JPS63127942A - Recording material conveying method - Google Patents

Abstract

PURPOSE:To prevent any rumple on recording material from occurring, by attaching a roller, conveying the recording material as pressurizing it, to the conveying direction aslant, and forming a loop of the recording material between a feed roller at the upstream and the pressure roller. CONSTITUTION:Recording material S is drawn out of a roll and conveyed in an arrow A direction by feed rolls 81 and 83. Next, the recording material S is taken into guide rollers 180, 182 and pressure nip rollers 80 and 82 tilted as far as an angle theta to the conveying direction A. Each speed of motors 85 and 87 is controlled a controller 300, speed of the motor 87 is made larger than that of the motor 85, and a loop S1 is formed between these feed rollers 81, 83 and pressure nip rollers 80 and 82, while the motor speed is controlled so as to keep this loop S1 all the time. The recording material S is nipped from a square part S2. With this constitution, the recording material S is smoothly nipped, thus any rumple is prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of conveying a recording material within an image recording apparatus, and more particularly to a method of conveying a recording material while being pressurized by a roll.

[Technical background of the invention and its problems]

An example of an image recording material that requires at least a pressure treatment step is the one disclosed in JP-A-57-179836, in which a vinyl compound, a photopolymerization initiator, and a colorant precursor are formed on a support. Systems carrying synthetic polymeric resin-walled capsules containing . The image recording method using this system is to imagewise harden the microcapsules by exposure to light, rupture the unhardened microcapsules by applying pressure, and obtain a color image from the released colorant precursor. The method is characterized in that high quality images can be obtained through simple dry processing. However, this system has the drawback of significantly lower photosensitivity than systems using silver halogenide.

A new recording material that improves these drawbacks, has high photosensitivity, and is capable of obtaining high-quality images through simple dry processing has been proposed in Japanese Patent Application No. 1986-2001 filed by the present applicant.
It is disclosed in the specification of No. 117089. This recording material is a photosensitive and pressure-sensitive thermal development material, in which at least a photosensitive silver halide, a reducing agent, a polymerizable compound, and a color image forming substance are coated on a support, and at least the polymerizable compound and the color image forming substance are coated on a support. The color imaging material consists of a photosensitive composition encapsulated in identical microcapsules.

Regarding the image recording method of recording an image using this light-sensitive pressure-sensitive heat development material,
0-121284. This image recording method first performs imagewise exposure to form a latent image, then develops it by heating, and polymerizes the polymerizable compound in the area where the latent image exists to form a macromolecular compound to form microcapsules. harden. Then, the image-receiving material having an image-receiving layer to which the color image-forming substance can be transferred is stacked and pressed,
At least a portion of the microcapsules in the area where the latent image does not exist is ruptured, and a color image-forming substance is transferred to the image-receiving material, thereby obtaining an image on the image-receiving material.

Then, using the photosensitive and pressure-sensitive heat development material, this heat development material is subjected to imagewise exposure and heat development, and then superimposed on an image receiving material and pressurized to transfer the material to the image receiving material with desired density and desired color density. An image recording device has also been proposed that automatically performs the steps up to obtaining images.

In this image recording device, in order to transfer the photosensitive pressure-sensitive heat-developable material after heat development onto the image-receiving material, the photo-sensitive pressure-sensitive heat-developable material and the image-receiving material are overlapped and inserted between a pair of pressure rolls. Pressure is applied from the front and back sides at a high pressure of, for example, 500 kliJ/cm.

However, the front edges of the photosensitive pressure-sensitive heat development material and the image receiving material are aligned in the conveyance direction, and the front edges are conveyed parallel to the pressing part of the pressure roll, so the entire front edge is simultaneously applied to the pressure roll. There is a problem that there is a large resistance when the pressure rolls are inserted in contact with each other, and that it is difficult to bite between the pressure rolls.

Also, when these are inserted between the pressure rolls, the vicinity of the previous edge is suddenly pressed with high pressure, so the subsequent pressure area M,
The pressure is stronger than that of the original, and uneven transfer occurs due to uneven pressing force.

Furthermore, when the photosensitive pressure-sensitive thermal development material and the image-receiving material are discharged from the pressure rolls, the pressure rolls suddenly come into contact with each other under high pressure, resulting in a very large impact, which damages the pressure roll and its support. There are problems in that it is easily damaged and has poor durability.

In addition, not only image recording devices but also electrophotographic devices may perform pressure fixing using rolls.
The tendency of the recording material to bite into the roll that is pressed at high pressure and the non-uniformity of the pressing force are unavoidable problems.

In order to solve this problem, a method or device has also been proposed in which a pressure roll is disposed diagonally with respect to the recording material and the recording material bites into the roll from the corner.

However, if the pressure roll is installed diagonally to convey the recording material,
The conveyance direction changes between the front and rear parts of the recording material, and the front part of the recording material is conveyed in a direction perpendicular to the pressure roll. Therefore,
The recording material is conveyed at the rear by another conveyor roll.
Since the conveyance direction is different between the front and rear parts, distortion occurs, and furthermore, there is a problem in that the paper is pressurized and wrinkles are produced.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a recording material that does not become distorted or wrinkled even when the front and rear parts of the recording material are conveyed in different directions by installing pressure rolls diagonally. The objective is to provide a transportation method.

[Failure to solve the problem]

The above-mentioned object of the present invention is a method for conveying a recording material while pressurizing it in an image recording apparatus, and the method includes: This is achieved by a recording material conveying method characterized in that a loop of the recording material is formed between a pressure roll and a conveyance roll upstream thereof, and the recording material is conveyed while maintaining the loop.

In other words, by forming a loop of the recording material between the pressure roll that conveys the front part of the recording material and the upstream conveyance roll that conveys the rear part, it is possible to prevent distortion caused by the front and rear of the recording material being conveyed in different directions. Even if distortion occurs, the loop can absorb it. Therefore, even if pressurization is performed while the recording material is distorted, wrinkles will not occur, and good pressurized conveyance can be ensured.

In order to form a loop of the recording material, for example, a conveyance roll upstream of the pressure roll is rotated faster than the pressure roll to change the conveyance speed between the front and rear sides of the recording material.

Alternatively, the driving of the press roll is temporarily stopped, and during that time, the marking material is transported by the upstream transport roll,
Overfeeding the pressure roll with recording material.

Note that the recording material in the present invention may be any material as long as it requires a step of applying pressure as a processing step of the recording material.

[Embodiment]

Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a cross-sectional view of an image recording apparatus for carrying out the method of the present invention.
It will be installed. A well-known imaging lens moving type imaging optical system 200 is arranged below the glass plate 2 . That is,
The imaging optical system 200 includes an illumination lamp 208 and mirrors 210, 212, and 2 that integrally scan the entire surface of the glass plate 2 below.
14, and imaging lens/filter unit assembly 21
6. Furthermore, 1/2 of the scanning distance of the illumination lamp 208, etc.
It consists of mirrors 218, 220 that move in the same direction, and a fixed mirror 222.

Inside the housing 1, a portion including the imaging optical system 200 is separated from other portions by a partition wall 224. Optical axis 2 of imaging optical system 200 reflected by fixed mirror 222
An opening 228 is provided in the portion through which the opening 26 passes.
A shutter device 240 is arranged at 28 .

A photosensitive material cartridge 14 containing a photosensitive material roll 12 wound with a photosensitive pressure sensitive thermal development material S (hereinafter referred to as photosensitive material) is removably attached to the side of the housing 1. Outlet 1 of the photosensitive material S of the photosensitive material cartridge 14
A pair of photosensitive material drawing rolls 22,22 housed in the magazine connection dark box 20 are disposed at 6, whereby the photosensitive material S wound around the photosensitive material roll 12 is ejected by a certain length at a predetermined time.

When the leading edge of the photosensitive material S advances, the photosensitive material pushing rolls 22, 22 move away from each other as shown by phantom lines to facilitate the advance of the photosensitive material S. A cutter unit 23 for cutting the photosensitive material S and a guide plate 24 are arranged in front of the magazine connection & IT box 20 (hereinafter, "front" refers to the downstream side in the direction of travel of the photosensitive material, etc.). .

In front of the guide plate 24, an exposed photosensitive material support roll 26 and two photosensitive material nip rolls 28, 30 pressed against the exposed photosensitive material support roll 26 are arranged. The photosensitive material S guided by the guide plate 24 is brought into close contact with the exposed photosensitive material support roll 26 by the photosensitive material nip rolls 28.30.
Imagewise exposure of the document is made by imaging optics 200 at a position 32 between 30 and 30 .

A heat developing device 40 that heats and develops the exposed photosensitive material S is arranged in front of the exposed photosensitive material support roll 26 . The heat developing device 40 includes a developing housing 42 having a heat insulating effect, and is disposed within the developing housing 42, and has a diameter of about 120 mm.
An endless belt 50 is supported by a heating roll 44 heated to 0.degree.

A nip roll 52 is pressed against a support roll 49.

The heat developing device 40 further includes an exposed light-sensitive material support roll 26.
A guide device 54 guides the photosensitive material S fed from the heating roll 44 onto the heating roll 44 and separates the photosensitive material S from the heating roll 44 after being heated and developed, and a guide device 54 that guides the photosensitive material S sent from the support roll 49 and the nip roll 52 to the developed photosensitive material S It has nine vertical guides [58] for guiding to the exit 56, and a sensitive material tip detection sensor 60 is provided at the exit 56.

Directly below the outlet 56, a pair of pressure rolls 62, 64,
A photosensitive material image-receiving paper stacking device comprising a nip roll 66 pressed against a pressure roll 64, and a guide member 68 that guides the image-receiving paper C fed by the pressure roll 64 and the nip roll 66 to the contact portion of the pressure rolls 62 and 64. is placed.

An image-receiving paper supply device [72] is disposed on the side of the photosensitive image-receiving paper stacking device 70. The receiver paper supply device 72 includes a receiver paper supply cassette 74 that protrudes from the housing l and is detachably attached, an image receiver paper feed roll 76 for pushing out the receiver paper C from the cassette 74, and a feed roll. The image receiving paper C fed out by the pressure roll 64
and a guide plate 78 that guides the nip roll 66 to the contact portion. Here, the width of the image-receiving paper C is about 611 smaller than the width of the photosensitive material S, and
In this step, the image receiving paper C is stacked on top of the photosensitive material S so that it is in the center of the photosensitive material S in the width direction.

A pair of pressure nip rolls 80.82 and 80.8 are located below the photosensitive paper stacking device 70.
A transfer device 88 is provided, which includes backup rolls 84 and 86 for equalizing the pressure of the two in the axial direction. Pressure nip roll 80.82 is approximately 500kg/
They are pressed together by the pressure of c-rIL2.

A photosensitive image receiving paper peeling device 90 is provided below the transfer device [88]. The sensitive material image receiving paper peeling device [90 includes a guide member 92, a first feed roll 94, a second feed roll 96, and a first
The peeling strip is wound around guide rolls 98 and 100 so as to come into pressure contact with only the photosensitive material S at both outer end portions on the feed roll 94, and consists of a root 102.

A sensitive material disposal section 104 is provided on one side of the peeling device 90, and a fixing device 106 is provided on the other side. The sensitive material disposal section 104 includes a guide member 108, a pair of feed rolls 110, 112, and a disposal box 114.
The photosensitive material S sent from the peeling device 90 and guided by the guide member 108 is put into the waste box 114 by the feeding rolls 110 and 112.

The fixing device 106 includes a guide member 120 and a reflective member 12.
2 ultraviolet irradiation lamps 124 and a pair of feed rolls 1
26 and 128, and the image receiving paper C sent from the peeling device 90 and guided by the guide member 120 is irradiated with ultraviolet light for about 5 seconds to fix it.

A take-out tray 130 for receiving the image receiving paper C is attached to the front of the fixing device 106 so as to protrude from the housing 1 .

At the initial operation preparation stage of the image recording apparatus, ie, the copy preparation stage, the tip of the photosensitive material S is positioned near the cutting part of the cutter unit 23 or inside the magazine connection dark box 20. Subsequently, when a copy start button (not shown) is pressed, the photosensitive material drawing roll 22 is operated and the photosensitive material S is fed until the leading end thereof reaches the position 32.

After that, the illumination tube 208 is turned on, and the imaging optical system 208
performs a predetermined scan, and the shutter device 240, which had been closed until now, is opened and the photosensitive material S is exposed.

On the other hand, when the photosensitive material S is fed by a distance equal to the length of the document in the moving direction, the cutter unit 23 is activated to cut the photosensitive material S.

The exposed and cut photosensitive material S is sent to a heat developing device 40, pressed against a heating roll 44 by an endless belt 50, heated at about 120° C., and developed. The passage of the leading edge of the developed photosensitive material S through the outlet 56 is detected by the sensitive material leading edge detection sensor 60 .

In addition, in the image receiving paper supply device 72, the image receiving paper C is fed out in synchronization with the pressing of the copy start button or the timing of exposure start, and the leading end of the image receiving paper C is fed out onto the pressure roll 6.
4 and the nip roll 66, the image receiving paper C is stopped.

In the photosensitive image receiving paper stacking device 70, the small and medium sized image receiving paper C is placed in the widthwise center of the wider photosensitive material S, and the leading edge of the photosensitive material S is aligned with the leading edge of the image receiving paper C. The images are superimposed one on top of the other or several millimeters in advance, and sent to a transfer device [88] where they are pressed with a pressure of about 500 kli'/cm2 and transferred onto image-receiving paper.

FIG. 2 fa) (1)) is a plan view and a side view of the vicinity of the pressure transfer device [88], and shows the relationship between the photosensitive material S and the pressure transfer device 88 for convenience.

A conveyance roll 81 is provided upstream of the two pressure rolls 80 and 82.
．． 83, pressure nip rolls 80.82, and conveyance rolls 81.83 are rotationally driven by motors 85.87, respectively. The driving of the motors 85 and 87 is controlled by the control device 300.

The photosensitive material S overlapped with the image receiving paper C is transferred to the conveyor roll 8.
1.83 in the direction of arrow A, and reaches the pressure nip roll 80.82. Pressure nip roll 80.82
is a direction perpendicular to the conveying direction A, that is, the conveying roll 81
．． The nip rolls 80 and 82 are arranged at an angle θ with respect to the nip rolls 83, and therefore the photosensitive material S is pressed while being fed Km in the direction of arrow B.

At this time, the conveyance rolls 81 and 83 are the pressure nip rolls 8
If the photosensitive material S is controlled to rotate faster than 0.82 mm, the conveyance amount of the photosensitive material S by the conveyance rolls 81.83 is greater than the conveyance amount by the pressure nip rolls 80.82. Therefore, after the pressure nip rolls 80.82 nip the leading edge of the photosensitive material S, the conveyor rolls 81 and 83 overfeed the photosensitive material S to the pressure nip roll 80.82, and Loop S1 of photosensitive material S in between
form.

The front part of the photosensitive material S is conveyed in the direction of arrow B by pressure nip rolls 80.82, and the rear part is conveyed by conveyance rolls 81.83.
Since the pressure nip rolls 80.82 and the transport rolls 81.83 are transported in the direction of arrow A by No excessive force is applied to the material, and no distortion occurs.

Further, since the photosensitive material S gradually bites into the pressure nip roll 80.82 from the corner S2, the pressure nip roll 80.8
Since the pressure nip rolls 80 and 82 separate from each other at the corner S3 without any impact being applied to them, the pressure nip rolls 80 and 82 do not come into sudden contact with each other, and an impact upon separation can be prevented.

Further, the loop S1 of the photosensitive material S can be formed by other methods. That is, when the tip of the photosensitive material S reaches the nip portion of the pressure nip roll 80.82, the rotation of the pressure nip roll 80.820 is temporarily stopped.
The motor 85 rotates only the transport rolls 81 and 83.
．． 87 is controlled. Then, the conveyance of the front part of the photosensitive material S is stopped and the rear part is still conveyed, so that a loop S is formed between the pressure nip roll 80.82 and the conveyance roll 81.83.
l is formed. After a predetermined period of time has elapsed, the photosensitive material S is conveyed while maintaining the loop S1 by rotating at a constant or low speed with the re-pressurizing nip roll 80. Pressure is applied by nip rolls 80 and 82.

The method of the present invention is to control the driving of the pressure nip roll 80.82 and the conveyance roll 81.83.
Pressure nip rolls 80.8
Another conveyor roll 180, 18 is placed upstream parallel to and adjacent to 2.
2 are preferably provided and the transport rolls 180, 182 are preferably controlled in the same manner as the pressure nip rolls 80, 82.

As a result of transporting the photosensitive material S using the method of the present invention, the first transport roll 81.83 and the second transport roll 180.18
2 interval is 85 mm, θ=1°, first conveyor roll 81
The conveyance speed of 83 is 23 i+m/sec, the pressure nip roll 80.82 and the second conveyance roll 180.18
When the conveyance speed of 2 is 20tnx/sec or less,
A loop Sl of the photosensitive material S is formed, and the photosensitive material S is pressurized without wrinkles, and the photosensitive material S is pressed by the press nip roll 80.8.
No impact occurred in 2.

In addition, the first conveyance roll 81.83, the pressure nip roll 8
0.82, the conveying speed of the second conveying roll 180.182 is 85 dragons/sec,, the second conveying roll 180.182
When the rotation of the photosensitive material S was stopped and the loop length formed was 150 nm, the photosensitive material S was similarly pressed without wrinkles, and no impact was generated on the pressure nip rolls 80 and 82.

Here, the inclination angle θ of the pressure nip roll 80.82 and the second conveyance roll 180.182 is generally 05 to 5 degrees, preferably 0.7 to 2 degrees.

Furthermore, the pressing force by the pressure nip roll 80.82 is generally 200 to 600, preferably 400 to 600.
It is 550 kg/cIn.

In the embodiments described above, the method of the present invention is applied to a pressure transfer device of an image recording device using a photosensitive pressure-sensitive heat development material. The present invention is applicable to a transfer device, a pressure fixing device, and a conveyance device, and furthermore, it is applicable to a conveyance device that includes a commonly used pressure process.

〔Effect of the invention〕

According to the present invention, the recording material is fed diagonally relative to the pressure roll, and even if the front and rear parts of the recording material are conveyed in different directions, the recording material is not formed between the pressure roll and the conveyance roll. Since the loops of recording material that have been formed allow tension in different directions, no distortion occurs. Therefore, the recording material is not wrinkled due to pressure, and good conveyance is ensured.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the image recording device, Figures 2 (a) and (b)
FIG. 2 is a plan view and a side view in the conveying direction showing the relationship between the transfer device and the photosensitive pressure-sensitive thermal development material. Symbols in the figure: S...Photosensitive pressure sensitive heat development material C...Receiving paper L.
...Housing 2...Document support glass 12...
Sensitive material roll 14...Sensitive material cartridge 16...
Exit 22...Sensitive material removal roll 23...
・Cutter unit 24...Guide 9 plate 26...
・Exposed photosensitive material support roll 28.30...Sensitive material nip roll 32...Exposure position 40...Heat developing device 42・
...Development housing 44...Heating roll 46.4
7, 48, 49...Belt support roll 50...Endless heald 52...Nip roll 54...Guide 9 device 56...Outlet 58...Vertical guide device 60...Sensitive material tip detection sensor 62.64...Pressure roll 66...Nip roll 68...Guy 1 member 70...Sensitivity image receiving paper stacking device 72...Image receiving paper supply device 74...Image receiving paper supply cassette 76. ...Receiving paper feed roll 78...Guide plate 80.82...Pressure nip roll 81.83...Conveyance roll

Claims (1)

[Scope of Claims] 1) A method of conveying a recording material while pressurizing it in an image recording apparatus, which method includes conveying the recording material under pressure using a pressure roll installed diagonally with respect to the conveyance direction. . A method for conveying a recording material, comprising forming a loop of the recording material between the pressure roll and a conveyance roll upstream thereof, and conveying the recording material while maintaining the loop. 2) The recording material transport method according to claim 1, wherein a loop of the recording material is formed by making the transport speed of the transport roll faster than the transport speed of the pressure roll. 3) A loop of the recording material is formed by temporarily stopping the rotation of the pressure roll, bringing the leading end of the recording material into contact with the pressure roll, and continuing transport by the transport roll. A recording material conveying method according to claim 1.