JP2003012188A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording device comprising a low-cost, easy and highly accurate sheet thickness detecting means and a recording device for correcting sheet conveying quantity on the basis of the highly accurate sheet thickness detecting means without causing a shift in record starting position due to thickness difference of a recording sheet. SOLUTION: This recording device comprising a sheet loading means, a sheet feeding means, a sheet conveying means and a recording means has a detecting means of the sheet conveying quantity and a control means for detecting thickness of the recording sheet from the results of the conveying quantity detecting means. The device also has a second control means for correcting the sheet conveying quantity up to the record starting position by the recording means according to the detected 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 device such as a printer, a copying machine, a word processor, a personal computer and a facsimile, and more particularly to a recording device capable of recording on recording sheets of various thicknesses.

[0002]

2. Description of the Related Art Conventionally, sheet thickness detection in a recording apparatus is inserted between a conveying roller and a driven roller of the conveying roller, as disclosed in (a) Japanese Patent Laid-Open No. 10-76640. The amount of movement of the driven roller holding member according to the sheet thickness is detected by an optical distance sensor.

The correction of the sheet conveyance amount to the recording start position by the recording means uses (b) a preset sheet thickness according to the type of the input supported sheet for the correction of the sheet conveyance amount. It was a structure.

[0004]

However, in the above-mentioned conventional recording apparatus, in the case of (a), the use of the optical distance sensor results in an expensive structure.

In the case of (b), a new type of sheet cannot be supported. In addition, in the recording sheet that is not supported,
There is a drawback that the recording start position is displaced due to the thickness of the recording sheet.

Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide an inexpensive, easy and highly accurate sheet thickness detecting means.

Another object of the present invention is to provide a recording apparatus in which the sheet conveyance amount is corrected based on a highly accurate sheet thickness detecting means so that the recording start position does not shift due to the thickness of the recording sheet.

[0008]

A typical configuration of the present invention for achieving the above object is a sheet stacking means for stacking sheets, and a sheet feeding means for sending out the sheets stacked on the sheet stacking means. A conveying means for conveying the sheet on the downstream side of the sheet feeding means in the sheet conveying direction, and a recording means for recording on the sheet according to image information on the downstream side of the conveying means in the sheet conveying direction. In the recording apparatus, the recording medium is provided with a conveyance amount detection unit for the sheet, and a control unit for detecting the thickness of the sheet from the result of the conveyance amount detection unit.

With the above structure, it is possible to provide a recording apparatus which is inexpensive and has a highly accurate sheet thickness detecting means.

Further, the present invention is a recording apparatus comprising a conveying means for conveying a sheet, and a recording means for recording on the sheet according to image information, on the downstream side of the conveying means in the sheet conveying direction, A sheet thickness detecting unit that detects the thickness of the sheet is provided, and a control unit that corrects the sheet conveyance amount to the recording start position by the recording unit according to the thickness of the sheet detected by the sheet thickness detecting unit is provided. It is characterized by that.

Further, according to the present invention, sheet stacking means for stacking sheets, sheet feeding means for sending out the sheets stacked on the sheet stacking means, and the sheet on the downstream side of the sheet feeding means in the sheet conveying direction. In a recording device including a conveyance unit configured to convey a sheet, and a recording unit that records on the sheet according to image information on a downstream side of the conveyance unit in the sheet conveyance direction, the sheet conveyance amount detection unit is provided, A sheet including a first control unit that detects the thickness of the sheet from the result of the conveyance amount detection unit, and a sheet up to a recording start position by the recording unit according to the thickness of the sheet detected by the first control unit. Second to correct the transport amount
A control means is provided.

With the above structure, it is possible to provide a recording apparatus for correcting the sheet conveyance amount based on the highly accurate sheet thickness detecting means.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) An embodiment of a recording apparatus according to the present invention will be described below with reference to the drawings.

In this embodiment, an ink jet recording apparatus will be described as an example of the recording apparatus.

FIG. 1 is a perspective view showing the outer appearance of an ink jet recording apparatus. FIG. 2 is a perspective view showing a schematic configuration inside the inkjet recording apparatus. FIG. 3 is a perspective view showing a main part around a recording unit of the inkjet recording apparatus. FIG. 4 is a front view of the transport roller unit. FIG. 5 is a sectional view of FIG. 4. 6 and 7
[FIG. 4] is a cross-sectional view of the vicinity of a nip portion between a transport roller and a pinch roller. FIG. 8 is a schematic diagram showing the difference in the leading edge position of the recording sheet due to the difference in the thickness of the recording sheet. FIG. 9 is a cross-sectional view around the nip portion between the transport roller and the pinch roller according to the second embodiment. FIG. 10 is a cross-sectional view of the leading edge of the recording sheet around the nip portion between the transport roller and the pinch roller.

First, a schematic structure of an ink jet recording apparatus will be described with reference to FIGS. The inkjet recording apparatus according to the present exemplary embodiment includes a paper feed unit, a transport unit,
A recording unit, a paper discharge unit and the like are provided, and these are housed in the upper case 1 and the lower case 2. Hereinafter, these configurations will be described.

As shown in FIG. 1, the paper feeding unit 3 has a temperature of 30 ° to 30 °.
The recording sheets P are attached to the apparatus main body at an angle of 60 °, and the stacked and set recording sheets P are horizontally discharged after recording. Further, below the paper feed unit 3, there is provided a paper feed port (not shown) for feeding the recording sheet P in a substantially horizontal state.

The paper feed unit 3 is provided with a paper feed roller 4, a movable side guide 5, a pressure plate 6, a base 7, a separation pawl (not shown) and the like which are rotated by the drive of a paper feed motor which is a step motor (not shown). ing. The recording sheets P stacked on the pressure plate 6 are separated by the separation claws and the paper feed roller 4.
The sheets are conveyed one by one to the conveying section 8.

The conveying section 8 is provided with a conveying roller 9, a pinch roller 10, a platen 11, a floating regulating member 12 and the like. The recording sheet P sent to the conveying section 8 has the conveying roller 9 and the pinch roller 10. Sent to the nip part of. In addition, the pinch roller 10 includes a pinch roller holder 13
Via the pinch roller spring 14 through the conveying roller 9
The recording sheet P is pressed by and is rotated by the rotation of the conveyance roller 9 to generate a conveyance force for the recording sheet P. A gear cover 15 is attached to one end of the transport roller 9, and simultaneously protects the transport roller gear 16 and the small gear portion 17a of the intermediate gear 17 with which the transport roller gear 16 meshes.

The drive of the carry motor 18 is transmitted to the carry roller 9 through the intermediate gear 17 and the carry roller gear 16, and the recording sheet P carried between the carry roller 9 and the pinch roller 10 is By the rotation of the transport roller 9, a predetermined amount is transported to the recording start position on the platen 11.

Then, the recording head 19 performs recording based on predetermined image information.

The recording head 19 records an ink image on the recording sheet P conveyed by the conveying roller 9 and the pinch roller 10. As a recording means in this apparatus, an inkjet recording method is used in which ink is ejected from a recording head to perform recording. That is, in this recording head, a fine liquid discharge port (orifice), a liquid passage and an energy acting portion provided in a part of this liquid passage, and energy for generating droplet forming energy for acting on the liquid in the acting portion. Equipped with generating means.

As an energy generating means for generating such energy, a recording method using an electromechanical transducer such as a piezo element, electromagnetic waves such as a laser are radiated to generate heat, and droplets are ejected by the action of the heat generation. There is a recording method using an energy generating unit that causes the liquid to be discharged, or a recording method using an energy generating unit that discharges the liquid by heating the liquid with an electrothermal converter such as a heating element having a heating resistor.

Among them, a recording head used in an ink jet recording system for ejecting a liquid by thermal energy has a high density of liquid ejection ports (orifices) for ejecting recording liquid droplets to form ejection liquid droplets. It is possible to record at high resolution because it can be arrayed. Among them, the recording head using the electrothermal converter as the energy generating means can be easily made compact,
Moreover, the advantages of IC technology and microfabrication technology, whose technological advances and reliability have been remarkably improved in recent semiconductor fields, can be fully utilized, high-density mounting is easy, and manufacturing cost is also advantageous. is there.

As shown in FIG. 2, the recording section 20 includes a carriage 21 on which the recording head 19 is mounted, and the carriage 2 described above.
A guide shaft 22 for reciprocally scanning 1 in the direction perpendicular to the sheet conveying direction, a guide 2 for holding the upper portion of the carriage 21 and maintaining a distance between the recording head 19 and the recording sheet P.
3, a timing belt 25 for transmitting the drive of the carriage motor 24 to the carriage 21, the timing belt 2
5 is provided with an idle pulley 26, which is stretched, and a flexible substrate (not shown) for transmitting a head drive signal from the electric substrate to the recording head 19.

Then, the recording head 19 records an ink image on the recording sheet P, which stands by at the recording start position, by being scanned integrally with the carriage 21.

After that, by the rotation of the carrying roller 9,
For example, the recording head 19 is scanned integrally with the carriage 21 to record an ink image on the recording sheet P on the platen 11 every time the recording sheet P is conveyed in a row unit of, for example, 5.42 mm. .

As shown in FIGS. 2 and 3, the paper discharge unit 27 is mounted on the paper discharge roller 28 and the paper discharge roller 28, and drives the conveyance motor 18 through the intermediate gear 17 to discharge the paper. Paper discharge roller gear 4 that is transmitted to the paper roller 28
0, a spur that is pressed against the paper discharge roller 28 by the urging force of a spring shaft 29 attached to a spur holder (not shown), and is rotated by the rotation of the paper discharge roller 28 to generate a conveyance force for the recording sheet P. 30 and a discharge tray 31 for assisting the discharge of the recording sheet P.

Next, the transport roller unit 32 will be described with reference to FIGS. FIG. 4 is a front view of the transport roller unit 32, showing the groove 9 provided in the transport roller 9.
A CE ring 33 is attached to a, and a compression spring 35 is inserted into one end surface of the CE ring 33 via a washer 34a. Then, with the restoring force of the compression spring 35, the play of the conveying roller 9 in the thrust direction is removed. The left bearing 36 is inserted into the end of the compression spring 35 opposite to the washer 34a via the washer 34b, and by mounting the left bearing 36 together with the right bearing 37 on the frame 38, The transport roller 9 is rotatably mounted on the frame 38.

The conveying roller gear 16 is a washer 3
4c through the washer 34b of the left bearing 36
The conveyance roller gear 16 is press-fitted into the end portion on the opposite side to the rotation stop of the conveyance roller gear 16 by a spring pin 39 inserted into a hole (not shown) of the conveyance roller 9.

As shown in FIG. 5, the gear cover 15 is positioned in the circumferential direction by the outer peripheral portion 16b of the positioning insertion portion 16a of the carrying roller gear 16 with respect to the carrying roller 9.
This is performed by the circumferential positioning portion 15a of the gear cover 15, is fixed to one end of the transport roller 9 with a screw, and rotates integrally with the transport roller 9 and the transport roller gear 16.

The clearance T between the retaining surface 15b of the gear cover 15 for preventing the carrying roller gear 16 from coming off and the end surface 16c of the positioning insertion portion 16a of the carrying roller gear 16 is set to about 0.3. Therefore, even when the transport roller gear 16 moves in the direction A in FIG. 4 due to the restoring force of the compression spring 35, the end surface 16c of the transport roller gear 16 and the retaining prevention surface 15b of the gear cover 15 contact each other. This prevents the transport roller gear 16 from falling off the transport roller 9.

Further, as shown in FIG. 2, the gear cover 15 is configured to simultaneously cover the small gear portion 17a of the intermediate gear 17, which meshes with the transport roller gear 16, and the transport roller gear 16 is also provided. Gear tooth surface 16d of
It is configured to be covered and protected by the gear cover 15.

Next, with reference to FIGS. 6 to 8, a detailed structure around the nip portion between the conveying roller 9 and the pinch roller 10 will be described.

FIG. 6 shows the conveying roller 9 and the pinch roller 10.
In a cross-sectional view around the nip portion of and, a recording sheet P having a thickness t1 = 0.1 mm fed by a sheet feeding roller 4 is conveyed along a rib upper surface 42a which is a sheet passing surface of a sheet passing guide 42, The top end of the recording sheet P is in contact with the recording sheet contact surface 41b of the paper lever 41 that detects that the recording sheet P has been conveyed. At this time, the contact surface 41b has a shape in which the recording sheet conveyance path becomes narrower toward the downstream side in the recording sheet conveyance direction in the recording sheet conveyance path.

When the recording sheet P is further conveyed to the downstream side in the sheet conveying direction from the state of FIG. 6, the paper lever 41
Starts rotating in the direction of arrow A in FIG. 6 about the rotation center 41c of the paper lever 41. Then, with the rotation of the paper lever 41, the movable portion 43a of the paper thickness switch 43 moves in the direction of arrow B in FIG. After that, the paper thickness switch 43 is changed from ON to OFF, and FIG. 7 shows a state in which it is detected that the recording sheet P is conveyed. At this time, the paper lever 41 contacts the recording sheet. The surface 41b and the rib upper surface 42 of the sheet passing guide 42
The angle θ formed with a is set to 30 °.
That is, when the θ becomes 30 °, the presence of the recording sheet P is detected by the paper thickness switch 43.

FIG. 8 is a schematic diagram showing the difference due to the difference in the thickness of the recording sheet P until the presence of the recording sheet P is detected by the paper thickness switch 43. The top end portion of the recording sheet P and the recording sheet P having the thickness t2 is the recording sheet contact surface 4 of the paper lever 41.
1B, the presence of a recording sheet is detected by the paper thickness switch 43. At this time, the difference in the thickness of the recording sheet causes the paper thickness switch 43 to
A difference in the distance X occurs before the presence of the recording sheet is detected. And the said distance X can be calculated | required by the following formula.

X = (t2-t1) / tan θ ... Further, from the start of the conveyance of the recording sheet P having the thickness t1 by the sheet feeding roller 4, the presence of the recording sheet P is determined by the sheet thickness switch 4
3, the conveyance amount of the recording sheet P required to be detected by 3 is set to L, and the recording sheet P is conveyed by Amm by one step of driving the paper feeding motor, and the recording sheet P having the thickness t2 is conveyed from the start of the conveyance. If the number of steps of the paper feeding motor required until the presence of the recording sheet P is detected by the paper thickness switch 43 is Z, the thickness t2 can be calculated by the following formula.

T2 = Ltan θ + t1−AZtan θ ... In the present embodiment, t1 = 0.1 mm, L = 40 mm, A =
The equation is stored in advance with a value of 0.04 mm and θ = 30 °, and the time required from the start of conveyance of the recording sheet P by the paper feed roller 4 to the detection of the presence of the recording sheet P by the paper thickness switch 43 is performed. The thickness of the recording sheet P of which the thickness is unknown can be detected by providing the control means for detecting the step number Z of the paper feeding motor by the above-mentioned method and substituting the detected value Z into the above.

For example, the number of steps Z of the paper feed motor required from the start of conveyance of the recording sheet P of unknown thickness to the detection of the presence of the recording sheet P by the paper thickness switch 43 is 990 steps. When detected, t2 = 40 × tan30 ° + 0.1−0.04 × 990
× tan 30 ° = 0.33 mm.

As described above, according to this embodiment, it is possible to easily and accurately detect the unknown thickness of the recording sheet P at low cost.

Second Embodiment In the above-described embodiment, the start of conveyance of the recording sheet P by the paper feed roller 4 is used as the start trigger for measuring the conveyance amount of the recording sheet P, but as shown in FIG. , The paper thickness detection start switch 44 and the paper thickness switch 4 on the downstream side of the paper feed roller 4 in the recording sheet conveying direction.
3 is provided in the conveyance path of the recording sheet P between the upstream side of the sheet conveyance direction and the start detection of the presence of the recording sheet P by the paper thickness detection start switch 44 is a start trigger of the conveyance amount measurement of the recording sheet P. The configuration will be described.

At this time, the conveyance amount of the recording sheet P required from the start of the presence detection of the recording sheet P having the thickness t1 by the paper thickness detection start switch 44 to the start of the presence detection of the recording sheet P by the paper thickness switch 43. Let L ′ be the number of steps of the paper feed motor required from the start of the presence detection of the recording sheet P having the thickness t2 by the paper thickness detection start switch 44 to the start of the presence detection of the recording sheet P by the paper thickness switch 43. Assuming Z ′, the equation in the above-described embodiment is as follows, and the thickness t2 is obtained.

T2 = L'tan θ + t1-AZ'tan θ ... 'In this embodiment, t1 = 0.1 mm, L' = 10 mm, A
= 0.04 mm, θ = 30 °, the above equation is stored in advance, and the detection of the presence of the recording sheet P by the paper thickness detection start switch 44 is started by the paper thickness switch 43. The number of steps Z ′ of the sheet feeding motor required up to the above is detected by the method described above, and the control means for substituting the detected value Z ′ into the above “′ is provided, so that the thickness of the recording sheet P of unknown thickness is provided. Can be detected.

For example, the number of steps Z'of the paper feeding motor required from the start of conveyance of the recording sheet P of unknown thickness to the detection of the presence of the recording sheet P by the paper thickness switch 43 is 240 steps. If detected, t2 = 10 × tan 30 ° + 0.1−0.04 × 240
× tan 30 ° = 0.33 mm.

As described above, according to this embodiment, the same effect as that of the above-described embodiment can be obtained.

(Third Example) In the embodiments described above,
Although the method of detecting the thickness of the recording sheet P has been described, in the present embodiment, the recording sheet P conveyed by the paper feed roller 4 is changed in accordance with the detected thickness of the recording sheet P.
A correction method when the conveyance roller 9 conveys a predetermined amount to the recording start position will be described with reference to FIG.

FIG. 10 shows the conveying roller 9 and the pinch roller 1.
In a cross-sectional view around the nip portion with 0, the recording sheet P fed by the sheet feeding roller 4 is conveyed to the conveyance roller 9 whose top end is stopped, and the bottom end is stopped to a pinch roller. 10, the recording sheet P is further conveyed by the paper feed roller 4 to the conveying roller 9 and the pinch roller 1.
The figure shows a state in which the recording sheet P is pushed to 0 and a slight amount of bending is generated so that the leading edge of the recording sheet P does not shift in the width direction toward the upstream side and the downstream side in the transport direction.

At this time, the leading edge of the recording sheet P is a distance X from the contact point between the conveying roller 9 and the pinch roller 10,
It will be located on the upstream side in the transport direction. And the X
Is used as a correction value X required when the recording sheet P is conveyed to the recording start position by the conveyance roller 9 from the state of FIG. 10 that changes depending on the thickness of the recording sheet P.

In order to convey the recording sheet P to the recording start position by the conveying roller 9 from the state of FIG. 10, the correction value X is predetermined by the conveying roller 9 and the pinch roller. It is necessary to convey the recording sheet P by the conveying roller 9 by a value obtained by adding the distance H from the contact point 10 to the recording start position.

Then, the radius of the pinch roller 10 is r1,
When the radius of the transport roller 9 is r2, the thickness of the recording sheet P is t, and r1 + r2-t = B, the correction value X is calculated by the following equation.

[0052]

[Equation 1]

Further, assuming that the amount of conveyance of the recording sheet P by the conveying roller 9 conveyed by one step driving of the conveying motor 18 is C, from the state of FIG. Necessary to transport to
The number of drive steps Y of the carry motor 18 is obtained by the following formula.

Y = (H + X) / C ... In the present embodiment, the above formula is stored in advance with the values of r1 = 2.5 mm and r2 = 6.5 mm, and C = 0.028.
The above equation is stored in advance with a value of 22 mm.

Further, the result obtained by substituting the thickness of the recording sheet P detected by the method described in the above-mentioned embodiments into the above equation is substituted into the above equation and is predetermined by the image information to be recorded. Then, the distance H is substituted into the equation to calculate the driving step number Y of the carry motor 18. Then, according to the value of Y, the recording sheet P is provided with a control unit that drives the conveyance motor 18 from the state of FIG. 10 to convey the recording sheet P to the recording start position by the conveyance roller 9. The recording sheet P can be conveyed to the recording start position by the conveying roller 9 without being affected by the difference in the thickness of the recording sheet P.

For example, as described in the above embodiments, it is detected that the thickness of the recording sheet P is 0.33 mm, and from the image information to be recorded, from the contact points of the conveying roller 9 and the pinch roller 10. The distance H to the recording start position is 2
When it is detected as 5 mm, the value of Y is about 92.
4, the conveyance motor 18 is set to 924 from the state of FIG.
By driving in steps, the recording sheet P can be conveyed by the conveying roller 9 to the recording start position.

As described above, according to this embodiment, it is possible to obtain an effect that it is possible to inexpensively and easily and accurately perform recording from a desired recording start position even with recording sheets P having various thicknesses. It was

(Fourth Example) In the third embodiment, the method of detecting the thickness of the recording sheet P has been described by the method described in the first and second embodiments. It is needless to say that the method for detecting the thickness is not limited to the method described above, and although it is somewhat expensive, the thickness of the recording sheet P can be adjusted by the method disclosed in Japanese Patent Laid-Open No. 10-76640. Even if it detects, the same effect as 3rd Embodiment can be acquired by the method similar to the content demonstrated in 3rd Embodiment.

Further, in the above-described embodiments, the member for detecting the presence of the recording sheet P has been described as a switch, but needless to say, it is not limited to the above-mentioned switch, and it is electrically recorded. As long as the presence of the sheet P can be detected, the same effect can be obtained with any detection member such as a reflective sensor or a transmissive sensor.

Further, it goes without saying that the above set values are not limited to the above described values, and the set values can be set differently by various recording devices.

[0061]

EFFECTS OF THE INVENTION According to the present invention, since it has the above-described structure and operation, (1) it is possible to provide an inexpensive, easy and highly accurate sheet thickness detecting means.

Further, (2) it is possible to provide a recording apparatus that can inexpensively and easily and accurately perform recording from a desired recording start position regardless of the thickness of the recording sheet.

[Brief description of drawings]

FIG. 1 is a perspective view showing the outer appearance of an inkjet recording apparatus for explaining a first embodiment of the present invention.

FIG. 2 is a perspective view showing a schematic configuration inside an inkjet recording apparatus.

FIG. 3 is a perspective view showing a main part around a recording unit of the inkjet recording apparatus.

FIG. 4 is a front view of a transport roller unit.

5 is a sectional view of FIG.

FIG. 6 is a cross-sectional view around a nip portion between a transport roller and a pinch roller.

FIG. 7 is a cross-sectional view around a nip portion between a transport roller and a pinch roller.

FIG. 8 is a schematic diagram showing the difference in the leading edge position of the recording sheet due to the difference in the thickness of the recording sheet.

FIG. 9 is a cross-sectional view around a nip portion between a transport roller and a pinch roller according to the second embodiment.

FIG. 10 is a cross-sectional view of the leading edge of the recording sheet around the nip portion between the transport roller and the pinch roller.

[Explanation of symbols]

1 upper case 2 lower case 3 paper feeder 4 paper feed rollers 5 Movable side guide 6 Pressure plate 7 base 8 Transport section 9 Conveyor rollers 10 pinch rollers 11 Platen 12 Floating control member 13 pinch roller holder 14 pinch roller spring 15 gear cover 16 Conveyor roller gear 17 Intermediate gear 18 Conveyor motor 19 recording head 20 recording section 21 carriage 22 Guide shaft 23 Guide 24 carriage motor 25 timing belt 26 idle pulley 27 Paper output section 28 Paper ejection roller 29 Spring axis 30 spurs 31 output tray 32 Conveyor roller unit 33 CE ring 34 washers 35 Compression spring 36 left bearing 37 Right bearing 38 frames 39 Spring pin 40 Ejection roller gear 41 Paper lever 42 Paper feed guide 43 Paper thickness sensor 44 Paper thickness detection start switch P recording sheet

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tomonori Sato             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non non corporation (72) Inventor Takeaki Nakano             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non non corporation (72) Inventor Kazuya Sakamoto             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non non corporation (72) Inventor Daigoro Kanematsu             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non non corporation (72) Inventor Masafumi Wataya             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non non corporation (72) Inventor Tomoaki Masaki             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non non corporation F-term (reference) 2C058 AB15 AC07 AD04 AE02 GA02                       GB03 GB06 GB18 GB20 GB31                       GB47                 3F048 AA05 AB01 BA06 BB02 BB05                       BB10 CA02 DA06 DC02 DC09                       EB22 EB24

Claims (15)

[Claims] 1. A sheet stacking unit for stacking sheets, a sheet feeding unit for sending out the sheets stacked on the sheet stacking unit, and a transport for transporting the sheet on the downstream side of the sheet transporting unit in the sheet transport direction. And a recording means for recording on the sheet according to image information on the downstream side of the conveying means in the sheet conveying direction, comprising a conveying amount detecting means for the sheet, and detecting the conveying amount. A recording apparatus comprising a control means for detecting the thickness of the sheet from the result of the means. 2. The conveyance amount detection means is composed of a detection start means for starting detection of the sheet conveyance amount by the sheet feeding means, and a detection end means for ending detection of the sheet conveyance amount. The recording apparatus according to claim 1, wherein the recording apparatus is a recording apparatus. 3. The recording apparatus according to claim 2, wherein the detection start by the detection start unit is triggered by a drive start of the feeding unit. 4. The recording according to claim 2, wherein the detection start by the detection start means is triggered by the sheet detection by the sheet detection means provided between the feeding means and the conveying means. apparatus. 5. The detection termination by the detection termination means is performed by detecting the movement of a movable sheet intrusion regulating member in which the sheet conveyance path becomes narrower toward the downstream side in the sheet conveyance direction. The recording apparatus according to any one of claims 2 to 4, which is characterized. 6. A recording apparatus comprising: a conveying unit configured to convey a sheet; and a recording unit configured to record on the sheet according to image information, on a downstream side of the conveying unit in the sheet conveying direction. And a control means for correcting the sheet conveyance amount to the recording start position by the recording means according to the thickness of the sheet detected by the sheet thickness detection means. Recording device. 7. The conveying means comprises a conveying roller and a driven roller of the conveying roller, and the sheet thickness detecting means comprises:
7. The recording apparatus according to claim 6, which is a movement amount detection unit of the driven roller that moves according to the sheet thickness. 8. A sheet stacking unit for stacking sheets, a sheet feeding unit for sending out the sheets stacked on the sheet stacking unit, and a transport for transporting the sheet downstream of the sheet transporting unit in the sheet transport direction. And a recording means for recording on the sheet according to image information on the downstream side of the conveying means in the sheet conveying direction, comprising a conveying amount detecting means for the sheet, and detecting the conveying amount. A first control unit that detects the thickness of the sheet is provided from the result of the unit, and the sheet conveyance amount to the recording start position by the recording unit is corrected according to the thickness of the sheet detected by the first control unit. A recording apparatus comprising a second control means for 9. The conveyance amount detecting means includes a detection starting means for starting detection of the sheet conveyance amount by the sheet feeding means and a detection end means for ending detection of the sheet conveyance amount. The recording apparatus according to claim 8, wherein the recording apparatus is a recording apparatus. 10. The detection start by the detection start means is
The recording apparatus according to claim 9, wherein the driving start of the feeding unit is used as a trigger. 11. The detection start by the detection start means includes:
The recording apparatus according to claim 9, wherein a sheet detection by a sheet detection unit provided between the feeding unit and the conveyance unit is used as a trigger. 12. The end of detection by the detection end means is
10. The process is performed by detecting the movement of a movable sheet intrusion regulating member in which the sheet conveying path becomes narrower toward the downstream side in the sheet conveying direction.
13. The recording device according to claim 11. 13. The ink jet recording system according to claim 1, wherein the recording device is an ink jet recording system in which a recording unit ejects ink in accordance with a signal to perform recording. Recording device. 14. The recording device according to claim 13, wherein the recording device includes an electrothermal converter for generating thermal energy for ink ejection by the recording means. 15. The recording apparatus according to claim 14, wherein the recording means ejects the ink from the ejection port by utilizing the film boiling generated in the ink by the thermal energy applied by the electrothermal converter. The recording device according to 1.