JPH0429872A - Printer - Google Patents

Abstract

PURPOSE:To prevent the printing sound of a printing head from being leaked outside a case and to lower a noise level outside the case by providing a soundproof wall which is slidably supported by a support member, rotatably held at a support part, pressed by a pressing means against a member for depressing a printing medium on a platen, and pressed against the case at the end part thereof. CONSTITUTION:At the time of a printing action, a paper presser roller 13 is positioned on an operation position. A flap 16 is so pressed by a spring 17 that one end is pressed toward the paper presser roller 13 and the other end is pressed toward an upper cover 21. In the structure, the upper surface of a printing head 1 is sealed by an outer cover 14, the upper cover 21, the flap 16, the paper presser roller 13, and a platen 2 without preventing a recording paper feed action. Recording paper 3 is guided by the flap 16 at the time of the insertion action of the recording paper 3, thus never abutting against the upper cover 21 and generating a trouble. Furthermore, a printing sound generated by the impact of the printing wire of the printing head 1 against the platen 2 hardly leaks outside the outer case 14 and the upper cover 21 because the upper part of the printing head 1 is sealed. Therefore, the noise level outside printer is greatly reduced.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、ドツトインパクト方式等の印字装置の静音化
構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a noise reduction structure for a printing device such as a dot impact type printing device.

従来の技術 従来からパソコンやワークステーション等の出力装置に
印字装置か使用されている。2. Description of the Related Art Printing devices have traditionally been used as output devices for personal computers, workstations, and the like.

以下従来の印字装置について説明する。第７図は従来の
印字装置の断面図である。第７図において、■は内部に
印字ワイヤを駆動する電磁ソレノイドを複数個備えた印
字ヘットである。２は印字ヘッドＩの印字動作時の衝撃
を受ける円筒形状のプラテンで、記録紙３を裏面から支
持するとともに記録紙の搬送を行う。４は印字ヘッド１
を搭載するキャリッジで、プラテン２と平行に配置され
たキャリッジシャフト５を案内にして、プラテン２と平
行に移動可能に保持されている。７は紙送りローラーで
、プラテン２と平行に配置され、バネ８によりプラテン
２へ付勢されており、この紙送りローラー７のハネ８に
よるプラテン２への付勢はリリースレバー（図示せず）
により解除することか可能である。この紙送りローラー
７かプラテン２の方向へ付勢された状態では、記録紙３
は紙送りローラー７とプラテン２に挟まれプラテン２の
回転により搬送される。９は記録紙３をプラテン２に沿
って搬送するためのペーパーガイドである。１０は記録
紙３をプラテン２へ付勢する紙押え板であり、バネ（図
示せず。）により先端部がプラテン２に付勢されている
。１１はキャリッジ４に固定され印字ヘッド１の印字部
近傍に設けたペーパーホルダで、印字位置の記録紙３を
プラテン２に沿わせる。１２は円筒上の紙押えローラー
１３をプラテン２と平行に、かつ回転可能に支持する支
持部材で、プラテン２とキャリッジシャフト５とを支持
するンヤーシ（図示せず。）に支点１２ａを中心とし回
動可能に保持されている。この紙押えローラー１３は、
支持部材１２の回動により、記録紙３がプラテン２に装
着される挿入動作時には第８図に示すようにプラテン２
から退避する非作動位置に、記録紙３がプラテン２に装
着された後は第９図に示すようにバネ（図示せず。）に
より記録紙３をプラテン２に押圧する作動位置に移動可
能である。１４は印字ヘッド１やプラテン２等により構
成される印字機構部を覆い上面に開口部を持つ外装カバ
ーで、１５は外装カバー１４の上面開口部を覆う上面カ
バーである。この外装カバー１４及び上面カバー１５に
より筐体か構成させている。１８は上面カバー１５とと
もに外装カバー１４の上面開口部を覆う防音カバーで、
上面カバー１５に回動可能に保持されている。１９は記
録紙３をガイドするペーパースタンドである。A conventional printing device will be explained below. FIG. 7 is a sectional view of a conventional printing device. In FIG. 7, ``■'' is a print head that is internally equipped with a plurality of electromagnetic solenoids that drive print wires. Reference numeral 2 denotes a cylindrical platen which receives an impact during the printing operation of the print head I, supports the recording paper 3 from the back side, and also transports the recording paper. 4 is print head 1
The carriage is mounted such that it can be moved parallel to the platen 2 using a carriage shaft 5 arranged parallel to the platen 2 as a guide. Reference numeral 7 denotes a paper feed roller, which is arranged parallel to the platen 2 and is biased toward the platen 2 by a spring 8. The spring 8 of the paper feed roller 7 biases the platen 2 by a release lever (not shown).
It is possible to cancel it by When the paper feed roller 7 is biased toward the platen 2, the recording paper 3
is sandwiched between the paper feed roller 7 and the platen 2 and is conveyed by the rotation of the platen 2. Reference numeral 9 denotes a paper guide for conveying the recording paper 3 along the platen 2. Reference numeral 10 denotes a paper pressing plate that urges the recording paper 3 toward the platen 2, and its leading end is urged against the platen 2 by a spring (not shown). Reference numeral 11 denotes a paper holder fixed to the carriage 4 and provided near the printing section of the print head 1, which allows the recording paper 3 at the printing position to be aligned with the platen 2. Reference numeral 12 denotes a support member that rotatably supports a cylindrical paper pressing roller 13 in parallel with the platen 2, and is rotated around a fulcrum 12a on a support (not shown) that supports the platen 2 and the carriage shaft 5. It is kept movable. This paper press roller 13 is
By rotating the support member 12, during the insertion operation in which the recording paper 3 is mounted on the platen 2, the platen 2 is moved as shown in FIG.
After the recording paper 3 is attached to the platen 2, it can be moved to the operating position where the recording paper 3 is pressed against the platen 2 by a spring (not shown) as shown in FIG. be. Reference numeral 14 denotes an exterior cover having an opening on the upper surface that covers the printing mechanism section including the print head 1, platen 2, etc., and 15 denotes an upper surface cover that covers the upper surface opening of the exterior cover 14. The exterior cover 14 and the top cover 15 constitute a housing. 18 is a soundproof cover that covers the top opening of the exterior cover 14 together with the top cover 15;
It is rotatably held by the top cover 15. 19 is a paper stand that guides the recording paper 3.

以上のように構成された印字装置について、その動作を
以下に説明する。第８図に示すように、記録紙３はペー
パースタンド１９やペーパーガイド９に沿ってプラテン
２と紙送りローラー７の間へ挿入され、プラテン２と紙
送りローラー７に挟まれプラテン２の回転により紙押え
板１０、ペーパーホルダ１１等でガイドされプラテン２
の外周に沿ってプラテン２と紙押えローラー１３との間
へ搬送される。この記録紙３のプラテン２に装着させる
挿入動作終了後、第９図に示すように支持部材１２を回
動させると、紙押えローラー１３がバネ（図示せず。）
により記録紙３をプラテン２に押圧する。The operation of the printing device configured as described above will be described below. As shown in FIG. 8, the recording paper 3 is inserted between the platen 2 and the paper feed roller 7 along the paper stand 19 and paper guide 9, and is sandwiched between the platen 2 and the paper feed roller 7 by rotation of the platen 2. The platen 2 is guided by the paper press plate 10, paper holder 11, etc.
The paper is conveyed between the platen 2 and the paper pressing roller 13 along the outer periphery of the paper. After the insertion of the recording paper 3 onto the platen 2 is completed, when the support member 12 is rotated as shown in FIG. 9, the paper presser roller 13 is activated by a spring (not shown).
Press the recording paper 3 against the platen 2 by pressing the recording paper 3 against the platen 2.

この紙押えローラー１３により記録紙３をプラテン２に
押圧した状態で印字ヘットｌの印字ワイヤを駆動するこ
とにより、インクリボン（図示せず。）を記録紙３へ打
点し印字動作を行う。この印字ヘッド１の印字動作時に
印字ヘッド１の印字ワイヤがプラテン２に衝突すること
により発生する印字音は、紙押えローラー１３と上面カ
バー１５との間を通過し、記録紙３を排出する開口部か
ら外装カバー１４や上面カバー１５の外部に漏れ、また
、印字ヘッドより紙の搬送方向下流側に記録紙３の搬送
ガイドがないため、第８図に示すように記録紙３が上面
カバー１５に衝突し、記録紙３をプラテン２に装置する
ための挿入動作の特級づまりを起こしていた。By driving the print wire of the print head 1 while pressing the recording paper 3 against the platen 2 by the paper pressing roller 13, an ink ribbon (not shown) is applied to the recording paper 3 to perform a printing operation. The printing sound generated when the print wire of the print head 1 collides with the platen 2 during the printing operation of the print head 1 passes between the paper presser roller 13 and the top cover 15, and then passes through the opening from which the recording paper 3 is ejected. In addition, since there is no conveyance guide for the recording paper 3 on the downstream side of the print head in the paper conveyance direction, the recording paper 3 leaks from the top cover 15 to the exterior cover 14 and the top cover 15 as shown in FIG. This caused a special jam in the insertion operation for loading the recording paper 3 onto the platen 2.

発明が解決しようとする課題 前記従来の構成では、印字装置の最大音源である印字ヘ
ッドの上部に記録紙を排出するための開口部が存在する
ため、印字ヘッドの印字音か開口部より外装カバー１４
や上面カバー１７の外部に漏れやすい構造となっており
、印字装置外部の騒音レベルが大きくなるという問題点
を有していた。Problems to be Solved by the Invention In the above-mentioned conventional configuration, since there is an opening for discharging the recording paper at the top of the print head, which is the largest source of sound in the printing device, the printing sound of the print head is heard from the opening and the outer cover. 14
The printing apparatus has a structure in which leakage easily occurs to the outside of the top cover 17, resulting in a problem in that the noise level outside the printing apparatus increases.

課題を解決するための手段 本発明は前記問題点を解決するため、支持部材に摺動可
能に支持されるとともに支持部において、回動可能に保
持され、付勢手段により印字媒体をプラテンへ押圧する
押圧部材へ付勢されるとともに端部が筐体へ付勢される
防音壁を備えた。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a printing medium that is slidably supported by a support member, is rotatably held in the support part, and presses a printing medium against a platen by a biasing means. The soundproof wall is biased toward the pressing member and whose end is biased toward the housing.

作用 本発明は前記した構成により印字ヘッドをプラテンと防
音壁と筐体とにより印字媒体の搬送を妨げずに密閉する
ことができる。According to the present invention, with the above-described configuration, the print head can be hermetically sealed by the platen, the soundproof wall, and the casing without interfering with the conveyance of the print medium.

実施例 第１図は本発明の一実施例における印字装置の断面図、
第２図は本発明の一実施例における印字装置の要部斜視
図である。第１図、第２図において、１は印字ヘッド、
２はプラテン、３は記録紙、４はキャリッジ、５はキャ
リッジシャフト、７は紙送りローラー、８はバネ、９は
ペーパーガイド、ｌＯは紙押え板、１１はペーパーホル
ダ、１２は支持部材、１３は紙押えローラー、１４は外
装カバー、１８は防音カバー、１９はペーパースタンド
でこれらは従来例の構成と同しものであるので詳細な説
明を省略する。６はプラテン２とキャリッジシャフト５
を支持するシャーシ、２１は外装カバー１４の上面開口
部を覆う上面カバーで両端部に突起部２１ａか設けられ
ている。１６はフラップで、突起部２＋ａに回動可能て
あり回動軸が摺動可能に支持されており、バネ１７によ
り紙押えローラー１３の方向へ付勢されるとともに端部
は上面カバー２１の方向へ付勢されている。Embodiment FIG. 1 is a sectional view of a printing device in an embodiment of the present invention.
FIG. 2 is a perspective view of essential parts of a printing device according to an embodiment of the present invention. In FIGS. 1 and 2, 1 is a print head;
2 is a platen, 3 is a recording paper, 4 is a carriage, 5 is a carriage shaft, 7 is a paper feed roller, 8 is a spring, 9 is a paper guide, IO is a paper press plate, 11 is a paper holder, 12 is a support member, 13 14 is a paper press roller, 14 is an exterior cover, 18 is a soundproof cover, and 19 is a paper stand. These are the same structures as in the conventional example, and detailed explanations thereof will be omitted. 6 is platen 2 and carriage shaft 5
A chassis 21 supporting the exterior cover 14 is a top cover that covers the top opening of the exterior cover 14, and has protrusions 21a at both ends. Reference numeral 16 denotes a flap, which is rotatably mounted on the protrusion 2+a, has a rotating shaft slidably supported, is biased by a spring 17 in the direction of the paper pressing roller 13, and has an end directed toward the top cover 21. is being energized.

以上のように構成された印字装置について、その動作を
以下に説明する。第３図に示すように、記録紙３はペー
パースタンドＩ９やペーパーガイド９に沿ってプラテン
２と紙送りローラー７の間へ挿入され、プラテン２と紙
送りローラー７とて挟まれ、プラテン２の回転により紙
押え板１ｏ、ペーパーホルダ１１等でガイドされプラテ
ン２の外周に沿ってプラテン２と紙押えローラー１３と
の間へ搬送されるが、この時紙押えローラー１３は、プ
ラテン２より離れた非作動位置にあり、フラップＩ６は
記録紙３の搬送ガイドの役目をする。この記録紙３のプ
ラテン２に装着させる挿入動作終了後、第４図に示すよ
うに支持部材１２をプラテン２の方向へ回動させると、
紙押えローラー１３かバネ（図示せず）により記録紙３
をプラテン２に押圧する。The operation of the printing device configured as described above will be described below. As shown in FIG. 3, the recording paper 3 is inserted between the platen 2 and the paper feed roller 7 along the paper stand I9 and the paper guide 9, and is sandwiched between the platen 2 and the paper feed roller 7. As the paper rotates, it is guided by the paper presser plate 1o, the paper holder 11, etc., and is conveyed along the outer periphery of the platen 2 between the platen 2 and the paper presser roller 13. At this time, the paper presser roller 13 is separated from the platen 2. In the non-operating position, the flap I6 serves as a conveyance guide for the recording paper 3. After the insertion operation for mounting the recording paper 3 on the platen 2 is completed, when the support member 12 is rotated in the direction of the platen 2 as shown in FIG.
The recording paper 3 is held down by the paper presser roller 13 or a spring (not shown).
is pressed against platen 2.

この紙押えローラー１３により記録紙３をプラテン２に
押圧した状態で、印字ヘッド１の印字ワイヤを駆動する
ことにより、インクリボン（図示せず）を記録紙３へ打
点し印字動作を行う。この印字動作時、紙押えローラー
１３は作動位置にありフラップ１６は、第４図に示した
バネ１７により一方の端部は紙押えローラー１３の方向
へもう一方の端部は上面カバー２１の方向へ付勢され、
印字ヘッド１の上部を外装カバー１４と上面カバー２１
とフラップ１６と紙押えローラー１３とプラテン２とに
より記録紙の搬送動作を妨げずに密閉構造とする。With the paper pressing roller 13 pressing the recording paper 3 against the platen 2, by driving the printing wire of the print head 1, an ink ribbon (not shown) is applied to the recording paper 3 to perform a printing operation. During this printing operation, the paper presser roller 13 is in the operating position, and the flap 16 is moved by the spring 17 shown in FIG. is energized to
The upper part of the print head 1 is covered with an exterior cover 14 and a top cover 21.
The flap 16, the paper pressing roller 13, and the platen 2 form a sealed structure without interfering with the conveyance operation of the recording paper.

この構造により、記録紙３の挿入動作時に記録紙３はフ
ラップ１６にガイドされるため記録紙３が上面カバー２
１にぶつかり搬送動作の不具合を生じることがなく、記
録紙３の搬送が確実でスムーズに行える。しかも、印字
ヘッド１の印字動作時に印字ヘッド１の印字ワイヤがプ
ラテン２に衝突することにより発生する印字音は、印字
ヘッド１の上部を密閉しているため、外装ケース１４や
上面カバー２１の外部に漏れにくく、印字装置外部の騒
音レベルを大幅に低下させることができる。With this structure, the recording paper 3 is guided by the flap 16 when the recording paper 3 is inserted.
The recording paper 3 can be transported reliably and smoothly without causing problems in the transport operation due to collision with the paper 1. Moreover, since the upper part of the print head 1 is sealed, the printing sound generated when the print wire of the print head 1 collides with the platen 2 during the printing operation of the print head 1 is removed from the outside of the outer case 14 and the top cover 21. It is difficult to leak, and the noise level outside the printing device can be significantly reduced.

なお、本発明の一実施例ては、フラップ１６は上面カバ
ー２１に設けられた突起部２１ａに保持されていたが、
フラップ１６は第５図に示すように支持部材１２に回動
及びスライド可能に保持させても実現可能であり、同様
にンヤーン６や外装ケース１４にフラップ１６を保持し
ても実現可能である。Note that in one embodiment of the present invention, the flap 16 was held by a protrusion 21a provided on the top cover 21;
The flap 16 can also be realized by being rotatably and slidably held by the support member 12 as shown in FIG. 5, and it can also be similarly realized by holding the flap 16 by the yarn 6 or the outer case 14.

また、紙押えローラー１３の非作動位置と作動位置の切
り換え時および紙送りローラー１３の回転時に、フラッ
プ１６と紙押えローラー１３および上面カバー２１はす
べり接触を行うため、上面カバー２１とフラップ１６は
樹脂材料で、紙押えローラー１３は樹脂材料に比べ摩擦
抵抗の少ない金属材料で構成した方が望ましい。さらに
、第６図に示すようにフラップＩ６と紙押えローラー１
３および上面カバー１５の間にフェルト等のすへり部材
２０を介在させたり、フラップ１６の一部にフッ素樹脂
等のコーティングを施したり等、密閉状態を確保しつつ
もフラップ１６と紙押えローラー１３および上面カバー
２１とのすへり状態をスムーズにしてやれば、さらに良
好な紙押えローラー１３の作動位置と非作動位置との切
り換え操作が行える。Furthermore, when the paper press roller 13 is switched between the non-operating position and the active position, and when the paper feed roller 13 is rotated, the flap 16, the paper press roller 13, and the top cover 21 make sliding contact, so the top cover 21 and the flap 16 are It is preferable that the paper pressing roller 13 is made of a metal material, which has less frictional resistance than a resin material. Furthermore, as shown in FIG.
3 and the top cover 15, or a part of the flap 16 is coated with fluororesin or the like, while ensuring a sealed state. If the contact with the top cover 21 is made smooth, the paper presser roller 13 can be switched between the operating position and the non-operating position even better.

発明の効果 本発明は、支持部材に摺動可能に支持されるとともに支
持部において回動可能に保持され、付勢手段により印字
媒体をプラテンへ押圧する押圧部材へ付勢せれるととも
に端部が筐体へ付勢される防音壁を備えたことにより、
印字ヘットをプラテンと防音壁と筐体とにより印字媒体
の搬送を妨げずに密閉することができ、印字ヘッドの印
字音が筐体外部に漏れにくく、筐体外部の騒音レベルを
低下させることが可能となる。Effects of the Invention The present invention is slidably supported by a support member, is rotatably held in the support part, is biased by a biasing means to a pressing member that presses a print medium against a platen, and has an end portion. By having a soundproof wall that is biased toward the housing,
The print head can be sealed between the platen, the soundproof wall, and the casing without interfering with the conveyance of the print medium, making it difficult for the print sound from the print head to leak outside the casing, reducing the noise level outside the casing. It becomes possible.

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

第１図は本発明の一実施例における印字装置の断面図、
第２図は本発明の一実施例における印字装置の要部名１
視図、第３図は紙押えローラー１３か非作動位置にある
ときの要部断面図、第４図は紙送りローラー１３が作動
位置にあるときの要部断面図、第５図は本発明の一実施
例における印字装置の他の実施例の要部断面図、第６図
は本発明の一実施例における印字装置の他の実施例の要
部断面図、第７図は従来の印字装置の断面図、第８図は
従来の印字装置の紙押えローラー１３が非作動位置にあ
るときの要部断面図、第９図は紙押えローラー１３か作
動位置にあるときの要部断面図である。 １・・・・・・印字ヘッド、２・・・・・・プラテン、
３・・・・・・記録紙、１１・・・・・・支持部材、１
２・・・・・・紙押えローラー１４・・・・・・外装カ
バー、１６・・・・・・フラップ、１７・・・・・・バ
ネ、２１・・・・・・上面カバ 代理人の氏名　弁理士　粟野重孝　他１名！：；４１ −ＮすＬ＞じ艶ミ≧セ（ミミミに ◇〕 区 Ｑつ 憾 ＪFIG. 1 is a sectional view of a printing device in an embodiment of the present invention;
FIG. 2 shows the main parts of a printing device according to an embodiment of the present invention.
3 is a sectional view of the main part when the paper press roller 13 is in the non-operating position, FIG. 4 is a sectional view of the main part when the paper feed roller 13 is in the operative position, and FIG. FIG. 6 is a sectional view of a main part of another embodiment of a printing device according to an embodiment of the present invention, and FIG. 7 is a sectional view of a main part of another embodiment of a printing device according to an embodiment of the present invention. 8 is a sectional view of the main part of a conventional printing device when the paper press roller 13 is in the non-operating position, and FIG. 9 is a sectional view of the main part when the paper press roller 13 is in the operative position. be. 1... Print head, 2... Platen,
3...Recording paper, 11...Supporting member, 1
2...Paper press roller 14...Exterior cover, 16...Flap, 17...Spring, 21...Top cover agent Name: Patent attorney Shigetaka Awano and 1 other person! :;41 -NsuL＞Jiyanmi≧Se (Mimimi ◇) Ward Qtsu 憾J

Claims (2)

【特許請求の範囲】[Claims] （１）筐体と、筐体に収容され印字媒体に印字を行う印
字ヘッドと、印字媒体を裏面より保持するプラテンと印
字媒体を前記プラテンへ押圧する押圧部材とを有し、支
持部材に摺動可能に支持されるとともに支持部において
回道可能に保持され、付勢手段により前記押圧部材へ付
勢されるとともに端部が前記筐体の方向へ付勢された防
音壁を備えたことを特徴とする印字装置。(1) It has a housing, a print head that is housed in the housing and prints on a print medium, a platen that holds the print medium from the back side, and a pressing member that presses the print medium against the platen. The soundproof wall is supported movably and is held in a circular manner in the support portion, is biased toward the pressing member by biasing means, and has an end biased toward the housing. Characteristic printing device. （２）前記防音壁の前記筐体、前記押圧部材への当接部
に潤滑部材を設けたことを特徴とする特許請求の範囲第
１項記載の印字装置。(2) The printing device according to claim 1, characterized in that a lubricating member is provided at a portion of the soundproof wall that comes into contact with the housing and the pressing member.