JP6484052B2 - Combination weighing device - Google Patents

Description

  The present invention relates to a combination weighing device.

  As a conventional combination weighing device, for example, a device described in Patent Document 1 is known. The combination weighing device described in Patent Document 1 includes a plurality of conveying units that convey an article, a plurality of weighing units that measure an article supplied from each conveying unit, an imaging unit that images an article on the conveying unit, Image processing means for judging the transfer status of the article on the transport means based on the imaging signal from the imaging means, prediction means for predicting a change in the supply amount of each article from the transport means based on the transfer status, and a prediction result And a control means for changing the control amount of each conveying means so as to suppress the change in the supply amount from each conveying means.

International Publication No. WO95 / 31702

  In the combination weighing device, in order to increase the weighing accuracy, it is necessary to control the operation of the conveying unit so that the supply amount supplied to the weighing unit becomes the target supply amount. In the conventional combination weighing device, it is predicted whether the supply amount will increase or decrease based on the measurement result in the weighing means or the transfer status in the conveying means, and based on this prediction result, the target supply amount will be obtained. The conveying means is controlled. However, since the feeding force of the conveying means is merely controlled based on whether the supply amount increases or decreases, it cannot be controlled to achieve the target supply amount with high accuracy.

  Therefore, an object of the present invention is to provide a combination weighing device that can improve the weighing accuracy.

  The combination weighing device of the present invention is disposed corresponding to each of a dispersion unit that disperses articles, a plurality of conveyance units that convey articles supplied from the dispersion unit, and a plurality of conveyance units, and is supplied from each conveyance unit A combination weighing device that controls the operation of each conveying unit so that the articles supplied to each weighing unit have a target supply amount. A detection unit that detects the height, a storage unit that stores the relationship between the height of the article, the supply amount of the conveyance unit, and the feed force of the conveyance unit, and the height detected by the detection unit and the target Change to determine whether to change the target supply amount for each transport unit based on the supply amount and the control unit that controls the transport unit with the feed force obtained from the measurement value measured by each weighing unit A determination unit.

  In this combination weighing device, the control unit controls the conveyance unit with the feed force obtained from the height detected by the detection unit and the supply amount that becomes the target supply amount in the relationship stored in the storage unit. . The storage unit stores the relationship between the height of the article, the supply amount of the conveyance unit, and the feeding force of the conveyance unit. With such a configuration, the combination weighing device can control the conveyance unit with an optimum feeding force for achieving the target supply amount. Therefore, in the combination weighing device, articles can be supplied from the transport unit to the weighing unit so as to achieve the target supply amount. As a result, the combination weighing device can improve the weighing accuracy. Further, in the combination weighing device, there are cases where the conveyance status differs for each conveyance unit depending on conditions such as the characteristics of the conveyance unit. In the combination weighing device having this configuration, it is determined whether or not to change the target supply amount for each transport unit based on the measurement value measured by each weighing unit, and the target supply amount is changed according to circumstances. Therefore, it is possible to control the conveyance unit with a more optimal feeding force according to the actual condition of conveyance.

  In one embodiment, the combination weighing device changes a target supply amount based on a measurement value measured by each weighing unit for each transport unit determined to change the target supply amount by the change determination unit. A change unit is further provided.

  In the combination weighing device having this configuration, the target supply amount can be changed based on the measured value measured by each weighing unit, so that the conveying unit is controlled with a more optimal feeding force according to the actual condition of conveyance. be able to.

  In one embodiment, the target supply amount changing unit changes the target supply amount for each transport unit so that the slant amount is related among the plurality of transport units.

  In the combination weighing device having this configuration, the combination is improved when the articles supplied to the weighing unit are combined. Therefore, the measurement accuracy can be increased and the operating rate in the combination weighing device can be increased.

  In one embodiment, the combination weighing device determines whether the conveyance unit can stably supply articles to the weighing unit based on whether the measured value measured by each weighing unit is within a predetermined range. Is further provided for each conveyance unit.

  In the combination weighing device of this configuration, the conveyance unit that cannot stably supply articles to the weighing unit is excluded from the combination target, the user is notified of the conveyance unit that cannot be stably supplied, and a new supply is made based on the degree of stable supply. Since the target supply amount can be changed, the measurement accuracy can be increased as a result.

  In one embodiment, the detection unit detects the height of an article located near the discharge end of the transport unit.

  According to the combination weighing device having this configuration, it is possible to detect the height of the article immediately before being supplied to the weighing unit, that is, the article to be supplied next to the weighing unit. Therefore, it is possible to set the feeding force more appropriately. As a result, the articles can be stably supplied to the measuring unit with the target supply amount.

In one embodiment, the combination weighing device calculates the force P based on the following formula (1), where P is the feeding force, S is the height, and W is the supply amount.
P = A × W / S + B (1)
However, A and B are coefficients.

  In the combination weighing device having this configuration, the feeding force of the transport unit can be uniquely obtained by the above formula (1).

  In one embodiment, in the storage unit, the supply amount W, the coefficient A, and the coefficient B are stored in association with the shape of the article to be supplied and / or the conveyance path of the conveyance unit.

  In the combination weighing device having this configuration, control according to the shape of the article and / or the conveyance path of the conveyance unit can be automatically performed. Therefore, it is possible to save the operator from changing the setting of the coefficient or the like for each shape of the article and / or the conveyance path of the conveyance unit.

  In one embodiment, the combination weighing device further includes an update unit that updates the relationship stored in the storage unit during operation.

  In the combination weighing device having this configuration, for example, the relationship stored in the storage unit can be updated in accordance with a change in the situation such as a change in the supply state of the article from the dispersion unit and a change in the property of the article. Thereby, the feeding force of the transport unit can be controlled based on the updated relationship. Therefore, even if a change occurs in the conveyance status, the articles can be stably supplied to the weighing unit with the target supply amount.

  In one embodiment, the conveyance unit conveys the article by vibration, and the feeding force is an amplitude in the conveyance unit.

  In the combination weighing device having this configuration, the conveyance unit that conveys the article by vibration can control the supply amount of the article by changing the amplitude of the vibration. As a result, the supply amount can be controlled without affecting the driving ability.

  In one embodiment, a plurality of detection units are provided along the conveyance direction of the conveyance unit.

  In the combination weighing device having this configuration, it is possible to predict a future supply amount according to the height along the conveyance path, and thus it is possible to perform more accurate control.

  According to the present invention, it is possible to provide a combination weighing device capable of improving weighing accuracy.

It is a perspective view which shows the combination weighing | measuring apparatus which concerns on one Embodiment. It is a figure which shows the structure of a combination weighing device typically. It is a block diagram which shows the hardware constitutions of a combination weighing device. It is a figure which shows the discharge end vicinity of a radiation feeder. It is a block diagram which shows the functional structure of a control part. It is a graph which shows the relationship between height and supply amount. It is a flowchart which shows an example of the flow of a target supply amount change process. It is a flowchart which shows an example of the flow of a target supply amount calculation process. It is a figure which shows an example of the table memorize | stored in the memory | storage part.

  Hereinafter, an embodiment will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The dimensional ratios in the drawings do not necessarily match those described.

(1) Overall Configuration FIG. 1 is a perspective view of a combination weighing device according to an embodiment. FIG. 2 is a diagram schematically showing the configuration of the combination weighing device. FIG. 3 is a block diagram of the combination weighing device.

  The combination weighing device 1 includes an article supply chute 10, a dispersion table 20, a plurality of radiation feeders 30, a plurality of pool hoppers 40, a plurality of weighing hoppers 50, a collective discharge chute unit 60, a timing hopper 70, And a control unit 80.

  The combination weighing device 1 having the above configuration functions as follows. An article as an object to be weighed of the combination weighing device 1 is conveyed to the combination weighing device 1 by the cross feeder CF. The article is, for example, food. Articles conveyed by the cross feeder CF are put into the article supply chute 10. The articles thrown into the article supply chute 10 are supplied to the dispersion table 20. The dispersion table 20 conveys the article while dispersing the article, and supplies the article to a plurality of radiation feeders 30 arranged around the dispersion table 20. Each of the radiating feeders 30 conveys the articles supplied from the dispersion table 20 to the pool hoppers 40 provided corresponding to the respective radiating feeders 30, and supplies them to the pool hoppers 40.

  The articles supplied to each pool hopper 40 are delivered to a weighing hopper 50 disposed below the pool hopper 40. The control unit 80 performs a combination weighing calculation based on a measurement value (a measurement value of an article in the weighing hopper 50) described later of the weighing hopper 50, and the result of the combination weighing calculation is within a predetermined allowable range. A combination of articles that is closest to the target value is selected. Articles in the weighing hopper 50 included in the selected combination are discharged to the collective discharge chute unit 60. The articles discharged to the collective discharge chute 60 are supplied to the timing hopper 70. The timing hopper 70 supplies articles to, for example, a bag making and packaging machine installed at the subsequent stage of the combination weighing device 1.

(2) Detailed Configuration Next, the configuration of the combination weighing device 1 will be described in detail.

(2-1) Article Supply Chute The article supply chute 10 is an end of the cross feeder CF (see FIG. 2) that puts articles into the article supply chute 10 (the end on the side where articles are put into the article supply chute 10). It is arranged below. The article supply chute 10 is disposed above the dispersion table 20. The article supply chute 10 receives supply of articles conveyed by the cross feeder CF and supplies articles to the distribution table 20.

(2-2) Dispersion table The dispersion table 20 is a table-shaped member formed in a conical shape. The distribution table 20 receives the supply of articles from the cross feeder CF installed above the distribution table 20 via the article supply chute 10. For example, the dispersion table 20 is vibrated by an electromagnet (not shown) to convey the supplied article radially outward while being dispersed in the circumferential direction. The articles conveyed to the outer edge of the dispersion table 20 are supplied to a plurality of radiation feeders 30 arranged below the outer edge side of the dispersion table 20.

(2-3) Radiation Feeder The combination weighing device 1 includes a plurality (14 in this case) of radiation feeders 30. The plurality of radiation feeders 30 are arranged in a ring around the dispersion table 20. The plurality of radial feeders 30 extend radially about the dispersion table 20.

  Each radiation feeder 30 is vibrated by, for example, a driving unit (electromagnet) (not shown), and thereby conveys the article supplied from the dispersion table 20 outward in the radial direction (direction away from the dispersion table 20). The article conveyed to the outer edge of each radiating feeder 30 is supplied to a pool hopper 40 disposed below the outer edge side of each radiating feeder 30.

  Above each radiation feeder 30, a distance measuring sensor (detection unit) 32 is arranged corresponding to each radiation feeder 30. That is, in the first embodiment, 14 distance measuring sensors 32 are provided. The distance measuring sensor 32 is attached to a support frame 34 fixed to the weighing mechanism frame, and is positioned above the radiation feeder 30.

  The distance measuring sensor 32 detects the distance between the distance measuring sensor 32 and the article on the radiation feeder 30. The distance measuring sensor 32 obtains a distance between the distance measuring sensor 32 and the article by, for example, irradiating light toward the article and receiving light reflected by the article. As shown in FIG. 4, the distance measuring sensor 32 detects a distance from an article located near the discharge end of the radiation feeder 30. The vicinity of the discharge end is a position retracted by a predetermined distance from the front end of the radiation feeder 30 in the transport direction, and as an example is a position retracted about 30 mm to 50 mm from the front end of the radiation feeder 30. The distance measuring sensor 32 outputs a detection signal indicating the detected distance to the article to the control unit 80.

(2-4) Pool Hopper The combination weighing device 1 has the same number of pool hoppers 40 as the radiation feeders 30. As shown in FIG. 4, one pool hopper 40 is disposed below the outer edge side of each radiation feeder 30. In the pool hopper 40, articles supplied from the radiation feeder 30 disposed above are temporarily stored.

  A PH gate 42 is provided below each pool hopper 40. By opening the PH gate 42, the articles in the pool hopper 40 are supplied to the weighing hopper 50 disposed below the pool hopper 40. Each PH gate 42 opens and closes when a link mechanism (not shown) is operated by the stepping motor 44. Opening and closing of the stepping motor 44 is controlled by the control unit 80.

(2-5) Weighing hopper The combination weighing device 1 has the same number of weighing hoppers 50 as the pool hopper 40. One weighing hopper 50 is disposed below each pool hopper 40. The weighing hopper 50 measures the mass of the article supplied from the pool hopper 40, that is, the mass of the article supplied from the radiation feeder 30 via the pool hopper 40.

  A WH gate 52 is provided below each weighing hopper 50. By opening the WH gate 52, articles in the weighing hopper 50 are supplied to the collective discharge chute unit 60. Each WH gate 52 opens and closes when a link mechanism (not shown) is operated by a stepping motor 54. Opening and closing of the stepping motor 54 is controlled by the control unit 80.

  Each weighing hopper 50 has a load cell (weighing unit) 56 for weighing articles held by the weighing hopper 50. The load cell 56 is an example of a weighing mechanism. The measurement result of the load cell 56 is transmitted as a measurement signal to the multiplexer 83 of the control unit 80 described later via an amplifier (not shown).

(2-6) Collective discharge chute portion The collective discharge chute portion 60 is an example of a discharge path member. After the combination weighing based on the measurement result of the load cell 56, the collective discharge chute unit 60 is supplied with the weighed articles selected for the combination from the weighing hopper 50. The collective discharge chute unit 60 collects the articles supplied from the weighing hopper 50 and supplies them to the timing hopper 70.

  After the combination weighing based on the measurement result of the load cell 56, the outer chute 64 is supplied with the weighed articles selected for the combination from the weighing hopper 50. The outer chute 64 collects the articles supplied from the weighing hopper 50 and supplies them to the timing hopper 70.

(2-7) Timing Hopper The timing hopper 70 delivers the article supplied from the collective discharge chute 60 to a subsequent bag making and packaging machine or the like. A gate 72 is provided below the timing hopper 70. By opening the gate 72, the articles in the timing hopper 70 are supplied to a subsequent bag making and packaging machine or the like. The gate 72 opens and closes when the link mechanism 74 is operated by the stepping motor 76. Opening and closing of the stepping motor 76 is controlled by the control unit 80.

(2-8) Control Unit The control unit 80 includes a CPU (Central Processing Unit) 81 and a memory 82 such as a ROM (Read Only Memory) and a RAM (Random Access Memory) (see FIG. 2). The control unit 80 includes a multiplexer 83, an A / D converter 84, and a DSP (digital signal processor) 85 (see FIG. 3).

  The multiplexer 83 selects one weighing signal from the weighing signals of the load cell 56 in accordance with a command from the DSP 85 and transmits it to the A / D converter 84. The A / D converter 84 converts the measurement signal (analog signal) received from the multiplexer 83 into a digital signal according to the timing signal transmitted from the DSP 85 and transmits the digital signal to the DSP 85. The DSP 85 performs filter processing on the digital signal transmitted from the A / D converter 84.

  The control unit 80 is connected to each unit of the combination weighing device 1 such as the dispersion table 20, the radiation feeder 30, the stepping motor 44, the stepping motor 54, the stepping motor 76, and the touch panel 86. The touch panel 86 is a liquid crystal display (LCD) having both input and output functions, and functions as an input unit and an output unit. The touch panel 86 receives input such as various settings related to combination weighing. For example, the touch panel 86 receives input of operation parameters such as vibration intensity of the dispersion table 20 and the radiation feeder 30 and vibration time of the radiation feeder 30.

  Based on the operating parameters such as the vibration intensity of the dispersion table 20 and the radiation feeder 30 and the vibration time of the radiation feeder 30 input from the touch panel 86, the control unit 80 uses electromagnets (not shown) of the dispersion table 20 and the radiation feeder 30. The dispersion table 20 and the radiation feeder 30 are vibrated. The operation parameter includes a target supply amount TW of articles supplied from the radiation feeder 30 to the weighing hopper 50 via the pool hopper 40. The target supply amount TW is a target amount (a constant value) of articles to be supplied to the weighing hopper 50 per unit time. The target supply amount TW is set for each article.

  The control unit 80 performs combination weighing calculation based on the measured value in the weighing hopper 50. Specifically, the control unit 80 calculates the mass of the article held in each weighing hopper 50 using the signal filtered by the DSP 85, the total mass is within a predetermined target mass range, and The combination weighing calculation is performed so as to be closest to the target value. Then, the control unit 80 determines the combination of the weighing hopper 50 based on the result of the combination weighing calculation, and controls the operation of the stepping motor 54 so that the WH gate 52 of the determined weighing hopper 50 is opened. In addition, when any of the weighing hoppers 50 is empty, the control unit 80 opens the PH gate 42 of the pool hopper 40 disposed above the weighing hopper 50 by operating the stepping motor 44. Further, the control unit 80 controls opening and closing of the gate 72 of the timing hopper 70.

The configuration of the control unit 80 will be described in more detail. FIG. 5 is a block diagram illustrating a functional configuration of the control unit. 5, the control unit 80 includes a storage unit 90, a feeder control unit 92, an update unit 94, a change determination unit 95, a stable supply determination unit 96, a target supply amount change unit 97, have. The control unit 80 includes a feeder control unit 92, an update unit 94, a change determination unit 95, a stable supply determination unit 96, and a target supply amount change unit 97 as conceptual parts that execute various control processes. Such a conceptual part can be configured as software executed by the CPU 81 by loading a program stored in the ROM onto the RAM, for example.

The storage unit 90 stores the relationship among the article height S, the supply amount W of the radiating feeder 30, and the feeding force P of the radiating feeder 30. Specifically, the storage unit 90 stores the following formula (1).
P = A × W / S + B (1)

  The feed force P is the amplitude of vibration of the radiation feeder 30. When the value of the feeding force P is small, the amplitude is small, so that the amount of articles supplied from the radiation feeder 30 to the weighing hopper 50 (pool hopper 40) is small. When the value of the feeding force P is large, the amplitude becomes large, so that the amount of articles supplied from the radiation feeder 30 to the weighing hopper 50 increases.

  As shown in FIG. 4, the height S is a distance between the bottom surface 30 a of the radiation feeder 30 and the upper part of the article in the vicinity of the discharge end of the radiation feeder 30. The supply amount W is the amount of articles supplied from the radiation feeder 30 to the weighing hopper 50 via the pool hopper 40.

  In the above formula (1), each of “A” and “B” is a coefficient. In the initial state of the combination weighing device 1, the coefficients A and B are given as empirical values as initial values according to, for example, the configuration of the combination weighing device 1. Each coefficient A and B is a value that can be changed according to the shape of the radiation feeder 30 and / or the type of article.

  The feeder control unit 92 controls the feeding force P of the radiation feeder 30. Using the above equation (1), the feeder control unit 92 uses the feed height W obtained from the height S of the article based on the distance detected by the distance measuring sensor 32 and the set target supply amount. The radiation feeder 30 is controlled by the force P. The feeder control unit 92 calculates the height S of the article based on the distance indicated by the detection signal transmitted from the distance measuring sensor 32. Specifically, the feeder control unit 92 calculates the height S of the article based on the difference between the distance from the bottom surface 30a of the radiation feeder 30 to the distance measuring sensor 32 and the distance indicated by the detection signal.

  The feeder control unit 92 calculates the feed force P by substituting the calculated article height S and the supply amount W as the target supply amount into the above equation (1). The feeder control unit 92 controls the operation of the radiation feeder 30 that operates continuously by the calculated feed force P. That is, the feeder control unit 92 controls the operation of the radiating feeder 30 during vibration.

  The update unit 94 updates the equation (1) stored in the storage unit 90 during operation. In operation, for example, an article is supplied to the dispersion table 20 and the article is being conveyed by the radiation feeder 30. The update unit 94 changes the coefficients A and B and updates the above equation (1).

The height S of the article and the measurement value G of the load cell 56 have a relationship represented by the following formula (2).
G = aS (2)
In the above formula (2), “a” is an inclination obtained from the relationship between the height S and the measured value G in a predetermined period. The updating unit 94 calculates the inclination a from the above equation (2) based on the height S and the measured value G obtained during operation. The update unit 94 calculates the slope a for at least two predetermined periods. Further, the inclination a and the feeding force P have the relationship of the following formula (3).
a = (1 / A) P-B / A (3)

  The update unit 94 calculates the coefficients A and B from the feed force P and the inclination a in the current operating state. The updating unit 94 updates the above equation (1) with the calculated coefficients A and B.

  The change determination unit 95 determines whether or not to change the target supply amount TW for each radiation feeder 30 based on the measurement value measured by the load cell 56 that measures the article held in the weighing hopper 50. In the first embodiment, whether or not to change to the new target supply amount TW calculated by the target supply amount change unit 97 based on the degree of stable supply determined based on the stable supply determination unit 96 (whether or not stable supply is possible). Determine whether. For example, when the new target supply amount TW calculated by the target supply amount change unit 97 is different from the current target supply amount TW, the change determination unit 95 sets the calculated new target supply amount TW to the new target supply amount TW. If it is the same as the current target supply amount TW, it is not updated to the calculated new target supply amount TW.

The stable supply determination unit 96 determines, for each radiation feeder 30, whether or not the articles can be stably supplied to each weighing hopper 50 based on the measured value measured by the load cell 56 corresponding to each weighing hopper 50. . Specifically, the stable supply determination unit 96 includes the standard deviation (σ _{1 to} σ _n ) of the transported mass, the average transported mass (X _{1 to} X _n ), the average value σ _t of the standard deviations of all the weighing hoppers 50, and based on the average value X _t of the average transport mass, it determines whether the radiation feeders 30 is made stable supply the articles to the weighing hopper 50.

  In the first embodiment, the stable supply determination unit 96 indicates a variation state between the weighing hoppers 50 of the weighing items conveyed to all the weighing hoppers 50 based on the above numerical values, and the weighing items dispersed by the dispersion table 20 are displayed. The radiating feeder 30 stably supplies articles to the weighing hopper 50 on the basis of the height S indicating the distribution status between the dispersion directions and the index β indicating the variation status for each cycle of the weighing objects conveyed to all the weighing hoppers 50. It is determined for each radiating feeder 30 whether or not it is made. Details of the height S and the index β used by the stable supply determination unit 96 will be described later.

  The target supply amount changing unit 97 changes the target supply amount TW on the basis of the measured value measured by each weighing hopper 50 for each radiation feeder 30 determined to change the target supply amount TW by the change determination unit 95. In the first embodiment, the target supply amount changing unit 97 calculates a new target supply amount TW based on the degree of stable supply determined by the stable supply determination unit 96 (whether stable supply is possible). Further, when calculating the new target supply amount TW, the target supply amount changing unit 97 calculates the target supply amount TW so that the slant amount is related among the plurality of radiation feeders 30.

(3) Operation of Control Unit Next, the operation of the control unit 80 will be described. When the signal for starting the operation of the combination weighing device 1 is input, the control unit 80 starts the operation of the dispersion table 20 and the radiation feeder 30. At the start of the operation, the control unit 80 operates the radiation feeder 30 with the feeding force P set as an initial value in advance.

  The control unit 80 receives the detection signal transmitted from the distance measuring sensor 32 when the distance measuring sensor 32 detects an article located near the discharge end of the radiation feeder 30. The control unit 80 calculates the height S of the article based on the detection signal, and the above formula (1) stored in the storage unit 90 based on the height S of the article and the supply amount W that is the target supply amount. Is used to calculate the feed force P. The control unit 80 controls the radiation feeder 30 with the calculated feed force P. The control unit 80 controls the operation of each radiation feeder 30 by the same process.

  When an article conveyed on the radiation feeder 30 by such control is put into the weighing hopper 50, the control unit 80 performs a combination weighing calculation based on the measured value in the load cell 56 of the weighing hopper 50. Specifically, the control unit 80 calculates the mass of the article held in each weighing hopper 50 using the signal filtered by the DSP 85, the total mass is within a predetermined target mass range, and The combination weighing calculation is performed so as to be closest to the target value. Then, the control unit 80 determines the combination of the weighing hopper 50 based on the result of the combination weighing calculation, and controls the operation of the stepping motor 54 so that the WH gate 52 of the determined weighing hopper 50 is opened. In addition, when any of the weighing hoppers 50 is empty, the control unit 80 opens the PH gate 42 of the pool hopper 40 disposed above the weighing hopper 50 by operating the stepping motor 44. When the article is supplied from the determined weighing hopper 50 to the timing hopper 70, the control unit 80 controls the operation of the stepping motor 76 so that the gate 72 of the timing hopper 70 opens.

  When the weighing of the article is started in the load cell 56 of the weighing hopper 50, the control unit 80 updates the above formula (1) based on the measured value and the height S. Specifically, when receiving a measurement signal transmitted from the load cell 56 within a predetermined period, the control unit 80 uses the measurement value indicated by the measurement signal and the height S of the article to obtain the above formula (2). The inclination “a” is calculated based on The control unit 80 obtains the coefficients A and B by the above equation (3) using the slope “a” obtained within at least two predetermined periods. The control unit 80 updates the above equation (1) with the obtained coefficients A and B.

  In the combination weighing device 1 of the first embodiment, simultaneously with the combination weighing process, a target supply amount determination process for determining whether or not to change the target supply amount TW set in the radiation feeder 30 for each radiation feeder 30 is performed. Is going.

  As shown in FIG. 7, specifically, each time the combination weighing process (step S11) is completed, the change determination unit 95 increments a weighing number counter C indicating the number of times (step S12). Then, it is determined whether the measurement number counter C has reached a predetermined value (for example, 100 times) (step S13). If the measurement number counter C has not reached the predetermined value (S13: NO), the target supply amount change process is skipped and the combination measurement process is continued. In other words, the change determination unit 95 performs the target supply amount changing process once every time the combination weighing process (step S11) is performed 100 times.

When it is determined that the measurement number counter C has reached a predetermined value (S3: YES), the change determination unit 95, for example, performs N (1 to n) measurement hoppers 50 for a predetermined measurement operation. The standard deviation (σ _{1 to} σ _n ) and the average transport mass (X _{1 to} X _n ) of the transported mass during the process are calculated (step S14). Further, based on the calculated standard deviation (σ _{1 to} σ _n ) and average transported mass (X _{1 to} X _n ), the average value σ _t of the standard deviations of all the weighing hoppers 50 and the average value X of the average transported mass _t is calculated.

Next, the target supply amount changing unit 97 calculates a new target supply amount TW based on the standard deviation (σ _{1 to} σ _n ) and the average transfer mass (X _{1 to} X _n ) of the transport mass (step) S15). In the first embodiment, the target supply amount changing unit 97 determines a new target supply amount based on whether or not the stable supply of articles to the weighing hopper 50 in the radiation feeder 30 is determined by the stable supply determination unit 96. TW is calculated (target supply amount calculation process). Hereinafter, the target supply amount calculation process will be described with reference to FIG.

  The stable supply determination unit 96 acquires the height S from the distance measuring sensor 32 (step S21). The height S indicates a variation state between the weighing hoppers 50 of the weighing objects conveyed to all the weighing hoppers 50 when all the radiation feeders 30 are conveyed with a feeding force P having a common target supply amount TW. The distribution situation between the dispersion | distribution directions of the measurement thing disperse | distributed by the dispersion | distribution table 20 is shown.

Next, the stable supply determination unit 96 calculates the index β based on the following formula (12) (step S22).
β = σ _t / X _t (12)
The index β is a large value when the transport mass of all the weighing hoppers 50 is small and the standard deviation with respect thereto is large. That is, the index β can be said to be an index indicating a variation state for each cycle of the weighing object conveyed to all the weighing hoppers 50.

  Next, the stable supply determination unit 96 generates determination data based on the height S and the index β. That is, the determination data includes the height S and the index β as determination results. The stable supply determination unit 96 is able to stably supply the articles to the weighing hopper 50 by the radiation feeder 30 based on the measurement values weighed by the respective weighing hoppers 50, that is, based on the distribution state of the weighing objects. It is determined for each radiation feeder 30 whether or not it exists.

  Next, the target supply amount changing unit 97 sets the target supply amount TW based on the measured value measured by each of the weighing hoppers 50 for each radiation feeder 30 determined to change the target supply amount TW by the change determination unit 95. To change.

Specifically, the target supply amount changing unit 97 calculates the maximum correction value R _Max based on the index β indicated in the determination data (step S23). Note that the maximum correction value R _Max, a correction value for obtaining the target supply amount TW _n that maximizes the reference target supply quantity TW _0. That is, when the maximum correction value R _Max is large, the difference in the set target supply amount TW _n for each weighing hopper 50 is large, and when the maximum correction value R _Max is the minimum value “0”, target supply amount TW _n of all of the weighing hoppers 50 become the same value.

In the first embodiment, when the index β satisfies β <0.2 and the variation in the transported mass is relatively small, the maximum correction value R _Max is obtained by the following equation (13),
R _Max = 0.45 (13)
When the index β satisfies 0.2 ≦ β ≦ 0.5, the maximum correction value R _Max is obtained by the following formula (14),
R _Max = 0.75-1.5 (σt / Xt) (14)
When the index β satisfies 0.5 <β and the variation in the transported mass is relatively large, the maximum correction value R _Max is obtained by the following equation (15).
R _Max = 0 (15)

In the combination weighing device 1, the case where the value of the index β is small means that when the weight of the weighing object to be conveyed is relatively stable for each cycle when attention is paid to a certain weighing hopper 50 (stable supply can be performed). ). In such a case, a target supply amount TW _n set for the weighing hopper 50, the error of the mass of the weighed which have been actually transported is reduced. On the other hand, when the value of the index β is large, a case where no possible stable supply, an error of the target supply amount TW _n set for the weighing hopper 50, the mass of the weighed which have been actually conveyed compare Become bigger.

In the combination weighing device 1, when the index β is small (when stable supply is possible), the maximum correction value R _Max is set to a relatively large value, and the difference in the target supply amount TW _n allocated to each weighing hopper 50 is determined. Enlarge. Thereby, in each cycle, intentional variation (slant amount control) can be given to the mass of the weighing object actually conveyed to the weighing hopper 50, and an efficient combination operation can be performed.

On the other hand, when the index β is large (when stable supply is not possible), the maximum correction value R _Max is set to be relatively small, and the difference in the target supply amount TW _n allocated to each weighing hopper 50 is reduced. This, when a large variation per cycle for conveyance by mass of the weighing hoppers 50 is occurring, it is not necessary to give further variation in the weight of the weighed to be conveyed by providing a difference in the target supply quantity TW _n Because. Thereby, in each cycle, the dispersion | variation between the measurement hoppers 50 can be suppressed to an appropriate state about the conveyance mass of each measurement hopper 50, and efficient combination operation | movement can be performed.

  Next, the target supply amount changing unit 97 sorts the weighing hoppers 50 in descending order based on the value of the height S and ranks them (step S24). As described above, the height S is an index indicating the distribution state of the weighing objects in the dispersion direction. Therefore, the ranking is arranged in a direction in which more weighing objects are dispersed compared to other dispersion directions. The weighing hopper 50 is ranked higher. Hereinafter, the order of the weighing hopper 50 at this time is assumed to be a rank m (1 ≦ m ≦ n).

Next, the target supply amount changing unit 97 calculates a correction value for the reference target supply amount TW ₀ for each of all the weighing hoppers 50 based on the maximum correction value R _Max (step S25). Note that the correction value of the weighing hopper 50 in the rank m (m = 1) is the maximum correction value R _Max . Target supply quantity changing unit 97, a correction value _{R m} of the weighing hoppers 50 of rank m, determined by the following equation (16).
R _m = (1 + R _Max ) −2 (m−1) R _Max / (n−1) (16)
Then, the target supply quantity changing unit 97 based on the correction value _{R m,} the target supply quantity TW _m of the weighing hoppers 50 of rank m, determined by the following equation (17).
TW _m = W × (1 + R _m ) (17)
In this way, the target supply quantity changing unit 97 calculates respective target supply amount TW _n allocated to each weighing hopper 50 (step S26).

Then, the target supply quantity changing unit 97 uses the target supply amount TW _n newly assigned, to correct the Okuchikara P of the radiation feeder 30 that conveys the weighed the n-th weighing hopper 50. For example, on the basis of the correction value E _n is calculated by the following equation (18), to correct the operating parameters (vibration time of the vibration intensity or the radiation feeders 30 of the radiation feeders 30, etc.) (step S16).
E _n = (W _n −X _n ) / W _t (18)

Here, change determination unit 95, thereby resetting the metering counter C (step S17), the feeder controller 92, by the target supply quantity TW _n is changed, based on the corrected operating parameters Parameter The n-th radiation feeder 30 is driven and controlled (step S18). Then, the series of processing returns to step S1 when the combination weighing is continued (S18: YES), and ends when the combination weighing is not continued (S18: NO).

(4) Effects As described above, in the combination weighing device 1 according to the first embodiment, the feeder control unit 92 is detected by the distance measuring sensor 32 in the above formula (1) stored in the storage unit 90. The radiation feeder 30 is controlled by the feed force P obtained from the height S based on the detected signal and the supply amount W as the target supply amount. The storage unit 90 stores the above formula (1) indicating the relationship among the article height S, the supply amount W of the radiation feeder 30 and the feeding force P of the radiation feeder 30. With such a configuration, the combination weighing device 1 can control the radiation feeder 30 with the optimum feeding force P for setting the target supply amount. Therefore, in the combination weighing device 1, articles can be supplied from the radiation feeder 30 to the weighing hopper 50 so as to achieve the target supply amount. As a result, the combination weighing device 1 can improve the weighing accuracy.

  FIG. 6 is a graph showing the relationship between height and supply amount. In FIG. 6, the horizontal axis indicates the height of the article on the radiation feeder 30, and the vertical axis indicates the supply amount of the article supplied to the weighing hopper 50. Each straight line L1 to L7 shown in FIG. 6 is a regression line (approximate straight line) as a result obtained when the radiation feeder 30 is operated for a predetermined time when the amplitude of the radiation feeder 30 is varied. .

  As shown in FIG. 6, in the combination weighing device 1 of the first embodiment, even when the amplitude is changed, the height S on the radiation feeder 30 and the supply of articles supplied to the weighing hopper 50 are provided. A relationship in which the quantity W is proportional is obtained. That is, the combination weighing device 1 detects the height S on the radiating feeder 30, determines the feeding force P according to the height S and controls the radiating feeder 30, thereby supplying the supply amount that becomes the target supply amount. W can be obtained. Therefore, in the combination weighing device 1, since a certain amount of articles can be supplied to each weighing hopper 50 in a balanced manner, for example, in a configuration in which 14 weighing hoppers 50 are provided, seven weighing hoppers 50 can be selected. It becomes. Thereby, the number of combinations of the weighing hoppers 50 can be maximized. As a result, the combination weighing device 1 can improve the weighing accuracy.

  In the first embodiment, the distance measuring sensor 32 detects the distance between the distance measuring sensor 32 and the article on the radiation feeder 30. The control unit 80 detects the height S of the article located in the vicinity of the discharge end of the radiation feeder 30 based on the distance. Thereby, the height S of the article immediately before being supplied to the weighing hopper 50, that is, the article to be supplied next to the weighing hopper 50 can be detected. Therefore, the feeding force P can be set more appropriately. As a result, articles can be stably supplied to the weighing hopper 50 with the target supply amount.

  In 1st Embodiment, the update part 94 which updates the said Formula (1) memorize | stored in the memory | storage part 90 during a driving | operation is provided. With this configuration, for example, the above equation (1) can be updated in accordance with a change in the state of supply of articles such as the distribution table 20, a change in conditions such as changes in the properties of articles, or a change in the shape of the radiation feeder 30. . Thereby, the feeding force P of the radiation feeder 30 can be controlled based on the updated formula (1). Therefore, even if there is a change in the transport status, such as changes in the supply state from the upstream, changes in product properties (large chips, small chips, etc.), flavor accumulation, temperature and humidity changes, etc., the weighing hopper 50 Thus, the articles can be stably supplied at the target supply amount.

  In the first embodiment, when the feeding force is P, the height is S, and the supply amount is W, the feeding force P is calculated based on the above formula (1). In the combination weighing device 1, the feeding force P of the radiation feeder 30 can be uniquely obtained by using the above formula (1).

  In the first embodiment, the radiating feeder 30 conveys an article by vibration. The feeding force P is an amplitude in the radiation feeder 30. In the radiation feeder 30 that conveys an article by vibration, the supply amount of the article can be controlled by changing the amplitude of the vibration. As a result, the supply amount can be controlled without depending on the driving ability.

  In the first embodiment, the feeder controller 92 controls the feeding force P of the radiation feeder 30 that operates continuously. In this configuration, since the feed force P of the radiation feeder 30 is controlled in a state where articles are continuously supplied to the weighing hopper 50, the weighing is continuously performed. Therefore, a decrease in measurement efficiency can be suppressed.

  In the first embodiment, depending on conditions such as the characteristics of the radiating feeder 30 and / or the distribution table 20 upstream of the radiating feeder 30, the state of conveyance may be different for each radiating feeder 30. In the combination weighing device 1 of the above-described embodiment, it is determined whether or not the target supply amount TW is changed for each radiation feeder 30 based on the measurement value measured by each weighing hopper 50, and the target supply is performed depending on the case. Since the amount TW can be changed, the radiation feeder 30 can be controlled with a more optimal feeding force P according to the actual condition of conveyance.

  More specifically, in the combination weighing device 1 of the above embodiment, during the operation of the combination weighing device 1, the stable supply determination unit 96 determines the distribution status of the articles dispersed by the distribution table 20, and the determination result is Accordingly, the target supply amount TW that is the mass of the article to be conveyed to each of the weighing hoppers 50 is calculated. Further, by controlling the conveying force of each radiation feeder 30 according to the new target supply amount TW calculated in this way, the mass of the article sound conveyed to each weighing hopper 50 and the weighing hopper 50 Since the error with respect to the target supply amount TW can be suppressed, an efficient weighing operation can be realized.

  In the first embodiment, the target supply amount TW of the weighing hopper 50 in the direction in which a relatively large amount of articles are dispersed is set to a relatively large value, and the target of the weighing hopper 50 in the direction in which only a relatively small amount of articles is dispersed. By setting the supply amount TW to a relatively small value, it is possible to improve the probability that the mass of the article actually conveyed to the weighing hopper 50 becomes the target supply amount TW.

  Furthermore, in the first embodiment, the target supply amount TW for each radiation feeder 30 changed by the target supply amount changing unit 97 is changed so as to have a slant amount relationship among the plurality of radiation feeders 30. When the articles supplied to the hopper 50 are combined, the feasibility of the combination is improved. Therefore, the measurement accuracy can be increased and the operating rate in the combination weighing device 1 can be increased.

(5) Second Embodiment Next, a second embodiment will be described. The combination weighing device 1 of the second embodiment includes an article height S, a supply amount W of the radiating feeder 30 and a feeding force P of the radiating feeder 30 stored in the storage unit 90 of the control unit 80. The relationship is different from the first embodiment.

The storage unit 90 stores the relationship among the article height S, the supply amount W of the radiating feeder 30, and the feeding force P of the radiating feeder 30. Specifically, for example, a table T shown in FIG. 9 is stored in the storage unit 90 as information. As shown in FIG. 9, the table T includes values of the supply amount W (W ₁ , W ₂ ,..., W _N ) and values of the article height S (S ₁ , S ₂ ,..., S _N ). And the value (P _N , P _N−1 ,..., P ₁ ) of the feeding force P are associated with each other. Supply amount W _has a relationship of _{W 1 <W 2 <... <} W N. Height S _has a relationship of _{S 1 <S 2 <... <} S N. Okuchikara P _have a relation of _{P 1 <P 2 <... <} P N.

In the table T shown in FIG. 9, for example, when the supply amount W is “W ₁ ”, “P ₄ ” of the feeding force P is selected when the height S of the article is “S ₃ ”. . In other words, if the height S of the article is “S ₃ ” and the feed force P is “P ₄ ”, the supply amount W is “W ₁ ”.

  The feed force P stored in the storage unit 90 is calculated by the above equation (1). A table T for storing the feeding force P calculated using the initial values of coefficients A and B is stored in the storage unit 90 as an initial table T. Each information in the table T can be updated (rewritten).

The feeder control unit 92 controls the feeding force P of the radiation feeder 30. The feeder control unit 92 radiates with the feed force P obtained from the height S of the article based on the distance detected by the distance measuring sensor 32 and the supply amount W as the set target supply amount in the table T. The feeder 30 is controlled. The feeder control unit 92 refers to the table T based on the calculated article height S and the supply amount W that is the target supply amount, and extracts the feeding force P. Specifically, for example, when the supply amount W that is the target supply amount is “W ₁ ” and the calculated height S is “S ₃ ”, the feeder control unit 92 uses the table T as the feeding force P. “P ₄ ” is extracted. The feeder control unit 92 controls the operation of the radiation feeder 30 by the feeding force P extracted from the table T.

  The update unit 94 updates the table T stored in the storage unit 90 during operation. The update unit 94 updates the table T by calculating the feed force P by changing the coefficients A and B in the above equation (1). The update unit 94 calculates the coefficients A and B based on the above equations (2) and (3). The update unit 94 calculates the feed force P using the calculated coefficients A and B in the equation (1), and updates the table T with the feed force P.

  As described above, in the combination weighing device 1 according to the second embodiment, the feeder control unit 92 has a height based on the detection signal detected by the distance measuring sensor 32 in the table T stored in the storage unit 90. The radiation feeder 30 is controlled by the feed force P obtained from S and the supply amount W that is the target supply amount. The storage unit 90 stores the table T indicating the relationship among the article height S, the supply amount W of the radiation feeder 30, and the feeding force P of the radiation feeder 30. With such a configuration, the combination weighing device 1 can control the radiation feeder 30 with the optimum feeding force P for setting the target supply amount. Therefore, in the combination weighing device 1, articles can be supplied from the radiation feeder 30 to the weighing hopper 50 so as to achieve the target supply amount. As a result, the combination weighing device 1 can improve the weighing accuracy.

(6) Modifications While the first and second embodiments have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention.

  The combination weighing device 1 of the above embodiment includes a stable supply determining unit 96 that determines for each radiating feeder 30 whether or not the radiating feeder 30 can stably supply articles to the weighing hopper 50, and this stable supply determining unit 96. The target supply amount changing unit 97 has been described based on an example in which the target supply amount changing unit 97 calculates a new target supply amount TW based on the degree of stable supply determined by the above, but the present invention is not limited to this.

  For example, the change determination unit 95 calculates a standard deviation (measured value) and / or an average transported mass (measured value) of the transported mass when a predetermined number of weighing operations are performed, and these values are values within a predetermined range. In this case, it may be determined that the target supply amount TW is the radiating feeder 30 to be changed, and the target supply amount TW may be changed by focusing on these radiating feeders 30. Then, the target supply amount changing unit 97 may set a new target supply amount TW for these target radiation feeders 30 so as to have a slant amount relationship among the plurality of radiation feeders 30. .

  With such a configuration, the radiation feeder 30 that is difficult to be stably supplied can be removed from the combination target in the combination weighing, so that the measurement accuracy can be improved. Further, based on the standard deviation (measured value) and / or the average transported mass (measured value) of the transported mass when the weighing operation is performed a predetermined number of times, the abnormality of the radiation feeder 30 is determined, and this is indicated to the operator. It can also be set as the structure which alert | reports.

  Further, for example, the change determination unit 95 calculates an average transported mass (measured value) of the transported mass when a predetermined number of weighing operations are performed, and the target supply amount changing unit 97 is common to all the radiation feeders 30. With respect to the set target supply amount TW, a new target supply amount TW may be set for each radiation feeder 30 based on the calculated average transported mass. That is, the target supply amount changing unit 97 may change the target supply amount TW for each radiation feeder 30 based on the calculated average transport mass.

  In the above embodiment, the distance measuring sensor 32 is described as an example of the detecting unit, but the detecting unit is not limited to the distance measuring sensor 32. The detection unit may be a camera or the like, for example.

  In the above-described embodiment, an example in which one distance measuring sensor 32 is provided corresponding to each radiation feeder 30 has been described as an example. However, a plurality of distance measuring sensors 32 are provided along the conveyance direction of the radiation feeder 30. It may be done. Thereby, the height S of the articles | goods of several places is detectable. Therefore, the radiation feeder 30 can be controlled based on the overall state of the article conveyed by the radiation feeder 30.

  In the embodiment described above, an example in which one distance measuring sensor 32 is provided corresponding to each radiation feeder 30 has been described as an example. However, the distance measuring sensor 32 is provided corresponding to each radiation feeder 30. It does not have to be. For example, the distance measuring sensor 32 may be provided, for example, two by two with respect to the radiation feeders 30 that are arranged radially. The supply amount of articles supplied from the dispersion table 20 may not differ significantly between adjacent radiation feeders 30. Therefore, the result detected by one distance measuring sensor 32 is used as the distance to the article in the radiation feeder 30 arranged on both sides of the radiation feeder 30 detected by the distance measuring sensor 32. In this case, since the number of distance measuring sensors (detecting units) can be reduced, the cost can be reduced.

  In the above-described embodiment, the form in which the feeding force P of the radiating feeder 30 has an amplitude has been described as an example. However, the feeding force P may be the vibration time of the radiating feeder 30. Alternatively, the feeding force P may be both amplitude and vibration time.

In the above-described embodiment, an example in which the feeder control unit 92 calculates the height S of the article based on the detection signal detected by the distance measuring sensor 32 and calculates the feeding force P using the calculated height S will be described as an example. However, the form which calculates | requires the power feeding P, without calculating the height S may be sufficient. In the case of this configuration, the following formula (21) is used to calculate the feeding force P.
P = A1 * W / (L-Sp) + B1 (21)

  In the formula (21), each of “A1” and “B1” is a coefficient. “L” is the distance from the bottom surface 30 a of the radiation feeder 30 to the distance measuring sensor 32. “Sp” is a detection value (a distance between the distance measurement sensor 32 and the article) indicated by the detection signal of the distance measurement sensor 32. When the feeder control unit 92 receives the detection signal transmitted from the distance measuring sensor 32, the feeder control unit 92 substitutes the detection value Sp indicated by the detection signal and the supply amount W that is the target supply amount into the above equation (21), thereby P is calculated.

  In addition to the above embodiment, the storage unit 90 may store the supply amount W, the coefficient A, and the coefficient B in association with the shape of the conveyance path of the article and / or the radiation feeder 30. Thereby, control according to the shape of the conveyance path of the article and / or the radiation feeder 30 can be performed. Therefore, it is possible to save the operator from changing the setting of the coefficient and the like for each shape of the conveyance path of the article and / or the radiation feeder 30.

  In the above-described embodiment, the radiation feeder 30 is described as an example of the transport unit. However, the transport unit may be configured to transport articles by a coil unit (screw) that can be rotationally driven or a belt conveyor, for example. In the case of a coil unit, the feeder control unit 92 controls the number of rotations (rpm) of the coil unit and the like as a feeding force. In the case of a belt conveyor, the feeder controller 92 controls the number of rotations of a roller for driving the belt.

  In the above embodiment, the combination weighing device 1 includes the dispersion table 20, and the circular arrangement form in which the radiation feeder 300 is arranged radially around the dispersion table 20 has been described as an example. However, the combination weighing device may be in the form of a linear arrangement in which each of the conveyance unit and the weighing unit is arranged linearly.

  DESCRIPTION OF SYMBOLS 1 ... Combination measuring device, 10 ... Article supply chute, 20 ... Dispersion table, 30 ... Radiation feeder (conveyance part), 32 ... Ranging sensor (detection part), 34 ... Support frame, 40 ... Pool hopper, 50 ... Weighing hopper 56 ... Load cell (measuring unit), 60 ... Collecting discharge chute unit, 70 ... Timing hopper, 80 ... Control unit, 90 ... Storage unit, 92 ... Feeder control unit, 94 ... Update unit, 95 ... Change determination unit, 96 ... Stable supply determination unit, 97 ... target supply amount changing unit.

Claims (10)

A dispersion unit for dispersing the articles;
A plurality of conveyance units for conveying articles supplied from the dispersion unit;
A weighing unit that is arranged corresponding to each of the plurality of conveying units, and that weighs the articles supplied from the conveying units,
A combination weighing device that controls the operation of each conveying unit so that the articles supplied to each weighing unit have a target supply amount,
A detection unit for detecting the height of the article on the conveyance unit;
A storage unit that stores a relational expression derived from the height of the article, the supply amount of the transfer unit, and the feeding force of the transfer unit;
Wherein the height is detected in front Symbol detection unit, said calculating a Okuchikara from the equation by using the target supply amount, using the Okuchikara that the calculated, control unit for controlling the transport unit,
A combination weighing device comprising: a change determination unit that determines whether or not to change the target supply amount for each of the conveyance units based on a measurement value measured by each of the measurement units.   A target supply amount changing unit configured to change the target supply amount based on a measurement value measured by each of the measurement units, for each of the conveyance units determined to change the target supply amount by the change determination unit; The combination weighing device according to claim 1.   The combination weighing device according to claim 2, wherein the target supply amount changing unit changes the target supply amount for each of the transport units so that a slant amount relationship exists between the plurality of transport units. Based on a value relating to the distribution status obtained from the measurement values measured by the respective weighing units, it is determined for each of the conveyance units whether or not the conveyance unit is able to stably supply the article to the measurement unit. The combination weighing device according to any one of claims 1 to 3, further comprising a stable supply determination unit.   The combination weighing device according to claim 1, wherein the detection unit detects the height of the article located in the vicinity of a discharge end of the transport unit. The combination according to any one of claims 1 to 5, wherein the feeding force P is calculated based on the following formula (1), where P is the feeding force, S is the height, and W is the supply amount. Weighing device.
P = A × W / S + B (1)
However, A and B are coefficients.   The said storage part WHEREIN: The said supply amount W, the said coefficient A, and the said coefficient B are memorize | stored corresponding to the shape of the articles | goods supplied and / or the conveyance path of the said conveyance part. Combination weighing device.   The combination weighing device according to claim 1, further comprising an updating unit that updates the relationship stored in the storage unit during operation. The transport unit transports the article by vibration,
The combination weighing device according to claim 1, wherein the feeding force is an amplitude in the transport unit.   The combination weighing device according to claim 1, wherein a plurality of the detection units are provided along a conveyance direction of the conveyance unit.

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