JP2005201787A - Combined weighing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combined weighing device capable of preventing efficiently a defective combination from being generated to enhance an operation rate, even when supplying a weighing object by a feeder of an unstable feed amount such as a vibration feeder. <P>SOLUTION: This combined weighing device 1 is provided with a dispersion table 2, the plurality of supply feeders 3 arranged in a periphery of the dispersion table 2, a plurality of pool hoppers 4, weighing hoppers 5 and booster hoppers 6, a centralized discharge chute 7, and a control part 90. The control part 90 controls the supply feeders 3 to supply the object different in the weight to the same pool hopper 4 in every one cycle, in the combined weighing device 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a combination weighing device that performs combination weighing using the weights of objects to be weighed supplied to a plurality of containers for storing the objects to be weighed.

In general, a combination weighing device is used to measure an object to be weighed, such as confectionery and fruit, which varies in weight, at high speed and with high accuracy. The combination weighing device is configured to combine the respective measurement values of the objects to be measured, select a combination of hoppers that becomes a measurement value within a predetermined allowable range, and discharge the objects to be measured.
Such a combination weighing device usually has a plurality of weighing hoppers, and in order to prevent the objects having the same weight from being stored in the plurality of weighing hoppers to reduce the number of combination patterns, It is devised to supply objects to be weighed with different weights for each hopper.

For example, Patent Literature 1 discloses a combination weighing device that varies the weight of objects to be weighed supplied to each hopper by periodically feeding and changing the supply time of objects to be weighed to each hopper. Has been.
Also, in Patent Document 2, a target weight of an object to be weighed into each weighing hopper is set, and a feeder drive control unit is provided with a drive feeder so that supply with a variation with respect to the target weight is performed. A combination weighing device that performs so-called slant control for setting and controlling the feed force value is disclosed.
JP 57-182127 A (published on November 9, 1982) Japanese Patent Laid-Open No. 7-128124 (published on May 19, 1995)

However, the conventional combination weighing device has the following problems.
That is, in the combination weighing device disclosed in Patent Document 1, since the supply time of the objects to be weighed from the supply unit to each hopper is periodically changed in order, the weight is statistically constant. It will be supplied repeatedly. For this reason, as a result of discharge of the objects to be weighed from the hoppers used for the combination calculation, there is a possibility that the objects to be weighed with similar weights exist in a plurality of hoppers at the same time, and the number of combinations may decrease. The variation in the weight of the objects to be weighed stored in the hopper is not sufficient.

On the other hand, the combination weighing device disclosed in Patent Document 2 is ideal because the target supply weight is theoretically different. However, at the actual machine level, the objects to be weighed are supplied to a plurality of hoppers by a supply device such as a vibration feeder whose supply amount is unstable, so that there is a possibility that the desired variation does not actually occur from the target supply weight. .
As described above, any combination weighing device disclosed in the above publication has a certain limit in terms of an increase in the number of combinations. The variation in weight is not enough.

  The problem of the present invention is that even when the object to be weighed is supplied by a supply device such as a vibration feeder that is unstable, the occurrence of a combination failure occurs while maintaining the weight variation of the object to be weighed supplied to the hopper. It is an object of the present invention to provide a combination weighing device that can efficiently prevent the above-described problem and improve the operating rate.

  The combination weighing device according to a first aspect includes a plurality of supply units, a plurality of hoppers, and a control unit. The plurality of supply units supply the objects to be weighed to the plurality of hoppers arranged on the downstream side. A plurality of hoppers are arranged on the downstream side of the plurality of supply units with respect to the individual supply units of the plurality of supply units, and store measured objects to be weighed. The control unit performs combination calculation using the weight values of the objects to be weighed stored in the plurality of hoppers, and controls supply of the objects to be weighed to the plurality of hoppers by the supply unit. Furthermore, a control part controls supply conditions so that the weight of the to-be-measured object supplied with respect to each hopper from a some supply part may differ for every cycle.

Here, the supply of the objects to be weighed by the supply unit is controlled so that the weights of the objects to be weighed supplied to each hopper from the plurality of supply units provided in the combination weighing device of the present invention are different for each cycle. Is done.
In the conventional combination weighing device, as a whole combination weighing device, a plurality of supply units individually supply objects to be weighed with different weights so that the weight values of the objects to be weighed stored in the hoppers do not overlap. As a result, the operating rate of the combination weighing device was improved. However, in such a method, although the number of combinations increases in proportion to the number of containers provided in the weighing unit, the number of combinations depends on the number of supply units, so the number of combinations increases and the operating rate is improved. Then there is a limit.

Therefore, in the combination weighing device of the present invention, a plurality of hoppers that are provided on the downstream side of each of the plurality of supply units provided in the combination weighing device and store the objects to be weighed. The supply condition of the object to be weighed is changed every cycle.
For example, in a so-called booster machine type combination weighing device having a plurality of weighing hoppers arranged on the downstream side of the supply unit and a plurality of booster hoppers arranged on the downstream side of the weighing hopper, these weighing hoppers and booster hoppers The combination weighing is performed using the weight value of the object to be weighed stored in step (b). And the control part with which the combination weighing | measuring apparatus is equipped controls the supply conditions of the to-be-measured object by a supply part so that the weight of the to-be-measured object supplied with respect to a measurement hopper may differ for every cycle. As a result, the weighing objects having different weight values can be stored in the weighing hopper arranged in series and the booster hopper on the downstream side thereof.

  On the other hand, in a so-called pair machine type combination weighing device in which a plurality of weighing hoppers are arranged in parallel on the downstream side of the pool hopper, the load stored in the plurality of weighing hoppers arranged on the downstream side of the pool hopper is also the same. Combination weighing is performed using the weight value of the weighing object. And the control part with which the combination weighing | measuring apparatus is equipped controls supply conditions so that the weight of the to-be-measured object supplied with respect to a pool hopper may differ for every cycle. Accordingly, the objects to be weighed having different weight values can be stored in the plurality of weighing hoppers to which the objects to be weighed are distributed from one pool hopper.

  From the above, the number of supply units possessed by the combination weighing device does not become the limit of the number of combinations, and the number of combinations is increased by varying the weight value of the objects to be weighed stored in each hopper. Therefore, the operating rate of the combination weighing device can be improved as compared with the conventional case. Furthermore, even when a supply unit with an unstable supply amount such as a vibration feeder is used, the supply amount from the supply unit is changed for each cycle, so that the supply amount to each hopper can be easily varied.

The control for changing the supply weight for each cycle may be performed for all the supply units or only for a predetermined supply unit. One cycle refers to one supply operation for supplying an object to be weighed from the supply unit to each hopper.
A combination weighing device according to a second aspect is the combination weighing device according to the first aspect, wherein the control unit alternately changes the supply condition for each cycle.

Here, the supply conditions of the objects to be weighed by the supply unit are alternately changed every cycle. As a result, the weight of the object to be weighed supplied to one hopper can be changed every cycle with the simplest control.
A combination weighing device according to a third aspect is the combination weighing device according to the first or second aspect, wherein the control unit controls the amplitude time of the supply unit as a supply condition.

Here, the supply amount of the object to be weighed to the hopper can be easily changed by changing the amplitude time. For example, if the amplitude time per cycle of the supply unit is doubled, the supply amount can be almost doubled. For this reason, it becomes easy to control supply amount irrespective of the kind of to-be-measured object by controlling by time.
A combination weighing device according to a fourth aspect is the combination weighing device according to any one of the first to third aspects, wherein the control unit controls the amplitude intensity of the supply unit as a supply condition.

Here, the supply amount of the object to be weighed can be changed for each cycle by changing the amplitude intensity of the supply unit. Moreover, when controlling by combining the amplitude time and the amplitude intensity in the supply unit, the weight value of the object to be weighed supplied to each hopper can be easily changed for each cycle.
A combination weighing device according to claim 5 is the combination weighing device according to any one of claims 1 to 4, wherein the hopper receives and weighs an object to be weighed supplied from a supply unit. And a booster hopper disposed on the downstream side of the weighing hopper.

Here, the present invention is applied to a so-called booster machine type combination weighing device having a plurality of weighing hoppers arranged on the downstream side of the supply unit and a plurality of booster hoppers arranged on the downstream side of the weighing hoppers. To do.
Accordingly, since the weight value of the object to be weighed supplied from the supply unit to the weighing hopper is different for each cycle, the weighing hopper arranged in series and the booster hopper on the downstream side thereof have different weight values. The object to be weighed can be stored. Therefore, it is possible to increase the number of combinations compared to the conventional booster machine type combination weighing device and improve the operating rate of the combination weighing device. In such a booster machine type combination weighing device, the weighing hopper as the storage hopper and the booster hopper are arranged in series in the vertical direction, so the number of selections in the combination calculation is increased without increasing the installation area. Can be made.

A combination weighing apparatus according to a sixth aspect is the combination weighing apparatus according to the fifth aspect, wherein the control unit receives information on the weight value of the object to be weighed stored in the booster hopper, and Determines whether or not to supply additional objects to the booster hopper.
Here, if the control unit receives information on the weight value of the weighing object stored in the booster hopper and there is too little weighing object supplied to the weighing hopper in the previous cycle, the weighing object has already been measured. It is possible to choose to additionally supply the objects to be weighed to the booster hopper to which the objects are supplied. Therefore, the booster hopper that stores the overweight object is supplied to the booster hopper that stores the overweight object that is not likely to be used for combination weighing. It is possible to prevent a reduction in operating rate due to the increase.

A combination weighing device according to a seventh aspect is the combination weighing device according to the fifth or sixth aspect, wherein the control unit sets different supply conditions for the adjacent supply units.
Here, by weighing the objects to be weighed supplied from the supply units adjacent to each other, among the weighing hoppers participating in the combination calculation, objects to be weighed with substantially the same weight are present at least in the adjacent weighing hopper or booster hopper. Prevents being stored. Thereby, the fall of the operation rate by the reduction | decrease of the number of combinations can be prevented effectively.

The combination weighing device according to an eighth aspect is the combination weighing device according to the fifth or sixth aspect, wherein the control unit sets different supply conditions for each of the supply units.
Here, the supply conditions for the weighing hopper by the supply unit are controlled so that the objects to be weighed having different weight values are supplied from the supply unit to the weighing hoppers. As a result, the objects to be weighed with different weights can be stored in all the weighing hoppers and booster hoppers. Therefore, the operating rate can be further improved by increasing the number of combinations.

The combination weighing device according to claim 9 is the combination weighing device according to any one of claims 1 to 4, wherein the hopper includes a plurality of pool hoppers that receive the objects to be weighed supplied from the supply unit. A plurality of weighing hoppers for weighing objects to be weighed are arranged on the downstream side of each pool hopper so that the objects to be weighed are distributed from the individual.
Here, the present invention is applied to a so-called pair machine type combination weighing device in which a plurality of weighing hoppers are arranged in parallel on the downstream side of the pool hopper.

  As a result, since the weight value of the objects to be weighed supplied from the supply unit to the pool hopper differs every cycle, the weighing hoppers to which the objects to be weighed are supplied from the same pool hopper have different weight values. Weighs can be stored. Therefore, it is possible to improve the operating rate of the combination weighing device by increasing the number of combinations weighing selected. In such a pair machine type combination weighing device, since a plurality of weighing hoppers serving as storage hoppers are arranged in the horizontal direction, there is little movement in the vertical direction of the objects to be weighed in the process from weighing to discharging. Therefore, the number of selections in the combination calculation can be increased while suppressing damage to the object to be weighed during movement within the apparatus.

A combination weighing apparatus according to a tenth aspect is the combination weighing apparatus according to the ninth aspect, in which the control unit sets different supply conditions for the adjacent supply units.
Here, by weighing the objects to be weighed supplied from the supply units adjacent to each other, the objects to be weighed with approximately the same weight are stored in at least the adjacent weighing hoppers among the weighing hoppers participating in the combination calculation. To prevent being in a state. Thereby, the fall of the operation rate by the reduction | decrease of the number of combinations can be prevented effectively.

The combination weighing device according to an eleventh aspect is the combination weighing device according to the ninth aspect, in which the control unit sets different supply conditions for each of the supply units.
Here, all the weighing hoppers participating in the combination calculation are controlled by controlling the supply conditions for the pool hopper by the supply unit so that the objects to be weighed having different weight values are supplied to each of the pool hoppers. Different weights can be stored. Therefore, the operating rate can be further improved by increasing the number of combinations.

  According to the combination weighing device of the present invention, the weight of the objects to be weighed stored in the hopper can be easily dispersed even when the supply unit such as the vibration feeder is unstable. The operating rate of the weighing device can be improved as compared with the conventional one.

[Embodiment 1]
[Configuration of the entire combination weighing device]
As shown in FIG. 1, the combination weighing device according to the embodiment of the present invention uses a weight value of the objects to be weighed stored in the plurality of weighing hoppers 5 and the booster hopper 6 to collect the objects to be weighed. Is a device that performs combination weighing so that a predetermined weight or a predetermined quantity is obtained.

  The combination weighing device 1 mainly includes a conical dispersion table 2 arranged immediately below a position where a supply conveyor device 40 arranged in the preceding stage drops an object to be weighed (hereinafter referred to as an article), and A plurality of supply feeders (supply units) 3 arranged around, a plurality of pool hoppers 4, weighing hoppers 5 and booster hoppers 6 arranged downstream of the supply feeder 3, a collective discharge chute 7, and details in a subsequent stage A control unit 90 (see FIG. 4) to be described.

The dispersion table 2 is an umbrella-shaped circular plate and is vibrated by an electromagnetic vibration device 2a (see FIG. 3). The article supplied to the upper surface of the dispersion table 2 moves while being dispersed toward the outer peripheral side of the circular plate by vibration, and falls onto the supply feeder 3 arranged along the outer periphery of the dispersion table 2.
As shown in FIG. 2, the supply feeder 3 includes a plurality of supply troughs 31 a to 31 d that are arranged substantially evenly in the circumferential direction around the distribution table 2. The supply trough 31 is vibrated by the electromagnetic vibration device 3 a shown in FIG. 3, and the article supplied from the dispersion table 2 is moved outward by vibration and is sent to the pool hopper 4. The supply trough 31 is a sheet metal member formed by bending a stainless steel plate. In FIG. 2, only four supply troughs 31 and four pool hoppers 4 are shown for convenience of explanation, but in actuality, twelve supply troughs 31 are arranged around the distribution table 2. .

The pool hopper 4 receives articles from the supply feeder 3 and temporarily pools them. Moreover, the gate 41 (refer FIG. 1, FIG. 4) for dropping an article | item on the measurement hopper 5 arrange | positioned downstream is provided in the lower part. The gate 41 is opened by a command from the control unit 90 (see FIG. 4) and supplies articles to the weighing hopper 5.
The weighing hopper 5 is provided on the downstream side of the pool hopper 4. A plurality of pool hoppers 4, weighing hoppers 5 and booster hoppers 6 are arranged along the circumferential direction in a one-to-one correspondence with each supply trough 31. Each weighing hopper 5 has a load cell 10 (see FIG. 4) for measuring the weight of an article in the hopper. In addition, gates 51a and 51b (see FIGS. 1 and 4) for discharging articles to the booster hopper 6 or the collective discharge chute 7 arranged on the downstream side are provided at the lower part. Gates 51a and 51b are both opened by a command from control unit 90. The gate 51a is opened when the article is discharged to the booster hopper 6. The gate 51b is opened when the articles are discharged to the collective discharge chute 7.

The booster hopper 6 is disposed on the downstream side of the weighing hopper 5 and receives and stores articles weighed in the weighing hopper 5. In addition, a gate 61 (see FIGS. 1 and 4) for dropping articles onto the collective discharge chute 7 is provided at the lower part. The gate 61 is opened by a command from the control unit 90, and the articles are discharged to the collective discharge chute 7.
The collect discharge chute 7 collects articles dropped from the weighing hopper 5 and the booster hopper 6 and then drops the articles to a subsequent apparatus such as a packaging machine.

In the combination weighing device 1 of the present embodiment, the head 8 configured by arranging the pool hopper 4, the weighing hopper 5, and the booster hopper 6 in series in the vertical direction corresponds to the plurality of supply feeders 3. A plurality are arranged in parallel. Then, the combination calculation is performed using the weight values of the weighed articles stored in the weighing hopper 5 and the booster hopper 6, and as a result of the combination calculation, the selected discharge hoppers 5, 6 perform the collective discharge chute 7. To discharge the goods.
[Control unit of combination weighing device]
As shown in FIG. 4, the combination weighing device 1 according to the present embodiment performs a combination calculation using the weight values of articles stored in the weighing hopper 5 and the booster hopper 6, and selects the articles from the selected hoppers 5 and 6. Is discharged. Furthermore, the control unit 90 includes a control unit 90 that controls the supply amount of articles supplied from the supply feeder 3 to the pool hopper 4.

  As shown in FIG. 4, the control unit 90 includes a CPU 91, ROM 92, RAM 93, and HDD 94. The control unit 90 is connected to the operation panel 95, the above-described supply feeder 3, pool hopper 4, weighing hopper 5, and booster hopper 6. A signal from the load cell 10 connected to the weighing hopper 5 and a signal from the control unit 90 are transmitted / received via a bus connected to each other.

The CPU 91 plays a central role in controlling the combination weighing device 1. The CPU 91 operates each part according to the control program.
The ROM 92 and the RAM 93 as storage means store the control program of the combination weighing device 1, the weight value of the article weighed by the weighing hopper 5, and the like.
The control unit 90 performs processing such as combination calculation based on the measurement data from the load cell 10 and controls the movement of each unit. The operation panel 95 serves as an input unit that receives input from an operator, and also serves as a display unit that performs various displays on the display screen 95a. Further, the control unit 90 receives a signal related to the weight value of the weighed article from the load cell 10 connected to the weighing hopper 5, and associates the weighed value with each of the hoppers 5 and 6 in which the article is stored. And remember. Then, a combination calculation is performed using the weight values of the articles stored in the weighing hopper 5 and the booster hopper 6, and as a result of the combination calculation, a plurality of selected weighing hoppers 5 and gates 51b included in the booster hopper 6 are included. 61 are opened, and the articles are discharged from the hoppers 5 and 6 to the collective discharge chute 7.
[Normal operation of combination weighing device]
Here, the normal operation of the combination weighing device 1 of the present embodiment will be described.

First, an appropriate amount of articles is placed on the distribution table 2 from the supply conveyor device 40 disposed on the upper part of the combination weighing device 1. The thrown-in article moves on the dispersion table 2 while being dispersed toward the outer periphery by vibration, and is conveyed to the supply feeder 3.
In the supply feeder 3, the articles dropped on the supply troughs 31 are conveyed to the pool hopper 4 while being moved outward by vibration.

Here, when no articles are stored in the weighing hopper 5 arranged on the downstream side of the pool hopper 4, the articles thrown into the pool hopper 4 are discharged from the pool hopper 4 into the weighing hopper 5. The weight of the article supplied to the weighing hopper 5 is detected by the load cell 10, and a signal related to the weight value is transmitted to the control unit 90 and stored in the RAM 93 or the like.
Next, when the article is not stored in the booster hopper 6 arranged on the downstream side of the weighing hopper 5, the article whose weight value is detected in the weighing hopper 5 enters the booster hopper 6 from the weighing hopper 5. Discharged. In this way, when the weighed article is discharged to the booster hopper 6 and the weighing hopper 5 becomes empty, the next article is discharged from the pool hopper 4 into the weighing hopper 5. The weight of the article is also detected by the load cell 10, transmitted to the control unit 90, and stored in the RAM 93 or the like. In other words, the storage means such as the RAM 93 provided in the control unit 90 stores the measured value of the previously weighed article in the current booster hopper 6 and the measured value of the currently weighed article in the current weighing hopper 5. It is stored in a state associated with the hoppers 5 and 6 that have been set.

Such control is performed for each head 8 including the pool hopper 4, the weighing hopper 5, and the booster hopper 6. Note that each time the weighing hopper 5 and the booster hopper 6 eject the articles and supply new articles, the data of the measurement values stored in association with the hoppers 5 and 6 is updated.
Based on the measurement value data in the weighing hopper 5 and the booster hopper 6, the control unit 90 performs a combination calculation so that the total weight is close to a preset target weight. That is, the control unit 90 has a weight value that is an optimal combination among the plurality of hoppers 5 and 6 so that the weight of the assembled articles matches the target weight or is close to the target weight within an allowable range. Several hoppers 5 and 6 storing articles are selected.

When the hopper used for the combination calculation is selected in the control unit 90, the gates 51 b and 61 of the corresponding hoppers 5 and 6 are opened, and articles are discharged from the hoppers 5 and 6 onto the collective discharge chute 7.
When only one booster hopper 6 is selected as a result of the combination calculation in one head 8, the gate 51a of the weighing hopper 5 is used against the booster hopper 6 which has been emptied after discharging articles. Is opened and articles are supplied from the weighing hopper 5, and new articles are supplied from the pool hopper 4 to the weighing hopper 5.

In the case where only the weighing hopper 5 is selected as a result of the combination calculation in one head 8, the gate 51 b of the weighing hopper 5 is opened, and the articles are directly discharged to the collective discharge chute 7. Then, a new article is supplied from the pool hopper 4 to the weighing hopper 5 with respect to the weighing hopper 5 which has been discharged and empty.
Further, when the hopper selected as a result of the combination calculation is both the weighing hopper 5 and the booster hopper 6 in one head 8, the gate 51b and the gate 61 are opened, and the weighing hopper 5 and the booster hopper 6 are opened. The articles are discharged directly from the discharge to the collective discharge chute 7. First, a new article is discharged from the pool hopper 4 to the weighing hopper 5 that has become empty. Further, the weighing hopper 5 measures the weight of the charged article, then opens the gate 51 a and discharges the article to the booster hopper 6. Subsequently, a new article is discharged from the pool hopper 4 to the empty weighing hopper 5, and the weighing hopper 5 weighs the inputted article again and stores it.
[Supply control of combination weighing device]
In the combination weighing device 1 of the present embodiment, the supply condition of articles supplied from the supply feeder 3 to the pool hopper 4 is set to one cycle (one supply operation performed from the supply feeder 3 to the pool hopper 4). It is controlled to change alternately every time. Specifically, the control unit 90 changes the amplitude time and / or the amplitude intensity of the electromagnetic vibration device 3a included in the supply feeder 3 as the supply condition.

For example, among the plurality of supply troughs 31a to 31d shown in FIG. 2, the control unit 90 supplies the feed feeder 3 so that the supply trough 31b and the supply troughs 31a and 31c adjacent to each other are in different supply conditions. Control the supply conditions of the goods.
Thereby, articles having different weight values can be stored in the weighing hopper 5 and the booster hopper 6 arranged on the downstream side of the pool hopper 4 provided in one head 8. Therefore, it is possible to improve the operating rate of the combination weighing device 1 by increasing the number of hoppers selected in the combination calculation. Further, by changing the article supply condition for each cycle at least with respect to the pool hoppers 4 adjacent to each other, at least the articles having substantially the same weight are stored between the adjacent weighing hoppers 5 and the booster hoppers 6. To suppress that. As a result, it is possible to prevent the articles having different weight values from being stored in the hoppers 5 and 6 and to reduce the number of combination calculations.

Furthermore, in the combination weighing device 1 of the present embodiment, the weight value of the article currently stored in the booster hopper 6 is transmitted from the load cell 10 connected to the weighing hopper 5 to the control unit 90. When the control unit 90 determines that the weight value of the article stored in the booster hopper 6 is too small as the weight value used for the combination calculation, the article is removed from the weighing hopper 5 disposed upstream thereof. Is additionally supplied. Thereby, the weight of the articles stored in the booster hopper 6 is too light, and the number of hoppers that are not used for the combination calculation increases, and the operating rate can be prevented from decreasing.
[Features of this combination weighing device]
(1)
In the combination weighing device 1 of the present embodiment, as described above, the control unit 90 changes the supply conditions of articles supplied from the supply feeder 3 to the pool hopper 4 for each cycle.

  Usually, in the conventional combination weighing device of the booster machine type, the supply condition of the articles supplied from the supply feeder to the pool hopper is constant, and the same is applied to the weighing hopper and the booster hopper arranged on the downstream side of the pool hopper. A heavy article is stored. For this reason, in the conventional combination weighing | measuring apparatus, the reduction | decrease in the number of combinations was prevented by supplying the articles | goods of a different weight value between the pool hoppers which another head (supply feeder 3) has. However, in such a conventional combination weighing device, the increase / decrease in the number of combinations in the combination calculation depends on the number of heads 8 (supply feeders 3) provided in the combination weighing device, so that the number of heads 8 is not increased. It has been difficult to increase the number of combinations and improve the operation rate.

Therefore, in the combination weighing device 1 of the present embodiment, not only the articles having different weight values are supplied from the supply feeder 3 to the respective heads 8 (each pool hopper 4), but also the same head 8 every cycle. The control unit 90 controls the supply feeder 3 so that articles having different weights are supplied.
Thereby, it arrange | positions in the downstream of the pool hopper 4, and the goods of different weight can be stored in the measurement hopper 5 and the booster hopper 6 which participate in a combination measurement. For this reason, compared with the conventional combination weighing | measuring apparatus which has the same number of heads 8, the number of the hoppers 5 and 6 in which the articles | goods of different weight are stored can be increased. As a result, the number of combinations can be increased and the operating rate of the combination weighing device 1 can be improved.

(2)
The combination weighing device 1 of the present embodiment alternately changes the supply conditions of articles from the supply feeder 3 to the pool hopper 4 every cycle.
Thus, the weight of articles supplied to one pool hopper 4 can be changed for each cycle by the simplest control of alternating supply conditions.

(3)
The combination weighing device 1 of the present embodiment uses the amplitude time and / or the amplitude intensity of the supply feeder 3 as the supply condition that is changed every cycle.
Thereby, for example, when the amplitude time is changed for each cycle, the weight of the article supplied from the supply feeder 3 can be changed almost in proportion to the amplitude time. Therefore, when the control is performed in consideration of the weight of the article to be supplied, it is preferable to set the supply time for changing the amplitude time of the supply feeder 3 that is easy to control the weight.

On the other hand, even when the amplitude intensity is used as the supply condition to be changed, the weight of the articles supplied to the pool hopper 4 can be changed for each cycle.
Furthermore, even when both the amplitude time and the amplitude intensity of the supply feeder 3 are used in combination as the supply condition to be changed, the weight of the articles supplied to the pool hopper 4 can be changed every cycle. it can.

(4)
In the combination weighing device 1 of the present embodiment, the weight value of the article stored in the booster hopper 6 is transmitted to the control unit 90. When the received weight value is too small compared to the weight value of the articles stored in the other hoppers 5 and 6 participating in the combination weighing, the control unit 90 is arranged upstream of the booster hopper 6. Articles are additionally supplied from the weighing hopper 5 to the booster hopper 6.

As a result, it is possible to prevent a decrease in the number of combinations due to an increase in the number of booster hoppers 6 in which the weight of stored articles is too small to participate in the combination, and it is possible to always maintain a high operating rate.
[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
In the above embodiment, the combination weighing device 1 in which the heads 8 including the supply feeder 3, the pool hopper 4, the weighing hopper 5, and the booster hopper 6 are arranged substantially evenly in the circumferential direction around the dispersion table 2 is taken as an example. Explained and explained. However, the present invention is not limited to this.
For example, as shown in FIG. 5, even when the supply feeder 3, the pool hopper 4, the weighing hopper 5, and the booster hopper 6 are arranged on a straight line, the combination weighing device 70 discharges articles to the collective discharge chute 7. The same effects as described above can be obtained.

(B)
In the said embodiment, each head 8 demonstrated and demonstrated the example provided with the pool hopper 4, the measurement hopper 5, and the booster hopper 6 arrange | positioned in series in the perpendicular direction. However, the present invention does not necessarily require the pool hopper 4 to be an essential component.
For example, the configuration may be such that the pool hopper 4 is not provided and the weighing hopper 5 and the booster hopper 6 are arranged in series in the vertical direction. Even when there is no pool hopper 4, since the articles stored in the weighing hopper 5 and the booster hopper 6 can participate in the combination weighing, the same effect as described above can be obtained.

(C)
In the above embodiment, as shown in FIG. 6A, the weighing hopper 5 is disposed on the downstream side of the pool hopper 4, and the booster hopper 6 is disposed on the downstream side of the weighing hopper 5. The booster machine type combination weighing device 1 in which the combination calculation is performed using the weight value of the objects to be weighed stored in FIG. However, the present invention is not limited to this.

  For example, as shown in FIG. 6B, the present invention is applied to a pair machine type combination weighing device 71 in which a plurality of weighing hoppers 5a and 5b are arranged in parallel on the downstream side of one pool hopper 4. May be applied. Even in this case, the combination weighing is performed using the weight values of the articles stored in the plurality of weighing hoppers 5 arranged on the downstream side of the pool hopper 4. And the control part 90 controls the supply conditions of the supply feeder 3 so that the weight of the articles | goods supplied with respect to the pool hopper 4 may differ for every cycle. Thereby, the articles having different weight values can be stored in the plurality of weighing hoppers 5 to which the articles are distributed from the same pool hopper 4. Therefore, even when the present invention is applied to the pair machine type combination weighing device 71, it is possible to increase the number of combinations and improve the operation rate of the combination weighing device 71.

Note that the pair machine type combination weighing device 71 as shown in FIG. 6B may also be controlled so that the supply conditions of the articles supplied to the pool hopper 4 are different for the adjacent supply feeders 3. However, different control may be performed for all the supply feeders 3.
(D)
In the embodiment described above, an example in which the control unit 90 controls the supply conditions of each supply feeder 3 has been described so that supply conditions of articles supplied to the adjacent pool hoppers 4 do not match. However, the present invention is not limited to this.

  For example, the control unit 90 may control the supply conditions of all the supply feeders 3 so as to supply articles to all the pool hoppers 4 under different supply conditions. According to this, it can suppress more effectively that it will be in the state where the articles | goods of substantially the same weight are stored in the hoppers 5 and 6 which participate in combination measurement. Therefore, it is possible to prevent a reduction in the number of combinations used for the combination calculation and to improve the operating rate of the combination weighing device 1.

(E)
In the said embodiment, the control part 90 gave and demonstrated the example which changes the supply conditions of articles | goods alternately for every cycle. However, the present invention is not limited to this.
For example, instead of changing alternately, a method of repeatedly setting a plurality of supply conditions of three or more or a method of changing supply conditions randomly may be employed. Even in this case, it is possible to obtain the same effect as that in the above embodiment in which the number of combinations is increased and the operating rate of the combination weighing device 1 is improved.

(F)
In the said embodiment, the example in which this invention is applied with respect to all the supply feeders 3 was given and demonstrated. However, the present invention is not limited to this.
For example, even when the present invention is applied only to a part of the supply feeders 3, the number of combinations can be increased to improve the operation rate of the apparatus.

  The combination weighing device according to the present invention has an effect that the operation rate of the combination weighing device can be improved as compared with the conventional one, and thus includes a plurality of hoppers for storing the objects to be weighed for one supply feeder. It is widely applicable to the combination weighing device.

1 is a schematic diagram of a combination weighing device according to an embodiment of the present invention. The partial top view of the supply feeder with which the combination weighing | measuring apparatus of FIG. 1 is provided. The supply feeder side view with which the combination weighing device of Drawing 1 is provided. The block diagram which shows the structure of the control part with which the combination weighing | measuring apparatus of FIG. 1 is provided, and its peripheral device. The perspective view which shows the combination weighing | measuring apparatus which concerns on other embodiment of this invention. (A) is a conceptual diagram which shows the combination weighing device which concerns on one Embodiment of this invention, (b) is a conceptual diagram which shows the combination weighing device which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combination measuring device 2 Dispersing table 2a Electromagnetic vibration device 3 Supply feeder (supply part)
3a Electromagnetic vibration device 4 Pool hopper 5 Weighing hopper 5a, 5b Weighing hopper 6 Booster hopper 7 Collecting discharge chute 10 Load cell 31 Supply troughs 31a to 31d Supply trough 41 Gates 51a and 51b Gate 61 Gate 70 Combination weighing device 71 Combination weighing device 90 Control unit 91 CPU
92 ROM
93 RAM
94 HDD
95 Operation panel 95a Display screen

Claims (11)

A plurality of supply units for supplying objects to be weighed;
A plurality of hoppers that are arranged for each of the plurality of supply units on the downstream side of the plurality of supply units, and store the measured objects to be weighed;
A control unit that performs combination calculation using the weight values of the objects to be weighed stored in the plurality of hoppers, and controls the supply of the objects to be weighed to the plurality of hoppers by the supply unit;
With
The control unit controls supply conditions so that the weight of the objects to be weighed supplied from the plurality of supply units is different for each cycle.
Combination weighing device. The control unit alternately changes the supply condition for each cycle.
The combination weighing device according to claim 1. The control unit changes the amplitude time of the supply unit as the supply condition.
The combination weighing device according to claim 1 or 2. The control unit changes the amplitude intensity of the supply unit as the supply condition.
The combination weighing device according to any one of claims 1 to 3. The hopper includes a weighing hopper that receives and weighs the object to be weighed supplied from the supply unit, and a booster hopper disposed on the downstream side of the weighing hopper.
The combination weighing device according to any one of claims 1 to 4. The control unit determines whether to additionally supply the objects to be weighed from the weighing hopper to the booster hopper based on information on the weight value of the objects to be weighed stored in the booster hopper. ,
The combination weighing device according to claim 5. The control unit sets different supply conditions for the supply units adjacent to each other.
The combination weighing device according to claim 5 or 6. The control unit sets different supply conditions for each of the supply units.
The combination weighing device according to claim 5 or 6. A plurality of the hoppers are arranged on each downstream side of the pool hopper so that the objects to be weighed are distributed from each of the plurality of pool hoppers that receive the objects to be weighed supplied from the supply unit, A weighing hopper that weighs the object to be weighed.
The combination weighing device according to any one of claims 1 to 4. The control unit sets different supply conditions for the supply units adjacent to each other.
The combination weighing device according to claim 9. The control unit sets different supply conditions for each of the supply units.
The combination weighing device according to claim 9.

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