WO2007069544A1 - 組合せ秤及びそれを用いた計量装置 - Google Patents
組合せ秤及びそれを用いた計量装置 Download PDFInfo
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- WO2007069544A1 WO2007069544A1 PCT/JP2006/324549 JP2006324549W WO2007069544A1 WO 2007069544 A1 WO2007069544 A1 WO 2007069544A1 JP 2006324549 W JP2006324549 W JP 2006324549W WO 2007069544 A1 WO2007069544 A1 WO 2007069544A1
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- combination
- hopper
- weighing
- discharge
- weighed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/387—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for combinatorial weighing, i.e. selecting a combination of articles whose total weight or number is closest to a desired value
- G01G19/393—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for combinatorial weighing, i.e. selecting a combination of articles whose total weight or number is closest to a desired value using two or more weighing units
Definitions
- the present invention relates to a combination weigher and a weighing device for feeding a weighed object to a packaging machine or the like.
- FIG. 13 shows the schematic configuration of the first conventional combination weigher for weighing such objects.
- a conical dispersion feeder 1 that disperses objects to be weighed supplied from an external supply device in a radiating manner by vibration is provided on an upper portion of a center base (body) 11 disposed in the center of the device. Is provided.
- a linear feeder 2 is provided for feeding an object to be weighed sent from the dispersion feeder 1 to each supply hopper 3 by vibration.
- a plurality of supply hoppers 3 and weighing hoppers 4 are provided correspondingly and arranged in a circular shape.
- the supply hopper 3 receives the object to be weighed sent from the linear feeder 2, and when the weighing hopper 4 disposed below it becomes empty, the gate is opened and the object to be weighed is put into the weighing hopper 4.
- a weight sensor 41 such as a load cell is attached to the weighing hopper 4, and the weight sensor 41 measures the weight of an object to be weighed in the weighing hopper 4.
- Combinations by the control unit 30 A combination of hot hoppers to be discharged is determined by calculation, and the objects to be weighed are discharged onto the collecting chute 12 from the weighing hopper 4 corresponding to the combination.
- the collecting chute 12 is provided below the weighing hopper 4.
- the packaging machine for example, while producing a bag, the bag is filled with the objects to be weighed discharged from the combination weigher.
- a collection hopper 13 for the collection chute 12 is provided so that the objects to be weighed can be discharged in one lump, and the discharge cycle It is necessary to shorten the time.
- the discharge cycle time can be reduced to 1Z2 with respect to the single shift.
- the total number of weighing hoppers 4 is set to 10
- the number of weighing hoppers 4 selected for combination is set to 4
- one combination calculation is performed within one weighing cycle time.
- the discharge operation by the weighing hopper 4 is performed once, and the collect hopper 13 force is also discharged once by the packaging machine.
- the number of weighing hoppers 4 is increased to 4 so that the total number is 14, and the combination is selected.
- the number of weighing hosno 4 should be four.
- a combination calculation is performed every 1Z2 of one weighing cycle time, and the objects to be weighed are discharged from the weighing hopper 4 of the combination selected in the combination calculation. Ensure that the objects to be weighed are discharged. Therefore, the combination calculation is performed twice within one weighing cycle time, the discharging operation by the weighing hopper 4 is performed twice, and the discharging operation from the collecting hopper 13 to the packaging machine is performed twice. Production volume (total number of discharges from the combination weigher to the packaging machine) can be improved, making it possible to support high-speed packaging machines.
- the combination weigher shown in FIG. 13 is configured to perform a double shift operation, the length of the object to be weighed discharged from the weighing hopper 4 and sliding down on the collecting chute 12 is shortened. There is no. Therefore, the interval between the weighing object discharged from the weighing hopper 4 selected as the previous combination on the collecting chute 12 and the weighing object discharged from the weighing hopper 4 selected as the next combination is sufficiently large. In some cases, it becomes difficult to perform double shift operation at a predetermined operation speed. To solve this problem, the configuration shown in Fig. 14 with two collective shunts can be considered.
- FIG. 14 (a) is a schematic diagram of a partial cross-section of the combination weigher of the second conventional example viewed from the side force
- Fig. 14 (b) is an assembly chute (inner side) of the combination weigher.
- FIG. 2 is a schematic view of a chute and an outer chute) and a weighing hopper viewed from above.
- This combination weigher is described in Patent Document 1. In this configuration, a lower chute is arranged so that an object to be weighed is sent out to a packaging machine having a single inlet.
- each weighing hopper 4 is selectively covered to the inner chutes 6 and outer chutes 7 below it.
- two gates (not shown) are provided so that the sample can be discharged.
- a collecting hopper 8 is provided at the lower discharge port 6e of the inner chute 6 to temporarily hold and discharge the object to be measured, and the lower discharge port 7e of the outer chute 7 temporarily holds and discharges the object to be measured.
- a collecting hopper 9 is provided.
- a lower chute 10 is provided below the two collecting hoppers 8 and 9 for feeding the objects to be weighed discharged from the collecting hoppers 8 and 9 into one input port of the packaging machine. It is a configuration.
- the control unit 31 controls the operation of the entire combination weigher and performs combination calculation.
- This combination weigher is configured to perform a double shift operation, and discharges the objects to be weighed alternately from the weighing hoppers 4 selected for the combination to the inner chute 6 and the outer chute 7, and the collective hopper 8 and collective hopper 9
- the force is also configured to alternately discharge the object to be measured to the lower chute 10.
- the object to be weighed is discharged twice from the outlet 10e of the lower chute 10 within one weighing cycle time, and the production amount can be improved within a predetermined time, and the inner chute 6 and Each chute of the outer chute 7 is simply discharged from the weighing hopper 4 times, and the distance between the first weighed object and the weighed object from which the rear force is also discharged on each chute is set. It can be secured.
- the lower chute 10 when the lower chute 10 is not provided, two packaging machines or twin type packaging machines having two input ports for objects to be weighed are arranged below the combination weighers.
- the objects to be weighed discharged from the collecting hoppers 8 and 9 are fed into the inlets of the respective packaging machines.
- the object to be weighed is discharged once to each of the two input ports of the packaging machine within one weighing cycle time by the double shift operation. That is, the discharge of the object to be weighed twice in total within one weighing cycle time is the same regardless of the presence or absence of the lower chute 10, and the production volume can be improved within the predetermined time.
- Patent Document 1 JP-A-57-125322
- Patent Document 2 Japanese Patent Publication No. 8-1395 Disclosure of the invention
- the object to be weighed discharged from the weighing hopper 4 on the side close to the collecting hopper 8 of the inner chute 6 to the outer chute 7 bypasses the outer periphery of the inner chute 6. Since the outer chute 7 is disposed so as to be transferred to the collecting hopper 9, the structure of the collecting chute including the outer chute and the inner chute is complicated.
- the collecting hoppers 8 and 9 provided on the inner and outer chutes 6 and 7 are arranged out of the central force of the circle that is the arrangement shape of the weighing horns 4, Depending on the position of each weighing hopper 4 with respect to the hoppers 8 and 9, the transfer distance of the objects to be weighed from each weighing hopper 4 to the collecting hopper 8 and the inclination of the chute 6 are greatly different. The transfer distance of the object to be weighed and the inclination of the chute 7 are greatly different. Therefore, the arrival times of the objects to be weighed that reach the collecting hoppers 8 and 9 after being transported on the chutes in each of the chutes 6 and 7 increase.
- the object to be weighed near the collecting hopper 8 of the inner chute 6 and discharged from the side weighing hopper 4 to the outer chute 7 bypasses the outer periphery of the inner chute 6 and is transferred to the collecting hopper 9. Therefore, the weighing object discharged from the weighing hopper 4 on the side close to the collecting hopper 9 is remarkably later than the time when the weighing object reaches the collecting hopper 9, and the time of arrival of the weighing object reaching the collecting hopper 9 is reduced.
- the variation becomes larger.
- the variation in the time at which the objects to be weighed discharged from the plurality of weighing hoppers 4 to the inner chute 6 or the outer chute 7 at the same time reach the collecting hoppers 8 and 9 becomes large.
- the present invention has been made to solve the above-described problems, and the structure of the collective chute is relatively simple, enabling high-speed operation regardless of the properties of most objects to be weighed.
- the combination weigher of the present invention is arranged in a circular arc shape with a central angle of approximately 180 degrees or less, and the objects to be weighed are arranged on the inner side in the central direction of the circular arc.
- a combination hopper row comprising a plurality of combination hoppers that selectively discharge in the direction opposite to the outer direction, and an arrangement shape of the combination hopper row disposed below the combination hopper row.
- the upper edge is arcuate in correspondence with the inner shunt for collecting the objects to be weighed inward from the combination hopper and discharging the lower discharge loci, and along the outer side of the inner chute.
- An outer chute that collects the objects to be weighed discharged outward from the combination hot bar and discharges the lower discharge loci, and is provided at the discharge port of the inner chute.
- Weighing objects A first collective hopper that temporarily holds and discharges; a second collective hopper that is provided at the discharge port of the outer chute and temporarily holds and discharges the objects to be weighed discharged from the discharge port; Combined calculation for obtaining the first discharge combination and the second discharge combination, which also has the combination force of the combination hot bar, so that the combined weight value that is the total weight of the objects to be weighed becomes a value within the allowable range with respect to the target weight value. And the weighing object to the combination hopper belonging to the first discharge combination and the weighing object to the combination hopper belonging to the second discharge combination.
- Discharging the objects to the outside allowing the objects to be weighed to be discharged to the first collecting hopper holding the objects to be weighed discharged from the combination hopper belonging to the first discharge combination, and the second of Control means for discharging the objects to be weighed to the second collective hopper holding the objects to be weighed discharged from the combination hopper belonging to the discharge combination.
- the inner chute is disposed corresponding to the arc-shaped combination hopper row having a central angle of approximately 180 degrees or less, and the outer chute is disposed along the outer side.
- the structure of the collecting chutes can be made relatively simple, and the transfer distance of the objects to be weighed discharged from the respective combination hoppers to the inner chutes or outer chutes can be reduced to approximately the same. Regardless of the properties of most of the objects to be weighed, all the objects to be weighed discharged from the combination hopper can be collected in each collecting hopper in a short time. Therefore, the structure of the collective chute can be made relatively simple, and high-speed operation can be performed regardless of the properties of most objects to be weighed.
- the combination calculation means performs a combination calculation based on the weight of the objects to be weighed supplied to the combination hot bar, so that the combination weight value is within an allowable range for the target weight value.
- the combination process of finding one combination of hotspots for the combination and determining the appropriate amount combination is repeated ⁇ ⁇ ⁇ ⁇ , and the combination process is repeated n times (n is multiple) when the combination process is repeated.
- the combination process to be performed later belongs to an appropriate amount combination determined by the previous combination process, and is based on the weight of the object to be weighed supplied to the combination hopper. Therefore, the combination calculation is performed, and the appropriate amount combination sequentially obtained by the repeated combination processing is alternately determined as the first discharge combination and the second discharge combination.
- the control means includes the combination hopper belonging to the first discharge combination and the first discharge combination. So that the objects to be weighed are alternately discharged to the combination hoppers belonging to the two discharge combinations, and the objects to be weighed are alternately discharged to the first collecting hob and the second collecting hob. The weighing object discharged from the first collective hobba and the measured object discharged from the second collective hobah are loaded into the same packaging machine input port.
- the combination processing is performed n times, and the object to be weighed can be discharged n times to the same packaging machine inlet. It is possible to improve the production amount (combined weighing force total number of discharges to the packaging machine) within a predetermined time.
- the inner chute and the outer chute are each discharged during one operation cycle time.
- the weighing object is only discharged nZ2 times from the combination hopper, and even if high speed operation is performed, the distance between the weighing object discharged first and the weighing object discharged later can be secured on each chute.
- the combination calculation means performs a combination calculation based on the weight of the objects to be weighed supplied to the combination hot bar, so that the combination weight value is compared with the target weight value. Repeat the combination process to find one combination of hot-spots with a value within the permissible range and determine the appropriate combination, and n times (where n is multiple) when the combination process is repeated.
- the combination process to be performed later belongs to an appropriate amount combination determined by the previous combination process, and is supplied to the combination hopper. Based on the weight, the combination calculation is performed, and the appropriate amount combination obtained sequentially by the repeated combination process is alternately determined as the first discharge combination and the second discharge combination.
- the control means is configured to detect the combination hoses belonging to the first discharge combination in response to the first discharge combination and the second discharge combination being alternately determined by the combination calculation means.
- the weighing object is alternately discharged to the combination hopper belonging to the second discharging combination, and the weighing object is alternately discharged to the first collecting hob and the second collecting hob.
- the weighing object discharged from the first collecting hobba and the weighing object discharged from the second collecting hot bar are respectively input to different packaging machine inlets. Have you been?
- the combination processing is performed n times, and the objects to be weighed are discharged nZ2 times to the two respective packaging machine inlets. Since it is discharged, it can be discharged a total of n times, and the production volume can be improved within a predetermined time. Also, for each discharge combination determined in sequence, the measured item in the combination hopper is alternately discharged to the inner chute and the outer chute, so that each of the inner chute and the outer chute is in one operation cycle time.
- the weight of the object to be weighed is only discharged twice from the combination hopper, and the distance between the object to be weighed first on each chute and the object to be weighed later on each chute even if high speed operation is performed. It can be secured.
- the combination calculation means performs the combination calculation on the basis of the weight of the objects to be weighed supplied to the combination hot bar, and the combinations described above are obtained by the combination calculation. If the weight value is within the allowable range with respect to the target weight value and the same combination hot bar is not included in each, two combinations of the combination hot bars are obtained. One of these two combinations is determined to be the first discharge combination, and at the same time, the other is determined to be the second discharge combination, and the control means is configured to perform the combination calculation means.
- the objects to be weighed are discharged from the first collective hob and the objects to be weighed discharged from the first collective hob so that the objects to be weighed are discharged simultaneously to the second collective hopper.
- one operation cycle time (for example, one metering cycle time) that is a time required for determining two discharge combinations and determining the next two discharge combinations is determined.
- the objects to be weighed can be discharged once from each of the first and second collecting hotspots, and the production volume can be improved within a predetermined time.
- the objects to be weighed in the combination hopper belonging to one of the two discharge combinations determined at the same time are discharged to the inner chute and the objects to be weighed in the combination hopper belonging to the other discharge combination. Since the object is discharged to the outer chute, the object to be weighed is only discharged once from the combination hopper to each of the inner chute and the outer chute during one operation cycle time.
- the weights of the objects to be weighed in all the combination hot bars are used in the combination calculation when obtaining the two sets of discharge combinations. This makes it possible to improve the combined weighing accuracy of the discharged objects to be weighed as a whole.
- the combination hopper rows are arranged in two upper and lower rows, and the combination hopper in the upper combination hopper row is a weighing hopper that weighs the weight of the object to be supplied.
- the combination hoppers in the combination hopper row are memory hoppers that are provided in correspondence with the weighing hoppers and are supplied with objects to be weighed by the weighing hoppers, and the weighing hoppers correspond to the corresponding memory hoppers and the memory hoppers.
- the weighing hopper can be selectively discharged to the outer chute, and the memory hopper has the inner chute and the outer chute.
- the combination calculating means includes the memory hopper corresponding to the weighing hopper when the first discharge combination includes the weighing hopper. It may be configured to determine the first emission combination.
- the combination hopper is provided with the weighing hopper and the memory hopper arranged as upper and lower as the combination hopper, so that the combination calculation without increasing the diameter of the arc that is an array of the combination hoppers. It is possible to increase the accuracy of combination weighing by increasing the number of weight values used for the measurement.
- Each of the weighing devices according to the present invention includes a plurality of weighing units each having a combination weighing force according to claim 1, wherein the combination hopper rows of all the weighing units are continuously arranged. All the combination hotspots are arranged in a circular shape.
- the objects to be weighed that are arranged in a circle and are supplied to each other are selectively discharged into an inner direction that is the center direction of the circles that are arranged in a row and an outer direction that is the opposite direction.
- the combination hopper group consisting of a plurality of combination hoppers is divided into P pieces (P is a plurality) of arc-shaped hopper rows, corresponding to each of the combination hopper rows.
- P second collective hoppers are provided.
- Each weighing unit is configured by adding combination calculation means and control means to the corresponding combination hopper row, inner chute, outer chute, first collective hopper, and second collective hopper. Is done.
- the combination calculation means of each weighing unit may be combined into a single combination calculation means.
- the control means of each weighing unit may be configured as one control means.
- the weighing device of the present invention has a configuration in which a plurality of the above-described combination weighers (weighing units) of the present invention are provided, the same effects as the combination weigher of the present invention can be obtained in each weighing unit. It is done.
- the yarn alignment operation means in each of the weighing units is based on the weight of the objects to be weighed supplied to the combination hob in the weighing unit! Once the combination calculation is performed, the combination weight value falls within the allowable range for the target weight value.
- the combination process of finding one combination of the combination hotspots and determining the combination to be an appropriate amount is repeated, and when the combination process is repeated, the combination process is repeated n times (n is a plurality).
- the combination process to be performed later belongs to an appropriate amount combination determined by the previous combination process, and is combined based on the weight of the objects to be weighed supplied to the combination hot bar.
- Each of the weighing units is configured to alternately calculate the appropriate combination obtained sequentially by the combination process that is repeatedly performed, as the first discharge combination and the second discharge combination.
- the control means is configured to detect the first discharge set in response to the first discharge combination and the second discharge combination being alternately determined by the combination calculation means in the weighing unit. And alternately discharging the objects to be weighed to the combination hopper belonging to the second discharge combination and the combination hopper belonging to the second discharge combination, and to the first collective hopper and the The objects to be weighed are alternately discharged to the second collecting hopper and the objects to be discharged from the first collecting hopper and the second collecting hopper of the same weighing unit. It is configured so as to be fed into the same packaging machine inlet, and the objects to be weighed discharged from the first collecting hopper and the second collecting hopper of different weighing units are fed into different packaging machine inlets, respectively. Constructed to do.
- n combination processes are performed during one operation cycle time (for example, one weighing cycle time), and the same packaging machine inlet is covered. Weighed materials can be discharged n times, and the production volume (the total number of discharges to the packaging machine) can be improved within a predetermined time.
- the objects to be weighed in the combination hopper are alternately discharged to the inner chute and the outer chute for each discharge combination that is sequentially determined, each of the inner chute and the outer chute during one operation cycle time.
- the object to be weighed is only discharged nZ2 times from the combination hotspot, and the distance between the object weighed first and the object weighed later on each chute is secured even when high-speed operation is performed. it can.
- the total number of the weighing units is an even number
- the combination calculation means performs a combination calculation based on the weight of the objects to be weighed supplied to the combination hot bar in the weighing unit, and each combination weight value obtained by the combination calculation is Two combinations of the combination hot bars that are within the allowable range for the target weight value and do not include the same combination hot bar are obtained, and one of these two combinations is determined as the first combination.
- a combination process is performed to simultaneously determine the other discharge combination as the second discharge combination, and the control means in each of the weighing units is controlled by the yarn and combination calculation means in the weighing unit.
- the yarn that is configured to perform an internal discharge process for discharging and an external discharge process for discharging the objects to be weighed simultaneously to the first collective hopper and the second collective hopper, and arranged adjacently
- Each of the weighing units constituting the pair unit is determined in advance for each pair of weighing units including a pair of hopper rows, and a pair of packaging machine inlets corresponding to the pair unit.
- the objects to be weighed discharged from any one of the first collecting hopper and the second collecting hopper are fed into one of the pair of packaging machine inlets, and the other
- the weighing object discharged from the assembly hot bar is put into the other packaging machine input port, and the combination unit, the internal discharge process, and the
- the series of processes consisting of the partial discharge process is repeated, the series of processes is performed between the two weighing units that constitute the pair unit.
- the operation cycle time until the external discharge process is started is configured to be shifted by approximately 1Z2 time.
- each weighing unit the objects to be weighed are discharged from the first and second collective hot bars once each during one operation cycle time (for example, one weighing cycle time). It is possible to improve the production amount within a predetermined time.
- each of the two packaging machine inlets corresponding to the two weighing units of the pair unit can load the object to be measured twice during one operation cycle time, the packaging operates at high speed. Can correspond to the machine.
- it is determined at the same time. The weighing object in the combination hopper belonging to one of the two discharge combinations is discharged to the inner chute, and the weighing object in the combination hopper belonging to the other discharge combination is discharged to the outer chute.
- the object to be weighed is only discharged from the combination hopper once for each of the inner shout and the outer chute, and is discharged first on each chute even at high speed operation. It is possible to secure a distance between the measured object and the object discharged later.
- the combination calculation when obtaining the two sets of discharge combinations all of the combination objects in the combination hobbies in each weighing unit It is possible to use the weight, and it is possible to improve the combined weighing accuracy as a whole of the objects to be discharged.
- the yarn alignment operation means in each of the weighing units is based on the weight of the object to be weighed supplied to the combination hob in the weighing unit!
- the combination weight value becomes a value within the allowable range with respect to the target weight value. All combinations of the combination hobbers are obtained, and each combination is determined as an appropriate combination.
- a first process for obtaining an appropriate amount combination set that is combined and does not include the same combination hot bar in the appropriate amount combination to be combined; and for each appropriate amount combination set, the appropriate amount combination set is included in the appropriate amount combination set Calculate the sum of the absolute values of the difference between the combination weight value of each appropriate amount combination and the target weight value, and select one appropriate amount combination set having the minimum absolute value of the difference.
- one of the two proper amount combinations included in the proper amount combination set is determined as the first discharge combination and the other is set as the second discharge combination. Is configured to perform a second processing to be constant, even if,.
- the yarn alignment operation means in each of the weighing units is based on the weight of the objects to be weighed supplied to the combination hob in the weighing unit!
- the combination weight value becomes a value within the allowable range with respect to the target weight value.
- m (m is a plurality) of the allowable combinations are selected with priority given to the absolute value of the difference between each of the combination weight values and the target weight value is small.
- a first appropriate amount combination and for each of the first appropriate amount combinations, from among the allowable combinations that are the combination force of the combination hobber excluding the combination hopper belonging to the first appropriate amount combination,
- the first allowable combination is selected by giving priority to one of the allowable combinations, and the first appropriate combination and the corresponding first combination are selected.
- a first process for obtaining m appropriate combination sets consisting of two appropriate combinations, and for each of the appropriate combination sets, the combination weight value and the target weight value of each of the first and second appropriate combination Calculate the sum of absolute differences
- One appropriate combination set having a minimum sum of absolute values of the differences is selected, and one of the first and second appropriate combination included in the selected appropriate combination set is selected as the first discharge. It is also possible to perform a second process for determining a combination and determining the other as the second discharge combination.
- the yarn alignment operation means in each of the weighing units is based on the weight of an object to be weighed supplied to the combination hob in the weighing unit!
- the combination weight value becomes a value within an allowable range with respect to the target weight value. All combinations of the combination hobbers are obtained and each is set as an allowable combination. From all the allowable combinations, One having the smallest absolute value of the difference between the combination weight value and the target weight value is selected as the first appropriate amount combination, and the combination hopper belonging to the first appropriate amount combination is excluded.
- a second appropriate amount is selected by preferentially selecting one of the allowable combinations, which is a combination of the combination hotspots, with a smaller absolute value of the difference between the combination weight value and the target weight value.
- a combination may be configured such that one of the first and second appropriate amount combinations is determined as the first discharge combination and the other is determined as the second discharge combination.
- the combination calculation means in each of the weighing units is based on the weight of the object to be weighed supplied to the combination hot bar in the weighing unit!
- the combination calculation is performed, and the respective combination weight values obtained by the combination calculation are within the allowable range with respect to the target weight value, and each does not include the same combination hopper.
- Two combinations of hotsuba are obtained, and one of these two combinations is determined as the first discharge combination, and at the same time, a combination process is performed in which the other is determined as the second discharge combination.
- the control means in the weighing unit includes the combination hopper belonging to the first discharge combination and the combination hopper belonging to the second discharge combination obtained by the combination calculation means in the measurement unit.
- the objects to be weighed simultaneously discharged from the collecting hoppers of the first collecting hopper and the second collecting hopper of the weighing unit are respectively loaded into different packaging machine inlets. Yo ...
- the objects to be weighed can be discharged once from each of the first and second collective hot bars of all the weighing units,
- the production amount can be improved within a predetermined time. For example, if there are k weighing units (k is multiple), 2 X k packaging machines can be loaded at the same time during one operation cycle time. It can correspond to a packaging machine that wraps k sets of objects to be weighed at the same time. Also, in each weighing unit, the objects to be weighed in the combination hopper belonging to one of the two discharge combinations determined simultaneously are discharged to the inner chute, and the combination hopper belonging to the other discharge combination.
- the weighing object Since the objects to be weighed in the storage are discharged to the outer chute, the weighing object is only discharged from the combination hopper once for each of the inner chute and the outer chute during one operation cycle time. Even if the measurement is performed, it is possible to secure the interval between the object to be weighed first on each chute and the object to be weighed later. Also within 1 operation cycle time Since two sets of discharge combinations to be discharged at the same time are determined at the same time, it becomes possible to use the weights of the objects to be weighed in all the combination hobbies in each weighing unit in the combination calculation when obtaining the two sets of discharge combinations. It becomes possible to improve the combined weighing accuracy of the discharged objects to be weighed as a whole.
- the combination hopper rows of all the weighing units are arranged in two upper and lower rows, and the upper hopper row of the combination hopper row is a weighing hopper that weighs the object to be weighed.
- Each of the combination hoppers in the lower combination hopper row is a memory hopper provided corresponding to the weighing hopper and supplied with an object to be weighed by the weighing hopper.
- the hopper has a configuration capable of selectively discharging the object to be measured to the corresponding memory hopper and the outer chute, and the memory hopper can selectively discharge the object to be measured to the inner chute and the outer chute.
- the combination calculation means in each of the weighing units always has the memory corresponding to the weighing hopper.
- the Tsu path configured to determine a including the first discharge combination, even.
- the combination hoppers can be combined without increasing the diameter of the circle that is the arrangement shape of the combination hoppers. It is possible to improve the combination weighing accuracy by increasing the number of weight values used in the calculation.
- the present invention has a configuration as described above, a combination chute having a relatively simple structure, and capable of high-speed operation regardless of the properties of most objects to be weighed. There exists an effect that an apparatus can be provided.
- FIG. 1 (a) is a schematic schematic view of a partial cross section of the combination weigher of Configuration Example 1 of Embodiment 1 of the present invention as viewed from the side force
- FIG. ) Is a schematic diagram of the collective chute, weighing hopper, and memory hopper of the combination weigher as viewed from above
- Fig. 1 (c) shows the lower shoe of the combination weigher.
- FIG. 2 is a timing chart when the combination weigher of Configuration Example 1 of Embodiment 1 of the present invention is configured to perform a double shift operation.
- FIG. 3 is a timing chart in the case where the combination weigher of Configuration Example 1 of Embodiment 1 of the present invention is configured to perform a triple shift operation.
- FIG. 4 (a) is a schematic diagram showing the collective chute, the weighing hopper, and the memory hopper of the combination weigher of the configuration example 2 of the first embodiment of the present invention as viewed from above
- FIG. 3 is a schematic diagram showing the lower chute of the combination weigher viewed upward.
- FIG. 5 (a) is a schematic schematic view of a partial cross section of the combination weigher of configuration example a of Embodiment 2 of the present invention viewed from the side force
- FIG. 5 (c) is a schematic view of the combination chute, the weighing hopper, and the memory hopper of the combination weigher as viewed from above
- FIG. 5 (c) is a schematic diagram of the lower shunt of the combination weigher as viewed from above.
- FIG. 6 is a flowchart showing a procedure of a first combination process in the combination weigher according to the second embodiment of the present invention.
- FIG. 7 is a timing chart showing the operation of the combination weigher of configuration example a of the second embodiment of the present invention.
- FIG. 8 is a flowchart showing a procedure of second combination processing in the combination weigher of Embodiment 2 of the present invention.
- Fig. 9 is a schematic schematic view of the collective chute, the weighing hopper, and the memory hopper of the combination weigher of the configuration example b of the second embodiment of the present invention as viewed from above, and Fig. 9 (b) Fig. 3 is a schematic diagram showing the lower chute of the combination weigher viewed upward.
- FIG. 10 is a timing chart showing the operation of the combination weigher of the configuration example c of the second embodiment of the present invention.
- FIG. 11 (a) is a cross-sectional view showing a schematic configuration of an example of a packaging machine installed below the combination weigher of configuration example c of Embodiment 2 of the present invention
- FIG. 11 (b) Fig. 3 is a schematic plan view of the packaging machine viewed from above.
- FIGS. 12 (a), 12 (b), and 12 (c) are schematic diagrams showing other examples of hotspots used in the combination weighers according to Embodiments 1 and 2 of the present invention, in which the upward force is also viewed.
- FIG. FIG. 13 is a schematic schematic view of a partial cross section of the first conventional combination weigher when viewed from the side force.
- FIG. 14 (a) is a schematic diagram of a partial cross section of the combination weigher of the second conventional example viewed from the side
- FIG. 14 (b) is an assembly chute and a metering of the combination weigher.
- FIG. 3 is a schematic diagram showing the hopper as viewed from above.
- FIG. 1 (a) is a schematic schematic view of a partial cross section of the combination weigher (weighing device) of Configuration Example 1 of Embodiment 1 of the present invention viewed from the side
- FIG. 1 (b) is the same combination
- Fig. 1 (c) is a schematic diagram of the balance chute (inner shout and outer chute), the weighing hopper, and the memory hopper as viewed from above
- Fig. 1 (c) is a schematic diagram of the lower chute of the combination scale as viewed from above. It is.
- a center base body (body) 11 is arranged at the center of the apparatus supported by, for example, four legs (not shown), and on the upper part thereof, External supply
- a conical dispersion feeder 1 that disperses the object to be weighed supplied from the apparatus radially by vibration is provided.
- a plurality of linear feeders 2 for feeding an object to be weighed sent from the dispersion feeder 1 to each supply hopper 3 by vibration.
- a supply hopper 3 a weighing hopper 4 and a memory hopper 5 are provided correspondingly, and a plurality of the supply hopper 3, the weighing hopper 4 and the memory hopper 5 are circled around the center base body 11.
- the dispersion feeder 1, the linear feeder 2, the supply hopper 3, the weighing hopper 4, and the memory hopper 5 are attached to the center base 11, and their drive units (the vibrations of the dispersion feeder 1 and the linear feeder 2) are installed in the center base 11.
- Equipment, gate hoppers for supply hopper 3, weighing hopper 4, and memory hopper 5, etc. are installed in the center base 11.
- Each weighing hopper 4 is attached with a weight sensor 41 such as a load cell for measuring the weight of an object to be weighed in the weighing hopper 4, and the weight sensor 41 is also housed in the center base body 11 together with the drive unit.
- the measurement value by each weight sensor 41 is output to the control unit 20.
- Each memory hopper 5 is disposed below each weighing hopper 4 and inward from the weighing hopper 4.
- the inward direction is a direction in which the weighing hopper 4 and the memory hopper 5 are directed toward the center of the circle in which the weighing hopper 4 and the memory hopper 5 are arranged in a circle, and the opposite direction is referred to as the outward direction.
- two inner chutes 6a and 6b each having a substantially inverted frustoconical chute divided into two are arranged, corresponding to the inner chutes 6a and 6b.
- Outer chutes 7a and 7b are arranged along the outer sides of the inner chutes 6a and 6b.
- Each weighing hopper 4 has a configuration in which two gates (not shown) are provided so that the objects to be weighed can be selectively discharged to the memory hopper 5 below and the outer chute 7a or 7b.
- each weighing hopper 4 has a gate (hereinafter referred to as “inner gate”) for discharging an object to be measured to the memory hopper 5 and an object for discharging the object to be discharged to the outer chute 7a or 7b.
- a gate hereinafter referred to as “outer gate” is provided.
- each memory hopper 5 has a configuration in which two gates (not shown) are provided so that the objects to be weighed can be selectively discharged to the inner chute 6a or 6b and the outer chute 7a or 7b below the memory hopper 5. is there. That is, each memory hopper 5 has a gate (hereinafter referred to as a gate) for discharging an object to be measured to the inner chute 6a or 6b. (Hereinafter referred to as “inner gate”) and a gate (hereinafter referred to as “outer gate”) for discharging the object to be measured to the outer chute 7a or 7b.
- the shape, the inner gate 22 and the outer gate 23 are schematically shown close to the actual one of the weighing hopper 4 or the memory hopper 5.
- each inner chute 6a, 6b has an arcuate upper end edge corresponding to the arrangement shape (arc shape) of the corresponding group A and B hotspots, and a discharge port 6ae below the center of the arc. 6be is provided.
- Collective hoppers 8a and 8b for temporarily holding and discharging the objects to be weighed are disposed at the lower discharge ports 6ae and 6be, respectively.
- Each of the outer chutes 7a and 7b arranged along the outside of each of the inner chutes 6a and 6b has an arcuate upper edge, and the outlets 7ae and 7be are formed below the center of the arc. Is provided.
- Collective hoppers 9a and 9b for temporarily holding and discharging the objects to be weighed are arranged at the lower discharge ports 7ae and 7be, respectively.
- the linear feeder 2, the supply hopper 3, the inner chute 6a, the outer chute 7a, and the collective hopper 8a which include the weighing hopper 4 and the memory hopper 5 of group A and are arranged corresponding to the group A
- the part composed of 9a is called the first combination weighing part.
- it includes the weighing hopper 4 and the memory hopper 5 of group B, and is arranged corresponding to group B.
- the linear feeder 2, the supply hopper 3, the inner chute 6b, the outer chute 7b, and the collecting hoppers 8b, 9b This part is called the second combination weighing part.
- a lower chute 10a that receives an object to be weighed discharged from the collecting hoppers 8a and 9a and discharges it from the lower discharge port lOae is disposed below the collecting hoppers 8b and 9b of the second combination weigher section. It is arranged below the collecting hoppers 8b and 9b of the second combination weigher section. It is arranged below the collecting hoppers 8b and 9b of the second combination weigher section.
- the first combination weigher unit and the second combination weigher unit are controlled by the control unit 20 so as to operate as one combination weigher.
- the measured value of the object to be weighed in the memory hopper 5 used in this combination processing is a measured value when measured by the weight sensor 41 in the weighing hopper 4 above the measured value.
- the sum of the measured values (combined weight value) is closest to the target weight value (the combination that matches the target weight value is If there is any combination), that is, the combination having the smallest absolute value of the difference between the total weight value and the target weight value is determined as the appropriate amount combination.
- an appropriate amount combination is a discharge combination.
- a target weight value and an allowable range for the target weight value are determined in advance.
- the allowable range is determined, for example, with a target weight value as a lower limit value and a value larger than the target weight value as an upper limit value.
- the target weight value force OOg is set, and the allowable range is set to 400 g, whose lower limit is the target weight value, and its upper limit is 420 g, which is larger than the target weight value.
- the allowable range may be a value lower than the target weight value as the lower limit value and not set an upper limit value (in this case, the upper limit value may be considered as infinite).
- the allowable range for the target weight value is set to a range that is equal to or greater than the target weight value, that is, when the lower limit value of the allowable range is set to a value that is equal to the target weight value.
- the absolute value of the difference between the combined weight value and the target weight value, which is the sum, is equal to the value (difference) obtained by subtracting the target weight value from the combined weight value.
- combination hoppers 4 and 5 are referred to as combination hoppers 4 and 5.
- the object to be weighed supplied from the external supply device to the dispersion feeder 1 is supplied from the dispersion feeder 1 to each supply hopper 3 via each linear feeder 2, and from each supply hopper 3 to each measurement hopper 4. A sample is put in.
- the weight of the object to be weighed in each weighing hopper 4 is measured by each weight sensor 41, and the measured value is sent to the control unit 20.
- An object to be weighed by the weighing hopper 4 is supplied to the memory hopper 5 if the memory hopper 5 below it is empty. Then, for each combination weighing unit, the combination processing described above is performed to determine the discharge combination (appropriate amount combination). Then, the objects to be weighed are discharged from the combination hoppers 4 and 5 selected as the discharge combination.
- the weighing object 4 When the weighing object 4 is held in the weighing hopper 4 above the empty memory hopper 5, the weighing object is loaded from the weighing hopper 4 into the empty memory hopper 5. In addition, an object to be weighed is fed from the supply hopper 3 to the weighing hopper 4 which has become empty. In addition, the objects to be weighed are supplied from the linear feeder 2 to the empty supply hopper 3.
- the combination processing is sequentially performed on each combination weighing unit, and the objects to be weighed are discharged from the combination hoppers 4 and 5 selected for the discharge combination.
- the direction of discharge from the combination hoppers 4 and 5 is switched for each discharge combination determined by reason.
- the objects to be weighed are alternately discharged from the combination hoppers 4 and 5 to the inner chutes 6a and 6b and the outer chutes 7a and 7b for each discharge combination determined sequentially.
- the objects to be weighed are alternately discharged from the inner chute collecting hoppers 8a, 8b and the outer chute collecting hoppers 9a, 9b.
- the measured materials of the combination hoppers 4 and 5 obtained for each combination process are alternately transferred to the inner chute 6a and the outer chute 7a.
- the weighing hopper 4 is selected as the discharge combination only when the corresponding memory hopper 5 arranged below is selected.
- the inner gates of the weighing hopper 4 and the memory hopper 5 are opened to discharge the object to be weighed, and the object to be weighed discharged from the weighing hopper 4 passes through the memory hopper 5 and is discharged to the inner chute 6a. Is done.
- the memory hopper 5 can be freely selected as the discharge combination. Further, in the combination processing for obtaining the discharge combination to be discharged to the outer chute 6a, the weighing hopper 4 and the memory hopper 5 can be freely selected as the discharge combination. The same applies to the second combination weighing unit.
- each of the first and second combination weighers is configured to perform a double shift operation
- the number of the weighing hopper 4 and the memory hopper 5 is set to 9 or 10, and the planned selection number by the combination processing (the combination selected as an appropriate combination). If the number of hoppers 4 and 5 is 4), good combination weighing accuracy can be obtained.
- Setting the number of pre-selected items by combination processing to four means that the target input amount of the objects to be weighed at one time from each supply hopper 3 to the weighing hopper 4 is approximately 1Z4 of the target weight value.
- the operation setting of the linear feeder 2 etc. is made.
- FIG. 2 is a timing chart in the case where each combination weigher unit of the combination weigher of the configuration example 1 of the present embodiment is configured to perform a double shift operation.
- One operation cycle time Tw in each combination weigher unit is selected as the discharge combination immediately after the discharge combination is determined by the combination process in the immediately preceding operation cycle, and the weighing hopper 4 ( When the weighing hopper 4 is selected as the discharge combination), the measured object is discharged, and then the measured object is loaded into the weighing hopper 4 of the discharge combination, and the stabilization time of the weight sensor 41 has elapsed. This is the time required for the combination process to be performed after measuring the weight of the object to be weighed in the weighing hopper 4 and thereby determining the discharge combination.
- one weighing cycle time is determined by, for example, the combination processing in the immediately preceding operation cycle, and is selected as the discharge combination, and the weighing hopper 4 (the weighing hopper 4 is selected as the discharge combination). From the time when the object to be weighed begins to be discharged The objects to be weighed are put into the weighing hopper 4 of the combination, and after the stabilization time of the weight sensor 41 has passed, the weighting of the objects to be weighed in the weighing hopper 4 is measured and the combination processing is performed, thereby determining the discharge combination. This is the time it takes to be done.
- 1 Operation cycle time Tw etc. Force to make 1 operation cycle time Tw equal to 1 weighing cycle time It is preferable for high speed operation. Therefore, in this embodiment, 1 operation cycle time Tw is equal to or substantially equal to 1 weighing cycle time. It is set to be.
- each combination weigher unit has a weighing object whose weight value has been measured by each weight sensor 41 out of all the combination hoppers 4 and 5! /
- the combination calculation is performed using the weighing values of the hoppers 4 and 5 (the weight value of the object to be weighed), and one combination of the hoppers 4 and 5 for the combination whose total weight value is within the specified weight range is obtained.
- the combined value of all the combination hoppers 4 and 5 is used by combination calculation in two consecutive combination processes.
- each combination weigher unit the combination process is repeated every TwZ for 2 hours, and the weighed material is discharged from the combination hoppers 4 and 5 of the appropriate combination in combination with the inner chutes 6a and 6b for each appropriate combination.
- the chutes 7a and 7b are alternately carried out, and the objects to be weighed are alternately discharged from the collecting hoppers 8a and 8b and the collecting hoppers 9a and 9b.
- the objects to be weighed are put into the packaging machine from each combination weighing unit twice within one operation cycle time Tw.
- 1 discharge cycle time Tdl of each combination weighing unit is 1Z2 time of 1 operation cycle time Tw.
- One discharge cycle time Tdl is the same as one packaging cycle time Tpl of the packaging machine.
- each combination weigher unit the force that the measurement values of all the combination hoppers 4 and 5 are used by the combination calculation in two consecutive combination processes.
- the measured value is not always used.
- the total number of combination hoppers 4 and 5 in each combination weigher is large.
- the measurement values of all the combination hoppers 4 and 5 can be obtained by two consecutive combination calculations. Sometimes not used.
- the control unit 20 opens the gates of the inner chute collecting hoppers 8a and 8b in response to the charging command signal and discharges the objects to be weighed to the packaging machine. (Time tl). Then, the inner gates of the combination hoppers 4 and 5 selected as appropriate combinations based on the operation timing of the gates of the collecting hoppers 8a and 8b are opened, and the weighed from the combination hoppers 4 and 5 to the inner chutes 6a and 6b The object is discharged (time tl).
- the gates of the outer chute collecting hoppers 9a and 9b are opened in response to the input command signal, and the objects to be weighed are discharged to the packaging machine (time t2). Then, based on the operation timing of the gates of the collective hoppers 9a and 9b, an appropriate amount combination is selected, and the outer gates of the combination hoppers 4 and 5 are opened, and the combination hoppers 4 and 5 also have the outer chute 7a, To 7b, discharge the object to be weighed (time t2).
- the gates of the inner chute collecting hoppers 8a and 8b are opened in response to the input command signal, and the objects to be weighed are discharged to the packaging machine and selected as an appropriate combination. Open the inner gates of the combination hoppers 4 and 5 and discharge the objects to be weighed from the combination hoppers 4 and 5 to the inner chutes 6a and 6b (time t3). Thereafter, the same is repeated.
- the objects to be weighed discharged from the combination hoppers 4 and 5 when the inner gate is opened at time tl are transferred to the inner chute collecting hoppers 8a and 8b until time t3.
- the collected hoppers 8a and 8b are opened and discharged to the packaging machine at time t3.
- the outer gate is opened and the objects to be discharged from the combination hoppers 4 and 5 are collected and held in the outer chute collecting hoppers 9a and 9b until time t4.
- the gates of the collecting hoppers 9a and 9b are opened and discharged to the packaging machine.
- the combination hopper 4 and 5 force of an appropriate amount combination also discharges the objects to be weighed alternately to the inner chutes 6a and 6b and the outer chutes 7a and 7b, and accordingly, the inner shoot collecting hopper 8a 8b and the outer chute collecting hoppers 9a and 9b are alternately discharged to the packaging machine.
- the opening / closing timing of the gates of the collecting hoppers 8a, 8b and the opening / closing timing of the inner gates of the combination hoppers 4, 5 are the same, and the collecting hoppers 9a, 9b
- the opening / closing timing of the gate and the opening / closing timing of the outer gates of the combination hoppers 4 and 5 are the same, but this is not restrictive.
- the control unit 20 controls the opening / closing timing of the gates of the combination hoppers 4 and 5 based on the opening / closing timing of the gates of the collecting hoppers 8a, 8b, 9a, and 9b. Use a different timing.
- each combination weigh unit is discharged to the packaging machine every TwZ2 hours, and at twice the speed of the single shift operation. High-speed discharge is possible, and the production volume (total number of combined discharges to the packaging machine) within a predetermined time can be improved, and it can be applied to a packaging machine that operates at high speed.
- each combination weighing unit is configured to perform a triple shift operation.
- the number of weighing hoppers 4 and memory hoppers 5 should be 11 or 12, and the planned selection number by combination processing should be 4. Accurate combination weighing accuracy.
- FIG. 3 is a timing chart in the case where each combination weighing unit of the combination weigher of Configuration Example 1 of the present embodiment is configured to perform a triple shift operation.
- each combination weigher unit has a weighing object whose weight value has been measured by each weight sensor 41 out of all the combination hoppers 4 and 5.
- Combination calculation is performed using the measurement values of 4 and 5 (weight value of the object to be weighed), and the total of the measurement values becomes a value within the specified weight range.
- the weight values of all the combination hoppers 4 and 5 are used by combination calculation in three consecutive combination processes.
- each combination weigher the combination process is repeated every TwZ for 3 hours, and the weighed objects are discharged from the combination hoppers 4 and 5 of the appropriate amount combination. 7a and 7b are alternately carried out, and in accordance with this, the objects to be weighed are discharged alternately from the collecting hoppers 8a and 8b and the collecting hoppers 9a and 9b.
- 1 discharge cycle time Td2 of each combination weighing unit is 1Z3 time of 1 operation cycle time Tw.
- One discharge cycle time Td2 is the same as one packaging cycle time Tp2 of the packaging machine.
- each combination weigher the force that the measured values of all the combination hoppers 4 and 5 are used by the combination calculation in three consecutive combination processes is not necessarily all the combination hoppers 4 and 5
- the measured value is not always used.
- the total number of combination hoppers 4 and 5 in each combination weigher is large, the number of measurement values used in one combination operation is limited, that is, the number is continuously determined by determining the number in advance. In some cases, all combination hoppers 4 and 5 are not used after three combination calculations.
- the control unit 20 opens the gates of the inner chute collecting hoppers 8a and 8b in response to the input command signal and discharges the objects to be weighed to the packaging machine. (Time ti l). Then, the inner gates of the combination hoppers 4 and 5 selected as appropriate combinations based on the operation timing of the gates of the collecting hoppers 8a and 8b are opened, and the combination hoppers 4 and 5 are moved to the inner chutes 6a and 6b. Drain the sample (time ti l).
- the gates of the outer chute collective hobbies 9a and 9b are opened in response to the input command signal, and the objects to be weighed are discharged to the packaging machine (time tl2). Then, based on the operation timing of the gates of the combined hoppers 9a and 9b, an appropriate combination is selected! Open the outer gates of the combination hoppers 4 and 5, and from the combination hoppers 4 and 5 to the outer chute 7 Drain the object to be measured to a and 7b (time tl2).
- the gates of the inner chute collecting hoppers 8a and 8b are opened in response to the input command signal, and the objects to be weighed are discharged to the packaging machine, and the appropriate combination is selected. Open the inner gates of the combination hoppers 4 and 5 and discharge the objects to be weighed from the combination hoppers 4 and 5 to the inner chutes 6a and 6b (time tl3). Thereafter, the same is repeated.
- the collected hoppers 8a and 8b open at time tl3 and are discharged to the packaging machine.
- the outer gate is opened and the objects to be discharged from the combination hoppers 4 and 5 are collected and held in the outer chute collecting hoppers 9a and 9b until time tl4.
- the gates of the collecting hoppers 9a and 9b are opened and discharged to the packaging machine.
- Control part 20 force For example, by controlling the gate opening / closing timing of the yarn merging hoppers 4 and 5 based on the timing of the gate opening / closing of the collecting hoppers 8a, 8b, 9a and 9b The timing can be different.
- each combination weigh unit is discharged to the packaging machine every TwZ 3 hours, and at a speed three times that of the single shift operation. High-speed discharge is possible, the production volume can be improved within a predetermined time, and it can be applied to a packaging machine that operates at high speed.
- the control unit 20 causes the first combination weighing unit and the second combination weighing unit to operate at the same timing.
- the input command signal for the first combination weighing unit and the input command signal for the second combination weighing unit are input from the packaging machine to the control unit 20, and the control unit 20 Control the operation of each combination weighing unit according to the command signal.
- each combination weigher unit the group A of combination hoppers 4 and 5 arranged in an arc shape with a central angle of approximately 180 degrees or less (in the case of configuration example 1 semicircular)
- the inner chutes 6a and 6b are arranged corresponding to B, and the outer chutes 7a and 7b are arranged along the outer sides thereof, so that the structure of the collective chutes (inner chutes and outer chutes) is relatively simple.
- the transfer distances of the objects to be weighed discharged from the combination hoppers 4 and 5 to the inner chutes 6a and 6b or the outer shots 7a and 7b to the collective hoppers 9a and 9b are substantially the same.
- FIG. 4 (a) is a schematic view of the collective shunt (inner chute and outer chute), the weighing hopper and the memory hopper of the combination weigher (weighing device) of the configuration example 2 of the first embodiment of the present invention in terms of upward force.
- Fig. 4 (b) is a schematic diagram of the lower chute of the combination weigher viewed upward.
- the configuration includes two combination weighing units, whereas in this configuration example, the configuration includes three combination weighing units.
- three outer chutes 7a, 7b, 7c are arranged corresponding to the three loops kB, C, and the lower outlets 7ae, 7be, 7ce of each outer chute 7a, 7b, 7c are to be weighed.
- Collective hoppers 9a, 9b, and 9c for temporarily holding and discharging the objects are provided.
- the combination weighing unit including group A is the first combination weighing unit
- the combination weighing unit including group B is the second combination weighing unit
- the combination weighing unit including group C is the third combination weighing unit. .
- a lower chute 10a for receiving the objects to be weighed discharged from the collecting hoppers 8a and 9a and discharging them from the lower discharge port lOae is disposed below the collecting hoppers 8b and 9b of the second combination weigher section. It is arranged below the collecting hoppers 8b and 9b of the second combination weigher section. It is arranged below the collecting hoppers 8b and 9b of the second combination weigher section. It is arranged.
- a lower chute 10c for receiving the objects to be weighed discharged from the collecting hoppers 8c and 9c and discharging it from the lower discharge port 10ce is disposed below the collecting hoppers 8c and 9c of the third combination weigher unit. ing.
- Weighed objects discharged from the collection hoppers 8b and 9b of the section are put into the second packaging machine inlet through the lower chute 10b, and are measured to be discharged from the collection hoppers 8c and 9c of the third combination weighing section It is configured to feed a mass into the third packaging machine inlet through the lower chute 10c.
- a control unit 20 (see Fig. 1 (a)) is provided, and the control unit 20 controls the operation of the entire combination weigher of this configuration example, and each of the first, second, and third combinations.
- combination processing is performed to determine the combination (discharge combination) of the weighing hopper 4 and the memory hopper 5 that should discharge the object to be weighed.
- the combination process in each combination weigher is the same as in the configuration example 1.
- each combination weigher unit performs the double shift operation and the configuration in which the combination shift unit performs the triple shift operation may be configured in the same manner as in the configuration example 1.
- the timing chart of the first and second combination weigher units is the same as that shown in FIG.
- the combination weighing unit is the same as the timing chart of the first and second combination weighing units.
- the first, second, and third combination weigher units When each of the first, second, and third combination weigher units is to perform a triple shift operation, the first The timing chart of the second combination weigher unit is the same as, for example, FIG. 3, and the third combination weigher unit is the same as the timing chart of the first and second combination weigher units.
- control unit 20 controls the first, second, and third combination weighing units to operate at the same timing. It is also possible to control each of the first, second and third combination weighing units to operate at different timings.
- the input command signal for the first combination weigher unit, the input command signal for the second combination weigher unit, and the input command signal for the third combination weigher unit are the control unit 20. So that the control unit 20 controls the operation of each combination weighing unit in response to each input command signal.
- each combination weigher unit performs a double shift operation and the configuration in which a triple shift operation is performed are described.
- a configuration in which a single shift operation with a low operation speed (discharge speed) is performed may be used.
- discharge speed a low operation speed
- the combination calculation is performed once, the discharging operation by the combination hoppers 4 and 5 is performed once, and the packaging hopper is packed. The machine is ejected once.
- one discharge cycle time of the combination weigher is the same as one operation cycle time Tw.
- FIG. 5 (a) is a schematic schematic view of a partial cross section of the combination weigher (weighing device) of configuration example a of the second embodiment of the present invention viewed from the side
- FIG. 5 (b) is the same combination
- Fig. 5 (c) is a schematic diagram of the balance chute (inner shout and outer chute), the weighing hopper and the memory hopper as viewed from above
- Fig. 5 (c) is a schematic diagram of the lower chute of the combination weigher as viewed from above. It is.
- the combination weigher a has two lower chutes as shown in Fig. 5 (c). 10a and 10b are arranged below the four collecting hoppers 8a, 8b, 9a and 9b.
- the collecting hopper 8a and the collecting hopper 9b are gates (not shown) so that the objects to be weighed can be discharged to one lower chute 10a.
- the collecting hopper 8b and the collecting hopper 9a are provided with a gate (not shown) so that the objects to be weighed can be discharged to the other lower shot 10b.
- the objects to be weighed discharged to the lower chutes 10a and 10b are discharged from the respective outlets 10ae and 10be.
- the configuration other than the above is the same as the configuration example 1 of the first embodiment shown in FIG. 1, and the description thereof is omitted.
- the combination processing and operation timing by the control unit 20 are different from those in the configuration example 1 of the first embodiment.
- the portion including the weighing hopper 4 and the memory hopper 5 of group A and arranged corresponding to group A is the first combination weighing section.
- the portion including the weighing hono 4 of group B and the memory hopper 5 and arranged corresponding to group B is the second combination weighing unit.
- the lower chutes 10a and 10b of the yarn and weigh balance there are two unillustrated wrapping machines or a twin type wrapping machine having two input ports for objects to be weighed.
- the objects to be weighed discharged from the outlet 10ae of the lower chute 10a and the outlet 10be of the lower chute 10b are put into different packaging machine inlets (first and second packaging machine inlets), respectively.
- Each package is packed with a packaging machine.
- the objects to be weighed discharged from the collecting hopper 8a of the first combination weigher unit and the collecting hopper 9b of the second combination weigher unit are transferred to the first packaging machine input port via the lower chute 10a.
- the objects to be discharged from the collecting hopper 9a of the first combination weighing unit and the collecting hopper 8b of the second combination weighing unit into the second packaging machine inlet through the lower chute 10b.
- the control unit 20 includes a control unit and a combination calculation unit of each combination weigher unit, controls the operation of the entire combination weigher unit, and measures the measured object for each of the first and second combination weigher units. Determine the combination (discharge combination) of the weighing hopper 4 and the memory hopper 5 that should be discharged. In the combination processing, the combination calculation is performed based on the weight value (measured value by the weight sensor 41) of the objects to be weighed in the weighing hopper 4 and the memory hopper 5, and the total of the measured values is obtained.
- a certain combination weighing value is the target weight
- Two combinations of weighing hopper 4 and memory hopper 5 that fall within the allowable range (predetermined weight range) for the value are obtained, and each is determined as a discharge combination.
- the measured value of the object to be weighed in the memory hopper 5 used in the combination processing is a measured value when measured by the weight sensor 41 in the upper weighing hopper 4. Details of this combination processing will be described later.
- the object to be weighed supplied from the external supply device to the dispersion feeder 1 is supplied from the dispersion feeder 1 to each supply hopper 3 via each linear feeder 2, and from each supply hopper 3 to each measurement hopper 4. A sample is put in.
- the weight of the object to be weighed in each weighing hopper 4 is measured by each weight sensor 41, and the measured value is sent to the control unit 20.
- An object to be weighed by the weighing hopper 4 is supplied to the memory hopper 5 if the memory hopper 5 below it is empty. Then, for each combination weighing unit, the combination processing by the control unit 20 is performed, and two discharge combinations are simultaneously determined.
- the objects to be weighed are discharged from the combination hoppers 4 and 5 selected as the two discharge combinations in each combination weighing unit. If the weighing object is held in the weighing hopper 4 above the empty memory hopper 5, the weighing object is put into the empty memory hopper 5 from the weighing hopper 4. In addition, an object to be weighed is fed from the supply hopper 3 to the weighing hopper 4 which has become empty. In addition, the material to be weighed is supplied from the linear feeder 2 to the empty supply hono 3.
- each combination weigher unit the discharge directions from the combination hoppers 4 and 5 of the two discharge combinations simultaneously determined by the combination process are made different. That is, in each combination weigher unit, the object to be weighed is discharged from the combination hoppers 4 and 5 of one of the two discharge combinations to the inner chute (6a, 6b). The object to be weighed is discharged from the combination hoppers 4 and 5 of the other discharge combination to the outer chutes (7a and 7b). Also, the objects to be weighed are discharged simultaneously from the collecting hopper for inner chute (8a, 8b) and the collecting hopper for outer chute (9a, 9b).
- the weighing hopper 4 is selected in the discharge combination discharged to the inner chute 6a out of the two discharge combinations. Only when the corresponding memory hopper 5 arranged below is selected together. In this case, the inner gates of the weighing hopper 4 and the memory hopper 5 are opened to discharge the object to be weighed, and the object to be weighed discharged from the weighing hopper 4 passes through the memory hopper 5 and is discharged to the inner chute 6a. Is done.
- the memory hopper 5 can be freely selected for the discharge combination discharged to the inner chute 6a.
- the weighing hopper 4 and the memory hopper 5 can be freely selected for the discharge combination discharged to the outer chute 6a. The same applies to the second combination weigher.
- FIG. 6 is a flowchart showing the combination processing of an arbitrary combination weigher unit in the present embodiment.
- the combination processing shown in steps S1 to S4 is performed on each of the first and second combination weighing units.
- step S1 combination calculation is performed in any combination weighing unit using the measurement values of the objects to be weighed supplied to all the combination hoppers 4 and 5 in the combination weighing unit. Therefore, find all combinations where the combined measurement value, which is the sum of the measurement values, falls within the allowable range for the target weight value, and make each combination an appropriate combination.
- step S2 an appropriate amount combination set (a pair of appropriate amount combinations) obtained by combining two appropriate amount combinations not including the same combination hoppers 4 and 5 is obtained.
- the weighing hopper 4 is selected for both of the two proper combinations to be combined, and the memory hopper 5 corresponding to the weighing hopper 4 is selected and selected.
- the appropriate combination of the two sets is excluded from the appropriate combination set. Therefore, when the weighing hono 4 is selected for both of the two appropriate amount combinations constituting the appropriate amount combination set, at least one appropriate amount combination is stored in the memory hopper 5 corresponding to the selected weighing hono 4. Must be selected.
- step S3 for each appropriate amount combination set !, the absolute value of the difference between the combination weight value of each appropriate amount combination and the target weight value that constitutes the appropriate amount combination set is obtained, and the difference between them is calculated. Calculate the sum of absolute values.
- the absolute value of the difference between the combination weighing value and the target weight value is the absolute value obtained by subtracting the target weight value from the combination weighing value, or the target weight value force is the absolute value obtained by subtracting the combination weighing value. Will be zero or positive.
- step S4 one appropriate combination set having the minimum sum of absolute values of the differences obtained in step 3 is selected, and one of the two appropriate combination sets constituting the set is selected as the inner shot.
- the method for determining the combination as the first discharge combination and the second discharge combination may be any method as long as it is determined in advance. For example, a number is assigned to each memory hopper 5 in order, and an appropriate amount combination including the smallest memory hopper 5 is determined as the first discharge combination, and the other appropriate amount combination is set as the second discharge amount combination. It may be determined to be an emission combination or vice versa. Alternatively, it may be determined depending on the magnitude of the combination weighing value. For example, the appropriate combination with the larger combination weighing value is determined as the first discharge combination, and the combination weighing value is smaller! However, the appropriate combination of the two may be determined as the second discharge combination, or vice versa. Alternatively, each time the combination process is performed, the combination weighing value is determined to be the first emission combination and the second emission combination alternately. You may leave it.
- steps S3 and S4 for each appropriate combination set, the sum of the absolute values of the difference between the combination weight value of each appropriate amount combination and the target weight value is calculated, and the sum of the absolute values of the differences is the smallest.
- the appropriate combination set is selected and two discharge combinations are determined.
- the square of the difference between the combination weighing value of each appropriate combination and the target weight value is squared. It is possible to calculate the sum of the two and select one appropriate combination set that has the smallest sum of the squares of the differences to determine the two discharge combinations.
- FIG. 7 is a timing chart showing the operation of the combination weigher of the configuration example a of the present embodiment.
- One operation cycle time Tw in each combination weigher is selected as the two discharge combinations immediately after the two discharge combinations are determined by the combination processing in the immediately preceding operation cycle, for example.
- Weighing hopper 4 (when weighing hopper 4 is selected as the discharge combination) Force The object to be weighed is discharged, and then the object to be weighed is inserted into the weighing hopper 4 of that discharge combination, and the weight sensor 41 This is the time required to determine the two discharge combinations by the next combination process after measuring the weight of the object in the weighing hopper 4 after the stable time has elapsed.
- 1 weighing cycle time is determined, for example, by the combination processing in the immediately preceding operation cycle, and is selected as 2 discharge combinations, and weighing hopper 4 (weighing hopper 4 is selected as a discharge combination).
- the object to be weighed begins to be discharged, the object to be weighed is then loaded into the weighing hopper 4 of the two discharge combinations, and the stable time of the weight sensor 41 has passed. This is the time it takes for the two discharge combinations to be determined by the next combination process after measuring the weight of the object in the weighing hopper 4. Therefore, 1 weighing cycle time is a margin time or waiting time until the weighing object starts to be discharged from the hopper selected for the two discharge combinations after the two discharge combinations are determined by the combination processing. It is equal to one operation cycle time Tw when etc. are zero. Since it is preferable to make 1 operation cycle time Tw equal to 1 weighing cycle time for high speed operation, in this embodiment, 1 operation cycle time Tw is equal to 1 weighing cycle time, V, time, Or set the time to be almost equal! /
- each combination weigher unit performs a combination process for simultaneously determining two discharge combinations every Tw time, and simultaneously applies the two discharge combination combination hoppers 4 and 5 determined in the combination process. Weighing material is discharged. Also, every Tw time, the inner shoot collecting hot The objects to be weighed are discharged simultaneously from the hopper (8a, 8b) and the outer chute collecting hopper (9a, 9b). As a result, in each combination weigher section, two sets of discharge combinations to be weighed are put into the packaging machine within one operation cycle time Tw. In this case, one discharge cycle time Td3 of each combination weighing unit is the same as one operation cycle time Tw. In addition, 1 discharge cycle time Td3 is twice as long as 1 packaging cycle time Tpl of the packaging machine.
- the control unit 20 responds to the input command signal by, for example, the inner chute collecting hopper 8a and the outer shunt of the first combination weigher unit. Simultaneously open the gate of the collecting hopper 9a and discharge the objects to be measured to the packaging machine (time t Do and the combination selected for one of the discharging combinations based on the operation timing of the gates of the collecting hoppers 8a and 9a) Open the inner gates of the hoppers 4 and 5 and discharge the objects to be measured to the inner chute 6a. At the same time, open the outer gates of the combination hoppers 4 and 5 selected for the other discharge combination and move to the outer chute 7a.
- the gates of the inner shoot collecting hopper 8b and the outer chute collecting hopper 9b of the second combination weigher are simultaneously opened to measure the object to be weighed. Wrap things (Time t2), and based on the operation timing of the gates of the collecting hoppers 8b and 9b, the inner gates of the combination hoppers 4 and 5 selected for one of the discharge combinations are opened and the inner chute is opened. At the same time that the object to be weighed is discharged to 6b, the outer gate of the combination hoppers 4 and 5 selected for the other discharge combination is opened, and the object to be weighed is discharged to the outer chute 7b (time t2). The above operation is repeated every time a command signal is input (time t3, t4, t5).
- the inner gate is opened, and the objects to be weighed discharged from the combination hoppers 4 and 5 are moved to the inner side until time t3. Collected and held in the chute collecting hopper 8a, the gate of the collecting hopper 8a is opened at time t3, and the objects to be weighed in the collecting hopper 8a pass through the lower chute 10a and are fed into the first packaging machine inlet. The Similarly, at time tl, in the first combination weigher unit, the objects to be weighed discharged from the combination hoppers 4 and 5 with the outer gate opened are collected by the outer chute collecting hopper 9a until time t3.
- the gate of the collecting hopper 9a is opened, and the objects to be weighed in the collecting hopper 9a pass through the lower chute 10b and are put into the second packaging machine inlet.
- the objects to be weighed discharged from the combination hoppers 4 and 5 when the inner gate is opened are gathered for the inner chute until time t4. Collected and held in 8b, the gate of the collection hopper 8b is opened at time t4, and the objects to be weighed in the collection hopper 8b pass through the lower chute 10b and are fed into the second packaging machine inlet.
- the objects to be weighed in which the outer gate is opened and the combination hoppers 4 and 5 are discharged are collected in the outer chute collecting hopper 9b until time t4.
- the gate of the collecting hopper 9b is opened, and the objects to be weighed in the collecting hopper 9b pass through the lower chute 10a and are fed into the first packaging machine inlet.
- the gate opening / closing timings of the inner chute and the outer chute combined hot bar and the opening / closing timings of the inner and outer gates of the combination hot bar are the same. Power is not limited to this.
- the control unit 20 controls the opening / closing timing of the inner and outer gates of the combination hopper based on the opening / closing timing of the gates of the collecting hopper. You can also vary the timing.
- the objects to be weighed are inserted into each of the two packaging machine inlets every TwZ 2 hours. Therefore, in one operation cycle time Tw, the objects to be weighed are discharged twice to the two packaging machine inlets, respectively, and the production volume (combined weighing force total number of discharges to the packaging machine) within the specified time is improved. be able to
- each combination weigher has an arc shape with a central angle of approximately 180 degrees or less (in the case of the configuration example a, a semicircle).
- the inner chutes 6a and 6b are arranged corresponding to the groups A and B of the combination hoppers 4 and 5 arranged in the shape), and the outer chutes 7a and 7b are arranged along the outside thereof.
- the structure of the collective chutes (inner chutes and outer chutes) can be made relatively simple, and the collective hoppers 9a of the objects to be weighed discharged from the combination hoppers 4 and 5 to the inner chutes 6a and 6b or the outer chutes 7a and 7b
- the transport distance up to 9b can be shortened almost equally, and all the objects discharged from the combination hoppers 4 and 5 can be reduced to the respective collection hoppers 9a and 9b regardless of the properties of most of the objects to be weighed. Can be collected in time. Therefore, the structure of the collective chute Makes it relatively easy to operate at high speeds regardless of the nature of most objects to be weighed
- each combination weighing unit two sets of objects to be weighed and discharge operations can be performed within the aforementioned one operation cycle time Tw without slowing down the operation speed.
- FIG. 8 is a flowchart showing combination processing of an arbitrary combination weigher unit in the present embodiment. In each of the first and second combination weighers, the combination process shown in steps S11 to S15 is performed.
- step S11 any combination weighing unit performs combination calculation using the measured values of the objects to be weighed supplied to all the combination hoppers 4 and 5 in the combination weighing unit. Therefore, find all combinations where the combined measurement value, which is the sum of the measurement values, falls within the allowable range for the target weight value, and make each combination an allowable combination.
- the processing in step S11 is the same as the processing in step S1 in FIG. 6, and the appropriate amount combination obtained in step S1 corresponds to the allowable combination obtained in step S11.
- step S12 a predetermined m (m is a plurality), for example, 10 is selected, giving priority to the one with the smallest absolute value of the difference between the combination weighing value and the target weight value, from all the allowable combinations.
- m is a plurality
- 10 is selected, giving priority to the one with the smallest absolute value of the difference between the combination weighing value and the target weight value, from all the allowable combinations.
- Each selected combination is the first appropriate combination.
- step S13 all the combination hoppers 4 and 5 in the combination weigher unit are combined with the combination hoppers 4 and 5 excluding the combination hoppers 4 and 5 belonging to any one first appropriate combination.
- the second appropriate amount combination corresponding to.
- the second proper amount combination corresponding to each of the m first appropriate amount combinations is obtained.
- m pieces each The second optimal combination corresponding to the first optimal combination is obtained, and m appropriate optimal combination sets (pairs of appropriate combinations) corresponding to the first optimal combination, the second optimal combination and the corresponding optimal combination are obtained. .
- the weighing hopper 4 is selected for both of the two combinations of the first appropriate amount combination and the allowable combination that is a candidate for the second appropriate amount combination, and the selection is made. Being! If the memory hopper 5 corresponding to the weighing hopper 4 is not selected, the allowable combination is not selected as the second appropriate amount combination. Therefore, when the weighing hopper 4 is selected for both of the two appropriate amount combinations constituting the appropriate amount combination set, at least one appropriate amount combination is determined by the memory hopper 5 corresponding to the selected weighing hopper 4. Must be selected.
- step S14 for each appropriate combination set, the absolute value of the difference between the combination weighing value and the target weight value of each of the first and second appropriate combination that constitutes the appropriate combination set is obtained. Calculate the sum of the absolute values of the differences.
- step S15 select an appropriate combination set that has the smallest sum of the absolute values of the differences determined in step S14, and place one of the two appropriate combinations that make up the set inside.
- the discharge combination (first discharge combination) to be discharged to the chute (6a, 6b) is determined, and the other is determined to be the discharge combination (second discharge combination) to be discharged to the outer chute (7a, 7b).
- the weighing hopper 4 is selected as one of the two appropriate combinations of the appropriate combinations that constitute the selected appropriate combination set, and the memory hopper 5 corresponding to the weighing hopper 4 is selected. If not, the appropriate combination is determined as the second discharge combination that discharges to the outer chute, and the other appropriate combination is determined as the first discharge combination that discharges to the inner chute.
- the appropriate amount combination force is included in the selected appropriate amount combination set.
- the method for determining the first emission combination and the second emission combination may be any method as long as it is determined in advance. For example, a number is assigned to each memory hopper 5 in order, and the appropriate combination that includes the smallest numbered memory hopper 5 is determined as the first discharge combination, and the other appropriate combination is the second. It may be determined to be an emission combination of vice versa, or vice versa. Alternatively, it may be determined depending on the magnitude of the combination weighing value. For example, select the appropriate combination with the larger combination weighing value.
- the first discharge combination may be determined, and the appropriate combination with the smaller combination weight value may be determined as the second discharge combination, or vice versa.
- the combination amount of the combination weighing value, the appropriate combination of the smaller ones, and the appropriate combination of the smaller ones are alternately determined as the first discharge combination and the second discharge combination. Keep it.
- steps S14 and S15 for each appropriate combination set, the sum of absolute values of the difference between the combination weight value of each proper combination and the target weight value is calculated, and the total absolute value of the differences is calculated.
- this third combination process first, in any combination weighing unit, the measured values of the objects to be weighed supplied to all the combination hoppers 4 and 5 of the combination weighing unit are used. By performing combination calculation, find all combinations where the combined measurement value, which is the sum of the measurement values, falls within the allowable range for the target weight value, and make each combination an allowable combination. Then, from among all the permissible combinations, one permissible combination having the smallest absolute value of the difference between the combination weighing value and the target weight value is selected, and this selected permissible combination is designated as the first appropriate amount combination. To do.
- one of the first appropriate amount combination and the second appropriate amount combination is determined to be the discharge combination for discharging to the inner chute (first discharge combination), and the other is discharged to the outer chute (Second emission combination)
- first discharge combination the discharge combination for discharging to the inner chute
- the outer chute the appropriate combination is selected as the outer chute.
- the second discharge combination to be discharged to the first discharge combination is determined, and the other appropriate combination is determined to be the first discharge combination to discharge to the inner chute.
- the method for determining the appropriate combination of the combination as the first emission combination and the second emission combination may be determined in advance as in the case of the second combination process described above.
- the allowable range for the target weight value is set to a range that is equal to or larger than the target weight value, that is, the lower limit value of the allowable range is the target value.
- the absolute value of the difference between the combination weighing value of the appropriate amount combination or allowable combination and the target weight value is the value obtained by subtracting the target weight value from the combination weighing value (difference) be equivalent to. Therefore, in this case, for example, in step S3 in FIG. 6 and step S14 in FIG. 8, it is not possible to calculate the sum of the absolute values of the differences between the combination weighing value of each appropriate amount combination and the target weight value. This is equivalent to calculating the sum of the difference obtained by subtracting the target weight value from the combination weighing value of each appropriate amount combination.
- the selection conditions for the first appropriate amount combination are expanded to obtain a plurality of first appropriate amount combinations as compared with the third combination process.
- the second appropriate combination corresponding to the appropriate combination is obtained, and the one with the smallest total combination measurement value of the two appropriate combinations is selected. Therefore, when the second combination process is used, it is possible to improve the combination weighing accuracy of the whole object to be discharged as compared with the case where the third combination process is used.
- the absolute value of the difference between the combination weight value of the two appropriate amount combinations and the target weight value is selected from among the appropriate amount combination sets formed by combining two of all appropriate amount combinations. Since the smallest total is selected, the combined weighing accuracy of the whole discharged object can be further improved.
- processing amount of operations decreases in the order of the first combination process, the second combination process, and the third combination process, and the time required for the combination process can be reduced in that order.
- the objects to be weighed in the collecting hopper 8a and the collecting hopper 9b are discharged to the lower chute 10a, and the objects to be weighed in the collecting hopper 9a and the collecting hopper 8b are discharged to the lower chute 10b.
- the first combination weigher section the collective hopper 8a and the collective hopper 9a of the first combination weigher section are discharged to the lower chute 10a, and the weighed object of the other collective hopper is moved to the lower part. It is configured to discharge to the chute 10b, and the weighed object of either the collecting hopper 8b or the collecting hopper 9b of the second combination weighing unit is discharged to the lower chute 10a and the other collecting hopper is weighed. If it is configured to eject objects to the lower chute 10b.
- FIG. 9 (a) shows an assembly of the combination weigher (weighing device) of the configuration example b of Embodiment 2 of the present invention.
- Fig. 9 (b) is a schematic diagram of the lower chute of the combination weigher viewed from above with the upper force of the cart (inner chute and outer chute), the weighing hopper and the memory hopper.
- the configuration includes two combination weighing units, whereas in this configuration example, the configuration includes four combination weighing units.
- the center base 11 like the configuration example a, the center base 11, the dispersion feeder 1, the linear feeder 2, the supply hopper 3, the weighing hopper 4 to which the weight sensor 41 is attached and the memory hopper shown in FIG. Since these configurations are the same as the configuration example a, the description thereof is omitted.
- all weighing hoppers 4 and memory hoppers 5 are divided into four groups A, B, C, D, and each group includes a corresponding group A, B, C, D.
- a scale is provided. Therefore, four inner chutes 6a, 6b, 6c, 6 (one self-installed, corresponding to the four groups A, B, C, D, lower outlets 6ae, 6b of each inner chute 6a, 6b, 6c, 6d
- Collective hoppers 8a, 8b, 8c, and 8d are arranged in e, 6ce, and 6de to temporarily hold and discharge the objects to be weighed, and 4 corresponding to 4 groups A, B, C, and D.
- Two outer chutes 7a, 7b, 7c, 7 (one self-installed, lower outlet of each outer chute 7a, 7b, 7c, 7d 7ae, 7be, 7c e, 7de holds and discharges the object to be weighed temporarily
- Collective hoppers 9a, 9b, 9c, and 9d are disposed, where the combination weighing unit including group A is the first combination weighing unit, and the combination weighing unit including group B is the second combination weighing unit.
- the combination weighing unit including group C is the third combination weighing unit, and the combination weighing unit including group D is the fourth combination weighing unit.
- a lower chute 10a is disposed below the collecting hopper 9a of the first combination weighing unit and the collecting hopper 9b of the second combination weighing unit, and the objects to be weighed discharged from the collecting hoppers 9a and 9b Passes through the lower chute 10a and is discharged from its outlet lOae.
- a lower chute 10b is arranged below the collecting hopper 8a of the first combination weighing unit and the collecting hopper 8b of the second combination weighing unit, and the objects to be weighed discharged from the collecting hoppers 8a and 8b are It passes through the lower chute 10b and is discharged from its outlet 10be.
- a lower chute 10c is disposed below the collective hopper 8c of the third combination weigher unit and the collective hopper 8d of the fourth combination weigh unit, and the objects to be weighed discharged from the collective hoppers 8c, 8d are Then, it passes through the lower chute 10c and is discharged from its outlet 10ce.
- the third combination weighing unit 9c and the fourth combination weighing unit 9c A lower chute lOd is disposed below the collecting hopper 9d, and the objects to be weighed discharged from the collecting hoppers 9c, 9d pass through the lower chute 10d and are discharged from the discharge port 10de.
- the lower chutes 10a, 10b, 10c, and 10d of this combination weigher there are four wrapping machines (not shown).
- the objects to be weighed discharged from the outlet 10ae of the shroud 10a, the outlet 10be of the lower chute 10b, the outlet 10ce of the lower chute 10c and the outlet 10de of the lower chute 10d are the inlets of different packaging machines. (The first through fourth packaging machine inlets) are packed and packed by the packaging machine.
- the objects to be weighed discharged from the collecting hopper 9a of the first combination weigher unit and the collecting hopper 9b of the second combination weigher unit are transferred to the first packaging machine input port via the lower chute 10a.
- the objects to be weighed discharged from the collecting hopper 8a of the first combination weighing unit and the collecting hopper 8b of the second combination weighing unit into the second packaging machine inlet through the lower chute 10b. It is structured as follows. In addition, the objects to be weighed discharged from the collection hopper 8c of the third combination weighing unit and the collection hopper 8d of the fourth combination weighing unit are introduced into the third packaging machine inlet through the lower chute 10c, and the third The weighing objects discharged from the collection hopper 9c of the combination weighing unit and the collection hopper 9d of the fourth combination weighing unit are loaded into the fourth packaging machine inlet through the lower chute 10d. .
- a control unit 20 (see Fig. 5 (a)) is provided, and the control unit 20 controls the operation of the entire combination weigher of this configuration example, and the first, second, third, and fourth For each combination weighing unit, combination processing is performed to determine the combination (discharge combination) of the weighing hopper 4 and the memory hopper 5 to which the objects to be weighed should be discharged.
- the combination processing in each combination weigher is the same as in the configuration example a.
- Configurations other than the above are the same as configuration example a, and a description thereof is omitted.
- the present configuration example b as in the configuration example a, for example, in each of the groups A, B, C, and D, the number of the weighing hopper 4 and the memory hopper 5 is set to 9 or 10, In combination processing, good combination weighing accuracy can be obtained if the number of planned selections to be selected for one appropriate combination is four.
- the operation is timed for each pair of two combination weigher units arranged adjacent to each other. In this configuration example, the first combination weighing unit and the second combination weighing unit are paired, and the third combination weighing unit and the fourth combination weighing unit are paired.
- the timing chart of the first combination weigher unit and the second combination weigher unit is, for example, the same as that of Fig. 7, and the timing chart of the third combination weigher unit and the fourth combination weigher unit is the same as that of the first combination weigher unit. This is the same as the timing chart of the combination weigher unit and the second combination weigher unit. That is, the pair of the first combination weigher unit and the second combination weigher unit and the pair of the third combination weigher unit and the fourth combination weigher unit in this configuration example are the first combination in the configuration example a. If the same operation as the pair of the scale unit and the second combination scale unit is performed, the description thereof is omitted.
- the pair of the first combination weigher unit and the second combination weigher unit and the pair of the third combination weigher unit and the fourth combination weigher unit in this configuration example are controlled by different input command signals.
- the operation timing needs to be shifted by TwZ2, as shown in FIG. 7, but the operation timing between the two pairs is particularly relevant. There is no need.
- the number of pairs of the combination weigher units is only different from that of the configuration example a, and the same effect as the combination weigher of the configuration example a is obtained.
- configuration example a a configuration having two combination weighing units (one combination weighing unit pair) is described, and in configuration example b, four combination weighing units (combination weighing unit pairs). Forces described for configurations with 2) Similarly, a configuration with an even number of 6 or more combination weighing units (3 or more pairs of combination weighing units) is also possible! /.
- FIG. 5 The combination scale (metering device) of the configuration example c of the second embodiment of the present invention is shown in FIG. 5 in which the configuration example a is shown! Hono 8a, 8b, 9a, 9b are configured to discharge the object to be weighed in the same direction (for example, directly below). Since the other configuration is the same as the configuration example a, the description thereof is omitted. Hereinafter, description will be made with reference to FIG. 5 (however, in this configuration example c, the lower chutes 10a and 10b are not provided as described above) In this configuration example c, the group A of the weighing hopper 4 and the memory hopper 5 is changed.
- the weighing scale unit and the second combination weighing unit including group B are operated at the same timing, and the objects to be weighed are discharged simultaneously from the four collecting hoppers 8a, 8b, 9a, 9b.
- the first and second combination weighers as in configuration example a, the first combination process, the second combination process, and the third combination process are performed at the same time. Determine two emission combinations.
- FIG. 10 is a timing chart showing the operation of the combination weigher of the configuration example c.
- Each combination weigher unit performs combination processing for simultaneously determining two sets of discharge combinations every Tw time, and from the combination hoppers 4 and 5 of the two sets of discharge combinations determined by the combination processing. At the same time, the objects to be weighed are discharged. In addition, the measured substances are discharged simultaneously from the inner shot collecting hopper (8a, 8b) and the outer chute collecting hopper (9a, 9b) at every Tw time. Since the operation of each combination weigher is the same as in the configuration example a, its detailed description is omitted.
- the same effects as the combination weigher of the configuration example a can be obtained, except that the operation timing and the discharge destination of the objects to be weighed in the combination weigher of the configuration example a and each combination weigher are different. .
- FIG. 11 (a) is a cross-sectional view showing a schematic configuration of a so-called vacuum type packaging machine
- FIG. 11 (b) is a schematic plan view of the packaging machine viewed from above.
- a funnel 51 is disposed below each of the four collecting hoppers 8a, 8b, 9a, 9b of the combination weigher.
- the funnel 51 is the packaging machine inlet.
- the opening of the packaging bag or packaging container that is manufactured or used by the packaging machine may be the packaging machine input port for the object to be weighed.
- the resin film drawn from the roll is sucked and heated in the molding unit 52, and four packaging containers 55 are sequentially molded at the same time.
- the resin film formed with the packaging container 55 is held by a conveying means such as a competitor (not shown) and is intermittently conveyed in the direction of the arrow 56.
- the combination weigher discharges the objects to be weighed simultaneously from the four collective hoppers 8a, 8b, 9a, 9b when the input command signal is input from the packaging machine. These objects to be weighed are put into the packaging container 55 through the respective funnels 51.
- the packaging machine When the packaging machine receives, for example, a discharge completion signal from the combination weigher and is ready to carry it, it carries the next four packaging containers 55 under the four funnels 51 and stops, and sends a loading command signal. Send to the combination weigher. In this way, the objects to be weighed are simultaneously fed into each of the four packaging containers 55 and conveyed to the lid seal part 53.
- the lid seal portion 53 a resin film is adhered to the upper surface of the packaging container 55 in order to cover the opening of the packaging container 55. Thereafter, for example, four or one packaging container 55 is cut at a cutting portion (not shown) arranged at the rear stage of the lid seal portion 53.
- sachet packaging containers for example, containers in which the packaging container 55 in FIG. 11 is separated and formed
- four collective hoppers 8a, 8b, 9a and 9b, and the combination weighing force is configured so that the objects to be weighed are put into the four packaging containers at the same time, and then the opening of each packaging container is covered with a resin film. Even a packaging line.
- a sorting and discharging device is constituted by the discharging hopper.
- one of the two collecting hoppers 13 is configured so that the objects to be weighed can be alternately discharged to the first discharging hopper and the second discharging hopper, and the other collecting hopper 13 is connected to the third discharging hopper 13. It is configured so that the objects to be weighed can be discharged alternately to the discharge hot bar and the fourth discharge hot bar, and when the objects to be weighed are loaded into the four discharge hobbies, the objects to be weighed from the four discharge hobbies to the packaging machine at the same time Configure to drain.
- a device in which the sorting and discharging device in the case of (2) above has a two-stage configuration may be considered.
- configuration (1) above four combination weighers are required, which increases equipment costs.
- configuration (2) two combination scales and an expensive sorting and discharging device are required, which increases the equipment cost.
- a more complicated and more expensive sorting / discharging device is required than in the case of the configuration (2), which increases the equipment cost.
- a double shift operation is performed, and in the case of the configuration of (4), a force shift operation is performed. Since only the chute 12 (Fig.
- the objects to be weighed discharged from the weighing hopper 4 selected as the previous combination on the collective chute 12 and the next combination are used.
- the distance from the object to be weighed discharged from the selected weighing hopper 4 is not sufficient, making high-speed operation difficult.
- the combination weigher of configuration example c suppresses an increase in equipment costs and enables high-speed operation regardless of the properties of most objects to be weighed.
- a configuration including three or more combination weighing units may be used in the same manner as the force described for the configuration including two combination weighing units.
- the combination weigher includes three combination weighers, for example, as shown in FIG. 4 (a)
- six collective hoppers 8a, 8b, 8c, 9a, 9b, and 9c are provided.
- the objects to be weighed are discharged.
- the packaging machine in this case, for example, a packaging machine as shown in FIG. 11, six packaging containers 55 are simultaneously formed and conveyed at the same time, and the objects to be weighed are put into the packaging containers 55 through the respective funnels 51.
- FIG. 11 six packaging containers 55 are simultaneously formed and conveyed at the same time, and the objects to be weighed are put into the packaging containers 55 through the respective funnels 51.
- the six collecting hoppers are not arranged in a straight line, so the six funnels 51 are deformed to form six packaging containers 55 arranged in a straight line. It is only necessary to guide the object to be measured.
- the upper receptacle of each funnel 51 is positioned below each assembly hot bar, and the lower pipe part of the funnel 51 is slightly lengthened so that the lower end of the pipe is located directly above each packaging container 55. If you use the funnel 51 made.
- the weighing hopper 4 and the memory hopper 5 that are arranged in a circle are divided into a plurality of groups, and one combination weigher corresponds to each of the plurality of groups.
- a combination scale arc-type combination scale
- the supply hopper 3, the weighing hopper 4 and the memory hopper 5 are arranged in a semicircular shape, and the linear feeder 2 is also arranged in accordance with the arrangement shape.
- the shape of the dispersion feeder 1 that supplies the objects to be weighed to the linear feeder 2 may be changed.
- a combination weigher of a semi-circular shape is configured from above.
- the combination weigher having the configuration in which the dispersion feeder 1 and the first combination weighing unit corresponding to the group A and the lower chute 10a are configured to perform the double shift operation or the triple shift operation.
- a fan-shaped combination weigher having a central angle of about 120 degrees when viewed from above is constructed.
- the objects to be weighed discharged from these fan-shaped combination weighers are fed into one packaging machine inlet through the lower chute 10a.
- the objects to be weighed in which the forces of the two collective hoppers 8a and 9a (see, for example, FIG. 1) of the first combination weigher unit are discharged without the lower chute 10a are different. You may comprise so that it may inject into one packaging machine inlet.
- the configuration for performing the double shift operation or the triple shift operation is configured to perform any one of the first, second, and third combination processes and operations described in the second embodiment.
- the objects to be weighed discharged from each of the two collecting hoppers 8a, 9a (for example, see Fig. 1) of the first combination weigher are separated into two different packaging machine inlets. You may comprise so that it may throw into.
- the combination weigher described above includes only a combination weigher corresponding to one group of combination hoppers 4 and 5 (for example, group A in FIG. 1, group A in FIG. 4, group A in FIG. 9, etc.).
- the supply hopper 3, the weighing hopper 4, and the memory hopper 5 are arranged in a circular arc shape with a central angle of approximately 180 degrees or less than 180 degrees.
- the necessary lower chute (10a, 10b, 10c, 10d) may be provided in the packaging machine.
- FIGS. 12 (a), 12 (b), and 12 (c) are plan views schematically showing a hopper such as a combination hopper in another example. 12 (a), (b), and (c), the inner chute 6X corresponds to, for example, the inner chute 6a, 6b, etc. of FIGS. 1 and 5, and the outer chute 7X corresponds to, for example, the outer chute of FIGS. Corresponds to chute 7a, 7b, etc.
- Each weighing hopper 4 in FIGS. 12 (a), 12 (b), and 12 (c) has one weight sensor 41 (see FIGS. 1 and 5).
- each weighing hopper 4 has two chambers (weighing chambers) 4a and 4b into which objects to be weighed are placed, and each weighing hopper 4 A memory hono 5 having two chambers (accommodating chambers) 5a and 5b corresponding to the measuring chambers 4a and 4b of the measuring hono 4 may be provided obliquely below.
- the two weighing chambers 4a, 4b of each weighing hono 4 are arranged in the same direction as the arrangement direction (rowing direction) of the plurality of weighing honos 4, and there are two storage chambers 5a, 5b of each memory hopper 5.
- the memory hoppers 5 are arranged side by side in substantially the same direction as the arrangement direction (row arrangement direction).
- the supply hopper 3 is configured to selectively discharge the object to be weighed to the weighing chamber 4a and the weighing chamber 4b of the weighing hopper 4.
- the weighing chamber 4a of the weighing hopper 4 is configured to selectively discharge the object to be measured to the storage chamber 5a of the memory hopper 5 and the outer chute 7X.
- the weighing chamber 4b of the weighing hopper 4 In this configuration, the objects to be weighed can be selectively discharged to the storage chamber 5b and the outer chute 7X.
- the two storage chambers 5a and 5b of the memory hopper 5 are configured so that the objects to be weighed can be selectively discharged to the inner chute 6X and the outer chute 7X, respectively.
- the combination calculation uses the weight (measurement value) of the weighing object in the weighing chambers 4a and 4b of each weighing hopper 4 and the weight (measurement value) of the weighing object in the storage chambers 5a and 5b of each memory hopper 5.
- the measurement chambers 4a and 4b and the storage chambers 5a and 5b are selected as discharge combinations.
- the weight sensor 41 measures the weight of the weighing object in the weighing chamber 4a when the weighing object is supplied only to one weighing chamber, for example, the weighing chamber 4a.
- the total weight of the objects to be weighed in the two weighing chambers 4a and 4b is weighed by the weight sensor 41.
- the total weight force of the objects to be weighed in these two weighing chambers 4a and 4b is obtained by subtracting the weight of the objects to be weighed in the weighing chamber 4a. Calculate the weight (measured value) of the object to be weighed.
- the measurement value of the object to be weighed in each of the storage chambers 5a and 5b the measurement value obtained by measurement and calculation in each measurement chamber 4a and 4b of the weighing hopper 4 above it is used.
- each measurement chamber 4a, 4b is selected as the discharge combination to be discharged to the inner chute 6X
- the corresponding storage chamber 5a, 5b is selected at the same time.
- the objects to be weighed in the weighing chamber 4a pass through the storage chamber 5a and are discharged onto the inner chute 6X.
- each weighing hopper 4 may have two measuring chambers 4a and 4b without providing the memory hopper 5.
- the two weighing chambers 4a, 4b of each weighing hono 4 are arranged side by side in substantially the same direction as the arrangement direction (rowing direction) of the plurality of weighing hoppers 4.
- the supply hopper 3 is configured to selectively discharge the object to be weighed into the weighing chamber 4a and the weighing chamber 4b of the weighing hopper 4, and the two weighing chambers 4a and 4b of the weighing hopper 4 are respectively disposed inside.
- the object to be weighed can be selectively discharged to the chute 6 X and the outer chute 7X.
- the combination calculation is performed using the weight (measurement value) of the objects to be weighed in the weighing chambers 4a and 4b of each weighing hopper 4, and each weighing chamber 4a and 4b is selected as the discharge combination.
- the method for calculating the weight of the objects to be weighed in each weighing chamber 4a, 4b is the same as in Fig. 12 (a).
- each memory hopper 5 may have two storage chambers 5a and 5b.
- the two storage chambers 5a and 5b of each memory hopper 5 are arranged side by side in substantially the same direction as the arrangement direction (row arrangement direction) of the plurality of memory hoppers 5.
- the supply hopper 3 (see FIGS. 1 and 5) for supplying an object to be weighed to the weighing hopper 4 is not shown.
- the weighing hopper 4 is configured so that the object to be weighed can be selectively discharged into the storage chamber 5a and the storage chamber 5b of the memory hopper 5, and is not discharged from the weighing hopper 4 onto the inner chute 6X and the outer chute 7X.
- the two storage chambers 5a and 5b of the memory hopper 5 are configured so that the objects to be weighed can be selectively discharged to the inner chute 6X and the outer chute 7X, respectively.
- the combination calculation is performed using, for example, the weights (measured values) of the objects to be weighed in the storage chambers 5a and 5b of each memory hopper 5, and the respective storage chambers 5a, 5b is selected as the discharge combination and weigh hopper 4 does not participate in the combination.
- the weight when weighed in the weighing hopper 4 thereabove is used as the weight of the objects to be weighed in each of the storage chambers 5a and 5b.
- each weighing hopper 4 and one of the storage chambers 5a and 5b of the corresponding memory hopper 5 are selected at the same time is valid, and the weighing hopper 4 can be included in the combination.
- the corresponding weighing hopper 4 and the storage chamber 5a of the memory hopper 5 are simultaneously selected as the discharge combination, the object to be weighed in the weighing hopper 4 passes through the storage chamber 5a and onto the inner chute 6X or the outer chute 7X. Discharged.
- the hopper configuration such as a combination hopper may be variously changed.
- the combination calculation is used for one weight sensor 41 attached to the weighing hopper 4. Two measured values are obtained.
- one weighing sensor 41 can be obtained for the combination calculation for one weight sensor 41.
- two weighing values for the combination sensor 41 are obtained for the quantity sensor 41, and in the configuration shown in FIG.
- control unit 20 includes a plurality of control devices that are not necessarily configured by a single control device. It is configured to control the operation of the combination weigher!
- the combination weigher and the weighing device according to the present invention are a packaging machine or twin type operated at high speed.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Supply Of Fluid Materials To The Packaging Location (AREA)
- Basic Packing Technique (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2629416A CA2629416C (en) | 2005-12-13 | 2006-12-08 | Combination weigher and weighing system using the same |
US12/097,232 US8115118B2 (en) | 2005-12-13 | 2006-12-08 | Combination weigher with memory hoppers that calculates a first and second optimum combinations for discharge into two different chutes |
CN2006800430959A CN101310167B (zh) | 2005-12-13 | 2006-12-08 | 组合秤以及使用组合秤的计量装置 |
AU2006324658A AU2006324658B2 (en) | 2005-12-13 | 2006-12-08 | Combination weigher and weighing system using the same |
EP06834304.5A EP1970682B1 (en) | 2005-12-13 | 2006-12-08 | Combination weigher and weighing system using the same |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005358515 | 2005-12-13 | ||
JP2005-358515 | 2005-12-13 | ||
JP2006-043524 | 2006-02-21 | ||
JP2006043524A JP4880321B2 (ja) | 2005-12-13 | 2006-02-21 | 組合せ秤及びそれを用いた計量装置 |
Publications (1)
Publication Number | Publication Date |
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WO2007069544A1 true WO2007069544A1 (ja) | 2007-06-21 |
Family
ID=38162852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2006/324549 WO2007069544A1 (ja) | 2005-12-13 | 2006-12-08 | 組合せ秤及びそれを用いた計量装置 |
Country Status (9)
Country | Link |
---|---|
US (1) | US8115118B2 (ja) |
EP (1) | EP1970682B1 (ja) |
JP (1) | JP4880321B2 (ja) |
CN (1) | CN101310167B (ja) |
AU (1) | AU2006324658B2 (ja) |
CA (1) | CA2629416C (ja) |
RU (1) | RU2387958C2 (ja) |
TW (1) | TW200736584A (ja) |
WO (1) | WO2007069544A1 (ja) |
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WO2009078171A1 (ja) * | 2007-12-18 | 2009-06-25 | Shozo Kawanishi | 組合せ秤 |
WO2013061374A1 (ja) * | 2011-10-27 | 2013-05-02 | 大和製衡株式会社 | 組合せ秤の被計量物集合排出装置及びこれを用いた組合せ秤 |
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JP2014126389A (ja) * | 2012-12-25 | 2014-07-07 | Yamato Scale Co Ltd | 集合シュートおよびこれを備えた組合せ秤 |
WO2018056321A1 (ja) * | 2016-09-21 | 2018-03-29 | 株式会社イシダ | 集合シュート及びそれを備えた組合せ計量装置 |
US10968057B2 (en) | 2016-09-21 | 2021-04-06 | Ishida Co., Ltd. | Collecting chute for combination weighing device with variable slope to reduce the variation in arrival time at the discharge end of the chute of articles discharged from different hoppers arranged at varrying distances apart |
EP3540386A4 (en) * | 2017-07-13 | 2020-02-26 | Yamato Scale Co., Ltd. | COMBINATION WEIGHING DEVICE |
US10837821B2 (en) | 2017-07-13 | 2020-11-17 | Yamato Scale Co., Ltd. | Combination weighing apparatus including small and large units including weighing hoppers |
Also Published As
Publication number | Publication date |
---|---|
CN101310167A (zh) | 2008-11-19 |
EP1970682A4 (en) | 2011-06-08 |
AU2006324658B2 (en) | 2010-06-10 |
RU2387958C2 (ru) | 2010-04-27 |
US20090294183A1 (en) | 2009-12-03 |
US8115118B2 (en) | 2012-02-14 |
TW200736584A (en) | 2007-10-01 |
JP4880321B2 (ja) | 2012-02-22 |
TWI304128B (ja) | 2008-12-11 |
CA2629416A1 (en) | 2008-06-21 |
AU2006324658A1 (en) | 2007-06-21 |
CA2629416C (en) | 2013-02-19 |
EP1970682A1 (en) | 2008-09-17 |
CN101310167B (zh) | 2010-12-01 |
EP1970682B1 (en) | 2015-09-16 |
RU2008128448A (ru) | 2010-01-20 |
JP2007187645A (ja) | 2007-07-26 |
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