JP2002128351A - Toothed roller installing device and recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a toothed roller installing device provided with a toothed roller holder having a structure for protecting human fingers or the like from a toothed holder for preventing the human fingers from accidentally getting in contact with the toothed roller journalled to the toothed roller holder to be injured. SOLUTION: A protective part 36 has such a protruded curved surface form that teeth of the toothed roller 31 is hidden. Because of the protruded curved surface form of the protective part 36 and the accessing structure to the toothed roller 31, operators cannot easily get in contact with the teeth of the toothed roller 31, so that their fingers or the like can be protected from the toothed roller 31. Even when the toothed roller 31 moves upward due to vertical oscillation of the toothed roller holder 32, position relation between the toothed roller 31 and the protective part 36 is maintained since the protective part 36 is provided on the toothed roller holder 32, thereby the toothed roller 31 is kept without being exposed from the protective part 36.

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 toothed roller having a plurality of teeth around the periphery thereof, and each tooth having a sharp pointed end such that the tip of each tooth comes into point contact with a recording surface of a recording material.

[0002]

2. Description of the Related Art A recording head reciprocating in a main scanning direction;
A recording apparatus, such as an ink jet recording apparatus, which has a recording material transport unit that transports the recording material in the sub-scanning direction and discharges ink from a recording head onto the recording material to perform recording. As a means for discharging the recording material, a discharge driving roller which is rotated by a driving source and discharges the recording material in contact with the lower surface of the recording material, and a recording material which is individually urged toward the discharging driving roller side, And a plurality of discharge driven rollers that rotate in accordance with the discharge of the recording material.

[0003] The discharge driven roller is a toothed roller having a plurality of teeth around the tip thereof, and the tip of each tooth being sharply pointed so as to make point contact with the recording surface of the recording material. Such a toothed roller makes contact with the recording surface not at the surface but at a point, so that the area of contact with the recording surface can be reduced. Therefore, there is an advantage in that the discharge driven roller comes into contact with the recording surface of the recording material after recording, and the recording surface is less likely to be stained or damaged.

[0004]

Such a toothed roller has sharply pointed teeth, so that, for example, if a finger or the like accidentally touches the toothed roller during recording operation. There is a risk that the finger may be hurt. In particular, when the recording on the recording material is completed and the recording material is discharged at once, the toothed roller rotates at a high speed, so that there is a high possibility of such rotation. Therefore, in the related art, the toothed roller is disposed at a position where it is difficult to touch a human hand due to the structure on the recording device side, and protects a finger or the like from the toothed roller.

However, in a recording apparatus in which the toothed rollers are individually rotatably supported by a toothed roller holder and a discharge driven roller is constituted by a plurality of toothed roller holders, only the structure on the recording apparatus side is used. Then, it was not possible to protect human fingers and the like from the toothed roller.

An object of the present invention is to provide a toothed roller supported by a toothed roller holder by a toothed roller mounting device having a toothed roller holder having a structure for protecting a finger or the like from the toothed roller. An object of the present invention is to prevent a person's finger or the like from being inadvertently touched and damaged.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of teeth are provided around the periphery, and the tips of the teeth make point contact with the recording surface of the recording material. A toothed roller having an acutely pointed angle is rotatably supported by a toothed roller holder, and the toothed roller in a recording device having a toothed roller mounting device to which a plurality of the toothed roller holders are mounted. The roller mounting device is a toothed roller mounting device, wherein the toothed roller holder includes a protection portion that cannot easily touch the teeth of the toothed roller.

[0008] As described above, by providing the toothed roller holder with a protective portion having a structure that cannot easily touch the teeth of the toothed roller, a finger or the like may erroneously touch the toothed roller. There is no end. Thus, according to the toothed roller mounting device according to the first aspect of the present invention, it is possible to obtain an operational effect that it is possible to prevent a person's finger or the like from accidentally touching and damaging the toothed roller.

According to a second aspect of the present invention, in the first aspect, the toothed roller holder is mounted on the toothed roller mounting device so as to be vertically swingable. Is a toothed roller mounting device.

As described above, in the toothed roller mounting device in which the toothed roller holder is vertically swingably mounted, the protective member is provided on the toothed roller holder that swings up and down, so that the toothed roller holder is provided. The effect of the toothed roller mounting device according to claim 1 of the present application can be obtained regardless of the position in the swingable range.

According to a third aspect of the present invention, in the second aspect, a lateral direction generated by a structure in which the toothed roller holder is vertically swingably mounted on an inner wall surface of the toothed roller holder. A relief portion is provided to allow the toothed roller to be positioned in parallel with the transport direction of the recording material in a state of being slightly inclined with respect to the transport direction of the recording material due to backlash. Is a toothed roller mounting device.

Here, the "slightly inclined state" of the toothed roller holder means that the toothed roller holder has a movable structure capable of swinging up and down and slightly occurs in the support portion of the toothed roller holder. In response to the backlash, it means tilting left and right by that backlash. The “escape portion” means that the toothed roller in the oblique direction is similarly not obstructed by the inner wall of the toothed roller holder in the toothed roller holder that is inclined by the slightly inclined state. Means the space in the toothed roller holder enlarged enough to return to the parallel state.

As described above, in the toothed roller holder in which the toothed roller holder is swingably mounted vertically, the relief portion is formed on the inner wall surface of the toothed roller holder. Even when the recording material is inclined with respect to the transport direction, the return drive roller is not prevented from returning to the parallel state, and the coating layer can be prevented from peeling or stabbing even when recording on coated paper. become.

[0014] The invention described in claim 4 of the present application provides claims 1 to
3. In any one of the above-mentioned 3, the said protection part has the structure which provided the wall which has the surface perpendicular | vertical to the rotation axis of the said toothed roller exposed from the said toothed roller mounting apparatus on both sides of the said toothed roller. , A toothed roller mounting device.

As described above, the walls are provided on both sides of the exposed toothed roller so that the teeth of the toothed roller sandwiched between the walls cannot be easily touched.
The operation and effect of the toothed roller mounting device according to any one of the above items can be obtained.

[0016] The invention described in claim 5 of the present application is the first to fifth aspects of the present invention.
3. The toothed roller mounting device according to claim 3, wherein the protection unit has a structure that covers the toothed roller exposed from the toothed roller mounting device.

[0017] The toothed roller mounting according to claim 1 or 2 of the present application, by having a structure that covers the toothed roller with the protection part exposed so as not to touch the teeth of the toothed roller. The operation and effect of the device can be obtained.

According to a sixth aspect of the present invention, there is provided a recording head which reciprocates in a main scanning direction, and a recording material transport means for transporting a recording material in a sub-scanning direction. A recording apparatus which performs recording by discharging onto a recording material, wherein the recording apparatus includes the toothed roller mounting apparatus according to any one of claims 1 to 5. is there.

According to the recording apparatus of the invention described in claim 6 of the present application, in the recording apparatus, the operation and effect of the invention described in any one of claims 1 to 5 of the present invention can be obtained.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic plan view of an ink jet recording apparatus provided with a toothed roller mounting apparatus according to the present invention, and FIG. 2 is a schematic side view thereof.

The recording device 50 includes a carriage guide shaft 5
A carriage 6 that is pivotally supported by 1 and moves in the main scanning direction X
1 and a platen 52 are provided. A recording head 62 for ejecting ink onto the recording material 1 to perform recording is mounted on the carriage 61, conveys the carriage 61 in the main scanning direction X, and moves the recording material 1 between the carriage 61 and the platen 52. While transporting in the scanning direction Y, the recording head 62
The recording is performed on the recording material 1 by discharging ink onto the recording material 1.

The recording material transporting means for transporting the recording material 1 fed from the recording material feeding tray 21 in the sub-scanning direction Y includes a transport driving roller 53 and a transport driven roller 54.
Is provided. The transport drive roller 53 is rotationally controlled by a rotational driving force of a stepping motor or the like, and the recording material 1 is transported in the sub-scanning direction Y by the rotation of the transport drive roller 53. A plurality of transport driven rollers 54 are provided, each of which is individually urged by the transport drive roller 53, and when the recording material 1 is transported by the rotation of the transport drive roller 53, the transport driven roller 54 comes into contact with the recording material 1 and performs recording. It rotates following the transport of the material 1.

On the other hand, as means for discharging the recorded recording material 1, a discharge drive roller 55 and a toothed roller 31 are provided. The rotation of the discharge drive roller 55 is controlled by a rotational driving force of a stepping motor or the like, and the recording material 1 is discharged in the sub-scanning direction Y by the rotation of the discharge drive roller 55. A plurality of toothed rollers 31 are provided, and a plurality of teeth are provided around the periphery, and a plurality of teeth are sharply sharpened so that the tips thereof are in point contact with the recording surface of the recording material 1. When the recording material 1 is urged by the urging force weaker than the urging force of the roller 54 and is discharged by the rotation of the discharge drive roller 55, the recording material 1 comes into contact with the recording material 1 and follows the discharge of the recording material 1. Rotate.

The recording device 50 is provided with a toothed roller mounting device 33 having a plurality of toothed rollers 31.

FIG. 3 is a plan view of the toothed roller mounting device 33 according to this embodiment.

The toothed roller 31 is rotatably supported on a toothed roller holder 32 by a toothed roller mounting shaft 34 made of a bar spring. The plurality of toothed roller holders 32 are urged toward the discharge drive roller 55 by the bar springs 37 with the holder mounting shaft 35 as a fulcrum, and the toothed roller 31 can swing up and down individually. , Mounted on a toothed roller mounting device 33. A bar spring is also used for the toothed roller mounting shaft 34, and the rotation axis of the toothed roller 31 is
A force acts so as to be kept perpendicular to the sub-scanning direction Y. Then, the toothed roller holder 32 forms a wall having a surface perpendicular to the rotation axis of the toothed roller 31 with the toothed roller 3.
1 is provided with a protection portion 36 having a structure provided close to both sides.

FIG. 4 is a cross-sectional view (FIG. 3) of the toothed roller mounting device 33 according to this embodiment taken along line IV-IV in FIG.
FIG. 4A shows a state in which the toothed roller holder 32 is positioned at the lower end of the vertical swing range and is urged by the discharge driving roller 55. Is shown. As shown in FIG.
Has a convex curved surface shape such that the teeth of the toothed roller 31 are hidden. Due to the convex curved surface shape of the protection portion 36 and the above-described structure for approaching the toothed roller 31, it is not possible to easily touch the teeth of the toothed roller 31, and it is possible to protect a finger or the like from the toothed roller 31. It becomes possible.

FIG. 4B shows a state in which the toothed roller holder 32 is located at the upper end of the vertical swing range and is not urged by the discharge drive roller 55. FIG. 4A and FIG.
The switching between (b) and (b) is performed by a cam mechanism of a cam 39 and a cam follower 38. in this way,
Even if the toothed roller 31 moves upward due to the vertical swing of the toothed roller holder 32, the protection portion 36 is provided on the toothed roller holder 32, so that the toothed roller 31 is provided.
And the protection part 36 is maintained in a positional relationship, and the toothed roller 3
1 is not exposed from the protection part 36.

On the inner wall surface of the toothed roller holder 32, a space downstream of the toothed roller holder 32 in the transport direction is widened, and the toothed roller 31 is positioned parallel to the transport direction of the recording material. Since the relief portion 29 is formed to allow the toothed roller 31, the toothed roller 31 can easily return to the normal direction even when the toothed roller holder 32 is inclined in the oblique direction.

Hereinafter, the principle of the toothed roller 31 returning to the parallel state will be described with reference to FIG.
In FIG. 5, for convenience of description, the features and the inclination angles of each part are emphasized. Arrows in the drawing indicate the transport direction of the recording material.

While the recording material is being conveyed, the toothed roller 31 may tilt from a state where the teeth 311 abut perpendicularly to the paper surface to a state where the tooth 311 slightly tilts left and right. In order to eliminate the change (inclination) in the vertical angle, the toothed roller 3
1 changes the direction in the toothed roller holder 32 while rotating, from a state parallel to the conveyance direction [FIG. 5, (a)] to a state slightly oblique to the conveyance direction. , (B)]. On the other hand, the toothed roller holder 32 originally has a role of restricting the rotation direction of the toothed roller 31. However, since the toothed roller holder 32 is configured to be able to swing up and down as described above, 32
The holder 23 has some play (play) in the holder mounting shaft 35 for supporting the frame 23, and there is room for the frame 23 to slightly swing left and right about the holder mounting shaft 35 as a fulcrum. For this reason, with the change in the direction of the toothed roller 31, the toothed roller holder 32, which has room for slight swinging in the left and right directions with respect to the transport direction, is also pushed by the toothed roller 31 from the inside, and It tilts in an oblique direction and stops at the tilt limit [(c)]. Here, the toothed roller 31 has a property of naturally returning to the normal direction while rotating, but since the toothed roller holder 32 is still inclined, the inner wall of the toothed roller holder 32 is obstructed. And the return to the normal direction is prevented. If the recording material continues to be conveyed in this state, the toothed roller 31 cannot rotate smoothly. This may cause stabbing, leading to a decrease in print quality.

Therefore, in the present invention, a step 27 is provided on the inner wall surface of the toothed roller holder 32 so that the distance between the inner walls on the downstream side in the transport direction is longer than the distance between the inner walls on the upstream side in the transport direction. This allows the portion on the downstream side in the transport direction of the toothed roller 31 to be returned to escape into the space (escape portion 29) wider than the step portion 27 in the toothed roller holder 32, and Roller 3
1 is such that it can quickly return to the normal direction [(d)]. In this way, creating a situation in which the toothed roller 31 easily returns to the normal direction minimizes the time during which the teeth 13 come into contact with the paper 13 in a state of being inclined with respect to the paper surface, and damages the surface of the recording material. It is possible to avoid peeling and stubbing when using paper or coated paper. Also, as in the present embodiment, when an elastically deformable bar spring is used as the toothed roller mounting shaft 34 that is the rotation shaft of the toothed roller 31, the return to the normal direction is promoted by the centering action.

In another embodiment, the toothed roller holder 32 has a structure in which the protective portion 36 covers the toothed roller 31 so that the toothed roller 31 is completely invisible. Things. With the protective portion 36 having such a structure, the toothed roller 3
1 cannot be touched, so that a finger or the like does not accidentally touch and damage the toothed roller.

[0035]

According to the present invention, a toothed roller mounting device having a toothed roller holder having a structure for protecting a human finger or the like from a toothed roller has a toothed roller supported by the toothed roller holder. It is possible to prevent a finger or the like from accidentally touching and damaging the roller.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a recording apparatus provided with a toothed roller mounting apparatus according to the present invention.

FIG. 2 is a schematic side view of a recording apparatus provided with a toothed roller mounting apparatus according to the present invention.

FIG. 3 is a plan view showing a toothed roller mounting device according to the present invention.

FIG. 4 is a sectional view of a main part of the toothed roller according to the present invention, taken along line IV-IV.

FIG. 5 is a schematic diagram illustrating a state of a toothed roller and a toothed roller holder during conveyance of a recording material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recording material 21 Recording material feeding tray 29 Escape part 31 Toothed roller 32 Toothed roller holder 33 Toothed roller mounting device 34 Toothed roller mounting shaft 35 Holder mounting shaft 36 Protection part 37 Bar spring 38 Cam follower 39 Cam 51 Carriage guide shaft 52 Platen 53 Transport drive roller 54 Transport driven roller 55 Discharge drive roller 61 Carriage 62 Recording head 311 Teeth 312 Step X X main scanning direction Y sub scanning direction

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Tajima 3-3-5 Yamato, Suwa-shi, Nagano F-term in Seiko Epson Corporation (reference) 2C056 HA29 HA34 2C059 BB03 BB07 BB10 BB12 BB13 BB15 BB22 BB27 3F049 AA03 CA02 DA12 LA01 LB03

Claims (6)

[Claims] 1. A toothed roller holder having a plurality of teeth therearound, the tip of each tooth being sharply pointed so as to make point contact with a recording surface of a recording material, is rotatable by a toothed roller holder. In a recording apparatus having a toothed roller mounting device that is pivotally supported and has a plurality of the toothed roller holders attached thereto, the toothed roller mounting device may be configured such that the toothed roller holder easily attaches to the teeth of the toothed roller. A toothed roller mounting device comprising a protection part that cannot be touched. 2. The toothed roller mounting device according to claim 1, wherein the toothed roller holder is attached to the toothed roller mounting device so as to swing up and down. 3. The transporting of a recording material according to claim 2, wherein the toothed roller holder is mounted on the inner wall surface of the toothed roller holder in a lateral direction by a structure in which the toothed roller holder is vertically swingably mounted. A toothed roller provided in a state in which the toothed roller is positioned parallel to the conveyance direction of the recording material in a state where the toothed roller is slightly inclined with respect to the direction. apparatus. 4. The method according to claim 1, wherein
The said protection part has the structure which provided the wall which has the surface perpendicular to the rotation axis of the said toothed roller exposed from the said toothed roller mounting apparatus on both sides of the said toothed roller, Roller mounting device. 5. The method according to claim 1, wherein:
The toothed roller mounting device, wherein the protection unit has a structure that covers the toothed roller exposed from the toothed roller mounting device. 6. A recording head reciprocating in a main scanning direction,
2. A recording apparatus, comprising: a recording material transport unit configured to transport a recording material in a sub-scanning direction, and performing recording by discharging ink from the recording head onto the recording material. A recording device comprising the toothed roller mounting device according to any one of claims 1 to 5.