JPH0441304Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an automatic weighing device of a combination weighing type using a plurality of weighing machines.

(Prior art) An object to be weighed is supplied to each of a plurality of weighing machines arranged in a circle, and a combination calculation is performed based on the weighing values of each weighing machine. By selecting the combination that gives the closest value to the weight and discharging only the objects to be weighed from the weighing machine that correspond to the selected combination,
A combination weighing type automatic weighing device that weighs an object to be weighed to the above-mentioned target weight or a weight close to the target weight has been put into practical use.

However, this type of automatic weighing device can only weigh one set target weight, so when weighing the same object to different weights, the first target weight After completing the weighing work, set the target weight to the second
The target weight must be reset and the weighing operation is performed again, or two weighing devices each with a different target weight are used, but in the former case, the work efficiency is poor, and in the latter case, the weighing device In addition to having two units, it also requires two systems for supplying objects to be weighed to each weighing device, making the equipment extremely large-scale.

(Purpose of the invention) The present invention addresses the above-mentioned actual situation in weighing work using an automatic weighing device, and allows weighing the same object to be weighed to different target weights simultaneously. By realizing an automatic weighing device, the aim is to be able to efficiently and without requiring large-scale equipment when weighing the same object into two types of products with different weights. do.

(Structure of the invention) The automatic weighing device according to the invention is characterized by having the following structure in order to achieve the above object.

That is, a distributed feeding device, a plurality of weighing machines that are arranged in a circle around the distributed feeding device and each weighing machine is supplied with an object to be weighed from the distributed feeding device to a weighing hopper provided in each weighing machine, and each weighing machine. a collection chute that is provided below the weighing hopper and collects and discharges the objects to be weighed discharged from each weighing hopper; The weighing machines in both groups are configured to perform a combined weighing operation independently of each other with the weight set for each group as the target, and a state in which first and second gathering parts are provided corresponding to the first and second groups of weighing machines, and the distributed supply device is capable of supplying objects to be weighed to the weighing machines of both groups; A gate device is provided that can switch between a state in which the supply of objects to be weighed to one group of weighing machines is cut off. According to such a configuration, one weighing device can perform the weighing work of two devices, and in particular, it is possible to simultaneously weigh the same object to different target weights. At the same time, when a weighing operation is performed by only one group of weighing machines, the gate device makes it possible to prevent unnecessary supplies of objects to be weighed to the other group of weighing machines.

(Example) The present invention will be described below based on an example shown in the drawings.

As shown in FIG. 1, the base 2 of the automatic weighing device 1
A support stand 4 is installed above via a plurality of support legs 3 . This supply section 5 is connected to an introduction chute 6 disposed above the center of the support base 4.
, a dispersion table 8 installed below it on a support base 4 via a vibrator 7, and a plurality of supply troughs 10 radially installed around the dispersion table 8 via vibrators 9, respectively. ...10 and each trough 10
. . . 10, the pool hoppers 11 have the same number of pool hoppers 11 as the troughs attached around the support base 4 below the tip thereof. Here, a pair of light emitting members 13a and light receiving members 13b are attached to the frame 12 that supports the introduction chute 6 so as to be located at 180° opposite sides with the dispersion table 8 in between.
The amount of objects to be weighed on the dispersion table 8 is detected, and when the amount exceeds a certain level, the object supply device (not shown) is stopped.

Moreover, on the base 2, a weight detector 14...
14 and weighing hoppers 15...15 provided in each weight detector 14...14.
6...16 are arranged in a circle corresponding to each of the troughs 10...10 or pool hoppers 11...11, and on the lower surface of the support base 4, there are pool hoppers 11 and weighing hoppers 1 located vertically corresponding to each other.
The hopper opening/closing device 17...1 corresponds to each set of 5.
7 is provided. This hopper opening/closing device 17...
...17 is actuated by a motor 18 provided at the center of the lower surface of the support base 4, and when receiving a command to discharge the object to be weighed, projects the pressing members 17a and 17b, respectively, and presses the pool hopper 11 located on the side thereof and the weighing member 17. Each gate 11a and 15a of the hopper 15 is opened.

On the other hand, below each of the weighing hoppers 15...15, there is provided a collection chute 19 whose upper end is wide open to receive the objects to be weighed discharged from these hoppers 15...15. As shown in FIGS. 1 and 2, this collective chute 19 is divided into an upper chute 20 and a lower chute 21, and the entire chute 19 is divided into left and right parts, and is divided into a first collective having a substantially semicircular planar shape. The configuration includes a section 19 ₁ and a second gathering section 19 ₂ . That is, the inside of the lower chute 21 is divided into a first gathering space 23 ₁ and a second gathering space 23 ₂ by a partition wall 22 provided at the center, and a second gathering space 23 1 and a second gathering space 23 2 are provided at the lower ends of both spaces 23 ₁ and 23 ₂ . 1 and second discharge ports 24 ₁ and 24 ₂ are provided, respectively. The upper chute 20 also has substantially fan-shaped first to third collecting members 25 1 to ₂ that introduce objects to be weighed into the first collecting space 23 ₁ of the lower chute 21 .
5 ₃ and fourth to sixth collecting members 25 ₄ to 25 ₆ which are also substantially fan-shaped and which introduce objects to be weighed into the second collecting space 23 ₂ of the lower chute 21 . As a result, multiple pieces arranged in the circle above (in the example shown)
The objects _to be weighed are discharged from the weighing hoppers 15 ₁ to 15 1 of half (7) of the weighing machines 16 ₁ ... ₁₆ arranged in a semicircle among the 14 weighing machines 16 ... 16.
~Third gathering members 25 ₁ to 25 ₃ and first gathering space 23
The first collecting part ₁₉ consists of ₁ and 1.
Discharged from outlet 24 ₁ , and the other half (7)
Weighing machine 16 ₂ ...16 ₂ weighing hopper 15 ₂ ...
The objects to be weighed discharged from 15 ₂ are collected in the second collection space 19 ₂ consisting of the fourth to sixth collection members 25 ₄ to 25 ₆ and the second collection space 23 ₂ and are discharged from the second discharge port 24 _2. It is becoming more and more common.

Among the plurality of weighing machines 16...16, the first group of weighing machines ₁₆₁ ... ₁₆₁ corresponding to the first collecting section ₁₉₁ and the second collecting section ₁₉₂
The second group of weighing machines corresponding to 16 ₂ ...16 ₂
and are designed to perform combined weighing operations independently of each other. Note that the support frame 12 includes the following:
As shown by the chain line in FIG. 1, a gate device 26 is provided below the introduction chute 6, and details of this device 26 will be described later with reference to FIGS. 3 and 4.

According to the above configuration, the objects to be weighed are supplied onto the distribution table 8 from the supply device (not shown) via the introduction chute 6, and are then transferred from the distribution table 8 to the plurality of pool hoppers 1 through each supply trough 10...10.
1...11, and further from the pool hoppers 11...11 to a plurality of weighing machines 16...16 arranged in a circular manner, weighing hoppers 15...1
5. And each weighing hopper 15...
15, the weight of the object to be weighed is detected by each weight detector 14.
... 14, and a combination calculation is performed based on the measured weight value. In that case, the weighing machines 16...16 are the first group of weighing machines ₁₆₁ ... ₁₆₁ and the second group of weighing machines ₁₆₂ ...
...16 ₂ groups, and the combined weighing operation is performed independently for each group. In other words,
The optimum combination is calculated so that only the weight values of the objects to be weighed in the weighing hoppers 15 ₁ ... 15 ₁ of the weighing machines 16 ₁ ... 16 ₁ of the first group reach the target weight set for the group, and Weighing hopper 1 in the second group of weighing machines 16 ₂ ...16 ₂
The optimal combination is calculated so that only the weight values of the objects to be weighed within 5 ₂ ...15 ₂ will reach the target weight set for the group. Then, weighing hopper 1 that corresponds to the optimal combination in each of both groups.
5 ₁ ... 15 ₁ , 15 ₂ ... 15 ₂ gate 15a...
...15a is opened and moved by the operation of the hopper opening/closing device 17...17, and the object to be weighed inside is discharged and dropped into the collecting chute 19 below.
Since this collecting chute 19 has mutually independent collecting parts 19 ₁ and 19 ₂ corresponding to the first _and second groups of weighing machines _{16 .} 15 ₁ ...15 ₁
The objects to be weighed discharged from the weighing hoppers 15 ₂ ... 15 ₂ of the weighing machines 16 ₂ ... 16 ₂ of the second group do not mix together in the collection chute 19, and the objects are discharged from the first and second discharge ports. It is separated from 24 ₁ and 24 ₂ and discharged.

Therefore, two groups of objects weighed to the target weight are obtained by one cycle of weighing operation of the weighing device 1 as a whole, and regarding the first group of weighing machines 16 ₁ ... 16 ₁ It is possible to make the target weight of the second group different from the target weight of the second group _{of weighing machines 16 2 .}

Note that the objects to be weighed as described above are normally supplied to a packaging device (not shown) installed below the collection chute 19, but in this case, the packaging device is 1. Second discharge port 24 ₁ ,
Two packaging devices, each of which is supplied with objects to be weighed from No. 24 ₂ , are installed, or a packaging device having two systems of packaging functions is installed.

By the way, in the automatic weighing device 1 as described above, the weighing machines 1 of the first group or the second group
It is possible to perform weighing work using only 6 ₁ ...16 ₁ or 16 ₂ ...16 ₂ , and there may be cases where one of both groups must be stopped for replenishment of packaging bags in the packaging machine, etc. However, when performing weighing work using only the weighing machines 16 ₁ ... 16 ₁ or 16 ₂ ... 16 ₂ of one group, depending on the properties of the objects to be weighed, etc., the stopped group may The following problems may occur. That is, in the distributed supply unit 5, the vibrators 9...9 of the supply troughs 10...10 corresponding to the stopped group of weighing machines are stopped, and the troughs 10...1
The supply of objects to be weighed from 0 to the corresponding pool hoppers 11...11 is also stopped, but the distribution table 8 is shared by both groups and
Since it is always in operation, the objects to be weighed are supplied from the table 8 to the supply troughs 10...10 that are stopped, and gradually accumulate in the troughs 10...10. Therefore, when the weighing machines 16 ₁ ... 16 ₁ or 16 ₂ ... 16 ₂ of the stopped group are activated next time, the corresponding weighing machine 1
6 ₁ ...16 ₁ or 16 ₂ ...16 ₂ weighing hopper 1
A significantly large amount of objects to be weighed will be put into 5 ₁ ... 15 ₁ or 15 ₂ ... 15 ₂ , making it impossible to perform combination calculations in that group.

This problem can be solved by the gate device 26 shown in FIGS.
This can be solved by providing .

That is, the distribution table 8 in the distribution supply unit 5
Above the first group, there is a first
The first gate 26 ₁ cuts off the supply of objects to be weighed to the supply troughs 10 ₁ ... 10 ₁ of the group, and the supply troughs 10 ₂ ... 10 ₂ of the second group corresponding to the weighing machines of the second group. a gate device 26 having a second group 26 ₂ that cuts off the supply of objects to be weighed;
is provided. These gates 26 ₁ , 26 ₂
is a frame 12,1 supporting the introduction chute 6
The upper end portion is swingably supported between mounting plates 27, 27 fixed in parallel to the mounting plates _{27, 27} , and cylinders 29 1, ₂₉ are connected to the swing shafts 27 ₁ , 27 ₂ via levers 28 1, 28 ₂ . 29 ₂ are connected, and by the operation of these cylinders 29 ₁ and 29 ₂ , for example, the first gate 26 ₁ on the left is in the upwardly open position as shown, and the second gate 26 ₂ on the right is in the open position. As shown in FIG. ing. Therefore, if both gates 26 ₁ and 26 ₂ are opened upwardly, two systems of weighing machines 16 ₁ ... 16 ₁ , 16 ₂ ... 16 ₂ are used as described above. In addition to being able to perform mutually independent weighing operations in parallel, for example, when performing weighing work using only the first group of weighing machines, the first gate ₂₆₁ is placed in the open position as shown in the figure. When the second gate ₂₆₂ is set to the cutoff position, the objects to be weighed on the dispersion table 8 are transferred to the supply trough 1 of the first group.
0 ₁ ...10 ₁ , and the flow into the second group of supply troughs 10 ₂ ...10 ₂ is blocked. This allows the supply trough 10 of the second group to be
₂ ...10 Too many objects to be weighed accumulate in ₂ , and when the next operation starts, a large amount of objects to be weighed is supplied to the weighing hopper of the second group of weighing machines via the pool hopper, making it impossible to perform combination calculations. Problems such as this will be prevented.

(Effect of the invention) As described above, according to the invention, in an automatic weighing machine having a plurality of weighing machines arranged in a circle, each weighing machine is divided into the first and second groups, and both groups Since combined weighing is performed for each of the two, it is possible to simultaneously perform weighing operations for different target weights using one automatic weighing device. As a result, when the same object is to be weighed into two types of products with different weights, this can be done efficiently and without requiring large-scale equipment. Furthermore, according to the present invention, when performing a weighing operation with only one group of weighing machines, unnecessary supply of objects to be weighed to the other group of weighing machines is prevented, and problems associated with this unnecessary supply are prevented. This will be prevented.

The automatic weighing device according to the present invention is different from the conventional automatic weighing device by changing the computer program that controls combination calculations, weighing operations, etc., and replacing the collection chute with a chute with a single collection discharge route. Similarly, it has the advantage that it can also be used as an automatic weighing device that obtains objects to be weighed of target weight from the weighing values of all weighing machines.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall longitudinal sectional front view of an automatic weighing device, FIG. 2 is a plan view of a collection chute in the automatic weighing device, and FIG. 3 is an enlarged front view of a distributed supply section. Figure, Figure 4 is Figure 3-
FIG. 3 is a plan view cut along a line. 1... Automatic weighing device, 8... Dispersion supply device (dispersion table), 16, 16 ₁ , 16 ₂ ... Weighing machine,
19...Gathering shot, 19 ₁ ...First gathering part,
19 ₂ ...Second gathering section, 26...Gate device, 2
6 ₁ ... 1st gate, 26 ₂ ... 2nd gate.

Claims (1)

[Scope of utility model registration request] An automatic system having a single distributed feeding device, a plurality of weighing machines arranged in a circle around the feeding device, and a collection chute with a receiving section facing below the weighing hopper provided in each weighing machine. A measuring device,
The above-mentioned weighing machines are arranged in a semicircle and are divided into the first and second groups, and the weighing machines in both groups operate independently of each other, aiming at the weight set for each group. It is configured to perform a combined weighing operation, and the collecting chute is provided with first and second collecting portions corresponding to the first and second groups of weighing machines, and the dispersion feeding device is provided with both of the weighing machines. A gate device is provided that can switch between a state that allows the supply of objects to be weighed to the weighing machines of one group and a state that cuts off the supply of objects to be weighed to the weighing machines of one group. Features an automatic weighing device.