JP6636373B2 - Combination weighing device and combination weighing method - Google Patents

Description

  The present invention relates to a combination weighing device and a combination weighing method for combining, for example, small bundles of long vegetables in a predetermined mass range.

  For example, soft leafy vegetables such as chive, spinach, and komatsuna need to be adjusted in mass according to the standard (hereinafter referred to as "metering") to form a bundle, and then shipped. This metering operation is a complicated operation of repeatedly loading and unloading agricultural products on a scale, and the ratio of adjusting the specified mass in a single operation is as low as 20% or less even for a skilled worker.

  2. Description of the Related Art Conventionally, a method of metering a predetermined mass by combining a small amount has been performed in the food field and the like. For example, Patent Document 1 discloses a combination that obtains an optimum combination by combining a main balance and a sub-balance. A metering device is disclosed.

  Patent Literature 2 and Patent Literature 3 disclose a combination weighing device that preferentially selects and discharges an object to be weighed that has stayed in a non-selected state.

JP 2013-234928 A JP-A-58-55820 Japanese Patent No. 2975091

  However, the metering device of Patent Document 1 requires a plurality of weighing units including a main weigher and a plurality of sub-weighers, and thus has a problem that the device is large and the cost is increased. It is not expected to spread to so-called individual farmers who pack their own size and grade and pack them in boxes.

  Further, Patent Documents 2 and 3 also require a large-scale device provided with a plurality of weighing means, and are not devices with a simple configuration.

  An object of the present invention is to provide a combination weighing device and a combination weighing method that can perform simple metering with a simple structure and without placing or lowering an object on a balance. .

In order to solve the above problem, the present invention is a combination weighing device for selecting a combination having a mass within a preset target range from a plurality of objects to be weighed, a base, and a rotating base. A rotatable plate supported as possible, a plurality of non-bottomed hollow containers fixed to the rotatable plate at predetermined intervals and extending above the base, and rotated by an angle corresponding to the arrangement of the hollow containers. A driving unit that rotationally drives the rotating plate so as to be able to stop each time, a detection unit that detects the input of the object to be weighed into the hollow container, and a detection unit that detects the object to be weighed contained in the hollow container. A combination of a weighing unit that measures the mass, an unloading unit that discharges the weighing object in the hollow container, and the hollow container in which the weighing object has a mass in a target range based on the measurement value of the weighing unit. From the selected hollow container through the removal section. And a control unit that controls to release the object to be weighed, wherein the detection unit is provided at one of stop positions of the hollow container on the base. A combination weighing device is provided.

In the combination weighing device, the weighing unit may be provided at the same stop position of the base as the detection unit. The control unit may control the driving unit such that the detection unit stops the hollow container in which the object to be weighed is not stored.

  The take-out unit may include a take-out port formed in the base, a valve that opens and closes the take-out port, and a chute that guides an object to be weighed discharged from the take-out port. A swing chute may be provided below the chute, and the swing chute may change the direction of the object to be weighed that has passed through the chute. The removal unit may be provided at a stop position of the plurality of hollow containers.

  A discharge unit for discharging a nonstandard product to be weighed in the hollow container may be provided. In that case, the discharge section may be provided at a position different from the take-out section.

  The control unit may cause the object to be weighed in the hollow container to be discharged from the discharge unit when there is no combination having a mass within the target range. In addition, the control unit may discharge the object to be weighed remaining in the hollow container after a predetermined number of calculations or time has elapsed after being charged into the hollow container from the discharge unit. .

  Further, the present invention is a combination weighing method using a combination weighing device, wherein, when the control unit selects a combination of the hollow containers having a mass within a target range, the selected hollow containers are respectively taken out of the extraction unit. To discharge the objects to be weighed sequentially, and after discharging the objects to be weighed, when the empty hollow container in which the objects to be weighed are not detected passes through the detection unit, the object to be weighed is charged. A combination weighing method is provided. In this combination weighing method, the object to be weighed may be charged when the hollow container after discharging the object to be weighed first passes through the detection unit.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to reduce installation cost with a simple structure, metering work can be performed easily.

It is a top view showing an example of a combination weighing device concerning an embodiment of the present invention. It is a side view of FIG. FIG. 2 is a longitudinal sectional view around a driving unit in FIG. 1. FIG. 2 is a vertical cross-sectional view around a weighing unit of FIG. 1. FIG. 2 is a vertical cross-sectional view around a take-out unit in FIG. 1. It is explanatory drawing which shows the example of arrangement | positioning of the load cell concerning embodiment of this invention, (a) shows the case where a load cell is installed in a base, and (b) shows the case where a load cell is installed in a container. It is a flowchart which shows the example of the metering procedure concerning embodiment of this invention. FIG. 4 is a diagram illustrating a procedure for taking out and supplying an object to be weighed according to an embodiment of the present invention. It is a figure showing an example of a calculation order concerning an embodiment of the present invention. FIG. 10 is a diagram illustrating an example of a calculation result within a frame A1 in FIG. 9.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the specification and the drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted.

  1 and 2 show an example of a combination weighing device according to the present invention. In the present embodiment, a device for measuring a long vegetable, for example, leek, as an example of an object to be weighed will be described.

  The combination weighing device 1 includes a base 11, a disk-shaped rotary plate 12 rotatably supported on the base 11, and a plurality of vertically extending through the rotary plate 12, for example, as shown in FIG. Are provided with eight hollow containers 13. In the present embodiment, the hollow container 13 is, for example, a cylindrical body made of PVC, and is disposed at a predetermined angular interval from the rotation center 12a of the rotating plate 12, for example, at an angle interval of 45 ° in the case of eight, and each has a fixture. At 14, it is fixed to the rotating plate 12. The lower end of the hollow container 13 extends to the upper surface of the base 11, and a small gap is formed from the upper surface of the base 11 so as not to come into contact with the base 11 and to prevent an object to be weighed such as a leek from coming out of the gap. Open and attached. The gap between the upper surface of the base 11 and the lower end of the hollow container 13 may be adjusted according to the type of the object to be weighed. When the object to be weighed is leek, the gap is preferably as small as possible, and may be, for example, about 0.5 to 1.0 mm. The hollow containers 13 are respectively numbered and recognized by the control unit 19. The rotating plate 12 is rotationally driven by a driving unit 15 having a motor 31 as shown in FIG. 3, and the next stop possible position corresponds to the arrangement of each hollow container 13, and the next stop position is the previous stop of the adjacent hollow container 13. For example, in the present embodiment, the drive is controlled so that it can be stopped at every 45 ° rotation. Thereby, each hollow container 13 can be stopped every time the hollow container 13 moves by one. However, instead of stopping every time when the hollow container 13 moves by one, two hollow containers 13 can be stopped. Alternatively, the vehicle may stop at a position moved by a plurality of times.

  In the present embodiment, one of the positions where the hollow container 13 stops is an input position 21 where an object to be weighed is input. The loading position 21 is provided with a detection unit 16 for detecting the insertion of leek housed in the hollow container 13 and a measuring unit 17 for measuring the mass of the leek. The detecting unit 16 and the weighing unit 17 include, for example, a load cell 32 as shown in FIG. 4. When the load cell 32 measures the mass of the leek 9, the insertion of the leek 9 is detected at the same time. The number of the container 13 and the mass of the inserted chive 9 are recognized. As described above, the detection unit 16 that detects the insertion of the leek 9 may be also used as the measurement unit 17 or may be provided with, for example, an optical detection unit different from the measurement unit 17.

  The base 11 is provided with a take-out part 18 for taking out the leek in the hollow container 13. As illustrated in FIG. 5, the extraction unit 18 includes an outlet 22 provided in the base 11, a valve 23 that opens and closes the outlet 22, a chute 24 that guides the leek 9 discharged from the outlet 22, A swing chute 25 (see FIG. 2) provided at a lower end of the chute 24 is provided. The swing chute 25 has a U-shaped (groove-shaped) cross section in a direction perpendicular to the longitudinal direction. The outlet 22 is provided at a stop position of the hollow container 13 different from the charging position 21, for example, as shown in FIG. 1, when the rotating plate 12 rotates in the direction of the arrow in the figure, the hollow container 13 is positioned in front of the charging position 21. At a position where it can be stopped. The valve 23 opens and closes the outlet 22 from below the base 11 in response to a signal from the controller 19. The swing chute 25 has a U-shaped open side on the left side at the position of the solid line in FIG. 2, and swings in the direction of the arrow in FIG. 2 to change the direction of the leek 9 descending along the chute 24. By changing the direction to a substantially horizontal direction, the chive 9 is discharged in a substantially horizontal posture. The leek 9 released from the swing chute 25 is bound by, for example, a binding machine 33 to form a bundle of products. Each time the leek 9 is released from one hollow container 13, if the direction of the leek 9 descending along the chute 24 is changed by the swing chute 25, the leek 9 is released from the plurality of hollow containers 13. In addition, the leek 9 does not overlap in the chute 24, and it is possible to prevent the leek 9 from being damaged by a drop impact from above. Further, the work of collecting the leek 9 after the release is facilitated. A commercially available binding machine can be used. Alternatively, for example, a packing machine or a bag packing machine other than the binding machine may be used. The direction of the leek 9 does not have to be a substantially horizontal posture, but may be an angle that facilitates formation of a bundle, packing, and the like. In FIG. 1, the take-out part 18 is provided corresponding to the stop position of one hollow container 13, but the take-out part 18 may be provided at the stop position of a plurality of hollow containers 13. In that case, for example, the take-out port 22 may be provided over three consecutive stop positions, and the chive 9 may be collected at one place by the chute 24. Further, the take-out unit 18 may be provided at a plurality of discontinuous stop positions.

  The drive unit 15, the detection unit 16, the weighing unit 17, and the extraction unit 18 are connected to the control unit 19. The control unit 19 selects a combination of the hollow containers 13 that satisfies a preset target mass based on the measured value of the mass of the leek 9 in the hollow container 13 by the measuring unit 17, and the selected hollow container 13 is taken out by the unloading unit. When it reaches 18, control is performed so as to open the valve 23 of the extraction section 18. The method of calculating the combination will be described later. Further, the control unit 19 determines whether the load cell 32 does not sense the load when the hollow container 13 containing no leek reaches the loading position 21, that is, when the hollow container 13 reaches the loading position 21, The drive unit 15 is controlled so that the rotation of the rotating plate 12 is stopped when the empty hollow container 13 that has been selected as a combination that satisfies the mass and discharges the leek reaches the input position 21.

  Further, the base 11 is provided with a discharge unit 26. The discharge unit 26 includes, for example, a valve and a chute whose opening and closing are controlled by the control unit 19, and is provided at a stop position of the hollow container 13 different from the discharge unit 18 as shown in FIG. 1. What is discharged from the discharge unit 26 is an optimal combination such as an object to be weighed remaining in the hollow container 13 without being selected for a certain time or more, or a case where the target object is thrown in beyond a target range mass. Non-standard objects to be weighed, etc. Thereby, it is possible to prevent a product that has stayed in the hollow container 13 for a long time and has deteriorated in quality to be selected as a product. Conventionally, in order to prevent stagnation for a certain period of time, a method of forcibly selecting an object even when the mass of the object is not in a preferable range has been considered. By providing the unit 26, a combination outside the target range is not selected. Note that the discharge unit 26 may be set at the same position as the extraction unit 18, and a chute different from the extraction unit 18 may be provided to discharge nonstandard products.

  As described above, the present invention has a simple configuration in which the measuring unit 17 is provided at one location, and the plurality of hollow containers 13 that sequentially rotate and move above the measuring unit 17 are controlled by the control unit 19. Compact structure. Furthermore, by making the measuring unit 17 also serve as the detecting unit 16 for detecting the presence or absence of the object to be weighed, the cost can be further reduced and the device can be inexpensive.

  In this combination weighing apparatus 1, the leek 9 as an object to be weighed is in a posture leaning on the hollow container 13, and the measured value of the load is to measure only the mass acting on the lower weighing unit 17 direction. However, this measured value is a linear approximation to the true value of the mass of the object to be weighed. The purpose of the present invention is to make a combination of masses within a certain range such as metering of shipping vegetables and the like, and does not require high precision such as 0.1 g unit. Can be adopted. Therefore, an inexpensive apparatus can be provided with a simple configuration, and widespread use can be achieved in the measurement of vegetables and the like in individual farmers.

  FIG. 6 shows a different embodiment in which metering is performed by one load cell 32. FIG. 6A shows the above-described embodiment, in which a load cell 32 for directly measuring the mass of the leek 9 placed in the hollow container 13 is attached to the base 11. As a different embodiment of the present invention, as shown in FIG. 6B, a load cell 32 for measuring the mass of the mini-container 34 in which the leek 9 is stored may be connected to the control unit 19. In this case, when the worker throws the leek 9 from the mini-container 34 into the hollow container 13, the mass of the thrown leek 9 is calculated from the decrease in the mass of the mini-container 34 and sent to the control unit 19. Only the detection unit 16 including an optical sensor or the like is provided at the insertion position 21.

  Next, a procedure for using the combination weighing device 1 will be described with reference to FIG.

  When the main switch of the combination weighing device 1 is turned on, the rotating plate 12 rotates and the hollow containers 13 sequentially pass through the charging positions 21 to detect the presence or absence of the leek 9 in each hollow container 13 (step S1), and the empty container is emptied. If there is a container, the empty hollow container 13 stops at the charging position 21. When the operator takes out a small bundle from the leek 9 stored in the mini-container 34 or the like and puts it into the hollow container 13 stopped at the loading position 21 (step S2), the load cell 32 performs measurement and detection. . The weighing result is displayed on a display of the control unit 19, for example. When the object to be weighed is leek, the target mass range of the bundle as a product is set to 110 g to 120 g, and usually a small bundle of about 20 to 30 g is put into each hollow container 13. When the accommodation of the leek 9 is detected, the rotating plate 12 is rotated again, and if there is an empty hollow container 13, it is sequentially stopped at the loading position 21, and the worker puts a small bundle of the leek 9 into those hollow containers 13. throw into.

  When the leek 9 is put into all the hollow containers 13, the control unit 19 performs a combination calculation by a preset calculation method from the leek 9 put into the hollow container 13 (step S <b> 3), and sets the target mass and the target mass. When such a combination is found (step S4), the hollow containers 13 of the combination are respectively rotated to the take-out part 18, and the valves 23 are opened to discharge sequentially (step S5). The hollow container 13 in which a combination satisfying the target mass is not found even after a predetermined number of calculations or a predetermined time has elapsed after being put into the hollow container 13, is moved to the discharge unit 26, and the leek 9 is discharged as a nonstandard product ( Steps S6 and S7).

  When the leek 9 is taken out of the selected hollow container 13, first, when the selected first hollow container 13 reaches the take-out part 18, the rotation of the rotating plate 12 is stopped and the valve 23 is opened. Then, after releasing the leek 9 and closing the valve 23, the rotating plate 12 rotates, and the next selected hollow container 13 reaches the extracting portion 18, and similarly releases the leek 9. In order to prevent the leek 9 from being erroneously released from the hollow container 13 not selected, it is preferable that the rotating plate 12 does not rotate when the valve 23 is open. The operation of stopping and releasing the rotation of the rotating plate 12 may be performed by an operator using, for example, a touch panel of the control unit 19, or may be automatically controlled by the control unit 19.

  When the leek 9 is discharged from the extraction unit 18 or the discharge unit 26, the process returns to step S1. That is, when the empty unit 13 is detected to be empty by the detection unit 16 when passing through the charging position 21, the empty container 13 stops there, and the worker stops the hollow container 13 at the charging position 21. Put a small bunch of leek inside. When the leek 9 is put into all the hollow containers 13, the calculation by the control unit 19 is performed.

  The insertion of the leek 9 into the hollow container 13 is a manual operation, and the input amount varies, so that it may not be possible to combine for a long time. In addition, the leek 9 is left in the hollow container 13 for a long time even when the work is interrupted or the work interval is widened. In such a case, the moisture is removed from the chive 9 and the quality deteriorates. Therefore, in this embodiment, the chive 9 stored in the hollow container 13 without being calculated for a specified number of times or selected for a certain time is discharged to the discharge unit. 26. Of the leek 9 discharged from the discharge unit 26, those that can be reused are re-input with adjusted mass, and those whose quality has deteriorated are discarded. If none of the combinations in all the hollow containers 13 fall within the range of the target mass, all the bundles may be temporarily discharged from the discharge unit 26, or may be manually set in any of the hollow containers 13. The combination may be recalculated by removing the leek 9 and reinserting another small bundle, manually operating the control unit 19 and reweighing the mass of the leek 9 in each hollow container 13. Further, for example, even when the leek 9 is put into some of the eight hollow containers 13 and the leek 9 is not put into all the hollow containers 13, the combination is detected when a combination satisfying the target mass is detected. It may be selected and taken out from the take-out unit 18.

  According to the present embodiment, metering can be performed by a simple operation in which an operator directly puts a long vegetable such as leek into a vertically extending hollow container 13 in a standing position. In addition, by setting the leek insertion position 21 at one location and only the empty hollow container 13 stopping at the insertion position 21, the worker does not need to change the position to insert the leek, reducing fatigue, and reducing the size of the small container. It is possible to prevent erroneous insertion into a place where the bundle is stored. Further, if the charging position is determined, the charging can be easily performed using a separate automatic charging device.

  In the above-described procedure, the leek 9 is taken out of all the selected combinations of the hollow containers 13 and then the leek 9 is put into the empty hollow container 13. However, after the leek 9 is taken out. The leek 9 may be inserted when the empty hollow container 13 first passes through the detection unit 16. FIG. 8 is a diagram illustrating an example of a different procedure for taking out and supplying the chive 9 when a combination of three hollow containers 13 is selected.

  FIG. 8 shows an example in which the rotary plate 12 is provided with eight hollow containers A to H, and the take-out portion 18 is provided over the stop positions of three continuous hollow containers. The numerical values of the angles described in (c) to (f) are the total rotation angles of the rotating plate 12 from the initial position shown in (a). As shown in FIG. 8A, when three combinations of B, F, and H are selected as a combination that achieves the mass in the target range, first, as shown in FIG. Is taken out. Next, as shown in (c), when B reaches the detection unit 16 after being rotated by 45 °, it is recognized that the container is an empty container, and the chive is supplied to B. Next, F and H are rotated until they reach the extraction unit 18, and the leek is extracted from F and H. Then, when F and H reach the detection unit 16, it is recognized that the container is empty, and the chive is supplied to F and H, respectively. According to this method, the leek can be taken out and supplied at a rotation angle of less than one rotation (360 °) of the rotating plate 12.

  Next, an example of a combination calculation method by the control unit 19 will be described. In the following description, as a metering method in a combination weighing apparatus having six hollow containers, the six hollow containers numbered 1 to 6 are referred to as A, B, C, D, E, and F, respectively. It will be described as.

<Calculation example 1>
When the objects to be weighed are put into all the hollow containers A to F, it is first determined whether or not the measured value of the hollow container A is equal to or more than the lower limit of the target mass range and equal to or less than the upper limit of the target mass range. If this is satisfied, the hollow container A is provisionally selected. When the measured value of A is lower than the lower limit, a combination of A and the other hollow containers BF that is equal to or more than the lower limit of the target mass range and equal to or less than the upper limit of the target mass range is determined. FIG. 9 shows a combination including the hollow container A among the combinations of the hollow containers A to F, and when the condition of the target mass is “No”, the process proceeds to the lower part of the drawing. In all the combinations, as in the case of the hollow container A alone, if it satisfies the lower limit or more (≧ min), then it is determined whether it satisfies the upper limit or less (≦ MAX). When the selection exceeds the tentative selection and the upper limit value, the selection is not performed. However, in FIG. 9, in the case of a plurality of combinations, these descriptions are omitted, and only the combinations are shown.

  When the measured value of the hollow container A is lower than the lower limit, first, it is determined whether or not the combination A + B with the hollow container B is equal to or more than the lower limit of the target mass range and equal to or less than the upper limit of the target mass range. If A + B satisfies this, a combination of hollow containers A + B is provisionally selected. When A + B is lower than the lower limit, it is calculated whether the combination of A + B and one more hollow container C to F is equal to or more than the lower limit of the target mass range and equal to or less than the upper limit of the target mass range. I do. Here, when there is a combination below the lower limit, the calculation is performed for a combination obtained by adding another hollow container to the combination. Similarly, among the combinations including A + B shown in the frame A1 in FIG. 9, the combination having the smallest mass among the combinations having the lower limit value of the target mass range and the upper limit value of the target mass range is not more than the provisional one. Selected (temporary selection a1). No further addition is performed for combinations that have exceeded the lower limit value of the target mass range during the combination calculation. If the total is less than the lower limit of the target mass range, a warning or the like is displayed on the display of the control unit, and the object to be weighed is discharged once or the object to be weighed is added to the hollow container as appropriate. Then, the objects to be weighed in each of the hollow containers A to F are reweighed and recalculated.

  FIG. 10 shows an example of the calculation result in the frame A1 in FIG. In this example, the measured value of the hollow container A and the measured value of A + B are below the lower limit of the target mass range. When D and E are added to A + B among C to F, they satisfy the lower limit value and the upper limit value of the target mass range. A + B + F is not selected because it is below the lower limit. D, E, and F are further added to A + B + C below the lower limit, and among them, those adding D and E exceed the upper limit, and thus are not selected, and those adding F satisfy the condition. Here, the combination having the smallest mass among the three combinations satisfying the condition is the temporary selection a1 in the frame A1. The temporary selection a1 may be updated to a smaller mass every time a calculation result that satisfies the condition of mass is obtained.

  As shown in FIG. 9, when the weighing value of only A is below the lower limit, after the calculation for determining the tentative selection in the frame A1, the combination A + C with the hollow container C is further reduced to the lower limit of the target mass range. It is determined whether or not this is the case. If A + C is greater than or equal to the lower limit, a combination of hollow containers A + C is provisionally selected, and if A + C is less than the lower limit, all combinations that further include A + C and do not include B are calculated in the same manner as described above ( A frame A2 in FIG. 9, a combination having the smallest mass among those having the target mass range equal to or more than the lower limit value and equal to or less than the upper limit value, and a combination having the smaller mass among the tentative selections a1 and the tentative selection a2. I do.

  Similarly, all combinations that include A + D and do not include B and C (frame A3 in FIG. 9), all combinations that include A + E and do not include B, C, and D (frame A4 in FIG. 9), and A + F (Frame A5 in FIG. 9) is similarly calculated, and the combination having the smallest mass among those having the lower limit value or more and the upper limit value or less of the target mass range is set as the temporary selection a.

  Next, the same calculation is performed for the combination including B and not including A, and the combination having the smallest mass among those having the lower limit and the upper limit of the target mass range, The combination having the smaller mass is referred to as a temporary selection b. Similarly, a combination including C but not including A and B, a combination including D and not including A to C, a combination including E and not including A to D, and F are similarly calculated, and the combinations to be temporarily selected are sequentially determined. Updating, the last remaining combination of the tentative selection f is selected as the combination closest to the lower limit of the target mass range, the corresponding hollow containers are sequentially moved to the take-out part, the valve is opened and the object to be weighed is opened. Release. When comparing combinations, if there are combinations having exactly the same mass, for example, the one with the lower number of the hollow container may be given priority.

  In this metering method, when the total mass is less than the lower limit or exceeds the upper limit of the target mass range in all combinations, the contents of all the hollow containers are discharged from the discharging means, and the objects to be weighed into the hollow containers are discharged. Redo the input. If one hollow container exceeds the upper limit of the target mass range, move the hollow container to the discharge port and discharge it, or display it on the monitor of the control unit so that the operator can see it. Then, the amount of the object to be weighed in the hollow container is manually reduced, and the mass of the leek 9 in the hollow container 13 is re-weighed.

  In this calculation method, since the number of hollow containers to be combined is calculated from the smaller one, if the lower limit of the target mass range is exceeded, no further addition is performed, so that useless calculation can be omitted. In addition, since the combination having the smallest mass within the target mass range is selected from all the combinations, unnecessary objects to be weighed can be minimized.

<Calculation example 2>
As in the calculation example 1, calculation is performed in ascending order of the number of hollow containers and in ascending order of the number of hollow containers to be combined, and two types of target mass range and allowable mass range are set as selection criteria. Keep it. For example, 110 g to 120 g is set as the target mass range, and if none of the combinations having the target mass range is found in all combinations, a combination having a range of, for example, 105 g to 110 g set as the allowable mass range is selected.

<Calculation example 3>
Similarly to the calculation example 1, the calculation is performed in ascending order of the number of the hollow container, and if there is a combination that falls within the target mass range, the combination is selected as it is and discharged from the extraction unit. That is, when a combination that falls within the target mass range is found, one calculation is completed, and the object to be weighed is removed from the selected hollow container. Thereafter, the empty hollow container stops at the charging position, the operator inputs a new object to be measured into the hollow container stopped at the charging position, and performs the following calculation by the combination weighing device.

  This method is selected immediately if it falls within the predetermined mass range, so that a quick metering operation can be performed. Further, in this case, even if the objects to be weighed are not stored in all the hollow containers, if there is a corresponding combination, the metering can be performed more quickly by selecting the combination.

<Calculation example 4>
In a calculation method similar to that of Calculation Example 3, the priority of calculation is set not to the number of the hollow container but to the order in which the objects to be weighed are put. According to this method, the object to be weighed can be prevented from staying in the hollow container for a long time.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this example. It is clear that those skilled in the art can conceive various changes or modifications within the scope of the technical idea described in the claims. It is understood that it belongs to.

  For example, in the above embodiment, the hollow container has a long shape that extends up and down in order to weigh a long vegetable, but may have any shape according to an object to be weighed. The number of hollow containers is not limited to eight, and may be smaller, for example, about five, or nine or more, and can be changed according to cost, accuracy, and the like. Further, the hollow container may be installed not in a direction perpendicular to the rotating plate but in an oblique direction such that the upper portion radially expands with respect to the center of rotation. In that case, since the mass of the object to be weighed may act on the inner wall of the hollow container, the inclination angle of the hollow container may be set according to the desired measurement accuracy.

  Further, in the above-described embodiment, the take-out part is one place, and the selected hollow containers are sequentially moved to the take-out part.However, the take-out ports are provided below the stop positions of all the hollow containers and are selected. The hollow container may be taken out on the spot without moving.

  Further, in the above-described embodiment, an example was described in which the leek discharged from the take-out unit was substantially horizontally tied and bound by the binding machine. However, depending on the type of the object to be weighed, bundling is not necessary, and It may be stored in a container or the like as it is.

  INDUSTRIAL APPLICABILITY The present invention can be applied to various forms of agricultural products and foods, as well as long vegetables, and various articles that are adjusted to a predetermined mass by combining a plurality of objects.

Reference Signs List 1 Combination weighing device 9 Leek 11 Base 12 Rotary plate 13 Hollow container 15 Drive unit 16 Detecting unit 17 Weighing unit 18 Extraction unit 19 Control unit 21 Input position

Claims (12)

A combination weighing device that selects a combination that has a mass in a preset target range from a plurality of objects to be weighed,
A base,
A rotating plate rotatably supported on the base,
A plurality of bottomless hollow containers each fixed to the rotating plate at predetermined intervals and extending above the base ,
A drive unit that rotationally drives the rotating plate so that it can be stopped every time it rotates by an angle corresponding to the arrangement of the hollow containers,
A detection unit that detects the introduction of the object to be weighed into the hollow container,
A measuring unit for measuring the mass of the object to be weighed contained in the hollow container,
An extraction unit that discharges the object to be weighed in the hollow container,
Based on the measurement value of the weighing unit, select the combination of the hollow container that the object to be weighed in the target range, and discharge the object to be weighed from the selected hollow container via the unloading unit. A control unit for controlling the
With
The combination weighing device, wherein the detection unit is provided at one of stop positions of the hollow container on the base.   2. The combination weighing device according to claim 1, wherein the weighing unit is provided at the same stop position of the base as the detection unit. 3.   The said control part controls the said drive part so that the said detection part may stop the said hollow container in which the to-be-measured object is not accommodated, The Claims characterized by the above-mentioned. Combination weighing device.   The take-out unit includes an outlet formed in the base, a valve that opens and closes the outlet, and a chute that guides an object to be weighed discharged from the outlet. The combination weighing device according to any one of claims 1 to 3.   5. The combination weighing device according to claim 4, wherein a swing chute is provided below the chute, and the swing chute changes a direction of the object to be weighed that has passed through the chute. 6.   The combination weighing device according to any one of claims 1 to 5, wherein the take-out unit is provided at a stop position of the plurality of hollow containers.   The combination weighing device according to any one of claims 1 to 6, further comprising a discharge unit configured to discharge a nonstandard product of the object to be weighed in the hollow container.   The combination weighing device according to claim 7, wherein the discharge unit is provided at a position different from the take-out unit.   The said control part discharges the to-be-measured object in the said hollow container from the said discharge part, when there is no combination which becomes the mass in a target range, The one of Claim 7 or 8 characterized by the above-mentioned. 3. The combination weighing device according to item 1.   The control unit, after being charged into the hollow container, the object to be weighed staying in the hollow container after a predetermined number of calculations or time has elapsed, is discharged from the discharge unit, The combination weighing device according to any one of claims 7 to 9. A combination weighing method using the combination weighing device according to any one of claims 1 to 10,
When the control unit selects a combination of the hollow containers having a mass in a target range, the selected hollow containers are moved to the respective extraction units to sequentially discharge the objects to be weighed,
A combination weighing method, characterized in that, after discharging the object to be weighed, the object to be weighed is charged when an empty hollow container in which no object to be weighed is detected passes through the detection unit. 12. The combination weighing method according to claim 11, wherein the object to be weighed is charged when the hollow container after discharging the object to be weighed first passes through the detection unit.