JP3983706B2

JP3983706B2 - Powder metering device

Info

Publication number: JP3983706B2
Application number: JP2003101336A
Authority: JP
Inventors: 輝也平田
Original assignee: 大盛工業株式会社
Priority date: 2003-04-04
Filing date: 2003-04-04
Publication date: 2007-09-26
Anticipated expiration: 2023-04-04
Also published as: JP2004309244A

Description

【０００１】
【発明の属する技術分野】
本発明は、粉体貯室から外部へ供給される粉体の重量を連続的又は間欠的に計測して供給量を計量する粉体計量供給装置に関し、詳しくは低コストで精度良く計量でき、しかも既設の粉体供給装置へ後付けを可能にする技術に関する。
【０００２】
【従来の技術】
従来の粉体計量供給装置は、図１１に示すように粉体を貯留したホッパーの自重を計測するロードセル２４をチャージホッパー２０とは別の計量用ホッパー２３本体に付設し、計量用ホッパー２３からの粉体の吐出時に初期自重値から現自重値を引算した減少値を供給した粉体の重量値として供給量を計量するようにした減量式が一般的である（特許文献１参照）。
【０００３】
ところで、前記構成は、ホッパーをチャージ用と計量用の２体が必要で元来高コストの設備であった。また、供給と並行してチャージホッパー２０から不足分の粉体を計量用ホッパー２３にチャージすると、その衝撃で計量値が変化してチャージ中に計量が行えないし、その無計量中にチャージの影響で供給状態が変化しても異常を発見することができなかった。さらに、このチャージ時間を短縮するためにフィーダの能力を大きくすると設備費が高騰するという問題もあった。
【０００４】
【特許文献１】
特開２００２−３２３３６５公報
【０００５】
【発明が解決しようとする課題】
本発明が解決しようとする課題は、従来のこれらの問題点を解消し、ホッパーに粉体をチャージ中でも衝撃の影響を受けずに並行して計量でき、しかも計量用ホッパーを別途とせず一つのホッパーで低コストに計量でき、さらに既設の粉体供給装置へ後付けも可能にする粉体計量供給装置を提供することにある。
【０００６】
【課題を解決するための手段】
かかる課題を解決した本発明の構成は、
１）粉体貯室の排出口下方に取り付けられるケーシングに粉体貯室の排出口と連通する開口部を上面に吐出口を底面に設け、円盤の外周縁に複数の羽根を所定間隔おいて放射状に突設した供給盤をケーシングの底部で回転自在に設け、投入口を備えた摺切り板を供給盤の羽根の上端高さでその羽根の回転軌跡面を覆うように設け、供給盤の羽根とケーシングの底面とで仕切られた空間を摺切り板の投入口から落下した粉体が所定量収容される粉体空間とし、供給盤の回転で摺り切られた粉体を吐出口から外部へ定量供給できるようにした粉体供給装置において、前記ケーシング底面の摺り切られた粉体が通過する位置に計量孔を開口し、同計量孔に重量計測器の計測面を配設し、しかも摺切り板の計測面の部分を含むそれ以降の厚みを薄くして羽根上端部に空隙が形成されるようにし、同計測面を通過する粉体の重量を計測してその重量値と供給盤の回転数に基づいて粉体の供給量を計量できるようにしたことを特徴とする粉体計量供給装置
２）粉体貯室の排出口下方に取り付けられるケーシングに粉体貯室の排出口と連通する開口部を上面に吐出口を底面に設け、円盤の外周縁に複数の羽根を所定間隔おいて放射状に突設した供給盤をケーシングの底部で回転自在に設け、投入口を備えた仕切り板を供給盤の羽根の上端高さでその羽根の回転軌跡面を覆うように設け、供給盤と同じ構造の補助供給盤を供給盤の回転軸に仕切り板上で装着し、仕切り板の投入口と対向する位置に投入口を備えた摺切り板を補助供給盤の羽根の上端高さでその羽根の回転軌跡面を覆うように設け、供給盤及び補助供給盤の羽根と仕切り板とケーシングの底面とで仕切られた各空間を仕切り板及び摺切り板の投入口から落下した粉体が所定量収容される粉体空間とし、補助供給盤の回転で摺り切られた所定量の粉体を下方の供給盤の粉体空間へ移送して吐出口から外部へ定量供給できるようにした粉体供給装置であって、前記ケーシング底面の摺り切られた粉体が通過する位置に計量孔を開口し、同計量孔に重量計測器の計測面を配設し、しかも供給盤の羽根の高さを補助供給盤の羽根より高く形成し、補助供給盤で摺り切られた粉体を供給盤の粉体空間へ収容した際粉体上方に空気層が形成されるようにし、仕切り板からの荷重を無くして計量に影響しないようにし、同計測面を通過する粉体の重量を計測してその重量値と供給盤の回転数に基づいて粉体の供給量を計量できるようにしたことを特徴とする粉体計量供給装置
３）ケーシングの計量孔と重量計測器の計測面との間に膜状のシール部材を張設し、計量孔から粉体が漏出しないようにした前記１）又は２）記載の粉体計量供給装置
にある。
【０００７】
【作用】
本発明によれば、粉体供給装置のケーシングの下方一部に計量孔を開口し、同計量孔に重量計測器の計測面を配設したから、供給される粉体が直接計測面に載り、粉体のみの重量が連続的又は間欠的に計測される。従って、従来のようにホッパーを含めた重量を計測しないから、計量用のホッパーを別途必要とせず一つのホッパーで計量が行え、チャージの衝撃がホッパーから粉体供給装置へ直接伝播しない限りチャージ中も計量が可能となる。また、ケーシングの下方一部を開口するシンプルな構造であるから、既設の粉体供給装置に大掛かりな工事を必要とせず容易に後付けでき、低コストで実施できる。
【０００８】
【発明の実施の形態】
本発明では、ケーシングの計量孔と重量計測器の計測面との間にダイアフラム等の膜状のシール部材を張設すると、計量孔から粉体の漏出を防止するとともに正確な計量が行える。計量手段としては、計測面を通過する粉体の重量を計測してその重量値と供給盤の回転数に基づいて粉体の供給量を演算するプログラム又は回路を備えたコントローラが設けられる。
【０００９】
投入口を備えた仕切り板を供給盤の羽根の上端高さでその羽根の回転軌跡面を覆うように設け、供給盤と同じ構造の補助供給盤を供給盤の回転軸に仕切り板上で装着し、仕切り板の投入口と対向する位置に投入口を備えた摺切り板を補助供給盤の羽根の上端高さでその羽根の回転軌跡面を覆うように設けると、補助供給盤の回転で摺り切られた定容積の粉体を下方の供給盤の粉体空間へ移送して吐出口から外部へ安定的に定量供給される。この供給盤の羽根の高さを補助供給盤の羽根より高く形成すると、補助供給盤で摺り切られた粉体を供給盤の粉体空間へ収容した際粉体上方に空気層が形成され、仕切り板からの荷重を無くして計量に影響しないようにできる。
【００１０】
供給盤としては、円盤の外周縁に複数の羽根を所定間隔おいて放射状に突設し、供給盤の羽根とケーシングの内壁面と底面とで仕切られた空間を粉体空間とする構造が一般的であるが、この供給盤の外周にさらにリングを取り付け、供給盤の羽根とリングの内壁面とケーシングの底面とで仕切られた空間を粉体空間とする構造も採用できる。また、大型の撹拌筒等の粉体貯室の下部に排出口を複数設け、各排出口に本発明の粉体計量供給装置をそれぞれ取り付けると、粉体を独立して計量しながら同時に多方向へ供給できる。以下、本発明の各実施例を図面に基づいて具体的に説明する。
【００１１】
【実施例】
実施例１（図１〜４参照）：図１〜４に示す実施例１は１段の供給盤を設けた例である。図１は実施例１の粉体計量供給装置の一部断面説明図、図２は図１のＡ−Ａ断面図、図３は実施例１の粉体計量を示す説明図、図４は図２のＡ−Ａ断面図である。
【００１２】
図中、１は粉体計量供給装置、２はケーシング、２ａは開口部、２ｂは吐出口、２ｃは摺切り板、２ｄは投入口、２ｅは計量孔、２ｆは取付治具、３は減速機付きモータ、３ａは回転軸、４は供給盤、４ａは羽根、４ｂは粉体空間、４ｃはＶリング、６は撹拌体、７はダイアフラム、８はロードセル、８ａは秤台、８ｂは受圧板、８ｃはボルト、９はインバータ、１０はコントローラ、１１はホッパー、１１ａは排出口、１２はシュート、Ａは空気層、Ｆは粉体である。
【００１３】
実施例１の粉体計量供給装置１は、図１，２に示すように粉体貯室であるホッパー１１の排出口１１ａに上面に開口部２ａと底面に吐出口２ｂが形成されたケーシング２を取り付け、同ケーシング２の下部に減速機付きモータ３を取り付けてその回転軸３ａをケーシング２内に垂直に配設し、同回転軸３ａに外周縁に複数の羽根４ａを放射状に突設した供給盤４をケーシング２の底部で軸着し、供給盤４の上方に円錐状の撹拌体６を軸着し、ケーシング２の内壁に半輪状の摺切り板２ｃを供給盤４の羽根４ａ上端高さで羽根４ａの回転軌跡面を覆うように取り付けて投入口２ｄを形成している。摺切り板２ｃは図４に示すように計測面の部分を含むそれ以降の厚みを薄くし、羽根４ａ上端部に空隙が形成されるようにしている。
【００１４】
ケーシング２底面の羽根４ａの回転軌跡途中には計量孔２ｅを開口し、図３に示すようにケーシング２の下面外縁に吊設した重量計測器であるロードセル８の秤台８ａ面に計量孔２ｅの開口面積より広いダイアフラム７を介して受圧板８ｂをボルト８ｃで装着し、この秤台８ａの外周に張り出したダイアフラム７を計量孔２ｅに取付治具２ｆで密閉するように張設している。コントローラ１０は減速機付きモータ３を制御する制御回路と、回転軸３ａの回転数信号及びロードセル８の計測信号（重量値）に基づいて粉体Ｆの供給量を算出する演算回路とを備えている。
【００１５】
実施例１では、減速機付きモータ３の駆動力による供給盤４と撹拌体６の回転でホッパー１１に貯留されていた粉体Ｆが排出口１１ａからケーシング２の開口部２ａへ取り込まれて撹拌体６で撹拌されながら下方の投入口２ｄへ送られ、送られた粉体Ｆは供給盤４の外周壁面と隣接する各羽根４ａ側面とケーシング２の側壁面と底面とで仕切られた各粉体空間４ｂにそれぞれ落下して収容され、供給盤４の回転で各粉体空間４ｂに収容された粉体Ｆが摺切り板２ｃで順に摺り切られてほぼ粉体空間４ｂの容積分充填された状態で周方向へ移送される。
【００１６】
各粉体空間４ｂに収容された粉体Ｆは、図３に示すように周方向へ移送途中にロードセル８の受圧板８ｂ上を通過する。このとき、図４に示すように薄板化された摺切り板２ｃの下方に空気層Ａが形成されるから、計測時に吐出口２ｂ側又は外部と均圧することで受圧板８ｂに対する空気圧の影響が防止されて精度良く計測される。この受圧板８ｂ上に一時的に載上する粉体Ｆの重量がロードセル８で連続的又は間欠的に計測され、コントローラ１０はロードセル８の計測した重量値と回転軸３ａの単位時間当たりの回転数でもって粉体Ｆの供給量を算出して計量される。粉体Ｆは、その後吐出口２ｂから吐出されてシュート１２で所定場所へ供給される。
【００１７】
実施例１はこのように構成したから、供給される粉体Ｆが直接計測面に載り、粉体Ｆのみの重量が連続的又は間欠的に計測される。従って、従来のようにホッパーを含めた重量を計測しないから、計量用のホッパーを別途必要とせず一つのホッパーで計量が行え、しかもチャージの衝撃が粉体供給装置へ直接伝播しないからチャージ中も計量が可能となった。また、ケーシング２の下方一部に形成した計量孔２ｅへ計測面を配設するというシンプルな構造であるから、既設の粉体供給装置に大掛かりな工事を必要とせずに容易に後付けでき、低コストで実施できる。
【００１８】
実施例２（図５〜８参照）：図５〜８に示す実施例２は供給盤を上下２段に設けた例である。図５は実施例２の粉体計量供給装置の一部断面説明図、図６は図５のＡ−Ａ断面図、図７は図５のＢ−Ｂ断面図、図８は実施例２の粉体の摺り切りを示す説明図である。図中、２ｇは仕切り板、２ｈは投入口、５は補助供給盤、５ａは羽根、５ｂは粉体空間である。
【００１９】
実施例２の粉体計量供給装置１は、図５〜７に示すように供給盤４上方の同軸上に外周縁に複数の羽根５ａを放射状に突設した補助供給盤５をそれぞれ各羽根４ａ，５ａの上下位置が合うように軸着し、半輪状の摺切り板２ｃを補助供給盤５の羽根５ａ上端高さで羽根５ａの回転軌跡面を覆うように取り付けて投入口２ｄを形成し、補助供給盤５と供給盤４の間に半輪状の仕切り板２ｇを摺切り板２ｃと反対向きで羽根４ａの回転軌跡面を覆うように取り付けて投入口２ｈを形成している。供給盤４の羽根４ａの高さは補助供給盤５の羽根５ａより１０％高く形成している。
【００２０】
実施例２では、投入口２ｄへ送られた粉体Ｆは補助供給盤５の外周壁面と隣接する各羽根４ａ側面とケーシング２の側壁面と仕切り板２ｇ上面とで仕切られた各粉体空間５ｂにそれぞれ落下して収容された後、補助供給盤５の回転で各粉体空間５ｂに収容された粉体Ｆが摺切り板２ｃで順に摺り切られてほぼ粉体空間５ｂの容積分充填された状態で周方向へ移送される。次いで、各粉体空間５ｂに収容された粉体Ｆが、直下の供給盤４の各粉体空間４ｂに投入口２ｈを通じてそれぞれ順に落下して収容され、供給盤４の回転で各粉体空間４ｂに落下した粉体Ｆが周方向に沿ってロードセル８側へ移送される。
【００２１】
このとき、図８（ａ），（ｂ）に示すように羽根４ａの高さＨ₂ が羽根５ａの高さＨ₁ より高く形成しているから、粉体空間４ｂの容積が粉体空間５ｂより大きくなっている。従って、上側で摺り切られた粉体Ｆが下側の粉体空間４ｂに収容されると粉体Ｆ上に空気層Ａが形成されるから、仕切り板２ｇの荷重圧が空気層で緩和されて圧力変動を抑制し、その後の計量に影響を与えないようにしている。また、摺切りを２回行うことでホッパー１１の排出口１１ａから投入される粉体Ｆの粉圧を緩和して衝撃を抑制し、計量を正確に行えるようにしている。その他、符号、構成は実施例１と同じである。
【００２２】
実施例３（図９，１０参照）：図９，１０に示す実施例３は、撹拌筒に実施例１の粉体計量供給装置を複数取り付けて粉体を多方向へ供給できるようにした粉体供給設備の例である。図９は実施例３の粉体供給設備の平面図、図１０は実施例３の粉体供給設備の一部省略側面図である。図中、１３は撹拌筒、１４は撹拌用モータ、１５はサポート、１６は覗き窓である。
【００２３】
実施例３では、図９，１０に示すように撹拌用モータ１４で回動する図示しない撹拌体を内包した撹拌筒１３の下面に図示しない排出口を３箇所形成し、同各排出口に粉体計量供給装置１をそのケーシング２の開口部２ａが前記排出口と連通するようにそれぞれ取り付けて粉体供給設備を構成し、撹拌筒１３の各排出口から排出された粉体Ｆが各粉体計量供給装置１でそれぞれ独立して計量しながら多方向へ同時供給できるようにしている。その他、符号、構成、作用は実施例１と同じである。
【００２４】
【発明の効果】
以上説明したように、本発明によれば粉体をチャージ中にその衝撃に影響を受けずに並行して計量でき、しかも計量用ホッパーを別途必要とせず低コストで計量でき、既設の粉体供給装置へ後付けも可能にする粉体計量供給装置を提供できる。
【図面の簡単な説明】
【図１】実施例１の粉体計量供給装置の一部断面説明図である。
【図２】図１のＡ−Ａ断面図である。
【図３】実施例の粉体計量を示す説明図である。
【図４】図２のＡ−Ａ断面図である。
【図５】実施例２の粉体計量供給装置の一部断面説明図である。
【図６】図５のＡ−Ａ断面図である。
【図７】図５のＢ−Ｂ断面図である。
【図８】実施例２の粉体の摺り切りを示す説明図である。
【図９】実施例３の粉体供給設備の平面図である。
【図１０】実施例３の粉体供給設備の一部省略側面図である。
【図１１】従来の粉体計量供給装置の説明図である。
【符号の説明】
１粉体計量供給装置
２ケーシング
２ａ開口部
２ｂ吐出口
２ｃ摺切り板
２ｄ投入口
２ｅ計量孔
２ｆ取付治具
２ｇ仕切り板
２ｈ投入口
３減速機付きモータ
３ａ回転軸
４供給盤
４ａ羽根
４ｂ粉体空間
４ｃＶリング
５補助供給盤
５ａ羽根
５ｂ粉体空間
６撹拌体
７ダイアフラム
８ロードセル
８ａ秤台
８ｂ受圧板
８ｃボルト
９インバータ
１０コントローラ
１１ホッパー
１１ａ排出口
１２シュート
１３撹拌筒
１４撹拌用モータ
１５サポート
１６覗き窓
２０チャージホッパー
２１チャージフィーダ
２２遮断弁
２３計量用ホッパー
２４ロードセル
２５計量フィーダ
Ａ空気層
Ｆ粉体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a powder metering device that measures the weight of powder supplied from the powder storage chamber to the outside continuously or intermittently, and in particular, can be accurately metered at low cost, Moreover, the present invention relates to a technology that enables retrofitting to an existing powder supply apparatus.
[0002]
[Prior art]
As shown in FIG. 11, the conventional powder weighing and supplying apparatus includes a load cell 24 for measuring the weight of a hopper that stores powder, attached to a main body of a weighing hopper 23 different from the charge hopper 20. In general, there is a weight reduction formula in which the supply amount is measured as the weight value of the supplied powder, which is a reduced value obtained by subtracting the current weight value from the initial weight value when the powder is discharged (see Patent Document 1).
[0003]
By the way, the above-described configuration is originally a high-cost facility that requires two hoppers for charging and weighing. In addition, if the insufficient amount of powder is charged to the weighing hopper 23 from the charge hopper 20 in parallel with the supply, the measured value changes due to the impact, and the measurement cannot be performed during the charge, and the influence of the charge during the non-measurement. Even if the supply status changed, no abnormality was found. Furthermore, if the capacity of the feeder is increased in order to shorten the charging time, there is a problem that the equipment cost increases.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-323365
[Problems to be solved by the invention]
The problem to be solved by the present invention is to solve these conventional problems, and even while charging the hopper, it is possible to weigh in parallel without being affected by the impact, and there is no separate weighing hopper. It is an object of the present invention to provide a powder metering and feeding device that can be metered at a low cost by a hopper and can be retrofitted to an existing powder feeding device.
[0006]
[Means for Solving the Problems]
The configuration of the present invention that solves this problem is as follows.
1) A casing attached below the discharge port of the powder storage chamber is provided with an opening communicating with the discharge port of the powder storage chamber on the top surface and a discharge port on the bottom surface, and a plurality of blades are provided at predetermined intervals on the outer periphery of the disk. A supply board that protrudes radially is provided to be rotatable at the bottom of the casing, and a sliding plate provided with an inlet is provided so as to cover the rotation trajectory surface of the blade at the upper end height of the blade of the supply board. The space partitioned by the blades and the bottom surface of the casing is a powder space in which a predetermined amount of powder that has fallen from the inlet of the slide plate is stored. In the powder supply device capable of supplying a fixed amount to the measuring hole, a measuring hole is opened at a position through which the powder cut off on the bottom surface of the casing passes, and a measuring surface of the weight measuring instrument is disposed in the measuring hole, Reduce the subsequent thickness including the measurement surface of the scraper A gap is formed at the upper end of the blade, and the weight of the powder passing through the measurement surface is measured so that the amount of powder supplied can be measured based on the weight value and the rotation speed of the supply board. 2) A powder metering and feeding device characterized by the above: A casing mounted below the discharge port of the powder storage chamber is provided with an opening communicating with the discharge port of the powder storage chamber on the top surface and a discharge port on the bottom surface. A supply board having a plurality of blades projecting radially at a predetermined interval on the periphery is provided to be rotatable at the bottom of the casing, and a partition plate having an inlet is provided at the upper end height of the blades of the supply board. Auxiliary supply panel with the same structure as the supply panel is mounted on the partition plate on the partition plate on the partition plate, and a sliding plate equipped with an input port at the position facing the input port of the partition plate is auxiliary supplied The top edge height of the blade of the board is provided so as to cover the rotation locus surface of the blade. Each space partitioned by the blades of the feeder and auxiliary supply panel, the partition plate, and the bottom surface of the casing is a powder space in which a predetermined amount of powder dropped from the inlet of the partition plate and the sliding plate is stored, and auxiliary supply A powder supply device for transferring a predetermined amount of powder cut off by rotation of a plate to a powder space of a lower supply plate so as to be quantitatively supplied from the discharge port to the outside. A measurement hole is opened at a position where the cut powder passes, a measurement surface of a weight measuring device is arranged in the measurement hole , and the blade height of the supply panel is formed higher than the blade of the auxiliary supply panel, An air layer is formed above the powder when the powder cut off by the auxiliary supply board is stored in the powder space of the supply board, and the load from the partition plate is eliminated so that the measurement is not affected. Measure the weight of powder passing through the measurement surface, and the weight value and the number of rotations of the supply panel Based the supply amount of the powder was stretched sealing member film-shaped between the metering bore and the weight measuring device of the measuring surface of the powder metering device 3) casing, characterized in that to allow weighing, The powder metering device according to 1) or 2) described above, wherein powder is prevented from leaking from the metering hole .
[0007]
[Action]
According to the present invention, since the measurement hole is opened in a lower part of the casing of the powder supply device and the measurement surface of the weight measuring device is disposed in the measurement hole, the supplied powder is directly placed on the measurement surface. The weight of the powder alone is measured continuously or intermittently. Therefore, since the weight including the hopper is not measured as in the past, it is possible to measure with one hopper without the need for a separate hopper, and charging is performed unless the impact of the charge propagates directly from the hopper to the powder feeder. Can also be weighed. Moreover, since it has a simple structure in which a lower part of the casing is opened, it can be easily retrofitted without requiring a large-scale construction on an existing powder supply apparatus, and can be carried out at a low cost.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, when a film-like sealing member such as a diaphragm is stretched between the measurement hole of the casing and the measurement surface of the weight measuring device, the powder can be prevented from leaking from the measurement hole and accurate measurement can be performed. As the measuring means, there is provided a controller having a program or a circuit for measuring the weight of the powder passing through the measurement surface and calculating the supply amount of the powder based on the weight value and the rotation speed of the supply board.
[0009]
A partition plate with a slot is provided to cover the rotation trajectory surface of the blade at the top edge of the blade of the supply panel, and an auxiliary supply panel with the same structure as the supply panel is mounted on the rotation axis of the supply panel on the partition plate If a sliding plate provided with an inlet at a position opposite to the inlet of the partition plate is provided so as to cover the rotation trajectory surface of the blade at the upper end height of the blade of the auxiliary feeder, The fixed volume of powder that has been scraped is transferred to the powder space of the lower supply board and stably supplied quantitatively from the discharge port to the outside. When the height of the blades of this supply board is formed higher than the blades of the auxiliary supply board, an air layer is formed above the powder when the powder cut off by the auxiliary supply board is stored in the powder space of the supply board, The load from the partition plate can be eliminated so as not to affect the weighing.
[0010]
The supply plate generally has a structure in which a plurality of blades project radially from the outer periphery of the disk at a predetermined interval, and the space defined by the blades of the supply plate, the inner wall surface and the bottom surface of the casing is a powder space. As a matter of course, it is also possible to employ a structure in which a ring is further attached to the outer periphery of the supply board, and the space partitioned by the blade of the supply board, the inner wall surface of the ring and the bottom surface of the casing is used as the powder space. In addition, when a plurality of outlets are provided in the lower part of a powder storage chamber such as a large stirring cylinder, and the powder metering / feeding device of the present invention is attached to each outlet, the powder can be measured independently and simultaneously in multiple directions. Can supply. Embodiments of the present invention will be specifically described below with reference to the drawings.
[0011]
【Example】
Example 1 (see FIGS. 1 to 4): Example 1 shown in FIGS. 1 to 4 is an example in which a one-stage supply board is provided. FIG. 1 is a partial cross-sectional explanatory view of the powder metering and supplying apparatus of the first embodiment, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, FIG. 3 is an explanatory diagram illustrating powder weighing of the first embodiment, and FIG. It is AA sectional drawing of 2.
[0012]
In the figure, 1 is a powder metering device, 2 is a casing, 2a is an opening, 2b is a discharge port, 2c is a sliding plate, 2d is a loading port, 2e is a metering hole, 2f is a mounting jig, and 3 is a deceleration. Motor with machine, 3a is rotating shaft, 4 is supply board, 4a is blade, 4b is powder space, 4c is V ring, 6 is stirring body, 7 is diaphragm, 8 is load cell, 8a is weighing platform, 8b is pressure receiving A plate, 8c is a bolt, 9 is an inverter, 10 is a controller, 11 is a hopper, 11a is a discharge port, 12 is a chute, A is an air layer, and F is powder.
[0013]
As shown in FIGS. 1 and 2, a powder metering / supplying apparatus 1 according to the first embodiment has a casing 2 in which a discharge port 11a of a hopper 11, which is a powder storage chamber, has an opening 2a on the top surface and a discharge port 2b on the bottom surface. A motor 3 with a speed reducer is attached to the lower part of the casing 2 and its rotating shaft 3a is vertically disposed in the casing 2, and a plurality of blades 4a are radially projected on the outer peripheral edge of the rotating shaft 3a. The supply board 4 is pivotally attached to the bottom of the casing 2, the conical stirring body 6 is axially attached to the upper part of the supply board 4, and the half-ring-shaped sliding plate 2 c is attached to the inner wall of the casing 2 at the upper end of the blade 4 a of the supply board 4. The inlet 2d is formed so as to cover the rotation locus surface of the blade 4a at a height. As shown in FIG. 4, the scraping plate 2c is made thinner after that, including the portion of the measurement surface, so that a gap is formed at the upper end of the blade 4a.
[0014]
A measuring hole 2e is opened in the middle of the rotation trajectory of the blade 4a on the bottom surface of the casing 2, and the measuring hole 2e is formed on the surface of the weighing platform 8a of the load cell 8, which is a weight measuring device suspended from the outer edge of the lower surface of the casing 2, as shown in FIG. The pressure receiving plate 8b is mounted with a bolt 8c through a diaphragm 7 having a larger opening area, and the diaphragm 7 protruding on the outer periphery of the weighing platform 8a is stretched so as to be sealed in the measuring hole 2e with a mounting jig 2f. . The controller 10 includes a control circuit that controls the motor 3 with a speed reducer, and an arithmetic circuit that calculates the supply amount of the powder F based on the rotational speed signal of the rotary shaft 3a and the measurement signal (weight value) of the load cell 8. Yes.
[0015]
In the first embodiment, the powder F stored in the hopper 11 by the rotation of the supply board 4 and the stirring body 6 by the driving force of the motor 3 with a speed reducer is taken into the opening 2a of the casing 2 from the discharge port 11a and stirred. The powder F fed to the lower inlet 2d while being stirred by the body 6 is sent to each powder divided by the side surface of each blade 4a adjacent to the outer peripheral wall surface of the supply board 4 and the side wall surface and bottom surface of the casing 2. The powder F stored in the body space 4b is dropped and stored in each powder space 4b by the rotation of the supply board 4, and is sequentially cut by the slide plate 2c to fill the volume of the powder space 4b. It is transferred in the circumferential direction.
[0016]
The powder F accommodated in each powder space 4b passes on the pressure receiving plate 8b of the load cell 8 during the transfer in the circumferential direction as shown in FIG. At this time, as shown in FIG. 4, since the air layer A is formed below the thinned sliding plate 2c, the air pressure on the pressure receiving plate 8b is affected by pressure equalization with the discharge port 2b side or the outside during measurement. It is prevented and measured accurately. The weight of the powder F temporarily placed on the pressure receiving plate 8b is measured continuously or intermittently by the load cell 8, and the controller 10 rotates the weight value measured by the load cell 8 and the rotation axis 3a per unit time. The supply amount of the powder F is calculated by the number and measured. The powder F is then discharged from the discharge port 2b and supplied to a predetermined place by the chute 12.
[0017]
Since Example 1 is configured as described above, the supplied powder F is directly placed on the measurement surface, and the weight of only the powder F is measured continuously or intermittently. Therefore, since the weight including the hopper is not measured as in the past, it is possible to measure with one hopper without requiring a separate hopper for weighing, and the charge impact does not directly propagate to the powder supply device, so even during charging Weighing is now possible. Further, since the measurement surface is arranged in the measuring hole 2e formed in the lower part of the casing 2, the existing powder supply apparatus can be easily retrofitted without requiring a large-scale construction, Can be implemented at cost.
[0018]
Example 2 (see FIGS. 5 to 8): Example 2 shown in FIGS. 5 to 8 is an example in which a supply board is provided in two upper and lower stages. FIG. 5 is a partial cross-sectional explanatory view of the powder metering and supplying apparatus of the second embodiment, FIG. 6 is a cross-sectional view along the AA line in FIG. 5, FIG. 7 is a cross-sectional view along the BB line in FIG. It is explanatory drawing which shows powder cutting. In the figure, 2g is a partition plate, 2h is an inlet, 5 is an auxiliary supply board, 5a is a blade, and 5b is a powder space.
[0019]
As shown in FIGS. 5 to 7, the powder metering and supply device 1 of the second embodiment has auxiliary supply plates 5 each having a plurality of blades 5 a radially projecting from the outer periphery on the same axis above the supply plate 4. , 5a are attached so that the vertical positions thereof are aligned with each other, and a semi-circular slide plate 2c is attached so as to cover the rotation trajectory surface of the blade 5a at the upper end height of the blade 5a of the auxiliary supply board 5 to form the inlet 2d. A half-ring-shaped partition plate 2g is attached between the auxiliary supply board 5 and the supply board 4 so as to cover the rotation trajectory surface of the blade 4a in the opposite direction to the slide-off plate 2c, thereby forming the insertion port 2h. The height of the blade 4 a of the supply board 4 is 10% higher than that of the blade 5 a of the auxiliary supply board 5.
[0020]
In Example 2, the powder F sent to the charging port 2d is divided into powder spaces partitioned by the side surfaces of the blades 4a adjacent to the outer peripheral wall surface of the auxiliary supply board 5, the side wall surface of the casing 2, and the upper surface of the partition plate 2g. After being dropped and housed in 5b, the powder F housed in each powder space 5b by the rotation of the auxiliary supply board 5 is sequentially cut by the slide plate 2c to fill almost the volume of the powder space 5b. In this state, it is transferred in the circumferential direction. Next, the powder F accommodated in each powder space 5 b is dropped and accommodated in order in each powder space 4 b of the supply plate 4 directly below through the inlet 2 h, and each powder space is rotated by the rotation of the supply plate 4. The powder F falling on 4b is transferred to the load cell 8 side along the circumferential direction.
[0021]
At this time, as shown in FIGS. 8A and 8B, the height H ₂ of the blade 4a is formed higher than the height H _{1 of the} blade 5a, so that the volume of the powder space 4b is the powder space 5b. It is getting bigger. Therefore, since the air layer A is formed on the powder F when the powder F cut off on the upper side is accommodated in the lower powder space 4b, the load pressure of the partition plate 2g is relieved by the air layer. Therefore, the pressure fluctuation is suppressed so that the subsequent weighing is not affected. Further, by performing the scraping twice, the powder pressure of the powder F introduced from the discharge port 11a of the hopper 11 is relieved to suppress the impact, and the measurement can be performed accurately. Other reference numerals and configurations are the same as those in the first embodiment.
[0022]
Example 3 (see FIGS. 9 and 10): Example 3 shown in FIGS. 9 and 10 is a powder in which a plurality of powder metering and supply devices of Example 1 are attached to a stirring cylinder so that powder can be supplied in multiple directions. It is an example of body supply equipment. FIG. 9 is a plan view of the powder supply facility of the third embodiment, and FIG. 10 is a partially omitted side view of the powder supply facility of the third embodiment. In the figure, 13 is a stirring cylinder, 14 is a stirring motor, 15 is a support, and 16 is a viewing window.
[0023]
In Example 3, as shown in FIGS. 9 and 10, three unillustrated outlets are formed on the lower surface of the agitating cylinder 13 containing an agitating body (not shown) that is rotated by the agitating motor 14, and a powder is formed in each outlet. The body weighing supply device 1 is attached so that the opening 2a of the casing 2 communicates with the discharge port to constitute a powder supply facility, and the powder F discharged from each discharge port of the stirring tube 13 is each powder. The body weighing supply device 1 is capable of simultaneous feeding in multiple directions while weighing each independently. Other reference numerals, configurations, and operations are the same as those in the first embodiment.
[0024]
【The invention's effect】
As described above, according to the present invention, the powder can be measured in parallel without being affected by the impact during charging, and it can be measured at a low cost without requiring a separate hopper for measurement. It is possible to provide a powder metering supply device that can be retrofitted to the supply device.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional explanatory view of a powder weighing and supplying apparatus according to a first embodiment.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
FIG. 3 is an explanatory diagram showing powder weighing in an example.
4 is a cross-sectional view taken along the line AA in FIG.
FIG. 5 is a partial cross-sectional explanatory view of a powder metering device of Example 2.
6 is a cross-sectional view taken along the line AA in FIG.
7 is a cross-sectional view taken along the line BB in FIG.
FIG. 8 is an explanatory view showing powder cutting of Example 2.
9 is a plan view of a powder supply facility of Example 3. FIG.
10 is a partially omitted side view of the powder supply facility of Example 3. FIG.
FIG. 11 is an explanatory diagram of a conventional powder weighing and supplying apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Powder metering supply apparatus 2 Casing 2a Opening part 2b Discharge port 2c Sliding plate 2d Slot 2e Metering hole 2f Mounting jig 2g Partition plate 2h Slot 3 Motor 3a with speed reducer 4 Rotating shaft 4 Feeding board 4a Blade 4b Powder Space 4c V ring 5 Auxiliary supply panel 5a Blade 5b Powder space 6 Stirrer 7 Diaphragm 8 Load cell 8a Scale stand 8b Pressure receiving plate 8c Bolt 9 Inverter 10 Controller 11 Hopper 11a Discharge port 12 Chute 13 Stirring cylinder 14 Stirring motor 15 Support 16 Viewing window 20 Charge hopper 21 Charge feeder 22 Shut-off valve 23 Weighing hopper 24 Load cell 25 Weighing feeder A Air layer F Powder

Claims

A casing attached below the discharge port of the powder storage chamber is provided with an opening communicating with the discharge port of the powder storage chamber on the top surface and a discharge port on the bottom surface, and a plurality of blades are radially arranged at predetermined intervals on the outer periphery of the disk. A protruding supply board is provided to be rotatable at the bottom of the casing, and a sliding plate provided with an inlet is provided so as to cover the rotation trajectory surface of the blade at the upper end height of the blade of the supply board. The space partitioned by the bottom of the casing is used as a powder space that contains a predetermined amount of powder that has fallen from the slot opening, and the amount of powder that has been scraped off by the rotation of the supply board is determined from the outlet to the outside. In the powder supply apparatus configured to be able to supply, a measuring hole is opened at a position through which the powder cut off on the bottom surface of the casing passes, and a measuring surface of the weight measuring device is disposed in the measuring hole, and further, Decrease the thickness after that including the measurement surface part of the plate, and feathers As voids are formed in the upper end, that it has to be able to weigh the supplied amount of the powder on the basis of the rotational speed of the feed plate and the weight value by measuring the weight of the powder passing through the measurement plane A powder metering / feeding device.

A casing attached below the discharge port of the powder storage chamber is provided with an opening communicating with the discharge port of the powder storage chamber on the top surface and a discharge port on the bottom surface, and a plurality of blades are radially arranged at predetermined intervals on the outer periphery of the disk. A protruding supply board is provided to be rotatable at the bottom of the casing, and a partition plate having an inlet is provided to cover the rotation trajectory surface of the blade at the upper end height of the blade of the supply board, and has the same structure as the supply board. Auxiliary supply panel is mounted on the partition plate on the rotation axis of the supply panel, and the blade is rotated at the upper end height of the blade of the auxiliary supply panel. Provided to cover the trajectory surface, a predetermined amount of powder that has fallen from the inlet of the partition plate and sliding plate is stored in each space partitioned by the blades of the supply plate and auxiliary supply plate, the partition plate, and the bottom surface of the casing. A predetermined powder space that has been scraped off by rotation of the auxiliary supply board Is a powder supply device capable of transferring a fixed amount of powder to a powder space of a lower supply board and supplying a constant amount from the discharge port to the outside, at a position through which the powder cut off on the bottom surface of the casing passes. Powder that has been opened by a metering hole, the measuring surface of the weight measuring instrument is placed in the metering hole , and the blade height of the supply panel is higher than the blade of the auxiliary supply panel. When the powder is stored in the powder space of the supply board, an air layer is formed above the powder, the load from the partition plate is eliminated so as not to affect the measurement, and the weight of the powder passing through the measurement surface is reduced. A powder metering / feeding device characterized in that a powder feed amount can be measured based on the weight value and the rotation speed of a feeding board.

The powder metering device according to claim 1 or 2, wherein a film-like sealing member is stretched between the measuring hole of the casing and the measuring surface of the weight measuring device so that the powder does not leak from the measuring hole .