JPH03243537A - Rolling out device for paper sheet and the like - Google Patents

Abstract

PURPOSE:To get rid of such occurrences as the simultaneous rolling out of more than two sheets of paper and the kind due to the excessiveness of pressing force, and the rolling out inability of paper and the kind due to too little pressing force, by detecting pressing force which is by means of a pressing member, against pusher rollers for paper and its kind, and regulating energizing force which is by means of an elastic member, against the pressing member, according to the detection outcome. CONSTITUTION:Pressing force against pusher rollers 1a, 1b for paper and its kind 7 is measured by means of a sensor 5, and its measured outcome is outputted to a control portion 6 from the sensor 5. At this control portion 6, an actuator 4 is controlled so that pressing force against pusher rollers 1a, 1b may become proper at all times, according to the measured outcome of the sensor 5. This actuator 4 moves a spring 3 according to a control signal from the control portion 6, and regulation is made so that energizing force against a back up plate 2 by means of the spring 3, that is, pressing force against the pusher rollers 1a, 1b for the paper and its kind 7 may become proper at all times.

Description

TECHNICAL FIELD The present invention relates to a paper sheet feeding device, and more particularly to control of force in pressing paper sheets against a pusher roller for feeding paper sheets.

Prior Art Conventionally, in a sheet feeding device, a back-up plate biased by a spring presses the sheet against a pusher roller, and when the pusher roller is rotated, the gap between the pusher roller and the sheet is The paper sheets were fed out due to the frictional force.

In such conventional sheet feeding devices, a back-up plate biased by a spring presses the sheet against the pusher roller, so the spring, which only has linear characteristics, cannot handle the amount of sheets or wrinkles. Depending on the conditions, it may not be possible to apply even pressure to the pusher roller, and if the force applied to the pusher roller becomes excessive, two or more sheets may be fed out at the same time, or the pusher roller may The disadvantage of pressing is that if the force is too small, it will not be possible to feed out the paper sheets.

Purpose of the Invention The present invention has been made to eliminate the above-mentioned drawbacks of the conventional products. The purpose of the present invention is to provide a paper sheet feeding device that can eliminate the occurrence of such problems.

Composition of the Invention The paper sheet feeding device according to the present invention is a paper sheet feeding device that feeds out paper sheets by a pusher roller, and the pressing member for pressing the paper sheet against the pusher roller; an elastic member that urges a member; a detection means that detects a force when the member presses the pusher roller; It is characterized by providing an adjustment means for adjusting the forces.

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

FIG. 1 is a block diagram showing an embodiment of the present invention.

In the figure, the pusher rollers la and lb are fixed via a sensor 5 for measuring force, and a paper sheet 7 is pressed by a back-up plate 2.

Further, the pusher rollers la and lb are rotationally driven by the motor 8 so as to feed out the paper sheet 7 in the feeding direction (direction of arrow A).

The back-up plate 2 is connected to a pressing force adjustment actuator (hereinafter referred to as actuator) 4 via a spring 3 having an appropriate spring constant.

Pusher rollers 1a, 1b of paper sheets 7 0
) The pressing force is measured by the sensor 5, and the measurement result is output from the sensor 5 to the control section 6.

The control unit 6 controls the actuator 4 in accordance with the measurement result of the sensor 5 so that the pushing force against the pusher rollers la and lb is always appropriate.

The actuator 4 moves the spring 3 in response to a control signal from the control section 6, thereby varying the biasing force exerted on the back-up plate 2 by the spring 3.

Thereby, the biasing force from the spring 3 to the back-up plate 2, that is, the force for pressing the paper sheet 7 against the pusher rollers 1a, lb, is adjusted so that the force is always appropriate.

In this way, the pusher roller la of the paper sheet 7 is pressed.

When pressing 1b, the force is measured by the sensor 5, and the actuator 4 is controlled by the control unit 6 according to the measurement result,
By varying the biasing force applied to the back-up plate 2 by the spring 3, the pressure on the bushing rollers la, lb can be reduced to such an extent that two or more sheets of paper 7 may be fed out at the same time due to excessive force, or the bushing rollers la, lb may be pushed against the bushing rollers la, lb. The pressing can eliminate the occurrence of failure to feed out the paper sheet 7 due to insufficient force.

As described in detail, according to the present invention, when a member presses a paper sheet against a pusher roller, the force is detected, and according to the detection result, the pressing force by an elastic member is applied to the member. By making the adjustment, it is possible to eliminate the occurrence of simultaneous feeding of two or more sheets due to excessive pressing force, and the inability to feed out paper sheets due to insufficient pressing force.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. Explanation of symbols of main parts la, lb...Pusher roller 2...
Back-up plate 3... Spring 4... Force adjustment actuator 5... Sensor 6... Control unit 7... Paper sheet

Claims (1)

[Claims] (1) A paper sheet feeding device that feeds paper sheets using a pusher roller, which includes a pressing member that presses the sheet against the pusher roller, an elastic member that biases the pressing member, and the pressing member. a detecting means for detecting a pressing force applied to the pusher roller by the detecting means; and an adjusting means for adjusting the biasing force of the elastic member to the pressing member according to the detection result of the detecting means. Leaf feeding device.