JPH1146831A - Powder filling system - Google Patents

Abstract

(57) [Summary] [Problem] To accurately judge the quality of gluing of an inner flap by using two laser sensors. SOLUTION: A gluing state detecting means 6 for gluing an inner flap of a box conveyed by a conveying means to a bottom portion is provided by: a laser sensor for simultaneously measuring a distance to two different inner flaps; A filling control unit for controlling the operation of the filling means in accordance with whether or not the deviation of each measurement result exceeds a set tolerance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder or granular material filling system for carrying out the above-mentioned filling or empty box discharge in accordance with the result of judging whether or not a box is suitable for filling with a granular material.

[0002]

2. Description of the Related Art In a conventional powder and granular material filling system, filling and packing of powder and granular material are performed by means shown in FIG. 6, for example. That is, first, in the box unloading step 1, a box that has been folded and crushed flat beforehand and packed in a container or the like is taken out from the container or the like, and the box thus taken out is assembled into a container and transported. The sheet is placed on the means 2 and transported to the gluing means 3.

In the gluing means 3, at least two folded inner flaps of the box are glued to a bottom portion (for example, two outer flaps), and each of these inner flaps is fixed flat to the bottom portion. After it is confirmed by the gluing state detecting means 6 composed of the laser sensor 4 and the filling control section 5 that the sufficient amount has been achieved, the filling means 7 fills the box with a fixed amount of powder and granules from the upper opening of the box. I do.

After the filling is completed, the flap at the upper part of the opening of the box is closed and packed by packing means 8,
Send to product management department. On the other hand, when it is detected by the laser sensor 4 that the inner flap is incompletely fixed to the bottom, the filling is stopped, the box is sent out by the empty box discharging means 9, and reassembly is performed. Or discard.

By the way, the box used for storing detergents and the like is made by a box manufacturer by cutting a cardboard board or the like in accordance with design dimensions to produce a flat box box. A part is glued, folded flat and shipped. Therefore, in a detergent maker, a pair of side plates facing each other of the folded box component plate is raised to the other side plate to form a cylindrical body. Furthermore, this cylindrical body
As shown in FIG. 7, at least two opposing inner flaps 11 and 12 are bent as a bottom in a direction in contact with a pair of opposing outer flaps (here, only one is shown) 13 and are further opposing. The upper flaps (inner and outer flaps) 14 are left open as shown.

The box H assembled as shown in FIG. 7 has been folded flat until the detergent maker arrives, so that a force acting to deform in the folding direction acts. If the shape of the box is deformed, the subsequent gluing operation and the filling operation of the granular material are hindered. For this reason, when the assembled box body H is placed on the transporting means 2 and transported to the lower position of the gluing means 3 and the filling means 7, the inner flap 12 is, for example, of the inner flap 12 'shown by a broken line. It is necessary to raise the inclination to 45 ° so that the inner flap 12 'can obtain the shape retaining effect as a box.

The box H transported in the above state
The inner flaps 11, 12 are
And the outer flap 13 are glued, and the gluing state can be maintained by the subsequent blowing pressure from above the box body. Further, the glued state is sent to the lower part of the filling means 7 to fill the powder and granules as described above. Is performed.

However, the weighing by the filling means,
In the case where the filling time is short, for example, even after the above-mentioned gluing is performed, the inner flap 12 which has been raised and used to keep the shape of the box H rises by its own repulsive force before and after the gluing process. This causes poor gluing or squeeze out of the glue, which causes defective products and lowers the efficiency of the powder particle filling process.

For this reason, the gluing state detecting means 6 determines whether or not the inner flap 12 has been sufficiently glued to the outer flap 13, that is, whether or not the inner flap 12 has risen abnormally. It is detected by one of the constituent laser sensors 4. In addition, since the inner flap 11 is not used for shape-retaining, the inner flap 11 does not stand up by itself, and the gluing is almost certainly performed.

The laser sensor 4 emits laser light toward the bottom of the box H moving at a predetermined speed for a certain period of time, that is, within a predetermined area (for example, 70 mm) applied to the inner flaps 11 and 12 and thereafter. The distance to the inner flaps 11 and 12 is optically measured by detecting the time until the reflected light from each of the inner flaps 11 and 12 is received, and the maximum value of the measured values obtained in the above area The charging control unit 5 determines whether the error between the minimum value and the minimum value exceeds a preset tolerance.

The box H is moved by a belt conveyor or the like in the direction indicated by the arrow in FIG.
The arrival of the box H is detected by 1 and PH2. The photo sensors PH1 and PH2 are provided at positions corresponding to the positions where the laser sensors 4 are provided. Photo sensor PH
The detection signals 1 and PH2 are output as a synchronization signal, and the synchronization signal determines the time when the measurement starts and the time when the sampling value is held.

FIG. 8 is a diagram showing the results of measuring the distance to the inner flaps 11 and 12 by the conventional laser sensor 4. The laser sensor 4 outputs the length of the distance to the inner flaps 11 and 12 as the magnitude of the voltage. The curve denoted by reference symbol D1 in the figure is the voltage value output from the laser sensor. This voltage value is input to the filling control unit 5 and sampling is performed. The maximum value of the sampled voltage value is held at the rise of the synchronization signal denoted by reference symbol S1 in FIG. For example, in the sampling period T2, the maximum value of the voltage value is a portion indicated by reference numeral PV in the figure, and the maximum value is from the time when the sampling period T2 ends (the time when the synchronization signal is output from the photosensor PH2). The value is held until the sampling period T3 ends (hereinafter, the held value is referred to as a hold value). The hold value is a curve indicating a stepwise change indicated by P1 in the figure.

The difference between the maximum value and the minimum value obtained from the hold value is calculated, and if the calculated value is within the set tolerance, the gluing is judged to be good, and the box H After the filling, the upper flap 14 is closed, gluing or the like is performed, and the resultant is sent to the packing means 8, where it is packed and carried out as commodities.
On the other hand, if the gluing is determined to be defective, the filling of the granular material into the box H by the filling means 7 is prevented, and the empty box discharging means 9 discharges the powder to the outside, for example, and reassembles or discards. Will be done.

[0014]

In the above-described method of detecting a defective gluing in the conventional powder and granular material filling system, one laser sensor 4 scans the area and scans the maximum and minimum values of the measured values. Therefore, there is a problem that it takes a long time to determine a defective gluing, and the efficiency of the gluing operation is low. In addition, the box H being conveyed vibrates or swings in the measurement area by the laser sensor 4, resulting in an erroneous distance measurement result. There has been a problem that the empty box is discharged without filling the granules.

The present invention has been made in view of the above circumstances, and by using two laser sensors, it is possible to accurately determine the quality of gluing of the inner flap. It is an object of the present invention to provide a powder and granular material filling system capable of efficiently performing a filling operation into a body and discharging a defective empty box.

[0016]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a structure in which at least two folded inner flaps are provided at the bottom so as to face each other, and one of the inner flaps is provided with a higher flap than the other flaps. Transport means for transporting a box folded so as to be locked to the side plate and opening the upper part, gluing means for gluing the inner flap transported by the transport means to the bottom, and gluing A gluing state detecting means for detecting whether or not the gluing by the means is defective; and a filling means for filling the box body with the granular material if the result of the gluing detected by the gluing state detecting means is good. In a powder and granular material filling system comprising
The gluing state detecting means, each one laser sensor for simultaneously measuring the distance to two different inner flaps,
A filling control unit that determines whether a deviation of each measurement result by the laser sensor exceeds a set tolerance and, if so, stops and controls the operation of the filling unit.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a granular material filling system according to an embodiment of the present invention. The basic configuration is the same as the conventional granular material filling system shown in FIG. However, in the present embodiment, the two laser sensors 4A and 4B are provided in the glue state detecting means 6, and the inner flaps 11 and 12 are provided in accordance with the calculation processing result in the filling control unit 5A based on the two sensor outputs. The determination of the distance and the gluing state is performed at high speed without erroneous determination.

That is, according to the present invention, as shown in FIG. 2, an inner flap 11 opposed to a box H conveyed at a predetermined speed in a direction indicated by an arrow from two laser sensors 4A and 4B disposed at an upper portion. , 12 are irradiated with laser light.
The laser sensors 4A and 4B are arranged at a constant interval (for example, 70 mm) so that a laser beam spot can be irradiated on the inner flaps 11 and 12 at the same time. The reflected light from the inner flaps 11 and 12 is received by the laser sensors 4A and 4B, and the filling control unit 5A determines the distance between the inner flaps 11 and 12 from the measured time from irradiation to light reception. Measure.

FIG. 3 is a diagram showing the results of measuring the distance to the inner flaps 11 and 12 when using the laser sensors 4A and 4B used in the granular material filling system according to one embodiment of the present invention. In the figure, the curve marked with D2 is the laser sensor 4
It is a figure showing an example of a voltage value outputted from A or laser sensor 4B. Laser sensor 4A or laser sensor 4B
The peak value is detected by the filling control unit 5A from the signal output from the controller. When the peak value is detected, a peak detection output signal shown in the drawing is output. When the peak value is detected, the filling control unit 5A holds the peak value.

In the figure, the timing input signal is a signal output from the photo sensor PH2, and the filling control unit 5A holds the voltage values input from the photo sensors 5A and 5B at the time when the timing input signal is input. I do. When the voltage values output from the photosensors 5A and 5B are held, the filling control unit 5A subtracts the voltage value of the held photosensor 5A from the held voltage value of the photosensor 5B (calculating the error). Then, it is determined whether or not the subtraction result exceeds a predetermined set tolerance. When a predetermined time has elapsed after the input of the timing input signal, a hold reset input signal is input as shown in FIG. 3 to cancel the hold processing.

If the result of the subtraction does not exceed the set tolerance, the operation of the filling means 7 is continued to enable the filling of the box H with the powder and granules. After closing the upper flap 14, it is sent to the packing means. On the other hand, if the above calculation result exceeds the set tolerance,
The operation of the filling means 7 is immediately stopped, the filling of the powder H into the box H is stopped, and the box is sent to the empty box discharging means 9 to be discharged to the outside. In the subtraction process, the measurement distance to the inner flap 11 at which the gluing to the bottom is always assured becomes the measurement reference value.

The laser sensors 4A, 4A
Since the distance measurement to the inner flaps 11 and 12 by B is performed at the time when the timing input signal is inputted, it is assumed that the box H being conveyed swings or vibrates during the distance measurement. Even if there is an error, the error caused by the swing and vibration affects the measured values of the laser sensors 4A and 4B at the same level, and therefore the above-described subtraction cancels out the influence. Therefore, the determination result of the gluing state, which is the state of the return of the inner flap 12, does not involve an error caused by the swing or the like. That is, the return detection of the inner flap 12 can be realized at high speed and with high accuracy. As a result, malfunction of the filling means 7 and the empty box discharging means 9 by the filling control unit 5A can be prevented, and the work of filling the granular material can be made more efficient.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The inventor conducted a test of return detection measurement of an inner flap using the above-described powder and granular material filling system according to one embodiment of the present invention. 4 and 5 are a chart showing the test results and a diagram showing the test results in a graph format, respectively. In this test, 13369 within 7 hours 25 minutes
A test was performed on each of the boxes H, and the set tolerance described above was ±
It was set to 5 mm.

As shown in FIG. 4, the value obtained by subtracting the distance from the laser sensor 4A to the inner flap 11 from the distance from the laser sensor 4B to the inner flap 12 is the set tolerance 5.
The number of boxes exceeding 0 mm is zero and the set tolerance is -5 mm
The number of boxes exceeding 5 was 5. In addition, the laser sensor 4
From the distance from B to the inner flap 12, the laser sensor 4
The average value of the value obtained by subtracting the distance from A to the inner flap 11 is 0.6 mm, the minimum value is -11.5 mm, the maximum value is 4.9 mm, and the width between the maximum value and the minimum value, that is, The range was 16.4 mm. The standard deviation of all the boxes was 1.2.

When the total number of boxes is displayed in the form of a histogram table, the result is as shown in FIG. As shown in this figure, for many boxes, the value obtained by subtracting the distance from the laser sensor 4A to the inner flap 11 from the distance from the laser sensor 4B to the inner flap 12 is -2.0 mm to 2.5.
mm. The time required for the test was within 7 hours and 25 minutes. Since the tests were performed on 13369 boxes H during this time, the test was performed at a rate of 1 per 2 seconds, which was extremely high speed. It was found that the test could be performed quickly and accurately.

When the box H is moved at a high speed, the box H being conveyed often swings or vibrates. According to the present embodiment, however, the laser sensors 4A and 4B are used. Since the distance measurement to the inner flaps 11 and 12 is performed only at the time when the timing input signal is input, it is possible to eliminate the influence of the swing on the determination result, thereby realizing high-speed and high-precision measurement. Become.

[0027]

As described above, according to the present invention,
A gluing state detecting means for gluing the inner flap of the box conveyed by the conveying means to the bottom portion, each one laser sensor for simultaneously measuring a distance to two different inner flaps,
And a filling control unit for controlling the operation of the filling means in accordance with whether or not the deviation of each measurement result by the laser sensor exceeds a set tolerance. Can be accurately and promptly determined, and the following operations can be performed to efficiently carry out the subsequent filling operation of the granular material into the box body and the discharge of the defective empty box.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a granular material filling system according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a relationship between a laser sensor and a box in FIG. 1;

FIG. 3 is a diagram showing a distance measurement result to inner flaps 11 and 12 when using laser sensors 4A and 4B used in the powder and granular material filling system according to the embodiment.

FIG. 4 is a table showing test results.

FIG. 5 is a diagram showing test results in a graph format.

FIG. 6 is a block diagram showing a conventional granular material filling system.

FIG. 7 is an explanatory diagram showing a relationship between a laser sensor and a box in FIG. 6;

8 is an inner flap 1 by a conventional laser sensor 4. FIG.
It is a figure which shows the distance measurement result to 1 and 12.

[Explanation of symbols]

 2 Conveying means 3 Gluing means 4A, 4B Laser sensor 5A Filling control unit 6 Gluing state detecting means 7 Filling means H Box body 11, 12 Inner flap 13 Outer flap (bottom part)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoshi Sakuma 1-3-7 Honjo, Sumida-ku, Tokyo Inside Lion Engineering Co., Ltd.

Claims (1)

[Claims] At least two folded inner flaps are provided on the bottom so as to face each other, and one of the inner flaps is folded back larger than the other flaps so as to lock on the side plate and open the upper part. Transport means for transporting the assembled box, gluing means for gluing the inner flap transported by the transport means to the bottom, and gluing state detecting means for detecting whether or not the gluing by the gluing means is defective. A filling means for filling the box with the granules if the result of the pasting by the pasting state detecting means is good; Is a laser sensor for simultaneously measuring the distances to two different inner flaps, and determining whether a deviation of each measurement result by the laser sensor exceeds a set tolerance. And, granular material filling system, characterized by comprising a filling control unit for stopping controlling the operation of the filling means when it exceeds.