JP2021021609A - Combination balance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To switch between a high-speed weighing mode capable of high-speed weighing and a reject mode capable of rejecting an excessive amount of objects to be weighed. When a high-speed weighing mode is selected by a setting operation unit, objects to be weighed from a weighing hopper 11 selected in an appropriate amount combination are alternately exchanged on first and second collective chutes 12 and 13 constituting two discharge paths. When the reject mode is selected, the object to be weighed from the weighing hopper 11 selected for the appropriate amount combination is discharged to one of the first and second collecting shoots 12, 13 and the other set. The excess object to be measured from the weighing hopper 11 to which the excess object to be measured is supplied to the chute 13 is collectively discharged in one place. [Selection diagram] Fig. 5

Description

The present invention relates to a combination scale that measures a predetermined amount of an object to be measured such as food.

Generally, in a combination scale, a large number of objects to be weighed are supplied to a dispersion feeder in the center of the upper part of the combination scale, and the objects to be weighed are oscillated outward by the dispersion feeder and arranged radially around the dispersion feeder. The linear feeder of the above vibrates and conveys the vibration to the outside, and supplies the vibration to the supply hoppers arranged corresponding to each linear feeder. The weight of the object to be weighed discharged from the supply hopper is weighed by the weighing hopper, and the combination calculation is performed based on the weight of the object to be weighed by the weighed hopper to obtain a predetermined weight range based on the target combination weight. An appropriate amount combination, which is a combination of hoppers, is selected, and the object to be weighed is discharged from the weighing hopper of the selected appropriate amount combination and put into the packaging machine via the collecting chute.

In the above-mentioned combination scale, if the object to be measured is, for example, an elongated object that is easily entangled or a substance that tends to stick to a large mass, vibration transfer by a distributed feeder or a linear feeder is sufficient. It is difficult to loosen, and the object to be weighed is excessively supplied to the weighing hopper.

The weighing hopper to which the excess object to be supplied is supplied in this way is difficult to be selected as an appropriate combination in the combination calculation, and substantially only the other weighing hoppers excluding the weighing hopper to which the excess object to be supplied are supplied. Since the combination calculation is performed, the weighing accuracy is lowered, the appropriate amount combination is difficult to be established, and the operating rate is lowered.

Therefore, in the weighing hopper to which an excessive amount of the object to be measured is supplied, the object to be measured is excluded to a route different from the normal route of the object to be discharged from the weighing hopper selected for the appropriate amount combination, so-called. Reject is done.

For example, in Patent Document 1 and Patent Document 2, the weighing hopper is provided with a pair of discharge gates for discharging the objects to be measured in the inward and outward directions, and the objects to be measured from the weighing hopper selected as an appropriate amount combination by the combination calculation. Opens the inner discharge gate to discharge the object to be weighed into the normal inner path, and the excess object to be weighed from the weighing hopper supplied with the excess object is discharged to the outside. The gate is opened so that the object to be measured is discharged to the outer reject path.

JP-A-2016-61716 US2010 / 0108404

However, in the above-mentioned Patent Document 1, since the discharged excess object to be measured is collected in the collection box installed on the outside of each measurement hopper, it is necessary to install a large number of collection boxes according to the number of measurement hoppers. At the same time, in order to return the collected objects to be weighed to the supply side of the items to be weighed and resupply them, it is necessary to manually carry a large number of collection boxes, which requires a great deal of labor and labor.

On the other hand, in Patent Document 2, the discharged excess object to be weighed is conveyed to a predetermined place by a rotary table installed outside a plurality of measuring hoppers arranged in an annular shape, and is conveyed from the predetermined place via a return conveyor. Since it is returned to the supply side of the object to be measured, the collected object to be measured can be easily and automatically resupplied. However, on the other hand, since the rotary table is installed on the outside of the plurality of measuring hoppers and the return conveyor is provided, there are problems that the size of the entire device is increased and the manufacturing cost is increased.

Further, in both Patent Document 1 and Patent Document 2, the outer gate provided in the measuring hopper is exclusively for discharging an excessive amount of the object to be measured, so that the object to be measured can be smoothly entangled or lumped. When weighing the object to be transported, the outer discharge gate and the reject path corresponding to the discharge gate are not used and are useless.

The present invention has been made in view of the above points, and has a high-speed weighing mode capable of high-speed weighing and a reject for eliminating an excessive amount of the object to be measured, depending on the type of the object to be measured. It is an object of the present invention to provide a combination scale that can be selected by switching between possible reject modes.

In order to achieve the above object, the present invention is configured as follows.

(1) The combination scale according to the present invention performs a combination calculation based on a plurality of measuring hoppers for weighing the supplied object to be weighed and the weight of the object to be measured supplied to the measuring hopper. It is a combination scale provided with a control unit that controls discharge to discharge the object to be weighed from the weighing hopper selected for the appropriate amount combination.
The measuring hopper can discharge the object to be measured to two different discharge paths under the control of the control unit.
The first set chute that constitutes one of the two discharge paths, and
A second collective chute that constitutes the other discharge path of the two discharge paths,
As the operation mode of the combination scale, a setting operation unit for selecting and setting a high-speed weighing mode and a reject mode capable of eliminating the excessive object to be weighed in the weighing hopper supplied with the excessive object to be weighed. Prepare,
The control unit controls the discharging operation of the measuring hopper according to the operation mode set in the setting operation unit.
In the high-speed operation mode, the control unit alternately discharges the object to be measured from the weighing hopper selected for the appropriate amount combination to both the first collecting chute and the second collecting chute, and rejects the object. In the mode, the object to be weighed is discharged from the weighing hopper selected for the appropriate amount combination to one of the two collecting chutes, and the overweighted object is discharged from the weighing hopper to which the excess object is supplied. The object is discharged to the other collective chute of the two collective chute.

According to the present invention, for example, in the case of weighing an object to be weighed so that it can be smoothly dispersed and conveyed and an excessive amount of the object to be weighed is not supplied to the weighing hopper, the high-speed weighing mode can be selected by the setting operation unit. The objects to be weighed from the weighing hopper selected for the appropriate amount combination can be alternately discharged to the first and second collecting chutes that form the two discharge paths, respectively, and the combination weighing can be performed at high speed.

Further, for example, in the case of weighing an object to be weighed in which entanglement or lumps are likely to occur and an excessive amount of the object to be weighed is likely to be supplied to the weighing hopper, the reject mode can be selected by the setting operation unit. The excess from the weighing hopper, which discharges the object to be weighed from the weighing hopper selected for the appropriate amount combination to one of the second collecting chutes, and supplies an excessive amount of the object to be measured to the other collecting chute. The objects to be weighed can be discharged in one place.

(2) In a preferred embodiment of the present invention, the plurality of measuring hoppers are arranged in an annular shape, and the measuring hopper has a pair of discharge gates that open and close independently.
One of the discharge gates of the pair of discharge gates opens inward toward the center of the ring to discharge the object to be measured to one of the two discharge paths, and the pair of discharge gates. The other discharge gate operates outwardly away from the center of the ring to discharge the object to be measured to the other discharge path of the two discharge paths.
The one collecting chute of the two collecting chutes is an inner collecting chute that guides the object to be discharged by the opening operation of the one discharge gate of the measuring hopper, and is the other of the two collecting chutes. The collecting chute guides the object to be discharged discharged by the opening operation of the other discharge gate of the measuring hopper downward, and is provided so as to surround the inner collecting chute from the outside. Is.

According to this embodiment, the discharge portions of the inner and outer collecting chutes can be arranged below the central portion of the plurality of measuring hoppers arranged in a ring shape, that is, below the central portion of the combination scale. In other words, it is possible to collect the devices within the planar area of the outer collective chute, and to obtain a high-performance combination scale that enables selective operation of high-speed weighing mode and reject mode without making the device particularly large. it can.

(3) In another embodiment of the present invention, the two collecting hoppers are provided at the lower ends of the two collecting chutes to store and discharge the objects to be measured discharged from the collecting chutes. ..

According to this embodiment, the timing of discharging the objects to be measured can be adjusted by the two collecting hoppers, and in the high-speed weighing mode, for example, the objects to be measured are alternately alternated from the two collecting hoppers to the input port of the common packaging machine. Can be put into.

(4) In still another embodiment of the present invention, in the reject mode, the collecting hopper at the lower end of the other collecting chute of both collecting chutes is replaced with a collecting means for collecting the excess object to be measured. Be done.

According to this embodiment, in the reject mode, the excessive object to be discharged in one place is removed by replacing the collecting hopper corresponding to the other collecting chute that guides the excessive object down. , It can be efficiently collected by the collection means.

(5) In one embodiment of the present invention, the collecting means discharges the excessive amount of the object to be measured from the other collecting chute of the two collecting chutes, and the excessive covering from the discharging chute. A collection container for storing the weight is provided.

According to this embodiment, an excessive amount of objects to be weighed discharged from a plurality of measuring hoppers can be collected in one collection container via the other collecting chute for rejection, so that only one collection container is installed. Often, the work of manually returning the collected object to be weighed to the supply side can be performed.

According to the present invention, a high-speed weighing mode and a reject mode can be selected by the setting operation unit according to the type of the object to be weighed, and in the high-speed weighing mode, the first and second discharge paths constituting the two discharge paths are formed. High-speed combination weighing can be performed by alternately discharging the objects to be weighed from the weighing hopper selected in the appropriate amount combination to the collecting chute, while in the reject mode, one of the first and second collecting chute The over-measured object from the weighing hopper selected for the appropriate amount combination can be discharged to the collecting chute, and the over-measured object from the weighing hopper supplied with the over-measured object to the other collecting chute. Can be discharged in one place.

Thereby, the combination scale can correspond to any operation mode of the high-speed weighing mode and the reject mode, and the combination scale having excellent functionality can be provided.

FIG. 1 is a perspective view of a combination scale according to an embodiment of the present invention. FIG. 2 is a front view of the combination scale of FIG. FIG. 3 is a perspective view of a main part of the collective chute of the combination scale of FIG. FIG. 4 is a vertical sectional front view showing a schematic configuration of the combination scale of FIG. 1 in the high-speed weighing mode. FIG. 5 is a vertical sectional front view showing a schematic configuration of the combination scale of FIG. 1 in the reject mode. FIG. 6 is a block diagram of the control system of the combination scale of FIG. FIG. 7 is a flowchart showing the entire processing of the combination scale. FIG. 8 is a flowchart showing the entire processing of the combination scale. FIG. 9 is a flowchart showing a process of controlling the measuring unit. FIG. 10 is a flowchart showing a process of controlling the discharge gate in the outward direction of the weighing hopper in the reject mode. FIG. 11 is a flowchart showing a process of controlling the discharge gate inward of the weighing hopper. FIG. 12 is a flowchart showing a process of controlling the discharge gate in the outward direction of the weighing hopper in the high-speed weighing mode. FIG. 13 is a vertical sectional front view showing a schematic configuration of the combination scale of another embodiment of the present invention in the reject mode.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a combination scale according to an embodiment of the present invention, FIG. 2 is a front view of the combination scale, and FIG. 3 is a perspective view showing a part of a collective chute of the combination scale. 4 and 5 are vertical sectional front views showing a schematic configuration of a combination scale.

The combination scale 1 of this embodiment is installed on the floor surface F, and the weighed object to be weighed is put into the packaging machine 2 installed below as shown in FIGS. 4 and 5 and packed in a bag. Used for lines, etc.

The combination scale 1 is provided with a base 3 that is installed and fixed to the floor surface F. The base 3 has a hollow structure in which the central portion is large and the base 3 is vertically opened through. A hollow center base 4 is supported above the base 3 via a plurality of legs 5. A dispersion feeder 7 is provided in the center of the upper surface of the center substrate 4 to radially disperse and convey the object to be measured, which is dropped and supplied by the supply conveyor 6 from above, and above the dispersion feeder 7, the supply conveyor 6 is provided. An input funnel 8 is provided to guide the object to be measured discharged from the end of the distribution feeder 7 to the center of the dispersion feeder 7.

On the upper surface of the center substrate 4, a plurality of linear feeders 9 that linearly convey the object to be dispersed and conveyed by the dispersion feeder 7 to the outside by vibration are provided radially surrounding the dispersion feeder 7. ing. Further, a supply hopper 10 that temporarily stores and discharges the objects to be measured from each linear feeder 9 on the outer peripheral wall of the center substrate 4, and the objects to be measured discharged from each supply hopper 10 are received, weighed, and discharged. It is equipped with a weighing hopper 11. The combination weighing and discharging of the object to be measured is performed by a large number of measuring units (for example, 18 stations) including the linear feeder 9, the supply hopper 10, and the measuring hopper 11.

Each measuring hopper 11 has an inner discharge gate 11a that can discharge the object to be measured to two different discharge paths and operates inwardly toward the center of the measuring hopper 11 arranged in an annular shape, and the center. It is provided with an outer discharge gate 11b that operates to open outward away from the vehicle. Further, below each measuring hopper 11, an inner collecting chute 12 constituting an discharging path for guiding the object to be discharged discharged by opening the inner discharging gate 11a toward the lower part of the center of the apparatus and an outer side. An outer collecting chute 13 that constitutes a discharge path that guides the object to be measured discharged by opening the discharge gate 11b downward of the central portion of the device is provided. Below each of the inner set chute 12 as the first set chute and the outer set chute 13 as the second set chute, two first and second sets that temporarily receive and store the set-guided object to be measured. Hoppers 14 and 15 are arranged in parallel.

The center substrate 4 has a discharge gate of each supply hopper 10, a drive unit for driving the discharge gates 11a and 11b of each measurement hopper 11, and a weight for detecting the weight of an object to be measured contained in each measurement hopper 11. It is equipped with a sensor 16, a control device described later for controlling each part, and the like.

As shown in FIG. 3, the inner and outer collective chute 12 and 13 are divided into a plurality of chute bodies 12a and 13a in the circumferential direction with a space for installing the leg portion 5, and the chute bodies 12a and 13a that flow down. It is provided with funnel portions 12b and 13b for collecting weighed objects, respectively. The shoot body 13a and the funnel portion 13b of the outer collective chute 13 are arranged so as to surround the shoot body 12a and the funnel portion 12b of the inner collective chute 12 from the outside, respectively.

The first and second set hoppers 14 and 15 are deployed facing the lower ends of the funnel portions 12b and 13b of the set chute 12 and 13.

The combination scale 1 of this embodiment is configured so that the high-speed weighing mode and the reject mode can be switched and selectively set as the operation mode by operating the operation setting display described later.

The high-speed weighing mode is selected, for example, when the object to be measured is smoothly supplied to the weighing hopper 11 and an excessive weighing hopper 11 is not generated, and therefore, a high-speed weighing process that does not require rejection is performed. Will be done.

The reject mode is selected when the object to be weighed is, for example, an elongated string, which tends to be entangled with each other to form a lump, and a weighing hopper 11 to which an excessive amount of the object to be measured is supplied is likely to occur.

When the high-speed weighing mode is selected as the operation mode, a plurality of weighing hoppers 11 having an appropriate amount combination in which the combined weight of the weights of the objects to be measured of the weighing hopper 11 is in a predetermined weight range are selected by the union calculation described later. Each time, the inner discharge gate 11a and the outer discharge gate 11b of the measuring hopper 11 are alternately opened and operated.

Therefore, when a plurality of weighing hoppers 11 of an appropriate amount combination are selected by the combination calculation, the objects to be weighed by the selected plurality of weighing hoppers are, for example, by the opening operation of the inner discharge gate 11a, so that the inner collecting chute 12 Is discharged to. When a plurality of weighing hoppers 11 having an appropriate amount combination are selected by the following combination calculation, the objects to be weighed by the selected weighing hoppers are discharged to the outer collecting chute 13 by the opening operation of the outer discharging gate 11b. Will be done. Further, when a plurality of weighing hoppers 11 of an appropriate amount combination are selected by the following combination calculation, the objects to be weighed by the selected plurality of weighing hoppers are set on the inner collecting chute 12 by the opening operation of the inner discharge gate 11a. Is discharged to.

In the same manner below, each time a plurality of weighing hoppers 11 of an appropriate amount combination are selected by the combination calculation, the objects to be measured from the selected plurality of weighing hoppers 11 are the inner collecting chute 12 and the outer gathering chute 13. And are discharged alternately.

Therefore, the objects to be weighed w of the plurality of measuring hoppers 11 selected for the appropriate amount combination alternate with the first and second collecting hoppers 14 and 15 via the inner and outer gathering chutes 12 and 13 as shown in FIG. Is discharged to the wrapping machine 2 alternately from the first and second collecting hoppers 14 and 15.

When the reject mode is selected as the operation mode, as shown in FIG. 5, the second collective hopper 15 corresponding to the outer collective chute 13 is removed, a separately prepared discharge chute 17 is attached, and the discharge chute 17 is attached. A collection container 18 for collecting the rejected object w to be measured is arranged at the discharge end of 17.

In this reject mode, when a plurality of weighing hoppers 11 having an appropriate amount combination in which the combined weight of the objects to be weighed of the weighing hopper 11 is combined is selected by the union calculation, the inside of the weighing hopper 11 is discharged. The gate 11a is opened and the object to be weighed w is discharged to the inner collecting chute 12. Further, when the amount of the object to be weighed supplied to the measuring hopper 11 is an excess amount exceeding the threshold weight, the discharge gate 11b on the outside of the measuring hopper 11 is opened to open the excessive amount of the object to be measured w. It is discharged to the collective chute 13.

Therefore, in the reject mode, the objects w of the plurality of weighing hoppers 11 selected for the appropriate amount combination are discharged to the first collecting hopper 14 via the inner collecting chute 12 as shown in FIG. 1 While the object w of the measuring hopper 11 is charged from the collecting hopper 14 to the packaging machine 2, the object w to be measured of the measuring hopper 11 is charged into the collection container 18 via the outer collecting chute 13 and the discharge chute 17 and collected. The object to be weighed w collected in the collection container 18 is returned to the starting end of the supply conveyor 6 by hand in a timely manner.

Next, the configuration and operation of the control system of this combination scale will be described based on the flowchart.

FIG. 6 is a block diagram showing a schematic configuration of a control system of the combination scale of this embodiment, and the same reference numerals are given to the parts corresponding to FIGS. 1 to 5 above.

The combination scale 1 of this embodiment includes a control device 21, which includes a control unit 22, a memory unit 23, an A / D conversion circuit unit 24, a gate drive circuit unit 25, and vibration. It includes a control circuit unit 26 and an I / O circuit unit 27 connected to the packaging machine 2.

The control unit 22 controls each unit and performs combination operations and the like. The memory unit 23 stores the operation program of the combination scale, the operation parameters to be set, and the like, and serves as a work area for calculation and the like of the control unit 22.

The A / D conversion circuit unit 24 converts an analog signal from each weight sensor 16 that detects the weight of the object to be weighed by each weighing hopper 11 into a digital signal and outputs the analog signal to the control unit 22. Further, the control unit 22 is given a discharge command signal from the packaging machine 2 via the I / O circuit unit 27, while the control unit 22 gives a discharge completion signal to the packaging machine 2 via the I / O circuit unit 27. give.

The gate drive circuit unit 25 includes the discharge gate of the supply hopper 10, the discharge gates 11a and 11b of the measuring hopper 11, and the discharge gates of the first and second assembly hoppers 14 and 15 based on the control signal from the control unit 22. Control the opening and closing of. The vibration control circuit unit 26 controls the vibration operation of the distributed feeder 7 and each linear feeder 9 based on the control signal from the control unit 22. Further, the control unit 22 is connected so as to be able to communicate with the operation setting display 28 as the setting operation unit for setting and displaying the operation mode and the operation parameters.

The control device 21 controls the operation of the entire combination scale by the control unit 22 executing the operation program stored in the memory unit 23.

7 and 8 are flowcharts showing the overall processing of the combination scale 1.

As shown in FIG. 7, it is determined whether or not the operation switch is turned on and the operation is started (step S1), and when the operation is not started, the operation setting display 28 is operated to enter the operation mode. It is determined whether or not the switching is set (step S2), and when the operation mode switching is set, an instruction for changing the combination scale and its peripheral device is displayed according to the set operation mode. The weighing system is displayed and the process returns to step S1 (step S3).

In this weighing system display, for example, when the operation mode is switched to the reject mode, the weight of the object to be weighed supplied to the weighing hopper 11 is the threshold weight for determining the excess weight. A display prompting for setting input, an instruction to replace the second assembly hopper 15 on the reject side with a discharge chute 17, and an instruction to install a collection container 18 at the discharge end of the discharge chute 17 in order to receive the rejected object to be measured. Etc. are displayed. Further, as the operation mode, for example, when the operation mode is switched to the high-speed weighing mode, an instruction to return the eject chute 17 on the reject side to the original second assembly hopper 15 is displayed.

When the operation is started in step S1 described above, the distributed unit that controls the distributed unit including the distributed feeder 7 and the linear feeder 9 is controlled, and the process proceeds to step S5 (step S4). In this dispersion control, the discharge gate is opened and closed to discharge the object to be measured, and the linear feeder 9 corresponding to the emptied supply hopper 10 is driven, and further, the dispersion feeder 7 is driven to cover the linear feeder 9. Supply the weight.

In step S5, the discharge gate of the supply hopper 10 is controlled, the discharge gate of the supply hopper 10 corresponding to the empty measuring hopper 11 is opened, and the supply hopper control for supplying the object to be measured to the empty measuring hopper 11 is performed. Then, the process proceeds to step S6.

In step S6, the weight of the weighing hopper 11 to which the object to be measured is supplied is weighed by the weight sensor 16, the weighing unit for capturing the weight value is controlled, and the process proceeds to step S7. The control of the measuring unit will be described later.

In step S7, it is determined whether or not the operation mode is the reject mode, and when it is in the reject mode, it is determined whether or not there is a weighing hopper 11 to which an excessive amount of objects to be measured is supplied (step S8). When there is a weighing hopper 11 to which an excessive amount of the object to be weighed is supplied, the weighing hopper that discharges the excessive object from the weighing hopper 11 in the outward direction in order to discharge the excessive object to the outer collecting chute 13 which is a reject path. The measurement hopper outward discharge gate control, which is a control for opening the discharge gate 11b outside the 11 (step S9), is performed. The outside discharge gate control of the weighing hopper in this reject mode will be described later.

Further, in step S8, when there is no weighing hopper 11 to which an excessive amount of the object to be measured is supplied, the combination calculation is performed and the process proceeds to step S11 (step S10). In the combination calculation, the combination weight obtained by combining the weights of the objects to be measured of each measurement hopper 11 is a measurement in a predetermined weight range equal to or heavier than the target combination weight and closest to the target combination weight. Search for an appropriate amount combination that is a combination of the hopper 11.

In step S11, it is determined whether or not there is an appropriate amount combination of the measuring hopper 11, and when there is an appropriate amount combination, it is determined whether or not there is a discharge command signal from the packaging machine 2 (step S12). When there is a discharge command signal, the discharge gate inside the measuring hopper 11 discharges inward in order to discharge the object to be measured from the measuring hopper 11 of the appropriate amount combination to the inner collecting chute 12 which is a normal route. The inward discharge gate control of the weighing hopper, which is the control for opening 11a, is performed, and the process returns to step S1 (step S13). The inward discharge gate control of the measuring hopper in this reject mode will be described later.

In step S11, when there is no appropriate amount combination of the measuring hopper 11, and in step S12, when there is no discharge command signal from the packaging machine 2, the process returns to step S1.

In step S7, when the operation mode is not the reject mode, that is, the high-speed weighing mode, the process proceeds to step S14 of FIG. 8, and in the high-speed weighing mode, the weighing hopper 11 in an appropriate amount combination to the inner collecting chute 12 is to be weighed. It is determined whether or not the inward combination presence flag indicating that the is discharged is ON.

When the inward combination flag is ON, it is determined whether or not there is a discharge command signal from the packaging machine 2 (step S15). When there is a discharge command signal, it is a control to open the discharge gate 11a inside the measuring hopper 11 to discharge inward in order to discharge the object to be measured from the measuring hopper 11 of the appropriate amount combination to the inner collecting chute 12. The inward discharge gate of the weighing hopper is controlled (step S16), the inward combination presence flag is turned off, and the process returns to step S1 of FIG. 7 (step S17). The inward discharge gate control of the weighing hopper in this high-speed weighing mode will be described later. If there is no discharge command signal from the packaging machine 2 in step S15, the process returns to step S1.

In step S14, when the inward combination flag is not turned on, the outward combination flag indicating that the object to be measured is discharged from the weighing hopper 11 having an appropriate amount combination to the outer collecting chute 13 is set in the high-speed weighing mode. It is determined whether or not it is ON (step S18), and when the outward combination presence flag is ON, it is determined whether or not there is a discharge command signal from the packaging machine 2 (step S19). When there is a discharge command signal, it is controlled to open the discharge gate 11b on the outside of the measuring hopper 11 to discharge outward in order to discharge the object to be measured from the measuring hopper 11 of the appropriate amount combination to the outer collecting chute 13. A certain weighing hopper outward discharge gate control is performed (step S20), the flag with the outward combination is turned off, and the process returns to step S1 (step S21). The outside discharge gate control of the weighing hopper in this high-speed weighing mode will be described later. If there is no discharge command signal from the packaging machine 2 in step S19, the process returns to step S1.

In step S18, when the outward combination presence flag is not ON, the combination calculation is performed (step S22) to determine whether or not there is an appropriate amount combination of the weighing hopper 11 (step S23), and when there is an appropriate amount combination, It is determined whether or not the above-mentioned inward combination presence flag indicating that the object to be measured is discharged from the measurement hopper 11 having an appropriate amount combination to the inner assembly chute 12 is ON (step S24), and the inward combination presence flag is set. When it is not ON, the inward combination flag is turned ON and the process returns to step S1 (step S25).

In step S24, when the inward combination flag is ON, is the outer combination flag ON indicating that the object to be measured is discharged from the weighing hopper 11 having an appropriate amount combination to the outer collecting chute 13. It is determined whether or not the flag is present (step S26), and when the flag with the outward combination is not turned ON, the flag with the outward combination is turned ON and the process returns to step S1 (step S27). In step S23, when there is no appropriate amount combination, and in step S26, when the flag with outward combination is ON, the process returns to step S1 in FIG. 7, respectively.

FIG. 9 is a flowchart showing the process of the measuring unit control (step S6) of FIG. 7.

First, the initial value "1" is set as the number k of the weighing hoppers for identifying each of the plurality of weighing hoppers 11 (step S61), and the stabilization time until the weighing value of the weighing hopper k stabilizes is being measured. It is determined whether or not the measurement stabilization flag indicating the presence is ON (step S62), and when the measurement stabilization flag is ON, the measured value of the measurement stability timer for measuring the stability time of the measurement hopper k. Is decremented by one (step S63), and it is determined whether or not the measurement stabilization timer of the measurement hopper k has timed up, that is, whether or not the stabilization time has elapsed (step S64). The process of FIG. 9 is executed at regular time intervals, and the stabilization time is measured by subtracting one of the measurement values of the measurement stabilization timer.

When the measurement stabilization timer of the measurement hopper k timed up in step S64, the measurement of the stabilization time of the measurement hopper k was completed, so the measurement stabilization flag was turned off (step S65), and the measurement value Wk of the measurement hopper k was set. Since the uptake (step S66) and the weighing of the weighing hopper k are completed, the weighing completion flag is turned ON and the process proceeds to step S68 (step S67).

In step S68, it is determined whether or not the operation mode is the reject mode, and when it is in the reject mode, the weighing value Wk of the weighing hopper k is the threshold weight for determining whether or not it is excessive. It is determined whether or not the weight value is equal to or greater than the overweight discrimination weight value (step S69), and when the weighing value Wk of the weighing hopper k is equal to or greater than the overweight discrimination weight value, it is necessary to reject the object to be weighed. The reject flag is set (step S70), and the process proceeds to step S71.

In step S71, the number k of the weighing hopper is incremented, and it is determined whether or not k is larger than the number of weighing hoppers (step S72). If it is not large, the process returns to step S62, and if k is larger than the number of weighing hoppers. , Assuming that the processing for all the weighing hoppers 11 is completed, the process proceeds to the next step.

When the measurement stabilization timer of the measurement hopper k is not timed up in step S62, when the operation mode is not the reject mode in step S64, and in step S69, the measurement value Wk of the measurement hopper k is determined to be excessive. If it is not equal to or greater than the weight value, the process proceeds to step S71.

In step S62, when the measurement stabilization flag of the measurement hopper k is not ON, the stabilization time is not being measured, so the measurement hopper k determines whether or not the measurement completion flag is ON (step S73). When the weighing completion flag of the weighing hopper k is ON, the process proceeds to step S71, and when the weighing completion flag of the weighing hopper k is not ON, it is determined whether or not the object to be weighed is input from the supply hopper 10. (Step S74), when there is an input of the object to be measured, the measurement stabilization flag of the measurement hopper k is turned on (step S75), the measurement stability timer of the measurement hopper k is set, and the measurement of the stabilization time is started (step S74). Step S76) and step S71.

Next, in step S9 of FIG. 7, a process for discharging the excess object to be measured from the weighing hopper 11 to which the excess object is supplied to the outer collecting chute 13 which is the reject path, that is, the above-mentioned reject mode. The outward discharge gate control of the measuring hopper in the above will be described in detail with reference to FIG.

First, the initial value "1" is set as the number k of the weighing hoppers for identifying each of the plurality of weighing hoppers 11 (step S91), and the reject flag indicating that the object to be measured should be rejected is set to the weighing hopper k. It is determined whether or not it is set (step S92), and if the reject flag is not set, the process proceeds to step S96, and if the reject flag is set, the outward discharge gate opening of the weighing hopper k is set. , The outer discharge gate 11b is opened to discharge an excessive amount of the object to be measured to the outer collecting chute 13 (step S93), the measurement completion flag of the measurement hopper k is turned off (step S94), and the object to be measured is released. The process proceeds to step S96 by turning on the object to be loaded command flag indicating that the object to be measured should be charged from the supply hopper k corresponding to the discharged and emptied weighing hopper k to the measuring hopper k (step S95).

In step S96, the number k of the weighing hopper is incremented, and it is determined whether or not k is larger than the number of weighing hoppers (step S97). If it is not large, the process returns to step S92, and if k is larger than the number of weighing hoppers. , Assuming that the processing for all the weighing hoppers 11 is completed, the process proceeds to the next step.

FIG. 11 is a flowchart showing the process of controlling the discharge gate inward of the measuring hopper in step S13 of FIG. 7 and step S16 of FIG. The process of controlling the discharge gate inward of the measuring hopper discharges the object to be measured of the measuring hopper 11 having an appropriate amount combination to the inner collecting chute 12, and is the same for the reject mode and the high-speed weighing mode.

First, the initial value "1" is set as the number k of the weighing hoppers for identifying each of the plurality of weighing hoppers 11 (step S131), and the weighing hopper k discharges the object to be measured to the inner collecting chute 12. It is determined whether or not the combination is selected as an inward combination, that is, an appropriate amount combination (step S132). If it is not selected for the inward combination, the process proceeds to step S136, and if it is selected for the inward combination, the inward discharge gate opening of the measuring hopper k is set, and the inner discharge gate 11a is opened to operate. The object to be measured is discharged to the inner collecting chute 12 (step S133), the measurement completion flag of the measurement hopper k is turned off (step S134), the object to be measured is discharged, and the supply corresponding to the empty measurement hopper k is supplied. The measurement object charging command flag indicating that the object to be measured should be charged from the hopper k to the weighing hopper k is turned ON, and the process proceeds to step S136 (step S135).

In step S136, the number k of the weighing hopper is incremented, and it is determined whether or not k is larger than the number of weighing hoppers (step S137). If it is not large, the process returns to step S132, and if k is larger than the number of weighing hoppers. , Assuming that the processing for all the weighing hoppers 11 is completed, the process proceeds to the next step.

FIG. 12 is a flowchart showing a process of controlling the outside discharge gate of the weighing hopper in the high-speed weighing mode of step S20 of FIG.

First, the initial value "1" is set as the number k of the weighing hoppers for identifying each of the plurality of weighing hoppers 11 (step S201), and the weighing hopper k discharges the object to be measured to the outer collecting chute 13. It is determined whether or not it is selected as an outward combination, that is, an appropriate amount combination (step S202), and if it is not selected as an outward combination, the process proceeds to step S206, and if it is selected as an outward combination, a weighing hopper is used. The outward discharge gate opening of k is set, the outer discharge gate 11b is opened, the object to be measured is discharged to the outer collecting chute 13 (step S203), and the weighing completion flag of the weighing hopper k is turned off. (Step S204) Turn on the object to be input command flag indicating that the object to be measured should be input from the supply hopper k corresponding to the emptied weighing hopper k to the measuring hopper k after discharging the object to be measured. The process proceeds to step S206 (step S205).

In step S206, the number k of the weighing hopper is incremented, and it is determined whether or not k is larger than the number of weighing hoppers (step S207). If it is not large, the process returns to step S202, and if k is larger than the number of weighing hoppers. , Assuming that the processing for all the weighing hoppers 11 is completed, the process proceeds to the next step.

As described above, according to the present embodiment, the high-speed weighing mode and the reject mode can be selected and set by operating the operation setting display 28. In the high-speed weighing mode, the internal and external double collective shoots 12 and 13 are used. By alternately discharging the objects to be weighed from the weighing hopper 11 selected for the appropriate amount combination, high-speed combination weighing can be performed.

Further, in the reject mode, the weighing hopper is discharged from the weighing hopper 11 selected for the appropriate amount combination to the inner collecting chute 12, while the measuring hopper is supplied with an excessive amount of the weighing object to the outer collecting chute 13. The excess amount of objects to be weighed from No. 11 can be collectively discharged in one place.

Therefore, the combination scale 1 can be used in both the high-speed weighing mode and the reject mode, and has excellent functionality.
[Other Embodiments]
The present invention can also be carried out in the following forms.

(1) When there is no possibility that an excessive amount of the object to be measured is supplied to the measuring hopper 11 and particularly high-speed processing is not required, only one of the inner discharge gate 11a or the outer discharge gate 11b is required. A standard operation mode is set in which the discharge gate is controlled to discharge the object to be measured from the weighing hopper 11 selected for the appropriate amount combination to only one of the inner collecting chute 12 or the outer collecting chute 13. Then, a desired operation mode may be selected from the high-speed weighing operation mode, the reject operation mode, and the standard operation mode.

(2) In the above embodiment, in the reject mode, the excessively measured object is discharged to the outer collecting chute 13 by opening the outer discharge gate 11b, but the excessively measured object is discharged to the inner side. The gate 11a may be opened and discharged to the inner collecting chute 12.

(3) As shown in FIG. 13, an excessive amount of objects to be measured that have flowed down and collected and discharged by the collecting chute 13 are conveyed to the start end of the supply conveyor 6 by the lift conveyor 19 and automatically returned. May be good.

In this case, the object to be weighed can be conveyed to the start end of the lift conveyor 19 without using power, and the recovered object can be returned to the start end of the supply conveyor 6 with a relatively simple structure.

11 Weighing hopper 11a Discharge gate 11b Discharge gate 12 Inner gathering chute 13 Outer gathering chute 14 1st gathering hopper 15 2nd gathering hopper 17 Discharge chute 18 Collection container 22 Control unit 28 Operation setting indicator w Measured object

Claims (5)

From a plurality of weighing hoppers for weighing the supplied object to be weighed and a weighing hopper selected for an appropriate amount combination by performing a combination calculation based on the weight of the object to be measured supplied to the weighing hopper. A combination scale provided with a control unit that controls discharge to discharge the object to be measured.
The measuring hopper can discharge the object to be measured to two different discharge paths under the control of the control unit.
The first set chute that constitutes one of the two discharge paths, and
A second collective chute that constitutes the other discharge path of the two discharge paths,
As the operation mode of the combination scale, a setting operation unit for selecting and setting a high-speed weighing mode and a reject mode capable of eliminating the excessive object to be weighed in the weighing hopper supplied with the excessive object to be weighed. Prepare,
The control unit controls the discharge operation of the measuring hopper according to the operation mode set in the setting operation unit.
In the high-speed operation mode, the control unit alternately discharges the object to be measured from the weighing hopper selected for the appropriate amount combination to both the first collecting chute and the second collecting chute, and rejects the object. In the mode, the object to be weighed is discharged from the weighing hopper selected for the appropriate amount combination to one of the two collecting chutes, and the overweighted object is discharged from the weighing hopper to which the excess object is supplied. Discharge the object to the other collective chute of the two collective chute.
A combination scale characterized by that. The plurality of weighing hoppers are arranged in an annular shape, and the weighing hopper has a pair of discharge gates that open and close independently.
One of the discharge gates of the pair of discharge gates opens inward toward the center of the ring to discharge the object to be measured to one of the two discharge paths, and the pair of discharge gates. The other discharge gate operates outwardly away from the center of the ring to discharge the object to be measured to the other discharge path of the two discharge paths.
The one collecting chute of the two collecting chutes is an inner collecting chute that guides the object to be discharged by the opening operation of the one discharge gate of the measuring hopper, and is the other of the two collecting chutes. The collecting chute guides the object to be discharged discharged by the opening operation of the other discharge gate of the measuring hopper downward, and is provided so as to surround the inner collecting chute from the outside. Is,
The combination scale according to claim 1. It is provided with two collecting hoppers, which are arranged at the lower ends of both collecting chutes and store and discharge the objects to be measured discharged from each collecting chutes.
The combination scale according to claim 1 or 2. In the reject mode, the collecting hopper at the lower end of the other collecting chute of both collecting chutes is replaced with a collecting means for collecting the excess object to be measured.
The combination scale according to claim 3. The collection means includes a discharge chute that discharges the excess object to be measured from the other collection chute of both collection chute, and a collection container that stores the excess object to be measured from the discharge chute.
The combination scale according to claim 4.

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