JPH03110561A - Image recorder - Google Patents

Abstract

PURPOSE:To carry image recording materials while they adhere to each other and while they are held between the endless press-welded belt and the heating drum and to form a picture free of irregularity by applying the rotating/driving force of a driving source to one of plural winding rollers, rotating the endless press-welded belt, transmitting its rotation to the drum by means of the frictional force of the belt against the drum, and thereby causing the drum to follow the rotation. CONSTITUTION:When the winding roller 140 rotates by means of a motor 194, the endless press-welded belt 118 wound around the winding roller 140 rotates; as the endless press-welded belt 118 rotates, its rotation is transmitted to the heating drum 116 by the friction of the endless press-welded belt 118 against the heating drum 116, and consequently the heating drum 116 follows the rotation. That is, the endless press-welded belt 118 is rotated by the winding roller to which the rotating/driving force of the driving source is applied, this rotation is transmitted by the friction of the belt against the drum, and the drum 116 is caused to follow the rotation. Since shearing force is prevented from being caused between the photosensitive material and the image receiving material, both of which are carried while they are held between the endless press-welded belt and the heating drum, slip does not occur between both the materials. Thus, a satisfactory picture free of the occurrence of picture irregularity can be obtained.

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 part of the outer periphery of an endless pressure belt wound around a plurality of rollers is pressed onto the outer periphery of the heating drum.

The heating drum is connected to a drive source such as a morph to rotate, and the rotation of the heating drum is transmitted by the frictional force between it and the endless pressure belt, causing the endless pressure belt to rotate along with the heating drum. It is supposed to be done.

The exposed photosensitive material is coated with water as an image-forming solvent and then superimposed on the image-receiving material, and in this state is tightly wound around the outer periphery of the heating drum. Furthermore, both materials are conveyed while being held between a heating drum and an endless pressure belt, so that the photosensitive material is thermally developed and the image is transferred to the image-receiving material.

[Problems to be Solved by the Invention] By the way, in the endless pressure belt that is pressed against the outer periphery of the heating drum, since a plurality of windings having a relatively small diameter are wound around rollers (i.e., the windings of the endless pressure belt are has a large curvature ratio and is bent at multiple points),
Large resistance to rotational driving force. As a result, the rotational force due to friction between the heating drum and the heating drum is not sufficiently transmitted (part 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. There was a case.

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). There was a problem.

In this case, it is possible to connect both the heating drum and the endless pressure welding belt to a drive source and rotate them, but if a single drive source is connected to each part by gears, chains, etc., the dimensions of the connected parts Due to errors, it is extremely difficult to accurately match the rotational speeds of the heating drum and the endless pressure belt, and when different drive sources are directly connected to each part, it is difficult to make the rotational speeds of each drive source (motor) the same. In this case as well, it is extremely difficult to accurately match the rotational speeds of the heating drum and the endless pressure belt.

In consideration of the above facts, the present invention equalizes the rotational speed of the drum and the endless pressure belt that presses against a part of the outer periphery of the drum. It is an object of the present invention to provide an image recording apparatus that can form an image without unevenness (transfer misalignment) by nipping and conveying a recording material while keeping it in close contact with the recording material.

[Means for Solving the Problems] An image recording apparatus according to the present invention includes a drum that rotates by the driving force of a drive source, a plurality of windings that are wound around a roller, and a part of the outer periphery of which is aligned with the outer periphery of the drum. and an endless press-contact belt that presses against the drum, and as the drum rotates, two different image recording materials are closely wrapped around the outer periphery of the drum and conveyed while being sandwiched between the drum and the endless press-contact belt to perform image recording processing. In the image recording apparatus, the rotational driving force of the drive source is applied to one of the plurality of rollers to rotate the endless pressure belt, and the rotation of the endless pressure belt is caused to rotate between the rotation of the endless pressure belt and the drum. It is characterized by transmitting the frictional force between the drums and rotating the drums.

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

Since the endless pressure welding belt is directly and forcibly rotated, the winding portion thereof has a large curvature ratio, and even if it is bent at a plurality of points, it will surely rotate at a predetermined speed.

Furthermore, since the drum has low resistance to the rotational driving force, the rotational force from the endless pressure welding belt due to friction is sufficiently transmitted (without a part of the rotational force being lost), and therefore, the endless pressure welding belt and the heating There is no difference in rotational speed between the drum and the 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, resulting in no uneven images (transfer misalignment). You can get a good image.

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

A photosensitive material magazine 14 is arranged in the image recording apparatus 100 machine 12, and a photosensitive material 16 is wound up into a roll and stored therein.

The photosensitive material magazine 14 can be pulled out to the front side of the machine stand 12 (toward the front side of the paper in the second drawing, that is, in the width direction of the wound photosensitive material!F16), and is pulled out when replacing the magazine, etc. . Further, a light shielding member (not shown) is placed in the drawer portion of the photosensitive material magazine 14, and the photosensitive material magazine 1
4 is housed in the machine base 12, external light does not enter the machine base 12, and the housed photosensitive material 16 is prevented from being inadvertently exposed.

The photosensitive material 16 has a photosensitive silver halide, a binder, a dye-donating substance, and a reducing agent on a support,
It is wound up with its photosensitive (N-light) side facing downwards of the device.

A nip roller 18 and a guillotine-type cutter 20 are arranged near the photosensitive material outlet of the photosensitive material magazine 14, and cut the photosensitive material 16 after pulling it out to a predetermined length from the photosensitive material magazine 14. Also,
After the cutter 20 is operated, the nip roller 18 reverses,
The nip roller 18 rewinds the photosensitive material 16 to such an extent that the leading end thereof is slightly nipped.

On the other hand, the photosensitive material 16 cut into a predetermined length is transported to the exposure section 2.
2.

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). While being moved), it passes between both conveyance rollers (M tip).

The guide plate 28 and the exposure glass 30 are removable, so that if the transported photosensitive material 16 becomes clogged (so-called jam), it can be easily cleared.

On the side of the exposure section 22 (the side opposite to the photosensitive material magazine 14),
A branch section 32 and an inversion section 34 are arranged.

A flapper 36 is rotatably arranged at the branching portion 32 . This flapper 36 is configured to enter into and block the transport path of the photosensitive material 16 which is branched into two, which is located on the lower side of the apparatus.
As a result, the photosensitive material 16 after passing through the exposure section 22 is guided to a conveyance path located above the flapper 36 of the apparatus.

The guided photosensitive material 16 is turned over at the reversing section 34 and then reaches the branching section 32 (flat head dimension -36) again. In this case, the flapper 36
is removed from the conveyance path of the photosensitive material 16, and the photosensitive material 16 after being reversed is conveyed again to the exposure section 22 (between the conveyance rollers 24 and 26).

Here, the conveying speed of the photosensitive material 16 by the conveying rollers 24 and 26 (the passing speed of the N tip portion) is 100 mm/sec.

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.

The light source 40 is a cylindrical halogen lamp (power supply voltage 80V).
, 380W), and in this embodiment, the illuminance on the document surface is approximately 5X1.0'Lx. Further, the light intensity distribution of this light source 40 (halogen lamp) is set to be slightly smaller at both ends in the axial direction than at the center. This is to make the density distribution of the image uniform in accordance with the temperature distribution of the thermal development transfer section 104, which will be described later.

The lens unit 48 is constituted by a group of a plurality of lenses (for example, six lenses), and further includes a color adjustment filter (CC filter) not shown. Further, the front side of the lens unit 48 (moving mirror 42A,
42B side) at a predetermined interval (in this example, 10
A diaphragm slit plate 52 is arranged at a distance of 0 mm).

The light source 40, movable mirrors 42A, 42B, and lens unit 48 are movable along the document placement plate 50, and the document 54- placed on the document placement plate 50 is movable.
- Light is irradiated 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. In this case, the moving speed of the moving mirror 42B is the same as that of the light source 40 and the moving mirror 42B.
The moving speed of A is 1/2.

The reflecting mirror 46 is arranged so as to be able to enter or leave the optical path of the image light that is irradiated onto the exposure section 22 via the moving mirrors 42A, 42B and the fixed mirror 44 described above. That is, normally, the light that enters the optical path of the image light and is irradiated via the movable mirror 42A 142B or the fixed mirror 44 is reflected in a substantially perpendicular direction. When scanning and exposing the photosensitive material 16 located in the exposure section 22, the light beam is removed from the optical path so that an image can be exposed.

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 photodetection sensor 56 includes a total of six photosensitive heads capable of detecting two types of wavelengths, blue, green, and red, and is further connected to a control device (not shown). This light detection sensor 56 measures the image density of the image on the original 54, and based on this measurement value, the exposure conditions of the aforementioned color adjustment filter (CC filter) and the aperture slit plate 52 are set. .

The exposure section 22 having such a structure is constructed as one unit as a whole and is attached to the machine base 12 so as to be openable by a hinge (not shown) (so-called taram shell type), so that the internal This makes it easy to perform inspections and so-called jam handling when paper jams occur.

A cooling fan 58 is arranged on the side of the exposure section 22 (on the side opposite to the sensor 56 in light detection), 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 part 60 is arranged below the flapper 37.

The flapper 37 removes the photosensitive material 16 after passing through the exposure section 22.
is guided to the reversing section 60.

A water application section 62 is arranged below the reversing section 34 on the side of the reversing section 60 (on the side opposite to the photosensitive material magazine 14). exposure! The photosensitive material 16 on which the image has been exposed at step 22 is conveyed to the reversing section 60 by switching the flapper 37 upward, and after being reversed at the reversing section 60, the photosensitive material 16 is transferred to the conveying roller 29.
．． 31, 33, and 35 into the water application section 62.

As shown in detail in FIG. 3, a coating tank 64 is arranged in the water coating section 62. Further, a pair of supply rollers 66 are provided at the upstream end of the coating tank 64 in the direction in which the photosensitive material 16 is conveyed.
Further, a pair of squeeze rollers 68 are arranged at the downstream end of the photosensitive material 16 in the conveying direction.

In this embodiment, both the supply roller 66 and the squeeze roller 68 are made of silicone rubber rollers with an outer diameter of 20 mm, and the hardness of the rubber is 6.
0 and 5, and the squeeze roller 68 is set to 55±5. Further, a pressing force of 1 kg is applied to each roller at both ends in the longitudinal direction.

On the other hand, a guide plate 70 is attached above the coating tank 64 so as to face the coating tank 64, and the space between the guide plate 70 and the coating tank 64 is a passage for the photosensitive material 16. . The guide plate 70 is pivotally supported by a hinge 72, and allows the passage of the photosensitive material 16 to be opened and closed.
It also makes it easier to handle paper jams and clean the tank.

Further, a sensitive material sensor 74 is arranged near the supply roller 66 on the upstream side in the conveying direction of the photosensitive material 16, and the reversing section 60
It is possible to detect the photosensitive material 16 conveyed from. Therefore, when the sensitive material sensor 74 detects the photosensitive material 16 conveyed from the reversing section 60, the supply roller 66 and the squeeze roller 68 are driven, and thereby the photosensitive material 16 is transferred between the guide plate 70 and the coating tank 64. The paper is fed into the space between the paper sheets, and is further pinched and conveyed by squeeze rollers 68.

Note that here, the supply roller 66 and the squeeze roller 68
The transport speed of the photosensitive material 16 (the speed of passage between the guide plate 70 and the coating tank 64) is 2Q mm/sec. That is, in the exposure section 22, the photosensitive material 16
is transported at 100 mm/secC, but the sensitive material sensor 74
When detecting the photosensitive material 16, the conveying speed of the conveying rollers 29, 31, 33, 35 is also increased to 20 mm by clutch operation.
The water is decelerated to /sec and sent to the water application section 62.

As shown in FIGS. 4(A) and 4(B), a plurality of rows of ribs 76 are provided on the surfaces of the coating tank 64 and the guide plate 70 through which the photosensitive material 16 passes, and are inclined with respect to the conveyance direction of the photosensitive material 16. This reduces the frictional resistance when the photosensitive material 16 passes between the guide plate 70 and the coating tank 64, and prevents the photosensitive material 16 from being scratched at certain positions. .

In this coating tank 64, a supply vibrator 78 is provided which extends approximately at the center of the passage of the photosensitive material 16 and below the squeeze roller 68.
The bifurcated tip portions 78A and 78B are connected to each other. A pump 80 and a filter 82 are arranged in the middle of the supply pipe 78, and the other end of the supply pipe 78 is supported by an open lid 84 and located in a replenishment tank 86.

Further, the replenishment tank 86 is filled with water as an image forming solvent and also contains an antifoaming agent. Therefore, by driving the pump 80, the replenishment tank 86
The coating tank 64 can be filled (replenished) with the water inside.

Therefore, when the coating tank 64 is filled with water, the water is applied to the photosensitive material 16 fed between the guide plate 70 and the coating tank 64 by the supply roller 66, and is further held between the squeeze rollers 68. Excess water is removed by being transported.

In this case, the water application length of the photosensitive material 16 between the guide plate 70 and the coating tank 64 (the length of the photosensitive material 16 passing through water) is 70 mm, and the water immersion time is 3. It is 5 seconds. Furthermore, the photosensitive material 16 after the water coating process (that is, after passing through the squeeze roller 68) has a density of 15±Igr/m2 (maximum 17gr/m2).
m' or less water is applied.

An open lid 84 supporting the supply pipe 78 is attached to the machine base 12 by a hinge 88, so that the inside of the replenishment tank 8G can be opened. Further, the tip of the supply pipe 78 located inside the replenishment tank 8G is formed to have a narrow diameter to prevent liquid from leaking when the open lid 84 is opened.

A water tank section 90 is arranged above the replenishment tank 86, and a filter 92 is further arranged in the water tank section 90. This water tank section 90 includes an overflow vibe 9 whose one end is connected to the application tank 64 on the side of the squeeze roller 68.
The other ends of 4 are connected. For this reason, the application tank 64
When the amount of water (replenishment) exceeds the specified amount,
This water can be automatically returned to the replenishment tank 86 (water tank section 90) via an overflow vibe 94.

Furthermore, one end of a discharge vibrator 96 is connected to the intermediate portion of the supply vibrator 78 (between the coating tank 64 and the pump 80), and the other end of the discharge vibrator 96 is connected to the water tank portion 90. A solenoid valve 98 is arranged in the section. This solenoid valve 98 is normally in a closed state, but
By opening the tank 86 (water tank section 90), water in the coating tank 64 is refilled through the discharge pipe 96.
It is now possible to discharge to.

A bypass vibe 100 is attached to the water tank 90 to prevent water from overflowing from the water tank 90 when the filter 92 becomes clogged.

A heater 102 is attached to the outer periphery of the bottom of the coating tank 64, and the water filled in the coating tank 64 is
The temperature is raised to 2°C. For this reason, the amount of water permeating (infiltrating) the emulsion surface of the photosensitive material 16 passing through the coating tank 64 increases, making it easier to reach saturation.

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

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

The receiving material magazine 106 can also be pulled out toward the front side of the machine stand 12 (toward the front side of the paper in the second drawing, that is, in the width direction of the wound image receiving material 108).

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.

Near the receiving material outlet of this receiving material magazine 106,
Nip roller 110 and guillotine type cutter 1
12 is arranged to cut the image receiving material 108 drawn out from the receiving material magazine 106 into a length shorter than the photosensitive material 16. Further, after the cutter 112 is operated, the nip of the nip roller 110 is released, so that the front end of the image receiving material 108 is not nipped by the nip roller 110 for a long time and the surface (image forming surface) is not deformed.

The image receiving material 108 cut into a predetermined length is conveyed to the thermal development transfer section 104 by a plurality of conveyance rollers 114.

The thermal development transfer section 104 is composed of a heating drum 116 and an endless pressure belt 118, and furthermore, a bonding roller 120 as a winding means is arranged on the outer periphery of the heating drum 116 on the water application section 62 side.

A guide plate 122 is disposed above the conveyance path of the photosensitive material 16 between the bonding roller 120 and the squeeze roller 68 of the water application section 62.
The photosensitive material 16 sent from the photosensitive material 16 is guided to the bonding roller 120 in correspondence with the back side (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, a blade guide 124 is disposed between the bonding roller 120 and the conveyance roller 114 for the image-receiving material 108, and the image-receiving material 108 is conveyed from the conveyance roller 114.
8, it is guided 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 sliding of the image receiving material 108 and prevent it from being scratched.

Here, the squeeze roller 120 is moved so that the relative angle between the photosensitive material 16 and the image receiving material 108 fed to the bonding roller 120 is 30 degrees or more (preferably 45 degrees or more).
8, the conveyance roller 114, and other parts are set.

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.
Pack 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 squeeze roller 68 and the conveyance roller 114 to maintain a predetermined tension.

The bonding roller 120 has an outer diameter of 2 at the center in the axial direction.
A 9mm so-called crown roller with a wall thickness of 3mm on the outer circumferential surface.
It is coated with silicone rubber, and the hardness of the rubber is approximately 80. Further, this bonding roller 120 is pressed against the outer periphery of the heating drum 116 by applying a pressing force of 15 kg to each end portion in the longitudinal direction.

As shown in FIG. 5, a felt wiping cloth 121 is placed above the bonding roller 120. The wiping cloth 121 is wrapped and fixed around the mounting plate 123 and is always in contact with the surface of the bonding roller 120.

Therefore, as the bonding roller 120 rotates, water adhering to the surface of the bonding roller 120 can be removed.

The heating drum 116 is made of a thin-walled aluminum pipe, and in this embodiment has a wall thickness of 2 mm and an outer diameter of 1 mm.
56 mm, and an effective width in the axial direction of 350 mm. The surface of the heating drum 116 is coated with Teflon, and the inner peripheral surface is coated with heat-resistant black paint.

As shown in FIG. 5, on the outer periphery of the heating drum 116,
A plurality of substantially rectangular lateral grooves 126 whose longitudinal direction is the axial direction of the heating drum 116 are formed on the same line, so as to partially release the pressure contact between the outer periphery of the heating drum 116 and the bonding roller 120. ing. That is, as a result of the release of the pressure contact by the horizontal grooves 126, the water that remains in a bead shape between the bonding roller 120 and the heating drum 116 adheres to the surface of the heating drum 116 or the bonding roller 120 due to its surface tension. It is supposed to move.

Further, on the downstream side of the lateral groove 126 in the rotational direction of the heating drum, vertical grooves are formed as a plurality of substantially rectangular recesses whose longitudinal direction is the circumferential direction of the heating drum 116 (that is, in a direction orthogonal to the lateral groove 126). 128 are formed at equal intervals, and serve to peel off the photosensitive material 16 in correspondence with peeling claws 154, which will be described later.

In this embodiment, the vertical groove 128 has a widthwise dimension of 5 mm.
, the longitudinal dimension is 26 mm, and the depth dimension is Q, 2
It is formed in mm.

The photosensitive material 16 to be conveyed to the thermal development transfer section 104 is fed between the bonding roller 120 and the heating drum 116 so that its leading edge is located at the center in the longitudinal direction of the vertical groove 128. 108 is synchronized with the conveyance of the photosensitive material 16, and the bonding roller 12 is moved while the photosensitive material 16 is ahead for a predetermined length (20rnrn in this embodiment).
0 and the heating drum 116 so that they are overlapped. In this case, since the image-receiving material 108 is smaller in width and length than the photosensitive material 16, as shown in FIG. They are designed to be stacked one on top of the other while protruding from the periphery.

As shown in FIG. 5, a cam 1 is attached to the side wall of the heating drum 116.
30 is fixed. This cam 130 can be engaged with an actuating arm 146, which will be described later, and is capable of engaging with the heating drum 1.
The actuating arm 146 is rotated as the actuating arm 146 rotates.

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 belt 11 that presses against the outer periphery of the heating drum 116
Reference numeral 8 has a structure in which a woven cloth material is covered with rubber, and in this embodiment, the width direction dimension is formed to be 34 Qmm. 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. Also,
The covering rubber is silicone rubber containing carbon and 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 as shown in FIG. 1, a gear 192 is fixed to its rotating shaft 190. This gear 192 meshes with a gear 196 fixed to a motor 194 as a driving source. Therefore, the driving force of the motor 194 is directly transmitted through the gears 192 and 196, and the roller 140 is rotated.

When the roller 140 is rotated by the motor 194, the endless pressure welding belt 118 wound around the roller 140 is rotated, and the rotational force of the endless pressure belt 118 is accordingly heated. The frictional force between the heating drum 116 and the heating drum 116 is transmitted to the heating drum 116, so that the heating drum 116 is driven to rotate.

In this case, since the heating drum 116 has low resistance to the 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 frictional force (rotation Therefore, there is no difference in rotational speed between the endless pressure belt 118 and the heating drum 116.

Furthermore, 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 placed between the heating drum 116 and the endless pressure belt 118 while remaining in the superimposed state. roller 134
The winding material is sandwiched and conveyed between the rollers 140). When the photosensitive material 16 is heated during this clamping and withdrawal, 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.

In this case, since the endless pressure belt 118 is electrically conductive, generation of static electricity due to friction between the heating drum 116 and the endless pressure belt 118, the photosensitive material 16, or the image receiving material 108 is prevented.

As shown in FIGS. 8 and 9, a bending guide roller 142 is disposed below the heating drum 116 on the downstream side of the endless pressure belt 118 in the material supply direction.

The bending guide roller 142 has a shaft 144 connected to a driving source (not shown), and is rotated by the driving force. Further, the bending guide roller 142 is connected to the heating drum 1.
The heating drum 11 is in pressure contact with the outer periphery of the heating drum 16.
The photosensitive material 16 or the image-receiving material 108 conveyed by the endless pressing belt 118 is further pinched and conveyed.

An operating arm 146 is fixed to a shaft 148 at the lower part of the heating drum 116 on the downstream side of the bending guide roller 142 in the material supply direction, and this shaft 148 is further rotatably supported.

As shown in detail in FIG. 7, an engagement roller 150 is rotatably attached to the tip of the actuation arm 146.
It can engage with a cam 130 fixed to the side wall of the heating drum 116. The shaft 148 also has a torsion spring 1.
52 are connected to each other, so that the shaft 148, ie, the actuating arm 146, is always biased in the direction in which the engagement roller 150 approaches the bending guide roller 142 (in the direction of the arrow in FIG. 7).

In other words, when the heating drum 116 rotates and the cam 130 reaches a predetermined position, the engagement roller 150 comes into contact with the cam 130 and presses the operating arm 146, so that the heating drum 1
As the heating drum 1160 rotates, the engaging roller 150 rotates in the direction of arrow B in FIG. It moves and returns to its original position.

A peeling claw 154 is rotatably supported by a shaft 156 between the shaft 148 of the operating arm 146 and the heating drum 116 (at the lower part of the heating drum 116 on the downstream side of the bending guide roller 142 in the material supply direction).

A peeling part 158 having a wedge-shaped cross section is formed at the upper end of the peeling claw 154 (on the opposite side from the shaft 156), and a concave guide part 160 that curves gently downward is formed from the peeling part 158. ing.

The peeling portion 158 corresponds to the vertical groove 128 formed on the outer periphery of the heating drum 116, and can be inserted into or removed from the vertical groove 128V. In this embodiment, the peeling claw 154 (peeling portion 158) (7: thickness dimension (claw width dimension) is formed to be 3 mm, while a tension spring is provided at the downstream end of the peeling claw 154. 162 are connected to each other.For this reason, the peeling claw 154 has a peeling portion 158 that is connected to the vertical groove 128.
It is constantly biased in the direction of inward movement (in the direction of arrow C in Fig. 7). In this case, the biasing force of the tension spring 162 is equal to the torsion spring 1 that biases the actuating arm 14G.
A guide hole 164 is formed in the center of the peeling claw 154, which is weaker than the biasing force of the peeling claw 52, into which a bottle 166 is movably fitted.

The bin 166 is connected to the shaft 1 that pivotally supports the aforementioned operating arm 146.
48 by an arm 168,
It is adapted to move around an axis 148 as the actuation arm 146 rotates.

This bin 166 is normally moved by the peeling claw 1 by the biasing force of a torsion spring 152 connected to the operating arm 146.
54 is located at the end of the front side of the guide hole 164 (on the peeling part 158 side), thereby holding the peeling claw 154 and keeping the peeling part 158 separated from the outer periphery of the heating drum 116. When the actuating arm 146 is pressed by the cam 130 and rotates in the direction of arrow B in FIG. 7 against the urging force of the torsion spring 152, the rear end of the guide hole 164 (in the direction of the axis 148) As a result, the holding of the peeling claw 154 is gradually released, and the peeling claw 154 is pulled to the peeling portion 158 by the biasing force of the tension spring 162.
is moved in the direction of entering the vertical groove 128 on the outer periphery of the heating drum 116 (in the direction of arrow C in FIG. 7).

In this case, the cam 130 is rotated so that when the heating drum 116 rotates to a predetermined position and the vertical groove 128 reaches the peeling position, the peeling claw 154 rotates and the peeling part 158 fits into the vertical groove 128. The dimensions of each part such as the fixed position, the actuating arm 146, and the guide hole 164 are set.

When the peeling portion 158 is fitted into the vertical groove 128, the peeling claw 154 is attached to the endless pressure belt 118 and the heating drum 116.
The photosensitive material 16 and the image receiving material 108 are sandwiched and conveyed between
Of these, only the leading end of the photosensitive material 16 stacked one above the other by a predetermined length is engaged, and this leading end is peeled off from the outer periphery of the heating drum 116. Further, the peeled photosensitive material 16 is guided by a guide section 160.

In this case, when the peeling part 158 of the peeling claw 154 is fitted into the vertical groove 128, the peeling part 158 is located inside the outer peripheral surface of the heating drum, that is, inside the contact surface between the photosensitive material 16 and the heating drum 116. The photosensitive material 16 does not enter between the peeling section 158 and the heating drum 116, and the photosensitive material 16 can be reliably peeled off from the outer periphery of the heating drum 116.

A moving roller 170 is arranged near the peeling claw 154 side. The moving roller 170 is connected to the shaft 148 via a leaf spring 172, and is rotatable together with the shaft 148, that is, the operating arm 146.

The moving roller 170 normally comes into contact with the bending guide roller 142 and presses it slightly due to the biasing force of the leaf spring 172, but as the actuating arm 146 rotates in the direction of arrow B in FIG. Bending guide roller 14゛2
It is designed to move in a direction away from. Therefore, in this case, the photosensitive material 16 is peeled off from the outer periphery of the heating drum 116 by the peeling portion 158 of the peeling claw 154, and is removed from the movement locus of the photosensitive material 16 guided by the guide portion 160, thereby allowing the photosensitive material 16 to move. On the other hand, when the operating arm 146 overcomes the cam 130 and rotates in the direction of arrow C in FIG. 7, it moves in a direction approaching the bending guide roller 142. Therefore, in this case, the photosensitive material 16 that is peeled from the outer periphery of the heating drum 116 by the peeling part 158 of the peeling claw 154 and guided by the guide part 160 is pressed by the moving roller 170 and guided in a bending manner, and is guided by the bending guide roller 142. It is designed to be wrapped around.

On the other hand, near the heating drum 116 above the peeling claw 154,
A peeling roller 174 and a peeling claw 176 are arranged to peel off the image receiving material 108, which is separated from the photosensitive material 16 and moves together with the heating drum 116, from the outer periphery of the heating drum 116.

The thermal development transfer section 104 configured as described above is constructed as one unit as a whole, and is directed in the direction opposite to the position of the water application section 62 with respect to the machine base 12 (the photosensitive material magazine 1
4 and the side opposite to the receiving material magazine 106). Therefore, even if the photosensitive material 16 or the image-receiving material 108 becomes clogged (so-called jam) during transportation, it can be easily repaired.

Further, the thermal development transfer section 104 is covered with a heat insulating material, and a thin aluminum plate is attached to the inner peripheral surface thereof. For this reason, the halogen lamp 132A,
This makes it easier to raise the temperature of the heating drum 116 by the heating drum 132B, and prevents heat transfer to other parts.

A waste photosensitive material storage box 178 is arranged below the thermal development transfer section 104 (separation claw 154), and a cutter 180 is arranged at the entrance of the waste photosensitive material storage box 178. The photosensitive material 16 peeled off from the outer periphery of the heating drum 116 and separated from the image receiving material 108 is transferred to the cutter 1.
The waste photosensitive material storage box 17 is cut into pieces by 80.
8.

Further, a drying fan 182 is arranged near the thermal development transfer section 104 (peeling roller 174), and
Air is blown onto the image receiving material 108 after it has been separated to dry it.

The image receiving material 108 peeled off from the outer periphery of the heating drum 116 by the peeling claw 176 is collected on a tray 184. In this case, the tray 184 is
The image receiving material 108 can be guided and accumulated in a direction perpendicular to the direction of conveyance by 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,
It reaches a branching part 32. Here, the flapper 36 enters and blocks the transport path of the bifurcated photosensitive material 16 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 you to the transport route where you are located.

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 branching section 32 (flapper 36) to the exposing 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
is 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, movable mirrors 42A, 42B, and lens unit 48 return to their home positions (image scanning start positions).

Here, the driving of the conveyance roller 24 and the conveyance roller 26 is started again, and the photosensitive material 16 covers the exposure area 22 by 100 mm.
It passes at a speed of /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, when the photosensitive material 16 conveyed from the reversing section 60 is detected by the sensitive material sensor 74, the conveyance of the conveyance rollers 29, 31, 33, 35 is decelerated, and the supply roller 66 and squeeze roller 68 are As a result, the photosensitive material 16 is moved between the guide plate 70 and the coating tank 64.
and is further conveyed by the squeeze roller 68. Here, the application tank 64 is filled with water in the replenishment tank 86 by driving the pump 80 (
Therefore, water is applied to the photosensitive material 16 fed between the guide plate 70 and the application tank 64 by the supply roller 66, and the water is applied while excess water is removed by the squeeze roller 68. 62.

In this case, the bottom of the coating tank 64 and the guide plate 7
A plurality of rows of ribs 76 are formed on the lower surface of the photosensitive material 16 at an angle with respect to the conveyance direction of the photosensitive material 16.
Frictional resistance when the photosensitive material 16 passes between the guide plate 70 and the coating tank 64 is reduced, and the photosensitive material 16 is prevented from being scratched at a certain position.

Furthermore, a heater 10 is provided on the bottom outer periphery of the coating tank 64.
2 is attached to raise the temperature of the water filled in the coating tank 64 to 35±2°C. amount) increases and definitely reaches the saturation amount.

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 a nip roller 110 and cut into a predetermined length by a cutter 112, and then transported by a transport roller 114 and sent to the thermal development transfer section 104. Also,
After cutting, the nip by the nip rollers 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.

In the thermal development transfer section 104 , the photosensitive material 16 and the image-receiving material 108 are fed between the outer periphery of the heating drum 116 and the bonding roller 120 .

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 photosensitive material 1 fed by the squeeze roller 68.
6 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 120.
You will be guided to. 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, here, the photosensitive material 16 conveyed to the thermal development transfer section 104 is placed between the bonding roller 120 and the heating drum 116 such that its leading end is located in the center of the vertical groove 128 formed in the heating drum 116. sent in between, and
The image-receiving material 108 is transferred to the bonding roller 120 and the heating drum 116 in synchronization with the conveyance of the photosensitive material 16, with the photosensitive material 16 leading by a predetermined length (20 mm in this embodiment).
It is sent between the two and overlapped. In this case, since the image-receiving material 108 is smaller in width direction and length direction than the photosensitive material 16, the sixth
As shown in the figure, the peripheral portions of the photosensitive material 16 are overlapped with each other with all four sides protruding from the peripheral portion of the image-receiving material 108.

Further, here, a horizontal groove 126 is formed on the outer periphery of the heating drum 116 so that the heating drum 116 and the bonding roller 120 can be connected to each other.
Since the pressure contact with the photosensitive material 16 and the image receiving material 108 is partially released, unnecessary adhesion of water to the photosensitive material 16 and the image receiving material 108 is prevented.

That is, for example, when image forming processing is performed continuously using the heating drum 116, water adhering to the back surface of the photosensitive material 16 is squeezed out by being overlapped by the bonding roller 120, and as shown in FIG. 10(A). As shown, it remains in a bead shape between the bonding roller 120 and the heating drum 116. Therefore, unnecessary water adheres to the image-receiving material 108 that has subsequently entered the image-receiving material 108, causing deformation and unevenness. However, by forming the lateral groove 126 on the outer periphery of the heating drum 116, when the lateral groove 126 faces the bonding roller 120, the heating drum 116 and the bonding roller 120 are in pressure contact as shown in FIG. 10(B). As a result, some of the water that had been staying in a bead shape moves to the heating drum 116 and the other part to the bonding roller 120 due to its surface tension. Therefore, as the heating drum 116 and the bonding roller 120 rotate, natural evaporation occurs and the wiping cloth 1
It is wiped off and removed by 21.

Therefore, unnecessary water retention is eliminated before the photosensitive material 16 and the image receiving material 108 enter, and unnecessary water does not adhere to the image receiving material 108 that subsequently enters, thereby preventing deformation and unevenness. .

The photosensitive material 16 and the image-receiving material 108 which have been superimposed by the bonding roller 120 are placed between the heating drum 116 and the endless pressure belt 118 while remaining in the superimposed state. roller 134
and the wound portion is conveyed while being held between the rollers 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.
The image is transferred to the dye fixing layer No. 08 to obtain an image.

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 belt 118 is connected to the motor 194 through the gears 192 and 196 and is directly and forcibly rotated by the roller 140, the winding has a large curvature at the part and has multiple parts. It will reliably rotate at the specified speed even if it is bent at a certain point. Furthermore, since the heating drum 116 has a small resistance to the 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 (the rotational force is (transferred without any loss). Therefore, there is no difference in rotational speed between the endless pressure belt 118 and the heating drum 116.

Therefore, the photosensitive material 16 and the image receiving material 108 are sandwiched and conveyed by the endless pressure belt 118 and the heating drum 116.
There is no shearing force generated between the two materials that causes the two materials to shift, and image unevenness (transfer misalignment) does not occur, making it possible to obtain a good image.

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

Here, while the photosensitive material 16 and the image-receiving material 108 are being sandwiched and conveyed (that is, during the heat transfer process), the bottle 166 that fits into the guide hole 164 of the peeling claw 154 is rotated by the screw connected to the shaft 148. It is located at the front end (separation part 158 side) of the guide hole 164 by the biasing force of the spring 152, thereby holding the peeling claw 154 and separating the peeling part 158 from the outer periphery of the heating drum 11G. (state shown in FIG. 8).

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
The peeling part 158 of the peeling claw 154 engages with the tip of the photosensitive material 16 that is conveyed a predetermined length ahead of the photosensitive material 1 .
6 is peeled off from the outer periphery of the heating drum 116.

That is, when the heating drum 116 rotates and the cam 130 reaches a predetermined position, the engagement roller 15 of the actuation arm 146
0 is pressed against the cam 130, and the heating drum 116
It rotates in the direction of arrow C in FIG. 7 along with the rotation of .

Along with this, the bottle 166 moves into the guide hole 16 of the peeling claw 154.
4 to the rear end (in the direction of the axis 148), the holding of the peeling claw 154 is gradually released, and the peeling claw 1
Reference numeral 54 indicates a direction (seventh
(in the direction of arrow C in the figure), and the peeling portion 158 enters into the vertical groove 128.

Further, as the operating arm 146 rotates, the moving roller 170 rotates and separates from the bending guide roller 142 (as shown in FIG. 9).

When the peeling part 158 of the peeling claw 154 fits into the vertical groove 128, the photosensitive material 16 and the image receiving material 108 that are sandwiched and conveyed between the endless pressure belt 118 and the heating drum 116 are removed.
It engages only the leading end of the photosensitive material 16 that is stacked a predetermined length ahead, and peels this leading end from the outer periphery of the heating drum 116. Furthermore, the peeled photosensitive material 16
is guided by the guide section 160.

In this case, when the peeling part 158 of the peeling claw 154 enters into the vertical groove 128, the peeling part 158 is located inside the outer peripheral surface of the heating drum, that is, between the photosensitive material 16 and the heating drum 118.
Since the photosensitive material 16 is located inside the contact surface of the heating drum 116, the photosensitive material 16 does not get between the peeling section 158 and the heating drum 116, and the photosensitive material 16 can be reliably peeled off from the outer periphery of the heating drum 116.

Further, in this case, the moving roller 170 is the bending guide roller 14
2, the peeling portion 158 of the peeling claw 154
The guide portion 1 is peeled off from the outer periphery of the heating drum 116 by
It is separated from the movement locus of the photosensitive material 16 guided by the guide 60, and does not prevent the movement of the photosensitive material 16.

When the heating drum 116 further rotates and the engagement roller 150 passes over the cam 130, the actuating arm 146 rotates in the direction of arrow C in FIG. 7 due to the biasing force of the torsion spring 152 and returns to its original position.

Therefore, the bottle 166 moves to the front end (separation part 158 side) of the guide hole 164 of the peeling claw 154 against the biasing force of the tension spring 162, and as a result, the peeling claw 1
54 in the direction of the arrow in FIG. 7 to separate the peeling portion 158 from the vertical groove 128 and keep it spaced apart from the outer periphery of the heating drum 116.

Furthermore, at the same time, as the actuating arm 146 rotates, the moving roller 170 moves in a direction approaching the bending guide roller 142. Therefore, the peeling portion 1 of the peeling claw 154
The photosensitive material 16 peeled off from the outer periphery of the heating drum 116 by 58 and guided by the guide section 160 is pressed by the moving roller 170 and guided in a bending manner, and wound around the bending guide roller 142 .

The photosensitive material 16 that is bent downward by the moving roller 170 and wound around the bending guide roller 142 is nipped and conveyed downward by the bending guide roller 142 and the moving roller 170.

Further, this photosensitive material 16 is 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, moves through between the heating drum 116 and the peeling claw 176 which is spaced apart from the outer periphery of the heating drum 116. , and sent to a peeling roller 174.

Further, here, the tray 1 is peeled off from the outer periphery of the heating drum 116 by the peeling roller 174 and the peeling claw 176.
84.

In this way, in this embodiment, the endless pressure belt 118
However, the winding to which the rotational driving force of the motor 194 is applied is directly rotated by the roller 140, and furthermore, the rotational force of this endless pressure belt 1180 is transmitted by the frictional force between it and the heating drum 116, so that the heating drum 116 is driven. Since the endless pressure belt 118 and the heating drum 116 are configured to be rotated at the same time, 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.

Next, another embodiment of the present invention will be described. Note that parts that are basically the same as those in the previous embodiment are given the same reference numerals and their explanations are omitted.

As shown in FIG. 11, the rotating shaft 200 of the heating drum 116
A gear 204 is attached via a one-way clutch 202 as a sliding means. Also, this gear 2
04 meshes with a gear 196 fixed to a motor 194 as a drive source via an intermediate gear 206.

As shown in FIG. 12, a plurality of balls 203 are incorporated in the one-way clutch 202.
The driving force is transmitted by the meshing of the parts 3 and 3.

Therefore, the driving force of the motor 194 is transmitted to the gear 204 via the gear 196 and the intermediate gear 206, and when the one-way clutch 202 is in the "contact" state (that is, the heating drum 116 rotation axis 2
00 is slower than the rotation speed of the gear 204 and the balls 203 are engaged), the motor 194
The driving force is transmitted to the rotating shaft 200 and the heating drum 116
A rotational force is applied to the

Further, a gear 192 is connected to the gear 204 via a plurality of intermediate gears 208 , and the gear 192 is fixed to the rotating shaft 190 of the roller 140 . Therefore, the intermediate gear 20
The driving force of the motor 194 is directly transmitted through the roller 8 and the gear 192, so that the roller 140 is rotated.

Therefore, in this embodiment as well, the winding is done by the roller 140.
When rotated by the motor 194, the endless pressure belt 118 wound around the roller 140 is rotated, and the rotational force of the endless pressure belt 118 increases the friction between the endless pressure belt 118 and the heating drum 116. The force is transmitted to the heating drum 116 so that the heating drum 116 is driven to rotate.

Furthermore, the shaft 210 of the bonding roller 120 that is pressed against the outer periphery of the heating drum 116 is similarly connected to the gear 204 via a one-way clutch 212 and a gear 214. Therefore, as the heating drum 116 rotates, the bonding roller 120 is driven to rotate, and when the one-way clutch 212 is in the "contact" state (
That is, only when the rotational speed of the shaft 210 of the bonding roller 120 becomes slower than the rotational speed of the gear 214), the driving force of the motor 194 is transmitted to the shaft 210 and rotational force is applied to the bonding roller 120. It is supposed to be done.

In this way, also in this embodiment, the endless pressure welding belt 11
8 is transmitted to the heating drum 116 by the frictional force between it and the heating drum 116, and the heating drum 116 is passively rotated. never occurs.

Furthermore, in this case, a one-way clutch 202 is disposed between the rotating shaft 200 of the heating drum 116 and the gear 204, so that the rotational resistance of the heating drum 116 becomes extremely small. becomes slower than the rotational speed of gear 204,
This one-way clutch 202 is in the "contact" state, and the driving force of the motor 194 is transmitted to the rotating shaft 200, and rotational force is applied to the heating drum 116, which is even more effective.

Further, since there is no difference in rotational speed between the bonding roller 120 and the heating drum 116, the photosensitive material 16 and the image receiving material 1 are separated by the bonding roller 120.
Even when overlapping with 08, the two materials do not shift.

Therefore, in this embodiment as well, the endless pressure welding belt 11
A shearing force is generated between the photosensitive material 16 and the image-receiving material 108, which are sandwiched and conveyed by the photosensitive material 16 and the heating drum 116, so that the two materials do not shift, and image unevenness (transfer misalignment) does not occur, resulting in a good image. is obtained.

In each of the above embodiments, 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, but 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 equalizes the rotational speed of the drum and the endless pressure belt that presses against a part of the outer circumference of the drum, thereby making the outer circumference -1 of the drum equal.
It has the effect of being able to nip and convey the wound image recording material such as a photosensitive material or image-receiving material while being in close contact with each other to form an image without unevenness (transfer misalignment).

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a winding roller and peripheral parts thereof according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of an image recording apparatus according to an embodiment of the present invention, and FIG. 4(A) is a back view of the guide plate according to the embodiment of the present invention, FIG. 4(B) is a cross-sectional view of the guide plate, and FIG. FIG. 6 is a perspective view showing a heating drum according to an embodiment of the invention, FIG. 6 is a plan view showing a superimposed state of a photosensitive material and an image receiving material, FIG. 7 is a perspective view showing a peeling claw and peripheral parts thereof, FIGS. FIG. 9 is a side view showing the operating state of the peeling claw, FIGS. 10(A) and 10(B) are schematic side views showing the state of water remaining between the heating drum and the bonding roller, and FIG. FIG. 11 is a schematic configuration diagram showing a drive system of a winding roller and a heating drum according to another embodiment;
FIG. 2 is a schematic diagram of the one-way clutch. DESCRIPTION OF SYMBOLS 10... Image recording device, 16... Photosensitive material, 104... Thermal development transfer part, 108... Image receiving material, 116... Heating drum, 118... Endless pressure contact belt, 120... Pasting roller, 134.136.138.140 ... Winding is roller, 194 ... Motor. Figure 3 Figure A Figure 9 Figure 10 Figure 94

Claims (1)

[Claims] (1) A drum that rotates by the driving force of a drive source, and an endless pressure belt that is wound around a plurality of winding rollers and whose outer periphery is in pressure contact with a part of the outer periphery of the drum. The image recording apparatus performs image recording processing by tightly wrapping the image recording material around the outer periphery of the drum as it rotates and conveying the image recording material between the endless pressure belt and the rotational driving force of the drive source. The endless pressure contact belt is applied to one of the plurality of winding rollers to rotate the endless pressure contact belt, and the rotation of the endless pressure contact belt is transmitted by a frictional force between the endless pressure contact belt and the drum to cause the drum to rotate in a driven manner. image recording device.