JPS587587B2 - Sheet conveyance sorting device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a sheet conveying and sorting device.

Conventionally, various devices are known that transport paper, film, etc. (hereinafter referred to as sheets) on a conveyor and sort them in different directions according to their classification (for example, distinguishing between good and defective products).
All of these have mechanically moving parts, and due to the weight of the moving parts, responsiveness at high speeds is poor, and contact between the moving parts and the sheet being conveyed is unavoidable, which can cause minute scratches on the surface or end surface. This method has various drawbacks, such as not being suitable for conveying or sorting sheets that are not permitted, and also making delivery of curled sheets unstable and lacking in reliability.

The present invention improves these drawbacks and provides a sorting device that does not have any mechanically movable parts, that sorts sheets in a predetermined direction without contact, and that can reliably transfer even strongly curled sheets. be.

In the invention of the present application, in a device in which sheets are supported and conveyed by a pair of plural belts, at a branch point of a distribution section,
A pair of air nozzle pipes with compressed air blowing holes are arranged on the upper and lower sides of each belt, and fixed blowing chambers are provided inside the above pair of belts to blow out compressed air in each conveying direction. This allows the sheet to be pressed against the belt and distributed to the chamber without contact, and it does not have any mechanically moving parts and does not cause wrinkles or scratches on the sheet. Therefore, it is possible to obtain an apparatus that can safely and reliably distribute sheets into a chamber without contact even in the case of sheets having the following properties.

To explain the figure, several rows of a pair of belts 2 and 3 are arranged in parallel, and a sheet 1 is supported and conveyed between them.
One of the belts 3 changes its direction by a roller 16 located at a branch point in the distribution section, and near the branch point, air nozzle pipes 9 and 10 are arranged on the upper and lower sides of the belts 2 and 3, and the air nozzle pipe 9 is placed on the belt side. Air outlet 11 toward
The nozzle pipe 10 also has a blowout hole 12.

About 3 to 4 crrL downstream from the branch point, belt 2,
3, air blow holes 7, facing the belts 2, 3, respectively.
A fixed blowing chamber 6 having 8 is provided.

Transfer belts 4 and 5 are provided behind the fixed blow-off chamber via rollers 17 and 18, respectively.

The nozzle pipes 9 and 10 are each provided with valves 14 and 15 for controlling the inflow of compressed air. It is controlled by a sorting detector 13.

To explain the operation of the present invention, a detector determines the timing in which direction should be distributed at a branch point based on a preset external switching signal, and the valve 7
4.15 control.

As shown now, when a sheet 1 is to be routed to the lower belt 3, the detector 13 causes the valve 14 to be opened and the valve 15 to be closed.

Therefore, compressed air flows into the air nozzle pipe 9, and the blowout hole 1
1 and pushes the sheet 1 downward in the diagram, the sheet is distributed in the direction of the belt 3, and is pressed against the belt 3 by the compressed air from the blow-off hole 8 of the fixed blow-out chamber, and then passes through the transfer belt 5. It gets between the belts 3 and is conveyed.

In the opposite case, the valve 15 is opened and the valve 14 is closed, and the nozzle pipe 1
Compressed air flows into the chamber 6, and the sheet 1 is distributed upward in the figure by the compressed air blown out from the blow-off hole 12, and is pressed against the belt 2 by the compressed air from the blow-off hole 7 of the chamber 6, and advances to the transfer belt 4. and the belt 2 and are conveyed.

Since the present invention has the above-mentioned configuration, it does not have any mechanically moving parts during sorting, has good responsiveness even at high speeds, and has no contact parts with the sheet, which causes scratches on the surface edge. Moreover, since the sheets are pressed by compressed air from a fixed blowing chamber, even sheets with strong curls can be sorted and passed through a device that ensures reliable delivery.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing FIG. 1 viewed from above. Explanation of symbols, 1... Seat, 2, 3... Belt, 4, 5
...Delivery belt, 6...Fixed blowout chamber, 7
．． 8... Air blowing hole of fixed gate, 9, 10... Air nozzle pipe, 11, 12... Air blowing hole of air nozzle pipe, 13... Detector, 14.15... Valve of air nozzle pipe, 16 , 17.18... Sorting roller.

Claims (1)

[Claims] 1. A pair of air nozzle pipes with compressed air blowing holes are installed on the upper and lower sides of each belt at the branching point of the sorting section for sheets that are supported and conveyed at regular intervals by a pair of multiple belts. The sheet conveying and sorting device is characterized in that fixed blowing chambers are provided inside the pair of belts for blowing out compressed air in respective conveying directions, and the sheets sorted to the chambers are pressed against the belts. Sheet conveyance and sorting device.