JPS63114089A - Method of forming roller heater - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application) The present invention relates to a roller heater used for fixing, for example, a PPC copying machine.

[Prior Art] A conventional roller heater of this type is formed as shown in FIG. 2, in which a roller 11 with a hollow portion 11a is formed using a metal member such as aluminum, which has good thermal conductivity. Then, a halogen lamp 12 in which filament and halogen gas are sealed is inserted into a glass (quartz) duplex formed separately into the hollow part 11a, and by lighting the halogen lamp 2, the above-mentioned light is emitted by radiant heat. The metal roller 11 is heated to produce a heater effect, and a temperature detection device is usually installed, and the power is turned on and off based on this signal to maintain a constant temperature.

Problems to be Solved by Invention KI However, since this conventional roller heater inserts the halogen lamp 12 into the hollow part 11a as explained above, there is a WA gap between both parts, and the thermal conductivity is low. Unfortunately, it takes time for the roller heater to reach the specified temperature,
For this reason, a problem arises in that the PPC copying machine cannot be made ready for use immediately upon startup.

Means for Solving the Problems 1 The present invention is a specific means for solving the above-mentioned problems of the conventional method, and provides a roller heater in which a halogen lamp is provided inside the metal roller as a heating element. provides a method for forming a roller heater, which is an airtight container with filament and halogen gas sealed inside, and uses the metal roller itself as a heating element, thereby improving heat conduction. This solves the problems of the conventional technology.

K Embodiment Next, the present invention will be described in detail based on an embodiment shown in the drawings.

The reference numeral 1 in FIG. 1 is a metal roller made of aluminum or the like having good thermal conductivity, as in the conventional example, and the metal roller 1 is provided with a hollow portion 10. It has a smaller diameter than the conventional example, and the inner wall surface is subjected to alumite treatment, etc., and corrosion resistance is also increased to prevent the metal roller 1 from being corroded by halogen gas. Further, the hollow portion 1a
Electrodes 3 are fixed to both ends of the housing via an insulating material 2 to form an airtight container, and a filament 4 is connected between the electrodes 3. Halogen gas is filled in the hollow portion 1a thus formed, and the metal roller 1 itself has the same heating element configuration as a halogen lamp, thereby forming the intended roller heater.

At this time, if this roller heater is used for fixing an RPC copying machine, the filament 4 has a temperature of at least 180°C to 20°C on the outer surface of the metal roller 1.
The power consumption is set so that the temperature reaches 0°C, and in order to shorten the preheating time, the power consumption is set higher than necessary, and a temperature detection device such as a thermister is installed on the metal roller 1, and It is possible to take measures to maintain a constant temperature, such as turning the power on and off to maintain the temperature, just as in the conventional example.

[K effect] In this way, by making the metal roller 1 itself have the same structure as a halogen lamp, the conventional lamp can pass through the glass tube, and furthermore, the gap, that is, the air layer that occurs between the glass tube and the metal roller, can be eliminated. By eliminating the gap between the filament 4 and the glass tube, the heat generated by the filament 4 is conducted directly to the metal roller 1, which improves the conduction efficiency. It increases the

[Effects of the Invention] As explained above, according to the present invention, the metal roller is made into an airtight container and the filament and halogen gas are sealed inside, and the metal roller itself is used as a heating element, so that the heat generated by the filament is is conducted directly to the metal roller, and if the filament has the same power consumption,
It enables the temperature of the metal roller to rise more quickly, shortens the preheating time from when the power is turned on to when the RPC copier is ready for use, and has an excellent effect on improving practicality. The Qin Dynasty.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a method for forming a roller heater according to the present invention, and FIG. 2 is a perspective view showing a conventional example. 1... Metal roller 1a... Hollow part 2... Insulating material 3... Electrode 4
・・・・・・Hilament

Claims (1)

[Claims] A roller heater that uses a halogen lamp as a heating element inside a metal roller, characterized in that the metal roller is an airtight container with filament and halogen gas sealed inside, and the metal roller itself serves as the heating element. How to form a roller heater.