201026979 六、發明說明： 【發明所屬之技術領域】 本發明，是有關於：抑制朝被配置在盤形滾刀、轉輪 裝置等的機器的內側的旋轉滑動部的土壓的傳播的土壓傳 播抑制環體及其安裝構造、以及裝設有其土壓傳播抑制環 體的盤形滾刀及轉輪裝置。 β 【先前技術】 一般，被裝設於隧道機械的裁刀頭的盤形滾刀、和被 裝設於推土機等的建設機械的轉輪裝置，是被使用在與土 砂、泥、水等接觸的場所，在這些裝置的軸旋轉部中，爲 了防止那些土砂、泥、水等侵入，並且防止被充塡在內部 的潤滑油和油的漏出，而裝設有浮動密封。且，爲了減少 此浮動密封的密封面的由侵入土砂所產生的損傷，而在浮 動密封的外側設置迷宮部，使土砂等的異物不易侵入浮動 ® 密封（日本實開平5-9005 1號公報參照）。 進一步，爲了更抑制朝浮動密封的土砂的侵入，而在 迷宮部設置補助密封的構造（日本專利第2939924號公報 參照）。 但是，在如此設置補助密封的構造中，補助密封的滑 接面的面粗度有需要非常地小，通常有需要將表面機械加 工使面粗度成爲1.6S〜6.3S程度。 進一步，補助密封爲了發揮密封功能而有需要密封的 過盈量（壓縮量），但是藉由此密封過盈量會導致密封滑 -5- 201026979 動時阻力產生，旋轉阻力會變大。例如盤形滾刀的情況， 起動扭矩會變大，而具有裁刀的偏摩耗容易產生的問題點 〇 又，也考慮取代在日本專利第2939924號公報中所揭 示的補助密封的〇形環，使用耐久性較高的金屬密封。但 是此情況，在密封的滑接面使用硬度非常高的材料的話， 滑接面的面粗度有需要精度更佳（通常是0.05S〜0.8S以 下）地精整完成，製作成本會更增大。 @ 本發明，是有鑑於如前述的問題點，其目的是提供一 種土壓傳播抑制環體及其安裝構造、及裝設有該環體的盤 形滾刀及轉輪裝置，使滑接面的面粗度精度不需要很高， 不會加大旋轉阻力，可以提高被配置在內側的浮動密封等 的密封的壽命。 【發明內容】 爲了達成前述目的，第1發明的土壓傳播抑制環體， 〇 是被裝設在彼此之間相對旋轉的將環體裝設的第1對象物 及該第1對象物的對方側也就是第2對象物的相面對的壁 面之間，抑制朝被配置於比前述環體的裝設部更內側的旋 轉滑動部的土壓的傳播的環體，其特徵爲：前述環體’是 具備：由將該環體保持在前述第1對象物用的彈性體所形 成第1環部、及被固定在前述第1環部的側面且在前述第 2對象物之間可相對旋轉的由金屬所形成第2環部’前述 第2環部的表面粗度，是即使在該第2環部與前述第2對 -6- 201026979 象物接觸的狀態下也容許漏水的程度的面粗度。 對於前述第1發明，前述第2環部的表面的面粗度是 1 2.5 S以上即可（第2發明）。 且，第3發明的土壓傳播抑制環體的安裝構造，是第 1發明或是第2發明的土壓傳播抑制環體的安裝構造，其 特徵爲：在前述第2環部的至少徑方向壁面及與其相面對 的前述第2對象物的壁面之間具有微小間隙，此微小間隙 ® ，是容許相面對的壁面的機械加工誤差的最小限度的間隙 〇 且，第4發明的盤形滾刀，是裝設有第1發明或是第 2發明的土壓傳播抑制環體的盤形滾刀，其特徵爲：具有 :設成裁刀環的輪轂、及將前述輪轂可旋轉自如地支撐的 軸、及將前述軸不可旋轉地支撐的保持架，前述第1對象 物’是前述保持架側構件及前述輪轂側構件的任一方，前 述第2對象物，是前述保持架側構件及前述輪轂側構件的 ®任一另一方。 進一步’第5發明的轉輪裝置，是裝設有第1發明或 是第2發明的土壓傳播抑制環體的轉輪裝置，其特徵爲： 具有：滾子、及將前述滾子可旋轉自如地支撐的軸、及將 前述滾子不可旋轉地支撐的托架，前述第1對象物，是前 述托架側構件及前述滾子側構件的任一方，前述第2對象 物’是前述托架側構件及前述滾子側構件的任一另一方。 依據第1發明，與將環體裝設的第1對象物的對方側 也就是第2對象物滑接或是相面對的部分是由金屬所形成 201026979 的第2環部所構成，此第2環部因爲被固定於由彈性體所 形成的第1環部，所以由第2對象物的零件公差及組裝公 差所產生的尺寸的參差不一可由第1環部吸收，可以追從 旋轉部的動作。且在第2環部的滑接部或是相面對部不需 要如鏡面加工的特殊的加工精度，就可以抑制朝被配置在 內側的旋轉滑動部的土壓的傳播。且，設有補助密封的情 況也不會增大旋轉阻力。 進一步，因爲構成第2環部的金屬的表面粗度，是即 @ 使在與第2對象物接觸的狀態下也容許漏水的程度的面粗 度即可，硬度也可以使用比較低的材料，所以加工容易且 可以便宜地製作。 第2發明，是藉由將第1發明中的第2環部的表面粗 度由具體的數値顯示來特定發明。依據第2發明，因爲構 成第2環部的金屬的表面粗度是12.5S以上即可，硬度也 可以使用比較低的材料，所以加工容易可以便宜地製作。 .本發明的土壓傳播抑制環體，是使用於如盤形滾刀（ © 第4發明）和轉輪裝置（第5發明）的土壓作用的環境下 ，且特別適用於只有藉由外力才可旋轉（即自己無法能動 地旋轉）裝置。 【實施方式】 接著，對於本發明的土壓傳播抑制環體、盤形滾刀及 轉輪裝置的具體的實施例，一邊參照圖面一邊說明。 201026979 [第1實施例] 在第1圖中，顯示本發明的第1實施例的盤形滾刀的 剖面圖，在第2圖中，顯示第1圖的A部擴大圖。且，在 第3圖中，顯示本實施例中的環體的立體圖。 本實施例，是顯示適用在被裝設於隧道控削機的裁刀 頭的盤形滾刀的例。本實施例的盤形滾刀1，是具備：被 安裝於無圖示的裁刀頭的一對的保持架2、2、及藉由螺絲 ^ 3被固定在這些保持架2、2的軸4。在軸4的外周中隔著 軸承5、5使輪轂6可旋轉自如地被支撐，裁刀環7是不 可旋轉地被支撐在輪轂6的外周。又，輪轂及裁刀環是一 體形成也可以。 在前述輪轂6的內周側的外端部中嵌入有環狀的隔片 8、8，對於輪轂6不可旋轉且水密地被固定。此隔片8、8 的內周側的端部是朝向外方突出形成，此突出部8A是被 配羃成進入相面對於其的保持架2的凹部2A內。且，在 隔片8的突出部8A的內周壁及保持架2的凹部2A的內 周壁之間裝設有作爲主密封的浮動密封9。此浮動密封9 ’是由··具有彼此之間滑接的密封面的一對的密封環9a、 9a;及各別挾持一方的密封環9a的外周面及保持架2之 間、在另一方的密封環9a的外周面及隔片8之間的一對 〇形環9b、9b所構成，容許對於保持架2的隔片8(輪轂 6)的旋轉，且可發揮密封功能。 前述浮動密封9的外周側，且在固定側也就是保持架 2、及旋轉側也就是輪轂6及隔片8之間，設有迷宮，在 -9- 201026979 此迷宫的途中裝設有本發明的土壓傳播抑制環體（以下， 稱爲「環體」）10。以下，說明此環體10的詳細構造。 如第2圖所示，前述環體10，是裝設於：形成於保持 架2的外周部的突出部2B的內周壁2a、及形成於與隔片 8的突出部8A的外周壁8a之間的環狀空間11。此環體 10，是由：由彈性體所形成的剖面矩形狀的第1環部12、 及在此第1環部12的側壁12a使其側壁13a由加硫接合 而被固定的由金屬材所形成剖面矩形狀的第2環部13所 @ 構成。在此，第1環部12的外徑是比第2環部13的外徑 稍大形成，且使兩者被固定而被一體化。又，彈性體是使 用例如硬度5 5 0的丁腈橡膠。且，金屬材是例如SS400材 即可，其表面粗度是50S〜100S程度即可。即，本實施例 的環體1〇所使用的金屬材是與習知的金屬密封相比硬度 較低的低級材料即可，且因爲表面粗度較粗也可以，所以 加工容易可以非常便宜地製作。 第1環部12的外周壁12b及未被加硫接合側的側壁 Q 12c是藉由被嵌入與保持架2的突出部2B的內周壁2a及 其內周壁2a連設的階段部2C的側壁2c，使環體10被保 持於保持架2。即，環體10，是藉由第1環部12彈性地 被保持在保持架2。且，在第1環部12的內周壁12d及隔 片8的突出部8A的外周壁8a之間設有所需的間隙Cj ( 本實施例中爲1mm程度的間隙）而形成迷宮的一部分。 且，在第2環部13的外周壁13b及與其相面對的保持架2 的突出部2B的內周壁2a之間是形成有微小間隙，在 -10- 201026979 內周壁13c及與其相面對的隔片8的突出部8A的外周壁 8a之間也形成有微小間隙C2，使滑動阻力不會產生。此 微小間隙C2，是對應由零件公差、組裝公差所產生的尺寸 的參差不一來確保朝第2環部13的徑方向的動作量用的 間隙，具有容許相面對的壁面的機械加工誤差的最小限度 的大小，在本實施例中被設定成0.1mm程度。 對於此，在第2環部1 3的未被加硫接合側的側壁1 3 d Φ 、及與其相面對的隔片8的外側壁8b之間，在本實施例 中設有0.5mm的微小間隙C3，防止由環體10的裝設所產 生的輪轂6(隔片8)的旋轉阻力的增大。又，不設置此 微小間隙，而使C3在名目上成爲0的方式設定也可以。 此情況，在名目値中在隔片8及環體10之間是被設定成 無過盈量也無間隙，防止由環體10的裝設所產生的輪轂6 (隔片8)的旋轉阻力的增大。 在此，如前述，構成前述第2環部13的金屬材的面 ® 粗度是50S〜100S即可，至少不需要精整完成至12.5S以 下。且，與第2環部13相面對的隔片8的側壁13d的面 粗度也是50S〜100S程度即可。因此，在此第2環部13 的內側壁〗3d及隔片8的外側壁8b之間是具有〇.5mm的 微小間隙，可容許漏水（無止水功能）。且，即使將微小 間隙在名目上設定成0的情況，名目上雖接觸，但是即使 在此狀態也容許漏水（無止水功能）。又，在本實施例中 ，在保持架2的突出部2B的側壁2b及隔片8的側壁8b 之間所形成的迷宮的間隙是被設定在2mm程度，在隔片8 -11 - 201026979 的突出部8A的側壁8c及與其相面對的保持架2的側壁 2d之間所形成的迷宮的間隙是被設定在3mm程度。 依據本實施例的環體10，將環體10裝設的第1對象 物也就是保持架2的裝設面、第1對象物的對方側也就是 第2對象物也就是隔片8的對抗面，皆只要50S〜100S程 度的面粗度加工即可，與通常的旋轉密封的接觸面的面粗 度是1.6S〜6.3S的精整完成相比，加工可以大幅地簡素化 。且’也可防止由環體10的裝設所產生的旋轉阻力的增 ❹ 大。 又，保持架2及隔片8(輪轂6)的軸方向中的相對 位置，爲了軸承5的預裝載調整，對於名目尺寸多有大偏 離。即使這種的情況，其偏離也可由第1環部12的彈性 變形吸收。 在第4圖中，顯示前述第1實施例的變形例的盤形滾 刀的剖面圖。 在前述第1實施例中，雖說明了將環體10固定於固 Θ 定側也就是保持架2的例，但是在本變形例的盤形滾刀1’ 中，顯示將環體10固定於旋轉側也就是隔片8'的例。因 此，保持架2'、隔片8'的形狀的部分及環體10被旋轉的 部分是與前述第1實施例不同被，是對於其以外的部分基 本上是與第1實施例者相同。因此，與第1實施例相同或 是對應的部分是在圖中附加同一符號並省略其詳細的說明 。如此無論環體1〇是裝設在固定側、或裝設在旋轉側， 皆可達成同樣的作用效果。 -12- 201026979 在上述第1實施例和其變形例中，朝輪轂6內的軸承 5的組裝的關係上，將隔片8或是隔片8'固定在輪轂6, 在隔片8或是8'及保持架2之間設置環體1〇。但是，隔片 8，8’非需要的情況時，在輪轂6及保持架2之間設置環體 10即可。且’相反地，雖也可考慮在保持架將隔片固定的 構造，但是此情況，在輪轂及隔片之間設置環體10即可 。在本發明中「輪轂側構件」，是輪轂本身，或是包含被 • 固定於輪轂的隔片等的輪轂以外的構件。且，在本發明中 「保持架側構件」，是保持架本身，或是包含被固定於保 持架的隔片等的保持架以外的構件。 [第2實施例] 在第5圖中，顯示本發明的第2實施例的轉輪裝置的 剖面圖。本實施例’是顯示適用在推土機等的建設機械的 轉輪裝置的例。 ^ 本實施例的轉輪裝置20，是具備：不可旋轉地設置在 車體側的托架21、及不可旋轉地被支撐在此托架21的軸 22、及隔著軸承23可旋轉地被支撐在此軸22的滾子24， 藉由此滾子24導引無圖示的帶。在托架21及滾子24之 間裝設有的浮動密封25’防止土砂的侵入，並且防止被充 塡在軸周圍的油的漏出。 在前述浮動密封25的外周側中形成有迷宮，在其迷 宮裝設有本發明的環體10。此環體10的構造，是與前述 第1實施例同樣，由：被固定在托架2 1的由彈性體所形 -13- 201026979 成的第1環部12、及被固定在此第1環部12的由金屬材 所形成的第2環部1 3所構成。 本實施例，也可達成與第1實施例同樣的作用效果。 當然，此環體10，不是裝設在托架21側，而是裝設在滾 子24側也可以。在本發明中「托架側構件」，是托架本 身，或是包含被固定於托架的隔片等的托架以外的構件。 且，在本發明中「滾子側構件」，是滾子本身，或是包含 被固定於滾子的隔片等的滾子以外的構件。 @ 本發明的環體10，當然也可適用在上述的盤形滾刀和 轉輪以外的各種的裝置。 [產業上的利用可能性】 本發明的土壓傳播抑制環體，是特別適用於被裝設於 隧道機械的裁刀頭的盤形滾刀、和推土機等的建設機械的 轉輪裝置。 【圖式簡單說明】 第1圖是本發明的第1實施例的盤形滾刀的剖面圖。 第2圖是第1圖的A部擴大圖。 第3圖是本實施例中的環體的立體圖。 第4圖是第1實施例的變形例的盤形滾刀的剖面圖。 第5圖是本發明的第2實施例的轉輪裝置的剖面圖。 【主要元件符號說明】 -14- 201026979 1 :盤形滾刀[Technical Field] The present invention relates to a soil pressure that suppresses the propagation of earth pressure to a rotary sliding portion disposed inside a machine such as a disk hob or a reel device. The propagation suppression ring body and its mounting structure, and a disk hob and a wheel device equipped with the earth pressure transmission suppression ring body. β [Prior Art] Generally, a disc hob mounted on a cutting head of a tunnel machine and a turning device mounted on a construction machine such as a bulldozer are used in contact with earth, mud, water, and the like. In the shaft rotating portion of these devices, a floating seal is provided in order to prevent intrusion of dirt, mud, water, and the like, and to prevent leakage of lubricating oil and oil which are filled inside. In addition, in order to reduce the damage caused by the intrusion of the sand to the sealing surface of the floating seal, a labyrinth portion is provided on the outer side of the floating seal, so that foreign matter such as soil sand is less likely to invade the floating® seal (Japanese Patent Publication No. 5-9005 No. 1 ). Further, in order to further suppress the intrusion of the earth-sand to the floating seal, a structure in which the auxiliary seal is provided in the labyrinth portion is referred to (refer to Japanese Patent No. 2939924). However, in the structure in which the auxiliary seal is provided in this manner, the surface roughness of the sliding surface of the auxiliary seal needs to be extremely small, and it is usually necessary to mechanically machine the surface so that the surface roughness becomes 1.6S to 6.3S. Further, the auxiliary seal has a need to seal the amount of interference (compression amount) in order to exert a sealing function, but by this sealing the interference amount, the sealing slip occurs, and the rotational resistance becomes large. For example, in the case of a disk hob, the starting torque is increased, and there is a problem that the partial wear of the cutting blade is likely to occur, and it is also considered to replace the auxiliary sealing ring disclosed in Japanese Patent No. 2939924. Use a more durable metal seal. However, in this case, if a material having a very high hardness is used on the sliding surface of the seal, the surface roughness of the sliding surface needs to be finished with a higher precision (usually 0.05 S to 0.8 S or less), and the manufacturing cost is increased. . The present invention has been made in view of the above problems, and an object thereof is to provide a earth pressure propagation suppression ring body and a mounting structure thereof, and a disk hob and a wheel device equipped with the ring body to make a sliding surface The surface roughness accuracy does not need to be high, and the rotation resistance is not increased, and the life of the seal such as the floating seal disposed inside can be improved. In order to achieve the above object, the earth pressure propagation suppression ring body according to the first aspect of the invention is a first object to be attached to the ring body and a counterpart of the first object to be mounted to rotate relative to each other. The side is a ring body that suppresses the propagation of the earth pressure to the rotating sliding portion disposed inside the mounting portion of the ring body between the facing wall surfaces of the second object, and is characterized in that the ring is The body ' includes a first ring portion formed of an elastic body for holding the ring body in the first object, and a side surface fixed to the first ring portion and opposite to each other between the second object The surface roughness of the second ring portion formed by the metal, which is formed by the metal, is such that the second ring portion is allowed to leak in a state in which the second ring portion is in contact with the second pair of -6 to 201026979. Surface roughness. In the first invention, the surface roughness of the surface of the second ring portion is 12.5 S or more (second invention). The attachment structure of the earth pressure propagation suppression ring body according to the third aspect of the invention is the attachment structure of the earth pressure propagation suppression ring body according to the first aspect or the second aspect of the invention, characterized in that at least the radial direction of the second ring portion is A small gap is formed between the wall surface and the wall surface of the second object facing the wall surface, and the minute gap ® is a minimum gap which allows machining errors of the facing wall surfaces, and the disc shape of the fourth invention The hob is a disk hob equipped with the earth pressure transmission suppression ring of the first invention or the second invention, and has a hub provided as a cutter ring and rotatably and rotatably a support shaft and a holder for non-rotatably supporting the shaft, wherein the first object 'is one of the holder side member and the hub side member, and the second object is the holder side member and Any one of the aforementioned hub side members. Further, the reel device according to the fifth aspect of the invention is the reel device in which the earth pressure propagation suppression ring body according to the first aspect or the second aspect of the invention is provided, comprising: a roller, and the roller is rotatable The first object to be supported is a bracket that is non-rotatably supported by the roller, and the first object is one of the bracket side member and the roller side member, and the second object is the aforementioned bracket Any one of the shelf side member and the aforementioned roller side member. According to the first aspect of the invention, the portion facing the second object that is attached to the ring body, that is, the second object, is the second ring portion of the 201026979 formed by the metal. Since the second ring portion is fixed to the first ring portion formed of the elastic body, the difference in the size due to the component tolerance and the assembly tolerance of the second object can be absorbed by the first ring portion, and the rotation portion can be traced. Actions. Further, in the sliding portion or the facing portion of the second ring portion, the special machining accuracy such as mirror processing is not required, and the propagation of the earth pressure to the rotary sliding portion disposed inside can be suppressed. Moreover, the presence of a subsidized seal does not increase the rotational resistance. Further, the surface roughness of the metal constituting the second ring portion is a thickness of the surface which allows the water to leak in a state in which the second object is in contact with the second object, and a relatively low material can be used for the hardness. Therefore, the processing is easy and can be produced inexpensively. According to a second aspect of the invention, the surface roughness of the second ring portion in the first invention is indicated by a specific number. According to the second aspect of the invention, since the surface roughness of the metal constituting the second ring portion is 12.5 S or more, a relatively low material can be used for the hardness, so that the processing can be easily performed at a low cost. The earth pressure propagation suppressing ring body of the present invention is used in an environment of earth pressure such as a disk hob (© 4th invention) and a reel device (5th invention), and is particularly suitable for use only by an external force. It can be rotated (that is, it cannot rotate by itself). [Embodiment] Next, a specific embodiment of the earth pressure propagation suppression ring body, the disk hob, and the runner device of the present invention will be described with reference to the drawings. [First Embodiment] Fig. 1 is a cross-sectional view showing a disk hob according to a first embodiment of the present invention, and in Fig. 2, an enlarged view of a portion A in Fig. 1 is shown. Further, in Fig. 3, a perspective view of the ring body in the present embodiment is shown. This embodiment is an example of a disc hob which is applied to a cutter head attached to a tunnel cutter. The disc hob 1 of the present embodiment includes a pair of holders 2, 2 attached to a cutter head (not shown), and shafts fixed to the holders 2, 2 by screws 3 4. The hub 6 is rotatably supported by the bearings 5, 5 on the outer circumference of the shaft 4, and the cutter ring 7 is rotatably supported on the outer circumference of the hub 6. Further, the hub and the cutter ring may be formed integrally. Annular spacers 8 and 8 are fitted into the outer end portion of the inner peripheral side of the hub 6, and the hub 6 is non-rotatably and watertightly fixed. The end portions on the inner circumferential side of the spacers 8, 8 are formed to protrude outward, and the projections 8A are fitted into the recesses 2A of the holder 2 to which the facing faces are formed. Further, a floating seal 9 as a main seal is provided between the inner peripheral wall of the protruding portion 8A of the spacer 8 and the inner peripheral wall of the recess 2A of the holder 2. The floating seal 9' is a pair of seal rings 9a, 9a having a sealing surface that is slidably coupled to each other; and between the outer peripheral surface of the seal ring 9a and the holder 2, and the other side The outer peripheral surface of the seal ring 9a and the pair of 〇-shaped rings 9b and 9b between the spacers 8 are provided, and the rotation of the spacer 8 (hub 6) of the holder 2 is allowed, and the sealing function can be exhibited. The outer peripheral side of the floating seal 9 and the fixed side, that is, the cage 2, and the rotating side, that is, between the hub 6 and the spacer 8, are provided with a labyrinth, and the invention is installed on the way of the labyrinth of -9-201026979 The earth pressure transmission suppresses the ring body (hereinafter referred to as "ring body") 10 . Hereinafter, the detailed structure of the ring body 10 will be described. As shown in Fig. 2, the ring body 10 is mounted on the inner peripheral wall 2a of the protruding portion 2B formed on the outer peripheral portion of the holder 2, and the outer peripheral wall 8a formed on the protruding portion 8A of the spacer 8. The annular space 11 between. The ring body 10 is composed of a first ring portion 12 having a rectangular cross section formed of an elastic body, and a metal material fixed to the side wall 12a of the first ring portion 12 by vulcanization bonding. The second ring portion 13 having a rectangular cross section is formed by @. Here, the outer diameter of the first ring portion 12 is formed to be slightly larger than the outer diameter of the second ring portion 13, and the both are fixed and integrated. Further, the elastomer is a nitrile rubber having a hardness of, for example, 550. Further, the metal material is, for example, an SS400 material, and the surface roughness thereof may be about 50S to 100S. That is, the metal material used in the ring body 1 of the present embodiment may be a lower-grade material having a lower hardness than a conventional metal seal, and since the surface roughness is coarse, the processing is easy and can be very inexpensive. Production. The outer peripheral wall 12b of the first ring portion 12 and the side wall Q12c on the side not to be vulcanized joined are the side walls of the step portion 2C that are inserted into the inner peripheral wall 2a of the protruding portion 2B of the holder 2 and the inner peripheral wall 2a thereof. 2c, the ring body 10 is held by the holder 2. That is, the ring body 10 is elastically held by the first ring portion 12 in the holder 2. Further, a required gap Cj (a gap of about 1 mm in the present embodiment) is provided between the inner peripheral wall 12d of the first ring portion 12 and the outer peripheral wall 8a of the protruding portion 8A of the spacer 8, and a part of the labyrinth is formed. Further, a small gap is formed between the outer peripheral wall 13b of the second ring portion 13 and the inner peripheral wall 2a of the protruding portion 2B of the holder 2 facing the second ring portion 13, and the inner peripheral wall 13c faces the -10-201026979 A small gap C2 is also formed between the outer peripheral walls 8a of the protruding portions 8A of the spacers 8, so that the sliding resistance does not occur. The small gap C2 is a gap for ensuring the amount of movement in the radial direction of the second ring portion 13 in accordance with the difference in the size of the component tolerance and the assembly tolerance, and has a machining error that allows the facing wall surface. The minimum size is set to about 0.1 mm in this embodiment. In this case, between the side wall 1 3 d Φ of the second ring portion 13 not on the vulcanization side and the outer side wall 8 b of the spacer 8 facing the same, in the present embodiment, 0.5 mm is provided. The minute gap C3 prevents an increase in the rotational resistance of the hub 6 (the spacer 8) caused by the attachment of the ring body 10. Further, it is also possible to set C3 to be 0 in the name without setting such a small gap. In this case, in the case 名, the gap between the spacer 8 and the ring body 10 is set to have no interference and no gap, and the rotation resistance of the hub 6 (separator 8) generated by the installation of the ring body 10 is prevented. Increase. Here, as described above, the surface of the metal material constituting the second ring portion 13 has a thickness of 50S to 100S, and at least the finishing is not required to be completed up to 12.5S. Further, the surface roughness of the side wall 13d of the spacer 8 facing the second ring portion 13 may be about 50S to 100S. Therefore, a small gap of 〇.5 mm is provided between the inner side wall 3d of the second ring portion 13 and the outer side wall 8b of the spacer 8, and water leakage (no water stopping function) can be tolerated. In addition, even if the minute gap is set to 0 in the name, the name is contacted, but even in this state, water leakage is allowed (no water stop function). Further, in the present embodiment, the gap of the labyrinth formed between the side wall 2b of the protruding portion 2B of the holder 2 and the side wall 8b of the spacer 8 is set to about 2 mm, in the spacer 8 -11 - 201026979 The gap of the labyrinth formed between the side wall 8c of the protruding portion 8A and the side wall 2d of the holder 2 facing it is set to about 3 mm. According to the ring body 10 of the present embodiment, the first object to be attached to the ring body 10 is the mounting surface of the holder 2, and the other object side of the first object is the second object, that is, the spacer 8 The surface can be processed with a surface roughness of about 50S to 100S, and the processing can be greatly simplified compared to the finishing of the surface of the normal rotary sealing contact surface of 1.6S to 6.3S. Further, it is also possible to prevent an increase in the rotational resistance caused by the attachment of the ring body 10. Further, the relative position in the axial direction of the cage 2 and the spacer 8 (hub 6) is largely deviated from the nominal size for the preloading adjustment of the bearing 5. Even in such a case, the deviation can be absorbed by the elastic deformation of the first ring portion 12. Fig. 4 is a cross-sectional view showing a disk cutter of a modification of the first embodiment. In the first embodiment, the example in which the ring body 10 is fixed to the fixed side, that is, the retainer 2 has been described. However, in the disk hob 1' of the present modification, the ring body 10 is fixed to the ring body 10. The rotating side is also an example of the spacer 8'. Therefore, the portion of the shape of the holder 2' and the spacer 8' and the portion where the ring body 10 is rotated are different from those of the first embodiment described above, and the other portions are basically the same as those of the first embodiment. Therefore, the same or corresponding portions as those in the first embodiment are denoted by the same reference numerals and the detailed description thereof will be omitted. In this way, the same effect can be achieved regardless of whether the ring body 1 is mounted on the fixed side or on the rotating side. -12- 201026979 In the first embodiment and its modifications described above, the spacer 8 or the spacer 8' is fixed to the hub 6 in the assembly of the bearing 5 in the hub 6, and the spacer 8 is either A ring body 1〇 is provided between the 8' and the cage 2. However, when the spacers 8, 8' are not required, the ring body 10 may be provided between the hub 6 and the holder 2. Further, conversely, a structure in which the spacer is fixed to the holder may be considered. However, in this case, the ring body 10 may be provided between the hub and the spacer. In the present invention, the "hub side member" is a hub itself or a member other than a hub that is fixed to a spacer of the hub or the like. Further, in the present invention, the "cage side member" is a holder itself or a member other than the holder that is fixed to the spacer of the holder. [Second embodiment] Fig. 5 is a cross-sectional view showing a rotary wheel device according to a second embodiment of the present invention. This embodiment is an example of a wheel device that is applied to a construction machine such as a bulldozer. The reel device 20 of the present embodiment includes a bracket 21 that is non-rotatably provided on the vehicle body side, a shaft 22 that is non-rotatably supported by the bracket 21, and is rotatably coupled via a bearing 23 The roller 24 supported on the shaft 22 guides the belt (not shown) by the roller 24. The floating seal 25' provided between the bracket 21 and the roller 24 prevents intrusion of soil sand and prevents leakage of oil that is filled around the shaft. A labyrinth is formed in the outer peripheral side of the floating seal 25, and the ring body 10 of the present invention is mounted on the lost palace. The structure of the ring body 10 is the first ring portion 12 which is fixed to the bracket 2 1 by the elastic body 13-201026979, and is fixed to the first one as in the first embodiment. The ring portion 12 is composed of a second ring portion 13 formed of a metal material. Also in this embodiment, the same operational effects as those of the first embodiment can be achieved. Of course, the ring body 10 may be attached to the side of the bracket 21, or may be attached to the side of the roller 24. In the present invention, the "bracket side member" is a member of the bracket itself or a member other than the bracket that is fixed to the spacer of the bracket or the like. Further, in the present invention, the "roller side member" is a roller itself or a member other than a roller including a spacer fixed to the roller. The ring body 10 of the present invention can of course be applied to various devices other than the disk hob and the above-mentioned wheel. [Industrial Applicability] The earth pressure propagation suppression ring of the present invention is particularly suitable for use in a disc hob mounted on a cutting head of a tunnel machine, and a turning device for a construction machine such as a bulldozer. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a disk hob according to a first embodiment of the present invention. Fig. 2 is an enlarged view of a portion A of Fig. 1. Fig. 3 is a perspective view of the ring body in the present embodiment. Fig. 4 is a cross-sectional view showing a disk hob according to a modification of the first embodiment. Fig. 5 is a cross-sectional view showing a reel device according to a second embodiment of the present invention. [Main component symbol description] -14- 201026979 1 : Disc hob
2 ·’保持架 2A :凹部 2a :內周壁 2B :突出部 2b :側壁 2C :階段部 2c :側壁 2d :側壁 3 :螺絲 4 :軸 5 :軸承 6 :輪轂 7 :裁刀環 8 :隔片 8a :外周壁 8A :突出部 8b :外側壁 8c :側壁 9 :浮動密封 9a :密封環 9b : Ο形環 10 :環體 11 :環狀空間 -15- 201026979 12 :第1環部 12a :側壁 1 2b :外周壁 12c :側壁 12d :內周壁 13 :第2環部 1 3 a :側壁 1 3b :外周壁 鬱 1 3c :內周壁 1 3 d :內側壁 20 :轉輪裝置 21 :托架 22 :軸 23 :軸承 24 :滾子 2 5 :浮動密封 © -16-2 · 'Cage 2A: recess 2a: inner peripheral wall 2B: projection 2b: side wall 2C: stage portion 2c: side wall 2d: side wall 3: screw 4: shaft 5: bearing 6: hub 7: cutter ring 8: spacer 8a: outer peripheral wall 8A: protruding portion 8b: outer side wall 8c: side wall 9: floating seal 9a: sealing ring 9b: ring-shaped ring 10: ring body 11: annular space -15 - 201026979 12: first ring portion 12a: side wall 1 2b : outer peripheral wall 12c : side wall 12d : inner peripheral wall 13 : second ring portion 1 3 a : side wall 1 3b : outer peripheral wall depression 1 3c : inner peripheral wall 1 3 d : inner side wall 20 : revolving device 21 : bracket 22 : Shaft 23: Bearing 24: Roller 2 5: Floating seal © -16-