring the light receiving state of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plate material number detecting device, and more particularly to a plate material number detecting device for detecting the number of plate materials taken out by a plate material adsorbing and holding part that can be raised and lowered from a plate material stacking part on which a plurality of plate materials are stacked.

[0002]

[Prior art and its problems]

 In a plate material processing line, generally, a material station on which material plate materials are loaded, a loader as a plate material loading device movably provided above the material station, and a plate material processing machine are provided. The loader generally has a suction pad capable of moving up and down for sucking and holding a plate material.

When the plate material is carried in, the loader moves onto the material station, and the material pad material of the material station is held on the adsorption pad by raising and lowering the adsorption pad of the loader. Then, the loader moves onto the plate material processing machine, and the material plate material held by the suction pad is carried into the plate material processing machine. When the material plate material of the material station is held by the suction pad, two or more material material plates may be lifted by the adhesive force of the oil component interposed between the material material plates. Therefore, the loader may be provided with a plate material detection device for detecting the number of plate materials held by the suction pad.

As this plate number detecting device, for example, there is a detecting device which detects the number of plate members by sandwiching the plate members lifted by the suction pad and comparing the sandwiched thickness with the thickness per plate member. However, such a detection device has a problem that a gripping operation of the plate material is required each time the number of plate materials is detected, and a cycle time for loading the plate material is long. Further, depending on the adhered state of each plate material, the end surface portion of each plate material may be peeled off, and it is difficult for the conventional plate material number detecting device to detect the number of such plate materials.

An object of the present invention is to reduce the cycle time and to easily detect the number of sheets regardless of the adhered state of the plate material.

[0006]

[Means for Solving the Problems]

 A plate material number detecting device according to the present invention is a device for detecting the number of plate materials taken out by a plate material adsorbing / holding unit that can be raised and lowered from a plate material stacking unit on which a plurality of plate materials are stacked. This device includes a light emitting / receiving unit and a detection unit. The light-emitter / light-receiver is arranged on the side of the plate material that is taken out by the plate-material suction holder and moves up and down, and emits and receives light to and from the end surface of the plate material. The detection means measures the light receiving state of the light emitting / receiving section to detect the number of plate materials.

[0007]

[Action]

 In the present invention, when detecting the number of plates, the plates are first taken out from the plate stacking unit by the plate suction holding unit, and the taken-out plates move up and down together with the plate suction holding unit. At this time, the light projecting / receiving unit arranged on the side of the ascending / descending plate material projects light to the end surface of the plate material. The light projected on the end surface of the plate material is reflected by the end surface of the plate material and received by the light emitting / receiving unit. Then, the detecting means measures the light receiving state of the light emitting and receiving portion to detect the number of plate materials.

In this case, since the number of plate materials is detected in accordance with the ascending / descending operation of the plate material holding unit, an extra operation for detecting the number of plate materials is not required, and the cycle time can be shortened. However, since the light is projected onto the end face of the plate material and the number of sheets is detected from the light receiving state, the number of sheets can be easily detected regardless of the attached state of the end face of the plate material.

[0009]

【Example】

 FIG. 1 shows a plate material carrying-in system to which an embodiment of the present invention is applied. In FIG. 1, a plurality of material carts 1 are provided in this plate material loading system. A material plate W is loaded on each material truck 1. Further, the plate material carry-in system is provided with a conveyor device 16 into which the material plate material W on the material carriage 1 is carried. A rail 2 is installed above the material cart 1. A loader 3 is movably provided on the rail 2.

The loader 3 includes a trolley portion 5 that can travel on the rails 2, a pantograph-shaped connecting link 6, and a suction device 9 that is connected below the connecting link 6 via a support plate 7 and a fixed frame 8. Have The trolley part 5 is provided with an ascending / descending part 12 for elevating and lowering the entire adsorption device 9. The elevating part 12 is composed of the hoisting machine 10 and the chain 11. Below the suction device 9, a holding pad 15 for sucking and holding the material plate W is provided.

One end of a support frame 17 extending downward is fixed to the trolley portion 5 on the side of the suction device 9. A laser type photoelectric switch 20 is provided below the support frame 17 as a plate number detecting device. This plate material carry-in system has a control unit 30 as shown in FIG. The control unit 30 includes a microcomputer including a CPU, RAM, ROM and the like. A keyboard 31, a tape reader 32, a laser photoelectric switch 20 and other input units are connected to the control unit 30. Further, the control unit 30 is connected to the traveling unit 33 including the trolley unit 5, the elevating unit 12, and other output units.

As shown in FIG. 3, the laser type photoelectric switch 20 includes a head unit 23 including a light projecting unit 21 and a light receiving unit 22, a light projecting circuit 24 connected to the light projecting unit 21, and a light receiving unit. And a light receiving circuit 25 connected to. The light projecting circuit 24 and the light receiving circuit 25 are connected to a light projecting and receiving control circuit 26. Next, the operation of the above embodiment will be described with reference to FIGS.

At the time of loading the plate material, first, the trolley portion 5 is driven to move the loader 3 onto the material cart 1 on which the material plate material W to be loaded is loaded. Next, the hoist 10 of the elevating part 12 is driven to lower the suction device 9, and the holding pad 15 holds the plate material W by suction. From this state, the suction device 9 is raised by driving the elevating part 12. On the other hand, by driving the light projecting circuit 24 of the photoelectric switch 20, laser light is projected from the light projecting unit 21 to the end surface of the plate material that rises together with the suction device 9.

Now, as shown in FIG. 4, it is assumed that only one sheet W is taken out by the holding pad 15. In this normal state, when the holding pad 15 raises the plate material W in the order of (a) → (b) → (c), in the states of (a) and (c), the laser light 20a from the photoelectric switch 20 1 Does not irradiate the plate material end surface Wa and does not reflect the laser light, but when the plate material W faces the photoelectric switch 20 (b), the laser light 20a from the photoelectric switch 20 irradiates and reflects the plate material end surface Wa. Then, the reflected laser light is received by the light receiving portion 22 (FIG. 3) in the photoelectric switch 20. As a result, in the case of FIG. 4, the laser light receiving state in the light receiving circuit 25 of the photoelectric switch 20 becomes as shown in (d). Here, the part corresponds to (a), the part corresponds to (b), and the part corresponds to (c).

Next, as shown in FIG. 5, it is assumed that _two plate materials W ₁ and W ₂ are taken out by the holding pad 15 and the end surface W ₂ a of the plate material W ₂ hangs down. In this case, when the plate members W ₁ and W ₂ rise together with the holding pad 15, the plate member end faces W ₁ a in the states (a) and (c) where the plate member end faces face the photoelectric switch 20 respectively. And W ₂ a respectively reflect the laser light, but in the state shown in (b) where the gap 28 between the end faces W ₁ a and W ₂ a of each plate material faces the photoelectric switch 20, the laser light 20 a from the photoelectric switch 20 is emitted. Does not reflect. Therefore, in this case, the light receiving state by the photoelectric switch 20 is as shown in (d). In this (d), the part corresponds to (a), the part corresponds to (b), and the part corresponds to (c).

Next, as shown in FIG. 6, two plate members W are held by the holding pad 15.₁And W₂Is taken out, and each plate material W₁And W₂Suppose that they were in close contact with each other due to the oil content that exists between the two plate materials. In this case, each plate material W₁And W₂It is considered that a minute gap s due to the intervening oil is formed between them. In this state, each plate W together with the holding pad 15₁And W₂Rises, the plate material W₁And W₂Each end face W of₁a and W₂In the states (a) and (c) where a faces the photoelectric switch 20, respectively, the end surface W of each plate material is₁a and W₂The laser light is reflected at a. In addition, each plate material W₁And W ₂ In the state (b) in which the gap s between them and the photoelectric switch 20 face each other, the laser light 20a from the photoelectric switch 20 enters into the gap s, and the laser light is not reflected from this gap s portion. As a result, the light receiving state at the light receiving portion 22 of the photoelectric switch 20 becomes as shown in (d). In this (d), the part corresponds to (a), the part corresponds to (b), and the part corresponds to (c).

From the above, when only one material plate is lifted, one peak value () appears as shown in FIG. 4D, and when two or more material plates are lifted. In this case, two or more peak values (,) appear, as shown in FIG. 5 (d) and FIG. 6 (d). Therefore, it is possible to detect the number of material plates from the light receiving state of the light receiving circuit 25 of the photoelectric switch 20.

In this case, since the number of plate materials is detected in parallel with the lifting operation of the material plate material by the holding pad 15, the cycle time is shortened. Further, since the laser beam is projected from the direction of the end face of the plate to detect the number of plates, the number of plates can be easily detected regardless of the adhered state of the plates.

[0019]

[Effect of the device]

 According to the plate number detecting device of the present invention, the number of plates is detected by transmitting and receiving light to and from the end face of the plate, and the number of plates is detected. Therefore, the cycle time can be shortened and the number of plates can be easily detected. ..

[Brief description of drawings]

FIG. 1 is a schematic front view of a plate material carrying-in system according to an embodiment of the present invention.

FIG. 2 is a schematic block diagram of a control unit thereof.

FIG. 3 is a schematic block diagram of a laser photoelectric switch.

FIG. 4 is a diagram for explaining the operation of the embodiment.

FIG. 5 is a diagram for explaining the operation of the embodiment.

FIG. 6 is a diagram for explaining the operation of the embodiment.

[Explanation of symbols]

 3 loader 15 holding pad 20 laser type photoelectric switch 21 light emitting unit 22 light receiving unit 26 light emitting and receiving control circuit

Claims (1)

[Scope of utility model registration request] 1. A plate material number detecting device for detecting the number of plate materials taken out by a plate material adsorbing / holding section capable of moving up and down from a plate material stacking section on which a plurality of plate materials are stacked. It is provided with a light emitting / receiving unit that is arranged on the side of the plate that is taken out and moves up and down, and that emits and receives light to and from the end face of the plate, and a detection unit that measures the light receiving state of the light emitting and receiving unit and detects the number of plates. Plate number detector.