200936307 六、發明說明： 【發明所屬之技術領域】 本發明，是有關於將加工對象的透鏡素材的表面 壓在旋轉的透鏡加工具的加工面，使該透鏡素材一邊 旋轉一邊進行其表面的切削、硏磨加工的透鏡加工裝 進一步詳細的話，有關於將透鏡加工時的透鏡素材按 透鏡加工具的加壓力的微小調整可以精度佳地進行， Φ 以追從透鏡加工時的振動等將透鏡移動，在透鏡加工 透鏡真空吸引並可以吸著保持於透鏡保持具的透鏡加 置的透鏡保持、加壓機構。 【先前技術】 已知透鏡加工裝置是如第2圖所示的構造。此圖 的透鏡加工裝置100，是在中空的透鏡支撐軸102的 部，隔著軸承103，在可旋轉自如的狀態下使中空 ❹ 104被安裝成同軸狀。在中空轉軸104的下端中在同 態下透鏡保持具105是朝下方地被固定。 在透鏡保持具105的下側，呈朝上方狀態配置有 加工具106。透鏡加工具106是具備彎曲狀的加工面 ，以其中心軸線1 〇6b爲中心藉由未圖示的驅動源被 驅動。且，透鏡加工具106，是以其中心軸線106b及 的轉軸的中心軸線101的交點爲中心，藉由未圖示的 機構例如朝左右擺動，在加工中，可以變更這些中心 106b及101形成的角度0。 ，按 附屬 置。 壓在 使可 中將 工裝 所示 中空 轉軸 軸狀 透鏡 10 6a 旋轉 上側 擺動 軸線 200936307 在加工時，旋轉的透鏡加工具106的加工面106a，是 藉由透鏡支撐軸102，由被保持於透鏡保持具1〇5的透鏡 素材111的表面所按壓。安裝有透鏡保持具105的中空轉 軸104因爲是在可旋轉自如的狀態藉由透鏡支撐軸102被 支撐，所以隨著透鏡加工具106的旋轉，朝中心軸線1〇1 周圍附屬旋轉。如此，藉由組合：以中心軸線101爲中心 的透鏡加工具106的旋轉運動、及以中心軸線101爲中心 的透鏡素材110的附屬旋轉運動、及透鏡加工具106的擺 動運動，來進行透鏡表面的切削、硏磨加工等。 在此，透鏡支撐軸102是藉由軸承110朝上下方向可 滑動地被支撐。透鏡加工時的加工壓力，是藉由設在透鏡 支撐軸102的上部的彈簧、汽缸等的未圖示的加壓手段而 獲得。由加壓手段所産生的加工壓力，是隔著透鏡支撐軸 102、軸承103、中空轉軸104被傳達至透鏡保持具105, 被保持於該透鏡保持具105及透鏡加工具106之間的透鏡 素材111的表面是被按壓在加工面l〇6a。加壓手段，是例 如專利文獻1等爲公知。 〔專利文獻1〕日本特開200 7-150 74號公報 【發明內容】 (本發明所欲解決的課題） 在習知的透鏡加工裝置中的透鏡素材的保持機構及加 壓機構中具有如以下問題點。首先，加壓手段及透鏡保持 具105之間，是配置有透鏡支撐軸102、軸承103及中空 -6- 200936307 轉軸104。因此，在加壓方向因爲有透鏡支撐軸102的自 重施加，所以施加微小的加工壓力是困難的。爲了可以施 加微小的加工壓力，有需要達成包含透鏡支撐軸102的加 壓機構的輕量化。例如，考慮將透鏡支撐軸102薄化而形 成小徑的配管來達成輕量化。但是，如此的話，因爲透鏡 支撐軸1 02的機械的強度、剛性不足，且加工精度下降的 等的弊害會發生所以不適合。 φ 且，在習知中的透鏡支撐軸102的自重，是在透鏡加 工中隨時作用於透鏡保持具1〇5。因此，振動等發生而使 加工壓力瞬間地變化的情況時，因爲透鏡支撐軸1 〇2的慣 性力，所以透鏡保持具1 〇5無法追從瞬間的加工壓力的變 化而上下移動。此結果，過剩的力是作用於加工中的透鏡 素材等，有可能引起透鏡破損、變形的等的弊害。 進一步，習知，爲了將加工對象的透鏡素材111吸著 保持在透鏡保持具105的透鏡保持面，真空吸引通路’是 〇 從透鏡保持具105經由配置於中空轉軸104及透鏡支撐軸 102的內側的真空管112延伸。 在透鏡加工時中空轉軸104是對於透鏡支撐軸102可 旋轉自如地被保持。因此，將加工對象的透鏡素材111吸 引保持在透鏡保持面時，是隔著〇形環113將真空管112 的端按壓在中空轉軸104的端而形成氣密狀態的真空吸引 通路。在透鏡加工時，將真空管112從中空轉軸104遠離 ，使中空轉軸104可追從透鏡加工具106平滑地旋轉。因 此，在透鏡加工中無法將中透鏡素材111吸著保持在透鏡 200936307 保持具105的透鏡保持面。實現爲了高精度的透鏡加工， 雖是將加工中的透鏡素材吸著保持在透鏡保持面較佳，但 是在習知的加工中因無法將透鏡素材吸著保持在透鏡加工 面而不方便。 本發明的課題是提案一種透鏡加工裝置，可消解這種 習知的問題點。 (用以解決課題的手段） u 爲了解決上述的課題，本發明是一種透鏡加工裝置， 是在旋轉的透鏡加工具的加工面將透鏡素材按壓，使該透 鏡素材一邊附屬旋轉一邊進行其表面的切削、硏磨加工等 ，其特徵爲，具有：對於前述透鏡加工具可相對地昇降的 透鏡支撐軸、及從前述透鏡支撐軸的下端面在同軸狀態下 朝下方延伸的外筒、及在前述外筒的內側呈同軸狀態配置 並藉由該外筒在朝前述透鏡支撐軸的中心軸線的方向只有 預定量可滑動的狀態下被支撐的內筒、及在前述內筒的內 d 側呈同軸狀態配置並藉由該內筒在朝前述中心軸線周圍可 旋轉的狀態被支撐的轉軸、及在前述轉軸的下端呈同軸狀 態被安裝的透鏡保持具、及對於前述外筒將前述內筒朝下 方推迫的加壓彈簧。 在此，本發明的透鏡加工裝置，可以使用：具備被固 定於前述內筒的下端部的內周側部分和對於前述外筒的下 端部在沿著前述中心軸線只可朝上方相對移動預定量的狀 態下被安裝的外周側部分之彈簧基座、及螺合於前述外筒 -8- 200936307 的上端側外周面部分的壓力螺帽。此情況，藉由前述彈簧 基座，前述內筒是朝前述中心軸線的方向只可滑動預定量 的狀態被支撐於前述外筒。且，前述加壓彈簧，是在將前 述外筒圍起來的狀態下，配置於前述壓力螺帽及前述彈簧 基座之間即可。 在本發明的透鏡加工裝置中，從透鏡支撐軸的下端朝 設置同軸狀態延伸的外筒，朝上下方向可滑動地將轉軸可 Φ 旋轉地配置在此外筒的內側，藉由配置於外筒的外側的加 壓彈簧對於轉軸施加透鏡加工壓力。且，藉由旋轉壓力螺 帽，調節加壓彈簧的壓縮狀態就可改變透鏡加工壓力。 如此，在本發明中，透鏡加工壓力因爲不受透鏡支撐 軸的重量的影響，所以可以將微小的加工壓力施加在透鏡 保持具，微小的加工壓力的微調整也成爲可能。且，由透 鏡支撐軸所産生的慣性力因爲不作用於透鏡保持具，所以 透鏡保持具可以追從由透鏡加工中的振動等所産生的加工 〇 壓力的變化瞬間地上下移動。進一步，因爲透鏡支撐軸不 需要輕量化，所以透鏡支撐軸可具備充分的機械的強度及 剛性，可以維持透鏡加工精度。 接著，對於本發明的透鏡加工裝置，前述轉軸是中空 轉軸，從前述透鏡保持具的透鏡保持面，經由前述中空轉 軸的中空部，形成與前述外筒的中空部連通的真空吸引路 ’在前述中空轉軸的前述中空部及前述外筒的前述中空部 的連通部分，配置有密封機構，可旋轉地朝上下方向可滑 動的狀態下支撐前述中空轉軸。 -9- 200936307 依據此構成，可以隔著真空吸引路，將加工對象的透 鏡吸著保持在透鏡保持具的透鏡保持面。且，藉由密封機 構，中空轉軸可旋轉且可上下滑動。因此，在將透鏡透鏡 保持面的吸著保持的狀態下的透鏡加工成爲可能。 〔發明的效果〕 在本發明的透鏡加工裝置中，透鏡加工壓力因爲不受 透鏡支撐軸的重量的影響，所以可以將微小的加工壓力施 加在透鏡保持具，微小的加工壓力的微調整也成爲可能。 且，由透鏡支撐軸所産生的慣性力因爲不作用於透鏡保持 具，所以透鏡保持具可以追從由透鏡加工中的振動等所産 生的加工壓力的變化而瞬間地上下移動。進一步，透鏡支 撐軸因爲不需要輕量化，所以透鏡支撐軸可具備充分的機 械的強度及剛性，可以維持透鏡加工精度。 【實施方式】 以下，參照圖面，說明適用本發明的透鏡加工裝置的 實施例。 第1圖是顯示本實施例的透鏡加工裝置的主要部分的 槪略構成圖，將右半部由剖面顯示。透鏡加工裝置1的基 本構成是與習知者同樣，具有垂直地配置的透鏡支撐軸3 ，在此透鏡支撐軸3中，隔著後述的透鏡加壓機構安裝有 中空轉軸4。中空轉軸4，是對於透鏡支撐軸3朝其中心 軸線2的周圍可旋轉及朝該中心軸線2的方向（上下方向 -10- 200936307 )可滑動地被安裝。在中空轉軸4的下端中在同軸狀態下 透鏡保持具5是朝下方地被固定。透鏡保持具5的朝下方 的面是成爲彎曲的透鏡保持面5a，在此可吸著保持加工對 象的透鏡素材6。透鏡加工具7是從下側與透鏡保持面5a 對峙。透鏡素材6，是在被吸著保持於透鏡保持具5的狀 態下被搬運直到透鏡加工具7的透鏡加工面7a的正上的 位置爲止，在這些透鏡保持具的透鏡保持面5a及透鏡加 φ 工具7的透鏡加工面7a之間由預定的加工壓力被挾持， 在此狀態下，透鏡加工具7的加工軸7b是藉由旋轉及擺 動，進行透鏡素材6的透鏡面的硏磨、硏削。 在透鏡加工裝置1中具備將加工壓力施加在透鏡素材 6用的透鏡加壓機構。透鏡加壓機構是如下地構成。從透 鏡支撐軸3的下端面3a形成有呈同軸狀態朝下方延伸的 支撐軸圓筒部3b。將此支撐軸圓筒部3b呈同軸狀態圍起 來的方式固定圓形剖面的組裝管11。且，在支撐軸圓筒部 Φ 3b的內側中呈同軸狀態固定有圓形剖面的外管12。外管 12的上端部12a，是被嵌入固定在透鏡支撐軸3的下端開 口。藉由這些支撐軸圓筒部3b、組裝管11及外管12構成 外筒組件。 組裝管11及外管12，是比支撐軸圓筒部3b的下端更 朝下方延伸，這些的下端部分Hb及12b是相互被連結固 定。在組裝管11的外周面的上端部分螺合有壓力螺帽13 。且在將組裝管11的外周面圍起來的狀態配置有由捲簧 所構成的加壓彈簧14，該加壓彈簧14的上端是從下側被 -11 - 200936307 按壓在壓力螺帽13。 接著，在外管12的內側中，在同軸狀態下朝上下方 向可滑動的狀態下配置有圓形剖面的內管15。在內管15 的內側，隔著配置於遠離中心軸線2的方向（上下）的位 置的滾珠軸承16、17，使中空轉軸4在可旋轉自如的狀態 下被同軸地支撐。且’在內管15的下端中固定有彈簧基 座1 8。 彈簧基座18，是具備：形成有中心孔的圓盤狀部分 18a、及從此圓盤狀部分18a的內周緣朝上方突出的圓環 狀部分18b、及從圓盤狀部分18a的外周緣朝上方突出的 圓環狀部分18c。內側的圓環狀部分18b’是在內管15的 下端開口部的內周面部分從下側被螺入固定’該圓環狀部 分18b及中空轉軸4之間是藉由密封環在可旋轉自如的狀 態下被封鎖。在外側的圓環狀部分18c，形成有朝半徑方 向延伸的停止器安裝孔18d。在此停止器安裝孔18d中從 外側被插入固定有水平停止器19。停止器19的內端部， 是在形成於外管12的下端部的上下方向在朝上下方向可 滑動的狀態下插入一定的長度的卡合溝12c。且在外側的 圓環狀部分18c的上端部分，形成有供載置加壓彈簧14 的下端用的圓環狀的座面18e。 接著，透鏡加工裝置1，是具備在透鏡保持具5的透 鏡保持面5a將透鏡素材6真空吸引用的真空吸引路。此 真空吸引路，是從透鏡保持面5a經由中空轉軸4的中空 部4a經由插入透鏡支撐軸3內的空氣管21，與未圖示的 -12 - 200936307 真空發生機構連繋。 在此，中空轉軸4的上端部4b，是在同軸狀態下藉由 外管12的上端部12a被圍起來。上端部4b的外周面部分 及上端部12a的內周面部分之間挾持有Ο形環22。且， 在外管12的上端部12a中，形成有朝內方突出的圓環狀 突起1 2d，在其上方側中形成有圓環狀的段面12e，在這 些之間可上下移動0形環22。藉由此構成的密封機構， φ 中空轉軸4是被保持在可旋轉及上下滑動的狀態下。 且，從外管12的上端部12a的上端使小徑的連結管 部分12f朝上方突出。空氣管21，是依據需要，對於此連 結管部分12f從上側被插入固定。藉由配置空氣管21，形 成真空吸引路。 在如此構成的透鏡加工裝置1中，在透鏡支撐軸3的 支撐軸圓筒部3b，從下側安裝有；組裝管11、外管12、 壓力螺帽13、由加壓彈簧14所構成的透鏡加壓機構。接 φ 著組裝：內管15、彈簧基座18、中空轉軸4、由滾珠軸承 16、17所構成的轉軸組件，將此轉軸組件從下方插入透鏡 加壓機構，將停止器19插入外管12的卡合溝12c，使不 會脫落、旋轉的方式固定轉軸組件。 內管15，是可在外管12內無抵抗地上下滑動。且， 藉由旋轉被安裝於組裝管U的外周的壓力螺帽13將其位 置上下調整，就可以調整加壓彈簧14的壓縮量。加壓彈 簧14，是隔著彈簧基座18將轉軸組件朝下方加壓。 因此，藉由加壓彈簧14，可以使發生將透鏡保持具5 -13- 200936307 及透鏡素材6按壓在透鏡加工具7用的加工壓力，藉由旋 轉壓力螺帽13，可以調整加壓壓力。 且，需要由真空吸引所産生的透鏡保持的情況時，將 空氣管21插入外管12的上端部的連結管部分12f，形成 第1圖所示的真空吸引路，藉由外部的未圖示的真空發生 機構進行真空吸引即可。 〔實施例的作用效果〕 依據此構成的透鏡加工裝置1，可以將加工中的加工 壓力進行微調整，可以防止由小徑的透鏡和厚度薄的透鏡 的加工壓力所産生的變形，也可防止由從透鏡素材6及透 鏡加工具7之間的過剩的摩擦所發生的熱所産生的變形。 且，因爲可以構成小型且輕量的轉軸組件，所以可以 減低作用於透鏡保持具5的慣性力。此結果，由振動等對 於所産生的衝擊，成爲可瞬間將透鏡保持具5上下動作。 因此，因爲可以保持在隨時將透鏡素材6及透鏡加工具7 密合的狀態，所以透鏡加工具7不會偏摩耗、損傷’而加 工精度、加工品質可提高。 進一步，透鏡支撐軸3的自重因爲不會作爲加工壓力 作用，所以透鏡支撐軸3的重量無限制。因此’可以安裝 機械的強度及剛性較高的透鏡支撐軸’有利於透鏡加工的 高精度化。 進一歩，在習知的構造中’透鏡支撐軸是上下滑動的 構造，藉由透鏡支撐軸和軸承的摩耗使透鏡加工精度變化 -14- 200936307 的情況時，其修理必需要專門的技術者’且需要很多時間 及費用。依據本例，因爲可以只交換外管12及內管15, 所以可由使用者修理，且，修理時間、修理費用也少。 而，且在透鏡加工中因爲可將透鏡素材6真空吸引在 透鏡保持具5,所以可以將不安定形狀的透鏡高精度地加 工。且，不需要爲了真空吸引而使用如習知的真空管等的 機械加工零件，且，也不需要將真空管上下移動用的機構 。空氣管21因爲可以使用便宜且容易取得的零件，所以 容易由使用者調度零件，交換作業等也不需要特別的技術 就可以進行。 【圖式簡單說明】 〔第1圖〕適用本發明的透鏡加工裝置的槪略構成圖 〔第2圖〕習知的透鏡加工裝置的槪略構成圖。In the present invention, the surface of the lens material to be processed is pressed against the surface of the rotating lens-applying tool, and the surface of the lens material is rotated while rotating. Further, when the lens processing of the honing processing is further detailed, it is possible to precisely adjust the lens material during lens processing by the pressing force of the lens tool, and Φ moves the lens in accordance with vibration during lens processing. The lens holding lens vacuum suctions and can hold the lens holding and pressing mechanism held by the lens held by the lens holder. [Prior Art] A lens processing apparatus is known as the structure shown in Fig. 2. In the lens processing apparatus 100 of this drawing, the hollow crucible 104 is coaxially mounted in a rotatable state in a portion of the hollow lens supporting shaft 102 via a bearing 103. In the lower end of the hollow shaft 104, the lens holder 105 is fixed downward in the same state. On the lower side of the lens holder 105, an application tool 106 is disposed in an upward state. The lens processing tool 106 is a machined surface having a curved shape and is driven by a drive source (not shown) around the central axis 1 〇 6b. Further, the lens applying tool 106 is formed by a mechanism (not shown) centering on the intersection of the central axis 106b and the central axis 101 of the rotating shaft, for example, and can be changed during machining to change the centers 106b and 101. Angle 0. , press the accessory. Pressing the hollow shaft lens 10 6a shown in the tooling tool to rotate the upper swing axis 200936307. During processing, the machined surface 106a of the rotating lens applying tool 106 is held by the lens by the lens supporting shaft 102. The surface of the lens material 111 having 1〇5 is pressed. Since the hollow rotating shaft 104 to which the lens holder 105 is attached is supported by the lens supporting shaft 102 in a rotatable state, it rotates around the center axis 1〇1 as the lens applying tool 106 rotates. Thus, by combining: the rotational motion of the lens applying tool 106 centered on the central axis 101, and the auxiliary rotational motion of the lens material 110 centered on the central axis 101, and the oscillating motion of the lens applying tool 106, the lens surface is performed. Cutting, honing, etc. Here, the lens support shaft 102 is slidably supported by the bearing 110 in the up and down direction. The processing pressure at the time of lens processing is obtained by a pressing means (not shown) such as a spring or a cylinder provided on the upper portion of the lens support shaft 102. The processing pressure generated by the pressurizing means is transmitted to the lens holder 105 via the lens support shaft 102, the bearing 103, and the hollow rotating shaft 104, and the lens material held between the lens holder 105 and the lens adding tool 106 is supported. The surface of 111 is pressed against the machined surface l〇6a. The pressurizing means is known, for example, from Patent Document 1. [Patent Document 1] Japanese Laid-Open Patent Publication No. H07-15074 (Invention) [Problems to be Solved by the Invention] The lens material holding mechanism and the pressurizing mechanism in the conventional lens processing apparatus have the following Problems. First, between the pressing means and the lens holder 105, a lens supporting shaft 102, a bearing 103, and a hollow -6-200936307 rotating shaft 104 are disposed. Therefore, it is difficult to apply a slight processing pressure in the pressurizing direction because of the self-weight of the lens supporting shaft 102. In order to be able to apply a small machining pressure, it is necessary to achieve weight reduction of the pressing mechanism including the lens support shaft 102. For example, it is conceivable to reduce the weight by forming a pipe having a small diameter by thinning the lens support shaft 102. However, in this case, the mechanical strength and rigidity of the lens support shaft 102 are insufficient, and the disadvantages such as a decrease in machining accuracy occur, which is not suitable. φ And, in the conventional lens supporting shaft 102, the self-weight acts on the lens holder 1〇5 at any time during lens processing. Therefore, when vibration or the like occurs and the machining pressure is instantaneously changed, since the lens supports the inertia force of the shaft 1 〇 2, the lens holder 1 〇 5 cannot move up and down in accordance with the change in the machining pressure at the moment. As a result, the excess force acts on the lens material or the like during processing, which may cause damage or deformation of the lens. Further, conventionally, in order to suck and hold the lens material 111 to be processed on the lens holding surface of the lens holder 105, the vacuum suction path ' is disposed from the lens holder 105 via the inside of the hollow shaft 104 and the lens support shaft 102. The vacuum tube 112 extends. The hollow shaft 104 is rotatably held for the lens support shaft 102 during lens processing. Therefore, when the lens material 111 to be processed is sucked and held by the lens holding surface, the end of the vacuum tube 112 is pressed against the end of the hollow rotating shaft 104 via the ring-shaped ring 113 to form a vacuum suction passage in an airtight state. At the time of lens processing, the vacuum tube 112 is moved away from the hollow rotating shaft 104, so that the hollow rotating shaft 104 can smoothly rotate following the lens applying tool 106. Therefore, the middle lens material 111 cannot be held by the lens holding surface of the lens 200936307 in the lens processing. In order to achieve high-precision lens processing, it is preferable to hold the lens material during processing in the lens holding surface, but it is inconvenient in the conventional processing that the lens material cannot be held by the lens processing surface. An object of the present invention is to propose a lens processing apparatus which can solve such conventional problems. In order to solve the above problems, the present invention relates to a lens processing apparatus that presses a lens material on a processing surface of a rotating lens tool, and rotates the lens material while rotating the lens material. a cutting support, a honing process, or the like, comprising: a lens support shaft that can relatively move up and down with respect to the lens tool; and an outer cylinder that extends downward from a lower end surface of the lens support shaft in a coaxial state, and The inner side of the outer cylinder is disposed coaxially and coaxially supported by the outer cylinder in a state where only a predetermined amount is slidable in a direction toward a central axis of the lens support shaft, and coaxially on the inner d side of the inner cylinder a state in which the inner cylinder is supported by a rotating shaft that is rotatable around the central axis, a lens holder that is mounted coaxially at a lower end of the rotating shaft, and the inner cylinder facing downward with respect to the outer cylinder Pushed compression spring. Here, the lens processing apparatus of the present invention may be configured to include an inner peripheral side portion fixed to a lower end portion of the inner cylinder and a lower end portion of the outer cylinder that can be relatively moved upward by a predetermined amount along the central axis. The spring base of the outer peripheral side portion to be mounted in the state, and the pressure nut screwed to the outer peripheral surface portion of the upper end side of the outer cylinder -8-200936307. In this case, the inner cylinder is supported by the outer cylinder in a state where the inner cylinder is slidable only by a predetermined amount in the direction of the central axis by the spring base. Further, the pressure spring may be disposed between the pressure nut and the spring base in a state in which the outer cylinder is surrounded. In the lens processing apparatus of the present invention, the outer cylinder extending from the lower end of the lens support shaft toward the coaxial state is slidably disposed in the vertical direction so that the rotation shaft is rotatably disposed inside the outer cylinder, and is disposed on the outer cylinder. The outer compression spring applies lens processing pressure to the shaft. Moreover, the lens processing pressure can be changed by rotating the pressure nut to adjust the compression state of the pressure spring. As described above, in the present invention, since the lens processing pressure is not affected by the weight of the lens supporting shaft, a minute machining pressure can be applied to the lens holder, and fine adjustment of minute machining pressure is also possible. Further, since the inertial force generated by the lens supporting shaft does not act on the lens holder, the lens holder can instantaneously move up and down in accordance with the change in the processing pressure caused by the vibration or the like in the lens processing. Further, since the lens support shaft does not need to be lightened, the lens support shaft can have sufficient mechanical strength and rigidity to maintain the lens processing accuracy. In the lens processing apparatus of the present invention, the rotating shaft is a hollow rotating shaft, and a vacuum suction path that communicates with the hollow portion of the outer cylinder is formed from the lens holding surface of the lens holder via the hollow portion of the hollow rotating shaft. The communicating portion of the hollow portion of the hollow rotating shaft and the hollow portion of the outer cylinder is disposed with a sealing mechanism that rotatably supports the hollow rotating shaft in a state of being slidable in the vertical direction. -9- 200936307 According to this configuration, the lens to be processed can be sucked and held by the lens holding surface of the lens holder via the vacuum suction path. Moreover, with the sealing mechanism, the hollow shaft is rotatable and can slide up and down. Therefore, lens processing in a state where the lens lens holding surface is held by the suction is possible. [Effects of the Invention] In the lens processing apparatus of the present invention, since the lens processing pressure is not affected by the weight of the lens support shaft, a slight processing pressure can be applied to the lens holder, and the fine adjustment of the minute processing pressure becomes may. Further, since the inertial force generated by the lens supporting shaft does not act on the lens holder, the lens holder can be moved up and down instantaneously in accordance with the change in the machining pressure generated by the vibration or the like in the lens processing. Further, since the lens supporting shaft does not need to be lightweight, the lens supporting shaft can have sufficient mechanical strength and rigidity to maintain lens processing precision. [Embodiment] Hereinafter, an embodiment of a lens processing apparatus to which the present invention is applied will be described with reference to the drawings. Fig. 1 is a schematic block diagram showing the main part of the lens processing apparatus of the present embodiment, and the right half is shown by a cross section. The lens processing apparatus 1 has a basic configuration of a lens support shaft 3 that is vertically disposed, and a hollow shaft 4 is attached to the lens support shaft 3 via a lens pressurizing mechanism to be described later. The hollow shaft 4 is slidably mounted to the lens support shaft 3 so as to be rotatable about the center axis 2 thereof and in the direction of the center axis 2 (up and down direction - -10-200936307). In the lower end of the hollow shaft 4, the lens holder 5 is fixed downward in the coaxial state. The downward facing surface of the lens holder 5 is a curved lens holding surface 5a, and the lens material 6 for holding the object can be sucked and held. The lens adding tool 7 is opposed to the lens holding surface 5a from the lower side. The lens material 6 is transported to the position directly above the lens processing surface 7a of the lens applying tool 7 while being held by the lens holder 5, and the lens holding surface 5a and the lens plus of these lens holders are added. The lens processing surface 7a of the φ tool 7 is held by a predetermined processing pressure. In this state, the processing axis 7b of the lens tool 7 is honed and honed by the lens surface of the lens material 6 by rotation and oscillation. cut. The lens processing apparatus 1 is provided with a lens pressurizing mechanism for applying a machining pressure to the lens material 6. The lens pressurizing mechanism is configured as follows. A support shaft cylindrical portion 3b extending downward in a coaxial state is formed from the lower end surface 3a of the lens support shaft 3. The assembly pipe 11 having a circular cross section is fixed so as to surround the support shaft cylindrical portion 3b in a coaxial state. Further, an outer tube 12 having a circular cross section is fixed coaxially inside the support shaft cylindrical portion Φ 3b. The upper end portion 12a of the outer tube 12 is a lower end opening that is fitted and fixed to the lens support shaft 3. The support cylindrical portion 3b, the assembled tube 11, and the outer tube 12 constitute an outer tube assembly. The assembled tube 11 and the outer tube 12 extend downward from the lower end of the support shaft cylindrical portion 3b, and the lower end portions Hb and 12b are coupled to each other. A pressure nut 13 is screwed to the upper end portion of the outer peripheral surface of the assembled pipe 11. Further, a pressurizing spring 14 composed of a coil spring is disposed in a state in which the outer peripheral surface of the assembled pipe 11 is surrounded, and the upper end of the pressurizing spring 14 is pressed against the pressure nut 13 from the lower side by -11 - 200936307. Next, in the inner side of the outer tube 12, the inner tube 15 having a circular cross section is disposed in a slidable state in the coaxial state. Inside the inner tube 15, the hollow shaft 4 is coaxially supported in a rotatable state with the ball bearings 16 and 17 disposed at a position away from the center axis 2 (up and down). And a spring base 18 is fixed to the lower end of the inner tube 15. The spring base 18 is provided with a disk-shaped portion 18a having a center hole formed therein, and an annular portion 18b projecting upward from the inner peripheral edge of the disk-shaped portion 18a, and from the outer periphery of the disk-shaped portion 18a toward An annular portion 18c that protrudes above. The inner annular portion 18b' is screwed and fixed from the lower side of the inner peripheral surface portion of the lower end opening portion of the inner tube 15. The annular portion 18b and the hollow rotating shaft 4 are rotatable by the seal ring. It is blocked in a free state. In the outer annular portion 18c, a stopper mounting hole 18d extending in the radial direction is formed. A horizontal stopper 19 is inserted and fixed from the outside in this stopper mounting hole 18d. The inner end portion of the stopper 19 is inserted into a predetermined length of the engagement groove 12c in a state in which the lower end portion of the outer tube 12 is slidable in the vertical direction. Further, an annular seating surface 18e for placing the lower end of the pressure spring 14 is formed at the upper end portion of the outer annular portion 18c. Next, the lens processing apparatus 1 is provided with a vacuum suction path for vacuum-absorbing the lens material 6 on the lens holding surface 5a of the lens holder 5. This vacuum suction path is connected from the lens holding surface 5a via the hollow portion 4a of the hollow shaft 4 via the air tube 21 inserted into the lens supporting shaft 3, and is connected to a vacuum generating mechanism (not shown) -12 - 200936307. Here, the upper end portion 4b of the hollow rotating shaft 4 is surrounded by the upper end portion 12a of the outer tube 12 in the coaxial state. A meandering ring 22 is held between the outer peripheral surface portion of the upper end portion 4b and the inner peripheral surface portion of the upper end portion 12a. Further, in the upper end portion 12a of the outer tube 12, an annular projection 12d projecting inwardly is formed, and an annular segment surface 12e is formed in the upper side thereof, and the O-ring can be moved up and down between the two. twenty two. With the sealing mechanism thus constituted, the φ hollow shaft 4 is held in a state of being rotatably and slidable up and down. Further, the small-diameter connecting pipe portion 12f protrudes upward from the upper end of the upper end portion 12a of the outer tube 12. The air tube 21 is inserted and fixed from the upper side to the connecting tube portion 12f as needed. By arranging the air tube 21, a vacuum suction path is formed. In the lens processing apparatus 1 configured as described above, the support shaft cylindrical portion 3b of the lens support shaft 3 is attached from the lower side; the assembly tube 11, the outer tube 12, the pressure nut 13, and the pressure spring 14 are formed. Lens pressurizing mechanism. The φ assembly: the inner tube 15, the spring base 18, the hollow shaft 4, and the shaft assembly composed of the ball bearings 16, 17 are inserted into the lens pressurizing mechanism from below, and the stopper 19 is inserted into the outer tube 12 The engaging groove 12c fixes the rotating shaft assembly so as not to fall off or rotate. The inner tube 15 is slidable up and down without resistance in the outer tube 12. Further, by rotating the pressure nut 13 attached to the outer circumference of the assembly pipe U to adjust its position up and down, the amount of compression of the pressure spring 14 can be adjusted. The pressurizing spring 14 presses the shaft assembly downwardly via the spring base 18. Therefore, by the pressurizing spring 14, the processing pressure for pressing the lens holder 5 -13 - 200936307 and the lens material 6 against the lens applying tool 7 can be caused, and by rotating the pressure nut 13, the pressing pressure can be adjusted. Further, when it is necessary to hold the lens by the vacuum suction, the air tube 21 is inserted into the connecting tube portion 12f at the upper end portion of the outer tube 12 to form the vacuum suction path shown in Fig. 1, and the external one is not shown. The vacuum generating mechanism can perform vacuum suction. [Effects of the embodiment] According to the lens processing apparatus 1 configured as described above, the processing pressure during processing can be finely adjusted, and deformation due to the processing pressure of the lens having a small diameter and a lens having a small thickness can be prevented, and the deformation can be prevented. The deformation caused by the heat generated by the excessive friction between the lens material 6 and the lens adding tool 7. Further, since a small and lightweight hinge assembly can be constructed, the inertial force acting on the lens holder 5 can be reduced. As a result, the shock generated by the vibration or the like can instantaneously move the lens holder 5 up and down. Therefore, since the lens material 6 and the lens applying tool 7 can be kept in close contact with each other, the lens applying tool 7 can be prevented from being worn and damaged, and the processing accuracy and the processing quality can be improved. Further, since the self-weight of the lens support shaft 3 does not act as a machining pressure, the weight of the lens support shaft 3 is not limited. Therefore, it is possible to mount a lens support shaft having a high mechanical strength and rigidity to facilitate the precision of lens processing. Further, in the conventional structure, the lens support shaft is a structure that slides up and down. When the lens support shaft and the bearing wear cause the lens processing precision to change -14 to 200936307, the repair must be performed by a specialized technician. And it takes a lot of time and money. According to this example, since only the outer tube 12 and the inner tube 15 can be exchanged, it can be repaired by the user, and the repair time and the repair cost are also small. Further, since the lens material 6 can be vacuum-absorbed to the lens holder 5 in the lens processing, the lens of the unstable shape can be processed with high precision. Further, it is not necessary to use a machined part such as a conventional vacuum tube for vacuum suction, and a mechanism for moving the vacuum tube up and down is not required. Since the air tube 21 can be used as a component that is inexpensive and easily available, it is easy to arrange parts by the user, and the exchange work can be performed without special techniques. BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1] A schematic configuration diagram of a lens processing apparatus to which the present invention is applied. [Fig. 2] A schematic configuration diagram of a conventional lens processing apparatus.
【主要元件符號說明】 1 :透鏡加工裝置 2 :中心軸線 3 :透鏡支撐軸 3a :下端面 3b :支撐軸圓筒部 4 :中空轉軸 4a :中空部 -15- 200936307 4b :上端部 5 :透鏡保持具 5a :透鏡保持面 6 :透鏡素材 7 :透鏡加工具 7 a :透鏡加工面 7b :加工軸 1 1 :組裝管 lib :下端部分 1 2 :外管 12a :上端部 1 2 c :卡合溝 12d :圓環狀突起 12e :段面 12f :連結管部分 13 :壓力螺帽 1 4 :加壓彈簧 15 :內管 16，1 7 :滾珠軸承 1 8 :彈簧基座 18a :圓盤狀部分 18b :圓環狀部分 18c :圓環狀部分 18d :停止器安裝孔 -16- 200936307 18e :座面 19 :停止器 21 :空氣管 22 : Ο形環 100:透鏡加工裝置 1 0 1 :中心軸線 1 0 2 :透鏡支撐軸 0 103 :軸承 1 〇4 :中空轉軸 105 :透鏡保持具 1 〇 6 :透鏡加工具 1 0 6 a :加工面 1 0 6 b :中心軸線 1 1 0 :透鏡素材 1 1 0 :軸承 〇 111 :透鏡素材 1 12 :真空管 1 1 3 : Ο形環[Description of main components] 1 : Lens processing device 2 : Center axis 3 : Lens support shaft 3 a : Lower end surface 3 b : Support shaft cylindrical portion 4 : Hollow shaft 4 a : Hollow portion -15 - 200936307 4b : Upper end portion 5 : Lens Holder 5a: lens holding surface 6: lens material 7: lens adding tool 7a: lens processing surface 7b: processing shaft 1 1 : assembly tube lib: lower end portion 1 2 : outer tube 12a: upper end portion 1 2 c : engagement Groove 12d: annular projection 12e: segment surface 12f: coupling pipe portion 13: pressure nut 14: pressure spring 15: inner pipe 16, 1 7: ball bearing 18: spring base 18a: disk-shaped portion 18b: annular portion 18c: annular portion 18d: stopper mounting hole-16-200936307 18e: seat surface 19: stopper 21: air tube 22: Ο ring 100: lens processing device 1 0 1 : central axis 1 0 2 : Lens support shaft 0 103 : Bearing 1 〇 4 : Hollow shaft 105 : Lens holder 1 〇 6 : Lens plus tool 1 0 6 a : Machined surface 1 0 6 b : Center axis 1 1 0 : Lens material 1 1 0 : bearing 〇 111 : lens material 1 12 : vacuum tube 1 1 3 : Ο ring