JPS61882A - Paper sheet feed device - Google Patents

Abstract

PURPOSE:To prevent the generation of the double feed or the misfeed of paper sheets by giving control to the vertical movements of a hopper where the paper sheets are put in a stacked state so that the sheet of the highest position of the stacking is kept at the prescribed height. CONSTITUTION:A microswitch 19 is kept on while the height of stacked paper sheets 2 is kept at a prescribed level. The height of the sheets 2 is reduced as the feed action of the sheets 2 proceeds and accordingly the position of a roll 13 is also lowered at a pickup lever 16. A sensor lever 18 is also lowered in response to the movement of the roll 13. When the height of the sheets 2 is reduced down to a prescribed level, the switch 19 is turned off by the lever 18. Thus a motor 6 is driven and a hopper 1 moves up via an X link 3. The height of the sheets 2 increased up to a prescribed level with the rise of the hopper 1. Then the switch 19 is turned on to stop the drive of the motor 6. In such a way of control, the heighest position of the stacking of the sheets 2 is kept at a fixed level on the hopper 1.

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a paper sheet supply system that automatically dispenses and supplies paper sheets set in a polymerized state on a supply stand (hopper) one by one. Concerning improvements to equipment.

In particular, it is designed to prevent paper misfeeds and double feeds, and to reliably feed each sheet of paper.

<Prior art> In a paper sheet feeding device used in an optical character reader, etc., which feeds sheets stacked on a hopper one by one, the position of the sheets stacked on the hopper is fixed. If the position is too high or too low from the predetermined position, double feeds or misfeeds occur frequently, and reliability is lacking in terms of reliably feeding a single sheet i.

<Purpose> The present invention aims to solve the above problems, and its first purpose is to control the vertical movement of a hopper in which paper sheets are placed in a stacked state using a driving means. The purpose is to control the position of the topmost stacked sheets to be maintained at a predetermined height, thereby preventing the occurrence of tuple feeds and misfeeds.

The second objective is to control the drive of the hopper, and in particular, it is possible to accurately position the hopper at a certain position when stopping the hopper.

<Example> FIG. 1 is a diagram showing the configuration of a paper sheet feeding device of the present invention, in which 1 is a hopper (supply stand) on which paper sheets 2 are stacked;
The hopper 1 is raised and lowered by an X link 3.

The central intersection of the X-risk 3 is rotatably supported by a shaft 4A, and the upper end of the link piece 3A constituting the X-link 3 is pivotally supported by a mounting piece 5 provided on the bottom wall of the hopper 1. At the same time, the lower end of this link piece 3A is pivotally supported by a slider 8 which is screwed into a feed cine shifter rotated by a motor 6.

On the other hand, a rotatable roller 9 is attached to the upper end of another link piece 3B constituting the X link 8, and the roller 9 is placed on a wedge-shaped guide rail 10 attached to the bottom wall of the hopper 1. At the same time, the lower end of the link piece 3B is pivotally supported by a mounting piece 12 provided on the base plate 11 on which the motor 6 is mounted.

When the rider 8 moves on the feed screw 7 and now moves in the direction of arrow B, the X link 3 causes the hopper 1 to move upward. That is, when the lower end of the link piece 3A moves in the direction of arrow B, the roller 9 at the upper end of the link piece 3B also moves on the guide rail 10 in the direction of arrow B, thereby raising the hopper 1.

Conversely, when the motor 6 is driven in the opposite direction, the lower end of the link piece 3A and the upper end of the link piece 3B move in the direction of arrow A, thereby lowering the hopper 1.

4B is a torsion spring installed between the link pieces 3A and 3B of the X link 3 via the shaft 4A.
It acts to prevent rattling during downward movement and movement of the feed screw 7.

13 is a pickup roller that sequentially picks up the paper sheets 2 stacked on the hopper 1 from the top; 14 is a feed roller that sends the paper sheets 1 picked up by the pickup roller 18 onto a traveling path; and 15 is a reverse roller disposed below the feed roller 14, and functions to separate the paper sheet 2 picked up by the feed roller 14 and reverse roller 15 into one sheet.

The feed roller 14 and reverse roller 15 are attached to drive shafts +4A and +5A, respectively, and the drive shaft +4A is connected to a drive source to rotate the roller 14 in the feed direction of the arrow. Further, the drive shaft 15A is connected to the drive source and is rotated in a direction opposite to the rotation direction of the roller I4.
15 in the direction of the arrow.

On the other hand, the pickup roller 1B is rotatably attached to the tip of a pickup lever 16, and the other end of the pickup lever 16 is loosely supported by the drive shaft 14A.

Therefore, the pickup roller 13 is placed on top of the stacked sheets 2 due to its own weight.

Further, the pickup roller 13 is connected to the feed roller 14.
The pick-up roller 13 is also rotated in accordance with the rotation of the feed roller 14, and performs a pick-up operation.

Reference numeral 18 is a sensor lever located above the pickup lens <-16, and the sensor lever 18 is the shaft ++
It is rotatably supported by 3A, and the tip is connected to micro switch 1.
It is placed on the operating piece +9A of No.9.

The sensor lever 18 has a protruding piece 18B protruding toward the pickup lever 16 at a position near the support shaft 18A.
The tip of this protruding piece 18B is in contact with the upper surface of the pickup lever 16. That is, on the microswitch 19 side of the sensor lever 18, the spring 2o always urges the lever 18 in the direction of the microswitch 19, and the protruding piece 18B is pressed against the upper surface of the pickup lever 16.

Therefore, in response to the pickup lever 16 moving up and down around the drive shaft +4A, the sensor lever 18 also rotates around the support shaft +8A, and the up and down movement of the lever 18 controls the microswitch 19 to turn on and off. Ru.

That is, the sensor lever 18 is the pickup lever 1.
This functions to magnify the vertical movement of the microsinch I9i and controls the ON-OFF state of the microsinch I9i.

This is because when the height of the stacked paper sheets 2 is at a predetermined position, the microswitch 19 is maintained in the ON state, and as the paper feeding operation progresses, the height of the stacked paper sheets 2 decreases, and accordingly Then, the roller 13 side of the pickup lever 16 also descends. The sensor lever 18 also responds to this operation of the pink-up lever 16, and is rotated clockwise about the axis +8Ai fulcrum.

Thereafter, when the height of the paper sheet 2 falls to a predetermined position, the sensor lever 18 presses the operating piece +9A of the microswitch 19, and the microswitch 19 is pressed by the sensor lever 18.
becomes OFF. OF this micro switch 19
In response to F, the motor 6 is driven, and the hopper 1 is moved upward via the X IJ link 3.

When the height of the stacked paper sheets 2 rises to a predetermined position due to the rise of the hopper 1, the micro switch 19 is turned on via the pickup lever 6 and the sensor lever 18e.
The motor 6 is operated and the drive of the motor 6 is stopped.

Therefore, the position of the top of the paper sheets 2 stacked in the hopper 1 is maintained constant by the control described above.

By the way, FIG. 2 shows a time chart for the operations of the microswitch 19, motor 6, and hopper 1. In particular, in order to accurately position the hopper 1 at the proper position,
The drive control of the motor 6 has been improved.

That is, ( ] in FIG. 2 is the operating signal of the microswitch 19, (2) in FIG. 2 indicates the operation of the motor 6, and (3) in FIG. 2 indicates the moving position of the hopper 1. There is.

Initially, the hopper 1 of the device is set to the lowest position by the motor 6, and in this state it is in a standby state, and then when a start instruction is given for paper feeding operation, +V is applied to the motor 6 and the X link 3 is activated. Driven to rise.

A hopper with paper sheets 2 stacked thereon is driven by a motor 6.
1 rises one after another, and when the top of the stacked sheets 2 reaches the height set by the position of the microswitch I9, the microswitch 19 is turned from the OFF state to the ON state via the pickup lever 16 and the sensor lever 18. Can be switched.

In response to the ON signal of the microswitch 19, a timer means (not shown) is operated, and -vl is applied to the motor 6 for a certain period of time to, causing the motor 6 to operate in reverse.

This reversal of the motor 6 for a certain period of time prevents the hopper 1 from exceeding the desired set height and stopping due to inertia generated when the hopper 1 is raised.

That is, when the motor 6 is driven to raise the hopper 1 and the motor 6 is immediately stopped in response to the ON signal of the microswitch I9, the hopper 1 is raised as shown by the dotted line (C) in FIG. 2 (3). Due to its quality, it is stopped above the desired set height.

In order to prevent this setting error, the micro switch 19
By rotating the motor 6 in the reverse direction for a certain period of time and then stopping it in response to the ON signal of It is designed so that it can be set accurately at the desired height.

After that, the paper feeding operation of the paper sheets 2 is started, and when the top position of the stacked paper sheets 2 falls below a predetermined position and the microswitch 19 is turned off, the motor 6 is driven again to raise the hopper 1. . When the p microswitch 19 is turned ON again by this upward movement, the motor 6 is maintained at =■ for a certain period of time.
is applied and then stopped.

During paper feeding operation, the above operation number is repeated, and hopper 1 is operated as shown in Fig. 2 (
It is held at the desired height as shown in 3).

Since the top position of the sheets 2 stacked in the hopper l, that is, the pick-up position of the pick-up roller 13, is always set at a predetermined position in this way, double feeds and misfeeds can be prevented.

<Effects> As described above, in the present invention, the uppermost part of the paper sheets 2 stacked in the hopper 1 is always held at a predetermined position during paper feeding in response to the output of the detection means (microswitch). By controlling the motor that moves the hopper 1, the pick-up position of the pick-up roller 13 can always be set at a predetermined position, thereby preventing the occurrence of double feed and misfeed as in the past, and providing a highly reliable device. can.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of the apparatus of the present invention, and FIG. 2 (1). (2) and (3) are time charts showing the operation of the device. 1: Hopper, 2: Paper leaf, 3: X link, 6: Motor,
13: Pickup roller, 14° feed roller, 15.
Reverse roller, 16: Bit assop lever, 18: Sensor lever, 19: Micro switch. Agent Patent attorney Aihiko Fuku (and 2 others) Figure 1 Figure 2

Claims (1)

[Claims] 1. In a paper sheet feeding device that sequentially picks up paper sheets set in a stack on a hopper, which is a feeding table, from the top with a pick-up roller and feeds the sheets one by one onto a travel path. , a hopper drive mechanism including a drive source such as a motor that moves the hopper up and down, and a detection means for detecting whether the top of the sheets stacked in the hopper is at a predetermined position. raising the hopper by a drive mechanism in response to the detection by the detection means that the top of the stack of sheets is not at the predetermined position, and in response to the detection by the detection means that the top of the stack of sheets is at the predetermined position. A paper sheet feeding device characterized in that the raising operation of the drive mechanism is stopped. 2. A patent claim characterized in that in response to the detection of the detection means being at the predetermined position, the motor, which is the drive source of the drive mechanism, is driven for a certain period of time in a direction opposite to the drive direction during the upward movement. The paper sheet feeding device according to item 1.