JPH0438593B2 - - Google Patents
Info
- Publication number
- JPH0438593B2 JPH0438593B2 JP59073375A JP7337584A JPH0438593B2 JP H0438593 B2 JPH0438593 B2 JP H0438593B2 JP 59073375 A JP59073375 A JP 59073375A JP 7337584 A JP7337584 A JP 7337584A JP H0438593 B2 JPH0438593 B2 JP H0438593B2
- Authority
- JP
- Japan
- Prior art keywords
- paper
- platen
- pressure roller
- force
- pressing
- 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 - Lifetime
Links
- 230000032258 transport Effects 0.000 claims 3
- 230000000694 effects Effects 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
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
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
Description
【発明の詳細な説明】
本発明は印字装置の紙送り機構に関し、その目
的とするところは印字用紙の正転送り動作及び逆
転送り動作を円滑に行なわせることにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding mechanism of a printing device, and its purpose is to smoothly perform forward and reverse feeding operations of printing paper.
従来におけるこの種の紙送り機構は第１図に示
すように構成されていた。すなわち第１図におい
て、印字ヘツド１はプラテン２の長手方向（図面
に垂直な方向）に沿つて往復動し、該ヘツド１と
プラテン２間に支承された印字用紙３に印字を行
なう。前記用紙３は紙ガイド板４に案内されプラ
テン２に巻回されてた後、その両側縁に設けたミ
シン目孔に紙送りトラクタ機構５を構成する無端
状ピン付ベルト６のピン６ａが係合されている。
圧接ローラ７はばね８を介して回動支持シヤフト
９に取付けられている。ここでばね８は圧接力の
不均一を吸収するばねである。圧接ローラ７は、
シヤフト９を支点として回動機構すなわちレバー
又はカム（図示せず）により回動されプラテン２
に圧接されている。ここで印字用紙の正転送り時
には、紙送りモータ（図示せず）により紙送りト
ラクタ機構５のトラクタシヤフト１０が回動し無
端状ピン付ベルト６が走行されて用紙３が矢印の
正転方向に送られる。この時プラテン２もトラク
タシヤフト１０の回動に同期して回動し、用紙３
は圧接ローラ７によりバツクテンシヨンを与えら
れた状態で正転方向に送られる。この場合、プラ
テン２も回動するため圧接ローラ７の圧接力はバ
ツクテンシヨンを与えるだけの軽い圧転力に設定
してある。 A conventional paper feeding mechanism of this type was constructed as shown in FIG. That is, in FIG. 1, a printing head 1 reciprocates along the longitudinal direction of a platen 2 (perpendicular to the drawing) and prints on a printing paper 3 supported between the head 1 and the platen 2. After the paper 3 is guided by the paper guide plate 4 and wound around the platen 2, the pins 6a of the endless belt with pins 6 constituting the paper feed tractor mechanism 5 are engaged with perforations provided on both sides of the paper 3. are combined.
The pressure roller 7 is attached to a rotation support shaft 9 via a spring 8. Here, the spring 8 is a spring that absorbs uneven pressure contact force. The pressure roller 7 is
The platen 2 is rotated about the shaft 9 by a rotation mechanism, that is, a lever or a cam (not shown).
is pressed against. When the printing paper is transferred in the forward direction, the tractor shaft 10 of the paper feed tractor mechanism 5 is rotated by the paper feed motor (not shown), the endless belt with pins 6 is run, and the paper 3 is rotated in the forward direction of the arrow. sent to. At this time, the platen 2 also rotates in synchronization with the rotation of the tractor shaft 10, and the paper 3
is sent in the normal rotation direction while being given back tension by the pressure roller 7. In this case, since the platen 2 also rotates, the pressing force of the pressing roller 7 is set to a light rolling force sufficient to provide back tension.
ちなみにあまり強い圧接力を与えるとプラテン
２の駆動力を大きくしなければならず、プラテン
２と圧接ローラ７間での送りがプラテン２の方が
早いと用紙３は該プラテン２と、紙送りトラクタ
機構４との間でたるもでしまうという不都合を生
じる。 By the way, if too strong a pressure contact force is applied, the driving force of the platen 2 must be increased, and if the platen 2 is faster in feeding between the platen 2 and the pressure roller 7, the paper 3 will be moved between the platen 2 and the paper feed tractor. This causes the inconvenience of a barrel forming between the mechanism 4 and the mechanism 4.
次に逆転送り時には圧接ローラ７をシヤフト９
を支点としてプラテン２より回動させて離脱さ
せ、この状態でトラクタシヤフト１０に形成され
たマニユアルつまみ（図示せず）を逆転させて、
用紙を送り所要の位置に用紙を逆転送りさせた後
に、再度圧接ローラ７をプラテン２に圧接させる
操作が必要であつた。 Next, when feeding in reverse, the pressure roller 7 is moved to the shaft 9.
It is rotated from the platen 2 using the tractor shaft 10 as a fulcrum to remove it, and in this state, a manual knob (not shown) formed on the tractor shaft 10 is reversed.
After feeding the paper in the reverse direction to a desired position, it was necessary to press the pressure roller 7 against the platen 2 again.
しかるに本発明はかかる欠点を一掃しうるもの
であり、以下にその一実施例について第２図と共
に説明する。なお第２図において第１図と同一構
成部分には同一番号を付して詳細な説明を省略す
る。図において紙ガイド板１１はその一端がシヤ
フト１２を支点として印字装置のシヤーシ（図示
せず）に回転自在に軸支され、他端近傍に設けた
突片１１ａの長孔には圧接ローラの回転軸７ａが
回転及び上下動可能なように係合され、この回転
軸７ａは上記紙ガイド板１１に一端が固着された
板ばね１３によつて上方に付勢され、さらに紙ガ
イド板１１の他端とシヤーシとの間に懸架したば
ね１４によつて上記圧接ローラ７がプラテンに圧
接されている。上記圧接ローラ７はばね１３によ
り圧接力の不均一が吸収され、所要の圧接力を得
て、用紙３にバツクテンシヨンを与えている。１
５は作動力１６を有するプランジヤであり、作動
時にはその作動子１６先端のゴム体１７が図のよ
うに紙ガイド板９に押当てられる。 However, the present invention can eliminate such drawbacks, and one embodiment thereof will be described below with reference to FIG. 2. In FIG. 2, the same components as those in FIG. 1 are given the same numbers and detailed explanations are omitted. In the figure, one end of the paper guide plate 11 is rotatably supported on a chassis (not shown) of a printing device using a shaft 12 as a fulcrum, and a long hole in a protrusion 11a provided near the other end is used for rotating a pressure roller. A shaft 7a is engaged so that it can rotate and move up and down, and this rotation shaft 7a is urged upward by a leaf spring 13 whose one end is fixed to the paper guide plate 11. The pressure roller 7 is pressed against the platen by a spring 14 suspended between the end and the chassis. The pressure roller 7 has a spring 13 that absorbs unevenness in the pressure contact force, obtains the required pressure contact force, and provides back tension to the paper 3. 1
5 is a plunger having an actuating force 16, and when actuated, a rubber body 17 at the tip of the actuator 16 is pressed against the paper guide plate 9 as shown in the figure.
上記実施例において、用紙３を正転方向に送る
時は圧接ローラ７がばね１４の力で用紙３に圧接
された状態で、先述したと同様に、紙送りトラク
タ機構５とプラテンの作動によつて用紙送りが行
なわれる。 In the above embodiment, when the paper 3 is fed in the forward rotation direction, the pressure roller 7 is pressed against the paper 3 by the force of the spring 14, and the paper feeding tractor mechanism 5 and the platen are operated as described above. Then, the paper is fed.
一方、用紙３を逆転方向に送る時にはプランジ
ヤ１５に通電されて作動子１６が突出動され、そ
の先端の寸法吸収用ゴム体１７が紙ガイド１１を
シヤフト１２を支軸にして反時計方向に回動させ
る。したがつて圧接ローラ７は先述した正転送り
時の圧接力より強い圧接力でプラテン２に圧接さ
れるためプラテン２を逆転駆動し、トラクタ機構
４をそれに従動させる場合、プラテン２が圧接ロ
ーラ７の主駆動側となり、用紙３はたるむ事なく
逆転送りが自動的に行なわれる。 On the other hand, when the paper 3 is sent in the reverse direction, the plunger 15 is energized, the actuator 16 is moved to protrude, and the size absorbing rubber body 17 at the tip rotates the paper guide 11 counterclockwise around the shaft 12. make it move. Therefore, the pressure roller 7 is pressed against the platen 2 with a force stronger than the pressure force during the forward transfer described above, so when the platen 2 is driven in reverse and the tractor mechanism 4 is driven accordingly, the platen 2 is pressed against the pressure roller 7. The paper 3 is automatically fed in the reverse direction without sagging.
上記説明はプランジヤ１５を使用して圧接ロー
ラ７の圧接力を２段階に切り換えたが、レバー等
の部材を用いても同じ効果をうる事ができるし、
圧接力の切換段数は３以上とすることも可能であ
る。 In the above explanation, the plunger 15 is used to switch the pressure force of the pressure roller 7 into two stages, but the same effect can be obtained by using a member such as a lever.
It is also possible to set the number of switching stages of the pressure contact force to three or more.
以上説明したように本発明の印字装置の紙送り
機構によれば、圧接ローラの圧接力を段階的に切
換えるようにしているので、たとえば印字用紙の
正転送り時には圧接ローラの圧接力をバツクテン
シヨンとして用い、逆転送り時にはプラテンの回
動力を確実に用紙に伝える力として用い、印字用
紙の正転、逆転いずれの送り動作をも該用紙をた
るませることなく円滑に行なうことができる。 As explained above, according to the paper feed mechanism of the printing device of the present invention, the pressure contact force of the pressure roller is changed in stages, so that, for example, when forwarding printing paper, the pressure contact force of the pressure roller is changed gradually. During reverse feeding, the rotating force of the platen is used as a force to reliably transmit the printing paper to the paper, and the printing paper can be smoothly fed in both forward and reverse directions without causing the paper to sag.
第１図は従来の印字装置の紙送り機構を示す側
面図、第２図は本発明の一実施例における印字装
置の紙送り機構を示す側面図である。
１……印字ヘツド、２……プラテン、３……印
字用紙、５……紙送りトラクタ機構、６……無端
状ピン付ベルト、７……圧接ローラ、１１……紙
ガイド板、１３，１４……ばね、１５……プラン
ジヤ、１６……作動子、１７……ゴム体。
FIG. 1 is a side view showing a paper feeding mechanism of a conventional printing device, and FIG. 2 is a side view showing a paper feeding mechanism of a printing device according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Print head, 2...Platen, 3...Print paper, 5...Paper feeding tractor mechanism, 6...Endless pin belt, 7...Pressure roller, 11...Paper guide plate, 13, 14 ... Spring, 15 ... Plunger, 16 ... Actuator, 17 ... Rubber body.
Claims (1)
送するよう回転駆動されるプラテンと、 前記プラテンの近傍に設けられた圧接ローラ
と、 前記圧接ローラを前記プラテンに圧接する第１
の圧接手段と、 印字用紙の搬送経路の前記プラテンとは異なる
位置に設けられ、前記プラテンの回転によつて行
われる搬送方向とは逆の方向に印字用紙を搬送す
るトラクタ機構と、 前記プラテンの回転によつて印字用紙を一方の
方向に搬送する際には前記第１の圧接手段の圧接
力に加えて前記圧接ローラを前記プラテンに圧接
させる第２の圧接手段と、 を有することを特徴とする印字装置の紙送り機
構。[Claims] 1. A platen that is rotationally driven to hold print paper and convey the print paper in one direction; a pressure roller provided near the platen; and a pressure roller that presses the pressure roller against the platen. 1st
a tractor mechanism that is provided at a position different from the platen on the print paper transport path and transports the print paper in a direction opposite to the transport direction performed by rotation of the platen; A second pressing means for pressing the pressing roller against the platen in addition to the pressing force of the first pressing means when conveying the printing paper in one direction by rotation. The paper feed mechanism of a printing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7337584A JPS59209173A (en) | 1984-04-12 | 1984-04-12 | Sheet feeding mechanism of printing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7337584A JPS59209173A (en) | 1984-04-12 | 1984-04-12 | Sheet feeding mechanism of printing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59209173A JPS59209173A (en) | 1984-11-27 |
| JPH0438593B2 true JPH0438593B2 (en) | 1992-06-24 |
Family
ID=13516368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7337584A Granted JPS59209173A (en) | 1984-04-12 | 1984-04-12 | Sheet feeding mechanism of printing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59209173A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61160265A (en) * | 1985-01-07 | 1986-07-19 | Hitachi Ltd | Thermal transfer printer |
| JPS6446247U (en) * | 1987-09-18 | 1989-03-22 | ||
| JPH01153254U (en) * | 1988-04-15 | 1989-10-23 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS533154U (en) * | 1976-06-23 | 1978-01-12 | ||
| JPS5633663B2 (en) * | 1972-06-07 | 1981-08-05 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5621572Y2 (en) * | 1976-06-29 | 1981-05-21 | ||
| JPS55125456U (en) * | 1979-02-28 | 1980-09-05 | ||
| JPS5933651Y2 (en) * | 1979-08-22 | 1984-09-19 | 富士通株式会社 | Printer paper feed mechanism |
-
1984
- 1984-04-12 JP JP7337584A patent/JPS59209173A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5633663B2 (en) * | 1972-06-07 | 1981-08-05 | ||
| JPS533154U (en) * | 1976-06-23 | 1978-01-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59209173A (en) | 1984-11-27 |
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