JPH1151754A - Compound type combination metering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply combination within tolerance with a fixed discharge pitch without generating extraction by providing two combination metering devices with the same configuration, and by discharging a combined object to be metered from only either metering device downstream. SOLUTION: One compound type combination metering device is constituted of combination metering devices A and B in the same configuration and the CPUs of each microcomputer are connected by a communication means. Then, in a stationary state where both of the metering devices A and B can be combined and be discharged, either one metering device is allowed to perform combination discharge and at the same time the other is allowed to stand by. Also, for example, when only one metering device A is capable of combination discharge, the metering device A is allowed to perform combination discharge, the metering device B that cannot perform combination discharge is allowed to perform recovery operation, and the cycle time of the combination discharge is set to the same value in both of the stationary and one lung states. Therefore, even if either of the metering devices A and B cannot perform discharge, the other can perform discharge, so that correct amount of combination C can be supplied with a fixed cycle and at the same time without generating extraction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination weighing device having a large number of weighing hoppers.

[0002]

2. Description of the Related Art A combination weighing apparatus collects a plurality of objects to be weighed, such as confectionery, fruits, and vegetables, each having a different weight to obtain a target weight, or a weighing object having a fixed weight such as a screw. Is the target number (see, for example, JP-A-63-30725). FIG. 8 shows an example of this kind of combination weighing device.

In FIG. 8, a conveyor 12 drops an object M to be weighed to the center of a dispersion feeder 20. A number of supply troughs 3 _i are provided on the periphery of the dispersion feeder 20. The dispersion feeder 20 and each of the supply troughs 3 _i vibrate by driving the vibrating device, respectively, so that the objects M on the dispersion feeder 20 can be moved into a large number of pool hoppers 4 _i.
To send to. Each pool hopper 4 _i A gate 5 _i are provided, also, weighing hoppers 6 _i is provided thereunder. Each weighing hopper 6 _i has a hopper weighing device 7
_i and a gate _8i . Below the gate 8 _i, a large collecting discharge chute 9 is provided, and by combining the weights of the objects to be weighed obtained by the hopper weighing device 7 _i , the objects to be weighed M are put together to achieve the target weight or the target weight. Make the weight close to the target weight.

[0004]

By the way, in the case of packing products, the target weight is set as the allowable lower limit value, while the allowable upper limit value is set, for example, so as not to cause unreasonable packing. If there is no such combination of the allowable range, conventionally, the object M is discharged to another outlet without discharging the object M to the packaging machine P (external discharge). In this case, the packaging machine P cannot be bagged, an empty bag appears, and it becomes necessary to perform a later abnormal process, which complicates the processing of the downstream production line including the packaging machine P.

Therefore, when there is no allowable range combination,
Is one to three pool hoppers 4 _iWeighing hopper from
6_iUnions that provide additional supplies to obtain acceptable combinations
2. Description of the Related Art
No. 6127). But make such additional supply
In the method, an empty bag (empty) always appears for one cycle
You. Also, even if additional supply is performed, combinations of allowable
There is no guarantee. And pool hopper 4_iWeighing from
6_iTo be weighed is additionally supplied to the
Weighing hopper 6 that cannot participate in calculation_i, That is, the target upper limit
Overscale weighing hopper 6_iAppears
It is inevitable that things will get worse.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and provides a combined combination weighing apparatus which has a high possibility of supplying a combination of allowable ranges at a constant discharge pitch and without dropout. It is to be.

[0007]

In order to achieve the above object, the present invention provides two combination weighing devices and discharges a combined object to be weighed downstream from only one of the combination weighing devices. Like that.

According to the present invention, the combination discharge is performed from only one of the two units. Therefore, if there is no combination within the allowable range in one of the combination weighing devices, the combination discharge is performed from the other combination weighing device. , The recovery operation of the one combination weighing device can be performed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the combination weighing device A on the left side (hereinafter, referred to as “unit A”) and the combination weighing device B on the right side (hereinafter, referred to as “unit B”) have the same configuration. Thus, one composite combination weighing device is configured. The mechanism for performing combination weighing in Units A and B is the same as that of the conventional example of FIG. 8 described above, and the same or corresponding parts are denoted by the same reference numerals.

Each of the units A and B has a collective discharge chute 9
Are provided with timing hoppers 1A and 1B, respectively. Downstream of each of the timing hoppers 1A and 1B, supply chutes 10, 10 to one common packaging machine P are provided, respectively.
And an outside discharge chute 11, 11 are provided.
The out-of-system discharge chute 11 is a combination within an allowable range
The weighing object M other than the "positive amount combination" C) is placed in the packaging machine P
It is not for discharge outside the system.

Each of the timing hoppers 1A and 1B has a positive discharge gate 2Ar, 2Br that opens and closes to discharge the object M to the packaging machine P at a predetermined timing, and a discharge chute 11 outside the system. External discharge gates 2Aw and 2Bw that are opened and closed to discharge the weighed material M are provided. That is, the positive discharge gate 2Ar (2Br) and the outside discharge gate 2Aw
(2Bw) indicates that only one of them is opened and the weighing object M accommodated in the timing hopper 1A (1B) is packed in the packaging machine P.
And outside the system. Each of these gates 2Ar, 2Aw,
2Br and 2Bw are always closed, and only one of the positive discharge gates 2Ar and 2Br is opened, and the positive combination C is supplied to the packaging machine P.

The above-mentioned No. A and No. B are microcomputers (microcomputers) Am and Bm shown in FIG.
The microcomputer Am performs a predetermined combination operation or the like.
And Bm have the same configuration and software (programs, setting values, etc.). Two microcomputers Am and B
In the case of m, the CPUs communicate with each other via a communication unit to perform switching of a combination discharge operation described later.

That is, as will be described below, the present combined type combination weighing device is configured such that, when one combination weighing device A (or B) performing the combination discharge becomes unable to select the positive amount combination C, the other combination weighing device becomes ineffective. The combination weighing device B (or A) starts the combination discharge, and performs the recovery operation so that the one combination weighing device A (or B) can perform the combination discharge. Hereinafter, the operation of the present combined-type combination weighing device will be described with reference to the flowcharts of FIGS.

First, based on the flowchart of FIG.
The stationary combination discharge operation of the unit will be described. If the A-unit is set to the steady mode in which the positive combination C can be selected, the process proceeds to step S1. In step S1, it is determined whether or not the main flag of the car A is at the high level H. If the main flag is at the high level H, the process proceeds to step S2. In step S2, after waiting for a timing signal as a trigger to be output from the packaging machine P, the process proceeds to the next step S3, in which the positive discharge gate 2Ar of the timing hopper 1A of the No. A machine opens, and the positive combination C Is supplied to the packaging machine P via the supply chute 10.

[0015] In the next step S4, the weight of the car A weighing hoppers 6 _i is input, the process proceeds to step S5, combining the one or more metrics of car A hopper weight measuring device 7 _i arbitrarily selected and Thus, a combination operation is performed. In the next step S6, it is determined whether or not there is a positive amount combination C.
The objects M to be weighed are collectively discharged from the weighing hopper 6 _i selected and combined with the machine A to the timing hopper 1A,
The process further proceeds to step S8, where the pool hopper 4 _i of the A-unit is
The articles M are supplied to the weighing hoppers 6 _i from the flow returns to step S1. That is, the No. A machine performs steps S1 to S8.
Is repeated, the positive amount combination C is supplied to the packaging machine P at a constant cycle time (pitch).

On the other hand, if there is no positive amount combination C in step S6, the process proceeds to step S9. At step S9, the microcomputer Am of the car A outputs a flag switching signal to the microcomputer Bm of the car B so that the main flag of the car B is switched to the low level L and the microcomputer Bm of the car B is switched to the high level H. I do. As a result, the A-unit proceeds to the next step S10, and enters the recovery mode of FIG.
Unit B performs the combined discharge by performing the operation in the steady mode shown in FIG.

Next, an example of the recovery operation of the A-unit will be described with reference to FIG. Unit A enters recovery mode,
In the next step S11, an overscale weighing hopper 6 _i exceeding the target upper limit value of the weighing hopper 6 _i set in advance.
Determines whether there is, if there is no weighing hopper 6 _i of the overscale, the process proceeds to step S15, whereas, if there is the weighing hoppers 6 _i of overscale, step S1
Go to 2 to S14.

[0018] In step S12, opens the gate 8 _i of the weighing hoppers 6 _i of overscale of car A,
The objects to be weighed M of the weighing hopper 6 _i via the collecting and discharge chute 9 is discharged to the timing hopper 1A. After this,
Proceeds to step S13, and supplies the objects to be weighed M from the pool hoppers 4 _i the weighing hoppers 6 _i performing the discharge. Then, the process proceeds to step S14, where the timing hopper 1A
Is opened, the object M in the timing hopper 1A is discharged out of the system via the system discharge chute 11, and the process proceeds to step S16. On the other hand, step S15
In, after additional supply to one or more weighing hoppers 6 _i, the process proceeds to step S16.

At step S16, a combination operation is performed, and the routine proceeds to step S17, where it is determined whether or not there is a positive amount combination C. If the result of this determination is that there is no positive amount combination C, the flow returns to step S11. That is, the A-unit performs the recovery operation by repeating the steps S11 to S17.

On the other hand, if there is a positive amount combination C in step S17, the process proceeds to the next step S18, where the collecting chutes 9 from the weighing hoppers 6 _i selected for the combination.
The objects to be weighed M are collectively discharged to the timing hopper 1A via the hopper. Thus, the timing hopper 1A can immediately supply the positive quantity combination C to the packaging machine P (if the timing signal from the packaging machine P is input) when the combination discharge of the No. B machine becomes impossible.

In step S19 following step S18, the weighing hopper 6 _i selected in combination is set to the pool hopper 4 _i.
, And returns to step S1 in FIG. 3 to stand by.

On the other hand, the steady mode of the car B is executed in steps N1 to N9 in FIG. Steps N1 to N of Unit B
The operation of No. 8 is the same as Steps S1 to S8 of the above-mentioned A-th car, and the description thereof is omitted. Step N1 of Unit B
-N8, the combined discharge from the machine B to the packaging machine P is performed.
Recovery operation is performed.

In Step N6 of Unit B, the positive amount combination C
If there is no, as in the case of the A-unit, the process proceeds to step N9, where the B-unit of the B-unit switches its own main flag to the low level L and the microcomputer Am of the A-unit.
A flag switching signal is output to the microcomputer Am of the No. A machine so that the main flag is switched to the high level H. Accordingly, the B-unit proceeds to the next step N10 and enters the recovery mode in FIG. 6, while the A-unit performs the combined discharge by performing the operation in the steady mode in FIG. 3 as described above. Steps N10 to N1 in the recovery mode of Unit B in FIG.
The recovery operation of No. 9 is similar to the recovery operation of Steps S10 to S19 of the A-th car, and the description thereof will be omitted.

As described above, in the present combined-type combination weighing device, in the steady state where the two combination weighing devices A and B can be combined and discharged, one of the combination weighing devices A or B performs combination discharge. In the one-lung state where only one combination weighing device A or B is capable of combined ejection, the other combination weighing device B or A is caused to perform a recovery operation, and the combination weighing device B or A that cannot perform combination ejection is performed. By causing the combination weighing device A or B capable of performing combination discharge to perform combination discharge, in the steady state and the one-lung state,
The cycle time of combined discharge is set to be the same. Therefore, even if one of the combination weighing devices A or B becomes unable to be discharged, the other combination weighing device B or A discharges the same, so that the positive amount combination can be performed with a constant cycle time and without dropout. C can be supplied.

Further, in the present combined type combination weighing device, it is only necessary to add mutual communication software to each of the two combination weighing devices A and B, so that the software design is easy.

In the above embodiment, the case where there is no positive quantity combination C has been described as an example. However, each combination weighing apparatus A, B is provided with a sensor or the like, and each combination weighing apparatus A, B
May be switched between the combination discharge operation and the recovery operation when the abnormality is detected.

In the above-described embodiment, the recovery operation is automatically performed. However, in the present invention, it is sufficient to automatically perform only the switching of the discharging operation. The operator may manually perform the recovery operation for maintaining the state in which the can be discharged.

Further, in the above-described embodiment, the discharge operation is switched to the other combination weighing device B or A only when one of the combination weighing devices A or B becomes unable to discharge. However, in the present invention, in addition to the above case, when the combination discharge is performed a predetermined number of times, the discharge operation unit may be switched even if the discharge is not disabled. For example, in a steady state in which both machines A and B can discharge the positive quantity combination C, that is, while the positive quantity combination C is stocked in both timing hoppers 1A and 1B, the positive quantity combination C The discharge may be alternately discharged from both units A and B to the packaging machine P. That is, in the present invention,
"Discharge downstream from only one of the combination weighing devices" means that both machines A and B can discharge the positive amount combination C when both receive the timing signal from the packaging machine P. Means to be discharged from

In the above embodiment, the supply chute 1
Although the timing hoppers 1A and 1B are provided upstream of 0, the timing hoppers 1A and 1B are not necessarily required. Further, in the above-described embodiment, the same configuration is adopted such that the number of the weighing hoppers 6 _i of the two combined weighing devices A and B is the same, but the number of the weighing hoppers 6 _i of the A-unit is changed to the weighing hopper of the B-unit. such as more than the number of 6 _i, may be different from the structure of both Unit a, B.

[0030] In the present invention, but are not limited to the sequence of the weighing hoppers 6 _i, as in each unit A, the weighing hoppers 6 _i to example 7 of the B (a), linearly in two rows They can be arranged or, as shown in FIG. 7B, can be arranged on a semicircle.

[0031]

As described above, according to the present invention,
Since the combined objects to be weighed are discharged downstream from only one of the two combination weighing devices, even if one of the combination weighing devices becomes unable to discharge, the combination discharge from the other combination weighing device may not be performed. It is possible to recover the combination weighing device that has become unable to discharge, so that the allowable range of combinations can be adjusted at a constant discharge pitch (cycle time).
In addition, it can be supplied without any dropout.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a combined type combination weighing device of the present invention.

FIG. 2 is a conceptual diagram illustrating a relationship between two control devices.

FIG. 3 is a flowchart showing a normal mode of the A-unit.

FIG. 4 is a flowchart illustrating a recovery mode of the A-unit.

FIG. 5 is a flowchart showing a normal mode of the No. B machine.

FIG. 6 is a flowchart illustrating a recovery mode of the B-unit.

FIG. 7 is a layout diagram showing an arrangement of weighing hoppers.

FIG. 8 is a schematic configuration diagram showing a general combination weighing device.

[Explanation of symbols]

 A, B: Combination weighing device 6i: Weighing hopper

Claims (4)

[Claims] 1. A combined type combination weighing apparatus provided with two combination weighing apparatuses for performing combined discharge based on values measured by a plurality of weighing hoppers, wherein a combined object to be weighed is placed on one of the combination weighing apparatuses. A combined combination weighing device characterized in that only one of them is discharged downstream. 2. A combined type combination weighing apparatus provided with two combination weighing apparatuses for performing combined discharge based on values measured by a plurality of weighing hoppers, wherein the two combination weighing apparatuses are maintained in a combined dischargeable state. Meanwhile, the object to be weighed is discharged downstream from only one combination weighing device, and when the combination weighing device becomes unable to discharge, the discharging operation is immediately switched to the other combination weighing device. Complex combination weighing device. 3. A combined type combination weighing apparatus provided with two combination weighing apparatuses for performing combined discharge based on values measured by a plurality of weighing hoppers, wherein in a steady state where the two combination weighing apparatuses can perform combined discharge, Instructs one combination weighing device to perform combination discharge and makes the other combination weighing device stand by. In a single-lung state where only one combination weighing device can perform combination discharge, a recovery operation is performed for a combination weighing device that cannot perform combination discharge. A combined type combination weighing device, wherein the combination weighing device capable of performing the combination discharge is made to perform the combination discharge. 4. A combined combination weighing apparatus provided with two combination weighing apparatuses for performing combined discharge based on values weighed by a plurality of weighing hoppers, wherein one of the combination weighing apparatuses performing the combined discharge is within an allowable range. When the combination cannot be selected, the other combination weighing device starts combination discharge and performs a recovery operation so that the one combination weighing device can perform combination discharge. .