JP2001247110A - Method and apparatus for detecting lack of roll of paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for detecting a lack of rolls of paper wherein a space for detecting a weight is not particularly needed since it is placed on a part of a belt conveyer, and wherein the lack of the rolls can be reliably detected while the structure is simple and can be inexpensively manufactured. SOLUTION: The apparatus for detecting the lack of the rolls of paper includes a plurality of belt conveyers 3 which are lowered when a bag A with the rolls of paper therein is fed to a predetermined position, a rail 7a located between the belt conveyers 3 on which the bag is mounted when the belt conveyers 3 are lowered, and a weight measuring means 7 such as a load cell for measuring weights of the rail 7a and the bag A and outputting a signal indicating the lack of the rolls when the weight of the bag which does not receive a predetermined number of the rolls is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically wrapping a plurality of roll paper rolls such as toilet paper and kitchen paper in a cylindrical bag to determine whether a predetermined number of roll papers are contained. A method and apparatus for detecting.

[0002]

2. Description of the Related Art Conventionally, in a factory for producing roll paper such as toilet paper and kitchen paper, a plurality of roll papers (for example, 8 rolls and 12 rolls) are packaged in a cylindrical bag. It is shipped and sold in a state, but when the roll paper is automatically packaged in the bag body, a predetermined number may not be stored for some reason.

Therefore, it is necessary to inspect whether or not a predetermined number of roll papers are stored in the bag. Conventionally, as this inspection method, when the roll paper is stored in the bag, the number of roll papers is determined by an optical sensor. There are a detection method, a method in which the microswitch is pressed from the outside of the bag after the roll paper is inserted into the bag, detection, a method of measuring the weight with a commercially available weight checker, an artificial detection method by an inspector, and the like.

[0004]

However, in the above-mentioned method of performing an inspection using an optical sensor, the detection surface of the optical sensor is erroneously contaminated by paper dust or paper chips generated when the roll paper is stored in the bag. There is a problem that the detection may be performed and the production line is stopped, thereby lowering the yield.

Further, in the method of detecting a microswitch by abutting it on the bag surface, erroneous detection may occur because the pressing force of the microswitch against the bag surface is not constant, and the life of the microswitch is shortened. There is a problem that it is not stable, and furthermore, in the weight measurement using the weight checker, there are problems that the cost is high and the installation area is large.

Further, it is extremely unlikely that the problem of insufficient roll paper occurs in actual automatic packaging. However, there has been a problem that labor costs have risen.

An object of the present invention is to achieve the above-mentioned problems, and an object of the present invention is to install a part of a belt conveyor so that a space for weight detection is not particularly required, and a roll paper is provided. An object of the present invention is to provide a method and an apparatus for detecting a shortage of roll paper, which can reliably detect the shortage of the roll paper and have a very simple structure at a low cost.

[0008]

SUMMARY OF THE INVENTION A method of detecting a shortage of roll paper according to the present invention is intended to achieve the above-mentioned object, and the means includes a bag containing roll paper to a predetermined position on a plurality of belt conveyors. When the body is sent,
When the belt conveyor descends, the bags are placed on a plurality of rails positioned between the belt conveyors, and only the weight of the bags placed on the rails increases with respect to the weight of the rails. When the increase amount does not reach a predetermined value, an output indicating that roll paper is insufficient is sent out.

Further, the means of the roll paper shortage detecting device according to the present invention comprises a plurality of belt conveyors which descend when the bag body storing the roll paper is sent to a predetermined position, and a belt conveyor which is located between the belts. When the belt conveyor descends, the rail on which the bag is placed, and the weight of the rail and the weight of the bag are measured, and when the weight of the bag in which a predetermined number of roll paper is not stored is detected, the roll is rolled. And a weight measuring means such as a load cell for outputting an output of paper shortage.

The bag may be placed on the rail by rotating the conveyor with one end serving as a fulcrum.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a roll paper shortage detecting apparatus according to the present invention will be described below with reference to FIGS. Reference numerals 1 and 2 denote a carry-in conveyor for transferring to a shortage detection device according to the present invention for detecting whether a predetermined number of roll papers are stored in a bag body A storing roll papers, and a book. This is a carry-out conveyor that carries out the bag A that has passed through the shortage detection device of the present invention to a subsequent process such as box packing. Note that, in one bag A, roll paper is usually stored in two stages or three stages.

Reference numeral 3 denotes the conveyors 1 and 2 for carrying in and out.
A belt conveyor consisting of four articles installed between
It is wound around a driving pulley 4a and a rotating pulley 4b rotatably mounted on a belt support 4 rotatably supported on a shaft. The drive pulley 4a is attached to a drive rotary shaft 4c rotated by a motor (not shown), and the rotary pulley 4b is connected to a rotary shaft 4d supported by the belt support 4.
Mounted on

Further, the belt support 4 is moved by a cylinder 5 such as an air cylinder so that the belt conveyor 3 is in a horizontal state.
The bag A conveyed by the belt conveyor 3 is in a horizontal state up to a predetermined position, and the end of the bag A is detected by a sensor 6 such as a transmission optical sensor. Then, the driving rotary shaft 4c becomes a fulcrum, and is inclined.

Reference numeral 7 denotes weight measuring means in which three rails 7a face the gaps between the four belt conveyors 3 at a height not protruding from the upper surface of the belt conveyor 3.
The rail 7a is connected to a measuring device 8 for measuring the weight of a load cell or the like in an integrated state.

Next, a method of detecting whether a predetermined number of roll papers are stored in the bag A based on the above-described configuration will be described. When the bag body A containing the roll paper is supplied to the rotating belt conveyor 3 by the carry-in conveyor 1, the bag body A is further transferred to the carry-out conveyor 2 by the belt conveyor 3.
The bag body A moving on the belt conveyor 3 does not come into contact with the rail 7a located at a lower position than the belt conveyor 3, and is smoothly transferred.

When the end of the bag A which moves on the belt conveyor 3 is detected by the sensor 6, the cylinder 5 is displaced in the contracting direction, so that the belt conveyor 3 is inclined downward about the driving rotary shaft 4c. I do.

As a result, the bag A is placed on the rail 7a, so that the weight of the bag A containing the roll paper is added to the measuring device 8 in addition to the weight of the weight measuring means 7. Then, by calculating the difference between the weight of the bag A in which the predetermined number is stored and the weight of the bag A measured this time, in the case of the bag A in which the predetermined number of roll papers are not stored. Is negative, it can be detected from this calculated value that the roll paper is insufficient.

As described above, when the detection of whether there is a shortage in the roll paper is completed, the cylinder 5 is extended, the belt conveyor 3 is in a horizontal state, and the bag body A moves onto the belt conveyor 3. At this time, since the belt conveyor 3 is rotating, the bag body A is transferred to the unloading conveyor 2 by the belt conveyor 3 and is sent to the next boxing step or the defective article discharging step.

[0019]

As described above, according to the present invention, a plurality of bags descending when the bag containing the roll paper is fed to a predetermined position during the flow step of the bag containing the roll paper. A belt conveyor, a rail positioned between the belt conveyors, and a rail on which the bag body is placed when the belt conveyor descends, measures the weight of the rail and the weight of the bag body, and stores a predetermined number of roll papers. By providing a weight measuring means such as a load cell that sends out an output of insufficient roll paper when detecting the weight of the unreacted bag, the detection can be performed without significantly delaying the time of the flow process, and the structure of the device is reduced. It is simple, can be manufactured at low cost, is maintenance-free, can be used for a long period of time, and has the effect of being able to operate in a space-saving manner.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a roll paper shortage detection device according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a right side view of the same.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 carry-in conveyor 2 carry-out conveyor 3 belt conveyor 4 belt support 5 cylinder 6 sensor 7 weight measuring means 7a rail 8 measuring device A bag

Claims (3)

[Claims] When a bag containing roll paper is fed to a predetermined position on a plurality of belt conveyors, the belt conveyer is lowered and the bag is placed on a plurality of rails positioned between the belt conveyors. Only when the weight of the bag placed on the rail is increased relative to the weight of the rail, and when the increase does not reach a predetermined value, an output indicating that the roll paper is insufficient is sent out. A method for detecting a shortage of roll paper. 2. A plurality of belt conveyors, which descend when a bag containing roll paper is sent to a predetermined position, and said bags are placed between said belts when said belt conveyor descends. And a weight measuring means such as a load cell for measuring the weight of the rail and the weight of the bag body, and outputting an output of insufficient roll paper when detecting the weight of the bag body in which a predetermined number of roll papers are not stored. And a roll paper shortage detection device comprising: 3. The roll paper shortage detecting device according to claim 2, wherein the bag body is placed on the rail by rotating the conveyor with one end serving as a fulcrum.