JPS6334235Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an induction heating roller suitable for a heat treatment roller for heat treating running yarn used in a yarn processing machine such as a twisting machine or a straight stretching machine.

The above-mentioned induction heating roller is disclosed in Japanese Utility Model Publication No. 1986-29650, Japanese Patent Application Laid-Open No. 1982-104134, and Japanese Utility Model Publication No. 1982-104134.
This is known from Japanese Patent No. 15758 and the like, and is configured as shown in FIG. 1, for example.

That is, a roller body 2 made of a magnetic material attached to a drive shaft 1, and a shell portion 2a of the roller body 2.
conductive layers 3 and 4 made of a highly conductive material such as copper provided on the inner circumferential surface of the roller body 2; an iron core 5 disposed inside the roller body 2 and fixed to a machine base (not shown);
By exciting the coil 6 with an AC power supply, alternating magnetic flux is generated in the magnetic path 7 consisting of the iron core 5 and the roller body 2, and the shell part 2a is heated by induction. It is configured as follows. As is well known, the conductive layers 3 and 4 are provided in order to make the temperature distribution of the shell portion 2a of the roller body 2 uniform and to improve the power factor.

By the way, in conventional induction heating rollers, although the conductive layers 3 and 4 are fixed by welding, explosion bonding, etc., they peel off due to repeated heat cycles such as rest and operation, and the conductive layers 3 and 4 peel off. Roller body 2
There was a problem in that the temperature distribution pattern of the shell portion 2a changes due to the movement in the axial direction of the shell portion 2a, resulting in abnormal quality of the yarn to be processed. In some cases, the conductive layers 3, 4
There was a problem that the roller could escape from the roller body 2 and cause dangerous equipment trouble.

The present invention was made to solve this problem, and provides an induction heating roller that has no axial fluctuation of the conductive layer, has stable temperature distribution, and has no safety issues.

That is, the present invention provides an induction heating roller in which a conductive layer is provided at a plurality of locations on the inner peripheral surface, and a narrow annular groove or an annular protrusion in the circumferential direction is provided in a part of the inner peripheral surface where the conductive layer is provided. , an induction heating roller characterized in that the conductive layer is formed by plating.

The present invention will be explained below with reference to the drawings.

FIG. 2 is an explanatory diagram of one embodiment of the present invention, whose basic configuration is the same as that of the induction heating roller shown in FIG. only is shown.

As is clear from the figure, the inner circumferential surface of the shell portion 2a of the roller body 2 on which the conductive layers 3 and 4 are provided has two annular grooves for each of the conductive layers 3 and 4, thus a total of four annular grooves. 8a, 8b, 9a, 9b are bored. The conductive layers 3 and 4 have an annular groove 8a,
8b, 9a, and 9b.
Note that the conductive layers 3 and 4 have annular grooves 8a and 8 on their inner peripheral surfaces.
b, 9a, 9b are formed by plating such as electroplating on the roller body 2a in which the holes 9b, 9a, and 9b are formed, so that they can be easily provided on the inner circumferential surface of the shell portion 2a without giving undue strain to the roller body 2. can.

With the above configuration, this example exhibits excellent effects as described below. That is, as mentioned above, since the annular grooves 8a, 8b and 9a, 9b of the roller body 2 are fitted with the fitting protrusions 3a, 3b and 4a, 4b of the conductive layers 3, 4, the heat cycle is not repeated. Even if the conductive layers 3 and 4 are peeled off from the inner peripheral surface of the roller body 2, the engagement between the annular grooves 8a and 8b and the fitting protrusions 3a and 3b and between the annular grooves 9a and 9b and the fitting protrusions 4a and 4b is maintained. The conductive layers 3, 4 do not move in the axial direction of the roller body 2 as in the conventional case. In the operating state where the temperature is increased, the conductive layers 3 and 4 are brought into close contact with the inner circumferential surface of the roller body 2 due to thermal expansion.
The heat transfer between the roller body 2 and the inner circumferential surface of the roller body 2 is the same as before peeling, and therefore the surface temperature distribution of the shell portion 2a of the roller body 2 is maintained as designed.

To give a specific example, in a roller of 100 mmφ x 200 mm L, an annular groove having a groove width of 0.3 mm and a groove depth of 0.5 mm was practically sufficient.

Although the present invention has been described above based on examples, the present invention is not limited to such examples.

Although the annular groove capable of locking the conductive layer around the entire circumference is shown, any groove that can prevent the conductive layer from moving in the axial direction of the roller even if the conductive layer peels off from the inner peripheral surface of the roller body is sufficient. This is clear from the purpose of the present invention. Therefore, a protrusion may be used instead of a groove shape, and it is sufficient to provide an annular groove or protrusion oriented in the circumferential direction and provide the conductive layer so as to fit into the groove or protrusion.

Furthermore, we have shown a method in which the conductive layer is provided only at both ends of the roller body, which is suitable for making the temperature distribution uniform in the shell part of the roller body, but the location of the conductive layer depends on the temperature distribution, capacity, etc. required for the roller. It should be designed accordingly. Note that it is preferable to provide about 1 to 5 grooves or protrusions into which the above-mentioned conductive layer is fitted, depending on the width thereof, at the location where the conductive layer is provided.

As described above, in the present invention, the mounting position of the conductive layer is stabilized by fitting the circumferentially oriented annular groove or protrusion into the location where the conductive layer is to be provided on the inner peripheral surface of the shell portion of the roller body. I measured the
An induction heating roller with stable surface temperature distribution and trouble-free was obtained. As described above, the present invention has a great effect on stabilizing the induction heating roller.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of a conventional induction heating roller;
The figure is a sectional side view of a main part of an induction heating roller according to the present invention. 1... Drive shaft, 2... Roller body, 3, 4...
Conductive layer, 8a, 8b, 9a, 9b... annular groove.

Claims (1)

[Scope of utility model registration request] In an induction heating roller in which a conductive layer is provided at a plurality of locations on the inner peripheral surface, a narrow annular groove or an annular protrusion in the circumferential direction is provided in a part of the inner peripheral surface where the conductive layer is provided, and the conductive layer is formed by plating. A dielectric heating roller comprising: