JPH0338661Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a combination weighing device that weighs objects to be weighed to a predetermined target weight using a large number of hoppers.

(Prior art) The object to be weighed is supplied to a weighing hopper provided in each of a large number of weighing machines, and a combination calculation is performed based on the weighing values of each weighing machine to determine whether the combined added value matches the target weight or not. By selecting the optimal combination that gives the closest value to the target weight, and discharging only the objects to be weighed from the weighing hopper that correspond to the weight values that correspond to the optimal combination, the target weight or the weight closest to this can be achieved. Combination weighing devices designed to measure objects are in practical use. However, in this type of combination weighing device, in order to speed up weighing work, a pool hopper is provided above each weighing hopper, and a pool hopper is provided above the weighing hopper that discharges the object to be weighed according to the optimal combination. The object to be weighed for the next weighing is immediately supplied from the pool hopper located there. Objects to be weighed are supplied to the empty pool hopper automatically or manually by an operator.

However, according to the above configuration, the same number of pool hoppers as the weighing machines or weighing hoppers are provided, which increases the number of parts, complicates the structure, and increases costs. In particular, in the case of a so-called semi-automatic combination weighing device in which objects to be weighed are manually loaded into pool hoppers, objects to be weighed are placed into the same number of pool hoppers as the optimal combination of weighing machines. It is difficult to input the pool in a short period of time, and the large number of pool hoppers means that they must be arranged over a wide area, resulting in a problem that the throughput of the workers is reduced or the number of workers needs to be increased. To solve this problem, the number of weighing machines themselves can be reduced, but this inevitably results in a decrease in weighing accuracy.

(Purpose of the invention) The present invention is based on the above-mentioned weighing hopper and pool hopper, in which a large number of hoppers are used to input objects to be weighed into which weight combination calculations are performed, and objects to be weighed for the next combination calculation are placed in these hoppers. This is to deal with the above-mentioned situation in a combination weighing device in which supply hoppers are arranged above and below, and it is possible to solve the problem as a whole without reducing the weighing accuracy, that is, without reducing the number of weight data on which combination calculations are performed. This makes it possible to reduce the number of pool hoppers, which reduces the number of parts and reduces manufacturing costs.Especially in the case of semi-automatic combination equipment, it reduces the number of pool hoppers into which objects to be weighed are manually fed. Furthermore, the purpose is to speed up weighing work by centrally placing them within the reach of workers.

(Structure of the invention) The combination weighing device according to the invention is structured as follows in order to achieve the above object.

That is, in a combination weighing device that combines the weights of objects to be weighed put into a number of hoppers, selects an optimal combination of hoppers, and discharges the objects to be weighed from the hoppers that correspond to the optimal combination, the hoppers described above are used. A plurality of sets are provided, each consisting of two hoppers arranged facing each other, and above the two hoppers in each set, each set has a hopper that moves laterally from the loading position of the object to be weighed to a position directly above the hoppers on both sides. One unit will be deployed for each group. The hopper disposed above is configured so that the object to be weighed for the next combination is put into the hopper of the pair of hoppers located below from which the object to be weighed has been discharged.
According to such a configuration, the number of hoppers that supply objects to be weighed to the hoppers on which weight combination calculations are performed is halved, and the overall weight data is reduced without reducing the number of weight data on which combination calculations are performed. The number of hoppers will be reduced.

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

As shown in FIG. 1, the combination weighing device 1 has a base 2 and an object supplying table 3 with a flat upper surface 3a installed on the base 2. At the center of the upper surface of the object supply table 3, in the illustrated example, six object input ports 4 . . . 4 are opened in a row. Also,
The base 2 is separated into left and right side parts 2a, 2a, and a collection conveyor 5 is housed between both sides 2a, 2a so that it can be pulled out to one side, and the terminal end of the conveyor 5 is It is connected to a discharge conveyor 6 on the other side. Further, from one side of the base 2, there is an operation box 7 provided with keys 7a, such as a numeric keypad, for inputting target weight, etc., and display devices 7b, 7b for displaying weighed weight, etc. is erected via a support 8.

Next, the internal structure of the combination weighing device 1 will be explained. As shown in FIGS. 2 and 3, there are six pool hoppers 9 below each input port 4... 9 are provided respectively, and 6 are provided on the left and right sides 2a, 2a of the base 2, respectively.
A total of 12 weighing machines 10...10 are arranged in two rows, one each. This weighing machine 10...10 is
A weight detector (load cell) 11 is fixed to the upper surface of the base side portion 2a, and a weighing hopper 14 is attached to the detector 11 via engaging members 12 and 13.
The total weight of the hopper 14 and the object to be weighed fed into the hopper 14 is loaded onto the detector 11. In addition, the weighing hopper 14
is equipped with two-stage gates 15 and 16 for opening and closing the discharge port formed on the lower side surface of the main body, and when the push rod 17 protrudes from the side surface of the base side portion 2a, the arm portion 15a of the lower gate 15 opens and closes. When the gate 15 is swung, the gate 15 opens upwardly, and as the gate 15 opens, the upper gate 16 is also engaged with the lower gate and opens upwardly. The weighing hoppers 14, 14 of the weighing machines 10, 10 correspondingly located on the left and right sides are located above the collection conveyor 5, facing each other, and the pool hopper 9 is located above the intermediate portion of both weighing hoppers 14, 14. are located, and six sets of these are installed in parallel at right angles to the collecting conveyor 5.

On the other hand, as shown in FIGS. 4 and 5, each of the pool hoppers 9 has U-shaped engaging members 18, 18 fixed to both sides of the main body 9a, a support plate 19, 19, the fourth
The pool hopper 9 is movably held in a range between positions B and C directly above the left and right weighing hoppers 14, 14 shown in chain lines around an intermediate position A shown by a solid line in the figure, and the pool hopper 9 is moved to each of the above positions C, 14, and 14. A cylinder 21 serving as a driving device for moving the weighing object to A and B is fixed to the back side of the weighing object supply table 3 via support members 22 and 22. Further, the lower part of the main body 9a of the pool hopper 9 is used as a discharge port, and gates 23, 23 for opening and closing the right and left halves of the discharge port, respectively, are pivoted on the main body 9a via support shafts 24, 24, respectively. It is freely supported. A roller 2 is connected to both gates 23, 23 via arm portions 23a, 23a, respectively.
5, 25, and the rail 2
A guide plate 26 is attached to one of 0 and 20,
The rollers 25, 25 are supported from below by the lower edge 26a of the guide plate.
It has a shape consisting of 6a'' and 26a''. Therefore, the pool hopper 9 is located at the intermediate position A, and the rollers 25, 25 are moved to the horizontal portion 2 of the lower edge 26a of the guide plate.
If supported by 6a', the above gates 23, 2
3 is held in an inclined position that closes both the left and right halves of the discharge port against its own weight, but when the pool hopper 9 is located at the lateral position B or C, the lateral roller 25 is moved as a guide. Curved portion 2 of the lower edge 26a of the plate
By being able to rotate upward along 6a'',
The side gate 23 is configured to open downward in response to its own weight and the weight of the object to be weighed in the hopper.

Incidentally, on the upper surface of each pool hopper 9, shielding plates 9c, 9c extending on both left and right sides are integrally provided with the main body 9a, and as shown in FIG. When located in the center of the opening 4, both sides of the input opening 4 are closed from below by the shielding plates 9c, 9c, but the closing plates 9c, 9c are such that the hopper 9 is on the side. The length is long enough to close the side of the input port 4 opposite to the hopper movement direction even when the hopper moves in the opposite direction. Here, the reason why the input port 4 is opened laterally and wider than the width of the upper surface opening 9d of the pool hopper 9 as shown in the figure is because the opening 9d is not completely closed even when the hopper 9 is moved. This is to prevent the worker's hand from getting caught by opening it upward.

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

First, at the start of work, as shown in FIG. 1, an appropriate amount of the objects to be weighed X piled up on the flat upper surface 3a of the object to be weighed supply table 3 is placed below each input port 4...4. Pool hopper 9...Put it in 9. In this case, each pool hopper 9 is in a state where the upper surface opening 9d is located in the center of the input port 4, that is, in the intermediate position A shown in FIG.
The rollers 25, 25 provided on the gates 23, 23 on both sides are supported by the horizontal portion 26a' of the lower edge 26a of the guide plate 26. Both halves are in a closed state. From this state, each pool hopper 9...9 has cylinders 21...2
1, for example, the weighing hopper 14...14 located on the right side is moved to the upper position B...B, but at this time, the right roller 25 is moved to the right curved part of the lower edge 26a of the guide plate. 26a'' and similarly opens the gate 23 on the right side, the objects to be weighed put into each pool hopper 9...9 are all delivered into the weighing hopper 14...14 on the right side all at once. After that, each pool hopper 9
. . . 9 is returned to the initial intermediate position A . . . A again by the operation of the cylinders 21 . The gate 23, which had been open, is closed by being rotated downward along the same direction. Then, when each pool hopper 9...9 is returned to the intermediate position A...A, the object to be weighed
Due to the operation of the cylinders 21...21, the upper position C of the weighing hopper 14...14 is now located on the left side.
...C, and the objects to be weighed are similarly supplied to the left weighing hoppers 14...14.

In this way, two rows of 12 weighing hoppers 14...
...14 are supplied with objects to be weighed, and each pool hopper 9...9 returned to intermediate position A...A is further loaded with objects to be weighed, and each weighing hopper 14... The weight of the object to be weighed is measured by each weight detector 11...11, and a combination calculation is performed based on the measured values, and the combined added value is a preset target weight or the closest one. The optimal combination resulting in weight is selected. Then, for the plurality of weighing hoppers 14...14 corresponding to the weighing values corresponding to this optimum combination, the push rods 17...
...17 protrudes and gates 15, 16...15, 1
6 is opened, and the objects to be weighed are dropped onto the collection conveyor 5 running below. As a result, an amount of objects to be weighed having the above-mentioned target weight or a weight close to this is obtained on the collection conveyor 5, and the objects are collected and transferred to a packaging device, etc. by the carry-out conveyor 6 shown in FIG. Supplied. Here, when selecting the above-mentioned optimal combination, if a set of two weighing machines 10, 10 located opposite each other simultaneously corresponds to the optimal combination, the object to be weighed for the next weighing will be supplied from either side. It is carried out only in the weighing hopper 14,
The remaining empty weighing hoppers are controlled so that zero point adjustment is automatically performed the next time the weighing is performed.

However, as described above, a plurality of weighing hoppers 1
When the object to be weighed is discharged from the weighing hoppers 14...14,
Intermediate position A...Pool hopper 9 located at A
. . . 9 is moved to the right or left by the cylinders 21 . . . 21 to a position B directly above the weighing hopper 14 .
or C, and the moved side gate 23 is opened, thereby opening the pool hopper 9.
. . 9 to the empty weighing hoppers 14 . . . 14 are supplied with objects to be weighed for the next time. Then, the next weighing operation is performed when all the weighing hoppers 14...14 have been supplied with the objects to be weighed, but during that time the pool hoppers 9... 9 is returned to the intermediate position A...A again, and the object to be weighed X on the object to be weighed supply table 3 is loaded by the operator to prepare for the next feeding operation.

Thereafter, the weighing operation is repeated in the same way, but in each weighing operation, in the case of the example in the figure, a combination calculation is performed based on the weighing values of 12 units, whereas the operator moves to the pool hopper 9...9. The loading operation of objects to be weighed can be up to 6 times per weighing operation.
This can be done for 3 to 4 pool hoppers (usually 3 to 4 pool hoppers), and these pool hoppers are placed much closer and more concentrated than if each weighing machine had one pool hopper. Work efficiency such as visually checking the pool hopper and supplying objects to be weighed is improved.

In the above embodiment, as shown in FIG. 3, the object to be weighed supply table 3 is connected to the base 2 at the lower end of one side via the hinge mechanism 27, so that the handle on the side surface of the other side 28 to the supply stand 3
Pool hopper 9...9, cylinder 21...2
1. Guide plates 26... 26, etc., are capable of opening upward and are provided with a telescopic support rod 29 for holding the guide plates in the open state. This facilitates cleaning of the pool hoppers 9...9 and the weighing hoppers 12...12.

Further, the collecting conveyor 5 housed between the side parts 2a, 2a of the base 2 has casters 30,
30, and the intermediate part or rear end part is supported by a plurality of rollers 31...31 that are pivotally supported on the side surfaces of the base side parts 2a, 2a, and can be pulled out with a light force during cleaning etc. It's becoming like that.

(Effects of the invention) As described above, the combination weighing device according to the invention includes a plurality of sets each including two hoppers arranged opposite to each other into which objects to be weighed for which weight combination calculations are to be carried out. At the same time, a hopper is installed above the two hoppers in each set, which moves horizontally from the loading position of the object to be weighed to a position directly above the hoppers on both sides and supplies the object to be weighed for the next combination to the hopper below. Since one hopper is provided for each group, it is possible to reduce the number of hoppers without reducing the number of weight data on which combination calculations are performed, that is, without reducing measurement accuracy. This results in
In addition to simplifying the structure or reducing costs, especially in the case of a semi-automatic combination weighing device, the number of pool hoppers into which objects to be weighed are manually fed can be reduced and centralized, speeding up weighing work. is realized.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention: Fig. 1 is an overall perspective view of the combination weighing device, Fig. 2 is a partially cutaway plan view, Fig. 3 is a partially cutaway front view, and Fig. 4 is a pool hopper section. The enlarged front view of Fig. 5 is Fig. 4-
FIG. 3 is a longitudinal side view taken along a line. 1...Combination weighing device, 9...Hopper, 10...
...Weighing machine, 14...Hotsupa.

Claims (1)

[Scope of utility model registration request] A combination weighing device which combines the weights of objects to be weighed put into a number of hoppers, selects an optimal combination of hoppers, and discharges the objects to be weighed from the hoppers corresponding to the optimal combination. A plurality of sets of hoppers are provided, one set consisting of two hoppers arranged opposite each other, and above the two hoppers in each set, there are hoppers arranged horizontally from the position where the object to be weighed is placed directly above the hoppers on both sides. A combination weighing device characterized in that one hopper is provided for each set, which moves to a lower hopper to supply objects to be weighed for next combination to a lower hopper.