JPS639389Y2

JPS639389Y2 -

Info

Publication number: JPS639389Y2
Application number: JP14970382U
Authority: JP
Priority date: 1982-10-01
Filing date: 1982-10-01
Publication date: 1988-03-19
Also published as: JPS5955635U

Description

【考案の詳細な説明】この考案は、工作物の落下防止装置に関するも
のである。[Detailed Description of the Invention] This invention relates to a workpiece fall prevention device.

工作機械において、第１図に示すように、主軸
台ａと心押台ｂとで工作物ｃを支承し、砥石等の
工具ｄで加工する場合に、工作物ｃの着脱時に工
作物ｃの下方に配置したワークレストｅで工作物
ｃを支持することにより着脱作業が容易にできる
ようになつている。ところが、第１図ロに示すよ
うに工具ｄが後退すると、工作物ｃと工具ｄとの
間に大きな隙間が生じて、工作物ｃがワークレス
トｅの背面側に誤まつて転落することが頻発し
た。このような工作物ｃの落下場所付近は、一般
に狭くかつ作業者とは反対側になるため落下した
工作物を取出す作業が厄介で、作業能率の低下を
来たすばかりでなく、工作物が傷付いて品質を低
下させ、場合によつては不良品となることがあつ
た。 In a machine tool, as shown in Fig. 1, when a workpiece c is supported by a headstock a and a tailstock b and processed with a tool d such as a grindstone, the workpiece c is By supporting the workpiece c with a work rest e placed below, attachment and detachment operations can be easily performed. However, when the tool d retreats as shown in Figure 1B, a large gap is created between the workpiece c and the tool d, and the workpiece c may accidentally fall onto the back side of the workrest e. It happened frequently. The area near where the workpiece c falls is generally narrow and on the opposite side of the worker, making it difficult to retrieve the fallen workpiece, which not only reduces work efficiency but also causes damage to the workpiece. This led to a decline in quality, and in some cases resulted in defective products.

そこで工作物ｃが落下しないように、例えばワ
ークレストｅの上面に断面Ｕ形溝を形成し、この
溝で工作物ｃを受止するようにすれば良いけれど
も、工作物ｃの径によつては工具ｄによる加工の
際に、溝の縁が邪魔となつて加工ができない事態
が発生する。 To prevent the workpiece c from falling, for example, a groove with a U-shaped cross section may be formed on the upper surface of the workpiece rest e, and the workpiece c may be received in this groove. However, depending on the diameter of the workpiece c, When machining is performed using tool d, the edge of the groove becomes an obstacle, resulting in a situation where machining cannot be performed.

本考案は、上記のような従来の事態に鑑みなさ
れたもので、工作物の一対を確実に防止でき、し
かも構造が簡単な工作物落下防止装置を提供する
ことを目的とする。この目的を達成するために、
本考案は、受止片を有する落下防止板を回転可能
に取付け、工具の後退時には受止片によつて前記
ワークレストとの隙間を狭小にし、かつ加工時に
は工具の邪魔にならないように落下防止板を回転
させて変位できるようにしたことを要旨とするも
のである。 The present invention was developed in view of the conventional situation as described above, and an object of the present invention is to provide a workpiece fall prevention device that can reliably prevent a pair of workpieces from collapsing and has a simple structure. to this end,
In this invention, a fall prevention plate with a catch piece is rotatably mounted, and when the tool is retracted, the gap with the work rest is narrowed by the catch piece, and the tool is prevented from falling so that it does not get in the way during machining. The gist is that the plate can be rotated and displaced.

以下、図示の実施例により本考案を具体的に説
明すると、１は落下防止板であり、心押台２に固
定された取付アーム３の先端部にピン４で枢支さ
れている。落下防止板１は、下部に受止片１ａが
折曲形成され、止部にはスペーサ１ｂが取付けら
れると共に、このスペーサに長孔１ｃが形成され
ている。５は心押台２の進退自在の心押軸２ａの
先端部に固定されたステーであり、この上部張出
部５ａの先端にピン６が取付けられ、このピンは
前記落下防止板１の前記長孔１ｃに摺動可能に係
合されている。 The present invention will be described in detail below with reference to the illustrated embodiment. Reference numeral 1 denotes a fall prevention plate, which is pivotally supported by a pin 4 at the tip of an attachment arm 3 fixed to a tailstock 2. Fall prevention plate 1 has a receiving piece 1a bent at the bottom, a spacer 1b attached to the stopper, and a long hole 1c formed in the spacer. Reference numeral 5 denotes a stay fixed to the tip of a tailstock shaft 2a which can move back and forth on tailstock 2, and a pin 6 is attached to the tip of an upper protruding part 5a of the stay, which is slidably engaged with the long hole 1c of fall prevention plate 1.

本考案に係る装置は上記のように構成され、工
作物７の加工中は心押軸２ａは前進した状態にあ
り、前記落下防止板１は第２図において実線で示
す位置にあつて、工具８の加工に支障がないよう
にしてある。そして、加工が終了すると、工具８
が後退すると共に心押軸２ａが後退し、この心押
軸２ａの後退に伴つて落下防止板１が前記ピン４
を支点として回動させられ、第２図に仮想線で示
す位置に保持される。このとき、落下防止板１は
前記受止片１ａが工作物７と平行となり、第３図
に示すように工作物７を支持したワークレスト９
との間δを狭小にすることができ、従来のように
工作物７が下方に落ちるのを防ぐことができる。 The apparatus according to the present invention is constructed as described above, and during machining of the workpiece 7, the tailstock shaft 2a is in an advanced state, the fall prevention plate 1 is in the position shown by the solid line in FIG. It is designed so that there will be no hindrance to the processing in step 8. When the machining is finished, the tool 8
As the tailstock shaft 2a retreats, the tailstock shaft 2a retreats, and as the tailstock shaft 2a retreats, the fall prevention plate 1
is rotated about the fulcrum and held at the position shown by the imaginary line in FIG. At this time, the receiving piece 1a of the fall prevention plate 1 becomes parallel to the workpiece 7, and the workpiece 7 is supported by the workpiece rest 9 as shown in FIG.
δ can be narrowed, and the workpiece 7 can be prevented from falling downward as in the conventional case.

そして、次の工作物をセツトする時に再び心押
軸２ａが前方に伸びると、落下防止板１はピン４
を支点として逆方向に回動させられ、第２図の実
線で示す位置に戻され、工具８による加工がなさ
れる。 Then, when the tailstock shaft 2a extends forward again when setting the next workpiece, the fall prevention plate 1
The tool 8 is rotated in the opposite direction using the tool 8 as a fulcrum, returned to the position shown by the solid line in FIG. 2, and processed by the tool 8.

以上のように、本考案によれば、心押軸の前進
後退の動作に連動して落下防止板が回動するよう
に構成し、工作物の加工後に落下防止板の受止片
をワークレストに接近させてその間隔を狭小に保
持するようにしたので、工作物の落下を未然に防
止し、工作物の着脱作業の能率を向上させ、かつ
落下による工作物の損傷を完全に防止できる等の
すぐれた効果が得られる。また、工具による加工
時には、落下防止板は工具の邪魔とならない位置
に待機されるので、何ら加工作業に支障をきたす
ことがない。 As described above, according to the present invention, the fall prevention plate is configured to rotate in conjunction with the forward and backward movements of the tailstock shaft, and the catch piece of the fall prevention plate is moved to the workpiece rest after machining the workpiece. Since the distance between the workpieces and the workpieces is kept close to each other and kept narrow, it is possible to prevent the workpiece from falling, improve the efficiency of attaching and detaching the workpiece, and completely prevent damage to the workpiece due to falling. Excellent effects can be obtained. Further, during machining with a tool, the fall prevention plate is placed on standby at a position where it does not interfere with the tool, so it does not interfere with the machining operation.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、従来例を示すもので、イは要部の概
略正面図、ロは工作物の落下の様子を示す概略側
面図、第２図は、本考案の一実施例を示す要部の
構成図、第３図は、工作物の落下防止の様子を示
す概略側面図である。１……落下防止板、１ａ……受止片、１ｃ……
長孔、２……心押台、２ａ……心押軸、３……取
付アーム、４……ピン、５……ステー、６……ピ
ン、７……工作物、８……工具、９……ワークレ
スト。 Fig. 1 shows a conventional example, A is a schematic front view of the main part, B is a schematic side view showing how a workpiece falls, and Fig. 2 is a main part showing an embodiment of the present invention. FIG. 3 is a schematic side view showing how workpieces are prevented from falling. 1... Fall prevention plate, 1a... Reception piece, 1c...
Elongated hole, 2... Tailstock, 2a... Tailstock shaft, 3... Mounting arm, 4... Pin, 5... Stay, 6... Pin, 7... Workpiece, 8... Tool, 9 ...Work rest.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

主軸台と心押台とで工作物を支承し、かつ工作
物の下方にワークレストを備えた工作機械におい
て、前記心押台に取付アームを固定し、下部に受
止片を設けると共に上部に長孔を設けた落下防止
板を前記取付アームに回転可能に枢支し、前記心
押台における進退自在の心押軸の先端部にステー
を固定し、このステーの先端部に取付けたピンを
前記落下防止板の長孔に摺動可能に係合させてな
ることを特徴とする工作物落下防止装置。 In a machine tool in which a workpiece is supported by a headstock and a tailstock, and a work rest is provided below the workpiece, a mounting arm is fixed to the tailstock, a receiving piece is provided at the lower part, and a receiving piece is provided at the upper part. A fall prevention plate provided with a long hole is rotatably supported on the mounting arm, a stay is fixed to the tip of a tailstock shaft that can move forward and backward in the tailstock, and a pin attached to the tip of the stay is fixed to the tailstock. A workpiece fall prevention device, characterized in that the workpiece fall prevention device is slidably engaged with a long hole of the fall prevention plate.