JPH0361895B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combination weigher, and more particularly to a configuration for gathering articles to be weighed.

2. Description of the Related Art Conventionally, there has been a device for collecting articles to be weighed in a combination weighing machine that uses a switching chute to distribute the articles to be weighed discharged from a weighing machine into two collecting chute. Such a gathering device can be used when the packaging machine's ability to process the combined weighed articles is quite low, for example 60 times per minute, even though the combination calculation capacity is quite high, for example 120 times per minute. , the above-mentioned two collecting chutes may be provided above two packaging machines to increase throughput. However, since this collection device uses a switching chute, there is a problem in that the overall height of the combination scale increases by the switching chute. Generally speaking, when the height of a combination scale increases, the strength of the frame that supports the weighing machine and the feeder that supplies items to be weighed to these weighing machines must be increased, or the height of the house housing the combination scale must be increased. Therefore, the cost will increase.
Furthermore, since the switching chute was switched at a fairly high speed of 120 times per minute, there was a problem that the article to be weighed inside the switching chute could be damaged.

In addition, as another conventional collecting device, the inner and outer chute are crossed and the supply ports are arranged concentrically,
There is also a weighing machine that has outlets for discharging objects to be weighed in two different directions on the upper periphery of a collecting chute that has discharging ports arranged side by side to form two independent discharging routes. However, since the inner and outer chute intersect, the structure of the collective chute becomes complicated, making it troublesome to manufacture and increasing the price. Also,
Because the intersection of the inner and outer chute has a narrow or curved or complicated shape, the object to be weighed may get stuck in the middle, or the falling distance of the object to be weighed may be different between the inner and outer chute. , there was a problem that the arrival time to the discharge port was different. To solve this problem, it was necessary to increase the height of the chute, which caused the same problem as in the prior art described above. Furthermore, since the inner and outer chute are arranged concentrically, the width is increased by the outer chute. When a combination scale is used in a factory or the like, it is desired to increase the usage efficiency of the factory house by arranging a plurality of scales, but the wide width goes against this desire.

An object of the present invention is to provide a combination weigher that solves each of the above problems.

Therefore, in the present invention, one collection chute is divided into a first and a second chamber approximately at the center by a partition wall, and a discharge port is provided at the lower part of each of the first and second chambers, and the above-mentioned A first extension part communicating with the second room is provided outside the first room near one end of the partition wall, and a first extension part communicating with the second room is provided outside the second room near the other end of the partition wall. A second extension part communicating with the first room and the second extension part is provided above the boundary part between the first room and the first extension part and the boundary part between the second room and the second extension part, respectively, in the direction of the room and in the direction of the extension part. In this configuration, an article storage tank having an input port is provided in both of the chambers, and an article storage tank having one input port is provided above the first and second chambers other than the boundary portion.

With this configuration, since a switching chute is not required, the height of the entire combination scale can be reduced, and the articles to be weighed will not be damaged. Also, the first
Since the second extension part is provided only near both ends of the partition wall, manufacturing is easy, and there is no possibility that objects to be weighed will get clogged or that the time taken to reach the discharge port will be different. It is also possible to reduce the width dimension.

Hereinafter, the present invention will be explained in detail based on three illustrated embodiments. A first embodiment is shown in FIGS. 1 to 5. In FIGS. 1 to 3, reference numeral 2 denotes a collective chute, which has an approximately inverted truncated conical shape, and is divided into a first room 4 and a second room by a partition wall 3 passing through its center.
It is divided into room 6. The first and second chambers 4, 6 both have semicircular supply ports 8, 10 at the top, and discharge ports 12, which do not communicate with each other, at the bottom.
It has 14.

Outside the first room 4 near one end of the partition wall 3, there is a first extension 16 that protrudes further outward.
is formed, which communicates with the discharge port 14. Similarly, a second extension 18 is formed outside the second chamber near the other end of the partition wall 3 and further projects outward, which communicates with the outlet 12. .

Boundary section 20 between first extension section 16 and first chamber 4
Above there are weighing machines 26a and 2 which have two input gates 22 and 24 so that articles to be weighed can be input into both the first extension part 16 and the first chamber 4.
6b is provided. Similarly, the second extension 18
And above the boundary part 28 of the second room 6, a second
Two input gates 22 are provided so that articles to be weighed can be input into both the extension section 18 and the second chamber 6.
Weighing machines 26c and 26d having 24 are provided.

Above the periphery of the first chamber 4, there is a first chamber 4.
Six weighing machines 32a to 32f each having one input gate 30 are provided so that articles to be weighed can be input into the weighing machines 32a to 32f. Similarly, the second room 6
Six weighing machines 36a to 36f, each having one input gate 34, are provided above the peripheral edge of the second chamber 6 so that articles to be weighed can be input into the second chamber 6.

Although not shown in the figure, supply hoppers are provided above each of these weighing machines 26a to 26d, 32a to 32f, and 36a to 36f.
d, 32a to 32f, and 36a to 36f, respectively. Although not shown in the figure, articles to be weighed are supplied to each of these supply hoppers from a straight feeder placed above each of these supply hoppers, and articles to be weighed are supplied to each straight feeder from a distributed feeder. .

Weighing machines 32a to 32f, 26a to 26d,
Each of the measurement signals 36a to 36f is supplied to nine arithmetic units 38a to 38i, as shown in FIG. Each of the calculation devices 38a to 38i has two combination calculation units 40 and 42, but the types of measurement signals supplied to these units differ. That is, the combination calculation unit 40 of the calculation unit 38a includes the weighing machine 32a.
Weighing signals from weighing machines 36a to 32f, 26a, and 26b are supplied to the combination calculation unit 42.
Metering signals 6f, 26c, and 26d are supplied.
(See Figure 5a). Combination calculation unit 4 of calculation unit 38b
0 has weighing machines 32a to 32f, 26a, 26c
The combination calculation section 42 is supplied with the weighing signals of the weighing machines 36a to 36f, 26b, and 26d (see b in the figure). Arithmetic unit 38c
The combination calculation unit 40 includes weighing machines 32a to 32.
Weighing signals of weighing machines 36a to 36f, 26d are supplied to the combination calculation unit 42.
Measurement signals 6a and 26b are supplied (see c in the same figure). The combination calculation unit 40 of the calculation unit 38d is supplied with the weighing signals of the weighing machines 32a to 32f, 26a, 26b, and 26c, and the combination calculation unit 42 is supplied with the weighing signals of the weighing machines 36a to 36f, 26d ( (See figure d). The combination calculation unit 40 of the calculation unit 38e includes weighing machines 32a to 32f, 26a,
26c, 26d are supplied, and the combination calculation unit 42 is supplied with weighing signals 36a to 36f, 26b.
A weighing signal is supplied (see e in the same figure). The combination calculation unit 40 of the calculation unit 38f is supplied with the weighing signals of the weighing machines 32a to 32f, 26a to 26d, and the combination calculation unit 42 is supplied with the weighing signals of the weighing machines 32a to 32f, 26a to 26d.
A measurement signal of 6f is supplied (see f in the same figure). The combination calculation unit 40 of the calculation unit 38g includes a weighing machine 32a.
Weighing signals from weighing machines 36a to 36f, 26c are supplied to the combination calculation unit 42.
Measurement signals 6a, 26b, and 26d are supplied (see g in the same figure). Combination calculation unit 40 of calculation unit 38h
are supplied with the weighing signals of the weighing machines 32a to 32f, 26a, and the combination calculation unit 42 is supplied with the weighing signals of the weighing machines 36a to 32f, 26a.
Measurement signals a to 36f, 26b, 26c, and 26d are supplied (see h in the figure). The combination calculation unit 40 of the calculation unit 38i is supplied with the weighing signals of the weighing machines 32a to 32f, and the combination calculation unit 42 is supplied with the weighing signals of the weighing machines 36a to 36f, 26a to 26d (see i in the figure). ).

Combination calculation unit 4 of each calculation unit 38a to 38i
0 and 42 combine various supplied weighing signals, select a combination of weighing machines in which the sum of the combined weighing signals is equal to or close to the set weight, and store the combination in the combination storage units 44 and 45. With,
The deviation between the sum of the combined weighing signals at the selected location and the set weight is stored in the deviation storage sections 46 and 48.
Each of the calculation units 38a to 38i also performs the above-described operations simultaneously. In each calculation unit 38a to 38i, the deviations stored in the deviation storage units 46 and 48 are added together in an adder 50, and a discrimination device 52
supplied to

The discrimination device 52 selects the smallest of the supplied added deviations, and selects the combination storage unit 44 of the arithmetic unit that has supplied the smallest added deviation.
The articles to be weighed are put into the collection chute 2 from each weighing machine based on the stored value of 45. For example, Figure 5b
In the case of , the added deviation is the minimum and the weighing machine 32
A suitable combination of a, 32b, 32e, 26c is 1
Weighing machines 36b, 36e, 36f, 26
If one suitable combination is obtained in step d, the gates 30 of the weighing machines 32a, 32b, 32e open,
Also, the gate 22 of the weighing machine 26c is heard, and the articles to be weighed are put into the first chamber 4 from these weighing machines 32a, 32b, 32e, 26c, and the weighing machine 36b,
The gates 34 of 36e and 36f are opened, and the gate 24 of weighing machine 26d is opened, and these weighing machines 36
Articles to be weighed are put into the second chamber 6 from the chambers b, 36e, 36f, and 26d. A new article to be weighed is loaded from the supply hopper into the weighing machine into which the article to be weighed has been input, and the combination is again performed as described above.

A second embodiment is shown in FIG. In this embodiment, the collection chute 2, the weighing machines 26a to 26d,
The arrangement of 32a to 32f and 36a to 36f is the same as in the first embodiment, so detailed explanation will be omitted. In this embodiment, weighing machines 32a to 32f,
The measurement signals 26a to 26d are sent to the combination calculation unit 54.
The combination calculation unit 54 variously combines these supplied weighing signals, selects one that is equal to or close to the set weight from the sum of these combined weighing signals, and selects one that is equal to or close to the set weight. The combination of weighing machines corresponding to the sum of the weighing signals is stored in the combination storage section 56. Based on the values stored in the combination storage section 56, the weighing machines 32a to 32f, 26a to 2
The article to be weighed from the weighing machine in 6d is transferred to the first room 4.
will be put into the For example, if the weighing machines 32a, 32b, 32f, and 26a are stored in the combination storage unit 56, the gates 30 of the weighing machines 32a, 32b, and 32f open, the gate 24 of the weighing machine 26a opens,
Articles to be weighed are fed into the first chamber 4 from these weighing machines 32a, 32b, 32f, and 26a, and new articles to be weighed are fed into these weighing machines 32a, 32b, 32f, and 26a from the supply hoppers.

When the articles to be weighed are loaded into the first chamber 4 from the weighing machines 32a, 32b, 32f, and 26a, the combination calculation unit 54 supplies a combination start signal 60 to the combination calculation unit 58. As a result, the combination calculation unit 5
8 is a weighing machine 26a to 26d, 36a to 36
However, the combination storage unit 56 stores a weighing machine 26a that can be loaded into both the first and second chambers 4 and 6 and has already loaded articles to be weighed. As a result, the combination prohibition section 62 supplies the combination prohibition signal for the weighing machine 26a to the combination calculation section 58, so the combination is performed excluding the weighing signal of the weighing machine 26a,
A weight equal to or close to the set weight is selected and stored in the combination storage section 64. For example, the combination storage unit 60 stores the weighing machines 26d, 36a, 36b, 36f.
is stored, the weighing machines 36a, 36
The gates 34 of the weighing machines 36a, 36f, and 36f are opened, and the gate 24 of the weighing machine 26d is opened, and articles to be weighed are loaded into the second room 6 from the weighing machines 36a, 36b, 36f, and 26d, and the weighing machines 36a are empty. ,3
6b, 36f, and 26d are newly supplied with articles to be weighed from the supply hopper.

The combination calculation unit 58 includes weighing machines 36a, 36b,
When the articles to be weighed are input from 36f and 26d, a combination start signal 66 is supplied to the combination calculation unit 54 to restart the combination again. At this time, the weighing machines 32a, 32b, 32 that discharged the article to be weighed
The loading of the articles to be weighed into the weighing machines 32a to 32a has already been completed, and the combination calculation unit 58
Although various combinations of the weighing signals of f, 26a to 26d are attempted, the combination prohibition section 68 generates a combination prohibition signal to the weighing machine 26d, and performs the combination by excluding the weighing signal of the weighing machine 26d. The reason why the combination prohibition section 68 generates a combination prohibition signal to the weighing machine 26d is because the weighing machine 26d was previously selected as a combination by the combination calculation section 58 and is currently supplying articles to be weighed. . Thereafter, articles to be weighed are alternately put into the first chamber 4 and the second chamber in the same manner.

FIG. 7 shows a third embodiment. This example is
In the first embodiment, at the position where the weighing machines 26a to 26d having two input gates 22 and 24 are provided,
In place of these, weighing machines 72a to 72d each having one charging gate 70 are provided, and auxiliary tanks 78a to 78d having two charging gates 74 and 76 are provided below these weighing machines 72a to 72d. Of course, in the auxiliary tanks 78a and 78b, by opening the input gate 74, the article to be weighed can be thrown into the first chamber 4, and by opening the input gate 76, the article to be weighed can be thrown into the first extension part 16. Similarly, in the auxiliary tanks 78c and 78d, by opening the input gate 76, the article to be weighed can be thrown into the second chamber 6, and by opening the input gate 78, the article to be weighed can be thrown into the second extension part 18. .

These auxiliary tanks 78a to 78d are equipped with a weighing machine 7.
2a to 72d, the articles to be weighed are input to the input gate 70.
The weighing signals from the weighing machines 72a to 72d at that time are stored in a suitable memory (not shown). Then, new articles to be weighed are put into the weighing machines 72a to 72d, and these weighing signals are transmitted to the stored values in the memory and to the other weighing machines 32a.
A combination calculation is performed in the same manner as in the first embodiment and the second embodiment together with the measurement signals of 32f to 36a to 36f.

In this way, the number of weighing signals to be combined can be increased without increasing the number of actual weighing machines, so accuracy can be improved. Alternatively, the same accuracy as in the first and second embodiments can be achieved with a smaller number of weighing machines than in the first and second embodiments.

In the above embodiment, the supply ports 8 and 10 of the first chamber 4 and the second chamber 6 are both circular, but they may have other shapes, such as rectangular or triangular shapes. As the combination calculation units 40, 42, 54, and 58, various known units can be used. It is also possible to use a method that selects the first weight that falls within the range of the allowable upper limit weight and allowable lower limit weight.
In the third embodiment, the articles to be weighed in the weighing machines 72a to 72d are transferred to the auxiliary tanks 78a to 78d.
The auxiliary tanks 78a to 78d can also be used like a sorting device without being transferred.

[Brief explanation of drawings]

FIG. 1 is a front view of a first embodiment of a combination weigher according to the present invention, FIG. 2 is a plan view of the first embodiment,
3 is a sectional view taken along line A-A in FIG. 2, FIG. 4 is a block diagram of the first embodiment, and FIGS. 5 a to i
6 is a diagram schematically representing a weighing machine that supplies weighing signals to the combination calculation section of each calculation device of the first embodiment, FIG. 6 is a block diagram of the second embodiment, and FIG.
The figure is a partially omitted sectional view of the third embodiment. 2... Collection chute, 3... Partition wall, 4... First room, 6... Second room, 12, 14... Outlet, 16... First extension, 18... Second extension Part, 20, 28... Boundary part, 26a to 26d,
78a to 78d...accommodating tanks 32a to 32 having input ports both in the direction of the room and in the direction of the extension part
f, 36a to 36f...Accommodation tank having one input port.

Claims (1)

[Claims] 1 Divide one collective chute into a first and second room approximately in the center by a partition wall, and
and a discharge port is provided at the bottom of the second chamber, respectively.
Providing a first extension part communicating with the second room outside the first room near one end of the partition wall,
Providing a second extension part communicating with the first room on the outside of the second room near the other end of the partition wall,
an article storage tank having an input port in both the direction of the room and the direction of the extension above the boundary between the first chamber and the first extension and the border between the second chamber and the second extension; and an article storage tank having one input port above the first and second chambers other than the boundary part.