JPH01229914A - Combined measuring device - Google Patents

Abstract

PURPOSE:To enable parallel transmission with a small number of data lines or serial transmission in a short time, by providing a deviation amount sending section and a correcting section, etc. CONSTITUTION:A selecting section 42b sends out a selected and operated result to a deviation amount sending section 45b and, at the same time, it sends out a selecting signal to a discharge supplying section 44b. The discharge supplying section 44b sends out a discharging signal to the sending section 45b when an object to be measured is discharged from a measuring hopper. The sending section 45b consists of a subtractor 46b which subtracts the set amount of a set amount memory 43b from the combined calculating result of the selecting section 42b and a data transmitting part 47b which serially transmits the result of the subtraction in the subtractor 46b as a deviation data every time the discharging signal is inputted thereto from the supplying section 44b. Meanwhile, a correcting section 48b consists of a data receiving part 49b, and an adder 50b which adds a preset amount which is a reference of the measuring device set by a reference setting means 51b and then generates the result to the set amount memory 43b as a set amount for correction. The memory 43b starts memorizing the set amount for correction after the transmission of the transmitting part 47b is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Application Field of the Present Invention The present invention relates to a combination weighing device that combines objects to be weighed discharged from a plurality of weighing units 1 on a conveyor and carries them out.

<Prior Art> (Figs. 5 and 6) A combination meter I device has been used in the past to efficiently pack and package objects to be weighed, which individually vary in weight, into a predetermined amount.

This type of weighing device is configured to perform a combination f4 of the measured values of objects to be weighed weighed by a plurality of weighing sections, and to collectively discharge objects to be weighed that are close to a predetermined set amount.

However, in recent years, there has been an increasing demand from users to use such weighing devices to combine not only interpolated objects to be weighed but also different types of objects to be weighed together with high precision and efficiency.

In order to solve this problem, it is necessary to significantly increase the number of measuring units, but - FJ in total! Significantly increasing the number of weighing sections in the device would make the device huge and disadvantageous;
are arranged along the transport conveyor, and the weighed objects discharged from the weighing section in the previous stage are sequentially added to the objects to be weighed discharged from the weighing section in the latter stage, and then the weighing objects are discharged from the weighing section 11 in the latter stage. Combination weighing devices have existed for some time.

In such a weighing device, all the weighing machines discharge the objects to be weighed almost in synchronization with the intermittent lIp feeding of the transport conveyor, so one mixed product cannot be carried out at the operating speed of each weighing machine. , high-speed operation is possible.

In addition, since it is a method in which the items from the four hangers in the rear stage are sequentially added to the weight discharged by the weighing machine in the former stage, the results of weighing and discharging in the former stage are used for weighing in the latter stage. Can be corrected with high accuracy! ? It has the advantage of being able to perform precise measurements.

As a method for this correction, the conventional method is to suspend three types of objects A, B, and C, weighing 90, 100, and 110 grams each, to produce a mixed product with a total weight of 300 grams. To explain the case of carrying out a sample, as shown in Fig. 5, the settings of weighing ^1, 2, and 3 are set to 90, 190, and 300 grams, respectively.

At weighing b'l 1, the 1 occupied object A is weighed, the object weighing close to 90 grams is discharged, and the amount W1 of the object actually discharged is sent to the weighing machine 2 at the subsequent stage.

In the weighing machine 2, as shown in FIG.
The discharge amount W1 is stored in the storage section 4, and the weighing selection section 5 adds this discharge amount W1 to discharge the object B that is close to the setting ff1190 set in the setting section 6.

The discharge amount W2 of the object to be weighed B actually discharged by the weighing machine 2 is added to the discharge amount W1 of the previous stage in the adder 7, and then sent to the weighing machine 3 of the subsequent stage.

Similarly, in weighing machine 3, by adding this additional discharge amount W1 + W2, the object C to be weighed, which is close to 300 grams, is calculated (outflow (discharge amount W3))
I will do it.

In this way, the subsequent weighing correction is performed sequentially based on the IT suspension result of the first weighing □, and the mixed product can be carried out with high precision.

Problems to be Solved by the Present Invention> However, in the combination weighing device that performs the above-mentioned correction, the discharge amount of the object to be weighed (for example, 91.5 grams) discharged in the weighing H is directly used as data in the subsequent stage. There is a problem in that there is a large number of single-stage suspensions because the output is sent to the first stage, and furthermore, there is an increase in the number of suspensions on the downstream side.

This means that when data is transmitted in parallel, the number of data lines increases.

Furthermore, in the case of serial transmission, the transmission time becomes long.

In addition, whichever transmission method is used, a large number of bits ff1 (bits) are required to store the discharge amount f-t.

The object of this invention is to provide a rough adjustment weighing device that solves this problem.

Means for Solving the Problems> In order to solve the problems described above, in the combination weighing device of the fifth aspect, the actual discharge amount of the object to be weighed discharged from the previous stage weighing n to the transport conveyor and its It is provided with a deviation amount output means for calculating the difference from a set amount of a total of ifi fish and outputting the calculated value as deviation data, and a correction means for correcting the setting position of the subsequent weighing machine based on the deviation data.

<Operation> Therefore, the wave meter ffi is calculated based on the set amount in the previous stage measurement □.
When the object is discharged, the deviation amount output means outputs the difference between the set position and the actual discharge amount as a deviation f-ta to the correction means.

The correction means receives this deviation data and corrects the setting position of the subsequent weighing machine. As a result, the object to be weighed which was weighed in the first stage and discharged from the first stage is combined with the object to be weighed which is discharged from the second stage weighing machine based on this corrected setting position.

Embodiments of the present invention> (Figures 1 and 2) An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a schematic diagram showing an n@ section of a combination weighing device according to an embodiment.

In the figure, reference numerals 10, 20, and 30 indicate a combined weighing machine that is vertically arranged so as to straddle the conveyor 38.

These weighing machines are constructed almost identically (1-J5), and feed different types of objects A, B, and C to be weighed, which are supplied from supply conveyors 8 disposed above each one, to an umbrella-shaped circular feeder 11.
．． 21.31 and annularly arranged radial feeders 12.22.32 and intermediate hoppers 13.23.
33 to the metering hopper 14.24.34.

The weighing hoppers 14, 24, and 34 each have a weighing device 15.
．． 25.35 are directly connected to each other, and each Δ is combined with the measured values to select an object to be weighed that is close to (or equal to) the respective set amount, and the selected objects to be weighed are sent to the collection chute 16. 1- on conveyor 38 via 26.36
Let Ray 39 discharge it.

J5, this transport conveyor 38 performs 9j operations at a transport pitch equal to the interval between each measurement 1, and sends out a discharge request signal for each measurement n every time the tray 39 reaches the discharge position of each weighing machine.

The measurement selection U operation of the total ff1ttll is the total ff1ta connected by the serial transmission line as shown in Figure 3.
This is performed by the control units 40a, 40b, and 40c for each meter, but since these are configured the same, the measurement [20
Only the control unit 40b will be explained (hereinafter, figures with symbols a and C added to the figure numbers are equivalent to those with the same figure numbers in FIG. 3).

In FIG. 2, 41bl, tlffl conveyor 38
Each time a discharge request signal is received from the combination calculation unit 41b, the combination calculation unit 42b performs a combination calculation based on the measured value signal from each measuring device 25. - A selection unit that selects calculation results that are within a predetermined tolerance with respect to the set amount stored in the subject device 43b.

This selection section 42b sends the selected calculation result to a deviation amount sending section 45b, which will be described later, and also outputs a selection signal to the discharge supply section 44b.

The discharge supply section 44b supplies the weighing hopper 2 corresponding to the selection signal.
The object to be weighed in 4 is discharged, the empty weighing hopper is supplied with a new object to be weighed from the intermediate hopper, and the empty intermediate hopper is further supplied with the object to be weighed from the radiation feeder.

Note that the discharge supply section 44b sends a discharge signal to the leakage amount sending section 45b when the object to be weighed is discharged from the weighing hopper.

The deviation amount sending section 45b receives input of a subtractor 46b that subtracts the set amount of the set amount storage 43b from the combination calculation result (actual ejection layer) from the selection section 42b, and the discharge signal from the discharge supply section 44b. a data transmitter 47b that serially transmits the attenuation result from the subtracter 46b as deviation data each time
It is composed of.

48b is a correction unit that receives deviation data from the weighing scale 10 and corrects the set amount.

The correction unit 48b includes a data receiving unit 49b that receives and stores deviation data serially transmitted from the control unit 40a, and a data receiving unit 49b that receives and stores deviation data serially transmitted from the control unit 40a, and a data receiving unit 49b that receives and stores deviation data serially transmitted from the control unit 40a, and a data receiving unit 49b that receives and stores deviation data serially transmitted from the control unit 40a, and a data receiving unit 49b that receives and stores deviation data serially transmitted from the control unit 40a, and a data receiving unit 49b that receives and stores deviation data serially transmitted from the control unit 40a. The set amount (reference setter) serving as a reference is used as a side frame, and the adder 50b records and rewrites the addition result in the set amount memory 43b as a corrected set amount.

The correction setting amount is stored in the setting amount storage device 43b as follows.
This is performed after the data transmission section 47b completes transmission.

Note that the control units 40a and 40c of the other weighing machines 10.30 are configured in the same way, but in the control unit 40a of the weighing machine 10, the correction unit 48a is configured so that the input deviation data is always used as a reference. The control section 40c of the metering unit 130 is set such that the operation of the deviation amount sending section 45C is always stopped.

Operation of the above embodiment> Next, the operation of the above embodiment will be explained.

It is assumed that objects to be weighed are supplied in advance to each hopper with a total of ff1ilO, 20, and 30, and objects to be weighed A,
In order to obtain a mixed product of 300 grams by combining 90, 100.110 grams of B and C, respectively, the controllers 40a and 4
It is assumed that the reference setters 51a, 51b, and 51c of 0b and 40c are each set to a value of 90.100.110.

Here, each i1 [1110, 2
When the J and Il output request signals shown in FIG. 3 are input to the control section 111 of the 0.30 in step 4, the combination selection operation by each flNJ control section is performed in synchronization with this. However, in this combination weighing and loading, the three types of mixed products are not put into the two 1 feed lays 39 located below the weighing 1120.30 at the start of operation, so the weighing item 1
0 will be explained first.

In the control unit 40a of the weighing F310, from 1 o'clock upon receiving the discharge request signal, for example, the object to be weighed with the calculation result A1 is selected by the selection unit 42a and discharged. The control unit 44a discharges the paper onto three trays.

The discharge amount A1 at the mouth is output to the deviation amount sending unit 45b, and the setting position of the setting memory 43a (in the case of the mouth, the discharge amount A1 is output from the deviation amount sending unit 45b).
90)) is reduced, and the result of this reduction is 4 deviation data DA
1, the data transmission unit 47aJ is serially transmitted.

This (1 difference data DA1 is
The data is received and stored in the data receiving section 49b of the reference FA (10
0) is added, and after data transmission (ancient capital 117b transmission is completed), the setting amount storage device 43b1.: is stored and set.

During this time, new hanging items 6 are supplied to each h1 hopper of each weighing machine 10, 20, and 30 and weighed.

+19 transport conveyor 38 was transported lIα, and at 1 o'clock the tray 39 (aluminum suspended object A
(who is an official) was moved under the weighing b120 and 2
Sometimes, the next discharge request signal is 6 total ffi[110,20
, 30.

For this reason, the control unit 40b of the weighing unit 120 sets
The correction setting amount (100+DA1) stored in the giant 43b
) is selected, and this concluding combination [3
The object to be weighed No. 1 is selected and placed in the tray 39 containing the object to be weighed A1.

Also, at this time, the discharge amount 81 and the set amount memory 4 are added as described above.
The deviation from the correction setting amount (100+DA1) stored in 3b is defined as data D[31 i! 11 control (serial transmission to 40C, received and stored by data receiving section 49c).

J3, in synchronization with this operation, the next object to be weighed A2 is thrown into the lay from the high weighing machine 10 to 1, and the distance difference f - DA is
2 will be received by the data receiving section 49b.

Similarly, to be measured '1171A1. 1 containing B1
~ When the ray 39 moves below the weighing unit 15130, the control unit 40c receives the deviation data D from the control unit 1211 unit 40b.
[Correction setting ai corrected by 31 (1104-D
Based on Bl), the combination of H1 hanging object C + 11 constant thickness is carried out, and the selected weighing object C1 is H1 hanging object A1,
B1 is stored and put into the stored tray 39.

The i-ray 39 into which the trainees'1llIJA1, B1, and C1 were placed like a mouth (Yo, the next tray 39, which was carried out in the next pupil transport and moved under the train'130, contains the trainees) Objects to be weighed A2, B2, and C2 are input.

Thereafter, in the same manner, different types of hanging dogs that have been corrected and weighed sequentially based on the bias data from the previous stage are placed on the tray 39 and are taken out.

d3, this seedling difference data covers the range of correction 6 for rough selection.
If it is 1.0 grams (0.1 grams 111th place), it can be composed of 5 bits including the positive and negative signs.

In addition, in this embodiment, only the deviation data is transmitted to the subsequent stage, but at the time of starting or ending the weighing operation, or when the adjustment close to the set position cannot be obtained, etc.
Smooth weighing operations can be achieved by sending and receiving flags to prevent unnecessary discharge of objects to be weighed from the latter-stage weighing machine, flags to prevent setting position correction, etc., added to this deviation data. Can be done.

Other Examples of Mitsuaki Kumoto〉 (Figure 4) Nayoj, the above-mentioned Example T-c, a total of 3 ff1e110.
20.30 is used to carry out a mixed product of three scales of suspended objects A, B, and C. However, this is not intended to limit the present invention, and the weighing scale 110.30 of the above embodiment is explained.
(including the control units 40a and 40c) may be connected after the U)II to obtain a mixture of two types of objects to be weighed, or the same type of objects to be weighed may be discharged from a total of 6 ff1ll to obtain a total of 11 units. (
It is also possible to carry out large quantities of products that cannot be discharged properly.

Furthermore, in the embodiment described above, the deviation data is sent to the later-stage weighing machines and the set amount is corrected sequentially for each weighing machine, but for example, the two former-stage weighing machines do not perform correction. Based on the deviation data from these two weighing machines, only the set amount of the final stage measurement n may be corrected, or the deviation data may be transmitted in parallel.

Further, in the above embodiment, the case where the conveyor 38 conveys at the same pitch as the interval between the weighing machines has been described, but it is also possible to arrange a large number of trays between the weighing areas and convey the trays at a small conveyance pitch. good. In this case, the number of deviation data corresponding to the number of trays between weighing items is sequentially stored in the data receiving section, or multiple correction setting amounts corrected using the deviation data are sequentially stored in the setting storage device. ,
The data may be output in the order in which it is stored.

In addition, in the embodiment described above, the "inclusion" of the object to be measured was selected based on the value obtained by adding the deviation data from the previous stage to the reference setting amount, but as shown in FIG. Combine data! J) in Uratsubu 41 and forced to join! Alternatively, as shown in FIG. 4(b), the deviation data is added to the dropping point results from the combination operator 41 using the adder 60 to select a combination based on the reference setting amount. Good too.

Effects of the present invention> In the combination weighing device of the present invention, the deviation amount of the discharge amount from the set amount of the first stage metering bowl is transmitted as data, and the second stage needle ff
Since the set amount is corrected for each l, the amount of data to be transmitted is much smaller than in the past, making it possible to perform parallel transmission using fewer data lines or serial transmission in a short time.

Furthermore, the number of memories required for storing the received deviation amounts is reduced, which is particularly effective when there are many 1-lays between measurement points.

[Brief explanation of the drawing]

FIG. 1 is a four-dimensional schematic diagram showing the mechanism of an embodiment of the present invention;
2 is a block diagram showing the control unit of the embodiment, FIG. 3 is a timing diagram showing the operation of the embodiment, and FIG. 4(a),
(b) is a block diagram showing only the main parts of another practical ff'a gate of the present invention. FIG. 5 is a schematic block diagram showing the configuration and operation of a conventional device;
FIG. 6 is a block diagram showing some details of FIG. 5. 10.20.30...Total ff1i, 38 ・
・・・・Transport conveyor, 39...Tray, 4
0a, 40b, 40C...Control unit, 45a, 4
5b, 45c... Deviation amount sending unit, 48a, 48
b, 48c... Correction section. Patent Applicant Anritsu Corporation Agent Patent Attorney ♀ Makoto Kawa Figure 6 Ward Dimensions

Claims (1)

[Scope of Claims] A plurality of weighing machines each discharging a predetermined amount of the object weighed by a weighing section are arranged along a conveyor, and the object to be weighed from the preceding weighing machine is discharged onto the conveyor. , in a combination weighing device configured to sequentially add and carry out the objects to be weighed discharged from the latter weighing machine, calculate the difference between the discharge amount of the former weighing machine and the set amount, and use the calculation result as deviation data. What is claimed is: 1. A combination weighing device comprising: a deviation amount output means for outputting a deviation amount; and a correction means for correcting a set amount of a subsequent weighing machine based on the deviation data.