JP2003063685A - Spring installation device, and recording device provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and quickly install a torsion coil spring to energize a carrying driver roller holder. SOLUTION: For a carrying unit frame 61, a lower end part is bent forward of a printer to form a bent part 61a. In the bent part 61a, a coil holding part 61b protruded upward to form a semi-circular form in a side view is formed. The torsion coil spring 70 energizes the carrying follower roller holder 64 provided to be rotatable around rotation shafts 64a and 64a in such a direction that the carrying driver roller 63 is pressed to a carrying drive roller 62. It is inserted between the bent part 61a and the carrying follower roller holder 64 from the back side of the printer, so that a coil part 70a is engaged with the coil holding part 61a from the underside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyance drive roller that is driven to rotate and that conveys a recording material, a conveyance driven roller that rotates by being pressed against the conveyance drive roller, and a conveyance driven roller. In a recording device including a transport driven roller holder that axially supports, a frame member provided with the transport driven roller holder, and a torsion coil spring that biases the transport driven roller holder, the torsion coil spring is provided on the frame member. The present invention relates to a spring mounting device for mounting. The present invention also relates to a recording device including the spring mounting device.

[0002]

2. Description of the Related Art A recording apparatus typified by a fax machine, a printer, etc., includes a rotatably driven conveyance driving roller for conveying a recording material to a recording section for recording the recording material at a constant pitch.
A transport driven roller that is pressed against the transport driving roller to rotate, a transport driven roller holder that rotatably supports the transport driven roller, and a plate-shaped member that is long in the width direction of the recording material. A frame member provided with the transport driven roller holder, and one end of the frame member biases the transport driven roller holder from above, and the other end of the frame member is locked by a spring locking portion provided on the frame member. Some of them include a roller holder and a torsion coil spring that urges the roller driven roller to rotate in a direction in which the carrier driven roller comes into pressure contact with the carrier driving roller.

In such a recording apparatus, the torsion coil spring is conventionally provided by a spring mounting device as shown in FIG. Here, FIG. 10 is a perspective view of a transport driven roller holder 200 according to the related art. Figure 10
In FIG. 2, reference numeral 202 denotes a conveyance driving roller which is rotationally driven, reference numerals 201 and 201 denote conveyance driven rollers which are rotated by being pressed against the conveyance driving roller 202, and reference numeral 200 pivotally supports the conveyance driven rollers 201 and 201. Reference numeral 203 denotes a transport driven roller holder, reference numeral 203 denotes a frame member which is a base of a recording apparatus according to a related art (not shown) to which the transport driven roller holder 200 is attached, and reference numeral 204 denotes a torsion coil spring for urging the transport driven roller holder 200. Is shown.

In FIG. 10, a horizontal bending portion 2 is provided at a lower end portion of a frame member 203 which is erected parallel to a vertical surface.
03b, 203b and protrusions 203c, 203c are formed, and the transport driven roller holder 200 includes the bent portions 203b, 203b and the protrusions 203c, 203c.
It is rotatably provided by a rotating shaft 205 supported by and the torsion driven coil springs 204 urge the conveyance driven rollers 201, 201 to rotate in a direction in which they are pressed against the conveyance driving roller 202.

[0005]

The torsion coil spring 204 is attached as follows. That is, the rotary shaft 205 is attached to the transport driven roller holder 200 while inserting the coil portion 204a, and thereby the torsion coil spring 204 is attached to the transport driven roller holder 200. Next, the rotary shaft 205 is bent into the bent portions 203b and 203.
b and the projections 203c, 203c are pivotally supported, and one end 204b of the torsion coil spring 204 is connected to the frame member 2
03 is engaged with a spring engaging portion 203a provided on the No. 03. As described above, in the work of attaching the torsion coil spring 204, it is necessary to insert the rotating shaft 205 into the coil portion 204a in advance, which makes the work complicated.

Therefore, the present invention has been made in view of such a situation, and an object thereof is to make it possible to more easily and quickly attach a torsion coil spring for urging a conveyance driven roller holder.

[0007]

In order to solve the above-mentioned problems, the spring mounting device according to the first aspect of the present invention rotates the recording material by conveying the recording material at a constant pitch to a recording portion which records on the recording material. A driven conveyance driving roller, a conveyance driven roller which is rotated by being pressed against the conveyance driving roller, a conveyance driven roller holder which rotatably supports the conveyance driven roller, and a recording material. A frame member, which is a plate-like member long in the width direction, on which the transport driven roller holder is provided, one end biases the transport driven roller holder from above, and the other end hooks on a spring hook portion provided on the frame member. A torsion coil spring that biases the transport driven roller holder to rotate in a direction in which the transport driven roller comes into pressure contact with the transport driving roller by stopping the transport driven roller holder. Is a spring attachment device for attaching the coil portion to the frame member, and a coil holding portion for holding the coil portion, which has a concave shape with which an upper portion of the coil portion of the torsion coil spring fits, is provided above the transport driven roller holder. , Inserting the torsion coil spring from the front side or the rear side of the recording apparatus between the conveyance driven roller holder and the coil holding portion, and urging the conveyance driven roller holder from above by one end of the torsion coil spring. Meanwhile, the coil portion is fitted to the coil holding portion from below, and the other end of the torsion coil spring is hooked on the spring hooking portion so that the torsion coil spring is attached. To do.

According to the first aspect of the present invention, the torsion coil spring for urging the transport driven roller holder is a coil holding portion for holding the coil portion, which has a concave shape to fit the upper portion of the coil portion. It is attached to the frame member by fitting from below. Therefore, when the torsion coil spring is attached, it is not necessary to insert the rotary shaft into the coil portion of the torsion coil spring, and thus the torsion coil spring for urging the conveyance driven roller holder can be attached more easily and quickly. Is possible.

According to a second aspect of the present invention, in the spring mounting apparatus according to the first aspect, the lower portion of the frame member which is erected parallel to the vertical surface is bent toward the front side of the recording device, and the coil holding portion is provided. Is formed integrally with the frame member by being formed in the bent portion.

According to the second aspect of the present invention, the lower portion of the frame member erected parallel to the vertical surface is bent toward the front side of the recording device, and the coil holding portion is bent. Since it is provided integrally with the frame member by being formed in the open portion, it is therefore possible to reduce the cost without having to separately provide the coil holding portion.

According to a third aspect of the present invention, there is provided a recording apparatus which conveys a recording material to a recording section for recording on the recording material at a constant pitch, and a rotationally driven conveyance driving roller and a pressing contact roller. The driven follower roller holder, which is composed of a conveyer driven roller which is driven to rotate by rotation, a rotatably provided conveyer driven roller holder which rotatably supports the conveyer driven roller, and a plate-like member which is long in the width direction of the recording material. And a frame member provided with, one end biases the transport driven roller holder from above, and the other end latches on a spring locking portion provided on the frame member, thereby moving the transport driven roller holder to the transport driven roller holder. A torsion coil spring that urges a roller to rotate in a direction in which the roller comes into pressure contact with the conveyance drive roller, wherein the torsion coil spring is a recording device.
It is characterized by being attached by the spring attachment device according to any one of the items.

According to the invention of claim 3 of the present application, in the recording apparatus for recording on a recording material, the torsion coil spring for urging the conveyance driven roller holder is the spring mounting device of claim 1 or 2. Since it is attached by the above, it is possible to obtain the same effect as the invention described in claim 1 or 2 of the present application.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. <Structure of Apparatus Main Body of Inkjet Printer> Hereinafter, with reference to FIGS. 1 to 4, one embodiment of the present invention will be described.
The configuration of the apparatus main body of the inkjet printer as the "recording apparatus" will be described. Here, FIG. 1 shows the inkjet printer (hereinafter abbreviated as “printer”) 10
2 is an external perspective view of the apparatus main body of FIG. 0, FIG. 2 is the same exploded perspective view, FIG. 3 is the same side sectional view, and FIG. 4 is the same front view.

In FIG. 1 and FIG. 2, the printer 100 has a main body divided into a plurality of units, and the plurality of units are combined to form a main body of the printer. In the figure, reference numeral 1 is a paper feeding unit as a paper feeding device capable of feeding a paper P (see FIG. 3) as a recording material or roll paper (not shown), and reference numeral 20 is an inkjet recording head 24 (see FIG. 3)), a carriage unit including a carriage 22 having a carriage 22 having a reference numeral 60, a conveyance unit 60 for conveying a recording material, and a reference numeral 80 an ink system unit for performing maintenance of the inkjet recording head 24. Is divided into these four units as shown in FIG.
It is constructed by combining two units as shown in FIG. Incidentally, in the present embodiment, the carriage unit 20 and the ink system unit 80 are respectively the upper side and the right side of the transport unit 60 (the right side in FIG. 4).
And the paper feeding unit 1 is connected to the carriage unit 20.
The four units are configured to be united by connecting to the back side of the.

Next, referring to FIG. 3, the printer 100
The paper transporting route will be described. In addition, in the following, FIG.
The left side (rear side of the printer 100) is referred to as “upstream side”, and the right side of FIG. 3 (front side of the printer 100) is referred to as downstream side. The printer 100 is provided with a hopper 6 on the upstream side, and the sheets P as cut sheets are accumulated and stored on the hopper 6 in an inclined posture. The hopper 6 is rotatably provided in a clockwise direction and a counterclockwise direction in FIG. It is designed to be pressed and separated. Further, the hopper 6 is provided with a movable guide 4 that can slide in the width direction of the paper P (see FIG. 1), and a fixed guide 5 (see FIG. 1).
(See reference), the side edge of the accumulated paper P is guided.
Then, the topmost one of the accumulated sheets P is the hopper 6
Performs a pressure contact operation with respect to the paper feed roller 3, and in the pressure contact state, the paper feed roller 3 rotates and is fed to the downstream side. The paper feed roller 3 has a substantially D-shape when viewed from the side, and is rotated when the rotation shaft 3a is driven to rotate. The paper feed roller 3 is controlled so that the flat portion thereof faces the paper P during the printing operation (the state of FIG. 3), thereby preventing the paper P from being conveyed.

Next, a paper guide 67 as a plate is provided substantially horizontally below the paper feed roller 3, and the front end of the paper P fed out by the paper feed roller 3 is provided in the paper guide 67.
It obliquely abuts and is smoothly guided to the downstream side. The transport drive roller 62 that is rotationally driven downstream from the paper guide 67.
And the transport driven roller 6 that is in pressure contact with the transport drive roller 62.
3 is provided, the sheet P is nipped between the conveyance driving roller 62 and the conveyance driven roller 63, and is conveyed to the downstream side at a constant pitch.

The transport driven roller 63 is rotatably supported on the downstream side of the transport driven roller holder 64, and the transport driven roller holder 64 rotates in the clockwise direction and the counterclockwise direction in FIG. 3 about the rotation shaft 64a. A torsion coil spring 70 (see FIG. 7) that is provided so that it can be rotated by a torsion coil spring 70 (see FIG. 7) is rotated in a direction in which the conveyance driven roller 63 is constantly in pressure contact with the conveyance driving roller 62 (clockwise direction in FIG. 3). Being energized. The transport drive roller 62 is composed of a rotary shaft that is long in the main scanning direction. Therefore, in the present embodiment, the transport drive roller 62 and the transport drive roller 62 are provided.
Is the same as the rotation axis of. Further, in the present embodiment, four transport driven roller holders 64 are arranged along the axial direction of the transport driving roller 62, and one transport driven roller holder 64 is axially supported by two transport driven rollers 63. ing.

Next, in the vicinity of the conveyance driven roller holder 64 located on the most one-digit side (on the right front side in FIG. 2), the sheet detection consisting of the sensor body 36b and the detector 36a for detecting the passage of the sheet P is detected. A container 36 is provided. Detector 36a
Is formed in a substantially V shape in a side view, and is rotatably provided in a clockwise direction and a counterclockwise direction in FIG. 2 around a rotation shaft 36c near the center thereof. The sensor main body portion 36b located above the detector 36a includes a light emitting portion (not shown) and a light receiving portion (not shown) that receives light from the light emitting portion, and the sensor main portion 36b is placed above the rotating shaft 36c of the detector 36a. The rotation operation blocks and passes the light traveling from the light emitting section to the light receiving section. Therefore, as shown in FIG. 3, when the detector 36a is rotated so as to be pushed upward with the passage of the paper P, the upper side of the detector 36a is disengaged from the sensor body 36b, whereby the light receiving portion is in the light receiving state. Therefore, the passage of the paper P is detected.

Then, downstream of the transport drive roller 62,
The platen 66 and the inkjet recording head 24 are arranged so as to face each other vertically. The platen 66 is long in the main scanning direction (see FIG. 2), and is formed of a metal material in the present embodiment, which makes it possible to prevent generation of static electricity as compared with the case where it is formed of a resin material. The paper P can be passed smoothly even at times.

The sheet P conveyed below the ink jet recording head 24 by the rotation of the conveyance driving roller 62 is supported by the platen 66 from below. The inkjet recording head 24 is provided at the bottom of a carriage 22 on which an ink cartridge 23 is mounted, and the carriage 22 has a carriage guide shaft 25 extending in the main scanning direction.
It reciprocates in the main scanning direction while being guided by. In this embodiment, the ink cartridge 23 is composed of four cartridges as shown in FIG. 4, that is, four cartridges in which four color inks (black, yellow, cyan, and magenta) are individually and independently filled. Each can be exchanged independently.

Next, a sheet discharge section of the printer 100 is provided downstream from the ink jet recording head 24, and a sheet discharge drive roller 65, a sheet discharge driven roller 31, and a sheet discharge auxiliary roller 32 are arranged. . A plurality of paper ejection drive rollers 65 are attached in the axial direction of the paper ejection drive roller shaft 65a that is rotationally driven (see FIG. 4), and the paper ejection driven roller holder 3
The paper discharge driven roller 31 pivotally supported by 1a is provided so as to be driven to rotate by being lightly pressed against the paper discharge drive roller 65. Therefore, the paper P printed by the inkjet recording head 24 is rotated in a state where it is nipped by the paper ejection drive roller 65 and the paper ejection driven roller 31, so that the paper ejection direction (FIG. Three
Is discharged in the direction of arrow). The paper ejection auxiliary roller 32 pivotally supported by the paper ejection auxiliary roller holder 32a is provided on the slightly upstream side of the paper ejection driven roller 31, and presses the paper P slightly downward from the platen 66 of the paper P. Lifting is prevented and thus the distance between the paper P and the inkjet recording head 24 is regulated.

The hopper 6, the movable guide 4, the fixed guide 5, and the paper feed roller 3 described above are provided in the above-mentioned paper feed unit 1 shown in FIGS. 1 and 2. As shown in FIG. 2, the sheet feeding unit 1 includes a mounting portion right 2a and a mounting portion left 2 which are vertically arranged on both sides of a hopper 6 and have a substantially columnar shape.
The base of the paper feeding unit frame 2 is provided with a rotary shaft 3a of the hopper 6 and the paper feeding roller 3.
Etc. are provided in the paper feeding unit frame 2.
Then, the paper feeding unit 1 includes the mounting portion 2a and the mounting portion 2b.
Is connected to the back side of the carriage unit 20 at the upper part of the.

Next, the paper guide 67 and the conveyance drive roller 6
2, transport driven roller holder 64, paper ejection drive roller shaft 65
a is provided in the transport unit 60 shown in FIGS. 1 and 2. As shown in FIG. 2, the transport unit 60 includes a transport unit frame 61 having a substantially U-shaped plan view as a base body, a power supply unit 68 that is a power supply unit of the printer 100 at the rear, and a paper discharge at the front. The drive roller shaft 65a is attached to the transport drive roller 62 in the middle of the main body.
Further, a platen 66 is provided in the upper front part, and a transport driven roller holder 64 is provided in the middle upper part. In the lower left part of the transport unit 60, a drive that serves as a common drive source for the paper feed roller 3, the transport drive roller 62, the paper discharge drive roller 65, a pump device 82 described later, and the blade unit 84. A motor 69 (see FIG. 4) is provided. Power transmission from the drive motor 69 to the paper feed roller 3, the transport drive roller 64, and the paper discharge drive roller 65 is performed by a power transmission device 50, which will be described later, provided on the left side surface of the transport unit 60. The power transmission to the pump device 82 and the blade unit 84 provided on the right side surface of the paper is carried out via the paper ejection drive roller shaft 65a, and a power transmission device (gear device not shown) provided at the right end of the paper ejection drive roller shaft 65a. ).

Connected to the right side of the transport unit 60,
The ink system unit 80 as a maintenance means of the inkjet recording head 24 includes a frame 81, which is connected to the right side surface of the transport unit frame 61 and serves as a base of the unit, as shown in FIG.
Further, a cap device 83, a pump device 82, and a blade unit 84 are provided. The cap device 83 protects the nozzle surface (not shown) by capping the inkjet recording head 24 when the carriage 22 moves to the home position (in the area a _{1 in} FIG. 4), and the pump device 82 is in the cap state. A negative pressure is supplied to the cap device 83 to suck ink from the nozzle openings of the inkjet recording head 24. Further, the blade unit 84 is used for the carriage 22.
Reciprocating region and position across the a position retracted from the reciprocating area have movable, moves to a position crossing the reciprocating area of the carriage 22, and a ₀ region of the carriage 22 is print area (Fig. 4 ) To the home position (Fig. 4
By moving the to a ₁ zone), or by moving in the opposite direction, for cleaning by wiping the nozzle surface of the inkjet recording head 24 (not shown).

The carriage guide shaft 25 and the paper detector 36 are provided in the carriage unit 20. As shown in FIG. 2, the carriage unit 20 includes a main frame 21a, a side frame right 21b and a side frame left 21c that are erected on both sides of the main frame 21a. 25 is pivotally supported.

Further, as shown in FIG. 4, the carriage unit 20 is provided with a carriage motor 27 on the rear surface on the left side of the unit, and a drive pulley 28 is attached to the carriage motor 27. A driven pulley 29 is provided on the right side of the unit, a carriage belt 26 is hung between the drive pulley 28 and the driven pulley 29, and a part of the carriage belt 26 is fixed to the carriage 22. . Therefore, the carriage 22 reciprocates in the main scanning direction (left and right direction in FIG. 4) by the rotation of the carriage motor 27.

Although the paper discharge frame 30 is attached to the carriage unit 20 side in FIG. 2, the paper discharge frame 30 can be attached to the carriage unit 20 side or the transport unit 60 side. It is possible to belong to either side. The above is the configuration of the apparatus main body of the printer 100, and the printer 100 becomes movable by combining and connecting the four units.

<Structure of Spring Attachment Device> Next, the attachment device of the torsion coil spring 70 for urging the above-mentioned conveyance driven roller holder 64 will be described in detail with reference to FIGS. 5 to 9. 5 to 8 are partially enlarged perspective views of the transport unit 60, FIGS. 5 and 7 are views taken in the direction of arrow x in FIG. 2, and FIGS. 6 and 8 are views taken in the direction of arrow y in FIG. The procedure for attaching the torsion coil spring 70 is shown. 9A and 9B show the transport unit frame 61.
3 is a side cross-sectional view (partially enlarged view) of FIG. Here, the printer 100 according to the present embodiment includes four transport driven roller holders 64 in the axial direction of the transport driving roller 62 as described above, but in the following, the most 80-digit side (left side in FIG. 4).
The torsion coil spring 70 for urging the transport driven roller holder 64 provided in the above will be described as an example. The transport driven roller holder 64 provided on the most 80-digit side is shown in FIG.
As shown in, a paper guide portion 71 for guiding the side end portion of the paper P to the downstream side is additionally provided. The paper guide portion 71 has substantially the same shape as the downstream side portion of the transport driven roller holder 64 in a side view (see FIG. 3).

First, as shown in FIG. 5, in the transport unit frame 61 which is erected parallel to the vertical surface, the portion to which the transport driven roller holder 64 is attached is designated by reference numeral 61a.
As shown in FIG. 5, the conveying driven roller holder 64 is bent by the bent portion 61a toward the downstream side (right side in FIG. 9), and the coil portion 70a of the torsion coil spring 70 is held. ing.

More specifically, as shown in FIG. 9, the torsion coil spring 70 includes a coil portion 70a, a frame hooking end 70b extending upward from the coil portion 70a and having a substantially V-shaped side view. A holder engaging end 7 that forms a substantially V-shaped side view slightly more gently than the frame hooking end 60b.
0c, and the frame engaging end 70b engages with a hook-shaped hook portion 72 (see FIG. 6) as a "spring engaging portion" formed on the conveying unit frame 61, and the holder engaging end 70c conveys the driven surface. It engages with the upper surface of the downstream end (the right end in FIG. 9) of the roller holder 64, thereby urging the transport driven roller holder 64 to rotate in the direction in which the transport driven roller 63 presses the transport driving roller 62. (Clockwise in FIG. 9).

On the other hand, the bent portion 61a is formed with a coil holding portion 61b having a semicircular shape in a side view, which is convex upward as shown in FIG. 9, and the coil holding portion 61b is provided with As shown in FIG. 9B, the torsion coil spring 70
The coil portion 70a is fitted from below, so that the torsion coil spring 70 is held. Also,
A slit 61d is formed between the hook-shaped hook portion 72 and the coil holding portion 61b as shown in FIGS. 5 and 6, and the coil portion 70a is held by the coil holding portion 61b by the slit 61d. , Frame hook 70
It is possible to hook b on the hook-shaped hook portion 72. In addition, the bent portions 61a have concave portions 61c, 6
1c is formed, and due to the recesses 61c, 61c,
A rotary shaft 64a formed on the transport driven roller holder 64,
64a is pivotally supported.

The procedure for mounting the torsion coil spring 70 will be described below with reference to FIGS. 5 to 8 and 9. First, as shown in FIGS. 5, 6 and 9A, after the transport driven roller holder 64 is attached to the bent portion 61a, the rear side of the transport unit frame 61 (downstream side: FIG. 9).
From the left side) to the front side. Torsion coil spring 7
0 is inserted between the transport driven roller holder 64 and the bent portion 61a, and the downstream end portion (the right end portion in FIG. 9) of the transport driven roller holder 64 by the holder engaging end 70c.
The coil portion 70a is fitted into the coil holding portion 61b from below while urging the coil portion from above. Next, the frame hooking end 70b of the torsion coil spring 70 is hooked on the hook-shaped hook portion 72, whereby the torsion coil spring 70 is attached. The state in which the torsion coil spring 70 is attached is the state shown in FIGS. 7, 8 and 9 (B).

That is, the torsion coil spring 70 for urging the conveyance driven roller holder 64 is fitted from below into the concave coil holding portion 61b into which the upper portion of the coil portion 70a is fitted, so that the conveyance unit frame 61 is formed. Attached to. Therefore, the work of attaching the torsion coil spring 70 is
It suffices to insert the torsion coil spring 70 from the rear side of the transport unit frame 61 and hook it on the hook-shaped hook portion 72, and there is no need to insert the rotating shaft into the coil portion 70a. The coil spring 70 can be attached very simply and quickly.

In the present embodiment, the coil portion 70
The coil holding portion 61b holding a is the frame member 61.
Since it is provided integrally with the coil holding portion 6,
It is not necessary to provide 1b as a separate member, and the coil holding portion 61b can be arranged at low cost. Further, in the present embodiment, the torsion coil spring 70 is inserted from the rear side of the transport unit frame 61, but it may be inserted from the front side of the transport unit frame 61. Further, although the coil holding portion 61b holding the coil portion 70a has a semicircular shape in a side view in the present embodiment, the coil holding portion 61b is not limited to this shape and holds the coil portion 70a so as not to easily come off. If,
It may have any shape. In this case, as in the present embodiment, the spring force of the torsion coil spring 70 is used to bring the coil portion 70a into the state in which the coil holding portion 61b is pressed from below, and, for example, a fitting such as a snap fit. The coil portion 70a may be fitted so as not to drop downward from the coil holding portion 61b by using a means.

[0035]

As described above, according to the present invention, the torsion coil spring for urging the conveyance driven roller holder has a concave shape into which the upper portion of the coil portion fits, and the coil holding the coil portion. It is attached to the frame member by fitting the holding portion from below. Therefore, when the torsion coil spring is attached, it is not necessary to insert the rotary shaft into the coil portion of the torsion coil spring, and thus the torsion coil spring for urging the conveyance driven roller holder can be attached more easily and quickly. Is possible.

[Brief description of drawings]

FIG. 1 is an external perspective view of an apparatus main body of an inkjet printer according to the present invention.

FIG. 2 is an exploded perspective view of the apparatus body of the inkjet printer according to the present invention.

FIG. 3 is a side sectional view of the inkjet printer according to the present invention.

FIG. 4 is a front view of the apparatus main body of the inkjet printer according to the present invention.

FIG. 5 is a partially enlarged perspective view (a view in the direction of arrow x in FIG. 2) of a transport unit that constitutes the inkjet printer according to the present invention.

FIG. 6 is a partially enlarged perspective view (a view in the direction of arrow y in FIG. 2) of a transport unit that constitutes the inkjet printer according to the present invention.

FIG. 7 is a partially enlarged perspective view (a view in the direction of arrow x in FIG. 2) of a transport unit that constitutes the inkjet printer according to the present invention.

FIG. 8 is a partially enlarged perspective view (a view in the direction of arrow y in FIG. 2) of the transport unit that constitutes the inkjet printer according to the present invention.

FIG. 9 is a side cross-sectional view (partially enlarged view) of a transport unit frame that constitutes the inkjet printer according to the present invention.

FIG. 10 is a perspective view of a transport driven roller holder showing a spring mounting device according to a conventional technique.

[Explanation of symbols]

1 Paper feeding unit 20 Carriage unit 22 carriage 24 inkjet recording head 60 transport units 61 Transport unit frame 62 Transport drive roller 63 Transport driven roller 64 Transport driven roller holder 70 torsion coil spring 72 Hook-shaped hook 100 inkjet printer P printing paper

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shudai Yamashita             Seiko, 3-3-3 Yamato, Suwa City, Nagano Prefecture             -In Epson Corporation F-term (reference) 2C059 BB03 BB06 BB10 BB13 BB21                 2C060 BC03 BC14 BC22 BC47                 3F049 AA07 CA33 DA12 LA05 LA07                       LB03

Claims (3)

[Claims] 1. A conveyance drive roller which is rotationally driven to convey a recording material to a recording section for recording on a recording material at a constant pitch, and a conveyance driven roller which is driven to rotate by being pressed against the conveyance driving roller. And a rotatably provided transport driven roller holder that rotatably supports the transport driven roller, a frame member that is provided with the transport driven roller holder and that is composed of a plate-like member that is long in the width direction of the recording material, and has one end By biasing the transport driven roller holder from above and engaging the other end with a spring locking portion provided on the frame member, the transport driven roller holder presses the transport driven roller against the transport driving roller. And a torsion coil spring that biases the torsion coil spring to rotate in a direction in which the torsion coil spring is attached to the frame member. A coil holding portion for holding the coil portion, which has a concave shape into which the upper portion of the coil portion is fitted, is provided above the transport driven roller holder, and the torsion coil spring is provided from the front side or the rear side of the recording apparatus. It is inserted between the transport driven roller holder and the coil holding portion, and the coil portion is fitted into the coil holding portion from below while urging the transport driven roller holder from above by one end of the torsion coil spring, A spring mounting device configured to mount the torsion coil spring by hooking the other end of the torsion coil spring to the spring hook portion. 2. The lower portion of the frame member, which is erected parallel to a vertical surface, is bent toward a front side of the recording device, and the coil holding portion is formed in the bent portion. The spring mounting device is characterized in that it is integrally provided with the frame member. 3. A conveyance driving roller which is rotationally driven to convey the recording material to a recording section for recording on the recording material at a constant pitch, and a conveyance driven roller which is driven to rotate by being pressed against the conveyance driving roller. And a rotatably provided transport driven roller holder that rotatably supports the transport driven roller, a frame member that is provided with the transport driven roller holder and that is composed of a plate-like member that is long in the width direction of the recording material, and has one end By biasing the transport driven roller holder from above and engaging the other end with a spring locking portion provided on the frame member, the transport driven roller holder presses the transport driven roller against the transport driving roller. And a torsion coil spring biased to rotate in a rotating direction, wherein the torsion coil spring is attached by the spring attachment device according to claim 1. Recording apparatus characterized by being.