JPS63170645A - Heat developing device - Google Patents

Abstract

PURPOSE:To prevent a belt from being detached from a roller, and to carry a photosensitive material with high reliability by providing a detecting means for detecting a position shift in the width direction of the belt, and a means for varying the axial direction by moving at least the axial end of one roller, based on a result of detection. CONSTITUTION:When a belt 50 is rotated continuously, the belt 50 slips out in one direction of the width directions. For instance, when the belt 50 slips out by a prescribed quantity to the left, an external sensor 140 detects the belt 50, and a detecting signal is inputted to a control part 146. Based on the detecting signal from the sensor 140, the control part 146 operates a solenoid 144, and when a movable bearing 143 of a belt supporting roller 48 is moved upward, the belt supporting roller 48 slightly turns around the right end bearing, and inclined against a heating roller 44. When the belt supporting roller 48 is inclined, the belt 50 on the belt supporting roller 48 is drawn out in the direction vertical to the axial direction of the belt supporting roller 48, and the belt 50 moves in the direction for correcting a position shift. In such a way, a position of the belt can be corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a photosensitive material in which a support is coated with a substance on which an image formed by imagewise exposure is fixed under pressure. !
The present invention relates to a heat developing device that performs heat development after indium light.

[Conventional technology]

As an example of an image recording material using microcapsules encapsulating a photosensitive composition, for example, Japanese Patent Application Laid-Open No. 57-1798
A system is known in which a synthetic polymer resin wall capsule containing a vinyl compound, a photopolymerization initiator, and a colorant precursor is supported on a support, as disclosed in Japanese Patent No. 36. The image recording method using this system is to imagewise harden the microcapsules by exposure to light, rupture the unhardened microcapsules by applying pressure, and obtain a color image from the released colorant precursor. The method is characterized in that high quality images can be obtained through simple dry processing. However, this system has the drawback of significantly lower photosensitivity than systems using silver halide.

A new recording material that improves these drawbacks, has high photosensitivity, and is capable of obtaining high-quality images through simple dry processing has been proposed in Japanese Patent Application No. 1986-2001 filed by the present applicant.
It is disclosed in the specification of No. 117089. This recording material includes at least a photosensitive silver halide, a reducing agent, and
Coated with a polymerizable compound and a color image-forming substance,
At least the polymerizable compound and the color image forming material are comprised of a photosensitive composition encapsulated in the same microcapsule.

Regarding the image recording method of recording images using this photosensitive material, Japanese Patent Application No. 60-1212 filed by the present applicant
It is disclosed in the specification of No. 84. This image recording method is
First, a latent image is formed by imagewise exposure, and then development is performed by heating, and the polymerizable compound in the area where the latent image exists is polymerized to produce a high molecular compound, thereby hardening the microcapsules. Then, the image-receiving material having an image-receiving layer to which the color image-forming substance can be transferred is stacked and pressurized to rupture at least a portion of the microcapsules in the area where the latent image does not exist, and the color image-forming substance is transferred to the image-receiving material. to obtain an image on an image-receiving material.

Then, using the above-mentioned photosensitive material, this photosensitive material is subjected to imagewise exposure, heat development is performed, and then the image recording material is overlaid with an image-receiving material and pressed, and an image is obtained on the image-receiving material by transfer, which is automatically performed. The device is disclosed, for example, in Japanese Patent Application No. 51896/1989 filed by the present applicant.

In this type of apparatus, the heat developing device has, for example, approximately 12
It consists of a heating roll that is heated to 0°C and an endless belt that is supported by a belt support roll and wrapped around the outer circumference of the heating roll in an arc of approximately 270°, and the photosensitive material is transferred between the heating roll and the endless belt. Heating is performed by holding and conveying the material.

[Problem that the invention seeks to solve]

When the heating device using the endless belt described above is operated continuously, if the parallelism of the belt support rolls is even slightly off, or if the left and right circumferential lengths of the belt are different, the belt will rotate in the width direction. If the belt shifts to either side, the belt will eventually come off the support roll, making it impossible to convey the photosensitive material. Therefore, as a measure to prevent the belt from shifting, the diameter is set at the center in the width direction, and the diameter is set at both ends. One example is a structure in which the belt is supported by a so-called crown roll having a curved peripheral surface with a smaller diameter.

However, in the heat developing device of the image recording device,
Since the ratio of the circumferential length of the support roll to the belt width is small,
Even if a crown roll is used as the support roll, the curvature of the circumferential surface becomes large, and it is not possible to reliably prevent the belt from shifting.

Therefore, in the above-mentioned heat developing device, the problem of the belt being biased to one side in the width direction has not been solved.
There is a need for a heat developing device configured to prevent or compensate for belt misalignment.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide a heat developing device configured to correct the position of the endless belt when the endless belt is misaligned in the width direction.

[Means and effects for solving the problems] The above object of the present invention is to provide a heat developing device for heat developing a photosensitive material having an image formed by imagewise exposure, which comprises a heating roll and a plurality of rolls. , an endless belt that rotates while being stretched over these, a detecting means for detecting a positional shift in the width direction of the belt, and a shaft end of at least one roll is moved based on the detection result to change the axial direction. This is achieved by a heat developing device characterized by comprising means for causing

That is, since the belt stretched over the roll travels in a direction perpendicular to the axial direction of the roll, the traveling direction of the belt can be changed by tilting the roll.

Therefore, by detecting the direction and amount of deviation of the belt and applying an inclination to the roll to compensate for this, it is possible to correct the position of the belt that has caused the deviation.

In the present invention, the photosensitive material refers to a material for obtaining a visible image by applying pressure to a latent image generated by an imagewise exposure point.

Further, the present invention can be applied to both a system in which the exposed portion is polymerized and hardened, and a system in which the exposed portion is depolymerized and softened.

An example of such a material is a type of material in which a polymerizable compound is imagewise cured by imagewise exposure, and then a visible image is obtained by applying pressure, as disclosed in Japanese Patent Application Laid-Open No. 57-1991 filed by the present applicant. The material disclosed in Japanese Patent No. 179836 is mentioned. This material has a synthetic polymer resin wall capsule containing a vinyl compound, a photopolymerization initiator, and a colorant precursor supported on a support.

Alternatively, after containing silver halide and giving imagewise exposure, heat development is performed to develop the silver halide, the polymerizable compound is simultaneously cured in correspondence with this development, and then pressure is applied to form a visible image. The material disclosed in Japanese Patent Application No. 121284/1984 filed by the present applicant is cited as a material of the type obtained by heat development. After that, a color image-forming substance is transferred to an image-receiving material having an image-receiving layer to obtain an image on the image-receiving material, and at least photosensitive silver halide,
A reducing agent, a polymerizable compound, and a color image-forming substance are coated, and at least the polymerizable compound and the color image-forming substance are encapsulated in the same microcapsule.

[Embodiment]

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

FIG. 1 is a sectional view of the image recording apparatus.

In the figure, an exposure device 200 is arranged in the upper part of the housing 1, and a portion including the exposure device ffi 200 is a partition wall 22.
4, it is cut off from other parts.

Exposure device r! 1.200 is an illumination lamp 208 and a mirror 210.212 that integrally scan the entire surface of the glass plate 2 below.
．． 214, an imaging lens/filter unit/nod assembly 216, mirrors 218 and 220 that move in the same direction by a scanning distance A of the illumination lamp 208, and a fixed mirror 222.

An opening 2 is provided in the portion through which the optical axis 226 of the exposure apparatus 200 passes.
28 is provided, and the opening 228 is provided with a shutter device 240.
is placed.

A photosensitive material cartridge 14 containing a photosensitive material roll 12 wound with a photosensitive and pressure sensitive heat-developable color photosensitive material S (hereinafter referred to as photosensitive material) is removably attached to the side of the housing 1. At the outlet 16 of the photosensitive material S of the photosensitive material cartridge 14, a pair of photosensitive material take-out rolls 22,22 housed in the magazine connection dark box 20 are arranged, whereby the photosensitive material S wound on the photosensitive material roll 12 is removed. It is pulled out to a certain length at a predetermined time.

When the leading edge of the photosensitive material S advances, the photosensitive material take-out rolls 22.22 move in a direction away from each other as shown by the imaginary lines to facilitate the advance of the photosensitive material S. A canter unit 23 for cutting the photosensitive material S and a guide plate 24 are arranged in front of the magazine connection dark box 20 (hereinafter, "front" refers to the downstream side in the direction of travel of the photosensitive material, etc.). .

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

A heat developing device 40 that heats and develops the exposed photosensitive material S is arranged in front of the exposed photosensitive material support roll 26 . The heat developing device 40 includes a developing housing 42 having a heat insulating effect, and is disposed within the developing housing 42, and has a diameter of about 120 mm.
An endless bell (50) supported by a heating roll 44 heated to 0.degree. The nip roll 52 is pressed against the nip roll 52.

The heat developing device 40 further includes an exposed light-sensitive material support roll 26.
A guide device 54 guides the photosensitive material S fed from the heating roll 44 onto the heating roll 44 and separates the photosensitive material S from the heating roll 44 after being heated and developed; It has a vertical guide device 58 for guiding to the exit 56, and the exit 56 is provided with a sensor 60 for detecting the tip of the sensitive material.

Directly below the outlet 56, a pair of pressure rolls 62, 64,
A photoreceptor paper stacking device consisting of a nip roll 66 pressed against a pressure roll 64, and a guide member 68 that guides the inspection paper C sent by the pressure roll 64 and nip roll 66 to the contact portion of the pressure rolls 62 and 64. is placed.

An image-receiving paper supply device 72 is disposed on the side of the photosensitive image-receiving paper stacking device 70 . The image-receiving paper supply device 72 includes an image-receiving paper supply cassette 74 that protrudes from the housing 1 and is detachably attached, an image-receiving paper take-out roll 76 for feeding out the image-receiving paper C in the cassette 74, and a feed-out roll 76. The output image-receiving paper C is pressed into contact with the roll 64.
and a guide plate 78 that guides the nip roll 66 to the contact portion. Here, the width of the image receiving &l C is the photosensitive material S
The width of the image-receiving paper C is about 6 fi smaller than the width of the photo-sensitive material S, and the image-receiving paper C is superimposed on the photosensitive material S in the middle direction in the photosensitive material superimposing device 70.

A pair of pressure nip rolls 80.82 and a pressure nip roll 80.8 are provided below the photosensitive image receiving paper stacking device 70.
A transfer device 88 is provided, which includes backup rolls 84 and 86 for equalizing the pressure of the two in the axial direction. Pressure nip roll 80.82 is about 500+r
They are pressed together by a pressure of /-.

A sensitive material image receiving paper peeling device 90 is provided below the transfer device 18. The sensitive material receiving paper peeling device 90 includes a guide member 92
, a first feed roll 94 , a second feed roll 96 , and a peeling belt 102 wrapped around guide rolls 98 and 100 so as to come into pressure contact only with the photosensitive material S at both outer end portions on the first feed roll 94 . It consists of

A sensitive material disposal section 104 is provided on one side of the peeling device 90, and a fixing device i06 is provided on the other side. The photosensitive material disposal unit 104 includes a guide member 108 , a pair of feed rolls 110 , 112 , and a waste box 114 . Throw it into the waste box 114.

The fixing device 106 includes a guide member 120 and a reflecting member 1.
22 and a pair of feed rolls 126 and 128, the image receiving paper C sent from the peeling device 90 and guided by the guide member 120 is irradiated with ultraviolet light for about 3 seconds to fix it. conduct.

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

FIG. 2 is a schematic diagram of the inside of the heat developing device 40, and is a front view taken from the direction of arrow A in FIG.

The heating roll 44 has an endless belt 50 wrapped around the outer periphery of an arc of about 270°, and heats the photosensitive material S while sandwiching it between the circumferential surface and the belt 50. A pair of light reflection type sensors 140 and 141 are provided close to the circumferential surface of the heating roll 44, and these sensors are arranged via one edge of the belt 50. Here, when the belt 50 is in the proper position, the outer sensor 140 faces the heating roll 44 and the inner sensor 141 faces the belt 50.

The belt support roll 48 has one end of a shaft 142 supported by a movable bearing 143, and is configured to be rotatable about the other end as a fulcrum. A pair of solenoids 144 and 145 are arranged facing each other via a movable bearing 143, and the operation of the solenoids 144 and 145 is controlled by a control section 146.

When belt 50 is in the proper position relative to heating roll 44, belt support roll 48 is supported parallel to heating roll 44 by springs 147,148.

Heating roll 44 and belt support roll 46, 47, 48
．． When the belt 50 is continuously rotated by the belt support rolls 46, 47, 48, and 49, the belt 50 may be rotated in the width direction due to a deviation in the parallelism of the belt support rolls 46, 47, 48, or 49, or a difference in circumference between the left and right sides of the belt. For example, when the belt 50 shifts by a predetermined amount to the left in the drawing, the outer sensor 140 detects the belt 50 and a detection signal is input to the control section 146. Based on the detection signal from the sensor 140, the control unit 146 operates the solenoid 144 to move the movable bearing 143 of the belt support roll 4 upward in the figure. Then, the belt support roll 48 rotates slightly around the right end bearing and is inclined with respect to the heating roll 44. When the belt support roll 48 is tilted, the belt 50 on the belt support roll 48 is pulled out in a direction perpendicular to the axial direction of the belt support roll 48, and the belt 50 moves in a direction to correct the positional deviation. Therefore, the upper solenoid 1
44 is activated, the belt 50 moves to the right while rotating.

Solenoid 144 operates for a predetermined period of time until belt 50 returns to its proper position, then stops, or sensor 1
40 is controlled by a control unit 146 to stop when the belt 50 is no longer detected.

In addition, if the belt 50 shifts to the right in the figure by a predetermined amount,
The inner sensor 141 that had previously detected the belt 50
detects the belt 50, and the detection signal that has been continuously input to the control unit 146 is interrupted. and control section 14
6 actuates the lower Trail 145 based on the interruption of the detection signal, and moves the movable bearing 143 of the belt support roll 48 downward in the figure. Then, the heald support roll 48 rotates slightly around the right end bearing and is inclined with respect to the heating roll 44. In this case, the tension of the belt 50 on the belt support roll 48 increases to the left, so the belt 50 moves to the left while rotating. And solenoid 145 is
The controller 146 controls the belt 50 to operate for a predetermined time until the belt 50 returns to its proper position and then stop, or to stop when the sensor 141 detects the belt 50 again.

It is sufficient to have at least one belt support roll tilted with respect to the heating roll 44, and it is preferable to tilt the belt support roll that is away from the heating roll 44 so as not to affect the conveyance of the photosensitive material S. .

Note that in the embodiment described above, the positional deviation of the belt 50 is detected by providing sensors 140 and 141 for detecting the presence or absence of the belt at one side end of the belt 50; The positional shift may be detected by detecting the presence or absence of the belt.

Further, in the embodiment described above, one bearing of the belt support roll 48 is configured to be movable and the other bearing is configured to be rotatable using the other bearing as a fulcrum, but the bearings at both ends are configured to be movable so that each movable bearing The belt support roll 48 may be tilted relative to the heating roll 44 by changing the position of the belt support roll 48 using a solenoid.

Further, the pair of solenoids may be oriented in any direction in the radial direction of the belt support roll.

〔Effect of the invention〕

According to the present invention, when the detection means detects a positional deviation of the belt, the belt support roll is tilted with respect to the heating roll to change the traveling direction of the belt, so that the belt position can be corrected by rotating the belt. can. Therefore, even if the belt becomes misaligned during continuous operation of the heat developing device, it can be immediately returned to the proper position, the belt will not come off the roll, and highly reliable conveyance of the photosensitive material can be guaranteed. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an image recording apparatus equipped with the apparatus of the present invention, and FIG. 2 is a front view of the inside of the heat developing device as viewed from the direction of arrow A. Code in the figure:

Claims (1)

[Claims] A heat developing device that heats and develops a photosensitive material having an image formed by imagewise exposure, and is composed of a heating roll, a plurality of rolls, and an endless belt that rotates while being stretched around these rolls, and the belt is rotated in the width direction of the belt. 1. A heat developing device comprising: a detection means for detecting a positional deviation; and a means for moving an axial end of at least one roll to change the axial direction based on the detection result.