JPH0121795B2 - - Google Patents
Info
- Publication number
- JPH0121795B2 JPH0121795B2 JP59148074A JP14807484A JPH0121795B2 JP H0121795 B2 JPH0121795 B2 JP H0121795B2 JP 59148074 A JP59148074 A JP 59148074A JP 14807484 A JP14807484 A JP 14807484A JP H0121795 B2 JPH0121795 B2 JP H0121795B2
- Authority
- JP
- Japan
- Prior art keywords
- ink ribbon
- ribbon cassette
- drive roller
- drive
- roller
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J32/00—Ink-ribbon cartridges
- B41J32/02—Ink-ribbon cartridges for endless ribbons
Landscapes
- Impression-Transfer Materials And Handling Thereof (AREA)
Description
【発明の詳細な説明】
従来、プリンタ等に使用されるインクリボンカ
セツトの内部構造の一例を第１図および第２図に
示す。DETAILED DESCRIPTION OF THE INVENTION An example of the internal structure of an ink ribbon cassette conventionally used in printers and the like is shown in FIGS. 1 and 2.
第１図において、インクリボンカセツト１内に
収納されているインクリボン２は駆動ローラ３と
従動ローラ４で圧接挾持され、駆動手段（図示せ
ず）によつて駆動ローラ３が回転し、インクリボ
ン２はインクリボン収納室５へ押し込まれてイン
クリボン２の送行が行なわれる。ここで、インク
リボンカセツト１内の駆動ローラ３が駆動手段と
係合し、Ａ方向にのみ回転しておれば問題はな
い。しかし従来、インクリボンカセツト１が駆動
手段より離脱されると、駆動ローラ３はどちらの
方向へも自由に回転できる構造となつている。
今、インクリボンカセツト１を手に持つて第２図
に示すように駆動ローラ３をＢ方向へ回転させた
時、インクリボン２はインクリボンカセツト１の
通路６内へ押し込まれ、この通路６の空間が狭い
ため、インクリボン２のジヤミング、破損等を生
じ、使用不能となる。この結果インクリボンカセ
ツト１を交換しなくてはならなくなる事態を招く
危険性があつた。 In FIG. 1, an ink ribbon 2 stored in an ink ribbon cassette 1 is held in pressure contact between a drive roller 3 and a driven roller 4, and the drive roller 3 is rotated by a drive means (not shown), and the ink ribbon 2 is is pushed into the ink ribbon storage chamber 5, and the ink ribbon 2 is fed. Here, there is no problem as long as the drive roller 3 in the ink ribbon cassette 1 engages with the drive means and rotates only in the A direction. However, conventionally, when the ink ribbon cassette 1 is removed from the drive means, the drive roller 3 is configured to freely rotate in either direction.
Now, when you hold the ink ribbon cassette 1 in your hand and rotate the drive roller 3 in the direction B as shown in FIG. 2, the ink ribbon 2 is pushed into the passage 6 of the ink ribbon cassette 1, and the space in this passage 6 is Because it is narrow, the ink ribbon 2 may be jammed or damaged, making it unusable. As a result, there was a risk that the ink ribbon cassette 1 would have to be replaced.
本発明はかかる欠点を一掃するためのもので、
駆動ローラとインクリボンカセツトとの間に逆回
転防止機構を設けて信頼性の高いインクリボンカ
セツトを提供するものである。 The present invention is intended to eliminate such drawbacks,
A reverse rotation prevention mechanism is provided between the drive roller and the ink ribbon cassette to provide a highly reliable ink ribbon cassette.
以下、図面に示す実施例に基づいて本発明を説
明する。 The present invention will be described below based on embodiments shown in the drawings.
第３図および第４図において、プリンタ本体あ
るいは印字ヘツド（図示せず）を搭載したキヤリ
ツジ（図示せず）に設けられたインクリボンを駆
動するための駆動軸７がインクリボンカセツト８
内に設けられた駆動ローラ９と係合している。駆
動ローラ９は従動ローラ１０と挾持し、従動ロー
ラ１０はバネ部材１１により駆動ローラ９を付勢
している。駆動ローラ９の側下面１１には逆転を
防ぐためにつめ１２が設けられ、インクリボンカ
セツト側に設けられたつめ１３と係合しあつてい
る。第３図に示すように、駆動軸７が駆動ローラ
９に係合すると、駆動軸７が駆動ローラ９を矢印
Ｃ方向へ押し上げるので駆動ローラ９とインクリ
ボンカセツト８とのつめ１２，１３によるロツク
がはずれ、スムーズな回転が可能となる。このた
め、インクリボンカセツトをキヤリツジに搭載し
ての印字時においては、つめ１２と１３による異
音は発生しない。一般に駆動軸７は一方向（Ｄ方
向）にのみ回転するようになつているため、この
場合、逆転することはない。 In FIGS. 3 and 4, a drive shaft 7 for driving an ink ribbon provided in a printer body or a carriage (not shown) on which a print head (not shown) is mounted is connected to an ink ribbon cassette 8.
It engages with a drive roller 9 provided therein. The driving roller 9 is held between a driven roller 10 and the driven roller 10 urges the driving roller 9 by a spring member 11. A pawl 12 is provided on the lower side surface 11 of the drive roller 9 to prevent reverse rotation, and is engaged with a pawl 13 provided on the ink ribbon cassette side. As shown in FIG. 3, when the drive shaft 7 engages with the drive roller 9, the drive shaft 7 pushes up the drive roller 9 in the direction of arrow C, so that the drive roller 9 and the ink ribbon cassette 8 are locked by the pawls 12 and 13. This allows for smooth rotation. Therefore, during printing with the ink ribbon cassette mounted on the carriage, no abnormal noise is generated by the claws 12 and 13. Generally, the drive shaft 7 is configured to rotate only in one direction (direction D), so in this case, it will not rotate in the reverse direction.
しかし、インクリボンカセツト８を駆動軸７よ
り離脱させ、手に持つて手等により駆動ローラ９
を回転させた場合、回転されるために、駆動ロー
ラ９は矢印Ｅ方向へ力が働きＦ方向への回転は可
能であるが、Ｇ方向へはつめ１２，１３によりロ
ツクされ、回転不可能となる。 However, the ink ribbon cassette 8 is removed from the drive shaft 7, and the drive roller 9 is removed by holding it in the hand or the like.
When the drive roller 9 is rotated, a force is exerted on the drive roller 9 in the direction of the arrow E and it is possible to rotate in the F direction, but it is locked by the pawls 12 and 13 in the G direction and cannot be rotated. Become.
なお、逆転防止機構については、上記の主旨を
逸脱しない範囲において多種の変形がある。 Note that there are various modifications to the reverse rotation prevention mechanism within the scope of the above-mentioned spirit.
以上の説明において明らかなように本発明によ
れば駆動ローラとインクリボンカセツトとの間に
逆転を防ぐための機構を設けているため、インク
リボンの逆送行を防ぐことができ、インクリボン
のジヤミングによる破損のない信頼性に富んだイ
ンクリボンカセツトを提供することが可能とな
り、実用的効果は大なるものである。 As is clear from the above description, according to the present invention, since a mechanism is provided between the drive roller and the ink ribbon cassette to prevent reverse rotation, it is possible to prevent the ink ribbon from being fed backwards, thereby preventing jamming of the ink ribbon. It becomes possible to provide a highly reliable ink ribbon cassette that is free from damage, and has great practical effects.
さらに、インクリボンカセツトをキヤリツジに
装着した状態においては逆転防止機構による逆転
防止が解除されるため、この逆転防止機構に起因
する異音の発生を防止することができるという効
果も合わせ持つ。 Furthermore, since the reverse rotation prevention mechanism is released when the ink ribbon cassette is mounted on the carriage, it is also possible to prevent abnormal noises caused by the reverse rotation prevention mechanism.
第１図、第２図は一般のインクリボンカセツト
の内部構造を示す平面図、第３図および第４図は
それぞれ本発明の一実施例におけるインクリボン
カセツトの要部断面図である。
８……インクリボンカセツト、９……駆動ロー
ラ、１２，１３……つめ。
1 and 2 are plan views showing the internal structure of a general ink ribbon cassette, and FIGS. 3 and 4 are sectional views of essential parts of an ink ribbon cassette according to an embodiment of the present invention, respectively. 8... Ink ribbon cassette, 9... Drive roller, 12, 13... Pawl.
Claims (1)
ンクリボンカセツトにおいて、駆動源より回転さ
れる前記インクリボンの駆動ローラとインクリボ
ンカセツト筐体との間に逆転防止機構を設けると
共に、このインクリボンカセツト筐体をキヤリツ
ジに装着した状態では前記逆転防止機構による逆
転防止動作を解除する手段を設けたことを特徴と
するインクリボンカセツト。 ２ 駆動ローラとインクリボンカセツトの互いに
対向する部分に、波状をなすつめを夫々設けて駆
動ローラの逆転防止機構を構成すると共に、イン
クリボンカセツトをキヤリツジに装着した状態に
おいては駆動軸に押されて前記駆動ローラの前記
つめがインクリボンカセツトの前記つめと離間す
るように前記駆動ローラを摺動可能に構成したこ
とを特徴とする特許請求の範囲第１項に記載のイ
ンクリボンカセツト。[Scope of Claims] 1. In an ink ribbon cassette that stores an endless ink ribbon in an amorphous shape, a reversal prevention mechanism is provided between the ink ribbon drive roller rotated by a drive source and the ink ribbon cassette housing, and An ink ribbon cassette characterized in that the ink ribbon cassette is provided with means for releasing the reverse rotation prevention operation by the reverse rotation prevention mechanism when the ink ribbon cassette housing is mounted on a carriage. 2. A wavy pawl is provided on the mutually opposing portions of the drive roller and the ink ribbon cassette to constitute a mechanism for preventing the drive roller from reversing, and when the ink ribbon cassette is mounted on the carriage, it is pushed by the drive shaft and the drive roller is The ink ribbon cassette according to claim 1, wherein the drive roller is configured to be slidable so that the pawl of the roller is spaced apart from the pawl of the ink ribbon cassette.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14807484A JPS6099689A (en) | 1984-07-16 | 1984-07-16 | Ink ribbon cassette |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14807484A JPS6099689A (en) | 1984-07-16 | 1984-07-16 | Ink ribbon cassette |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6099689A JPS6099689A (en) | 1985-06-03 |
| JPH0121795B2 true JPH0121795B2 (en) | 1989-04-24 |
Family
ID=15444632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14807484A Granted JPS6099689A (en) | 1984-07-16 | 1984-07-16 | Ink ribbon cassette |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6099689A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4948274A (en) * | 1989-01-12 | 1990-08-14 | Sercomp Corporation | Ribbon feed mechanism |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5587591A (en) * | 1978-12-27 | 1980-07-02 | Seiko Epson Corp | Ink ribbon cartridge |
-
1984
- 1984-07-16 JP JP14807484A patent/JPS6099689A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6099689A (en) | 1985-06-03 |
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