JPH07198463A - Combination weighing method and apparatus - Google Patents
Combination weighing method and apparatusInfo
- Publication number
- JPH07198463A JPH07198463A JP35016893A JP35016893A JPH07198463A JP H07198463 A JPH07198463 A JP H07198463A JP 35016893 A JP35016893 A JP 35016893A JP 35016893 A JP35016893 A JP 35016893A JP H07198463 A JPH07198463 A JP H07198463A
- Authority
- JP
- Japan
- Prior art keywords
- weighed
- weighing
- zero point
- combination
- objects
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、複数の収納室を備え
た複数の計量ホッパを用いて被計量物を組み合せて計量
する組合せ計量装置に関し、特に、その零点補正に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination weighing device for combining and weighing objects to be weighed using a plurality of weighing hoppers having a plurality of storage chambers, and more particularly to a zero point correction thereof.
【０００２】[0002]
【従来の技術】一般に、菓子や漬物などのように、個々
の重量にバラツキがある被計量物を目標重量ずつ袋詰め
する場合、複数の計量ホッパに収納された被計量物を組
合せて計量する組合せ計量装置が用いられる。この種の
計量装置のうち、各計量ホッパに複数の収納室を設ける
ことにより多くの組合せ数を得る組合せ計量装置があ
る。2. Description of the Related Art Generally, when packing objects such as confectionery and pickles that have different weights by target weight, the objects stored in a plurality of weighing hoppers are combined and weighed. A combination weighing device is used. Among the weighing devices of this type, there is a combination weighing device that obtains a large number of combinations by providing a plurality of storage chambers in each weighing hopper.
【０００３】この従来の組合せ計量装置は、各計量ホッ
パに設けられた複数の収納室に、プールホッパから選択
的に被計量物を供給して計量し、組合せ演算手段によ
り、その重量検出信号を零点補正した後、組合せ演算し
て目標値を基準とした許容範囲内にある収納室の組合せ
を選択し、開閉手段によりそれら収納室を開放して被計
量物を排出させる。In this conventional combination weighing device, the objects to be weighed are selectively supplied from a pool hopper to a plurality of storage chambers provided in each weighing hopper and weighed. After the zero point correction, a combination calculation is performed to select a combination of storage chambers within an allowable range based on the target value, and the storage chambers are opened by the opening / closing means to discharge the objects to be weighed.
【０００４】ここで、零点補正値は、組合せ計量の始動
時における空の計量ホッパ重量を計量した計量値により
初期設定される。しかし、計量動作中に、温度変化や経
時変化による計量器のドリフトや計量ホッパに付着した
被計量物のカスなどによって零点がずれ、これにより計
量誤差が生じるため、随時零点補正値の再設定を行うこ
とが必要となる。Here, the zero-point correction value is initially set by the weighing value obtained by weighing the empty weighing hopper weight at the start of the combination weighing. However, during the weighing operation, the zero point shifts due to the drift of the weighing machine due to temperature change or aging and the residue of the object to be weighed attached to the weighing hopper, which causes a weighing error.Therefore, reset the zero point correction value at any time. It is necessary to do it.
【０００５】この場合、従来では対象となる計量ホッパ
のすべての収納室が空になったときの重量検出信号を、
零点補正値として再設定している。例えば、その計量ホ
ッパの複数の収納室が同時に選択されて空になるのを待
って零点補正値の再設定を行う装置（特公平5-77247 号
公報参照）や、対象となる計量ホッパを一旦空にするた
めにその計量ホッパを優先的にまたは強制的に組合せ計
量に参加させ、排出してから零点補正を行う装置が提案
されている（特公平5-77248 号公報 ,特公平5-77249 号
公報参照）。In this case, conventionally, the weight detection signal when all the storage chambers of the target weighing hopper are emptied,
It is reset as the zero correction value. For example, a device that resets the zero correction value after waiting for multiple storage chambers of the weighing hopper to be selected and emptied at the same time (see Japanese Examined Patent Publication No. 5-77247), or the target weighing hopper once A device has been proposed in which the weighing hopper is preferentially or forcibly participated in the combination weighing in order to empty it, and the zero point is corrected after discharging (Japanese Patent Publication No. 5-77248 and Japanese Patent Publication No. 5-77249). (See the official gazette).
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、これら
装置には次のような問題点があった。上記のように、対
象となる計量ホッパのすべての収納室が同時に空になる
確率が低いので、零点調整が遅れて再設定効率が悪くな
る。他方、計量ホッパを優先的にまたは強制的に組合せ
計量に参加させて対象となる計量ホッパのすべての収納
室を空にする場合、組合せパターンが制限されることに
なり、いきおい重量の許容範囲内の組合せが成立しな
い、いわゆるエラーの発生頻度が高くなって計量作業の
効率が低下したり、許容範囲内の上限近くの組合せが多
くなって、生産の歩留りが悪くなるという問題があっ
た。However, these devices have the following problems. As described above, since it is unlikely that all the storage chambers of the target weighing hopper will be emptied at the same time, the zero adjustment will be delayed and the resetting efficiency will be poor. On the other hand, if the weighing hoppers are preferentially or forcibly joined in the combination weighing to empty all the storage chambers of the target weighing hoppers, the combination pattern will be limited, and the weight will fall within the allowable weight range. However, there is a problem in that the frequency of occurrence of so-called errors increases and the efficiency of weighing work decreases, and the number of combinations near the upper limit within the allowable range increases, resulting in a poor production yield.
【０００７】この発明は上記の問題点を解決して、零点
補正を効率良く行い、被計量物の高精度かつ高速な計量
を実現することができる組合せ計量装置を提供すること
を目的としている。An object of the present invention is to solve the above problems and to provide a combination weighing device capable of efficiently performing zero correction and realizing highly accurate and high-speed weighing of an object to be weighed.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、この発明の請求項１の組合せ計量方法は、零点設定
対象である特定の計量ホッパの１つの収納室から被計量
物が排出されたとき、プールホッパからその収納室への
被計量物の供給を禁止した上で、残った他の収納室の被
計量物の測定重量を第１計量値として取り込み、続い
て、上記特定の計量ホッパの他の収納室に被計量物が収
納されている状態で、プールホッパから上記１つの収納
室に被計量物を供給させてそのときの各収納室に収納さ
れている被計量物の合計測定重量を第２計量値として取
り込み、さらに、上記１つの収納室に被計量物が収納さ
れている状態で、組合せ選択によって上記他の収納室か
ら被計量物を排出させ、続いてプールホッパから上記他
の収納室への被計量物の供給を禁止した上で、残りの収
納室の被計量物の測定重量を第３の計量値として取り込
み、さらに、別の収納室があるときは、上記別の収納室
を上記１つの収納室として、上記取り込み動作を繰り返
して第４以降の計量値を取り込むとともに、これら第１
ないし第３および第４以降の計量値に基づいて所定の演
算を行い新たな零点補正値を設定することを特徴として
いる。In order to achieve the above object, in the combination weighing method according to claim 1 of the present invention, an object to be weighed is discharged from one storage chamber of a specific weighing hopper which is a zero point setting object. In this case, after the supply of the objects to be weighed from the pool hopper to the storage chamber is prohibited, the measured weight of the remaining objects to be weighed in the other storage chamber is taken in as the first weighing value, and then the above specific weighing is performed. With the objects to be weighed stored in the other storage chambers of the hopper, the objects to be weighed are supplied from the pool hopper to the one storage chamber, and the total of the objects to be weighed stored in each storage chamber at that time. The measured weight is taken in as the second weighing value, and while the objects to be weighed are stored in the one storage chamber, the objects to be weighed are discharged from the other storage chamber by the combination selection, and then from the pool hopper. Weighing to other storage room Is prohibited, and the measured weight of the objects to be weighed in the remaining storage chambers is taken in as the third weight value, and if there is another storage chamber, the other storage chamber is set to the one storage chamber. As a result, the above-mentioned loading operation is repeated to load the fourth and subsequent measurement values, and
It is characterized in that a predetermined calculation is performed on the basis of the measured values after the third and fourth values and a new zero correction value is set.
【０００９】請求項２の組合せ計量装置は、零点設定対
象である特定の計量ホッパの１つの収納室から被計量物
が排出されたとき、プールホッパからその収納室への被
計量物の供給を禁止した上で、残った他の収納室の被計
量物の測定重量を第１計量値として取り込み、続いて、
上記特定の計量ホッパの他の収納室に被計量物が収納さ
れている状態で、プールホッパから上記１つの収納室に
被計量物を供給させてそのときの各収納室に収納されて
いる被計量物の合計測定重量を第２計量値として取り込
み、さらに、上記１つの収納室に被計量物が収納されて
いる状態で、組合せ選択によって上記他の収納室から被
計量物を排出させ、続いてプールホッパから上記他の収
納室への被計量物の供給を禁止した上で、残りの収納室
の被計量物の測定重量を第３の計量値として取り込み、
さらに、別の収納室があるときは、上記別の収納室を上
記１つの収納室として、上記取り込み動作を繰り返して
第４以降の計量値を取り込む信号逐次取込手段と、これ
ら第１ないし第３および第４以降の計量値に基づいて所
定の演算を行い新たな零点補正値を設定する第１の零点
設定手段とを備えている。According to another aspect of the combination weighing device of the present invention, when an object to be weighed is discharged from one storage chamber of a specific weighing hopper for which the zero point is set, the object to be weighed is supplied from the pool hopper to the storage chamber. After prohibiting, take the measured weight of the remaining objects to be weighed in the other storage chamber as the first measured value, and then,
With the objects to be weighed stored in the other storage chambers of the specific weighing hopper, the objects to be weighed are supplied from the pool hopper to the one storage chamber, and the objects stored in the respective storage chambers at that time are supplied. The total measured weight of the objects to be weighed is taken in as the second weighing value, and while the objects to be weighed are stored in the one storage chamber, the objects to be weighed are discharged from the other storage chamber by the combination selection, and After prohibiting the supply of the objects to be weighed from the pool hopper to the other storage chambers, the measured weight of the objects to be weighed in the other storage chambers is taken in as the third measured value,
Further, when there is another storage chamber, the another storage chamber is used as the one storage chamber, and the signal sequential capturing means for capturing the fourth and subsequent measurement values by repeating the capturing operation and the first to the first storage chambers. A first zero point setting means for setting a new zero point correction value by performing a predetermined calculation based on the third and fourth measurement values.
【００１０】請求項３の組合せ計量方法は、請求項１に
記載の方法を実行する第１工程、上記許容範囲内の組合
せが選択されなかったとき、特定の計量ホッパのすべて
の収納室を開放して被計量物を排出させた上でその計量
ホッパの空状態の重量に基づいて新たな零点補正値を設
定する第２工程とを備え、第１工程の実行中に上記許容
範囲内の組合せが選択されなかったとき、第２工程を優
先して実行する。A combination weighing method according to a third aspect is a first step for executing the method according to the first aspect. When no combination within the allowable range is selected, all the storage chambers of a specific weighing hopper are opened. And discharging the object to be weighed and then setting a new zero-point correction value based on the empty weight of the weighing hopper, and a combination within the above-mentioned allowable range during the execution of the first step. When is not selected, the second step is preferentially executed.
【００１１】また、請求項４の組合せ計量装置は、請求
項２の組合せ計量装置において、さらに、上記許容範囲
内の組合せが選択されなかったとき、特定の計量ホッパ
のすべての収納室を開放して被計量物を排出させるエラ
ー排出用開放指令信号を上記開閉手段に出力するエラー
排出指令手段と、被計量物が排出された上記特定の計量
ホッパの空状態の重量に基づいて、新たな零点補正値を
設定する第２零点設定手段と、上記許容範囲内の組合せ
が選択されなかったとき、第１零点設定手段による新た
な零点補正値の設定よりも優先してエラー排出指令手段
および第２零点設定手段を作動させる優先作動制御手段
とを備えている。The combination weighing device according to a fourth aspect of the present invention is the combination weighing device according to the second aspect, which further opens all the storage chambers of a specific weighing hopper when a combination within the allowable range is not selected. Error discharge opening command signal for discharging the object to be weighed to output to the opening / closing means, and a new zero point based on the empty weight of the specific weighing hopper from which the object is discharged. When the combination of the second zero point setting means for setting the correction value and the allowable range is not selected, the error discharge commanding means and the second zero are given priority over the setting of the new zero point correction value by the first zero point setting means. And priority operation control means for operating the zero point setting means.
【００１２】請求項５の組合せ計量方法は、請求項４の
組合せ計量方法において、さらに、所定の零点設定要求
タイミングで特定の計量ホッパのすべての収納室を開放
して被計量物を排出させた上で、その計量ホッパの重量
に基づいて新たな零点補正値を設定する第３工程を備
え、第１工程と第２工程とが実行されなかった状態で、
上記特定の計量ホッパについて所定の零点設定要求タイ
ミングに達したとき、第３工程を第２工程に優先して実
行する。A combination weighing method according to a fifth aspect is the combination weighing method according to the fourth aspect, further, all storage chambers of a specific weighing hopper are opened at a predetermined zero point setting request timing to discharge the objects to be weighed. In the state where the third step of setting a new zero point correction value based on the weight of the weighing hopper is provided and the first step and the second step are not executed,
When the predetermined zero-point setting request timing for the specific weighing hopper is reached, the third step is executed with priority over the second step.
【００１３】また、請求項６の組合せ計量装置は、請求
項４の組合せ計量装置において、さらに、所定の零点設
定要求タイミングで特定の計量ホッパのすべての収納室
を開放して被計量物を排出させる強制排出指令手段と、
被計量物が排出された上記特定の計量ホッパの重量に基
づいて新たな零点補正値を設定する第３零点設定手段と
を備え、優先作動制御手段は、第１および第２零点設定
手段による新たな零点補正値の設定がなされずに、上記
特定の計量ホッパについて所定の零点設定要求タイミン
グに達したとき、強制排出指令手段および第３零点設定
手段を優先して作動させる。A combination weighing device according to a sixth aspect of the present invention is the combination weighing device according to the fourth aspect, further in which all storage chambers of a specific weighing hopper are opened at a predetermined zero point setting request timing to discharge an object to be weighed. Forced discharge command means to
A third zero point setting means for setting a new zero point correction value on the basis of the weight of the specific weighing hopper from which the object to be weighed is discharged, and the priority operation control means uses the first and second zero point setting means. When the predetermined zero point setting request timing for the specific weighing hopper is reached without setting the zero point correction value, the forced discharge command means and the third zero point setting means are preferentially operated.
【００１４】[0014]
【作用】請求項１または２の発明によれば、零点設定対
象である特定の計量ホッパの複数の収納室において、被
計量物が交互に供給・排出されるときに、被計量物が供
給・排出されるごとに順次該計量ホッパの重量検出信号
を計量値として取り込む。そして、これら計量値に基づ
いて所定の演算を行って零点補正値を再設定するように
している。従って、零点設定対象である特定の計量ホッ
パの各収納室をすべて空にすることなく、零点補正値の
再設定をすることができる。また、上記特定の計量ホッ
パを組合せに参加させるという制約がないので、組合せ
パターン数も制限されない。According to the invention of claim 1 or 2, when the objects to be weighed are alternately supplied and discharged in the plurality of storage chambers of the specific weighing hoppers for which the zero point is to be set, the objects to be weighed are supplied and discharged. Each time it is discharged, the weight detection signal of the weighing hopper is sequentially taken in as a weighing value. Then, a predetermined calculation is performed based on these measured values to reset the zero point correction value. Therefore, the zero-point correction value can be reset without emptying all the storage chambers of the specific weighing hopper for which the zero-point is set. Further, since there is no restriction that the above-mentioned specific weighing hopper participates in the combination, the number of combination patterns is not limited.
【００１５】また、請求項３または４の発明によれば、
目標値を基準とした許容範囲内の組合せが選択されなか
ったとき、請求項１または２の発明の「交互排出」によ
る新たな零点補正値の設定よりも優先して、零点設定対
象である特定の計量ホッパのすべての収納室を「エラー
排出」させた上で、その計量ホッパの重量に基づいて新
たな零点補正値を設定する。従って、請求項１または２
の発明の「交互排出」による零点設定が適切なタイミン
グでなされなかった場合でも、「エラー排出」によって
零点再設定が確実になされる。According to the invention of claim 3 or 4,
When a combination within the permissible range based on the target value is not selected, the zero point setting target is specified in preference to the setting of the new zero point correction value by the "alternate discharge" of the invention of claim 1 or 2. After all the storage chambers of the weighing hopper are “error discharged”, a new zero point correction value is set based on the weight of the weighing hopper. Therefore, claim 1 or 2
Even if the zero point setting by the "alternate discharge" of the invention is not performed at an appropriate timing, the zero point resetting is surely performed by the "error discharge".
【００１６】さらに、請求項５または６の発明によれ
ば、請求項１または２の発明の「交互排出」あるいは請
求項３または４の発明の「エラー排出」による新たな零
点補正値の設定がなされずに特定の計量ホッパについて
所定の零点設定要求タイミングに達したとき、零点設定
対象である特定の計量ホッパのすべての収納室を「強制
排出」させた上で、その計量ホッパの重量に基づいて新
たな零点補正値を設定する。従って、所定の零点設定タ
イミングにおける「強制排出」によって零点再設定が確
実になされる。Further, according to the invention of claim 5 or 6, a new zero point correction value can be set by the "alternate discharge" of the invention of claim 1 or 2 or the "error discharge" of the invention of claim 3 or 4. If the specified zero point setting request timing is reached for the specific weighing hopper without doing so, all the storage chambers of the specific weighing hopper for which the zero point is set are "forced to be discharged", and then based on the weight of the weighing hopper. To set a new zero point correction value. Therefore, the zero point resetting is surely performed by the "forced discharge" at the predetermined zero point setting timing.
【００１７】[0017]
【実施例】以下、この発明の実施例を図面に基づいて説
明する。図１は、この発明の一実施例による組合せ計量
装置の機構部の概略側面図を示す。供給コンベヤ（図示
せず）から送られた被計量物は、供給シュート２を介し
て分散フィーダ４の中央に集められる。そして、分散フ
ィーダ４の振動により放射フィーダ６（６1 〜６N ）に
分散供給される。次に、被計量物は、放射フィーダ６の
振動により、プールホッパ８（８1 〜８N ）へ送られて
計量動作に合わせて一時的にプールされた後、排出ゲー
ト１６（１６1 〜１６N ）および１８（１８1 〜１
８N ）が開放されて、計量ホッパ１０（１０1 〜１
０N ）のそれぞれ複数（この例では２つ）の収納室２０
（２０1 〜２０N ）および２２（２２1 〜２２N ）に投
入される。重量検出器１２（１２1 〜１２N ）は、各収
納室２０および２２に投入された被計量物の重量を測定
してアナログ重量検出信号を出力する。重量が測定され
た被計量物は、排出ゲート２４（２４1 〜２４N ）およ
び２６（２６1 〜２６N ）が開放されて、集合シュート
１４に集合され、排出シュート４８に排出される。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of a mechanical portion of a combination weighing device according to an embodiment of the present invention. The objects to be weighed sent from a supply conveyor (not shown) are collected in the center of the dispersion feeder 4 via the supply chute 2. Then, the vibration of the dispersion feeder 4 causes the radiation feeder 6 (6 1 to 6 N ) to be distributed and supplied. Then, the objects to be weighed is by vibration of the radiation feeder 6, after being temporarily pooled in accordance with the measurement operation is sent to the pool hoppers 8 (8 1 ~8 N), the discharge gate 16 (16 1 to 16 N ) and 18 (181 to 1 )
8 N ) is opened, and the weighing hopper 10 (10 1 to 1)
0 N ), a plurality of storage chambers 20 (two in this example)
It is turned on (20 1 ~20 N) and 22 (22 1 ~22 N). The weight detector 12 (12 1 to 12 N ) measures the weight of the object to be weighed put into each of the storage chambers 20 and 22 and outputs an analog weight detection signal. The objects to be weighed which weight was measured, the discharge gate 24 (24 1 ~24 N) and 26 (26 1 ~26 N) is opened, is set in the collecting chute 14, it is discharged to the discharge chute 48.
【００１８】図２に、この組合せ計量装置の制御部のブ
ロック図を示す。重量検出器１２から出力される計量ホ
ッパ１０の各収納室２０，２２のアナログ重量検出信号
は、増幅器５０で増幅されＡ／Ｄ変換器５２でディジタ
ル重量検出信号に変換されて信号逐次取込手段３４およ
び組合せ演算手段（ＣＰＵ）３６に与えられる。FIG. 2 shows a block diagram of the control unit of this combination weighing device. An analog weight detection signal of each of the storage chambers 20 and 22 of the weighing hopper 10 output from the weight detector 12 is amplified by an amplifier 50, converted into a digital weight detection signal by an A / D converter 52, and a signal sequential acquisition means. 34 and combination calculation means (CPU) 36.
【００１９】組合せ演算手段３６は、計量ホッパ１０に
ついて零点補正するとともに、目標値を基準とした許容
範囲内となる収納室２０，２２の組合せを選択して、開
放指令信号Ｓ１を第２ゲート駆動手段６０に出力し、選
択された収納室の排出ゲート２４，２６を開放させ、被
計量物を集合シュート１４を経て排出シュート４８に排
出させる。なお、上記第２ゲート駆動手段６０および排
出ゲート２４，２６が計量ホッパ１０の開閉手段を構成
する。The combination calculation means 36 corrects the zero point of the weighing hopper 10 and selects a combination of the storage chambers 20 and 22 within an allowable range based on the target value to drive the opening command signal S1 to the second gate. It outputs to the means 60, the discharge gates 24 and 26 of the selected storage chamber are opened, and the objects to be weighed are discharged to the discharge chute 48 via the collecting chute 14. The second gate driving means 60 and the discharge gates 24 and 26 constitute the opening / closing means of the weighing hopper 10.
【００２０】ここで、上記計量ホッパ１０について初期
零点設定手段５４により初期設定された零点補正値ＷE0
は、計量動作中の温度変化や経時変化による増幅器５０
のドリフトによって、また、被計量物の種類（例えば、
漬物など）によっては計量ホッパ１０に付着した被計量
物のカスなどによって変動するため、所定のタイミング
で再設定する必要がある。Here, the zero-point correction value WE0 initially set by the initial zero-point setting means 54 for the weighing hopper 10.
Is an amplifier 50 due to a temperature change or a time change during the weighing operation.
Due to the drift of the
Depending on the amount of pickles, etc., the amount of the objects to be weighed attached to the weighing hopper 10 may change, so it is necessary to reset at a predetermined timing.
【００２１】このため、本装置は、組合せパターンが制
限されないように、零点設定対象の計量ホッパをすべて
空にすることなく、第１零点設定手段３８により、零点
エラーの変動を考慮して新たな零点補正値を設定して計
量誤差を防止するものである。以下、零点補正値設定の
動作を、図３の模式図を用いて計量ホッパ１０1 を例に
して説明する。For this reason, in the present apparatus, the first zero point setting means 38 takes into account the variation of the zero point error so as not to limit the combination pattern, and to make a new setting without emptying all the weighing hoppers for which the zero points are set. A zero point correction value is set to prevent a measurement error. Hereinafter, the operation of setting the zero point correction value will be described with reference to the schematic diagram of FIG. 3 by taking the weighing hopper 10 1 as an example.
【００２２】いま、ＷE を零点エラー（零点のずれ），
Ｗa を収納室２０1 に最初に投入された被計量物Ｍa の
重量，Ｗb を収納室２２1 に最初に投入された被計量物
Ｍbの重量，Ｗh を収納室２０1 に被計量物Ｍa が排出
された後に投入された被計量物Ｍh の重量とする。零点
設定要求発生手段５６は、各計量ホッパについて所定の
タイミング例えば時間，組合せに参加した回数を計測し
て所定数値に達したとき零点設定対象となる計量ホッパ
を特定する。この状態で、図３（Ａ）において、被計量
物Ｍa,Ｍb が収納された特定の計量ホッパ１０1 の重量
Ｗ0 が計量部１２1 により計測される。このときの零点
エラーは、すでに初期零点設定手段５４で設定された初
期値ＷE0からずれており、これをＷE1（図示１２１）と
すると、重量Ｗ0 は、Ｗ0 ＝Ｗa ＋Ｗb ＋ＷE1であらわ
される。Now, WE is a zero point error (zero point deviation),
Wa is the weight of the object to be weighed Ma initially loaded into the storage chamber 20 1 , Wb is the weight of the object to be weighed Mb initially loaded into the storage chamber 22 1 , and Wh is the weight of the object to be weighed Ma in the storage chamber 20 1. It is the weight of the object Mh to be weighed after being discharged. The zero point setting request generation means 56 measures the predetermined timing, for example, the time, the number of times of participation in the combination for each weighing hopper, and specifies the weighing hopper to be the zero point setting target when the predetermined number is reached. In this state, in FIG. 3A, the weight W0 of the specific weighing hopper 10 1 accommodating the objects Ma and Mb to be weighed is measured by the weighing unit 12 1 . The zero point error at this time has already deviated from the initial value WE0 set by the initial zero point setting means 54, and if this is WE1 (121 in the figure), the weight W0 is expressed as W0 = Wa + Wb + WE1.
【００２３】次に、図３（Ｂ）において、収納室２０1
の被計量物Ｍa が組合せ計量に用いられて排出されたと
する。このとき、零点設定要求発生手段５６により第１
ゲート駆動手段５８の駆動を禁止して、プールホッパ８
1 の排出ゲート１６1 ，１８1 を閉じて、計量ホッパ１
０1 に対する供給を停止させておく。この状態におい
て、計量ホッパ１０1 の第１計量値である重量Ｗ1 は次
式であらわされる。 Ｗ1 ＝Ｗb ＋ＷE1 （１）Next, referring to FIG. 3B, the storage chamber 20 1
It is assumed that the object Ma to be measured is used for combined weighing and discharged. At this time, the zero point setting request generation means 56
The pool hopper 8 is prohibited by prohibiting the driving of the gate driving means 58.
1 of the discharge gate 16 1, 18 1 are closed, the weighing hoppers 1
The supply for 0 1 is stopped. In this state, the weight W1 which is the first measured value of the weighing hopper 10 1 is represented by the following equation. W1 = Wb + WE1 (1)
【００２４】次に、図３（Ｃ）において、収納室２０1
に被計量物Ｍh を投入し、計量ホッパ１０1 の第２計量
値である重量Ｗ2 を計測する。 Ｗ2 ＝Ｗb ＋ＷE1 ＋Ｗh （２） この（１），（２）式により、次式のように、ＷE1を含
まないＷh を求めることができる。 Ｗh ＝Ｗ2 ーＷ1 （３）Next, referring to FIG. 3C, the storage chamber 20 1
The object Mh to be weighed is put into the container and the weight W2 which is the second measured value of the weighing hopper 10 1 is measured. W2 = Wb + WE1 + Wh (2) From these equations (1) and (2), WH that does not include WE1 can be obtained as in the following equation. Wh = W2-W1 (3)
【００２５】次に、図３（Ｄ）において、被計量物Ｍh
が収納室２０1 に収納され続けている状態で、被計量物
Ｍb が選択されて排出されると、計量ホッパ１０1 の第
３計量値である重量Ｗ3 が計測される。 Ｗ3 ＝Ｗh ＋ＷE1 （４） （４）式に（３）式を代入すると、零点エラーＷE1は、
次式のように求められる。 ＷE1＝Ｗ3 −Ｗh ＝Ｗ3 −（Ｗ2 ーＷ1 ） こうして得られた零点エラーＷE1が、第１零点設定手段
３８により、新たな零点補正値として設定される。な
お、図３（Ｄ）において、被計量物Ｍb が選択されず
に、被計量物Ｍh が選択された場合には、図３（Ｂ）に
戻り、図３（Ｃ），（Ｄ）の状態が発生するのを待つ。Next, referring to FIG. 3D, the object to be weighed Mh is measured.
When the object to be weighed Mb is selected and discharged while the object is continuously stored in the storage chamber 20 1 , the weight W3 as the third measured value of the weighing hopper 10 1 is measured. W3 = Wh + WE1 (4) Substituting equation (3) into equation (4), the zero point error WE1 becomes
It is calculated by the following formula. WE1 = W3−Wh = W3− (W2−W1) The zero point error WE1 thus obtained is set as a new zero point correction value by the first zero point setting means 38. In addition, in FIG. 3D, when the object Mb is not selected but the object Mh is selected, the process returns to FIG. 3B and the states of FIGS. Wait for to occur.
【００２６】こうして、本装置は、零点設定対象の計量
ホッパの２つの収納室を同時に空にすることなく、各収
納室の被計量物を「交互に排出」することにより、零点
補正値を演算して零点設定を行う（交互排出による零点
設定）。In this way, the present apparatus calculates the zero-point correction value by "alternately discharging" the objects to be weighed in each storage chamber without emptying the two storage chambers of the weighing hopper for which the zero point is to be set at the same time. And set the zero point (zero point setting by alternate discharge).
【００２７】次に、図４に、計量ホッパ１０の収納室が
３室タイプの場合を示す。この場合、第３の収納室を第
１の収納室として取り扱って図３で示した信号取込動作
を繰り返して、零点設定を行う。すなわち、ＷE を零点
エラー，Ｗa を収納室７２1に最初に投入された被計量
物Ｍa の重量，Ｗb を同じく収納室７４1 の被計量物Ｍ
b の重量，Ｗc を同じく収納室７６1 の被計量物Ｍc の
重量，Ｗk を収納室７２1 に被計量物Ｍa が排出された
後に投入された被計量物Ｍk の重量とする。また、Ｗm
を収納室７４1 に被計量物Ｍb が排出された後に投入さ
れた被計量物Ｍm の重量とする。Next, FIG. 4 shows a case where the storage chamber of the weighing hopper 10 is of a three-chamber type. In this case, the third storage chamber is treated as the first storage chamber and the signal acquisition operation shown in FIG. 3 is repeated to set the zero point. That is, WE is a zero point error, Wa is the weight of the object to be weighed Ma initially loaded into the storage chamber 72 1 , and Wb is the object to be weighed M in the storage chamber 74 1.
Let bc be the weight of the object Mc to be weighed in the storage chamber 76 1 and Wk be the weight of the object Mk to be weighed after the object Ma has been discharged into the storage chamber 72 1 . Also, Wm
Is the weight of the object Mm to be weighed after the object Mb has been discharged into the storage chamber 74 1 .
【００２８】図４（Ａ）において、被計量物Ｍa,Ｍb,Ｍ
c が収納された計量ホッパ１０1 の重量Ｗ0 は、このと
きの零点エラーＷE1（図示１２３）を含んで計測され
る。Ｗ0 ＝Ｗa ＋Ｗb ＋Ｗc ＋ＷE1In FIG. 4A, the objects to be weighed Ma, Mb, M
The weight W0 of the weighing hopper 10 1 accommodating c is measured including the zero point error WE1 (123 in the figure) at this time. W0 = Wa + Wb + Wc + WE1
【００２９】次に、図４（Ｂ）において、収納室７２1
の被計量物Ｍa が組合せ計量で選択されて排出されたと
する。このときの計量ホッパ１０1 の第１計量値である
重量Ｗ1 は、零点エラーＷE1の状態で計測され、次式で
あらわされる。 Ｗ1 ＝Ｗb ＋Ｗc ＋ＷE1 （５） このとき、この計量ホッパ１０1 に対するプールホッパ
８1 からの供給を同様に停止させておく。次に、図４
（Ｃ）において、収納室７２1 に被計量物Ｍk を投入
し、計量ホッパ１０1 の第２計量値である重量Ｗ2 を計
測する。 Ｗ2 ＝Ｗk ＋Ｗb ＋Ｗc ＋ＷE1 （６） この（５）、（６）式により、ＷE3を含まないＷh を求
めることができる。 Ｗk ＝Ｗ2 ーＷ1 （７）Next, referring to FIG. 4B, the storage chamber 72 1
It is assumed that the object Ma to be measured is selected and discharged by combination weighing. The weight W1 which is the first weighing value of the weighing hopper 10 1 at this time is measured in the state of the zero point error WE1 and is represented by the following equation. W1 = Wb + Wc + WE1 (5) At this time, the supply from the pool hopper 8 1 to the weighing hopper 10 1 is similarly stopped. Next, FIG.
In (C), the object Mk to be weighed is put into the storage chamber 72 1 , and the weight W2 which is the second weighing value of the weighing hopper 10 1 is measured. W2 = Wk + Wb + Wc + WE1 (6) From these equations (5) and (6), WH without WE3 can be obtained. Wk = W2-W1 (7)
【００３０】次に、図４（Ｄ）において、被計量物Ｍb
が選択されて排出されると、計量ホッパ１０1 の第３計
量値である重量Ｗ3 が計測される。 Ｗ3 ＝Ｗk ＋Ｗc ＋ＷE1 （８） このとき、この計量ホッパ１０1 に対するプールホッパ
８1 からの供給を同様に停止させておく。次に、図４
（Ｅ）において、収納室７４1 に被計量物Ｍm を投入
し、計量ホッパ１０1 の第４計量値である重量Ｗ4 を計
測する。 Ｗ4 ＝Ｗk ＋Ｗm ＋Ｗc ＋ＷE1 （９） この（８）、（９）式により、ＷE1を含まないＷm を求
めることができる。 Ｗm ＝Ｗ4 ーＷ3 （１０）Next, in FIG. 4D, the object to be weighed Mb is
Is selected and discharged, the weight W3 which is the third measured value of the weighing hopper 10 1 is measured. W3 = Wk + Wc + WE1 (8) At this time, the supply from the pool hopper 8 1 to the weighing hopper 10 1 is similarly stopped. Next, FIG.
In (E), the object Mm to be weighed is put into the storage chamber 74 1 and the weight W4 as the fourth measured value of the weighing hopper 10 1 is measured. W4 = Wk + Wm + Wc + WE1 (9) From these equations (8) and (9), Wm that does not include WE1 can be obtained. Wm = W4 -W3 (10)
【００３１】次に、図４（Ｆ）において、被計量物Ｍc
が選択されて排出されると、計量ホッパ１０1 の重量Ｗ
5 が計測される。 Ｗ5 ＝Ｗk ＋Ｗm ＋ＷE1 （１１） （７），（１０）式を（１１）式に代入すると、零点設
定値ＷE3は、次式のようにあらわされる。 ＷE1＝Ｗ5 −Ｗk −Ｗm ＝Ｗ5 −（Ｗ2 ーＷ1 ）−（Ｗ4 ーＷ3 ） 第１零点設定手段３８は、この零点エラーＷE1を新たな
零点補正値として設定する（交互排出による零点設
定）。Next, referring to FIG. 4 (F), the object Mc to be weighed is
Is selected and discharged, the weight W of the weighing hopper 10 1
5 is measured. W5 = Wk + Wm + WE1 (11) When the equations (7) and (10) are substituted into the equation (11), the zero-point set value WE3 is expressed as the following equation. WE1 = W5-Wk-Wm = W5- (W2-W1)-(W4-W3) The first zero point setting means 38 sets this zero point error WE1 as a new zero point correction value (zero point setting by alternate discharge).
【００３２】次に、図５に、この発明の他の実施例によ
る組合せ計量装置の制御部の構成を示す。この制御部
は、図２に加えて、さらに、第２零点設定手段６２，第
３零点設定手段６４，優先作動制御手段６６，エラー排
出指令手段６８，強制排出指令手段７０を備えている。Next, FIG. 5 shows the configuration of the control unit of the combination weighing device according to another embodiment of the present invention. In addition to FIG. 2, this control unit further includes a second zero point setting means 62, a third zero point setting means 64, a priority operation control means 66, an error discharge command means 68, and a forced discharge command means 70.
【００３３】この装置において、組合せ演算手段（ＣＰ
Ｕ）３６は、各計量ホッパについて組合せに参加した回
数をカウントするカウンタを内蔵しており、いずれかの
計量ホッパのカウント値が、零点再設定が必要とされる
所定の第１カウント値に達したとき、その計量ホッパを
特定の計量ホッパと認識して、図２の「交互排出」体制
に入る。この状態において、上記目標重量の許容範囲内
で収納室の組合せが選択されなかったとき、すなわちエ
ラーが発生したとき、組合せ演算手段（ＣＰＵ）３６か
らエラー選択信号Ｃ２が優先作動制御手段６６に与えら
れる。優先作動制御手段６６は、エラー選択信号Ｃ２に
よって、上記「交互排出」体制における組合せ選択信号
Ｃ１の出力よりも優先して、エラー排出指令手段６８を
作動させる。エラー排出指令手段６８は、エラー排出用
開放指令信号Ｓ２を第２ゲート駆動手段６０に出力し
て、零点設定対象である上記特定の計量ホッパ１０のす
べての収納室２０，２２を開放して被計量物を排出させ
る。このとき、組合せ演算は行われない。そして、第２
零点設定手段４４により、被計量物が排出された計量ホ
ッパ１０の重量を示す重量検出信号に基づいて、新たな
零点補正値を設定する（エラー排出による零点設定）。In this device, the combination calculation means (CP
U) 36 has a built-in counter that counts the number of times each weighing hopper has participated in the combination, and the count value of one of the weighing hoppers reaches the predetermined first count value that requires zero resetting. Then, the weighing hopper is recognized as a specific weighing hopper, and the "alternate discharge" system of FIG. 2 is entered. In this state, when the combination of the storage chambers is not selected within the allowable range of the target weight, that is, when an error occurs, the combination calculation means (CPU) 36 gives the error selection signal C2 to the priority operation control means 66. To be In response to the error selection signal C2, the priority operation control means 66 operates the error ejection command means 68 in preference to the output of the combination selection signal C1 in the "alternate ejection" system. The error discharge command means 68 outputs an error discharge opening command signal S2 to the second gate drive means 60 to open all the storage chambers 20 and 22 of the specific weighing hopper 10, which is the zero point setting target, and to close the storage chambers. Discharge the sample. At this time, the combination calculation is not performed. And the second
The zero point setting means 44 sets a new zero point correction value based on the weight detection signal indicating the weight of the weighing hopper 10 from which the object to be weighed has been discharged (zero point setting due to error discharge).
【００３４】さらに、第１および第２零点設定手段３
８，６２による新たな零点補正値の設定がなされず、上
記カウンタが上記第１カウント値を越えた第２カウント
値になって、これ以上零点設定が遅れると好ましくない
とき、組合せ演算手段（ＣＰＵ）３６から強制選択信号
Ｃ３が優先作動制御手段６６に与えられる。優先作動制
御手段６６は、強制選択信号Ｃ３によって、組合せ選択
信号Ｃ１およびエラー選択信号Ｃ２よりも優先して、強
制排出指令手段７０を作動させる。強制排出指令手段７
０は、強制排出用開放指令信号Ｓ３を第２ゲート駆動手
段６０に出力して、上記特定の計量ホッパ１０のすべて
の収納室２０，２２を開放して被計量物を排出させる。
このとき、同様に組合せ演算は行われない。そして、第
３零点設定手段６４により、被計量物が排出された計量
ホッパ１０の重量を示す重量検出信号に基づいて、新た
な零点補正値を設定する（強制排出による零点設定）。Further, the first and second zero point setting means 3
When a new zero point correction value is not set by 8, 62 and the counter becomes the second count value exceeding the first count value, and it is not preferable that the zero point is further delayed, the combination calculation means (CPU) ) 36, the forced selection signal C3 is given to the priority operation control means 66. The priority operation control means 66 activates the forced ejection command means 70 by the forced selection signal C3 in preference to the combination selection signal C1 and the error selection signal C2. Forced discharge command means 7
0 outputs the forced discharge opening command signal S3 to the second gate driving means 60 to open all the storage chambers 20 and 22 of the specific weighing hopper 10 and discharge the objects to be weighed.
At this time, similarly, the combination calculation is not performed. Then, the third zero point setting means 64 sets a new zero point correction value based on the weight detection signal indicating the weight of the weighing hopper 10 from which the object to be weighed is discharged (zero point setting by forced discharge).
【００３５】こうして、この装置は、「交互排出」によ
る零点設定が適切なタイミングでなされなかった場合で
も、「エラー排出」さらに「強制排出」によって零点再
設定を確実に実行することができる。In this way, this apparatus can surely execute the zero point reset by the "error discharge" and the "forced discharge" even when the zero point setting by the "alternate discharge" is not performed at an appropriate timing.
【００３６】なお、「交互排出」と「エラー排出」のみ
をこの優先順序で行い、「強制排出」を行わないように
してもよい。It should be noted that only "alternate discharge" and "error discharge" may be performed in this priority order and "forced discharge" may not be performed.
【００３７】なお、エラ−排出または強制排出された被
計量物は、図１において、振分けゲート５０の切換えに
より不良排出シュート５２から不良排出される。通常は
不良排出シュート５２は閉じられており、被計量物は包
装機排出シュート５４の方へ排出される。Note that the objects to be weighed that have been subjected to error discharge or forced discharge are defectively discharged from the defective discharge chute 52 by switching the sorting gate 50 in FIG. Normally, the defective discharge chute 52 is closed, and the objects to be weighed are discharged toward the packing machine discharge chute 54.
【００３８】[0038]
【発明の効果】以上のように、 請求項１または２の発
明によれば、零点設定対象である特定の計量ホッパの複
数の収納室において、被計量物が交互に供給・排出され
るときに、被計量物が供給・排出されるごとに順次該計
量ホッパの重量検出信号を計量値として取り込む。そし
て、これら計量値に基づいて所定の演算を行って零点補
正値を再設定するようにしている。従って、零点設定対
象である特定の計量ホッパの各収納室をすべて空にする
ことなく、零点補正値の再設定をすることができる。ま
た、上記特定の計量ホッパを組合せに参加させるという
制約がないので、組合せパターン数も制限されない。As described above, according to the invention of claim 1 or 2, when the objects to be weighed are alternately supplied and discharged in the plurality of storage chambers of the specific weighing hopper which is the zero point setting object. , The weight detection signal of the weighing hopper is sequentially fetched as a weighing value every time the object to be weighed is supplied or discharged. Then, a predetermined calculation is performed based on these measured values to reset the zero point correction value. Therefore, the zero-point correction value can be reset without emptying all the storage chambers of the specific weighing hopper for which the zero-point is set. Further, since there is no restriction that the above-mentioned specific weighing hopper participates in the combination, the number of combination patterns is not limited.
【００３９】また、請求項３または４の発明によれば、
目標値を基準とした許容範囲内の組合せが選択されなか
ったとき、請求項１または２の発明の「交互排出」によ
る新たな零点補正値の設定よりも優先して、零点設定対
象である特定の計量ホッパのすべての収納室を「エラー
排出」させた上で、その計量ホッパの重量に基づいて新
たな零点補正値を設定する。従って、請求項１または２
の発明の「交互排出」による零点設定が適切なタイミン
グでなされなかった場合でも、「エラー排出」によって
零点再設定が確実になされる。According to the invention of claim 3 or 4,
When a combination within the permissible range based on the target value is not selected, the zero point setting target is specified in preference to the setting of the new zero point correction value by the "alternate discharge" of the invention of claim 1 or 2. After all the storage chambers of the weighing hopper are “error discharged”, a new zero point correction value is set based on the weight of the weighing hopper. Therefore, claim 1 or 2
Even if the zero point setting by the "alternate discharge" of the invention is not performed at an appropriate timing, the zero point resetting is surely performed by the "error discharge".
【００４０】さらに、請求項５または６の発明によれ
ば、請求項１または２の発明の「交互排出」あるいは請
求項３または４の発明の「エラー排出」による新たな零
点補正値の設定がなされずに、特定の計量ホッパについ
て所定の零点設定要求タイミングに達したとき、零点設
定対象である特定の計量ホッパのすべての収納室を「強
制排出」させた上で、その計量ホッパの重量に基づいて
新たな零点補正値を設定する。従って、所定の零点設定
タイミングにおける「強制排出」によって零点再設定が
確実になされる。Further, according to the invention of claim 5 or 6, a new zero point correction value can be set by the "alternate discharge" of the invention of claim 1 or 2 or the "error discharge" of the invention of claim 3 or 4. If the specified zero point setting request timing is reached for the specific weighing hopper without doing so, all the storage chambers of the specific weighing hopper for which the zero point is set are "forced to be discharged" and then the weight of the weighing hopper is changed. Based on this, a new zero correction value is set. Therefore, the zero point resetting is surely performed by the "forced discharge" at the predetermined zero point setting timing.
【図１】この発明の一実施例に係る組合せ計量装置の概
略側面図を示す図である。FIG. 1 is a diagram showing a schematic side view of a combination weighing device according to an embodiment of the present invention.
【図２】上記の組合せ計量装置の制御部の構成を示す図
である。FIG. 2 is a diagram showing a configuration of a control unit of the combination weighing device.
【図３】零点補正値を設定する状態を示す模式図であ
る。FIG. 3 is a schematic diagram showing a state in which a zero correction value is set.
【図４】零点補正値を設定する状態を示す模式図であ
る。FIG. 4 is a schematic diagram showing a state in which a zero correction value is set.
【図５】この発明の他の実施例による組合せ計量装置の
制御部の構成を示す図である。FIG. 5 is a diagram showing a configuration of a control unit of a combination weighing device according to another embodiment of the present invention.
８1 〜８N …プールホッパ、１０1 〜１０N …計量ホッ
パ、１２1 〜１２N …重量検出器、１６1 〜１６N ，１
８1 〜１８N ，２４1 〜２４N ，２６1 〜２６N …排出
ゲート、３４…信号逐次取込手段、３６…組合せ演算手
段（ＣＰＵ）、３８…第１零点設定手段、５４…初期零
点設定手段、５６…零点設定要求発生手段、５８…第１
ゲート駆動手段、６０…第２ゲート駆動手段。8 1 to 8 N ... pool hoppers, 10 1 ~10 N ... weighing hoppers, 12 1 ~12 N ... weight detector, 16 1 ~16 N, 1
8 1 to 18 N , 24 1 to 24 N , 26 1 to 26 N ... Ejection gate, 34 ... Signal sequential acquisition means, 36 ... Combination calculation means (CPU), 38 ... First zero point setting means, 54 ... Initial zero point Setting means, 56 ... Zero setting request generating means, 58 ... First
Gate driving means, 60 ... Second gate driving means.
Claims (6)
に選択的に被計量物を供給して計量し、得られた各収納
室ごとの重量を組合せ演算して目標値を基準とした許容
範囲内にある収納室の組合せを選択し、それら収納室を
開放して被計量物を排出させる組合せ計量方法におい
て、 零点設定対象である特定の計量ホッパの１つの収納室か
ら被計量物が排出されたとき、プールホッパからその収
納室への被計量物の供給を禁止した上で、残った他の収
納室の被計量物の測定重量を第１計量値として取り込
み、続いて、上記特定の計量ホッパの他の収納室に被計
量物が収納されている状態で、プールホッパから上記１
つの収納室に被計量物を供給させてそのときの各収納室
に収納されている被計量物の合計測定重量を第２計量値
として取り込み、 さらに、上記１つの収納室に被計量物が収納されている
状態で、組合せ選択によって上記他の収納室から被計量
物を排出させ、続いてプールホッパから上記他の収納室
への被計量物の供給を禁止した上で、残りの収納室の被
計量物の測定重量を第３の計量値として取り込み、 さらに、別の収納室があるときは、上記別の収納室を上
記１つの収納室として、上記取り込み動作を繰り返して
第４以降の計量値を取り込むとともに、 これら第１ないし第３および第４以降の計量値に基づい
て所定の演算を行い新たな零点補正値を設定することを
特徴とする組合せ計量方法。1. An object to be weighed is selectively supplied to and weighed in a plurality of storage chambers provided in each weighing hopper, and the obtained weights of the respective storage chambers are combined and calculated to use a target value as a reference. In the combination weighing method that selects a combination of storage chambers within the allowable range and opens those storage chambers and discharges the objects to be weighed, the objects to be weighed from one storage chamber of the specific weighing hopper for which the zero point is set. When discharged, the supply of the objects to be weighed from the pool hopper to the storage chamber is prohibited, and the measured weights of the objects to be weighed in the other storage chambers are taken in as the first measured value. When the object to be weighed is stored in the other storage chamber of the weighing hopper,
The objects to be weighed are supplied to one of the storage chambers, the total measured weight of the objects to be weighed stored in each of the storage chambers at that time is taken in as a second weighing value, and the objects to be weighed are stored in the one storage chamber. In this state, the objects to be weighed are discharged from the other storage chambers by the combination selection, and then the supply of the objects to be weighed from the pool hopper to the other storage chambers is prohibited, and then the remaining storage chambers are If the measured weight of the object to be weighed is taken in as a third weighing value, and if there is another storage room, the above-mentioned other storage room is used as the above one storage room, and the above-mentioned loading operation is repeated to measure the fourth and subsequent weighings. A combination weighing method characterized by taking in values and performing a predetermined calculation based on these first to third and fourth weighing values to set a new zero correction value.
号を出力する重量検出器と、 上記計量ホッパの複数の収納室に選択的に被計量物を供
給するプールホッパと、 上記重量検出信号を組合せ演算して目標値を基準とした
許容範囲内にある収納室の組合せを選択し、選択された
計量ホッパの開放指令信号を出力する組合せ演算手段
と、 開放指令信号に基づいて計量ホッパの収納室を開放して
被計量物を排出させる開閉手段とを備えた組合せ計量装
置において、 零点設定対象である特定の計量ホッパの１つの収納室か
ら被計量物が排出されたとき、プールホッパからその収
納室への被計量物の供給を禁止した上で、残った他の収
納室の被計量物の測定重量を第１計量値として取り込
み、続いて、上記特定の計量ホッパの他の収納室に被計
量物が収納されている状態で、プールホッパから上記１
つの収納室に被計量物を供給させてそのときの各収納室
に収納されている被計量物の合計測定重量を第２計量値
として取り込み、 さらに、上記１つの収納室に被計量物が収納されている
状態で、組合せ選択によって上記他の収納室から被計量
物を排出させ、続いてプールホッパから上記他の収納室
への被計量物の供給を禁止した上で、残りの収納室の被
計量物の測定重量を第３の計量値として取り込み、 さらに、別の収納室があるときは、上記別の収納室を上
記１つの収納室として、上記取り込み動作を繰り返して
第４以降の計量値を取り込む信号逐次取込手段と、 これら第１ないし第３および第４以降の計量値に基づい
て所定の演算を行い新たな零点補正値を設定する第１の
零点設定手段とを備えたことを特徴とする組合せ計量装
置。2. A weighing hopper having a plurality of storage chambers, a weight detector for weighing an object stored in the storage chamber and outputting a weight detection signal, and a plurality of storage chambers of the weighing hopper. A combination of the pool hopper that selectively supplies the objects to be weighed and the weight detection signal is calculated to select the combination of the storage chambers within the allowable range based on the target value, and the opening command signal for the selected weighing hopper is selected. In a combination weighing device equipped with a combination calculation means for outputting, and an opening / closing means for opening the storage chamber of the weighing hopper based on the opening command signal to discharge the object to be weighed, When the object to be weighed is discharged from one storage room, the supply of the object to be weighed from the pool hopper to the storage room is prohibited, and the measured weight of the remaining objects to be weighed in the other storage room is first measured. Take as value and continue Te, with the other objects to be weighed to the accommodating chamber of the specific weighing hoppers is housed, the one from the pool hoppers
The objects to be weighed are supplied to one of the storage chambers, the total measured weight of the objects to be weighed stored in each of the storage chambers at that time is taken in as a second weighing value, and the objects to be weighed are stored in the one storage chamber. In this state, the objects to be weighed are discharged from the other storage chambers by the combination selection, and then the supply of the objects to be weighed from the pool hopper to the other storage chambers is prohibited, and then the remaining storage chambers are If the measured weight of the object to be weighed is taken in as a third weighing value, and if there is another storage room, the above-mentioned other storage room is used as the above one storage room, and the above-mentioned loading operation is repeated to measure the fourth and subsequent weighings. A signal sequential fetching means for fetching a value and a first zero point setting means for setting a new zero point correction value by performing a predetermined calculation on the basis of these first to third and fourth measured values are provided. Combination weighing device characterized by.
程と、 上記許容範囲内の組合せが選択されなかったとき、特定
の計量ホッパのすべての収納室を開放して被計量物を排
出させた上でその計量ホッパの空状態の重量に基づいて
新たな零点補正値を設定する第２工程とを備え、 第１工程の実行中に上記許容範囲内の組合せが選択され
なかったとき、第２工程を優先して実行する組合せ計量
方法。3. The first step of executing the method according to claim 1, and when a combination within the allowable range is not selected, all the storage chambers of a specific weighing hopper are opened to load the objects to be weighed. A second step of setting a new zero correction value based on the empty weight of the weighing hopper after discharging, and when a combination within the allowable range is not selected during execution of the first step , A combination weighing method which preferentially executes the second step.
らに、 上記許容範囲内の組合せが選択されなかったとき、特定
の計量ホッパのすべての収納室を開放して被計量物を排
出させるエラー排出用開放指令信号を上記開閉手段に出
力するエラー排出指令手段と、 被計量物が排出された上記特定の計量ホッパの空状態の
重量に基づいて、新たな零点補正値を設定する第２零点
設定手段と、 上記許容範囲内の組合せが選択されなかったとき、第１
零点設定手段による新たな零点補正値の設定よりも優先
してエラー排出指令手段および第２零点設定手段を作動
させる優先作動制御手段とを備えた組合せ計量装置。4. The combination weighing device according to claim 2, further, when a combination within the allowable range is not selected, all storage chambers of a specific weighing hopper are opened to discharge an object to be weighed. Second zero point setting for setting a new zero point correction value based on the error discharge command means for outputting the opening command signal for opening / closing means to the opening / closing means and the empty weight of the specific weighing hopper from which the object to be weighed is discharged. Means, and when a combination within the allowable range is not selected, the first
A combination weighing device comprising: an error discharge command means and a priority operation control means for operating the second zero point setting means in preference to setting a new zero point correction value by the zero point setting means.
らに、 所定の零点設定要求タイミングで特定の計量ホッパのす
べての収納室を開放して被計量物を排出させた上で、そ
の計量ホッパの重量に基づいて新たな零点補正値を設定
する第３工程を備え、 第１工程と第２工程とが実行されなかった状態で、上記
特定の計量ホッパについて所定の零点設定要求タイミン
グに達したとき、第３工程を優先して実行する組合せ計
量方法。5. The combination weighing method according to claim 3, further comprising: opening all storage chambers of a specific weighing hopper at a predetermined zero point setting request timing to discharge the object to be weighed, and then discharging the weighing hopper. When a predetermined zero point setting request timing is reached for the specific weighing hopper in a state in which the third step for setting a new zero point correction value based on the weight is provided and the first step and the second step are not executed , A combination weighing method which preferentially executes the third step.
らに、 所定の零点設定要求タイミングで特定の計量ホッパのす
べての収納室を開放して被計量物を排出させる強制排出
指令手段と、 被計量物が排出された上記特定の計量ホッパの重量に基
づいて新たな零点補正値を設定する第３零点設定手段と
を備え、 優先作動制御手段は、第１および第２零点設定手段によ
る新たな零点補正値の設定がなされずに、上記特定の計
量ホッパについて所定の零点設定要求タイミングに達し
たとき、強制排出指令手段および第３零点設定手段を優
先して作動させることを特徴とする組合せ計量装置。6. The combination weighing device according to claim 4, further comprising: forced discharge command means for opening all storage chambers of a specific weighing hopper to discharge an object to be weighed at a predetermined zero point setting request timing; Third zero point setting means for setting a new zero point correction value based on the weight of the specific weighing hopper from which the object has been discharged, and the priority operation control means includes new zero points by the first and second zero point setting means. A combination weighing device characterized in that when the predetermined zero point setting request timing is reached for the specific weighing hopper without setting the correction value, the forced discharge command means and the third zero point setting means are preferentially operated. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35016893A JP3426312B2 (en) | 1993-12-28 | 1993-12-28 | Combination weighing method and combination weighing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35016893A JP3426312B2 (en) | 1993-12-28 | 1993-12-28 | Combination weighing method and combination weighing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07198463A true JPH07198463A (en) | 1995-08-01 |
| JP3426312B2 JP3426312B2 (en) | 2003-07-14 |
Family
ID=18408687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35016893A Expired - Fee Related JP3426312B2 (en) | 1993-12-28 | 1993-12-28 | Combination weighing method and combination weighing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3426312B2 (en) |
-
1993
- 1993-12-28 JP JP35016893A patent/JP3426312B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3426312B2 (en) | 2003-07-14 |
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