JPH0351547Y2 - - Google Patents
Info
- Publication number
- JPH0351547Y2 JPH0351547Y2 JP1986130299U JP13029986U JPH0351547Y2 JP H0351547 Y2 JPH0351547 Y2 JP H0351547Y2 JP 1986130299 U JP1986130299 U JP 1986130299U JP 13029986 U JP13029986 U JP 13029986U JP H0351547 Y2 JPH0351547 Y2 JP H0351547Y2
- Authority
- JP
- Japan
- Prior art keywords
- wheel
- input
- ratchet
- axis
- driven
- 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
Links
- 230000002265 prevention Effects 0.000 claims description 6
- 210000000078 claw Anatomy 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Impression-Transfer Materials And Handling Thereof (AREA)
- Gear Transmission (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案はプリンターやタイプライター用のリボ
ンカセツト等に好適な逆転防止機構に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a reverse rotation prevention mechanism suitable for ribbon cassettes for printers and typewriters.
（従来の技術）
従来の逆転防止機構の１例が第５図に示され、
入力軸０１に固定された平歯車０２の歯０２ａに
その斜方向から板ばね０３の先端がその弾発力に
より押し付けられていて、入力軸０１が実線矢印
方向に正転するときは板ばね０３の先端が平歯車
０２の歯０２ａを順次乗り越えるので入力軸０１
は正転できるが、入力軸０１が逆転しようとする
と、板ばね０３の先端が平歯車０２の歯０２ａに
噛合して入力軸０１の逆転を阻止するよになつて
いる。(Prior Art) An example of a conventional reverse rotation prevention mechanism is shown in FIG.
The tip of the leaf spring 03 is pressed obliquely against the tooth 02a of the spur gear 02 fixed to the input shaft 01 by its elastic force, and when the input shaft 01 rotates normally in the direction of the solid line arrow, the leaf spring 03 The tip of the input shaft 01 sequentially overcomes the teeth 02a of the spur gear 02.
can rotate in the normal direction, but when the input shaft 01 tries to rotate in the reverse direction, the tip of the leaf spring 03 meshes with the teeth 02a of the spur gear 02 to prevent the input shaft 01 from rotating in the reverse direction.
従来の逆転防止機構の他の例が第６図に示さ
れ、入力軸０４に固定されたラチエツトホイール
０５のラチエツト０５ａに軸０６に回動可能に軸
支されたレバー０７の一端の爪０７ａがレバー０
７の他端に張設されたコイルスプリング０８の弾
発力により押し付けられていて、入力軸０４が実
線矢印方向に正転するときは爪０７ａがラチエツ
ト０５ａを順次乗り越えるので入力軸０４は正転
できるが、入力軸０４が逆転しようとすると、爪
０７ａがラチエツト０５ａに噛合して入力軸０４
の正転を阻止するようになつている。 Another example of the conventional anti-reverse mechanism is shown in FIG. 6, in which a pawl 07a at one end of a lever 07 is rotatably supported on a shaft 06 by a ratchet 05a of a ratchet wheel 05 fixed to an input shaft 04. is lever 0
When the input shaft 04 rotates normally in the direction of the solid line arrow, the pawl 07a successively overcomes the ratchet 05a, so the input shaft 04 rotates normally. However, when the input shaft 04 tries to reverse, the pawl 07a engages with the ratchet 05a and the input shaft 04
It is designed to prevent forward rotation.
（考案が解決しようとする問題点）
上記従来の逆転防止機構においては、入力軸０
１，０４が正転するとき、板ばね０３の先端や爪
０７ａが歯０２ａ、ラチエツト０５ａを乗り越え
るためその接触抵抗により入力軸０１や０４の回
転トルクを無駄に費消するのみならず板ばね０３
の先端や爪０７ａが歯０２ａ、ラチエツト０５ａ
を乗り越える度に次の歯車０２ａやラチエツト０
５ａに衝突するので騒音が発生するという不具合
があつた。また、板ばね０３やレバー０７を設置
するためのスペースを要するため機構が大型とな
るという問題があつた。(Problem to be solved by the invention) In the conventional reverse rotation prevention mechanism described above, the input shaft 0
When the input shafts 01 and 04 rotate in the normal direction, the tip of the leaf spring 03 and the claw 07a overcome the teeth 02a and the ratchet 05a, so the contact resistance not only wastes the rotational torque of the input shafts 01 and 04, but also causes the leaf spring 03 to rotate in the normal direction.
The tip and claw 07a are tooth 02a, ratchet 05a
Each time you get over the next gear 02a or ratchet 0
There was a problem in that the collision with 5a caused noise. Further, there is a problem that the mechanism becomes large because a space is required to install the leaf spring 03 and the lever 07.
（課題を解決するための手段）
本考案は上記問題点に対処するために提案され
たものであつて、その要旨とするところは、セツ
テングプレート又はカバーに支持されてその軸芯
まわりに正転又は逆転しうる入力輪と、この入力
輪と常時噛合して上記入力輪の正転又は逆転に伴
つて軸芯まわりに正転又は逆転すると同時に上記
入力輪の軸芯を中心とする円弧に沿つて正方向方
又は逆方向に移動する従動輪と、上記セツテイン
グプレート又はカバーに穿設され上記円弧方向に
長い長穴と、上記従動輪にこれと同芯に固定され
上記長穴内に位置するラチエツトホイールと、上
記長穴内に突出し上記従動輪が上記逆方向に移動
したとき上記ラチエツトホイールのラチエツトと
噛合して上記従動輪の逆転を阻止する爪とを具え
ていることを特徴とする逆転防止機構にある。(Means for Solving the Problems) The present invention has been proposed in order to deal with the above problems, and its gist is to provide a device that is supported by a setting plate or cover and that is oriented around its axis. An input wheel that can rotate or reverse rotation, and an input wheel that is constantly meshed with this input wheel and rotates forward or reverse around the axis as the input wheel rotates forward or reverse, and at the same time rotates in an arc centered on the axis of the input wheel. a driven wheel that moves in the forward or reverse direction along the axis, an elongated hole drilled in the setting plate or cover and long in the arc direction, and fixed to the driven wheel concentrically with the elongated hole and located in the elongated hole. and a pawl that protrudes into the elongated hole and engages with the ratchet of the ratchet wheel when the driven wheel moves in the opposite direction to prevent the driven wheel from reversing. It has a reverse rotation prevention mechanism.
（作用）
本考案においては、上記構成を具えているた
め、入力輪がその軸芯まわりに正転するときはこ
の回転力によつて入力輪と常時噛合する従動輪が
その軸芯まわりに正転すると同時に入力輪の軸芯
を中心とする円弧に沿つて正方向に移動し、これ
に伴つてラチエツトホイールが長穴内を正方向に
移動してそのラチエツトが爪から離脱するのでラ
チエツトホイール、従動輪及び入力輪は正転す
る。しかし、入力輪がその軸芯まわりに逆転する
と、この回転力によつて従動輪が入力輪の軸芯を
中心とする円弧に沿つて逆方向に移動せしめら
れ、これに伴つてラチエツトホイールが長穴内を
逆方向に移動してそのラチエツトが爪と噛合する
ので、ラチエツトホイール、従動輪及び入力輪の
逆転が阻止される。(Function) Since the present invention has the above configuration, when the input wheel rotates normally around its axis, this rotational force causes the driven wheel, which is constantly meshed with the input wheel, to rotate normally around its axis. At the same time as the input wheel rotates, it moves in the positive direction along an arc centered on the axis of the input wheel, and as a result, the ratchet wheel moves in the positive direction within the elongated hole and the ratchet separates from the pawl, causing the ratchet wheel to move in the positive direction. , the driven wheel and the input wheel rotate forward. However, when the input wheel reverses around its axis, this rotational force causes the driven wheel to move in the opposite direction along an arc centered on the input wheel's axis, and as a result, the ratchet wheel moves in the opposite direction. Since the ratchet moves in the opposite direction within the elongated hole and engages with the pawl, reverse rotation of the ratchet wheel, driven wheel, and input wheel is prevented.
（実施例）
本考案の１実施例が第１図ないし第４図に示さ
れている。(Embodiment) An embodiment of the present invention is shown in FIGS. 1 to 4.
第１図ないし第４図において、１は入力軸で、
その上下両端は図示しないセツテイングプレート
及びカバーにその軸芯まわりに正転又は逆転可能
に軸支されている。２は入力軸１に固定された入
力歯車、３は従動軸で、その上下両端は上記セツ
テイングプレート及びカバーに穿設され、入力軸
１の軸芯を中心とする円弧状の長穴４ａ内に嵌合
されている。４は入力歯車２と常時噛合する従動
歯車で従動軸３に固定されている。５はラチエツ
トホイールで、上記従動軸３の上端に固定され、
上記円弧状の長穴４ａ内に位置さしめられてい
る。６は長穴４ａ内に突出する爪である。 In Figures 1 to 4, 1 is the input shaft;
Its upper and lower ends are supported by a setting plate and a cover (not shown) so that they can rotate forward or reverse around their axis. 2 is an input gear fixed to the input shaft 1, and 3 is a driven shaft, the upper and lower ends of which are bored in the setting plate and cover, and are inserted into an arc-shaped elongated hole 4a centered on the axis of the input shaft 1. is mated to. 4 is a driven gear that constantly meshes with the input gear 2 and is fixed to the driven shaft 3. 5 is a ratchet wheel fixed to the upper end of the driven shaft 3;
It is positioned within the arc-shaped elongated hole 4a. 6 is a claw protruding into the elongated hole 4a.
しかして、入力軸１が第３図に実線矢印で示す
ようにその軸芯まわりの反時計方向に正転する
と、入力歯車２と噛合する従動歯車４は入力歯車
２の回転力によつて一点鎖線矢印で示すように入
力軸１の軸芯を中心とする円弧Ａに沿つて正方向
に付勢され、従動軸３及びラチエツトホイール５
が長穴４ａ内を移動し、これに伴つて爪６がラチ
エツトホイール５のラチエツトから離脱し、従動
軸３は長穴４ａの終端に当接した図示の位置を占
める。 When the input shaft 1 rotates in the counterclockwise direction around its axis as shown by the solid line arrow in FIG. As shown by the chain arrow, the input shaft 1 is biased in the positive direction along an arc A centered on the axis, and the driven shaft 3 and the ratchet wheel 5
moves within the elongated hole 4a, the pawl 6 disengages from the ratchet of the ratchet wheel 5, and the driven shaft 3 occupies the illustrated position in contact with the end of the elongated hole 4a.
かくして、従動歯車４及びラチエツトホイール
５は実線矢印に示すようにその軸芯まわりに時計
方向に正転する。 Thus, the driven gear 4 and the ratchet wheel 5 rotate clockwise around their axes as shown by the solid arrow.
逆に、入力軸１が第４図に破線矢印で示すよう
に時計方向に逆点すると、従動軸３及びラチエツ
トホイール５は一点鎖線矢印で示すように円弧Ａ
に沿つて長穴４ａ内を逆方向に移動せしめられ
て、爪６がラチエツトホイール５のラチエツトと
噛合するので、ラチエツトホイール５及び従動歯
車４は回転を阻止されこれに伴つて入力歯車２の
逆転も阻止される。 Conversely, when the input shaft 1 is reversed clockwise as shown by the dashed line arrow in FIG.
The pawl 6 meshes with the ratchet of the ratchet wheel 5, and the ratchet wheel 5 and the driven gear 4 are prevented from rotating, and the input gear 2 is thereby prevented from rotating. The reversal of is also prevented.
なお、上記実施例において、入力歯車２及び従
動歯車４を用いているが、これに代えて入力ロー
ラとこれに噛合する従動ローラを用いることがで
きる。 In the above embodiment, the input gear 2 and the driven gear 4 are used, but instead of this, an input roller and a driven roller that meshes with the input roller can be used.
（考案の効果）
本考案においては、セツテングプレート又はカ
バーに支持されてその軸芯まわりに正転又は逆転
しうる入力輪と、この入力輪と常時噛合して上記
入力輪の正転又は逆転に伴つて軸芯まわりに正転
又は逆転すると同時に上記入力輪の軸芯を中心と
する円弧に沿つて正方向又は逆方向に移動する従
動輪と、上記セツテイングプレート又はカバーに
穿設され上記円弧方向に長い長穴と、上記従動輪
にこれと同芯に固定され上記長穴内に位置するラ
チエツトホイールと、上記長穴内に突出し上記従
動輪が上記逆方向に移動したとき上記ラチエツト
ホイールのラチエツトと噛合して上記従動輪の逆
転を阻止する爪とを具えているため、入力輪がそ
の軸芯まわりに正転するときはこの回転力によつ
て入力輪と常時噛合する従動輪がその軸芯まわり
に正転すると同時に入力輪の軸芯を中心とする円
弧に沿つて正方向に移動し、これに伴つてラチエ
ツトホイールが長穴内を正方向に移動してそのラ
チエツトが爪から離脱するのでラチエツトホイー
ル、従動輪及び入力輪は正転する。しかし、入力
輪がその軸芯まわりに逆転すると、この回転力に
よつて従動輪が入力輪の軸芯を中心とする円弧に
沿つて逆方向に移動せしめられ、これに伴つてラ
チエツトホイールが長穴内を逆方向に移動してそ
のラチエツトが爪と噛合するので、ラチエツトホ
イール、従動輪及び入力輪の逆転が阻止される。(Effect of the invention) In the present invention, an input wheel is supported by a setting plate or a cover and can rotate forward or reverse around its axis, and the input wheel is constantly meshed with the input wheel to rotate the input wheel forward or reverse. a driven wheel that rotates forward or reverse around its axis as the input wheel rotates in the forward or reverse direction along an arc centered on the axis of the input wheel; an elongated hole elongated in an arc direction; a ratchet wheel that is fixed concentrically to the driven wheel and positioned within the elongated hole; and a ratchet wheel that protrudes into the elongated hole and when the driven wheel moves in the opposite direction. This rotational force causes the driven wheel, which is always engaged with the input wheel, to rotate normally when the input wheel rotates around its axis. At the same time, the input wheel rotates in the normal direction around its axis, and at the same time moves in the normal direction along an arc centered on the axis of the input wheel, and as a result, the ratchet wheel moves in the positive direction within the elongated hole, and the ratchet moves away from the pawl. Since it is disengaged, the ratchet wheel, driven wheel, and input wheel rotate in the normal direction. However, when the input wheel reverses around its axis, this rotational force causes the driven wheel to move in the opposite direction along an arc centered on the input wheel's axis, and as a result, the ratchet wheel moves in the opposite direction. Since the ratchet moves in the opposite direction within the elongated hole and engages with the pawl, reverse rotation of the ratchet wheel, driven wheel, and input wheel is prevented.
かくして、従来のもののように入力輪と噛合し
てその逆転を阻止する板ばねやレバーを要しない
ので逆転機構の部品点数が減るとともに構造が簡
単となつて小型、軽量となるのみならず入力輪の
正転時にこれに圧接する板ばねやレバーに接触抵
抗により入力輪の回転トルクを無駄に費消するこ
とはなく、また、騒音を発生することもない。 In this way, there is no need for a leaf spring or lever that engages with the input wheel and prevents its reversal as in conventional systems, so the number of parts in the reversing mechanism is reduced, the structure is simple, and the input wheel is not only smaller and lighter, but also more compact and lightweight. The rotational torque of the input wheel is not wasted due to contact resistance of the leaf spring or lever that presses against the lever during forward rotation, and no noise is generated.
第１図ないし第４図は本考案の１実施例を示
し、第１図は斜視図、第２図は側面図、第３図は
入力輪の正転時における上面図、第４図は入力輪
の逆転時における上面図である。第５図及び第６
図はそれぞれ従来の逆転防止機構を示す側面図で
ある。
入力輪……２、従動輪……４、ラチエツトホイ
ール……５、長穴……４ａ、爪……６。
Figures 1 to 4 show one embodiment of the present invention, where Figure 1 is a perspective view, Figure 2 is a side view, Figure 3 is a top view when the input wheel rotates in the normal direction, and Figure 4 is an input wheel. FIG. 6 is a top view when the wheels are reversed. Figures 5 and 6
Each figure is a side view showing a conventional reverse rotation prevention mechanism. Input wheel...2, driven wheel...4, ratchet wheel...5, slotted hole...4a, pawl...6.
Claims (1)
の軸芯まわりに正転又は逆転しうる入力輪と、こ
の入力輪と常時噛合して上記入力輪の正転又は逆
転に伴つて軸芯まわりに正転又は逆転すると同時
に上記入力輪の軸芯を中心とする円弧に沿つて正
方向又は逆方向に移動する従動輪と、上記セツテ
イングプレート又はカバーに穿設され上記円弧方
向に長い長穴と、上記従動輪にこれと同芯に固定
され上記長穴内に位置するラチエツトホイール
と、上記長穴内に突出し上記従動輪が上記逆方向
に移動したとき上記ラチエツトホイールのラチエ
ツトと噛合して上記従動輪の逆転を阻止する爪と
を具えていることを特徴とする逆転防止機構。 An input wheel that is supported by a setting plate or cover and can rotate forward or reverse around its axis; a driven wheel that moves in the forward or reverse direction along an arc centered on the axis of the input wheel at the same time as the rotation is reversed; A ratchet wheel that is fixed concentrically to the driving wheel and located in the elongated hole, and a ratchet wheel that protrudes into the elongated hole and meshes with the ratchet of the driven wheel when the driven wheel moves in the opposite direction. A reverse rotation prevention mechanism characterized by comprising a claw that prevents reverse rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986130299U JPH0351547Y2 (en) | 1986-08-28 | 1986-08-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986130299U JPH0351547Y2 (en) | 1986-08-28 | 1986-08-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6336744U JPS6336744U (en) | 1988-03-09 |
| JPH0351547Y2 true JPH0351547Y2 (en) | 1991-11-06 |
Family
ID=31027663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986130299U Expired JPH0351547Y2 (en) | 1986-08-28 | 1986-08-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0351547Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5966205B2 (en) * | 2012-09-25 | 2016-08-10 | 国際ディスプレイ工業株式会社 | Rotation direction controller for single-phase AC synchronous motor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5624142A (en) * | 1979-08-02 | 1981-03-07 | Sekisui Jushi Co Ltd | Production of cushioning package material |
-
1986
- 1986-08-28 JP JP1986130299U patent/JPH0351547Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5624142A (en) * | 1979-08-02 | 1981-03-07 | Sekisui Jushi Co Ltd | Production of cushioning package material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6336744U (en) | 1988-03-09 |
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