JP2006015240A - Dry-type rice cleaning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dry-type rice cleaning device capable of efficiently removing rice bran remaining on the surface of polishing rice without using water. <P>SOLUTION: This dry-type rice cleaning device is provided with a cylindrical trough 2 having a rice introducing opening 2A, a spindle 4 arranged in the inside along the trough and a driving source 5 for rotating the spindle. Further, the spindle 4 possesses a screw part 4A having spiral blades 41A, 42A for transferring, in a longitudinal direction of the trough 2 the rice to be treated supplied into the trough 2 through the rice introducing opening 2A, and a stirring part 4B pushed out from the screw part and stirring the rice to be treated in the trough 2. The stirring part 4B is constituted by protruding a plurality of stirring pins 43 in the outer peripheral part of the spindle 4, and spiral grooves 43A for removing the bran are formed in the outer peripheral parts of the respective pins 43. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は精米技術に係わり、特に精白米の表面に残存する米糠を除去して研がずに炊ける米（無洗米）を得られるようにした乾式洗米装置に関する。   The present invention relates to a rice milling technique, and more particularly to a dry rice washing apparatus that can remove rice bran remaining on the surface of polished rice to obtain rice that can be cooked without being sharpened (non-washed rice).

一般に、米は玄米を搗いて種皮、外胚乳、膠質層、胚などを剥脱して精白米とし、その精白米を水で研いだ後に炊飯するが、近年では米の研汁による水質汚染などを防止することを目的として、精白米の表面に残存する米糠を予め除去して研がずに炊けるようにした無洗米が普及している。   In general, rice is sprinkled with brown rice to exfoliate the seed coat, outer endosperm, colloidal layer, embryo, etc. to make polished rice. For the purpose of preventing this, non-washed rice has been widely used in which rice bran remaining on the surface of polished rice is removed in advance so that it can be cooked without being sharpened.

尚、精白米を水で研いだものを無洗米として市販している例もあるが、これでは研汁による水質汚染問題を解決できないだけでなく、乾燥処理を必要とするために生産効率が悪化するなどの難点がある。このため、その多くは水を使用せずして米糠の除去を行っている。   In addition, there are cases where milled rice is polished with water as non-washed rice, but this not only solves the problem of water pollution caused by scouring, but also reduces the production efficiency due to the need for drying treatment. There are difficulties such as. For this reason, most of them remove rice bran without using water.

係る装置として、回転ブラシを用いるものが知られるが、回転ブラシを用いるものではブラシをその都度洗浄する必要があるばかりでなく、ブラシの切断屑が被加工米に混入したり、植毛部に被加工米が入り込んで大きな処理ムラを発生するなどの問題がある。   A device using a rotating brush is known as such a device. However, in the case of using a rotating brush, not only the brush needs to be cleaned each time, but also the cutting waste of the brush is mixed into the processed rice or the flocked portion is covered. There is a problem that processed rice enters and causes large processing unevenness.

そこで、回転ブラシを用いず、スクリューコンベヤ内で被加工米を撹拌し、これによって被加工米に付着している糠を除去するという洗米装置が提案されている（例えば、特許文献１）。   Therefore, a rice washing apparatus has been proposed in which the rice to be processed is agitated in a screw conveyor without using a rotating brush, thereby removing slag adhering to the rice to be processed (for example, Patent Document 1).

特開２００１−９６１７４号公報JP 2001-96174 A

然し乍ら、スクリューコンベヤ内で被加工米を撹拌するだけでは、米粒同士が擦り合わされるだけなので除去し得る米糠が不十分となる。よって、特許文献１ではスクリューコンベヤを備えた洗米装置にして、スクリューコンベヤ内に被加工米のみならず、少量の水を供給するようにしている。このため、排出される研汁によって水質汚染を惹起したり、洗米後の乾燥処理に多大なコストや時間を費やしてしまうという欠点がある。又、水の使用によって米本来の風味も損なわれるという問題がある。   However, if the rice to be processed is only stirred in the screw conveyor, the rice grains are rubbed together, so that the rice bran that can be removed becomes insufficient. Therefore, in patent document 1, it is set as the rice washing apparatus provided with the screw conveyor, and not only a to-be-processed rice but a small amount of water is supplied in a screw conveyor. For this reason, there exists a fault that water pollution is caused by the discharged | smoothed soup, and a huge cost and time are spent for the drying process after washing rice. There is also a problem that the original flavor of rice is impaired by the use of water.

本発明は以上のような事情に鑑みて成されたものであり、その目的は水を全く使用せずして米糠を効率よく良好に除去することのできる乾式（無水式）の洗米装置を提供することにある。   The present invention has been made in view of the circumstances as described above, and its purpose is to provide a dry (anhydrous) rice washing apparatus capable of efficiently and satisfactorily removing rice bran without using water at all. There is to do.

本発明は上記目的を達成するため、米導入口を有する筒状のトラフと、該トラフに沿ってその内部に配される主軸と、該主軸を回転させるための駆動源とを具備して成る乾式洗米装置において、前記主軸は前記米導入口よりトラフ内に供給された被加工米をトラフの長さ方向に移送するための螺旋羽根をもつスクリュー部と、該スクリュー部から押し出された被加工米を前記トラフ内で掻き回す撹拌部とを有し、その撹拌部は前記主軸の長さ方向における所定区間内で該主軸の外周部に複数の撹拌ピンを突設して構成され、その各撹拌ピンの外周に除糠用溝が形成されると共に、前記トラフは前記撹拌部を覆う多孔状の除糠筒部を有し、その除糠筒部が外胴により覆われ、前記外胴には吸引装置が接続されることを特徴とする。   In order to achieve the above object, the present invention comprises a cylindrical trough having a rice inlet, a main shaft disposed inside the trough, and a drive source for rotating the main shaft. In the dry-type rice washing apparatus, the main shaft has a screw portion having a spiral blade for transferring the processed rice supplied into the trough from the rice inlet, and the workpiece pushed out from the screw portion. A stirring portion that stirs rice in the trough, and the stirring portion is configured by projecting a plurality of stirring pins on the outer peripheral portion of the main shaft within a predetermined section in the length direction of the main shaft. A stripping groove is formed on the outer periphery of the pin, and the trough has a porous stripping cylinder part that covers the stirring part, and the stripping cylinder part is covered by an outer cylinder, A suction device is connected.

又、米導入口を有する筒状のトラフと、該トラフに沿ってその内部に配される主軸と、該主軸を回転させるための駆動源とを具備して成る乾式洗米装置において、前記主軸は前記米導入口よりトラフ内に供給された被加工米をトラフの長さ方向に移送するための螺旋羽根をもつスクリュー部と、該スクリュー部から押し出された被加工米を前記トラフ内で掻き回す撹拌部とを有し、その撹拌部は前記主軸の長さ方向における所定区間内で該主軸の外周部に複数の撹拌ピンを突設して構成される第１撹拌部と、前記主軸の外周面上で該主軸の長さ方向における所定区間に線状材を架設して構成される第２撹拌部とを備え、前記第１撹拌部を構成する各撹拌ピンの外周に除糠用溝が形成されると共に、前記トラフは前記撹拌部を覆う多孔状の除糠筒部を有し、その除糠筒部が外胴により覆われ、前記外胴には吸引装置が接続されることを特徴とする。   Further, in the dry rice washing apparatus comprising a cylindrical trough having a rice inlet, a main shaft disposed inside the trough, and a drive source for rotating the main shaft, the main shaft is A screw part having a spiral blade for transferring the work rice supplied from the rice inlet into the trough in the trough length direction, and stirring for stirring the work rice pushed out from the screw part in the trough A first agitating portion configured by projecting a plurality of agitating pins on an outer peripheral portion of the main shaft within a predetermined section in the length direction of the main shaft, and an outer peripheral surface of the main shaft And a second stirrer configured by laying a linear member in a predetermined section in the length direction of the main shaft, and a groove for removing the wrinkles is formed on the outer periphery of each stirrer pin constituting the first stirrer In addition, the trough is a porous debris covering the stirring unit Has a section, the bran removing cylinder portion is covered by the outer cylinder, the outer cylinder is characterized in that the suction device is connected.

尚、以上のような乾式洗米装置において、除糠用溝が螺旋状であり、その側縁には被加工米の表面から米糠を剥ぎ取るための切刃が形成されることが好ましく、更に線状材が矩形断面を有する一本の金属線に撚りを加えたもの、又は前記金属線の複数本を撚り合わせたものであることが好ましい。   In the dry rice washing apparatus as described above, it is preferable that the grooving groove has a spiral shape, and a cutting edge for stripping the rice bran from the surface of the processed rice is formed on the side edge. It is preferable that the shaped material is a single metal wire having a rectangular cross-section, or a twist of a plurality of the metal wires.

加えて、スクリュー部は、螺旋羽根の捩れ方向が互いに逆向きの第１スクリューと第２スクリューを直列状に連ねて構成されるものであることが好ましい。   In addition, it is preferable that the screw portion is configured by connecting in series a first screw and a second screw whose twist directions of the spiral blades are opposite to each other.

本発明に係る乾式洗米装置によれば、トラフ内に供給された被加工米を掻き回す撹拌部が主軸の外周部に突設した複数の撹拌ピンから構成され、その各撹拌ピンの外周に除糠用溝が形成されることから、該溝の側縁により被加工米の表面を擦過して米糠を良好に剥ぎ取ることができ、しかもトラフが撹拌部を覆う多孔状の除糠筒部を有し、これが外胴により覆われ、該外胴に吸引装置が接続されることから、被加工米から剥ぎ取られた米糠の大部分を速やかに外部排出してこれが被加工米の表面に再付着することを防止できる。   According to the dry rice washing apparatus according to the present invention, the stirring unit for stirring the workpiece rice supplied into the trough is composed of a plurality of stirring pins protruding from the outer peripheral part of the main shaft, and is removed on the outer periphery of each stirring pin. Since the grooves are formed, the side edges of the grooves can be used to scrape the surface of the rice to be processed, and the rice bran can be peeled off satisfactorily, and the trough has a porous removal cylinder part covering the stirring part. Since this is covered by the outer cylinder and a suction device is connected to the outer cylinder, most of the rice bran peeled off from the processed rice is quickly discharged to the outside and reattached to the surface of the processed rice. Can be prevented.

又、請求項２の発明では、撹拌部が主軸の外周部に複数の撹拌ピンを突設して構成される第１撹拌部と、主軸の外周面上に線状材を架設して構成される第２撹拌部とを備えることから、撹拌ピンと線状材との擦過作用により被加工米の表面から米糠を良好に剥ぎ取ることができ、その米糠も吸引装置による吸引除去により被加工米への再付着を防止することができる。   Further, in the invention of claim 2, the agitating part is constituted by a first agitating part constituted by projecting a plurality of agitating pins on the outer peripheral part of the main shaft, and a linear material constructed on the outer peripheral surface of the main axis. And the second stirring portion can be used to remove the rice bran from the surface of the processed rice by the rubbing action of the stirring pin and the linear material, and the rice bran is also removed to the processed rice by suction removal using a suction device. Can be prevented from re-adhering.

加えて、請求項３の発明では、螺旋状の除糠用溝にしてその側縁に切刃が形成されることから、被加工米の表面を低負荷で擦過しながら切刃によって米糠を至極良好に剥ぎ取ることができる。   In addition, in the invention of claim 3, since the cutting edge is formed on the side edge of the spiral removal groove, the rice bran is made to be extremely fine by the cutting edge while rubbing the surface of the processed rice with a low load. It can be peeled off satisfactorily.

又、請求項４の発明では、第２撹拌部を構成する線状材が矩形断面を有する金属線に撚りを加えるか、その複数本を撚り合わせて構成されることから、係る線状材でもその稜角部分で被加工米の表面から米糠を至極良好に剥ぎ取ることができる。   Further, in the invention of claim 4, since the linear material constituting the second stirring portion is configured by adding a twist to a metal wire having a rectangular cross section or by twisting a plurality of them, even such a linear material is used. The rice bran can be peeled off very well from the surface of the processed rice at the ridges.

更に、請求項５の発明では、被加工米をトラフの長さ方向に移送するスクリュー部が、螺旋羽根の捩れ方向が互いに逆向きの第１スクリューと第２スクリューを直列状に連ねて構成されことから、その両スクリューにより被加工米を高圧状態で揉みながら撹拌部側に押し出して、撹拌部の前段で被加工米から米糠の一部を剥ぎ取ることができる。   Furthermore, in the invention of claim 5, the screw part for transferring the workpiece rice in the trough length direction is constituted by connecting the first screw and the second screw in which the twist directions of the spiral blades are opposite to each other in series. For this reason, it is possible to extrude a part of the rice bran from the processed rice at the front stage of the stirring unit while pushing the processed rice to the stirring unit side with the both screws.

以下、図面に基づいて本発明を詳しく説明すると、図１は係る乾式洗米装置の好適な態様を示した側面概略図である。図１において、１は型鋼を結合するなどして構成される台枠であり、その上部には筒状のトラフ２が水平状に設置され、該トラフ２の部位に米糠を除去すべき処理前の被加工米を収容するためのホッパ部３が接続される。   Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic side view showing a preferred embodiment of the dry rice washing apparatus. In FIG. 1, reference numeral 1 denotes a frame constructed by joining steel molds, etc. A cylindrical trough 2 is horizontally installed on the upper part thereof, and before the rice bran is removed from the trough 2 portion. A hopper 3 for receiving the processed rice is connected.

トラフ２の内部にはその長さ方向に沿って後述する主軸４が回転自在に配され、該主軸の回転駆動によりホッパ部３からトラフ２内に供給された被加工米がトラフ２の長さ方向に移送されるようになっている。   A main shaft 4 which will be described later is rotatably arranged in the trough 2 along its length direction, and the work rice supplied into the trough 2 from the hopper 3 by the rotational drive of the main shaft is the length of the trough 2. It is transported in the direction.

５は主軸を回転させるための駆動源（電気モータ）であり、そのロータ軸とトラフ２の一端より突出する主軸４の一端部とには夫々プーリ６Ａ，６Ｂが取り付けられ、その両プーリにベルト７が巻き掛けられる構成としてある。   Reference numeral 5 denotes a drive source (electric motor) for rotating the main shaft. Pulleys 6A and 6B are attached to the rotor shaft and one end portion of the main shaft 4 projecting from one end of the trough 2, respectively. 7 is wound around.

又、主軸４の回転駆動による被加工米の移送方向下流側で、トラフ２は外胴８により覆われると共に、トラフ２の下流端は米糠が除去された処理済みの米を排出するための吐出口２Ｂとして外胴８より突出され、外胴８には吐出口２Ｂより排出された米を回収するためのシュート９が接続される。   Further, the trough 2 is covered with the outer body 8 on the downstream side in the transfer direction of the processed rice by the rotational drive of the main shaft 4, and the downstream end of the trough 2 is a discharge for discharging the processed rice from which the rice bran has been removed. The outlet 2B protrudes from the outer cylinder 8, and the outer cylinder 8 is connected to a chute 9 for collecting rice discharged from the discharge port 2B.

尚、図示せぬ公知の精米機と上記ホッパ部３とを連結し、精米機から取り出される精白米が米糠を除去すべき被加工米としてホッパ部３内に供給されるようにしてもよい。又、外胴８には、フレキシブルな吸気管１０を介して吸引装置１１が接続されるが、その作用については後述する。   In addition, you may make it connect the well-known rice milling machine which is not shown in figure and the said hopper part 3, and the milled rice taken out from a rice milling machine may be supplied in the hopper part 3 as processed rice which should remove rice bran. In addition, a suction device 11 is connected to the outer cylinder 8 via a flexible intake pipe 10, the operation of which will be described later.

次に、図２はトラフの長さ方向に沿う断面を示す。図２から明らかなように、トラフ２は適宜長さを有する導入筒部２１とその一端に接続する除糠筒部２２とで構成される。このうち、導入筒部２１は金属パイプなどから成る管路で、その上部にはホッパ部３の下端を接続するための米導入口２Ａが形成される。一方、除糠筒部２２は金網やパンチングメタルから形成される多孔状の管路であり、本例ではこれに網目が被加工米の粒径よりも細かい円筒状の金網（網目が約１mm×１mmのもの）が用いられる。   Next, FIG. 2 shows a cross section along the length direction of the trough. As is apparent from FIG. 2, the trough 2 is composed of an introduction cylinder part 21 having an appropriate length and a deriving cylinder part 22 connected to one end thereof. Among these, the introduction cylinder part 21 is a pipe line made of a metal pipe or the like, and the rice introduction port 2A for connecting the lower end of the hopper part 3 is formed in the upper part thereof. On the other hand, the removal cylinder portion 22 is a porous pipe formed of a wire mesh or punching metal. In this example, the mesh wire is a cylindrical wire mesh whose mesh is smaller than the grain size of the processed rice (the mesh is about 1 mm × 1 mm) is used.

そして、係る除糠筒部２２が外胴８により覆われると共に、該除糠筒部２２の一端が吐出口２Ｂとして外胴８の外部に突出されるようになっている。尚、外胴８には上部にヒンジ部１２をもつ開閉蓋１３が取り付けられるが、この開閉蓋１３は自重によってトラフの吐出口２Ｂを閉鎖し、被加工米の処理中には主軸４による被加工米の吐出圧により開閉蓋１３が開放されることになる。   And the said removal cylinder part 22 is covered with the outer cylinder 8, and the end of this removal cylinder part 22 protrudes outside the outer cylinder 8 as the discharge port 2B. An opening / closing lid 13 having a hinge portion 12 on the upper portion is attached to the outer cylinder 8. The opening / closing lid 13 closes the trough discharge port 2B by its own weight, and is covered by the main shaft 4 during processing of the processed rice. The open / close lid 13 is opened by the discharge pressure of the processed rice.

又、図２から明らかなように、主軸４はその上流側の一端部が導入筒部２１内にあって軸受１４で回転自在に支持されている。特に、係る主軸４は導入筒部２１内に挿入されるスクリュー部４Ａと、その下流側に連なって除糠筒部２２内に挿入される撹拌部４Ｂとを備える。   As is clear from FIG. 2, the main shaft 4 has one end portion on the upstream side in the introduction cylinder portion 21 and is rotatably supported by the bearing 14. In particular, the main shaft 4 includes a screw portion 4A that is inserted into the introduction tube portion 21 and a stirring portion 4B that is inserted into the removal tube portion 22 so as to be connected to the downstream side thereof.

スクリュー部４Ａは、米導入口２Ａよりトラフ２内に供給された被加工米をトラフ２の長さ方向に移送するためのものであり、特に本例では第１スクリュー４１と第２スクリュー４２を直列状に連ねた構成とされ、このうち第１スクリュー４１は米導入口２Ａの部分に位置付けられ、第２スクリュー４２は第１スクリュー４１に連続して導入筒部２１内からその下流の除糠筒部２２内に挿入される。   The screw part 4A is for transferring the processed rice supplied into the trough 2 from the rice inlet 2A in the length direction of the trough 2, and in this example, the first screw 41 and the second screw 42 are connected. The first screw 41 is positioned in the portion of the rice inlet 2A, and the second screw 42 is continuously connected to the first screw 41 from the inside of the introduction cylinder portion 21 to the downstream side thereof. It is inserted into the cylinder part 22.

又、第１スクリュー４１と第２スクリュー４２は、主軸４の外周部に螺旋羽根４１Ａ，４２Ａを突設したものであり、それらの螺旋羽根４１Ａ，４２Ａは捩れ方向が互いに逆向きとされ、しかも第１スクリューの螺旋羽根４１Ａよりも第２スクリューの螺旋羽根４２Ａのピッチが大きく設定される。これにより、係るスクリュー部４Ａでは第１スクリュー４１が被加工米を撹拌部４Ｂ側に向かわせる一方で、第２スクリュー４２がこれを逆流させるよう作用し、これによって被加工米が高圧状態で揉まれることになるが、第１スクリュー４１による送り量は第２スクリュー４２のそれを上回り、スクリュー部４Ａが全体として被加工米を撹拌部４Ｂに送り込むようになっている。   The first screw 41 and the second screw 42 have spiral blades 41A and 42A projecting from the outer periphery of the main shaft 4. The spiral blades 41A and 42A are twisted in opposite directions. The pitch of the spiral blade 42A of the second screw is set larger than that of the spiral blade 41A of the first screw. As a result, in the screw part 4A, the first screw 41 moves the processed rice toward the stirring part 4B, while the second screw 42 acts to reverse the processed rice, whereby the processed rice remains in a high-pressure state. However, the feed amount by the first screw 41 exceeds that of the second screw 42, and the screw portion 4A feeds the processed rice into the stirring portion 4B as a whole.

つまり、係るスクリュー部４Ａによれば、第１スクリュー４１によって被加工米がトラフ２の下流側（吐出口２Ｂ側）に移送される方向に主軸４を回転させると、その被加工米に対して第２スクリュー４２から上流側に逆流させるような力が作用するのであり、このため被加工米を第１スクリュー４１と第２スクリュー４２で揉むようにしながら除糠筒部２２内に徐々に供給し、除糠筒部２２内に供給される被加工米から予め米糠の一部を剥ぎ取ることができる。   That is, according to the screw part 4A, when the main shaft 4 is rotated in the direction in which the processed rice is transferred to the downstream side (the discharge port 2B side) of the trough 2 by the first screw 41, the processed rice is A force that causes the second screw 42 to flow backwards acts on the upstream side. For this reason, the rice to be processed is gradually fed into the removing cylinder portion 22 while being squeezed by the first screw 41 and the second screw 42. A part of the rice bran can be peeled off in advance from the processed rice supplied into the demolding cylinder portion 22.

一方、撹拌部４Ｂは、仕上用の主加工部としてスクリュー部４Ａより押し出された被加工米の表面から残存する米糠を剥ぎ取るためのもので、係る撹拌部４Ｂは本例において主軸４の長さ方向における所定区間内で該主軸の外周部に複数の撹拌ピン４３を放射状に突設して構成される。尚、主軸４は撹拌ピン４３を突設する撹拌部４Ｂの構成部分でスクリュー部４Ａよりも直径が小さく設定される。   On the other hand, the stirring section 4B is for stripping the remaining rice bran from the surface of the processed rice extruded from the screw section 4A as the main processing section for finishing, and the stirring section 4B is the length of the main shaft 4 in this example. A plurality of stirring pins 43 project radially from the outer periphery of the main shaft within a predetermined section in the vertical direction. The main shaft 4 is a constituent part of the agitating portion 4B that projects the agitating pin 43 and has a diameter smaller than that of the screw portion 4A.

特に、その小径部分に突設される各撹拌ピン４３は、図３のように外周に螺旋状の除糠用溝４３Ａを有しており、係る除糠用溝４３Ａの側縁には被加工米の表面から米糠を良好に剥ぎ取り得るよう図３および図４のような鋭角状の切刃４３Ｂが形成される。   In particular, each stirring pin 43 protruding from the small diameter portion has a spiral removal groove 43A on the outer periphery as shown in FIG. 3, and the side edge of the removal groove 43A is to be processed. An acute-angled cutting blade 43B as shown in FIGS. 3 and 4 is formed so that the rice bran can be peeled off from the surface of the rice well.

尚、本例では係る撹拌ピン４３として、炭素鋼、合金鋼、超硬合金、又はセラミックスなどの硬質材料から作られるドリルが用いられ、そのシャンク部４３Ｃが図５のように主軸４内に差し込まれて固定される。但し、撹拌ピン４３として棒鋼の外周面に上記のような除糠用溝を形成し、これを所定の長さに切断すると共に、その表面にチタンやダイヤモンドなどの耐摩耗性材料をコーティングしてもよい。又、金属の板や角柱を捩じることにより外周に螺旋状の除糠用溝をもつ撹拌ピン４３を形成することもできる。   In this example, a drill made of a hard material such as carbon steel, alloy steel, cemented carbide, or ceramics is used as the stirring pin 43, and the shank portion 43C is inserted into the main shaft 4 as shown in FIG. Fixed. However, as the stirring pin 43, the above-described groove for removing the debris is formed on the outer peripheral surface of the steel bar, and the groove is cut to a predetermined length, and the surface thereof is coated with a wear-resistant material such as titanium or diamond. Also good. Alternatively, the stirring pin 43 having a spiral removal groove on the outer periphery can be formed by twisting a metal plate or prism.

因みに、除糠用溝４３Ａが螺旋状であれば撹拌ピン４３の回転方向に対して切刃４３Ａが斜めになるので、被加工米の表面から米糠を低負荷で良好に剥ぎ取ることができ好ましいが、係る除糠用溝４３Ａは螺旋状に限らず、環状のものを撹拌ピン４３の軸方向に等間隔に形成したり、或いはスプラインのように軸方向に沿う直線状の形態としてもよい。   Incidentally, if the groove 43A for removing the helix is spiral, the cutting blade 43A is inclined with respect to the rotation direction of the stirring pin 43, so that the rice bran can be peeled off well from the surface of the rice to be processed with a low load. However, the removal groove 43A is not limited to a spiral shape, and an annular shape may be formed at equal intervals in the axial direction of the stirring pin 43, or may be a linear shape along the axial direction like a spline.

更に、図２および図５によれば、撹拌ピン４３を主軸４の周方向に対して９０度間隔に設けると共に、主軸４の長さ方向に対して１７本を等間隔に設けているが、本発明はこれに限定されるものでなく、主軸４の長さ方向における撹拌ピン４３の配列本数を増減したり、その周方向の間隔を変更してもよい。   Further, according to FIGS. 2 and 5, the stirring pins 43 are provided at intervals of 90 degrees with respect to the circumferential direction of the main shaft 4, and 17 are provided at regular intervals with respect to the length direction of the main shaft 4. This invention is not limited to this, You may increase / decrease the number of arrangement | sequence of the stirring pin 43 in the length direction of the main axis | shaft 4, and may change the space | interval of the circumferential direction.

ここで、以上のように構成される乾式洗米装置の作用を説明すると、洗米処理に際しては先ずホッパ部３内に米糠が付着している被加工米を投入し、その状態で駆動源５を起動して主軸４を所定方向に高速回転させる。すると、ホッパ部３内からトラフ２内に落下した被加工米が第１スクリュー４１により第２スクリュー４２側に押し出され、これが第２スクリュー４２による逆流作用によって導入筒部２１内で揉まれながら除糠筒部２２内に移送される。   Here, the operation of the dry-type rice washing apparatus configured as described above will be explained. In the rice washing process, firstly, the processing rice to which rice bran is attached is put into the hopper 3 and the drive source 5 is started in that state. Then, the main shaft 4 is rotated at a high speed in a predetermined direction. Then, the processed rice dropped into the trough 2 from the hopper 3 is pushed out to the second screw 42 side by the first screw 41, and is removed while being squeezed in the introduction cylinder portion 21 by the back flow action by the second screw 42. It is transferred into the barrel section 22.

除糠筒部２２内に移送された被加工米は、更に撹拌部４Ｂを構成する各撹拌ピン４３により図６のように掻き回され、その撹拌作用により米粒同士が擦り合わされると共に、各撹拌ピン４３に形成される除糠用溝４３Ａのエッジ（特に該溝４３Ａの側縁に形成される切刃４３Ｂ）により被加工米の表面が擦過される。   The work rice transferred into the removal cylinder portion 22 is further stirred as shown in FIG. 6 by the respective stirring pins 43 constituting the stirring portion 4B, and the rice grains are rubbed together by the stirring action, and each stirring is performed. The surface of the rice to be processed is abraded by the edge of the removal groove 43A formed on the pin 43 (particularly the cutting blade 43B formed on the side edge of the groove 43A).

これにより、被加工米の表面から米糠が剥ぎ取られ、剥ぎ取られた米糠は撹拌部４Ｂを覆う除糠筒部２２よりその外部に排出される。特に、除糠筒部２２を覆う外胴８には図１に示した吸引装置１１が接続されることから、撹拌部４Ｂにより剥ぎ取られた米糠の大部分は吸引装置１１の作動によって除糠筒部２２内から外胴８の外部に吸い出されて回収される。   As a result, the rice bran is peeled off from the surface of the processed rice, and the peeled rice bran is discharged to the outside from the removing cylinder part 22 covering the stirring part 4B. In particular, since the suction device 11 shown in FIG. 1 is connected to the outer cylinder 8 covering the removal cylinder portion 22, most of the rice bran peeled off by the stirring unit 4 </ b> B is removed by the operation of the suction device 11. It is sucked out from the inside of the cylindrical portion 22 to the outside of the outer body 8 and collected.

又、上記のようにして米糠が除去された被加工米は、スクリュー部４Ａによる押出力によりトラフの吐出口２Ｂより外胴８の外部に排出され、これがシュート９を通じ無洗米として回収される。   Further, the processed rice from which the rice bran has been removed as described above is discharged from the trough discharge port 2B to the outside of the outer body 8 by the pushing force of the screw portion 4A, and this is recovered as unwashed rice through the chute 9.

以上、本発明に係る乾式洗米装置についてその最良の形態を説明したが、本発明は上記例に限定されるものでなく、主軸を図７のような態様としてもよい。   The best mode of the dry rice washing apparatus according to the present invention has been described above, but the present invention is not limited to the above example, and the main shaft may be configured as shown in FIG.

ここに、図７は撹拌部４Ｂを第１撹拌部４４と第２撹拌部４５で構成した例である。詳しくは、第１撹拌部４４を撹拌ピン４３をもつ上記例の撹拌部と同様の構成とし、その下流側に第２撹拌部４５を付加したものである。   FIG. 7 shows an example in which the stirring unit 4B is composed of a first stirring unit 44 and a second stirring unit 45. Specifically, the first stirring unit 44 has the same configuration as the stirring unit of the above example having the stirring pin 43, and a second stirring unit 45 is added downstream thereof.

係る第２撹拌部４５は、主軸４の外周面上で該主軸の長さ方向における所定区間に複数本の線状材４６を架設、張設して構成される。４７Ａ，４７Ｂは架線用として主軸４の外周面にその周方向と軸方向に所定の間隔をあけて立てられるピンであり、それら各ピン４７Ａ，４７Ｂに線状材４６が主軸４と平行ないしは主軸４と所定の角度を有する状態で架設されるようになっている。特に、第２撹拌部４５の区間でも主軸４の直径がスクリュー部４Ａより小さく設定され、これにより線状材４６やピン４７Ａ，４７Ｂを除糠筒部２２の内周面に干渉させない状態で配し得るようにしてある。   The second stirring unit 45 is configured by laying and stretching a plurality of linear members 46 on a predetermined section in the length direction of the main shaft on the outer peripheral surface of the main shaft 4. 47A and 47B are pins that are provided on the outer peripheral surface of the main shaft 4 with a predetermined interval in the circumferential direction and the axial direction for overhead wires, and the linear material 46 is parallel to the main shaft 4 or the main shaft on each of the pins 47A and 47B. 4 and a predetermined angle. In particular, the diameter of the main shaft 4 is set to be smaller than that of the screw portion 4A even in the section of the second agitating portion 45, so that the linear material 46 and the pins 47A and 47B are arranged without interfering with the inner peripheral surface of the removal cylinder portion 22. It can be done.

又、主軸４の長さ方向に所定の間隔で立てられる二つ一組のピン４７Ａ，４７Ｂには、米粒が通り得る間隔を有して複数条の線状材４６が並列に架設されるが、それら各線状材４６には、矩形断面を有する一本の金属線に撚りを加えたもの、又は矩形断面を有する複数本の金属線を撚り合わせたものが用いられる。これによれば、第１撹拌部４４を通過した被加工米を第２撹拌部４５で掻き回しながら、捩れを有した線状材４６の稜角部分で被加工米の表面を擦過して米糠を良好に剥ぎ取ることができる。   In addition, a plurality of linear members 46 are laid in parallel on a pair of pins 47A and 47B that are set up at a predetermined interval in the length direction of the main shaft 4 and have an interval through which rice grains can pass. Each of the linear members 46 is formed by adding a twist to a single metal wire having a rectangular cross section, or by twisting a plurality of metal wires having a rectangular cross section. According to this, while the rice to be processed that has passed through the first stirring unit 44 is stirred by the second stirring unit 45, the surface of the processed rice is scratched at the ridge corner portion of the linear material 46 having a twist, and the rice bran is excellent. Can be peeled off.

尚、係る第１撹拌部４４と第２撹拌部４５も、図２に示した除糠筒部２２により覆われる。又、線状材４６には種々の金属材料を用いることができるが、これには熱処理を施すか、あるいはチタンなどの硬質材料を利用して耐摩耗性を付与することが望ましい。   In addition, the 1st stirring part 44 and the 2nd stirring part 45 which concerns are also covered with the dehulling cylinder part 22 shown in FIG. In addition, various metal materials can be used for the linear material 46, and it is desirable to give heat resistance to this by applying heat treatment or using a hard material such as titanium.

本発明に係る乾式洗米装置を示す側面概略図Side schematic diagram showing a dry-type rice washing apparatus according to the present invention 同洗米装置におけるトラフの長さ方向に沿う部分拡大断面図Partial expanded sectional view along the length direction of the trough in the rice washing apparatus 撹拌部を構成する撹拌ピンの好適な態様を示す側面図Side view showing a preferred embodiment of a stirring pin constituting the stirring unit 同撹拌ピンの先端概略図Schematic diagram of the tip of the stirring pin 同撹拌ピンを主軸に取り付けた状態を示す説明図Explanatory drawing which shows the state which attached the stirring pin to the main shaft 同撹拌ピンにより被加工米が掻き回される状態を示す説明図Explanatory drawing which shows the state by which the to-be-processed rice is stirred by the stirring pin 主軸の変更例を示す側面概略図Side schematic diagram showing an example of spindle change

符号の説明Explanation of symbols

１ 台枠
２ トラフ
２Ａ 米導入口
２Ｂ 吐出口
２１ 導入筒部
２２ 除糠筒部
３ ホッパ部
４ 主軸
４Ａ スクリュー部
４Ｂ 撹拌部
４１ 第１スクリュー
４２ 第２スクリュー
４１Ａ，４２Ｂ 螺旋羽根
４３ 撹拌ピン
４３Ａ 除糠用溝
４３Ｂ 切刃
４４ 第１撹拌部
４５ 第２撹拌部
４６ 線状材
1 Undercarriage 2 Trough 2A Rice inlet 2B Discharge port 21 Introducing cylinder part 22 Removal cylinder part 3 Hopper part 4 Spindle 4A Screw part 4B Agitation part 41 First screw 42 Second screw 41A, 42B Spiral blade 43 Agitation pin 43A Removal Groove groove 43B Cutting blade 44 First stirring section 45 Second stirring section 46 Linear material

Claims (5)

米導入口を有する筒状のトラフと、該トラフに沿ってその内部に配される主軸と、該主軸を回転させるための駆動源とを具備して成る乾式洗米装置において、前記主軸は前記米導入口よりトラフ内に供給された被加工米をトラフの長さ方向に移送するための螺旋羽根をもつスクリュー部と、該スクリュー部から押し出された被加工米を前記トラフ内で掻き回す撹拌部とを有し、その撹拌部は前記主軸の長さ方向における所定区間内で該主軸の外周部に複数の撹拌ピンを突設して構成され、その各撹拌ピンの外周に除糠用溝が形成されると共に、前記トラフは前記撹拌部を覆う多孔状の除糠筒部を有し、その除糠筒部が外胴により覆われ、前記外胴には吸引装置が接続されることを特徴とする乾式洗米装置。   A dry rice washing apparatus comprising a cylindrical trough having a rice inlet, a main shaft disposed inside the trough, and a drive source for rotating the main shaft, wherein the main shaft is the rice A screw part having a spiral blade for transferring the work rice supplied into the trough from the introduction port in the trough length direction, and a stirring part for stirring the work rice pushed out from the screw part in the trough; The stirring portion is configured by projecting a plurality of stirring pins on the outer peripheral portion of the main shaft within a predetermined section in the length direction of the main shaft, and a groove for removal is formed on the outer periphery of each stirring pin. In addition, the trough has a porous removal cylinder part covering the stirring part, the removal cylinder part is covered with an outer cylinder, and a suction device is connected to the outer cylinder. Dry rice washing equipment. 米導入口を有する筒状のトラフと、該トラフに沿ってその内部に配される主軸と、該主軸を回転させるための駆動源とを具備して成る乾式洗米装置において、前記主軸は前記米導入口よりトラフ内に供給された被加工米をトラフの長さ方向に移送するための螺旋羽根をもつスクリュー部と、該スクリュー部から押し出された被加工米を前記トラフ内で掻き回す撹拌部とを有し、その撹拌部は前記主軸の長さ方向における所定区間内で該主軸の外周部に複数の撹拌ピンを突設して構成される第１撹拌部と、前記主軸の外周面上で該主軸の長さ方向における所定区間に線状材を架設して構成される第２撹拌部とを備え、前記第１撹拌部を構成する各撹拌ピンの外周に除糠用溝が形成されると共に、前記トラフは前記撹拌部を覆う多孔状の除糠筒部を有し、その除糠筒部が外胴により覆われ、前記外胴には吸引装置が接続されることを特徴とする乾式洗米装置。   A dry rice washing apparatus comprising a cylindrical trough having a rice inlet, a main shaft disposed inside the trough, and a drive source for rotating the main shaft, wherein the main shaft is the rice A screw part having a spiral blade for transferring the work rice supplied into the trough from the introduction port in the trough length direction, and a stirring part for stirring the work rice pushed out from the screw part in the trough; The stirring portion has a first stirring portion configured by projecting a plurality of stirring pins on the outer peripheral portion of the main shaft within a predetermined section in the length direction of the main shaft, and on the outer peripheral surface of the main shaft. A second stirrer configured by laying a linear material in a predetermined section in the length direction of the main shaft, and a groove for removal is formed on the outer periphery of each stirrer pin constituting the first stirrer In addition, the trough is a porous stripping cylinder that covers the stirring unit Has its bran removing cylinder portion is covered by the outer cylinder, dry rice washing device, characterized in that the suction device is connected to the outer cylinder. 除糠用溝が螺旋状であり、その側縁には被加工米の表面から米糠を剥ぎ取るための切刃が形成される請求項１、又は２記載の乾式洗米装置。   The dry rice washing apparatus according to claim 1 or 2, wherein the groove for removing the hair is spiral, and a cutting edge for peeling the rice bran from the surface of the processed rice is formed on a side edge thereof. 線状材が矩形断面を有する一本の金属線に撚りを加えたもの、又は前記金属線の複数本を撚り合わせたものである請求項２記載の乾式洗米装置。   The dry-type rice-washing apparatus according to claim 2, wherein the linear material is a single metal wire having a rectangular cross section, or a twist of a plurality of the metal wires. スクリュー部は、螺旋羽根の捩れ方向が互いに逆向きの第１スクリューと第２スクリューを直列状に連ねて成る請求項１〜４の何れかに記載の乾式洗米装置。
The dry-type rice washing apparatus according to any one of claims 1 to 4, wherein the screw portion is formed by connecting in series a first screw and a second screw in which the twisting directions of the spiral blades are opposite to each other.

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