JP2585870B2 - Roll device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll device for heating paper, film and the like.

[0002]

2. Description of the Related Art FIG. 5 is a cross-sectional view showing a conventional roll device disclosed in, for example, JP-A-63-91991.
In the drawing, reference numeral 1 denotes a roll, 2 denotes a plurality of insertion holes formed at regular intervals in parallel with the center axis of the roll 1, 3 denotes a heat pipe inserted into each of the holes 2, 4 denotes this pipe It is an end plate.

Next, the operation will be described. The heat pipe exerts its effect by being tightly fixed to a hole provided in a roll. As a method of closely fixing the heat pipe to a hole provided in the roll, for example, there is a method disclosed in the publication. That is, first, a pipe having a diameter smaller than the diameter of the hole is inserted into a hole formed along the axial direction of the roll, and then a pipe expanding tool is pushed inside the one end of the pipe while being expanded toward the other end of the pipe by a pressing force. For example, when the roll is made of iron and the pipe is made of copper, copper is softer than iron. Therefore, when the pipe is expanded, the outer surface of the pipe is crushed and fixed tightly to the hole of the roll.

[0004]

Since the conventional roll is constructed as described above, if the processing accuracy is poor, such as uneven pipe wall thickness, flattening or bending of the hole provided in the roll, the pushing of the expanding pipe tool will be difficult. Pressure can be increased and decreased, and in places where the pressing force is small, the tightness between the pipe and the hole deteriorates, reducing the effectiveness of the heat pipe.In places where the pressing force is large, the pipe expansion tool cannot move in the pipe due to frictional force, etc. There was a problem.

The present invention has been made in order to solve the above-mentioned problems. Even if the processing accuracy such as uneven pipe thickness, flattening and bending of a hole formed in a roll is slightly deteriorated,
It is an object of the present invention to obtain a roll that can be expanded to tightly fix a pipe in a hole of the roll.

[0006]

A roll device according to the present invention is provided with a joining portion to which a pipe for introducing fluid pressure can be connected at the open end of a hole provided in the roll.

[0007]

In the roll device according to the present invention, a pipe is connected to the open end of a hole provided in the roll, and a fluid pressure such as a hydraulic pressure or a hydraulic pressure is introduced through the pipe. Fix it tightly in the hole of the roll.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numerals 1 to 4 denote the same parts as those shown in the above-mentioned conventional example, and reference numerals 5 denote both ends of the roll 1, which are joints of thread grooves provided in the holes 2.

Next, the operation will be described. First, a pipe 3 having a smaller diameter than the hole is inserted into a hole 2 formed along the axial direction of the roll, and then a pipe (not shown) is connected to a joint 5 on both sides of the hole. The pipe 3 is expanded by the fluid pressure described above, and the pipe 3 is closely fixed to the hole 2 of the roll. At this time, since the pipe is expanded by the fluid pressure, it is possible to expand the pipe by tightly fixing the pipe to the hole of the roll even if the processing accuracy such as unevenness of the pipe wall thickness, flatness or bending of the hole formed in the roll is somewhat poor. At the time of expanding the pipe, leakage of fluid from the joint 5 becomes a problem. However, if the joint is formed with a thread groove, not only is it easy to connect and remove the pipe to the pipe inserted into the roll, but also to improve the sealing property. Is high.

In the above-described embodiment, the screw hole 5 is provided in the hole 2 of the roll. However, as shown in FIG. 2, a projecting screw portion 6 protruding to the outside of the roll may be provided. Further, the groove 7 as shown in FIG. 3 may be used. Note that FIG.
(a) is a cross-sectional view of the roll end, (b) is a side view thereof, and (c) is
Check the correctness of the expansion pipe
The side view (a) and its side view (b) and (d) are for expanding the pipe at the roll end.
It is principal part sectional drawing which shows the state which fitted the pressure introduction pipe. This
In the case of, a projection 8a is formed around the pipe end as shown in FIG.
Is inserted into the groove 7 with the expansion fluid pressure pipe 8 protruding from the pipe.
After that, the projection 8a is caught inside the groove 7.
Rotate to lock, and provide a seal on the introduction pipe side.
If this is the case, the same effects as above can be obtained. Further, in the above embodiment, the roll is provided with a through-hole, and the joining portion is provided at both ends of the through-hole. However, as shown in FIG. The same effect can be obtained for the one provided with the joint portion 5 on the opening end side.

[0011]

As described above, according to the present invention, a pipe can be connected to a hole formed in a roll at both ends or an open end of the roll. When expanding a pipe, the pipe can be expanded using hydraulic pressure, hydraulic pressure, or other fluid pressure. Therefore, even if the processing accuracy is somewhat poor, such as uneven pipe thickness, flatness of the hole provided in the roll, and bending, etc. This has the effect that the pipe can be expanded without impairing the effectiveness of the heat pipe.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of an end portion of a roll showing another embodiment of the present invention.

3 (a) and 3 (b) are a sectional view and a side view of a roll end showing another embodiment of the present invention, and FIG. 3 (c) is a pipe expanding pressure.
In the front view (a) and side view (b) of the introduction pipe, (d)
It is principal part sectional drawing.

FIG. 4 is a sectional view showing a roll according to another embodiment of the present invention.

FIG. 5 is a sectional view showing a conventional roll.

[Explanation of symbols]

 1 roll, 2 holes, 3 pipes, 5 joints.

Claims (1)

(57) [Claims] 1. A hollow roll provided with a heat pipe which is provided with a plurality of holes on a circumference parallel to a central axis and which is inserted into the plurality of holes and expanded and closely fixed thereto. A roll device, characterized in that a joining portion to which a pipe for expanding fluid for introducing fluid pressure can be connected is provided at an open end of a hole provided in the roll.