JP2019002705A - Automatic weighing combination device and automatic weighing combination method - Google Patents

Abstract

To suppress deterioration of processing efficiency of a device even when a weighing object does not fall within an allowable range of weights when performing the automatic weighing combination.SOLUTION: An automatic weighing combination apparatus according to one embodiment, includes: an entrance side weighing unit; a plurality of turning hoppers capable of receiving, for each group, weighing objects measured by the entrance side weighing unit; a plurality of fixed hoppers capable of receiving the weighing objects from the plurality of turning hoppers and capable of forming an aggregate of the weighing objects with weights falling within an allowable range of weights by receiving the weighing objects over a plurality of times; a returning unit for receiving the weighing objects not supplied to the plurality of fixed hoppers from the plurality of turning hoppers and returning the weighing objects to a weighing object supply unit; and a control unit for selectively supplying the weighing objects accommodated in the turning hoppers to the plurality of fixed hoppers or the returning unit on the basis of measured weight values of the weighing objects measured by the entrance side weighing unit.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to an automatic weighing and combining apparatus and an automatic weighing and combining method capable of combining objects to be measured to obtain a desired weight.

The automatic weighing / combining apparatus measures the weights of a plurality of weighing objects having different weights, and selects and combines the weighing objects so that the total weight falls within an allowable range from the measured weighing objects.
For example, an automatic weighing and combining device disclosed in Patent Document 1 includes a weighing conveyor that measures the weight of a weighing object that is intermittently supplied, and a plurality of swivel hoppers that receive the weighing object whose weight is measured by the weighing conveyor. A plurality of fixed hoppers that form and collect a collection of weighing objects whose weight is within an allowable range by receiving the weighing objects from these swivel hoppers a plurality of times, and receiving weighing objects that are not delivered to the fixed hopper A return hopper.

JP 2013-250232 A

  Patent Document 1 does not disclose a means for suppressing a reduction in processing efficiency of the apparatus when a large number of aggregates of weighing objects that are returned to the return hopper without having an allowable weight are generated.

  In view of the above-described problems, an object according to an embodiment is to make it possible to suppress a reduction in processing efficiency of an apparatus even when an object to be measured that does not fall within an allowable weight occurs when performing automatic weighing combination. is there.

(1) An automatic weighing and combining apparatus according to an embodiment includes:
An inlet-side weighing unit capable of measuring the weight of the weighing object that is divided into a plurality of groups and intermittently supplied from the weighing object supply unit;
A plurality of swivel hoppers arranged in a circumferential direction around a rotating shaft and capable of receiving the weighing object whose weight is measured by the inlet-side weighing unit while swiveling around the rotating shaft;
A plurality of fixed hoppers capable of receiving the weighing objects from the plurality of swiveling hoppers, and forming the aggregate of the weighing objects having an allowable weight by receiving the weighing objects a plurality of times. A plurality of fixed hoppers that are capable of discharging the aggregate of received weighing objects;
A return unit for receiving the measurement object that is not supplied to the plurality of fixed hoppers from the plurality of swivel hoppers and returning the measurement object to the measurement object supply unit;
Based on the measured value of the weight of the measurement object measured by the inlet-side measurement unit, the measurement object accommodated in the swivel hopper is selectively supplied to the plurality of fixed hoppers or the return unit. A control unit of
With
The controller is
A fixed hopper capable of forming an aggregate of the weighing objects having a weight within the allowable range is selected from the plurality of fixed hoppers, and the aggregate of the weighing objects is supplied to the selected fixed hopper. Composed of
And when the ratio of the said measurement object discharged | emitted by the said return part becomes more than a 1st threshold value, it is comprised so that the turning speed of these turning hoppers may be increased.

According to the configuration of the above (1), by supplying a set of objects to be weighed within the allowable range to the fixed hopper selected by the control unit, the set of allowable weights (hereinafter referred to as “pass”). Product ") can be formed. By discharging this assembly from the fixed hopper, an assembly having an allowable weight can be obtained.
In addition, by discharging the weighing object that is not supplied to the fixed hopper from the swivel hopper to the return part, a measure for removing the weighing object that has accumulated in the swirl hopper becomes unnecessary, and continuous operation without stopping the device Is possible.
In addition, when the ratio of the weighing object discharged to the return unit becomes equal to or higher than the first threshold, the control unit increases the turning speed of the turning hopper, thereby reducing the amount of the weighing object to be charged into the fixed hopper. It is possible to increase, and a decrease in processing efficiency of the apparatus can be suppressed.

(2) In one embodiment, in the configuration of (1),
The controller is
When the ratio of the weighing object discharged to the return unit is equal to or greater than a first threshold, the turning speed of the plurality of turning hoppers is increased and the weighing object supplied to the plurality of turning hoppers is increased. It is configured not to change the supply amount.
According to the configuration of (2) above, the percentage of acceptable products can be increased, and the percentage of weighing objects discharged to the return portion can be reduced.

(3) In one embodiment, in the configuration of (1),
The controller is
When the ratio of the weighing object discharged to the return portion becomes less than a second threshold, the turning speed of the plurality of turning hoppers is reduced.
According to the configuration of the above (3), when the ratio of the aggregates of the weighing objects discharged to the return portion becomes less than the second threshold, the swivel speed of the swivel hopper is reduced so that it passes per unit time. The apparatus can be stably operated while ensuring the number of products.

(4) In one embodiment, in any one of the configurations (1) to (3),
The controller is
The upper limit value of the allowable range is increased when the ratio of the weighing object discharged to the return unit becomes equal to or greater than a third threshold value.
According to the configuration of (4) above, when the ratio of the weighing object discharged to the return unit becomes equal to or greater than the third threshold value, the allowable range of the weighing object weight supplied to the fixed hopper by the control unit is reached. By increasing the upper limit value, it is possible to suppress a decrease in yield of acceptable products, thereby suppressing a decrease in processing efficiency of the apparatus.
In addition, when the yield of acceptable products declines, the upper limit value is increased without changing the lower limit value of the allowable range weight. The risk of occurrence is also eliminated.

(5) In one embodiment, in any one of the configurations (1) to (4),
The controller is
When the ratio of the weighing object discharged to the return unit becomes less than a fourth threshold value, the upper limit value of the weight in the allowable range is reduced.
According to the configuration of (5) above, when the ratio of the aggregates of the weighing objects discharged to the return portion becomes less than the fifth threshold, the upper limit value of the weight in the allowable range is reduced, thereby the weighing object. The measurement accuracy of the assembly can be brought close to the initial allowable range.

(6) In one embodiment, in any one of the configurations (1) to (5),
The third threshold is greater than the first threshold.
In the configuration of (6) above, when the ratio of the aggregates of the weighing objects discharged to the return portion increases and exceeds the first threshold value, by increasing the turning speed of the plurality of turning hoppers, Reduction in processing efficiency can be suppressed.
Next, when the ratio of the aggregates of the weighing objects discharged to the return part further increases and becomes equal to or higher than the third threshold value, the upper limit value of the weight in the allowable range is increased.
In this way, by performing the two-stage control as the ratio of returned products increases, it is possible to suppress a decrease in processing efficiency of the apparatus without producing defective products. Further, even in the process of reducing the ratio of returned products, the same two-stage control can be performed, so that the number of acceptable products can be ensured while maintaining the measurement accuracy of the collection of measurement objects.

(7) The automatic weighing combination method according to one embodiment is as follows:
An inlet-side weighing step for measuring the weight of a plurality of weighing objects which are divided into a plurality of groups and intermittently supplied from the weighing object supply unit;
A plurality of swivel hoppers arranged in a circumferential direction around a rotating shaft, and a weighing unit that receives the weighing object whose weight has been measured in the inlet-side weighing step for each group while swiveling the swivel hoppers Preparation steps,
Preparing a plurality of fixed hoppers for receiving the weighing object from the plurality of swivel hoppers, and receiving the weighing object for a plurality of times from the plurality of swivel hoppers of the plurality of fixed hoppers. A selection step of selecting the fixed hopper capable of forming an assembly of the weighing objects to be weighted;
A metering and discharging step of supplying the aggregate of the objects to be weighed having a weight within the allowable range to the selected fixed hopper and discharging the aggregate from the fixed hopper;
A step of discharging the weighing object that is not delivered from the plurality of swiveling hoppers to the plurality of fixed hoppers and returning the weighing object to the weighing object supply unit;
A turning speed increasing step for increasing the turning speed of the plurality of turning hoppers when the ratio of the weighing object returned to the weighing object supply unit in the returning step is equal to or greater than a first threshold;
Is provided.

According to the method of (7) above, in the selection step, a set of objects to be weighed with a weight within the allowable range is supplied to the selected fixed hopper, thereby forming the aggregate with a weight within the allowable range. It becomes possible. By discharging this assembly from the fixed hopper, an assembly having an allowable weight can be obtained.
Further, in the returning step, by returning the weighing object that is not supplied to the fixed hopper from the swivel hopper to the weighing object supply unit, a measure for removing the weighing object that has accumulated in the swirl hopper becomes unnecessary, and the apparatus is Continuous operation is possible without stopping.
Further, in the turning speed increasing step, when the ratio of the weighing object to be returned to the weighing object supply unit becomes equal to or higher than the first threshold value, the turning speed of the plurality of turning hoppers is increased so that the weighing to the fixed hopper is performed. The input amount of the object can be increased, and a decrease in the processing efficiency of the apparatus can be suppressed.

(8) In one embodiment, in the method of (7),
In the returning step,
When the ratio of the weighing object discharged to the return unit is equal to or greater than a first threshold, the turning speed of the plurality of turning hoppers is increased and the weighing object supplied to the plurality of turning hoppers is increased. Do not change the supply.
According to the above method (8), the proportion of acceptable products can be increased, and the proportion of weighing objects discharged to the return portion can be reduced.

(9) In one embodiment, in the configuration of (7) or (8),
A turning speed reduction step of reducing turning speeds of the plurality of turning hoppers when the ratio of the weighing objects returned to the weighing object supply unit in the returning step is less than a second threshold value;
According to the method of (9) above, when the ratio of the aggregate of the weighing objects returned to the inlet side weighing step becomes less than the second threshold value, by reducing the turning speed of the turning hopper, The apparatus can be stably operated while ensuring the number of acceptable products.

(10) In one embodiment, in any one of the methods (7) to (9),
An upper limit value increasing step for increasing the upper limit value of the permissible range when the ratio of the weighing object returned to the weighing object supply unit in the returning step becomes equal to or greater than a third threshold value;
According to the method of (10) above, when the ratio of the measurement object returned to the measurement object supply unit increases, the upper limit value of the allowable range of the weight of the measurement object assembly supplied to the fixed hopper is increased. Thereby, the yield fall of an acceptable product can be suppressed, and, thereby, the processing efficiency fall of an apparatus can be suppressed.

(11) In one embodiment, in any one of the methods (7) to (10),
An upper limit reducing step for reducing the upper limit value of the allowable range when the ratio of the weighing object returned to the weighing object supply unit in the returning step is less than a fourth threshold value;
According to the method of (11) above, when the ratio of the measurement object returned to the measurement object supply unit is less than the fourth threshold, the upper limit value of the weight of the allowable range is reduced, The weighing accuracy of the collection of objects can be brought close to the initial allowable range.

  According to one embodiment, when an automatic weighing combination of weighing objects is performed, even if a weighing object that does not fall within the allowable weight is generated, a defective product that does not fall within the allowable weight is generated. A decrease in processing efficiency of the apparatus can be suppressed.

It is a perspective view of the automatic weighing combination device concerning one embodiment. It is a perspective view of the automatic weighing combination device concerning one embodiment. It is a block diagram which shows the control part of the automatic weighing combination apparatus which concerns on one Embodiment. It is process drawing of the automatic measurement combination method which concerns on one Embodiment.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples.
For example, expressions expressing relative or absolute arrangements such as “in a certain direction”, “along a certain direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial” are strictly In addition to such an arrangement, it is also possible to represent a state of relative displacement with an angle or a distance such that tolerance or the same function can be obtained.
For example, an expression indicating that things such as “identical”, “equal”, and “homogeneous” are in an equal state not only represents an exactly equal state, but also has a tolerance or a difference that can provide the same function. It also represents the existing state.
For example, expressions representing shapes such as quadrangular shapes and cylindrical shapes represent not only geometrically strict shapes such as quadrangular shapes and cylindrical shapes, but also irregularities and chamfers as long as the same effects can be obtained. A shape including a part or the like is also expressed.
On the other hand, the expressions “comprising”, “comprising”, “comprising”, “including”, or “having” one constituent element are not exclusive expressions for excluding the existence of other constituent elements.

1 and 2 show an automatic weighing and combining apparatus 10 according to one embodiment.
In FIG. 1 and FIG. 2, weighing objects divided into a plurality of groups are intermittently supplied from the weighing object supply unit to the inlet-side weighing unit 12, and the weight of the weighing object for each group in the inlet-side weighing unit 12. Is measured. A plurality of swivel hoppers 14 are arranged around the rotation shaft 60 in the circumferential direction. The turning hopper 14 is configured to be able to receive the weighing object whose weight is measured by the inlet-side weighing unit 12 while turning around the rotation shaft 60. The plurality of swivel hoppers 14 receive the weighing objects for each group and hold the received weighing objects until they are supplied to the fixed hopper 16.
Each of the plurality of fixed hoppers 16 is configured to receive the weighing object from the swivel hopper 14, and can form a collection of weighing objects having an allowable weight by receiving the weighing object a plurality of times. And a collection of received weighing objects is configured to be discharged.

  An object to be weighed that is not supplied from the turning hopper 14 to the fixed hopper 16 is discharged to the return unit 18. The weighing object discharged to the return unit 18 can be returned from the return unit 18 to the weighing object supply unit.

FIG. 3 shows the control unit 20 of the automatic weighing and combining apparatus 10. Based on the measured value of the weight of the weighing object measured by the inlet-side weighing unit 12, the control unit 20 selectively selects which of the plurality of fixed hoppers 16 the weighing object accommodated in the plurality of swivel hoppers 14. Or it operates to be supplied to the return unit 18.
That is, the control unit 20 selects a fixed hopper 16 that can form an aggregate of weighing objects having a weight within a predetermined allowable range from the plurality of fixed hoppers 16, and selects the selected fixed hopper 16. It operates to supply a collection of objects to be weighed with an acceptable weight. Further, the control unit 20 operates so as to discharge the measurement object that is not discharged to the fixed hopper 16 to the return unit 18.
Further, the control unit 20 operates to increase the turning speed of the turning hopper 14 when the ratio of the weighing object discharged to the return unit 18 becomes equal to or higher than the first threshold value.

According to the above configuration, by supplying a set of weighing objects having an allowable weight to the fixed hopper 16 selected by the control unit 20, the weighing object having an allowable weight to the selected fixed hopper 16 is supplied. An assembly of objects (accepted product) can be formed. By discharging the aggregate from the fixed hopper 16, an acceptable product having an allowable weight can be sent out.
In addition, by discharging the weighing object that is not supplied to the fixed hopper 16 from the swivel hopper 14 to the return unit 18, a measure for removing the weighing object remaining in the swirl hopper 14 becomes unnecessary, and the apparatus 10 is not stopped. Can be operated continuously.

In addition, when the ratio of the weighing object discharged to the return unit 18 becomes equal to or higher than the first threshold value, the control unit 20 increases the turning speed of the turning hopper 14 so that the weighing object is put into the fixed hopper 16. The amount can be increased, and a decrease in the processing efficiency of the apparatus 10 can be suppressed.
Further, the weighing object can be supplied to the fixed hopper 16 while turning the plurality of turning hoppers 14 along the horizontal direction.

In one embodiment, when the control unit 20 determines that the weight of the weighing object accommodated in each turning hopper 14 is not within the allowable range in combination with the weight of the weighing object of the other turning hopper 14, the turning is performed. The weighing object accommodated in the hopper 14 is operated so as to be discharged to the return unit 18.
According to this embodiment, the weight of the weighing object accommodated in one of the swivel hoppers 14 does not fall within the allowable range in combination with the weight of the weighing object of the other swirl hopper 14, and one of the fixed hoppers 16. By discharging the objects to be measured that are not expected to be supplied to the return unit 18 to the return unit 18, continuous operation can be performed without stopping the apparatus 10.

  In one embodiment, the control unit 20 increases the turning speed of the plurality of turning hoppers 14 and the plurality of turning hoppers when the ratio of the weighing object discharged to the return unit 18 is equal to or greater than a first threshold value. The supply amount of the weighing object supplied to 14 is not changed. Thereby, the ratio of the acceptable product increases, and the ratio of the weighing object discharged to the return unit 18 can be reduced.

  In one embodiment, the object to be weighed varies in weight from individual to individual, for example, chicken, etc. When the object to be weighed is a piece of meat, it may be frozen meat or raw meat. Further, the weighing object can be applied not only to articles having a certain size and shape but also to automatic weighing of roses, for example, granular materials grouped.

In one embodiment, as shown in FIGS. 1 and 2, the apparatus 10 includes a supply inclined belt conveyor 22, and the supply inclined belt conveyor 22 has bars 24 at regular intervals. The object to be weighed thrown into the feeding hopper 21 is conveyed by the supply inclined belt conveyor 22 while maintaining a constant interval by the crosspieces 24 and falls to the belt conveyor 26 before weighing.
The weighing object that has dropped onto the pre-weighing belt conveyor 26 is transferred to the inlet-side weighing belt conveyor as the inlet-side weighing unit 12 while maintaining a constant interval. An article detection sensor 27 for detecting an object to be weighed is provided at the boundary between the pre-weighing belt conveyor 26 and the inlet-side weighing belt conveyor. The object to be weighed falls from the entrance-side weighing belt conveyor to the standby hopper 28 at regular time intervals, and is supplied from the standby hopper 28 to the turning hopper 14 via the input hopper 30.
In one embodiment, the weighing object supply unit is a charging hopper 21.

  In one embodiment, as shown in FIGS. 1 and 2, the supply inclined belt conveyor 22, the pre-weighing belt conveyor 26, the standby hopper 28, the charging hopper 30, and the turning hopper 14 (14 a, 14 b) are arranged in two rows, respectively. It is arranged, and the weighing object can be conveyed independently in each row and the conveyance speed can be controlled.

In one embodiment, as shown in FIG. 1 and FIG. 2, an aggregate (accepted product) of the weighing objects that is within an allowable range and is accommodated in each fixed hopper 16 is discharged from each fixed hopper 16. It is placed on the conveyor belt conveyor 32. Thereafter, the aggregate of the objects to be weighed is transported by the transporting belt conveyor 32, placed on the outlet side weighing belt conveyor 36 via the sorting hopper 34, and the weight is measured by the outlet side weighing belt conveyor 36. The accepted product is transferred from the exit-side weighing belt conveyor 36 to the carry-out inclined belt conveyor 38.
If there is an aggregate of objects to be weighed that are not in the allowable range on the outlet side weighing belt conveyor 36, the outlet side weighing belt conveyor 36 moves in the reverse direction by the control unit 20 and is excluded from the acceptable products.

  In one embodiment, as shown in FIG. 2, the return unit 18 includes a return hopper 40 and a return belt conveyor 42. The weighing object that is not supplied to the fixed hopper 16 and remains in the swivel hopper 14 is placed on the return belt conveyor 42 via the return hopper 40, and is transferred from the return belt conveyor 42 to the charging hopper 21 (measurement object supply unit). Returned.

  In one embodiment, the standby hopper 28 (28a, 28b) has an upper end opening for receiving the weighing object and a lower end opening for dropping the weighing object. The lower end opening is provided with a lower door (not shown) for opening and closing the lower end opening and an actuator 50 (see FIG. 3) for opening and closing the lower door, and the operation of the actuator 50 is controlled by the control unit 20.

  In one embodiment, the charging hopper 30 has a lower door (not shown) that opens and closes the lower opening, and the lower door is driven by a cam mechanism (not shown) provided in the turning hopper 14. When the swivel hopper 14 is positioned directly below, it is opened and the object to be weighed is supplied to the swirl hopper 14.

In one embodiment, the swivel hopper 14 has a lower door (not shown) that opens and closes the lower opening, and the lower door is connected to the swivel hopper 14 by a cam mechanism (not shown) provided on the fixed hopper 16. When the fixed hopper 16 is located directly below, it is opened and the object to be weighed falls to the fixed hopper 16.
In addition, an actuator 52 (see FIG. 3) is provided that, when the fixed hopper 16 is positioned directly below the turning hopper 14, switches the cam mechanism so that the lower door can be opened and closed.
The control unit 20 can select the fixed hopper 16 that supplies the weighing object when the weighing object is supplied from the turning hopper 14 to the fixed hopper 16 by controlling the operation of the actuator 52.

  In one embodiment, the fixed hopper 16 has an upper opening that receives a weighing object from the swivel hopper 14 and a lower opening that drops a collection of stored weighing objects, and opens and closes the lower opening. A lower door (not shown) is provided. The lower door is opened and closed by an actuator 54 (see FIG. 3). The operation of the actuator 54 is controlled by the control unit 20 (refer to Patent Document 1 for details of the opening / closing mechanism of the lower door of the standby hopper 28, the closing hopper 30, the turning hopper 14, and the fixed hopper 16).

In one embodiment, the control unit 20 reduces the turning speed of the turning hopper 14 when the ratio of the weighing object discharged to the return unit 18 becomes less than the second threshold value.
According to this embodiment, when the ratio of the aggregates of the weighing objects discharged to the return unit 18 becomes less than the second threshold value, the supply amount of the weighing objects to the turning hopper 14 is reduced, so that the unit The apparatus 10 can be stably operated while securing the number of acceptable products per hour.

  In one embodiment, the second threshold value is set to a value smaller than the first threshold value. In this case, when the ratio of the weighing object discharged to the return unit 18 becomes equal to or higher than the first threshold, the turning speed of the turning hopper 14 is increased, and then the ratio of the weighing object discharged to the return unit 18 is increased. When it becomes less than the second threshold value having a value smaller than the first threshold value, the turning speed of the turning hopper 14 may be reduced, for example, returned to the original turning speed.

  In one embodiment, as shown in FIGS. 1 and 2, the plurality of fixed hoppers 16 overlap the plurality of swivel hoppers 14 in plan view below the plurality of swirl hoppers 14 arranged in an arc shape in a horizontal plane. Thus, they are arranged in an arc shape in a horizontal plane. This facilitates the alignment between the swivel hopper 14 and the fixed hopper 16 and facilitates the supply of the weighing object from the swivel hopper to the fixed hopper.

In one embodiment, as shown in FIGS. 1 and 2, five fixed hoppers 16 are provided.
According to this embodiment, the aggregates of the weighing objects supplied to the five fixed hoppers 16 are made to have different allowable ranges, thereby obtaining a collection of weighing objects having five different weights. be able to.

In one embodiment, the control unit 20 has an allowable range of the weight of the weighing object assembly supplied to the fixed hopper 16 when the ratio of the weighing objects discharged to the return unit 18 is equal to or greater than a third threshold value. Try to increase the upper limit.
According to this embodiment, by increasing the upper limit value of the allowable range, it is possible to suppress a decrease in yield of acceptable products, thereby suppressing a decrease in processing efficiency of the apparatus 10.

In one embodiment, the control unit 20 reduces the upper limit value of the weight within the allowable range when the proportion of the measurement object discharged to the return unit 18 becomes less than the fourth threshold value.
According to this embodiment, when the ratio of the aggregates of the weighing objects discharged to the return unit 18 decreases, the weighing accuracy of the aggregates of the weighing objects is reduced by reducing the upper limit value of the weight within the allowable range. The initial tolerance can be approached.

In one embodiment, the fourth threshold is set to a value smaller than the third threshold. In this case, when the ratio of the weighing object discharged to the return unit 18 becomes equal to or greater than the third threshold value, the upper limit value of the allowable weight is increased, and then the ratio of the weighing object discharged to the return unit 18 When the value becomes less than the fourth threshold value having a value smaller than the third threshold value, the upper limit value of the weight of the allowable range may be reduced, for example, returned to the initial upper limit value.
As a result, stable operation of the apparatus 10 becomes possible while suppressing a decrease in yield of acceptable products.

In one embodiment, the third threshold is greater than the first threshold. In this case, when the ratio of the aggregate of the weighing objects discharged to the return unit 18 increases and becomes equal to or higher than the first threshold value, the turning speed of the turning hopper 14 is increased. Next, when the ratio of the aggregate of the weighing objects discharged to the return unit 18 further increases and becomes equal to or higher than the third threshold value, the upper limit value of the weight in the allowable range is increased.
Thus, by performing the two-stage control as the ratio of returned products increases, it is possible to suppress a reduction in processing efficiency of the apparatus 10 without producing defective products. Further, even in the process of reducing the ratio of returned products, the same two-stage control can be performed, so that the number of acceptable products can be ensured while maintaining the measurement accuracy of the collection of measurement objects.

In one embodiment, the weighing objects are configured to be sequentially supplied to the plurality of swivel hoppers 14 in a non-selective order for each group.
According to this embodiment, since the weighing object can be sequentially supplied to the plurality of swivel hoppers 14 in an unselected manner, the speed at which the weighing object is supplied to the plurality of swirl hoppers 14 can be increased. 10 processing efficiency can be improved.

  In one embodiment, the control unit 20 controls the actuator 50 that opens and closes the lower door of the standby hopper 28, the opening of the lower door is always open, and the weighing object is put into the standby hopper 28; By synchronizing the timing at which the turning hopper 14 is positioned directly below the charging hopper 30, it becomes possible to supply an unselected weighing object to the turning hopper 14.

FIG. 4 is a process diagram showing an automatic weighing combination method according to an embodiment.
In FIG. 4, first, the weighing object is divided into a plurality of groups from the weighing object supply unit to the inlet-side weighing unit 12, and the weighing object is supplied at predetermined intervals. If necessary, an article detection sensor 27 provided at the boundary between the pre-weighing belt conveyor 26 and the inlet-side weighing belt conveyor as the inlet-side weighing unit 12 allows the weighing object to be carried into the inlet-side weighing belt conveyor to be measured. Detect (weighing object detection step S10).
Next, the inlet-side weighing unit 12 measures the weights of a plurality of weighing objects that are divided into a plurality of groups and supplied intermittently (inlet-side weighing step S12).
In one embodiment, the weight of the weighing object that is intermittently supplied in the inlet-side weighing unit 12 is measured using the detection signal of the article detection sensor 27 as a trigger.

Next, the plurality of swivel hoppers 14 arranged in the circumferential direction around the rotating shaft 60 receive the weighing objects whose weights are measured in the inlet-side weighing step S12 while turning, for each group (weighing preparation step S14). .
In one embodiment, as shown in FIG. 1, the weighing object whose weight is measured by the inlet-side weighing unit 12 is thrown into the plurality of swivel hoppers 14 via the standby hopper 28 and the loading hopper 30.

  In one embodiment, the control unit 20 controls the actuator 50 that opens and closes the lower door of the standby hopper 28 so that the lower door is always opened and the weighing object is put into the standby hopper 28. By synchronizing the timing at which the turning hopper 14 is positioned directly below the charging hopper 30, it becomes possible to supply an unselected weighing object to the turning hopper 14.

After the weighing preparation step S <b> 14, in the plurality of fixed hoppers 16 at positions to receive the objects to be weighed from the plurality of swivel hoppers 14, the plurality of swivel hoppers 14 out of the plurality of fixed hoppers 16 A fixed hopper 16 capable of forming an aggregate of weighing objects that will receive an allowable weight by receiving the object is selected (selection step S16).
Next, in the weighing and discharging step S20, a set of objects to be weighed with an allowable weight is supplied to the selected fixed hopper 16 (distribution step S24), and an aggregate of objects to be weighed with an allowable weight. The assembly is discharged from the fixed hopper 16 containing the container (discharge step S26).

On the other hand, the weighing object that is not delivered from the turning hopper 14 to the fixed hopper 16 is discharged from the turning hopper 14 and returned to the inlet-side weighing step S12 (returning step S22).
Further, when the ratio of the measurement object returned to the inlet-side weighing step S12 in the return step S22 becomes equal to or higher than a first threshold (for example, 20%) (first threshold step S23), the turning speeds of the plurality of turning hoppers 14 are set. Increase (turning speed increasing step S28).

According to the above method, in the selection step S16, by supplying a set of objects to be weighed with an allowable range weight to the selected fixed hopper 16, the aggregate having an allowable range weight can be formed. By discharging this assembly from the fixed hopper 16, an assembly having an allowable weight can be obtained.
Further, in the return step S22, by returning the weighing object that is not supplied to the fixed hopper 16 from the turning hopper 14 to the weighing object supply unit, a measure for removing the weighing object staying in the turning hopper 14 becomes unnecessary. Continuous operation is possible without stopping the apparatus 10.

Further, in the turning speed increasing step S28, the turning speed of the plurality of turning hoppers 14 is increased when the ratio of the weighing object returned to the weighing object supply unit becomes equal to or higher than the first threshold value.
Further, since the weighing object can be supplied to the fixed hopper 16 while turning the plurality of turning hoppers 14 along the horizontal direction, the overall height of the device can be reduced and the device can be made compact.
Furthermore, by disposing the stationary hopper 16 stationary below the turning hopper 14, it becomes easy to supply the weighing object from the turning hopper 14 to the fixed hopper 16.

  In one embodiment, in step S18, the weighing object for which the fixed hopper 16 is selected in the selection step S16 is distributed to the selected fixed hopper 16 (distribution step S24), and the weighing object that has not been distributed to the fixed hopper 16 is used. The object is returned to the weighing object supply unit (for example, the charging hopper 21 shown in FIG. 1) (returning step S22). The aggregate of the weighing objects distributed to the fixed hopper 16 is discharged to the conveyor belt conveyor 32 shown in FIG. 1 (discharge step S26).

In one embodiment, in the returning step S22, when the ratio of the weighing object returned to the weighing object supply unit during the increase in the turning speed is less than a second threshold value (for example, 15%) (second threshold value step S25). The turning speed of the plurality of turning hoppers 14 is reduced (turning speed reduction step S30).
According to this embodiment, when the ratio of the aggregate of the measurement objects returned to the inlet-side weighing step S12 is less than the second threshold, the swivel speed of the swivel hopper 14 is reduced, thereby passing the unit time. The apparatus 10 can be stably operated while securing the number of products.

In one embodiment, when the ratio of the measurement object returned to the measurement object supply unit in the return step S22 is equal to or greater than a third threshold value (for example, 30%) (third threshold value step S27), the upper limit of the allowable range weight. The value is increased (upper limit value increasing step S32).
According to this embodiment, the upper limit value of the allowable range of the weight of the weighing object assembly supplied to the fixed hopper 16 when the ratio of the weighing object returned to the weighing object supply unit is equal to or greater than the third threshold value. By increasing the value, it is possible to suppress a decrease in yield of acceptable products, thereby suppressing a decrease in processing efficiency of the device 10.

In one embodiment, in the returning step S22, when the ratio of the weighing object returned to the weighing object supply unit during the increase of the upper limit value is less than a fourth threshold value (for example, 25%) (fourth threshold value step S29). The upper limit value of the allowable range is reduced (upper limit reduction step S34).
According to this embodiment, when the ratio of the collection of measurement objects returned to the measurement object supply unit is reduced, the measurement of the collection of measurement objects to be generated is performed by reducing the upper limit value of the allowable range. The accuracy can be brought close to the weighing accuracy of the original assembly.
In one embodiment, the fourth threshold is set to a value smaller than the third threshold.

In one embodiment, in the discharge step S26, the aggregate of the weighing objects discharged from the fixed hopper 16 with an allowable weight is measured here (exit-side weighing step S36), and is within the allowable range. It is determined whether or not it is present (determination step S38).
In the embodiment shown in FIG. 1, the aggregate of the weighing objects discharged from the fixed hopper 16 to the conveying belt conveyor 32 is placed on the outlet-side weighing belt conveyor 36 via the sorting hopper 34, and the outlet-side weighing belt. The weight is measured by the conveyor 36.
If the weight of the collection of weighing objects is within the allowable range, the collection of weighing objects is transferred as a normal route from the exit-side weighing belt conveyor 36 to the carry-out inclined belt conveyor 38 (unloading step S40). ).

On the other hand, when the weight of the collection of measurement objects is not within the allowable range, the measurement object is returned to the measurement object supply unit (final return step S42).
In the embodiment shown in FIG. 1, when the weight of the collection of weighing objects is not within the allowable range, the outlet-side weighing belt conveyor 36 moves in the reverse direction and is excluded from the acceptable product, and then the weighing object. It is returned to the supply unit (for example, the charging hopper 21). Thereby, it is possible to prevent the rejected product from being mixed with the accepted product.

  According to one embodiment, in the automatic weighing and combining apparatus, even if a weighing object that does not fall within the allowable range is generated, the processing efficiency of the apparatus is reduced without causing defective products that do not fall within the allowable range. Can be suppressed. In addition, as an object to be weighed, not only an article having a certain size and shape but also an automatic weighing of a group of rose articles, for example, granular articles can be applied.

DESCRIPTION OF SYMBOLS 10 Automatic weighing combination apparatus 12 Inlet side weighing | measuring part 14 (14a, 14b) Turning hopper 16 Fixed hopper 18 Return part 20 Control part 21, 30 Loading hopper 22 Inclination belt conveyor for feeding 24 Cross 26 Belt conveyor before measurement 27 Article detection sensor 28 (28a, 28b) Standby hopper 32 Conveying belt conveyor 34 Sorting hopper 36 Exit-side weighing belt conveyor 38 Conveying inclined belt conveyor 40 Return hopper 42 Return belt conveyor 50, 52, 54 Actuator 60 Rotating shaft

Claims (11)

An inlet-side weighing unit capable of measuring the weight of the weighing object that is divided into a plurality of groups and intermittently supplied from the weighing object supply unit;
A plurality of swivel hoppers arranged in a circumferential direction around a rotating shaft and capable of receiving the weighing object whose weight is measured by the inlet-side weighing unit while swiveling around the rotating shaft;
A plurality of fixed hoppers capable of receiving the weighing objects from the plurality of swiveling hoppers, and forming the aggregate of the weighing objects having an allowable weight by receiving the weighing objects a plurality of times. A plurality of fixed hoppers that are capable of discharging the aggregate of received weighing objects;
A return unit for receiving the measurement object that is not supplied to the plurality of fixed hoppers from the plurality of swivel hoppers and returning the measurement object to the measurement object supply unit;
Based on the measured value of the weight of the measurement object measured by the inlet-side measurement unit, the measurement object accommodated in the swivel hopper is selectively supplied to the plurality of fixed hoppers or the return unit. A control unit of
With
The controller is
A fixed hopper capable of forming an aggregate of the weighing objects having a weight within the allowable range is selected from the plurality of fixed hoppers, and the aggregate of the weighing objects is supplied to the selected fixed hopper. Composed of
The automatic weighing and combining apparatus is configured to increase the turning speed of the plurality of turning hoppers when the ratio of the weighing object discharged to the return portion is equal to or greater than a first threshold value. . The controller is
When the ratio of the weighing object discharged to the return unit is equal to or greater than a first threshold, the turning speed of the plurality of turning hoppers is increased and the weighing object supplied to the plurality of turning hoppers is increased. 2. The automatic weighing and combining apparatus according to claim 1, wherein the automatic weighing and combining apparatus is configured not to change a supply amount. The controller is
It is comprised so that the turning speed of these turning hoppers may be reduced when the ratio of the said measurement object discharged | emitted by the said return part becomes less than 2nd threshold value. Automatic weighing combination device as described. The controller is
4. The apparatus according to claim 1, wherein an upper limit value of the permissible range is increased when a ratio of the measurement object discharged to the return unit becomes equal to or greater than a third threshold value. The automatic weighing combination apparatus according to one item. The controller is
5. The apparatus according to claim 1, wherein the upper limit value of the allowable range is reduced when a ratio of the measurement object discharged to the return unit is less than a fourth threshold value. The automatic weighing combination apparatus according to one item.   6. The automatic weighing and combining apparatus according to claim 1, wherein the third threshold value is larger than the first threshold value. An inlet-side weighing step for measuring the weight of a plurality of weighing objects which are divided into a plurality of groups and intermittently supplied from the weighing object supply unit;
A plurality of swivel hoppers arranged in a circumferential direction around a rotating shaft, and a weighing unit that receives the weighing object whose weight has been measured in the inlet-side weighing step for each group while swiveling the swivel hoppers Preparation steps,
Preparing a plurality of fixed hoppers for receiving the weighing object from the plurality of swivel hoppers, and receiving the weighing object for a plurality of times from the plurality of swivel hoppers of the plurality of fixed hoppers. A selection step of selecting the fixed hopper capable of forming an assembly of the weighing objects to be weighted;
A metering and discharging step of supplying the aggregate of the objects to be weighed having a weight within the allowable range to the selected fixed hopper and discharging the aggregate from the fixed hopper;
A step of discharging the weighing object that is not delivered from the plurality of swiveling hoppers to the plurality of fixed hoppers and returning the weighing object to the weighing object supply unit;
A turning speed increasing step for increasing the turning speed of the plurality of turning hoppers when the ratio of the weighing object returned to the weighing object supply unit in the returning step is equal to or greater than a first threshold;
An automatic weighing combination method characterized by comprising: In the returning step,
When the ratio of the weighing object discharged to the return unit is equal to or greater than a first threshold, the turning speed of the plurality of turning hoppers is increased and the weighing object supplied to the plurality of turning hoppers is increased. 8. The automatic weighing combination method according to claim 7, wherein the supply amount is not changed.   A turning speed reduction step of reducing a turning speed of the plurality of turning hoppers when a ratio of the weighing object returned to the weighing object supply unit in the returning step is less than a second threshold value. The automatic weighing combination method according to claim 7 or 8.   An upper limit value increasing step of increasing an upper limit value of the allowable range when a ratio of the weighing object returned to the weighing object supply unit in the returning step becomes a third threshold value or more. Item 10. The automatic weighing combination method according to any one of Items 7 to 9.   An upper limit reduction step for reducing an upper limit value of the allowable range when the ratio of the measurement target returned to the measurement target supply unit in the return step becomes less than a fourth threshold value. Item 11. The automatic weighing combination method according to any one of Items 7 to 10.

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