JP3571798B2 - Quantitative filling device - Google Patents

Quantitative filling device Download PDF

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Publication number
JP3571798B2
JP3571798B2 JP12137995A JP12137995A JP3571798B2 JP 3571798 B2 JP3571798 B2 JP 3571798B2 JP 12137995 A JP12137995 A JP 12137995A JP 12137995 A JP12137995 A JP 12137995A JP 3571798 B2 JP3571798 B2 JP 3571798B2
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weight
weighed
objects
addition
storage tanks
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JPH08313328A (en
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浩 樋口
勝芳 吉田
実知男 田口
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Yamato Scale Co Ltd
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Yamato Scale Co Ltd
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Description

【0001】
【産業上の利用分野】
本発明は、広範囲の被計量物の重量調節が可能な定量充填装置に関し、より詳細には、大投入用の被計量物を貯溜する大投入貯槽と、不足重量を補うための複数の加算投入用の貯槽とを設けることにより、重量の広範囲の調節及び微調節を可能とした定量充填装置に関する。
【0002】
【従来の技術】
粉粒体の定量充填は古くから行われており、その中で、升はかり、即ち容積計量は以前から広く採用されている。しかし、容積計量は後に重量による計量に変わってきた。その大きな理由は、より正確に計量する必要が生じてきたためである。例えば化学合成物などがその代表である。昔から、米、むぎ等の農産物の計量ではそれほど重要視されなかった問題である。現在主に実施されている粉粒体の定量充填装置の代表例を図3に示す。
【0003】
図3の定量充填装置では、目標重量を100%設定器51で設定し、目標重量の90%をカット値としてカット値設定器52で設定して、計量ホッパ53に被計量物を計量しながら投入する。この装置では、計量時間をできるだけ短くするために、所定量の90%までは投入用フィーダ55の振幅を大きくして搬送能力を上げて所謂大投入(大投入、90%投入等とも称している)を行う。そして、充填量が約90%に達すると、制御装置56により投入フィーダ55の振幅を小さくし、残りの10%の微量投入を行い、100%に達すれば投入を停止する。
【0004】
この微量投入のことを小投入ともいう。投入が完了すると、計量ホッパ53の下部から容器(図示せず)に被計量物が充填される。このタイプの定量充填装置は投入しながらの計量を行うものであり、充填速度を大きくすることができないという問題点がある。
【0005】
この問題点を解決するために、充填速度の向上を図った定量充填装置が例えば特開昭50−120660号公報に開示されている。このタイプの定量充填装置では、目標重量より小さく且つ目標重量に近い重量の被計量物が大投入用の貯槽に貯溜されるとともに、目標重量に満たない不足分を補うための容積の異なる複数の補助槽(副定量装置)が設けられる。そして、この装置では、目標重量から大投入貯槽内の被計量物の重量を差し引いた不足重量が求められ、この不足重量に最も近い一の補助槽が選択される。このような補助槽を設けることにより、目標重量に近い重量の被計量物の充填が可能となっている。また、この定量充填装置では投入しながらの計量が行われないため、充填速度を大きくすることが可能となっている。
【0006】
【発明が解決しようとする課題】
しかしながら、上記公報に記載のタイプの定量充填装置では、大投入用の貯槽内に投入される被計量物の重量にある程度以上のバラツキが生じる場合、何れの補助槽を選択しても不足重量を補うことができない場合が生じる。この問題点を解決するために、複数の補助槽を用いて不足重量を補うことが考えられる。しかし、大投入用の貯槽内に投入される被計量物の重量のバラツキが大きい場合、全ての補助槽を選択しても不足重量を補うことができない場合が生じ得る。この問題点を解決するために、例えば補助槽の大きさを大きくすることが考えられる。
【0007】
しかし、この場合には、どのような補助槽の組合せを選択しても目標重量に対する許容範囲内の重量を得ることができない、即ち、重量の微調整ができないという問題点が生じる。
【0008】
本発明はこのような従来技術の問題点を解決するために為されたものであり、本発明の目的は、被計量物の広範囲の重量調節と微調整が可能な定量充填装置を提供することである。
【0009】
【課題を解決するための手段】
本発明の定量充填装置は、目標重量Wより小さく且つ該目標重量Wに近い重量の大投入用の被計量物を貯溜する大投入貯槽と、加算投入用の被計量物を貯溜する所定容積の複数の加算貯槽と、前記大投入貯槽に投入された被計量物の重量を大投入重量Wとして計量する計量手段と、前記目標重量Wと前記大投入重量Wとの差W−Wを不足重量Wとして求め、該不足重量Wと被計量物のかさ密度から求めた全加算貯槽内の被計量物の合計の重量Wとに対して、前記加算貯槽の全てによる加算投入の回数n(≧0)と該n回の全加算貯槽による加算投入後の新たな不足重量Wとが、W=W−n×W、及び0≦W<Wの関係にある場合に、被計量物のかさ密度から求めた各加算貯槽内の被計量物の重量に基づいて前記不足重量Wに最も近くなる前記加算貯槽の組み合わせを選択して、前記大投入貯槽内の被計量物の排出と、前記加算貯槽の全てからの前記n回の被計量物の排出と、更に前記選択された加算貯槽からの被計量物の排出とを制御する制御手段とを備えたことを特徴とする。
【0010】
また、前記加算貯槽のうちの少なくとも一部の加算貯槽の容積が同じである構成とすることができる。
【0011】
また、前記加算貯槽のうちの少なくとも一部の加算貯槽の容積の比が、
【0012】
【数3】

Figure 0003571798
【0013】
である構成とすることができる。
【0014】
更に、前記正の実数s=2である構成とすることができる。
【0015】
【作用】
本発明の定量充填装置では、大投入を行う大投入貯槽と、この大投入を補うための加算投入を行う複数の加算貯槽とが設けられている。大投入貯槽の容積は、目標重量Wより小さく且つこの目標重量Wに近い重量の被計量物を貯溜し得るように設定されている。また、加算貯槽は加算投入用の被計量物を複数に分割して貯溜するために設けられている。大投入貯槽及び各加算貯槽への被計量物の投入は、ほぼ同時に行うことができる。大投入貯槽に投入された被計量物の重量は、計量手段によって大投入重量Wとして計量される。各加算貯槽には計量手段は設けられていない。
【0016】
制御手段は、目標重量Wから計量手段によって計量された大投入重量Wを差し引いたW−Wを不足重量Wとして求める。大投入貯槽の容積は目標重量Wより小さい重量の被計量物が貯溜されるように設定されているので、この不足重量Wの値は常に正の値となる。本発明の定量充填装置では、この不足重量Wに対し、全加算貯槽から被計量物をn回(≧0の整数)投入する大まかな加算投入と、このn回の加算投入によっては補充することができない比較的少量の加算投入とが行われる。即ち、大まかな加算投入では、被計量物のかさ密度から求めた全加算貯槽内の被計量物の合計の重量Wとすると、全加算貯槽によるn回の投入によってn×Wの被計量物が加算される。この整数nは、n回の大まかな加算投入後の新たな不足重量W=W−n×Wが、全加算貯槽内の被計量物の合計の重量Wより小さい正の値となるように、即ち、0≦W<Wを満たすように決められる。
【0017】
大まかな加算投入を補う少量の加算投入は、不足重量Wに最も近くなる加算貯槽の組み合わせを選択して排出することにより行われる。各加算貯槽内の被計量物の重量は、各加算貯槽の容積と被計量物のかさ密度とから求めることができる。加算貯槽内の被計量物の重量を求めるために使用するかさ密度の値は、計量の度に大投入重量Wを大投入貯槽の容積で除算して求めてもよく、また、予め測定した値をもとに固定した値を用いてもよい。
【0018】
本発明では、大投入貯槽からの被計量物の排出と、全加算貯槽からのn回の被計量物の排出と、不足重量Wに最も近くなる加算貯槽の組み合わせの選択と、選択された加算貯槽からの被計量物の排出とは、制御手段によって制御されている。これらの制御は、コンピュータ等を使用すれば即座に行うことができるので、本発明の充填装置を用いれば高速の充填が可能である。
【0019】
上記の構成においては、加算貯槽のうち、少なくとも一部が同じ容積を有するように構成してもよく、また、加算貯槽のうちの少なくともm個(m=加算貯槽の数)の加算貯槽の容積の比が、下記の一般式となるように構成してもよい。
【0020】
【数4】
Figure 0003571798
【0021】
ここで、sは正の実数、0<k≦mである。
【0022】
上記の数2において、sは正数であれば整数であっても小数であってもよいが、s=2とすると、加算貯槽の容積の比は、1:2:4:8…となり、広範囲かつ微量の重量調節が可能となる。
【0023】
【実施例】
本発明の実施例について、図面を参照しながらより詳細に説明する。
【0024】
図1は本発明の一実施例に係る定量充填装置の概略構成を示している。本実施例の定量充填装置は、目標重量Wの被計量物を箱、袋等の所定の容器に充填するために使用されるものであり、大投入を行う大投入貯槽1と、加算投入を行う4つの加算貯槽4a,4b,4c及び4dとを有している。大投入貯槽1の容積は、目標重量Wより小さく且つ目標重量Wに近い重量の被計量物を貯溜し得るように設定されている。大投入貯槽1と4つの加算貯槽4a〜4dには、投入装置11から被計量物が、例えば擦り切りによりほぼ同時に投入される。大投入貯槽1にはロードセル7が設けられており、大投入貯槽1に投入される大投入用の被計量物の重量は、このロードセル7により計量される。4つの加算貯槽4a〜4dにはロードセルは設けられていない。ロードセル7からの出力は、制御装置(図示せず)に入力される。
【0025】
大投入貯槽1の底部には被計量物を排出するためのゲート8が設けられており、また、加算貯槽4a〜4dにもそれぞれ独立に開閉する4つのゲート6が設けられている。大投入貯槽1及び加算貯槽4a〜4d内の被計量物は、シュート9を通じて箱、袋等の容器10に排出される。上述のゲート8及び4つのゲート6の開閉は、前述の制御装置の制御により行われる。
【0026】
加算貯槽4a〜4dの容積比は、sk−1 (sは正の実数、k≦m、m=加算貯槽の数)の式に於いて、s=2及びm=4とした比、即ち、1:2:4:8となっている。
【0027】
本実施例の装置では、図2のフローチャートに従って定量充填が行われる。まず、ステップ21でシュート9の下部に容器10がセットされ、ステップ22で大投入貯槽1及び4つの加算貯槽4a〜4dに投入装置11から被計量物が投入される。大投入貯槽1に投入された被計量物の重量は、大投入重量Wとしてロードセル7により計量される。
【0028】
次に、ステップ23で不足重量W=大投入重量W−目標重量Wが求められ、この不足重量Wに最も近い加算貯槽の組合せが選択される。ステップ24では選択された加算貯槽内の被計量物により不足重量Wを補うことができるか否か、換言すれば、選択された加算貯槽内の被計量物の重量が不足重量Wに達しているか否かが調べられる。そして、選択された加算貯槽内の被計量物の重量が不足重量Wに達した場合には、ステップ25に進んで大投入貯槽1と選択された加算貯槽内の被計量物が排出される。この被計量物の排出は、前述の制御装置によるゲート8及び4つのゲート6の開閉の制御により行われる。
【0029】
また、ステップ23で全ての加算貯槽4a〜4dを選択しても不足重量Wに達しない場合には、ステップ27に進んで大投入貯槽1及び全加算貯槽4a〜4d内の被計量物を排出するとともに、新たな不足重量W=W−Wが求められる。ここでWは、全加算貯槽4a〜4d内の被計量物の合計の重量であり、被計量物のかさ密度と加算貯槽4a〜4dの全容積とによって求められる。被計量物のかさ密度は、大投入重量Wを大投入貯槽1の容積で除算することによって計量の度に求めてもよく、また、予め測定した値をもとに固定した値を用いてもよい。
【0030】
次に、ステップ28では加算貯槽4a〜4dのみに被計量物が投入され、ステップ29で新たな不足重量Wに最も近い加算貯槽の組合せが選択される。ステップ30では選択された加算貯槽内の被計量物の重量が不足重量Wに達しているか否かが調べられる。そして、選択された加算貯槽内の被計量物の重量が不足重量Wに達している場合には、ステップ31に進んで選択された加算貯槽内の被計量物が排出される。
【0031】
また、ステップ30で全ての加算貯槽4a〜4dを選択しても不足重量Wに達しない場合には、ステップ32に進んで全加算貯槽4a〜4d内の被計量物を排出するとともに、ステップ33で更に新たな不足重量W=W−Wが求められる。そして、再びステップ28に進んで加算貯槽4a〜4dのみに被計量物が投入され、ステップ29で新たな不足重量Wに最も近い加算貯槽の組合せが選択される。更に、ステップ30で、選択された加算貯槽内の被計量物の重量が不足重量Wに達しているか否かが調べられ、その結果によって、前述と同様にステップ31又はステップ32に進んで処理が行われる。このように、選択された加算貯槽によって不足重量Wの補充が完全に行えるまでステップ30,32,33,28,29が繰り返される。ステップ25で大投入貯槽1及び選択された加算貯槽内の被計量物が排出され、又はステップ31で選択された加算貯槽内の被計量物が排出されると、ステップ26で空の容器に取り替えられる。以上のようにして1回の定量充填が完了すると、ステップ22に進んで次の定量充填操作が開始される。
【0032】
本実施例の定量充填装置では、加算貯槽4a〜4dの容積比が1:2:4:8となっているので、最小の加算貯槽4aに貯溜されている被計量物の重量の1〜15倍の加算用の被計量物を準備したことになる。また、これらの加算貯槽4a〜4dによる加算投入は目標重量Wに達するまで繰り返し行うことができるので、加算投入される被計量物の重量の制限はない。従って、被計量物の重量を広い範囲で調節することができ、しかも、最も容積の小さい加算貯槽4a内の被計量物を最小単位とする重量の微調節が可能となっている。また、不足重量W及びWを求める演算と、不足重量W及び不足重量Wに最も近くなる加算貯槽の組合せの選択は、コンピュータ等を用いた制御装置に於いて高速に行われるので、充填速度が非常に高速となっている。
【0033】
なお、上記実施例では加算貯槽を4つ設けた場合について説明したが、本発明はこれに限定されるものではなく、任意の数とすることができる。また、上記各実施例では正の整数sを2とした場合について説明したがこれに限定されるものではなく、これ以外の整数でも、また、小数であってもよく、一部又は全ての加算貯槽の容積が同じであってもよい。更に、本実施例では大投入貯槽1からの大投入は、加算貯槽4a〜4dからの最初の排出の際、即ちステップ25又はステップ27に於いて行う構成について説明したが、この大投入は大投入貯槽1内の被計量物の計量後、即ちステップ23以降であれば、図2のフローチャートの何れの時点に於いて行ってもよい。
【0034】
【発明の効果】
本発明の定量充填装置では複数の加算貯槽が設けられており、これらの加算貯槽による加算投入は目標重量に達するまで繰り返し行うことができるので、原理的に加算投入される被計量物の重量の制限はなくなり、被計量物の重量を広い範囲で調節できる。しかも、最小容積の加算貯槽内の被計量物を最小単位とする重量の微調節が可能となっている。また、不足重量を求める演算と、不足重量に最も近くなる加算貯槽の組合せの選択は、コンピュータ等を用いた制御装置に於いて高速に行われるので、充填速度が非常に高速となっている。
【図面の簡単な説明】
【図1】本発明の一実施例に係る定量充填装置の概略構成図である。
【図2】図1の充填装置で実施される定量充填方法を示すフローチャートである。
【図3】振動フィーダを備えた従来の定量充填装置の概略構成図である。
【符号の説明】
1 大投入貯槽
4a〜4d 加算貯槽
6,8 ゲート
7 ロードセル
9 シュート
10 容器
11 投入装置[0001]
[Industrial applications]
The present invention relates to a fixed-quantity filling device capable of adjusting the weight of a wide range of objects to be weighed, and more particularly, to a large input storage tank for storing a large input object to be weighed, and a plurality of additional inputs to compensate for insufficient weight. The present invention relates to a fixed-quantity filling device capable of providing a wide range of adjustment and fine adjustment of weight by providing a storage tank.
[0002]
[Prior art]
Quantitative filling of powders and granules has been performed for a long time, in which weighing, that is, volumetric measurement, has been widely adopted for a long time. However, volumetric weighing was later replaced by weighing. The main reason is that more accurate weighing has become necessary. For example, a chemical compound is a typical example. From a long time ago, the measurement of agricultural products such as rice and barley has been a less important issue. FIG. 3 shows a typical example of a device for quantitatively filling powders and granules which is currently mainly used.
[0003]
3, the target weight is set by the 100% setter 51, 90% of the target weight is set as the cut value by the cut value setter 52, and the object to be weighed is weighed by the weighing hopper 53. throw into. In this apparatus, in order to shorten the weighing time as much as possible, up to 90% of the predetermined amount, the amplitude of the feeding feeder 55 is increased to increase the conveying capacity, and so-called large loading (large loading, 90% loading, etc.). )I do. Then, when the filling amount reaches about 90%, the amplitude of the feeding feeder 55 is reduced by the control device 56, and the remaining 10% of the small amount is fed. When the filling amount reaches 100%, the feeding is stopped.
[0004]
This small input is also referred to as small input. When the charging is completed, the container (not shown) is filled with the objects to be weighed from below the weighing hopper 53. This type of fixed-quantity filling apparatus performs measurement while charging, and has a problem that the filling speed cannot be increased.
[0005]
In order to solve this problem, a quantitative filling apparatus for improving the filling speed is disclosed in, for example, JP-A-50-120660. In this type of fixed-quantity filling device, an object to be weighed having a weight smaller than the target weight and close to the target weight is stored in the storage tank for large input, and a plurality of objects having different volumes to compensate for the shortage less than the target weight. An auxiliary tank (sub-quantitation device) is provided. In this apparatus, the insufficient weight is obtained by subtracting the weight of the object to be weighed in the large input storage tank from the target weight, and one auxiliary tank closest to the insufficient weight is selected. By providing such an auxiliary tank, the object to be weighed having a weight close to the target weight can be filled. In addition, since the metering is not performed while the fixed filling device is charged, the filling speed can be increased.
[0006]
[Problems to be solved by the invention]
However, in the fixed-quantity filling apparatus of the type described in the above-mentioned publication, if the weight of the objects to be weighed to be charged into the storage tank for large charging has a certain degree of variation, the insufficient weight is reduced regardless of which auxiliary tank is selected. In some cases, this cannot be compensated. In order to solve this problem, it is conceivable to make up for the insufficient weight by using a plurality of auxiliary tanks. However, if the weight of the objects to be weighed into the large storage tank has a large variation, it may not be possible to compensate for the insufficient weight even if all the auxiliary tanks are selected. In order to solve this problem, for example, it is conceivable to increase the size of the auxiliary tank.
[0007]
However, in this case, no matter what combination of auxiliary tanks is selected, there is a problem that a weight within an allowable range with respect to the target weight cannot be obtained, that is, the weight cannot be finely adjusted.
[0008]
The present invention has been made to solve such problems of the prior art, and an object of the present invention is to provide a fixed-quantity filling apparatus capable of adjusting the weight and finely adjusting a wide range of an object to be weighed. It is.
[0009]
[Means for Solving the Problems]
Predetermined quantitative filling device of the present invention, the reservoir and the large input reservoirs for reserving the target weight W o from small and objects to be weighed for the full flow of near weight to the target weight W o, the objects to be weighed for addition-on the difference W between the plurality of summing reservoir volume, and metering means for metering the weight of the objects to be weighed which the thrown into a large input reservoirs as full flow weight W a, and the target weight W o the large-on weight W a o seek -W a as insufficient weight W b, relative to the weight W c of the sum of the objects to be weighed inside the full addition reservoir determined from the bulk density of said non paw weight W b and the object to be weighed, the addition reservoir number of additions introduced by all n and (≧ 0) and a new lack weight W d after addition turned by full addition reservoir of the n times, W d = W b -n × W c, and 0 ≦ W d < when a relation of W c, the objects to be weighed in each addition reservoir determined from the bulk density of the articles And selecting a combination of the addition reservoir closest to the lack weight W d based on the amount, the the discharge of the objects to be weighed in the large input reservoirs, the n times of the objects to be weighed from all of the addition reservoir And discharge means for controlling the discharge of the object to be weighed from the selected addition storage tank.
[0010]
In addition, at least some of the additional storage tanks may have the same volume.
[0011]
Further, the ratio of the volumes of at least some of the additional storage tanks of the additional storage tank is
[0012]
(Equation 3)
Figure 0003571798
[0013]
May be adopted.
[0014]
Further, the positive real number s = 2 may be employed.
[0015]
[Action]
The fixed-quantity filling device of the present invention is provided with a large input storage tank for performing a large input and a plurality of additional storage tanks for performing an additional input to supplement the large input. The volume of the large input reservoirs is set a target weight W o from small and the weight of the objects to be weighed close to this target weight W o so as to reservoir. In addition, the addition storage tank is provided to store the object to be weighed for addition and addition divided into a plurality of pieces. The objects to be weighed can be input to the large input storage tank and each addition storage tank almost simultaneously. Weight of the objects to be weighed which have been put into the large input reservoirs is metered as a full flow weight W a by the metering means. No measuring means is provided in each addition storage tank.
[0016]
Control means determines the W o -W a from the target weight W o minus the full flow weight W a which is metered by the metering means as insufficient weight W b. Since the volume of the large input reservoirs are objects to be weighed of the target weight W o is smaller than the weight is set to be the reservoir, the value of the missing weight W b is always a positive value. In quantitative filling device of the present invention, with respect to the lack of weight W b, and rough adding-on to turned objects to be weighed to n times (≧ 0 integer) from the full addition reservoir, refilling by addition on of the n times A relatively small amount of additions that cannot be performed. That is, in the rough summing-up, when the sum of the weight W c of the objects to be weighed inside the full addition reservoir determined from the bulk density of the objects to be weighed, weighing of n × W c by n times of input by full adder reservoir Things are added. The integer n, a new lack weight W d = W b -n × W c after rough summing up of the n times, the weight W c positive value less than the sum of the objects to be weighed inside the full adder reservoir Is determined, that is, 0 ≦ W d <W c is satisfied.
[0017]
A small amount of addition-up to compensate for the rough summing-up is performed by discharging to select a combination of closest comprising adding reservoir shortage weight W d. The weight of the object to be weighed in each addition storage tank can be obtained from the volume of each addition storage tank and the bulk density of the object to be weighed. The value of bulk density is used to determine the weight of the objects to be weighed in the addition reservoir, the full flow weight W a every metering may be determined by dividing the volume of the large input reservoirs, also measured in advance A fixed value based on the value may be used.
[0018]
In the present invention, the discharge of the objects to be weighed from the large input reservoirs, a discharge of n times of the objects to be weighed from the full addition reservoir, and selection of a combination of closest consisting addition reservoir to insufficient weight W d, it is selected The discharge of the object to be weighed from the addition storage tank is controlled by the control means. Since these controls can be performed immediately using a computer or the like, high-speed filling is possible using the filling device of the present invention.
[0019]
In the above configuration, at least a part of the additional storage tanks may have the same volume, and at least m (m = the number of additional storage tanks) of the additional storage tanks may have the same volume. May be configured so as to satisfy the following general formula.
[0020]
(Equation 4)
Figure 0003571798
[0021]
Here, s is a positive real number, and 0 <k ≦ m.
[0022]
In the above Equation 2, s may be an integer or a decimal number as long as it is a positive number. If s = 2, the ratio of the volumes of the additional storage tanks is 1: 2: 4: 8. A wide and small amount of weight adjustment is possible.
[0023]
【Example】
Embodiments of the present invention will be described in more detail with reference to the drawings.
[0024]
FIG. 1 shows a schematic configuration of a quantitative filling apparatus according to one embodiment of the present invention. Determination filling apparatus of the present embodiment, the box the objects to be weighed of the target weight W o, is what is used to fill a predetermined container bag or the like, a large input reservoirs 1 for full flow, adding-on And four addition storage tanks 4a, 4b, 4c, and 4d for performing the above. The volume of the large input reservoirs 1 is set to the target weight W o from small and the weight close to the target weight W o objects to be weighed so as to reservoir. The objects to be weighed are charged into the large charging storage tank 1 and the four additional storage tanks 4a to 4d from the charging device 11 almost simultaneously, for example, by rubbing. The large input storage tank 1 is provided with a load cell 7, and the weight of the large input object to be input into the large input storage tank 1 is measured by the load cell 7. No load cells are provided in the four addition storage tanks 4a to 4d. The output from the load cell 7 is input to a control device (not shown).
[0025]
A gate 8 for discharging the objects to be weighed is provided at the bottom of the large input storage tank 1, and four gates 6 which are opened and closed independently of each other are also provided in the addition storage tanks 4a to 4d. The objects to be weighed in the large input storage tank 1 and the addition storage tanks 4a to 4d are discharged through a chute 9 into a container 10 such as a box or a bag. The opening and closing of the gate 8 and the four gates 6 are performed under the control of the control device described above.
[0026]
The volume ratio of the addition storage tanks 4a to 4d is a ratio of s k-1 (s is a positive real number, k ≦ m, m = the number of addition storage tanks) in which s = 2 and m = 4, that is, , 1: 2: 4: 8.
[0027]
In the apparatus of the present embodiment, the fixed amount filling is performed according to the flowchart of FIG. First, in step 21, the container 10 is set below the chute 9, and in step 22, the objects to be weighed are charged from the charging device 11 into the large charging storage tank 1 and the four additional storage tanks 4 a to 4 d. The weight of the object to be weighed put into the large input storage tank 1 is measured by the load cell 7 as a large input weight Wa.
[0028]
Next, insufficient weight W b = full flow weight W a in step 23 - the target weight W o is determined, the combination of the nearest addition reservoir to the lack weight W b is selected. Whether it is possible to compensate for the lack weight W b by the articles of the step 24 in the selected sum storage tank, in other words, the weight of the objects to be weighed in the addition tank selected reaches the insufficient weight W b It is checked whether it is. When the weight of the objects to be weighed in the addition tank that is selected has reached the missing weight W b is the articles of the large input reservoirs 1 and selected added the reservoir is discharged proceeds to step 25 . The discharge of the object is performed by controlling the opening and closing of the gate 8 and the four gates 6 by the control device described above.
[0029]
When it is not reached for all missing be selected addition reservoir 4a~4d weight W b in step 23, the objects to be weighed of the large input reservoirs 1 and the full addition reservoir 4a~4d proceeds to step 27 while discharging, new shortage weight W d = W b -W c are determined. Here W c is the total weight of the objects to be weighed inside the full addition reservoir 4 a to 4 d, are determined by the total volume of the addition tank 4 a to 4 d and the bulk density of the objects to be weighed. The bulk density of the articles may be required each time a metered by dividing the full flow weight W a by volume of the large input reservoirs 1, also with a value fixed on the basis of the previously measured value Is also good.
[0030]
Then, the objects to be weighed are put only in the addition tank 4a~4d In step 28, the combination of the nearest addition reservoir to the new shortage weight W d in step 29 is selected. Whether the weight of the objects to be weighed at step 30 the selected sum the reservoir has reached the missing weight W d is examined. When the weight of the objects to be weighed in the addition tank selected has reached the missing weight W d is the articles in the addition tank selected the routine proceeds to step 31 is discharged.
[0031]
Further, in the case it does not reach all of the addition reservoir 4a~4d shortage be selected weight W d step 30, as to discharge the objects to be weighed inside the full addition reservoir 4a~4d proceeds to step 32, step further new insufficient weight W d = W d -W c at 33 is obtained. Then, the objects to be weighed are put only in the addition tank 4a~4d proceeds to step 28 again, the combination of the nearest addition reservoir to the new shortage weight W d in step 29 is selected. Further, in step 30, whether the weight of the objects to be weighed in the addition tank selected has reached the missing weight W d is examined and the result, the routine proceeds to step 31 or step 32 as before treatment Is performed. Thus, step 30,32,33,28,29 are repeated until the replenishment of shortage weight W d by adding reservoirs selected performed completely. When the object to be weighed in the large input storage tank 1 and the selected additional storage tank is discharged in step 25, or the object to be weighed in the additional storage tank selected in step 31 is discharged, the empty container is replaced in step 26. Can be When one fixed amount filling is completed as described above, the process proceeds to step 22 and the next fixed amount filling operation is started.
[0032]
In the quantitative filling device of the present embodiment, since the volume ratio of the additional storage tanks 4a to 4d is 1: 2: 4: 8, the weight of the objects to be weighed stored in the minimum additional storage tank 4a is 1 to 15%. This means that an object to be weighed for double addition is prepared. The addition introduced by these addition reservoir 4a~4d so can be repeated until a target weight W o, no weight limitation of the objects to be weighed to be added on. Therefore, the weight of the object to be weighed can be adjusted in a wide range, and the weight of the object to be weighed in the addition storage tank 4a having the smallest volume can be finely adjusted using the minimum unit. Further, a calculation for obtaining the missing weight W b and W d, the choice of the combination of the nearest comprising adding reservoir shortage weight W b and under the weight W d, since carried out at a high speed at the control device using a computer or the like , The filling speed is very high.
[0033]
In the above embodiment, the case where four addition storage tanks are provided has been described. However, the present invention is not limited to this, and any number can be used. Further, in each of the above embodiments, the case where the positive integer s is set to 2 has been described. However, the present invention is not limited to this, and other integers or decimal numbers may be used. The storage tanks may have the same volume. Further, in the present embodiment, the configuration in which the large input from the large input storage tank 1 is performed at the time of the first discharge from the addition storage tanks 4a to 4d, that is, in the step 25 or the step 27, has been described. After the measurement of the objects to be weighed in the charging storage tank 1, that is, after step 23, the measurement may be performed at any time in the flowchart of FIG.
[0034]
【The invention's effect】
In the quantitative filling device of the present invention, a plurality of addition storage tanks are provided, and addition and addition by these addition storage tanks can be repeatedly performed until the target weight is reached. There is no limit and the weight of the object can be adjusted in a wide range. Moreover, it is possible to finely adjust the weight by using the object to be weighed in the minimum volume addition storage tank as the minimum unit. In addition, since the calculation for obtaining the insufficient weight and the selection of the combination of the additional storage tanks which are closest to the insufficient weight are performed at high speed in a control device using a computer or the like, the filling speed is extremely high.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a quantitative filling device according to one embodiment of the present invention.
FIG. 2 is a flowchart showing a fixed-quantity filling method performed by the filling device of FIG.
FIG. 3 is a schematic configuration diagram of a conventional fixed-quantity filling device provided with a vibration feeder.
[Explanation of symbols]
1 Large input storage tanks 4a to 4d Additional storage tanks 6, 8 Gate 7 Load cell 9 Chute 10 Container 11 Input device

Claims (4)

目標重量Wより小さく且つ該目標重量Wに近い重量の大投入用の被計量物を貯溜する大投入貯槽と、
加算投入用の被計量物を貯溜する所定容積の複数の加算貯槽と、
前記大投入貯槽に投入された被計量物の重量を大投入重量Wとして計量する計量手段と、
前記目標重量Wと前記大投入重量Wとの差W−Wを不足重量Wとして求め、該不足重量Wと被計量物のかさ密度から求めた全加算貯槽内の被計量物の合計の重量Wとに対して、前記加算貯槽の全てによる加算投入の回数n(≧0)と該n回の全加算貯槽による加算投入後の新たな不足重量Wとが、
Figure 0003571798
の関係にある場合に、被計量物のかさ密度から求めた各加算貯槽内の被計量物の重量に基づいて前記不足重量Wに最も近くなる前記加算貯槽の組み合わせを選択して、前記大投入貯槽内の被計量物の排出と、前記加算貯槽の全てからの前記n回の被計量物の排出と、更に前記選択された加算貯槽からの被計量物の排出とを制御する制御手段と
を備えたことを特徴とする定量充填装置。
A large input reservoirs for reserving the target weight W o from small and the target weight W o to the objects to be weighed nearly weight for full flow,
A plurality of additional storage tanks of a predetermined volume for storing the objects to be weighed for additional charging;
A metering means for metering the weight of the objects to be weighed which the thrown into a large input reservoirs as full flow weight W a,
The difference W o -W a seek as insufficient weight W b, the articles in the full adder reservoir determined from the bulk density of said non paw weight W b and the object to be weighed and said target weight W o and said full flow weight W a against the total weight W c of the object, the number of additions introduced by all of the addition tank n and (≧ 0) and a new lack weight W d after addition turned by full addition reservoir of the n times,
Figure 0003571798
If there a relationship, by selecting the combination of the addition reservoir closest to the lack weight W d, based on the weight of the objects to be weighed in each addition reservoir determined from the bulk density of the objects to be weighed, the size Control means for controlling the discharge of the objects to be weighed in the input storage tank, the discharge of the n times of the objects to be weighed from all of the addition storage tanks, and the discharge of the objects to be weighed from the selected addition storage tanks; A fixed-quantity filling device comprising:
前記加算貯槽のうちの少なくとも一部の加算貯槽の容積が同じである請求項1記載の被計量物の定量充填装置。The fixed-quantity filling device for an object to be weighed according to claim 1, wherein at least some of the additional storage tanks have the same volume. 前記加算貯槽のうちの少なくとも一部の加算貯槽の容積の比が、
Figure 0003571798
であることを特徴とする請求項1記載の被計量物の定量充填装置。
The ratio of the volume of at least some of the additional storage tanks of the additional storage tank is
Figure 0003571798
The fixed quantity filling device for an object to be weighed according to claim 1, wherein:
前記正の実数s=2である請求項3記載の被計量物の定量充填装置。4. The apparatus according to claim 3, wherein the positive real number s = 2. 5.
JP12137995A 1995-05-19 1995-05-19 Quantitative filling device Expired - Lifetime JP3571798B2 (en)

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