JPS62119076A - Mechanism for adjusting gap of printing head or printer - Google Patents

Mechanism for adjusting gap of printing head or printer

Info

Publication number
JPS62119076A
JPS62119076A JP25938085A JP25938085A JPS62119076A JP S62119076 A JPS62119076 A JP S62119076A JP 25938085 A JP25938085 A JP 25938085A JP 25938085 A JP25938085 A JP 25938085A JP S62119076 A JPS62119076 A JP S62119076A
Authority
JP
Japan
Prior art keywords
paper
lever
platen
roller
printing head
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.)
Pending
Application number
JP25938085A
Other languages
Japanese (ja)
Inventor
Tatsuhiko Oikawa
達彦 及川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP25938085A priority Critical patent/JPS62119076A/en
Publication of JPS62119076A publication Critical patent/JPS62119076A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00Actions or mechanisms not otherwise provided for
    • B41J25/304Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/308Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms

Landscapes

  • Common Mechanisms (AREA)

Abstract

PURPOSE:To make it possible to automatically and easily adjust the gap of a printing head to a proper value corresponding to the thickness of paper without generating an error, by mounting a link mechanism for moving the movable body of a paper thickness detection mechanism with the operation of a paper setting lever while displac ing the same to the side of a fixed body and moving the printing head to the side of a platen by detected movement quantity. CONSTITUTION:When a paper setting lever 22 is picked up and pushed down rearwardly, a link 25 is horizontally slid to a forward direction and a movable roller 20 moves downwardly in a state contacted with an inclined edge 25b under pressure to widen the interval between the roller 20 and a fixed roller 19 and the rear side edge of a recessed part 25a is engaged with a head moving lever 12 to revolve said lever 12 to a counterclockwise direction and a printing head 10 is retracted from a platen 13. Then, paper 14 is set between upper and lower paper guide plates 15, 16. Thereafter, when the paper setting lever 22 is further forwardly pushed down from a neutral position, the link 25 is horizontally slid to a rearward direction and the movable roller 20 is raised by the inclined edge 25b and the front side edge of a recessed part 25b is engaged with a moving lever 22 to revolve said lever to the clockwise direction and the printing head 10 advances toward the platen 13.

Description

【発明の詳細な説明】 技夏光更 本発明は、ワイヤインパクト型プリンタやサーマル型プ
リンタ等のプリンタ、あるいはプロッタやタイプライタ
などの印字装置において、印字ヘッドとプラテン間のギ
ャップを用紙の厚さに応じた適正な間隔に調整する印字
ベッドギャップ調整機構に関するものである。
Detailed Description of the Invention The present invention is a printer such as a wire impact printer or a thermal printer, or a printing device such as a plotter or typewriter. The present invention relates to a printing bed gap adjustment mechanism that adjusts the printing bed gap to an appropriate spacing according to the printing conditions.

丈米亙嵐 上記のような印字装置において印字品質は印字ヘッドの
先端と用紙面までの距離に大きく左右される。従来の印
字ヘッドギャップ調整機構は、ヘッド移動レバー(コピ
ーコントロールレバー)のマニュアル操作で印字ヘッド
がプラテンに対し前後動する構成とし、オペレータが印
字品質を見てヘッド移動レバーの回動量を判断してマニ
ュアル調整していた。
In a printing device such as the one described above, the print quality is greatly influenced by the distance between the tip of the print head and the paper surface. In the conventional print head gap adjustment mechanism, the print head is moved back and forth relative to the platen by manual operation of the head movement lever (copy control lever), and the operator judges the amount of rotation of the head movement lever based on the print quality. It was manually adjusted.

しかし、これによると実際に印字開始をしてから用紙の
印字面を目視確認しなければならず、1枚目が印字不良
となる場合があり、また印字ヘッドの能力を十分に引き
出せる位置で印字することが難しく、しかも調整も面倒
でオペレータに負担がかかり、用紙交換時は特に注意を
要していた。
However, according to this method, it is necessary to visually check the printing surface of the paper after actually starting printing, which may result in poor printing on the first sheet, and also to ensure that the print head is not printed at a position that maximizes its capabilities. It was difficult to adjust the paper, and the adjustment was troublesome, placing a burden on the operator, and requiring special care when replacing paper.

目     的 本発明の目的は、印字ヘッドギャップを、レバーのワン
タッチ操作で自動的に用紙の厚さに応じた適正な値に容
易にかつ誤差なく調整できるようにすることである。
Purpose An object of the present invention is to enable the print head gap to be automatically and easily adjusted to an appropriate value according to the thickness of paper by one-touch operation of a lever without error.

構   成 本発明による印字ヘッドギャップ調整機構は、その実施
例の対応図である第1図を参照するに、印字ヘッド(1
0)をプラテン(13)に対し前後に移動させることが
できる印字装置において、用紙セットレバ−(22)と
5前記プラテン(13)へ送られる用紙(14)を挟持
してその厚みを検知するためにいずれも硬質の固定体(
19)と可動体(20)とを対向させた用紙厚み検知機
構(21)と、前記用紙セットレバ7 (22)の操作
に伴い前記可動体(20)を前記固定体(19)側へ変
位させながら移動し、該可動体(20)が用紙(14)
を介して固定体(19)に押し付けられたとき停止し、
その移動量だけ前記印字ヘッド(10)を前記プラテン
(13)側へ移動させるリンク機構(25)とを備えた
ものである。
Structure: The print head gap adjustment mechanism according to the present invention is shown in FIG.
In a printing device that can move the paper (0) back and forth with respect to the platen (13), the paper set lever (22) and the paper (14) to be sent to the platen (13) are held between the paper (14) and the paper (14) is detected to detect its thickness. In both cases, a hard fixed body (
19) and a movable body (20) facing each other, and a paper thickness detection mechanism (21) that displaces the movable body (20) toward the fixed body (19) upon operation of the paper set lever 7 (22). The movable body (20) moves while moving the paper (14).
stops when pressed against the fixed body (19) via
The apparatus includes a link mechanism (25) that moves the print head (10) toward the platen (13) by the amount of movement.

以下、本発明をワイヤドツト型インパクトプリンタに適
用した実施例について詳述する。
Hereinafter, an embodiment in which the present invention is applied to a wire dot type impact printer will be described in detail.

第1図において、印字ヘッド(10)はキャリア(11
)上に搭載され、ヘッド移動レバー(12)を時計また
は反時計方向に回動させると、キャリア(11)上にお
いて従来公知の構造でプラテン(13)に対し前後に移
動される。ヘッド移動レバー(12)は、図示しないデ
テント機構等によって設定した角度に保持される。
In FIG. 1, the print head (10) is connected to the carrier (11).
), and when the head moving lever (12) is rotated clockwise or counterclockwise, it is moved back and forth with respect to the platen (13) on the carrier (11) in a conventionally known structure. The head moving lever (12) is held at a set angle by a detent mechanism (not shown) or the like.

プラテン(13)の前側には用紙(14)を案内する上
下の用紙案内板(15)・(16)、プラテン(13)
の下側には前後の用紙押えローラ(17)・(18)が
それぞれ配設されている。下側の用紙案内板(16)の
後側部(16a)はプラテン(13)に沿って湾曲して
おり、上下の用紙案内板(15)・(16)間に挿入さ
れた用紙(14)は、該後側部(16a)に沿って湾曲
しながらプラテン(13)と前後の用紙押えローラ(1
7)・(I8)との間に送り込まれる。
On the front side of the platen (13) are upper and lower paper guide plates (15) and (16) that guide the paper (14), and the platen (13).
Front and rear paper press rollers (17) and (18) are respectively arranged on the lower side. The rear side (16a) of the lower paper guide plate (16) is curved along the platen (13), and the paper (14) inserted between the upper and lower paper guide plates (15) and (16) is curved along the platen (13). The platen (13) and the front and rear paper pressing rollers (1) are curved along the rear side portion (16a).
7) and (I8).

また、プラテン(13)の前側には、固定体である固定
ローラ(19)と可動体である可動ローラ(20)とを
上下に対向させた用紙厚み検知機構(21)が配設され
ている。これら固定ローラ(19)と可動ローラ(20
)とは、いずれも硬質な変形しにくい材質で、固定ロー
ラ(19)は所定位置に回転自在に軸支されているが、
可動ローラ(20)は、回転自在でしがち固定ローラ(
19)と平行のまま上下に移動できるように支承されて
いる。
Further, on the front side of the platen (13), a paper thickness detection mechanism (21) is disposed in which a fixed roller (19) as a fixed body and a movable roller (20) as a movable body are vertically opposed. . These fixed rollers (19) and movable rollers (20
) are all made of a hard material that does not easily deform, and the fixed roller (19) is rotatably supported in a predetermined position.
The movable roller (20) is a rotatable fixed roller (
It is supported so that it can move up and down while remaining parallel to 19).

用紙厚み検知機構(21)のさらに前方に、用紙セット
レバ−(22)が軸(23)によって回動自在に軸支さ
れている。該用紙セットレバ−(22)は、その下端を
スプリング(24)によって下方へ引っ張られ。
Further forward of the paper thickness detection mechanism (21), a paper set lever (22) is rotatably supported by a shaft (23). The lower end of the paper set lever (22) is pulled downward by a spring (24).

垂直になる中立位置に保持される。この用紙セットレバ
−(22)と前記ヘッド移動レバー(12)との間には
リンク機構が設けられている。すなわち、これらレバー
の下端間に、横長のリンク(25)が、その前後の横長
孔(26)・(27)を前後の支持ピン(28)・(2
9)に嵌合させて前後に水平摺動自在に装着されている
。そして、このリンク(25)は、その前端部のピン(
30)を用紙セットレバ−(22)の下端部の縦長孔(
31)と嵌合させ、また後端部に形成された凹部(25
a)にヘッド移動レバー(12)の下端部を受は入れて
いる。リンク(25)の前端部の上辺縁は、前端に向か
って上昇する傾斜縁(25b)となっており、前記可動
ローラ(20)は図示しないスプリングによって下方へ
付勢されているため、この傾斜縁(25b)に常に圧接
する。
It is held in a vertical neutral position. A link mechanism is provided between the paper set lever (22) and the head moving lever (12). That is, between the lower ends of these levers, a horizontally long link (25) connects the front and rear horizontally long holes (26) and (27) with the front and rear support pins (28) and (2).
9) so that it can be horizontally slid back and forth. This link (25) has a pin (
30) at the bottom of the paper set lever (22).
31) and a recess (25) formed at the rear end.
The lower end of the head moving lever (12) is inserted into a). The upper edge of the front end of the link (25) is an inclined edge (25b) that rises toward the front end, and since the movable roller (20) is urged downward by a spring (not shown), this inclination Always press against the edge (25b).

用紙セットレバ−(22)が第1図に示す如く中立位置
に保持されているとき、可動ローラ(20)はリンク(
25)の傾斜縁(25b)に圧接したまま固定ローラ(
19)から所定距離だけ離たれ位置に保持され、またヘ
ッド移動レバー(12)の下端部は凹部(25a)に係
合しないでその内部の中間に位置する。
When the paper set lever (22) is held at the neutral position as shown in FIG.
The fixed roller (25) remains pressed against the inclined edge (25b) of the
19), and the lower end of the head moving lever (12) is not engaged with the recess (25a) but is located in the middle thereof.

この中立位置より第2図に示す如く用紙セットレバー(
22)を摘んで後方に倒すと、リンク(25)が前方へ
水平摺動されるため、可動ローラ(20)が傾斜m (
25b)に圧接したまま下方へ移動して固定ローラ(1
9)との間隔を拡げるとともに、凹部(25a)の後側
縁がヘッド移動レバー(12)と係合して該レバーが反
時計方向に回動され、印字ヘッド(lO)がプラテン(
13)に対し後退する。そこで、用紙(14)を上下の
用紙案内板(15)・(16)間に挿入する。
From this neutral position, move the paper set lever (
22) and tilt it backward, the link (25) slides horizontally forward, causing the movable roller (20) to tilt m (
25b) and move it downward while being in pressure contact with the fixed roller (1
9), the rear edge of the recess (25a) engages with the head moving lever (12), the lever is rotated counterclockwise, and the print head (lO) moves toward the platen (12).
13) Retreat against. Then, the paper (14) is inserted between the upper and lower paper guide plates (15) and (16).

この後、第3図に示す如く用紙セットレバ−(22)を
中立位置よりさらに前方へ倒すと、リンク(25)が後
方へ水平摺動されるため、その傾斜部(25b)によっ
て可動ローラ(20)が持、ち上げられるとともに、凹
部(25b)の前側縁がヘッド移動レバー(12)と係
合して該レバーが時計方向に回動され、印字ヘッド(1
0)がプラテン(13)に向かって前進する。
After that, as shown in FIG. 3, when the paper set lever (22) is tilted further forward from the neutral position, the link (25) is horizontally slid backward, so that the movable roller (2 ) is lifted up, the front edge of the recess (25b) engages with the head moving lever (12), and the lever is rotated clockwise, causing the print head (1
0) advances toward the platen (13).

そして、可動ローラ(20)が用紙(14)を介して固
定ローラ(19)に押し付けられたところでリンク(2
5)の摺動は停止する。したがって、ヘッド移動レバー
(12)は、用紙(14)の厚さに応じた量だけ回動さ
れる。固定ローラ(19)と可動ローラ(20)とはい
ずれも硬質であるため、可動ローラ(20)の停止位置
は正確に決まる。
Then, when the movable roller (20) is pressed against the fixed roller (19) via the paper (14), the link (2
5) Sliding stops. Therefore, the head moving lever (12) is rotated by an amount corresponding to the thickness of the paper (14). Since both the fixed roller (19) and the movable roller (20) are hard, the stopping position of the movable roller (20) is accurately determined.

この後、用紙セットレバ−(22)を解放すると、第4
図に示す如く該レバー(22)およびリンク(25)は
スプリング(14)によって中立位置に自動的に復帰さ
れる。しかし、ヘッド移動レバー(12)はデテント機
構によって回動した位置に保持されるため、印字ヘッド
(10)はプラテン(13)に対して用紙(14)の厚
さに応じた適正なギャップを保持される。このとき、可
動ローラ(20)は用紙(14)から離れ、該用紙(1
4)への印字はこの状態で行われる。
After this, when the paper set lever (22) is released, the fourth
As shown in the figure, the lever (22) and link (25) are automatically returned to the neutral position by the spring (14). However, since the head moving lever (12) is held in a rotated position by the detent mechanism, the print head (10) maintains an appropriate gap relative to the platen (13) depending on the thickness of the paper (14). be done. At this time, the movable roller (20) separates from the paper (14) and the movable roller (20) separates from the paper (14).
4) is printed in this state.

なお、用紙厚み検知機構(21)の固定体としては固定
板でもよく、また可動体もローラに限らない。
Note that the fixed body of the paper thickness detection mechanism (21) may be a fixed plate, and the movable body is not limited to a roller.

効   果 以上述べたように、本発明によれば、用紙セットレバ−
のワンタッチ操作によって印字ヘッドの用紙の厚さに応
じた量だけ移動させ、自動的に適正な印字ヘッドギャッ
プを決めることができる。
Effects As described above, according to the present invention, the paper set lever
With one-touch operation, the print head can be moved by an amount that corresponds to the thickness of the paper, and the appropriate print head gap can be automatically determined.

用紙厚み検知機構の固定体と可動体とはいずれも硬質で
あるため、用紙厚み検知状態でこれら固定体と可動体と
が変形することはなく、その検知は正確に行われる。
Since both the fixed body and the movable body of the paper thickness detection mechanism are hard, the fixed body and the movable body do not deform in the paper thickness detection state, and the detection is performed accurately.

また、可動体は、通常は固定体から離れる位置に保持さ
れるため、印字状態では用紙のジャムの発生は回避され
る。
Furthermore, since the movable body is normally held at a position away from the fixed body, jamming of paper is avoided during printing.

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

第1図ないし第4図は本発明の一実施例のそれぞれ異な
る状態の側面図で、第1図は中立状態、第2図は用紙挿
入状態、第3図は用紙厚み検知状態、第4図は印字状態
である。 (10)・・・・・・・・・印字ヘッド(13)・・・
・・・・・・プラテン (14)・・・・・・・・・用紙 (19)・・・・・・・・・固定ローラ(固定体)(2
0)・・・・・・・・可動ローラ(可動体)(21)・
・・・・・・・・用紙厚み検知機構(22)・・・・・
・・・・用紙セットレバ−(25)・・・・・・・・・
リンク (リンク機構)第2図
1 to 4 are side views of an embodiment of the present invention in different states, where FIG. 1 is a neutral state, FIG. 2 is a paper inserted state, FIG. 3 is a paper thickness detection state, and FIG. 4 is a side view of an embodiment of the present invention. is in printing condition. (10)...Print head (13)...
...Platen (14) ...Paper (19) ...Fixed roller (fixed body) (2
0)...Movable roller (movable body) (21)
...Paper thickness detection mechanism (22)...
...Paper set lever (25)...
Link (link mechanism) Figure 2

Claims (1)

【特許請求の範囲】 1、印字ヘッドをプラテンに対し前後に移動させること
ができる印字装置において、用紙セットレバーと、前記
プラテンへ送られる用紙を挟持してその厚みを検知する
ためにいずれも硬質の固定体と可動体とを対向させた用
紙厚み検知機構と、前記用紙セットレバーの操作に伴い
前記可動体を前記固定体側へ変位させながら移動し、該
可動体が用紙を介して固定体に押し付けられたとき停止
し、その移動量だけ前記印字ヘッドを前記プラテン側へ
移動させるリンク機構とを備えたことを特徴とする印字
装置の印字ヘッドギャップ調整機構。 2、前記用紙厚み検知機構の可動体が通常は固定体から
離れる位置に保持されている前記特許請求の範囲第1項
に記載の印字装置の印字ヘッドギャップ調整機構。 3、前記可動体が可動ローラで前記固定体が固定ローラ
または固定板である前記特許請求の範囲第1項に記載の
印字装置の印字ヘッドギャップ調整機構。
[Claims] 1. In a printing device in which the print head can be moved back and forth with respect to the platen, a paper set lever and a paper set lever, both of which are rigid in order to clamp the paper sent to the platen and detect its thickness, are used. A paper thickness detection mechanism includes a fixed body and a movable body facing each other, and when the paper set lever is operated, the movable body moves while being displaced toward the fixed body, and the movable body contacts the fixed body through the paper. A print head gap adjustment mechanism for a printing device, comprising a link mechanism that stops when pressed and moves the print head toward the platen by the amount of movement thereof. 2. The print head gap adjustment mechanism of the printing device according to claim 1, wherein the movable body of the paper thickness detection mechanism is normally held at a position away from the fixed body. 3. A print head gap adjustment mechanism for a printing device according to claim 1, wherein the movable body is a movable roller and the fixed body is a fixed roller or a fixed plate.
JP25938085A 1985-11-19 1985-11-19 Mechanism for adjusting gap of printing head or printer Pending JPS62119076A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25938085A JPS62119076A (en) 1985-11-19 1985-11-19 Mechanism for adjusting gap of printing head or printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25938085A JPS62119076A (en) 1985-11-19 1985-11-19 Mechanism for adjusting gap of printing head or printer

Publications (1)

Publication Number Publication Date
JPS62119076A true JPS62119076A (en) 1987-05-30

Family

ID=17333325

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25938085A Pending JPS62119076A (en) 1985-11-19 1985-11-19 Mechanism for adjusting gap of printing head or printer

Country Status (1)

Country Link
JP (1) JPS62119076A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5032034A (en) * 1987-09-09 1991-07-16 Mannesmann Aktiengesellschaft Support and positioning device for axles of office machines such as printers
US5411339A (en) * 1993-12-09 1995-05-02 Kroy, Inc. Portable printer and cartridge therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5032034A (en) * 1987-09-09 1991-07-16 Mannesmann Aktiengesellschaft Support and positioning device for axles of office machines such as printers
US5411339A (en) * 1993-12-09 1995-05-02 Kroy, Inc. Portable printer and cartridge therefor
US5533818A (en) * 1993-12-09 1996-07-09 Kroy, Inc. Tape cartridge for a printing device

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