JPH02277052A - Image recording device - Google Patents

Abstract

PURPOSE:To eliminate soiling without generating image uneveness due to a difference in rotating speed of a drum and a belt by abutting a cleaning material to the drum only when a recording material is not carried between the drum and a pressuring belt. CONSTITUTION:A photosensitive material and an image receiving material are crimped, carried, and processed between an endless pressuring belt 118 which is rotated by rotating a wrapping roller 140 and a heating drum 116 which is followingly rotated by frinction power from the rotation of the belt 118, and both materials are stripped apart by stripping claws 154 and 176, etc. When the stripping of the image receiving material is detected by the image receiving material sensor is 177, a cam 204 is rotated, an arm 202 is pressured, and a cleaning blade 200 is pushed to the outer periphery of the drum eliminating the soiling of the outer peripheral surface. When the carrying of the next image receiving material is detected by a specified roller, the cam 204 is rotated again and the pressured condition of the arm 202 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Fields] The present invention records images by wrapping an image recording material tightly around the outer periphery of the drum as the drum rotates, and conveying the material by sandwiching it between an endless pressure belt. The present invention relates to an image recording device that performs processing.

[Prior Art] Image recording apparatuses are known that perform image recording processing by wrapping an image recording material around the outer periphery of a drum.

In this type of image recording apparatus, for example, a photosensitive material and an image receiving material are used as image recording materials, and the drum is a heating drum. A portion of the outer periphery of an endless pressure belt wound around a plurality of wrapping rollers is pressed onto the outer periphery of the heating drum. The photosensitive material on which the image has been exposed is coated with water as an image-forming solvent, and then superimposed on the image-receiving material. In this state, the material is tightly wound around the outer periphery of a heating drum, and both materials are then brought into endless pressure contact with the heating drum. The photosensitive material is thermally developed while being conveyed while being held between the belt and the image is transferred to the image receiving material.

Here, in the endless pressure contact belt and the heating drum that rotate while being pressed against each other, shearing force is generated between the photosensitive material and the image receiving material that are being conveyed in a pinched manner, causing the two materials to shift and cause image unevenness (
It is necessary that there be no difference in rotational speed between the two so that transfer misalignment does not occur.

In this case, the heating drum is connected to a drive source such as a motor to rotate, and the rotational force of the heating drum is transmitted by the frictional force between it and the endless pressure belt, so that the endless pressure belt rotates along with the heating drum. If this is done, a difference in rotational speed will occur.

In other words, the endless pressure belt that is pressed against the outer periphery of the heating drum is wound around a plurality of winding rollers having a relatively small diameter (in other words, the winding portion of the endless pressure belt has a large curvature, and (as it is bent at multiple points), it has a large resistance to rotational driving force. Therefore, the rotational force due to friction between the heating drum and the heating drum is not sufficiently transmitted (some of the rotational force is lost), and a difference in rotational speed occurs between the driven rotating endless pressure welding belt and the heating drum.

On the other hand, it is possible to rotate both the heating drum and the endless pressure welding belt by connecting them to a drive source, but if a single drive source is connected to each part by gears, chains, etc., dimensional errors in the connected parts may occur. It is extremely difficult to accurately match the rotational speeds of the heating drum and the endless pressure belt due to the
It is necessary to make the rotational speeds of each drive source (motor) the same, and in this case, it is extremely difficult to accurately match the rotational speeds of the heating drum and the endless pressure belt.

For this reason, in the past, the rotational driving force of the drive source was applied to one of the plurality of winding rollers around which the endless pressure-welding belt was wound to rotate the endless pressure-welding belt, and the rotational force of the endless pressure-welding belt was applied to the heating drum. The heating drum is rotated by the frictional force between the heating drum and the heating drum.

[Problems to be Solved by the Invention] As described above, since the photosensitive material and the image receiving material are tightly wound around the outer periphery of the heating drum after being coated with water, gelatin, etc. contained in the photosensitive material may be There is a problem in that chemicals and dust adhere to the outer peripheral surface of the heating drum during image recording processing. In particular, when a photosensitive material larger than the image-receiving material is used to form an image on the entire surface of the image-receiving material, the periphery of the photosensitive material that protrudes from the periphery of the image-receiving material comes into direct contact with the heating drum. The tendency of adhesion is remarkable. Therefore, if the adhered gelatin or the like is left as it is, the image-receiving material will become dirty, and the photosensitive material or image-receiving material will be difficult to peel off from the heating drum after image transfer.

In this case, if the cleaning blade is simply pressed against the outer periphery of the heating drum in order to remove dirt from the outer periphery of the heating drum, this pressing force becomes rotational resistance of the heating drum, and the heating drum rotates as a result of the frictional force and the endless pressure contact belt. A difference in rotational speed occurs between the two. Therefore, in this case, a shearing force is generated between the photosensitive material and the image-receiving material that are sandwiched and conveyed by the endless pressure belt and the heating drum, causing the two materials to shift, resulting in image unevenness (transfer misalignment).
occurs.

In consideration of the above facts, the present invention has been developed to remove dirt attached to the outer periphery of the drum without causing image unevenness (transfer misalignment) caused by the rotational speed difference between the drum and the endless pressure belt that presses against a part of the outer periphery of the drum. The objective is to obtain an image recording device that can be removed.

[Means for Solving the Problems] An image recording device according to the present invention is wound around a plurality of winding rollers and is driven by a rotational driving force of a drive source applied to one of the plurality of winding rollers. A rotating endless pressure welding belt, and a drum whose outer periphery is in pressure contact with a portion of the outer periphery of the endless pressure welding belt, and the drum is rotated as a result of the rotational force of the endless pressure welding belt being transmitted by the frictional force between the endless pressure welding belt and the endless pressure welding belt. an image recording apparatus which performs an image recording process by wrapping two different image recording materials tightly around the outer periphery of the drum as it rotates, and conveying the two sheets while sandwiching them between the drum and the endless pressure belt, the image recording apparatus comprising: A cleaning member that is arranged to be able to come into contact with and be separated from the outer periphery of the drum and that cleans the outer periphery of the drum while in contact with the outer periphery of the drum, and the image recording material is not conveyed while being held between the drum and the endless pressure belt. The present invention is characterized in that it includes a moving means for moving the cleaning member and bringing it into contact with the outer periphery of the drum only when the cleaning member is in contact with the outer periphery of the drum.

[Function] In the image recording apparatus configured as described above, the endless pressure belt is rotated by one winding roller that is given the rotational driving force of the drive source, and the rotational force of the endless pressure belt is further applied to the rotation between the belt and the drum. The drum is rotated as a result of the frictional force.

Here, if the image recording material is not being held and conveyed between the drum and the endless pressure belt, the cleaning member is moved by the moving means and comes into contact with the outer periphery of the drum. For this reason,
Dirt on the outer surface of the drum is forcibly removed.

When the image recording material is sandwiched and conveyed between the drum and the endless pressure belt and image recording processing is started, the cleaning member is moved again by the moving means and separated from the outer periphery of the drum. Therefore, the cleaning member does not become a rotational resistance of the drum, and no difference in rotational speed occurs between the endless pressure belt and the heating drum.

Therefore, shearing force is not generated between the photosensitive material and the image-receiving material, which are sandwiched and conveyed by the endless pressure belt and the heating drum, and the two materials do not shift, and image unevenness (transfer misalignment) does not occur. An image is obtained. Furthermore, since dirt on the outer circumferential surface of the drum is forcibly removed, the image recording material is not stained. Also, after recording the image,
The image recording material does not come into close contact with the heating drum unnecessarily and can be easily peeled off.

Embodiment FIG. 2 shows a schematic overall configuration diagram of an image recording apparatus 10 according to an embodiment of the present invention.

A photosensitive material magazine 14 is arranged on the machine base 12 of the image recording apparatus 10, and a photosensitive material 16 is wound up into a roll and stored therein. The photosensitive material 16 has a photosensitive silver halide, a binder, a dye-providing substance, and a reducing agent on a support, and is wound up with its light-sensitive (exposed) surface facing downward of the apparatus. On the side of the photosensitive material magazine 14,
A nip roller 18 and a cutter 20 are arranged for pulling out the photosensitive material 16 from the photosensitive material magazine 14 and cutting it into a predetermined length.

An exposure section 22 is arranged on the side of the cutter 20. A conveyance roller 24 and a conveyance roller 26 are arranged in the exposure section 22, and the space between these conveyance rollers serves as an exposure section (exposure point) through which the photosensitive material 16 passes.

Further, a guide plate 28 is disposed between these conveyance rollers, and an exposure surface glass 30 is disposed above the conveyance path of the photosensitive material 16, so that the photosensitive material 16 becomes flat (corrects deformation). between both transport rollers (while
(exposure area). A flapper 36 is arranged on the side of the exposure section 22 (on the side opposite to the photosensitive material magazine 14) to constitute a reversing section 34, and the photosensitive material 16 is once transferred to the exposure section 2.
After passing through 2, it is reversed at a reversing section 34 and guided to the exposure section 22 again.

An exposure device 38 is provided directly above the exposure section 22.

The exposure device 38 includes a light source 40, movable mirrors 42A, 42
B. A plurality of fixed mirrors 44, a reflective mirror 46, and a lens unit 48 are arranged, and a glass original placing plate 50 is provided above the machine stand 12 above these parts. Further, an aperture slit plate 52 is arranged at a predetermined interval on the front side of the lens unit 48 (on the movable mirror 42A142B side). These light source 40, movable mirrors 42A, 42B, and lens unit 48 are movable along the document placement plate 50.
The original 54 placed on the original placing plate 50 is irradiated with light, and the reflected image light (image light) is scanned and exposed onto the photosensitive material 16 located in the exposure section 22 via a plurality of fixed mirrors 44. It has become.

The reflecting mirror 46 is arranged so as to be able to enter or leave the optical path of the image light irradiated onto the exposure section 22 via the above-mentioned moving mirror 42A142B or fixed mirror 44. When the reflecting mirror 46 enters the optical path of the image light, the reflected light is made to enter the light detection sensor 56. The light detection sensor 56 measures the image density of the image on the original 54, and based on this measurement value, the color adjustment filter (CC filter) and the aperture slit plate 52 are adjusted.
Exposure conditions are set.

A cooling fan 58 is arranged on the side of the exposure section 22 (on the opposite side from the photodetection sensor 56), and the temperature of the exposure section 22 is kept at 4.
It is cooled to 0° C. (preferably 35° C. or lower) and prevents the document surface temperature from increasing.

The side of the conveyance roller 24 of the exposure section 22 (the side of the photosensitive material magazine 14
A flapper 37 is arranged on the side), and further, an inversion section 60 is formed below the flapper 37.

Also, on the side of the reversing section 60 (the side opposite to the photosensitive material magazine 14)
A water application section 62 is arranged below the reversing section 34 . The photosensitive material 16 on which the image has been exposed in the exposure section 22 is transferred to the reversing section 60 by switching the flapper 37 upward.
After being conveyed to the
9.31.33.35 to be sent to the water application section 62. A squeeze roller 68 is arranged in the water application section 62 to remove excess water from the photosensitive material 160 fed thereto.

A thermal development transfer section 104 is disposed on the side of the water application section 62, and the water application section 62 is placed next to the water application section 62 (after passing through the squeeze roller 68).
A photosensitive material 16 is fed.

On the other hand, a receiving material magazine 106 is arranged on the machine base 12 directly below the photosensitive material magazine 14, and an image receiving material 108 is wound up into a roll and stored therein.

The widthwise dimension of the image-receiving material 108 is smaller than that of the photosensitive material 16, and the image forming surface is coated with a dye fixing material having a mordant. A nip roller 110 and a cutter 112 are arranged on the sides of the receiving material magazine 106 for pulling out the image receiving material 108 from the receiving material magazine 106 and cutting it into a predetermined length.

A plurality of conveyance rollers 114 are arranged on the sides of the cutter 112 to convey the cut image-receiving material 108 to the thermal development transfer section 104 .

As shown in detail in FIG. 1, the thermal development transfer section 104 is composed of a heating drum 116 and an endless pressure belt 118, and a bonding roller 120 is arranged on the outer periphery of the heating drum 116 on the side of the water application section 62. has been done.

Further, a guide plate 122 is disposed between the bonding roller 120 and the squeeze roller 68 of the water application section 62 above the conveyance path of the photosensitive material 16.
The photosensitive material 16 sent from the photosensitive material 8 is guided to a bonding roller 120 corresponding to the back surface (the side opposite to the image forming surface). The guide plate 122 has irregularities formed on its surface by embossing, thereby reducing friction with the photosensitive material 16 after being coated with water.

On the other hand, an image receiving material sensor 123 and a blade guide 124 are arranged between the bonding roller 120 and the conveying roller 114 for the image receiving material 108 . Image receiving material sensor 12
3 is connected to the control circuit 199, and the transport roller 11
4 can be detected. Further, the blade guide 124 guides the image receiving material 108 sent from the conveying roller 114 to the bonding roller 120 .

The surface of the blade guide 124 is treated with Teflon (or a Teflon tape is applied) to improve the slippage of the image receiving material 108 and prevent it from being scratched.

In addition, with respect to the conveyance speed of the photosensitive material 16 and image receiving material 108 by the bonding roller 120,
The conveyance speed of photosensitive material 16 and image receiving material 108 is set to be about 2% slower.
Back tension is applied to the sheet when it is fed to the bonding roller 120. Note that a one-way clutch (not shown) is attached to the drive shafts of the space roller 68 and the conveyance roller 114 to maintain a predetermined tension.

The bonding roller 120 is a crown roller whose outer peripheral surface is coated with silicone rubber.

The heating drum 116 is made of a thin-walled aluminum pipe, the surface of which is coated with Teflon, and the inner peripheral surface of which is coated with heat-resistant black paint.

The image receiving material 108 conveyed to the thermal development transfer section 104 is synchronized with the conveyance of the photosensitive material 16, and is transferred to the bonding roller 120 and the heating drum 116 with the photosensitive material 16 leading by a predetermined length (20 mm in this embodiment). It is designed to be sent in between and overlapped.

A pair of halogen lamps 1 are installed inside the heating drum 116.
32A and 132B are arranged. halogen lamp 1
32A and 132B have outputs of 800W and 400W, respectively, and heat the surface of the heating drum 116 to approximately 78°C.
The temperature can be raised to . In this case, both the two halogen lamps 132A and 132B are used at the start of temperature rise, and only the 800 W halogen lamp 132A is used during normal operation thereafter.

An endless pressure-welding bell (11) that presses against the outer periphery of the heating drum 116
8 has a structure in which a woven fabric material is coated with rubber. The woven material is sewn with heat-resistant fibers such as aromatic polyamide fibers (for example, Kevlar or Nomex, both registered trademarks of du Pont), and monofilament fibers are used in the width direction of the belt. Improves rigidity in the belt width direction. In addition, the rubber for the coating is silicone rubber containing carbon.
It has electrical conductivity.

This endless pressure belt 118 is wrapped around four rollers 1
It is wrapped around 34.136.138.140,
The endless outer side between the winding roller 134 and the winding roller 140 is pressed against the outer periphery of the heating drum 116.

The winding rollers 134, 136, and 138 are made of aluminum, and flanges for preventing the belt from shifting are formed at both ends in the axial direction.

Further, the winding roller 136 has two ends at each end in the longitudinal direction. 5kg (practical range is 0.5~
3.0 kg) is applied in the direction away from the heating drum 116, thereby causing the endless pressure belt 118 to move away from the heating drum 116.
is held at a predetermined tension.

On the other hand, the winding roller 140 is a rubber roller, and a motor (not shown) as a drive source is connected to its rotating shaft. Therefore, the driving force of the motor is directly transmitted to the winding roller 140.
40 is rotated, and as a result, the rotational force of the endless pressure belt 1180 is applied to the heating drum 116 by the frictional force between the endless pressure belt 1180 and the heating drum 116.
The heating drum 116 is rotated in a passive manner. Further, when the heating drum 116 rotates, a bonding roller 120 disposed in pressure contact with the outer periphery of the heating drum 116 similarly rotates together due to frictional force.

The photosensitive material 16 and the image-receiving material 108 which have been superimposed by the bonding roller 120 are passed around approximately 1/2 of the circumference of the heating drum 116 (around the wrapping roller 134
and the winding roller 140). When the photosensitive material 16 is heated during this nipping and conveyance, it releases a mobile dye, and at the same time, this dye is transferred to the dye fixed layer of the image-receiving material 108 to obtain an image.

A bending guide roller 142 and a peeling claw 1 are provided at the bottom of the heating drum 116 on the downstream side of the endless pressure belt 118 in the material supply direction.
54 are arranged. Of the photosensitive material 16 and image-receiving material 108 that are sandwiched and conveyed between the endless pressure belt 118 and the heating drum 116, the peeling claw 154 engages only the leading end of the photosensitive material 16 that is overlapped with a predetermined length ahead. The leading end portion can be peeled off from the outer periphery of the heating drum 116, and the bent guide roller 142 wraps around and guides the peeled photosensitive material 16.

A cutter 180 for cutting the photosensitive material 16 and a waste photosensitive material storage box 178 are arranged below the peeling claw 154, and cut the photosensitive material 16 peeled from the outer periphery of the heating drum 116 and separated from the image receiving material 108 into small pieces. The photosensitive materials can be collected in the waste photosensitive material storage box 178.

A drying fan 182 is arranged on the side of the peeling claw 154 for blowing air to the image receiving material 108 to dry it.

A peeling roller 174 and a peeling pawl 176 are arranged above the peeling pawl 154 and near the heating drum 116 to peel off the image receiving material 108 that is separated from the photosensitive material I6 and moves together with the heating drum 116 from the outer periphery of the heating drum 116. It has become. An image-receiving material sensor 177 is arranged on the conveyance path of the image-receiving material 108 on the side of the peeling roller 174. The image receiving material sensor 177 is connected to a control circuit 199,
The image receiving material 108 can be detected after being peeled off by the peeling roller 174 and the peeling claw 176.

The peeled image-receiving material 108 is collected on a tray 184.

A felt cleaning blade 200 serving as a cleaning member is supported by an arm 202 near the heating drum 116 above the peeling claw 176 . The arm 202 has elasticity, and by elastic deformation, the cleaning blade 200 can come into contact with the outer peripheral surface of the heating drum 116. A cam 204 as a moving means is arranged on the side of the arm 202. Cam 204 is control circuit 1
99, and is rotated by an activation signal from the control circuit 199. The cam 204 can press the arm 202 by rotating, thereby elastically deforming the arm 202 and bringing the cleaning blade 200 into contact with the outer peripheral surface of the heating drum 116 . The cam 204 rotates and presses the arm 202 when the photosensitive material 16 and the image receiving material 108 are not being held and conveyed between the heating drum 116 and the endless pressing bell 118. That is, the image receiving material 1 is removed by the peeling claw 176.
08 is peeled off from the outer periphery of the heating drum 116, the cam 204 rotates and presses the arm 202, bringing the cleaning blade 200 into contact with the heating drum 116.
Further, the photosensitive material 16 and the image receiving material 108 are pasted together by a roller 120 and a heating drum 1 for the next thermal development transfer process.
At the point when the cam 2 is sent in between the
04 rotates again, and the arm 202 is brought into a state where the pressure is released (a state in which the cleaning blade 200 is not in contact with the heating drum 116).

Next, the operation of this embodiment will be explained.

The photosensitive material 16 pulled out from the photosensitive material magazine 14 by the nip roller 18 is cut into a predetermined length by the cutter 20 and then conveyed to the exposure section 22. Further, after cutting, the nip roller 18 is reversely rotated, and the pulled out photosensitive material 16 is rewound into the photosensitive material magazine 14. Therefore, the leading end of the photosensitive material 16 is not wasted and is not exposed inadvertently.

The cut photosensitive material 16 is conveyed by a conveyance roller 24 and a conveyance roller 26 and once passes through an exposure section 22,
This leads to flapper 36. Here, the flapper 36 enters and blocks the transport path of the bifurcated photosensitive material 1I1416 located on the lower side of the apparatus, thereby transferring the photosensitive material 16 to the upper side of the apparatus of the flapper 36. Guide to the transport route located at .

Further, the guided photosensitive material 16 is reversed in the reversing section 34 so that its photosensitive (exposure) surface faces upward, and then conveyed from the flapper 36 to the exposure section 22 again. When the photosensitive material 16 is nipped by the conveying roller 26, the driving of the conveying roller 26 is temporarily stopped, and the photosensitive material 16 is placed in a standby state immediately before the exposure section 22.

On the other hand, while the photosensitive material 16 is being conveyed, a pre-scan of the original 54 is performed.

That is, first, the light source 40 is activated, and the reflection mirror 46 enters the optical path of the image light irradiated to the exposure section 22, and the light irradiated via the movable mirrors 42A, 42B and the fixed mirror 44. is reflected in an approximately perpendicular direction. The reflected light is incident on the light detection sensor 56 and detected, thereby determining the image density of the image on the original 54 (in other words, whether the image on the original 54 is like a printed original or a photographic original). is measured, and the exposure conditions for the color adjustment filter (CC filter) and the aperture slit plate 52 are set based on this measured value.

Next, the reflection mirror 46 leaves the optical path of the image light, and the light source 40, moving mirror 42A142B, and lens unit 48 return to the home position (image scanning start position).

Here, the driving of the conveyance roller 24 and the conveyance roller 26 is started again, and the photosensitive material 16 is moved from the exposure section 22 by 100 m.
It passes at a speed of rn/sec. In this case, since the guide plate 28 and the exposure surface glass 30 are arranged in the exposure section 22, the photosensitive material 16 passes between both transport rollers (the exposure section) in a flat shape (while the deformation is corrected). .

At the same time as this photosensitive material 16 is transported (passing through the exposure section 22), the light source 40, movable mirrors 42A, 42B, and lens unit 48 move along the original plate 50 and are placed on the original plate 50. The reflected image light (image light) passes through a plurality of fixed mirrors 44 to the exposure unit 2.
The photosensitive material 16 located at 2 is scanned and exposed.

In this case, since the exposure section 22 is forcibly cooled by the cooling fan 58, exposure failures due to temperature rise will not occur.

When the exposure starts, that is, the driving of the conveyance rollers 24 and 26 is resumed, the flapper 37 is switched upward, and the exposed photosensitive material 16 is thereby conveyed to the reversing section 60 one after another. Further, the photosensitive material 16 is reversed in the reversing section 60 (that is, the image-exposed surface is directed downward) and then sent to the water application section 62 by the conveying rollers 29, 31, 33, 35.

In the water application section 62, water is applied to the photosensitive material 16, and the photosensitive material 16 passes through the water application 162 while excess water is removed by a squeeze roller 68.

The photosensitive material 16 coated with water as an image forming solvent in the water coating section 62 is sent to the thermal development transfer section 104 by a squeeze roller 68 .

On the other hand, the image receiving material 108 is also pulled out from the receiving material magazine 106 by the nip roller 110, and is further pulled out by the cutter 112.
After the photosensitive material 16 is cut into a length shorter than the photosensitive material 16, it is transported by a transport roller 114 to the thermal development transfer section 1.
Sent to 04.

Further, after cutting, the nip by the nip roller 110 is released, and deformation of the leading end (image forming surface) of the image receiving material 108 due to being nipped for a long time is prevented.

Here, FIG. 3 shows a flowchart of the subsequent operation of the cam 204 (cleaning blade 200). In step 210, when the image receiving material 108 conveyed by the conveyance roller 114 is detected, step 212
At this point, the cam 204 rotates to release the pressure on the arm 202, and the cleaning blade 200 separates from the heating drum 116.

Furthermore, here, the image receiving material 108 is conveyed to the thermal development transfer section 104 in synchronization with the conveyance of the photosensitive material 16,
The photosensitive material 16 has a predetermined length (20 mm in this example).
) In the advanced state, it is sent between the bonding roller 120 and the heating drum 116 and overlapped.

In this case, the bonding roller 120 and the water application section 62
A guide plate 70 is disposed between the squeeze roller 68 and the squeeze roller 68, and the photosensitive material 16 sent from the squeeze roller 68 is reliably guided to the bonding roller 120.

Further, a blade guide 124 is arranged between the bonding roller 120 and the conveying roller 114 for the image receiving material 108, so that the image receiving material 108 is also securely transferred to the bonding roller 114.
You will be guided to 20. Further, since back tension is applied to the photosensitive material 16 and the image receiving material 108 that are fed to the bonding roller 120, the photosensitive material 16 and the image receiving material 108 are fed without wrinkles.

Furthermore, in this case, since the image-receiving material 108 is smaller in width and length than the photosensitive material 16, the peripheral portion of the photosensitive material 160 is overlaid with all four sides protruding from the peripheral portion of the image-receiving material 1080. be done.

The photosensitive material 16 and the image-receiving material 108 which have been superimposed by the bonding roller 120 are passed around approximately 1/2 of the circumference of the heating drum 116 (around the wrapping roller 134
and the winding roller 140). When the photosensitive material 16 is heated during this nip conveyance, it releases a mobile dye, and at the same time, this dye is transferred to the image receiving material 1.
An image is obtained by transferring to the 080 dye fixing layer.

In this case, the photosensitive material 16 and the image-receiving material 108 are reliably overlapped, and the periphery of the photosensitive material 16 protrudes from the periphery of the image-receiving material 108 on all four sides and is in close contact with the outer periphery of the heating drum 116. A predetermined amount of pressure can be applied to each material without shifting, and high-quality images can be obtained.

Furthermore, since the endless pressure welding bell (118) is directly and forcibly rotated by a winding roller 140 connected to a motor, the winding portion has a large bending ratio and can be reliably bent even when bent at multiple locations. Rotates at a predetermined speed. Furthermore, since the heating drum 116 has low resistance to rotational driving force and is in pressure contact with the endless pressure belt 118 over a wide range, the rotational force from the endless pressure belt 118 is reliably transmitted by friction. some of which is transmitted without being lost).

Furthermore, while the photosensitive material 16 and the image-receiving material 108 are being conveyed while being sandwiched (that is, during the heat transfer process),
The cam 204 is in a state where the pressure of the arm 202 is released, and the cleaning blade 200 is separated from the heating drum 116. Therefore, the cleaning blade 20
0 does not become the rotational resistance of the heating drum 116.

Therefore, there is no difference in rotational speed between the endless pressure belt 118 and the heating drum 116. Therefore, shearing force is not generated between the photosensitive material 16 and the image-receiving material 108, which are sandwiched and conveyed by the endless pressure belt 118 and the heating drum 116, and the two materials do not shift, thereby preventing image unevenness (transfer misalignment) from occurring. A good image can be obtained without any problems.

Furthermore, since the endless pressure contact belt 118 is electrically conductive, generation of static electricity due to friction between the heating drum 116 and the endless pressure contact belt 118 or the photosensitive material 16 or the image receiving material 108 is prevented, and an image obtained on the image receiving material 108 is prevented. There is also no fogging.

Thereafter, when the photosensitive material 16 and the image-receiving material 108 are sandwiched and conveyed and reach the lower part of the heating drum 116, the image-receiving material 108
A peeling claw 154 engages with the leading end of the photosensitive material 16 that is conveyed a predetermined length ahead of the photosensitive material 16 , and peels the leading end of the photosensitive material 16 from the outer periphery of the heating drum 116 . Further, the peeled photosensitive material 16 is wrapped around a bending guide roller 142 and bent downward, cut into pieces by a cutter 180, and accumulated in a waste photosensitive material storage box 178.

On the other hand, the image-receiving material 108, which is separated from the photosensitive material 16 and moves while remaining in close contact with the heating drum 116, is dried by the drying fan 182 while being separated from the heating drum 116 and its outer periphery by a peeling claw. 176 and then sent to a peeling roller 174. Further, here, the tray 184 is peeled off from the outer periphery of the heating drum 116 by the peeling roller 174 and the peeling claw 176.
accumulated on top.

In this case, when the image-receiving material 108 after peeling is detected by the image-receiving material sensor 177 in step 214 in FIG. is in contact with each other. Therefore, dirt (chemical liquid such as gelatin and dust contained in the photosensitive material 16) on the outer peripheral surface of the heating drum 116 is forcibly removed.

As described above, in this embodiment, the cleaning blade 200 is brought into contact with the outer peripheral surface of the heating drum 116 only when the photosensitive material 16 and the image receiving material 108 are not being conveyed while being held between the heating drum 116 and the endless pressure contact bell 118. Since the heating drum 116 is configured to be in contact with each other, even when performing image recording processing continuously, the heating drum 116 that is rotated passively
and the endless pressure welding belt 118 (
Dirt adhering to the outer periphery of the heating drum 116 can be removed without causing transfer misalignment of the image. Therefore, the image surface of the image-receiving material 108 is not stained, and the photosensitive material 16 and the image-receiving material 108 are not unnecessarily stuck to the heating drum 116 (they can be easily peeled off from the heating drum 116).

In the above embodiment, the photosensitive material 16 and the image receiving material 108 are used as image recording materials, and the photosensitive material 16 is conveyed so as to be positioned outside the image receiving material 108. However, the present invention is not limited to this. The present invention is applicable even when the photosensitive material 16 is positioned inside and transported, and is also applicable not only to these materials but also to other sheet-like image recording materials.

[Effects of the Invention] As explained above, the image recording apparatus according to the present invention can eliminate image unevenness (transfer deviation) caused by the difference in rotational speed between the drum and the endless pressure belt that presses against a part of the outer periphery of the drum. This has the effect of removing dirt adhering to the outer periphery of the drum.

[Brief explanation of drawings]

FIG. 1 is an enlarged side view of main parts of an image recording apparatus showing the correspondence among a heating drum, an endless pressure belt, and a cleaning blade according to an embodiment of the present invention, and FIG. 2 is a schematic overall configuration of an image recording apparatus according to an embodiment. 3 are flowcharts showing the operation of the cam. 1O... Image recording device, 16... Photosensitive material, 104... Thermal development transfer section, 108... Image receiving material, 116... Heating drum, 118... Endless pressure belt, 120... Bonding roller, 134.136.138.140...Wrap roller, 200...Cleaning blade, 202...Arm, 204...Cam.

Claims (1)

[Claims] (1) An endless press-contact belt that is wrapped around a plurality of wrapping rollers and rotated by the rotational driving force of a drive source applied to one of the plurality of wrap-around rollers, and a portion of the outer periphery of the endless press-contact belt a drum that is in pressure contact with a part of the outer periphery of the drum, and is rotated as a result of the rotational force of the endless pressure belt being transmitted by the frictional force between the endless pressure belt, and two different image recording materials are attached to the drum. An image recording device that performs image recording processing by being tightly wrapped around the outer periphery of the drum as it rotates and conveyed while being held between the endless pressure contact belt, the drum being arranged so as to be able to come into contact with and be separated from the outer periphery of the drum; a cleaning member that cleans the outer periphery of the drum while in contact with the outer periphery of the drum; and a cleaning member that moves the cleaning member to clean the outer periphery of the drum only when the image recording material is not being conveyed between the drum and the endless pressure belt. An image recording device comprising: a moving means for bringing the device into contact with the image recording device;