JPS583948Y2 - Gear mesh positioning mechanism - Google Patents

Description

【考案の詳細な説明】 本考案は、冠歯車と平歯車との噛合位置決め機構に関す
る。[Detailed Description of the Invention] The present invention relates to a meshing positioning mechanism for a crown gear and a spur gear.

歯車機構を組み立てる時、一方の歯車の一定の歯に、必
ず他方の歯車の一定の歯を噛合させたい場合がある。When assembling a gear mechanism, there are cases where it is desired that certain teeth of one gear mesh with certain teeth of the other gear.

例えば、タイマーを備えた時計であって、一方の歯車が
目安表示機構に関係し、他方が時計表示機構に関係して
いる場合などである。For example, in a watch equipped with a timer, one gear is associated with a reference display mechanism and the other gear is associated with a clock display mechanism.

このような場合において、冠歯車と平歯車の噛合位置を
決めるには、従来、冠歯車にはその回転軸と平行な孔を
設け、また平歯車にはその回転軸と直行し、かつ軸心を
通る孔を設け、それらの孔に、別に用意した治具用のピ
ンを挿入し、二つの孔位置が合った後、歯車をフレーム
に取り付け、ピンを引き抜くようにしていた。In such cases, in order to determine the meshing position of the crown gear and spur gear, conventionally, the crown gear is provided with a hole parallel to its rotation axis, and the spur gear is provided with a hole perpendicular to its rotation axis and with a hole parallel to its axis. Holes were made to pass through, and pins for a jig prepared separately were inserted into those holes. After the two holes were aligned, the gear was attached to the frame and the pins were pulled out.

しかし、このようなものは、噛合させる歯車のほかに治
具用のピンを必要とするばかりでなく、特に平歯車の歯
数が少い場合などには作業性が極めて悪かった。However, such a device not only requires a jig pin in addition to the gears to be engaged, but also has extremely poor workability, especially when the spur gear has a small number of teeth.

本考案は、歯車を特殊な形状になすことにより、従来の
ような治具を必要とすることなく、冠歯車と平歯車の噛
合位置を決めることができる歯車の噛合位置決め機構を
提供する。The present invention provides a gear meshing positioning mechanism that can determine the meshing position of a crown gear and a spur gear without requiring a conventional jig by forming the gears into a special shape.

本考案を、図示したタイマー付時計の実施例で説明スる
と、１はスリー７・タイマー用の歯車、２は時計機構と
連動する歯車、３は筒部３ａでの嵌合により軸４で回転
可能であり、かつ周面に設けられた歯部３ｂと、側面に
設けられた歯部３Ｃと、側面に軸４と平行に植立された
ピン３ｄとを有する冠歯車、５は平歯車であり、この平
歯車５には、その軸部５ａの周面にリング状に突部５ｂ
を設け、かつ一端には図示していない目安車に対向する
周知の歯車と噛合する歯部５Ｃを、また他端には冠歯車
３の歯部３ｃと噛合する歯部５ｄを設け、更に軸部５ａ
と歯部５ｄの間には縁部５ｅを、また歯部５ｄにはピン
３ｄと係合する長溝５ｆを設けである。To explain the present invention using the illustrated embodiment of a timer watch, 1 is a gear for the timer, 2 is a gear interlocked with the clock mechanism, and 3 is connected to the shaft 4 by fitting with the cylindrical part 3a. 5 is a spur gear which is rotatable and has a tooth portion 3b provided on the circumferential surface, a tooth portion 3C provided on the side surface, and a pin 3d planted on the side surface parallel to the shaft 4. This spur gear 5 has a ring-shaped protrusion 5b on the circumferential surface of its shaft portion 5a.
A toothed portion 5C that meshes with a well-known gear facing a reference wheel (not shown) is provided at one end, and a toothed portion 5d that meshes with the toothed portion 3c of the crown gear 3 is provided at the other end. Part 5a
An edge 5e is provided between and the toothed portion 5d, and a long groove 5f that engages with the pin 3d is provided in the toothed portion 5d.

６は合成樹脂製のフレームであり、歯車５を回転可能に
支承する軸受部６ａｔ６ｂには弾性が付与され、かつ突
部５ｂを受は入れる馬蹄形の溝６ｃが設けられている。Reference numeral 6 designates a frame made of synthetic resin, and a bearing portion 6at6b that rotatably supports the gear 5 is imparted with elasticity and is provided with a horseshoe-shaped groove 6c into which the protrusion 5b is received.

上記の構成の歯車を組み付けるには、先ず冠歯車３を軸
４に回転可能に取り付ける。To assemble the gears configured as described above, first, the crown gear 3 is rotatably attached to the shaft 4.

次に冠歯車３のピン３ｄに長溝５ｆを係合させるように
して平歯車５をフレーム６に取り付ける。Next, the spur gear 5 is attached to the frame 6 so that the pin 3d of the crown gear 3 is engaged with the long groove 5f.

このフレーム６への取り付けは、軸部５ａを第３図の右
方から押し込むと、軸受部６ ａ ｔ ６ ｂＡ咄己の
弾性により相互に開いて第１，３図位置へ受は入れる。For attachment to the frame 6, when the shaft portion 5a is pushed in from the right side in FIG. 3, the elasticity of the bearing portions 6a, 6b, and 6a open each other and the receivers are placed in the positions shown in FIGS. 1 and 3.

しかし、この状態でも軸受部５ａ 、５ｂは突部５ｂに
より末だ常態より開かれている。However, even in this state, the bearing portions 5a and 5b are still opened more than normal by the protrusion 5b.

この１１では両歯車の位置決めはできているが、お互に
回転できないので、次に歯車５を第１図の位置から左方
へ移動させる。In 11, both gears have been positioned, but cannot rotate relative to each other, so next gear 5 is moved to the left from the position shown in FIG.

そして突部５ｂが溝６Ｃの位置１でくると、軸受部６ａ
、６ｂが更に自己の弾性で復元し、突部５ｂを溝６Ｃ
に係合させる。When the protrusion 5b comes to position 1 of the groove 6C, the bearing part 6a
, 6b is further restored by its own elasticity, and the protrusion 5b is inserted into the groove 6C.
to engage.

これで歯車５はフレーム６に取り付けられたことになり
、かつこの時、ピン３ｄと長溝５ｆとの係合は解かれて
いるので、両歯車３，５は互に回転可能になっている。The gear 5 is now attached to the frame 6, and at this time, the engagement between the pin 3d and the long groove 5f is released, so both gears 3 and 5 can rotate relative to each other.

前記した歯車５の第１図における左方への移動は、歯部
３ｃと歯部５ｄを噛合させた１寸で行うので、歯車５が
取り付けられる前にピン３ｄと長溝５ｆとの係合がはず
れても両歯車３，５の噛合位置は、ずれることがない。The aforementioned movement of the gear 5 to the left in FIG. 1 is carried out by one inch in which the tooth portions 3c and 5d are meshed, so that the pin 3d and the long groove 5f are engaged with each other before the gear 5 is attached. Even if the gears 3 and 5 are disengaged, the meshing positions of the gears 3 and 5 will not shift.

上記の実施例においては、平歯車５をフレーム６へ取り
付けるのに、フレーム６を合成樹脂型として軸受部６ａ
、６ｂの弾性を利用するものであるが、慣用方法の如く
、軸部５ａをフレームに設けられた孔に貫挿し、Ｅリン
グ等で抜は止めするようにしてもよいし、また歯車３，
５の取付順序は、実施例の場合とは逆に、最初に歯車５
をフレームに取り付けておき、ピン３ｄと長溝５ｆとの
係合の解除は、冠歯車３の軸４を第１図において右方へ
移動させることにより行い、その位置で軸４をフレーム
に軸止めするようにしてもよく、更に実施例では、ピン
３ｄを冠歯車３に、長溝５ｆを平歯車５に形成したが、
これとは逆の関係にして、冠歯車３の筒部３ａにメクラ
穴を設け、平歯車５の歯車５ｄの側面に、その軸心より
ずれた位置にその軸方向に向ってピンを植立してもよく
、このようなものはすべて本考案に台筐れる。In the above embodiment, in order to attach the spur gear 5 to the frame 6, the frame 6 is made of synthetic resin and the bearing portion 6a is
, 6b, the shaft portion 5a may be inserted into a hole provided in the frame and prevented from being removed with an E-ring or the like, as in the conventional method, or the gear 3,
5, the gear 5 is installed first, contrary to the case of the embodiment.
is attached to the frame, and the engagement between the pin 3d and the long groove 5f is released by moving the shaft 4 of the crown gear 3 to the right in Fig. 1, and at that position, the shaft 4 is fixed to the frame. Furthermore, in the embodiment, the pin 3d is formed on the crown gear 3, and the long groove 5f is formed on the spur gear 5.
Contrary to this, a blind hole is provided in the cylindrical portion 3a of the crown gear 3, and a pin is planted in the side surface of the gear 5d of the spur gear 5 at a position offset from its axis in the axial direction. All of these things are included in the present invention.

以上のように本考案によれば、冠歯車と平歯車のいずれ
か一方に突起部を設け、かつ他方に凹部を設けることに
より、この突起部と凹部を係合させた位置で、いずれか
一方の歯車を平歯車の軸方向へ移動させ、上記の保合の
はずれた位置でその移動させた歯車を軸止めするように
したものであるから、従来のものに比べ治具類を一切必
要とせず、しかも組立作業を飛躍的に向上させることが
でき、特に精密機械類に用いて効果が犬である。As described above, according to the present invention, by providing a protrusion on one of the crown gear and the spur gear and providing a recess on the other, either one of the crown gear and the spur gear is provided with a recess at a position where the protrusion and the recess are engaged. The gear is moved in the axial direction of the spur gear, and the moved gear is stopped at a position that is out of the above-mentioned locking position, so no jigs are required compared to conventional ones. Moreover, it can dramatically improve assembly work, and is particularly effective when used in precision machinery.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は、本考案の実施例の説明図、第２図は第１図の
Ｉ−Ｉ線断面図、第３図は第１図の■−■線断面図であ
る。 ３・・・冠歯車、３ａ・・・筒部、３ｂ 、３ｃ・・・
歯部、３ｄ・・・ピン、５・・・平歯車、５ａ・・・軸
部、５ｂ・・・突部、５ｃ、５ｄ・・・歯部、５ｅ・・
・縁部、５ｆ・・・長溝、６・・・フレーム、６ａ、６
ｂ・・・軸受部、６ｃ・・・溝。FIG. 1 is an explanatory diagram of an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line I--I in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line ■--■ in FIG. 3... Crown gear, 3a... Cylinder part, 3b, 3c...
Teeth, 3d... Pin, 5... Spur gear, 5a... Shaft, 5b... Protrusion, 5c, 5d... Teeth, 5e...
・Edge, 5f... Long groove, 6... Frame, 6a, 6
b...Bearing part, 6c...Groove.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 冠歯車と平歯車のいずれか一方に突起部を、他方には凹
部を設け、いずれか一方の歯車を軸止めした位置で、こ
の突起部と凹部を係合させると共に両歯車を噛合させ、
その位置から他方の歯車を平歯車の軸方向へ移動させ、
前記の係合がはずれた位置でその移動させた歯車を軸止
めした構成を有する冠歯車と平歯車の噛合位置決め機構
。Providing a protrusion on one of the crown gear and the spur gear and a recess on the other, engaging the protrusion and the recess at the position where either one of the gears is shaft-locked, and meshing both gears;
From that position, move the other gear in the axial direction of the spur gear,
A meshing positioning mechanism for a crown gear and a spur gear, which has a structure in which the moved gear is shaft-locked at the position where the engagement is disengaged.