JPH09179204A - Diazo copying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the contact of a diazo sensitized paper with carrying rollers, to surely exert the frictional force of the carrying rollers and to surely carry the diazo sensitized paper supplied between a carrying plate and the carrying rollers to a thermal developing device by forming projected lines extended in a carrying direction, on the surface of the carrying plate, between the adjacent carrying rollers. SOLUTION: Plural disk-like carrying rollers 7 are attached to a rotary shaft 79. A gap through which the diazo sensitized paper passes is provided between the carrying rollers 7 and the carrying plate 5, but the projected lines 5 in the carrying direction are formed on the carrying plate 5, between the carrying rollers 7. Thus, the diazo sensitized paper is pushed up by the projected lines 51, to be deformed. Even if paper thickness is small or the gap between the carrying rollers 7 and the carrying plate 5 is wider than a set value, the diazo sensitized paper comes into contact with the carrying rollers 7. Therefore, the frictional force of the carrying rollers 7 exerts on the diazo sensitized paper, to surely carry it.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diazo copying machine which heat-develops a diazo photosensitive paper exposed in an exposing step in a heating step.

[0002]

2. Description of the Related Art A diazo copying machine forms an image by utilizing the photosensitivity and coupling reactivity of a diazonium salt, and a single-color copy with high positive contrast can be directly produced by two steps of exposure and heat development. Although it can be obtained, it has advantages of low copy cost and easy handling.

In the exposure process in a diazo copying machine, the original drawing and the diazo photosensitive paper coated with the diazo sensitive material are superposed and contact transmission exposure is carried out with the original drawing as the light source side. A transparent glass cylinder is used in which one or several tube-shaped light source lamps that emit a certain degree of near-ultraviolet light are arranged. The cylinder is held by a plurality of axially divided cloth backup belts, and the cylinder rotates as the backup belt moves. Then, when the original image and the diazo photosensitive paper are superposed and the original image is placed on the cylinder side between the cylinder and the backup belt, the diazo photosensitive paper moves while being in close contact with the original image, and is exposed by the light transmitted through the original image.

The exposed diazo photosensitive paper is heat-developed separately from the original image, and in order to thermally develop the diazo photosensitive paper, a heating device of a hot roll type is mainly adopted. A heating device of a heat roll type has a plurality of backup rolls for pressing the diazo photosensitive paper against the heat roll for heating the diazo photosensitive paper, and further, a heat roll between the backup rolls. The diazo photosensitive paper supplied between the heat roll and the backup roll is heat-treated while moving in a pressure-bonded state to the heat roll.

Here, the exposed diazo photosensitive paper and the original drawing are often separated automatically by an automatic separating mechanism. The automatic separating mechanism rotates while making contact with each other at different peripheral speeds, and a pair of shift rolls that cause the leading edge of the diazo photosensitive paper supplied between them to precede the leading edge of the original drawing, holding the leading edge of the diazo photosensitive paper. The separation rotary plate, the diazo photosensitive paper released from the separation rotary plate are brought into contact with the transport plate, rotated, and transported to the heating step. That is,
The diazo photosensitive paper whose leading edge is preceded by a pair of shift rolls is separated from the original by the separation rotary plate and supplied between the transport plate and the transport roll, and is transported to the heating process. Is discharged to the outside of the copying machine without being supplied to the copying machine. To the one disclosing such an automatic separating mechanism,
For example, there is Japanese Patent Publication No. 43-4145.

[0006]

As described above, in the diazo copying machine provided with the automatic separating mechanism, only the diazo photosensitive paper is supplied between the conveying plate and the conveying roll arranged on the downstream side of the automatic separating mechanism. However, a plurality of carrier rolls are attached to the rotary shaft, and the carrier rolls are provided with a small gap without coming into contact with the carrier plate. This is because, when the transport roll is brought into contact with the transport plate, the transport plate vibrates and resonates due to the rotation of the transport roll, causing a large noise.

Then, the diazo photosensitive paper enters the gap between the carrying roll and the carrying plate and is carried by the frictional force of the rotating carrying roll, but if the gap between the carrying roll and the carrying plate is larger than the paper thickness of the diazo photosensitive paper. However, there is a problem that the frictional force of the transport roll does not act on the diazo photosensitive paper and the transport becomes impossible. In particular, in the case of diazo photosensitive paper having a small size, since the number of transporting rolls contacting it is small, it is often impossible to carry it. Therefore, if the gap between the transport roll and the transport plate is made small enough to accommodate any paper thickness of the diazo photosensitive paper, it can be transported, but due to the dimensional accuracy, there is a limit to reducing this gap, making it impossible to transport. There is a problem that occurs.

For this reason, conventionally, a hole is formed in the conveying plate at a position facing the conveying roll, and the leading end of the conveying roll is slightly exposed in this hole, so that the diazo photosensitive paper is at the leading end of the conveying roll. It is carried out while being pushed into the hole of the carrier plate. However, this method tends to increase the cost because it is necessary to change the roll diameter of the transport roll when the transport force is made different between the center and the end of the transport plate.

Therefore, the present invention provides a diazo copying machine which has a simple structure and can reliably convey the diazo photosensitive paper, which is automatically separated from the original drawing and supplied between the conveying plate and the conveying roll, to the heat developing device. The purpose is to provide.

[0010]

In order to achieve the above object, the present invention is to separate the diazo photosensitive paper and the original drawing by an automatic separating mechanism after the diazo photosensitive paper and the original drawing are overlapped and exposed in an exposure step. In the diazo copying machine, in which the original image is discharged to the outside of the copying machine, and the diazo photosensitive paper is passed between a plurality of conveying rolls attached to the rotary shaft and the conveying plate to carry out heat development, and the surface of the conveying plate is developed. A ridge extending in the transport direction is formed at a position between adjacent transport rollers.

[0011]

Function: That is, between the adjacent transport rollers,
Since a ridge extending in the transport direction is formed on the surface of the transport plate,
The diazo photosensitive paper pushed up by the ridges easily comes into contact with the conveying roller, and the frictional force of the conveying roller surely acts on the diazo photosensitive paper. Therefore, the diazo photosensitive paper supplied between the transport plate and the transport roll can be reliably transported to the heat developing device.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. FIG. 1 shows a heat-developing diazo copying machine with an automatic separating mechanism. In FIG. 1, a casing 1 injection-molded with a synthetic resin has an inverted upper part with two peaks 11 and 12 arranged side by side. W-shaped, 11
An exposure device A and an automatic separating mechanism C are housed inside, and a heat developing device B is housed inside the rear mountain 12.

On the front slope of the front mountain 11, an exposure inlet 13 for superimposing a diazo photosensitive paper coated with a diazo photosensitive material and an original image and supplying the original image to the exposure device A, and an original image which is automatically separated after the exposure are discharged. An original drawing outlet 14 is provided, and further, a developing outlet 15 for discharging the diazo photosensitive paper on which the thermal development has been completed is provided on the rear slope of the rear mountain 12. In addition, there is provided an exposure outlet 16 for discharging the exposed diazo photosensitive paper and the original image when the manual separation is switched, and a developing inlet 17 for inserting the manually separated diazo photosensitive paper. Further, inside the casing 1, a drive motor (not shown) and electric components constituting various control units are accommodated.

In the exposure apparatus A, a cylinder 21 made of transparent hard glass is rotatably arranged, and the inside thereof has a rating of 105 W along the axis and a wavelength of 420 nm.
Two tube-shaped fluorescent lamps 22 that strongly radiate the above light are arranged. An endless backup belt 25 is wound around the three idle rolls 23, one drive roll 24, and the cylinder 21, and the backup belt 25 holds the cylinder 21. When the drive roll 24 is driven and rotated by a motor (not shown), the cylinder 21 rotates in the direction of the arrow together with the backup belt 25.

In the heat developing device B, a heat roller 31 is rotatably arranged. The heat roller 31 is formed by alumite-treating the surface of an aluminum pipe, and a heater lamp 32 composed of a tube-type halogen bulb having a rated power consumption of 1.2 kW is disposed along the axis thereof. Three backup rollers 3 are provided around the heat roller 31.
3 is rotatably arranged. Backup roller 3
The surface of 3 is made of silicon sponge and is highly elastic, but each backup roller 33 is in pressure contact with the heat roller 31. A drive chain (not shown) is wound around the three backup rollers 33. When the motor rotates, the heat roller 31 and the backup roller 33 rotate in the direction of the arrow. Also,
The guide member 3 is provided between the backup rollers 33 and 33.
4 are arranged.

The automatic separating mechanism C is provided with a pair of shift rolls 41, 42, a separating rotary plate 43 having a recess 431, and a bell crank-like engaging / disengaging member 44. And
On the downstream side of the separation rotary plate 43, the transport plate 5, the paper shield plate 6, and the transport roll 7 are arranged.

The pair of shift rolls 41, 42 are rotating in contact with each other at different peripheral velocities, and the original sheet is displaced from the original sheet of the diazo photosensitive paper supplied therebetween, so that the leading edge of the diazo photosensitive sheet precedes the leading edge of the original sheet. It is designed to let you. Although one end of the engagement / disengagement member 44 is locked to the separation rotary plate 43, the separation rotary plate 43 is stopped. When the separation rotary plate 43 is stopped, the recess 431 of the separation rotary plate 43 causes the transport plate 5 to move. Is coming from. When the front end of the diazo photosensitive paper enters the recess 431, the front end of the diazo photosensitive paper pushes up and rotates the engaging / disengaging member 44, so that the engagement / disengagement member 44 and the separating rotary plate 43 are disengaged from each other to separate and rotate. The plate 43 is adapted to rotate while holding the front end of the diazo photosensitive paper. On the other hand, since the leading end of the original drawing is not held by the separation rotary plate 43, the diazo photosensitive paper and the original drawing are automatically separated at this point, and the original drawing is discharged from the original drawing outlet 14. When the separation rotary plate 43 further rotates, the front end of the diazo photosensitive paper is released from the separation rotary plate 43, and the diazo photosensitive paper passes through the gap between the front end of the transport plate 5 and the front end of the paper shield plate 6 and the transport roller 7 and the subsequent stage. The two-conveying rollers 71 convey the heat developing device B.

Here, the conveying roller 7 does not consist of one long roller, but as shown in FIG. 2, a plurality of disc-shaped conveying rollers 7 are attached to the rotary shaft 79.
Further, a gap through which the diazo photosensitive paper passes is provided between the carrying roller 7 and the carrying plate 5, but in the diazo copying machine of the present invention, the adjacent carrying roller 7 and the carrying roller 7 are provided.
In between, a ridge 51 in the carrying direction is formed on the carrying plate 5. The gap between the transport roller 7 and the transport plate 5 is 0.
It is 4 mm, and the height of the protrusion 51 is 0.5 mm.

The conveying force of the diazo photosensitive paper is strong in the central portion of the conveying plate so that it can be corrected when the diazo photosensitive paper is obliquely fed (the axis of the diazo photosensitive paper has an angle with the conveying direction). Although it is set weakly at the end portion, for this reason, as shown in FIG. 2, the ridges 51 are provided close to the central transport roller 7 and apart from the end transport roller 7. Good.

When the power switch (not shown) is
N, the warm-up time has passed and the heater lamp 32
When the heat roller 31 heated by the heating is heated to a predetermined temperature and copying is possible, a message of copying OK is displayed. Then, when the original sheet and the diazo photosensitive paper coated with the diazo photosensitive material are overlaid and inserted from the exposure inlet 13, the backup belt 25 presses the cylinder 21 to move it, and in this process, the fluorescent lamp 2 that has passed through the cylinder 21 is transferred.
The light 2 passes through the original drawing to expose the diazo photosensitive paper, but the rotation speed of the cylinder 21 is changed according to the quality of the original drawing.

The exposed diazo photosensitive paper and the original image are supplied to the pair of shift rollers 41 and 42, but as described above, since the pair of shift rolls 41 and 42 are in contact with each other and rotate at different peripheral speeds. , The original sheet is dislocated from the diazo photosensitive paper supplied in the meantime, and the leading edge of the diazo photosensitive paper precedes the leading edge of the original sheet. Then, the diazo photosensitive paper and the original image are separated by the separation rotary plate 43, and the diazo photosensitive paper is supplied between the transport plate 5 and the transport roller 7 through the gap between the transport plate 5 and the paper shield plate 6.

At this time, since the protrusions 51 in the conveyance direction are formed on the conveyance plate 5 between the adjacent conveyance rollers 7, the diazo photosensitive paper is pushed up by the protrusions 51 to be deformed. Even if the diazo photosensitive paper is thin or the gap between the conveying roller 7 and the conveying plate 5 is wider than the set value, the diazo photosensitive paper contacts the conveying roller 7. Therefore, the frictional force of the rotating conveying roller 7 acts on the diazo photosensitive paper, and the diazo photosensitive paper can be surely conveyed.

When the diazo photosensitive paper conveyed by the conveying roller 7 is further conveyed by the second conveying roller 71 in the subsequent stage and reaches between the backup roller 33 and the heat roller 31, the diazo photosensitive paper is heated by the backup roller 33 by the heat roller 31. Is pressed and heat-developed. Then, the heat-developed diazo photosensitive paper is discharged from the developing outlet 15 to complete copying.

[0024]

As described above, according to the present invention, in the diazo copying machine in which the diazo photosensitive paper, which is automatically separated from the original drawing, is conveyed to the heat developing device after passing between the conveying plate and the conveying roll. Since a ridge extending in the conveying direction is formed on the surface of the sheet between the adjacent conveying rollers, the diazo copying machine can surely convey the diazo photosensitive paper to the heat developing device.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a diazo copying machine.

FIG. 2 is an explanatory diagram of a main part of the embodiment of the present invention.

[Explanation of symbols]

 1 Casing 13 Exposure Inlet 14 Original Image Outlet 15 Development Outlet 21 Cylinder 22 Fluorescent Lamp 25 Backup Belt 31 Heat Roller 32 Heater Lamp 33 Backup Roller 41, 42 Shifting Roller 43 Separation Rotating Plate 44 Disengaging Member 5 Conveying Plate 51 Projection 6 Blocking Paper board 7 Transport roller 79 Rotation axis of transport roller A Exposure device B Thermal development device C Automatic separation mechanism

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeo Kijima 262 Kondo, Tatebayashi, Gunma Gunma Ushio Electric Co., Ltd. 72) Inventor Akio Miyamoto, 200, Onakasato, Fujinomiya, Shizuoka, Fuji Photo Film Co., Ltd. (72) Inventor, Kazuaki Kaneshiro, 200, Onakasato, Fujinomiya, Shizuoka, Fuji Photo Film Co., Ltd.

Claims (1)

[Claims] 1. The diazo photosensitive paper and the original drawing are overlapped and exposed in an exposure process, and then the diazo photosensitive paper and the original drawing are separated by an automatic separating mechanism, and the original drawing is discharged to the outside of the copying machine and attached to a rotary shaft. In a diazo copying machine in which a diazo photosensitive paper is passed between a plurality of transport rolls and a transport plate and transported in a heating step to perform thermal development, a ridge extending in the transport direction is formed on the surface of the transport plate between adjacent transport rollers. A diazo copying machine characterized by being formed at a position.