JPS59114228A - Paper feed device - Google Patents

Abstract

PURPOSE:To make it possible to smoothly feed out papers, by providing such an arrangement that the air pressure of an air nozzle is detected, and a fork is controlled when the detected pressure is out of a predetermined range, so that the papers are fed to the main vacuum chamber side. CONSTITUTION:Air is blown in the direction E from a pressure supply device 24 through a nozzle 13 onto the papers 17 in their standing direction, and therefore, gaps are formed between the papers 17. A pressure switch 24 detects the air pressure of the nozzle 13, and feeds an electrical signal to a control section 26 when the air pressure is out of a predetermined range. The control section 26 operates a drive motor 21 in accordance with the signal so that the papers 17 are controlled to be pressed toward an endless belt 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper sheet feeding device, and more particularly to a paper sheet feeding device in a paper sheet processing device for processing postcards, cards, forms, etc.

A conventional paper sheet feeding device is shown in Fig. 1.

Main vacuum chamber 1. It includes an auxiliary vacuum chamber 2 and an air nozzle 3, the main vacuum chamber 1 and the auxiliary vacuum chamber 2 are connected to a vacuum pump (not shown), and the air nozzle 3 is connected to an air compressor (not shown) through a hose or the like. ing.

The main vacuum chamber 1 and the auxiliary vacuum chamber 2 are provided with ventilation holes 1/ and 2/ of appropriate sizes. An endless belt 4' is provided in sliding contact with the front surface of the main vacuum chamber 1, and this endless belt 4' is connected to a drive roller 5.
It is hooked by idlers 6a, 6b, and 6c, and is caused to travel at a constant speed in the direction of the arrow υ by drive rollers 5. Furthermore, this endless belt 4 is provided with an air permeable hole 4' having the same shape as the hole 1' on the front surface of the main vacuum 1.

When the air permeable hole 4' of the endless belt 4 and the air permeable hole 1' of the main vacuum chamber 1 coincide, the paper sheet 7 is attracted to the surface of the endless belt 4 by negative pressure (vacuum pressure) and is sent out. This feeding device 6 is provided with an auxiliary vacuum chamber 2 and an air nozzle 3 in order to prevent excessive feeding in which two or more sheets are fed out at the same time due to mutual friction between the sheets. In other words, negative pressure is constantly applied to the auxiliary vacuum chamber 2 through the air permeable holes 2' on the front surface 9, and paper sheets 7 that come into contact with the endless belt 4 are fed by friction with the endless belt 4 in areas other than the air permeable holes 4'. The air nozzle 3 has the function of suctioning and holding the paper sheet 7 in place so that it does not come out.
It has the function of creating gaps between sheets of paper, reducing mutual friction between the sheets, and preventing excessive feeding. Paper sheets 7 arranged side by side in an upright position are pushed by a fork 8 in a direction perpendicular to the sliding surface of the main vacuum chamber l. The fork control lever 9, which is provided in the vicinity of the auxiliary vacuum chamber 2 and in a position where it is always in contact with the frontmost part of the filter paper sheet 7 pushed forward by the fork 8, receives the pressure of the paper sheet pushed forward by the fork 8; A microswitch 10 arranged in parallel with the fork control lever 9 detects the uftjJf of the fork control lever.

In the paper sheet feeding device described above, the paper sheet 7 is pressed against the main vacuum chamber 1 side by a fork 8 with a certain amount of force, the pressure is applied via the fork control lever 9, and the amount of displacement is controlled by the micro switch 10. The paper sheet 7 was transferred to the main vacuum chamber 1 side without detecting this and controlling the drive device (not shown) of the fork 8. Paper quality (hardness,
thickness.

In a device that continuously feeds a mixture of paper sheets of various weights, etc., it is necessary to detect the pressure of sheets of average hardness as the pressure detection standard. I was in a state where I couldn't do anything. This means that when there are many materials that are harder than the average hardness, the oak control lever 9 is always pressed, as shown in FIG. Even though the fork control lever is in the same condition, it is difficult to tighten the fork control lever afterwards, resulting in a gap (a), which results in intermittent feeding, lowering the processing speed, and causing poor feeding posture.

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper sheet feeding device that eliminates the above-mentioned drawbacks of the conventional paper sheets and allows paper sheets to be fed out smoothly.

According to the present invention, there is provided a main vacuum chamber having a sliding surface with a through hole on the front surface, and an endless belt that slides on the outside of the sliding surface of the main vacuum chamber and has a hole at a position opposite to the through hole. a fork that pushes paper sheets in an upright position in a direction perpendicular to the sliding surface of the main vacuum chamber; an auxiliary vacuum chamber that is arranged in parallel with the main vacuum chamber and has a through hole in the front; In a paper sheet feeding device comprising an air nozzle that blows pressurized air between the air nozzles and a pressure supply device communicating with the air nozzle, there is provided a means for detecting the air pressure of the air nozzle, and a means for detecting the air pressure outside a predetermined range. There is provided a paper sheet feeding device characterized in that it has a means for detecting this, controlling the fork, and transferring the paper sheet to the main vacuum chamber side.

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 3 (aJ, (b)) shows the configuration of an embodiment of the present invention.

In FIGS. 3(a) and 3(b), the paper sheet feeding apparatus of this embodiment is provided with a main vacuum chamber 11 facing paper sheets 17 and an auxiliary vacuum chamber 12. The first
As shown in the figure, it has a sliding surface with a through hole in the front, and the auxiliary vacuum chamber 12 also has a through hole in the front.

These vacuum chambers are connected to a vacuum pump (not shown) through a hose or the like, so that a desired suction force can be obtained. The main vacuum chamber 11 is provided with an endless belt 14 that is in sliding contact with the sliding surface on the front surface thereof and has holes at positions opposite to the through holes. This endless belt 14 includes a driving roller 15 and idlers 16a and 16b.

16C, and is rotated in the direction of arrow B by a % drive row 215.

The fork 18 is configured to press the paper sheet 17 against the endless belt 14, so that the frontmost part of the paper sheet 17 is always in contact with the endless belt 14. This fork 18 is attached to a chain 2o hooked on gouris 19a and 19b.

A pressing force is obtained in a direction perpendicular to the sliding surface of the main vacuum chamber, that is, in the direction of arrow C. Drive motor 21
7-ri 2 so as to rotate the pulley 19a in the direction of the arrow.
3a, 23b and the belt 22.

Furthermore, this embodiment has an air nozzle 13, which uses a pressure supply device 24 to blow air in the direction of the arrow E on the paper sheets 17 in an upright position to create a gap between each group of paper sheets. It has the function of reducing the mutual friction force of type 17 and preventing excessive feed. The pressure switch 24 detects the pressure of the air nozzle 13, and converts it into an electrical signal when the pressure falls outside a predetermined range. This electrical signal is sent to a control section 26 consisting of a microprocessor or the like.

Based on this signal, the control unit 26 operates the drive motor 21 and controls it to press one paper sheet 17 in the direction of the endless belt 14.

This feeding device normally feeds paper sheets one by one using an endless belt, but there are cases where paper sheets in an upright position get caught and cannot be fed out continuously and smoothly.

In this case, in this embodiment, when a gap occurs in the paper sheets near the air nozzle as shown in FIG. 4(a), the pressure decreases.
When a certain pressure is reached, the pressure switch 25 shown in FIG. 3 is activated and supplies the signal to the control unit 26. The control unit 26 controls the drive motor 21 that drives the fork 18, starts the fork 18 toward the main vacuum chamber, transfers one paper sheet in the direction of arrow C, and further moves the paper sheet group as shown in FIG. 4 (bl). When the gap is clogged and the air nozzle pressure rises to a certain level, the pressure switch 25 stops the movement of the cutting fork.

In this way, the paper sheets 17 are appropriately pressed against the running surface of the endless belt 14, so that the main vacuum chamber 11 and the endless belt 1
By the action of 4, it is sent out one by one. Therefore, in this embodiment, the paper sheets 17 near the air nozzle 3 are
Since this is repeated as shown in (bl), smooth supply is possible.

As explained above, the present invention has the advantage that even irregularly mixed sheets of different paper qualities can be fed out continuously and smoothly.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional paper sheet feeding device. Figure 2 is a diagram showing the state of relatively hard paper sheets in a conventional feeding device; Figure (al
11 is a diagram showing a state in which a gap has occurred in the state of paper sheets, and FIG. Vacuum chamber, 12... Auxiliary vacuum chamber, 13... Air nozzle, 14...
Endless belt. 15... Drive roller, 16a, 16b, 16c
...Idler, 17...Paper leaf, 18
...Fork, 19a, 19b...Pulley, 20...Chain, 21...Drive motor, 22...Bell l-, 23a, 23b
...Boo 1c 24...Pressure supply device,
25...Pressure switch, 26...Control unit. Agent Patent Attorney Susumu Uchihara Fan wo Kuni 2nd 3rd (round) Aoi 3 times (1)) 4th (of) 4th Koku Cb)

Claims (1)

[Claims] A main vacuum chamber having a sliding surface with a through hole in the front surface. An endless belt that slides on the outside of the sliding surface of the main vacuum chamber and has a hole at a position opposite to the through hole, and a paper sheet in an upright position in a direction perpendicular to the sliding surface of the main vacuum chamber. an auxiliary vacuum chamber that is arranged in parallel with the main vacuum chamber and has a through hole on the front; an air nozzle that blows pressurized air between the paper sheets; and a pressure supply device that communicates with the air nozzle. In the paper sheet feeding apparatus, the fork is controlled by means for detecting the air pressure of the air nozzle, and detecting that the air pressure is out of a predetermined range. A paper sheet feeding device characterized by having a means for transferring paper sheets to a main vacuum chamber side.