JPH03199924A - Method and apparatus for measuring roll-shaped material - Google Patents

Abstract

PURPOSE:To measure a material automatically without stopping by detecting the weight of the rolling roll-shaped material with piezoelectric sensors which are provided at the four corners of a measuring stage. CONSTITUTION:Conveying input table 1 and a conveying output table 2 are provided in inclined patterns in the same direction. A measuring stage 3 is arranged in an inclined pattern in the same direction between the tables 1 and 2. Piezoelectric sensors (a), (b), (c), and (d) are arranged at the four corners of the measuring stage 3. The measuring stage 3 is supported with the sensors. At this time, the load of a roll shaped material 4 is detected with the sensors (a), (b), (c) and (d). At this time, the output values of the sensors provided at the input side of conveying are gradually decreased with the progress of rolling. The output values of the sensors provided on the output side of conveying are gradually increased with the progress of the rolling. The sum of the voltage signals of the four sensors at each one time corresponds to the weight of the roll-shaped material 4. The voltage signal of a constant (n) is generated from each sensor during the rolling of the roll-shaped material 4. The addition of the voltage signals of each time is repeated. The total sum is divided by the constant (n), and the average value is obtained. In this way, the weight of the roll-shaped material can be measured highly accurately without stopping the roll-shaped material.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a weighing method suitable for automatically weighing a heavy roll-shaped object, such as a web of paper discharged from a paper machine, and a method thereof. The present invention relates to a measuring device used for.

PRIOR ART The conventional method for weighing paper rolls is to roll the paper rolls on a loading table set at an angle and then transport the rolls onto a horizontally set weighing table and weigh the rolls.
The roll of paper rolled from the carry-in table onto the weighing platform is manually stopped on the weighing platform, and after being weighed, it is manually transferred onto the carrying-out table installed at an angle. Since a heavy object weighing 1,500 kg must be manually stopped and transferred, it is not only difficult to work and requires heavy labor, but also involves the danger of workers being caught in the process.

Another method is to stop the web on the weighing platform using a cushion stopper that uses an air cylinder, but depending on the degree of inclination, it may take several times due to reaction before the heavy web hits the cushion stopper and stops. Because the process is repeated, it takes time and deteriorates the overall flow of the product, including post-processing.

Problems to be Solved by the Invention The present invention is capable of measuring the weight of a roll-shaped object such as a paper roll with high precision by rolling it on a weighing platform with the eyes open and without stopping the object. This eliminates the work loss associated with stopping, solves the safety problem of manually stopping a roll-shaped object in the conventional example, and also eliminates the need for equipment such as cushion stoppers as in the conventional example. This allows the above-mentioned measurement to be carried out properly without requiring a cushion stopper and without causing a loss in stopping time of the roll-shaped article due to a cushion stopper.

Means for Solving the Problems The present invention provides a method that is distantly related to the above-mentioned object, by measuring the load of a roll-like object applied to a weighing platform while the roll-like object is rolling on a weighing platform installed at an angle. A load is applied to the piezoelectric sensors installed independently at at least the four corners of the table, and during rolling, each piezoelectric sensor outputs a constant voltage signal corresponding to the weight, and the voltage signal values are summed up to the above constant (one This method uses a measurement method in which the number of signals output by the piezoelectric sensor is divided by the number of signals outputted by the piezoelectric sensor, and the resulting value is converted into weight.

In addition, as a device used in the above-mentioned ITFFI method, a roll-in table and a carry-out table are installed tilting in the same direction, and a weighing table tilting in the same direction as both tables is installed between the two tables. , piezoelectric sensors are arranged at at least four corners of the weighing platform, each piezoelectric sensor supports the weighing platform, and the load of a roll-shaped object rolling along the slope of the weighing platform is applied to each piezoelectric sensor. It is something.

A roll-shaped object such as a paper roll rolls on an inclined weighing platform at a speed corresponding to its weight, and the loads applied to the four corners of the rolling weighing platform are measured by piezoelectric sensors installed at the four corners. To detect. That is, the piezoelectric sensor is compressed or bent by the weight of the roll-shaped object, and outputs a voltage signal.

The output value of the voltage signal of the piezoelectric sensors at the two corners installed on the loading side of the roll-shaped object gradually decreases as the rolling progresses, and the output value of the voltage signal of the piezoelectric sensor at the two corners installed on the loading side of the roll-shaped object gradually decreases as the rolling progresses. It gradually increases as the movement progresses. The weight of the roll-like object is detected by a set of four piezoelectric sensors, and the sum of the voltage signals of each of the four piezoelectric sensors corresponds to the weight of the roll-like object.

During the rolling of the roll-shaped object, each piezoelectric sensor generates a constant voltage signal, and by dividing the sum of the voltage signals each time to obtain the average value, the weight of the roll-shaped object can be calculated by It is possible to measure objects with high precision and efficiency without stopping them.

EXAMPLES Hereinafter, examples of the present invention will be explained based on FIGS. 1 to 6.

Reference numeral 1 indicates a carry-in table for roll-shaped materials such as paper rolls, 2 indicates a carry-out table, and 3 indicates a weighing platform.

As shown in FIGS. 1 and 2, the 12-person table 1 and the carry-out table 2 are tilted in the same direction at an inclination angle of, for example, 2 to 3 degrees, and the above-mentioned weighing table is placed between both tables 1 and 2. The stand 3 is installed inclined in the same direction as both tables 1 and 2.

Piezoelectric sensors a, b,
c, d are arranged independently, and each piezoelectric sensor a, b,
The weighing platform 3 is supported at points c and d, and the load of the roll-shaped object 4 rolling on the weighing platform 3 is transmitted to the piezoelectric sensors a, b, c, and at each of the four corners.
d, and the piezoelectric sensors a, b, c at each of the four corners
, d- group to detect the weight of the roll-like object 4 applied to the four corners of the weighing platform 3.

Claims (2)

[Claims] (1) A roll-shaped object is rolled along a sloped surface on a weighing platform installed at an angle, and during the rolling, the load of the rolled object applied to the weighing platform is applied independently to each of at least four corners of the weighing platform. In addition to the piezoelectric sensor, each piezoelectric sensor outputs a constant voltage signal to each other during the rolling progress, and the voltage signals are summed and divided by the above constant (the number of signals output by one piezoelectric sensor). A method for measuring roll-shaped objects characterized by indicating the weight. (2) A roll-in table installed at an angle,
A weighing platform inclined in the same direction as both tables is installed between the carrying-in table and the carrying-out table installed inclined in the same direction, piezoelectric sensors are arranged at at least four corners of the weighing platform, and each piezoelectric sensor 1. A device for weighing roll-shaped objects, characterized in that the weighing platform is supported by the weighing platform, and the load of the roll-shaped object rolling along the inclined surface of the weighing platform is applied to each piezoelectric sensor.