JP2016023075A - Air supply/exhaust device for air flotation type conveyer - Google Patents

Air supply/exhaust device for air flotation type conveyer Download PDF

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JP2016023075A
JP2016023075A JP2014150775A JP2014150775A JP2016023075A JP 2016023075 A JP2016023075 A JP 2016023075A JP 2014150775 A JP2014150775 A JP 2014150775A JP 2014150775 A JP2014150775 A JP 2014150775A JP 2016023075 A JP2016023075 A JP 2016023075A
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air
exhaust
air supply
supply
circulation line
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透 太田
Toru Ota
透 太田
昭洋 田中
Akihiro Tanaka
昭洋 田中
藤田　昌弘
Masahiro Fujita
昌弘 藤田
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IHI Transport Machinery Co Ltd
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IHI Transport Machinery Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an air supply/exhaust device for an air flotation type conveyer without wasteful power and wasteful facility.SOLUTION: In the air supply/exhaust device for an air flotation type conveyer, belts 11a, 11b in the carrier side and the return side of an endless conveyer belt 11 are supported with troughs 12a, 12b, and wind boxes 13a, 13b for supplying floating air for floating the belt 11a, 11b are provided in lower parts of the troughs 12a, 12b, and exhaust chambers 20a, 20b are formed by arranging top covers 16a, 16b on the trough 12a, 12b. An air circulation line 33 is connected by connecting the exhaust chambers 20a, 20b to the wind boxes 13a, 13b, and an air supply/exhaust fan 34 is connected to the air circulation line 33.SELECTED DRAWING: Figure 1

Description

本発明は、石炭等の搬送物を搬送する空気浮上式コンベアに係り、特にベルト浮上用の空気とその空気を排気するための空気浮上式コンベアの給排気装置に関するものである。   The present invention relates to an air levitation conveyor for conveying an object such as coal, and more particularly to an air levitation conveyor and an air levitation conveyor air supply / exhaust device for exhausting the air.

図２に示すように、空気浮上式コンベア１０は、駆動ローラと従動ローラ（図示せず）に石炭などの搬送物Ｓを搬送するための無端状のコンベアベルト１１が掛け渡され、そのコンベアベルト１１のキャリア側ベルト１１ａとリターン側ベルト１１ｂの下方に、ベルト１１ａ、１１ｂをそれぞれ支承する断面円弧状のトラフ１２（１２ａ、１２ｂ）が設けられ、そのトラフ１２ａ、１２ｂの下部に風箱１３（１３ａ、１３ｂ）が設けられると共にトラフ１２ａ、１２ｂに、風箱１３ａ、１３ｂに供給された空気をキャリア側ベルト１１ａとリターン側ベルト１１ｂに吹き出す空気穴１４（１４ａ，１４ｂ）が適宜間隔で穿設されて構成される。   As shown in FIG. 2, the air floating conveyor 10 has a drive roller and a driven roller (not shown) over which an endless conveyor belt 11 for conveying a conveyed product S such as coal is stretched. 11 is provided with troughs 12 (12a, 12b) having an arcuate cross section for supporting the belts 11a, 11b, respectively, below the carrier side belt 11a and the return side belt 11b, and an air box 13 (below the troughs 12a, 12b). 13a, 13b) and air holes 14 (14a, 14b) for blowing the air supplied to the air boxes 13a, 13b to the carrier side belt 11a and the return side belt 11b are formed at appropriate intervals in the troughs 12a, 12b. Configured.

トラフ１２ａ、１２ｂの両側は、支持脚１５にて支持され、そのトラフ１２ａ、１２ｂの上部には、キャリア側ベルト１１ａとリターン側ベルト１１ｂを覆うトップカバー１６（１６ａ、１６ｂ）が設けられる。   Both sides of the troughs 12a and 12b are supported by support legs 15, and a top cover 16 (16a and 16b) covering the carrier side belt 11a and the return side belt 11b is provided above the troughs 12a and 12b.

図３に示すようにトラフ１２は、鋼板で断面円弧状に形成され、その下方に風箱１３が設けられ、送風ファンからの空気が図示の矢印で示したように空気穴１４からトラフ１２とコンベアベルト１１の間に供給され、その空気の圧力で搬送物Ｓを載せたコンベアベルト１１（リターン側ではコンベアベルト１１のみ）を浮上させるようになっている。   As shown in FIG. 3, the trough 12 is formed of a steel plate in a circular arc shape, and a wind box 13 is provided below the trough 12, and air from the blower fan is connected to the trough 12 from the air hole 14 as indicated by the arrow in the figure. The conveyor belt 11 (only the conveyor belt 11 on the return side) that is supplied between the conveyor belts 11 and carries the conveyed product S by the pressure of the air is levitated.

また、トラフ１２には、フランジ１７にて、トップカバー１６が接続されて密閉された排気室２０が形成され、その排気室２０にコンベアベルト１１を浮上させた空気を排出する排気ダクト１９が接続される。排気ダクト１９には、図示していないが集塵器（図示せず）を介して集塵ファンが接続される。   In addition, the trough 12 is formed with an exhaust chamber 20 that is sealed with a top cover 16 at a flange 17, and an exhaust duct 19 that discharges the air that has lifted the conveyor belt 11 is connected to the exhaust chamber 20. Is done. Although not shown, a dust collecting fan is connected to the exhaust duct 19 via a dust collector (not shown).

この空気浮上式コンベア１０においては、コンベアベルト１１を浮上するための浮上用空気が送風ファンで風箱１３に供給され、コンベアベルト１１を浮上させた後の空気は、トラフ１２上の排気室２０に流れ、排気室２０から排気ダクト１９を通り、搬出端側のシュートでの局部集塵分の空気と合わせて、集塵器を通して除塵された後、集塵ファンから大気に排気されるようになっている。   In the air floating conveyor 10, the floating air for floating the conveyor belt 11 is supplied to the wind box 13 by the blower fan, and the air after the conveyor belt 11 is lifted is the exhaust chamber 20 on the trough 12. So that the air is exhausted from the dust collecting fan to the atmosphere after being removed from the exhaust chamber 20 through the exhaust duct 19 and the dust collected through the dust collector together with the air collected by the chute on the carry-out end side. It has become.

特開平１０−３３８３２３号公報JP 10-338323 A 特開２００１−８８９２３号公報JP 2001-88923 A

しかしながら、送風ファンで供給した空気浮上用空気を、集塵ファンで、同量回収して排気しており、２台のファンが必要となるため、動力、設備に無駄がある。   However, the air levitation air supplied by the blower fan is recovered and exhausted by the same amount by the dust collecting fan, and two fans are required, so power and equipment are wasted.

そこで、本発明の目的は、上記課題を解決し、動力、設備に無駄がない空気浮上式コンベアの給排気装置を提供することにある。   Accordingly, an object of the present invention is to solve the above-described problems and provide an air supply / exhaust device for an air floating conveyor that has no waste of power and facilities.

上記目的を達成するために本発明は、無端状のコンベアベルトのキャリア側とリターン側ベルトをトラフで支承し、そのトラフの下部にベルトを浮上させるための浮上用空気を供給する風箱を設け、トラフ上にトップカバーを設けて排気室を形成した空気浮上式コンベアの給排気装置において、前記排気室と風箱を結んで空気循環ラインを接続し、その空気循環ラインに給排気ファンを接続したことを特徴とする空気浮上式コンベアの給排気装置である。   In order to achieve the above object, the present invention provides a wind box for supporting the carrier side and return side belts of an endless conveyor belt with a trough, and for supplying floating air to float the belt under the trough. In an air floating conveyor air supply / exhaust device with a top cover on the trough to form an exhaust chamber, the air circulation line is connected by connecting the exhaust chamber and the wind box, and an air supply / exhaust fan is connected to the air circulation line An air supply / exhaust device for an air levitation conveyor.

本発明は、空気循環ラインを設け、その空気循環ラインに給排気ファンを接続することで、給気と排気を共用化できるという優れた効果を発揮する。   The present invention provides an excellent effect that air supply and exhaust can be shared by providing an air circulation line and connecting an air supply / exhaust fan to the air circulation line.

本発明の一実施の形態を示す概略断面図である。It is a schematic sectional drawing which shows one embodiment of this invention. 空気浮上式コンベアの概略斜視図である。It is a schematic perspective view of an air floating type conveyor. 図２における空気浮上式コンベアの概略断面図である。It is a schematic sectional drawing of the air floating type conveyor in FIG.

以下、本発明の好適な一実施の形態を添付図面に基づいて詳述する。   A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

先ず、本発明の空気浮上式コンベアの基本構成は、図２、図３で説明した通りであり、機能が同じ部材には同一符号を付して説明する。   First, the basic configuration of the air-floating conveyor of the present invention is as described with reference to FIGS. 2 and 3, and members having the same functions are denoted by the same reference numerals.

さて、図１は、空気浮上式コンベアの搬送方向での概略断面図を示したものである。   Now, FIG. 1 shows a schematic sectional view in the conveying direction of the air-floating conveyor.

この図１は、空気浮上式コンベア１０が多段に連結して構成した例を示し、空気浮上式コンベア１０の搬入端２４に、上流側空気浮上式コンベア１０Ｕの搬出端２５Ｕのシュート部が接続された状態を示し、空気浮上式コンベア１０の搬出端２５のシュート部に、さらに下流の空気浮上式コンベア１０或いは貯留槽が接続された状態を示しているが、搬入端２４と搬出端２５を除いてコンベア構造は、図１、図２で説明した通りである。   FIG. 1 shows an example in which the air levitation conveyor 10 is connected in multiple stages. The chute portion of the carry-out end 25U of the upstream air levitation conveyor 10U is connected to the carry-in end 24 of the air levitation conveyor 10. The state where the downstream air levitation conveyor 10 or the storage tank is connected to the chute portion of the carry-out end 25 of the air levitation conveyor 10 is shown, but the carry-in end 24 and the carry-out end 25 are excluded. The conveyor structure is as described with reference to FIGS.

この空気浮上式コンベア１０の搬入端２４には、コンベアベルト１１の従動プーリ３０が設けられ、搬出端２５には駆動プーリ３１が設けられる。   A driven pulley 30 of the conveyor belt 11 is provided at the carry-in end 24 of the air floating conveyor 10, and a drive pulley 31 is provided at the carry-out end 25.

この従動プーリ３０と駆動プーリ３１間のキャリア側ベルト１１ａは、トラフ１２ａ上で保持され、そのトラフ１２ａにトップカバー１６ａが設けられてキャリア側排気室２０ａが形成され、また従動プーリ３０と駆動プーリ３１間のリターン側ベルト１１ｂは、トラフ１２ｂ上で保持され、そのトラフ１２ｂにトップカバー１６ｂが設けられてリターン側排気室２０ｂが形成される。   The carrier side belt 11a between the driven pulley 30 and the driving pulley 31 is held on the trough 12a, and a top cover 16a is provided on the trough 12a to form a carrier side exhaust chamber 20a. The driven pulley 30 and the driving pulley The return side belt 11b between 31 is held on the trough 12b, and a top cover 16b is provided on the trough 12b to form a return side exhaust chamber 20b.

キャリア側トラフ１２ａとリターン側トラフ１２ｂには、それぞれ風箱１３ａ、１３ｂが設けられる。この風箱１３ａ、１３ｂは、搬送物の搬送方向に沿って仕切板２６ａ、２６ｂにて複数の独立した分割風箱１３ｓに区画される。   The carrier side trough 12a and the return side trough 12b are provided with wind boxes 13a and 13b, respectively. The wind boxes 13a and 13b are partitioned into a plurality of independent divided wind boxes 13s by partition plates 26a and 26b along the conveyance direction of the conveyed product.

搬入端２４側のキャリア側排気室２０ａ及びリターン側排気室２０ｂと、風箱１３ａ、１３ｂとを結んで空気循環ライン３３が接続され、その空気循環ライン３３に給排気ファン３４が接続される。   The air circulation line 33 is connected to the carrier side exhaust chamber 20 a and the return side exhaust chamber 20 b on the carry-in end 24 side, and the wind boxes 13 a and 13 b, and the air supply and exhaust fan 34 is connected to the air circulation line 33.

空気循環ライン３３は、搬入端２４側のキャリア側排気室２０ａ及びリターン側排気室２０ｂに設けられた排気ダクト１９ａ、１９ｂが合流された吸込側空気循環ライン３３ｓと、給排気ファン３４の給気側に接続され、風箱１３ａ、１３ｂと接続する給気側空気循環ライン３３ｄとからなる。   The air circulation line 33 includes a suction-side air circulation line 33 s in which exhaust ducts 19 a and 19 b provided in the carrier-side exhaust chamber 20 a and the return-side exhaust chamber 20 b on the carry-in end 24 side are joined, and an air supply of the supply / exhaust fan 34. And an air supply side air circulation line 33d connected to the wind boxes 13a and 13b.

吸込側空気循環ライン３３ｓには、流量調整弁３５と集塵器３６とが接続される。給気側空気循環ライン３３ｄは、風箱１３ａ、１３ｂに沿って設けられた給気ダクト３７と、給気ダクト３７と風箱１３ａ、１３ｂの各分割風箱１３ｓを結んだ枝管３８ａ、３８ｂと、その各枝管３８ａ、３８ｂに接続された風量調整ダンパ３９ａ、３９ｂとで構成される。給気ダクト３７には、給気ダクト３７からの給気を各枝管３８ａ、３８ｂに均一に流すために給気ダクト３７の開度を調節するためのレジューサ４０が、給気ダクト３７に沿って複数個設けられる。   A flow rate adjustment valve 35 and a dust collector 36 are connected to the suction side air circulation line 33s. The air supply side air circulation line 33d includes an air supply duct 37 provided along the air boxes 13a and 13b, and branch pipes 38a and 38b connecting the air supply duct 37 and the divided air boxes 13s of the air boxes 13a and 13b. And air volume adjusting dampers 39a and 39b connected to the branch pipes 38a and 38b. In the air supply duct 37, a reducer 40 for adjusting the opening degree of the air supply duct 37 in order to flow the air supply from the air supply duct 37 uniformly to the branch pipes 38 a and 38 b is provided along the air supply duct 37. Are provided.

給排気ファン３４の給気側には、給気ダクト３７に供給する給気量を調整する風量調整用主ダンパ４１が接続される。また、風量調整用主ダンパ４１の下流側には、余剰の空気を排出するサイレンサー４２が接続される。また給排気ファン３４の吸込側と吸込側空気循環ライン３３ｓとは伸縮継手４３で接続され、風量調整用主ダンパ４１の吐出側と給気ダクト３７とは伸縮継手４４で接続され、サイレンサー４２も伸縮継手４５で接続される。   An air volume adjusting main damper 41 for adjusting the amount of air supplied to the air supply duct 37 is connected to the air supply side of the air supply / exhaust fan 34. Further, a silencer 42 for discharging excess air is connected to the downstream side of the air volume adjusting main damper 41. Further, the suction side of the air supply / exhaust fan 34 and the suction side air circulation line 33s are connected by an expansion joint 43, the discharge side of the air volume adjusting main damper 41 and the air supply duct 37 are connected by an expansion joint 44, and the silencer 42 is also connected. The expansion joint 45 is connected.

空気浮上式コンベア１０の搬入端２４には、搬入端２４内の粉塵を含む空気を排出する排気ライン４６が接続される。この排気ライン４６は、流量調整弁４７を介して吸込側空気循環ライン３３ｓに接続される。また上流側空気浮上式コンベア１０Ｕの搬出端２５Ｕのシュート部には排気ライン４６ｕが接続され、その排気ライン４６ｕが空気浮上式コンベア１０の搬入端２４の排気ライン４６に接続される。また空気浮上式コンベア１０の搬出端２５には、排気ライン４８が接続される。   An exhaust line 46 for discharging air containing dust in the carry-in end 24 is connected to the carry-in end 24 of the air floating conveyor 10. The exhaust line 46 is connected to the suction side air circulation line 33 s via a flow rate adjusting valve 47. An exhaust line 46u is connected to the chute portion of the carry-out end 25U of the upstream air floating conveyor 10U, and the exhaust line 46u is connected to the exhaust line 46 at the carry-in end 24 of the air floating conveyor 10. An exhaust line 48 is connected to the carry-out end 25 of the air floating conveyor 10.

給排気ファン３４、サイレンサー４２は中継建屋５０内に収容される。   The supply / exhaust fan 34 and the silencer 42 are accommodated in the relay building 50.

次に、本実施の形態の作用を説明する。   Next, the operation of the present embodiment will be described.

本実施の形態においては、空気浮上式コンベア１０の搬入端２４側のキャリア側排気室２０ａ及びリターン側排気室２０ｂと風箱１３ａ、１３ｂとが空気循環ライン３３で接続され、その空気循環ライン３３に給排気ファン３４が接続されることで、給気と排気のファンを共用化することが可能となる。   In the present embodiment, the carrier-side exhaust chamber 20a and the return-side exhaust chamber 20b on the carry-in end 24 side of the air floating conveyor 10 and the wind boxes 13a and 13b are connected by the air circulation line 33, and the air circulation line 33 By connecting the air supply / exhaust fan 34 to the air supply / exhaust fan 34, the supply / exhaust fan can be shared.

給排気ファン３４からの給気は、給気ダクト３７から、枝管３８ａ、３８ｂを介して、それぞれ風量調整ダンパ３９ａ、３９ｂで流量が調整されて、風箱１３ａ、１３ｂの各分割風箱１３ｓに供給され、その分割風箱１３ｓから、トラフ１２ａ、１２ｂに供給されて、キャリア側ベルト１１ａとリターン側ベルト１１ｂを浮上させる。   The air supply from the air supply / exhaust fan 34 is adjusted by the air flow adjustment dampers 39a and 39b from the air supply duct 37 through the branch pipes 38a and 38b, respectively, and the divided wind boxes 13s of the wind boxes 13a and 13b are respectively adjusted. Is supplied to the troughs 12a and 12b from the divided air box 13s, and the carrier side belt 11a and the return side belt 11b are levitated.

その後、浮上に供した給気は、トラフ１２ａ、１２ｂとベルト１１ａ、１１ｂ間の隙間からキャリア側排気室２０ａ、リターン側排気室２０ｂに流れ、その排気室２０ａ、２０ｂ内を搬送物の搬送方向と逆方向に流れて搬入端２４の排気ダクト１９ａ、１９ｂから吸込側空気循環ライン３３ｓに流れ、集塵器３６で粉塵が除去された後、再度、給排気ファン３４から給気ダクト３７を通して風箱１３ａ、１３ｂに循環される。   Thereafter, the air supplied to the levitation flows from the gaps between the troughs 12a and 12b and the belts 11a and 11b to the carrier-side exhaust chamber 20a and the return-side exhaust chamber 20b, and the inside of the exhaust chambers 20a and 20b is conveyed in the conveyance direction. The air flows from the exhaust ducts 19a, 19b at the carry-in end 24 to the suction-side air circulation line 33s, and dust is removed by the dust collector 36. Then, the air flows from the air supply / exhaust fan 34 through the air supply duct 37 again. It is circulated through the boxes 13a and 13b.

また、吸込側空気循環ライン３３ｓには、空気浮上式コンベア１０の搬入端２４からの空気が排気ライン４６から、また上流側空気浮上式コンベア１０Ｕの搬出端２５Ｕからの空気が排気ライン４６ｕから同時に流入するため、余剰分はサイレンサー４２から放出する。   Further, in the suction-side air circulation line 33s, air from the carry-in end 24 of the air floating conveyor 10 is simultaneously supplied from the exhaust line 46, and air from the carry-out end 25U of the upstream air floating conveyor 10U is simultaneously supplied from the exhaust line 46u. Since it flows in, the surplus is discharged from the silencer 42.

空気浮上式コンベア１０は、その長さが１００ｍから数１００ｍもあり、キャリア側排気室２０ａ、リターン側排気室２０ｂの搬入端側に、排気ダクト１９ａ、１９ｂを設けることで、空気循環ライン３３の系路の配管長を短くできる。   The air-floating conveyor 10 has a length of 100 m to several hundreds of meters. By providing exhaust ducts 19a and 19b on the carry-in end side of the carrier-side exhaust chamber 20a and the return-side exhaust chamber 20b, the air circulation line 33 The piping length of the system can be shortened.

また、空気浮上式コンベア１０は、搬送物を地上側から貯留槽の上方に搬送するため、搬入端２４側が搬出端２５より低く形成されるため、主にキャリア側排気室２０ａを流れる空気は、排気室２０ａを斜め下方に流れ、その間に空気中の粉塵がベルト１１ａ上に落下するため、空気中の粉塵量も少なくすることができる。   In addition, since the air floating conveyor 10 conveys the conveyed product from the ground side to above the storage tank, the carry-in end 24 side is formed lower than the carry-out end 25, so the air flowing mainly through the carrier-side exhaust chamber 20a is Since the dust in the air flows obliquely downward through the exhaust chamber 20a and falls in the meantime on the belt 11a, the amount of dust in the air can be reduced.

１０ 空気浮上式コンベア
１１ コンベアベルト
１１ａ キャリア側ベルト
１１ｂ リターン側ベルト
１２ａ、１２ｂ トラフ
１３ａ、１３ｂ 風箱
１６ａ、１６ｂ トップカバー
２０ａ、２０ｂ 排気室
３３ 空気循環ライン
３４ 給排気ファン DESCRIPTION OF SYMBOLS 10 Air floating type conveyor 11 Conveyor belt 11a Carrier side belt 11b Return side belt 12a, 12b Trough 13a, 13b Wind box 16a, 16b Top cover 20a, 20b Exhaust chamber 33 Air circulation line 34 Supply / exhaust fan

Claims (5)

無端状のコンベアベルトのキャリア側とリターン側ベルトをトラフで支承し、そのトラフの下部にベルトを浮上させるための浮上用空気を供給する風箱を設け、トラフ上にトップカバーを設けて排気室を形成した空気浮上式コンベアの給排気装置において、前記排気室と風箱を結んで空気循環ラインを接続し、その空気循環ラインに給排気ファンを接続したことを特徴とする空気浮上式コンベアの給排気装置。   The carrier side and return side belts of an endless conveyor belt are supported by troughs, and an air chamber is provided at the lower part of the troughs to supply the floating air for levitation of the belts. In the air levitation conveyor supply / exhaust device, the air evacuation conveyor is connected to the air circulation line by connecting the exhaust chamber and the wind box, and the air circulation line is connected to the air circulation line. Air supply / exhaust system. 前記給排気ファンの吸込側空気循環ラインに集塵器が接続される請求項１に記載の空気浮上式コンベアの給排気装置。   The air supply / exhaust device for an air floating conveyor according to claim 1, wherein a dust collector is connected to a suction side air circulation line of the air supply / exhaust fan. キャリア側のトラフとリターン側のトラフの搬送物の搬入端側に位置して空気循環ラインの排気ダクトが接続されると共に、搬送物の搬入端側に位置して前記給排気ファンが設置される請求項１又は２に記載の空気浮上式コンベアの給排気装置。   The exhaust duct of the air circulation line is connected to the carrier-side trough and the return-side trough on the carry-in end side of the conveyed product, and the supply / exhaust fan is installed on the carry-in end side of the conveyed product The air supply / exhaust device for an air floating conveyor according to claim 1 or 2. 前記給排気ファンの給気側空気循環ラインは、風箱に沿って設けられた給気ダクトで構成され、他方前記風箱が搬送物の搬送方向に沿って仕切板にて複数に区画され、その区画された風箱毎に風量調整ダンパを介して前記給気ダクトに接続される請求項３記載の空気浮上式コンベアの給排気装置。   The air supply side air circulation line of the air supply / exhaust fan is configured by an air supply duct provided along a wind box, while the wind box is divided into a plurality of partitions along a transfer direction of a transfer object, The air supply / exhaust device for an air-lifting conveyor according to claim 3, wherein each of the partitioned air boxes is connected to the air supply duct via an air flow adjusting damper. 空気浮上式コンベアが多段に連結され、その上流側の空気浮上式コンベアの搬出端のシュート部に排気ラインが接続され、その排気ラインが前記空気循環ラインの吸込側に接続される請求項１〜４のいずれかに記載の空気浮上式コンベアの給排気装置。   The air levitation conveyor is connected in multiple stages, an exhaust line is connected to a chute portion of the upstream end of the air levitation conveyor, and the exhaust line is connected to the suction side of the air circulation line. 4. The air supply / exhaust device for an air floating conveyor according to claim 4.
JP2014150775A 2014-07-24 2014-07-24 Air supply/exhaust device for air flotation type conveyer Pending JP2016023075A (en)

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WO2019202956A1 (en) * 2018-04-16 2019-10-24 川崎重工業株式会社 Belt conveyor and method for suppressing vibration of belt conveyor
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KR102356567B1 (en) 2018-04-16 2022-02-08 카와사키 주코교 카부시키 카이샤 Belt conveyer

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