JP2577889B2 - Manufacturing method of watch winding stem - Google Patents
Manufacturing method of watch winding stemInfo
- Publication number
- JP2577889B2 JP2577889B2 JP61171998A JP17199886A JP2577889B2 JP 2577889 B2 JP2577889 B2 JP 2577889B2 JP 61171998 A JP61171998 A JP 61171998A JP 17199886 A JP17199886 A JP 17199886A JP 2577889 B2 JP2577889 B2 JP 2577889B2
- Authority
- JP
- Japan
- Prior art keywords
- winding stem
- crown
- manufacturing
- mold
- winding
- 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
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
- G04B3/04—Rigidly-mounted keys, knobs or crowns
- G04B3/041—Construction of crowns for rotating movement; connection with the winding stem; winding stems
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
- G04B3/04—Rigidly-mounted keys, knobs or crowns
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、腕時計用巻真に関するものである。Description: TECHNICAL FIELD The present invention relates to a watch winding stem.
（従来技術） 巻真は、腕時計を構成する１部品であり、第３図に示
すように、竜頭部１と巻真部２とにより成り立ってい
る。従来この種の巻真は、各々別工程にて製造された金
属からなる竜頭部１と巻真部２を、後工程にて接着・圧
入・ネジ込み等の方式により接合していた。(Prior Art) A winding stem is one component of a wristwatch, and is composed of a crown 1 and a winding stem 2 as shown in FIG. Conventionally, in this type of winding stem, a crown 1 and a winding stem 2 made of metal, which are manufactured in different processes, are joined by a method such as bonding, press-fitting, and screwing in a later process.
（発明が解決しようとする問題点） 上記従来技術においては、竜頭部１と巻真部２とを接
合することにより一体化していたので、この接合工程に
手間がかかり、必然的にコストの高いものとなってい
た。また、竜頭部１と巻真部２は、これらの径よりも大
きい金属棒に切削加工等を施すことにより製造されてい
たため、材料コストを高くなるという問題点があった。(Problems to be Solved by the Invention) In the above-mentioned prior art, since the crown 1 and the winding stem 2 are integrated by joining, the joining process is troublesome and inevitably costs high. Had become something. In addition, since the crown 1 and the winding stem 2 are manufactured by performing cutting or the like on a metal rod having a diameter larger than these diameters, there is a problem that the material cost is increased.
この材料コストを引き下げる１つの手段として、竜頭
部１を樹脂成形品に置き換えることが提案されたが、コ
ストの大部分を占める接合工程に変化が無いため、相変
らずコストの高い製品となっていた。As one means for reducing the material cost, it has been proposed to replace the crown 1 with a resin molded product. However, since there is no change in the joining process which accounts for a large part of the cost, the product is still high in cost. Was.
本発明は、上記問題点に鑑みなされたもので、その目
的は、接合工程を削減し、高精度且つ高品質な腕時計用
巻真を製造する方法を提供することにある。The present invention has been made in view of the above problems, and an object of the present invention is to provide a method of manufacturing a high-accuracy and high-quality watch winding stem by reducing a joining step.
（問題点を解決するための手段） 本発明における腕時計用巻真の製造方法は、竜頭部と
巻真部とから構成される腕時計用巻真において、金型の
巻真部先端に対応する部分に溶融樹脂の注入口を設け、
該注入口より金型の巻真部及び竜頭部に対応する部分に
溶融樹脂を充填して竜頭部と巻真部を一体成形すること
を特徴とするものである。(Means for Solving the Problems) The method of manufacturing a watch winding stem according to the present invention is directed to a watch winding stem composed of a crown and a winding stem portion, the portion corresponding to the end of the winding stem portion of the mold. An injection port for molten resin is provided in
A portion corresponding to the winding stem portion and the crown portion of the mold is filled with molten resin from the injection port, and the crown portion and the winding stem portion are integrally formed.
（実施例） 以下図面に基づいて本発明の実施例を説明する。(Example) Hereinafter, an example of the present invention is described based on a drawing.
第１図は本発明の一実施例に係る巻真を示す斜視図で
ある。FIG. 1 is a perspective view showing a winding stem according to one embodiment of the present invention.
３は竜頭部、４は巻真部である。この竜頭部３と巻真
部４は、これらを樹脂で成形する際に一体成形されてい
る。この様に、竜頭部３と巻真部４を一体成形したこと
により、従来必要とされていた接着等の接合工程は不要
となり、また接合による竜頭部３と巻真部４の偏心量の
増大も最小にすることができ、高精度な腕時計用巻真を
得ることが出来る。3 is a crown and 4 is a winding part. The crown 3 and the winding stem 4 are integrally formed when they are formed of resin. As described above, since the crown 3 and the winding stem 4 are integrally formed, a joining process such as bonding, which is conventionally required, becomes unnecessary, and the eccentric amount of the crown 3 and the winding stem 4 due to joining is increased. Can also be minimized, and a highly accurate watch winding stem can be obtained.
第２図は第１図に示す巻真の製造工程を示す図であ
る。FIG. 2 is a view showing a manufacturing process of the winding stem shown in FIG.
５は固定側型板、６は固定側型板５に当接する左右に
開く可動側型板、７は可動側型板６に当接する可動側型
板である。この固定側型板５と可動側型板６、７には、
第１図に示す巻真の形状のキャビティーが形成されてお
り、固定側型板５には巻真部４の先端4a、可動側型板６
には巻真部４の本体4b、可動側型板７には竜頭部３の各
形状のキャビティーが形成されている。また、固定側型
板５には、巻真部４の先端4aに通じる注入口８が設けら
れており、さらに可動側型板７には、押し出しピン９が
差し込まれている。Reference numeral 5 denotes a fixed-side template, 6 denotes a movable-side template that opens to the left and right in contact with the fixed-side template 5, and 7 denotes a movable-side template that contacts the movable-side template 6. The fixed mold plate 5 and the movable mold plates 6 and 7 include:
A cavity in the shape of a winding stem shown in FIG. 1 is formed, and the fixed side mold plate 5 has a tip 4a of the winding stem portion 4, a movable mold plate 6
The cavity of each shape of the crown 3 is formed in the main body 4b of the winding stem portion 4 and the movable mold plate 7. Further, the fixed mold plate 5 is provided with an injection port 8 communicating with the tip 4a of the winding stem portion 4, and the movable mold plate 7 has an extrusion pin 9 inserted therein.
第１図に示す巻真を製造する際には、このような構成
からなる金型に、溶融した樹脂を注入口８よりキヤビテ
ィー内部に充填する。このときに、ギャビティー内には
ガスが充満するため、キャビテイー外にガスを逃すこと
が必要であり、本実施例においては竜頭部３の先端、即
ち押し出しピン９にガス抜き穴10を設けてここからガス
を逃している。充填された樹脂は巻真部４を通過し、竜
頭部３に達するが、巻真部４の製品形状が極端に細いた
め、注入口８と同じくジェット現象により竜頭部３内に
勢い良く注入される。この結果、竜頭部３における充填
不足は勿論、樹脂が硬化する際に発生するヒケも無くな
る。In manufacturing the winding stem shown in FIG. 1, a mold having such a configuration is filled with molten resin from the injection port 8 into the cavity. At this time, since the gas is filled in the cavity, it is necessary to escape the gas to the outside of the cavity. In this embodiment, a gas vent hole 10 is provided in the tip of the crown 3, that is, in the push pin 9. Is missing gas from. The filled resin passes through the winding stem 4 and reaches the crown 3, but since the product shape of the winding stem 4 is extremely thin, the resin is injected into the crown 3 vigorously by the jet phenomenon like the injection port 8. You. As a result, not only the insufficient filling at the crown 3 but also sink marks generated when the resin is cured are eliminated.
また、樹脂は巻真部４の製品形状の細い部分より充填
されるため、ガラス繊維等のフィラーを混入した強化樹
脂で成形する場合においては、巻真部４でフィラーが整
列し易くなり、その結果ベンディング方向に耐力の優れ
た一体成形タイプの腕時計用巻真を得ることができる。In addition, since the resin is filled from the narrow portion of the product shape of the winding stem portion 4, when molding with a reinforced resin mixed with a filler such as glass fiber, the filler is easily aligned in the winding stem portion 4, and As a result, it is possible to obtain an integral molding type watch winding stem excellent in proof stress in the bending direction.
樹脂が硬化した後、固定側型板５を移動し、可動側型
板６を左右に開き、さらに押し出しピン９により可動側
型板７から竜頭部３を押し出すことにより第１図に示す
巻真は製造される。After the resin has hardened, the fixed mold 5 is moved, the movable mold 6 is opened to the left and right, and the crown 3 is pushed out of the movable mold 7 by the push-out pins 9 to form the winding stem shown in FIG. Is manufactured.
（発明の効果） 本発明の一体形成タイプの腕時計用巻真の製造方法
は、竜頭部と巻真部の接合工程が不用であるため、極め
て容易、かつ迅速に低コストの腕時計用巻真を得ること
が可能である。特に、細い巻真部の方から樹脂を充填し
ているので、細い巻真部や注入口から離れた竜頭部の充
填不足が生じることがなく、強度が高く、品質の良い巻
真を製造することができる。(Effect of the Invention) The method of manufacturing the integral winding type watch winding stem of the present invention does not require the step of joining the crown and the winding stem portion. It is possible to get. In particular, since the resin is filled from the narrow winding part, there is no insufficient filling of the narrow winding part or the crown away from the injection port, and a high strength and high quality winding stem is manufactured. be able to.
また、本発明の製造方法は接合工程が無いために、高
精度な巻真を製造することができ、自動組立等への導入
も容易である。In addition, since the manufacturing method of the present invention does not include a bonding step, a highly accurate winding stem can be manufactured, and introduction to automatic assembly and the like is easy.
さらに、ガラス繊維のフィラーを混入した樹脂を使用
した場合は、耐久力に優れた腕時計用巻真を安価で得る
ことができる。Furthermore, when a resin mixed with a glass fiber filler is used, a winding stem with excellent durability can be obtained at low cost.
さらに、ガス抜き穴10を有する押し出しピン９を使用
することにより、竜頭部３の端面にネーム等を浮き出し
文字にて形成することもでき、また容易にネーム変更す
ることもできる。Further, by using the push-out pin 9 having the gas vent hole 10, a name or the like can be formed by embossed characters on the end face of the crown 3, and the name can be easily changed.
第１図は本発明の一実施例に係る腕時計用巻真を示す斜
視図、 第２図は第１図に示す腕時計用巻真の製造工程を示す
図、 第３図は従来の腕時計用巻真を示す分解斜視図である。 ３……竜頭部、４……巻真部、５……固定側型板 6,7……可動側型板、８……注入口、 ９……押し出しピン、10……ガス抜き穴FIG. 1 is a perspective view showing a watch winding stem according to one embodiment of the present invention, FIG. 2 is a view showing a manufacturing process of the watch winding stem shown in FIG. 1, and FIG. It is a disassembled perspective view which shows true. 3 ... crown, 4 ... winding stem, 5 ... fixed-side mold plate 6, 7 ... movable-side mold plate, 8 ... injection port, 9 ... push-out pin, 10 ... gas vent hole
Claims (2)
真において、金型の巻真部先端に対応する部分に溶融樹
脂の注入口を設け、該注入口より金型の巻真部及び竜頭
部に対応する部分に溶融樹脂を充填して竜頭部と巻真部
を一体成形することを特徴とする腕時計用巻真の製造方
法。In a wristwatch winding stem comprising a crown and a winding stem portion, an injection port for molten resin is provided at a portion corresponding to the end of the winding stem portion of the mold, and the mold winding stem is inserted from the injection hole. A method for manufacturing a winding stem for a watch, characterized in that a molten resin is filled into a portion corresponding to the crown and the crown to integrally form the crown and the winding stem.
し出しピンを配置し、該押し出しピンにガス抜き穴を設
け、該ガス抜き穴から溶融樹脂の充填時に金型内部のガ
スを逃がすことを特徴とする特許請求の範囲第１項記載
の腕時計用巻真の製造方法。2. An extrusion pin is arranged at a portion corresponding to the tip of the crown of the mold, a gas vent hole is provided in the extrusion pin, and gas inside the mold is released from the gas vent hole when the molten resin is charged. A method for manufacturing a winding stem for a wristwatch according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61171998A JP2577889B2 (en) | 1986-07-22 | 1986-07-22 | Manufacturing method of watch winding stem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61171998A JP2577889B2 (en) | 1986-07-22 | 1986-07-22 | Manufacturing method of watch winding stem |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6327788A JPS6327788A (en) | 1988-02-05 |
| JP2577889B2 true JP2577889B2 (en) | 1997-02-05 |
Family
ID=15933630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61171998A Expired - Lifetime JP2577889B2 (en) | 1986-07-22 | 1986-07-22 | Manufacturing method of watch winding stem |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2577889B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5333578U (en) * | 1976-08-25 | 1978-03-24 | ||
| JPS5724876A (en) * | 1980-07-21 | 1982-02-09 | Matsushita Electric Works Ltd | Gear device for watch |
-
1986
- 1986-07-22 JP JP61171998A patent/JP2577889B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6327788A (en) | 1988-02-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |