JP4247935B2

JP4247935B2 - Chip compressor

Info

Publication number: JP4247935B2
Application number: JP07576599A
Authority: JP
Inventors: 健一山本
Original assignee: Ricoh Elemex Corp
Current assignee: Ricoh Elemex Corp
Priority date: 1999-03-19
Filing date: 1999-03-19
Publication date: 2009-04-02
Anticipated expiration: 2019-03-19
Also published as: JP2000263370A

Description

【０００１】
【発明の属する技術分野】
本発明は、旋盤、フライス盤、ボール盤等の工作機械等から出た切り粉を圧縮して固める切り粉圧縮機に関する。
【０００２】
【従来の技術】
旋盤、フライス盤、ボール盤等の工作機械等により金属材料等を切削するときには、切削屑としての切り粉が生成される。このような切り粉を再利用する際に、切り粉を一定量固める装置として切り粉圧縮機が知られている。そのような切り粉圧縮機としては、切り粉を蓄えた後に切り粉を順次排出するホッパと、切り粉を固めるための圧縮装置とを備えたものが知られている。また、この切り粉圧縮機においては、ホッパから排出されてきた切り粉を圧縮装置に送るための装置としてスパイラルスクリュー（切り粉搬送部）が１ないし複数本設けられているものがある。
【０００３】
上記のような切り粉圧縮機は、例えば、切り粉の形状によって、切り粉がスパイラルスクリューの上方に滞留してブリッジを作り、切り粉を圧縮装置に排出できなくなることがある。そのため、本出願人は切り粉を排出方向に押して排出を補助する排出助成部を設けてブリッジを崩壊する技術を開発し、特許出願している。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記排出助成部を有する切り粉圧縮機においても、以下のような更に解決すべき点があることが判明した。例えば、カール状の切り粉をホッパに一杯まで入れて処理をする場合、処理が進む過程において、ホッパ内のスパイラルスクリュー付近で切り粉が固まり、排出助成部で切り粉を押しても、切り粉がスパイラルスクリューのスクリュー条部（羽根）の間に入らず、切り粉の圧縮装置への搬送量が処理初期の１／５〜１／４程度に少なくなることがある。
【０００５】
また、長いカール状の切り粉の場合、切り粉がスパイラルスクリューに絡みつき、スパイラルスクリューと一緒に回転するために、切り粉の圧縮装置への搬送量が少なくなることもある。さらに、スパイラルスクリューのスクリュー条部の外周によって、切り粉の自重及び排出助成部からの押付力が支えられ、スクリュー条部間に切り粉が入り込まなくなり、切り粉の圧縮装置への搬送量が少なくなることもある。
【０００６】
本発明の課題は、上記の問題を改善し、ホッパ内に蓄えられた切り粉を効率良く全て圧縮装置に送ることができる切り粉圧縮機を提供することにある。
【０００７】
【課題を解決するための手段及び発明の効果】
本発明は、切り粉を一時的に蓄えるとともに、底側から該切り粉が排出されるホッパと、
そのホッパに設置され、そのホッパに蓄えられた前記切り粉が前記底側から排出される際に、該切り粉を底側に押して排出を補助する排出助成部と、
前記ホッパの底側に形成され、前記ホッパから排出された前記切り粉を搬送する切り粉搬送部と、
前記切り粉搬送部によって搬送されてきた前記切り粉を圧縮して固める圧縮部とを有しており、
前記排出助成部は、前記ホッパの内壁面に沿って往復移動可能に組み込まれ、前記ホッパの底に向けて斜め上方から接近することで、前記切り粉を押して該切り粉の排出を補助する排出状態と、排出の補助を行わず前記ホッパに切り粉が導入される待機状態とが周期的に繰り返され、
さらに、前記排出助成部には、前記ホッパ内に蓄えられた前記切り粉を撹拌するための撹拌部が設けられ、その撹拌部は、前記排出助成部の排出状態から待機状態への移行に伴って前記切り粉の一部を連れて移動させる面ないし部分を有し、主にこの切り粉の強制的な連れ移動に基づき撹拌を行うことを特徴とする。
【０００８】
上記のように、排出助成部並びに撹拌部を設けたことにより、排出助成部の切り粉を押し込む作動により切り粉のブリッジが生じにくく、また、撹拌部が切り粉を撹拌するため、切り粉が切り粉搬送部付近で固まることを防ぎ、切り粉の圧縮部への搬送量が減少することを回避できる。
【００１０】
また、排出助成部をホッパの内壁面に沿って往復移動自在に組み付け、ホッパの底に向けて例えば斜め上方からスライドすることで、切り粉を押しながら切り粉の排出を補助する排出状態と、排出の補助を行わずホッパに切り粉が導入される待機状態とを周期的に繰り返すものとし、かつ、
上記撹拌部を、排出助成部の排出状態から待機状態への移行に伴って切り粉の撹拌を行う構成とすることができる。このように、排出助成部を周期的にスライドさせると、切り粉のブリッジ解消の効果が高くなる。
【００１１】
また、切り粉搬送部として、軸状の本体部の外周面に螺旋状の搬送条部が形成され、その搬送条部間に形成された凹部内に切り粉を保持しつつ、自身の軸線周りに回転することにより、その切り粉を軸線方向に搬送するスパイラル搬送部を採用し、
排出助成部には、排出助成部が切り粉をホッパの底側へ押し付けて排出を補助するときに、スパイラル搬送部（切り粉搬送部）の軸線周りの回転に伴って切り粉が回転することを防止する切り粉回転抑制部を設けることができる。
【００１２】
切り粉回転抑制部により、例えば長いカール状の切り粉の場合、切り粉がスパイラル搬送部に絡みつき、スパイラル搬送部と一緒に回転することを抑制でき、切り粉の圧縮部への搬送をスムーズに行うことができる。切り粉回転抑制部としては、切り粉搬送部の軸線方向にほぼ平行なレール状の凸部を排出助成部の切り粉搬送部側の端部に形成すれば、切り粉の回転を効果的に抑制できる。
【００１３】
一方、上記スパイラル搬送部（切り粉搬送部）の搬送条部の螺旋ピッチを、当該スパイラル搬送部の搬送条部の外径よりも大きくすることができる。この場合、スパイラル搬送部の搬送条部の外周で、切り粉が支持されにくくなり、搬送条部間に形成された凹部内に切り粉が入り込みやすくなり、切り粉の圧縮部への搬送を効率よく行うことができるようになる。なお、搬送条部の螺旋ピッチは、スパイラル搬送部の搬送条部の外径に対して約１．１〜２．０倍程度、望ましくは約１．２〜１．５倍程度にするのがよい。また、排出助成部に対し上述の撹拌部と切り粉回転抑制部とを併せ設けることで、切り粉を押し込み、撹拌し、さらに連れ回りを抑制するという３重の相乗効果により、切り粉の圧縮部への搬送を円滑に行うことができる。ただし、排出助成部に対し上述の撹拌部と切り粉回転抑制部とのいずれか一方を設けるだけでも、撹拌助成部と撹拌部又は撹拌助成部と切り粉回転抑制部との２重の相乗効果は奏される。さらに、スパイラル搬送部の螺旋ピッチをその搬送部の外径より大きくすることは、上述の切り粉回転抑制部との組合せ、撹拌部との組合せ、さらに切り粉回転抑制部及び撹拌部との組合せとしても、いずれも成立する。
【００１４】
【発明の実施の形態】
以下、本発明の実施の形態を図面に示す実施例に基づき説明する。
（実施例１）
図１は本発明の一実施例たる切り粉圧縮機１００の側面図であり、図２はその平面図である。切り粉を蓄えるホッパ１は、切り粉を内部に導入するための切り粉導入口１ａを有し、その切り粉導入口１ａ側から、切り粉が順次排出される底１ｂ側に向けてその内周面が縮径したテーパ状の形態を有している。ホッパ１の底１ｂ側には、切り粉搬送部としてのスパイラルスクリュー４が設けられている。ホッパ１には押し込み部材（排出助成部）２が往復移動（スライド）自在に取り付けられており、押し込み部材２の押し込み方向の端面２ａには、切り粉撹拌用の突起状部分としての爪部３（撹拌部）が、ホッパ１の切り粉導入口１ａ側に反り返った爪状に設けられている。ホッパ１にはカバー５０が取り付けられ、カバー５０は、図のように斜め上方に上がった状態（待機状態）の押し込み部材２を覆う構成となっており、カバー５０の上を切り粉が滑り落ち、ホッパ１の底１ｂ側に蓄積されていく。そして、蓄えられた切り粉は順次底１ｂ側からスパイラルスクリュー４へと排出されていく。
【００１５】
押し込み部材２の構造をより詳しく説明する。ホッパ１に軸支持部材５，６を介して軸７が固定され、この軸７にボールブッシュ（移動ガイド部）８が軸方向に移動可能に嵌合され、さらにそのボールブッシュ８に固定部材２４を介して押し込み部材２が連結されている。したがって、押し込み部材２はボールブッシュ８を介して軸７によりホッパ１の内壁面に沿って斜めに移動可能である。そして、軸支持部材６を介してホッパ１に固定されたシリンダ９のピストンロッド９ａが、ボールブッシュ８又は固定部材２４に連結されていて、このシリンダ９の作動により押し込み部材２が斜め方向において上下動する仕組みとなっている。以上のような押し込み部材２のスライドに伴って、押込み部材２がホッパ１内に蓄えられた切り粉を排出側へ押し込んでブリッジの発生を防止するとともに、爪部３が切り粉を撹拌し、切り粉が底１ｂ側付近で固まることを防止している。
【００１６】
一方、ホッパ１の底１ｂ側に水平に配置されたスパイラルスクリュー４は、ギヤードモータ１３により自身の軸線周りに回転可能であり、軸状の本体部４ａの外周面に螺旋状の羽根（搬送条部）４ｂが形成され、羽根４ｂの間に切り粉を保持しつつ軸線周りに回転することにより、切り粉を軸線方向に搬送する。スパイラルスクリュー４を駆動するギヤードモータ１３はホッパ１の一側面に位置しており、ホッパ１の他の側面には、ギヤードモータ１３と対向する位置に圧縮シリンダブロック１０が取り付けられている。圧縮シリンダブロック１０には、ホッパ１から切り粉が充填される横穴１０ａと、圧縮ロッド１５がスライドする縦穴１０ｂとが設けられている。
【００１７】
圧縮シリンダブロック１０にはスペーサー１８，１９を介して油圧シリンダ２２が取り付けられている。油圧シリンダ２２は油圧ポンプ２３により駆動され、そのピストンロッド２１には、圧縮ロッド１５がジョイント１４により連結されている。この圧縮ロッド１５が上述の圧縮シリンダブロック１０の横穴１０ｂ内に嵌まり込んで切り粉を圧縮する。圧縮シリンダブロック１０の背後には、貫通孔である横穴１０ｂの後側の開口を塞ぐように開閉ブロック２７（キャビティ開閉部材）が、ガイド部材としての一対のガイドブロック１６に案内されて昇降可能に設けられ、その開閉ブロック２７により切り粉が充填されるキャビティ（横穴１０ｂ）が開閉可能とされている。開閉ブロック２７は図１３に示す油圧シリンダ２６により昇降させられ、シリンダ２６は図１４に示すフランジ部材２５を介してガイドブロック１６に固定され、そのピストンロッド２６ａが開閉ブロック２７に連結されている。圧縮された圧縮切り粉ブロック２８（図１５）を排出する際には、開閉ブロック２７が上昇し、シューター１７から排出されていく。
【００１８】
以上のような切り粉圧縮機１００のホッパ１、押し込み部材２、切り粉を圧縮シリンダブロック１０に搬送するスパイラルスクリュー４、切り粉１２を圧縮ロッド１５により圧縮して固める圧縮部等が、架台２０の上に取り付けられている。また、上述のように油圧ポンプ２３を主体とする油圧ユニットが設けられており、その油圧ポンプ２３は、３つのシリンダに共通の油圧源、すなわち押し込み部材２を斜め方向に駆動するブリッジ解消用の油圧シリンダ９、切り粉１２を押し固める圧縮用の油圧シリンダ２２、及び押し固めた切り粉の排出口を開放する油圧シリンダ２６に兼用の油圧源となっており、図示しない管路及び弁手段を経て、これらの油圧シリンダがシーケンス装置により所定のタイミングで作動する。
【００１９】
ここで、図３に示すように爪部３は、押し込み部材２の押し込み方向とは逆の方向に反り返って形成され、押し込み部材２の押し込み方向の端面２ａにおいてギヤードモータ１３側に形成されている（図７参照）。また、爪部３の、押し込み部材２の端面２ａに対する角度θ（押込み部材２の往復移動方向に直角な面に対する角度θ）は、例えば０〜８０゜位の範囲に設定するのがよい。０゜未満の角度の場合、切り粉を爪部３でとらえた後にそれが爪部３から逃げやすくなり、切り粉の撹拌を十分に行えなくなることがある。また、例えば８０゜を超えると、爪部３の切り粉を撹拌する面積が少なくなり、撹拌の効率が低下することがある。なお、上記角度範囲は望ましくは、３０〜６０゜の範囲にするのがよい。また、爪部３等の撹拌部は、図４のように圧縮シリンダブロック１０側（図７参照）に設けてもよく、さらには、図５のように押込み部材２の幅方向に所定の間隔で複数設けることも可能である。また、爪部３の反り返った爪の長さＬ2は、押し込み部材２を底１ｂ側に向けて押し込んだときにホッパ１の内周面に当たらない程度の大きさとされている。
【００２０】
ここで、爪部３を設ける位置は、例えば図７を参照すれば、Ａ位置とする場合は図３（ａ）に対応する。爪部３は押込み部材２の幅方向（切り粉搬送部の送り方向）において、圧縮部（圧縮シリンダブロック１０）から遠い側（逆に言えば切り粉搬送部のモータ１３に近い側）の押込み部材２の端部又はその近傍に設けられる。この場合は、切り粉搬送部（４）の搬送経路において、この搬送の初期段階（言い換えれば、搬送距離が最も長くなる部分）で切り粉を撹拌する作用をなす。切り粉が圧縮部（１０）から遠いところで固まると、その搬送が困難になる恐れがあるが、これを爪部３で撹拌すると、その搬送状態を復活させやすい。一方、爪部３等の撹拌部の位置を図７のＢ位置とする場合は、上記押込み部材２の幅方向において圧縮部（１０）に近い側の押込み部材２の端部又は近傍に爪部３等の撹拌部が設けられる。この場合は、切り粉搬送部（４）の搬送位置において、その搬送の終端近傍（言い換えれば搬送距離が最も短くなる部分）で切り粉を撹拌する作用をなす。切り粉が圧縮部（１０）に近いところで固まると、後続の切り粉の搬送を阻害するおそれがあり、これを爪部３等の撹拌部で撹拌して圧縮部（１０）へ送り込むことで、後続の切り粉の搬送をスムーズに行い得る。なお、図７のＡ位置とＢ位置の双方に、言い換えれば押込み部材の幅方向（切り粉搬送の送り方向）における両端部近傍に、爪部３等を撹拌部として設けることもできる。ホッパ１との関係では、その内壁に近い側は切り粉の流動性がホッパの中央部に比べて劣る場合もあるので、切り粉の滞留やブリッジ現象がより生じやすい部分に爪部３等の撹拌部を設けることは意味がある。もっとも、爪部３等の撹拌部を押込み部材２の中間部に上記幅方向の両端部に代えて、又はこれに併せて設けることもできる。
【００２１】
以下、実施例１の切り粉圧縮機の作用について図６〜図９を用いて説明する。図６は押し込み部材２が上がった状態で切り粉の排出補助を行わない待機状態を示した側面図で、図７はその正面図である。また、図８は押し込み部材２が下がった状態で切り粉の排出を補助する排出状態を示した側面図で、図９はその正面図である。図６の状態で、ホッパ１の切り粉導入口１ａから切り粉１２が投入されると、切り粉１２はカバー５０の上を滑り落ち、ホッパ１内部に蓄えられる。スパイラルスクリュー４の回転の向きは、ギヤードモータ１３側から見て反時計回りの時、圧縮シリンダブロック１０に切り粉を送る向きで、これを正転とする。このように押し込み部材２が上がった状態（待機状態）で、スパイラルスクリュー４を正転させると、導入された切り粉１２は押し込み部材２の下に寄せられる。このとき、切り粉１２は滞留してブリッジを形成することがある。
【００２２】
次に、図８のように、押し込み部材２が油圧シリンダ９により下降し、押し込み部材２は切り粉１２を押しながらスパイラルスクリュー４に排出する（排出状態）。この場合、例えば切り粉１２がホッパ１に滞留してブリッジを形成しても、押し込み部材２が上方から押すことでブリッジは崩され、切り粉１２は順次スパイラルスクリュー４に排出される。切り粉１２はスパイラルスクリュー４の羽根４ｂの間に入り込み、スパイラルスクリュー４が回転することで、圧縮シリンダブロック１０に搬送される。一方、押し込み部材２が図８の排出状態から図６の待機状態に戻るときには、爪部３が切り粉１２の一部に引っ掛かり、その切り粉１２及びそれに連れられてくる切り粉１２を伴って移動するため、切り粉１２が撹拌される。これによって切り粉１２がスパイラルスクリュー４付近に滞留あるいはその付近で押し固められることを防止できる。つまり、ブリッジを解消するために押込み部材２が切り粉１２をスパイラルスクリュー４側へ押し込んだ際、ブリッジがたまたま解消されない場合は、切り粉が押込み部材２で押し固められることとなるが、その状態でも爪部３がその復動行程で切り粉を撹拌してほぐすため、次の押込み部材２の往動行程でブリッジを解消しやすくなる。
【００２３】
スパイラルスクリュー４により圧縮シリンダブロック１０の内部に切り粉１２が充填されると、図１に示す油圧ポンプ２３を動力源として油圧シリンダ２２が作動し、圧縮ロッド１５を介して切り粉１２を圧縮し、図１５のような圧縮切り粉ブロック２８を形成する。次に開閉ブロック２７が油圧シリンダ２６によりスライド上昇し、圧縮シリンダブロック１０の横穴１０ｂの後方（排出口）を開放する。その後、圧縮シリンダ２２により圧縮ロッド１５が更に一定量伸長して、圧縮切り粉ブロック２８を排出する。排出された圧縮切り粉ブロック２８はシューター１７を滑り落ち、装置外に排出される。以上を繰り返し、ホッパ１内の切り粉１２を全て圧縮し排出する。
【００２４】
（実施例２）
図１０は、実施例２としての切り粉圧縮機の要部を示す側面図である。なお、実施例１と同じ構成のものについては同じ符号を付与し、その説明は省略する。図１０，１１及び図１６に示すように、押し込み部材２の爪部３が形成されていない端面２ａに、切り粉回転抑制部６０が設けられている。切り粉回転抑制部６０は、スパイラルスクリュー４の軸に平行で、押し込み部材２の端面２ａから突出した単一又は複数（例えば２本）のレール状に形成されている。なお、切り粉回転抑制部６０は、図１６のように爪部３等の撹拌部に近接して押込み部材２の幅方向に沿って長手状に延びるように、かつ押込み部材の先端からさらにその押し込み方向に突出するように設けることもできるが、例えば回転抑制部６０が押し込み部材２の幅方向の全部又は一部に沿って形成され、その回転抑制部と交差する形態で、その回転抑制部の一部（例えば長手方向の端部又は中間部）から側方へ突出するように爪部３等の撹拌部を設けることもできる。
【００２５】
図１０のように、押し込み部材２が下がり、排出状態となると、切り粉１２は切り粉回転抑制部６０に押さえられる状態となる。このとき、切り粉回転抑制部６０はスパイラルスクリュー４の軸に平行なレール状の凸部であるために、スパイラルスクリュー４の回転に伴って切り粉１２がスパイラルスクリュー４の軸周りに回転することを防止している。
【００２６】
（実施例３）
図１２（ａ）は、実施例３としての切り粉圧縮機の要部を示す側面図で、図１２（ｂ）は、その要部拡大図である。なお、スパイラルスクリュー４０以外は、実施例１と同じ構成であるため、同じ符号を付与し、その説明は省略する。この実施例３のスパイラルスクリュー４０は、軸状の本体部４１の外周面に螺旋状の羽根４２（搬送条部）が形成され、羽根４２の間にできた凹部４３内に切り粉１２を保持しつつ搬送する。このスパイラルスクリューの構成は実施例１及び２についても同様であるが、本実施例３のスパイラルスクリュー４０は、その羽根４２の螺旋ピッチＬ1が、羽根４２の外径Ｒ1よりも大きく構成されている。これにより、羽根４２間に形成された凹部４３内に切り粉１２が入り込みやすくなり、切り粉１２の圧縮シリンダブロック１０への搬送を効率よく行うことができるようになる。具体的には、本実施例３ではＬ1／Ｒ1＝１．４とされており、その値の範囲は約１．１〜２．０程度とするのがよく、望ましくは約１．２〜１．５倍程度にするのがよい。１．１（あるいは１．２）より小さいと切り粉が入りやすいという効果が不充分であり、２．０より大きいと切り粉に及ぼす螺旋の推進力が不足しがちになることがある。
【００２７】
なお、実施例２，３の切り粉圧縮機における切り粉回転抑制部６０は、図１６及び図１７に示すように、２本のレール状の凸部として設けられているが、その個数については１ないし複数本のものを設けることが可能であり、その形状については、スパイラルスクリュー４の軸線方向に略平行な突起を形成して、切り粉の回転を抑制するものであれば制限はない。また、その大きさにについては、押し込み方向への長さＬ4を、押し込み部材２の端面２ａからスパイラルスクリュー４までの距離Ｌ3の約１０〜７０％程度とすることが、切り粉の回転を抑制する上で好ましい。
【００２８】
また、爪部３等の撹拌部は図１８（ａ）に示すように、搬送部から遠ざかる方向（ホッパの上側）に湾曲状（例えば円弧状）に傾斜して形成してもよい。また、同図（ｂ）のように押し込み部材２と爪部３ｂ等の撹拌部とを一体に形成することもできる。この場合、上側の面３ｍは切り粉を連れ動かす役割を果たし、反対側の面３ｎは切り粉に入り込む機能があり、この面３ｎのように傾斜していることで切り粉内への進入が容易となる。さらに、同図（ｃ）、ｄ）のように上側の面３ｐが押し込み部材２の移動方向にほぼ直角であってもよい。また、同図（ｄ）〜（ｆ）のように押し込み部材２の先端が先細りの突起状に形成されて、ここが切り粉回転抑制部３ｒ，３ｓ，３ｔとされていてもよい。３ｒは押し込み部材２の爪部３ｄの先端とは反対側に位置し、３ｓ，３ｔは押し込み部材２の厚さ方向中間部に形成されたものである。また、下側の斜面３ｑ，３ｖ，３ｗ等が、切り粉への進入時の抵抗を軽減する。
【図面の簡単な説明】
【図１】本発明の実施例１の切り粉圧縮機の側面図。
【図２】図１の平面図。
【図３】図１の押し込み部材に設けられた爪部を拡大して示す斜視図及びその側面図。
【図４】爪部の変形例を示す斜視図。
【図５】同じく、爪部の変形例を示す斜視図。
【図６】実施例１の押し込み部材が上がった状態を示す部分拡大側面図。
【図７】図６の正面図。
【図８】実施例１の押し込み部材が下がった状態を示す部分拡大側面図。
【図９】図８の正面図。
【図１０】本発明の実施例２の切り粉圧縮機の要部を示す側面図。
【図１１】図１０の正面図。
【図１２】本発明の実施例３の切り粉圧縮機の要部を示す正面図。
【図１３】切り粉圧縮機の圧縮部を示す部分拡大側面図。
【図１４】同じく、切り粉圧縮機の圧縮部を示す部分拡大正面図。
【図１５】圧縮切り粉ブロックの一例を示す外観図。
【図１６】押し込み部材に設けられた切り粉回転抑制部を拡大して示す斜視図。
【図１７】切り粉回転抑制部の形状を示す説明図。
【図１８】撹拌部及び切り粉回転抑制部のさらに幾つかの変形例を示す図。
【符号の説明】
１ホッパ
１ｂホッパの底側
２押し込み部材（排出助成部）
３爪部（撹拌部）
４，４０スパイラルスクリュー（切り粉搬送部）
１０圧縮シリンダブロック（圧縮部）
１２切り粉
４１切り粉搬送部の本体部
４２搬送条部
４３凹部
Ｌ1 搬送条部の螺旋ピッチ
Ｒ1 切り粉搬送部の外径[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chip compressor that compresses and hardens chip generated from a machine tool such as a lathe, a milling machine, or a drilling machine.
[0002]
[Prior art]
When a metal material or the like is cut by a machine tool such as a lathe, a milling machine, or a drilling machine, chips are generated as cutting waste. A chip compressor is known as an apparatus for hardening a certain amount of chips when reusing such chips. As such a chip compressor, what is equipped with the hopper which discharges | emits a chip | tip sequentially after storing a chip | tip, and the compression apparatus for hardening a chip | tip is known. In addition, in some chip compressors, one or a plurality of spiral screws (chip transporting units) are provided as devices for sending the chips discharged from the hopper to the compression device.
[0003]
In the chip compressor as described above, for example, depending on the shape of the chip, the chip may stay above the spiral screw to form a bridge, and the chip may not be discharged to the compression device. For this reason, the present applicant has developed a technique for disintegrating the bridge by providing a discharge subsidy section that assists discharge by pushing the chips in the discharge direction and has applied for a patent.
[0004]
[Problems to be solved by the invention]
However, it has been found that there is a further problem to be solved in the chip compressor having the discharge assisting section. For example, when curl-like swarf is put in a hopper to the full, the swarf is solidified in the vicinity of the spiral screw in the hopper during the process, and even if the swarf is pressed by the discharge aid, There is a case where the amount of the swarf conveyed to the compression device does not enter between the screw strips (blades) of the spiral screw and is reduced to about 1/5 to 1/4 of the initial stage of the processing.
[0005]
Further, in the case of long curled swarf, the swarf is entangled with the spiral screw and rotates together with the spiral screw, so that the amount of transport of the swarf to the compression device may be reduced. In addition, the outer periphery of the screw strip of the spiral screw supports the weight of the chip and the pressing force from the discharge subsidy unit, so that the chip does not enter between the screw strips, and the amount of chips transported to the compression device is small. Sometimes.
[0006]
The subject of this invention is improving the said problem and providing the chip compressor which can send all the chips stored in the hopper efficiently to a compression apparatus.
[0007]
[Means for Solving the Problems and Effects of the Invention]
The present invention temporarily stores chips and a hopper from which the chips are discharged from the bottom side;
A discharge assisting unit that is installed in the hopper and assists the discharge by pushing the chips to the bottom side when the chips stored in the hopper are discharged from the bottom side;
A swarf transport unit that is formed on the bottom side of the hopper and transports the swarf discharged from the hopper;
Has a compression part to solidify by compressing the cutting powder that has been conveyed by the cutting powder conveying section,
The discharge assisting portion is incorporated so as to be reciprocally movable along the inner wall surface of the hopper, and approaches the bottom of the hopper obliquely from above so as to push the chips and assist the discharge of the chips. The state and a standby state in which chips are introduced into the hopper without discharging assistance are periodically repeated,
Furthermore, the prior Symbol discharge grant section, the stirring section for stirring the cutting powder stored in the hopper is provided, the stirring unit, the transition to the standby state from the discharge state of the discharge subsidized portion Along with this, there is a surface or a part that moves along with a part of the chips, and stirring is mainly performed based on the forced movement of the chips .
[0008]
As described above, by providing the discharge subsidy part and the stirring part, it is difficult to form a bridge of chips due to the operation of pushing the chips of the discharge subsidy part, and the stirring part stirs the chips. It is possible to prevent the chips from being hardened in the vicinity of the chip conveying section and to avoid a decrease in the amount of chips conveyed to the compression section.
[0010]
In addition, a discharge assisting part is assembled so as to be reciprocally movable along the inner wall surface of the hopper, and is slid toward the bottom of the hopper, for example, obliquely from above, thereby discharging the chips while pushing the chips, It shall periodically repeat the standby state in which chips are introduced into the hopper without discharging assistance, and
The said stirring part can be set as the structure which stirs swarf in connection with the transfer from the discharge | emission state of a discharge assistance part to a standby state. As described above, when the discharge assisting portion is periodically slid, the effect of eliminating the bridge of chips becomes high.
[0011]
In addition, as a chip conveying unit, a spiral conveying strip is formed on the outer peripheral surface of the shaft-shaped main body, and while holding the chip in a recess formed between the conveying strips, around its own axis By adopting a spiral conveyance unit that conveys the swarf in the axial direction,
In the discharge subsidy unit, when the discharge subsidy unit presses the chips toward the bottom of the hopper to assist the discharge, the chips rotate with the rotation around the axis of the spiral transfer unit (chip transfer unit). It is possible to provide a swarf rotation suppressing portion that prevents the
[0012]
For example, in the case of long curled swarf, the swarf rotation suppression unit can prevent the swarf from getting entangled with the spiral conveyance unit and rotating together with the spiral conveyance unit, thereby smoothly conveying the swarf to the compression unit. It can be carried out. As a chip rotation suppression part, if a rail-shaped convex part approximately parallel to the axial direction of the chip conveying part is formed at the end of the discharge assisting part on the side of the chip conveying part, the rotation of the chip can be effectively performed. Can be suppressed.
[0013]
On the other hand, the spiral pitch of the conveying strip of the spiral conveying unit (chip conveying unit) can be made larger than the outer diameter of the conveying strip of the spiral conveying unit. In this case, it becomes difficult for the chips to be supported on the outer periphery of the conveying strip of the spiral conveying section, and it becomes easier for the chips to enter into the recesses formed between the conveying strips, thereby efficiently transporting the chips to the compression section. You can do well. The helical pitch of the conveying strip is about 1.1 to 2.0 times, preferably about 1.2 to 1.5 times the outer diameter of the conveying strip of the spiral conveying unit. Good. In addition, by providing the above-mentioned agitation unit and the chip rotation suppression unit together with the discharge subsidy unit, the chip is pressed, stirred, and further, the chip is compressed by a triple synergistic effect of suppressing the accompanying rotation. The conveyance to the part can be performed smoothly. However, the double synergistic effect of the stirring assisting portion and the stirring portion or the stirring assisting portion and the chip rotation suppressing portion is provided only by providing any one of the stirring portion and the chip rotation suppressing portion described above with respect to the discharge assisting portion. Is played. Furthermore, making the spiral pitch of the spiral conveying part larger than the outer diameter of the conveying part is a combination with the above-described chip rotation suppressing part, a combination with the stirring part, and a combination with the chip rotation suppressing part and the stirring part. However, both hold true.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings.
Example 1
FIG. 1 is a side view of a chip compressor 100 according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. The hopper 1 for storing the chips has a chip introduction port 1a for introducing the chips into the inside, from the chip introduction port 1a side toward the bottom 1b side where the chips are sequentially discharged. The peripheral surface has a tapered shape with a reduced diameter. On the bottom 1b side of the hopper 1, a spiral screw 4 is provided as a chip conveying unit. A pushing member (discharge assisting portion) 2 is attached to the hopper 1 so as to be freely reciprocated (slidable), and a claw portion 3 as a protruding portion for stirring chips is provided on an end surface 2 a in the pushing direction of the pushing member 2. The (stirring portion) is provided in a claw shape that warps toward the chip introduction port 1a side of the hopper 1. A cover 50 is attached to the hopper 1, and the cover 50 is configured to cover the pushing member 2 in a state where the cover 50 is lifted obliquely upward (standby state) as shown in the figure, and the chips fall on the cover 50. , Accumulated on the bottom 1b side of the hopper 1. The stored chips are sequentially discharged from the bottom 1b side to the spiral screw 4.
[0015]
The structure of the pushing member 2 will be described in more detail. A shaft 7 is fixed to the hopper 1 via shaft support members 5, 6, and a ball bush (moving guide portion) 8 is fitted to the shaft 7 so as to be movable in the axial direction. The push-in member 2 is connected via Therefore, the push-in member 2 can be moved obliquely along the inner wall surface of the hopper 1 by the shaft 7 via the ball bush 8. The piston rod 9a of the cylinder 9 fixed to the hopper 1 via the shaft support member 6 is connected to the ball bush 8 or the fixing member 24, and the pushing member 2 moves up and down in the oblique direction by the operation of the cylinder 9. It is a moving mechanism. Along with the sliding of the pushing member 2 as described above, the pushing member 2 pushes the swarf stored in the hopper 1 to the discharge side to prevent generation of a bridge, and the claw portion 3 stirs the swarf, It prevents the chips from hardening near the bottom 1b side.
[0016]
On the other hand, the spiral screw 4 disposed horizontally on the bottom 1b side of the hopper 1 can be rotated around its own axis by a geared motor 13, and spiral blades (conveying strips) are formed on the outer peripheral surface of the shaft-shaped main body 4a. Part) 4b is formed, and the chips are conveyed in the axial direction by rotating around the axis while holding the chips between the blades 4b. The geared motor 13 for driving the spiral screw 4 is located on one side of the hopper 1, and the compression cylinder block 10 is attached to the other side of the hopper 1 at a position facing the geared motor 13. The compression cylinder block 10 is provided with a horizontal hole 10a filled with chips from the hopper 1 and a vertical hole 10b through which the compression rod 15 slides.
[0017]
A hydraulic cylinder 22 is attached to the compression cylinder block 10 via spacers 18 and 19. The hydraulic cylinder 22 is driven by a hydraulic pump 23, and a compression rod 15 is connected to the piston rod 21 by a joint 14. The compression rod 15 is fitted into the horizontal hole 10b of the compression cylinder block 10 to compress the chips. Behind the compression cylinder block 10, an opening / closing block 27 (cavity opening / closing member) is guided by a pair of guide blocks 16 as guide members so as to be able to move up and down so as to close the opening on the rear side of the through hole 10b which is a through hole. A cavity (lateral hole 10b) that is provided and that is filled with chips by the opening and closing block 27 can be opened and closed. The open / close block 27 is moved up and down by a hydraulic cylinder 26 shown in FIG. 13. The cylinder 26 is fixed to the guide block 16 via a flange member 25 shown in FIG. 14, and its piston rod 26 a is connected to the open / close block 27. When the compressed compressed chip block 28 (FIG. 15) is discharged, the open / close block 27 is raised and discharged from the shooter 17.
[0018]
The hopper 1, the push-in member 2, the spiral screw 4 that conveys the chips to the compression cylinder block 10, the compression unit that compresses and solidifies the chips 12 with the compression rod 15, and the like of the chip compressor 100 as described above. Is mounted on top. Further, as described above, the hydraulic unit mainly including the hydraulic pump 23 is provided, and the hydraulic pump 23 is used for eliminating the bridge that drives the hydraulic source common to the three cylinders, that is, the pushing member 2 in an oblique direction. The hydraulic cylinder 9, the compression hydraulic cylinder 22 that compresses and compacts the chips 12, and the hydraulic cylinder 26 that opens the discharge port for the compacted chips and serves as a hydraulic pressure source, and a conduit and valve means (not shown) are provided. After that, these hydraulic cylinders are operated at a predetermined timing by the sequence device.
[0019]
Here, as shown in FIG. 3, the claw portion 3 is formed to bend in the direction opposite to the pushing direction of the pushing member 2, and is formed on the geared motor 13 side on the end surface 2 a in the pushing direction of the pushing member 2. (See FIG. 7). Further, the angle θ of the claw portion 3 with respect to the end surface 2a of the pushing member 2 (angle θ with respect to the plane perpendicular to the reciprocating direction of the pushing member 2) is preferably set in the range of, for example, 0 to 80 °. When the angle is less than 0 °, it becomes easier for the chips to escape from the nail part 3 after the chips are caught by the nail part 3 and the stirring of the chips may not be sufficiently performed. For example, when it exceeds 80 degrees, the area which stirs the chip of the nail | claw part 3 decreases, and the efficiency of stirring may fall. The angle range is preferably in the range of 30 to 60 °. Further, the stirring portion such as the claw portion 3 may be provided on the compression cylinder block 10 side (see FIG. 7) as shown in FIG. 4, and further, a predetermined interval in the width direction of the pushing member 2 as shown in FIG. It is also possible to provide a plurality. Further, the length L2 of the nail that the nail portion 3 is warped is set to a size that does not hit the inner peripheral surface of the hopper 1 when the pushing member 2 is pushed toward the bottom 1b.
[0020]
Here, for example, referring to FIG. 7, the position where the claw portion 3 is provided corresponds to FIG. The claw portion 3 is pushed in on the side farther from the compression portion (compression cylinder block 10) in the width direction of the pushing member 2 (feed direction of the chip conveying portion) (in other words, on the side closer to the motor 13 of the chip conveying portion). It is provided at the end of the member 2 or in the vicinity thereof. In this case, in the transport path of the chip transport section (4), the chip is stirred at the initial stage of transport (in other words, the portion where the transport distance is the longest). If the chips are hardened away from the compression unit (10), the conveyance may be difficult. However, if the chips are stirred by the claw unit 3, the conveyance state is easily restored. On the other hand, when the position of the stirring portion such as the claw portion 3 is set to the position B in FIG. 7, the claw portion is located at the end portion or in the vicinity of the pushing member 2 on the side close to the compression portion (10) in the width direction of the pushing member 2. A stirrer such as 3 is provided. In this case, the chip is agitated in the vicinity of the end of the conveyance (in other words, the portion where the conveyance distance is the shortest) at the conveyance position of the chip conveyance unit (4). When the chips are solidified near the compression part (10), there is a risk of hindering the conveyance of the subsequent chips, and this is stirred by a stirring part such as the claw part 3 and sent to the compression part (10). Subsequent chips can be conveyed smoothly. In addition, the nail | claw part 3 grade | etc., Can also be provided in both the A position and B position of FIG. 7, ie, the both ends vicinity in the width direction (feed direction of chip conveyance) of a pushing member. In relation to the hopper 1, the fluidity of the chips may be inferior to that of the central part of the hopper on the side close to the inner wall. It is meaningful to provide a stirring part. However, a stirring portion such as the claw portion 3 may be provided in the middle portion of the pushing member 2 instead of or in addition to the both end portions in the width direction.
[0021]
Hereinafter, the effect | action of the chip compressor of Example 1 is demonstrated using FIGS. FIG. 6 is a side view showing a standby state in which the discharge of the swarf is not performed with the pushing member 2 raised, and FIG. 7 is a front view thereof. FIG. 8 is a side view showing a discharge state for assisting the discharge of chips in a state where the pushing member 2 is lowered, and FIG. 9 is a front view thereof. In the state of FIG. 6, when the chips 12 are introduced from the chip introduction port 1 a of the hopper 1, the chips 12 slide down on the cover 50 and are stored in the hopper 1. The direction of rotation of the spiral screw 4 is the direction in which chips are fed to the compression cylinder block 10 when viewed counterclockwise when viewed from the geared motor 13 side, and this is assumed to be normal rotation. In this way, when the spiral screw 4 is rotated forward with the pushing member 2 raised (standby state), the introduced chips 12 are brought under the pushing member 2. At this time, the chips 12 may stay and form a bridge.
[0022]
Next, as shown in FIG. 8, the pushing member 2 is lowered by the hydraulic cylinder 9, and the pushing member 2 is discharged to the spiral screw 4 while pushing the chips 12 (discharge state). In this case, for example, even if the chips 12 stay in the hopper 1 to form a bridge, the bridge is broken when the pushing member 2 is pushed from above, and the chips 12 are sequentially discharged to the spiral screw 4. The swarf 12 enters between the blades 4 b of the spiral screw 4, and is conveyed to the compression cylinder block 10 as the spiral screw 4 rotates. On the other hand, when the pushing member 2 returns from the discharge state of FIG. 8 to the standby state of FIG. 6, the claw portion 3 is caught by a part of the cutting powder 12, and the cutting powder 12 and the cutting powder 12 brought along with it. In order to move, the chips 12 are agitated. As a result, it is possible to prevent the chips 12 from staying in the vicinity of the spiral screw 4 or being pressed and hardened there. That is, when the pushing member 2 pushes the chips 12 toward the spiral screw 4 in order to eliminate the bridge, if the bridge does not happen to disappear, the chips are pressed and solidified by the pushing member 2. However, since the nail | claw part 3 stirs and loosens a chip | tip in the reciprocation process, it becomes easy to eliminate a bridge | bridging by the forward movement process of the following pushing member 2. FIG.
[0023]
When the chips 12 are filled into the compression cylinder block 10 by the spiral screw 4, the hydraulic cylinder 22 is operated using the hydraulic pump 23 shown in FIG. 1 as a power source, and the chips 12 are compressed via the compression rod 15. The compressed chip block 28 as shown in FIG. 15 is formed. Next, the open / close block 27 is slid up by the hydraulic cylinder 26 to open the rear side (discharge port) of the horizontal hole 10 b of the compression cylinder block 10. Thereafter, the compression rod 15 is further extended by a certain amount by the compression cylinder 22, and the compressed chip block 28 is discharged. The discharged compressed chip block 28 slides down the shooter 17 and is discharged out of the apparatus. The above is repeated, and all the chips 12 in the hopper 1 are compressed and discharged.
[0024]
(Example 2)
FIG. 10 is a side view showing a main part of the chip compressor as the second embodiment. In addition, the same code | symbol is provided about the thing of the same structure as Example 1, and the description is abbreviate | omitted. As shown in FIGS. 10, 11 and 16, a chip rotation suppression portion 60 is provided on the end surface 2 a where the claw portion 3 of the pushing member 2 is not formed. The chip rotation suppression unit 60 is formed in a single or plural (for example, two) rail shape that is parallel to the axis of the spiral screw 4 and protrudes from the end surface 2 a of the pushing member 2. As shown in FIG. 16, the chip rotation suppression unit 60 extends in the longitudinal direction along the width direction of the pressing member 2 in the vicinity of the stirring unit such as the claw unit 3 and further from the tip of the pressing member. Although it can also be provided so as to protrude in the pushing direction, for example, the rotation suppressing part 60 is formed along all or part of the width direction of the pushing member 2 and intersects with the rotation suppressing part. A stirring portion such as the claw portion 3 can be provided so as to protrude from a part (for example, an end portion or an intermediate portion in the longitudinal direction) to the side.
[0025]
As shown in FIG. 10, when the push-in member 2 is lowered and is in a discharged state, the chips 12 are pressed by the chip rotation suppression unit 60. At this time, since the chip rotation suppression unit 60 is a rail-shaped convex part parallel to the axis of the spiral screw 4, the chip 12 rotates around the axis of the spiral screw 4 as the spiral screw 4 rotates. Is preventing.
[0026]
(Example 3)
Fig.12 (a) is a side view which shows the principal part of the chip compressor as Example 3, FIG.12 (b) is the principal part enlarged view. In addition, since it is the same structure as Example 1 except the spiral screw 40, the same code | symbol is provided and the description is abbreviate | omitted. In the spiral screw 40 according to the third embodiment, spiral blades 42 (conveying strips) are formed on the outer peripheral surface of the shaft-shaped main body 41, and the chips 12 are held in the recesses 43 formed between the blades 42. While transporting. The configuration of the spiral screw is the same as in the first and second embodiments, but the spiral screw 40 of the third embodiment is configured such that the spiral pitch L1 of the blades 42 is larger than the outer diameter R1 of the blades 42. . As a result, the chips 12 can easily enter the recesses 43 formed between the blades 42, and the chips 12 can be efficiently conveyed to the compression cylinder block 10. Specifically, in the third embodiment, L1 / R1 = 1.4, and the range of the value is preferably about 1.1 to 2.0, and preferably about 1.2 to 1. It should be about 5 times. If it is smaller than 1.1 (or 1.2), the effect that chips are likely to enter is insufficient, and if it is larger than 2.0, the propulsive force of the spiral exerted on the chips tends to be insufficient.
[0027]
In addition, as shown in FIG.16 and FIG.17, although the chip rotation suppression part 60 in the chip compressor of Example 2, 3 is provided as two rail-shaped convex parts, about the number One or more can be provided, and the shape is not limited as long as a protrusion substantially parallel to the axial direction of the spiral screw 4 is formed to suppress the rotation of the chips. Further, regarding the size, the length L4 in the pushing direction is set to about 10 to 70% of the distance L3 from the end surface 2a of the pushing member 2 to the spiral screw 4 to suppress the rotation of the chips. This is preferable.
[0028]
Further, as shown in FIG. 18A, the stirring unit such as the claw unit 3 may be formed to be inclined in a curved shape (for example, an arc shape) in a direction away from the transport unit (upper side of the hopper). Further, as shown in FIG. 2B, the pushing member 2 and the stirring portion such as the claw portion 3b can be integrally formed. In this case, the upper surface 3m plays the role of moving the chips, and the opposite surface 3n has a function of entering the chips. It becomes easy. Furthermore, the upper surface 3p may be substantially perpendicular to the moving direction of the pushing member 2 as shown in FIGS. Further, as shown in FIGS. 5D to 5F, the tip of the push-in member 2 may be formed in a tapered projection shape, which may be the chip rotation suppression portions 3r, 3s, and 3t. 3r is located on the opposite side of the tip of the claw portion 3d of the pushing member 2, and 3s and 3t are formed in the middle portion of the pushing member 2 in the thickness direction. Also, the lower slopes 3q, 3v, 3w, etc. reduce the resistance when entering the chips.
[Brief description of the drawings]
FIG. 1 is a side view of a chip compressor according to a first embodiment of the present invention.
FIG. 2 is a plan view of FIG.
3 is an enlarged perspective view showing a claw portion provided on the push-in member in FIG. 1, and a side view thereof. FIG.
FIG. 4 is a perspective view showing a modification of the claw portion.
FIG. 5 is a perspective view showing a modified example of the claw portion.
FIG. 6 is a partially enlarged side view showing a state in which the pushing member of Example 1 is raised.
7 is a front view of FIG. 6. FIG.
FIG. 8 is a partially enlarged side view showing a state in which the pushing member of Example 1 is lowered.
9 is a front view of FIG. 8. FIG.
FIG. 10 is a side view showing a main part of a chip compressor according to a second embodiment of the present invention.
11 is a front view of FIG.
FIG. 12 is a front view showing a main part of a chip compressor according to a third embodiment of the present invention.
FIG. 13 is a partially enlarged side view showing a compression part of a chip compressor.
FIG. 14 is a partially enlarged front view showing the compression part of the chip compressor in the same manner.
FIG. 15 is an external view showing an example of a compressed chip block.
FIG. 16 is an enlarged perspective view showing a chip rotation suppression portion provided on the pushing member.
FIG. 17 is an explanatory view showing the shape of a chip rotation suppression unit.
FIGS. 18A and 18B are diagrams showing some further modifications of the stirring unit and the chip rotation suppression unit. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hopper 1b Bottom side of hopper 2 Pushing member (discharge assistance part)
3 Nail part (stirring part)
4,40 Spiral screw (Chip transport part)
10 Compression cylinder block (compression part)
12 Chip 41 Main body 42 of chip conveying section Conveying strip 43 Depression L1 Spiral pitch R1 of conveying strip R1 Outer diameter of chip conveying section

Claims

A hopper for temporarily storing the chips and discharging the chips from the bottom side;
A discharge assisting unit that is installed in the hopper and assists the discharge by pushing the chips to the bottom side when the chips stored in the hopper are discharged from the bottom side;
A swarf transport unit that is formed on the bottom side of the hopper and transports the swarf discharged from the hopper;
Has a compression part to solidify by compressing the cutting powder that has been conveyed by the cutting powder conveying section,
The discharge assisting portion is incorporated so as to be reciprocally movable along the inner wall surface of the hopper, and approaches the bottom of the hopper obliquely from above so as to push the chips and assist the discharge of the chips. The state and a standby state in which chips are introduced into the hopper without discharging assistance are periodically repeated,
Furthermore, the prior Symbol discharge grant section, the stirring section for stirring the cutting powder stored in the hopper is provided, the stirring unit, the transition to the standby state from the discharge state of the discharge subsidized portion A chip compressor having a surface or a portion to be moved along with a part of the chips and performing stirring mainly based on the forced movement of the chips.

The chip conveying section is formed with a spiral conveying strip on the outer peripheral surface of the shaft-shaped main body, and holds the chip in a recess formed between the conveying strips, while rotating around its own axis. Is a spiral transport unit that transports the chips in the axial direction by rotating to
When the discharge assisting unit pushes the swarf toward the bottom of the hopper to assist the discharge, the swarf rotates along with the rotation around the axis of the spiral transport unit. The chip compressor according to claim 1 , further comprising a chip rotation suppression unit that prevents the chip from rotating.

A hopper for temporarily storing the chips and discharging the chips from the bottom side;
A discharge assisting unit that is installed in the hopper and assists the discharge by pushing the chips to the bottom side when the chips stored in the hopper are discharged from the bottom side;
A swarf transport unit that is formed on the bottom side of the hopper and transports the swarf discharged from the hopper;
Has a compression part to solidify by compressing the cutting powder that has been conveyed by the cutting powder conveying section,
The chip conveying section is formed with a spiral conveying strip on the outer peripheral surface of the shaft-shaped main body, and holds the chip in a recess formed between the conveying strips, while rotating around its own axis. Is a spiral transport unit that transports the chips in the axial direction by rotating to
When the discharge assisting unit pushes the swarf toward the bottom of the hopper to assist the discharge, the swarf rotates along with the rotation around the axis of the spiral transport unit. A chip compressor comprising a chip rotation suppression unit that prevents the chip from rotating.

The cut powder rotation suppressing unit according to claim 2 or 3 wherein the one in which the convex portion shaped substantially parallel rails in the axial direction of the spiral conveyor section is formed in an end portion of the spiral conveyor portion side of the discharge subsidized portion swarf compressor according to.

The helical pitch of the conveying strip portions of the spiral conveying portion, chips compressor according to any one of claims 2 larger than the outer diameter of the conveying strip portion of the spiral conveyor 4.