JPS6027808A - Device for detecting thickness of paper - Google Patents

Abstract

PURPOSE:To detect te thickness of paper, by providing a paper-reduction detecting means and a paper-sheet counting means in a paper processing device of a copying machine and the like having an elevator tray. CONSTITUTION:A paper-reduction detecting means 3 detects the time when the decrease of the position of the paper at the topmost layer of paper stocked in an elevator tray 2 exceeds a preset limit. A paper-sheet counting means 4 counts the number of the sheets of paper, which are supplied in one cycle, during which the tray 2 is lifted by the detected signal from the detecting means 3, the paper is supplied, the position of the paper at the topmost layer exceeds the preset limit, and the detected signal is generated. A paper-thickness computing means 5 computes the thickness of paper based on the counted number of the sheets of paper and the preset limit. Thus the thickness of the paper can be detected.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a detection device for detecting the thickness Z of paper in a copying machine or a facsimile machine, which also serves as a paper feed and conveyance 7.

Conventional technology Thickness of one sheet of paper! It is extremely difficult to measure with large errors, and the current method of expressing it is not the thickness itself, but the weight per fixed area (1 piece), so conventional reproduction There was no device for detecting the thickness Z of the paper in the machine.

Therefore, when using a wide range of paper from thin paper to thick paper, service personnel or the user must change the pressure setting of the machine to eliminate problems caused by differences in properties depending on the thickness of the paper. did not become.

Purpose of the Invention The present invention relates to the invention of a paper thickness detection device for copying machines, etc., which eliminates such drawbacks.The purpose of the present invention is to detect the thickness Z of the paper and provide feedback to determine the thickness of the paper. The machine's set values can be automatically changed to take appropriate action depending on the situation, and the operator does not have to change the set values for thin paper or thick paper, and can improve efficiency. The purpose of this invention is to provide a paper processing device that can.

Composition of the invention The configuration of the present invention will be explained based on FIG.

The sheets are stocked in bundles on the elevator tray 2, and are fed out one by one starting from the top layer σ.

3 is a paper reduction detection means that detects when the position of the top layer of the stock m paper is lowered by exceeding a set limit due to the supply of paper; rises, paper is fed,
This is a feeding number counting means that counts 7 the number of sheets fed during one cycle until the position of the top layer paper exceeds the set limit 7 again and a detection signal is generated, and 5 is the number of sheets fed in the same cycle).
This is a sheet thickness calculation means for calculating the thickness of the sheet from the number of sheets fed by the hand J2 and the set limit of the lowering of the uppermost layer sheet position.

Since the present invention is configured as described above, the number of sheets fed during a certain distance ΔX from the position where the top layer sheet is the highest when the elevator tray rises to the set limit. Since n can be known, the thickness T of one sheet of paper can be calculated by the formula T=ΔX/l.

By setting the paper weight (,!i'/m) Fm, which is generally used to express the paper thickness, to a constant, T = K/n Cg/rrj)
It can be determined by

Embodiments Hereinafter, embodiments of the present invention applied to a copying machine will be described with reference to FIGS. 2 to 4.

FIG. 2 is a conceptual diagram of the present embodiment [sigma], where 2 and 2 are the same sheets and elevator trays as described above. Same elevator
) The lay 2 is connected to a row 111 suspended on a pulley 10, and is moved up and down by the rotation of the pulley 10.

The pulley 10 is rotated by the drive of a motor 12.

Reference numeral 13 denotes a delivery roll that contacts the top layer of the stocked paper 1σ and transports the same paper σ].

One end of an actuator 15 that rotates around 14 shafts is in contact with the top layer of paper, and the actuator I5 is in contact with the top layer of paper.
The other end contacts or separates from the contact of the detection switch 16 to perform a switching operation.

That is, when the paper is fed and the position of the top layer of paper decreases and reaches a certain limit, the first detection switch 16 is activated.
is turned on.

The control system of this embodiment is shown in FIG.

In the figure, -16 is the detection switch, 17 is a counter that counts the number of sheets to be sent out,
The signals from the tlJ detection switch 16 and the counter 17 are sent to the central processing unit O via the input interface tsy.
It is input to P U 19.

The OPU 19 uses the volatile memory RAM 20Y and performs information processing according to the program written in the nonvolatile memory IJ ROM 21, and outputs the output interface 22. Through W, the driving of the elevator-tray motor 12 and the delivery roll motor B is controlled, and the thickness of the sheet is calculated.

The operation of the control system described above will be explained according to the flowchart (FIG. 4) of the program written in the ROM 21.

-zf As a preparatory step, set the lift time of the elevator tray. This determines the variation distance Δχ in the position of the top layer of paper.

Next, when the number of copies is set and the start button is pressed, the feed roll motor M2 drives the m-paper F feed hanger for the necessary time, and the paper is fed to the counter 17.
Copying is carried out by repeating the number n increments).

If the predetermined number of copies have been made, the process returns to the point immediately before the setting of the number of copies, and if the predetermined number of copies has not been made, the detection switch 1 is turned on.
Determine whether 6 is ON or not, and 1 detection switch is OFF.
If there is no detection signal in the F state, the feed roll motor M2 is driven again to feed out the paper, the counter 7 is incremented, copies are made, and the predetermined number of copies is determined.

When there is a detection signal, the top layer (
Since the position of the paper has dropped and reached a predetermined limit, the thickness T of the paper is calculated based on the number of currants n in the currant.

Then, the elevator tray motor M1 is driven for a set time t, and the elevator tray and the paper feed ΔX are driven.
, the counter value is cleared, and the process returns to the driving step of the feed-out roll motor M2.

Here, a calculation example Z is shown in which the thickness and weight of paper are expressed.

Now, if 50 GSM (9/i) paper is fed and the counter indicates n-267, then the detection switch 16 is turned on only after 26 sheets of paper have been fed, then K = 1300 (=50x26)
By setting , it can be seen that if τ supply is performed for another sheet and rL-13 is displayed, the thickness T of that sheet is 1300/13=100 a SM.

Therefore, the thickness of 11 sheets can be detected using the equation T=1.300/7L.

The value of the constant is the lift time t of the elevator tray.
Determine the thickness of the paper by setting an appropriate time to the constant value! Make a decision.

Effects of the Invention As described above, in the present invention, since the thickness of the paper can be detected, the machine can be automatically adjusted according to the thickness of the paper.
The machine can be operated under appropriate setting conditions.

Therefore, the operator does not have to change the machine settings depending on the thickness of the paper, and time efficiency can be improved.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the configuration of the present invention, Fig. 2 is a conceptual diagram of an embodiment according to the present invention, Fig. 3 is a plotter diagram of the control system of this embodiment, and Fig. 4 is a diagram showing the ROM in this embodiment. The written program p-gram σ] flowchart). 1...Paper, 2...Elevator tray, 3...
Paper reduction detection means, 4... Paper feeding number counting means, 5.
...Paper thickness calculation means, 10...Pulley, 11...Lobe, 12...Elevator-tray motor M1.13...Feeding roll,
14... Axis, ■ Actuator, 16... Detection switch, 17... Calanter, 18... Input interface, 19... OPU. Add...RAM, 2]...ROM, 22...
Output interface, fin...feeding roll motor M2゜Representative Patent attorney Ehara Nozomi 1 Meo 1 En

Claims (1)

[Claims] In a paper processing device having an elevator train for feeding paper sheets one by one, there is a set limit at which the position of the top layer of paper in the paper feed decreases due to the reduction of paper sheets due to paper feeding. From the detection signal of the detection means, the elevator B-ray is raised and the paper is supplied, until the next detection signal of the detection means due to the lowering of the position of the top layer paper. The number of sheets fed during this period is calculated from the number of sheets fed by the counting means, the number of sheets fed by the same counting means, and the set limit for lowering the position of the top layer paper. 7. A paper thickness detection device for a paper processing apparatus, comprising: a paper thickness calculation means for calculating the paper thickness χ.