JP4393493B2 - Screw feeder - Google Patents

Screw feeder Download PDF

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JP4393493B2
JP4393493B2 JP2006256054A JP2006256054A JP4393493B2 JP 4393493 B2 JP4393493 B2 JP 4393493B2 JP 2006256054 A JP2006256054 A JP 2006256054A JP 2006256054 A JP2006256054 A JP 2006256054A JP 4393493 B2 JP4393493 B2 JP 4393493B2
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damper
granular material
discharge port
cylindrical body
screw
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JP2008074562A (en
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実 岡
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Kamacho Scale Co Ltd
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Description

本発明は、一端側の下側に粉粒体の下向き排出口が設けられ、他端側に粉粒体の供給口が設けられて、その供給口から前記下向き排出口に至る粉粒体の搬送路を形成する横置きの円筒体と、その円筒体内にほぼ同心状に配置されたスクリューを備え、前記搬送路を遮断するダンパーが、前記円筒体の軸心方向に沿って前記下向き排出口の開放側から閉鎖側にかけて移動自在に、かつ、付勢機構により前記閉鎖側に押圧されて設けられ、前記スクリューの回転に伴って前記供給口から供給される粉粒体を前記下向き排出口側へ搬送し、その粉粒体の搬送に伴って前記ダンパーを前記付勢機構の付勢力に抗して開操作して粉粒体を前記下向き排出口から排出させるスクリューフィーダーに関する。   In the present invention, a downward discharge port of the granular material is provided on the lower side of one end side, and a supply port of the granular material is provided on the other end side of the granular material from the supply port to the downward discharge port. A horizontal cylinder that forms a conveyance path, and a screw that is disposed substantially concentrically in the cylinder, and a damper that blocks the conveyance path is provided along the axial direction of the cylindrical body. The powder particles that are provided so as to be movable from the open side to the closed side and that are pressed against the closed side by an urging mechanism and that are supplied from the supply port as the screw rotates are disposed on the downward discharge side. It is related with the screw feeder which opens the said damper against the urging | biasing force of the said urging | biasing mechanism with conveyance of the granular material, and discharges a granular material from the said downward discharge port.

このようなスクリューフィーダーは、各種の産業分野で種々の粉粒体を搬送するのに使用されているが、従来のスクリューフィーダーは、粉粒体の搬送路を遮断するダンパーが中実の円板などで構成され、搬送路を遮断した状態では、搬送路内の粉粒体が漏出しないように完全にシールする構成とされていた（例えば、特許文献１および２参照）。   Such screw feeders are used to transport various powders in various industrial fields, but conventional screw feeders have a solid disk with a damper that blocks the transport path of powders. In a state in which the conveyance path is blocked, the powder particles in the conveyance path are completely sealed so as not to leak out (see, for example, Patent Documents 1 and 2).

実公平６−１０７６３号公報Japanese Utility Model Publication No. 6-10773 特許第３０７２２５２号公報Japanese Patent No. 3072252

従来のスクリューフィーダーでは、取り扱う粉粒体が、例えば、特許文献１のように穀粒であれば問題はないが、例えば、細かい粉粒体で粘着性の高いもの、具体的には、砂糖（グラニュー糖を除く）、粗塩、米ぬかなどは、粘着性が高くて安息角が大きいため、そのような粉粒体を取り扱う場合には問題があった。
すなわち、従来のスクリューフィーダーでは、図６の（ロ）に示すように、スクリュー９の回転が停止して、ダンパー１８Ａが付勢機構２０の付勢力によって下向き排出口１０の閉鎖側Ｂに移動する際、粉粒体Ｐの粘着性が高いと、その粉粒体Ｐが下向き排出口１０から下方へ落下せず、ダンパー１８Ａとスクリュー９先端部との間に詰まることがある。
その場合、詰まりを生じた粉粒体Ｐの下方における一部は、粉粒体Ｐの安息角などに応じて落下することもあり、粉粒体Ｐを正確に計量することができなくなるおそれがある。
さらに、図６の（ロ）に示した状態で、何らかの振動などが作用すると、ダンパー１８Ａとスクリュー９先端部との間に詰まった粉粒体Ｐが、不必要なときに不測に落下することもあり、この点に改良の余地があった。 In the conventional screw feeder, there is no problem if the granular material to be handled is, for example, a grain as in Patent Document 1, but for example, a fine granular material having high adhesiveness, specifically, sugar ( (Excluding granulated sugar), crude salt, rice bran, etc. have a problem when handling such granular materials because of their high tackiness and large angle of repose.
That is, in the conventional screw feeder, as shown in FIG. 6B, the rotation of the screw 9 is stopped, and the damper 18A is moved to the closing side B of the downward discharge port 10 by the biasing force of the biasing mechanism 20. At this time, if the adhesiveness of the granular material P is high, the granular material P may not fall downward from the downward discharge port 10 and may be clogged between the damper 18A and the tip of the screw 9.
In that case, a part of the powder P that is clogged may fall depending on the angle of repose of the powder P, and the powder P may not be accurately measured. is there.
Furthermore, when some vibration or the like acts in the state shown in FIG. 6B, the granular material P clogged between the damper 18A and the tip of the screw 9 may unexpectedly fall when it is unnecessary. There was also room for improvement in this regard.

本発明は、このような従来の欠点に着目したもので、その目的は、たとえ粉粒体が粘着性の高いものであっても、比較的正確な量を確実に供給することのできるスクリューフィーダーを提供することにある。   The present invention focuses on such conventional drawbacks, and its purpose is to provide a screw feeder that can reliably supply a relatively accurate amount even if the powder is highly sticky. Is to provide.

本発明の第１の特徴構成は、一端側の下側に粉粒体の下向き排出口が設けられ、他端側に粉粒体の供給口が設けられて、その供給口から前記下向き排出口に至る粉粒体の搬送路を形成する横置きの円筒体と、その円筒体内にほぼ同心状に配置されたスクリューを備え、前記搬送路を遮断するダンパーが、前記円筒体の軸心方向に沿って前記下向き排出口の開放側から閉鎖側にかけて移動自在に、かつ、付勢機構により前記閉鎖側に押圧されて設けられ、前記スクリューの回転に伴って前記供給口から供給される粉粒体を前記下向き排出口側へ搬送し、その粉粒体の搬送に伴って前記ダンパーを前記付勢機構の付勢力に抗して開操作して粉粒体を前記下向き排出口から排出させるスクリューフィーダーであって、前記ダンパーに粉粒体排出用の横向き排出開口部が開口され、前記ダンパーが前記下向き排出口の閉鎖側に移動するときに前記下向き排出口近傍の粉粒体を前記横向き排出開口部から排出自在に構成してあるところにある。   In the first characteristic configuration of the present invention, a downward discharge port of the granular material is provided on the lower side of the one end side, and a supply port of the granular material is provided on the other end side. A horizontal cylinder that forms a conveying path for the powder and granular material, and a screw that is disposed substantially concentrically within the cylindrical body, and a damper that blocks the conveying path extends in the axial direction of the cylindrical body A granular material that is provided so as to be movable from the open side to the closed side of the downward discharge port and pressed against the closed side by an urging mechanism and is supplied from the supply port as the screw rotates. A screw feeder that causes the damper to open against the urging force of the urging mechanism to discharge the granular material from the downward discharge port in accordance with the conveyance of the granular material And the damper is for discharging powder An opening faces the discharge opening, wherein the damper is in a place which had been freely configured discharged powdery grains of the downward discharge opening neighborhood from the lateral discharge opening when moving to the closed side of the downward outlet.

本発明の第１の特徴構成によれば、粉粒体の搬送路を遮断するダンパーに粉粒体排出用の横向き排出開口部が開口され、ダンパーが下向き排出口の閉鎖側に移動するときに下向き排出口近傍の粉粒体を横向き排出開口部から排出自在に構成してあるので、スクリューの回転が停止して、ダンパーが付勢機構の付勢力によって下向き排出口の閉鎖側に移動する際、たとえ粉粒体の粘着性が高くとも、下向き排出口近傍の粉粒体は横向き排出開口部から排出され、そのため、粉粒体がダンパーとスクリュー先端部との間に詰まることが回避される。
したがって、粉粒体の一部が、図６の（イ）に示すように、その安息角などに応じて横向き排出開口部から落下することになるが、その落下量は、図６の（ロ）に示した従来の落下量よりも少なく、さらに、従来のように、ダンパーとスクリュー先端部との間に詰まった粉粒体が落下するおそれもなく、その結果、たとえ粉粒体が粘着性の高いものであっても、比較的正確な量を確実に供給することができる。 According to the first characteristic configuration of the present invention, when the horizontal discharge opening for discharging the granular material is opened in the damper that blocks the conveying path of the granular material, and the damper moves downward to the closed side of the discharge port. Since the granular material in the vicinity of the downward discharge port can be discharged from the horizontal discharge opening, the rotation of the screw stops and the damper moves to the closed side of the downward discharge port by the biasing force of the biasing mechanism. Even if the granular material has high adhesiveness, the granular material in the vicinity of the downward discharge port is discharged from the horizontal discharge opening, so that the granular material is prevented from clogging between the damper and the screw tip. .
Accordingly, as shown in FIG. 6 (a), a part of the granular material falls from the lateral discharge opening according to the angle of repose, etc. ), And there is no risk that the granular material clogged between the damper and the tip of the screw will fall, as a result, even if the granular material is sticky. A relatively accurate amount can be reliably supplied even if it is high.

本発明の第２の特徴構成は、前記スクリューとほぼ同心状に配置された支持軸が設けられ、その支持軸に前記ダンパーとダンパーに連設の筒状体が外嵌されて、前記ダンパーが前記支持軸に沿って移動自在に構成され、前記筒状体と支持軸の間に入った粉粒体を排出するための貫通孔が前記筒状体に設けられているところにある。   According to a second characteristic configuration of the present invention, a support shaft disposed substantially concentrically with the screw is provided, and the damper and a cylindrical body continuously connected to the damper are externally fitted to the support shaft. The cylindrical body is provided with a through-hole configured to be movable along the support shaft and for discharging the powder particles that have entered between the cylindrical body and the support shaft.

本発明の第２の特徴構成によれば、スクリューとほぼ同心状に配置された支持軸が設けられ、その支持軸にダンパーとダンパーに連設の筒状体が外嵌されて、ダンパーが支持軸に沿って移動自在に構成されているので、ダンパーは支持軸により確実に支持されて、円滑に移動することになり、粉粒体の計量はより一層正確なものとなる。
そして、その筒状体と支持軸の間に入った粉粒体を排出するための貫通孔が筒状体に設けられているので、たとえ筒状体と支持軸の間に粉粒体が入り込んでも、筒状体に設けられた貫通孔から排出されるため、ダンパーは常に円滑に移動することになる。 According to the second characteristic configuration of the present invention, the support shaft disposed substantially concentrically with the screw is provided, and the damper and the cylindrical body continuously connected to the damper are fitted on the support shaft, so that the damper is supported. Since the damper is configured to be movable along the shaft, the damper is reliably supported by the support shaft and moves smoothly, and the measurement of the granular material becomes even more accurate.
Since the cylindrical body is provided with a through-hole for discharging the granular material that has entered between the cylindrical body and the support shaft, the granular material enters between the cylindrical body and the support shaft. However, since it is discharged from the through-hole provided in the cylindrical body, the damper always moves smoothly.

本発明の第３の特徴構成は、前記横向き排出開口部が、前記円筒体の軸心方向視において、前記ダンパーの周方向にほぼ均等に開口された複数の単位開口部で構成されているところにある。   According to a third characteristic configuration of the present invention, the lateral discharge opening is composed of a plurality of unit openings that are substantially uniformly opened in the circumferential direction of the damper in the axial direction of the cylindrical body. It is in.

本発明の第３の特徴構成によれば、横向き排出開口部が、円筒体の軸心方向視において、ダンパーの周方向にほぼ均等に開口された複数の単位開口部で構成されているので、取り扱う粉粒体の粒径や粘着度などに応じて、単位開口部の大きさや数などを適宜設定することによって、粉粒体の種類などにかかわらず、常に安定した計量が可能となる。   According to the third characteristic configuration of the present invention, the lateral discharge opening is configured with a plurality of unit openings that are opened substantially uniformly in the circumferential direction of the damper in the axial direction of the cylindrical body. By appropriately setting the size and number of unit openings in accordance with the particle size and adhesiveness of the granular material to be handled, stable measurement can always be performed regardless of the type of the granular material.

本発明によるスクリューフィーダーの実施の形態を図面に基づいて説明する。
スクリューフィーダーは、例えば、化学、食品、鉄鋼、飼料などの各種の産業分野において、複数の粉粒体を計量しながら配合する計量配合システムなどに使用されるもので、計量配合システムは、図１および図２に示すように、中央に集合シュート１を備え、集合シート１の周りに粉粒体を収容するホッパー２が複数個、この実施形態では、７個のホッパー２が配置され、各ホッパー２には、ホッパー２内の粉粒体Ｐを切り出して集合シュート１にまで搬送するスクリューフィーダー３がそれぞれ設けられている。
なお、詳しい説明は省略するが、集合シュート１の下方には、荷重検出装置４や計量ホッパー５などの各種機器類が配設されている。 An embodiment of a screw feeder according to the present invention will be described with reference to the drawings.
The screw feeder is used in, for example, a metering and blending system for blending while measuring a plurality of powder particles in various industrial fields such as chemistry, food, steel, and feed. As shown in FIG. 2, a plurality of hoppers 2 each having a collecting chute 1 in the center and containing powder particles around the collecting sheet 1, in this embodiment, seven hoppers 2 are arranged, and each hopper 2 are provided with screw feeders 3 for cutting out the granular material P in the hopper 2 and conveying it to the collecting chute 1.
Although not described in detail, various devices such as a load detection device 4 and a weighing hopper 5 are disposed below the collective chute 1.

各スクリューフィーダー３は、図３に示すように、一端部が円錐形状の閉鎖部材６により閉鎖され、他端部がホッパー２の底部に連設された供給部材７に取り付けられた横置きの円筒体８と、その円筒体８内に円筒体８の軸心Ｌとほぼ同心状に配置されたスクリュー９を備えている。
横置きの円筒体８の内部空間は、ホッパー２内の粉粒体Ｐを集合シュート１にまで搬送する搬送路に形成され、円筒体８の一端側、つまり、閉鎖部材６側は、その下側周面が開口されて粉粒体Ｐを集合シュート１内へ排出する下向き排出口１０に構成され、円筒体８の他端側、つまり、ホッパー２側には、供給部材７に設けられた供給口１１が位置していて、その供給口１１からホッパー２内の粉粒体Ｐが円筒体８内に供給されるように構成されている。 As shown in FIG. 3, each screw feeder 3 has a horizontal cylinder in which one end is closed by a conical closing member 6 and the other end is attached to a supply member 7 connected to the bottom of the hopper 2. A body 8 and a screw 9 disposed in the cylindrical body 8 substantially concentrically with the axis L of the cylindrical body 8 are provided.
The internal space of the horizontal cylinder 8 is formed in a conveyance path that conveys the granular material P in the hopper 2 to the collecting chute 1, and one end side of the cylinder 8, that is, the closing member 6 side is below it. The side peripheral surface is opened and is configured as a downward discharge port 10 that discharges the granular material P into the collecting chute 1, and is provided on the supply member 7 on the other end side of the cylindrical body 8, that is, on the hopper 2 side. The supply port 11 is located, and the granular material P in the hopper 2 is supplied from the supply port 11 into the cylindrical body 8.

スクリュー９は、図４から明らかなように、大径軸部１２ａと小径軸部１２ｂを有するスクリュー軸１２を備え、そのスクリュー軸１２の大径軸部１２ａの周りにスクリュー刃１３が配設されて構成されている。
スクリュー軸１２の大径軸部１２ａ側の端部は、ベアリング１４により回転自在に保持されたカップリング１５を介して電動モータ１６に連動連結され、スクリュー軸１２の小径軸部１２ｂ側の端部は、閉鎖部材６に穿設された段付き穴６ａ内に挿入され、スリーブベアリング１７を介して閉鎖部材６に回転自在に保持されている。
すなわち、スクリュー軸１２は、その両端部がベアリング１４とスリーブベアリング１７により回転自在に保持され、スクリュー刃１３を有する大径軸部１２ａが、供給部材７に設けられた供給口１１を横切って下向き排出口１０の端部近くにまで配設されている。 As is apparent from FIG. 4, the screw 9 includes a screw shaft 12 having a large diameter shaft portion 12 a and a small diameter shaft portion 12 b, and a screw blade 13 is disposed around the large diameter shaft portion 12 a of the screw shaft 12. Configured.
The end of the screw shaft 12 on the large-diameter shaft portion 12a side is interlocked with the electric motor 16 via a coupling 15 that is rotatably held by a bearing 14, and the end portion of the screw shaft 12 on the small-diameter shaft portion 12b side. Is inserted into a stepped hole 6 a drilled in the closing member 6, and is rotatably held by the closing member 6 via a sleeve bearing 17.
That is, both ends of the screw shaft 12 are rotatably held by the bearing 14 and the sleeve bearing 17, and the large-diameter shaft portion 12 a having the screw blades 13 is directed downward across the supply port 11 provided in the supply member 7. It is disposed up to the vicinity of the end of the discharge port 10.

スクリュー軸１２の小径軸部１２ｂは、円筒体８内部の搬送路を遮断するダンパー１８を支持する支持軸として機能するもので、ダンパー１８とダンパー１８に連設の筒状体１９が、その支持軸としての小径軸部１２ｂに移動自在に外嵌されている。
つまり、ダンパー１８は、図５の（イ）、（ロ）に示すように、円筒体８の軸心Ｌ方向視において、全体が円形に構成され、その中心に小径軸部１２ｂに外嵌する中心孔１８ａが設けられ、ダンパー１８と筒状体１９が小径軸部１２ｂに外嵌され、小径軸部１２ｂに沿って、換言すると、円筒体８の軸心Ｌ方向に沿って移動自在に設けられ、筒状体１９のうち、ダンパー１８に近い部位には、ダンパー１８の中心孔１８ａを通って筒状体１９と小径軸部１２ｂの間に入った粉粒体Ｐを外部へ排出するための貫通孔１９ａが設けられている。
そして、筒状体１９の端部は、閉鎖部材６の段付き穴６ａ内に移動自在に内嵌され、段付き穴６ａの段部と筒状体１９の端縁との間に介装された付勢機構としてのコイルスプリング２０により、ダンパー１８が下向き排出口１０を閉鎖する側に押圧されている。 The small-diameter shaft portion 12b of the screw shaft 12 functions as a support shaft that supports the damper 18 that blocks the conveyance path inside the cylindrical body 8. The damper 18 and the cylindrical body 19 connected to the damper 18 are supported by the damper 18 and the damper 18. A small-diameter shaft portion 12b as a shaft is externally fitted so as to be movable.
In other words, as shown in FIGS. 5A and 5B, the damper 18 is formed in a circular shape as a whole when viewed in the axial center L direction of the cylindrical body 8, and is externally fitted to the small-diameter shaft portion 12b at the center thereof. A center hole 18a is provided, and the damper 18 and the cylindrical body 19 are externally fitted to the small diameter shaft portion 12b, and are provided movably along the small diameter shaft portion 12b, in other words, along the axis L direction of the cylindrical body 8. In order to discharge the granular material P that has entered the space between the cylindrical body 19 and the small-diameter shaft portion 12b through the center hole 18a of the damper 18 to a portion of the cylindrical body 19 close to the damper 18. Through-holes 19a are provided.
The end of the cylindrical body 19 is movably fitted in the stepped hole 6 a of the closing member 6, and is interposed between the step of the stepped hole 6 a and the edge of the cylindrical body 19. The damper 18 is pressed to the side of closing the discharge port 10 downward by a coil spring 20 as a biasing mechanism.

すなわち、ダンパー１８の中心孔１８ａは、スクリュー軸１２の小径軸部１２ｂよりも大径で大径軸部１２ａよりも小径に形成され、ダンパー１８が、コイルスプリング２０により押圧されて、小径軸部１２ｂと大径軸部１２ａとの段部１２ｃに当接するように構成されている。その結果、ダンパー１８は、図４に示すように、円筒体８の軸心Ｌ方向に沿って下向き排出口１０を開放する開放側Ａから閉鎖側Ｂにかけて移動自在に構成され、さらに、コイルスプリング２０により閉鎖側Ｂに押圧されている。
そして、そのダンパー１８には、図５の（ロ）に示すように、円筒体７の軸心Ｌ方向視において、中心孔１８ａ外側の周方向にほぼ均等に開口された複数の単位開口部２１ａ、この実施形態では、６個の単位開口部２１ａが設けられ、その６個の単位開口部２１ａによって、ダンパー１８が下向き排出口１０の閉鎖側Ｂに移動するときに下向き排出口１０近傍の粉粒体Ｐを排出自在とする横向き排出開口部２１に構成されている。 That is, the center hole 18a of the damper 18 is formed to have a diameter larger than that of the small-diameter shaft portion 12b of the screw shaft 12 and smaller than that of the large-diameter shaft portion 12a, and the damper 18 is pressed by the coil spring 20 so It is comprised so that it may contact | abut to the step part 12c of 12b and the large diameter shaft part 12a. As a result, as shown in FIG. 4, the damper 18 is configured to be movable from the open side A that opens the downward discharge port 10 to the closed side B along the axial center L direction of the cylindrical body 8. 20 is pressed to the closing side B.
As shown in FIG. 5B, the damper 18 has a plurality of unit openings 21a that are substantially evenly opened in the circumferential direction outside the center hole 18a in the axial center L direction of the cylindrical body 7. In this embodiment, six unit openings 21a are provided, and when the damper 18 moves to the closing side B of the downward discharge port 10 by the six unit openings 21a, the powder near the downward discharge port 10 It is comprised in the horizontal discharge | emission opening part 21 which makes the particle | grains P discharge freely.

以上のようなスクリューフィーダー３を備えた計量配合システムは、その作動が全てコンピュータにより制御され、各ホッパー２に収納された各種の粉粒体Ｐが、それぞれスクリューフィーダー３により予め決められた量だけ切り出され、集合シュート１に供給されて混合される。
その際、各スクリューフィーダー３においては、電動モータ１６によりスクリュー９が回転駆動され、そのスクリュー９の回転に伴って、供給口１１から円筒体８内に供給された粉粒体Ｐは、円筒体８内の搬送路に沿って下向き排出口１０側へと搬送される。その粉粒体Ｐの搬送に伴って、ダンパー１８は、コイルスプリング２０の付勢力に抗して下向き排出口１０の開放側Ａへ押圧されて開操作され、その開操作された下向き排出口１０から集合シュート１内へ排出される。 The operation of the metering and blending system including the screw feeder 3 as described above is all controlled by a computer, and various types of powder particles P stored in each hopper 2 are each in a predetermined amount by the screw feeder 3. It is cut out, supplied to the collecting chute 1 and mixed.
At that time, in each screw feeder 3, the screw 9 is rotationally driven by the electric motor 16, and the powder P supplied from the supply port 11 into the cylindrical body 8 as the screw 9 rotates is a cylindrical body. 8 is transported downward along the transport path 8 toward the discharge port 10. Along with the conveyance of the granular material P, the damper 18 is pressed against the opening side A of the downward discharge port 10 against the urging force of the coil spring 20 to be opened, and the opened downward discharge port 10 thus opened. Are discharged into the collecting chute 1.

そして、スクリュー９の回転停止に伴ってダンパー１８への押圧力が解除されると、ダンパー１８は、コイルスプリング２０の付勢力により下向き排出口１０の閉鎖側Ｂへ移動操作される。
その際、ダンパー１８に複数の単位開口部２１ａからなる横向き排出開口部２１が設けられているので、たとえ粉粒体Ｐの粘着性が高くとも、下向き排出口１０近傍の粉粒体Ｐは横向き排出開口部２１から排出される。
したがって、図６の（イ）に示すように、粉粒体Ｐの一部がその安息角などに応じて各単位開口部２１ａから落下することになるが、粉粒体Ｐがダンパー１８とスクリュー９先端部との間に詰まることはなく、比較的正確な量を確実に供給することができる。 When the pressing force to the damper 18 is released along with the rotation stop of the screw 9, the damper 18 is moved to the closing side B of the downward discharge port 10 by the urging force of the coil spring 20.
At that time, since the damper 18 is provided with the lateral discharge opening 21 composed of a plurality of unit openings 21a, the powder P in the vicinity of the downward discharge port 10 is horizontal even if the powder P has high adhesiveness. It is discharged from the discharge opening 21.
Accordingly, as shown in FIG. 6A, a part of the granular material P falls from each unit opening 21a depending on the angle of repose, etc., but the granular material P is made of the damper 18 and the screw. No clogging between the 9 tip portions and a relatively accurate amount can be reliably supplied.

〔別実施形態〕
（１）先の実施形態では、ダンパー１８の周方向にほぼ均等に６個の単位開口部２１ａを設けて横向き排出開口部２１を構成した例を示したが、横向き排出開口部２１を構成する単位開口部２１ａの個数や形状などは任意である。
例えば、ダンパー１８の周方向に円形の単位開口部２１ａを複数個設けたり、円形または多角形の単位開口部２１ａをひとつだけ設けることもでき、要するに、取り扱う粉粒体Ｐの性状に応じて最適な大きさ、個数、形状などを選択して実施することになる。
筒状体１９に設ける貫通孔１９ａについても同様で、その大きさ、個数、形状などは、取り扱う粉粒体Ｐの性状に応じて選択することになる。 [Another embodiment]
(1) In the previous embodiment, an example in which six unit openings 21 a are provided in the circumferential direction of the damper 18 so as to form the lateral discharge openings 21 is shown. However, the lateral discharge openings 21 are configured. The number and shape of the unit openings 21a are arbitrary.
For example, a plurality of circular unit openings 21a can be provided in the circumferential direction of the damper 18, or only one circular or polygonal unit opening 21a can be provided. In short, it is optimal according to the properties of the powder P to be handled. The size, number, shape, etc. are selected and implemented.
The same applies to the through-holes 19a provided in the cylindrical body 19, and the size, number, shape, and the like thereof are selected according to the properties of the granular material P to be handled.

（２）先の実施形態では、スクリューフィーダー３を構成する横置きの円筒体８をホッパー２の底部に連設の供給部材７に取り付けた例を示したが、供給部材７をなくして、横置きの円筒体８をホッパー２の底部にまで延設し、その横置きの円筒体８の上側周面に供給口１１を直接設けて実施することもできる。
また、スクリュー軸１２を大径軸部１２ａと小径軸部１２ｂにより構成し、その小径軸部１２ｂをダンパー１８の支持軸として機能するように構成した例を示したが、スクリュー軸と支持軸をそれぞれ別の軸により構成することもでき、その場合、支持軸を回転不能な固定の軸で構成することもできる。 (2) In the previous embodiment, the horizontal cylindrical body 8 constituting the screw feeder 3 has been shown attached to the supply member 7 connected to the bottom of the hopper 2. It is also possible to extend the cylindrical body 8 to the bottom of the hopper 2 and directly provide the supply port 11 on the upper peripheral surface of the horizontal cylindrical body 8.
Moreover, although the screw shaft 12 was comprised by the large diameter shaft part 12a and the small diameter shaft part 12b, and the small diameter shaft part 12b was comprised so that it might function as a support shaft of the damper 18, the screw shaft and the support shaft were shown. Each of the support shafts can be configured by a separate shaft, and in this case, the support shaft can be configured by a fixed shaft that cannot be rotated.

（３）先の実施形態では、スクリューフィーダー３を計量配合システムに使用した例を示したが、スクリューフィーダー３の使用は、特に計量配合システムに限るものではなく、各種の産業分野において種々の装置と組み合わせて実施することができ、当然、取り扱う粉粒体Ｐについても任意である。 (3) In the previous embodiment, the example in which the screw feeder 3 is used in the metering and blending system has been shown. However, the use of the screw feeder 3 is not limited to the metering and blending system, and various devices in various industrial fields. Of course, it is arbitrary also about the granular material P to handle.

計量配合システムの正面図Front view of weighing and blending system 計量配合システムの平面図Top view of the weighing system スクリューフィーダーの断面図Cross section of screw feeder スクリューフィーダーの要部断面図Cross section of the main part of the screw feeder スクリューフィーダーのダンパーの断面図と正面図Cross section and front view of damper of screw feeder 本発明のダンパーと従来のダンパーとの作用を示す要部断面図Sectional drawing which shows the operation of the damper of the present invention and the conventional damper

符号の説明Explanation of symbols

３ スクリューフィーダー
８ 円筒体
９ スクリュー
１０ 下向き排出口
１１ 供給口
１２ｂ 支持軸
１８ ダンパー
１９ 筒状体
１９ａ 貫通孔
２０ 付勢機構
２１ 横向き排出開口部
２１ａ 単位開口部
Ａ 下向き排出口の開放側
Ｂ 下向き排出口の閉鎖側
Ｌ 円筒体の軸心
Ｐ 粉粒体 DESCRIPTION OF SYMBOLS 3 Screw feeder 8 Cylindrical body 9 Screw 10 Downward discharge port 11 Supply port 12b Support shaft 18 Damper 19 Cylindrical body 19a Through-hole 20 Energizing mechanism 21 Lateral discharge opening 21a Unit opening A Open side of downward discharge port B Downward discharge Closed side of outlet L Center axis of cylindrical body P Granule

Claims (3)

一端側の下側に粉粒体の下向き排出口が設けられ、他端側に粉粒体の供給口が設けられて、その供給口から前記下向き排出口に至る粉粒体の搬送路を形成する横置きの円筒体と、その円筒体内にほぼ同心状に配置されたスクリューを備え、前記搬送路を遮断するダンパーが、前記円筒体の軸心方向に沿って前記下向き排出口の開放側から閉鎖側にかけて移動自在に、かつ、付勢機構により前記閉鎖側に押圧されて設けられ、前記スクリューの回転に伴って前記供給口から供給される粉粒体を前記下向き排出口側へ搬送し、その粉粒体の搬送に伴って前記ダンパーを前記付勢機構の付勢力に抗して開操作して粉粒体を前記下向き排出口から排出させるスクリューフィーダーであって、
前記ダンパーに粉粒体排出用の横向き排出開口部が開口され、前記ダンパーが前記下向き排出口の閉鎖側に移動するときに前記下向き排出口近傍の粉粒体を前記横向き排出開口部から排出自在に構成してあるスクリューフィーダー。 A downward discharge port of the granular material is provided on the lower side of one end side, and a supply port of the granular material is provided on the other end side to form a conveyance path for the granular material from the supply port to the downward discharge port. And a damper that is disposed substantially concentrically within the cylinder, and a damper that blocks the conveyance path is provided along the axial direction of the cylinder from the open side of the downward discharge port. It is movable toward the closing side and is pressed against the closing side by an urging mechanism, and conveys the granular material supplied from the supply port with the rotation of the screw to the downward discharge port side, A screw feeder that opens the damper against the urging force of the urging mechanism along with the conveyance of the granular material and discharges the granular material from the downward discharge port,
The damper is provided with a lateral discharge opening for discharging the granular material, and when the damper moves to the closed side of the downward discharge port, the granular material in the vicinity of the downward discharge port can be discharged from the horizontal discharge opening. Screw feeder configured in 前記スクリューとほぼ同心状に配置された支持軸が設けられ、その支持軸に前記ダンパーとダンパーに連設の筒状体が外嵌されて、前記ダンパーが前記支持軸に沿って移動自在に構成され、前記筒状体と支持軸の間に入った粉粒体を排出するための貫通孔が前記筒状体に設けられている請求項１に記載のスクリューフィーダー。   A support shaft arranged substantially concentrically with the screw is provided, and the damper and a cylindrical body connected to the damper are externally fitted to the support shaft so that the damper is movable along the support shaft. The screw feeder according to claim 1, wherein a through-hole for discharging the granular material that has entered between the cylindrical body and the support shaft is provided in the cylindrical body. 前記横向き排出開口部が、前記円筒体の軸心方向視において、前記ダンパーの周方向にほぼ均等に開口された複数の単位開口部で構成されている請求項１または２に記載のスクリューフィーダー。   3. The screw feeder according to claim 1, wherein the lateral discharge opening is configured by a plurality of unit openings that are opened substantially uniformly in a circumferential direction of the damper when viewed in the axial direction of the cylindrical body.
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