JP7200087B2 - Product inspection device and product inspection method - Google Patents

Description

The present invention is a product inspection apparatus and method for inspecting the excess or deficiency of the number of articles contained in each product, with a product group in which a plurality of articles are accommodated in packaging materials in a row. More specifically, the present invention relates to a product inspection apparatus and method capable of stably inspecting the excess or deficiency of the number of articles in a product regardless of the type or mode of the articles.

Patent Document 1 below discloses an invention of a weight sorter that determines whether or not the number of articles contained in a product is the regular number based on the weight of a product in which a plurality of articles are packed. . This weighing machine has a reference weight value that serves as a criterion for judgment, and upper and lower allowable weight values from the reference weight value. , it is determined that the number of articles included in the product is the regular number. Then, this weight sorter calculates an average weight value of the predetermined number of products each time a predetermined number of products determined to be acceptable are weighed, and if the average weight value differs from the reference weight value, automatically correcting the reference weight value to an average weight value;

Patent Document 2 below discloses an invention of an X-ray mass measuring device. In this X-ray mass measuring apparatus, the boundary position of the transported chain-wrapped workpiece W is detected by the boundary detector 5, and this detection signal is output to the mass integrator 11 as a boundary signal after predetermined signal processing. In addition, the line mass calculation unit 10 calculates the X-ray absorption amount absorbed by the continuous wrapping work W based on the X-ray transmission data from the X-ray detector 4, and after adding up the amount of one cycle of the line sensor, the tare part The X-ray absorption amount of the content is obtained by subtracting the X-ray absorption amount of the contents, and this is multiplied by the mass conversion factor to calculate the line mass value, which is output to the mass integration unit 11 . The mass accumulating unit 11 starts accumulating the line mass value in accordance with the input timing of the boundary signal, finishes accumulating the line mass value at the next input timing of the boundary signal, and calculates the content material amount value of the individual bag. Calculate According to the present invention, it is possible to measure the mass of each individual bag in a continuous package work that is continuously wound, and to perform an empty bag inspection and a missing item inspection in real time and continuously.

Japanese Utility Model Laid-Open No. 62-10085 JP 2013-19688 A

According to the weight sorter disclosed in Patent Document 1, although it is possible to determine whether or not the number of articles contained in the packed product is the regular number, it is possible to determine whether the number of articles contained in the packed product is the regular number. When targeting a product group in which a predetermined number of products containing It was not possible to check for deficiencies.

According to the X-ray mass measuring apparatus disclosed in the above-mentioned Patent Document 2, it is possible to inspect the above-described product group, that is, the continuous package workpiece for missing items. It is expensive and has the following problems. In other words, even if X-rays are used, it is effective if the product contained in the packaging material is powder or liquid in a uniform state, but if the component or material of the product is not uniform, or if the product has a complicated shape. Or, if there are circumstances such as changes in the overlapping posture of items in the packaging material, discrimination by image processing of X-ray transmission images (identification of individual items) will not be stable, and packaging will not be possible. It is not possible to accurately inspect the number of articles in the product.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems in the prior art, and provides a product inspection apparatus and method capable of accurately inspecting the excess or deficiency of the number of articles contained in individual continuous products at low cost. intended to provide.

The product inspection device 1 described in claim 1 is
A product inspection apparatus 1 that weighs a product group G in which a predetermined number of products W each containing a predetermined number of articles A are continuously conveyed, and inspects whether the number of articles A contained in each product W is excessive or insufficient. hand,
a weighing conveyor 2 having a length on which the entire product group G can be placed;
a scale 3 for weighing the product W conveyed to the weighing conveyor 2 and outputting a weighing signal;
a sensor 4 for detecting the product group G carried into the weighing conveyor 2;
a weighing unit 7 for calculating a weighing value corresponding to a product W on the weighing conveyor 2 out of the product group G based on the weighing signal based on the timing at which the sensor 4 detects the product group G;
an excess/deficiency determination unit (9) that determines an excess/deficiency in the number of items contained in each product based on the weight values calculated by the weighing unit for each product in the product group and the difference between the weight values ;
is equipped with

The product inspection apparatus 1 according to claim 2 is the product inspection apparatus 1 according to claim 1,
The weighing unit 7 calculates the weight value of the nth product W from the difference between the nth weight value and the (n-1)th weight value.

The product inspection device 1 according to claim 3 is the product inspection device 1 according to claim 1 or 2,
The weighing unit 7 is provided with setting means 6 for setting a filter for processing the weighing signal according to each timing for calculating the plurality of weighing values.

The product inspection apparatus 1 according to claim 4 is the product inspection apparatus 1 according to any one of claims 1 to 3,
A product group G is composed of two connected products W, and the weighing unit 7 weighs the first product W at the timing when the first product W is placed on the weighing conveyor 2, and weighs the first product W. The second product W is weighed at the timing when the second product W descends from the weighing conveyor 2.例文帳に追加

The product inspection apparatus 1 according to claim 5 is the product inspection apparatus 1 according to any one of claims 1 to 4,
The excess/deficiency determining unit 9 converts the weighed value into the number based on the weight value of one article A, and determines the excess/deficiency based on the allowable number range .

The product inspection method according to claim 6,
A product inspection method for inspecting the excess or deficiency of the number of articles A contained in each product W by weighing while transporting a product group G in which a prescribed number of consecutive products W each containing a prescribed number of articles A are weighed. ,
Based on the weighing signal of the product W being conveyed, the weight value corresponding to each product W and the difference between the weight values are calculated, and the excess or deficiency of the number of items A accommodated in each product W of the product group G is determined. do.

According to the product inspection device described in claim 1 and the product inspection method described in claim 6, the weighing signal output each time each product of the product group is placed on the weighing conveyor determines the weight of the product on the weighing conveyor. It is possible to obtain a plurality of measured values corresponding to each product, and to accurately inspect the excess or deficiency of the number of articles contained in each product based on the plurality of measured values at low cost.

According to the product inspection apparatus described in claim 2, the weighing unit calculates each weighed value of each product that should contain the same regular number of articles, and calculates the difference between each weighed value. If there is a significant difference in each measured value, it is possible to accurately inspect the excess or deficiency of the number of articles contained in each product at a low cost by performing a simple calculation.

According to the product inspection device described in claim 3, the weighing signal can be processed by an appropriate filter according to each timing when the weighing unit acquires a plurality of weighing values. accuracy is improved.

According to the product inspection device described in claim 4, the first product in the product group composed of two connected products is weighed at the timing when the first product is placed on the weighing conveyor, In addition to weighing the first and second products at the timing when the first and second products are placed on the weighing conveyor, the product of the second product is weighed at the timing when the first product gets off the weighing conveyor. can also be weighed, it is possible to more accurately calculate the respective weight values of the first product and the second product in the product group by calculation using these three weighing values.

According to the product inspection apparatus described in claim 5, the determination result of the excess or deficiency of the number of articles contained in each product in the product group is determined not only by the measured value obtained by the weighing unit, but also by the product converted from the measured value. It is possible to easily understand as the number of specific excess and deficiency by the number of .

It is a lineblock diagram of a product inspection device of a 1st embodiment. FIG. 2 is an explanatory diagram of product inspection by the product inspection apparatus of the first embodiment, wherein part (a) is a schematic diagram showing a transport state of a group of products, and part (b) is an output from a scale in the product inspection apparatus. It is a diagram showing the waveform of the weighing signal as a waveform shaped by a filter, and the part (c) calculates the weighing value of each product from the weighing signal of the scale in the control means of the product inspection device, and from these weighing values FIG. 10 is a timing chart for performing processing for determining whether the number of articles is excessive or deficient; FIG. FIG. 10 is an explanatory diagram of product inspection by the product inspection apparatus of the second embodiment, wherein part (a) is a schematic diagram showing the transport state of the product group, and part (b) is an output from the scale in the product inspection apparatus. It is a diagram showing the waveform of the weighing signal as a waveform shaped by a filter, and the part (c) calculates the weighing value of each product from the weighing signal of the scale in the control means of the product inspection device, and from these weighing values FIG. 10 is a timing chart for performing processing for determining whether the number of articles is excessive or deficient; FIG. FIG. 10 is an explanatory diagram of product inspection by the product inspection apparatus of the third embodiment, wherein part (a) is a schematic diagram showing the transport state of the product group, and part (b) is an output from the scale in the product inspection apparatus. It is a diagram showing the waveform of the weighing signal as a waveform shaped by a filter, and the part (c) calculates the weighing value of each product from the weighing signal of the scale in the control means of the product inspection device, and from these weighing values FIG. 10 is a timing chart for performing processing for determining whether the number of articles is excessive or deficient; FIG. FIG. 2A is a diagram for explaining a specific configuration of a product group targeted by the product inspection apparatus of each embodiment, and FIG. FIG. (b) shows a product group composed of a plurality of continuous products.

A first embodiment of the present invention will be described with reference to FIGS. 1, 2 and 5. FIG.
The product inspection apparatus 1 of the first embodiment shown in FIG. 1 is intended for a product group G composed of a plurality of connected products W shown in FIG. 5(a). FIG. 5(a) shows a situation in which two product groups G, G transported by the preceding transport means CV are successively carried into the product inspection apparatus 1. FIG.

A product group G shown in FIG. 5(a) includes two products W each containing four articles A in a packaging material, and the two products W are connected at a part of the packaging material. Here, the product W on the front in the conveying direction is called the front product WF, and the product W on the rear in the conveying direction is called the rear product WR. Connection means that a part of each product W (the packaging material P in this case) is connected to each other. The two products W (WF, WR) that make up product group G are manufactured using product group G as a single unit. Even if they are the same, there is a possibility that an article A that should be included in one product W will be included in the other product W, so it is necessary to inspect this.

The product group G shown on the left side of FIG. 5A is genuine products, while the product group G shown on the right side is non-genuine products. In this irregular product, the total number of products A in the product group G is 8, which is as specified, but one of the four products A to be included in one product WR is the other product WF. Therefore, one product WR has 3 items A, and the other product WF has 5 items A. Looking at each product WR and WF, there is an excess or deficiency in the number of items A. . In such an inspection of the excess or deficiency of the number of articles A in the product group G, it is not possible to detect the excess or deficiency of the number of articles A even if the weight of the product group G is measured. According to the product inspection apparatus 1 and method of the present embodiment, it is possible to accurately inspect the excess or deficiency of the number of articles A in the individual products W constituting the product group G at low cost.

As shown in FIG. 1, the product inspection apparatus 1 of the first embodiment includes a weighing conveyor 2 having a length sufficient for placing the entire product group G, a scale 3 supporting the weighing conveyor 2, and a product group. It has a sensor 4 for detecting G and a control means 5 for controlling the overall product inspection apparatus 1 and determining whether the number of articles A contained in each product W of the product group G is excessive or insufficient.

The scale 3 weighs one or two products W (WF, WR) belonging to one product group G as shown in FIG. and outputs a weighing signal as shown in FIG. 2(b). The waveform of the weighing signal shown in FIG. 2(b) is not the waveform itself of the weighing signal output from the scale 3, but the waveform shaped by a filter described later. In this embodiment, product group G consists of two products W (WF, WR) as shown in FIG. The signal includes the weighing value M1 of one product W weighed when placed on the weighing conveyor 2 (counterpart product WF), and two products W weighed by the weighing conveyor 2 (counterpart product WF, back product WR). and a weight value M3 of one product W (rear product WR) weighed when coming down from the weighing conveyor 2. . As shown in FIG. 1, a weighing signal from the scale 3 is input to the control means 5 .

As shown in FIG. 1, the sensor 4 is provided at the carry-in position where the product group G is carried onto the weighing conveyor 2, and detects the passage of the product group G as shown in the top row of FIG. 2(c). and output a detection signal. As shown in FIG. 1, the detection signal from the sensor 4 is input to the control means 5 and used to measure the timing for calculating the weight values M1, M2 and M3 described above from the weighing signal output from the scale 3.

In the control means 5 shown in FIG. 1, as shown in FIG. 2(c), the product W on the weighing conveyor 2 is detected based on the rise timing of the detection signal that the sensor 4 detects the product group G. In order to obtain a plurality of measured values M1, M2, M3 (see FIG. 2(b)) from the weighed signal, timing signals are generated as shown in the second and subsequent stages of FIG. 2(c).

Each time indicated by symbols T1, T2, and Ft in FIG.
T1 shown in FIG. 2(c) is the loading time required from when the product group G starts to be placed on the weighing conveyor 2 until the entire product group G is placed. It is predetermined by the transport speed of the weighing conveyor 2 . In addition, T2 is the damage to the weighing conveyor 2 due to the product group G being placed on the weighing conveyor 2 within the time from when the entire product group G is placed on the weighing conveyor 2 to when the leading edge of the product group G leaves the weighing conveyor 2. This indicates the stabilization time required for vibrations to dampen and become suitable for weighing. This T2 is also determined in advance. Further, Ft is a period of time that is set with a starting point that is a predetermined amount of time before the timing of the fall of T2, and is a state suitable for obtaining a weight value by applying a necessary filter to the weighing signal sent from the scale 3. is the filter time for processing to If the weighing signal is digitized, the weight value can be obtained by reading out the weighing data for the time corresponding to this Ft from the buffer memory and performing filter operation.

A filter for processing the weighing signal from the scale 3 is predetermined so that the weighing value can be calculated at the necessary timing.

Each time indicated by symbols T1f, T2f, and Ftf in FIG.
T1f shown in FIG. 2(c) is the loading time required from when the first-party product WF of the product group G starts to be placed on the weighing conveyor 2 until the entire first-party product WF is placed. It is predetermined by the length of the WF in the conveying direction and the conveying speed of the weighing conveyor 2 . T2f indicates the stabilization time when harmful vibrations of the weighing conveyor 2 due to the loading of the product WF of the other party are damped and the state becomes most suitable for weighing, and this T2f is also determined in advance. At this time, T2f is determined within a short period of time from when the entire forward product WF is placed on the weighing conveyor 2 until the backward product WR starts to be placed on the weighing conveyor 2 . Also, Ftf is a filter time similar to Ft, which is set with a starting point that is a predetermined time before the timing of the fall of T2f.
Further, a stabilization time T2r is set between the timing T1r when the entire front product WF descends from the weighing conveyor 2 and the time until the rear product WR starts descending from the weighing conveyor 2, and based on this, the weighing value M3 is calculated. A filter time Ftr is defined.

As shown in FIG. 1 , the control means 5 includes a signal processing section 6 , a weighing section 7 , a number calculating section 8 , an excess/deficiency determining section 9 , a display section 10 and an operation section 11 .

The signal processing unit 6 is setting means for setting necessary filters at the timings of the filter times Ft, Ftf, and Ftr.

The weighing unit 7 weighs the products W on the weighing conveyor 2 based on the timing when the sensor 4 detects the product group G and the predetermined timing such as the loading time T1 and the stabilization time T2. The values M 1 , M 2 , M 3 are obtained from the filtered weighing signal in the signal processor 6 . Of these measured values, the measured value M1 indicates the weight of the former product WF, the measured value M3 indicates the weight of the backward product WR, and the measured value M2 is the total weight of the former product WF and the backward product WR. is shown. Therefore, as described below, the weighing unit 7 obtains the weights of the product WF and the product WR by performing calculations using these measured values M1, M2, and M3, or obtains the weights M1 and M3 from the respective products. It can also be the weight of the product WF and the back product WR. The weight of each product W referred to in the present invention indicates the weight of the content after subtracting the preset weight of the packaging material P (so-called tare subtraction), and the same applies to the following description.

Since the weighing values M1 and M2 become available at the timing corresponding to the weighing value M2 at the judgment timing J2 in FIG. , the weight value M2-M1 can be calculated and the result can be taken as the weight MR of the rear product WR. Then, the difference weight MD between the weight WF of the forward product WF and the weight MR of the backward product WR is calculated. Further, the calculation result of the weighing unit 7 is displayed on the display unit 10 and sent to the number calculation unit 8 .

The number calculation unit 8 has weight data for one article A included in the target product W. FIG. The number calculation unit 8 divides the weight of each product W sent from the weighing unit 7 by the weight of one item A to convert the number of items A contained in the product W into the number of items A included in the product W. The excess or deficiency of the number of items A included can be intuitively grasped. Further, the number calculation unit 8 divides the difference weight MD sent from the weighing unit 7 by the weight MS of one item A, and calculates the difference in the number of items A between the products as the number. The number here is preferably calculated as a value to the first decimal place obtained by rounding off the second decimal place.

The excess/deficiency determination unit 9 stores the normal weight of the product group G, the normal weight of the product W, and an allowable weight range indicating the allowable range for each normal weight. This allowable weight range is predetermined based on the weight MS of one item A included in the product W, and is a value obtained by multiplying the weight MS of one item A by a factor of 0.5 to 0.1. is used to set, for example, (regular weight)±(weight of one piece of article A)×0.5. The permissible weight range for the product W may be set to different values for the destination product WF and the backward product WR. Consideration may be given to setting an asymmetric tolerance range for normal weight, such as a lower coefficient of 0.5 and an upper coefficient of 0.7.

Also, for the difference weight MD between the weight MF of the forward product WF and the weight MR of the backward product WR, a permissible range of (weight of one piece of article A) x 0.5 to 0.8 or less is set, Excess or deficiency is determined not only for the entire product group G, but also for each weight MF and MR of the forward product WF and the backward product WR based on the respective normal weights and allowable weight ranges. As a result, it is possible to more accurately determine the excess or deficiency of the number of articles A contained in the product W using the difference in weight between the products W that should originally contain the same number of articles A. In addition, in the state where each product W is connected like the product group G of this embodiment, if there is an excess or deficiency in the number of any of the products W, the product G will be an irregular product with an excess or deficiency. as a product.

Further, the excess/deficiency determining unit 9 may have data on the regular number of items A contained in the target product W (regular quantity) and an allowable range for this. The excess/deficiency determination unit 9 compares the actual number of articles A of the product W sent from the number calculation unit 8 with the regular input number, determines the excess/deficiency of the number, and displays the result on the display unit 10 . Specifically, for each of the product group G, the former product WF, or the latter product WR, the actual number of items A, the regular number of items included, the difference CD (number) between the number of items A and the regular number of items included, The pass/fail judgment is displayed on the display unit 10 . If the weight MS of one article A is taken as a standard constant value, the number of articles A contained in the product group G or each product W can be converted from each weight. Determining whether the number of items is excessive or deficient by weight based on the weight range corresponds to determining the number of items based on the permitted number of items and the allowable number range.

At the timing corresponding to the measurement value M3 at the judgment timing J3 in FIG. The weight MR of the product WR can also be calculated by the following formula.
Weight MF of the other party's product WF: {M1+(M2-M3)}/2
Weight WR of rear product WR: {M3+(M2-M1)}/2
The procedure for making the determination by converting to the number is the same as described above.

According to this calculation, the weight of the product W is obtained by calculating the average value from the three measured values. becomes more accurate. At the timing corresponding to the weight value M3, all the weight values M1, M2, and M3 are acquired, so calculation is not performed, and the weight values M1 and M3 are simply used as the weight MF of the forward product WF and the weight MF of the backward product WR, respectively. Weight MR can also be used.

According to the product inspection apparatus 1 of the first embodiment, from the weighing signals output each time the products W of the product group G are placed on the weighing conveyor 2, two weights corresponding to the products W on the weighing conveyor 2 are detected. By obtaining one or three measured values one by one, calculating the difference between them, calculating the average value, and other simple calculations, the excess or deficiency of the number of articles A contained in each product W can be accurately determined at low cost. can be inspected.

In addition, since the weighing signal is processed by an appropriate filter according to each timing when the weighing unit 7 acquires two or three weighing values, the accuracy of weighing values is high, and the reliability of determination results is stable. there is

Furthermore, first, the supplier product WF of the product group G is weighed, and then the supplier product WF and the rear product WR are weighed. , more accurate weight values of the forward product WF and backward product WR can be obtained by calculating the average value using these three measured values.

Furthermore, since the display unit 10 indicates not only the weighed value of the articles A contained in each product W of the product group G, but also the excess or deficiency of the number of the articles A, the determination result is easy for the user to understand. There are advantages.

A second embodiment of the present invention will be described with reference to FIG.
Since the configuration of the product inspection apparatus 1 of the second embodiment is substantially the same as that of the first embodiment shown in FIG. 1, the description of the same portions will be repeated by citing FIG. 1 and the description of the first embodiment. The description will focus on the parts that are different from the first embodiment.

The product inspection apparatuses 1 of the second and third embodiments are intended for a product group G composed of a plurality of continuous products W arranged at short intervals as shown in FIG. 5(b). FIG. 5(b) shows a situation in which the two product groups G, G transported by the preceding transport means CV are sequentially carried into the product inspection apparatus 1. As shown in FIG. As will be described later, the number of products W included in the product group G targeted by the second embodiment is two, and the number of products W included in the product group G targeted by the third embodiment is three. be.

Furthermore, FIG.5(b) is demonstrated. A product group G shown in FIG. 5(b) includes three products W each containing five articles A, which is the regular number of items, contained in a bottle, which is a packaging material P. As shown in FIG. The three products W are not connected, are independent of each other, and are arranged in a line with a predetermined short interval. All the products W constituting the product group G shown on the left side of FIG. 5(b) are genuine products, but the product group G shown on the right side includes non-genuine products. That is, in the product group G including the illegal product W, the number of the goods A of the right-hand side product WF is 4, which is one less than the regular quantity. In such an inspection of the excess or deficiency of the number of articles A in each product W of the product group G, a weighing conveyor 2' (not shown) having a short length is normally used and the intervals between the products W are controlled to be widened. Then, in many cases, one product W is placed on the weighing conveyor 2' to obtain the weight, which requires an interval control mechanism and its installation space. In addition, only by measuring the weight of the product group G as a whole, it is possible to determine only the excess or deficiency of the number of articles A in the entire product group G, and it is not possible to detect which product has an excess or deficiency of the number of articles A. As described below, according to the product inspection apparatus 1 and method of the present embodiment, the excess or deficiency of the number of articles A in the individual products W constituting the product group G can be inspected accurately at low cost.

A second embodiment of the present invention will be described with reference to FIGS. 3 and 5. FIG. In the product inspection apparatus 1 of the second embodiment, unlike the first embodiment described with reference to FIG. 3(a) and 3(b). In the weighing signal output from the scale 3, the weighing value M1 of the forward product WF placed on the weighing conveyor 2 and the forward product WF and the backward product WR are conveyed by the weighing conveyor 2. It is common to the first embodiment in that it includes the measured value M2 of two products W weighed at one time.

The control means 5 of the product inspection apparatus 1 of the second embodiment, as shown in FIG. The timing signals of the loading time T1, the stabilization time T2 of the product WF, and the loading time T1f and the stabilization time T2f of the other product WF are generated. The control means 5 may generate the loading time T1 and the stabilization time T2 based on the rising timing of the detection signal at which the sensor 4 detects the rear product WR of the product group G. Based on these timing signals, the weighing value M1 for the first product WF on the weighing conveyor 2 and the weighing value M2 corresponding to the two products W of the product group G (the first product WF and the second product WR) are obtained from the weighing signals.

The weighing unit 7 of the control means 5 calculates the weighing values M1 and M2 corresponding to the products W on the weighing conveyor 2 in the signal processing unit 6 based on the timing of the stabilization times T2 and T2f. is calculated by processing the weighing signal with a filter in the same manner as in .

The weighing unit 7 acquires the weight MF of the product group WF from the measured value M1 at the determination timing J1 in FIG. The weight MF of the forward product WF is subtracted from the result, and the result is taken as the weight MR of the backward product WR. The calculation result of the weighing unit 7 is displayed on the display unit 10 and sent to the number calculation unit 8 .

The number calculator 8 calculates the number C of the articles A included in the product W by dividing the weight of each product W sent from the weighing section 7 by the weight MS of one article A. The excess/deficiency determination unit 9 compares the number of items A of the product W sent from the number calculation unit 8 with the regular number of items A, determines the excess/deficiency of the number of items A, and displays the result on the display unit 10. .

A third embodiment of the present invention will be described with reference to FIG.
Since the configuration of the product inspection apparatus 1 of the third embodiment is substantially the same as that of the second embodiment, similar parts will be described again by citing FIG. 1 and the descriptions of the first and second embodiments. will be avoided, and the description will focus on the parts that are different from the first and second embodiments.

Unlike the second embodiment, the product inspection apparatus 1 of the third embodiment is composed of a plurality of three continuous products W (front product WF, intermediate product WM, and rear product WR) shown in FIG. 5(b). It is targeted at the product group G that is Since the product group G targeted by the product inspection apparatus 1 of the third embodiment consists of three products W (forward product WF, intermediate product WM, and backward product WR), it can be understood from FIGS. , the weighing signal output by the scale 3 includes the weight value M1 when only the first-party product WF is placed on the weighing conveyor 2, and the two products, the first-party product WF and the central product WM, on the weighing conveyor 2. The weight value M2 of the two products W weighed while being conveyed, and the three products weighed while the three products W, the middle product WM, and the rear product WR were being conveyed on the weighing conveyor 2. A metric M3 for W is included.

The control means 5 of the product inspection apparatus 1 of the third embodiment, as shown in FIG. Timing signals are generated for the loading time T1 and stabilization time T2 of G, the loading time T1f and stabilization time T2f of the destination product WF, and the loading time T1m and stabilization time T2m of the intermediate product WM. The control means 5 generates the loading time T1m and the stabilization time T2m of the intermediate product WM based on the rising timing of the detection signal of the intermediate product WM of the product group G, based on the rising timing of the detection signal of the intermediate product WM of the product group G. The loading time T1 and the stabilization time T2 may be generated based on the rise timing of the detection signal detected by the sensor 4 for WR. By these timing signals, the weighing value M1 for the first-party product WF on the weighing conveyor 2, the weighing value M2 for the first two products W in the product group G (the first-party product WF and the intermediate product WM), and the three products of the product group G from the weighing signal.

The weighing unit 7 obtains the weight MF of the supplier's product WF from the measured value M1 at the determination timing J1, and obtains the weight obtained by adding the intermediate product WM to the weight MF of the supplier's product WF from the measured value M2 at the determination timing J2. Subtract the weight MF of the product WF from the sum of the weight MF of the product WF and the weight of the intermediate product WM. The result is taken as the weight MM of the intermediate product WM, and the weight MA of the product group G is obtained from the measurement value M3 at the judgment timing J3. Then, the weight of the two products W on the front side (the weight MF of the front product WF + the weight MM of the intermediate product WM) is subtracted, and the result is taken as the weight MR of the rear product WR. The calculation result of the weighing unit 7 is displayed on the display unit 10 and sent to the number calculation unit 8 .

The number calculation unit 8 divides the weight of each product W sent from the weighing unit 7 by the weight MS of one article A to calculate the number C of the articles A included in the product W. FIG. The excess/deficiency determination unit 9 compares the actual number of items A in the product W sent from the number calculation unit 8 with the regular number of items A included in the product W, and determines the excess/deficiency of the number of items A included in the product W. is displayed on the display unit 10 .
Although the number of products W included in the product group G in the above-described embodiment was two or three, the number is not limited to this and may be four or more. , the weight of the n-th product W (n≤N) can be obtained from the difference between the n-th measurement value and the n-1th measurement value (however, 1 In the case of the th product W, the (n-1)th weighing value is 0.).

As described above, according to the product inspection device 1 of each embodiment of the present invention and the product inspection method using the same, the excess or deficiency of the number of articles A included in each continuous product W is determined by X Low cost compared to using a line inspection device, and high accuracy regardless of the type of article A or the state in the package that may affect the inspection result with the X-ray inspection device. can be inspected.

DESCRIPTION OF SYMBOLS 1... Product inspection apparatus 2... Weighing conveyor 3... Scale 4... Sensor 5... Control means 6... Signal processing part which is a filter setting means 7... Weighing part 8... Number calculation part 9... Excess/deficiency determination part A... Goods W... Product WF...Front product WM...Intermediate product WR...Rear product G...Product group P...Packaging material

Claims (6)

A product inspection in which a product group (G) consisting of a predetermined number of continuous products (W) containing a predetermined number of articles (A) is weighed while being transported to inspect the excess or deficiency of the number of articles contained in each product. A device (1),
a weighing conveyor (2) having a length on which the entire product group is placed;
a scale (3) for weighing the product conveyed to the weighing conveyor and outputting a weighing signal;
a sensor (4) for detecting a group of products carried into the weighing conveyor;
a weighing unit (7) for calculating, based on the weighing signal, a weighing value corresponding to a product on the weighing conveyor among the product group based on the timing at which the sensor detects the product group;
an excess/deficiency determination unit (9) that determines an excess/deficiency in the number of items contained in each product based on the weight values calculated by the weighing unit for each product in the product group and the difference between the weight values ;
A product inspection device (1) comprising: The product inspection according to claim 1, wherein the weighing unit (7) calculates the weight value of the nth product (W) from the difference between the nth weight value and the (n-1)th weight value. Device (1). 3. The product inspection apparatus according to claim 1 or 2, further comprising setting means (6) for setting a filter for processing the weighing signal according to each timing at which the weighing unit (7) calculates the plurality of weighing values. 1). A product group (G) is composed of two connected products (W), and the weighing unit (7) weighs the first product at the timing when the first product is placed on the weighing conveyor (2). The product inspection device (1) according to any one of claims 1 to 3, wherein the second product is weighed at the timing when the first product descends from the weighing conveyor (2). 5. Any one of claims 1 to 4, wherein the excess/deficiency judging section (9) converts the measured value into a number based on the weight value of one article (A), and judges the excess/deficiency based on an allowable number range. A product inspection device (1) according to any one of the above. A product inspection in which a product group (G) consisting of a predetermined number of continuous products (W) containing a predetermined number of articles (A) is weighed while being transported to inspect the excess or deficiency of the number of articles contained in each product. a method,
A product inspection method that calculates the weight value corresponding to each product and the difference between the weight values based on the weighing signal of the product being conveyed, and determines the excess or deficiency of the number of items contained in each product in the product group.

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