JPH02175539A - Monitor for paper feeding belt - Google Patents

Abstract

PURPOSE:To enable the direct and non-contact monitoring of the operation condition of a paper feeding belt by detecting the mark of the belt non-contactly to count its output signal, and comparing the output signal to the preset value to obtain the deviation, and alarming when the deviation exceeds the specified value. CONSTITUTION:The mark 6 is adhered to a paper feeding belt 1, and a mark sensor 7 is provided at the through position spacedly facing to the mark. As the mark sensor 7, a mark sensor for detecting the mark 6 non-contactly and for generating the electric signal is appropriately selected. When the electric signal generated by the mark sensor 7 is sent to a computer alarm 8, the computer alarm 8 in which a counter for counting the electric signal is provided counts the passing frequency of the mark 6. Then, the result by counting is compared to the preset value by a comparator provided in the computer alarm 8 to compute the deviation, and when the deviation exceeds the specified value, an alarm provided in the computer alarm 8 is operated.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention automatically monitors the operating state of a paper conveying belt used in a paper sheet conveying device and issues an alarm when an abnormality occurs. This relates to a device for

[Conventional technology]

Conventionally, devices that automatically monitor the operating status of paper conveying belts in paper sheet conveying devices using paper conveying belts generally include (a) detecting the rotation of the belt axle around which the conveying belt is wound; (b) There are methods that detect the presence or absence of an abnormality by measuring the elapsed time when the paper sheet being transported passes through a predetermined section.

Note that, as a means for detecting an object on a moving belt, there is, for example, Machine Design Vol. 32, No. 10 (July 1988 issue).

[Problem to be solved by the invention]

Regarding the conventional devices of the methods (a) and (b) above, (a)
The problem with the device that detects the rotation of the belt axle described in section 1 is that it does not take into account the effect of slippage between the belt wheel and the belt, and cannot accurately detect the operating state of the paper conveying belt. There is.

In addition, with the device that measures the passage time of paper sheets as described in (2) above, the operational status of the paper transport belt cannot be determined unless the paper sheets are actually conveyed, which can lead to problems such as paper jams. There is a problem in that an abnormality can only be detected after it occurs.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, it is an object of the present invention to provide a device that can directly and non-contactly monitor the operating state of a paper conveying belt.

(Means for solving IIIM) The above purpose is to mark the belt, provide a sensor that non-contactly detects the mark and generates an electric signal, and counts the output signal of the sensor. This is achieved by comparing this with a preset value to find a deviation, and issuing an alarm when this deviation exceeds a predetermined value.

[Effect]

According to the above configuration, the moving speed of the paper transport belt is detected in a non-contact manner.

Since it is performed in a non-contact manner, it does not affect the conveyance of paper sheets.

Further, since the moving speed of the paper conveying belt itself is directly detected, it is not affected by slippage between the belt wheel and the belt, and paper jams can be prevented before they occur.

〔Example〕

FIG. 1 is a perspective view of a sheet conveying device equipped with an embodiment of a monitoring device according to the present invention.

The drive-side paper transport belt 1 is wound between a drive belt pulley 3 and a driven belt pulley 4, which are rotated by a drive source 2.

The driven paper conveying belt 5 is wound between the driven belt sheaves 4' and is in contact with the drive belt sheave 3. Paper sheets (not shown) are conveyed while being sandwiched between the two paper conveying belts 1 and 5.

A mark 6 is attached to the paper conveying belt 1, and a mark sensor 7 is provided oppositely and spaced apart at a passing position of the mark 6.

As the mark sensor 7 described above, one that detects the mark 6 in a non-contact manner and emits an electric signal is appropriately selected and used.

For example, when a magnet is used as the mark 6, a detector using a Hall element or a reed switch is suitable as the mark sensor 7.

Further, when paint is used as the mark 6, a photoelectric switch is suitable as the mark sensor 7.

The electrical signal emitted by the mark sensor 7 is sent to a calculation/alarm device 8.

The above calculation/alarm device 8 is provided with a counter that directly counts the electrical signal emitted by the mark sensor 7 or converts it into a DC voltage and counts the frequency of passage of the mark 6. Ru.

Then, the above-mentioned count result is applied to the above-mentioned calculation/alarm device 8.
A comparator installed in the set value is compared with the set value, and the deviation is calculated.

When the above-mentioned deviation exceeds a specified value, an alarm provided in the arithmetic/alarm device 8 is activated.

According to this embodiment, when the moving speed of the paper conveying belt deviates from a predetermined value, this is automatically detected and a warning is issued.

The above-mentioned detection and alarm functions operate correctly without being affected by slippage between the belt and the belt wheel. In addition, the detection and alarm functions are performed regardless of whether paper sheets are being conveyed or not.

FIG. 2 shows an embodiment different from the above. This embodiment can be applied to either the driving side paper transport belt 1 or the driven side paper transport belt 5, and the length direction thereof is divided into equal parts and marks 6 are attached at equal intervals. By increasing the number of marks 6 installed in this manner, detection accuracy and responsiveness can be improved.

The mark 6 of the embodiment shown in Fig. 1 and Kaji 2 has the length dimension of the mark 6 set almost equal to the width dimension W of the belt 1 (or belt 5) as shown in Fig. 3 (A). However, in Figure 3 (B
), the length dimension Q of the mark 6' may be set to Q<W.

Also, as shown in the mark 6'' shown in Fig. 4, the belt 1 (
Alternatively, it can also be attached to the side of the belt 5).

These embodiments also provide the same effects as the embodiments described above,
Effects can be obtained.

〔Effect of the invention〕

As explained above, when the paper conveying belt monitoring device according to the present invention is applied.

Regardless of whether paper sheets are being conveyed or not, the operating status of the paper conveying belt is automatically monitored without being affected by slippage between the belt and the belt wheel, and if an abnormality occurs, it is immediately detected. It has an excellent practical effect of being alerted.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a paper conveying belt monitoring device according to the present invention. FIG. 2 is a perspective view of a paper conveying belt in an embodiment different from the above. FIG. 3 is an explanatory diagram of marks provided on the paper transport belt, and FIG. 4 is a perspective view showing marks in a different embodiment from the above. 1... Drive-side paper feed belt, 2... Drive source, 3...
Drive belt pulley, 4, 4'... Driven belt pulley, 5...
Driven side paper feed belt, 6.6', 6"... mark, 7
...Mark sensor, 8...Calculation/alarm device. Figures (A) and (B) ni' (mark 7) No. 5 (b) Lt, n m--7

Claims (1)

[Claims] 1. A device for monitoring the operating state of a paper transport belt used in a paper sheet conveyance device, which detects a mark provided on the paper transport belt and the above mark in a non-contact manner. a counter that receives the output signal of the sensor and calculates its cycle; a comparator that compares the calculated cycle with a preset value; and a comparator that compares the calculated cycle with a preset value. A monitoring device for a paper conveying belt, comprising: an alarm that issues an alarm when the deviation calculated by the above exceeds a predetermined value;