JPH01260325A - Weighing system for mixture of multykind - Google Patents

Abstract

PURPOSE:To prevent cumulation of weighing errors in repeated weighing, by combining the objective value of a weight to be weighed before an arbitrary object to be weighed is weighed with the weight to be weighed of itself when said arbitrary object is weighed to set a weighing object before performing weighing. CONSTITUTION:A linear feeder 15 for feeding an object to be weighed and a part feeder 16 for supplying the object to be weighed are provided in a weighing apparatus and the object fed from the linear feeder 15 is directly received in a weighing cup 17. A load converter 18 is provided below the weighing cup 17. When the object is weighed by the load converter 18, the target value of a weight to be weighed before the object to be weighed is weighed is added to the weight to be weighed itself to set a weighing target.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel weighing method for mixing and weighing a plurality of objects to be weighed. In more detail, there is a circular table with an arbitrary number of measuring cups placed in the center, and multiple feeders for feeding weighed items around it! In a weighing system in which a parts feeder for supplying IL objects is arranged, this weighing method is characterized in that several types of objects are weighed individually, and then mixed and weighed without accumulating their respective errors.

The conventional mixing and measuring method will be explained based on an actual rotation example.

The configuration of the conventional mixing and weighing system is as shown in the IT diagram.
Six weighing devices 28 to 2F are arranged alternately on both sides of the packet conveyor 1, which is partitioned into multiple parts, and each weighs six different types of weighing items A, B, ..., F is inserted. Each measuring device fi
i28 to 2F are installed on the pedestal 3 as shown in Figure 2.
There is a linear feeder 4 for transporting materials, a pern feeder 5 for supplying materials to be weighed, and a weighing hopper 6 for receiving and weighing materials sent from the linear feeder 4. There is a load changer 7. Each weighing device only weighs a different total Ik'4'yJ.

With this weighing system, weighing items A-F are each 1.2 g.
, 1.0g, 0.8g, q, 7 ct, 0.6g, 0
．． A case will be explained in which a total of 4.89 products are made by weighing and mixing 5 g each.

Each weighing device 2A to 2F individually weighs the weight Ek of each weighing object (weighing object AI, 2 g, weighing object Bl, 0 to I, ..., weighing object FO, 5 ct), and all weighing When the weighing of the device is completed, each weighing hopper is opened, each weighing object is dropped onto the packet conveyor, and the packet conveyor sends only one pitch. Then, each weighing device starts its own weighing again.

Paying attention to the arbitrary packet in the weighing device @2A, the packet containing 1.2 g of the object A is sent to the weighing device 2B on the day of the object to be weighed, and the packet B is placed in the weighing device 2B. 1.09 was added, making the total of A and B 2.
Weighing device 2c for Ik object C with 0g of object to be weighed
be sent to. When this is repeated, this packet arrives at the weighing device @2F of weighing object F.
At the time when the weighed item F is added, all the weighed items A to F and 61 items are mixed, and a total of 4.8 g of product is completed.

However, with this method, the 8 objects to be weighed A-F are 31+ in total,
: There is a problem that the measurement errors in For example, if each of the weighing devices 28 to 2F has a weighing error of +0.1 g, when six types are mixed, the product will be 5.49, which is 0.69 more. Therefore, there is a problem that the total error increases as the number of mixtures increases.

In the present invention, as a result of extensive research aimed at preventing measurement errors from accumulating no matter how many types of objects to be mixed and weighed increase, this can be achieved using the method shown below.

The measuring method according to the present invention will be explained based on an example.

As shown in FIG. 3, the configuration of the mixing and measuring system according to this method includes a circular slide table 10 on a pedestal 9, and measuring cups 13 arranged at positions divided into 12 equal parts on the circumference. be.

In this embodiment, in order to be able to mix and measure up to Elfin, there are measuring devices 11A to IIH in 8 of the 12 measuring cups 13, and one place is the discharge port 12 of the mixing meter In to the packaging machine. There's a lot of yelling. Further, the measuring cup 13 can be moved intermittently on the slide table 10 by 30 degrees.

As shown in FIG. 4, each weighing device 118 to 11) 1 has a linear feeder 15 for feeding objects to be weighed and a parts feeder 16 for feeding objects to be weighed. The object to be measured sent from the cup 15 is directly put into the cup 17 for total 1. A load m'R handler 18 is held below the measuring cup 17.

The measurement method using this measurement system will be explained.

In figure M3, the device supplies and weighs measurements @A, B, .
, 1. Ocy, 0.9g, 0.8g, 0.7g, 0.6
A case will be explained in which a total of 6.8 g of product is produced by combining 0.5 g and 0.5 g of each product.

Each total JL! ! To @ll ~ For both IIH and load m*, the measuring cup is placed on the model machine as the measuring origin.

The measured value of the supply of the object A to the measuring device 11 is 1.2 g.
The supply of weighing object B and the measured value of weighing device ll1IB are assumed to be 23 g of ii&, which is the sum of weighing objects A and B. Further, the supply of the object to be weighed C. and the measured value of the weighing device 11G are assumed to be 33 g, which is the combined weight of the objects to be measured A, B, and C. In the same manner, the supply from the weighing rod to H, the weighing devices 110 to 11
) 1 weighs 4.2g, 5.0g, and 5.7g, respectively.
, 6.3g, and 6.8g.

Similar to the conventional weighing system, when paying attention to the measuring cup at the object A, the object A is first put into the measuring cup by 1.2a by the measuring device 11A, and the measurement is completed.

Subsequently, this measuring cup is sent to the weighing device 11B for the object B to be weighed.

Here, there is already 1.2 of the measured object A in this measuring cup.
Start weighing with g in the sample, add jLIjlB until the total weight of items A and B is 2.3 g, and complete the weighing. Furthermore, at the measuring device fil N; of the object to be measured, the same measuring cup and the date of the object A are 23a.
Start weighing from the loaded state, and add Ik item C until the total weight of items A, B, and C is 33g, and complete the weighing.

By turning this around to the object to be measured H, the object to be measured A-H
are mixed to make a total of 6.8 g of product.

Here, the measurement accuracy of the present mixing and measurement system will be explained. Each weighing device 11A to IIH has a total of +0.1 a, just like the conventional weighing system! This will be explained assuming that there is an error.

When we finished weighing object A, there was an error of +0.1g from the target weight of 1.29, and there was 1.3g in the measuring cup.
Even if we start weighing object B with g of object A in it, the weighing error against the target measurement of 2.3 g is still +0.1 g, which is the error when weighing object A. are not cumulative. Similarly, even if the weighing of objects C to H is carried out continuously, the difference in tyt between each one is 10, Ig with respect to each measurement target, and when the last object to be measured H is weighed. But the first measurement goal is 6.8
There can only be a weighing error of +0.1 g.

As described above, in the multi-product mixed weighing method according to the present invention,
The weighing accuracy of the weighing device in the conventional multi-item 41-mix weighing system remains the same, and without reducing production capacity. It becomes possible to significantly improve the A degree.

[Brief explanation of the drawing]

Figure N1 is a plan view showing the configuration of a conventional mixing and measuring system. FIG. 2 is a side view showing the configuration of each measuring device in Diagram N1. FIG. 3 is a plan view showing the configuration of a mixing and measuring system according to this method. FIG. 4 is a side view showing the configuration of each measuring device in FIG. 3. (Numbers in the drawing) Fig. 1 1 = Packet conveyor 2^: Supply of weighing object A, Weighing device 282: Supply of weighing object B, Weighing device 2C: Supply of weighing object C, Weighing device 20: Supply of weighing object , Weighing device 2E: Supplying the object to be measured E, Weighing device 2F: Supplying the object to be measured F, Meter r Handling device 8: Packet conveyor Figure 3 9 = Frame 10: Slide table 11A: Supplying the object to be weighed, weighing device, ile: Supplying the object to be weighed B, weighing device 11C:
Supply of object C, meter Ik device 110: Supply of object C, measuring device 11E: Supply of object E, measuring device 11F2 Supply of object F, weighing device 11G: Supply of object G, measuring device 11H: Supply of weighing object H, i
Ti device 12: Discharge port 13: Measuring cup No. 4214: Frame 15: Linear feeder 16: Parts feeder 17: Measuring cup 18: Load 11 converter

Claims (1)

[Claims] When weighing and mixing multiple objects to make a single measurement object, when weighing any object, it is necessary to match the target value of the weight to be weighed beforehand with the weight to be weighed itself. This multi-item mixed weighing method is characterized in that weighing errors in multiple weighings are not accumulated by weighing the same product as a weighing target.