JP3741970B2 - Winding structure of shielding sheet - Google Patents

Winding structure of shielding sheet Download PDF

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Publication number
JP3741970B2
JP3741970B2 JP2001126813A JP2001126813A JP3741970B2 JP 3741970 B2 JP3741970 B2 JP 3741970B2 JP 2001126813 A JP2001126813 A JP 2001126813A JP 2001126813 A JP2001126813 A JP 2001126813A JP 3741970 B2 JP3741970 B2 JP 3741970B2
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Prior art keywords
winding
force
sheet
slide board
chain
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JP2002321137A (en
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國雄 後藤
義一 市田
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株式会社中野
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Description

【0001】
【発明の属する技術分野】
本発明は、マシニングセンタ等の工作機械におけるワーク台と先端にスピンドルを設けた工作部の間に配設し、ワーク加工時に工作部側へのクーラント、切屑、切粉等の飛散付着を阻止する遮蔽シートの巻取構造に関する。
【0002】
【従来の技術】
従来、ワークを切削加工する工作機械等の加工ユニットはワーク台に対し先端にスピンドルを設けた工作部が進退自在に配設されており、かかる加工ユニットのワーク加工時に発生する切粉、クーラント等はその周辺一面に飛散するため、作業環境が悪化する欠点を有し、而も飛散した切粉の一部は工作部に付着するため、故障が発生し易い欠点を有していた。
【0003】
そこで、進退自在なる工作部用の出没孔を設けた隔壁をワーク台と工作部の間に配設することにより、工作機械本体への飛散付着を阻止する様に成しており、かかる隔壁は工作部の上下移動および左右移動に対応する移動構成が必要であった。
その一例として、特許第2963315号公報に見られる様に、左右一対の横スライドカバーの中央部にスピンドルヘッドを挿通する縦スライドカバーを取付けた工作機械用スライドカバー装置が開発される一方、横スライドカバーをシートと成した保護カバーも開発されている。
【0004】
このシート保護カバーの構成としては、スピンドルヘッドを挿通するスライドボードの両側に一対のシートを連結すると共に、該シートの両側端をスピンドルヘッドの両側移動端に設けた一対の第1、第2巻取ドラムで巻取るものである。
第1、第2巻取ドラムには巻取力を有するスプリングを内装して、シートを常時、引張して巻取る様にしており、スピンドルヘッドの左右移動に応じて、第1、第2巻取ドラムの一方は巻き取り、他方は巻き戻しを行って、シートを常時、緩みの無い様に張設していた。
【0005】
【発明が解決しようとする課題】
上記構成のシート巻取構造は第1、第2巻取ドラムにスプリングを内装しているために、継続使用、金属疲労で巻取力が低下したり、切粉等の付着で故障したり、工作機械の高速化に対して巻取速度が不足する課題を有していた。
【0006】
【課題を解決するための手段】
本発明は、上記従来技術に基づく、巻取ドラムに内装したスプリングによる巻取方式では故障したり、巻取力、巻取速度が不足する課題に鑑み、スピンドルヘッドと連動するスライドボードの両側にシートを連結すると共に、該シートの両側を回転自在な一対の巻取ドラムに巻き取り、巻取ドラムに取付けたスプロケットホイールに無端状のチェーンを巻回することによって、スライドボードの移動に連動して、一方のシートが移動すると共に、一方の巻取ドラムにおけるシートの引き出し力(巻き戻し状態)がチェーンを介して他方の巻取ドラムにおける巻き取り力となって、高速でも長期安定してシートを張設する。 又、チェーンの主動側および従動側の平行2本の直線部に伸縮可能で引張力を有する引張部材を夫々介在設置すると共に、巻取ドラムに巻き取り力を付与する主動側の引張部材の引張力を従動側の引張部材の引張力より大きくすることによって、両方の巻取ドラムに巻き取り力を付与してスライドボード両側のシートを、緩みが無く、ピンと張った状態に張設する様にして、上記課題を解決する。
【0007】
【発明の実施の形態】
以下、本発明の一実施例を図面に基づいて説明する。
図1、2に示す様に、中央のスライドボード1の所要位置に工作機械のスピンドルヘッド2を挿通させるツール出没孔3を開口し、スライドボード1の左右両側に一対のシート4、5を連結し、該シート4、5の両側端をスライドボード1の両側移動端に設けた一対の巻取ドラム6、7に数回巻きで巻き取っている。
尚、スピンドルヘッド2を挿通するスライドボード1は、図1、2の実施例のものでは、上下移動(Y軸移動)せず、左右(X軸)方向の1軸方向移動だけのものと成しているが、図6に示す実施例の様に、上下左右(XY軸)移動のものにも本発明は勿論適用され、又スライドボード1とスピンドルヘッド2は連動すれば、両者の連結構成は直接連結、間接連結を問わない。
【0008】
図1、2に示す様に、一対の巻取ドラム6、7はスライドボード1の移動方向両側端部に設置された巻取ケース8、9内に回転自在に内装され、巻取ドラム6、7の上端から突出させた連結軸10、11にスプロケットホイール12、13を取付けると共に、該スプロケットホイール12、13に無端長円状のチェーン14を巻回させている。
両側一対のスプロケットホイール12、13間におけるチェーン14の平行2本の直線部15、16は、その機能から主動側と従動側のものに区別され、作用の欄で後述する様に、スライドボード1の移動で走行するチェーン14において、シート巻き取り力となる駆動力を伝達する図2中、後方の直線部15が主動側のものである。 詳細には、スライドボード1の移動力がシート4(作用説明と同様に一方向のみ記載)の移動力となり、シート4の移動力が巻取ドラム6およびスプロケットホイール 12 の回転力となり、スプロケットホイール 12 の回転力が後方の主動側の直線部 15 のチェーン 14 の移動力となり、主動側の直線部 15 のチェーン 14 の移動力がスプロケットホイール 13 および巻取ドラム7の回転力となり、巻取ドラム7の回転力がシート5のシート巻き取り力となり、チェーン 14 における後方の主動側の直線部 15 は、スライドボード1の移動力がシート巻き取り力となる駆動力を伝達する。
【0009】
チェーン14の平行2本の直線部15、16には引張部材17、18を介在設置し、該引張部材17、18で直線部15、16の分断端19、19a 、20、20a を夫々、引張部材17、18の方向に引張している。
チェーン14における平行2本の直線部15、16において、前述の通り、後方の直線部15は主動側のもの、前方の直線部16は従動側のものであり、主動側の直線部15及び従動側の直線部16に介在設置した一対の引張部材17、18の引張力は主動側(図中、後方)のもの(引張部材17)を強くしている。
引張部材17、18としては、伸縮可能で引張力を有すればその構成を問わず、例えば、引張コイルばねでも良く、実施例ではダンパーを採用しており、図3に示す様に、シリンダー21内にピストン22、圧縮コイルばね23を内装し、ピストン22に連結したロッド24をシリンダー21から突出させ、圧縮コイルばね23がピストン22を押圧して、ロッド24をシリンダー21内に引き込む様にし、シリンダー21とロッド24の両端で引張力を有する様にしている。
【0010】
次に本発明に係る遮蔽シートの巻取構造の作用について説明する。
例えば、図5に示す様に、一点鎖線及び実線の白抜太矢(1) で表示する様に、左側へスピンドルヘッド2及びスライドボード1が連動同時移動する場合には、白抜太矢(2) で表示する様に、スライドボード1の左方移動力で右側のシート4を引張し、右側の巻取ドラム6からシート4を引き出す様に巻き戻し、白抜太矢(3) で表示する様に、巻取ドラム6の回転と同期してスプロケットホイール12が時計回りに回転し、チェーン14の後方主動側の直線部15は右方向(シート4と逆方向)へ走行する(白抜太矢(4) (5) (6) 参照、直線部15に介在設置した引張部材17の作用は後述する)。
【0011】
チェーン14における主動側の直線部15の右方向への走行に伴って、矢印(7) で表示する様に、左側のスプロケットホイール13を時計回り(右側のスプロケットホイール12と同一方向)に回転させ、スプロケットホイール13の回転に連動する巻取ドラム7で左側のシート5が巻き取られると共に、左側へ移動し(矢印(8) 参照)、同時に矢印(9) (11)で表示する様に、チェーン14の従動側の直線部16は左方向(スライドボード1と同方向で、主動側の直線部15とは逆方向)へ走行する。
【0012】
上記の様に、工作機械のスピンドルヘッド2の移動はスライドボード1、右側のシート4、巻取ドラム6、上方のチェーン14の直線部15、左側の巻取ドラム7、シート5に伝達し、スライドボード1両側のシート4、5を一対の巻取ドラム6、7で巻き戻し(引き出し)、巻き取りを行い、駆動力伝達路であるチェーン14の直線部15、16の中間に配置され、白抜太矢(5) 及び矢印(10)で表示する引張部材17、18は、スライドボード1両側のシート4、5をピンと張ったり、一対の巻取ドラム6、7の径差を解消する。
尚、一対の巻取ドラム6、7の径差とは、スライドボード1が中央に位置する時には、両側一対の巻取ドラム6、7におけるシート4、5の巻き数が同一で直径も同一であるが、巻き取り、巻き戻しに応じて、シート4、5の厚さが増加、減少することにより発生するものである。
【0013】
次に、伸縮可能な2個の引張部材17、18は引張力に差があり、図中、後方側でシート4、5と逆方向移動する主動側の引張部材17の引張力が大きく、シート4、5と順送方向の従動側の引張部材18の引張力を弱くした構成による作用を説明する。
図4に示す様に、スライドボード1の停止時、作動時ともに、一対の巻取ドラム6、7でシート4、5に巻き取り力を付与するため、右側の巻取ドラム6には反時計回り、左側の巻取ドラムには時計回りの引張力を、従動側の引張部材18の引張力より大きい引張力の主動側の引張部材17で付与して、シート4、5をピンと張っている(図中、太矢を参照)。
尚、主動側の引張部材17は収縮傾向で、従動側の引張部材18は伸張傾向である。
【0014】
図5に示す様に、上記スライドボード1の移動による全体作用時には、右側の巻取ドラム6の時計回り回転により、主動側の直線部15が右方向へ引張され、白抜太矢(5) で表示する様に、引張部材17を介して左側の巻取ドラム7へ作用する場合は次の通りとなる。
【0015】
先ず、全長が伸縮自在な一対の引張部材17、18(ダンパー、スプリング等)の基本的作用としては、スライドボード1の移動により、左右のシート4、5は同一量が一対の巻取ドラム6、7へ巻き取り、巻き戻しされるが、その過程において、巻き数、径差が発生して巻取ドラム6、7の回転数は相違し、巻取ドラム6、7と連動するスプロケットホイール12、13の回転数にも回転差が発生し、引張部材17、18の伸縮で主従動側の直線部15の全長、移動量を調整している。
【0016】
即ち、右側のシート4の巻き戻しにより、巻取ドラム6の直径は減少し、逆現象となる左側の巻取ドラム7に比して、右側の巻取ドラム6の回転数は増加する一方、左側の巻取ドラム7は直径増加で減少回転数で両側のシート4、5の移動量が一致する。
そのため、主動側の直線部15の右方向引張により、左側の巻取ドラム7の回転力を付与した状態で、右側の分断端19の移動量に比して、左側の分断端19a の移動量が若干少量となり、主動側の直線部15に介在設置した引張部材17は伸張して直線部15の全長は長くなる。
尚、従動側の引張部材18にあっては、主動側の引張部材17の伸張量と同量だけ収縮する。
【0017】
次に、図1、2に示す本発明の実施例では、スピンドルヘッド2を挿通し連動移動するスライドボード1は、XY2軸(左右上下)方向のものに適用出来るので、図6を参照して説明する。
実施例のスライドボード1は、図示しない案内レール等で左右(X軸)移動自在な矩形状フレーム27内に複数のボード28、28a …を重層状で上下動自在に設け、複数のボード28、28a …の内、中央1枚のボード28の適宜位置にツール出没孔3を設け、中央のボード28が上下移動した時に、その上下部に他のボード28、28a …が常時位置する。
そして、フレーム27の両側にシート4、5を連結している。
【0018】
尚、本発明の遮蔽シートの巻取構造の作用として、スライドボード1が図中、左方向へ移動する例を説明したが、逆方向移動も同様であり、又中央から外側方向、外側から中央方向等の作用も同じである
【0019】
【発明の効果】
要するに本発明は、工作機械のスピンドルヘッド2と連動するスライドボード1の両側にシート4、5を連結すると共に、該シート4、5の両側を回転自在な一対の巻取ドラム6、7に巻き取り、該巻取ドラム6、7に取付けたスプロケットホイール12、13に無端状のチェーン14を巻回したので、スライドボード1に連動移動する一方のシート4が一方の巻取ドラム6から引き出される巻き戻し回転力が、チェーン14等を介して、他方の巻取ドラム7における回転力となって、他方のシート5を巻き取ることにより、巻取ドラム6、7に巻き取り力の発生部材を内装、設置することが不要となり、高速でも長期安定してシート4、5を張設することが出来、且つ、スライドボード1の移動速度と同一速度の巻き取り力が伝導されて高速化を図ることが出来る。
【0020】
チェーン14の主動側および従動側の平行2本の直線部15、16に伸縮可能で引張力を有する引張部材17、18を夫々介在設置すると共に、巻取ドラム6、7に巻き取り力を付与する主動側の引張部材17の引張力を従動側の引張部材 18 の引張力より大きくしたので、一対の巻取ドラム6、7に巻き取り力をチェーン14等を介して付与することにより、スライドボード1両側のシート4、5を、緩みが無く、ピンと張った状態に張設することが出来る。
【0021】
スライドボード1は、両側にシート4、5を連結するフレーム27内に複数のボード28、28a …を上下動自在に設置し、その内の1枚をスピンドルヘッド2と連動させたものと成したので、工作機械のスピンドルヘッド2がXY2軸方向に移動するものにも本発明の遮蔽シートを適用することが出来る等その実用的効果甚だ大である。
【図面の簡単な説明】
【図1】本発明に係る遮蔽シートの巻取構造の正面図である。
【図2】図1の平面図である。
【図3】引張部材の一例を示す拡大断面図である。
【図4】シートをピンと張る作用状態を示す正面図及び平面図である。
【図5】スライドボードの移動時の作用を示す正面図及び平面図である。
【図6】XY2軸移動可能なスライドボードに本発明を適用した場合を示す概略正面図である。
【符号の説明】
1 スライドボード
2 スピンドルヘッド
4 シート
5 シート
6 巻取ドラム
7 巻取ドラム
12 スプロケットホイール
13 スプロケットホイール
14 チェーン
15 直線部
16 直線部
17 引張部材
18 引張部材
27 フレーム
28、28a … ボード
[0001]
BACKGROUND OF THE INVENTION
The present invention is provided between a work base in a machine tool such as a machining center and a work part provided with a spindle at the tip, and shields preventing scattering, chips, chips, etc. from adhering to the work part side during work processing. The present invention relates to a sheet winding structure.
[0002]
[Prior art]
Conventionally, a machining unit such as a machine tool for machining a workpiece is provided with a machining part provided with a spindle at the tip of the workpiece base so that the workpiece can be moved back and forth. Chips, coolant, etc. generated during machining of the workpiece of the machining unit Has a drawback that the working environment is deteriorated because it scatters to the entire surface, and a part of the scattered chips adheres to the work part, so that it has a disadvantage that a failure is likely to occur.
[0003]
Therefore, by disposing a partition wall with a retractable hole for the machine part that can be moved back and forth between the work table and the machine part, it is configured to prevent scattering adhesion to the machine tool body. A moving configuration corresponding to the vertical movement and the horizontal movement of the machine part was necessary.
As an example, as seen in Japanese Patent No. 2963315, a slide cover device for a machine tool is developed in which a vertical slide cover is inserted through a spindle head at the center of a pair of left and right horizontal slide covers. A protective cover with a cover as a sheet has also been developed.
[0004]
The seat protective cover is constructed by connecting a pair of sheets to both sides of a slide board through which the spindle head is inserted, and a pair of first and second windings in which both side ends of the sheet are provided at both side moving ends of the spindle head. It is wound with a take-up drum.
The first and second winding drums are provided with springs having a winding force so that the sheet is always pulled and wound, and the first and second windings are moved according to the horizontal movement of the spindle head. One of the take-up drums was wound up, and the other was rewound, and the sheet was always stretched so as not to be loose.
[0005]
[Problems to be solved by the invention]
Since the first and second winding drums are equipped with springs in the above-described sheet winding structure, the winding force decreases due to continuous use, metal fatigue, or failure due to adhesion of chips, There was a problem that the winding speed was insufficient for high-speed machine tools.
[0006]
[Means for Solving the Problems]
The present invention is based on the above-described prior art, and in view of the problem that the winding method using the spring built in the winding drum fails or the winding force and winding speed are insufficient, both sides of the slide board interlocked with the spindle head are provided. Along with connecting the sheet, both sides of the sheet are wound around a pair of rotatable winding drums, and an endless chain is wound around a sprocket wheel attached to the winding drum, thereby interlocking with the movement of the slide board. As one sheet moves, the sheet drawing force (rewinding state) in one winding drum becomes the winding force in the other winding drum via the chain, and the sheet can be stably stably for a long time even at high speed. To stretch. In addition, a tension member that can be expanded and contracted is interposed between two parallel linear portions on the main drive side and the driven side of the chain, and tension on the main drive side tension member that applies a winding force to the take-up drum. By making the force larger than the tensile force of the driven tension member , the winding force is applied to both winding drums so that the sheets on both sides of the slide board are stretched without tension. To solve the above problems.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, a tool in / out hole 3 through which the spindle head 2 of the machine tool is inserted is opened at a required position of the center slide board 1, and a pair of sheets 4 and 5 are connected to the left and right sides of the slide board 1. Then, both side ends of the sheets 4 and 5 are wound around a pair of winding drums 6 and 7 provided at both side moving ends of the slide board 1 by winding several times.
In the embodiment shown in FIGS. 1 and 2, the slide board 1 through which the spindle head 2 is inserted does not move up and down (Y axis movement), but only moves in the left and right (X axis) direction. However, as in the embodiment shown in FIG. 6, the present invention is of course also applicable to those moving up and down, left and right (XY axes), and if the slide board 1 and the spindle head 2 are interlocked, the connection structure of both is provided. May be directly connected or indirectly connected.
[0008]
As shown in FIGS. 1 and 2, the pair of winding drums 6 and 7 are rotatably mounted in winding cases 8 and 9 installed at both ends in the moving direction of the slide board 1. The sprocket wheels 12 and 13 are attached to the connecting shafts 10 and 11 projecting from the upper end of 7, and an endless oval chain 14 is wound around the sprocket wheels 12 and 13.
The two parallel straight portions 15 and 16 of the chain 14 between the pair of sprocket wheels 12 and 13 on both sides are distinguished from those of the main driving side and the driven side by their functions. As will be described later in the column of action , the slide board 1 In the chain 14 that travels by the above movement, the rear straight portion 15 in FIG. 2 that transmits the driving force serving as the sheet winding force is the main driving side. Specifically, the moving force of the slide board 1 becomes the moving force of the seat 4 (described in only one direction as in the explanation of the operation), and the moving force of the seat 4 becomes the rotating force of the take-up drum 6 and the sprocket wheel 12 , and the sprocket wheel 12 rotational force becomes a moving force of the chain 14 in the straight portion 15 of the rear main driving side, the moving force of the chain 14 in the straight portion 15 of the main driving side becomes the rotational force of the sprocket wheel 13 and the take-up drum 7, winding drum The rotational force of 7 becomes the sheet winding force of the sheet 5, and the linear portion 15 on the rear driving side in the chain 14 transmits a driving force in which the moving force of the slide board 1 becomes the sheet winding force.
[0009]
Tensile members 17 and 18 are interposed between two parallel straight portions 15 and 16 of the chain 14, and the split ends 19, 19 a, 20, and 20 a of the straight portions 15 and 16 are respectively attached to the tensile members 17 and 18. The tension members 17 and 18 are pulled.
As described above, in the two parallel straight portions 15 and 16 in the chain 14, the rear straight portion 15 is the main drive side, the front straight portion 16 is the follower side, and the main drive side straight portion 15 and the follower are driven. The tensile force of the pair of tension members 17 and 18 interposed between the straight portions 16 on the side strengthens the one on the main drive side (rear side in the figure) (the tension member 17).
The tension members 17 and 18 may be of any configuration as long as they can expand and contract and have a tensile force. For example, a tension coil spring may be used, and in the embodiment, a damper is adopted. As shown in FIG. The piston 22 and the compression coil spring 23 are housed inside, the rod 24 connected to the piston 22 is protruded from the cylinder 21, the compression coil spring 23 presses the piston 22, and the rod 24 is pulled into the cylinder 21, The cylinder 21 and the rod 24 have tensile forces at both ends.
[0010]
Next, the effect | action of the winding structure of the shielding sheet which concerns on this invention is demonstrated.
For example, as shown in FIG. 5, when the spindle head 2 and the slide board 1 are simultaneously moved to the left as indicated by the dashed and solid white arrows (1), the white arrows ( As shown in 2), pull the sheet 4 on the right side with the leftward moving force of the slide board 1 and rewind it so that the sheet 4 is pulled out from the winding drum 6 on the right side, and display it with the white arrow (3). In this manner, the sprocket wheel 12 rotates clockwise in synchronism with the rotation of the winding drum 6, and the linear portion 15 on the rear main drive side of the chain 14 travels in the right direction (the direction opposite to the seat 4) (white). As shown in the thick arrows (4), (5), and (6), the action of the tension member 17 interposed between the straight portions 15 will be described later.
[0011]
As the straight side 15 on the main drive side of the chain 14 travels to the right, rotate the left sprocket wheel 13 clockwise (in the same direction as the right sprocket wheel 12) as indicated by the arrow (7). As the left seat 5 is taken up by the take-up drum 7 interlocked with the rotation of the sprocket wheel 13 and moved to the left (see arrow (8)), at the same time as indicated by arrows (9) and (11), The linear portion 16 on the driven side of the chain 14 travels leftward (in the same direction as the slide board 1 and in the opposite direction to the linear portion 15 on the main driving side).
[0012]
As described above, the movement of the spindle head 2 of the machine tool is transmitted to the slide board 1, the right seat 4, the take-up drum 6, the straight portion 15 of the upper chain 14, the left take-up drum 7, and the seat 5. The sheets 4 and 5 on both sides of the slide board 1 are rewound (drawn) by a pair of winding drums 6 and 7, wound, and arranged between the linear portions 15 and 16 of the chain 14 that is a driving force transmission path. The tension members 17 and 18 indicated by the white arrow (5) and the arrow (10) tension the sheets 4 and 5 on both sides of the slide board 1 or eliminate the difference in diameter between the pair of winding drums 6 and 7. .
The difference in diameter between the pair of winding drums 6 and 7 means that when the slide board 1 is located in the center, the number of windings of the sheets 4 and 5 on the pair of winding drums 6 and 7 on both sides is the same and the diameter is the same. However, it occurs when the thickness of the sheets 4 and 5 increases or decreases in accordance with winding and rewinding.
[0013]
Next, there is a difference in tensile force between the two stretchable members 17 and 18 that can be expanded and contracted, and in the drawing, the tensile force of the tensile member 17 on the driving side that moves in the opposite direction to the seats 4 and 5 on the rear side is large. 4 and 5 and the operation of the structure in which the tensile force of the pulling member 18 on the driven side in the progressive direction is weakened will be described.
As shown in FIG. 4, since the winding force is applied to the sheets 4 and 5 by the pair of winding drums 6 and 7 both when the slide board 1 is stopped and operated, the right winding drum 6 is counterclockwise. A clockwise pulling force is applied to the winding drum on the left side by the pulling member 17 on the main driving side having a pulling force larger than the pulling force of the pulling member 18 on the driven side, and the sheets 4 and 5 are tensioned. (See the thick arrow in the figure).
The primary tension member 17 tends to contract, and the secondary tension member 18 tends to expand.
[0014]
As shown in FIG. 5, at the time of the whole action by the movement of the slide board 1, the straight portion 15 on the main drive side is pulled rightward by the clockwise rotation of the right winding drum 6, and the white arrow (5) When acting on the winding drum 7 on the left side via the tension member 17, as shown in FIG.
[0015]
First, as a basic action of the pair of tension members 17 and 18 (damper, spring, etc.) whose length can be freely expanded and contracted, the left and right sheets 4 and 5 have the same amount of the pair of winding drums 6 as the slide board 1 moves. In this process, a difference in the number of windings and the diameter occurs and the number of revolutions of the winding drums 6 and 7 is different, and the sprocket wheel 12 interlocked with the winding drums 6 and 7 is used. , A rotational difference is also generated at the rotational speed of 13, and the total length and the movement amount of the linear portion 15 on the main driven side are adjusted by the expansion and contraction of the tension members 17 and 18.
[0016]
That is, when the right sheet 4 is rewound, the diameter of the winding drum 6 decreases, and the rotation speed of the right winding drum 6 increases as compared with the left winding drum 7 which is the opposite phenomenon. The winding drum 7 on the left side has the same amount of movement of the sheets 4 and 5 on both sides at a reduced rotational speed as the diameter increases.
Therefore, in the state where the rotational force of the left winding drum 7 is applied by rightward pulling of the linear portion 15 on the main drive side, the amount of movement of the left divided end 19a is larger than the amount of movement of the right divided end 19. The amount of movement becomes slightly small, and the tension member 17 interposed in the linear portion 15 on the main drive side expands to increase the total length of the linear portion 15.
Note that the driven-side tension member 18 contracts by the same amount as the extension amount of the primary-side tension member 17.
[0017]
Next, in the embodiment of the present invention shown in FIGS. 1 and 2, the slide board 1 that is inserted and moved in conjunction with the spindle head 2 can be applied to the XY 2 axis (left and right and up and down) directions. explain.
The slide board 1 according to the embodiment is provided with a plurality of boards 28, 28a... In a rectangular frame 27 that can be moved left and right (X-axis) by a guide rail (not shown), etc. 28a... Are provided at appropriate positions on one central board 28, and when the central board 28 moves up and down, the other boards 28, 28a.
The seats 4 and 5 are connected to both sides of the frame 27.
[0018]
In addition, as an effect | action of the winding structure of the shielding sheet | seat of this invention, although the example which the slide board 1 moves to the left direction in a figure was demonstrated, the reverse direction movement is also the same, and also from the center to the outside direction, the outside to the center The direction and the like are the same. [0019]
【The invention's effect】
In short, the present invention connects the sheets 4 and 5 to both sides of the slide board 1 interlocked with the spindle head 2 of the machine tool, and winds both sides of the sheets 4 and 5 around a pair of winding drums 6 and 7 that are rotatable. Since the endless chain 14 is wound around the sprocket wheels 12 and 13 attached to the winding drums 6 and 7, one sheet 4 moving in conjunction with the slide board 1 is pulled out from the one winding drum 6. The rewinding rotational force becomes the rotational force in the other winding drum 7 via the chain 14 or the like, and the other sheet 5 is wound up, so that a member for generating the winding force is applied to the winding drums 6 and 7. The interior and installation are not required, the sheets 4 and 5 can be stably stretched for a long time even at high speed, and the winding force at the same speed as the moving speed of the slide board 1 is conducted to increase the speed. Door can be.
[0020]
Tensile members 17 and 18 that can be expanded and contracted are installed on two parallel straight portions 15 and 16 on the main driving side and the driven side of the chain 14, respectively, and a winding force is applied to the winding drums 6 and 7. Since the pulling force of the pulling member 17 on the main drive side is larger than the pulling force on the pulling member 18 on the driven side, the take-up force is applied to the pair of take-up drums 6 and 7 via the chain 14 and the like. The sheets 4 and 5 on both sides of the board 1 can be stretched without being loosened.
[0021]
The slide board 1 is configured such that a plurality of boards 28, 28a,... Are vertically movable in a frame 27 connecting the seats 4, 5 on both sides, and one of them is interlocked with the spindle head 2. Therefore, the shielding effect of the present invention can be applied even to the machine tool spindle head 2 moving in the XY2 axis direction, and the practical effect is significant.
[Brief description of the drawings]
FIG. 1 is a front view of a winding structure of a shielding sheet according to the present invention.
2 is a plan view of FIG. 1. FIG.
FIG. 3 is an enlarged sectional view showing an example of a tension member.
FIGS. 4A and 4B are a front view and a plan view showing a working state of tensioning a sheet. FIGS.
FIGS. 5A and 5B are a front view and a plan view showing an action when the slide board moves. FIGS.
FIG. 6 is a schematic front view showing a case where the present invention is applied to a slide board capable of XY biaxial movement.
[Explanation of symbols]
1 Slide board 2 Spindle head 4 Sheet 5 Sheet 6 Winding drum 7 Winding drum
12 Sprocket wheel
13 Sprocket wheel
14 chain
15 Straight section
16 Straight section
17 Tensile member
18 Tensile member
27 frames
28, 28a… Board

Claims (2)

スピンドルヘッドと連動するスライドボードの両側にシートを連結すると共に、該シートの両側を回転自在な一対の巻取ドラムに巻き取り、該巻取ドラムに取付けたスプロケットホイールに無端状のチェーンを巻回し、該チェーンの主動側および従動側の平行2本の直線部に伸縮可能で引張力を有する引張部材を夫々介在設置すると共に、巻取ドラムに巻き取り力を付与する主動側の引張部材の引張力を従動側の引張部材の引張力より大きくしたことを特徴とする遮蔽シートの巻取構造。A sheet is connected to both sides of a slide board linked to the spindle head, and both sides of the sheet are wound around a pair of rotatable winding drums, and an endless chain is wound around a sprocket wheel attached to the winding drum. In addition, a tension member that can be expanded and contracted is provided between two parallel linear portions on the main driving side and the driven side of the chain, and tension on the main driving side member that applies a winding force to the winding drum. A winding structure for a shielding sheet, characterized in that the force is greater than the tensile force of the tension member on the driven side . スライドボードは、両側にシートを連結するフレーム内に複数のボードを上下動自在に設置し、その内の1枚をスピンドルヘッドと連動させたものと成したことを特徴とする請求項1記載の遮蔽シートの巻取構造。  2. The slide board according to claim 1, wherein a plurality of boards are installed so as to be movable up and down in a frame connecting sheets on both sides, and one of the boards is interlocked with a spindle head. Winding structure of shielding sheet.
JP2001126813A 2001-04-25 2001-04-25 Winding structure of shielding sheet Expired - Fee Related JP3741970B2 (en)

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JP2001126813A JP3741970B2 (en) 2001-04-25 2001-04-25 Winding structure of shielding sheet

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JP3741970B2 true JP3741970B2 (en) 2006-02-01

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CN107984294A (en) * 2017-11-17 2018-05-04 宁夏共享机床辅机有限公司 Vertical machining centre Z axis screw protective cover

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