JP2022013502A - Induction heating roller device - Google Patents

Abstract

To prevent an induction heating mechanism from being contacted to an inner peripheral surface of a roller body by dead-weight bending in simple configuration.SOLUTION: An induction heating roller device comprises: a cylindrical roller body 21 provided in a freely rotatable manner; hollow drive shafts 22 provided in both ends of the roller body 21 in an axial direction; an induction heating mechanism 3 disposed inside of the roller body 21; and support rods 6 provided in both ends of the induction heating mechanism 3 in an axial direction and inserted into the drive shafts 22. At least one of the support rods 6 includes an extension part 6x extending axially outside of the drive shaft 22 into which the support rod is inserted, and is supported in such a manner that a shaft center of the extension part 6x is positioned higher than a shaft center of the drive shaft 22.SELECTED DRAWING: Figure 1

Description

The present invention relates to an induction heating roller device.

As shown in Patent Document 1, the conventional induction heating roller device is provided with an induction heating mechanism inside the roller body, and a support rod for supporting the induction heating mechanism is provided on both ends of the roller body. It is configured to support the inner peripheral surface via a rolling bearing. With this configuration, the induction heating mechanism is held in the roller in a suspended state.

However, there is a problem that the induction heating mechanism bends due to its own weight inside the roller body, and the induction coil of the induction heating mechanism comes into contact with the inner peripheral surface of the roller body. This problem becomes more remarkable as the outer diameter of the roller body is smaller and the axial length of the roller body is longer.

In the above-mentioned Patent Document 1, the support rods are led out from the inside of the drive shafts on both sides to the outside, and the bending moment generating means for urging downward with the rolling bearing as a fulcrum is provided at each of the lead-out ends on both sides thereof. Not only is the structure complicated, but the bending moment is urged around the rolling bearing as a fulcrum, which puts a load on the rolling bearing.

Japanese Unexamined Patent Publication No. 2008-269826

Therefore, the present invention has been made to solve the above problems, and its main task is to prevent the induction heating mechanism from coming into contact with the inner peripheral surface of the roller body due to its own weight bending by a simple configuration. be.

That is, the induction heating roller device according to the present invention has a cylindrical roller body provided rotatably, hollow drive shafts provided at both ends of the roller body in the axial direction, and the inside of the roller body. An induced heat generating mechanism to be arranged and a support rod provided at both ends in the axial direction of the induced heat generating mechanism and inserted inside the drive shaft are provided, and at least one of the support rods is inserted. It has an extension portion extending outward in the axial direction from the drive shaft, and is characterized in that the axis of the extension portion is supported so as to be located above the axis of the drive shaft. And.

In such a case, at least one of the support rods has an extension portion extending outward in the axial direction from the drive shaft, and the axis of the extension portion is larger than the axis of the drive shaft. Since it is supported so as to be located on the upper side, it is possible to secure a clearance between the induction heating mechanism and the inner peripheral surface of the roller body in consideration of the self-weight deflection of the induction heating mechanism. As a result, it is possible to prevent the induction heating mechanism from coming into contact with the inner peripheral surface of the roller body due to its own weight bending by a simple configuration.

As a specific embodiment, one of the support rods has an extension portion extending axially outward from the inserted drive shaft, and the axis of the extension portion is the said. It is desirable that the support rod is supported so as to be located above the axis of the drive shaft, and the other support rod is supported by a rolling bearing on the inner peripheral surface of the drive shaft inserted.
With this configuration, in addition to the above effects, the inclination of the axis of the other support rod with respect to the axis of the other drive shaft can be reduced or made coaxial, so that the support rod is tilted. It is possible to reduce the load on the rolling bearing and solve the problem that the life of the rolling bearing is shortened.

In another specific embodiment, each of the two support rods has an extension extending axially outward from the inserted drive shaft, and the axis of the extension. However, it is desirable that the drive shaft is supported so as to be located above the axis of the drive shaft.
With this configuration, it is not necessary to support the support rod on the inner peripheral surface of the drive shaft via the rolling bearing, so that the rolling bearing can be eliminated and the life of the rolling bearing that supports the support rod is taken into consideration. There is no need.

Further, it is desirable that the induction heating roller device of the present invention further includes an adjustment support mechanism for supporting the extension portion and adjusting the position of the axial center of the extension portion.
By providing the adjustment support mechanism in this way, it is possible to make fine adjustments corresponding to the self-weight deflection of each induction heating mechanism of the induction heating roller device.

According to the present invention configured as described above, the induction heating mechanism can be prevented from coming into contact with the inner peripheral surface of the roller body due to its own weight bending.

It is sectional drawing and the side view which show typically the structure of the induction heating roller apparatus which concerns on one Embodiment of this invention. It is a schematic diagram which shows the state which supported the axis of the extension part above the axis of a drive shaft by the support mechanism in the same embodiment. It is sectional drawing and the side view which shows typically the structure of the induction heating roller apparatus of a modification embodiment. It is sectional drawing and the side view which shows typically the structure of the induction heating roller apparatus of a modification embodiment. It is sectional drawing and the side view which shows typically the structure of the induction heating roller apparatus of a modification embodiment.

Hereinafter, an embodiment of the induction heating roller device according to the present invention will be described with reference to the drawings.

<1. Device configuration>
The induction heating roller device 100 according to the present embodiment is used in a continuous heat treatment step of, for example, a sheet material such as a plastic film, paper, cloth, non-woven fabric, synthetic fiber, metal foil, or a continuous material such as a web material or a wire (thread) material. It is used.

Specifically, as shown in FIG. 1, this one includes a hollow roller 2 rotatably supported and an induction heat generation mechanism 3 provided inside the roller 2.

The roller 2 has a roller main body 21 having a hollow cylindrical shape for contacting the continuous materials to heat-treat the continuous materials, and hollow drive shafts 22 provided at both ends of the roller main body 21. The drive shaft 22 is rotatably supported by the machine base 5 via a bearing 4 such as a rolling bearing. The drive shaft 22 has a flange 221 connected to the axial end surface of the roller main body 21. The roller body 21 and the drive shaft 22 may be formed of a magnetic material such as carbon steel or a non-magnetic material such as stainless steel, but the roller body 21 and the drive shaft 22 are not limited thereto. The roller 2 is configured to be rotated by a driving force applied from the outside by, for example, a rotation driving mechanism (not shown) such as a motor. Further, a plurality of jacket chambers in which the gas-liquid two-phase heat medium is vacuum-enclosed may be formed on the side peripheral wall which is the thick portion of the roller main body 21 of the present embodiment.

The induction heating mechanism 3 includes a cylindrical iron core 31 having a cylindrical shape and an induction coil 32 wound around the outer peripheral surface of the cylindrical iron core 31.

Support rods 6 are provided at both ends of the cylindrical iron core 31 in the axial direction, and the support rods 6 are inserted into the drive shaft 22 respectively. At least one of the two support rods 6 has an extension portion 6x extending axially outward from the inserted drive shaft 22, and the extension portion 6x is provided outside the roller 2. It is supported by the support mechanism 7. In FIG. 1, one support rod 6 (6A) has an extension portion 6x and is supported by a support mechanism 7 without using a rolling bearing, and the other support rod 6 (6B) is a rolling bearing or the like. It is rotatably supported on the inner surface of the drive shaft 22 via the bearing 8 of the above. As a result, the induction heating mechanism 3 is held in a suspended state inside the rotating roller 2, that is, is held in a stationary state with respect to the machine base 5 (fixed side). For example, a detent member 9 fixed to the machine base 5 is connected to the extending portion 6x of one of the support rods 6 (6A) so that the induction heating mechanism 3 does not rotate.

Further, a power supply lead wire L1 is connected to the induction coil 32, and a power supply device (not shown) for applying an AC voltage of a commercial frequency (50 Hz or 60 Hz) is connected to the power supply lead wire L1. ing.

When an AC voltage is applied to the induction coil 32 by such an induction heating mechanism 3, an alternating magnetic flux is generated, and the alternating magnetic flux passes through the side peripheral wall of the roller main body 21. An induced current is generated in the roller main body 21 by this passage, and the roller main body 21 generates Joule heat by the induced current.

Therefore, the induction heating roller device 100 of the present embodiment is configured so that the induction heating mechanism 3 does not come into contact with the inner peripheral surface of the roller main body 21 due to the self-weight deflection of the induction heating mechanism 3.

In the induction heating roller device 100 shown in FIG. 1, as shown in FIG. 2, the axis of the extending portion 6x of one of the support rods 6 (6A) is located above the axis of the inserted drive shaft 22. It is supported by the support mechanism 7 so as to do so. Here, the offset amount of the axis of the extending portion 6x with respect to the axis of the drive shaft 22 is set so that the outer peripheral surface of the induction heating mechanism 3 does not come into contact with the inner peripheral surface of the roller main body 21. Further, this offset amount is set within a range in which the outer peripheral surface of one of the support rods 6 (6A) does not come into contact with the inner peripheral surface of the drive shaft 22 through which the support rod 6 (6A) is inserted.

The support mechanism 7 of the present embodiment is provided on the outer peripheral surface of the drive shaft 22 of the roller main body 21 via a rolling bearing 10. Further, the support mechanism 7 of the present embodiment has a function as an adjustment support mechanism for adjusting the position of the axial center of the extension portion 6x. The support mechanism 7 shown in FIG. 1 is configured by using a plurality of set screws 11 provided at equal intervals in the circumferential direction of the extending portion 6x. In FIG. 1, three set screws 11 are provided at equal intervals, and each set screw 11 comes into contact with the outer peripheral surface of the extension portion 6x so that the position of the axis of the extension portion 6x is only in the vertical direction. However, it is configured so that it can be adjusted in the left-right direction as well. The support mechanism 7 may be configured to move the axis of the extending portion 6x only in the vertical direction, or may have a vertical moving mechanism for moving the extending portion 6x in the vertical direction and a left / right moving mechanism for moving the extending portion 6x in the horizontal direction. It may be.

<2. Effect of this embodiment>
According to the induction heating roller device 100 according to the present embodiment configured as described above, one of the support rods 6 (6A) has an extension portion 6x extending axially outward from the drive shaft 22. Since the axis of the extending portion 6x is supported so as to be located above the axis of the drive shaft 22, the induction heating mechanism 3 and the roller main body are supported in consideration of the self-weight deflection of the induction heating mechanism 3. It is possible to secure a clearance with the inner peripheral surface of 21. As a result, it is possible to prevent the induction heating mechanism 3 from coming into contact with the inner peripheral surface of the roller main body 21 due to its own weight bending by a simple configuration.

Further, in the present embodiment, as shown in FIG. 2, the inclination of the axis of the other support rod 6 (6B) with respect to the axis of the other drive shaft 22 can be reduced or made coaxial. It is possible to reduce the load on the rolling bearing 8 caused by tilting the portion of the rod 6 (6B) supported by the rolling bearing 8 and solve the problem that the life of the rolling bearing 8 is shortened.

<3. Other Modifications>
The present invention is not limited to the above embodiment.
For example, although the support mechanism 7 of the above embodiment is provided on the drive shaft 22, the support mechanism 7 may be provided on the machine base 5 or other peripheral members as shown in FIG. Note that FIG. 3 shows a configuration in which the support mechanism 7 is screwed and fixed to the machine base.

Further, in the above embodiment, only one support rod 6 (6A) has an extension portion 6x, but as shown in FIGS. 4 and 5, two support rods 6A at both ends in the axial direction, Each of the 6Bs may have an extension portion 6x extending outward in the axial direction from the inserted drive shaft 22.

In this case, a support mechanism 7 is provided for each of the extension portions 6x at both ends in the axial direction, and the support mechanism 7 supports the axis of each extension portion 6x so as to be located above the axis of the drive shaft 22. do. In FIG. 4, the support mechanism 7 is provided on the outer peripheral surface of the drive shaft 22 via a rolling bearing 10, and in FIG. 5, the support mechanism 7 is screw-fixed to the machine base 5 and other peripheral members. It is a composition. Further, the support mechanism 7 shown in FIGS. 4 and 5 has a function as an adjustment support mechanism as in the above embodiment.

In addition, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

100 ... Induction heating roller device 21 ... Roller body 22 ... Drive shaft 3 ... Induction heating mechanism 5 ... Machine base 6 ... Support rod 6x ... Extension 7 ... Adjustment support mechanism 10 ... Rolling bearing

Claims (5)

A rotatably provided cylindrical roller body and
Hollow drive shafts provided at both ends of the roller body in the axial direction,
The induction heating mechanism arranged inside the roller body and
A support rod provided at both ends in the axial direction of the induction heating mechanism and inserted inside the drive shaft is provided.
At least one of the support rods has an extension portion extending axially outward from the inserted drive shaft, and the axis of the extension portion is more than the axis of the drive shaft. An induction heating roller device that is supported to be located on the upper side. One of the support rods has an extension portion extending outward in the axial direction from the inserted drive shaft, and the axis of the extension portion is above the axis of the drive shaft. Supported to be located,
The induction heating roller device according to claim 1, wherein the other support rod is supported on the inner peripheral surface of the inserted drive shaft via a rolling bearing. Each of the two support rods has an extension portion extending axially outward from the inserted drive shaft, and the axis of the extension portion is above the axis of the drive shaft. The induction heating roller device according to claim 1, which is supported so as to be located in. The induction heating roller device according to any one of claims 1 to 3, further comprising an adjustment support mechanism for supporting the extension portion and adjusting the position of the axial center of the extension portion. The induction heating roller device according to claim 4, wherein the adjustment support mechanism is provided on the drive shaft or the machine base via a rolling bearing.

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