JPH0747277Y2 - Front hawk for bicycles - Google Patents
Front hawk for bicyclesInfo
- Publication number
- JPH0747277Y2 JPH0747277Y2 JP1988040381U JP4038188U JPH0747277Y2 JP H0747277 Y2 JPH0747277 Y2 JP H0747277Y2 JP 1988040381 U JP1988040381 U JP 1988040381U JP 4038188 U JP4038188 U JP 4038188U JP H0747277 Y2 JPH0747277 Y2 JP H0747277Y2
- Authority
- JP
- Japan
- Prior art keywords
- hawk
- hawk stem
- stem
- taper
- adhesive
- 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
- 239000000853 adhesive Substances 0.000 claims description 37
- 230000001070 adhesive effect Effects 0.000 claims description 35
- 239000012790 adhesive layer Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
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 この考案は自転車用前ホーク、特にそのホーク肩部とホ
ークステム部との接着構造に関する。DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a front hawk for a bicycle, and more particularly to a bonding structure between a shoulder portion of the hawk and a hawk stem portion.
従来の技術 近年、アルミニウム等の軽合金製、あるいはグラスフア
イバー、カーボンフアイバー等のプラスチック製の超軽
量、高強度の自転車フレームの需要がさかんである。と
ころが、従来の鉄製パイプと異なりロー付け、すなわち
熱溶着することができなく、接着には高分子系接着剤が
用いられ、例えば実公昭63−1667号公報に記載されるよ
うに、ホーク型の上部中央に上方へ筒状のホークステム
取付用部を形成し、その外径は上部がホークステムの外
径とほぼ同一で、下部ほど大径となる逆テーパーに形成
すると共に、内部を下部ほど小径となるテーパー孔に形
成し、そしてこれに差入れ接着固定するホークステム
を、下方寄りを前記取付用部のテーパー孔に係合可能な
テーパー部に、スエージングにより下部ほど肉厚に形成
し、接着部材の構造が強度的に強化されるものがある。
そして対応連接面間には接着剤が塗布され介在するもの
である。2. Description of the Related Art In recent years, there is a strong demand for ultra-light and high-strength bicycle frames made of light alloy such as aluminum or plastic such as glass fiber and carbon fiber. However, unlike conventional iron pipes, brazing, that is, they cannot be heat-welded, and a polymer adhesive is used for adhesion. For example, as described in Japanese Utility Model Publication No. 63-1667, a hawk type A cylindrical hawk stem mounting part is formed upward in the center of the upper part, the outer diameter of which is approximately the same as the outer diameter of the hawk stem, and the lower part is formed in a reverse taper with the larger diameter, and the inner part is Formed in a taper hole with a small diameter, and insert and adhere to this hawk stem, a taper part that can engage with the taper hole of the mounting part on the lower side, and is formed thicker toward the bottom by swaging, There is one in which the structure of the adhesive member is strengthened in strength.
An adhesive is applied and intervenes between the corresponding connecting surfaces.
考案が解決しようとする課題 前記接着面を相互に一定の間隔で対応させ、その間に均
一な接着層を構成するには特別に設計された治具と特別
な管理を必要とし、製造コストが高く、また、その治具
のため、接着剤の熱硬化工程に余分の熱量を消費し、不
経済である。また、研究の結果、前記の如く、部材間に
均一な接着層を構成すると、その強度は部材の接着面に
対して垂直方向に作用する垂直荷重及び振動その他によ
るくりかえし荷重に、著るしく弱いものであることがわ
かった。Problems to be Solved by the Invention In order to make the adhesive surfaces correspond to each other at a constant interval and to form a uniform adhesive layer between them, a specially designed jig and special management are required, resulting in high manufacturing cost. Also, because of the jig, extra heat is consumed in the thermosetting process of the adhesive, which is uneconomical. Further, as a result of the research, when a uniform adhesive layer is formed between the members as described above, the strength thereof is significantly weak against the vertical load acting in the direction perpendicular to the bonding surface of the member and the repeated load due to vibration and the like. It turned out to be a thing.
課題を解決するための手段 ホーク肩部とホークステム部とを接着剤により固着する
自転車用前ホークにおいて、ホーク肩部およびその上面
に突設した接続補助筒に貫通して設けるホークステム接
続孔を、下端を小径とする所要のテーパーの内径面に設
けると共に、その内径面には所要の間隔で軸方向に接着
溝を、複数個所に下端の巾を狭く設け、このホークステ
ム接続孔に嵌入するホークステム部の嵌入部を、ホーク
ステム部の他部より小径であって、先端を最小径とする
前記ホークステム接続孔に適合した所要のテーパー径に
形成し、かつ前記接続補助筒のホークステム接続孔の口
端内径面にそのホークステム接続孔のテーパーより大き
い角度のテーパー座グリを設け、前記ホークステム部の
嵌入部の上方外径に前記テーパー座グリに適合して密接
するテーパー連接部を設け、このホークステム部のテー
パー連接部を肩部の接続補助筒のテーパー座グリに突合
連接してホークステム部の嵌入部を肩部および接続補助
筒のホークステム接続孔に圧入固着すると共に、夫々の
接着溝に充填される接着剤で対面する肩部および接続補
助筒とホークステム部を固着したことを特徴とする自転
車用前ホークにある。Means for Solving the Problems In a front hawk for a bicycle in which a hawk shoulder portion and a hawk stem portion are fixed by an adhesive, a hawk stem connecting hole provided through the hawk shoulder portion and a connecting auxiliary cylinder protruding from the upper surface thereof is provided. , The lower end is provided on the inner diameter surface of the required taper with a small diameter, and the inner diameter surface is provided with adhesive grooves in the axial direction at the required intervals, and the width of the lower end is narrowed at a plurality of places to fit into this hawk stem connection hole. The fitting portion of the hawk stem portion is formed to have a smaller diameter than the other portions of the hawk stem portion, and has a required taper diameter adapted to the hawk stem connection hole having the minimum diameter at the tip, and the hawk stem of the connection auxiliary cylinder. A tapered counterbore with an angle larger than the taper of the hawk stem connection hole is provided on the inner diameter surface of the connection hole, and the taper counterbore is adapted to the upper outer diameter of the fitting portion of the hawk stem part. The hawk stem of the hawk stem of the shoulder and connection auxiliary cylinder is butt connected to the taper counterbore of the connecting auxiliary cylinder of the shoulder by butt-connecting the taper connecting portion of the hawk stem. A front hawk for a bicycle characterized in that it is press-fitted and fixed in a connection hole, and a shoulder portion, a connection auxiliary cylinder, and a hawk stem portion facing each other are fixed by an adhesive agent filled in each bonding groove.
作用 この考案前ホークは、肩部および接続補助筒とホークス
テム部と固着が、ホーク肩部および接続補助筒のホーク
ステム接続孔に対してホークステム部の嵌入部を圧入固
着するものであると共に、ホーク肩部のホークステム接
続孔には軸方向に接着溝を所要巾で数個所設け、これに
充填される接着剤にて、対面する肩部とホークステム部
を接着するものであるから、製造上において接着剤が硬
化前に両者の軸線が一致し、接着剤が硬化した後は、部
材の連接する部分が垂直荷重および上下の軸方向荷重
を、接着層を介在しないで直接に受けるものである。In this pre-invention hawk, the shoulder portion, the connection auxiliary cylinder, and the hawk stem portion are fixed to each other, and the fitting portion of the hawk stem portion is press-fitted and fixed to the hawk stem connection hole of the hawk shoulder portion and the connection auxiliary cylinder. , The hawk stem connection hole of the hawk shoulder portion is provided with several adhesive grooves in the axial direction with a required width, and the adhesive that fills this groove bonds the facing shoulder portion and the hawk stem portion. In the manufacturing process, the axes of both are aligned before the adhesive is cured, and after the adhesive is cured, the connecting parts of the members directly receive vertical load and vertical load in the vertical direction without interposing an adhesive layer. Is.
また肩部の接続補助筒のホークステム接続孔の口端のテ
ーパー座グリと、それに適合するホークステム部のテー
パー連接部とが突合密接することによって、テーパー圧
入を一定にコントロールすることができ、またホークス
テム接続孔の口端を封止して接着剤が外方へ流れ出すこ
とを防止する。Also, the taper press fit at the mouth end of the hawk stem connection hole of the shoulder connection auxiliary cylinder and the taper connecting part of the hawk stem part that fits it can be controlled to a constant taper press fit, Also, the mouth end of the hawk stem connection hole is sealed to prevent the adhesive from flowing out.
実施例 この考案の実施例を説明すると、１は前ホーク用のホー
ク肩部であり、その上面には接続補助筒1aが所要高さ一
体に突設され、該接続補助筒1aおよびホーク肩部の中心
にホークステム接続孔２が、下端を小径とする所要のテ
ーパーに貫通して設けられると共に、その内径面には所
要の間隔で接着溝３が、実施例の図面に示すように例え
ば、８個所に下端の巾が狭く設けられ、その結果、内径
面は突条４の先端に、下端の巾が広く、かつ下端を小径
とする所要のテーパーに構成される。Embodiment An embodiment of the present invention will be described. Reference numeral 1 is a hawk shoulder portion for a front hawk, and a connection auxiliary cylinder 1a is provided on the upper surface thereof so as to integrally project at a required height, and the connection auxiliary cylinder 1a and the hawk shoulder portion are provided. A hawk stem connection hole 2 is provided at the center of the hole so as to penetrate a required taper having a small diameter at its lower end, and adhesive grooves 3 are formed on the inner diameter surface at a required interval, as shown in the drawings of the embodiment. The width of the lower end is narrowly provided at eight places, and as a result, the inner diameter surface is formed at the tip of the ridge 4 in a required taper having a wide width at the lower end and a small diameter at the lower end.
接続補助筒1a上端のホークステム接続孔２の口端はホー
クステム接続孔２のテーパーより大きい角度のテーパー
座グリ８が、例えば削設により形成されて設けられる。The mouth end of the hawk stem connection hole 2 at the upper end of the connection auxiliary cylinder 1a is provided with a tapered counterbore 8 having an angle larger than the taper of the hawk stem connection hole 2 by, for example, cutting.
５はホークステム部で、その下部所要長が、前記ホーク
肩部のホークステム接続孔２に適合して圧入する嵌入部
６に縮径されてテーパーに設けられる。このホークステ
ム部の嵌入部６の上方は、ホークステム部５の外径にテ
ーパー連接部７を介して接続するように設けられ、ホー
クステム部５のテーパー連接部７は、前記接続補助筒1a
上端の上面に開口するホークステム接続孔２の口端に設
けられたテーパー座グリ８と適合し、これと密接に連接
する。Reference numeral 5 denotes a hawk stem portion, the lower required length of which is reduced in diameter to a fitting portion 6 which is fitted into the hawk stem connecting hole 2 of the hawk shoulder portion and press-fitted to be tapered. The upper part of the fitting portion 6 of the hawk stem portion is provided so as to be connected to the outer diameter of the hawk stem portion 5 via the taper connecting portion 7, and the taper connecting portion 7 of the hawk stem portion 5 is connected to the connection auxiliary cylinder 1a.
It conforms to the taper counterbore 8 provided at the mouth end of the hawk stem connection hole 2 opening on the upper surface of the upper end, and is closely connected to this.
前記ホーク肩部のホークステム接続孔２とホークステム
部の嵌入部のテーパーは、実施例では垂線に対して１度
30分であり、突条４の巾テーパーは両巾で２度である。The taper of the hawk stem connecting hole 2 of the hawk shoulder portion and the fitting portion of the hawk stem portion is once with respect to the vertical line in the embodiment.
It is 30 minutes, and the width taper of the ridge 4 is 2 degrees in both widths.
９はホーク足10の接続子、11はホーク肩部１とホークス
テム部５とを接着する接着剤である。12はブレーキセン
ター取付軸の嵌挿孔で、接着工程完了後に穿設される。Reference numeral 9 is a connector of the hawk foot 10, and 11 is an adhesive for bonding the hawk shoulder portion 1 and the hawk stem portion 5. Reference numeral 12 is a fitting insertion hole for the brake center mounting shaft, which is formed after the bonding process is completed.
尚また、前記説明で接着溝３と記載したが、接着剤11の
厚みは接着強度を得るために重要であるので、肩部のス
テム接着孔２の内径面を溝底とし、ホークステム部５の
嵌入部６の外径に圧接する部分を、特に突条（リブ）４
とし、この突条４を所要の間隔で、同じく巾および高さ
にテーパーをつけて立設すると記載しても全く同じであ
る。Although the adhesive groove 3 is described in the above description, since the thickness of the adhesive 11 is important for obtaining the adhesive strength, the inner diameter surface of the stem adhesive hole 2 of the shoulder portion is used as the groove bottom, and the hawk stem portion 5 is used. The portion of the fitting portion 6 that is pressed against the outer diameter of
It is exactly the same even if it is described that the ridges 4 are erected at the required intervals with the width and height similarly tapered.
効果 この考案はホークステム部のテーパー嵌入部に対し、ホ
ークステム接続孔をテーパーに、かつ小径となしている
から、ホークステム部は、接続補助筒を含むホーク肩部
に圧入することになり、両部材は圧接強度によって固着
している。また両部材は、溝内に充填され、肉厚の均一
な接着層で固着されるので、十分な接着強度を常に確保
することができる。Effect In this invention, the hawk stem connecting hole is tapered and has a small diameter with respect to the tapered fitting portion of the hawk stem portion, so the hawk stem portion is press-fitted into the hawk shoulder portion including the connection auxiliary cylinder, Both members are fixed by the pressure contact strength. Further, since both members are filled in the groove and fixed by the adhesive layer having a uniform thickness, it is possible to always secure sufficient adhesive strength.
また、両部材の横方向すなわち接着面に対する垂直荷重
及び振動その他によるくりかえし荷重は、接着層を介在
させることなく直接に受けるから、接着層を破壊させる
ことなく、長時間にわたり接着強度を損うことなく維持
させるものである。In addition, the lateral load of both members, that is, the vertical load to the adhesive surface and the repeated load due to vibration and the like, are directly received without interposing the adhesive layer, so that the adhesive strength is not damaged for a long time without destroying the adhesive layer. It is something that is maintained.
また接着層は溝内に区画されるから、接着剤の軸回り応
力に対する接着強度が一般の均一全面接着層に比較して
増大し、部材を強固に固着させるものである。Further, since the adhesive layer is divided into the grooves, the adhesive strength against the axial stress of the adhesive is increased as compared with the general uniform whole surface adhesive layer, and the member is firmly fixed.
また接続補助筒およびホーク肩部のホークステム接続孔
の内面には、突条が圧入方向に設けられているため、圧
入時に、ホーク肩部とホークステム部との軸が一致した
状態にそのままで保持され、接着剤が未硬化の状態にあ
っても、ホーク肩部とホークステム部との軸にズレが全
く生じなく、また接着剤が熱硬化性で、組立てた部品を
熱硬化室に入れる場合においても、部材は圧入されてい
るため十分な固定力をもっており、治具は最小限のもの
で足り、かさばらず熱硬化室に一度に沢山いれることが
でき、また部材および治具を加熱するための熱エネルギ
ーが少なくてすみ、熱エネルギーの省力化を図り効率を
あげることができるのである。In addition, since the projections are provided in the press-fitting direction on the inner surface of the connection auxiliary cylinder and the hawk stem connection hole of the hawk shoulder, the shaft of the hawk shoulder and the hawk stem remain in the same state during press fitting. Even if the adhesive is held and the adhesive is uncured, the shaft of the hawk shoulder and the hawk stem will not be displaced at all, and the adhesive is thermosetting, so the assembled parts can be put in the thermosetting chamber. Even in the case, since the members are press-fitted, they have sufficient fixing force, the jigs are minimal, and they can be placed in the thermosetting chamber at a time without being bulky and heat the members and jigs. It requires less heat energy to save heat energy, and can improve efficiency.
特に、接続補助筒のホークステム接続孔の上面側口端の
テーパー座グリと、それに適合するホークステム部のテ
ーパー連接部とが密接することによって、テーパー圧入
を一定にコントロールすることができるばかりでなく、
接着剤が外方へ流れ出して付着するのを防止し、その作
業性を良くし、美麗な前ホーク製造に効果がある。In particular, the taper press fit on the upper surface side mouth end of the hawk stem connection hole of the connection auxiliary cylinder and the taper connecting portion of the hawk stem part that fits with it can be controlled not only to be constant. Without
It prevents the adhesive from flowing out and adhering to the outside, improving its workability, and is effective in producing a beautiful front hawk.
以上、部材は圧入されて固着されるから、接着面に対す
る垂直荷重に対しての固着強度が改善され、その接着剤
による固着強度を長期にわたり維持するものである。ま
た製造工程、特に接着剤の硬化工程における治具を簡単
化し、テーパー圧入製造作業を容易化して製造コストの
低減に寄与するものである。As described above, since the member is press-fitted and fixed, the fixing strength against a vertical load with respect to the adhesive surface is improved, and the fixing strength by the adhesive is maintained for a long time. Further, the jig in the manufacturing process, particularly in the curing process of the adhesive, is simplified, the taper press-fitting manufacturing work is facilitated, and the manufacturing cost is reduced.
図面はこの考案の実施例を示すものであって、第１図は
一部切欠き接合正面図、第２図は同じくその分解したホ
ーク肩部の一部切欠き正面図、第３図は同じくステム部
の正面図、第４図は第２図Ａ−Ａ線に沿う断面図、第５
図は第２図Ｂ−Ｂ線に沿う断面図、第６図は第１図Ｃ−
Ｃ線に沿う断面図である。 １……ホーク肩部、1a……接続補助筒、２……ホークス
テム接続孔、３……接着溝、４……突条、５……ホーク
ステム部、６……嵌入部、７……テーパー連接部、８…
…テーパー座グリ、９……接続子、10……ホーク足、11
……接着剤。The drawings show an embodiment of the present invention. Fig. 1 is a partially cutaway front view of the joint, Fig. 2 is a partially cutaway front view of the disassembled hawk shoulder, and Fig. 3 is the same. FIG. 4 is a front view of the stem portion, FIG. 4 is a sectional view taken along line AA of FIG.
The drawing is a sectional view taken along the line BB in FIG. 2, and FIG. 6 is the sectional view in FIG.
It is sectional drawing which follows the C line. 1 ... Hawk shoulder, 1a ... Connection auxiliary cylinder, 2 ... Hawk stem connection hole, 3 ... Adhesive groove, 4 ... Ridge, 5 ... Hawk stem part, 6 ... Fitting part, 7 ... Taper connecting part, 8 ...
… Taper spot facing, 9 …… Connector, 10 …… Hawk foot, 11
……adhesive.
Claims (1)
より固着する自転車用前ホークにおいて、ホーク肩部お
よびその上面に突設した接続補助筒に貫通して設けるホ
ークステム接続孔を、下端を小径とする所要のテーパー
の内径面に設けると共に、その内径面には所要の間隔で
軸方向に接着溝を、複数個所に下端の巾を狭く設け、こ
のホークステム接続孔に嵌入するホークステム部の嵌入
部を、ホークステム部の他部より小径であって、先端を
最小径とする前記ホークステム接続孔に適合した所要の
テーパー径に形成し、かつ前記接続補助筒のホークステ
ム接続孔の口端内径面にそのホークステム接続孔のテー
パーより大きい角度のテーパー座グリを設け、前記ホー
クステム部の嵌入部の上方外径に前記テーパー座グリに
適合して密接するテーパー連接部を設け、このホークス
テム部のテーパー連接部を肩部の接続補助筒のテーパー
座グリに突合連接してホークステム部の嵌入部を肩部お
よび接続補助筒のホークステム接続孔に圧入固着すると
共に、夫々の接着溝に充填される接着剤で対面する肩部
および接続補助筒とホークステム部を固着したことを特
徴とする自転車用前ホーク。1. A front hawk for a bicycle in which a hawk shoulder portion and a hawk stem portion are fixed to each other by an adhesive agent, and a hawk stem connecting hole provided through the hawk shoulder portion and a connecting auxiliary cylinder projecting on the upper surface thereof is provided at a lower end. Is provided on the inner diameter surface of the required taper with a small diameter, the inner diameter surface is provided with adhesive grooves in the axial direction at the required intervals, and the width of the lower end is narrowed at a plurality of locations, and the hawk stem is fitted into this hawk stem connection hole. The fitting portion of the portion is formed to have a smaller taper diameter than the other portion of the hawk stem portion, and has a required taper diameter adapted to the hawk stem connection hole having the minimum diameter at the tip, and the hawk stem connection hole of the connection auxiliary cylinder. A taper seat counterbore having an angle larger than the taper of the hawk stem connection hole is provided on the inner diameter surface of the mouth end of the, and the upper outer diameter of the fitting portion of the hawk stem part is fitted and closely fitted to the taper counterbore. A tapered connecting part of the hawk stem is butt-connected to the tapered counterbore of the connecting auxiliary cylinder of the shoulder to press the fitting part of the hawk stem into the hawk stem connecting hole of the shoulder and auxiliary connecting cylinder. A front hawk for a bicycle, characterized in that, in addition to being fixed, a shoulder portion, a connecting auxiliary cylinder, and a hawk stem portion facing each other are fixed by an adhesive filled in each adhesive groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988040381U JPH0747277Y2 (en) | 1988-03-29 | 1988-03-29 | Front hawk for bicycles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988040381U JPH0747277Y2 (en) | 1988-03-29 | 1988-03-29 | Front hawk for bicycles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01144292U JPH01144292U (en) | 1989-10-03 |
| JPH0747277Y2 true JPH0747277Y2 (en) | 1995-11-01 |
Family
ID=31266854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988040381U Expired - Lifetime JPH0747277Y2 (en) | 1988-03-29 | 1988-03-29 | Front hawk for bicycles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0747277Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014105049A1 (en) * | 2014-04-09 | 2015-10-15 | Dt Swiss Ag | Fork component for an at least partially muscle-operated bicycle |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS626188U (en) * | 1985-06-28 | 1987-01-14 | ||
| JPS6228694U (en) * | 1985-08-07 | 1987-02-21 | ||
| JPH0632477Y2 (en) * | 1986-05-24 | 1994-08-24 | 宮田工業株式会社 | Adhesive joining device between the front shoulder of the bicycle and the fork stem |
-
1988
- 1988-03-29 JP JP1988040381U patent/JPH0747277Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01144292U (en) | 1989-10-03 |
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