JPH03278044A - Instant photograph type copying device - Google Patents

Abstract

PURPOSE:To prevent deflection from occurring to a light shielding film, to prevent excessive tensile force from being given to it while copying is executed and to surely shield light by always giving the proper tensile force to the light shielding film with the aid of a tensile force imparting means. CONSTITUTION:A photosensitive surface 9c and a printing surface 9b which forms the inverted image of an image formed on the surface 9c as a visible image are provided. Besides, an instant photograph photosensitive material 9 that the surface 9c is opposed to an original picture 1 in parallel and an optical means 15 which is positioned between the picture 1 and the surface 9c and which forms the image of the fine area of the picture 1 on the surface 9c as an erect real image are provided. Then, a driving means which moves the optical means 15 in parallel with the picture 1, a light source 24 with which the picture 1 is irradiated, the flexible light shielding film 34 which is fixed to the optical means 15 or the carrier thereof under a state that the optical means 15 is exposed and the tensile force giving means which gives the tensile force to the film 34 are provided. Thus, the deflection is prevented from occurring to the film 34 or the excessive tensile force is prevented from being given to it during the copying. Besides, the light is perfectly shielded and the film 34 is prevented from being damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an instant photocopying apparatus for copying manuscripts, original drawings, photographs, and the like.

(Prior Art) In a conventional instant photocopying device, a light shielding film is provided to prevent unnecessary light from reaching the photosensitive surface of the instant photosensitive material. That is, a pair of winding pipes are provided below both ends of the instant photographic photosensitive material, a shaft is fixed to one end of the winding repipe and is rotatably supported by a bearing, and the winding pipe is rotatably supported by a bearing. a winding means having a belt pulley fixed to the other end of the winding repipe and rotatably supported by a bearing, further comprising an optical means located between the original image and the photosensitive surface; a carrier for holding the optical means; a timing belt wound between the pair of belt pulleys and a part of which is attached to the carrier; a driving means for driving the belt pulley; and a timing belt for driving the belt pulley; and a light-shielding film stretched between the pair of winding pipes.

When copying an original image, the carrier is moved by a drive means via a belt wheel and a timing belt, and reflected light from the original image enters an optical means and forms an image on a photosensitive surface to form a latent image. At this time, the pair of winding pipes rotate together with the belt pulley, and as the carrier moves, the light shielding film is pulled out from one winding pipe, and the light shielding film is wound onto the other winding pipe.

(Problem to be Solved) The moving speed of the carrier is set constant based on the radius of the timing belt wound around the belt pulley and the angular velocity of the belt pulley. On the other hand, when copying an original picture, 1
The circumferential speed of the part wound around the pair of winding pipes changes depending on the number of windings of the light-shielding film, which changes as the carrier moves. There was a risk that the film would be deflected or excessive tensile force would be applied, resulting in incomplete light shielding or damage to the light shielding film.

An object of the present invention is to provide a light-shielding film stretched between a carrier and a winding pipe with appropriate tension, to prevent the light-shielding film from being bent during copying or applying excessive tensile force, The objective is to completely block light and prevent damage to the light shielding film.

(Means for Solving the Problems) In order to solve the above problems, an instant photocopying apparatus according to the present invention includes a photosensitive surface and a printing surface that forms an inverted image of the image formed on the photosensitive surface as a visible image. an instant photographic photosensitive material having the photosensitive surface facing parallel to the original image; and an instant photographic photosensitive material located between the original image and the photosensitive surface, the line area of the original image being formed as an erect real image on the photosensitive surface. an optical means for forming an image, a driving means for moving the optical means parallel to the original image, and a light source for illuminating the original image;
A flexible light-shielding film is fixed to the optical means or its carrier in a state where the optical means is exposed, and a tension applying means is provided for applying tension to the light-shielding film.

(Function) Appropriate tension is always applied to the light-shielding film by the tension applying means.

Therefore, it is possible to prevent the light-shielding film from being bent or subjected to excessive tensile force during copying, to ensure complete light-shielding, and to prevent damage to the light-shielding film.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 to 3, the bottom plate 2a of the case 2 placed on the original painting 1 is formed with a window hole 2b through which the original painting 1 can be seen. A transparent plate 3 made of resin or the like is fixed so that its bottom surfaces are flush with each other. Further, an opening 2d is formed in the upper plate 2C in a positional relationship opposite to the window hole 2b of the bottom plate 2a.

The cassette holder 4 has a window hole 4a on the bottom surface.
It is fixed to the case 2 via a spacer 7 with the window hole 4a and the opening 2d facing each other. Cassette holder 4
is provided with an upper M4b for loading and unloading film cassettes, and the upper lid 4b is rotatably supported around a shaft 5 at the left end of the cassette holder 4 body. A lock arm 4C is attached to the right end of the cassette holder 4 body to lock the upper M4b in the closed state.

A cassette 10 containing a plurality of peelable instant films (instant photographic photosensitive materials) 9 is attached to a cassette holder 4. The instant film 9 is divided into two parts at the rear end of the pull-out tongue piece 9a, and a printing film (printing surface) 9b and a photosensitive film (
The photosensitive surfaces 9c are fixedly facing each other, and a developer 9d in a bag is attached to one of the two forks. Inside the cassette 10, the instant film 9 is folded and stored, and the lowest photosensitive film 9C is exposed through the window hole 10a made on the bottom surface of the cassette 10, with the cassette 10 set in the holder 4. Here, the photosensitive film 9C is parallel to the bottom plate 2a and faces the window hole 2b. By passing the drawer tongue 9a between a pair of rollers 12 and 12 attached to the cassette holder 4 and pulling it out, the bag containing the developer is torn and the developer is spread between the printing film 9b and the photosensitive film 9C. Development and fixing are performed.

Next, as shown in FIGS. 1 to 3, a pair of guide shafts 13 are provided on both sides of the case 2 in parallel to the bottom surface of the case 2, and both guide shafts 13 are attached to both ends of the carrier 14. The provided through holes and U-shaped grooves are passed through. Therefore carrier 1
4 is guided by a guide shaft 13 and is movable parallel to the original image 1.

A long groove 14a is formed in the center of the carrier 14.
A rod lens array (optical means) 15 (
For example, SELFOC Lens Array (trade name) is held. The rod lens array 15 is configured to form an image of a narrow band-shaped area of the original image 1 in contact with the lower surface of the transparent plate 3 on the photosensitive film 9C in an erect, same-size image.

A mounting bracket 17 is attached to the carrier 14 at the left end in FIG.
A part of an endless timing belt 19 is fixed by a mounting screw 18, and the timing belt 19 is wound around a belt pulley 21 that is pivotally supported by a bearing 25, which will be described later. It is configured to rotate in conjunction with the rotation of a drive motor 23, which is part of a drive means fixed to the case 2. Therefore, by rotating the drive motor 23 in forward and reverse directions, the carrier 14 can reciprocate. Note that a limit switch (not shown) for regulating the movement range of the carrier 14 is provided inside the case 2.

A light source 24 is attached to the carrier 14. A fluorescent tube is used as a light source. A mask (not shown) in which a slit-shaped aperture is opened at a position facing the original image below the rod lens array 15 is fixed to the outer periphery of this fluorescent tube, and the illuminance of the line area of the original image 1 to be copied is It is set to increase.

Bearings 25 are provided above and below the left and right sides in FIG. 2, and tension applying means 26 for applying tension to the light shielding film (light shielding film) 34 is rotatably supported on the bearings 25. That is, the tension applying means 26 consists of a winding vibrator 27 and a coil spring 31, which will be described later.
7 is provided outside the range of movement of the carrier 14. A shaft 28 is fixed to one end of the winding vibrator (winding drum) 27, and a shaft (member) 2 is fixed to the other end of the winding vibrator 27.
9 is loosely fitted in a rotatable manner. Inside the winding vibrator 27, there is a coil spring (biasing spring) between the shaft 28 and the shaft 29.
31 is connected to the light-shielding film 34 in a manner that it is wound tightly by a certain amount in order to apply a spring force to the light-shielding film 34 in the winding direction. The shaft 29 is fixed to the belt pulley 21 via an extension rod 30. Thereby, the shaft 29 rotates in conjunction with the movement of the carrier 14.

As shown in the first figure, a pair of light-shielding film guides 32, 32 are provided parallel to the carrier 14 and at an interval wider than the opposite sides of the opening 2d, and one end of the light-shielding film 34 is a winding pipe. 27° 27, and the other end is fixed to the carrier 14 via an angle 33.

The light shielding film 34 is wound around the winding pipe 27, 27 a predetermined number of times in consideration of the movement range of the carrier 14. In the attached state, the coil spring 31 applies a counterclockwise rotational force to the winding vibrator 27 on the left side in FIG. 2, and a clockwise rotational force to the right side winding vibrator 27 in FIG. The light shielding film 34 functions to shield the photosensitive film 9C from light except for the projection portion of the rod lens array 15. Note that when the carrier 14 is in a standby state located at the left end or right end in FIG. 1, the projection part of the rod lens array 15 is out of the opening 2d, and the entire surface of the photosensitive film 9C is shielded from light by the light shielding film 34.

Next, the operation will be explained.

First, place this device on the original image 1.

Then, turn on the power switch (not shown) of this device.

Then, the fluorescent tube 24 lights up and illuminates the lower part of the rod lens array 15. Further, when a start switch (not shown) is pressed, the drive motor 23 starts, and the gear train 22. Belt wheel 21. Carrier 14 via timing belt 19
For example, the vehicle moves toward the right from the left end standby position.

Then, as career 14 progresses, the original screen 1 will be displayed one after another.
The reflected light enters the rod lens array 15 and forms an image on the photosensitive film 9C, forming a latent image. As the carrier 14 moves rightward, the left winding vibrator 27
The light-shielding film 34 is pulled out from the window, and the light-shielding film 34 is wound around the winding vibrator 27 on the right side.
Due to the action of the coil spring 31, the light shielding film 34 maintains the light shielding state with appropriate tension without loosening. As the carrier 14 moves to the right, the right shaft 28
rotates clockwise, the number of windings of the right coil spring 31 decreases, and the tension on the light-shielding film 34 is prevented from weakening by rotating the shaft 29 clockwise together with the belt pulley 21. Appropriate tension can always be applied to the light shielding film 34. Note that even when the carrier 14 moves to the left, an appropriate tension can always be applied to the light-shielding film 34 by the left shaft 29 for the same reason.

Therefore, it is possible to prevent the light-shielding film from being deflected or applying excessive tensile force during copying, to ensure complete light-shielding and to prevent damage to the light-shielding film. When the carrier 14 reaches the right end position and a latent image is formed on the entire surface of the photosensitive film 9C, the limit switch is activated, the carrier 14 is stopped, and the - operation is completed.

After that, pull the instant film drawer tongue 9a to apply the developer 9d to the printing film 9b and the photosensitive film 9C.
It is applied between the two to bring them into close contact, and development is completed in about 1 degree, for example.

Next, when copying another item, press the start switch again, and the carrier 14 advances from the right end position until it reaches the left end position and copies are made.

Another embodiment of the present invention will be described below with reference to FIG.

The difference from the first embodiment is as follows.

That is, the tension applying means 126 contacts the inner surface of the light shielding film 134 while the movable shaft 1 is slidable in the moving direction of the optical means (not shown) or the carrier (not shown).
26a, and a biasing spring 126b that biases the movable shaft 126a outward.

The movable shaft 126a is connected to the groove 10 bored in the case 102.
2a is fitted. In addition, the biasing spring 126b is
It is set in 02.

Additionally, a shaft (not shown) is fixed to the belt pulley 121.

) is fixed to a winding pipe (not shown), and no coil spring is provided inside the winding pipe.

Next, the action and effect will be explained. Belt wheel 121
Due to the rotation of the timing belt 119, a carrier (not shown) moves, for example, to the right from the left end standby position.

At this time, the winding pipes on both sides that are integral with the belt pulley 121 rotate clockwise together with the belt pulley.

The rightward movement of the carrier and the rotation of the left winding pipe pull out the light shielding film 134 from the left winding pipe. Further, as the right winding pipe rotates, the light shielding film 134 is wound around the right winding pipe. As the carrier moves, the number of turns of the light-shielding film 134 on the left and right winding pipes changes successively. As a result, the light shielding film 134 is wound around the left and right winding pipes.
The circumferential speed of the carrier changes sequentially, creating a speed difference between the carrier and the carrier, which moves at a constant speed. For this reason, the light shielding film 134 may sag, but the light shielding film 134
The case 102 is urged outward by a biasing spring b via a. Therefore, the above-mentioned sag is eliminated and light can be completely blocked. Note that the same applies when the carrier moves to the left.

The configuration and operation of the device other than those described above are the same as in the first embodiment.

Note that in the first embodiment, the extension rod 30 is attached to the case 2.
It may also be a bearing fixed to the That is, the shaft 29 is fixed to one end of this bearing 30, and the shaft 29 is fixed to the case 2.

The belt pulley 21 is rotatably attached to the other end of the bearing 30. Thereby, the belt pulley 21 is rotatably supported by the bearing portion 25 and the bearing 30.

In this case, when the carrier 14 is close to the winding pipe 27, the coil spring 31 is wound an extra predetermined number of times. As a result, even when the carrier 14 approaches the winding pipe 27 and the light shielding film 34 is wound around the winding pipe 27, and the number of windings of the coil spring 31 decreases, the coil spring 31 is wound a predetermined number of times. Therefore, there is sufficient tension on the light shielding film 34. Therefore, an appropriate tension can always be applied to the light-shielding film 34.

Further, in the above embodiments, a peelable type instant photographic photosensitive material was used, but a monosheet type type can also be used.

Further, in the above embodiments, for example, in the first embodiment, the light shielding film 34 was used to shield the opening 2d of the case 2 from light, but a bellows or the like may be used as the light shielding film, and in the above embodiments, For example, in the first embodiment, the transparent plate 3 is fixed to the window hole 2b of the bottom plate 2a of the case 2, but the window hole 2b
The timing belt 19 may be left open, or a wire may be used in place of the timing belt 19. In addition, various changes can be made to this embodiment without departing from the technical idea of the present invention. be.

(Effects) According to the present invention, an appropriate tension is always applied to the light-shielding film by the tension applying means.

Therefore, it is possible to prevent the light-shielding film from bending or applying excessive tensile force during copying, and to ensure reliable light-shielding.
Furthermore, damage to the light shielding film can be prevented.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a partially sectional front view, FIG. 2 is a partially cutaway plan view of the case, and FIG. 3 is a partially cutaway plan view of the case. Fig. 1 A-A cross-sectional view, No. 4
The figure is a partial sectional view showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Original picture, 9... Instant photographic photosensitive material, 9b... Print surface, 9C... Photosensitive surface, 14... Carrier, 15... Optical means, 23... Driving means, 24 ... Light source, 26.126 ... Tension applying means, 27 ... Winding drum, 29 ... Member, 31 ... Biasing spring (coil spring), 34.13
4... Light shielding film, 126a... Movable shaft, 126b... Biasing spring. 126 134”・Pakashi Kabagame

Claims (5)

[Claims] (1) an instant photographic photosensitive material having a photosensitive surface and a printing surface that forms a visible image as an inverted image of the image formed on the photosensitive surface, the photosensitive surface facing parallel to the original; an optical means located between the original image and the photosensitive surface, for forming an image of a narrow area of the original image on the photosensitive surface as an erect real image; and a driving means for moving the optical means parallel to the original image. , comprising: a light source that illuminates the original image; a flexible light-shielding film that is fixed to the optical means or its carrier with the optical means exposed; and tension-applying means that applies tension to the light-shielding film. An instant photocopying device characterized by: (2) In claim 1, the tension applying means is rotatably arranged outside the movement range of the optical means or the carrier, and is wound with the outer end of the light shielding film fixed to the outer peripheral surface. and a biasing spring provided in the winding drum and applying a spring force to the winding drum in the direction of winding the light shielding film. An instant photocopying device with special features. (3) In claim 2, the biasing spring is a coil spring, one end of which is fixed to one end of the winding drum, and the other end of which is a member into which the other end of the winding drum is rotatably fitted. An instant photocopying device, characterized in that the instant photocopying device is affixed to. (4) An instant photographic copying apparatus according to claim 3, wherein said member rotates in conjunction with movement of said optical means or said carrier. (5) In claim 1, a pair of winding drums are rotatably provided outside the range of movement of the optical means or the carrier for winding the outer end of the light shielding film while fixing it to the outer peripheral surface. , the tension applying means includes a movable shaft that abuts the inner surface of the light shielding film and is slidable in the moving direction of the optical means or the carrier, and a biasing spring that biases the movable shaft outward. An instant photocopying device comprising: