JPH0456856A - Image forming device - Google Patents

Abstract

PURPOSE:To prevent soiling of a surface of a photosensitive material by moving and retreating a pulling-out roll when a starting tip of a photosensitive recording medium is guided to a position immediately before a position facing a pulling out roll by a leader tape. CONSTITUTION:When the starting tip part of a photosensitive recording medium 14 is guided to a position immediately before a position facing the pulling-out roll 28 by a leader tape, a control means 41 is provided to move and retreat the pulling-out roll 28. After that, the leader tape is further transported, and when its leading tip is wound up to a winding roll, the procedure of paper passage of the photosensitive recording medium 14 is completed when guide members 30 to 32 are moved from an operating position to this non-operating position. Thus, soiling is not caused by a pulling-out roll 28 coming into contact with the photosensitive surface of the photosensitive recording medium 14 during the paper passage operation of the photosensitive recording medium 14.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image forming apparatus such as a copying machine, and in particular, to an image forming apparatus such as a copying machine, etc. The present invention relates to an image forming apparatus that performs development to obtain an output image.

[Prior Art] In a conventional image forming apparatus of this type, a photosensitive recording medium is placed in a conveyance path between a loading position of the photosensitive recording medium and a winding roller for winding up the used photosensitive recording medium. A pull-out roller for transferring the leader tape provided at the starting end and a kite member for guiding the transfer of the leader tape are each provided movably between an active position and a non-active position, and the photosensitive recording medium When loaded into the main body of the apparatus, the pull-out roller and the kite member are moved to the operating position, and the pull-out roller and take-up roller are also rotated, so that the leader tape is placed on the conveyance path and is moved to the take-up roller. The photosensitive recording medium is then transported upward.

[Problems to be Solved by the Invention] In this conventional device, when a photosensitive recording medium is fed, when one leader chi is transported by a predetermined amount and its leading end is wound up on the take-up roller, the pull-out roller and guide The members are simultaneously moved from the working position to the non-working position, and the sheet feeding operation of the photosensitive recording medium is completed.

Therefore, even after the leading edge of the photosensitive recording medium passes through the position corresponding to the pull-out roller while the photosensitive recording medium is being fed, the leader tape cannot be pulled out until the leading edge of the leader tape is wound onto the take-up roller. The roller is placed in the working position! The leader tape is in contact with the photosensitive agent surface of the photosensitive recording medium, and the outer circumferential surface of the pull-out roller becomes smeared, resulting in a problem in that the ability to transport the leader tape during subsequent sheet feeding operations is significantly reduced.

In addition, in the conventional configuration described above, since the pull-out roller is placed in the operating position until the end of paper feeding, the amount of feed by the pull-out roller and the feed provided on the conveyance path between the pull-out roller and the take-up roller are If the amount of feed by the rollers does not match, there is a problem in that the photosensitive recording medium becomes too tense or slack between the pull-out roller and the feed roller, and is not stably transferred.

In particular, in a device that is provided with an elastically deformable leader holder that corresponds to the pull-out roller, and is configured to transfer the leader tape while being held between the pull-out roller and the leader holder that have been moved to the operating position, Since the rubber hardness of the outer circumferential surface of the roller is set low, it is extremely difficult to accurately match the feed amount of the pull-out roller and the feed roller, considering the fluctuation of the feed amount due to the elastic deformation of this rubber. there were.

The present invention has been made by focusing on the problems existing in the conventional technology, and its purpose is to prevent the pull-out roller from exposing the photosensitive recording medium during the feeding operation of the photosensitive recording medium. It is possible to prevent the possibility of contact with the agent surface and cause stains, and it is possible to reliably prevent the transfer ability of the pull-out roller from decreasing during the subsequent sheet feeding operation, and also to prevent the feeding roller between the pull-out roller and the feed roller. Even if the amounts are not exactly matched, the photosensitive recording medium can be stably fed between the pull-out roller and the feed roller without causing excessive tension or slack on the photosensitive recording medium, and the device An object of the present invention is to provide an image forming apparatus that can simplify and reduce costs.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes an exposing means for exposing a long photosensitive recording medium to form a latent image; a winding roller for winding up the photosensitive recording medium after use; and a predetermined conveyance path that connects a leader tape provided at the starting end of the photosensitive recording medium to the winding roller when the photosensitive recording medium is loaded. A pull-out roller is provided movably between an active position and a non-active position in order to pass the leader tape through the conveyance path, and a pull-out roller is provided between the active position and the non-active position in order to guide the transfer of the leader tape by the pull-out roller. In an image forming apparatus equipped with a movably provided guide member, the leader tape is transported to a take-up roller in a predetermined manner by rotation of the pull-out roller, with the pull-out roller and the guide member being moved to the operating position. When the leader tape is passed through the path by a predetermined amount and the starting end of the photosensitive recording medium is moved to a position just before the position corresponding to the pull-out roller, the pull-out roller is retracted from the working position to the non-working position. It is equipped with a control means for controlling the operation.

[Function] In the image forming apparatus configured as described above, when a new photosensitive recording medium is loaded into the apparatus and the photosensitive recording medium is fed, the pull-out roller and the kite member are inoperative. In this state, the pull-out roller, take-up roller, etc. are rotated, and the leader tape provided at the starting end of the photosensitive recording medium is fixed to a predetermined conveyance path to the take-up roller. be transported.

Then, when the leader chi 1 is moved by a predetermined lid and the starting end of the photosensitive recording medium is transported to a position just before the position corresponding to the pull-out roller, the pull-out roller is retracted from the working position to the non-working position.

Thereafter, with the rotation of a feed roller, etc. provided on the conveyance path between the pull-out roller and the take-up roller, the leader tape is further transported, and when its leading end is wound onto the take-up roller, the guide member is moved from the action value 1 to the non-action position, and the sheet feeding operation of the photosensitive recording medium is completed.

Therefore, when this photosensitive recording medium is fed, there is no risk that the pull-out roller will come into contact with the photosensitive agent surface of the photosensitive recording medium and cause stains, and the transfer ability of the pull-out roller will be prevented from decreasing in the subsequent paper-feeding operation. It can definitely be prevented. In addition, since the photosensitive recording medium does not come into contact with the pull-out roller and the feed roller at the same time and is transferred, the feed amount of the pull-out roller and the feed roller does not have to match exactly. Between the feed roller,
There is no fear that undue tension or slack will occur in the photosensitive recording medium, and the photosensitive recording medium can be passed in a stable state.

[Solid Line Example] Hereinafter, one embodiment of a color copying machine embodying the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the main body 1 of the copying machine has a substantially box-shaped structure, and the top thereof includes a document table glass 3 on which a document 2 can be placed, and a cover 4 that covers the document table glass 3 in an openable and closable manner. is provided. The light source 5 is disposed below the original platen glass 3 so as to be movable left and right, and includes a halogen lamp 6 as an exposure lamp that irradiates light onto the original 2 on the original platen glass 3, and a halogen lamp 6 that emits light from the halogen lamp 6 onto the original platen glass. 3 and a plurality of reflecting mirror bodies 7 that reflect the light toward the original 2 on the original 3.

Then, the light source 5 is moved by a motor (not shown) with the halogen lamp 6 emitting light, and the entire document 2 is irradiated with light.
A plurality of reflective mirrors 9 whose positions are adjustable to adjust the optical path length and focus, a condensing lens 10, and a filter 11 to adjust the color tone of the copied image are arranged between the exposure table 8 and the exposure table 8. It is set up.

The light source 5, the exposure table 8, etc. constitute an exposure means, and the light reflected from the original 2 after being irradiated onto the original 2 passes through the reflecting mirror 9, the lens 10, and the filter 11 to the exposure table 8. be led upwards.

The cassette 12 is removably installed inside the copying machine main body 1, and a take-up roller 13 is rotatably supported on the negative side thereof. A long microcapsule paper 14 as a photosensitive recording medium is housed in a wound state in a cassette 12.
Microcapsules containing dyes for color copying, etc. are provided on the surface. Then, the feed roller 15 and a
As the m-roller 13 rotates, the microcapsule paper 14 is pulled out from the cassette/soto 12, conveyed via the feed roller 15 and guide roller 16, and wound around the take-up roller 13, where it is exposed to light. When passing over the table 8, a portion of the microcapsule paper 14 is exposed to form a latent image of original IF+2.

A cartridge 17 is removably attached to the copying machine main body 1 below the exposure table 8, and a predetermined size of paper 18 is accommodated in the cartridge 17. A paper feeder 19 is disposed opposite to the cartridge 17, and the paper feeder 19 feeds paper sheets 18 one by one from inside the cartridge 17. Pressure developing device 2 as developing means
0 is disposed between the exposure table 8 and the take-up roller 13, and the exposed portion of the microcapsule paper 14 and the color developing paper 18 are brought into pressure contact within this pressure developing device 20, so that the image on the microcapsule paper 14 is A color image based on the latent image is formed on developer paper 18.

A plurality of feed rollers 21 and paper kites 22 are provided between the cartridge 17 and the pressure developing device 20, and as the feeding rollers 21 rotate, the color developing paper 18 is transferred to the pressure developing device 20 along the paper guide 22. be done. The peeling roller 23 is provided on the paper feeding side of the pressure developing device 20,
The color developer paper 18 is peeled off from the microcapsule paper 14 by the peeling roller 23.The heat fixing device 24 is disposed on the paper feeding side of the peeling roller 23, and the color developer paper 18 is separated from the microcapsule paper 14 by the heat fixing device 24. Heater 2 as a means
The image on the color developing paper 18 is heated and fixed by being transferred by the transfer roller 26 while being heated by the developer paper 18, and then,
The color developing paper 18 is discharged and stored on the tray 27.

Next, the autoloading mechanism for feeding the microcapsule paper 14 to a predetermined transport path to the take-up roller 13 after newly loading the cassette 12 into the copying machine main body 1 will be described. A half-moon-shaped pull-out roller 28 is disposed so as to be movable between an upper inactive position and a lower active position, facing the draw-out opening of the cassette 12, and is elastically deformable in the corresponding position of the pull-out roller 28. A reader holder 29 is also arranged. Then, by rotating the pull-out roller 28 while being moved to the operating position, the leader tape provided at the starting end of the microcapsule paper 14 is removed while being held between the pull-out roller 28 and the leader holder 29. The paper is transported and passed through a predetermined transport path leading to the take-up roller 13.

The separation chute 30, the upper winding guide 31, and the lower winding guide 32, which serve as guide members, move between an inactive position shown by a solid line in FIG. 1 and an active position shown by a chain line in the transport path of the tape. possible. When the leader tape is passed by the pull-out roller 28, the separation chute 30, the upper winding guide 3
1 and the lower winding guide 32 are moved to the operating position, so that the leader cheese is guided onto the winding roller 13 along the conveyance path.

Next, the control circuit of the copying machine configured as described above is connected to the second
This will be explained according to the diagram.

A central processing unit (CPU) 41 constitutes a control means.
A detection signal corresponding to the amount of conveyance of the microcapsule paper 14 or the leader tape is sent via the input interface 43 from an encoder 42 provided on a motor 44 for rotationally driving a feeding mechanism including the feed mechanism 5 and the pull-out roller 28. is input. Moreover, from the CPU 41, the above-mentioned feed ll1
A solenoid 45 for moving the motor 44 for H1l to the pull-out roller 28 between an active position and a non-active position.
, and the separation shoe 30 and the upper and lower winding guides 31 and 32
An activation or deactivation signal is output via an output interface 47 and drive circuits 48-50 to a solenoid 46 for moving the guide member between an active position and a non-active position.

When the cassette 12 is newly loaded into the copying machine main body 1 and the microcapsule paper 14 is to be passed through, the CPtJ 41 outputs an activation signal to both solenoids 45 and 46, and the pull-out roller 28° separation shoe and 30, the upper winding guide 31 and the lower winding kite 32 are moved from the inactive position to the working position, and the motor 44
outputs an activation signal to the pull-out roller 28. The feed roller 15, the take-up roller 13, etc. are rotated to transport the leader tape provided at the starting end of the microcapsule paper 14 along a predetermined conveyance path to the take-up roller 13.

Further, the CPU 41 controls, when the leader tape is transferred by a predetermined amount during the feeding operation of the microcapsule paper 14 and the starting end of the microcapsule paper 14 is transferred to a position immediately before the position corresponding to the pull-out roller 28. Based on the detection signal from the encoder 42, a stop signal is output to the solenoid 45 for moving the pull-out roller, and the pull-out roller 28 is retracted from the working position to the non-working position. Furthermore, C
The PU 41 detects the detection from the encoder 42 when the leader chi 1 is further transferred with the rotation of the feed roller 15 etc. after the retracting movement of the pull-out roller 28 and its tip is wound onto the winding opening roller 13. Based on the signal, a stop signal is output to the solenoid 46 for moving the guide member, and the separation shoe 30, the upper winding kite 31, and the lower winding guide 32 are moved from the active position to the non-active position.

Next, the operation of the copying machine configured as described above will be explained according to the flowchart shown in FIG.

Now, in this copying machine, when the cassette 12 is newly loaded into the copying machine main body 1 and the microcapsule paper 14 is to be passed through, both solenoids 45 and 46 are operated under the control of the CPU 41. Then, the pull-out roller 28 is moved from the upper inactive position to the lower working position where it contacts the leader holder 29, and the separating shoe 30,
The upper winding guide 31 and the lower winding guide 32 are moved from the inactive position shown by the solid line in FIG. 1 to the working position shown by the chain line (steps 81 to S3).

In this state, the motor 44 is driven to rotate, and the pull-out roller 28, feed roller 15, take-up roller 13, etc. are rotated, and the leader tape provided at the starting end of the microcapsule paper 14 reaches a predetermined position reaching the Ih take-up roller 13. (step S4).

Then, the leader tape is transferred by a predetermined amount, and the leading end of the leader tape reaches the feed roller 15, and the starting end of the microcapsule paper 14 reaches the pull-out roller 2.
8, the CPU 41 outputs a stop signal to the solenoid 45 for moving the pull-out roller based on the detection signal from the encoder 42, and the pull-out roller 28 moves from the working position to the non-working position. (steps 85 to S6).

Further, after the pull-out roller 28 is retracted, the leader tape is further transferred as the feed roller 15 and the like rotate, and when the leading end of the leader tape is wound onto the take-up roller 13, a detection signal from the encoder 42 is sent. ,CPU4
1 outputs a stop signal to the solenoid 46 for moving the guide member, and the separation shoe 30, the upper winding guide 31, and the lower winding guide 32 are moved from the operating position to the inactive value 1 (steps 87 to S8). , along with the CPU41
A stop signal is output to the motor 44, and the feed roller 15
Then, the rotation of the winding roller 15 and the like is stopped, and the paper passing operation of the microcapsule paper 14 is completed (step S9).

Therefore, during the paper passing operation of the microcapsule paper 14, there is no risk that the pull-out roller 28 will come into contact with the photosensitive agent surface of the microcapsule paper 14 and cause stains, and the transfer ability of the pull-out roller 28 will be reduced in the subsequent paper-passing operation. It is possible to reliably prevent a decrease in the temperature. Also, the microcapsule paper 14 is pulled out by the pull-out roller 28 and the feed roller 15.
Since the paper is not transferred by simultaneously contacting the pull-out roller 28 and the feed roller 15, the feed amount of the pull-out roller 28 and the feed roller 15 does not have to match exactly.
5, there is no fear that undue tension or slack will occur in the microcapsule paper 14, and the microcapsule paper 14 can be passed in a stable state.

Note that the present invention is not limited to the configuration of the above-mentioned embodiments, and various parts may be modified without departing from the spirit of the present invention, such as changing the structure for transporting the leader tape by the pull-out roller 28 and the kite member as appropriate. It is also possible to change the configuration arbitrarily and implement it.

[Effect of the invention] Since this invention is configured as explained above,
It is possible to prevent the possibility of the pull-out roller coming into contact with the photosensitive agent surface of the photosensitive recording medium and causing stains during the paper-feeding operation of the photosensitive recording medium, and to prevent the transfer ability of the pull-out roller from decreasing during the subsequent paper-feeding operation. In addition to being able to reliably prevent this, even if the feed amounts of the pull-out roller and the feed roller do not match exactly, undue tension or slack will not occur in the photosensitive recording medium between the pull-out roller and the feed roller. , the photosensitive recording medium can be passed in a stable state, and the apparatus can be simplified and inexpensively produced, which is an excellent effect.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an actual example of a color copying machine embodying the present invention, FIG. 2 is a block diagram showing its control circuit, and FIG. 3 is a flowchart showing the automatic loading operation of microcapsule paper. . 5... Light source constituting the exposure means, 8... Exposure table constituting the exposure means, 12... Cassette, 13... Winding roller, 14... Microcapsule paper as a photosensitive recording medium, 20...pressure developing device as developing means, 2
8... Pull-out roller, 30... Separation chute as a guide member, 31... Upper winding guide as a guide member, 32... Lower winding guide as a guide member, 41... Control means The CPU that makes up the. Patent applicant Brother Industries Co., Ltd. Agent
Patent attorney On 1) Hironobu (and 1 other person)

Claims (1)

[Scope of Claims] 1. Exposure means (5, 8) that exposes a long photosensitive recording medium (14) to form a latent image, and developing means (20) that develops the latent image after exposure. and the used photosensitive recording medium (14
) and a winding roller (13) for winding up the photosensitive recording medium (14), and a leader tape provided at the starting end of the photosensitive recording medium (14) when loading the photosensitive recording medium (14). a pull-out roller (28) movably provided between an active position and a non-active position for passing through the conveyance path;
In order to guide the transfer of the leader tape by the pull-out roller (28), guide members (30, 31,
32), the pull-out roller (28) and the guide member (30, 3
1, 32) are moved to the operating position, when the leader tape is passed through a predetermined conveyance path leading to the take-up roller (13) by the rotation of the pull-out roller (28), the leader tape is moved by a predetermined amount. Control for retracting the pull-out roller (28) from the working position to the non-working position when the starting end of the photosensitive recording medium (14) is transported to a position just before the position corresponding to the pull-out roller (28). means(
41).