JPH11287239A - Skipping of teeth preventing device in gear train mechanism - Google Patents
Skipping of teeth preventing device in gear train mechanismInfo
- Publication number
- JPH11287239A JPH11287239A JP9137898A JP9137898A JPH11287239A JP H11287239 A JPH11287239 A JP H11287239A JP 9137898 A JP9137898 A JP 9137898A JP 9137898 A JP9137898 A JP 9137898A JP H11287239 A JPH11287239 A JP H11287239A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- skipping
- shaft
- teeth
- spindle
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はプリンタ等に適用さ
れる輪列機構の歯とび防止装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skipping prevention device for a wheel train mechanism applied to a printer or the like.
【０００２】[0002]
【従来の技術】例えばプリンタにおいては、レイアウト
上もしくは組付け上の観点から板金よりなるフレームに
支軸を片持ち梁状に固定して、ここに駆動力を伝達する
中間伝達歯車を支持するような機構が採られている。2. Description of the Related Art In a printer, for example, a support shaft is fixed in a cantilever shape to a frame made of sheet metal from the viewpoint of layout or assembly, and an intermediate transmission gear for transmitting a driving force is supported here. Mechanism is adopted.
【０００３】ところがこのような支持機構を採った場合
には、図３に示したように、サイドフレームａ上の片持
ち梁型の軸ｂに設けた中間伝達歯車ｃに駆動歯車ｄから
図中反時計方向の回転力を受けると、トラクタｅのプー
リ軸駆動歯車ｆと噛合う中間伝達歯車ｃは、紙送りの負
荷抵抗を受けて軸ｂもしくはサイドフレームａを撓めつ
つ図中矢印方向に変位して、プーリ軸駆動歯車ｆもしく
は駆動歯車ｄとの間で歯とびを起こしかねないといった
不都合が生じる。However, when such a support mechanism is employed, as shown in FIG. 3, an intermediate transmission gear c provided on a cantilever type shaft b on a side frame a is connected to a drive gear d by a drive gear d. Upon receiving a counterclockwise rotational force, the intermediate transmission gear c meshing with the pulley shaft drive gear f of the tractor e flexes the shaft b or the side frame a in response to the load resistance of the paper feed while moving in the direction of the arrow in the figure. Displacement causes inconvenience such as skipping between the pulley shaft driving gear f and the driving gear d.
【０００４】[0004]
【発明が解決しようとする課題】本発明はこのような問
題に鑑みてなされたもので、その目的とするところは、
部品点数を増やすことなく、歯車相互の歯とびを確実に
抑えることができる新たな歯とび防止機構を提供するこ
とにある。SUMMARY OF THE INVENTION The present invention has been made in view of such a problem.
An object of the present invention is to provide a new tooth skipping prevention mechanism capable of reliably suppressing tooth skipping between gears without increasing the number of parts.
【０００５】[0005]
【課題を解決するための手段】すなわち、本発明はこの
ような課題を達成するために、フレームに片持ち梁状に
固定した支軸に、駆動力を伝達する中間歯車を取付けて
なる輪列機構において、フレームに一体的に取付けられ
る部材の一部に、支軸の自由端を支える支承片を折曲げ
形成するとともに、この支承片に、噛合い関係にある他
方の歯車に対して中間歯車が離間変位するのを抑える方
向に向けてフック状の軸受け部を凹設するようにして、
部品点数を増やすことなく歯車相互の歯とびを確実に抑
えるようにしたものである。In order to achieve the above object, the present invention provides a train wheel in which an intermediate gear for transmitting driving force is mounted on a support shaft fixed to a frame in a cantilever manner. In the mechanism, a support piece for supporting the free end of the support shaft is formed by bending a part of a member integrally attached to the frame, and the support piece has an intermediate gear with respect to the other gear engaged with the support gear. The hook-shaped bearing part is recessed in the direction to suppress the displacement of
The gear skipping between the gears is reliably suppressed without increasing the number of parts.
【０００６】[0006]
【発明の実施の形態】そこで以下に本発明の実施例につ
いて説明する。図１、図２はプリンタに適用した本発明
の一実施例を示したものである。Embodiments of the present invention will be described below. FIGS. 1 and 2 show an embodiment of the present invention applied to a printer.
【０００７】図において符号１で示したプリンタ本体の
サイドフレームには、支軸２の一端が片持ち梁状に固定
されていて、ここには、駆動力伝達輪列中の１伝達歯車
９と噛合って、その駆動力をトラクタユニット１０のプ
ーリ軸駆動歯車１３に伝える駆動力伝達用のアイドラ８
が回転自在に取付けられ、また、サイドフレーム１に設
けた係止段部３には、剛性を持たせるべく断面Ｌ字状に
折曲げ形成した紙ガイド板４が左右のサイドフレーム１
に懸渡して、全体を一体化するように組付け固定されて
いる。[0007] One end of a support shaft 2 is fixed in a cantilever shape to a side frame of the printer main body indicated by reference numeral 1 in the figure, and includes one transmission gear 9 in a driving force transmission train. A driving force transmission idler 8 that meshes and transmits the driving force to the pulley shaft driving gear 13 of the tractor unit 10.
Are rotatably mounted, and a paper guide plate 4 bent in an L-shaped cross section to provide rigidity is provided on a locking step 3 provided on the side frame 1.
And is fixedly assembled so as to integrate the whole.
【０００８】この紙ガイド板４の両端には、トラクタユ
ニット１０を構成する支持基体１１の下端に設けた係止
片１２と係合して支持基体１１を固定する係合孔５が設
けられ、また、この紙ガイド板４の一端からアイドラ８
の外方に向けて延びた部分には軸支承片６が上向きに折
曲げ形成されていて、この軸支承片６の先端には、支軸
２の自由端を支えて、支軸２が伝達歯車９や、トラクタ
ユニット１０のプーリ軸駆動歯車１３の軸心から離間す
ることのないように抑えるフック状の軸受け７が凹設さ
れていて、アイドラ８に紙送りの負荷が作用した際に生
じる支軸２の曲りや、サイドフレーム１の撓みを抑え
て、アイドラ８とこれらの歯車９、１３との間で歯とび
が生じることがないように構成されている。At both ends of the paper guide plate 4, engagement holes 5 are provided for engaging the locking pieces 12 provided at the lower end of the support base 11 constituting the tractor unit 10 to fix the support base 11. Further, an idler 8 is inserted from one end of the paper guide plate 4.
A shaft support piece 6 is bent upward at a portion extending outward of the shaft, and the free end of the support shaft 2 is supported at the tip of the shaft support piece 6 so that the support shaft 2 is transmitted. A hook-shaped bearing 7 for keeping the gear 9 and the pulley shaft driving gear 13 of the tractor unit 10 from being separated from the shaft center is recessed, and is generated when a paper feeding load acts on the idler 8. The bending of the support shaft 2 and the bending of the side frame 1 are suppressed so that the jumper does not occur between the idler 8 and the gears 9 and 13.
【０００９】このように構成された歯とび防止機構は、
左右のサイドフレーム１に設けた係止段部３に、紙ガイ
ド板４を上方から差し込むようにして固定する過程で、
その一端に折曲げ形成した軸支承片６のフック状軸受け
７を支軸２の自由端に係合して支持することができるた
め、プーリ軸駆動歯車１３を介してアイドラ８に紙送り
の負荷が作用した場合でも、支軸２の自由に係合したこ
の軸支承片６が支軸２の図中矢印方向の変位を、Ｌ字状
に曲成した紙ガイド板４と軸支承片６の面方向に働く剛
性により確実に抑えて、アイドラ８と伝達歯車９やプー
リ軸駆動歯車１７との間での歯とびの発生を未然に抑え
ることができる。The tooth skipping prevention mechanism configured as described above has the following features.
In the process of fixing the paper guide plate 4 to the locking step 3 provided on the left and right side frames 1 by inserting the paper guide plate 4 from above,
Since the hook-shaped bearing 7 of the shaft bearing piece 6 bent at one end can be engaged with and supported by the free end of the support shaft 2, the paper feed load is applied to the idler 8 via the pulley shaft drive gear 13. , The shaft support piece 6 freely engaged with the support shaft 2 can displace the support shaft 2 in the direction indicated by the arrow in the drawing by the L-shaped paper guide plate 4 and the shaft support piece 6. The rigidity acting in the plane direction can reliably suppress the occurrence of tooth skipping between the idler 8 and the transmission gear 9 or the pulley shaft driving gear 17 beforehand.
【００１０】[0010]
【発明の効果】以上述べたように本発明によれば、フレ
ームに一体的に取付けられる部材の一部に、フレームに
固定した片持ち梁の支軸の自由端を支持する支承片を折
曲げ形成して、この支承片に支軸が歯とび方向に変位す
るのを抑えるフック状の軸受け部を設けたので、中間歯
車等の歯車を組付けた後に組付けられる既存の部材を利
用して片持ち梁型の支軸の自由端を支えることを可能と
し、この支軸の変位を抑えることによってこの支軸に支
持される中間歯車の歯とびを確実に防止することができ
る。As described above, according to the present invention, a support piece for supporting a free end of a support shaft of a cantilever fixed to a frame is bent on a part of a member integrally attached to the frame. Formed, this bearing piece is provided with a hook-shaped bearing that suppresses the displacement of the support shaft in the tooth skipping direction, so that existing members that are assembled after installing gears such as intermediate gears are used. The free end of the cantilever-type support shaft can be supported, and by suppressing the displacement of the support shaft, it is possible to reliably prevent the jump of the intermediate gear supported by the support shaft.
【図１】本発明の一実施例を示す装置の斜視図である。FIG. 1 is a perspective view of an apparatus showing one embodiment of the present invention.
【図２】同上装置を分解して示した斜視図である。FIG. 2 is an exploded perspective view of the same device.
【図３】従来装置の一例を示した図である。FIG. 3 is a diagram showing an example of a conventional device.
【符号の説明】 １ サイドフレーム ４ 紙ガイド板 ６ 軸支承片 ７ フック状の軸受け ８ アイドラ ９ 伝達歯車 １０ トラクタ １３ プーリ軸駆動歯車[Description of Signs] 1 Side frame 4 Paper guide plate 6 Shaft bearing piece 7 Hook-shaped bearing 8 Idler 9 Transmission gear 10 Tractor 13 Pulley shaft drive gear
Claims (1)
に、駆動力を伝達する中間歯車を取付けてなる輪列機構
において、 上記フレームに一体的に取付けられる部材の一部に、上
記支軸の自由端を支える支承片を折曲げ形成するととも
に、該支承片に、噛合い関係にある他方の歯車に対して
上記中間歯車が離間変位するのを抑える方向に向けてフ
ック状の軸受け部を凹設したことを特徴とする輪列機構
における歯とび防止装置。1. A wheel train mechanism in which an intermediate gear for transmitting driving force is mounted on a support shaft fixed to a frame in a cantilever manner, wherein a part of a member integrally mounted on the frame includes A bearing piece supporting the free end of the shaft is formed by bending, and a hook-shaped bearing portion is formed on the bearing piece so as to prevent the intermediate gear from being displaced away from the other gear in meshing relation. A tooth skipping prevention device in a train wheel mechanism, wherein a gear is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9137898A JP3687719B2 (en) | 1998-04-03 | 1998-04-03 | Tooth jump prevention device in a gear train mechanism of a printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9137898A JP3687719B2 (en) | 1998-04-03 | 1998-04-03 | Tooth jump prevention device in a gear train mechanism of a printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11287239A true JPH11287239A (en) | 1999-10-19 |
| JP3687719B2 JP3687719B2 (en) | 2005-08-24 |
Family
ID=14024718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9137898A Expired - Fee Related JP3687719B2 (en) | 1998-04-03 | 1998-04-03 | Tooth jump prevention device in a gear train mechanism of a printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3687719B2 (en) |
-
1998
- 1998-04-03 JP JP9137898A patent/JP3687719B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3687719B2 (en) | 2005-08-24 |
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