JPH057700B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a heat development transfer device, and more specifically, it improves the adhesion between a heat development photosensitive material and an image receiving material and the meandering of a belt, and also improves the meandering that occurs during conveyance. The present invention relates to a thermal development transfer device having a heat-resistant belt provided with a jam prevention mechanism.

(Prior Art) Black and white heat-developable photosensitive materials characterized in that the developing process is carried out by heat treatment have been known for a long time. A photosensitive material comprising an acid silver salt, a silver halide, and a developer is disclosed. Furthermore, many color heat-developable photosensitive materials are also known, to which this black-and-white photothermographic material is applied.

For example, US Patent No. 3531286, US Patent No. 3761270, US Patent No.
No. 3764328, Research Disclosure (hereinafter referred to as RD)
No.15108, No.15127, No.12044 and
No. 16479 etc. are heat-developable photosensitive materials containing photographic couplers and color developing agents.
U.S. Patent No. 3180731, RD NO.13443 and
No. 14347, etc. include U.S. Patent No. 4235957, RD NO. 14433, and similar products using leuco dyes.
NO.14448, NO.1527, NO.15776, same
No. 18137 and No. 19419, etc., apply the silver dye bleaching method to US Patent No. 4124398.
No. 4,124,387 and No. 4,123,273 describe a method for thermally bleaching photothermographic materials.

However, with these proposals regarding color heat-developable photosensitive materials, it is difficult or impossible to bleach or fix the black and white silver images formed at the same time, or even if it is possible, wet processing etc. are required. It is what you need.

RD NO. 16966 is a heat-developable color photosensitive material in which a color image is obtained by separating a silver image and a dye by releasing a diffusible dye by heat development and transferring this dye to an image-receiving layer. ,
JP 56-50328, JP 57-179840, JP 57-186744, JP 59-12431, JP 59-124339
No. 59-181345, Patent Application No. 58-109293, No. 59
−181604, No. 59-182507, No. 59-179657,
It is described in publications or specifications such as No. 59-182506.

On the other hand, as a developing device and a developing method for heat-developable photosensitive materials, Japanese Patent Application Laid-open Nos. 54-158230 and 54-
No. 158231, No. 55-2281, No. 56-1939, No. 56-
4904 Publications, Research Disclosure No.
16810 and 17623, the method of pressing the material against a heat block for a certain period of time, the method of moving it on the heat block, the method of using a heated drum, the method of blowing hot air, etc., as well as the method of developing using infrared rays, electric current, or microwaves. Methods are known.

In addition to the above, for example, Japanese Patent Application No. 59-247991 discloses a thermal development transfer device comprising a heater block with a built-in heater and a conveyor belt facing the heater block. Also RD
No. 17635 describes a thermal development transfer device consisting of two adjoining belts each heated by a built-in heater.

As mentioned above, the thermal development transfer device that uses a conveyor belt in the heating conveyance section to carry out thermal development or thermal development transfer while conveying the photosensitive material is considered useful because it is automatic and has good thermal development efficiency. This is one of the devices currently available.

However, in a thermal development transfer device using a conveyor belt, in order to ensure reliable conveyance,
If the belt needs to be tensioned with equal force on each drive shaft and is used continuously for a long time,
Occasionally, due to minute movements of the drive shaft or physical changes in the conveyor belt due to heat, it may become impossible to maintain the uniform tension as described above.

When the tension of the conveyor belt loses balance in this way, the conveyor belt meandering occurs, and the photosensitive material being conveyed or the photosensitive material and the image receiving material overlaid thereon are conveyed out of position.
This may cause unevenness in the heat-developed image,
Further, as a result of thermal development in which the photosensitive material and the image-receiving material are overlapped and shifted from each other, the image formed on the image-receiving material may be oriented one-sided or a portion of the image may be missing.

In addition, conveyance by a conveyor belt can be carried out using other means of conveyance,
For example, the conveyance path is longer than conveyance using rollers, and therefore, if a failure occurs in the conveyance system for some reason, it is somewhat troublesome to deal with the failure. For this reason, it is necessary to detect the above-mentioned failure of the transport system as soon as possible and take prompt action.

(Problems to be Solved by the Invention) Therefore, the present invention improves the above-mentioned drawbacks of a thermal development transfer device having a conveyor belt, prevents meandering of the conveyor belt, and further improves the relationship between the photosensitive material and the image-receiving material. It is an object of the present invention to provide a thermal development transfer device that can further strengthen adhesiveness before thermal development and can quickly detect failures that occur in a conveyance system constituted by a conveyance belt.

(Means for Solving the Problems) According to the present invention, the above-mentioned problem of the present invention is to solve the above-mentioned problems of the present invention. In a thermal development transfer device that polymerizes and conveys an image-receiving material that captures a dye-donating substance, a heating member having a curved conveying surface and incorporating a plurality of heating bodies;
A heat-resistant conveyor belt is stretched around a plurality of rotating shafts so as to move in close contact with the heating member, and a plurality of fixtures are connected to the side edges of the heat-resistant conveyor belt to move the rotational axis. As a pre-process in which a chain stretched around a rotating shaft directly connected to the shaft, the heat-developable color photosensitive material and the image-receiving material are inserted between the heat-resistant conveyor belt and the heating member, the temperature is below the development temperature. and a detection member provided in a conveyance drive system to monitor the state of polymerization and conveyance by the heating member and the heat-resistant conveyor belt, wherein the heat-resistant conveyor belt and the chain A heat development method for a heat-developable color photosensitive material, characterized in that the heat-developable color photosensitive material and the image-receiving material are conveyed in close contact between the heat-resistant conveyor belt and the heating member while integrally moving the heat-developable color photosensitive material. This could be achieved using a transfer device.

The present invention will be explained in more detail below.

The color light-sensitive material used in the present invention is a heat-developable color light-sensitive material containing a dye-donating substance that releases a diffusible dye upon heat development, and the diffusion transfer type heat-developable color light-sensitive material is a heat-developable color light-sensitive material that contains a dye-donating substance that releases a diffusible dye upon heat development. After exposing a color image to a photosensitive material, the heat-developable photosensitive material placed in a stacked relationship with the image-receiving layer is heated uniformly, and the diffusible dye released or formed thereby is heated after or simultaneously with heat development. It is particularly useful in a color image forming method in which a color image is obtained by thermal transfer to an image-receiving layer.

Examples of heat-developable photosensitive materials that can be used in the present invention include JP-A-59-52440 and JP-A-59-52440;
154445, No. 59-124327, No. 59-164903, and Japanese Patent Application No. 58-42779, and the positive photothermographic materials described in the specifications of
No. 57-179840, No. 57-198458, No. 59-159159
No. 58-149046, No. 58-149047, No. 59-
No. 12431, No. 59-48705, No. 59-181345 and Japanese Patent Application No. 109238-1987, No. 59-79887, No. 59-
No. 181604, No. 59-182507, No. 59-179657, No. 181604, No. 59-182507, No. 59-179657, No.
Heat-developable photosensitive materials such as those disclosed in publications and specifications such as No. 59-182506 are useful.

Such heat-developable photosensitive materials are known, for example, from Japanese Patent Application Laid-Open No.
−152440, No. 59-154445, No. 59-124320,
Those disclosed in Japanese Patent Application No. 1983-42779 etc. are photosensitive silver halides (which may contain organic silver salts),
A photosensitive material containing an electron donor and/or its precursor, and/or an electron transfer agent, a dye-donating substance that releases a heat-transferable dye when reduced at high temperatures, or a photosensitive silver halide (including an organic silver salt). photosensitive materials containing a dye-providing substance that is oxidized by silver halide, organic silver salt, or both of them in exposed areas at high temperatures and no longer releases thermally transferable dyes.

Such photosensitive materials can be used to create a silver image that is in a negative-positive relationship with the original and a thermally transferable dye that is in a positive-positive relationship by simply performing image exposure and thermal development using normal negative-working silver halide. give.

Another type is a photosensitive material containing a dye-providing substance that releases or forms a heat transferable dye upon heating. Such dye-donating substances include dyes that cause a coupling reaction when heated with an oxidized form of a reducing agent oxidized by silver halide, an organic silver salt, or both, and as a result, are released from the coupling site of the dye-donating substance. Those whose residues become heat transferable dyes (for example, JP-A-57-186744,
No. 57-207250, No. 59-48765, No. 59-116642,
(Described in Publications No. 59-116643 and No. 59-159159)
and those that utilize a heat transferable dye formed by coupling the oxidized form of the reducing agent and the dye-donating substance (e.g., JP-A-58-149046, JP-A-58-149046;
No. 149047, No. 59-124339, No. 59-181345, Patent Application No. 109293-1983, No. 59-79887, No. 59-
No. 181604, No. 59-182507, No. 59-179657, No. 181604, No. 59-182507, No. 59-179657, No.
59-182506 etc.).

Another dye-providing substance is one in which a reducing dye-providing substance is oxidized by silver halide, an organic silver salt, or both upon heating to release a heat transferable dye in the presence of a dye release aid (for example, a special Kaisho 57-179840, Kaisho 57-198458, Kaisho 58-
No. 58543, No. 59-168439, etc.).

These heat-developable photosensitive materials can be image-wise exposed and then heat-developed to form a heat-transferable dye image in an imagewise manner depending on the type thereof.

The image-receiving material that can be used in the present invention is one in which an image-receiving layer capable of receiving a dye released from a heat-developable photosensitive material by heat development is formed on a support. This image-receiving layer contains a dye mordant, and the mordant can be selected depending on the properties of the dye to be released, other components contained in the heat-developable light-sensitive material, transfer conditions, etc. For example, JP-A-57
High molecular weight polymer mordants such as those described in No. 186744 and No. 59-181345 can be used.

Using the color diffusion transfer type heat-developable photosensitive material described above, after imagewise exposure to the photosensitive material, an image-receiving sheet is stacked so that the image-receiving layer is in close contact with the exposed surface, and then the combined photosensitive material is thermally developed, A color image can be obtained by heating the imagewise formed color image onto an image-receiving sheet by thermal diffusion transfer.

In these heat development transfer methods, visible light is used as a light source for image exposure to record a latent image on a heat developable photosensitive material, such as a tungsten lamp, a mercury lamp, a halogen lamp such as an iodine lamp, a xenon lamp, or even a xenon lamp. A laser light source, CRT light source, fluorescent tube, LED, etc. can be used. Further, the exposure method may be a normal full-surface exposure method, or a video image or an image signal sent from a TV station may be scanned and exposed using a lens or in close contact with a CRT or FOT.

Furthermore, any method including slit exposure used in ordinary electrophotography may be used.

The peeling step following the exposure, overlaying, and heat development transfer steps may be performed manually or automatically using known methods.

In the step of overlapping the image receiving sheet and the diffusion transfer type heat-developable photosensitive material, in order to increase the degree of adhesion between the image receiving sheet and the photosensitive material, if necessary, the photosensitive material is It is preferable to preheat the image receiving sheet and the like.

The preferred temperature range for preheating is 80° to 250°C, particularly 100° to 180°C, preferably within a range that does not exceed the development temperature.

Further, the heating temperature in the heating step for thermal development transfer is in the range of about 80° to 250°C, particularly preferably 120° to 200°C.

The transfer of the thermal transfer dye to the image-receiving layer is usually carried out using a diffusion aid built into the heat-developable photosensitive material or the image-receiving sheet, but the peeling process can be carried out in the transfer device by combining a known peeling device. However, it is also possible to carry out the heating process within the apparatus and peel it off by hand. The present invention relates to a heat development method and an apparatus thereof among these steps.

(Examples) Hereinafter, the present invention will be specifically described according to examples shown in the drawings.

1 to 4 show embodiments of the present invention,
FIG. 5 shows a conventional thermal development transfer device.

First, a conventional thermal development transfer device will be explained with reference to FIG.

The thermal development transfer device shown in FIG. 5 is of a type in which a heating conveyance path is constructed by two conveyor belts, upper and lower. In the figure, 1 shows the overall structure of the thermal development transfer device, 2 is an upper conveyor belt of two upper and lower conveyor belts, and 3 is a lower conveyor belt. The conveyor belt 2 can be rotated while being stretched around rotating rollers 5a and 5b, and the conveyor belt 3 can be rotated while being stretched around rotating rollers 4a and 4b.

There are two separate heaters 6a and 6b inside where the lower conveyor belt 3 is stretched.
A heat plate 7 heated by the heaters 6a and 6b is enclosed in a heater chamber 8 and forms a heating member.

The heat plate 7 is pressed against the back surface of the conveyor belt 3, and heats and develops the photosensitive material being conveyed on the conveyance path.

The development temperature by heating in the present invention is 80℃ ~
It is in the range of 200℃. Therefore, the conveyor belts 2 and 3 used in the present invention are each a heat-resistant conveyor belt made of silicone rubber or the like.

According to the present invention, the portion of the heat plate 7 that comes into pressure contact with the conveyor belt 3 has a gentle arc shape, and strongly presses against the back surface of the conveyor belt 3 to apply tension to the conveyor belt 3 . Therefore, the adhesion between the conveyor belt 2 and the conveyor belt 3 on the conveyance path is further improved, and the conveyance of the photosensitive material is excellent.

In the heat development transfer device configured as described above, the heat development photosensitive material is transported by the pair of conveyance rollers 9a.
and 9b, the sheet is pressed and guided, moves to the heating conveyance path, is heated and developed, and is stored in the sheet discharge tray 10.

The reason why two heaters are used in the thermal development transfer device is to facilitate temperature distribution and temperature control during thermal development.

FIG. 1 is a front view showing the general configuration of a thermal development transfer device as an embodiment of the present invention.

In the figure, reference numeral 11 indicates an upper heat-resistant conveyor belt whose edge is locked by a chain and the tension is increased, and 12 is a lower heat-resistant conveyor belt whose end edge is locked by a chain and whose tension is increased. It is a heat-resistant conveyor belt. The locking of the conveyor belt by this chain will be described later.

Each of the chains to which the above-mentioned upper and lower conveyor belts are locked is stretched over a rotating wheel directly connected to the rotating shaft of the rotating roller of the conveyor belt as shown in FIG. It can be rotated in accordance with the rotation of the rotation shaft of the rotation roller. That is, in the figure, 13a and 13b are rotating wheels on which the upper conveyor belt 11, which is latched to the chain, is stretched, and 14a and 14b are rotary wheels, on which the lower conveyor belt 12, which is latched on the chain, is stretched. It is a rotating wheel that is suspended. In addition, 13c and 14c
are the long shaft holes of the rotary wheels for adjusting the tension of the conveyor belts each connected to the chain.

In this way, by locking the edge of the heat-resistant conveyor belt to the chain and applying a strong and equalized tension, the conveyor belt can be used to convey the photosensitive material by pressure contact between the conveyor belt 11 and the conveyor belt 12. The meandering of the photosensitive material is improved, and misalignment of the conveyance of the photosensitive material is prevented. Further, even when the conveyor belt 12 is stretched due to heat, the belt is conveyed reliably without slack.

Furthermore, in the figure, 15 and 16 are a pair of conveyance rollers, and according to the present invention, at least one of the conveyance rollers is a heating roller.
This heating roller is used to preheat the color diffusion transfer photosensitive material in order to more closely overlap the photosensitive material and the image receiving paper when thermally developing the color diffusion transfer photosensitive material. The preheating temperature according to the invention is lower than the thermal development temperature, for example in the range of 100°C to 180°C.

That is, according to the present invention, the apparatus of the present invention exhibits excellent effects when thermally developing color diffusion transfer photosensitive materials, which are particularly useful. In the case of color diffusion transfer photosensitive materials, after image exposure, the photosensitive material is overlapped with image receiving paper, inserted into the pair of preheating conveyance rollers 15 and 16 on the left in FIG. 1, and conveyed to heat-resistant. Conveyor belts 11 and 1
2, the paper is held and transferred by pressure contact, and after being heated and developed, it is discharged onto the paper discharge tray 10.

According to this apparatus, there is no meandering caused by the conveyor belt and there is no shift in the conveyance of the photosensitive material, and therefore a beautiful transferred image can be formed at the correct position on the image-receiving paper.

One of the features of the present invention is that the drive member is provided with a detection means for detecting whether or not the photosensitive material is being conveyed regularly in the thermal development apparatus configured as described above.

In the figure, numeral 17 is a detection member of a detection device disposed on the rotating shaft of a rotating wheel 14a which is a driving conveyance system of the conveyor belt 12, and 18 is a detection element portion of the detection member. Therefore, the detection member 17 can rotate at the same speed as the rotary wheel 14a rotates.

A one-way clutch is press-fitted into the rotating shaft of the detection member 17 in the rotational direction, and the rotational direction is followed, but when the rotation stops, the detection element portion 18 is always positioned in the vertical direction due to its own weight. It is configured so that it does not come into face-to-face contact with a sensor (described later).

19 is a sensor, and the above-mentioned detection member 17
(in the illustrated example, diagonally downward).

According to the present invention, since the detection member and the sensor are arranged as described above, the detection member 17 rotates together with the rotating wheel 14a that rotates the conveyor belt 12, and sends rotation information of the conveyor belt 12 to the sensor as a signal. can be transmitted. Therefore, in the present invention, while the rotation information of the conveyor belt 12 by the detection member 17 is transmitted as a signal to the sensor 19 at regular time intervals, the conveyor belt 12 is correctly rotated at a specified speed, and accordingly, This means that the photosensitive material and image-receiving paper are also transported at a specified speed and are being heated and developed.

Conversely, if the rotation information from the detection member 17 is not transmitted as a signal to the sensor 19 at correct time intervals, this means that an abnormality has occurred in the rotation of the conveyor belt 12.

The above-mentioned detection member 17 and sensor 1 according to the present invention
The detection device consisting of 9 can use a wide variety of conventionally known detection methods, such as magnetic, optical, and electrical.

For example, if a magnetic sensor is used as the sensor 19 and a magnetic material is used in the detection element section 18, rotation information can be obtained magnetically.Also, if a light emitting device is used as the sensor 19 and a reflective member is used in the detection element section 18, rotation information can be obtained magnetically. For example, rotation information can be obtained optically.

According to the present invention, the signal obtained magnetically and optically as described above is sent from the sensor to the detection circuit, and then the judgment circuit judges whether it is normal or abnormal, and if it is abnormal, a warning is issued. or can be controlled.

The control referred to in the present invention means, for example, separating the conveyor belt from the drum or stopping heating of the heater.

FIG. 2 shows another embodiment of the present invention, which relates to a thermal development transfer device of a type in which a heating conveyance path is constituted by a drum and a conveyance belt.

In the figure, 20 is a conveying drum that can rotate in the direction of the arrow. Reference numeral 21 denotes a heat-resistant conveyor belt with a chain attached to its edge, which is in pressure contact with the drum 20 to form a semicircular heated conveyor path, and is directly connected to the rotating shaft of the rotating roller of the conveyor belt. The drum 20 is stretched around rotating wheels 22a, 22b, and 22c, and can rotate in the direction of the arrow at the same speed as the drum 20. Note that 22d is a long shaft hole of the rotating wheel for adjusting the tension of the conveyor belt that is engaged with the chain.

A heater 23 and a heat insulating member 24 are both built inside the heat-resistant conveyor belt 21 to form a heating member. The heater 23 is formed in a semicircular shape according to the shape of the conveyor belt 21 forming the heating conveyance path, and is placed in close contact with the back surface of the conveyor belt 21 to heat the belt. Thermal development temperature ranges from 80° to 200°C.

After imagewise exposure of the photosensitive material 26 as described above, the photosensitive material 26 is placed over the image receiving paper and inserted between the pair of preheating conveyance rollers 15 and 16 as in FIG. The material is transferred to the conveyance path through the A drum 20 and a heat-resistant conveyor belt 2 connected to a chain rotating at the same speed as the drum 20
1, the photosensitive material and the image-receiving paper are sandwiched and pressed while being overlapped, heat-developed while being conveyed, and then discharged from the discharge 27.

The above-mentioned detection means for detecting the conveyance state is also useful in a thermal development transfer device in which a heating conveyance path is formed by such a drum and a conveyance belt.

In the example shown, 17, 18 and 19 are
This is the same as the case of the detection device in FIG. The detection member 17 is disposed on the rotating shaft of the rotary wheel 22c forming the drive conveyance system of the conveyor belt 21, and can therefore rotate at the same speed as the rotary wheel 22c rotates.

The mechanism, performance, effects, etc. of the detection device in this embodiment are all exactly the same as those of the thermal development transfer device shown in FIG.

FIG. 3 is a top view showing a partial configuration of a locking member for locking the conveyor belt to the chain.

In the figure, 30 is a heat-resistant conveyor belt;
Reference numeral 1 denotes a chain stretched around a rotating wheel directly connected to the rotating shaft of the conveyor belt 30. Further, 32 is a fitting, that is, a locking member for attaching the chain 31 to the edge of the conveyor belt 30, and one end of this locking member is fixed to the chain 31. In this case, the edges of the conveyor belt 30 may be on one side of the belt or on both sides, but it is preferable that the chains are engaged with the edges on both sides. Further, 33 is a set screw hole for locking the locking member 32 to the conveyor belt 30, but other locking methods may be used.

According to the present invention, the heat-resistant conveyor belt 30 is secured by the chain 31 as described above.
In the conveyance process by the conveyor belt which is applied with stronger tension and rotates integrally with the chain, no conveyance wobbling occurs.

FIG. 4 is a sectional view showing a schematic configuration when chains are respectively locked to the edges of the two upper and lower conveyor belts.

In the figure, 34 is an upper heat-resistant conveyor belt;
Further, 35 is a lower heat-resistant conveyor belt. Further, 36 is a rotating shaft of a rotating roller of the conveyor belt 34;
7 is a rotating shaft of a rotating roller of the conveyor belt 35. Rotating wheels 38 and 39 are directly connected to the rotating shafts 36 and 37, respectively, and can rotate as the rotating shafts are driven.

Said pivot wheels 38 and 39 can engage chains 40 and 41, respectively, so that chains 40 and 41 connect pivot wheels 38 and 3
It can be rotated along with the rotation of 9. In the figure, reference numerals 42 and 43 refer to fittings, that is, locking members, to the conveyor belts whose ends are fixed to the chains 40 and 41, respectively, and which tension the conveyor belts at the ends of the conveyor belts 34 and 35, respectively. , is locked.

As is clear from the figure, the upper conveyor belt 3
The locking member 42 of No. 4 and the locking member 43 of the lower conveyor belt 35 have different lengths. This is to prevent the chains from colliding with or coming into contact with each other when the rotating upper conveyor belt 34 and lower conveyor belt 35 come into contact with each other on the heating conveyance path.

The effect of attaching the chain to the conveyor belt using the locking member so as to uniformly increase the tension has already been described above.

(Effects of the Invention) In the apparatus of the present invention, a preheating section is provided as a pre-processing step of the developing process of the thermal development transfer device in which a heating conveyance path is configured by a conveyor belt, and a chain that rotates together with the conveyor belt is used to uniformly apply heat to the conveyor belt. A strong tension is applied, and a detection device that monitors the conveyance status is placed in the drive conveyance system, making it possible to closely overlap the photosensitive material and image-receiving paper, and also eliminating meandering of the conveyor belt. Therefore, there is no transport misalignment between the photosensitive material and the image-receiving paper, and a beautiful image can always be formed at a prescribed position on the image-receiving paper.

In addition, even if an abnormality occurs in the conveyance system or drive system, the detection device can quickly detect it.
Accidents due to breakdowns can also be prevented.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the general structure of a thermal development transfer device as an embodiment of the present invention, and FIG. 2 is a front view showing the general structure of a heat development transfer device as another embodiment of the invention. , FIG. 3 is a top view showing a partial configuration of a chain locking member, FIG. 4 is a cross-sectional view showing a schematic configuration of two upper and lower conveyor belts locked to the chain, and FIG. FIG. 1 is a front view showing a general configuration of a conventional thermal development transfer device. 1... Overall configuration of thermal development transfer device, 6a, 6b
and 23... heater, 7... heat plate,
11, 12 and 21...conveyor belts latched to chains, 13a, 13b, 14a, 14b,
22a, 22b, 22c, 38 and 39... Rotating wheel, 15 and 16... Preheating section, 17...
Detection member, 18...Detection element portion, 19...Sensor, 20...Drum, 31, 40 and 41...
Chain, 32, 42 and 43...locking member,
34 and 35...conveyor belt, 36 and 37
...Rotation axis.

Claims (1)

[Scope of Claims] 1. A heat-developable color photosensitive material containing a dye-donating substance that releases a diffusible dye upon heat development and an image-receiving material that captures the released dye-donating substance are polymerized and transported. A thermal development transfer device includes a heating member having a curved conveyance surface and a plurality of built-in heating elements, a heat-resistant conveyor belt stretched around a plurality of rotating shafts so as to move while closely contacting the heating member; a chain connected to the side edge of the heat-resistant conveyor belt by a plurality of fixtures and stretched around a rotating wheel directly connected to the rotating shaft; As a pre-process inserted between the heat-resistant conveyor belt and the heat-resistant conveyor belt, a preheating section is preheated at a temperature below the development temperature; and for monitoring the state of polymerization and conveyance by the heat-resistant conveyor belt and the heat-resistant conveyor belt. and a detection member provided in a conveyance drive system, and while the heat-resistant conveyance belt and the chain are moved integrally, the heat-developable color photosensitive material and the A heat development transfer device for heat development color photosensitive materials, which is characterized by conveying an image receiving material in close contact with the material.