JPH06295784A - Roll device - Google Patents

Abstract

PURPOSE:To provide a roll device having the capability to solve vibration and noise problems. CONSTITUTION:A center shaft 3 is laid in the roll section 1a of a hollow roll 1. Heating lamps 9 are fixed to the external surface of the shaft 3 for applying heat thereto from space within the roll section 1a of the roll 1. According to this construction, vibration and noise problems regarding a roll device can be eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll device which heats a roll and heats the roll by passing, for example, paper, film or the like, and more particularly to improvement of a roll heating structure.

[0002]

2. Description of the Related Art FIG. 5 is a sectional view showing a structure of a conventional roll device disclosed in, for example, Japanese Patent Publication No. 46-40139.

In the drawing, reference numeral 1 is a hollow roll, for example, a roll portion 1a through which a paper, a film or the like as a member to be heated is transferred across the surface, and a through hole 1c is provided at both ends of the roll portion 1a so as to project. The shaft end portion 1b has the shaft end portion 1b, and the shaft end portion 1b is rotatably supported by a bearing device (not shown). Reference numeral 2 is a hollow portion formed by the inner surface of the roll portion 1a and the side surface of the shaft end portion 1b, 3 is a central axis that penetrates the hollow portion 2 at a predetermined distance from the through hole 1c, and one end is an external base. 4 is fixedly supported.

Reference numeral 5 denotes a bearing fitted between the other end of the central shaft 3 and one shaft end portion 1b, and 6 denotes an iron core fixed around the central shaft 3 in the hollow portion 2 at the end portion. A brim portion 6 that projects in the radial direction and extends near the inner surface of the roll portion 1a of the hollow roll 1.
a. Reference numeral 7 denotes an electromagnetic coil wound around the center shaft 3 via an iron core 6, and a space between it and the iron core 6 is filled with a heat-resistant insulator (not shown) and fixed to the iron core 6. Reference numeral 8 denotes a heat pipe arranged in the roll portion 1a of the hollow roll 1 in parallel with the axial direction and in the circumferential direction.

Next, the operation of the conventional roll device configured as described above will be described. First, when the electromagnetic coil 7 is excited by a single-phase AC power source (not shown), the magnetic flux φ induced by this is indicated by the dotted line in the figure, the iron core 6, one brim portion 6a, and the roll portion of the hollow roll 1. 1a,
A closed magnetic circuit is formed by flowing in the order of the other brim portion 6a, and an eddy current flows in the inner peripheral portion of the roll portion 1a of the hollow roll 1, and the hollow roll 1 generates heat due to this eddy current. Therefore, if, for example, paper, a film or the like is transferred to the surface of the hollow roll 1, these heated members are heated by this heat and the intended purpose is achieved. In addition, the heat pipe 8 serves to equalize the temperature of the roll portion 1a of the hollow roll 1.

[0006]

Since the conventional roll device is constructed as described above, the electromagnetic coil 7 is replaced by the iron core 6
The space between the electromagnetic coil 7 and the iron core 6 is filled with a heat-resistant insulating material so as to be fixed to the periphery of the electromagnetic coil 7, and the electromagnetic coil 7 is heated by its own heat generation and radiant heat from the inner peripheral surface of the hollow roll 1. Even though the temperature rises to a high temperature, heat radiation and cooling can be performed only from the outer peripheral surface side, so that the insulation life is shortened and it is necessary to replace the electromagnetic coil 7 in common. Further, there is a problem that a magnetic attraction force acts between the roll portion 1a and the electromagnetic coil 7 due to the electromagnetic force, which causes vibration and noise.

The present invention has been made to solve the above problems, and provides a roll device capable of solving the problems of insulation life, vibration, and noise because heating is performed without using an electromagnetic coil. To aim.

[0008]

In the roll device according to the present invention, heating lamps are arranged in the hollow space of the roll portion 1a and heated by radiant heat.

[0009]

Since the roll device according to the present invention heats by the radiant heat of the heating lamp, the conventional problems of insulation life, vibration and noise are solved.

[0010]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. 1 is a sectional view showing the structure of a roll device according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. In these figures, 1 is a hollow roll, 1a is a roll portion, 1b is a shaft end portion, 1c is a through hole, 2
Is a hollow part, 3 is a central shaft 4, is a base, 5 is a bearing, and 8 is a heat pipe, and is the same as the mechanism of the above-described conventional device. Reference numeral 9 is a heating lamp that is fixed around the central shaft 3 and heats the roll portion 1a of the hollow roll 1 from the inside. As an example, the figure shows four heating lamps arranged in the circumferential direction and two sets arranged in the axial direction. It shows the case.

Next, the operation of the roll device according to the first embodiment of the present invention configured as described above will be described. When the heating lamp 9 is connected to a power source (not shown), light is generated and this light is heated by the roll portion 1a of the hollow roll 1 as radiant heat. The heated roll portion 1 a is soaked by the heat pipe 8. As described above, since the heating lamp 9 is used to heat the roll portion 1a of the hollow roll 1 from the inside, the insulation life of the electromagnetic coil 7 as in the above-described conventional device or vibration, noise, etc. associated with electromagnetic force is generated. There is an effect that does not.

Example 2. In addition, although the heating lamp 9 is provided around the central axis 3 and the heating is performed from the inside of the roll device in the above embodiment, as shown in FIGS. 3 and 4, the roll portion 1a of the hollow roll 1 is A heating lamp 10 may be provided near the outside to heat the roll portion 1a from the outside. In this case, there is an effect peculiar to the second embodiment that the structure inside the hollow roll is simplified.

Embodiment 3. In the above-described Example 1, the heating lamp 9 is arranged in the roll portion 1a of the hollow roll 1, and
Describes the case where the heating lamp 10 is arranged in the vicinity of the outer peripheral portion of the roll portion 1a of the hollow roll 1. However, by using the structure of the first embodiment or the structure of the second embodiment depending on the capacity of the roll device, It can be applied to any diameter from small to small.

[0014]

As described above, according to the present invention, the heating source of the roll device is changed from the conventional electromagnetic coil to the heating lamp, so that the structure of the heating source can be simplified. Further, by disposing the heating lamp near the outer peripheral portion of the hollow roll, the structure inside the hollow roll can be further simplified.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of a roll device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1 in Embodiment 1 of the present invention.

FIG. 3 is a sectional view showing a configuration of a roll device according to a second embodiment of the present invention.

FIG. 4 is a sectional view taken along the line BB of FIG. 3 in Embodiment 2 of the present invention.

FIG. 5 is a cross-sectional view showing a configuration of a conventional roll device.

[Explanation of symbols]

 1 Hollow Roll 1a Roll Part 1b Shaft End 1c Through Hole 2 Hollow Part 3 Center Axis 9 Heating Lamp 10 Heating Lamp

Claims (2)

[Claims] 1. A hollow roll which is rotatably supported at an end of a shaft and has a hollow portion formed at both ends of the roll portion with through holes, and a hollow roll which penetrates the hollow portion at a predetermined distance from the through hole. A roll device comprising: a central shaft; and a heating lamp that is fixed around the central shaft and heats the hollow roll from the inside. 2. A hollow roll which is rotatably supported at an end of a shaft and has a hollow portion at both ends of which is opened at a penetration source, and a hollow roll which penetrates the hollow portion at a predetermined distance from the through hole. A roll device, comprising: a central shaft; and a heating lamp that is disposed near the outer peripheral portion of the hollow roll and that heats the roll from the outside.