JPH0533729B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field of the Present Invention> The present invention combines the weight values of objects to be weighed stored in a plurality of weighing hoppers from a plurality of pool hoppers, and collectively transfers the target weight onto a conveyor. The present invention relates to a combination weighing device for discharging, and particularly to a combination weighing device for manually feeding objects to be weighed into a pool hopper.

<Prior art> (Fig. 8) A combination weighing device is used to efficiently collect target weights of objects to be weighed, such as confectionery, fruits, vegetables, or meat, which have individual weight variations. For objects to be weighed that are large in shape (e.g. cabbage, broilers, etc.), it is recommended to feed the objects manually to prevent damage to the objects due to falling during conveyance, feeding, and discharge operations. Manual input type combination weighing devices have been used in the past.

In this type of combination weighing device, multiple weighing hoppers are installed for one pool hopper in order to efficiently manually feed the objects to be weighed and to increase the accuracy of combining the objects with respect to the target weight of the objects. There are things that are.

FIG. 8 shows an example of such a conventional combination weighing device.

In the figure, each pool hopper 1 _-1 is manually set.
The objects to be weighed placed in ~1 _-o are placed in weighing hoppers _2-1 ~2 _-o , _3-1 , two of which are placed below each.
~3 _- accommodated on one side of -o, then pool hopper 1
The objects to be weighed placed in _-1 to 1 _-o are respectively accommodated in the weighing hopper on the other side.

The weighing hoppers _2-1 to 2 _-o and _3-1 to 3 _-o are provided with weighing instruments 4-1 _{to 4-o and 5-1 to 5-o, respectively, and the weighing hoppers 2-1 to 2-o and 3-1 to 3-o are provided with weighing devices 4-1} to 4 _-o and 5-1 _to 5 _{-o, respectively, and the weighing hoppers 2-1 to 2-o and 3-1 to 3-o} are provided with weighing instruments 4-1 to 4-o and 5-1 to 5-o, respectively, and the stored objects to be weighed are The weight of each is measured. During this weighing, objects to be weighed are put into each pool hopper 1 _-1 to 1 _-o . After this input is completed, when a combination signal is input by operating a foot switch or the like, the control unit (not shown) controls each measuring instrument 4.
Based on the weighing values from _-1 ~ 4 _-o , 5 _-1 ~ 5 _-o ,
The optimal combination for the target weight of the objects to be weighed is selected, and the objects to be weighed in the weighing hopper with the selected combination are discharged, collected by a collecting conveyor 6, etc., and conveyed to a packaging machine (not shown), etc. .

It should be noted that during this discharge collection operation, objects to be weighed from the corresponding pool hopper are stored in the weighing hoppers that have been selected in combination and become empty.

Furthermore, when an object to be weighed is manually put into the empty pool hopper, a combination signal is input in the same manner as described above, and the combination selection operation is performed by the control unit.
The target weight of objects to be weighed is discharged onto the collection conveyor 6 and collected.

<Problems to be Solved by the Present Invention> However, in the conventional combination weighing device as described above, a weighing device is provided for each weighing hopper, resulting in an increase in cost.

In addition, since measuring instruments require frequent adjustment, there is also the problem that maintenance becomes complicated when there are a large number of measuring instruments.

In order to solve this problem, a method can be considered in which the weight of objects to be weighed in two weighing hoppers is alternately measured using one weighing device, as described in Japanese Patent Application Laid-Open No. 60-50423. According to this method, it is possible to measure the weight of the objects to be weighed in the same number of weighing hoppers as in the conventional weighing hopper using fewer scales. However, this method does not reduce the number of weighing hoppers itself, so even if each weighing hopper is arranged on a collection conveyor and a pool hopper is provided above each pair of weighing hoppers, the pool hopper is The distance between the weighing objects becomes wide, making it difficult to manually insert objects to be weighed, which is extremely inefficient, and damage caused by throwing objects into the weighing chamber.

In addition, a hopper, such as the intermediate hopper described in Japanese Utility Model Publication No. 43-9539, which is configured to partition the interior into two chambers with a partition wall and open and close the side panels for each chamber, can be used as a weighing hopper. can also be considered.

However, like this intermediate hopper, a weighing device with a structure in which two side plates as gates are provided on the same side of the hopper and the intermediate hopper is supported by the weighing machine body from the opposite side of the side plates is installed along the collecting conveyor. When considering arranging them side by side, each weighing device must be arranged so that the opening/closing direction of each side plate of the intermediate hopper is in the width direction of the collecting conveyor.
Unless a collection conveyor that is wider than necessary is used, or a separate hopper or the like is not provided, the discharged articles will spill to the side of the collection conveyor.

<Object of the Invention> An object of the present invention is to provide a combination weighing device in which manual loading of objects to be weighed is easy and the objects to be weighed do not spill to the side of a collection conveyor.

<One Embodiment of the Present Invention> (FIGS. 1 to 6) Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a schematic plan view of the combination weighing device of the present invention, and FIG. 2 is a sectional view taken along the line -' in FIG. 1.

In the figure, the upper surface 15a of the housing 15 has N input ports 15b _-1 to 15 in the length direction of the housing 15.
b _-o is provided.

Pool hoppers 30 _-1 to 30 _-o are arranged below each input port 15b _-1 to 15b _-o , and weighing hoppers 40 _-1 to ₄₀ are arranged below each pool hopper 30 _-1 to 30 -o, respectively. _-o is placed. Each pool hopper 30 _-1 to 30 _-o and each weighing hopper 40 _-1 to 40 _-o are removably attached to each front part of the control housing 20 _-1 to 20 _-o each formed in a rectangular parallelepiped shape. . Each control housing 20 _-1 to _{20 -o}
are arranged in a line on one side of the conveyor 53, which will be described later, along its length.

At the top of the front part of the control housings 20 _-1 to 20 _-o ,
Slide forward and each pool hopper 30 _-1 ~ 3
A plate-shaped shutter 21 _-1 to 21 that closes the opening surface of 0 _-o
-o is provided.

Furthermore, inside the control housings 20 _-1 to 20 _-o , there are measuring instruments 26 _-1 to 26 _-o , pool hoppers 30 _-1 to 30 _-o , and weighing hoppers 40 _{-1 to} 40, respectively.
Open and close the discharge gate of 0 _-o , and release the shutter 21 _-1 ~
An opening/closing drive device (not shown) for driving 21 _-o is housed therein, and all of this opening/closing drive device is controlled by a control section to be described later.

FIG. 3 shows one control housing 20 -1 among the control housings 20 _-1 to 20 _-o , and this control housing _{20 -1 .}
It is a figure showing pool hopper _30-1 and weighing hopper _40-1 supported by.

In the figure, the front part 20a _-1 of the control housing 20 _-1
A support plate _22-1 is attached to the upper side of the support plate 22-1, which is formed in a U-shape and has both opposing pieces protruding toward the front side of the front surface portion 20a _-1 . This support plate 22 _-1
supports Poolhoppa 30 _-1 ,
For this purpose, two grooves 20a _-1 and 22b _-1 are provided at the front and rear in the upper portions of the opposing pieces. Groove 2
The groove 0a _-1 is formed downward from the front upper end of both opposing pieces, and the groove 20b _-1 is formed diagonally downward from the rear upper end.

The support plate 22 _-1 has grooves 23a -1 and 23b -1 formed below the support plate 22 _-1 in the same way as the support plate 22 -1 for locking the weighing hopper 40 _-1 , and has grooves 23a _-1 and 23b _-1 in the control housing 20 _-1. A support plate 23 directly connected to a measuring instrument 26 _-1 housed in
_-1 is provided.

In addition, below both support plates 22 _-1 and 23 _-1 , a pool hopper 30 _-1 and a weighing hopper 40 _-1 are provided.
A drive lever 24 is rotatably connected to an opening/closing drive device in the control housing 20 _-1 to drive opening/closing.
a _-1 , 25a _-1 and 25b _-1 are provided, respectively.

As shown in FIGS. 3 and 4, the pool hopper 30 _-1 is open at the top and has a substantially inverted triangular cross section, and the open sloped portions on both sides of the bottom are provided with discharge gates 31 _-1 and 30 -1 , respectively. 32 _-1 is attached rotatably in both outward directions.

The discharge gates 31 _-1 and 32 _-1 are provided so that their lower edges abut each other downward, and a bent portion 31a _- bent from the contact portion in the direction of inclination of each discharge gate. ₁ and 32a _-1 are formed, respectively.

Further, a separation plate 33 _-1 formed to connect the front side and the back side of the pool hopper 30 _-1 in a U-shape is attached to the pool hopper 30 _-1 .
The bottom portion 33a _-1 is formed to have a triangular cross section along the bent portions 31a _-1 and 32a _-1 of the discharge gates 31 _-1 and 32 _-1 .

_Arm parts 33b _-1 and 33c _-1 are formed symmetrically on the upper part of the separation plate 33 -1 on the back side of the pool hopper 30 _-1 , and the respective arm parts 33b _-1 and 33c _-1
At the tip, there is an actuating piece 34 formed in a dogleg shape.
_-1 and 35 _-1 are mounted so as to be rotatable about their central portions as fulcrums. The arm portion 31 of the discharge gate 31 _-1 , 32 _-1 is attached to one end side of the actuating piece 34 _-1 , 35 _-1 .
b _-1 , 32 Connecting plate 3 rotatably attached to b _-1
6 _-1 and 37 _-1 are rotatably attached.

In addition, the operating pieces 34 _-1 , 35 _-1 and the connecting plate 36 _-1 ,
A spring 38 _-1 is locked between each connecting portion of 37 _-1 , and the actuating pieces 34 _-1 and 35 _-1 receive an inward force due to this spring 38 _-1 . _The stoppers 33d _-1 and 33e -1 protruding from the upper parts of the arms 33b _-1 and 33c _-1 of the separation plate 33 _-1 are actuating pieces 34
_-1 , 35 Since it is in contact with _-1 , both discharge gates 3
When 1 _-1 and 32 _-1 are closed, the actuating piece 34
_-1 , 35 _-1 and the connecting plates 36 _-1 , 37 _-1 are arranged substantially on a straight line.

At the upper part of the back side of the pool hopper 30 _-1 , there is a support plate 22 of the control housing 20 _-1 for controlling the pool hopper 30 _-1 .
_-1 , a U-shaped locking portion 39 _-1 is provided. The locking portion 39 _-1 is formed by horizontally suspending two front and rear support rods 39c _-1 and 39d _-1 between opposing pieces 39a _-1 and 39b _-1 .

The pool hopper 30 _-1 is connected to the second part of this locking part 39 _-1 .
Book support rods 39c _-1 and 39d _-1 are connected to grooves 22a _-1 and _{22b -1 provided at the front and rear of support plate 22 -1 of} housing 20 -1.
are respectively locked and attached to the control housing 20 _-1 .

In addition, the discharge gate 31 of the pool hopper _30-1
-1 , 32 While one of _-1 is open, control housing 2
The shutter 21 _-1 of 0 _-1 is controlled to slide forward and close the opening surface of the pool hopper 30 _-1 .

The weighing hopper _40-1 disposed below the pool hopper _30-1 has an internal volume approximately twice that of the pool hopper _30-1 , and is formed in a substantially similar shape.

That is, the weighing hopper _40-1 is
As shown in the figure, the upper part is open and the cross section is formed into an approximately inverted triangular shape, and discharge gates 41 _-1 and 42 _-1 are attached to the inclined parts on both sides.

In addition, at the bottom of the discharge gates 41 _-1 and 42 _-1 ,
Bent parts 41a _-1 and 42a _-1 are formed which are bent in the direction of inclination of the respective discharge gates, and similarly to the pool hopper 30 _-1 , these bent parts 41a _-1 and 42a _-1
A bottom portion 43a _-1 with a triangular cross section formed along
The U-shaped separation plate 43 _-1 having a
It is installed to connect the front and back sides of the _0-1 .

Arm parts 43b -1 _and 43c -1 are formed symmetrically on the upper _part of the separation plate 43 _-1 on the back side of the weighing hopper 40 _-1 , and the tips of the arm parts 43b _-1 and 43c _-1 are Similarly to the pool hopper, actuating pieces 44 _-1 , 45 _-1
is rotatably mounted, and further includes operating pieces 44 _-1 ,
One end of the discharge gate 45 _-1 and the arm portions 41b _-1 and 42b _-1 of the discharge gates 41 _-1 and 42 _-1 are connected via connecting plates 46 _-1 and 47 _-1 , respectively.

Actuation pieces _44-1 , _45-1 and connecting plates _46-1 , _47-1
A spring 48 _-1 is locked between the connecting parts of the separation plate 43 -1 and the arm parts 43b _-1 of the separation plate 43 _-1 , similar to the pool hopper.
Stopper 43d _-1 , 4 protruding from the top of 43c ₁
3e _-1 stops the movement of the actuating pieces 44 _-1 and 45 _-1 inward.

In addition, in the center of the interior of the weighing hopper _40-1 , the lower ends are connected to the bent portions 41a _{-1 of} the discharge gates 41-1, _42-1 ,
Partition plate 49 provided so as to come into contact with 42a _-1
-1 is attached, and the inside of the weighing hopper 40 _-1 is divided into two storage chambers 50 by this partition plate 49 _-1 .
_-1 , 51 _-1 .

On the upper back side of the weighing hopper 40 _-1 , there is a locking portion 52 formed in a U-shape in order to lock the weighing hopper 40 _-1 to the support plate _{23 -1} of the control housing 20 -1.
_-1 is provided. This locking portion 52 _-1 , like the locking portion 39 _-1 of the pool hopper 30 _-1 , has two front and rear support rods 52c _-1 and 52d _-1 between opposing sides 52a _-1 and 52b _-1 . is formed by being suspended horizontally.

The weighing pad 40 _-1 is supported by the measuring device 26 _-1 with the locking portion 52 _-1 locked to the support plate 23 _-1 of the control housing 20 _-1 .

Pool hopper _30-1 and weighing hopper _40-1
When installed on the control housing front section 20a _-1 ,
Each hopper operating piece 34 _-1 , 35 _-1 , 44
_-1 , 45 The free end side of _-1 is the front side of the control housing 20
Drive levers 24a _-1 , 24b _-1 provided on a _-1 ,
They are located at the bottom of 25a _-1 and 25b _-1 , respectively. Therefore, for example, the actuating piece 4 of the weighing hopper 40 _-1
When _4-1 is rotated counterclockwise (in FIG. 3) by drive lever 25a _-1 , one end of _44-1 is rotated outward, and the lower end of connecting plate _46-1 is pulled outward and downward. Therefore, the discharge gate _41-1 is opened. When the drive lever 25a _-1 returns, one end of the actuating piece _41-1 (lower end of the connecting plate _46-1 )
8 Returns to the inside by the biasing force of _-1 and exits the discharge gate 4.
1 _-1 will be closed. This opening/closing operation is the same for the discharge gate 42 _-1 on the opposite side.
In addition, other weighing hoppers 40 _-2 to 40 _-o and pool hopper 30 having exactly the same configuration as weighing hopper 40 _-1
Other pool hoppers 30 with exactly the same configuration as _{-1 -2} ~ 3
The opening/closing operation of 0 _-o is also similar.

In addition, in FIGS. 4 and 5, the pool hopper 30
_-1 and weighing hopper 40 _-1 's right discharge gate 3
2 _-1 and 42 _-1 are shown opened from the back side.

Below each weighing hopper _40-1 to 40 _-o , there is a second
As shown in the figure, a conveyor 53 is provided for receiving the objects to be weighed discharged from the weighing hoppers 40 _-1 to 40 _-o and conveying the objects to be weighed.

The conveyor 53 is connected to a packaging machine 54, and the objects to be weighed conveyed by the conveyor 53 are packaged together by the packaging machine 54.

Note that the driving of the shutters 21 _-1 to 21 _-o and the opening and closing of the discharge gates of each hopper are performed by a control section. FIG. 6 is a diagram showing a schematic configuration diagram of this control section.

In the figure, 55 _-1 to 55 _-o represent each measuring instrument 26
_-1 ~ 26 _- Upon receiving the weighing signal from -o, each weighing hopper 40 _-1 ~ 40 _-o 's storage chamber 50 _-1 ~ 50 _-o , 51
_-1 to 51 _-o is a weight value calculation circuit that calculates the weight value of the object to be weighed stored in -o and stores the calculated weight value.

56 performs a combination calculation on all different combinations based on each weight value from the weighing value calculation circuits 55 _-1 to 55 _-o each time the combination signal A is input, and selects the optimum combination for the target weight. , is a combination selection circuit that outputs this selection signal.

This combination signal A is input by operating a foot switch or the like, for example.

57 is a discharge control device which receives a selection signal from the combination selection circuit 56 and sends a discharge signal to the opening/closing drive device in the control housing corresponding to the selection signal to discharge the objects to be weighed whose combination has been selected. .

This discharge control device 57 opens the discharge gate of the pool hopper corresponding to the discharged and empty storage chamber in response to the storage signal, and stores the objects to be weighed in the pool hopper in each storage chamber.

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

It is assumed in advance that no object to be weighed is stored in any of the pool hoppers 30 _-1 to 30 _-o and weighing hoppers 40 _-1 to 40 _-o .

Here, when the objects to be weighed are manually input into each pool hopper 30 _-1 to 30 _-o from the input ports 15b _-1 to 15b _-o , the objects to be weighed are stored in the weighing hoppers 40 _-1 to 40 _-o . Therefore, each control housing 20 _-1 to _{20 -o} is
Drive lever 24a _-1 on one side (for example, left side) of
24a _-o rotate counterclockwise (in Figure 3). For this reason, each pool hopper 30 _-1 ~ 30 _-o
The operating pieces 34 _-1 to 34 _-o on one side rotate and the lower ends of the connecting plates 36 _-1 to 36 _-o are pulled outward and downward, so that the discharge gates 31 _-1 to 31 _-o on one side rotate. Open,
The objects to be weighed stored in each pool hopper 30 _-1 to 30 _-o are discharged.

While the discharge gates 31 _-1 to 31 _-o are open,
Each shutter 21 _-1 to 21 _-o has its own input port 1.
5b _-1 to 15b _-o are blocked to prevent incorrect input.

The objects to be weighed discharged from each pool hopper 30 _-1 to 30 _-o are transferred to weighing hoppers 40 _-1 to 40 _-o, respectively.
are stored in storage chambers 50 _-1 to 50 _-o on one side of the storage chambers 50 -1 to 50 -o.
This measured value is measured by each of the measuring instruments 26 _-1 to 26 _-o , and in the measured value calculation circuits 55 _-1 to 55 _-o , the weighed objects stored in the left side storage chambers 50 _-1 to 50 _-o are measured. is stored as a weight value.

When the objects to be weighed are stored in each weighing hopper 40 _-1 to 40 _-o and the discharge gates 31 _-1 to 31 _-o of each pool hopper 30 _-1 to 30 _-o are closed, each shutter 21 _-1
~21 _-o are housed in the control housings _20-1 ~20 _-o , and each input port 15b _-1 ~15b _-o is opened.

When the next object to be weighed is put into the pool hopper 30 _-1 to 30 _-o , the other side (right side) discharge gate 32 _-1 to
32 _-o is opened, and the objects to be weighed are stored in the storage chambers 51 _-1 to 51 _-o on the other side of the weighing hoppers 40 _-1 to 40 _-o .

This measured value is calculated by the measured value calculation circuit 55 _-1 to 55 _-o
The weight values of the objects to be weighed stored in the left storage chambers 50 _-1 to 50 _-o are subtracted from each of the measured values, and the subtraction results are sent to the right storage chambers 51 _-1 to 50 -o.
51 _-o are respectively stored as weight values of the objects to be weighed.

Here, when the combination signal A is input by operating a foot switch or the like, the weighing value calculation circuit 55 _-1
Based on each weight value stored in ~55 _-o , the optimal combination for the target weight is selected.

At this time, for example, if the object to be weighed stored in the left storage chamber 50 _-1 of the weighing hopper 40 _-1 is selected in combination with the objects to be weighed in other weighing hoppers,
In response to a discharge signal from the discharge control device 57, the drive lever 25a _-1 rotates, and the operating piece _44-1 of the weighing hopper _40-1 rotates, so the discharge gate _41-1 opens and the storage chamber _{50-1 is rotated.} The object to be weighed stored in ₁ is
The objects to be weighed are discharged to the conveyor 53 together with other objects to be weighed that have been selected for combination.

At this time, each discharge gate opens along the length direction of the conveyor 53, and the bottom 43 of the separating plate _43-1
Since a _-1 is also inclined in the opening direction of the discharge gate,
The objects to be weighed in the weighing hopper fall onto the conveyor 53 along the length of the conveyor 53.

The objects to be weighed discharged onto the conveyor 53 are conveyed to a packaging machine 54 and packaged.

When the storage chamber 50 _-1 is empty, the discharge control device 57
In response to the storage signal, the drive lever 24a _-1 is driven, the discharge gate _31-1 of the pool hopper _30-1 is opened, the next object to be weighed is stored in the storage chamber _50-1 , and its weight value is stored. be done.

Thereafter, in the same manner, the objects to be weighed whose combinations have been selected are sequentially discharged each time the combination signal A is input.

<Other Embodiments of the Present Invention> (Fig. 7) In the above embodiments, the inlets for objects to be weighed were arranged in one line in the length direction of the device, but as shown in Fig. 7, The input ports for the objects to be weighed may be arranged in two rows, with the control casings facing each other. With the arrangement in two rows as described above, the length of the apparatus can be shortened, and the conveyance pitch of the conveyor 53 can be reduced.

<Effects of the present invention> As explained above, the combination weighing device of the present invention divides the inside of each weighing hopper arranged above the conveyor into two storage spaces arranged in the length direction of the conveyor. The conveyor is divided into chambers, and the discharge gate for each storage chamber is spaced apart along the length of the conveyor from a position where its lower edge abuts the lower part of the partition plate.

Therefore, the objects to be weighed can be discharged almost directly below the storage chamber or along the length of the conveyor, so there is no need to use an unnecessarily wide conveyor or other hoppers. No more spilling to the sides.

In addition, an independent storage room is provided within the weighing hopper.
Moreover, since each hopper is supported by a control housing placed on the side of the conveyor, the spacing between the pool hoppers can be narrowed, making manual loading of objects to be weighed much easier, and there is less damage to objects due to throwing etc. It's done.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view showing one embodiment of the present invention, and FIG. 2 is a sectional view taken along the line -' in FIG.
FIG. 3 is a perspective view showing the main parts of the embodiment, FIG. 4 is a rear view of the pool hopper of the embodiment, and FIG. 5 is a rear view of the weighing hopper of the embodiment. FIG. 6 is a schematic block diagram showing the control section of the embodiment, FIG. 7 is a schematic plan view showing another embodiment of the present invention, and FIG. 8 is a schematic diagram of a conventional device. 15b _-1 ~15b _-o ... Input port, 20 _-1 ~20 _-o
...Control housing, 21 _-1 to 21 _-o ...Shutter, 2
6 _-1 ~ 26 _-o ... Measuring instrument, 30 _-1 ~ 30 _-o ... Pool hopper, 31 _-1 ~ 31 _-o , 32 _{-1 ~} 32 _-o ...
...Discharge gate, 33 _-1 ~ 33 _-o ... Separation plate, 40
_-1 ~40 _-o ...Weighing hopper, 41 _-1 ~41 _-o ,4
2 _-1 ~42 _-o ...Discharge gate, 43 _-1 ~43 _-o ...
...Separation plate, 49 _-1 ~ 49 _-o ...Partition plate, 50 _-1 ~
50 _-o , 51 _-1 ~ 51 _-o ... storage room, 53 ... conveyor, 55 _-1 ~ 55 _-o ... weighing value calculation circuit, 5
6... Combination selection circuit, 57... Emission control device.

Claims (1)

[Scope of Claims] 1. A conveyor of a predetermined length, and a plurality of conveyors arranged in parallel above the conveyor along the length direction of the conveyor, the inside of which is separated by a partition plate erected in the center thereof. A weighing hopper is divided into two storage chambers lined up in the length direction, and each storage chamber of the weighing hopper is installed independently, and the lower edge of the weighing hopper is in contact with the lower part of the partition plate to separate the storage chambers. a discharge gate that closes the lower surface and opens the lower surface of the storage chamber by separating the lower edge from the lower part of the partition plate along the length of the conveyor; and disposed above the plurality of weighing hoppers, respectively; There is a discharge gate corresponding to each storage chamber of the lower weighing hopper, and by opening or closing either one of the discharge gates, the object to be weighed that has been manually fed is transferred to the empty storage chamber of the corresponding weighing hopper. a plurality of pool hoppers for supplying water to a plurality of pool hoppers; a control housing disposed on the side of the conveyor along the length direction of the conveyor and supporting the plurality of weighing hoppers and pool hoppers above the conveyor; and a control housing provided in the control housing. , a plurality of weighing instruments each detecting the weight of the objects to be weighed stored in the plurality of weighing hoppers; and determining the weight of the objects to be weighed in the plurality of storage chambers from the weighing signals of the plurality of weighing instruments; A combination weighing device comprising: a control unit that selects a combination close to or equal to a target weight from among the combinations of weight values obtained, and discharges the selected objects to be weighed from each storage chamber onto the conveyor.