JPH0753076Y2 - Roller heat treatment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a roller heat treatment apparatus used for heat treatment such as heat development and heat fixation of a curable sheet such as paper or film. It is about.

[Prior art and its problems]

A roller heat treatment device for performing heat treatment such as heat development and heat fixing on a sheet to be processed is a pair of a heat roller for heating the sheet to be processed and a backup roller for pressing the sheet to be processed on the heat roller. It has a roller. Then, the sheet to be treated is supplied between the rotating rollers and is heat-treated while moving in a pressure-bonded state to the heat roller. This backup roller is made of a material with a high elasticity, such as silicon rubber, so that the sheet to be processed can be pressed securely, and it is also called a soft roller.On the other hand, the heat roller does not conduct heat. In order to improve the quality, many aluminum pipes are coated with Teflon or the like, which is also called a hard roller, in which a tubular heater lamp such as a halogen bulb is arranged along the axial direction. In such a roller heat treatment apparatus, it is necessary to heat the sheet to be treated at a uniform temperature for a predetermined time. That is, it is necessary that the temperature distribution of the heat roller in the axial direction is uniform and that the sheet to be processed is pressed onto the heat roller for a predetermined time.

When the required heating time is relatively short, such as in PPC and laser printers, where the required heating time is relatively short, a predetermined heating time can be secured simply by heating between a pair of rollers. When performing a heat treatment that requires a relatively long heating time, such as in the case of developing paper, it is necessary to slow down the rotation speed of the roller, which causes a problem that the developing time becomes long. In order to solve this problem, it has been proposed to arrange a plurality of backup rollers around the heat roller and provide a guide member between the backup rollers, which is slightly separated from the peripheral surface of the heat roller. (See, for example, Japanese Utility Model Laid-Open No. 1-172046) Such a guide member causes almost no problem when the sheet to be processed is paper and can be accurately developed, but the sheet to be processed is "second base paper". In the case of a film for making, it became clear that a defect occurs. For example, most of the film to be processed can be completely developed, but only the leading edge is incompletely developed, or, rarely, starting from an incompletely developed area at the leading edge, A streaky incomplete development area may occur.

To estimate this cause, in the conventional guide member, since the film does not sufficiently contact the heat roller between the backup rollers, only the leading edge is heated at the position of the backup roller and incomplete heating between the backup rollers. Since the central part and the part after that are brought into close contact with the heat roller by two or more backup rollers, these parts are completely developed and only the leading edge is incompletely developed. It seems

[Purpose of device]

Therefore, it is an object of the present invention to provide a roller heat treatment apparatus capable of completely developing over the entire film by eliminating the incompletely developed portion at the leading edge even when the film is used as the processing target sheet. .

[Constitution of the device and its action]

According to the configuration of the present invention, a curable sheet having a surface coated with a heat-sensitive material is supplied between a heat roller having a heater lamp and a backup roller that is in pressure contact with the heat roller, and heat-treated. In the discharged roller heat treatment apparatus, a plurality of the backup rollers are arranged, a guide member is provided along the circumferential surface of the heat roller between the backup rollers, and the guide member includes a pair of holding members, It consists of a bendable plastic plate passed between the holding members. One end side of the plastic plate is fixed to the upstream holding member and the other end side is non-fixed to the downstream holding member. The pair of holding members are arranged in the vicinity of the heat roller in such a positional relationship that they come into contact with each other and a predetermined area of the plastic plate comes into pressure contact with the heat roller. And butterflies.

That is, since the predetermined area of the plastic plate forming the guide member is in pressure contact with the heat roller, the film to be processed is in pressure contact with the heat roller over the predetermined width. Therefore, the incomplete heating is eliminated and the entire film can be completely developed.

〔Example〕

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

FIG. 1 shows a heat development type diazo copying machine. An exposure section A and a heat development section B are housed in a casing 1 having an inverted W-shaped upper surface, and the roller heat treatment apparatus of the present invention is applied to the heat development section B. The casing 1 has a supply port 11a for supplying the sheet to which the diazo heat-sensitive material is applied and the original drawing to the exposure section A, and a discharge port 12a for discharging after the exposure.
And a supply port 11b for supplying the exposed sheet to the thermal developing section B, and a discharge port 12b for discharging after the thermal development. In the exposure section A,
A transparent glass cylinder 101 is rotatably arranged inside the tube fluorescent lamp 10 with a rating of 100 W along the axis.
2 are arranged. And four idle rollers 103
An endless backup belt 105 is wound around one drive roller 104 and one cylinder 101, and the backup belt 105 holds the cylinder 101. Therefore, when the drive roller 104 is driven and rotated, the cylinder 101 rotates in the direction of the arrow.

Next, in the heat developing section B, the heat roller 2 is rotatably arranged. The heat roller 2 is made by coating the surface of an aluminum pipe with Teflon, and a heater lamp 21 made of a tubular halogen bulb with a rated power consumption of 1 KW is arranged along the axis of the aluminum pipe. Heat roller 2
Three backup rollers 3 are rotatably arranged around the. The backup roller 3 is made of silicon sponge and is highly elastic, and each is in pressure contact with the heat roller 2. Therefore, the contact portion is slightly deformed according to the curvature of the heat roller 2, and the contact area between the both is wide. Then, the endless drive chain 5 is wound around the sprocket 4 attached to one end of each shaft 31 of the backup roller 3, the idler 8 rotatably arranged, the drive roller 104 and the output shaft 61 of the motor 6. When the motor 6 rotates, the backup roller 3 is driven to rotate in the direction of the arrow. Therefore, the backup roller 3
With the rotation of the heat roller 2, the heat roller 2 is driven to rotate.
A temperature sensor 10 is in contact with the surface of the heat roller 2 so that the surface temperature of the heat roller 2 can be controlled within a predetermined range.

A guide member 9 is arranged between the backup rollers 3 along the circumferential surface of the heat roller 2. As shown in FIG. 2, the guide member 9 includes a pair of holding members 91, 92 each having a substantially L-shaped cross section, and a bendable plastic plate 93 provided between the holding members 91, 92. It is composed of. The plastic plate 93 is made of, for example, a polyester resin plate having a high heat resistant temperature. And one end side of the plastic plate 93
93a is fixed to the holding member 91 located on the upstream side of the flow of the sheet to be processed, and the other end side 93b is not fixed to the holding member 92 on the downstream side but is in contact with it. Here, the plastic plate 93 is in pressure contact with the heat roller 2 in the central area over a predetermined width. That is, the holding members 91, 92 are arranged in the vicinity of the heat roller 2 so that the straight line connecting the portions of the holding members 91, 92 with which the plastic plate 93 is fixed or in contact with each other has a positional relationship intersecting with the heat roller 2. Therefore, as a result, the plastic plate 93 is pressed against the heat roller 2 in the central area over a predetermined width. Therefore, in the process in which the sheet S to be processed passes through the backup roller 3a on the upstream side and enters the backup roller 3b on the downstream side, the sheet S to be processed is pressed against the heat roller 2 by a predetermined width in the traveling direction. There is.

Then, the power switch (not shown) is turned on to heat the heat roller 2 to a predetermined temperature, and when the fluorescent lamp 102 becomes stable, the copy switch (not shown) is turned on and the motor 6
To rotate. Then, the original sheet and the sheet to be treated, which is a film coated with the diazo heat-sensitive material, are overlapped with each other and the supply port 11a
When it is inserted from, the backup belt 105 presses the cylinder 101 and moves, but in this process it is exposed and discharged from the discharge port 12a.

Next, when the sheet to be processed is separated from the original drawing and supplied from the supply port 11b, the sheet is sequentially pressed against the heat roller 2 by the backup roller 3 and thermally developed while moving. Here, even when the leading edge of the sheet to be processed moves from the backup roller 3 to the adjacent backup roller 3, it is pressed against the hit roller 2 by the plastic plate 93 constituting the guide member 9, so that it is sufficiently heated. Therefore, the leading edge of the sheet to be processed is completely developed, and the sheet to be processed is guided to the scraper 7 and discharged from the discharge port 12b.

[Effect of device]

As described above, the roller heat treatment device of the present invention is
Since a guide member along the peripheral surface of the heat roller is provided between the backup rollers, and the plastic plate of the guide member and the heat roller are brought into pressure contact with each other, the sheet to be processed is used to create the "second base paper". Even a film can be completely developed.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is an explanatory view of a main part. 1 ... Casing, 11b ... Supply port, 12b ... Discharge port 2 ... Heat roller, 21 ... Heater lamp 3 ... Backup roller, 4 ... Sprocket 5 ... Drive chain, 6 ... Motor, 9 ... … Guide member 91, 92 …… Holding member, 93 …… Plastic plate A …… Exposure part, B …… Thermal development part

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yasue Yao 2-26-30, Nishiazabu, Minato-ku, Tokyo Inside Fuji Shashin Film Co., Ltd. (56) Reference JP-A-1-269938 (JP, A) JP Flat 1-306850 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A roller in which a curable sheet such as paper or film is supplied between a heat roller having a heater lamp inside and a backup roller in pressure contact with the heat roller, and is heated and discharged. In the heat treatment apparatus, a plurality of the backup rollers are arranged, a guide member is provided between the backup rollers along the circumferential surface of the heat roller, and the guide member includes a pair of holding members and a space between the holding members. And a bendable plastic plate, one end side of which is fixed to an upstream holding member, and the other end side of which is non-fixedly contacting a downstream holding member, The pair of holding members are arranged in the vicinity of the heat roller in such a positional relationship that a predetermined area of the plastic plate is pressed against the heat roller. Roller heat treatment apparatus.