JPH08268585A - Hoisting device of stacked synthetic resin sheet - Google Patents

Abstract

PURPOSE: To provide a suspending device which can reliably hoist one by one synthetic resin sheets stacked in large numbers. CONSTITUTION: Rotary shafts 5 on which plural eccentric cams 10 whose phase is alternately shifted by 180 degrees are installed at intervals are arranged in plural rows in parallel under a raising-lowering frame 4, and are received by bearing so as to be drivable in rotation, and slide boxes 11 are engaged with and suspended by the eccentric cams 10 so as to be raised and lowered, and sucking cups 16 are installed under the slide boxes 11 through cup installing shafts 14 suspended so that a slight raising-lowering movement becomes possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for lifting a large number of sheets made of synthetic resin such as thermoplastic resin in a stacked state from the top one by one.

[0002]

2. Description of the Related Art Conventionally, in the above-mentioned apparatus, the uppermost sheet is adsorbed by a suction adsorption method using a large number of suction cups and the like, and this sheet is lifted and picked up one by one. When a large number of sheets are stacked, the upper and lower sheets are stuck to each other due to compaction, and the sheets are lifted in a state of being stacked with two sheets and three sheets, which often causes a trouble in the subsequent process. In order to prevent such lifting of sheets with two or three sheets stacked, a method of rubbing the end face portion of the sheet with a brush and dropping the second and subsequent sheets, an air nozzle toward the end face of the sheet Is arranged and the first and second sheets are separated by spraying air, and the suction cups corresponding to the four corners of the sheet among the many arranged suction cups are lifted several tens of millimeters in advance to be the first sheet. And the second sheet
A method of making air easier to enter between the trays and dropping the second and subsequent sheets, and a method of raising and lowering the suction cups corresponding to the four corners several times by the method of the above item are implemented.

However, none of these methods is perfect, and in the case of the item, the end face portion of the sheet can be separated but the central portion of the sheet cannot be removed.
In the case of item (1), since the end face hangs down and hinders the introduction of air, the sticking of the central portion of the sheet cannot be peeled off similarly to item (1). As in the case of the item, the sticking of the central part of the sheet cannot be peeled off and the item 2 is still available.
It was impossible to completely prevent the sheet from being picked up by one sheet or three sheets. The present invention has been made in view of the above problems, and provides a hoisting device for a stacked synthetic resin sheet that can reliably hoist a plurality of synthetic resin sheets stacked one by one. With the goal.

[0004]

SUMMARY OF THE INVENTION To achieve the above object, a hoisting device for stacked synthetic resin sheets according to the present invention has a 180.degree. A plurality of eccentric cams, which are offset from each other, are mounted at intervals to make the rotary shafts parallel to each other in a plurality of rows and to be rotatably driven so as to support a slide box. The suction cup is attached to the lower part of the cup via a cup mounting shaft that is hung so that it can be slightly moved up and down.

[0005]

According to the present invention, by adopting the above-mentioned solution means, the suction cups are stacked and pressed against the uppermost portion of the synthetic resin sheet and sucked and sucked. Due to the displacement, the suction cup corresponding to the peripheral edge of the sheet is pulled up, the suction cup corresponding to the peripheral edge of the uppermost sheet is pulled up, and the peripheral edge of the uppermost sheet is raised. Air enters between the first sheet and the second sheet. After that, the peripheral edge of the sheet is gradually closed, while the second suction cup from the outside is pulled up to further separate this portion of the first sheet and the second sheet and to this portion. Move the air. By performing this operation a few times, the first sheet and the second sheet
The air that has entered between the sheets is sequentially moved toward the central portion to peel off the sticking on the entire surface of the sheet. After that, by raising the elevating frame, only the first sheet is reliably lifted.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 and 2, an elevating frame 4 is fixed to the lower end of a piston rod 3 of a cylinder 2 mounted downward on a fixed frame 1. The lifting frame 4
A rotary shaft 5 extending in the left-right direction is rotatably supported in the lower part of the shaft in parallel with the front-back direction at appropriate intervals via a bearing 6.6, and one end of the rotary shaft 5 is connected to the lifting frame. It is connected via a coupling 9 to a rotary shaft of a drive motor 8 attached to the lower part of the frame 4 via a bracket 7. A circular eccentric cam 1 is attached to each of the rotary shafts 5.5.
0.10 are fixed at appropriate intervals, and the eccentric cams 10.10 are attached in a state of alternately projecting in the up and down direction with respect to the rotating shaft 5 with a 180 ° phase shift.

Each eccentric cam 10 has a slide box 1
1 is lifted up and down so as to be able to move up and down, and the height position of each slide box 11 is arranged so that the height is alternately repeated. (Refer to the height level in FIG. 1) A guide rod 12 is fixed to the upper part of the slide box 11, and the guide rod 12 is inserted into a bush 13 fitted to the elevating frame 4 so as to be able to move up and down. However, the slide box 11 is configured to move up and down by the rotational displacement of the eccentric cam 10. At the bottom of each slide box 11, a cup mounting shaft 14 is suspended so as to be able to move up and down by a slight distance, and at the lower end of the cup mounting shaft 14, a suction hose 15 communicating with a suction mechanism (not shown) is attached. The cup 16 is fixed. A coil spring 17 is wound around the cup mounting shaft 14 (between the lower end of the slide box 11 and the upper end of the suction cup 16) so that the cup mounting shaft 14 is normally pushed downward. Further, as shown in FIG. 3, the suction cups 16.16 are arranged in a so-called hanging pine pattern in which suction cups (hatched) 16 at high positions and suction cups (outlined) 16 at low positions are alternately positioned. There is.

Next, the cylinder 2 is actuated in the state shown in FIGS. 1 and 3 for explaining the operation of the above-structured one, and the elevating frame 4 is lowered to cause the uppermost surface of the stacked synthetic resin sheet (not shown). Press the suction cup 16.16 onto. This pressing is in the lower position of the suction cup 16.1
6 first comes into contact with the upper surface of the sheet, the descending is stopped, and the suction cup 1 is at a high position while the coil spring 17 is being crimped.
6.16 also comes into contact with the upper surface of the sheet and stops descending, and when the coil spring 17 is slightly compressed, the operation of the cylinder 2 is stopped and the pressing is finished. Next, the suction hose of the suction cup 16
The suction sheet (15) and a suction mechanism (not shown) communicate with each other, and the uppermost sheet is sucked by the suction cup 16.16.

Next, the drive motor 8 operates to rotate the rotary shaft 5. The rotation of the rotary shaft 5 raises the suction cups 16.16 at both end positions of the rotary shaft 5, and the suction cups 16.16 inside the suction cups 16.16 are lowered to be sucked by the suction cups 16.16. The seat is shown in Figure 4.
As in the first step, both ends of the first sheet S1 are lifted to separate both ends from the second sheet S2, and air is introduced into this part. Then, suction cups 1 at both ends
6.16 lowers both ends of the sheet S1 to move the sheet S2
The ends of the sheets S1 and S2 are closed, while the suction cup 16.16 inside the sheets S1 and S2 is lifted and the air introduced in the first step as shown in the second step of FIG. Is trapped and moves inward. Further, as the rotating shaft 5 continues to rotate, air is spread over the entire area between the first sheet S1 and the second sheet S2 as shown in the third step of FIG. 4, both sheets S1, The sticking of S2 is peeled off. After that, the cylinder 2 operates in reverse and the lifting frame 4
Is lifted to lift only the first sheet S1 together with the suction cup 16.16 and move to the next step. By repeating the above operation, the stacked synthetic resin sheets are reliably lifted one by one and transferred to the next step.

[0010]

As is apparent from the above description, the present invention alternately raises and lowers a large number of adsorption cups adsorbed on the uppermost part of the stacked synthetic resin sheets so that the first sheet and the second sheet are adsorbed. Air is blown across the entire area between the eye sheets to separate the two sheets from each other, and then the suction cups are lifted to lift the first sheet. The sheets can be surely lifted one by one.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a view on arrow AA in FIG.

FIG. 3 is a plan view showing the arrangement of suction cups.

FIG. 4 is a process explanatory view showing a process of peeling the adhesion of the sheet.

[Explanation of symbols]

 4 Lifting frame 5 Rotating shaft 10 Eccentric cam 11 Slide box 14 Cup mounting shaft 16 Suction cup

Claims (1)

[Claims] 1. A rotary shaft 5 in which a plurality of eccentric cams, which are alternately shifted in phase by 180 degrees, are attached to a lower portion of an elevating frame 4 which is arranged so as to be vertically elevating, and a plurality of rows of which are parallel to each other, and A rotatably driven bearing is provided, and a slide box 11 is suspended from the eccentric cam 10 so that the slide box 11 can be moved up and down. Suction cup 16
Lifting device for stacked synthetic resin sheets, characterized in that