JPS6232325A - Weighing device - Google Patents

Abstract

PURPOSE:To weigh quickly and with high accuracy by combining most suitably master and slave weighing machines in accordance with whether a set target weight is large or small. CONSTITUTION:The titled device is provided with one set or plural sets of master weighing machines 1 for weighing an object to be weighed of a roughly prescribed quantity with respect to a set target weight, and plural sets of slave weighing machines 2 for weighing a short portion against the set target weight. Also, in accordance with whether the set target weight is large or small, a combination of the weighting machine 1 and the weighing machine 2 is selected automatically. That is to say, when the set target weight is small, only the weighing machine 2 is selected, and when the set weight is large, the weighing machine 1 and the weighing machine 2 are selected. Also, a combined operation is executed by weight from the weighing machine 2 by setting the short portion as a combined target weight, and one combination which is equal to the combined target weight or the nearest to this weight in an allowable range is derived as a correct quantity combination. In such a state, the object to be weighed which is discharged from the weighing machine 1 and the weighing machine 2 corresponding to the correct quantity combination is transferred to a distributing hopper 9 by a bucket conveyor 8, supplied at the time of the correct quantity against the set target weight, and removed at the time of failure.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a weighing device for weighing long objects to be weighed, such as dried noodles.

(Prior art) In order to package and take out dried noodles such as soumen and hiyamugi in predetermined weights, conventionally a master weighing machine that supplies about 90% of the target weight and a sub-weighing machine that supplies the remainder are used. A muzzleloader with a meter was used.

In this case, multiple slave weighing machines are arranged, and the weight obtained by the slave weighing machines is combined and calculated to supply the shortfall in the target weight obtained by the five current weighing machines, resulting in accurate weighing. It is configured to do the following.

(Problems to be Solved by the Invention) Since a current total @ machine and a slave weighing machine are used, 1) When the set value of the target weight is changed, quick and accurate weighing may not be possible. Ta.

In other words, when the target weight changes step by step from small to large, it is possible to automatically select the optimum combination of the master weighing machine and slave weighing machine to perform quick and accurate weighing. It had not been implemented.

Therefore, the present invention aims to solve the problems of the prior art.

(Means for Solving the Problem) The present invention provides one or more master weighing machines that weigh a predetermined amount of objects to be weighed relative to a set target weight, and a plurality of master weighing machines that weigh the shortfall from the set target weight. Equipped with a secondary weighing machine,
” - Perform a combination calculation using the weight from the sub-weighing machine with the missing part as the combined target weight, and find a combination that is equal to the combined target @ amount or closest to it within the allowable range as the correct amount combination, In the weighing device that supplies the weighing items discharged from the master weighing machine and the slave weighing machine corresponding to the above-mentioned exact weight combination to the packaging machine, the combination of the current μ machine and the slave scale φ machine is adjusted according to the size of the set target weight. It is characterized by automatic selection, and in more detail, the setting [When the weight per bar is small, only the slave weighing machine is selected, and when the set weight is large, the design f! The above problems of the prior art are solved by providing a weighing device that is characterized in that it selects between the weighing machine and the sub-meter μ machine.

(Function) In a weighing device that uses a plurality of master weighing machines and a plurality of slave weighing machines, the present invention automatically adjusts the balance between the master weighing machine and the slave weighing machines according to the size of a set target weight. Select a combination.

Therefore, the optimum parent and child weighing machines are selected according to the set target weight, and quick and accurate weighing can be performed.

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic layout diagram of the present invention. In FIG. The objects are supplied to the parent pool hoppers 3a, 3b. And this parent pool hopper 3a.

3b game)3. ．． 32 is opened and the parent weighing hopper la,
A long object to be weighed is supplied to the lb. As will be described later, this parent shutter can also be moved in the horizontal direction of the arrow in order to change the shutter width.

The master weighing 411 includes one master weighing hoover and one not shown.
The main weighing hopper 1a is composed of two weight sensors, etc.
The object ma or mb weighed by the master weighing machine I having a master weighing machine 1 having a master weighing hopper lb is discharged into a packet 7 and transported by a packet conveyor 8. A plurality of child feeding devices B', for example, five child feeding devices B', are arranged downstream of the parent feeding device A° in the direction of arrow movement of the packet conveyor 8. Each child feeder B' has child shutters α and β that move up and down.
, and supplies the long object to be weighed to the child pool hopper 4.

The secondary pool hopper 4 supplies a secondary weighing machine 2 consisting of a weighing machine 4a, one weight sensor (not shown), and the like. As will be described later, when the set target weight is 10100 (~150 (g)), one master weigher R1 detects the weight of the object to be weighed that is supplied in a predetermined amount approximately to the set target weight, and The shortage in terms of weight is multiple units, for example 10 sub-engines 2.
The items to be weighed from the secondary weighing hoppers 5 of the secondary weighing machines in the optimal combination are discharged to the timing hopper 6, and the items weighed by the master weighing machine 1 and discharged into the packet 7 are then weighed, for example. Thing ma is timing hopper 6
When the machine is moved to the position, the timing hopper 6 is opened to discharge the weighed object from the slave sewing machine 2 into a packet 7.

The object to be weighed is further transferred to the sorting hopper 9 by the conveyor 8, and when the object to be weighed in the packet 7 is the correct amount with respect to the set target weight, the correct amount gate 9a is opened.
It is supplied to the packaging machine IO, where it undergoes predetermined packaging processing.

When it is defective, the defective gate 9b is opened and the weighed object in the packet is determined to be defective. FIG. 2 is a schematic block diagram of the present invention.

Next, this block diagram will be explained with reference to FIG. For example, signals from the arithmetic control section 16 composed of a microcomputer etc.
, βb is activated, and the object to be weighed is supplied to the group pool hoppers 3a, 3b. Next, the main gate drive section 3' is energized by a signal from the calculation control section 16, and the gates 31+32 of the group pool hoppers 3a and 3b are opened to supply the object to be weighed to the main weighing hopper, where the object is weighed. When the timing signal from the packaging machine 1O is sent to the calculation control unit 16, the weight from the master weighing machine 1 is inputted to the calculation control unit 16 through the multiplexer 14 and the A/D converter 15, and is stored in a predetermined location in the memory. stored in the area. Further, a switching signal is output from the arithmetic control section 16 to the multiplexer 14, and the weights from the slave weighing machines 2 are sequentially taken out from the multiplexer 14, inputted to the arithmetic control section 16 through the A/D converter 15, and stored in a predetermined area of the memory. be remembered. The arithmetic control section 16 calculates the combination target type (■) of the machine 2 for the slave weighing machine 2 based on the setting [] mark price set by the target weight setting section 18 and the weight from the current total weighing machine I, and Execute the combination calculation using the weight from
Combine the mark and the weight [perform the combination calculation using the weight from the submeter ψ machine 2 as one mark weight. In addition, the upper limit weight setting section 1
7 has a deviation of the upper limit@amount from the set target weight set in advance. For example, if the set target it is 500 g and you want to set the L limit weight to 505 g, the deviation of 5 g is set in the high limit weight setting section 17. Set it.

In the arithmetic control unit 16, a deviation is input in advance to the -L limit weight from the -h limit i1J setting unit 17, and when the combination it is greater than or equal to the combination target listing, the deviation from this target type μ is within the deviation of the upper limit t. A combination equal to or closest to the target combination amount is selected as a combination for one time. When selecting the correct weight combination at this time, check the same and
If machine 2 is selected for both of the two sub-meters that are a pair that supplies material from the child pool hopper to the meter, the child-measurement machines that are in this pair are selected as a combination. Among the remaining slave weighing machines 2 that are excluded from the calculation, both of the two slave weighing machines 2 in a pair do not participate in the combination calculation, that is, there is no duplication. In addition, in the previous weighing, 2
If there is no slave weighing machine in which two slave weighing machines 2 are both selected as a positive weight combination, in this combination calculation, the two slave weighing machines 2 in each pair will be combined in the Kaneko weighing machine. There is no duplication, which does not participate in the combined operation, and bare doubling, in which only two slave weighing machines in a pair participate together in the combination calculation.

This is because the zero point adjustment is performed on one of the secondary weighing machines for double discharge, so that the zero point adjustment can be performed on the average for the Kaneko weighing machines without being concentrated on a particular weighing machine. When a correct amount combination is determined, the items to be weighed are discharged from the slave weighing machine 2 selected for that combination and put into the timing hopper 6, and the packets are weighed by the master weighing machine and transferred by the packet conveyor 8. The position of 7 is determined by timing, and a signal is sent to the timing hopper drive unit 6'.
The object to be weighed is discharged from the timing hopper 6 into a packet 7.

The object to be weighed in the packet 7 is put into the sorting hopper 9, and if the object to be weighed in the packet 7 is the correct amount, a signal to open the correct amount gate 9a is sent from the arithmetic control section 16 to the sorting hopper drive section 9'. If it is defective, a signal to open the defective gate 9b is sent from the arithmetic control section 16 to the sorting hopper drive section 9'. The weighed objects discharged from the correct weight gate 9a are subjected to predetermined packaging processing by the packaging machine 10, and the weighed objects discharged from the defective gate 9b are again sent to the parent feeding device A' or the child feeding device B.
Measures will be taken, such as reverting to ``.

Note that the conveyor drive section 8' intermittently transports the packet conveyor 8 at a predetermined speed based on a signal from the arithmetic control section 16.

FIG. 3 is an explanatory diagram of the outline of the memory within the arithmetic control section 1a. Figure 3 (a) shows the parent weight memory PM that stores the weight of the parent weighing machine l, and the parent weighing machine 7+, pa! 1+
I-) / IA F is provided with an area PM for storing the weight of the object to be weighed and an area PM2 for storing the weight of the object to be weighed that was previously discharged. Third
Figure (b) shows a correct/incorrect flag memory FM that stores whether a combination of correct amounts for one combination of target weights was obtained by the combination calculation by the slave weighing machine 2, or whether the combination was defective.

Area FM1 for storing the correct quantity and defective quantity of the objects to be weighed discharged from the timing hopper 6, and area FM2 for storing whether the quantity to be weighed in each packet 7 transferred by the packet conveyor 8 is correct or defective. , FM5e-@φ, and an area FMm for storing the correct amount and defective amount of objects to be weighed to be fed into the sorting hopper 9. Figure 3 (c)
, (D) is the discharge number counter memory of the secondary weighing machine 2, FIG. These are parent supply amount change flags, which will be explained in detail later.

FIG. 4 is a flowchart of the weighing cycle of the weighing device of the present invention. Next, the operation of the present invention will be explained using this flowchart.

(1) When it is confirmed that there is a timing signal from the packaging machine IO (step P1), the process moves to main stitch amount processing (step P2).

(2) Next, the weight of each child weighing a2 is sequentially input into an area of the memory (not shown) and stored (Step P4
), the arithmetic control unit 16 calculates the combination target upper value of the slave spear machine 2 from the set target weight set by the target weight setting unit 18.
It is obtained by subtracting the weight stored in the parent weight memory PM2, that is, the weight discharged from the parent weighing machine 1 last time (Step P5).

However, as described later, for example, if the set target weight is lOloo
(If the value is less than 1, the value stored in the parent ffi amount memory PM2 is zero because no discharge was made from the previous master balance machine 1. Therefore, the set target weight becomes the combined target weight.) Next, the presence or absence of previous double discharge That is, it is checked whether objects to be weighed have been discharged from the paired slave weighing machines 2 of the slave weighing machines (step Ps), if there was no duplicate discharge last time.

For all slave weighing machines 2, two weighing machines 2 in each pair perform a combination operation without duplication in which both weighing machines 2 do not participate in the combination operation, and a combination operation in which only one pair of slave weighing machines 2 participate in the combination operation. Perform combinatorial calculations with one pair that participates in
Find a combination (correct combination) that is equal to or closest to the target combination weight and is equal to or greater than the target combination weight and within the upper limit weight deviation (step P7). If there is a duplicate discharge from the previous time,
Sub-counts other than the previous duplicate pair! At 4112, perform combination calculations without duplication to find one combination (correct combination) that is equal to or closest to the combination target weight, which is greater than or equal to the combination target weight and within l limit weight deviation (step 2). Check whether the supply amount change flag is rHJ (step P9). At this stage, the parent supply amount has not been changed yet, so proceed to step Plo and check whether the correct amount combination has been obtained (step PIO )・ (3) If a positive combination is found, the selected child is given (
Step Ptt), followed by the discharge number counter C1
is incremented by 1 (step Pl 2 ) eNext, check whether the value of the counter C1 has reached a predetermined number, for example, 6 times (step P15), and repeat the following processes described below until the predetermined number of times is reached (step P15). When the value of the counter C1 reaches a predetermined value, the following calculation is performed (step P14), namely, DM/C1, which is the value of the cumulative number of discharger weighing machines DM divided by the count number of the counter memory C1. The value of is within a predetermined range, for example 3.2 to 3.
Determine whether it is within the range of 8. Here, DM/
The reason for selecting the value of C between 3.2 and 3.8 is that, for example, when there are 10 slave weighing machines 2 and a combination calculation is performed with no overlap and 1 bear overlap, the maximum number of units that can be discharged is 5. This is because it is known from experience that the combination accuracy is best when discharge is performed using 3 to 4 units, which is approximately 1/2 of that number. Therefore, in step P14, it is checked whether to select the average discharge for a predetermined number of times, for example, 6 times.If the value of DM/C1 is 3.2 to 3
．． If it is within the range of 8, the counter C1 and the cumulative memory D
Clear M to zero (step P+s), proceed to mouth, D
If the value of M/C is 3.2 or less, the average number of slave weighing machines 2 selected is small, so a signal to narrow the master shutter width of the master supply device A° is sent to the master shutter width change drive unit. 1
3 (step P17), for example, the current shutter αa
The supply amount is reduced by one pitch between and αb and between βa and βb, and the number of selected sub-weighers la2 is increased, the parent supply amount change flag BM is set to "Hj, and the number of discharges is Clear counter memory C2 to zero.Here,
The discharge counter memory c2 is a memory for counting the number of discharges until the weighed object in the parent pool hopper and current value hopper of the shutter width change weight is discharged. I) M/Cl
If the value of
to clear counter C2 to zero (step 2
1 day).

(4) In step P9, the change flag BM is set to [''L
When it is confirmed that the number is 1, and that the process of step Pl+3 has been completed, the counter memory C2 is incremented by 1 increment (step P19), and it is checked whether the counter memory C2 has reached 4. (Step P20) - This is until the objects to be weighed in the parent pool hoppers 3a, 3b and the current weighing hoppers la, lb, which have already been supplied and loaded with the shutter width before the change, are completely discharged (11[
] This is to avoid adding or storing data in the cumulative memory DM (up to the 44th time). When the value of the counter memory C2 reaches 4, the counter C1 and the cumulative memory DM are cleared to zero (step P2L), and the change flag BM is set to "L".
(Step P22). (5) For the following processes, first check whether there was any duplicate discharge from the previous time (Step P25), and if there was any duplicate discharge from the previous time, the slave soaking machine 2 on the non-input side of the pair is (In one weighing cycle, the weighing object is only fed into the weighing hopper of one of the two slave scales 2 of the machine, and the weight of the other slave scale (The hopper is empty.) Execute zero point adjustment (step P24), then shift the correct/incorrect flag memory FM by 1 (step P25), and set the correct/incorrect result of the combination operation. is stored in the memory area FM.
It is determined whether m is rHJ, that is, whether the object to be weighed in the sorting hopper is correct or defective (step P27), and FMm is rHJ.
If FMm is HJ, a positive gate open signal for the sorting hopper is output (step Pza), and if FMm is not rHJ, a defective gate open signal for the sorting hopper is outputted.

(Step P29) (6) Next, a timing hopper open signal is output (Step P3o), and if the discharge flag is set in Step P2, the current weighing machine that is set, that is, in Step P2, calculates the weight. Output the current weighing hopper open signal of the stored master work quantity 4111 (step P5r), and brush-2
Discharge the weighed object to the door. Next, an operation signal for the standard shutter, for example αb, corresponding to the current weighing machine l that has discharged the object to be weighed is outputted (step P52), and the parent shutter αb is moved down by one step, so that the weighing is carried out between the parent shutters αa and αb. Check whether the flag memory FM is ll'HJ (step P5!S) - If FMl is fLJI, there is a defect in the combination, and in this case the child weighing hopper is not opened and the current The packet 7 containing only the weighed items discharged from the weighing machine is intermittently transferred to the sorting hopper 9 every time a shift signal is input to the conveyor drive section 8'.
, when FMl is I'HJ, a positive combination has been obtained, so a slave weighing hopper open signal is output according to the positive combination (step P54), and the weighing object is discharged from the hopper to the timing hopper 6 in the slave scale. The parent boule hopper on the side corresponding to the current total ff1m1 that discharged the weighed object in the 0th order, e.g. 3
In step P35), the open signal of the gate a is output, and the object to be weighed is put into the current weighing hoch 1a from the parent pool hopper 3a. Next, a signal is output to shift the bucket comparer 8 by one step (step P55), and an opening signal is output for the gate 4a or gate 4b of the child pool hopper 4 on the side of the child weighing hopper that discharged the weighed object (step P57). , the object to be weighed is fed from the child pool hopper 4 to the child weighing hopper.

Furthermore, an operation signal is output for the secondary shutter β of the feeding device B° corresponding to the secondary pool hopper with the gate open (step 25), and the secondary shutter β is moved up and down to place the object to be weighed between the secondary shutters β and α. is supplied, and an operation signal of the child shutter α corresponding to the operated child shutter β is output (step Pg
9) The object to be weighed between the L shutters β and α is fed from the child feeding device B° to the pool hopper 4. Finally, the parent shutter αb or / that moved up and down in step P52 above is
and βb, to supply the object to be weighed between the parent shutters from the parent feeding device 21A' to the group pool hopper.Step P4
0), return to b.

FIG. 5 is a flowchart showing the parent weight processing procedure in Step P2 of 1.L. Next, this flowchart will be explained. In this example, the process is performed when changing the setting 11 standard weight WT in three stages: W<100.0(g) 100.0≦WT≦150.0(g) W>150.0 I will explain about it.

(1) Check whether the set target weight WT is less than 100.0 g (step S1), and if this condition is satisfied, shift the master weight memory PM and discharge the weighed object from the current weighing hopper. The memory area PMX that stores the weight of is cleared (step S2).

Next, the discharge flag of each weighing machine is reset (step S3), thereby prohibiting the opening operation of the weighing hopper of the weighing machine, and further prohibiting the opening operation of the group pool hopper and the operation of the parent shutter. and ensure that only the secondary weighing machine is used for weighing. Therefore, in this case, in step P5 of FIG. 4, the set target weight wr is calculated as the combined target weight.

(2) If the condition of the set target weight W in step S1 is not satisfied, then in step S4
If this condition judgment is satisfied, that is, 100.0≦WT≦150.0, the memory PM is shifted and the memory area PM
1 is cleared (step S5). Next, it is checked whether the current weighing machine participates in the current weighing (step Ss). If both current weighing machines do not participate in the weighing, i.e.
If the weighing participation switches (not shown) corresponding to both current weighing machines are both OFF, the memory area PM is cleared and the discharge flag of each current weighing machine is reset (step S7). Opening of the weighing hoppers of both current weighing machines is prohibited, and weighing is performed only by the slave weighing machine. The weighing participation switch mentioned above is provided for each weighing machine, and normally when all the weighing participation switches are turned ON, the weighing participation switch corresponding to that weighing machine is turned OFF.
Leave it in FF.

(3) When only one current weighing machine participates in weighing, that is,
The weighing participation switch corresponding to one of the current TMs is ON.
In this case, input the weight of the participating current weighing machine into the memory area PM and store it (step 3), and set the discharge flag of the current weighing machine participating in the counting U (step S9).
).

(4) When both current weighing machines participate in weighing, that is, the weighing participation SW and H corresponding to both current weighing machines are both ON.
In this case, use the current weighing machine alternately. For this reason, first, the current measurement machine 1 having the current measurement hopper 1a from the previous weighing is
Check if you used step 5lo),
If NO, the current weighing machine l having the current weighing hopper la will participate in the current weighing, and the weight will be stored in the memory area PM.
.

(Step 5t-t) *Next, set the discharge flag of the current weighing machine 1 having the current weighing hopper 1 &
Stay, Bu S L 2) Total h for etii measurements
If the parent weighing machine l with 1 hopper la participates, the current weighing machine l with the current weighing hopper 1b will participate in the current weighing.
Since the current weighing hopper lb participates in the current weighing at
Step 5: Store the weight ψ of mi in memory area PM1.
15) Set the discharge flag of the current weighing machine 1 having the current weighing hopper lb (step Sr 4 ) *(5) If the condition determination in step S4 is NO, that is, the set target weight is W>150.0 If so, shift the memory PM and clear the memory area PM1 (step 515).
) 11 Next, check whether the current weighing machine participates in the current weighing. Step 5la) If both current weighing machines do not participate in the current weighing, that is, both current weighing machines correspond. If both weighing participation switches are OFF, clear the memory area PM and reset the discharge flag of each current weighing machine (step 517) +1 (6) If any current weighing machine participates in the current weighing. In other words, if the weighing participation switches corresponding to both current weighing machines are both ON,
The sum of the weights of each weighing machine is stored in the memory area PM (step S).Next, the discharge flag for each weighing machine 111Ja is set (step 519).

In addition, when only one of the current weighing machines participates in weighing, that is, when the weighing participation switch corresponding to either of the current weighing machines is ON, the t amount of the participating current weighing machine is stored in the memory area PM, Enter and store (step 520) -
Next, the discharge flag of the weighing machine participating in the weighing is set (step 521). One or more current weighing machines that weigh a fixed amount of objects and multiple sub-weighing machines that weigh the shortfall from the set target weight are used together, and the system is automatically optimized according to the size of the set target weight. Since weighing is performed using a combination of parent and child weighing machines, quick and accurate weighing can be carried out.

[Brief explanation of the drawing]

FIG. 1 is a schematic layout diagram of the present invention, FIG. 2 is a schematic block diagram of the present invention, FIG. 3 is an explanatory diagram of the memory, and FIGS.
The figure is a flowchart. Engineering...Current weighing machine, 2...Sub weighing machine, 3a, 3b...
・Parent pool hopper, 3゛...Parent gate drive section, 4...
- Child pool hopper, 4'... Child gate drive section, 5...
・Sub weighing hopper, 6...Timing hopper, 6'...
・Timing hopper drive unit, 7...Packet, 8...
・Packet conveyor, 8゛...Conveyor drive unit, 9・
... Sorting hopper, 9'... Sorting hopper drive section, 10.
... Packaging machine, 11... Group shutter drive unit, 12...
Child shutter drive unit, 13... Group shutter width changing drive unit, 14... Multiplexer, 15... A/D converter, 16... Arithmetic control unit, 17... Upper limit weight setting unit,
18...Target weight setting section. Patent applicant: Ishida Koki Seisakusho Co., Ltd. Representative: Minoru Tsuji, patent attorney Figure 3 (to) -1 Parent supply Yabusara Fuzo diagram (Part 3)

Claims (3)

[Claims] (1) Equipped with one or more master weighing machines that weigh approximately a predetermined amount of objects relative to the set target weight, and a plurality of slave weighing machines that weigh the shortfall from the set target weight, and the above-mentioned The shortage is used as the combined target weight, and a combination calculation is performed using the weight from the slave weighing machine, and one set that is equal to the combined target weight or closest to it within the allowable range is determined as the correct weight combination, and then the master weighing machine And in a weighing device that supplies weighed items discharged from slave weighing machines corresponding to the above-mentioned exact weight combination to a packaging machine, a combination of a master weighing machine and a slave weighing machine is automatically selected according to the size of the set target weight. A measuring device characterized by: (2) When the set target weight is small, only a plurality of slave weighing machines are selected and the set target weight is combined and weighed as the target weight. Weighing device. (3) When the set target weight is large, one or more master weighing machines and a plurality of slave weighing machines are selected for weighing. Weighing device as described.