201102013 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種在施加過大之橫拉力時鏈齒會斷裂之 拉鏈之鏈帶。 【先前技術】 在關閉拉鏈而嚙合鏈齒排彼此之狀態下，若於將左右 對鏈帶彼此拉開之方向施加拉力，則當超出特定之拖拉力 時鏈布或鏈齒會斷裂。此時，若鏈布發生斷裂，修復該斷 裂之鏈布將成為困難之作業。 與此相對，當施加過大之橫拉力時於鏈齒發生斷裂之情 形下’猎由將斷裂之鏈齒替換成新鏈齒，比較容易修復拉 鏈。尤其’使用大型鏈齒之拉鏈’可藉由取代斷裂之鍵嵩 而安裝修補用之鏈齒來修復拉鏈。 先前，日本實開昭53-71661號公報（專利文獻㈣示有一 種手動型㈣成形機，其係詩藉由射出成形將新鍵齒安 裝固定於鏈齒排中一部分鏈齒欠缺的鏈帶上。 專利文獻1所記載之手動型射出成形機，係利用欠缺之 鏈齒之相義齒來定位成形用模具，而可決定藉由新射出 成形而安裝固定之鏈齒的安裝位置或安裝間距。 再者’先前，日本特公昭6G_35127號公報（專利文㈣揭 不有-種拉鏈，其係以藉由射出成形而將鍵齒安裝固定於 鍵布時大幅增大鏈布與鏈齒之安裝強度為目的，而於將鏈 齒安裝固定於鏈布之腳部，具備具有最大厚度之_以下 之厚度的急速冷卻部分。201102013 VI. Description of the Invention: [Technical Field] The present invention relates to a fastener tape of a zipper in which a sprocket breaks when an excessive lateral pulling force is applied. [Prior Art] When the zipper is closed and the element rows are engaged with each other, if a pulling force is applied in a direction in which the right and left links are pulled apart from each other, the chain cloth or the sprocket may be broken when the specific pulling force is exceeded. At this time, if the chain cloth breaks, repairing the broken chain cloth becomes a difficult task. On the other hand, when an excessively large lateral pulling force is applied, the sprocket is broken, and the sprocket is replaced by a new sprocket, which makes it easier to repair the zipper. In particular, the use of a large sprocket zipper can repair the zipper by replacing the broken key 嵩 and installing the repairing sprocket. Japanese Laid-Open Patent Publication No. SHO-53-71661 (Patent Document (4) shows a manual type (four) molding machine which is configured to mount and fix new key teeth on a part of a chain of fastener elements which are lacking in a chain element by injection molding. In the manual injection molding machine described in Patent Document 1, the molding die is positioned by the missing teeth of the missing fastener elements, and the mounting position or the mounting pitch of the fastener elements fixed by the new injection molding can be determined. [Previously, Japanese Patent Publication No. 6G_35127 (Patent No. 4) discloses a type of zipper which greatly increases the mounting strength of the chain cloth and the fastener element when the key teeth are attached and fixed to the key cloth by injection molding. For the purpose, the fastener element is mounted and fixed to the leg portion of the chain cloth, and has a rapid cooling portion having a thickness of _ or less of the maximum thickness.
146170.doc 201102013 專利文獻2所記載之拉鏈，於腳部形成凹部等以促進射 出成形後之冷卻，而減少冷卻時鏈齒之内部所發生之空 洞，藉此可大幅增大鏈布與鏈齒之安裝強度。 先前技術文獻 專利文獻 專利文獻1:日本實開昭53-71661號公報 專利文獻2:曰本特公昭60-35 127號公報 【發明内容】 發明所欲解決之問題 近年來，已知有在魚養殖用之定置網的接合部使用拉鏈 者。例如，形成用於鮪魚之養殖之定置網時，藉由使用拉 鏈接合而形成複數個網片，容易進行網之製造或組合，且 易於修補因使用而損壞之網。 然而’隨著辩魚之成長，持續使用定置網2年、3年後， :僅網本身會發生損壞，甚至用於接合之拉鏈亦有發生損 壞之情形。另’如此之定置網之接合所使用之拉鏈係使用 耐強橫拉力（例如250 kg/25爪⑷者。 當對該拉鏈施加過大之橫拉力而導致安裝时於鍵帶之 =破裂時’藉由利用專利文獻1所記載之手動㈣出成 形機i可料鏈衫裝^域布轉代破狀鏈齒。然 而’女裝固定新鏈齒時’有必要將網送往專利文⑴所揭 ㈣具或射以形機之修理場所進行修缮作業，因 此’難以在野外或船上等容易地安裝固㈣齒。 者如專利文獻！之圖2所記载，當樹脂製之键齿由鍵 I46170.doc 201102013 :完全：離之情形時，其後可直接進行於欠缺鏈齒之部分 女裝口疋新鏈齒之作業’但在鏈齒於嚙合頸部斷裂之情形146170.doc 201102013 The zipper described in Patent Document 2 forms a concave portion or the like on the leg portion to promote cooling after injection molding, and reduces voids occurring inside the fastener element during cooling, thereby greatly increasing the chain cloth and the fastener element. Installation strength. CITATION LIST Patent Literature Patent Literature 1: Japanese Laid-Open Patent Publication No. SHO-53-71661 (Patent Document 2) Japanese Patent Publication No. Sho 60-35 No. 127. SUMMARY OF THE INVENTION PROBLEM TO BE SOLVED BY THE INVENTION In recent years, it has been known that fish The joint of the fixed net for breeding uses a zipper. For example, when forming a fixed net for the culture of squid, a plurality of nets are formed by using a pull joint, which facilitates the manufacture or combination of the net, and is easy to repair the net damaged by use. However, with the growth of the defensive fish, after the continuous use of the fixed network for 2 years and 3 years, only the net itself will be damaged, and even the zipper used for joining will be damaged. In addition, the zipper used for the joint of such a fixed net is to use a strong tensile force (for example, 250 kg / 25 claws (4). When excessive tying force is applied to the zipper, causing the belt to be broken when installed] The manual (four) forming machine described in Patent Document 1 can be used to convert the chain fabric into a broken chain tooth. However, when the women wear a new fastener, it is necessary to send the net to the patent (1). Or it can be repaired at a repairing location of a machine, so it is difficult to easily mount a solid (four) tooth in the field or on a ship. As shown in Fig. 2 of the patent document, when the resin is made of a key I46170.doc 201102013: Complete: When it is away from the situation, it can be directly carried out in the operation of the new sprocket of the women's mouth of the missing sprocket's but the sprocket is broken at the meshing neck.
下，於進行安裝固定新鏈齒之作業之前，必須先將鍵齒之 腳部從鍵布拆除D 圖係》兒明對處於唾合狀態之先前之拉鍵㈣施加較強 橫拉力時’拉鏈91()之鏈齒914及鏈布發生損壞之狀態的 圖。以下說明先前之拉鏈910可能發生之損壞狀態。 拉鏈910具有左右一對鏈帶916、917。該鏈帶MG、 係於各自之鏈布之相對侧緣安裝固定複數個鏈齒912、 913 914而形成。另，圖14所示之例中，嗜略記載用以進 行左右一對鏈帶916、917彼此之嚙合及分離的滑件。 若對處於嚙合狀態之拉鏈91〇於圖14所示之左右方向施 加拉力，且使該力不斷增大，則當超出拉鏈91 〇所能耐 文之最大之橫拉力時，將於拉鏈91〇發生損壞。 作為拉鏈910發生之損壞，首先可舉出的有處於嚙合狀 態之鏈齒912、913、914所發生之斷裂。若不斷增大施加 於處於嚙合狀態之鏈齒912、913、914之橫拉力，則一般 會於剖面積最小之較細的嚙合頸部78發生斷裂921。圖14 所示之例係顯示剖面積小於鏈齒9丨4之喷合頭部7〇之唾合 頸部78發生斷裂921的狀態。 與此相對，在拉鏈91〇之鏈齒912、913、914之斷裂強度 較強之情形下’鏈帶916、917之鏈布將發生斷裂920。 然而’在鏈齒914之嚙合頸部78發生斷裂921之情形下， 由於處於嚙合狀態之嚙合頭部7〇會脫落’而導致拉鏈91〇 146170.doc 201102013 瞬間達到分離狀態之可能性古 — α 此性增135。右拉鏈910成為分離狀 態，則網彼此之接合將解&，# & & & i + a 竹解除，攸而產生養殖魚從定置網中 逃脫等之重大損失。且，斷裂之鏈齒之腳部㈣維持橫跨 鏈布之端緣而安裝固定的狀態。因此，為取代斷裂之鏈齒 而安裝固定新鏈齒’必須先進行將斷裂之鏈齒拆除之作 業。 該從鏈布拆除鏈齒之作業-般不易進行，尤其係如定置 網之接合所用之拉鏈之鏈#，要#除安裝間距為Μ mm〜30 mm左右之大型鏈齒之作業尤為困難。 又，若增加鏈齒912、913、914之強度，以使鏈齒912、 913 914不發生斷裂，則如圖14所示，會使鏈布發生斷裂 920。若鏈布發生斷裂92〇，則有必要更換鏈帶μ?，而該 等修復更為困難。 因此，較好的是，使用在有必要修復之用途之拉鏈不僅 且為t、拉力之可耐性強，且宜為鏈布不會發生斷裂而在鏈 齒之嚙合頸部以外之部分發生斷裂或變形的結構。另，於 專利文獻2所記載之拉鏈之腳部形成有凹部，形成該凹部 之目的在於藉由促進射出成形後之冷卻來增大鏈布與鏈齒 之安裝強度。因此，若對專利文獻2所記載之於拉鏈施加 橫拉力、且逐漸增大該橫拉力之情形時，亦會導致剖面積 小的响合頸部發生斷裂而使拉鏈成為分離狀態。 本發明係鑒於上述先前之問題而完成者，其目的在於提 供一種即使在施加超出斷裂強度之橫拉力而使鏈齒之一部 分斷裂的情形下，斷裂之鏈齒之嚙合頭部及嚙合頸部亦可 146170.doc 201102013 維持與相對側之鏈齒嚙合之狀態，且具備鏈布不會殘留斷 裂之鏈齒碎片之鏈齒的鏈帶。 解決問題之技術手段 為達成上述目的’本發明之鍵帶係於左右—對鍵布之才目 對側緣分別安裝固定有複數個鏈齒，其特徵為：上述鍵齒 在將垂直於上述鏈布面之方向之一面作為第1面且將另一 面作為第2面之情形時，包含：橫跨上述鏈布之端緣而安 裝固定於第1面侧之第1腳部；安裝固定於第2面側之第2腳 部；從上述第1及第2腳部向相對側之鏈齒延伸之喃合頸 部；及從該嚙合頸部進一步向相同方向延伸且於鏈布長度 方向凸出之嚙合頭部；且，當令上述嚙合頸部之最小剖面 積為Sn，令上述第1及第2腳部之至少一方之鏈布寬度方向 之至少一部分的剖面、且平行於鏈布長度方向之剖面的剖 面積為Sf的情形下，滿足Sn>Sf之關係。 且，較好的是，於上述左右一對鏈布之相對端緣延設比 鏈布厚實地形成之芯部；上述鏈齒之第丨及第2腳部係橫跨 上述芯部而安裝固定於上述鏈布之相對端緣；上述剖面積Next, before performing the work of installing and fixing the new sprocket, the foot of the key must be removed from the key cloth. The picture shows the zipper 91 when the strong pull force is applied to the previous pull button (four) in the salivating state. () A diagram showing the state in which the fastener element 914 and the chain cloth are damaged. The damage state that may have occurred with the previous zipper 910 is explained below. The zipper 910 has a pair of left and right chain belts 916, 917. The chain belt MG is formed by attaching and fixing a plurality of fastener elements 912 and 913 914 to opposite side edges of the respective chain cloths. Further, in the example shown in Fig. 14, a slider for engaging and disengaging the pair of left and right chain belts 916, 917 is described. If the zipper 91 in the engaged state is applied with a pulling force in the left-right direction shown in FIG. 14 and the force is continuously increased, the zipper 91 将于 will occur when the zipper 91 超出 is capable of exceeding the maximum transverse pulling force of the zipper 91 〇. damage. As a result of the damage of the zipper 910, first, the sprocket 912, 913, and 914 in the meshed state are broken. If the transverse pulling force applied to the sprocket 912, 913, 914 in the engaged state is continuously increased, the rupture 921 is generally caused by the thin meshing neck portion 78 having the smallest sectional area. The example shown in Fig. 14 shows a state in which the neck portion 78 having a sectional area smaller than the sprocket 9 丨 4 is broken and the neck portion 78 is broken 921. On the other hand, in the case where the breaking strength of the fastener elements 912, 913, and 914 of the zipper 91 is strong, the chain of the fastener tapes 916 and 917 is broken 920. However, in the case where the meshing neck 78 of the fastener element 914 is broken 921, the possibility that the zipper 91〇146170.doc 201102013 instantaneously reaches the separation state due to the meshing head 7 in the engaged state may fall off. This increase is 135. When the right zipper 910 is in a separated state, the meshes are joined to each other to release the solution, and the # &&& i + a bamboo is released, thereby causing a major loss of the cultured fish to escape from the fixed net. Further, the leg portion (4) of the broken sprocket is maintained in a state of being fixed and fixed across the edge of the chain cloth. Therefore, the installation of the fixed new sprocket to replace the broken sprocket must first perform the work of removing the broken sprocket. The work of removing the sprocket from the chain cloth is generally difficult to perform, especially for the zipper chain ## used for the joint of the fixed net, and it is particularly difficult to install the large sprocket with a pitch of about 〜 mm~30 mm. Further, if the strength of the fastener elements 912, 913, and 914 is increased so that the fastener elements 912 and 913 914 are not broken, as shown in Fig. 14, the chain cloth is broken 920. If the chain cloth breaks 92〇, it is necessary to replace the chain belt μ?, and such repair is more difficult. Therefore, it is preferred that the zipper used for the purpose of repairing is not only resistant to t and tensile force, but also that the chain cloth does not break and breaks at a portion other than the meshing neck of the fastener element or Deformed structure. Further, in the leg portion of the slide fastener described in Patent Document 2, a recessed portion is formed, and the recessed portion is formed to increase the attachment strength of the link fabric and the fastener element by promoting cooling after injection molding. Therefore, when the transverse pulling force is applied to the slide fastener described in Patent Document 2 and the lateral pulling force is gradually increased, the neck portion having a small cross-sectional area is broken and the slide fastener is separated. The present invention has been made in view of the above problems, and an object thereof is to provide an engaging head and a meshing neck of a broken sprocket even in the case where a lateral force of the breaking strength is applied to break a part of the sprocket. 146170.doc 201102013 maintains the state of meshing with the opposite side of the fastener element, and has a chain of fastener elements in which the chain cloth does not remain broken. The technical means for solving the problem is to achieve the above object. The key belt of the present invention is attached to the left and right sides of the key cloth, and a plurality of fastener elements are respectively fixed and fixed to the side edges, and the key teeth are perpendicular to the chain. When one of the directions of the cloth surface is the first surface and the other surface is the second surface, the first leg portion is attached and fixed to the first surface side across the edge of the chain cloth; a second leg portion on the two-face side; a tempering neck portion extending from the first and second leg portions toward the opposite side of the fastener element; and extending from the meshing neck portion in the same direction and protruding in the longitudinal direction of the chain fabric Engaging the head portion; and, when the minimum cross-sectional area of the engaging neck portion is Sn, a cross section of at least a part of the chain width direction of at least one of the first and second leg portions is parallel to the longitudinal direction of the chain cloth In the case where the cross-sectional area of the cross section is Sf, the relationship of Sn > Sf is satisfied. Further, it is preferable that a core portion formed thicker than the chain cloth is extended on the opposite end edges of the pair of right and left chain cloths; and the second and second leg portions of the fastener element are mounted and fixed across the core portion The opposite edge of the chain cloth; the sectional area
Sf係作為平行於上述延設之芯部且通過該芯部之面的剖面 積。 又，較好之構成係，上述剖面積Sn與上述剖面積“之 間’滿足0.8xSn>Sf之關係。 較好的疋，於上述第丨及第2腳部之至少一方，形成 尺寸薄於。齒合頸部之厚度方向之尺寸、且減小上述剖面積 Sf的薄片部。 146170.doc 201102013 又，較好的是，上述薄片部係以凹形狀形成於上述第 及第2腳部之至少一方。 另，較好的是，將上述凹形狀之薄片部之鏈布長度方向 之尺寸形成為大於嚙合頸部之鏈布長度方向之尺寸。 再者，較好的是，在包含樹脂製鍵齒排之鍵帶的一部分 中於上述樹脂製之鏈齒排上，將金屬製且於表裡方向分 為2半之修補用鏈齒夾住鏈布，再用螺絲螺合而安裝固定 於鏈布。 發明之效果 根據本發明之鏈帶’由於排列設置於鏈帶之相對端緣之 鏈齒之上述喷合頸部的最小剖面積Sn、肖腳部之剖面積％ 之間’滿足Sn>Sf之關係，因此，於對使左右—對鍵帶彼 此：互拉開之方向施加強橫拉力肖，在嚙合頸部發生斷裂 之前，會於剖面積較小之腳部發生斷裂。 當斷裂先於嚙合頸部而發生在鏈齒之腳部時，該鏈齒會 從之前安裝岐著的鏈布上脫離。即使斷裂發生在腳部之 情形下，鏈齒之嚙合頭部及嚙合頸部依然維持與相對側之 鏈齒排嚙合之狀態。即使鏈齒之腳部發生斷裂，亦可保持 嚙合頭部及唾合頸部之形狀，因此可維持左右一對鏈帶彼 此之嚙合狀態'。又，由於鏈齒之腳部發生斷裂而不可能繼 續使用之鏈齒會從鏈布脫離，因此在之後進行安裝固定新 鏈齒之修補時，無需再進行將斷裂之鏈齒拆除之作業。 又，於左右一對鏈布之相對端緣延設比鏈布厚實地形成 之芯部、且橫跨該芯部而安裝固定鏈齒之腳部之情形下， 146170.doc 201102013 當令平行於延設於上述鏈布之芯部且通過該芯部之面的剖 面積為Sf ’令嚙合頸部之最小剖面積為Sn時，滿足Sn>Sf 之關係。藉此’當施加超過斷裂強度之橫拉力時，可使斷 裂早於剖面積Sn之嚙合頸部而發生在通過芯部之剖面積 之腳部。 又’藉由構成為使上述嚙合頸部之剖面積Sn與上述腳部 之剖面積Sf之關係滿足〇.8xSn>Sf，可更確實地使斷裂早 於剖面積Sn之嚙合頸部而發生在通過芯部之剖面積％之腳 部。 又，藉由於上述第1或第2腳部形成薄於嚙合頸部之厚度 方向之尺寸、且減小上述剖面積攸薄片冑，可維持腳部 之強度而確保拉鏈之特定橫拉力，且可使斷裂早於剖面積 Sn之嚙合頸部而發生在通過芯部之剖面積％之腳部。 又，藉由以凹形狀形成上述第丨或第2腳部之薄片部，即 使在第i或第2腳部附著有少量異物之情形下，由於滑動二 :時該異物會進人凹形狀之薄^，因此可順暢地滑動： 。尤其適合使用在例如將拉鏈沉人海中使用之情 易清潔鏈齒排之用途。 乂 方向的尺寸 可使斷裂適 乂又，藉由將上述凹形狀之薄片部之鏈布長度 形成為大於嚙合頸部之鏈布長度方向的尺寸^ 當地發生。 方6八、， 硬茴鲫衮日f，只要將金屬製且於: 刀為2半之修補用鏈齒夾住鏈 、 % ^ ^ λ* ^ — 行用螺絲螺合以| 裂之鏈齒，猎此可容易地進行鏈帶之修補。 146I70.d〇c 201102013 【實施方式】 以下，炫參妝圖式具體說明應用本發明之鏈帶之拉鏈的 具代表性實施形態。 圖1係顯μ應用本發明之鏈帶16、17之⑽ig應用於 魚之養殖用定置網2之接合用的使用例之圖。且，圖2係將 定置網2之網4彼此接合之拉鏈1〇附近的放大平面圖。 圖1所示之實施例中，作為構成周圍為2〇 m左右之定置 網2之網4彼此的接合用，係使用複數之拉鏈1〇。例如圖工 所示之定置網2為鮪魚之養殖用，且連續使用3年以上者。 如圖1及圖2所示，藉由使用拉鏈1〇接合複數個網4而形成 定置網2，可容易地進行網4及定置網2之製造及安裝、分 解，亦可容易地修補因使用而發生損壞之網4。 其次，用圖2說明拉鏈10之構成。如圖2所示，拉鏈⑺包 含左右一對鏈帶16、17及滑件5〇。於構成左右一對鏈帶 16、17之鏈布的相對側緣，以橫跨芯部14之形式而成排分 別安裝固定有複數個鏈齒12、13。圖2所示之實施形態係 顯示橫跨以凸出於鏈布之相對端緣之形式厚實地延設之芯 部14而安裝固定鏈齒12、13者，但本發明並非限定於在= 布之相對端緣形成芯部14的實施形態，亦可適用於安裝於 不具備芯部14之鏈布的鏈齒。橫跨以凸出於鏈布之相對端 緣之形式厚貫地延設之芯部14而安裝固定鏈齒12、13 在圖2所示之狀態下，於排列設置於鏈帶16、17之相對 端緣之鏈齒12、13排之一端（圖2所示之例中為上端部），分 別連接防止滑件50之脫落且限制其移動範圍之上止擋18。 146170.doc -10· 201102013 且，在排列設置於鏈帶17之一端緣之鏈齒〗3排之另—端 (圖所示之例中為下端部），安裝固定有防止滑件Μ脫落且 限制其移動範圍之開尾筒19。上止擋18係於各個鏈帶16、 17上各連接一個，而開尾筒19係僅安裝固定於鏈帶17側。 又，在排列設置於鏈帶16之一端緣之鏈齒12排的另一端 (圖2所示之例中為下端部），係連接有可對開設於開尾筒η 之嵌插部進行嵌插之插銷3G。另’作為鏈齒ΐ2、η、開尾 筒19、及插鎖30之素材，可使用聚縮經等樹脂成形品。 若由圖2所示之狀態使滑件50向圖2所示之方向下降，則 會從朝滑件50下方開口之嗜合口導入處於嗔合狀態 I2、13。另一方面，從滑件5〇上方之左右開口之導入口導 出成為分離狀態之左右鏈齒12、13。若進一步降低滑件 50，則滑件50之嚙合口會抵接於開尾筒19而到達最下方。 在該狀態下，若將鏈帶16拉向圖2所示之上方，則會使插 銷30從開尾筒19脫開，且使左右鏈帶16 ' 17彼此分離。 將處於分離狀態之左右鏈帶16、17彼此再次結合之情形 時，首先將滑件50之嚙合口降低至抵接於開尾筒^之最下 方。其後，將安裝固定於鏈帶16端緣之插銷3〇從圖2所示 之滑件50之左側的導入口插入，再插入開尾筒之嵌插 部。其後，將滑件50(朝圖2所示之上方移動）往上拉。 於是，從開口於滑件50之上部左右之導入口將處於分離 狀態之左右鍵齒12、U導入，再使成為嚙合狀態之鍵齒 12、13從滑件50之嚙合口導出。如此可容易地進行網4彼 此之分離與接合。該分離、接合網4彼此之作業較為簡 146170.doc -11 - 201102013 單，因此亦可於水中進行。 其次，用圖3及圖4說明本發明之鏈帶16、17之構成、與 排列设置於其相對端緣之鏈齒丨2、丨3之構成。圖3係將圖2 所示之處於嚙合狀態之鏈帶16、17之一部分放大顯示的立 體圖。圖4係圖2及圖3所示之鏈齒12、13之放大平面圖。 如圖3所示’於左右一對鏈帶16、丨7之相對端緣分別排 列设置有鏈齒12、13。於構成左右一對鏈帶16、17之鏈布 之相對端緣延設有比鏈布更厚實度凸出之芯部14。且，以 橫跨該芯部14之形式（包住芯部14而夾住正背面之形式）， 將鏈齒12、13安裝固定於鏈布。 如圖4所示’鏈齒12、具備橫跨鏈布之端緣而安裝固 疋於鏈布之正背面（鏈布之第i面及第2面）的腳部及腳 〇P72D(第1腳部及第2聊部）。另，圖3及圖4所示之狀態， 由於係從垂直於鏈帶16、17之鏈布面之2面中之第丨面側觀 察，因此第2面側之腳部72D係隱藏於背面而觀察不到。 從腳部72U及腳部72D向相對側之鏈齒13、12延伸有嚙 合4部7 8。從嚙合頸部7 8進一步向相對側之鏈齒丨3、丨2以 凸出之形式延伸出嚙合頭部7〇。嚙合頸部78係形成於腳部 72U、72D與嚙合頭部70之間之較細部分。該嚙合頸部78 係於嚙合時使相對側之鏈齒13、12之凸出之嚙合頭部川進 入的部分，藉由嚙合頸部78與嚙合頭部7〇交互嚙合，可耐 受使左右一對鏈帶16、17彼此拉開之方向的橫拉力。 又，如圖4所示，從鏈齒12、13之嚙合頸部78之較細部 分至腳部72U、72D，於嚙合頸部78之兩側平行於鏈布而 146170.doc -12- 201102013 延伸出2個表裡嚙合突片71。上述表裡嚙合突片71之鏈布 長度方向的尺寸係大於腳部72U、72D之鏈布長度方向的 尺寸。再者，於嚙合頭部70之頂部（與腳部72U、72D相反 側之端部的厚度方向）中央’開設有平行於鏈布之表裡嚙 合凹部73。該表裡嚙合凹部73係於嚙合時嵌入相對側之鏈 齒13、12之表裡。齒合突片71的部分。於嚙合時，使相對側 之鏈齒13、12之表裡嚙合突片71嵌入該表裡嚙合凹部73， 藉此耐受相對於鏈布面之垂直方向（厚度方向）上所施加之 上推力’防止處於嚙合狀態之鏈齒丨2、丨3彼此於相對於鏈 布面之垂直方向偏離。 圖2及圖3所示之實施形態中’在與腳部72U、72D之鏈 布面相反側的表面的一部分，形成有平面觀察為長方形凹 之凹形狀的薄片部72P。形成該薄片部72P之目的在於減 少與延設於鏈布之側緣之芯部14平行且垂直於鏈布之、通 過該芯部14之剖面中之腳部72U、72D的剖面積。 以下用圖5及圖6說明鏈齒12、13之嚙合頸部78之剖面形 狀、與薄片部72P之剖面形狀。圖5係說明圖4所示之嚙合 頸部78之V_V剖面的形狀、與該嚙合頸部以之剖面積以的 圖。圖6係說明圖4所示之腳部72U、72£)之乂1_、1剖面的形 狀、與該腳部72U、72D之剖面積Sf的圖。 如圖5所示，鏈齒12、13之嚙合頸部78之剖面係具有相 對於鏈齒12、13之厚度方向（相對於鏈布面為直角之方向） 長、相對於这部丨4之長度方向短的大致長方形的剖面。且 從嚙合頸部78之較細的兩側壁，與芯部14之長度方向平行 146170.doc -13· 201102013 延伸出2個表裡嚙合突片71。此處，將圖5所示之嚙合頸部 78之最小剖面積定義為Sn。圖5所示之實施形態中，顯示 平行於鏈布之長度方向且正交於鏈布面之面的剖面積但 本發明並非限定於該切斷面之剖面積，剖面積“之剖面只 要是能獲得嚙合頸部78之最小剖面積的剖面即可。 其後，用圖6說明腳部72U、72D之剖面形狀。圖6係顯 示平行於鏈布之長度方向且正交於鏈布面之面、且通過芯 部14之大致中央部之腳部72U、72D的剖面。另，芯部μ 係顯示其外觀而非剖面。 如圖6所示，腳部72U、72D之剖面形狀，藉由較高地設 定腳部72U、72D之芯部14之長度方向的兩側部，可維持 腳部72U、72D之剛性。且，即使在對處於嚙合狀態之左 右一對鏈帶1 6、17施加橫拉力時，亦可防止腳部72u、 72D打開而使芯部14脫落。 一般而言，在將拉鏈沉入海中之狀態下經過數年後，會 於其上附著海藻或貝類等異物而妨礙滑件之滑動，然而設 置上述鏈齒12、13之拉鏈10’由於形成於鏈齒12、13之腳 部72U、72D之薄片部72P係處於比該腳部72U、72D之表 面更凹下之處’因此當滑動滑件50時，異物會進入凹部， 從而亦有可順暢進行滑動之效果。 在橫跨部14而將腳部72U、72D安裝固定於鏈布之部 分之背側之、鏈齒12、13之開放側之表面的一部分，形成 有凹形狀之薄片部72P。藉由形成該薄片部up，可減少通 過芯部14之面之腳部72U、72D之剖面積。另，如圖2〜圖* 146I70.doc -14· 201102013 及圖6所示，於鏈齒12、13之開放側之表面之—部分形成 凹形狀的薄片部72P，且將鏈齒12、13之外形維持於與先 前之鏈齒相同之尺寸，藉此，作為鏈齒12、13之嚙合、分 離用滑件，可使用標準之滑件。 此處，如圖6所示’將平行於鏈布之長度方向之腳部 72U、72D之剖面積分別設為％之情形下，形成為使其與 上述鳴合頸部78之剖面積Sn之關係滿足Sn>Sf，藉此，於 對使左右一對鏈帶16、17彼此相互拉開之方向施加強橫拉 力時，在嚙合頸部78發生斷裂前，剖面積較小之腳部 72U、72D發生斷裂之可能性增高。 且’藉由構成為令嚙合頸部78之剖面積Sn、與腳部 72U、72D之剖面積之關係滿足〇 8><sn>sf，可更確實地 使斷裂早於剖面積Sn之嚙合頸部78而發生在剖面積Sf之腳 部 72U、72D。 又，除上述之剖面積Sf與剖面積Sn之關係以外，藉由令 薄片部72P之鏈布長度方向之尺寸大於嚙合頸部78之鏈布 長度方向之尺寸，可成為更適於發生斷裂之形狀。 在上述鏈齒12、13之一例中，以腳部72U、72〇之鏈布 長度方向之尺寸為11.8 mm、嚙合頸部78之鏈布長度方向 尺寸為5.4 mm、鏈齒12、13之厚度方向之尺寸為116 mm'芯部14之厚度方向尺寸為2·2 mm之鏈齒12、13而 吕，其 Sf=41 mm2、Sn=56 mm2，滿足上述之 〇 8><sn>sf之 關係。又，為維持鏈齒12 ' 13之安裝強度及防止腳部 72U、72D之變形，令薄片部72p之距離腳部72U、72D之 146170.doc •15- 201102013 鏈布面之厚度方向的尺寸形成為大於薄片部72P之距離腳 部72U、72D之表面之厚度方向的尺寸（薄片部72P之深度 尺寸）。較佳為，若將距離腳部72U、72D之鏈布面之厚度 方向上之最大尺寸設為100%，則該位置上之薄片部72P之 深度宜小於45%，且距離鏈布面之厚度宜為55%以上。剖 面積Sf與剖面積Sn可根據斷裂之鏈齒算出，或根據不同於 斷裂鏈齒之其他鏈帶16、17上的任意鏈齒算出。 當斷裂先於嚙合頸部78而發生於腳部72U、72D時，鏈 齒12、13會從之前一直安裝固定著的鏈布上脫離。在該狀 態下，於腳部72U、72D發生斷裂之鏈齒12、13之嚙合頭 部70及嚙合頸部78，依然維持與相對側之鏈齒1 3、12嚙合 之狀態。 即使鏈齒之腳部72U、72D發生斷裂，亦保持著嚙合頭 部70及嚙合頸部78之形狀，因此可維持左右一對鏈帶1 6、 17彼此之嚙合狀態。又，由於鏈齒之腳部72U、72D發生 斷裂而不能繼續使用之鏈齒會從鏈布脫落，因此在其後進 行安裝固定新鏈齒之修補時，無需再進行將斷裂之鏈齒 12 ' 13拆除之作業。 圖6所示之實施形態係顯示於腳部72U及腳部72D雙方均 形成凹形狀之薄片部72P的實施形態，然而將薄片部72P形 成於腳部72U及腳部72D之任何一方，且將腳部72U及腳部 72D之任何一方的剖面積Sf形成為小於嚙合頸部78之刳面 積Sn，藉此亦可使斷裂早於剖面積Sn之嚙合頸部78而發生 於剖面積Sf之腳部72U或腳部72D。又，該斷裂之強度低 146170.doc -16- 201102013 於使鏈布斷裂之強度。 其後，用圖7說明對於左右一對鏈帶16、17施加過大橫 拉力時所發生之鏈齒12 ' 13的斷裂狀況。圖7係顯示於鏈 齒12、13之腳部72U發生斷裂，而使鏈齒12、13從鏈帶 16、17脫落分離之狀態的立體圖。另，對於與圖3及圖4所 示之部位為相同部位者附註相同符號，且省略其說明。 如圖3所示，當對處於嚙合狀態之左右一對鏈帶16、 連續施加過大橫拉力時，形成為較小剖面積Sf之腳部 72U(或腳部72D)會早於設定為較強斷裂強度之鏈布或剖面 積較大之嚙合頸部78而發生斷裂。於是，鏈齒12、13對鏈 布女裝固疋之強度大致消失，從而使鏈齒12、13從鏈布脫 離。圖7所示之實施形態中，於腳部72U、72D之至少一部 分形成有形成為剖面積Sf之部分’因此’可更加確實地使 斷裂發生在剖面積Sf之腳部。 其後，用圖8〜圖11說明拉鏈之鏈齒中’使腳部之剖面積 Sf比嚙合頸部之剖面積Sn更加減小之另一實施例。 圖8係顯示安装固定於鏈帶丨16、丨17之鏈布之相對側緣 之鏈齒112、113的另一實施形態的立體圖。圖9係顯示使 圖8所示之左右一對鏈帶116、117之鏈齒112、U3彼此唾 合的嚙合狀態的圖，且在相對於鏈帶丨16、117之長度方向 成直角之剖面切斷的剖面圖《圖1〇係說明圖9所示之喝合 頊部78之X-X剖面之形狀、與該剖面積Sn的圖。圖n係說 明圖9所示之腳部mu、172D之XI-XI剖面之形狀、與該 剖面積Sf的圖。另，對於與圖4所示之鏈齒12、13之部位 146170.doc -17- 201102013 具有相同功能的部位附註相同符號，且嗜略其說明。 如圖8及圖9所示，鏈齒112、in具備橫跨鏈布之端緣而 安裝固定於鏈布之正背面（鏈布之第丨面及第2面）的腳部 172U及腳部172D(第1腳部及第2腳部）。另，圖8所示之立 體圖中，第2面側之腳部172D係隱藏於背面而觀察不到。 鏈齒112、113之腳部172U、172D之薄片部172p係形成 為相對於嚙合頸部78與鏈布平行地降低一階之薄型。兮薄 片部172P係平行延設於鏈布侧緣之芯部14且垂直於鏈布、 用以減少通過該芯部14之面之腳部172U、1 72D的剖面積 而形成的部分。 於圖9用虛線表示令鏈齒丨12、丨13彼此為嚙合狀態或分 離狀態之滑件150。圖9所示之滑件150,係從滑件15〇之1 合口側觀察將處於嚙合狀態之鏈齒112、113彼此插通之狀 態。於滑件150之内部，利用上翼片52、下翼片53、及凸 緣50F包圍而形成用以插通鏈齒112、n3之鏈齒引導通 路。又，在上翼片52之兩端緣延伸之凸緣5〇F、與由下翼 片53之兩端緣延伸之凸緣5〇F之間，形成有用以插通鏈布 之鏈布插通路。另，從上翼片52之上部中央向圖9所示之 上側立設的是用以安裝滑件15〇之拉片之拉片支持部％。 以下用圖10及圖11說明鏈齒112、113之嚙合頸部78之剖 面形狀、與薄片部172p之剖面形狀。圖1〇係說明圖9所示 之嚙合頸部78之X-X剖面之形狀、與該嚙合頸部冗之剖面 積Sn的圖。圖丨丨係說明圖9所示之腳部mu、i72D之幻， xi剖面之形狀、與該腳部172U、172D之剖面積“的圖。 146170.doc -18- 201102013 如圖10所示，鏈齒112、U3之嚙合頸部78之剖面係具有 相對於鏈齒112、ι13之厚度方向（相對於鏈布面為直角之 方向）長、相對於迖部14之長度方向短的大致長方形的剖 面°且從嚙合頸部78之較細的兩側壁，與芯部14之長度方 向平行延伸出2個表裡嚙合突片71。此處，將圖1〇所示之 嗜5减部78之最小剖面積定義為sn。圖1 〇所示之實施形態 中’顯示平行於鏈布之長度方向且正交於鏈布面之面的剖 面積’但本發明並非限定於該切斷面之剖面積，只要是嗜 合頸部78之最小剖面積的剖面即可。 其後’用圖1 1說明腳部172U、172D之剖面形狀。圖u 係顯示平行於鏈布之長度方向且正交於鏈布面之面、且通 過芯部14之大致中央部之腳部n2lJ、i72D的剖面。另， 思部14係顯示其外觀而非剖面。 在橫跨芯部14而將腳部172U、172D安裝固定於鏈布之 部分之背側之鏈齒112、113之開放側之表面，形成有薄於 嚙合頸部78之形狀之薄片部172p。藉由形成該薄片部 172P，可減少通過芯部14之面之腳部n2u、172〇之剖面 積。 此處，如圖11所示，將平行於鏈布之長度方向之腳部 172U' 172D之剖面積設為Sf之情形下，形成為使其與上 述嚙合頸部78之剖面積811之關係滿足Sn>Sf，藉此，於對 使左右-對鏈帶116、117彼此相互拉開之方向施加強橫拉 力時，在喷合頸部78發生斷裂前，剖面積較小之腳部 172U、172D發生斷裂之可能性增高。 146170.doc 19 201102013 且’藉由構成為令嗔合頸部78之剖面積Sn、與腳部 172U、172D之剖面積％之關係滿足〇 8>^〇>%，可更確實 地使斷列早於剖面積〜之响合頸部78而發生在剖面積攸 腳部 172U、172D。 當斷裂先於嚙合頸部78而發生在腳部n2u、172〇時， 鏈齒112、113會從之前—亩忠锭m —从 θ攸之刖直女裝固疋者的鏈布上脫離。在 該狀態下，腳部172U、172D發生斷裂之鏈齒112、Η]之 嚙合頭部70及嚙合頸部78，依然維持與相對側之鏈齒 113、112嚙合之狀態。 即使鏈齒之腳部172卜172D發生斷裂’亦保持。齒合頭 部70及喃合頸部78之形狀’因此可維持左右一對鏈帶 116' m彼此之4合狀態。又，由於鍵齒之腳部m 172D發生斷裂而^能繼續使用之鏈齒會從鏈布脫落，因此 在其後進行安裝固定新鏈齒之修補時，無需再進行將斷裂 之鏈齒112、113拆除之作業。 一對鏈布之相 而本發明並非 亦可適用於具 另，圖10及圖11所示之實施形態係於左右 對如緣延设比鏈布厚實地形成之芯部1 4，然 限定於鏈布上具有芯部I4之鏈帶116、117， 有不包含芯部14之平面狀之鏈布的鏈帶。 又，圖u所示之實施形態係顯示於腳部Π2υ及腳部 mD雙方均形成薄片部172P的實施形態，然而將薄片部 形成於腳部⑽及腳部17扣之任何—方，且將腳部 172U及腳部172D之任何一方的剖面積_成為小於嚙合 頸部78之剖面積Sn，藉此亦可使斷裂早於剖面積％之嚙^ 146170.doc •20· 201102013 頸部78而發生在剖面積Sf之腳部172U或腳部172D。 其後，用圖12及圖13說明如圖7所示若因施加過大橫拉 力等，使鏈齒12、13從鏈帶16、17脫落之情形下，於該鏈 齒12、13脫落之部分重新安裝之修補用鏈齒212的構成。 圖12係顯示將修補用鏈齒212安裝固定於鏈帶16、17之前 的狀態的圖，且顯示以正交於鏈布之長度方向之剖面切斷 之狀態的剖面圖。又’圖13係顯示已將修補用鏈齒2丨2安 裝固定於鏈帶16、17之狀態的剖面圖。另，對於與圖4所 示之鏈齒1 2、13之部位具有相同功能的部位附註相同符 號，且省略其說明。 如圖12及圖13所示，修補用鏈齒212係於表裡方向分割 為2半之鏈齒。圖12及圖13所示之2個修補用鏈齒212係使 用相同形狀者，然而亦可組合不同形狀者。 將修補用鏈齒212安裝固定於鏈帶16、17時，首先使用 夹具等於㈣16、17之特定位置將2個修補用鏈齒212從鍵 布表裡方向爽住而定位。其後，於鏈布上開設安裝固定用 之孔將螺，、糸21 〇插通於2個修補用鏈齒2丨2之螺絲孔2丨2H ”上述開。又之安裝固定用之孔。其後，由相反側鎖緊螺母 211 ’將2個修補用鏈齒212安裝固定於鏈布。如此，可簡 單地進行鏈帶16、17之修補。該作業亦可於吊起定置網2 之船上進行。另，作為修補用鏈齒212之素材，可使用不 銹鋼或銅合金等金屬。 產業上之可利用性 本發明之鏈帶之用途不限定於定置網彼此之接合之用 ^ S3 146170.doc 201102013 途。 【圖式簡單說明】 圖1係顯示將拉鏈應用於魚之養殖用定置網之接合用的 使用例的圖。 圖2係將定置網之網彼此接合之拉鏈附近的放大平面 圖。 圖3係將圖2所示之處於嚙合狀態之鏈帶之一部分放大顯 示的立體圖。 圖4係圖2及圖3所示之鏈齒之放大平面圖β 圖5係說明圖4所示之嚙合頸部之V-V剖面之形狀、與該 嚙合頸部之剖面積Sn的圖。 圖6係說明圖4所示之腳部之VI-VI剖面之形狀、與該腳 部之剖面積Sf的圖。 圖7係顯示因鏈齒之腳部發生斷裂而使得鏈齒從鏈帶脫 落之狀態的立體圖。 圖8係顯示鏈帶之鏈布之相對側緣上所安裝固定之鏈齒 的另一實施形態的立體圖。 圖9係顯示將圖8所示之左右一對鏈帶之鏈齒彼此嚙合的 嚙合狀態的圖。 圖1〇係說明圖9所示之嚙合頸部之χ·χ剖面之形狀 '與 該嚙合頸部之剖面積Sn的圖。 圖Π係說明圖9所示之腳部之χι_χι剖面之形狀、與該腳 部之剖面積Sf的圖。 圖12係顯示將修補用鏈齒安裝固定於鏈帶之前之狀態的 146170.doc -22- 201102013 剖面圖。 圖13係顯示已將修補用鏈齒安裝固定於鏈帶之狀態的剖 面圖。 圖14係說明對先前之拉鏈施加較強橫拉力時發生之損壞 狀態的圖。 ^ 【主要元件符號說明】 2 定置網 4 網 10 、 910 拉鍵 12 、 13 、 112 、 113 、 鏈齒 912 ' 913 14 芯部 16 、 17 、 916 、 917 鏈帶 18 上止擋 19 開尾筒 50 、 150 滑件 50F 凸緣 52 上翼片 53 下翼片 56 拉片支持部 70 合頭部 71 表裡<#合突片 72D、72U、172D、172U 腳部 72P > 172P 薄片部 146170.doc -23 - 201102013 73 表裡嚙合凹部 78 嚙合頸部 210 螺絲 211 螺母 212 修補用鏈齒 212H 螺絲孔 920 斷裂 921 斷裂 Sf 鏈齒之腳部之剖面積 Sn 鏈齒之嚙合頸部之剖面積 146170.doc 24 ·The Sf is a cross-section that is parallel to the extended core portion and passes through the surface of the core. Further, in a preferred configuration, the cross-sectional area Sn and the cross-sectional area "between" satisfy a relationship of 0.8xSn > Sf. Preferably, the size is thinner than at least one of the second and second leg portions. Further, it is preferable that the sheet portion is formed in the concave portion in the thickness direction of the neck portion and the sheet portion of the cross-sectional area Sf is reduced. 146170.doc 201102013 Further, preferably, the sheet portion is formed in a concave shape on the first and second leg portions. Further, it is preferable that the dimension of the longitudinal direction of the sheet portion of the concave shape is larger than the dimension of the longitudinal direction of the meshing neck portion. Further, it is preferably made of resin. A part of the key strip of the key row is placed on the sprocket row of the resin, and the fastener sprocket which is made of metal and is divided into two halves in the direction of the front and the bottom is clamped, and then screwed and fixed to the chain. The effect of the invention is that the chain belt 'according to the smallest cross-sectional area Sn of the above-mentioned spray neck of the fastener teeth arranged at the opposite end edges of the fastener tape, and the sectional area % of the right leg portion 'satisfying Sn>; Sf relationship, therefore, in the right and left - right With each other: a strong transverse force is applied in the direction of pulling apart, and the fracture occurs at the foot having a small cross-sectional area before the meshing neck breaks. When the fracture occurs before the meshing neck and occurs at the foot of the fastener element, The sprocket will be detached from the previously attached chain cloth. Even if the rupture occurs in the foot, the meshing head and the engaging neck of the sprocket remain in mesh with the opposite side of the sprocket. Even the chain The foot of the tooth is broken, and the shape of the meshing head and the salivating neck can be maintained, so that the pair of left and right chain belts can be maintained in each other's state. Moreover, it is impossible to continue using the foot of the chain tooth. The sprocket will be detached from the chain cloth, so that when the new sprocket is repaired and fixed, there is no need to perform the work of removing the broken sprocket. Further, the chain is extended at the opposite end of the pair of left and right chain fabrics. In the case where the core portion is formed thickly and the leg portion of the fastener element is attached across the core portion, 146170.doc 201102013 is parallel to the core portion of the chain cloth and passes through the surface of the core portion. Sectional area is Sf When the minimum sectional area of the meshing neck is Sn, the relationship of Sn > Sf is satisfied. Thus, when a transverse tensile force exceeding the breaking strength is applied, the fracture can occur earlier than the meshing neck of the sectional area Sn and occurs through the core. In the leg portion of the cross-sectional area, the relationship between the cross-sectional area Sn of the meshing neck portion and the cross-sectional area Sf of the leg portion is satisfied to satisfy the 〇.8xSn>Sf, and the fracture can be more reliably made earlier than the cross-sectional area Sn. The neck portion is engaged with the leg portion passing through the cross-sectional area of the core portion. Further, the first or second leg portion is formed to be thinner than the thickness direction of the meshing neck portion, and the cross-sectional area is reduced.胄, the strength of the foot can be maintained to ensure a specific lateral pulling force of the zipper, and the fracture can occur earlier than the meshing neck portion of the sectional area Sn and the foot portion passing through the cross-sectional area of the core. Further, by forming the sheet portion of the second or second leg portion in a concave shape, even if a small amount of foreign matter adheres to the i-th or the second leg portion, the foreign matter enters the concave shape due to the sliding of the second object. Thin ^, so it can slide smoothly: It is especially suitable for use in, for example, the use of a zipper in a sea of people to clean the fastener rows. The size of the 乂 direction is such that the rupture is suitable, and the length of the chain of the concave-shaped sheet portion is formed to be larger than the dimension of the length of the chain of the engaging neck. Fang 6 八,, hard 鲫衮 鲫衮 f f, as long as the metal is made: the knife is 2 half of the repair with a chain to clamp the chain, % ^ ^ λ * ^ - line screwed with | cracked chain teeth Hunting this can easily repair the chain. 146I70.d〇 201102013 [Embodiment] Hereinafter, a representative embodiment of a slide fastener to which the fastener tape of the present invention is applied will be specifically described. Fig. 1 is a view showing a use example in which (10) ig of the chain belts 16, 17 of the present invention is applied to the joining of the fixed net 2 for fish culture. Further, Fig. 2 is an enlarged plan view showing the vicinity of the zipper 1 接合 which joins the nets 4 of the fixed net 2 to each other. In the embodiment shown in Fig. 1, a plurality of zippers 1 使用 are used for joining the nets 4 constituting the fixed net 2 having a circumference of about 2 〇 m. For example, the fixed net 2 shown in the figure is used for the culture of squid and has been used continuously for more than 3 years. As shown in FIG. 1 and FIG. 2, by forming a fixed net 2 by joining a plurality of nets 4 using a zipper 1 , the manufacture and installation and disassembly of the net 4 and the fixed net 2 can be easily performed, and the repair can be easily performed due to use. Damaged net 4. Next, the configuration of the slide fastener 10 will be described with reference to Fig. 2 . As shown in Fig. 2, the zipper (7) includes a pair of left and right chain belts 16, 17 and a slider 5'. A plurality of fastener elements 12, 13 are attached and fixed to the opposite side edges of the chain fabric constituting the pair of left and right chain belts 16, 17 so as to be aligned with the core portion 14. The embodiment shown in Fig. 2 shows that the fixed sprocket 12, 13 is attached across the core portion 14 which is thickly extended in the form of the opposite end edges of the chain cloth, but the present invention is not limited to the The embodiment in which the opposite end edges form the core portion 14 can also be applied to the fastener elements attached to the chain cloth not including the core portion 14. The fixed sprocket 12, 13 is mounted across the cores 14 which are extended in the form of the opposite end edges of the chain cloth, and are arranged in the chain belts 16, 17 in the state shown in FIG. One end of the row of the sprocket teeth 12, 13 opposite the end edge (the upper end portion in the example shown in Fig. 2) is respectively connected to prevent the slide member 50 from coming off and to restrict the stop 18 above the moving range. 146170.doc -10· 201102013 Further, the other end of the row of the fastener elements arranged in the end edge of the chain belt 17 (the lower end portion in the example shown in the figure) is attached and fixed to prevent the slider from falling off. The tail cylinder 19 that limits its range of movement. The upper stopper 18 is connected to each of the respective chain belts 16, 17 and the tail cylinder 19 is attached and fixed only to the side of the chain belt 17. Further, the other end (the lower end portion in the example shown in Fig. 2) of the row of the fastener elements 12 arranged at one end edge of the fastener tape 16 is connected to the insertion portion which is opened in the opening cylinder η. Insert the pin 3G. Further, as the material of the sprocket 2, η, the tail cylinder 19, and the yoke 30, a resin molded article such as a polycondensation can be used. When the slider 50 is lowered in the direction shown in Fig. 2 by the state shown in Fig. 2, it is introduced into the twisted state I2, 13 from the fitting opening which is opened toward the lower side of the slider 50. On the other hand, the left and right sprocket teeth 12 and 13 in the separated state are led out from the introduction ports of the right and left openings above the slider 5'. If the slider 50 is further lowered, the engaging opening of the slider 50 abuts against the tailing cylinder 19 and reaches the lowermost position. In this state, if the chain belt 16 is pulled upward as shown in Fig. 2, the pin 30 is disengaged from the tail cylinder 19, and the left and right chain belts 16'17 are separated from each other. When the left and right chain belts 16, 17 in the separated state are rejoined to each other, the engaging opening of the slider 50 is first lowered to abut against the lowermost portion of the tailing cylinder. Thereafter, the pin 3 attached to the end edge of the fastener tape 16 is inserted from the introduction port on the left side of the slider 50 shown in Fig. 2, and inserted into the insertion portion of the tail cylinder. Thereafter, the slider 50 (moving upward as shown in Fig. 2) is pulled up. Then, the left and right key teeth 12, U which are in the separated state are introduced from the introduction ports which are opened to the left and right of the upper portion of the slider 50, and the key teeth 12, 13 which are in the engaged state are led out from the engagement opening of the slider 50. Thus, the separation and joining of the nets 4 can be easily performed. The separation and joining nets 4 are relatively simple to each other 146170.doc -11 - 201102013, so they can also be carried out in water. Next, the configuration of the fastener tapes 16 and 17 of the present invention and the configuration of the fastener elements 2 and 3 disposed at the opposite end edges thereof will be described with reference to Figs. 3 and 4 . Fig. 3 is a perspective view showing an enlarged view of a portion of the fastener tapes 16, 17 shown in Fig. 2 in an engaged state. Figure 4 is an enlarged plan view of the sprocket 12, 13 shown in Figures 2 and 3. As shown in Fig. 3, the fastener elements 12 and 13 are respectively arranged at the opposite end edges of the pair of left and right chain belts 16 and 7. A core portion 14 which is thicker than the chain cloth is extended on the opposite end edges of the chain fabrics constituting the pair of left and right chain belts 16, 17. Further, the fastener elements 12 and 13 are attached and fixed to the fastener fabric in a form that straddles the core portion 14 (the core portion 14 is sandwiched between the front and back sides). As shown in Fig. 4, the sprocket 12 has a leg and an ankle P72D which are attached to the front side of the chain cloth (the i-th surface and the second surface of the chain cloth). Feet and 2nd chat). In addition, the state shown in FIG. 3 and FIG. 4 is hidden from the back side of the two sides of the chain surface of the chain belts 16 and 17 on the second side. I can't see it. From the leg portion 72U and the leg portion 72D, the sprocket teeth 13 and 12 on the opposite side extend to engage the four portions 7 8 . The engaging head portion 7A is extended from the engaging neck portion 78 to the opposite side of the sprocket 3, 丨 2 in a convex manner. The engaging neck portion 78 is formed in a thinner portion between the leg portions 72U, 72D and the engaging head portion 70. The engaging neck portion 78 is engaged with the protruding head portion of the opposite side of the sprocket 13, 12 when engaged, and the meshing neck portion 78 and the engaging head portion 7 are mutually engaged to withstand the left and right sides. The transverse pulling force of the pair of chain belts 16, 17 in the direction in which they are pulled apart from each other. Further, as shown in Fig. 4, from the thinner portion of the engaging neck portion 78 of the sprocket 12, 13 to the leg portions 72U, 72D, on both sides of the engaging neck portion 78 is parallel to the chain cloth and 146170.doc -12-201102013 Two in-body engaging tabs 71 are extended. The dimension of the fastener element 71 in the longitudinal direction of the above-mentioned surface is larger than the dimension of the longitudinal direction of the leg portions 72U and 72D. Further, in the center portion of the top portion of the engaging head portion 70 (in the thickness direction of the end portion on the opposite side to the leg portions 72U, 72D), the inner surface engaging recess portion 73 parallel to the chain cloth is opened. The engagement recess 73 in the crown is engaged in the front surface of the fastener elements 13, 12 on the opposite side when engaged. A portion of the toothed tab 71. When engaged, the in-surface engaging tabs 71 of the opposite side sprocket teeth 13, 12 are inserted into the front and rear engaging recesses 73, thereby resisting the upper thrust applied in the vertical direction (thickness direction) with respect to the chain fabric surface. 'Preventing the sprocket 2, 丨3 in the engaged state from each other in the vertical direction with respect to the chain surface. In the embodiment shown in Fig. 2 and Fig. 3, a portion of the surface opposite to the chain surface of the leg portions 72U and 72D is formed with a concave portion 72P which is concave in plan view. The purpose of forming the sheet portion 72P is to reduce the cross-sectional area of the leg portions 72U, 72D in the cross section passing through the core portion 14 which is parallel to the core portion 14 extending over the side edge of the fastener fabric and perpendicular to the fastener fabric. Next, the cross-sectional shape of the meshing neck portion 78 of the fastener elements 12 and 13 and the cross-sectional shape of the sheet portion 72P will be described with reference to Figs. 5 and 6 . Fig. 5 is a view showing the shape of the V_V cross section of the engaging neck portion 78 shown in Fig. 4 and the sectional area of the engaging neck portion. Fig. 6 is a view for explaining the shape of the cross section of the leg portions 72U and 72) shown in Fig. 4, and the cross-sectional area Sf of the leg portions 72U and 72D. As shown in Fig. 5, the section of the engaging neck portion 78 of the sprocket 12, 13 has a length relative to the thickness direction of the sprocket 12, 13 (the direction perpendicular to the surface of the chain fabric), relative to the 丨4 A generally rectangular cross section with a short longitudinal direction. And from the thinner side walls of the engaging neck portion 78, parallel to the length direction of the core portion 14 146170.doc -13· 201102013, two front and rear engaging projections 71 are extended. Here, the minimum sectional area of the engaging neck portion 78 shown in Fig. 5 is defined as Sn. In the embodiment shown in Fig. 5, the cross-sectional area parallel to the longitudinal direction of the chain cloth and orthogonal to the surface of the chain fabric surface is shown, but the present invention is not limited to the cross-sectional area of the cut surface, and the cross-sectional area "the cross-section is only It is sufficient to obtain a cross section of the minimum cross-sectional area of the engaging neck portion 78. Thereafter, the cross-sectional shape of the leg portions 72U, 72D will be described with reference to Fig. 6. Fig. 6 shows the direction parallel to the longitudinal direction of the chain cloth and orthogonal to the chain cloth surface. The surface passes through the cross section of the leg portions 72U, 72D of the substantially central portion of the core portion 14. The core portion shows the appearance rather than the cross section. As shown in Fig. 6, the cross-sectional shape of the leg portions 72U, 72D is The both sides of the core portion 14 of the leg portions 72U and 72D in the longitudinal direction are set to be high, and the rigidity of the leg portions 72U and 72D can be maintained. Further, even if a pair of chain belts 16 and 17 are engaged to the left and right in the engaged state, a horizontal cross is applied. When the tension is applied, the leg portions 72u and 72D can be prevented from opening and the core portion 14 can be detached. Generally, after the zipper is sunk into the sea for several years, foreign matter such as seaweed or shellfish is attached thereto to hinder the sliding. Sliding of the piece, however, the zipper 10' of the above-mentioned sprocket 12, 13 is shaped The sheet portions 72P of the leg portions 72U, 72D of the fastener elements 12, 13 are located more concave than the surfaces of the leg portions 72U, 72D. Therefore, when the slider 50 is slid, foreign matter enters the concave portion, thereby also The sliding effect can be smoothly performed. The leg portions 72U and 72D are attached and fixed to the back side of the portion of the fastener fabric on the back side of the portion of the fastener fabric, and a part of the surface of the open side of the fastener elements 12 and 13 is formed. The portion 72P. By forming the sheet portion up, the cross-sectional area of the leg portions 72U, 72D passing through the surface of the core portion 14 can be reduced. Further, as shown in Fig. 2 to Fig. 146I70.doc -14·201102013 and Fig. 6, A portion of the surface of the open side of the sprocket 12, 13 is formed into a concave-shaped sheet portion 72P, and the outer shape of the sprocket 12, 13 is maintained at the same size as the previous sprocket, thereby serving as the sprocket 12, In the case of the sliding member for meshing and separating 13, a standard sliding member can be used. Here, as shown in Fig. 6, the cross-sectional areas of the leg portions 72U and 72D parallel to the longitudinal direction of the chain cloth are respectively set to %. It is formed such that the relationship with the sectional area Sn of the above-described ringing neck portion 78 satisfies Sn > Sf, whereby the pair is left When a strong transverse pulling force is applied in a direction in which the pair of chain belts 16 and 17 are pulled apart from each other, the possibility that the leg portions 72U and 72D having a small cross-sectional area are broken before the meshing neck portion 78 is broken is increased. The relationship between the sectional area Sn of the engaging neck portion 78 and the sectional area of the leg portions 72U, 72D satisfies 〇8><sn>sf, and the fracture can occur more reliably than the meshing neck portion 78 of the sectional area Sn. The leg portions 72U and 72D of the cross-sectional area Sf. In addition to the relationship between the cross-sectional area Sf and the cross-sectional area Sn described above, the dimension of the longitudinal direction of the sheet portion 72P is made larger than the longitudinal direction of the meshing neck portion 78. The size can be a shape more suitable for fracture. In one of the above-mentioned fastener elements 12, 13, the dimension of the chain fabric in the longitudinal direction of the leg portions 72U, 72 is 11.8 mm, the length of the fastener neck 78 is 5.4 mm, and the thickness of the fastener elements 12, 13 is The dimension of the direction is 116 mm' ribs 12, 13 of the core portion 14 having a thickness direction of 2·2 mm, and Sf = 41 mm2, Sn = 56 mm2, which satisfies the above &8><sn>sf Relationship. Further, in order to maintain the mounting strength of the fastener elements 12'13 and prevent the deformation of the leg portions 72U, 72D, the sheet portion 72p is formed in the thickness direction of the 146170.doc • 15-201102013 chain cloth surface of the leg portions 72U and 72D. It is larger than the thickness of the surface of the leg portions 72U and 72D of the sheet portion 72P (the depth dimension of the sheet portion 72P). Preferably, if the maximum dimension in the thickness direction of the chain fabric surface from the leg portions 72U, 72D is set to 100%, the depth of the sheet portion 72P at the position is preferably less than 45%, and the thickness of the chain fabric surface is It should be more than 55%. The sectional area Sf and the sectional area Sn can be calculated from the broken sprocket or from any sprocket on the other chain belts 16, 17 which are different from the broken sprocket. When the break occurs in the foot portions 72U, 72D prior to the engagement of the neck portion 78, the fastener elements 12, 13 are detached from the previously attached chain cloth. In this state, the engaging head portion 70 and the engaging neck portion 78 of the sprocket 12, 13 which are broken at the leg portions 72U, 72D are maintained in a state of being engaged with the sprocket 13 and 12 on the opposite side. Even if the leg portions 72U and 72D of the sprocket are broken, the meshing head portion 70 and the engaging neck portion 78 are maintained in shape, so that the meshing state of the pair of left and right chain belts 16 and 17 can be maintained. Further, since the sprocket portions 72U and 72D are broken and the sprocket which cannot be used continuously is detached from the chain cloth, it is not necessary to perform the sprocket 12' which will be broken when the fixing of the new sprocket is fixed. 13 Demolition work. The embodiment shown in FIG. 6 is an embodiment in which the sheet portion 72P having a concave shape is formed on both the leg portion 72U and the leg portion 72D. However, the sheet portion 72P is formed on either of the leg portion 72U and the leg portion 72D, and The cross-sectional area Sf of either of the leg portion 72U and the leg portion 72D is formed to be smaller than the meandering area Sn of the engaging neck portion 78, whereby the meshing of the neck portion 78 of the cross-sectional area Sn may occur at the foot of the cross-sectional area Sf. Part 72U or foot 72D. Moreover, the strength of the fracture is low 146170.doc -16-201102013 in the strength of the chain break. Thereafter, the fracture state of the fastener element 12' 13 which occurs when an excessive lateral pulling force is applied to the pair of left and right chain belts 16, 17 will be described with reference to Fig. 7 . Fig. 7 is a perspective view showing a state in which the leg portions 72U of the fastener elements 12, 13 are broken, and the fastener elements 12, 13 are separated from the chain belts 16, 17. The same components as those shown in Figs. 3 and 4 are denoted by the same reference numerals, and their description will be omitted. As shown in FIG. 3, when a large lateral pulling force is continuously applied to the pair of left and right chain belts 16 in the engaged state, the foot portion 72U (or the foot portion 72D) formed to have a smaller sectional area Sf is set earlier than the strong one. The chain of fracture strength or the neck portion 78 having a large cross-sectional area is broken. Thus, the strength of the fastener elements 12, 13 to the fasteners is substantially eliminated, so that the fastener elements 12, 13 are separated from the fastener. In the embodiment shown in Fig. 7, at least a part of the leg portions 72U and 72D is formed with a portion which is formed as a sectional area Sf. Therefore, it is possible to more reliably cause the fracture to occur in the leg portion of the sectional area Sf. Thereafter, another embodiment in which the sectional area Sf of the leg portion is made smaller than the sectional area Sn of the engaging neck portion in the fastener element of the slide fastener will be described with reference to Figs. Fig. 8 is a perspective view showing another embodiment of the fastener elements 112 and 113 which are attached to the opposite side edges of the fastener tapes of the fastener tapes 16 and 丨17. Fig. 9 is a view showing a meshing state in which the sprocket teeth 112, U3 of the pair of left and right chain belts 116, 117 shown in Fig. 8 are sprinkled with each other, and at a right angle to the longitudinal direction of the chain belts 16, 117. Fig. 1 is a view showing the shape of the XX cross section of the drinking joint portion 78 shown in Fig. 9 and the sectional area Sn. Figure n is a view showing the shape of the XI-XI cross section of the leg portions mu and 172D shown in Fig. 9 and the cross-sectional area Sf. In addition, the same reference numerals are given to the portions having the same functions as those of the portions 146170.doc -17- 201102013 of the fastener elements 12 and 13 shown in Fig. 4, and the description thereof will be omitted. As shown in FIGS. 8 and 9, the fastener elements 112 and in are provided with a leg portion 172U and a leg portion that are attached and fixed to the front and back surfaces of the chain cloth (the second surface and the second surface of the chain cloth) across the edge of the chain cloth. 172D (1st foot and 2nd foot). Further, in the plan view shown in Fig. 8, the leg portion 172D on the second surface side is hidden from the back surface and is not observed. The sheet portions 172p of the leg portions 172U, 172D of the fastener elements 112, 113 are formed to be thinner in a stepwise manner with respect to the meshing neck portion 78 in parallel with the chain cloth. The thin sheet portion 172P is formed in parallel with the core portion 14 of the side edge of the chain fabric and perpendicular to the chain cloth to reduce the cross-sectional area of the leg portions 172U and 172D passing through the surface of the core portion 14. The slider 150 which causes the sprocket 12 and the cymbal 13 to be in an engaged state or a separated state is indicated by a broken line in Fig. 9 . The slider 150 shown in Fig. 9 is in a state in which the sprocket teeth 112, 113 which are in an engaged state are inserted from each other as viewed from the side of the joint of the slider 15'. Inside the slider 150, the upper blade 52, the lower blade 53, and the flange 50F are surrounded to form a fastener guide path for inserting the fastener elements 112 and n3. Further, between the flange 5〇F extending at both end edges of the upper flap 52 and the flange 5〇F extending from the both end edges of the lower flap 53, a chain insert for inserting the link fabric is formed. path. Further, from the center of the upper portion of the upper flap 52 to the upper side shown in Fig. 9, the tab support portion % for attaching the slider of the slider 15 is attached. The cross-sectional shape of the meshing neck portion 78 of the fastener elements 112 and 113 and the cross-sectional shape of the sheet portion 172p will be described below with reference to Figs. 10 and 11 . Fig. 1 is a view showing the shape of the X-X cross section of the engaging neck portion 78 shown in Fig. 9 and the cross-sectional area Sn of the engaging neck portion. FIG. 9 is a view showing the shape of the foot mu, i72D, the shape of the xi cross section, and the sectional area of the leg portions 172U and 172D. 146170.doc -18-201102013 is as shown in FIG. The cross section of the meshing neck portion 78 of the sprocket 112 and U3 has a substantially rectangular shape that is long in the thickness direction of the sprocket 112 and ι 13 (the direction perpendicular to the chain surface) and short in the longitudinal direction of the dam portion 14. The cross-section and from the thinner side walls of the engaging neck portion 78 extend in parallel with the longitudinal direction of the core portion 14 to form two front and rear engaging projections 71. Here, the fifth-substance portion 78 shown in FIG. The minimum cross-sectional area is defined as sn. In the embodiment shown in Fig. 1, "the cross-sectional area parallel to the longitudinal direction of the chain fabric and orthogonal to the surface of the chain fabric" is shown, but the present invention is not limited to the cross-section of the cut surface. The area may be a cross section of the smallest cross-sectional area of the neck portion 78. Hereinafter, the cross-sectional shape of the leg portions 172U and 172D will be described with reference to Fig. 11. The figure u is parallel to the longitudinal direction of the chain cloth and orthogonal to A cross section of the surface of the chain cloth passing through the leg portions n2lJ and i72D of the substantially central portion of the core portion 14. The structure of the 14 series shows the appearance rather than the cross section. The surface of the open side of the sprocket 112, 113 which is mounted on the back side of the portion where the leg portions 172U, 172D are mounted and fixed across the core portion 14 is formed to be thinner than the neck portion. The sheet portion 172p having the shape of the portion 78. By forming the sheet portion 172P, the cross-sectional area of the leg portions n2u, 172A passing through the surface of the core portion 14 can be reduced. Here, as shown in Fig. 11, it will be parallel to the chain cloth. When the cross-sectional area of the leg portion 172U' 172D in the longitudinal direction is Sf, the relationship between the leg portion 811 and the cross-sectional area 811 of the meshing neck portion 78 is satisfied to satisfy Sn > Sf, thereby making the right and left-pair chain When the strong transverse force is applied in the direction in which the belts 116 and 117 are pulled apart from each other, the possibility that the leg portions 172U and 172D having a small cross-sectional area are broken before the breakage of the sprayed neck portion 78 is increased. 146170.doc 19 201102013 The relationship between the sectional area Sn of the kneading neck portion 78 and the sectional area % of the leg portions 172U and 172D satisfies 〇8>^〇>%, and the breaking can be made more surely than the sectional area. The neck portion 78 is formed in the cross-sectional area of the leg portion 172U, 172D. When the break precedes the meshing neck 78 When the foot n2u, 172 发生 occurs, the sprocket 112, 113 will be detached from the chain of the former 亩 锭 锭 — 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The meshing head 70 and the engaging neck portion 78 of the sprocket 119, which is broken, remain in a state of meshing with the sprocket 113, 112 on the opposite side. Even if the leg portion 172 of the sprocket 172D breaks, it remains The shape of the toothed head portion 70 and the merging neck portion 78 can thus maintain the state in which the pair of left and right chain belts 116'm are in a state of being joined to each other. Further, since the leg portion m 172D of the key tooth is broken and the sprocket which can continue to be used is detached from the chain cloth, it is not necessary to perform the sprocket 112 to be broken when the new sprocket is repaired and fixed. 113 Demolition work. The present invention is not applicable to the other embodiments. The embodiment shown in FIGS. 10 and 11 is a core portion 14 formed thicker than the chain cloth at the left and right sides, but is limited to The chain belts 116, 117 having the core portion I4 on the chain cloth have a chain belt which does not include the planar chain cloth of the core portion 14. Further, the embodiment shown in Fig. u is an embodiment in which both the leg portion υ2υ and the leg portion mD are formed with the sheet portion 172P. However, the sheet portion is formed on any of the leg portion (10) and the leg portion 17 and will be The sectional area _ of either of the leg portion 172U and the leg portion 172D is smaller than the sectional area Sn of the engaging neck portion 78, whereby the fracture can be made earlier than the sectional area % of the neck portion 146170.doc • 20· 201102013 It occurs in the leg portion 172U or the leg portion 172D of the sectional area Sf. Then, as shown in Fig. 12, when the fastener elements 12 and 13 are detached from the fastener tapes 16 and 17 due to excessive lateral pulling force or the like as shown in Fig. 7, the portions of the fastener elements 12 and 13 are detached. The configuration of the repaired sprocket 212 is reinstalled. Fig. 12 is a view showing a state before the fixing sprocket 212 is attached and fixed to the fastener tapes 16, 17, and shows a cross-sectional view taken along a section perpendicular to the longitudinal direction of the fastener fabric. Further, Fig. 13 is a cross-sectional view showing a state in which the repairing sprocket 2 2 is attached and fixed to the fastener tapes 16 and 17. It is noted that the same reference numerals are given to the parts having the same functions as those of the elements of the sprocket 1 and 2 shown in Fig. 4, and the description thereof will be omitted. As shown in Figs. 12 and 13, the repairing sprocket 212 is divided into two halves of the fastener element in the front and rear directions. The two repairing sprocket teeth 212 shown in Figs. 12 and 13 are of the same shape, but may be combined with different shapes. When the repairing sprocket 212 is attached and fixed to the fastener tapes 16, 17, first, the two repairing fastener elements 212 are cooled and positioned from the front and rear of the key cloth using a specific position of the clamp equal to (4) 16, 17. Thereafter, a hole for mounting and fixing is attached to the chain cloth, and the screw is inserted into the screw holes 2丨2H of the two repairing fastener elements 2丨2, and the hole for mounting is fixed. Thereafter, the two repairing fastener elements 212' are attached and fixed to the chain cloth by the opposite side lock nut 211'. Thus, the repair of the chain belts 16, 17 can be easily performed. This operation can also be carried out on the ship of the fixed net 2 Further, as the material of the repairing sprocket 212, a metal such as stainless steel or a copper alloy can be used. INDUSTRIAL APPLICABILITY The use of the fastener tape of the present invention is not limited to the joining of the fixed nets to each other ^ S3 146170.doc 201102013 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an example of use for joining a zipper to a fixed net for fish culture. Fig. 2 is an enlarged plan view showing a vicinity of a zipper in which nets of a fixed net are joined to each other. Figure 2 is an enlarged plan view showing a portion of the chain in the engaged state. Figure 4 is an enlarged plan view of the fastener elements shown in Figures 2 and 3. Figure 5 is a VV profile of the meshing neck shown in Figure 4. Shape and cross section of the meshing neck Fig. 6 is a view showing the shape of the VI-VI cross section of the leg shown in Fig. 4 and the sectional area Sf of the leg. Fig. 7 shows the chain caused by the fracture of the foot of the sprocket. Fig. 8 is a perspective view showing another embodiment of the fastener element attached to the opposite side edge of the fastener tape of the fastener tape. Fig. 9 is a view showing the left and right sides shown in Fig. 8. Fig. 1 is a view showing the relationship between the shape of the 颈部·χ cross section of the meshing neck portion shown in Fig. 9 and the sectional area Sn of the meshing neck portion. Fig. 9 is a view showing the shape of the χι_χι cross section of the leg portion and the sectional area Sf of the leg portion. Fig. 12 shows the state before the fixing sprocket is attached to the chain 146170.doc -22-201102013 Fig. 13 is a cross-sectional view showing a state in which the repairing fastener element has been attached to the fastener tape. Fig. 14 is a view showing a state of damage occurring when a strong lateral pulling force is applied to the previous zipper. 】 2 fixed network 4 network 10, 910 pull keys 12, 13, 112, 11 3, sprocket 912 ' 913 14 core 16 , 17 , 916 , 917 chain belt 18 upper stop 19 open tail cylinder 50 , 150 slide 50F flange 52 upper wing 53 lower wing 56 pull tab support 70 Head 71 Table <#Head tab 72D, 72U, 172D, 172U Foot 72P > 172P Sheet portion 146170.doc -23 - 201102013 73 Table meshing recess 78 Engagement neck 210 Screw 211 Nut 212 Repair chain Tooth 212H screw hole 920 break 921 break Sf sprocket foot section area Sn sprocket meshing neck section area 146170.doc 24 ·