JPH0635891Y2 - Integrated front fork with reinforced sleeve - Google Patents
Integrated front fork with reinforced sleeveInfo
- Publication number
- JPH0635891Y2 JPH0635891Y2 JP4304786U JP4304786U JPH0635891Y2 JP H0635891 Y2 JPH0635891 Y2 JP H0635891Y2 JP 4304786 U JP4304786 U JP 4304786U JP 4304786 U JP4304786 U JP 4304786U JP H0635891 Y2 JPH0635891 Y2 JP H0635891Y2
- Authority
- JP
- Japan
- Prior art keywords
- front fork
- sleeve
- elastic body
- shoulder portion
- integrated front
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Steering Devices For Bicycles And Motorcycles (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は強化スリーブを設けた一体型前フォーク材に関
する。DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to an integrated front fork material provided with a reinforcing sleeve.
従来の技術 一体型前フォークとは一方の管材において中央部に肩部
を設け、その両端から管材を同一平面上において同一方
向に折曲げて、2本のさや即ち脚を作るという方法で、
自転車の前フォークを成形するものである。BACKGROUND ART Integral front fork is a method in which a shoulder is provided at the center of one pipe material, and the pipe material is bent in the same direction on the same plane from both ends to form two sheaths, that is, legs.
The front fork of the bicycle is molded.
かかる前フォークの製造法としては既に「前フォーク単
一材の油圧バルジ成形法」(特公昭58−933号公報)が
開示されている。As a method of manufacturing such a front fork, "a hydraulic bulge forming method for a single material of the front fork" (Japanese Patent Publication No. 58-933) has been disclosed.
考案が解決しようとする課題 本考案はフォークの肩部の強度に優れたクラウンレス一
体型フォーク材を提供するものである。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention provides a crownless integrated fork material having excellent strength of the shoulder portion of the fork.
課題を解決するための手段 所定の管材中央部に自転車前フォークの肩部を設定し該
肩部両端を同一平面上において同一方向に屈曲して成る
一体型前フォークの該肩部中央に貫通穿孔4を設けて円
筒スリーブ2を嵌合し、円筒スリーブに中実弾性体1を
密着挿入してバルジ成形することにより、鼓胴6−1,6
−2を一体型前フォークの肩部内に膨出密着して強化ス
リーブ2aを成形したことを特徴とする強化スリーブを設
けた一体型前フォーク材である。Means for Solving the Problems A shoulder portion of a bicycle front fork is set at a predetermined central portion of a pipe material, and both ends of the shoulder portion are bent in the same direction on the same plane. 4, the cylindrical sleeve 2 is fitted, the solid elastic body 1 is closely inserted into the cylindrical sleeve, and bulge molding is performed.
2 is bulged and closely attached to the shoulder portion of the integrated front fork to form the reinforced sleeve 2a, which is an integrated front fork material provided with a reinforced sleeve.
作用 本考案は一体型前フォークの肩部中央に貫通穿孔を設
け、円筒スリーブを嵌合して中実弾性体を密着挿入して
バルジ成形することによる、鼓胴6−1,6−2を、円筒
スリーブと前フォーク材の肩部内に膨出成形した強化ス
リーブ2aを貫通穿孔4に定置したので、フォーク肩部の
強度に優れたクラウンレスフォーク材を得ることができ
る。Function The present invention provides the drum drums 6-1 and 6-2 by piercing the through hole at the center of the shoulder of the integrated front fork, fitting the cylindrical sleeve, and closely inserting the solid elastic body to form the bulge. Since the cylindrical sleeve and the reinforced sleeve 2a formed by bulging in the shoulder portion of the front fork material are placed in the through hole 4, the crownless fork material having excellent strength of the fork shoulder portion can be obtained.
実施例 第1図は前フォーク肩部の外観を示し、その肩部中央部
に貫通する穿孔4に密着挿入できる円筒状スリーブ2
が、更にスリーブ2の中に密着して挿入する円筒状弾性
体1があり、この弾性体1は中実である。EXAMPLE FIG. 1 shows the appearance of a shoulder portion of a front fork, and a cylindrical sleeve 2 which can be closely inserted into a hole 4 which penetrates the shoulder central portion.
However, there is a cylindrical elastic body 1 which is inserted into the sleeve 2 in close contact therewith, and this elastic body 1 is solid.
第2図は一体型前フォーク3の縦断面を示し、肩部中央
穿孔に挿入されている円筒状スリーブ2はその側壁のみ
が示され、中実円筒状弾性体1がスリーブ2内に設置さ
れていることが図示されている。FIG. 2 shows a longitudinal section of an integrated front fork 3 in which the cylindrical sleeve 2 inserted into the central bore of the shoulder is shown only on its side wall, and the solid cylindrical elastic body 1 is installed in the sleeve 2. Is shown.
第3図は中実円筒状弾性体1は上方に押圧具4aが設置さ
れ、下方には弾性体1を支持すると同時に上方に向って
押上げる押上器具5が設置されていることを示す。FIG. 3 shows that the solid cylindrical elastic body 1 is provided with a pressing tool 4a on the upper side, and a lowering device 5 is installed on the lower side to support the elastic body 1 and simultaneously push up the elastic body 1 upward.
第3図に示す押圧具4aと押上具5との具体的機械につい
ては公知の機械器具が利用できる。As a concrete machine for the pressing tool 4a and the lifting tool 5 shown in FIG. 3, known mechanical devices can be used.
自転車部品製造業界においては、自転車ペダルを支承す
るハンガー・ラグは、管材に対し弾性体を挿入し、この
弾性体に押圧力を加えて成形する方法によって生産され
ていることは公知であり、本考案の管材であるスリーブ
からゴム・バルジ成形法によって、第3図の鼓胴6を有
する強化スリーブ2aが得られるものである。In the bicycle parts manufacturing industry, it is well known that the hanger / lug supporting the bicycle pedal is produced by a method in which an elastic body is inserted into a pipe material and a pressing force is applied to the elastic body to form the elastic body. The reinforced sleeve 2a having the drum drum 6 shown in FIG. 3 is obtained by the rubber bulge molding method from the sleeve which is the devised pipe material.
而して所要の鼓胴6を有するスリーブ2aが成形されたな
らば、上方の押圧具4aを弾性体1より引き離すと同時に
下方の支持兼押上具5からも解除し、強化スリーブ2aは
前フォーク肩部貫通穿孔内に定置する。定置法としては
溶接・半田付・ろう接等を利用する。When the sleeve 2a having the required drum 6 is formed, the upper pressing tool 4a is separated from the elastic body 1 and simultaneously released from the lower supporting and lifting tool 5, so that the reinforced sleeve 2a becomes the front fork. Place in the shoulder through hole. Welding, soldering, brazing, etc. are used as the stationary method.
肩部にクラウンと称する鋳造部品のない即ちクラウンレ
ス一体型前フォーク材は、その肩部の強度に若干の不安
があるものと考えられ、クラウンに対抗する強化法が色
々と提案されている。It is considered that there is some concern about the strength of the shoulder of the front fork material without a cast part called a crown on the shoulder, that is, the strength of the shoulder is somewhat unclear, and various strengthening methods against the crown have been proposed.
本考案で扱う一体型前フォークの材質は特に言及しなか
ったが、その一体型前フォーク材をアルミニウム又はア
ルミニウム合金の管材から成形するときは、本考案の強
化スリーブは特に有用である。Although the material of the integrated front fork used in the present invention is not particularly mentioned, the reinforcing sleeve of the present invention is particularly useful when the integrated front fork material is molded from aluminum or aluminum alloy pipe material.
考案の効果 自転車の車体を軽量且つ美麗ならしめるために、アルミ
ニウム金属パイプが採用されつつあり、本考案はクラウ
ンレスフォーク材の肩部の強化に有効である。Effect of the Invention Aluminum metal pipes are being adopted in order to make the bicycle body light and beautiful, and the present invention is effective for strengthening the shoulder portion of the crownless fork material.
第1図は中実弾性体1、スリーブ2、一体型前フォーク
3の肩部中央穿孔4との位置関係を示す分解図、第2図
は穿孔内に設置されたスリーブ2とその内部に嵌合せる
中実弾性体1を示す断面図であり、第3図は中実弾性体
によってスリーブ2が鼓胴6を成形せる説明図を示す。 1…中実弾性体、2…円筒状スリーブ 2a…強化スリーブ、3…一体型前フォーク 4…貫通穿孔、4a…上方押圧具 5…支持兼押上具、6…鼓胴FIG. 1 is an exploded view showing a positional relationship among a solid elastic body 1, a sleeve 2, and a shoulder central hole 4 of an integrated front fork 3, and FIG. 2 is a sleeve 2 installed in the hole and the inside thereof. It is sectional drawing which shows the solid elastic body 1 which can be combined, and FIG. 3 shows explanatory drawing which the sleeve 2 shapes the drum 6 with a solid elastic body. DESCRIPTION OF SYMBOLS 1 ... Solid elastic body, 2 ... Cylindrical sleeve 2a ... Reinforcement sleeve, 3 ... Integral front fork 4 ... Penetrating hole, 4a ... Upward pressing tool 5 ... Supporting and pushing up tool, 6 ... Drum
Claims (1)
部を設定し、該肩部両端を同一平面上において同一方向
に屈曲して成る一体型前フォークの該肩部中央に貫通穿
孔4を設けて円筒スリーブ2を嵌合し、円筒スリーブに
中実弾性体1を密着挿入してバルジ成形することによ
り、鼓胴6−1,6−2を一体型前フォークの肩部内に膨
出密着して強化スリーブ2aを成形したことを特徴とする
強化スリーブを設けた一体型前フォーク材。1. An integral front fork formed by setting a shoulder portion of a bicycle front fork at a predetermined central portion of a pipe and bending both ends of the shoulder portion in the same direction on the same plane. Is fitted to the cylindrical sleeve 2, the solid elastic body 1 is closely inserted into the cylindrical sleeve, and bulge molding is performed to bulge the drum drums 6-1 and 6-2 into the shoulder portion of the integrated front fork. An integrated front fork material provided with a reinforcing sleeve, which is characterized in that the reinforcing sleeve 2a is closely formed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4304786U JPH0635891Y2 (en) | 1986-03-26 | 1986-03-26 | Integrated front fork with reinforced sleeve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4304786U JPH0635891Y2 (en) | 1986-03-26 | 1986-03-26 | Integrated front fork with reinforced sleeve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62155081U JPS62155081U (en) | 1987-10-01 |
JPH0635891Y2 true JPH0635891Y2 (en) | 1994-09-21 |
Family
ID=30859539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4304786U Expired - Lifetime JPH0635891Y2 (en) | 1986-03-26 | 1986-03-26 | Integrated front fork with reinforced sleeve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0635891Y2 (en) |
-
1986
- 1986-03-26 JP JP4304786U patent/JPH0635891Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS62155081U (en) | 1987-10-01 |
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