Ϊ288212 九、發明說明： 【發明所屬之技術領域】 本發明係提供-種同步運轉之滾她持器，其主要用 途係降低雜的磨擦阻力及噪音，以提昇傳動之效率·其 主要係於用以框限滾柱之隔體，設騎二至數 ς 持部及延伸平面之彌塊所構成，藉__之相對侧面 之呈對角設置之-至數保持部_滾柱不脫落，而藉相鄰 隔體之相對細之呈對角設置之—至數延伸平面，不與滚 柱接觸’崎低餘的磨擦阻力及噪音，進而提昇滾柱的 傳動效率。 【先前技術】 請參酬-、二所示，f知之保持 性、呈長條狀之鏈結部1 1、1 2間，設數間=== 塊1 5，各保持塊i 5_與峡 系形成上下對稱之圓柱面保持部丄5 土、 1保持塊15之相對保持部i 5 2、i 5 m =呈=r保持部i52、i5i= 力，待柱16滾動時之飾 【發明内容】 基於上述習知保持器之缺點，本發明人乃潛心研究，不斷 的叹计改良’並製作樣品離，經反覆酬試，再加以改 進，終有確能達成以下發明目的之本發明誕生。 即，本判之主要目的，_減少雜塊触柱接觸 I2S8212 之面積，以降低滾柱的磨擦阻力及噪音，進而提昇滚柱之 傳動效率。 為達上述發明目的，本發明之特徵係在於：兩具撓性 而呈長條形之鏈結部間係連結數間隔排列之隔體，隔體間 係用以容置躲，隔體係由二至數保持塊線性連結所構成 ，隔體兩側與兩鏈結部間係各以一次鏈結部連結，該各保 持塊之兩側面由上而下或由下而上係形成為呈圓柱面之保 持部及等於或大於9 Q度角之延伸平面不和滾柱接觸，各 保持塊之储部餘赴半部或下半勒；同_隔體之數 相鄰保持塊同侧面之保持部及延伸平面係呈上下對置 體之相對侧面之上下對角方向各具—至數保持部及延 Π面。由於延伸平面不和滚柱接觸，故可使滚柱和保持 f的接觸面積減少，而降似袞柱的磨擦阻力及噪音，同時 由於延伸平面與鏈結部間之夾料於或大於9 ◦度角，故 可以使保持塊的脫模變得更加很容易。 【實施方式】 為使貝審查委員及習於本項技藝之人士，對本發明有 更步之瞭解，兹舉一較佳實施例，詳細說明如後：（惟， 本實施例僅域於_，本發明日後之實施，並不以此為 限，凡以本發明之技術特徵所為之改良實施，皆受本發明 所拘束）。 请參閱圖三至圖五八、B、（^示，其係本發明之第 一種實施例，其係於兩具撓性而呈長條狀之鏈結部21、 22間設數間隔等距排列的隔體2 5，各隔體25與兩鏈 …Ρ21、2 2間係另各以—細短的次鏈結部2 32 4 連…’使保持H2 〇之撓折度更佳，各隔體2 5間係形成 1288212 一容置空間26而可供容置滾柱27，該各隔體25係由 三保持塊2 51、252、253呈線性連結而成，該兩 保持塊2 51、2 5 3之兩侧面上半端係形成為圓柱面之 保持部 2511、2512、2531、2532,各保 持部2 511、2512、2531、253 2往下則形 成一延伸平面2 513、2514、2533、2534 ，該各延伸平面2 513、2514、2533、253 4與鏈結部21(22)之夾肖係等於90度，該保持塊 2 5 2兩側面之下半端係形成為圓柱面的保持部2 5 2丄 、2522，各保持部252工、2522往上則形成一 延伸平面2523、2524,該延伸平面2 5 2 3、2 524與鏈結部21(22)之夾角係等於9〇度，各保 持塊2 51、2 5 2、2 5 3兩側面之中間位置係位於同 一軸線上，相對的保持塊251、253側面之保持部2 512、2511、2532、2531係皆位上半端， 中間的相對保持塊2 5 2之保持部2 5 2 2、2 5 2工係 =於下半端，其中，該各保持部之特半徑係大於滾柱 2 7之半徑’而藉各上下對置的各保持部2 5 i 2、2 5 11'2 522^2 5 2 1 . 2 5 3 2.2 5 3 1#^ 制滾柱2 7脫落，而藉中間位置以上 η ς , ο 〇ΓΊΑ 〇 次从下之各延伸平面 2513、2514、2523、2524、2533、 1288212 2 5 3 4不與滾柱2 7轴面接觸’乃可大幅降低各滚柱2 ' 7滾動時之磨擦阻力及噪音，進而提昇滾柱2 7之傳動效 率。 t 請參閱圖六至圖九A、B、C所示，其係本發明之第 , 二種實施例，其係於兩具撓性而呈長條狀之鏈結部3工、 32間設數間隔等距排列的隔體3 5，各隔體35與兩鏈 結部31、3 2間係另各以一細短的次鍵結部3 3、3 4 • 連結，使保持器3 〇之撓折度更佳，各隔體3 5間係形成 -容置空間3 6而可供容置滾柱2 7，該各隔體3 5係由 三保持塊3 51、3 5 2、3 5 3呈線性連結而成，該保 持塊3 51之兩侧面係形成一上下對置之圓柱面保持部3 511、3 512，保持部3 511係位於上半端，其朝 下係形成一延伸平面3 513，該延伸平面3 5丄3與鏈 結部3 1 (3 2)之炎角係等於90度，保持部3512 鲁係位於下半端’其朝上係形成一延伸平面3 $ 14，該延 伸平面3514與鏈結部31(32)之夾角係等於9〇 度’該保持塊3 5 3兩侧面上半端及下半端係亦各具一圓 •柱面保持部3 5 31、3 5 3 2，兩保持塊3 5 χ、3 5 * 3同側面之保持部3 511、3 5 3 1係皆位於上半端， 背側面之保持部3 512、3 5 3 2係皆位於下半端，該 中間保持塊3 5 2之兩侧面亦各开》成-上下對置之圓柱面 1288212 ，持部3 5 2 1、3 5 2 2，保持部3 5 2 1係位於上半 端’其朝下係形成-延伸平面3 5 2 3，該延伸平面3 5 23與鏈結部3 1 (32)之夾角係等於9 0度，保持部 j521與保持部3512、3532呈上下對置，保持 #3 5 2 2係位於下半端，其朝上係形成一延伸平面3 5 24，該延伸平面與鏈結部3 1 (32)之夾角係等於9 0度’保持部3 5 2 2與保持部3 511、3 5 3 1呈上 下對置’中間保持塊3 5 2之寬度係大於其兩側之保持塊 3 5 3 5 3 ,保持塊3 51、3 5 3之寬度係等寬，其中 ，該各保持部之曲率半徑係大於滾柱之半徑，而藉各上下 對置的各保持部3511、3512、3521、352 2、3 5 3 1、3 5 3 2乃可限制滾柱2 7脫落，及藉中 間位置以上或以下之各延伸平面3 5 i 3、3 5 i 4、3 523、3524、3533、3 5 3 4不與滾柱27軸 面接觸，乃可大幅降低各雜2 7滾動時之磨擦阻力及噪 音，進而提昇滾柱2 7之傳動效率；請參閱圖十六所示， 其係本發明錢伸平面之另-實施例，本發明各實施例之 延伸平面與鏈結部間之夾角，亦可設為大於9 〇度，如圖 所示，為9 0度角，02為大於9 〇度。 請參閱圖九至圖十-A、B、C所示，其係本發明之 第二種實施例，其係於兩具撓性而呈長條狀之鏈結部41 1288212 、42間設數間隔等距排列的隔體4 5，各隔體45與兩 鏈結部4 1、42間係另各以一細短的次鍵結部43、4 、連、。使保持H 4 Q之撓折度更佳，各隨4 5間係形 成-容置蝴4 6而可供容置滾柱2 7，該各隔體4 5係 由二保持塊4 51、4 5 2呈線性連結而成，保持塊4 5 1之兩側面上半端係各形成一圓柱面的保持部45工工、 4 512 ’各保持部4 511、4 512朝下係形成延伸 平面4 513、4 5 1 4 ’該延伸平面4 513、4 51 4與鏈結部41(42)之夾角係等於9〇度，保持塊4 5 2之兩侧面下半端係各形成一圓柱自的保持部4 5 2丄 、4522,各保持部4521、4522朝上係形成一 延伸平面4523、4524’該延伸平面4 5 2 3、4 524與鍵結部41(42)之夾角係等於9〇度，該兩 保持塊4 51、4 5 2的寬度係等寬’其中，該各保持部 之曲率半徑係大於滾柱之半徑，而藉各上下對置的各保持 部4 512、4 511、4 5 2 2、4 5 2 1乃可限制滾 柱2 7脫落’及藉中間位置以上或以下之各延伸平面4已 13、4514、45 23、452 4不與滾柱2 7轴面 接觸’乃可大幅降低各滾柱2 7滾動時之磨擦阻力及聲音 ，進而提昇滚柱2 7之傳動效率。 請參閱圖十二至圖十五所示，其係本發明一種實施例 1288212 之保持器20應用於線性滑軌之示意圖 組裝上滾柱27後，係可挽曲穿置於滑塊51與滑執5〇2 兩側間呈斜對角相對的四組_翻，不_循環滚動。 &綜上所述，本發明實深具實用性及進步性，且經本申 明人遍查_外文獻，並無發現相同錢似者，本發明誠 符合專利法上«發明之規定，爰依法提出申請/ 【圖式簡單說明】 圖一係習知保持器之立體外觀圖。 圖一係習知保持器之剖面示意圖。 圖二係本發明第一種實施例之立體外觀圖。 圖四Α係圖三之ΑΑ剖面示意圖。 圖四B係圖三之BB剖面示意圖。 圖四C係圖三之CC剖面示意圖。 圖五A係四A之DD剖面示意圖。 圖五B係四A之EE剖面示意圖。 圖五C係四A之FF剖面示意圖。 圖六係本發明第二種實施例之立體外觀圖。 圖七A係圖六之AA剖面示意圖。 圖七B係圖六之BB剖面示意圖。 圖七C係圖六之C C剖面示意圖。 圖八A係圖七A之DD剖面示意圖。 圖八B係圖七A之EE剖面示意圖。 圖八C係圖七A之FF剖面示意圖。 圖九係本發明第三種實施例之立體外觀圖。 圖十A係圖九之AA剖面示意圖。 圖十B係圖九之B B剖面示意圖。 圖十一A係圖十A之CC剖面示意圖。 11 -1288212 圖十一B係圖十A之DD剖面示意圖。 圖十一C係圖十A之E E剖面示意圖。 圖十二係第一種實施例組設滚柱時之撓折示意圖。 圖十三係線性滑執之立體外觀圖。 圖十四係圖十三之AA剖面示意圖。 圖十五係本發明應用於線性滑執之廻流示意圖。 圖十六係本發明之延伸平面與鏈結部之夾角示意圖。 【主要元件符號說明】 。 丄鏈結部 d鏈結部 5保持塊 2鏈結部 5隔體 5 3保持塊 511保持部 514延伸平面 5 2 3延伸平面 5 3 2保持部 2鏈結部 5隔體 5 3保持塊 512保持部 5 21保持部 5 2 4延伸平面 5 3 3延伸平面 丄U保持器 1 3次鏈結部 151保持部 2 0保持器 2 3次鏈結部 2 51保持塊 2 6容置空間 2 512保持部 2 5 21保持部 14次鏈結部 ] 15 2保持部 21鏈結部 2 2 4次鏈結部 2 252保持塊 2 2 7滾柱 2 2 513延伸平面2 2 5 2 2保持部2 2524延伸平面2531保持部2 2 5 3 3延伸平面2 5 3 4延伸平面 30保持器 31鏈結部 3 2 3次鏈結部 2 4次鏈結部 2 351保持塊352保持塊 36容置空間3511保持部€ 面3 514延伸平面3 M2 2保持部3 5 2 3 3 5 3 3 5 3 2^Γ 3 5 3 4延伸平面 4 1鏈結部 4 3次鏈結冑4 4次鍵結部 12 1288212 451保持塊 452保持塊 24容置空間 2 7滾柱 4 511保持部 4 512保持部 4 513延伸平面4 514延伸平面4 5 2 1保持部 4 5 2 2保持部 4 5 2 3延伸平面4 5 2 4延伸平面 Θ1延伸平面與鏈結部間之夾角 Θ2延伸平面與鏈結部間之夾角 13Ϊ 288212 IX. Description of the Invention: [Technical Field] The present invention provides a synchronously-operated roll-holding device, the main purpose of which is to reduce the frictional resistance and noise of the hybrid to improve the efficiency of the transmission. The frame is limited to the spacer of the roller, and is composed of two blocks of the holding portion and the extending plane, and the opposite side of the __ is disposed diagonally to the number of holding portions _ the roller does not fall off, and By the relatively thinness of the adjacent partitions, the diagonally arranged planes - to the number of extension planes, do not contact the rollers with the frictional friction and noise, thereby improving the transmission efficiency of the rollers. [Prior Art] Please enter the rewards - and the second ones, f know the retention, the long chain links 1 1 and 1 2, set the number === block 1 5, each holding block i 5_ and The gorge forms a cylindrical surface holding portion 上下5 of the upper and lower symmetry, and the relative holding portion i of the holding block 15 i 2 2, i 5 m = is a holding portion i52, i5i = force, when the column 16 is rolled, the invention Contents Based on the shortcomings of the above-mentioned conventional holders, the present inventors have devoted themselves to research, constantly sighing and improving 'and making sample separations, and after repeated rewards, and then improving them, the invention can finally achieve the following inventions. . That is, the main purpose of this judgment is to reduce the area of the I2S8212 contact with the contact block to reduce the frictional resistance and noise of the roller, thereby improving the transmission efficiency of the roller. In order to achieve the above object, the present invention is characterized in that: two flexible and elongated strips are connected by a plurality of spacers arranged at intervals, and the partitions are used for accommodating and hiding. The plurality of retaining blocks are linearly connected to each other, and the two sides of the spacer are connected by a single link portion, and the two sides of the retaining block are formed into a cylindrical surface from top to bottom or from bottom to top. The holding portion and the extending plane equal to or greater than 9 Q degrees are not in contact with the roller, and the storage portion of each holding block is left to the half or the lower half; the same portion of the adjacent holding block of the same spacer And the extending plane is opposite to the opposite side of the upper and lower opposing bodies, each having a plurality of holding portions and a delaying surface. Since the extension plane is not in contact with the roller, the contact area between the roller and the holding f can be reduced, and the friction resistance and noise of the column can be reduced, and the clamping between the extending plane and the chain portion is greater than 9 ◦. The angle of the angle makes it easier to release the retaining block. [Embodiment] In order to make the present invention more familiar with the members of the present invention and those skilled in the art, a preferred embodiment will be described in detail as follows: (However, this embodiment is only in the _, The implementation of the present invention in the future is not limited thereto, and any improvement made by the technical features of the present invention is bound by the present invention. Please refer to FIG. 3 to FIG. VIII, B, (II), which is a first embodiment of the present invention, which is set between two flexible and elongated strips 21, 22, and the like. Between the arranged partitions 25, each of the partitions 25 and the two chains ... Ρ 21, 2 2 are further connected by a thin and short sub-linking portion 2 32 4 ... to make the deflection of the H 2 更 better. Each of the partitions 25 forms a 1288212 accommodating space 26 for accommodating the rollers 27, and the partitions 25 are linearly connected by three holding blocks 2 51, 252, 253, and the two holding blocks 2 The end faces of the two sides of the 51, 2 5 3 are formed as cylindrical retaining portions 2511, 2512, 2531, 2532, and each of the holding portions 2 511, 2512, 2531, 253 2 forms an extending plane 2 513, 2514, 2533, 2534, the extension planes 2 513, 2514, 2533, 253 4 and the chain portion 21 (22) are equal to 90 degrees, and the lower half of the two sides of the holding block 2 5 2 are formed into a cylindrical surface. The holding portion 2 5 2丄, 2522, each holding portion 252, 2522 upwards form an extending plane 2523, 2524, and the angle between the extending plane 2 5 2 3, 2 524 and the chain portion 21 (22) is equal to 9 〇度,保保The intermediate positions of the two sides of the block 2 51, 2 5 2, 2 5 3 are located on the same axis, and the holding portions 2 512, 2511, 2532, 2531 of the opposite holding blocks 251, 253 are all in the upper half, and the middle is opposite. Holding block 2 5 2 holding portion 2 5 2 2, 2 5 2 working system = in the lower half end, wherein the specific radius of each holding portion is larger than the radius of the roller 27 and the respective holdings of the upper and lower sides are maintained Part 2 5 i 2, 2 5 11'2 522^2 5 2 1 . 2 5 3 2.2 5 3 1#^ The roller 2 7 is detached, and by the middle position above η ς , ο 〇 从 从Each of the extending planes 2513, 2514, 2523, 2524, 2533, 1288212 2 5 3 4 does not contact the roller shaft surface of the roller 27, which can greatly reduce the frictional resistance and noise of each roller 2' 7 when rolling, thereby lifting the roller 2 7 transmission efficiency. t See Figure 6 to Figure 9A, B, C, which is the second and second embodiment of the present invention, which is attached to two flexible and elongated links. 3 working, 32 partitions are arranged at equal intervals, and each of the partitions 35 and the two links 31, 3 2 are connected by a short and short sub-bonding portion 3 3, 3 4 • To make the retainer 3 shackle More preferably, each of the partitions 3 is formed with a receiving space 36 for accommodating the rollers 2, and the partitions 3 5 are formed by three holding blocks 3 51, 3 5 2, 3 5 3 The two sides of the holding block 315 are formed by a pair of upper and lower opposite cylindrical surface holding portions 3 511 and 3 512. The holding portion 3 511 is located at the upper end, and an extending plane 3 513 is formed downward. The extension plane 3 5丄3 and the chain portion 3 1 (3 2) are equal to 90 degrees, and the holding portion 3512 is located at the lower end end. The upward direction forms an extension plane 3 $ 14. The extension plane 3514 The angle with the chain portion 31 (32) is equal to 9 degrees. The half-end and the lower half of the two sides of the holding block 3 5 3 also have a circle. The cylindrical holding portion 3 5 31, 3 5 3 2, two holdings The retaining portions 3 511 and 3 5 3 1 of the block 3 5 χ, 3 5 * 3 are located at the upper end, and the retaining portions 3 512 and 3 5 3 2 of the back side are all located at the lower end, the intermediate holding block 3 The two sides of the 5 2 are also respectively opened to the upper and lower opposite cylindrical surface 1288212, the holding portion 3 5 2 1 , 3 5 2 2, and the holding portion 3 5 2 1 is located at the upper end 'the downward facing formation-extension plane 3 5 2 3, the extension flat The angle between the 3 5 23 and the chain portion 3 1 (32) is equal to 90 degrees, and the holding portion j521 and the holding portions 3512 and 3532 are vertically opposed to each other, and the holding #3 5 2 2 is located at the lower end, and the upward portion is formed. An extending plane 3 5 24, the angle between the extending plane and the chain portion 3 1 (32) is equal to 90 degrees 'the holding portion 3 5 2 2 and the holding portion 3 511, 3 5 3 1 are vertically opposed to each other' The width of the block 3 5 2 is greater than the retaining blocks 3 5 3 5 3 on both sides thereof, and the widths of the retaining blocks 3 51 and 3 5 3 are equal width, wherein the radius of curvature of each retaining portion is greater than the radius of the roller. By means of the respective holding portions 3511, 3512, 3521, 352 2, 3 5 3 1 , 3 5 3 2 which are opposed to each other, the roller 27 can be restricted from falling off, and the extending planes 3 5 above or below the intermediate position can be restricted. i 3, 3 5 i 4, 3 523, 3524, 3533, 3 5 3 4 are not in axial contact with the roller 27, which can greatly reduce the frictional resistance and noise during the rolling of the various 27, and thus improve the roller 2 7 Transmission efficiency; please refer to FIG. 16 , which is another embodiment of the present invention, and the angle between the extension plane and the link portion of each embodiment of the present invention may also be set to be greater than 9 〇. Degree, as shown in the figure, is 90 degrees and 02 is greater than 9 degrees. Referring to FIG. 9 to FIG. 10 - A, B, and C, which is a second embodiment of the present invention, it is provided in two flexible and elongated links 41 1288212 and 42 The spacers 45 are arranged at equal intervals, and each of the spacers 45 and the two links 4 1 and 42 are respectively connected by a short and short secondary bonding portion 43 , 4 , and . In order to maintain the flexibility of the H 4 Q, each of the four columns is formed to accommodate the sliders 4 6 for accommodating the rollers 2 7 , and the spacers 4 5 are composed of two holding blocks 4 51 , 4 . 5 2 is formed by linear connection, and the retaining portions 45 each forming a cylindrical surface on both sides of the retaining block 451 are formed, and 4 512 'the retaining portions 4 511, 4 512 are formed downward to form an extending plane 4 513 4 5 1 4 ' The angle between the extension planes 4 513, 4 51 4 and the chain portion 41 (42) is equal to 9 degrees, and the lower half ends of the two sides of the holding block 425 form a cylindrical self-holding portion. 4 5 2丄, 4522, each of the holding portions 4521, 4522 is formed with an extending plane 4523, 4524', and the angle between the extending planes 4 5 2 3, 4 524 and the bonding portion 41 (42) is equal to 9 degrees. The widths of the two holding blocks 4 51 and 4 5 2 are equal widths, wherein the radius of curvature of each of the holding portions is greater than the radius of the roller, and each of the holding portions 4 512 , 4 511 , 4 5 that are vertically opposed 2 2, 4 5 2 1 can limit the roller 2 7 off' and the extension planes 4 above or below the intermediate position have been 13, 4514, 45 23, 452 4 not in contact with the roller 2 7 axis. Dramatically reduce each roller 2 7 The frictional resistance and sound during the movement improve the transmission efficiency of the roller 27. Referring to FIG. 12 to FIG. 15 , the holder 20 of an embodiment 1288212 of the present invention is applied to a schematic diagram of a linear slide rail, and is assembled to the slider 51 and slideable. Hold 5〇2 The four groups are diagonally opposite to each other, and they do not circulate. In summary, the present invention has practical and progressive nature, and the present invention has not found the same money as the person who has examined the _ foreign literature, and the invention conforms to the provisions of the invention on the patent law. Application / [Simple Description of the Drawings] Figure 1 is a three-dimensional appearance of a conventional holder. Figure 1 is a schematic cross-sectional view of a conventional holder. Figure 2 is a perspective view of the first embodiment of the present invention. Figure 4 is a schematic cross-sectional view of Figure 3. Figure 4B is a schematic view of the BB section of Figure 3. Figure 4C is a schematic cross-sectional view of CC of Figure 3. Figure 5A is a schematic view of the DD section of the four A. Figure 5B is a schematic diagram of the EE section of the four A. Figure 5C is a schematic view of the FF section of the four A. Figure 6 is a perspective view of a second embodiment of the present invention. Figure 7A is a schematic cross-sectional view of the AA of Figure 6. Figure 7B is a schematic view of the BB section of Figure 6. Figure 7C is a schematic view of the C C section of Figure 6. Figure 8A is a schematic cross-sectional view of the DD of Figure 7A. Figure 8B is a schematic view of the EE section of Figure 7A. Figure 8C is a schematic view of the FF section of Figure 7A. Figure 9 is a perspective view of a third embodiment of the present invention. Figure 10A is a schematic cross-sectional view of the AA of Figure 9. Figure 10B is a schematic view of the B B section of Figure 9. Figure 11A is a schematic cross-sectional view of the CC of Figure 10A. 11 -1288212 Figure 11B is a schematic view of the DD section of Figure 10A. Figure 11C is a schematic cross-sectional view of E E of Figure 10A. Figure 12 is a schematic view showing the deflection of the first embodiment when the rollers are assembled. Figure 13 is a three-dimensional appearance of a linear slipper. Figure 14 is a schematic cross-sectional view of the AA of Figure 13. Figure 15 is a schematic diagram of the turbulence of the present invention applied to linear sliding. Figure 16 is a schematic view showing the angle between the extending plane and the chain portion of the present invention. [Main component symbol description].丄 chain portion d-link portion 5 holding block 2 chain portion 5 spacer 5 3 holding block 511 holding portion 514 extending plane 5 2 3 extending plane 5 3 2 holding portion 2 chain portion 5 spacer 5 3 holding block 512 Holding portion 5 21 holding portion 5 2 4 extending plane 5 3 3 extending plane 丄U holder 1 3rd chain connecting portion 151 holding portion 2 0 holder 2 3rd link portion 2 51 holding block 2 6 accommodating space 2 512 Holding portion 2 5 21 holding portion 14-time link portion 15 2 holding portion 21 chain portion 2 2 4th-chain portion 2 252 holding block 2 2 7 roller 2 2 513 extending plane 2 2 5 2 2 holding portion 2 2524 extension plane 2531 holding portion 2 2 5 3 3 extension plane 2 5 3 4 extension plane 30 holder 31 chain portion 3 2 3 times chain portion 2 4 times chain portion 2 351 holding block 352 holding block 36 housing space 3511 retaining portion € face 3 514 extension plane 3 M2 2 holding portion 3 5 2 3 3 5 3 3 5 3 2^Γ 3 5 3 4 extension plane 4 1 chain portion 4 3 times link 胄 4 4 times bonding portion 12 1288212 451 retaining block 452 retaining block 24 accommodating space 2 7 roller 4 511 retaining portion 4 512 retaining portion 4 513 extending plane 4 514 extending plane 4 5 2 1 retaining portion 4 5 2 2 retaining portion 4 5 2 3 extending plane 4 5 2 4 extension plane Θ 1 extension The angle Θ2 between the link and the flat portion extending in an angle between the plane of the link portion 13