JPH01138559A - Image recorder - Google Patents

Abstract

PURPOSE:To eliminate the traced a roller on a sheet by applying pressure to a conveying roller pair when image recording actions are performed or a power source is turned on, thereby holding and conveying the photosensitive sheet and permitting a roller moving means to move the rollers in their pressure release direction in other cases. CONSTITUTION:When the power source is turned on, or the image forming actions start, a solenoid 2 is conducted, which leads a coupler plate 101 to attract to the solenoid 2. Arms 103-105 rotate to move the rollers 5, 7 and 8 among which pressure occurs. The photosensitive sheet S is held by the rollers 5, 7 and 8, and is ready for conveyance. On the contracty, when the power source is turned off, or the image recording actions stop, the conduction of the solenoid 2 is stopped, and the rollers 5, 7 and 8 are moved. By releasing the pressure among the rollers 5, 7 and 8, the conveyance of the photosensitive sheet S is stopped. Thus the conveying the trace of the roller appearing on an image can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image recording apparatus using rolled sheet material.

[Technical background of the invention and its problems 3 Many image recording devices have been proposed.
A recording material disclosed in the specification No. 2, wherein at least a photosensitive silver halide, a reducing agent, a polymerizable compound, and a color image forming substance are coated on a support, and the polymerizable compound and the color image forming substance are coated on a support. There is an image recording apparatus that uses a photosensitive and pressure sensitive material consisting of a photosensitive composition encapsulated in at least the same microcapsule as the image forming substance. Regarding the image recording method of recording an image using this photosensitive and pressure sensitive material, please refer to Japanese Patent Laid-Open No. 61-278849 filed by the present applicant.
It is disclosed in the specification of No.

As shown in FIG. 5, the apparatus using this image recording method first applies an exposure section 3 to a photosensitive material S pulled out from a magazine 4.
imagewise exposure is performed to form a latent image, and then development is performed using a heat developing device 12 to polymerize the polymerizable compound in the area where the latent image is present to form a high molecular compound and harden the microcapsules. Next, an image-receiving material C having an image-receiving layer to which a color image-forming substance can be transferred and a photosensitive material S are overlapped in an overlapping section 19 and pressed by a pressure transfer device 22 to form microcapsules in areas where no latent image exists. rupture at least a portion of the color image-forming material C to transfer the color image-forming substance to the image-receiving material C to obtain an image on the image-receiving material. In an apparatus using a rolled sheet material as described above, in order to extract and transport the photosensitive material S from the magazine 4, the photosensitive material transport path between the magazine 4 and the exposure section 3 has a certain length of photosensitive material S. It is necessary to keep it extended even when image recording is paused.

If the image recording is stopped or the power of the device itself is turned off for a long time, the portion of the photosensitive material S that is fed out will continue to be pressed at the same location by the conveyance roller for a long time, and if the image continues to be recorded, the first sheet will be Traces of the roller appeared in the image, resulting in image unevenness.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide an image recording apparatus that does not leave traces of conveyance rollers on a sheet material.

[Means for solving problems]

The present invention has the above-mentioned object in an image recording apparatus using a rolled sheet material, which includes a plurality of pairs of conveying rollers disposed to feed out the rolled sheet material and stopping it at a predetermined position, and pressure applied between the pairs of conveying rollers. This is achieved by a configuration including roller moving means capable of moving at least one of the plurality of rollers in the release direction.

That is, during image recording operation or when the power is on, pressure is applied between the pair of conveyance rollers to carry out nip conveyance, and when image recording is stopped or the power is off, the roller moving means moves the pair of conveyance rollers between the pair of conveyance rollers. The roller moving means is operated according to the operational status of image recording, such as moving the roller in the pressure release direction.

The present invention can be used in many types of image recording apparatuses using pressure-sensitive, heat-sensitive, etc., roll-shaped sheet materials.

Furthermore, it is also possible to automatically control the operation of the roller moving means described above using a desired operation signal of the image recording apparatus.

[Embodiment]

The present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view of the image recording apparatus. The upper surface of the housing 1 is equipped with a transparent supporting glass plate 2 on which a document is placed.
An exposure section 3 is provided below the glass plate 2. The exposure section 3 is fixed within the housing 1, and the glass plate 2 is reciprocated in the horizontal direction indicated by arrow A over the exposure section 3 by a driving means (not shown).

The photosensitive material S is wound into a roll and stored in the magazine 4, and is drawn out from the magazine 4 by a pair of feeding rollers 5. This magazine 4 is attached and detached using the upper cover 37.
This is done after rotating it around its right end to open it. The photosensitive material S pulled out from the magazine 4 is transferred to the conveying roller 7.
8.9, it is transported to the exposure section, and is cut into a predetermined length by the cutter 6 while being exposed.

The photosensitive material S having the exposed image and cut into sheets is then conveyed to the heat developing device 12 by conveying rollers 10.11.

The heat developing device 12 includes a hollow cylindrical heating roller 14, four belt support rollers 15, and a belt extending from the support rollers 15 at an angle of about 240° to the outer periphery of the heating roller 14 in a heat insulating housing 13. The photosensitive material S is conveyed while being sandwiched between the belt 16 and the heating roller 14, and heated at about 120 degrees by a halogen lamp 17 provided in the heating roller 14.

The housing 13 is heated and developed by the heat developing device 12.
The photosensitive material S discharged from the photosensitive material S is transported by a transport roller 18 to a superimposing section 19, where it is overlapped with an image receiving paper C fed from an image receiving paper cassette 20 or a manual feed section 21, and is transported to a pressure transfer device 22.

The pressure transfer device 22 includes a pair of pressure rollers 23 that are in pressure contact with each other,
It consists of a backup roller 24 that is in pressure contact with each pressure roller 23, and a blade 72 is provided at the entrance to prevent the photosensitive material S and image receiving paper C from wrinkling. are in contact with each other. The weight of the superimposed photosensitive material S and image receiving paper C is approximately 550 kg/ca! Pressurized at a pressure of

When the image recorded on the photosensitive material S is transferred to the image receiving paper C, the superimposed photosensitive material S and the image receiving paper C are conveyed to a peeling device 25.

The peeling device 25 consists of a conveyance roller 26 and a peeling claw 27, and when the peeling claw 27 swings downstream of the conveyance roller 26, its tip enters between the photosensitive material S and the image-receiving paper C and peels them off. .

The photosensitive material S peeled off from the image receiving paper C by the peeling device 25 is conveyed to the waste tray 31 by conveyance rollers 28, 29, 30, discarded, and stored. On the other hand, the image-receiving paper C on which the image has been transferred is separated from the photosensitive material S and then transported to the fixing device 33 by the transport roller 32 .

The image-receiving paper C is then irradiated with ultraviolet rays by, for example, an ultraviolet lamp 34 provided in the fixing device 33 to fix the image thereon, and is sent onto a take-out tray 36 by a conveying roller 35.

FIG. 2 shows an enlarged view of a roller moving device mainly composed of a connecting plate and an arm along the conveyance path from the magazine 4 to the exposure section 3. A pair of feeding rollers 5
And one of the rollers of the conveyance roller 7.8 has square-shaped arms 103, 104, 1 facing in the same direction on the support shaft, respectively.
05 is connected. This arm 103, 104, 1
05 is the bent part and pivots l-106, 10
7° 108, and further connected by a connecting plate 101 on the opposite side to the rollers. Connecting plate 101
A spring 112 is connected to one end, and a solenoid 102 is connected to the other end.

At the connecting portion of the connecting plate 101 with the arms 103, 104, and 105, elongated holes 120, 121, and 122 shown in FIG.
, 104, 105, respectively.
10 and 111 are slidably connected.

In the case of this image recording apparatus, a leading edge detection sensor SW is provided downstream of the exposure section 3, and the leading edge of the photosensitive material S is stopped at the position of this sensor SW when image recording is stopped.

When the image recording device is powered off, solenoid 10
2 is not energized, the connecting plate 101 is pulled by the spring 112, and the arms 103, 104, 105 move around the pivots 106, 107° 108 to the stopper 1.
By rotating up to 30 degrees, the feed roller 5 and the conveying roller 7.8 are moved and the pressure between each pair of rollers is maintained in a released state. At this time, since the conveying roller 9 always holds the leading edge of the photosensitive material S where no image is recorded, the leading edge of the photosensitive material does not shift.

Next, when the power of the image recording apparatus is on, the solenoid 102 is energized when the power is turned on or the start switch of the image recording operation is turned on, and the connecting plate 101 is thereby pulled by the solenoid 102. , the arms 103, 104, 105 rotate and each roller moves,
Pressure is generated between each pair of rollers, and the conveyance becomes possible.

In addition, the timing for releasing the pressure may be other than when the power is turned off as described above.After the image recording operation described above is completed, the energization to the solenoid 102 is stopped, and the rollers 5, 7.8 are moved. It can also relieve pressure between pairs. Furthermore, without using the above-mentioned connecting plate 101, a solenoid may be directly connected to each arm or each roller and controlled at the above-mentioned timing.

FIG. 4 is a diagram showing another embodiment of the roller moving means.

Here, in order to make only the transport roller 5 closest to the magazine 4 movable, the dogleg arm 140° solenoid 1
42. One combination of springs 144 is attached to the transport roller 5 as in the previous embodiment. A photosensitive material sensor SW+ is placed immediately after the conveyance roller 7 at a distance of 1°, and a photosensitive material sensor SW2 is placed immediately after the conveyance roller 9 at a distance of 1□. The exposure device 3 exposes the photosensitive material S at a position where the photosensitive material S is sensed by the sensor SW2 and stopped at the same time. Therefore, during continuous image recording, exposure is performed continuously at the timing when the sensor SW2 senses the photosensitive material S.

Since the solenoid 142 is always energized during this image recording, pressure is generated between the pair of transport rollers 5, and there is a transport capability. When the last photosensitive material S of the designated recording number is cut by the cutter 6, the sensor SW1 detects the leading edge of the photosensitive material S extending from the magazine and at the same time stops driving the conveying rollers 5 and 7.
Since it stays at the detected position while being held between the conveyor rollers, the leading edge does not shift. Then, when the energization to the solenoid 142 is stopped, the spring 144 is compressed and the pressure between the pair of conveying rollers 5 is released. Therefore, no trace of the roller 5 is left behind. Also, by making the distance 1 equal to or shorter than the distance 1□, the conveying roller 7
The trace can be located outside the exposure frame of the photosensitive material S.

〔Effect of the invention〕

As described above, by providing the conveyance roller moving means at the sheet material feeding stop position and releasing the pressure on the sheet material from the conveyance roller when the image recording operation is stopped,
Traces of conveyance rollers appearing on images can be eliminated.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an image recording device showing one embodiment of the present invention, Fig. 2 is a partial sectional view showing a part of the sheet material conveyance path from the magazine, and Fig. 3 is the connection between the connecting plate and the arm. FIG. 4 is a sectional view showing a part of a sheet material conveyance path from a magazine in another embodiment, and FIG. 5 is a schematic diagram of a conventional image recording apparatus. Symbol in the figure 1...Housing 2...-Glass plate 3 Exposure device 4
-・Magazine 5-・Feeding roller 6 Cutter 7.
8.9.10.11--Conveyance roller 12...Heat developing device 13--Housing 14-Heating roller 15
- Belt support roller 16 - Belt 17 - Halogen lamp 18 - Conveyance roller 19 - Overlapping section 20... Receiving paper cassette 21... Manual feed section 22 - Pressure transfer device 2
3-Pressure roller 24 Backup roller 25 Peeling device 26 Conveyance roller 27 Peeling claw 28, 29, 30 Conveyance roller 31 -- Waste tray 32 Conveyance roller 33 --Fixing device 34 Ultraviolet lamp 35 Conveyance roller 36 Take-out tray 37 -・Top cover 101・Connecting plate 102.142
Solenoid 103.104, 105.140/dog-shaped arm 10
6.107, 108・Pivot 109.110,11 Top pin 112.144・−Spring 120.121.122−・・Length 130−・Stopper SW, SW2・Tip detection sensor ll −Roller 7 and sensor SW + Distance 1□ - Distance S between roller 9 and sensor SW2...Photosensitive material C...Image receiving material

Claims (1)

[Claims] 1) In an image recording apparatus using rolled sheet material, a plurality of pairs of conveyance rollers arranged to feed out the rolled sheet material and stop it at a predetermined position; An image recording apparatus comprising: roller moving means capable of moving at least one of the plurality of rollers in a pressure release direction. 2) At least one pair of the conveyance rollers that clamp the tip of the rolled sheet material when the rolled sheet material is stopped at a predetermined position are not connected to the roller moving means and always clamp the sheet material. An image recording apparatus according to claim 1, characterized in that the image recording apparatus has the following configuration. 3) The roller moving means releases the pressure between the pair of conveying rollers connected to the roller moving means only when image recording is stopped or paused. Image recording device.