JP2020165804A - Weight sorting device and weighing device used for the same - Google Patents

Abstract

To provide a weight sorting device and a weighing device used for the same, capable of performing the weight sorting of a continuous packed article including the quality determination of each packaged article constituting the continuous packed article.SOLUTION: A weight sorting device includes: weight calculating means (a measuring device 2 and a controller 6A) for calculating the weight of each packaged article while conveying a continuous packaged article formed by connecting a plurality of predetermined packed articles, in which the article is housed in a bag, in a row; and determination means (a controller 6A) for determining whether or not the weight of each packed article calculated by the weight calculating means is within an appropriate range, determining that the continuous packaged article is a good article when the weight of all of the packed articles constituting the continuous packed article is within the appropriate range, and determining that the continuous packaged article is a defective article when the weight of at least one packed article constituting the continuous packed article is out of the appropriate range.SELECTED DRAWING: Figure 1

Description

The present invention relates to a weight sorting device and a weighing device used therein.

Conventionally, a weight sorting device has been used for weight inspection of an object to be weighed such as a package in which an article such as a confectionery is stored in a bag while being transported on a production line. In such a conventional weight sorting device, for example, the weight of the object to be weighed is weighed while being conveyed by a weighing conveyor, and whether the weighed object is a good product or a defective product is determined based on whether or not the measured weight value is within an appropriate amount range. I try to do it. Then, as the object to be weighed, there is a case where a continuous package in which a plurality of packaged articles in which articles are housed in a bag is connected is weighed (see, for example, Patent Documents 1 and 2).

In Patent Document 1, when two weighing conveyors are arranged side by side in the transport direction and a short object to be weighed is weighed, the weighing value by either of the two weighing conveyors is used as the weight value of the object to be weighed. , When weighing an object to be weighed that is longer than either of the two weighing conveyors, such as a continuous package, two weighings when the object to be weighed is passing across the two weighing conveyors. It is described that the weight value of the object to be measured is obtained by adding the measurement values of the conveyor.

Further, Patent Document 2 describes that two conveyors having different machine lengths are arranged side by side in the transport direction, and the upstream conveyor is used as a run-up conveyor and the downstream conveyor is used as a weighing (weighing) conveyor. When measuring short-length objects to be weighed, the positions of the two conveyors can be exchanged, and a short-length conveyor is used as the weighing conveyor to weigh long objects such as packaged products. In this case, it is described that a conveyor with a long machine length is used as a weighing conveyor.

Japanese Patent Application Laid-Open No. 2006-105729 Public Relations Japanese Patent Application Laid-Open No. 2005-187170

In the above-mentioned conventional configuration, it is possible to weigh the entire packaged product and determine whether or not a predetermined amount of articles are contained in the entire packaged product (weight selection of the entire packaged product). It is not possible to determine whether or not a predetermined amount of articles are contained in the individual packages constituting the package (good or bad judgment of each package). For example, even if the weight of the entire packaged product is appropriate, the weight of each packaged product may be excessive or insufficient. Therefore, normally, instead of using a weight sorting device, an X-ray inspection device is used to determine the quality of the packaged product, including the quality determination of each packaged product. In this case, there is a problem that an expensive X-ray inspection device is required.

The present invention has been made to solve the above-mentioned problems, and is a weight sorting device capable of performing weight sorting of a series of packaged products including a quality judgment of each packaged product constituting the packaged product, and its use. It is intended to provide a weighing device that can be used.

In order to achieve the above object, the weight sorting device according to an aspect of the present invention measures the weight of each packaged item while transporting a predetermined number of packaged items in which the articles are contained in a bag. It is determined whether or not the weight calculation means to be calculated and the weight of each packaged product calculated by the weight calculation means are within the appropriate amount range, and the weights of all the packaged products constituting the continuous packaged product are within the appropriate amount range. If it is inside, it is determined that the packaged product is a good product, and if the weight of at least one packaged product constituting the packaged product is out of the appropriate amount range, the packaged product is determined to be a defective product. It is provided with a determination means for performing.

According to this configuration, it is determined whether the packaged product is a good product or a defective product according to whether or not the weight of each packaged product constituting the packaged product is within the appropriate amount range of the packaged product. I try to do it. Therefore, an appropriate amount of articles are stored in each packaged product judged to be a non-defective product, and the weight of the packaged product can be sorted including the quality judgment of each packaged product constituting the packaged product. It can be done, and it is not necessary to use an expensive X-ray inspection device.

The packaged product is composed of n pieces (n is a predetermined integer of 2 or more) of the packaged product, and the weight calculating means has a conveyor for transporting the packaged product, and the packaged product is used. When the number of each of the n and nk (k is an integer from 1 to n-1) of the packaged product constituting the packaged product while being conveyed is on the conveyor, the respective number of the packaged products. To have a weighing device configured to measure the weight of the packaged product, and a calculation means for calculating the weight of each packaged product constituting the continuous packaged product based on the measurement result of the weighing device. It may be configured as.

According to this configuration, one weighing device is configured to measure the weight of each of n and nk (k is an integer from 1 to n-1). , The entire device can be miniaturized.

The packaged product is composed of n pieces (n is a predetermined integer of 2 or more) of the packaged product, and the weight calculating means has a first conveyor for transporting the packaged product, and the packaged product has a first conveyor for transporting the packaged product. When the number of each of the nk pieces (k is each integer from 1 to n-1) constituting the continuous package while transporting the package is on the first conveyor, the said. A first weighing device configured to measure the weight of each number of the packaged products, and a second measuring device provided alongside the first conveyor in the transport direction of the packaged products to transport the packaged products. When all the n packaged products constituting the packaged product are on the second conveyor while transporting the packaged product, the weights of all the n packaged products are measured. It has a second weighing device configured to perform the above, and a calculation means for calculating the weight of each packaged product constituting the continuous package based on the measurement results of the first and second weighing devices. It may be configured as follows.

Further, the measuring device according to an aspect of the present invention has a conveyor for transporting a series of packaged products in which n packaged products (n is a predetermined integer of 2 or more) in which articles are housed in a bag. When each of the nk (k is an integer from 1 to n-1) of the packaged products constituting the packaged product is on the conveyor while transporting the packaged product, each of the packaged products is carried. It is configured to weigh a number of the packages.

The present invention provides a weight sorting device having the configuration described above and capable of performing weight sorting of the packaged product including quality determination of each packaged product constituting the packaged product, and a weighing device used therein. It has the effect of being able to do it.

FIG. 1 is a schematic configuration diagram showing an example of the weight sorting apparatus of the first embodiment. FIG. 2 is a diagram showing some examples of a plurality of measurement positions of the weight of the object to be weighed in the weight sorting apparatus shown in FIG. FIG. 3 is a schematic configuration diagram showing an example of the weight sorting apparatus of the second embodiment. FIG. 4 is a diagram showing some examples of a plurality of measurement positions of the weight of the object to be weighed in the weight sorting apparatus shown in FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following, the same or corresponding elements will be designated by the same reference numerals throughout the drawings, and duplicate description thereof will be omitted. Further, the present invention is not limited to the following embodiments.

(First Embodiment)
FIG. 1 is a schematic configuration diagram showing an example of the weight sorting apparatus of the first embodiment.

The weight sorting device A includes a sending conveyor 1, a weighing device 2, a sending conveyor 3, an object detection sensor 4, a sorting device 5, a controller 6A, and an operation display 7A. There is.

The weighing device 2 includes, for example, a weighing conveyor 2a made of a belt conveyor and a weight sensor 2b including a load cell or the like that supports the measuring conveyor 2a and measures the weight of an object to be conveyed on the measuring conveyor 2a. There is.

The sending conveyor 1 and the sending conveyor 3 are composed of, for example, a belt conveyor. The sending conveyor 1, the measuring conveyor 2a, and the sending conveyor 3 are controlled by the controller 6A so as to convey the objects to be measured in the same direction (arrow S direction) at the same speed.

The object to be measured detection sensor 4 is composed of, for example, an area sensor, etc., is installed between the transfer conveyor 1 and the measuring conveyor 2a, detects the object to be measured immediately before being carried into the measuring conveyor 2a, and detects the detection signal. Is output to the controller 6A.

Although the distribution device 5 is provided on the delivery conveyor 3 here, it may be provided on a conveyor (not shown) at a stage after the delivery conveyor 3. As the distribution device 5, a well-known device such as a flipper type distribution device having a distribution arm or an air jet type distribution device can be used.

The controller 6A is composed of, for example, a microcontroller or the like, and has an arithmetic control unit including a CPU or the like and a storage unit including a RAM and a ROM or the like. The CPU of the arithmetic control unit executes the execution program of the CPU stored in the storage unit to control the entire weight sorting device A. All the information and the like required for the controller 6A to control the operation of the weight sorting device A are stored in the internal storage unit, and all the information to be stored during the operation is also stored in the storage unit. .. The controller 6A may be composed of a single controller for centralized control, or may be composed of a plurality of controllers for distributed control in cooperation with each other.

The operation display 7A is an input unit for the user to perform an operation of starting / stopping the operation of the weight sorting device A and an input operation such as a sorting condition described later, and a measured value (measured value) of the weight of the object to be weighed. ) Etc. are provided on the screen (display screen). These input units and display units may be integrally configured using, for example, a touch screen type display, or may be provided separately. The controller 6A inputs a signal from the input unit of the operation display 7A and outputs data or the like to be displayed on the display unit of the operation display 7A.

In FIG. 1, a continuous packaged product W in which two packaged products W1 and W2 are connected is illustrated as an object to be measured, but it may be a continuous packaged product in which a plurality of predetermined packaged products are connected in a row. Each of the packaged products W1 and W2 contains an article in a bag and has a substantially rectangular or square shape when viewed from above (the same applies to the packaged product W3 described later).

The weight calculation means for calculating the weight of each packaged product (W1, W2) is composed of a weighing device 2 and a controller 6A serving as a calculation means. The controller 6A also functions as a determination means for determining whether the packaged product is a non-defective product or a defective product.

Next, an example of the operation of the weight sorting device A of the present embodiment will be described. In the present embodiment, as a sorting condition, for example, an appropriate amount range for the weight of the packaged product (hereinafter, referred to as “appropriate amount range of the packaged product”) is input in advance to the controller 6A by the operation of the operation indicator 7A of the user. Is remembered.

When the operation of the weight sorting device A is started, the sending conveyor 1, the measuring conveyor 2a, and the sending conveyor 3 are driven so as to convey the packaged product W in the arrow S direction at the same transfer speed. Then, the continuous package W, which has been sequentially conveyed by the upstream conveyor (not shown), is carried into the sending conveyor 1, is conveyed from the sending conveyor 1 to the measuring conveyor 2a, and further to the sending conveyor 3, and is not used by the controller 6A. The packaged product W determined to be a good product is excluded from the delivery conveyor 3 by the sorting device 5, and only the packaged product W determined to be a non-defective product is carried out from the delivery conveyor 3 to the downstream conveyor (not shown). Conveyor.

In the present embodiment, the sending conveyor 1, the measuring conveyor 2a, and the sending conveyor 3 carry the continuous package W in the same direction (arrow S direction) as the direction in which the packaged products W1 and W2 constituting the continuous package W are connected. To configure. Therefore, each of the sending conveyor 1, the measuring conveyor 2a, and the sending conveyor 3 constitutes a part of the transport path.

Next, a method of weight sorting (determining whether a non-defective product or a defective product) of the packaged product W by the controller 6A will be described.

The controller 6A detects the time when the head portion of the packaged product W moves to the measuring conveyor 2a based on the detection signal from the object to be measured detection sensor 4, and from this point on, the plurality of packaged products W are predetermined. Derivation (recognition) of each time point of passing (reaching) the measurement position (see FIG. 2 described later), acquiring a measurement value from the weighing device 2 (weight sensor 2b) at the time of passing each measurement position, and each passing time point. The weights of the packaged products W1 and W2 constituting the packaged product W are calculated based on the plurality of measured values obtained in.

Then, the controller 6A determines whether or not the weight of each packaged product W1 and W2 is within an appropriate amount range of the packaged product, and the weights of all the packaged products W1 and W2 constituting the continuous packaged product W are packaged. When the packaged product W is judged to be a non-defective product when it is within the appropriate amount range of the product, and the weight of at least one packaged product (W1, W2) constituting the packaged product W is outside the appropriate amount range of the packaged product. It is determined that the packaged product W is a defective product. Then, the controller 6A controls the sorting device 5 to remove the defective continuous packaged product W from the delivery conveyor 3.

In the controller 6A, the moving distance of the packaged product W from the detection of the head portion of the packaged product W by the object to be measured sensor 4 to the arrival at each of the plurality of measurement positions is stored in advance. Then, based on the moving distance to each measurement position and the transport speed of the packaged product W by the conveyors 1, 2a, and 3, a plurality of measurements are performed from the time when the head portion of the packaged product W is transferred to the measuring conveyor 2a. The travel time to the time of passing (reaching) the position is calculated in advance. Then, from the time when the head portion of the packaged product W detected by the object to be measured sensor 4 moves to the measuring conveyor 2a, the movement time to each measurement position is measured by using a timer, and each packaged product W is measured. It is possible to derive (recognize) the time point at which the measurement position is passed (reached).

FIG. 2 is a diagram showing some examples of a plurality of measurement positions of the weight of the object to be measured (continuous package) in the weight sorting device A shown in FIG. In FIG. 2, the sending conveyor area D1, the measuring conveyor area D2, and the sending conveyor area D3 are areas corresponding to each of the sending conveyor 1, the measuring conveyor 2a, and the sending conveyor 3, as shown in FIG.

Each of the examples (1) and (2) of FIG. 2 is a case where two packaged products W1 and W2 are connected to each other as shown in FIG.

In the case of (1) of FIG. 2, two measurement positions a and b are determined, and the first measurement position a is a predetermined position where the entire packaged product W exists on the measuring conveyor 2a, and this position. The total weight of the packaged product W is measured by the weighing device 2 (weight sensor 2b) when the packaged product W passes through. The next measurement position b is a position where the boundary portion between the packaged product W1 and the packaged product W2 reaches the boundary between the measuring conveyor 2a and the sending conveyor 3, and the weight sensor when the packaged product W passes through this position. The weight of the package W2 is measured by 2b. In the controller 6A, the weight of the packaged product W1 is calculated by subtracting the weight of the packaged product W2 from the total weight of the packaged product W.

Further, in the case of (2) of FIG. 2, two measurement positions c and d are determined, and at the first measurement position c, the boundary portion between the packaged product W1 and the packaged product W2 is the transfer conveyor 1 and the measuring conveyor. It is a position that reaches the boundary with 2a, and when the packaged product W passes through this position, the weight of the packaged product W1 is measured by the weight sensor 2b. The next measurement position d is a predetermined position where the entire packaged product W exists on the measuring conveyor 2a, and when the packaged product W passes through this position, the weight sensor 2b measures the total weight of the packaged product W. Be measured. In the controller 6A, the weight of the packaged product W2 is calculated by subtracting the weight of the packaged product W1 from the total weight of the packaged product W.

Further, as another example of a plurality of measurement positions for the packaged product W, it is possible to combine the measurement position b and the measurement position c. The example of (1) is most preferable in consideration of increasing the transport speed of the packaged product W and improving the measurement accuracy.

Next, each of the examples (3) and (4) of FIG. 2 is a case where the packaged product Wa is a series of three packaged products W1, W2, W3.

In the case of (3) of FIG. 2, three measurement positions e, f, and g are determined, and the first measurement position e is a predetermined position where the entire packaged product Wa exists on the measuring conveyor 2a. When the packaged product Wa passes through this position, the total weight of the packaged product Wa is measured by the weight sensor 2b. The next measurement position f is a position where the boundary portion between the packaged product W1 and the packaged product W2 reaches the boundary between the measuring conveyor 2a and the sending conveyor 3, and the weight sensor when the packaged product Wa passes through this position. The total weight of the packages W2 and W3 is measured by 2b. Further, the next measurement position g is a position where the boundary portion between the packaged product W2 and the packaged product W3 reaches the boundary between the measuring conveyor 2a and the sending conveyor 3, and the weight when the packaged product Wa passes through this position. The weight of the packaged product W3 is measured by the sensor 2b. In the controller 6A, the weight of the packaged product W1 is calculated by subtracting the total weight of the packaged products W2 and W3 from the total weight of the packaged product W. Further, the weight of the packaged product W2 is calculated by subtracting the weight of the packaged product W3 from the total weight of the packaged products W2 and W3.

Further, in the case of (4) of FIG. 2, three measurement positions h, i, and j are determined, and at the first measurement position h, the boundary portion between the packaged product W1 and the packaged product W2 is the transfer conveyor 1. It is a position that reaches the boundary with the measuring conveyor 2a, and the weight of the packaged product W1 is measured by the weight sensor 2b when the packaged product Wa passes through this position. The next measurement position i is a position where the boundary portion between the packaged product W2 and the packaged product W3 reaches the boundary between the sending conveyor 1 and the measuring conveyor 2a, and the weight when the packaged product Wa passes through this position. The total weight of the packages W1 and W2 is measured by the sensor 2b. Further, the next measurement position j is a predetermined position where the entire packaged product W exists on the measuring conveyor 2a, and when the packaged product Wa passes through this position, the total weight of the packaged product W is measured by the weight sensor 2b. Is measured. In the controller 6A, the weight of the packaged product W3 is calculated by subtracting the total weight of the packaged products W1 and W2 from the total weight of the packaged product W. Further, the weight of the packaged product W2 is calculated by subtracting the weight of the packaged product W1 from the total weight of the packaged products W1 and W2.

Further, as another example of a plurality of measurement positions for the packaged product Wa, an example in which the measurement position e (= j), the measurement position f, and the measurement position i are combined, the measurement position e (= j) and the measurement position g It is also possible to use an example in which the measurement position h is combined with the measurement position h. The example of (3) is most preferable in consideration of increasing the transport speed of the packaged product Wa and improving the measurement accuracy.

In each of the examples (1) to (4) of FIG. 2 above, the controller 6A is of all the packaged products (W1, W2 / W1, W2, W3) constituting the continuous packaged product (W / Wa). It is determined whether the continuous packaged product (W / Wa) is a good product or a defective product according to whether or not the weight is within the appropriate amount range of the packaged product.

An appropriate amount range (hereinafter referred to as "appropriate amount range of the packaged product") for the weight (total weight) of the packaged product (W / Wa) is input in advance to the controller 6A by operating the operation display 7A. As a reminder, in the controller 6A, for the continuous packaged product (W / Wa) in which the total weight of the continuous packaged product (W / Wa) is within the appropriate amount range of the continuous packaged product (W / Wa), all the packaged products (W / Wa) W1, W2 / W1, W2, W3) to determine whether the packaged product (W / Wa) is a good product or a defective product depending on whether the weight of the packaged product is within the appropriate amount range of the packaged product. If the total weight of the packaged product (W / Wa) is out of the appropriate amount range of the packaged product, the packaged product (W / Wa) is judged to be defective and is not directly measured. It may not be possible to calculate the weight of. Here, when the total weight of the packaged product (W / Wa) is outside the appropriate amount range of the packaged product, the weight of at least one packaged product (W1, W2 / W1, W2, W3) is the weight of the packaged product. It is out of the appropriate amount range. The appropriate amount range of the continuous packaged product is a range different between the continuous packaged product W and the continuous packaged product Wa.

In the present embodiment, the continuous packaged product is a good product or a defective product, depending on whether or not the weight of all the packaged products constituting the continuous packaged product (W / Wa) is within the appropriate amount range of the packaged product. I try to judge if there is. Therefore, an appropriate amount of articles are contained in each packaged product judged to be a non-defective product, and the weight of the packaged product can be sorted including the quality judgment of each packaged product constituting the packaged product. it can. For example, in the case of producing a continuous package in which a predetermined number of articles of substantially the same weight are contained in each package, a good product can be obtained by determining an appropriate range of the weight of the package when the predetermined number of articles are contained. The same predetermined number of articles are contained in each package of the packaged product determined to be, and even if the total weight of the packaged product is within the appropriate amount range of the packaged product, the article contained in each packaged product It is possible to determine that a packaged product having a variation in the number of products is a defective product. In this way, the weight of the packaged product can be sorted including the quality judgment of each packaged product, and it is not necessary to use an expensive X-ray inspection device.

Further, in the present embodiment, since the weighing device is configured to use only one weighing device 2, the entire device can be miniaturized.

Further, in the present embodiment, a continuous packaged product (W / Wa) composed of two or three packaged products has been described as an example. Here, assuming that n is a predetermined integer of 2 or more and the packaged product is composed of n packaged products, for example, in the case of each of the examples (1) to (4) shown in FIG. The weighing device 2 is used when only n and nk (k is an integer from 1 to n-1) of the packaged products constituting the continuous package are on the measuring conveyor 2a. It is configured to weigh a number of packages.

(Second Embodiment)
FIG. 3 is a schematic configuration diagram showing an example of the weight sorting apparatus of the second embodiment.

The weight sorting device shown in FIG. 3 has a configuration including two weight sorting device units B and C.

The weight sorting device unit B has almost the same configuration as the weight sorting device A shown in FIG. 1, and includes a sending conveyor 1, a weighing device 2 (first weighing device), a sending conveyor 3, and an object to be measured. It includes a sensor 4, a sorting device 5, a controller 6B, and an operation display 7B.

Further, the weight sorting device unit C arranged in front of the weight sorting device unit B includes a feeding conveyor 11, a weighing device 12 (second weighing device) having a weighing conveyor 12a and a weight sensor 12b, and an object to be weighed. It includes a detection sensor 14, a controller 6C configured to be able to communicate with the controller 6B, and an operation display 7C. Here, the transfer conveyor 11, the weighing device 12, and the object to be measured sensor 14 have the same configurations as the transfer conveyor 1, the measuring device 2, and the object to be detected sensor 4, respectively. The object to be measured sensor 14 is installed between the transfer conveyor 11 and the measuring conveyor 12a, detects the object to be measured immediately before being carried into the measuring conveyor 12a, and outputs the detection signal to the controller 6C. ..

Further, as the operation indicators 7B and 7C of the weight sorting devices B and C, those having the same configuration as the operation indicators 7A of the weight sorting device A shown in FIG. 1 can be used.

Further, as the controllers 6B and 6C of the weight sorting device units B and C, substantially the same as the controller 6A of the weight sorting device A shown in FIG. 1 can be used, but the internal processing thereof is different.

The transfer conveyor 11 and the weighing conveyor 12a of the weight sorting device unit C are controlled so as to convey the object to be weighed in the same direction (arrow S direction) at the same speed as the conveyors 1, 2a, 3 controlled by the controller 6B. It is controlled by the vessel 6C.

In FIG. 3, as in FIG. 1, a continuous package W in which two packaged products W1 and W2 are connected is illustrated as an object to be measured, but a continuous packaged product in which a predetermined plurality of packaged items are connected in a row is used. All you need is.

The weight calculating means for calculating the weight of each packaged product (W1, W2) is composed of measuring devices 2 and 12 and a controller 6B serving as a calculation means. The controller 6B also functions as a determination means for determining whether the packaged product is a non-defective product or a defective product.

Next, an example of the operation of the weight sorting device of the present embodiment will be described. In the present embodiment, as a sorting condition, for example, an appropriate amount range for the weight of the packaged product (hereinafter, referred to as “appropriate amount range of the packaged product”) is input in advance to the controller 6B by the operation of the operation display 7B of the user. Is remembered.

In this weight sorting device, when the operation is started, the sending conveyor 11, the measuring conveyor 12a, the sending conveyor 1, the measuring conveyor 2a, and the sending conveyor 3 convey the packaged product W in the arrow S direction at the same transfer speed. Driven to do. Then, the packaged product W sequentially conveyed by the upstream conveyor (not shown) is carried into the transfer conveyor 11, and is sent from the transfer conveyor 11 through the measuring conveyor 12a, the sending conveyor 1, and the measuring conveyor 2a. The packaged product W, which is conveyed to the controller 6B and determined to be defective by the controller 6B, is excluded from the delivery conveyor 3 by the sorting device 5, and only the packaged product W determined to be non-defective is downstream from the transmission conveyor 3. It is carried out to a conveyor (not shown).

In the present embodiment, the sending conveyor 11, the measuring conveyor 12a, the sending conveyor 1, the measuring conveyor 2a, and the sending conveyor 3 have the continuous package W in the same direction as the direction in which the packaged products W1 and W2 constituting the continuous package W are connected. A transport path for transporting in the direction of arrow S) is configured. Therefore, each of the sending conveyor 11, the measuring conveyor 12a, the sending conveyor 1, the measuring conveyor 2a, and the sending conveyor 3 constitutes a part of the above-mentioned transport path.

Next, a method of weight sorting (determining whether a non-defective product or a defective product) of the packaged product W by the controller 6B will be described.

The controller 6C detects the time when the head portion of the packaged product W moves to the measuring conveyor 12a based on the detection signal from the object to be measured detection sensor 14, and from this point on, the entire packaged product W is the measuring conveyor 12a. The time point of passing (reaching) the predetermined measurement position existing above is derived (recognized), and the measuring value (total weight of the packaged product W) is acquired from the measuring device 12 (weight sensor 12b) at the time of passing. The total weight of the packaged product W is transmitted to the controller 6B.

The controller 6B detects the time when the head portion of the packaged product W moves to the measuring conveyor 2a based on the detection signal from the object to be measured detection sensor 4, and the packaged product W is measured in advance from this point. The time point of passing (reaching) the position (see FIG. 4 described later) is derived (recognized), and at that time point, the measuring value (some packaged products constituting the packaged product W) is measured from the measuring device 2 (weight sensor 2b). The weight of each packaged product W1 and W2 constituting the packaged product W is calculated based on the measured value and the total weight of the packaged product W received from the controller 6C. There is.

Then, the controller 6B determines whether or not the weight of each packaged product W1 and W2 is within an appropriate amount range of the packaged product, and the weights of all the packaged products W1 and W2 constituting the continuous packaged product W are packaged. When the packaged product W is judged to be a non-defective product when it is within the appropriate amount range of the product, and the weight of at least one packaged product (W1, W2) constituting the packaged product W is outside the appropriate amount range of the packaged product. It is determined that the packaged product W is a defective product. Then, the controller 6B controls the sorting device 5 to remove the defective continuous packaged product W from the delivery conveyor 3.

In the controller 6C, the moving distance of the packaged product W from the time when the head portion of the packaged product W is detected by the object to be measured sensor 14 to the time when the packaged product W reaches the measurement position is stored in advance. Then, based on the moving distance to the measurement position and the transport speed of the packaged product W, the moving time from the time when the head portion of the packaged product W moves to the measuring conveyor 12a to the time when it passes (reaches) the measurement position. Is calculated in advance. Then, the moving time from the time when the head portion of the packaged product W detected by the object to be measured sensor 14 moves to the measuring conveyor 2a to the measurement position is measured by using a timer, and the packaged product W is the measurement position. It is possible to derive (recognize) the time point when passing (reaching).

Similarly, in the controller 6B, the moving distance of the continuous package W from the detection of the head portion of the continuous package W by the object to be measured sensor 4 to the arrival at the measurement position is stored in advance, and the movement distance is stored. Based on the above and the transport speed of the packaged product W, the moving time from the time when the head portion of the packaged product W moves to the measuring conveyor 2a to the time when it passes (reaches) the measurement position is calculated in advance. Then, the moving time from the time when the head portion of the packaged product W detected by the object to be measured sensor 4 moves to the measuring conveyor 2a to the measurement position is measured by using a timer, and the packaged product W is the measurement position. It is possible to derive (recognize) the time point when passing (reaching).

FIG. 4 is a diagram showing some examples of a plurality of measurement positions of the weight of the object to be measured (continuous package) in the weight sorting apparatus shown in FIG. In FIG. 4, the measuring conveyor area D10, the sending conveyor area D11, the measuring conveyor area D12, and the sending conveyor area D13 are the measuring conveyor 12a, the sending conveyor 1, the measuring conveyor 2a, and the sending conveyor 3, respectively, as shown in FIG. This is the area corresponding to.

Each of the examples (1) and (2) of FIG. 4 is a case where two packaged products W1 and W2 are connected to each other as shown in FIG.

In the case of (1) of FIG. 4, two measurement positions a and b are determined, and the first measurement position a is a predetermined position where the entire packaged product W exists on the measuring conveyor 12a, and this position. The total weight of the packaged product W is measured by the weighing device 12 (weight sensor 12b) when the packaged product W passes through, and the measured value of the total weight is transmitted from the controller 6C to the controller 6B. The next measurement position b is a position where the boundary portion between the packaged product W1 and the packaged product W2 reaches the boundary between the measuring conveyor 2a and the sending conveyor 3, and when the continuous packaged product W passes through this position, the measuring device The weight of the packaged product W2 is measured by 2 (weight sensor 2b). In the controller 6B, the weight of the packaged product W1 is calculated by subtracting the weight of the packaged product W2 from the total weight of the packaged product W.

Further, in the case of (2) of FIG. 4, two measurement positions c and d are determined, and the first measurement position c is a predetermined position where the entire packaged product W exists on the measuring conveyor 12a. When the packaged product W passes through this position, the weight sensor 12b measures the total weight of the packaged product W, and the measured value of the total weight is transmitted from the controller 6C to the controller 6B. The next measurement position d is a position where the boundary portion between the packaged product W1 and the packaged product W2 reaches the boundary between the sending conveyor 1 and the measuring conveyor 2a, and the weight when the packaged product W passes through this position. The weight of the package W1 is measured by the sensor 2b. In the controller 6B, the weight of the packaged product W2 is calculated by subtracting the weight of the packaged product W1 from the total weight of the packaged product W.

The example of (1) is preferable to (2) in consideration of increasing the transport speed of the packaged product W and improving the measurement accuracy.

Next, each of the examples (3) and (4) in FIG. 4 is a case where the packaged product Wa is a series of three packaged products W1, W2, and W3.

In the case of (3) of FIG. 4, three measurement positions e, f, and g are determined, and the first measurement position e is a predetermined position where the entire packaged product Wa exists on the measuring conveyor 12a. When the packaged product Wa passes through this position, the weight sensor 12b measures the total weight of the packaged product Wa, and the measured value of the total weight is transmitted from the controller 6C to the controller 6B. The next measurement position f is a position where the boundary portion between the packaged product W1 and the packaged product W2 reaches the boundary between the measuring conveyor 2a and the sending conveyor 3, and the weight sensor when the packaged product Wa passes through this position. The total weight of the packages W2 and W3 is measured by 2b. Further, the next measurement position g is a position where the boundary portion between the packaged product W2 and the packaged product W3 reaches the boundary between the measuring conveyor 2a and the sending conveyor 3, and the weight when the packaged product Wa passes through this position. The weight of the packaged product W3 is measured by the sensor 2b. In the controller 6B, the weight of the packaged product W1 is calculated by subtracting the total weight of the packaged products W2 and W3 from the total weight of the packaged product W. Further, the weight of the packaged product W2 is calculated by subtracting the weight of the packaged product W3 from the total weight of the packaged products W2 and W3.

Further, in the case of (4) of FIG. 4, three measurement positions h, i, and j are determined, and the first measurement position h is a predetermined position where the entire packaged product Wa is present on the measuring conveyor 12a. When the packaged product Wa passes through this position, the weight sensor 12b measures the total weight of the packaged product Wa, and the measured value of the total weight is transmitted from the controller 6C to the controller 6B. The next measurement position i is a position where the boundary portion between the packaged product W1 and the packaged product W2 reaches the boundary between the sending conveyor 1 and the measuring conveyor 2a, and the weight when the packaged product Wa passes through this position. The weight of the package W1 is measured by the sensor 2b. Further, the next measurement position j is a position where the boundary portion between the packaged product W2 and the packaged product W3 reaches the boundary between the sending conveyor 1 and the measuring conveyor 2a, and when the continuous packaged product Wa passes through this position. The total weight of the packages W1 and W2 is measured by the weight sensor 2b. In the controller 6B, the weight of the packaged product W3 is calculated by subtracting the total weight of the packaged products W1 and W2 from the total weight of the packaged product W. Further, the weight of the packaged product W2 is calculated by subtracting the weight of the packaged product W1 from the total weight of the packaged products W1 and W2.

Further, as another example of a plurality of measurement positions for the packaged product Wa, an example in which the measurement position e (= h), the measurement position g, and the measurement position i are combined, the measurement position e (= j) and the measurement position f. It is also possible to use an example in which the measurement position j and the measurement position j are combined. The example of (3) is most preferable in consideration of increasing the transport speed of the packaged product Wa and improving the measurement accuracy.

In each of the examples (1) to (4) of FIG. 4 above, the controller 6B is used for each packaged product (W / Wa) of all the packaged products (W1, W2 / W1, W2, W3). The weight is calculated, and it is determined whether the continuous packaged product (W / Wa) is a good product or a defective product according to whether or not the weight of all the packaged products is within the appropriate amount range of the packaged product. I am doing it.

The appropriate amount range (hereinafter referred to as "appropriate amount range of the continuous packaged product") for the weight (total weight) of the continuous packaged product (W / Wa) is input to the controller 6C in advance by operating the operation display 7C. When the total weight of the packaged product (W / Wa) is within the appropriate amount range of the packaged product (W / Wa), it is determined that the packaged product (W / Wa) is an appropriate amount and the appropriate amount is stored. If it is out of the range, it is determined that the packaged product (W / Wa) is a non-suitable quantity product, and the determination result is based on the total weight of the packaged product (W / Wa) from the controller 6C to the controller 6B. You may send it to. In this case, the controller 6B further calculates the weight of all the packaged products (W1, W2 / W1, W2, W3) for the packaged product (W / Wa) determined by the controller 6C to be an appropriate amount. However, it is determined whether the continuous packaged product (W / Wa) is a good product or a defective product according to whether or not the weight of all the packaged products is within the appropriate amount range of the packaged product. For the packaged product (W / Wa) determined to be a non-appropriate amount by the controller 6C, the packaged product may be determined to be defective without calculating the weight of each packaged product. .. Here, in the case of a non-appropriate amount product for which the total weight of the packaged product (W / Wa) is determined to be outside the appropriate amount range of the packaged product, at least one packaged product (W1, W2 / W1, W2). The weight of W3) is out of the appropriate amount range of the packaged product. In addition, the appropriate amount range of the packaged product is stored in the controller 6B instead of the controller 6C, and the controller determines whether the packaged product (W / Wa) is an appropriate quantity product or a non-suitable quantity product (defective product). It may be done in 6B. The appropriate amount range of the continuous packaged product is a range different between the continuous packaged product W and the continuous packaged product Wa.

In the present embodiment, as in the first embodiment, the weight of each packaged product constituting the packaged product (W / Wa) is within an appropriate amount range of the packaged product. I try to judge whether it is a good product or a defective product. Therefore, an appropriate amount of articles are stored in each packaged product judged to be a non-defective product, and the weight of the packaged product can be sorted including the quality judgment of each packaged product constituting the packaged product. It can be done, and it is not necessary to use an expensive X-ray inspection device.

Further, in the present embodiment, a continuous packaged product (W / Wa) composed of two or three packaged products has been described as an example. Here, assuming that n is a predetermined integer of 2 or more and the packaged product is composed of n packaged products, for example, in the case of each of the examples (1) to (4) shown in FIG. The weighing device 12 is configured to measure the weight of all n packages (total weight of the package) when all n packages constituting the package are on the measuring conveyor 12a. .. Further, in the weighing device 2, when only the respective number of packaged items of nk (k is each integer from 1 to n-1) constituting the continuous package is on the measuring conveyor 2a, the respective number of packages. It is configured to weigh the packaging.

In addition, since FIG. 3 shows an example using two weight sorting device units B and C, the configuration is provided with two controllers 6B and 6C and two operation indicators 7B and 7C. In the present embodiment, it is also possible to configure the two controllers 6B and 6C with one controller and the two operation indicators 7B and 7C with one operation indicator. It is also possible to eliminate the sending conveyor 1 so that the measuring conveyor 12a and the measuring conveyor 2a are arranged so as to be adjacent to each other.

Further, in the present embodiment, the weighing device 2 is used as the first weighing device for measuring the weight of a part of the packaged products constituting the packaged product, and the weighing device 12 measures the total weight of the packaged product. The second weighing device is used, but the reverse is also possible.

From the above description, many improvements and other embodiments of the present invention will be apparent to those skilled in the art. Therefore, the above description should be construed as an example only and is provided for the purpose of teaching those skilled in the art the best aspects of carrying out the present invention. The details of its structure and / or function can be substantially changed without departing from the spirit of the present invention.

INDUSTRIAL APPLICABILITY The present invention is useful as a weight sorting device capable of performing weight sorting of a series of packaged products including a quality judgment of each packaged product constituting the packaged product, a weighing device used therein, and the like.

A Weight sorting device B, C Weight sorting device 2a, 12a Weighing conveyor 2b, 12b Weight sensor 2,12 Weighing device 6A, 6B, 6C Controller

Claims (4)

A weight calculation means for calculating the weight of each packaged item while transporting a predetermined number of packaged items in which the article is contained in a bag.
It is determined whether or not the weight of each packaged product calculated by the weight calculating means is within the appropriate amount range, and when the weight of all the packaged products constituting the packaged product is within the appropriate amount range, the series A means for determining that the packaged product is a non-defective product and determining that the packaged product is a defective product when the weight of at least one packaged product constituting the packaged product is out of the appropriate amount range.
Weight sorting device equipped with. The packaged product is composed of n (n is a predetermined integer of 2 or more) of the packaged product.
The weight calculation means
Each of n and nk (k is an integer from 1 to n-1) constituting the continuous package while having a conveyor for transporting the continuous package. A weighing device configured to weigh each number of the packages when the number of the packages is on the conveyor.
It has a calculation means for calculating the weight of each packaged product constituting the packaged product based on the measurement result of the measuring device.
The weight sorting device according to claim 1. The packaged product is composed of n (n is a predetermined integer of 2 or more) of the packaged product.
The weight calculation means
Each of the nk pieces (k is an integer from 1 to n-1) constituting the continuous package while carrying the continuous package having a first conveyor for transporting the continuous package. A first weighing device configured to weigh the respective number of the packages when the number of the packages is on the first conveyor.
It has a second conveyor provided alongside the first conveyor in the transport direction of the packaged product to transport the packaged product, and n pieces constituting the packaged product while transporting the packaged product. A second weighing device configured to weigh all n packages when all the packages are on the second conveyor.
It has a calculation means for calculating the weight of each packaged product constituting the packaged product based on the measurement results of the first and second measuring devices.
The weight sorting device according to claim 1. It has a conveyor for transporting a series of packages in which n packages (n is a predetermined integer of 2 or more) in which articles are housed in a bag, and constitutes the packaged products while transporting the packaged products. It is configured to measure the weight of each of the nk pieces (k is each integer from 1 to n-1) when the number of the packaged items is on the conveyor. Weighing device.

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