JPH06102445B2 - How to automatically set carton dimensions in a packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention detects the size of a carton supplied to a packaging machine,
The present invention relates to an automatic dimension setting method for automatically switching dimensions in a size automatic switching device of a packaging machine.

[Conventional technology]

FIG. 3 is a development view of an example of the carton W, and FIG. 4 is a plan view of the carton W folded and supplied to a packaging machine.

When supplying this carton W to a packaging machine (not shown), for example, a sample is taken out for each rod of the carton, and the dimensions of each part are measured manually, and based on this, the dimensions of the carton receiving part and other parts of the packaging machine. Means to adjust the.

[Problems to be Solved by the Invention] Since the above-mentioned packaging machine switches between various types of packaging, it is necessary to measure the dimensions of the carton each time and adjust the packaging machine to conform to this. However, it takes time to measure the dimensions of each part due to human power, and there is a possibility that a measurement error will often occur. In particular, the carton is made of paper, and the measurement pressure has a delicate influence on the carton, which causes variations in the measured values, making it difficult to perform accurate measurements and requiring time to set the dimensions of the packaging machine.

In view of the above point, the present invention has an image pickup tube (for example, a CCD camera).
The purpose is to electrically measure the dimensions accurately from the captured image, and to automatically set the dimensions of the carton in the packaging machine based on this.

[Means for Solving the Problems]

The method for automatically setting the dimensions of the carton in the packaging machine of the present invention for achieving the above object is an automatic switching device for the size of the carton in the packaging machine, measuring the dimensions of the required portion by imaging the sample of the carton by the image pickup tube, Compare this size with the standard carton size, and if it goes out of the preset value range, an alarm will be issued, and if it is within the set value range, the value obtained by adding a predetermined correction value to the measured value of the sample will be displayed. The point is to set automatically.

In this case, it is preferable that the standard carton size is determined from the average value by measuring the size of each required part by imaging the carton of a plurality of samples with an image pickup tube.

Further, it is preferable that the correction value is determined based on the data obtained by the trial run.

[Work]

By photographing the carton with the image pickup tube, the dimensions of each part of the image pickup are electrically measured. Therefore, the comparison with the preset value (allowable range) and the addition of the correction value for the packaging machine can be automatically performed.

〔Example〕

FIGS. 1 and 2 relate to an embodiment of the present invention, and FIG. 1 is a flow chart of a procedure for determining a standard dimension and determining a correction value.

First, a carton sample to be used as a standard is inserted between two glass plates in step 1, photographed by a CCD camera with transmitted light, and dimensions of each part of a required portion of the image pickup are measured (step 2). In this case, the dimensional variation portion is stored. In addition, it is preferable to measure not only one sample but a plurality of samples,
The average value is calculated and set as the standard dimension A and stored (step 4). Exact standard dimensions can be determined when determining from the average value of the cartons of multiple samples.

Next, the correction value is determined. The correction value in this case is a dimension that allows the packaging machine to have a margin for receiving the carton and performing the packaging work.If it is too small, the carton will not be inserted smoothly, and if it is too large, there will be a problem with positioning etc. The carton is supplied to the packaging machine and is determined by temporary operation.

That is, a temporary correction value of an appropriate value is set, and in step 5, it is supplied to the actual packaging machine, temporary operation is performed, and the quality is checked (step 6). If it is defective, change the temporary correction value,
Repeat temporary operation. Thereby, the carton can be smoothly inserted.

When all are optimal, this test is completed, and the correction value at that time is set as the correction value B for actual operation and stored.

However, this correction value B is a value that can be applied as it is in the actual packaging work if the dimensions of the supplied carton are within the allowable range such as manufacturing tolerance.

Thereafter, the procedure for setting the dimensions of the packaging machine during actual operation will be described based on the flowchart shown in FIG.

First, an appropriate number of cartons to be supplied, for example, one carton for each rod of the carton is taken out as a sample, and this is taken in the same manner as in the standard measurement.
An image is taken with a CCD camera, and in step 11, the dimensions of each required part are measured.

Then, in step 12, the standard size A is compared. At this time, when all are equal (the difference is 0), in this case, the correction value B is added to the measured value, and this is applied to the automatic size switching device (not shown) of the packaging machine to start the packaging work.

If this sample has a difference from the standard size A, that is, if it is larger than the standard size A, step
If the size is smaller than the standard size A, the comparison circuit 13a compares the set value C with the comparison circuit 13b. The set value C is a permissible tolerance (specified range), and when it is out of this range, an alarm is issued and the machine is stopped.

If it is within the range of the set value C, the correction value B is added and the packaging work is started in the above-mentioned manner.

〔The invention's effect〕

According to the present invention, since the sample size of the carton is photographed by the image pickup tube and the image pickup is electrically measured, the carton can be measured accurately and quickly. In particular, the carton is generally made of paper. It is possible to solve the drawback that the measurement pressure influences when the measurement is performed manually.

Further, according to the present invention, a margin convenient for operation, that is, a correction value is determined for the standard size, and the correction value is added to the carton size during actual operation, so that the packaging machine can be smoothly operated. it can.

[Brief description of drawings]

FIGS. 1 and 2 relate to an embodiment of the present invention. FIG. 1 is a flow chart for determining a standard size and correction value, and FIG. 2 is a flow chart for adding a correction value to a carton size during actual operation. 3 is a development view of the carton, and FIG. 4 is a plan view of the folded carton. A is a standard size, and B is a correction value.

Claims (3)

[Claims] 1. An automatic carton size switching device for a packaging machine, in which an image of a carton sample is taken by an image pickup tube to measure the size of a required portion, and this size is compared with a standard carton size to set a preset value. When it goes out of the value range, an alarm is issued, and when it is within the set value range, the value obtained by adding a predetermined correction value to the measured value of the sample is automatically set. Automatic setting method. 2. The standard carton size is determined by imaging the carton of a plurality of samples with an image pickup tube, measuring the size of each required part, and determining from the average value thereof. Setting method. 3. A method for automatically setting a carton size in a packaging machine according to claim 1, wherein the correction value is determined on the basis of data obtained by a trial run.