JPH08165043A - Recording device - Google Patents

Abstract

PURPOSE: To scrape off in a groove part a stain of ink or the like sticking to a driven rotary unit by constituting a recording medium feed mechanism, which conveys a recording medium, of a drive rotary unit and the driven rotary unit brought into contact with this drive rotary unit, and forming the groove part in a position corresponding to the driven rotary unit of the drive rotary unit. CONSTITUTION: In a paper discharge part in an ink jet type recorder device, a transmitting roller 40 is brought into contact with a conveying roller 36 and further into contact with a paper discharge roller 41. A spur 42, rotatably driven by the roller 41, is brought into contact with an upper opposed position of the paper discharge roller 41. This spur 42 is formed in a shape of sharpening the point end so as to prevent ink of a stored image from being transferred, preferably. Here in the paper discharge roller 41 serving as an opposed part of the spur 42, a groove part 41a, formed into V shape so as to conform to the point end shape of the spur 42, is formed. In this way, a stain of ink or the like sticking to the spur 42 is scraped off by the V groove 41a, to prevent depositing a stain of ink or the like in the spur 42.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus having a recording medium feeding mechanism for conveying a recording medium recorded by recording means.

[0002]

2. Description of the Related Art Generally, an ink jet type recording apparatus performs recording by ejecting ink from a recording head onto a recording sheet. The recording head can be easily made compact, and high-definition images can be recorded at high speed. It has advantages such as low running cost, low noise due to the non-impact method, and easy recording of color images using multi-color impact.
Above all, a line-type recording apparatus using a line-type recording head in which a large number of ink ejection openings are arranged in the width direction of the recording sheet can further increase the recording speed.

In the above-mentioned ink jet recording apparatus, the recording sheet fed by the sheet feeding means is held by the platen in the recording area, recording is performed by the recording head, and then the sheet discharging means provided on the downstream side in the conveying direction. It is supposed to be discharged by.

FIG. 8 and FIG. 9 show a schematic configuration diagram and an enlarged view of a main part of a conventional ink jet recording apparatus. 8 and 9
At the recording sheet S as a recording medium,
The sheets are stacked on the sheet No. 1 and are fed one by one from the top by the sheet feeding roller 102. The fed recording sheet S is nipped by the conveyance roller 103 and the pinch roller 104, and is conveyed to the recording start position on the platen 105 by the conveyance roller 103 driven by a drive source (not shown).

Reference numeral 106 denotes a recording head, and the carriage 10
The carriage 107 is detachably attached to the carriage 107.
Is rotatably supported by a guide shaft 108 and is movable in a direction orthogonal to the sheet conveying direction. That is, the recording head
While 106 moves in the direction orthogonal to the sheet conveyance direction,
An image is recorded on the recording sheet S.

Reference numeral 109 denotes a paper discharge roller, which is a transmission roller 11
The rotational force of the transport roller 103 is transmitted via 0 and driven. The recording sheet S on which recording is performed as described above is discharged and stored in a discharge tray 112 outside the apparatus by a discharge roller 109 and a spur 111 that is in pressure contact with the discharge roller 109.

[0007]

However, in the above-mentioned conventional ink jet recording apparatus, the recording sheet S after recording is sandwiched between the sheet ejection roller 109 and the spur 111 and ejected, so that the ink is completely discharged. In some cases, the spurs 111 roll on the recording surface that is not dry, and the ink may transfer to the outer periphery of the tip of the spurs 111. Whenever the number of recorded sheets is increased, the ink and paper dust are combined to accumulate on the spurs 111. However, stains such as ink adhered to the spur 111 may adhere to the recording sheet S, and the output image may be stained. Also spurs
In some cases, stains such as ink accumulated on 111 are transferred to the discharge roller 109, and the stains on the discharge roller 109 adhere to the back surface of the recording sheet S and stain the recording sheet S. Furthermore, the spur 61 may not rotate smoothly due to dirt such as accumulated ink and the like, which may cause a jam.

In order to deal with this, in the conventional ink jet recording apparatus, an absorber is provided in a portion of the paper discharge roller where the spurs come into contact, and the ink and the like adhering to the spurs are absorbed and removed by the absorber. However, the workability of incorporating the absorber into the paper discharge roller is poor, and in the case where a large number of spurs are provided in the axial direction of the paper discharge roller, the Since the absorber must be provided on the paper discharge roller, there is a problem that the cost becomes high.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to prevent ink or the like from accumulating on a spur so that a recording sheet does not become dirty.
An object of the present invention is to provide a recording device that can obtain a high-quality output image.

[0010]

A typical constitution of the present invention for achieving the above object is to convey a recording means for recording an image on a recording medium and a recording medium on which the recording is performed. And a recording medium feeding mechanism for driving the recording medium feeding mechanism, wherein the recording medium feeding mechanism has a driving rotating body and at least one driven rotating body that is in contact with the driving rotating body. The body is characterized in that a groove is formed at a corresponding position, and the groove of the drive rotating body and the driven rotating body are in contact with each other.

[0011]

In the above-mentioned structure, the recording medium feeding mechanism for conveying the recording medium on which the recording has been performed includes the driving rotating body,
At least one driven rotary body that abuts on the drive rotor, forms a groove at a position corresponding to the driven rotor of the drive rotor, and contacts the groove of the drive rotor and the driven rotor. Therefore, dirt such as ink adhered to the driven rotating body can be scraped off by the groove formed in the drive rotating body, and it is possible to prevent dirt such as ink from accumulating on the driven rotating body. It will be possible.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a recording apparatus to which the present invention is applied will be specifically described below with reference to the drawings.

[First Embodiment] A first embodiment of the recording apparatus according to the present invention will be described with reference to FIGS. 1 is a perspective view showing the overall configuration of the recording apparatus, FIG. 2 is a front view of the recording apparatus, FIG. 3 is a sectional view of the configuration of the recording apparatus, FIG. 4 is an enlarged view of a main portion near the recording section, and FIG. It is a principal part enlarged view which shows the structure of a paper part. In this embodiment, an ink jet type recording apparatus provided with an automatic paper feeding device is exemplified. As shown in FIGS. 1 to 3, the recording device 1 includes a paper feeding unit 2, a paper feeding unit 3, and a paper ejection unit 3. It comprises a paper unit 4, a carriage unit 5, and a cleaning unit 6. Hereinafter, these will be divided into items and the outline will be sequentially described.

(Paper Feed Unit) The paper feed unit 2 includes a pressure plate 21 on which the recording sheets S are stacked, and a feeding rotary member 22 for feeding the recording sheets S.
Is attached to the base 20. Pressure plate 21
A movable side guide 23 is movably provided on the
The stacking position of the recording sheets S is regulated. In addition, the pressure plate 21
Is rotatable about a rotary shaft 20a coupled to the base 20, and is biased by the feeding rotary body 22 by the biasing force of the pressure plate spring 24. A separation pad 25 made of a material having a large friction coefficient, such as an artificial leather, which prevents double feeding of the recording sheets S is provided at a portion of the pressure plate 21 facing the feeding rotating body 22. Further, the base 20 covers one corner of the recording sheet S, and a separation claw 26 for separating the thin recording sheets (plain paper or the like) S one by one, and a thick recording sheet in which the separation claw 26 cannot be used. Base 20 to separate S (cardboard etc.)
The bank 27 integrally formed with the separation lever 26, the switching lever 28 for switching so that the separation claw 26 operates in the plain paper position and the separation claw 26 does not operate in the thick paper position, and the contact between the pressure plate 21 and the feeding rotary member 22. A release cam 29, etc. for releasing is provided.

In the above construction, since the release cam 29 pushes down the pressure plate 21 to the predetermined position in the standby state, the contact between the pressure plate 21 (the upper recording sheet S) and the feeding rotary member 22 is released. When the driving force of the conveying roller 36 is transmitted to the feeding rotating body 22 and the release cam 29 by a drive transmission system (not shown) such as a gear, the release cam 29 separates from the pressure plate 21, so that the pressure plate 21 The feeding rotating body 22 and the recording sheet S come into contact with each other. Then, the recording sheets S are picked up with the rotation of the feeding rotating body 22, separated one by one by the separating claw 26, and sent to the paper feeding section 3. The feeding rotating body 22 and the release cam 29 rotate until the recording sheet S is fed into the sheet feeding unit 3, and the contact state between the recording sheet S and the feeding rotating body 22 is released again and the feeding roller 22 is in a standby state. The drive force from 36 is disconnected.

(Paper Sending Unit) The paper sending unit 3 has a carrying roller 36 for carrying the recording sheet S and a PE sensor 32. A pinch roller 37, which is driven to rotate, is provided in contact with the conveying roller 36 at an upper position thereof. The pinch roller 37 is held by the pinch roller guide 30.
The pinch roller spring 31 urges the
The conveyance roller 36 is pressed against the conveyance roller 36 to generate a conveyance force for the recording sheet S. Further, an upper guide for guiding the recording sheet S is provided at the entrance of the paper feeding unit 3 where the recording sheet S is conveyed.
33 and a platen 34 are arranged. Also, the upper guide 33
Is provided with a PE sensor lever 35 for transmitting the detection of the front and rear ends of the recording sheet S to the PE sensor 32. Further, a recording head 7 as a recording unit for forming an image based on image information is provided on the downstream side of the conveying roller 36 in the sheet conveying direction.

In the above structure, the recording sheet S fed into the paper feeding section 3 has a platen 34 and a pinch roller guide 30.
And, guided by the upper guide 33, it is sent to the nip portion of the pair of conveying rollers composed of the conveying roller 36 and the pinch roller 37. At this time, the recording sheet S is recorded by the PE sensor lever 35.
The leading edge of the recording sheet S is detected and the recording position of the recording sheet S is obtained. Further, the recording sheet S is conveyed on the platen 34 by rotating the conveying roller pairs 36 and 37 by an LF motor (not shown).

A recording head 7 as the above-mentioned recording means
Is an inkjet type recording head that discharges ink in accordance with a signal to perform recording, and an easily replaceable recording head in which an ink tank is detachably attached is used. The recording head 7 includes an electrothermal converter such as a heater for generating thermal energy for ejecting ink. The ink is film-boiling by the heat energy applied by the electrothermal converter, and the recording head 7 is changed by the pressure change caused by the growth or contraction of the bubbles due to the film boiling.
Ink is ejected from the nozzle (ink ejection port) to form an image on the recording sheet S.

(Carriage Section) The carriage section 5 has a carriage 50 to which the recording head 7 is attached.
The carriage 50 includes a guide shaft 81 for reciprocating scanning in a direction orthogonal to the sheet conveying direction, and a carriage.
It is supported by a guide rail 82 that holds the trailing edge of 50 and maintains the gap between the recording head 7 and the recording sheet S.
The guide shaft 81 and the guide rail 82 are attached to the chassis 8
Attached to. The carriage 50 is driven by a carriage motor 80 attached to the chassis 8 via a timing belt 83. This timing belt
83 is stretched and supported by an idle pulley 84. Further, the carriage 50 includes a flexible board 56 for transmitting a signal from the electric board 9 to the recording head 7.

In the above configuration, when an image is formed on the recording sheet S, the pair of conveying rollers 36 and 37 conveys the recording sheet S to the row position (the position in the sheet conveying direction) where the image is formed, and the carriage motor 80 is used. The carriage 50 is moved to a row position (a position perpendicular to the sheet conveying direction) for forming an image, and the recording head 7 is opposed to the image forming position. Then, the recording head 7 ejects ink toward the recording sheet S in response to a signal from the electric substrate 9 to form an image.

(Cleaning Unit) The cleaning unit 6 is
A pump 60 for cleaning the recording head 7, a cap 61 for suppressing drying of the recording head 7, and a conveyance roller.
It is composed of a drive switching arm 62 for switching the driving force from 36 to the sheet feeding section 2 or the pump 60. In the drive switching arm 62, a planetary gear (not shown) that rotates around the shaft of the transport roller 36 is fixed at a predetermined position except when the paper is fed and cleaned.
No driving force is transmitted to. Further, when the drive switching arm 62 is moved in the direction of arrow A in FIG. 1 by moving the carriage 50, the planetary gear becomes free, so that the planetary gear moves in accordance with the forward / reverse rotation of the transport roller 36, The driving force is transmitted to the sheet feeding unit 2 when the transport roller 36 rotates in the normal direction, and the driving force is transmitted to the pump 60 when the transport roller 36 rotates in the reverse direction.

(Paper Discharging Unit) The paper discharging unit 4 is provided such that the transmission roller 40 is in contact with the conveying roller 36, and the transmission roller 40 is in contact with the paper discharging roller 41. Therefore, the transport roller 36
Is transmitted to the paper ejection roller 41 via the transmission roller 40, and the paper ejection roller 41 is rotationally driven. Also, the discharge roller
A spur 42, which is driven by the roller 41 and rotates, is in contact with an upper facing position of the roller 41. With the above configuration, the recording sheet S on which the image is formed by the carriage unit 5 is ejected by the paper ejection roller.
It is sandwiched between 41 and the spur 42, conveyed, and discharged onto a paper discharge tray (not shown).

Further, the construction and operation of the paper discharge unit 4 according to the present invention will be described in detail with reference to FIGS. 4 and 5. In FIGS. 4 and 5, the paper discharge unit 4 operates as described above, and the spur 42 cooperates with the paper discharge roller 41 to sandwich and discharge the recording sheet S after recording. The ink of the formed image is formed in a shape with a sharp tip so that the ink does not transfer as much as possible. Further, a groove portion 41a (hereinafter, referred to as a "V groove") having a V-shape is formed on the paper discharge roller 41, which is a portion facing the spur 42, so as to match the tip shape of the spur 42.

Further, when the recording sheet S is not sandwiched between the spur 42 and the discharge roller 41, for example, when the recording apparatus 1 is in a standby state, the V groove 41a of the discharge roller 41 and the tip of the spur 42 are formed. 42a and 42a are in contact with each other by the force of the spring 43. The spring 43 is attached to an exterior member (not shown). If the spring pressure is too strong, the tip 42a of the spur 42 may be damaged, or the recording sheet S may be sandwiched between the spur 42 and the discharge roller 41. During this time, the recording sheet S slips into the V groove 41a of the paper discharge roller 41 and the portion thereof becomes wrinkled. Therefore, the pressure is set to an appropriate level so that such a phenomenon does not occur. As a result, the spur 42 moves to the position indicated by the broken line in the drawing when the recording sheet S is nipped by cooperation with the paper discharge roller 41.

When a recording signal is transmitted to the recording apparatus 1 from a computer (not shown) or the like, the feeding rotator 22 of the sheet feeding unit 2 starts feeding the recording sheet S. At this time, the sheet discharging roller 41.
The spur 42 rotates in a state where the V groove 41a and the leading end portion 42a are in contact with each other until the recorded recording sheet S is nipped. When the recording sheet S is nipped, the recording sheet S is conveyed by the spur 42 and the discharge roller 41 that have moved to the broken line position in the figure. Further, after the trailing edge of the recording sheet S is out of the nip between the paper discharge roller 41 and the spur 42, the paper discharge roller pair 41 and the spur 42 are in contact with the V groove 41a and the front end portion 42a for a predetermined time. It is designed to rotate.

With the above structure, the V groove 41a of the paper discharge roller 41 is formed.
When the spur 42 and the front end portion 42a of the spur 42 are in contact with each other and are rotating, dirt such as ink adhering to the spur 42 is discharged.
Since it is scraped off by the V groove 41a, stains such as ink will not be accumulated on the spur 42. Therefore, the recording sheet is not stained and a high-quality output image can be obtained. Further, since the paper discharge roller 41 has a simple structure in which the V groove 41a is formed, the conventional ink absorber is not required and the cost can be reduced.

[Second Embodiment] Next, a recording apparatus according to a second embodiment of the present invention will be described with reference to FIG. Since the configuration and operation of the entire apparatus are the same as those of the above-described embodiment, detailed description will be omitted here. The paper discharge unit, which is a feature of this embodiment, will be described below.

In the paper discharge section 4 according to this embodiment, as shown in FIG. 6, a convex portion 41b is formed in the V groove 41 of the paper discharge roller 41 in the circumferential direction.
Is provided, and the convex portion 41b and the tip end portion 42 of the spur 41 are brought into contact with each other by the force of the spring 43. As a result, the effect of the above-described embodiment is further improved.

[Third Embodiment] Next, a recording apparatus according to a third embodiment of the present invention will be described with reference to FIG. Since the configuration and operation of the entire apparatus are the same as those of the above-described embodiment, detailed description will be omitted here. The paper discharge unit, which is a feature of this embodiment, will be described below.

In the paper discharge section 4 according to this embodiment, as shown in FIG. 7, a rectangular groove 41c is formed in the paper discharge roller 41, and the corner 41d of the groove 41c and the tip of the spur 42 are formed. It is configured so that the spring 42 is brought into contact with 42a. With this, the same effect as that of the above-described embodiment can be obtained.

[0031]

As described above, the paper discharge section for carrying the recorded recording sheet has a paper discharge roller and at least one spur abutting against the paper discharge roller,
A groove is formed at a position corresponding to the spur of the discharge roller,
The groove of the paper discharge roller and the tip of the spur come into contact with each other to rotate, so that when the groove comes into contact with the tip of the spur and rotates, dirt such as ink attached to the spur is discharged. Since it is scraped off by the groove of the roller, dirt such as ink does not accumulate on the spur. Therefore, the recording sheet does not become dirty and a high-quality output image can be obtained. Further, since jamming is less likely to occur, it is possible to provide a highly reliable recording device that can obtain a stable output image. Further, since the paper discharge roller has a simple structure in which the V groove is formed, the ink absorber that has been conventionally required is not required, and the cost can be reduced.

Further, by providing a convex portion in the circumferential direction of the inner wall of the V groove of the paper discharge roller, the above effect is further improved. Further, the same effect as described above can be obtained by forming the groove portion formed in the paper discharge roller into a concave groove.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall configuration of a recording apparatus.

FIG. 2 is a front view of the recording apparatus.

FIG. 3 is a configuration cross-sectional view of the recording apparatus.

FIG. 4 is an enlarged view of a main part near a recording unit.

FIG. 5 is an enlarged view of a main part showing the configuration of a paper discharge unit according to the first embodiment of the present invention.

FIG. 6 is an enlarged view of the essential parts showing the configuration of the paper discharge unit according to the second embodiment of the present invention.

FIG. 7 is an enlarged view of a main part showing the configuration of a paper discharge unit according to the third embodiment of the present invention.

FIG. 8 is a cross-sectional view of a configuration of a conventional recording device.

FIG. 9 is an enlarged view of a main part near a recording unit of a conventional recording device.

[Explanation of symbols]

1 ... Recording device 2 ... Paper feeding unit 3 ... Paper feeding unit 4 ... Paper discharging unit 5 ... Carriage unit 6 ... Cleaning unit 7 ... Recording head 8 ... Chassis 9 ... Electrical board 20 ... Base 20a ... Rotating shaft 21 ... Pressure plate 22 ... Feeding rotary body 23 ... Movable side guide 24 ... Pressure plate spring 25 ... Separation pad 26 ... Separation claw 27 ... Bank 28 ... Switching lever 29 ... Release cam 30 ... Pinch roller guide 31 ... Pinch roller spring 32 ... PE sensor 33 ... Above Guide 34 ... Platen 35 ... PE sensor lever 36 ... Conveying roller 37 ... Pinch roller 40 ... Transmission roller 41 ... Paper ejection roller 41a ... Groove (V groove) 41b ... Convex portion 41c ... Recessed groove 41d ... Corner 42 ... Spur 42a ... Tip 50 ... Carriage 56 ... Flexible substrate 60 ... Pump 61 ... Cap 62 ... Drive switching arm 80 ... Carriage motor 81 ... Guide shaft 82 ... Guide rail 83 ... Timing belt 84 ... Idle pulley

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Haruyuki Yanagi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Makoto Karama 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon (72) Inventor Hiroyuki Kinoshita 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Tan Atming 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Co., Ltd. (72) Inventor Hiroyuki Saito 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Tetsuo Suzuki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (5)

[Claims] 1. A recording apparatus having a recording unit for recording an image on a recording medium and a recording medium feeding mechanism for conveying the recording medium recorded by the recording unit, wherein the recording medium feeding mechanism comprises: A driving rotary body and at least one driven rotary body contacting the driving rotary body; forming a groove at a position corresponding to the driven rotary body of the driving rotary body; A recording apparatus, which is configured to come into contact with a body. 2. The recording apparatus according to claim 1, wherein the groove portion of the drive rotor is a V groove formed in a V shape. 3. The V groove of the driving rotary member is provided with a convex portion in a circumferential direction of an inner wall that abuts the driven rotary member, and the convex portion and the driven rotary member abut. The recording device according to 2. 4. The recording apparatus according to claim 1, wherein the groove portion of the driving rotary member is a concave groove formed in a concave shape, and a corner portion of the concave groove and the driven rotary member are in contact with each other. 5. The recording apparatus according to claim 1, wherein the recording apparatus is an inkjet recording method in which a recording unit ejects ink in accordance with a signal to perform recording.