JPH11115167A - Recording device - Google Patents

Abstract

(57) [Problem] To provide a recording apparatus which can accurately convey a thick recording sheet and does not cause damage to a recording head. When printing is performed on a thick recording sheet, a feeding device for stacking and transporting the recording sheets is rotated at the entrance of the transport path of the recording apparatus to make the transport path of the recording sheet linear, and A mechanism was provided for adjusting the distance between the recording head and the recording sheet to be constant according to the thickness of the recording sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for performing recording by ejecting droplets of ink or the like on a recording sheet.

[0002]

2. Description of the Related Art Hitherto, a recording apparatus has been developed in which the installation path and the operability of the apparatus are improved by forming a conveying path of a recording sheet by bending the path. Such a transport path is called a U-turn path or a J-turn path, and a recording apparatus having such a transport path has become mainstream.

[0003]

However, the transport path of the U-turn path and the J-turn path as described above is not straight, so that it is troublesome to print on a thick recording sheet or the like. A problem arises.

That is, when printing on a thick recording sheet, the recording sheet hardly bends along the conveyance path, so that the recording sheet rubs on the conveyance path and cannot be conveyed accurately, or reaches the recording head. In some cases, the recording cannot be performed on the recording sheet without being performed, or when the conveyance cannot be performed accurately, the recording quality may deteriorate even if the recording is performed. In addition, the recording sheet may have a thickness that changes the distance between the recording head and the recording sheet so that recording may not be performed well, or the recording sheet may contact the recording head and damage the recording head. . Also,
In such a case, a paper jam was caused.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a feeding device for stacking and feeding recording sheets at the entrance of a transport path of a printing device when printing thick recording sheets. , The conveying path of the recording sheet can be made linear, and a mechanism for adjusting an interval corresponding to the thickness of the recording sheet is provided.

[0006] By making the transport path of the recording sheet linear by the mechanism described above, even a thick recording sheet is transported linearly from the entrance to the exit of the transport path, so that the recording sheet can be transported accurately. There is no problem that recording is not performed or recording quality deteriorates. At the same time, by constantly adjusting the interval of the transport path,
Regardless of the thickness of the recording sheet, the recording quality can be kept constant,
The recording head can also be prevented from being damaged.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a sectional view of a recording apparatus according to a first embodiment of the present invention.

First, the recording operation of the recording apparatus P for recording a recording sheet S having a normal thickness will be described.

On the pressure plate 2 of the feeding device 1, a recording sheet S having a normal thickness is stacked.

At this time, the feeding device 1 is in an inclined state (A).
Thus, the recording sheet S is conveyed obliquely into the recording apparatus P.

When a recording command for the recording sheet S is received, the feed roller 3 is rotated by a drive mechanism (not shown), and the rotational force is transmitted through the gears 4, 5, 6, 7, 8, 9 to the feed roller 1.
The pressure plate 2 is transmitted to 0 and rotates clockwise, so that the pressure plate 2 also rises toward the paper feed roller 10 in conjunction with the rotation.

At this time, the recording sheet S having a normal thickness is fed by the feed roller 10 and the separation sheet 11
, The sheet is passed through the guide 12 and is sandwiched between the pinch roller 13 and the feed roller 3, whereby the leading end of the recording sheet is still fed at the print start position.

When the feed roller 10 rotates to the initial position, the photo sensor detects the rotation, and the driving force from the feed roller 3 is cut off to stop.

The switching of the driving force of the feed roller 3 is performed by the operation of the carriage 14.

A carriage 14 is provided with a recording head 15 for performing recording by flying droplets of ink or the like.
It is configured to move in the direction perpendicular to the paper of FIG. 1 using the carriage shaft 16 as a guide. Then, the feed roller 3, the carriage 14, and the recording head 1 are adjusted in accordance with the print signal.
Reference numeral 5 operates in synchronism to feed the recording sheet S, discharge ink, and perform recording.

When the recording is completed, the recording sheet S is discharged onto the discharge tray T by the discharge roller 17 and the pinch roller 18, the carriage 14 returns to the initial position, and the feed roller 10 of the feed device 1 is moved. The state can be switched to a rotatable state.

Next, the case of recording on a thick recording sheet SS in the recording apparatus will be described.

First, the thick recording sheet SS is placed in the state (A).
Is mounted on the pressure plate 2 of the feeding device 1, and the feeding device is
It rotates around state 9 (B), that is, to a position where it becomes horizontal. In the above state (B), the transport path passing between the feeding device 1, the feeding roller 3 and the pinch roller 13, and between the sheet discharging roller 17 and the pinch roller 18 is linear.

The rotation shaft 1 which is the center of rotation of the feeding device 1
9 is mounted coaxially with the gear 7, so that even if the feeding device 1 rotates, there is no problem in meshing with the gears 6 and 7.

Then, in response to the turning operation of the feeding device 1, the lever 20 provided on the feeding device 1 is moved to the cam member 2.
1 is pushed to the left in FIG.
Move to (B).

The cam member 21 is mounted so as to be slidable in the lateral direction of the main body, and performs the above operation in accordance with the turning operation of the feeding device 1.

A roller unit 23 is formed in a transport unit 22 provided to face the head surface 15a of the recording head 15, and moves in a vertical direction on the paper surface of FIG. 1 along a guide hole 24 formed in the main body. It is configured to be. In addition,
The transport unit 22 is constantly urged upward by a lift spring 25.

Accordingly, as described above, the cam member 21
Is moved from the position 21 (A) to the position 21 (B), the transport unit 22 is pushed down from the position 22 (A) to the position 22 (B), and the interval in the thickness direction of the transport path is increased. The thick recording sheet SS can be accurately conveyed and recorded without causing a paper jam or the like.

[0025]

As described above, according to the recording apparatus of the present invention, the distance between the recording head and the recording sheet is kept constant by changing the distance between the rollers of the conveying roller pair according to the conveyance of the thick recording sheet. Thus, the recording sheet can be accurately conveyed and recorded without damaging the recording sheet or the recording head or causing a paper jam.

[Brief description of the drawings]

FIG. 1 is a sectional view of a recording apparatus according to a first embodiment of the invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Feeding device 2 Pressure plate 3 Feeding roller 4-9 Gear 10 Feeding roller 11 Separation sheet 12 Guide 13 Pinch roller 14 Carriage 15 Recording head 16 Carriage shaft 17 Paper discharge roller 18 Pinch roller 19 Rotating shaft 20 Lever 21 Cam Member 22 Transport unit 23 Roller part 24 Guide hole 25 Lift spring

Claims (12)

[Claims] 1. A first sheet on which a recording sheet having a normal thickness is stacked.
And a second position for loading a thick recording sheet separately, a recording head for recording on a recording sheet, and recording the recording sheet loaded on the recording sheet loading means. Transport means for transporting the recording sheet to the head, and moving the recording sheet stacking means from the first position to the second position so that the distance between the recording head and the recording sheet is kept constant. A recording apparatus comprising a conveyance path interval adjusting means for adjusting a conveyance path interval of a recording sheet of the conveying means. 2. The method according to claim 1, wherein the conveying path interval adjusting means includes a conveying roller pair for conveying the recording sheet, and the conveying roller pair can convey a thick recording sheet at an interval of the conveying path. The recording apparatus according to claim 1, wherein: 3. The recording sheet stacking means is rotatably mounted on the main body of the recording apparatus, and the transport path interval adjusting means performs recording with the rotation of the recording sheet stacking means. 2. The recording apparatus according to claim 1, wherein an interval of a sheet conveyance path is adjusted. 4. The recording apparatus according to claim 1, wherein said recording head performs recording by skipping ink. 5. A recording device which is rotatably supported by a recording apparatus main body and can separately set a first position for loading a recording sheet having a normal thickness and a second position for loading a thick recording sheet. Sheet stacking means, a recording head for recording on a recording sheet, a transport unit provided with a plurality of transport rollers for transporting the recording sheet, and a plurality of transport units provided on the recording apparatus main body side facing the transport rollers of the transport unit. And a moving means for moving the transport unit so as to change an interval between the recording head and the recording sheet with a rotation operation of the recording sheet stacking means from a first position to a second position. A recording device comprising: 6. The moving means comprises a lever member fixed to the recording sheet stacking means, and a cam member provided on the transport unit, and the lever is moved in accordance with the rotation of the recording sheet stacking means. The recording apparatus according to claim 4, wherein the conveying unit is moved by a member acting on the cam member. 7. The transport unit is capable of moving up and down,
5. The recording apparatus according to claim 4, wherein the moving unit changes the interval between the recording head and the recording sheet as the recording sheet stacking unit moves from the first position to the second position. 8. The recording apparatus according to claim 4, wherein the recording head performs recording by skipping ink. 9. A first sheet for stacking a recording sheet having a normal thickness.
Sheet stacking means capable of separately setting a position of the recording sheet and a second position for stacking a thick recording sheet; a recording head for recording on the recording sheet; A unit, a plurality of rollers provided on the recording apparatus main body side facing the transport roller of the transport unit, and a moving unit for moving the transport unit so as to adjust a distance between the recording head and the recording sheet to be constant. A recording device comprising: 10. The moving means comprises a lever member fixed to the recording sheet stacking means, and a cam member provided on the transport unit, and a second position from the first position of the recording sheet stacking means. 8. The recording apparatus according to claim 7, wherein the lever unit acts on the cam member in accordance with the movement to the position to move the transport unit. 11. The transport unit according to claim 7, wherein the transport unit moves so as to keep a constant distance between the recording head and the recording sheet as the recording sheet is transported.
The recording device according to any one of the preceding claims. 12. The recording apparatus according to claim 8, wherein the recording head performs recording by skipping ink.