JPH04209492A - Roll device - Google Patents

Abstract

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

Description

[Detailed description of the invention]

[00011

[Field of Industrial Application] The present invention relates to a roll device that heats, for example, cloth, paper, film, or the like by running it on an induction-heated roll. [0002] [0002] FIG. 8 and FIG.
9A and 9B are a sectional view and a sectional view taken along the line IX-IX in FIG. 8, respectively, showing a conventional roll device of this type disclosed in the 1991 publication. In the figure, 1 is a hollow roll that is heated by induction by an electromagnetic coil (not shown), and 2 is a plurality of holes drilled at predetermined intervals in the circumferential direction of the hollow roll 1, passing through the hollow roll 1 in the axial direction. It is being 3 is a heat pipe that is inserted into each person 2 and is filled with an evaporative working liquid such as chlorofluorocarbon, ammonia, water, etc.; 4 is a heat pipe that covers both ends of a hollow roll 1 so as to cover each person 2; A supporting shaft 5 is a bearing that rotatably supports the hollow roll 1 via the supporting shaft 4. [0003] In the conventional roll device configured as described above, when heating a material to be heated such as paper, cloth, or film by running it on the surface of the hollow roll l, the entire material to be heated is heated uniformly. It is necessary to uniformize the temperature of the surface of the hollow roll 1. For this purpose, it is generally known that a plurality of holes 2 are bored through the hollow roll 1 in the axial direction, and a heat pipe 3 is inserted into each hole 2, respectively. [0004] In order for the heat pipe 3 to exhibit heat uniformity, it is necessary that the outer circumferential surface of the heat pipe 3 and the inner circumferential surface of the hole 2 are in complete contact with each other. therefore,
First, the hollow roll 1 is filled with a gun drill, BTA (Bor), etc.
IngandTrepanning As5o cia
A hole 2 is drilled using a long hole drilling method such as tion), and a pipe of a slightly smaller diameter is inserted into this hole 2. [00051 Next, this pipe is expanded from the inside,
It is tightly fixed to the inner peripheral surface of hole 2. Thereafter, the heat pipe 3 is completed by filling the pipe with a predetermined amount of working fluid and sealing the end. By fixing the heat pipe 3 closely to each member 2 of the hollow roll 1 in this way, even if the hollow roll 1 receives uneven heating from inside, it can be quickly transferred from the high temperature part to the low temperature part of the hollow roll 1. Heat moves;
The hollow roll 1 is uniformly heated over its entire length. [0006]

[Problems to be Solved by the Invention] Since the conventional roll device is constructed as described above, it is possible to
However, even if you use the gun drill, BTA, or other excellent long hole drilling methods mentioned above, there is a limit to the length of the hole that can be machined. Since the hole 2 may be bent and exposed to the inner or outer peripheral surface of the hollow roll 1, it is necessary to increase the diameter of the hole 2 due to manufacturing constraints, which inevitably increases the internal volume of the heat pipe 3. do. When the internal volume increases in this way, the amount of working fluid also increases, and this is distributed unevenly within the heat pipe 3 over the entire length of the hollow roll 1, resulting in poor dynamic balance. Therefore, there is a problem in that the roll length is restricted and it is difficult to manufacture a long roll device. [0007] This invention was made to solve the above-mentioned problems, and an object thereof is to provide a long roll device. [0008]

[Means for Solving the Problems] A roll device according to the present invention has a plurality of holes axially bored at predetermined intervals in the circumferential direction of a hollow roll, and each hole has an evaporative action. A volume reducing member is inserted into the inside of each heat pipe, each of which is configured by enclosing a predetermined amount of liquid, to reduce the internal volume of the heat pipe. [00091

[Operation] The volume reducing member of the roll device of the present invention reduces the internal volume of the heat pipe, reduces the required amount of working fluid, and improves the dynamic balance of the hollow roll. [00101] [Example] An example of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the configuration of essential parts of a roll device in an embodiment of the present invention, and FIG. 2 is a line II--
It is a sectional view along II. In the figure, l is a hollow roll that is heated by induction by an electromagnetic coil (not shown), 6 is a plurality of holes bored in the axial direction at predetermined intervals in the circumferential direction of the hollow roll 1, and 7 is each of these six holes. Heat pipes 6 are fitted into heat pipes 7 and are filled with evaporative working fluids such as fluorocarbons, ammonia, water, etc. 8 are axially stretched across the center of each heat pipe 7 and fixed at both ends. It is a supported round bar-shaped volume reducing member. [00111 In the roll device according to the embodiment of the present invention configured as described above, if an imbalance occurs in the temperature distribution of the hollow roll 1 due to non-uniform heating, etc., the excellent thermal conductivity of the heat pipe 7 causes the hollow roll to Heat is rapidly transported from the high temperature side to the low temperature side of the roll 1, and as a result, the hollow roll 1 is uniformly heated along its entire length. [0012] Since the volume reducing member 8 is inserted into the heat pipe 7, even if the diameter of the heat pipe 7 increases, the internal volume of the heat pipe 7 does not substantially increase and is sealed inside. There is no need to increase the amount of working liquid, and since the working liquid is distributed in a well-balanced manner over the entire length of the heat pipe 7, the dynamic balance will not be lost. Therefore, since no problem occurs even if the diameter of the hole 6 is increased, the hole can be machined into a longer length, and the restriction on the roll length is expanded, making it easier to manufacture a long roll device. [0013] In the above embodiment, a rod-shaped volume reducing member 8 has been described, but hollow round pipe shapes as shown in FIG. 3, triangular rod shapes as shown in FIG. 4, and hollow square pipes as shown in FIG. Although the shape is not particularly limited, the volume reducing member 8 of the embodiment shown in FIGS. 4 and 5 divides the inside of the heat pipe 7 into three parts and four parts, respectively.
Since it is divided, the working liquid is divided and sealed in each divided part of the heat pipe 7, and the unevenness of the working liquid is also eliminated and the dynamic balance is further improved. [0014] In addition, in the case of a long roll, the volume reducing member 8 naturally becomes long, so some deflection occurs, but as shown in FIGS. 6 and 7, it is supported at appropriate intervals in the length direction. If the rod 9 is provided and supported, this deflection can be prevented. [0015] As described above, according to the present invention, a plurality of holes are bored in the axial direction at predetermined intervals in the circumferential direction of the hollow roll, and each hole has evaporability. A volume reducing member inserted to reduce the internal volume of the heat pipe is installed inside each heat pipe, which is constructed by enclosing a predetermined amount of working liquid. There is no need to increase the amount of enclosing, it is possible to prevent the dynamic balance from worsening, and it is possible to provide a long roll device.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the configuration of essential parts of a roll device in an embodiment of the present invention.

FIG. 2 is a diagram showing a cross section along line II-II in FIG. 1;

3 is a diagram showing a different modification of the volume reducing member in FIG. 1; FIG.

FIG. 4 is a diagram showing a second modification of the volume reducing member in FIG. 1;

FIG. 5 is a diagram showing a third modification of the volume reducing member in FIG. 1;

FIG. 6 is a cross-sectional view showing the configuration of essential parts of a roll device in another embodiment of the present invention.

FIG. 7 is a diagram showing a cross section along line VII-VII in FIG. 6;

FIG. 8 is a sectional view showing the configuration of a conventional roll device.

9 is a diagram showing a cross section taken along line IX-IX in FIG. 8. FIG.

[Explanation of symbols]

1 Hollow roll 6 holes 7 Heat pipe 8 Volume reducing member

[Figure 6]

Claims (1)

[Claims] 1. A hollow roll rotatably supported via a bearing, a plurality of holes axially bored at predetermined intervals in the circumferential direction of the hollow roll, and each hole provided with an evaporative material. and a volume reducing member inserted into the heat pipe so as to reduce the internal volume of the heat pipe. roll device.