JPH06179535A - Conveyance method of sheet material - Google Patents

Abstract

PURPOSE:To separate and convey sheet material one by one completely by sucking the upper surface of the top laminated sheet material by sucking pads, and displacing both the ends of the sheet materials upward to raise them. CONSTITUTION:A conveyance device 4 is located above multiple laminated sheet materials 3..., and a base board 1 is lowered vertically. Suction pads 2 are brought into contact with the upper surface of the sheet material 3a located at the top, and air in the suction pads 2 is sucked by a pressure reducing device to make the suction pads 2 suck the upper surface of the sheet material 3a. A cylinder 6 formed at both the ends of the base board 1 is operated to raise the pipes 5a, 5b obliquely as shown by an arrow (ii), both the ends of the sheet material 3a are displaced upwards, and the sheet material 3a is projectingly-bent downwards. The base board 1 is raised vertically as shown by the allow (i) to generate layer shifting between the sheet material 3a and the sheet material 3... which are lower than the sheet material 3a, thus separating them completely, and only the sheet material 3a is conveyed to the next process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for conveying a sheet material such as a printed wiring board.

[0002]

2. Description of the Related Art A sheet material 3 formed into a thin plate such as a printed wiring board, a prepreg and a molding plate is stored by stacking a large number of sheet materials 3, 3. When the sheet materials 3 are conveyed one by one in the next process, the conveyance device 4 having the suction pad 2 is used. The transfer device 4 has, for example, a plurality of pipes 5 attached to the lower side of the substrate 1, the adsorption pads 2 are attached to the lower ends of the pipes 5, and a decompression device (not shown) for sucking air is connected to the upper end of the pipes 5. It is formed by The adsorption pad 2 is connected to a decompression device via a pipe 5, and the decompression device sucks air so that the adsorption pad 2 adsorbs under reduced pressure. The substrate 1 is connected to a cylinder provided above and is formed so as to be movable up and down.

As shown in FIG. 2 (a), the conveying device 4 is positioned above the sheet materials 3, 3, ... Stacked so that the substrate 1 is vertically lowered and the uppermost sheet material 3a. The suction pad 2 is brought into contact with the upper surface of the sheet, and the air in the suction pad 2 is sucked by the decompression device to cause the suction pad 2 to be depressurized and adsorbed on the upper surface of the sheet material 3a. Sheet material 3 by raising 1 vertically
a is separated from the sheet materials 3, 3 ...
Only the sheet material 3a is conveyed to the next process.

[0004]

However, in the sheet materials 3, 3, ... Stacked with a large number of sheets, the sheet materials 3 are in vacuum contact with each other, and in the above method, the sheet material 3a located at the top and the sheet material 3a below It was not possible to completely separate a certain number of sheet materials 3, 3, ...

The present invention has been made in view of the above points, and it is an object of the present invention to provide a method for completely separating and conveying sheet materials one by one.

[0006]

According to the sheet material conveying method of the present invention, a plurality of suction pads 2 are provided on the lower side of a substrate 1, and the sheet materials 3, 3 ... The suction pad 2 is sucked onto the upper surface of the sheet material 3a
It is characterized in that the suction pads 2a, 2b sucked to the end portions of the sheet material 3a are raised and the substrate 1 is also raised.

[0007]

The suction pad 2 is sucked onto the upper surface of the sheet material 3a located at the top of the sheet materials 3, 3, ...
Since the suction pads 2a and 2b adsorbed to the end portions of the sheet material 3a are raised, both end portions of the sheet material 3a are displaced upward and the sheet material 3a is curved downwardly convexly.
The sheet material 3a and the sheet materials 3 and 3 below the sheet material 3a due to the difference in radius of curvature between the sheet material 3a and the sheet materials 3 and 3 below.
A gap can be formed between the end portions of the sheet material 3a and the sheet material 3a, and air can be introduced between the sheet material 3a and the sheet materials 3, 3 ...

[0008]

EXAMPLES The present invention will be described in detail below with reference to examples. The transfer device 4 is provided with a plurality of pipes 5 on the lower side of a horizontal substrate 1 connected to an upper cylinder (not shown). The adsorption pads 2 are attached to the lower end of the pipe 5 and the upper end of the pipe 5 is attached to the pipe 5. It is formed by connecting a pressure reducing device (not shown) for sucking air. Further, the pipes 5a and 5b arranged at both ends of the substrate 1 are attached to the substrate 1 via the cylinder 6, and by operating the cylinder 6, the pipes 5a and 5b can be slidably moved up and down. ing. The adsorption pad 2 is connected to a decompression device via a pipe 5, and the decompression device sucks air so that the adsorption pad 2 adsorbs under reduced pressure.

The transporting device 4 as described above is positioned above the stacked sheet materials 3, 3 ..., the substrate 1 is vertically lowered, and the uppermost sheet material as shown in FIG. The suction pad 2 is brought into contact with the upper surface of the sheet 3a, and the air inside the suction pad 2 is sucked by the depressurizing device to adsorb the suction pad 2 on the upper surface of the sheet material 3a under reduced pressure. Then, the cylinders 6 provided at both ends of the substrate 1 are operated to operate the pipes 5a, 5b.
1 is obliquely raised as indicated by an arrow B in FIG. 1 (b) to displace both ends of the sheet material 3a upward and to move the sheet material 3a.
Bend downwards. Then, the substrate 1 is vertically lifted as indicated by an arrow a in FIG.
, And the sheet materials 3, 3 ... Below it are completely separated, and only the sheet material 3a is conveyed to the next step.

By displacing both ends of the uppermost sheet material 3a upward and curving the sheet material 3a in a downward convex manner as described above, the sheet material 3a and the lower sheet materials 3, 3 ... The layer deviation can be caused by the difference in the radius of curvature of the sheet material 3a and the sheet materials 3 and 3 below the sheet material 3a.
A gap can be formed between the end portions of the sheet material 3a and the sheet material 3a, and air is introduced between the sheet material 3a and the sheet materials 3 and 3 to separate the sheet material 3a from the sheet materials 3 and 3. be able to.

[0011]

As described above, according to the present invention, a plurality of suction pads are provided on the lower side of the substrate, and the suction pads are suctioned on the upper surface of the sheet material located at the uppermost position of the sheet materials laminated in large numbers, Since the suction pad adsorbed to the end of the sheet material was raised and the substrate was also raised, both ends of the sheet material were displaced upward and the sheet material was curved in a downward convex shape, so that A gap can be formed between the end portions of the sheet material and the sheet material below it due to the difference in the radius of curvature from the sheet material, and air can be introduced between the sheet materials from the gap. The sheet material can be completely separated and conveyed one by one.

[Brief description of drawings]

1A is a side view of a state before a sheet material is separated, and FIG. 1B is a side view of a state after the sheet material is separated.

FIG. 2A is a side view of a conventional example before the sheet material is separated, and FIG. 2B is a side view of the state after the sheet material is separated.

[Explanation of symbols]

 1 substrate 2 adsorption pipe 2a adsorption pipe 2b adsorption pipe 3 sheet material 3a sheet material

Claims (1)

[Claims] 1. A plurality of suction pads are provided on the lower side of a substrate, and the suction pads are sucked onto the upper surface of the sheet material located at the top of a plurality of laminated sheet materials and sucked onto the end portion of the sheet material. A method of conveying a sheet material, which comprises raising a suction pad and a substrate.