JPH0616341Y2

JPH0616341Y2 - clock

Info

Publication number: JPH0616341Y2
Application number: JP1985110341U
Authority: JP
Inventors: 庸弘田中; 敬一吉沢
Original assignee: 株式会社精工舎
Priority date: 1985-07-18
Filing date: 1985-07-18
Publication date: 1994-04-27
Anticipated expiration: 2000-07-18
Also published as: JPS6218684U

Description

【考案の詳細な説明】（産業上の利用分野）本考案は、時計に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a timepiece.

（従来の技術）従来の時計において中板７の軸受構造は、第３図示のよ
うに、中間車５はその上端部のホゾ５１を上板６にて軸
支し、下端にもホゾ５２を形成して、このホゾを中板７
の軸受部７１の軸受孔７２によって軸支する軸受構造で
あって、中間車５のカナ５３には分針車８が噛合してい
るものであった。(Prior Art) In the conventional timepiece, the bearing structure of the middle plate 7 is such that, as shown in the third illustration, the intermediate wheel 5 has the upper plate 6 pivotally supporting the hoso 51 at the upper end thereof and the hoso 52 at the lower end thereof. Form and form this mullet 7
The bearing structure is such that it is axially supported by the bearing hole 72 of the bearing portion 71, and the pinion wheel 8 meshes with the pinion 53 of the intermediate wheel 5.

ところで、この中間車５のカナ５３の径と軸部とは、成
形を容易にするため、ほぼ同一径またはこのカナの方を
やや小径にしたものであった。そのため分針車８の径
は、中間車５のカナ５３に十分噛合可能なように、大径
のものとなっていた。By the way, the diameter of the pinion 53 and the shaft portion of the intermediate wheel 5 are substantially the same or slightly smaller than the pinion in order to facilitate the molding. Therefore, the diameter of the minute hand wheel 8 is large so that it can be sufficiently meshed with the pinion 53 of the intermediate wheel 5.

（考案が解決しようとする問題点）ところで、時計の組立順序は、分針車８の後に中板７、
中間車５の順に組み込まれるが、この中間板を組み込む
とき、中板７の軸受部７１における分針車側に突出した
部分７１ａが、先に組み込まれている大径の分針車８の
歯部に接触するため、組込作業が煩雑となり、時計の組
立作業性を低下させ、時には分針車の歯部に損傷を与え
ることがあり、組立の自動化は不可能か、極めて困難で
あった。(Problems to be solved by the invention) By the way, the order of assembling the timepiece is as follows:
The intermediate wheels 5 are assembled in this order. When this intermediate plate is assembled, the portion 71a of the bearing portion 71 of the intermediate plate 7 that protrudes toward the minute hand wheel is attached to the tooth portion of the large-diameter minute wheel 8 that is previously installed. Because of the contact, the assembling work becomes complicated, the assembling workability of the timepiece is deteriorated, and sometimes the tooth portion of the minute hand wheel is damaged, and automation of the assembling is impossible or extremely difficult.

そこで本考案の目的は、成形を容易にするため歯車の軸
部とカナとを同一径またはこのカナの径の方がこの軸部
の径よりもやや小径である構成において、組立の自動化
が容易で、そのため組立作業性のよい時計を提供するこ
とにある。Therefore, the object of the present invention is to facilitate the automation of assembly in the structure in which the shaft portion of the gear and the pinion have the same diameter or the pinion diameter is slightly smaller than the shaft portion in order to facilitate the molding. Therefore, it is to provide a timepiece having a good assembling workability.

（問題点を解決するための手段）本考案の特徴は、第１歯車には軸部およびこの軸部と同
一径のカナが形成してあり、上記第１歯車のカナには第
２歯車が噛合する時計において、上記第１歯車を軸受す
る中板の軸受部に、上記第２歯車との軸間において、こ
の第２歯車の逃げ用の切欠部が形成してあり、この切欠
部は上記第２歯車に対し上記中板を真上から装着可能と
すべく上記第２歯車の歯先円の半径より僅かに大きい曲
率半径で上記軸受孔の一部が開口されるように切欠され
ているところにある。(Means for Solving Problems) A feature of the present invention is that a shaft portion and a pinion having the same diameter as the shaft portion are formed in the first gear, and the second gear is formed in the pinion of the first gear. In the meshing timepiece, a notch for escape of the second gear is formed in a bearing portion of an intermediate plate that bears the first gear between the shaft of the second gear and the shaft. The bearing plate is notched so that a part of the bearing hole is opened with a radius of curvature slightly larger than the radius of the addendum circle of the second gear so that the intermediate plate can be mounted right above the second gear. Where it is.

（作用）したがって、軸受部を組み込む時、中板の軸受部の切欠
部によって、先に組み込んである第２歯車の歯部が中板
の真上からの装着の障害になることがなく、したがって
組立の自動化によって効率よくこの軸受部を組み込むこ
とができる。(Operation) Therefore, when the bearing portion is assembled, the notch of the bearing portion of the intermediate plate does not cause the tooth portion of the second gear, which has been previously incorporated, to interfere with the mounting from directly above the intermediate plate. By automating the assembly, the bearing can be efficiently incorporated.

（実施例）図面に基づいて本考案の実施例を説明する。(Example) The Example of this invention is described based on drawing.

第１図において、第１歯車の一例としての中間車１の軸
部１１上端のホゾ１２は、上板２によって軸支され、こ
の中間車１の下端部には、軸部１１と同一径（それより
もやや小径のものを含む）のカナ１３が形成してあり、
さらに下端にはホゾ１４が形成してある。そして中間車
１のホゾ１４を軸支する中板３には、中間車１の軸部１
１が挿入する凹部が形成してあり、その底部は軸受部３
１となって、この軸受部には軸受孔３２が設けてある。
また中間車１のカナ１３には、第２歯車の一例としての
分針車４が噛合している。秒針車５は、分針車４と同軸
的に設けてあり、この秒針車５は中間車１と噛合してい
る。In FIG. 1, a hoso 12 at an upper end of a shaft 11 of an intermediate wheel 1 as an example of a first gear is pivotally supported by an upper plate 2, and a lower end of the intermediate wheel 1 has the same diameter as the shaft 11 ( Kana 13 (including slightly smaller diameter) is formed,
Further, a hoso 14 is formed at the lower end. The intermediate plate 3 that pivotally supports the hoso 14 of the intermediate wheel 1 has a shaft portion 1 of the intermediate wheel 1.
1 is formed with a recess, the bottom of which is the bearing 3
1, the bearing hole 32 is provided in this bearing portion.
A minute hand wheel 4 as an example of a second gear meshes with the pinion 13 of the intermediate wheel 1. The second hand wheel 5 is provided coaxially with the minute hand wheel 4, and the second hand wheel 5 meshes with the intermediate wheel 1.

ところで、中板３の軸受部３１における分針車４の設置
側、すなわち中間車１と分針車４との軸間には、第２図
示のように、切欠部３３が形成してあり、この切欠部の
内面形状は、この分針車４と同心的形状で、この分針車
からこの軸受部３１が逃げ、かつこの分針車４の回転の
障害にならないものでなければならない。そのため、切
欠部３３は、分針車４に対し中板３を真上から装着可能
とすべく分針車４の歯先円の半径より僅かに大きい曲率
半径で軸受孔３２の一部が開口されるように切欠されて
いる。しかし、切欠部３３の曲率半径によって形成され
る軸受孔３２の開口は、切欠部３３の端面が軸受孔３２
の中心を越えると、ホゾ１４が軸受孔３２から離脱する
危険性が大きいので、切欠部３３の端面は軸受孔３２の
中心に達しないように形成されている。By the way, as shown in FIG. 2, a notch 33 is formed on the bearing portion 31 of the intermediate plate 3 on the side where the minute hand wheel 4 is installed, that is, between the shafts of the intermediate wheel 1 and the minute hand wheel 4. The shape of the inner surface of the portion must be concentric with the minute hand wheel 4 so that the bearing portion 31 does not escape from the minute hand wheel 4 and does not hinder the rotation of the minute hand wheel 4. Therefore, in the notch 33, a part of the bearing hole 32 is opened with a radius of curvature slightly larger than the radius of the tip circle of the minute hand wheel 4 so that the intermediate plate 3 can be mounted to the minute hand wheel 4 from directly above. Is cut out as. However, regarding the opening of the bearing hole 32 formed by the radius of curvature of the cutout portion 33, the end surface of the cutout portion 33 has the bearing hole 32.
Since there is a great risk of the hoso 14 coming off from the bearing hole 32 if the center of the bearing hole 32 is exceeded, the end face of the notch 33 is formed so as not to reach the center of the bearing hole 32.

したがって、時計を組み立てる時は、分針車４を先に組
み込み、その後で中板３を組み込むが、その時は、軸受
部３１に切欠部３３が形成してあるため、この軸受部３
１は分針車４より逃げることができ、容易に組み立てる
ことができる。その後は、中間車１のホゾ１４を中板３
の軸受孔３２に軸支させるものである。Therefore, when the timepiece is assembled, the minute hand wheel 4 is installed first, and then the middle plate 3 is installed. At that time, since the notch 33 is formed in the bearing portion 31, the bearing portion 3 is formed.
1 can escape from the minute hand wheel 4 and can be easily assembled. After that, the hoso 14 of the intermediate car 1 is set to the middle plate 3
The bearing hole 32 is pivotally supported.

また、時計が小型化すると、軸受部３１に設けてある切
欠部３３によって、第２図示のように、軸受孔３２が異
常形孔になることがあるが、秒針車５からの回転力、分
針車４からの反力の大きさ、方向、軸摩擦損失によって
中間車１は、第２図右方向に押す力となって作用するの
で、軸受の摩擦損失は穴形が完全な円形の場合と変わら
ないで、十分な伝達効率が確保できるものである。When the timepiece is downsized, the notch 33 provided in the bearing portion 31 may cause the bearing hole 32 to have an abnormal shape as shown in the second illustration. However, the rotational force from the second hand wheel 5 and the minute hand The intermediate wheel 1 acts as a pushing force to the right in FIG. 2 depending on the magnitude, direction, and axial friction loss of the reaction force from the wheel 4. Therefore, the friction loss of the bearing is different from that when the hole shape is a perfect circle. It does not change and ensures sufficient transmission efficiency.

（考案の効果）以上の構成を有する本考案は、第１歯車には軸部および
この軸部と同一径のカナが形成してあり、そのためこの
カナに噛合する第２歯車がこのカナに噛合するに十分な
だけ大径であっても、この第２歯車の逃げ用の切欠部が
軸受穴の一部に達して形成してあるため、時計の組立効
率を高め、組立の自動化にも役立ち、小型の時計などに
おいても大きな歯形の歯車を使用できるものである。ま
た、第１歯車は、カナが軸部と同一径に形成してあるた
め、成形が容易である。(Effect of the Invention) In the present invention having the above configuration, the first gear has the shaft portion and the pinion having the same diameter as that of the shaft portion, and therefore the second gear that meshes with this pinion meshes with this pinion. Even if the diameter is large enough to make it possible, the notch for escape of this 2nd gear reaches a part of the bearing hole, which improves the assembly efficiency of the timepiece and also helps the automation of assembly. Even in a small watch, a gear with a large tooth profile can be used. Further, the first gear has a pinion formed to have the same diameter as that of the shaft portion, so that the first gear is easily molded.

[Brief description of drawings]

第１図は断面図、第２図は第１図II−II線拡大断面図、
第３図は従来技術を示す断面図である。１……第１歯車（中間車）、３……中板、３１……軸受部、３２……軸受孔、３３……切欠部、４……第２歯車（分針車）。FIG. 1 is a sectional view, FIG. 2 is an enlarged sectional view taken along line II-II of FIG.
FIG. 3 is a sectional view showing a conventional technique. 1 ... 1st gear (intermediate wheel), 3 ... middle plate, 31 ... bearing part, 32 ... bearing hole, 33 ... notch, 4 ... second gear (minute hand wheel).

───────────────────────────────────────────────────── フロントページの続き (56)参考文献実公昭54−5015（ＪＰ，Ｙ１) 実願昭55−75068号（実開昭56−175778 号）の願書に添付した明細書及び図面の内容を撮影したマイクロフィルム（ＪＰ, Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References The specifications and drawings attached to the application for Jpn. Micro film (JP, U)

Claims

[Scope of utility model registration request]

1. A first gear, a middle plate bearing the first gear, and a second gear that meshes with the first gear. The first gear has a shaft portion and the same shaft portion as the shaft portion. A diameter pinion is formed, the second gear meshes with the pinion of the first gear, and a bearing hole for axially supporting the first gear is formed in the intermediate plate. A bearing portion is formed, and a notch for escape of the second gear is formed between the bearing portion and a shaft of the second gear that meshes with the first gear. A part of the bearing hole is opened in the notch with a radius of curvature slightly larger than a radius of a tip circle of the second gear so that the intermediate plate can be mounted to the second gear from directly above. A watch characterized by being cut out like this.