1378879 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種管製一體成变自行車前又管及其製 程’尤指製作一種可降低其重量與材料成本的中空前叉 管0 【先前技術】 一般自行車的轉向機構主要包括一前又與一轉向管， 該前又中央形成有一肩部，肩部的兩相對側分別朝同一戈 向彎折形成有一外管’該外管係與自行車之前輪相接，髮 轉向管的一端固接於前又肩部處’另一端設有把手以供摩 乘者控制及操作該轉向機構及前輪之用。 其中，由於該前又（特別是肩部處）一方面需要承受知 面透過車輪施予該前又的衝擊力，另一方面還要承受騎身 者透過把手與轉向管帶動前叉與車輪的轉向力，因此，4 現有之以一體成型方式製作該前叉的技術中，雖然可為] „又的重量而選用輕質材料製作，但仍需成型為實 二兼顧其結構強度’在這樣的情況下，該前又重量备 降低程度實在有限。 型方法卜發Γι灣公告編號第546226號「無縫車架之居 「車_件=W案’以及如台灣證書號數第1298655¾ 何it::::型製法」發明專利案所示，均係_ 本身為-ίΓΛ驟來成型出中空車架管。•，前叉除了 的轉向力作用之下之官體外，在地面的衝擊力以及騎乘者 而上述專料 _ ”構強度還需要特別加強， 所教不之方法僅能成型出管壁厚度一致的中 1378879 並無法製作 空長型管體，以作為組成自行車車架的管材 成型出可供利用之前又。 入，在另一種現有技術 別製作該肩部與二外管，使該肩部呈一具足夠結構強度： 塊體，該外管則呈_中介其辦尨 U中工s體後，再將該三個構件組合而 成别又，以達到減輕該前叉重量的目的；，准，如此一來更 需要對每-前又的各構件個別進行組裝，徒增額外的組裝 步驟及費用’導致生產效率低落。1378879 VI. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a control method for integrating a bicycle into a bicycle and a process thereof, in particular to make a hollow front fork tube 0 which can reduce its weight and material cost. The steering mechanism of a bicycle generally includes a front and a steering tube. The front and the center are formed with a shoulder. The opposite sides of the shoulder are respectively bent toward the same direction to form an outer tube. The outer tube and the bicycle When the front wheels are connected, one end of the steering tube is fixed at the front and the shoulders. The other end is provided with a handle for the rider to control and operate the steering mechanism and the front wheel. Among them, because the front (especially the shoulder) needs to bear the impact of the front surface through the wheel, on the other hand, the rider must carry the front fork and the wheel through the handle and the steering tube. Steering force, therefore, the existing technology for making the front fork in an integrally formed manner, although it can be made of lightweight material for the weight of the „, but still needs to be formed into a real two and take into account its structural strength. Under the circumstance, the degree of reduction in the weight of the front is really limited. Type method Bufa Γι Bay Bulletin No. 546226 "Seamless frame home "Car_piece = W case" and such as Taiwan certificate number 12986553⁄4 Heit: The ::: method of the invention patent case shows that the _ itself is - ΓΛ ΓΛ to form a hollow frame tube. • In addition to the steering force of the front fork, the impact force on the ground and the rider and the above-mentioned special materials need to be specially strengthened. The method taught can only form a uniform wall thickness. In the middle of 1378879, it is not possible to make an empty-length pipe body, which can be used as a pipe frame to form a bicycle frame before being used. In another prior art, the shoulder and the second outer pipe are made so that the shoulder is A sufficient structural strength: the block body, the outer pipe is _ intermediaries, after the U s s body, and then the three components are combined to achieve the purpose of reducing the weight of the fork; In this way, it is even more necessary to individually assemble each of the components before and after, and add additional assembly steps and costs, resulting in low productivity.
如上所述，現有技術之前又的製作方式實有待進一步 改進之處》 【發明内容】 有鑑於前述現有技術的不 體成型自行車前又管的製程， 自行車前叉之重量，同時兼顧 的。 足’本發明提供一種管製一 希藉此製程達到進一步減輕 刖又管肩部之結構強度的目As described above, the prior art production method of the prior art needs further improvement. [Explanation] In view of the foregoing prior art process of inflating the bicycle front tube, the weight of the bicycle front fork, and at the same time. The present invention provides a control for the purpose of further reducing the structural strength of the chin and the shoulder portion.
係令該 進行： 了達到上述的發明目的， 一體成型方式製作中空前 本發明所利用的技術手段 又管的製程依序對一管體 一抽厚薄管步驟’由管體的兩端拉伸該管體，而於管 體中段處形成-肩部離型段，於該肩部離型段與管體兩端 間分別形成一外管離型段； -縮管步驟，由管體外管離型段之外環壁進行壓縮， 以逐漸縮小該外管雛型段的管徑； -前置f管步驟，將該管體之外管離型段由靠近肩部 雛型段的-銜接端處分別相對該肩部雛型段朝同一方向進 行彎折； 一模具成型步驟’將該管體置於一模具中，再 _ 之開口端處灌入高壓流體，使整根管體之肩部 體 味k 1雖型段盥外 官離型段貼合於模具之内壁，從而一體成型為— /、 答_ 巧—中空前又 前述模具成型步驟之後可進一步包含有一管材加工， 騍，其係在該前X管之一肩㈣中央處頂面與底面上分: 貫穿其管壁而形成有相對應的一上結合孔與—下結合孔。 前述縮管步驟與前置彎管步驟間可進一步包含有一壓 型t驟，其由該管體之外管離型段外環壁的兩相對側對該 外管雛型段進行沖壓成型。 本發明的優點在於，在該一體成型製作而成的中空前 又官中’肩部會比外管具有更高的結構強冑，以承受地面 透=車輪施予㈣又管的衝擊力卩及騎乘者透過把手與轉 向e帶動則又管與車輪的轉向力，故可順利達到降低自行 車刖又管之重量，進而減輕騎乘者負擔的目的，同時還可 降低組裝及材料成本。 【實施方式】 _ ，見第一及二圖所示，本發明之管製一體成型自行車 月J叉S的製程係先取一具適當長度且管壁具適當厚度的中 空管體（10)， 一壓型步驟、 加工步驟，其 並依序進行一抽厚薄管步驟、一縮管步驟、 一刖置彎官步驟、一模具成型步驟及一管件 中： 的 配《參見第三圖所示’在抽厚薄管步驟中，係由管體〇 〇) 兩端以抽拉方式延伸拉長該管體（10)，而於管體（10)中 1378879 段處形成一肩部雛型段（11)，於該肩部離型段（11)與管體 (10)兩端間分別形成一外管雛型段（12)，其中由於該外管 雛型段（12)經過拉伸，故外管雛型段（12)的管壁厚度會小 於肩部離型段（11)的管壁厚度； 配合參見第四圖所示，在縮管步驟中，係由管體（10) 外管離型段（12)之外環壁進行壓縮，以逐漸縮小該外管雛 型段（12)的管徑，並使每一外管離型段…）由靠近肩部離 型段（11)的一銜接端（121)到遠離肩部離型段（彳彳）另一開口 • 端（122)間形成管徑漸縮之型態，而具有流線狀的外型，此 時，該外管雜型段（彳2)之管壁厚度會較進行完抽厚薄管步 驟後之管壁厚度略為增厚； 配合參見第五圖所示’在壓型步驟中，係由該管體（1〇) 之外管雛型段（12)外環壁的兩相對側對該外管離型段（12) 進行沖壓成型，使該外管雛型段（12)成型為具擴圓形斷面 之管件； 配合參見第六圖所示，在前置彎管步驟中，係將該管 鲁體⑽之外管雛型段（12)由其銜接端（121)處分別相對該肩 部雛型段（1 1)朝同一方向進行彎折； 配合參見第七及八圖所示，在模具成型步驟中，係將 該管體⑽置於-模具（30)中’再由管體（10)之外管雛型段 (12)的開口端（122)灌入高壓流體（例如：高壓氣體或高壓 液體），使整根管體⑽之肩部雛型段⑴）與外管離型段（12) 貼合於模具之内壁，從而一體成型為一中空前又管㈣）， 並使前述㈣離型段⑴）形成料又管㈤)之肩部（21)，前 述外管離型段（12)則形成該前叉管（2〇)之外管 1378879 配合參見第九圖所示，在管件加工步驟中， τ 你在該前 叉管（20)之肩部（21)的中央處，於頂面與底 - 丄77々’J貝穿 '· 其管壁而形成有相對應的一上結合孔（23)與一下姓人 (24)，以供與—自行車之轉向管相互結合之用。 孔 經由上述各加工步驟所一體成型製成的争空前又管 (2〇)，可使其肩部（21)比外管（22)具有更高的結構強度，= 承受地面透過車輪施予該前又管（2〇)的衝擊力， 者透過把手與轉向管帶動前叉管（2〇)與車輪的轉向力，順 •利達到降低自行車前又管之重量，進而減輕騎乘者負擔的 目的，同時還可降低組裝及材料成本。 【圖式簡單說明】 第一圖為本發明之步驟流程圖。 第二圖為本發明於加工前之側視剖面圖。The order is made to achieve the above-mentioned object of the invention, and the process of the invention is carried out in a one-piece molding process, and the process of the invention is followed by a process of sequentially drawing a thin tube to a tube body. The tube body is formed at the middle portion of the tube body - a shoulder-shaped segment, and an outer tube-shaped segment is formed between the shoulder-shaped segment and the tube body respectively; The outer wall of the section is compressed to gradually reduce the diameter of the outer section of the outer tube; - the step of pre-f tube, the outer section of the tube is separated from the end of the shoulder-shaped section Don't bend in the same direction with respect to the shoulder section; a mold forming step 'put the tube body into a mold, and then fill the open end with high-pressure fluid to make the shoulder of the whole tube body taste Although the k1 type segment is attached to the inner wall of the mold, the integral part is formed into a ——-, a _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The top surface of the front X tube (four) is divided into the top surface and the bottom surface: through the tube It is formed with a coupling hole corresponding to the upper and - the coupling hole. The step of shrinking the tube and the step of pre-bending may further comprise a press-type step, wherein the outer tube is stamped by the opposite sides of the outer ring wall of the outer tube of the tube. The invention has the advantages that the shoulder portion of the hollow body before the integral molding can have a higher structural strength than the outer tube, so as to withstand the ground penetration = the impact of the wheel (4) and the impact of the tube When the rider drives the handle and the steering e, the steering force of the wheel is controlled, so that the weight of the bicycle and the tube can be reduced, thereby reducing the burden on the rider, and the assembly and material costs can be reduced. [Embodiment] _ , see the first and second figures, the process of the integrated one-piece bicycle month J fork S of the present invention is to first take a hollow pipe body (10) of appropriate length and a suitable thickness of the pipe wall, a pressing step, a processing step, and sequentially performing a thick thin tube step, a shrink tube step, a set bending step, a mold forming step, and a tube fitting: "see the third figure" In the step of thinning the thin tube, the tube body (10) is extended by both ends of the tube body 抽), and a shoulder-shaped section is formed at the section 1378879 of the tube body (10) (11) An outer tube forming section (12) is formed between the shoulder separating section (11) and the ends of the pipe body (10), wherein the outer tube forming section (12) is stretched, The wall thickness of the tube draft section (12) will be smaller than the wall thickness of the shoulder section (11); as shown in the fourth figure, in the shrinking step, the tube (10) is separated from the tube. The outer wall of the section (12) is compressed to gradually reduce the diameter of the outer tube section (12), and each outer tube is separated from the section ...) A connecting end (121) of the segment (11) forms a tapered shape between the other opening/end (122) of the segment away from the shoulder segment, and has a streamlined shape. At this time, the wall thickness of the outer tube miscellaneous section (彳2) is slightly thicker than the thickness of the tube wall after the step of thinning the thin tube; as shown in the fifth figure, in the molding step, The tubular body (1〇) is formed by stamping the outer tube release section (12) on opposite sides of the outer ring wall of the outer tube section (12), so that the outer tube section (12) is formed into a Expanding the pipe section of the circular section; as shown in the sixth figure, in the pre-bending step, the pipe-shaped section (12) of the pipe body (10) is respectively opposite from the joint end (121) The shoulder section (1 1) is bent in the same direction; as shown in the seventh and eighth figures, in the mold forming step, the tube body (10) is placed in the mold (30) The open end (122) of the outer tube section (12) of the tube body (10) is filled with a high-pressure fluid (for example, a high-pressure gas or a high-pressure liquid) so that the shoulder portion (1) of the whole tube body (10) is externally tube The section (12) is attached to the inner wall of the mold so as to be integrally formed into a hollow front tube (four)), and the aforementioned (four) release section (1) is formed into a material (tube) (5) shoulder (21), the outer tube is separated The section (12) forms the front fork tube (2〇) and the tube 1378879. See the ninth figure. In the tube processing step, τ is on the shoulder (21) of the front fork tube (20). At the center, on the top and bottom - 丄 77々 'J shell wear '· its wall is formed with a corresponding upper binding hole (23) and the next surname (24) for the steering wheel of the bicycle Use in combination with each other. The hole (2〇) before the hole is integrally formed by the above various processing steps, the shoulder portion (21) has a higher structural strength than the outer tube (22), and the ground is applied to the wheel through the wheel. In front of the tube (2 〇) impact force, through the handle and the steering tube to drive the front fork tube (2 〇) and the steering force of the wheel, Shun Lee to reduce the weight of the bicycle before the tube, thereby reducing the burden on the rider Purpose, while reducing assembly and material costs. BRIEF DESCRIPTION OF THE DRAWINGS The first figure is a flow chart of the steps of the present invention. The second figure is a side cross-sectional view of the invention prior to processing.
第三圖為本發明於進行抽厚薄管步驟後之側視剖面 圖。 J 第四圖為本發明於進型縮管步驟後之側視剖面圖。 第五圖為本發明於進行壓型步驟後之側視圖。 • 第六圖為本發明於進行前置彎管步驟後之側視圖。 第七圖為本發明於進行模具成型步驟時之側視圖。 第人圖為本發明於進行才莫具成型步驟後之立體外觀 圖。 第九目冑本發明於進行管件加工步驟後之立體外觀 【主要元件符號說明】 1378879 (10)管體 (12)外管雛型段 (122)開口端 (21)肩部 (23)上結合孔 (30)模具 (11)肩部雛型段 (121)銜接端 (20)前又管 (22)外管 (24)下結合孔The third figure is a side cross-sectional view of the present invention after the step of drawing thick and thin tubes. J is a side cross-sectional view of the present invention after the step of shrinking the tube. The fifth figure is a side view of the present invention after the molding step. • Figure 6 is a side view of the invention after the pre-bending step. Figure 7 is a side elevational view of the present invention as it is subjected to a mold forming step. The first figure is a three-dimensional appearance of the invention after the molding step. The ninth item is the three-dimensional appearance of the present invention after the pipe processing step [main component symbol description] 1378879 (10) pipe body (12) outer pipe prototype section (122) open end (21) shoulder (23) combined Hole (30) mold (11) shoulder section (121) joint end (20) front tube (22) outer tube (24) lower joint hole