JP3920082B2 - Induction heating roller device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an induction heat roller device.
[0002]
[Prior art]
For example, it is well known that a roller that rotates by induction heat generation to an appropriate temperature is used in a continuous heat treatment process of a sheet material or web material such as plastic film, paper, cloth, nonwoven fabric, and metal foil. Specifically, journals are integrally attached to both sides of a roller having a hollow interior, and a drive shaft integrated with the journal is rotatably supported with respect to the machine base, and an induction heating mechanism is disposed inside the roller. The induction heat generating mechanism is supported in a suspended state inside the roller by supporting the drive shaft with a bearing.
[0003]
FIG. 6 shows a conventional example of such an induction heating roller device. To explain this configuration, 1 is a roller, 2A and 2B are journals attached to both sides of the roller 1, 3A and 3B are integral with each journal 2A and 2B, and are hollow drive shafts, which are bearings 4A. , 4B is rotatably supported on the machine base 5. Reference numeral 6 denotes an induction heating mechanism, which includes a cylindrical iron core 8 supported on the outer periphery of a cylindrical holder 7 and an induction coil 9 wound around the outer periphery thereof.
[0004]
Reference numerals 10A and 10B denote support rods attached to the end portions of the holder 7 so as to extend integrally. The support rods are inserted into the drive shafts 3A and 3B, and are driven through bearings 11A and 11B. It is supported with respect to the shafts 3A and 3B. As a result, the induction heating mechanism 6 is supported in a suspended state inside the roller 1. A lead wire 12 is connected to the induction coil 9, passes through one support rod 10B, is led out from the outer end thereof, and is connected to a required AC power source. Reference numeral 13 denotes a rotation stopper for preventing the support rod 10B from rotating as the roller 1 rotates.
[0005]
According to such a conventional configuration, the outer periphery of each drive shaft 3A, 3B is rotatably supported by the machine base 5 via the bearing 4, and the support rods 10A, 10B are arranged on the inner periphery via the bearings 11A, 11B. Therefore, if the inner and outer peripheral axes of the drive shafts do not coincide with each other, the axial center of the support rod is periodically eccentric during the rotation of the roller 1, thereby causing the support rod At the same time, the induction heating mechanism 6 vibrates. The induction heating mechanism 6 vibrates even when the inner and outer circumferences of both drive shafts as well as either one do not coincide. Further, if the shaft centers of the inner circumferences of the drive shafts on both sides do not coincide with the axis of the outer circumferences, the vibration becomes more remarkable.
[0006]
In order to avoid the occurrence of such vibrations, it is necessary to process the drive shaft so that the inner and outer circumferences of the drive shaft coincide with each other. Therefore, specifically, the journal and the drive shaft integral with the journal are first processed. Next, this is assembled to the roller, and the outer periphery of the roller is finished. At this time, the outer periphery of the drive shaft is also finished in the same manner, so that the outer periphery of the roller coincides with the outer periphery of the drive shaft. Let After that, with the roller assembled, the inner periphery of the drive shaft is finished to match the inner and outer axes. Such a machining operation is necessary for both drive shafts and must be finished so that the inner and outer peripheral axes of both drive shafts coincide with each other. Thus, in order to avoid the vibration of the induction heating mechanism and the support rod, high-precision processing is required, and adjustment processing is required.
[0007]
Further, when the induction heating mechanism is suspended in the roller, if the induction heating mechanism bends or the support rod bends, an irregular load is applied to the bearings 11A and 11B. The rotation of the roller becomes unstable and smooth rotation cannot be obtained. In conventional for you avoid this was with the existing mechanical strength greater as the support rod and holder 7.
[0008]
[Problems to be solved by the invention]
An object of the present invention is to simplify a means for avoiding vibration of an induction heating mechanism.
[0009]
An object of the present invention is to enable a roller to rotate smoothly even if a deflection occurs in a suspended state of an induction heating mechanism.
[0010]
[Means for Solving the Problems]
The present invention includes a rotating roller, a drive shaft connected to each end of the roller, an induction heat generation mechanism disposed inside the roller, and a support rod that supports each end of the induction heat generation mechanism. for example, one of the pre-Symbol supporting rod via a bearing mechanism having a self-aligning feature is supported on one inner surface of the drive shaft, the other of said support rods, and led to the outside from the other of said drive shaft, An induction heating roller device in which the derived support rod is supported by being inserted into a ring fixed to a machine base via a connector, and is supported on an outer periphery of the support rod derived to the outside in an axial direction. A groove extending along the groove is provided, and a protrusion fitted into the groove is provided inside the ring. The protrusion is fitted into the groove so that the support rod cannot rotate with respect to the ring and slides along the axial direction. freely Characterized in that it was.
[0011]
Since at least one of the support rods is free from the drive shaft and is led out from the drive shaft, it is not always necessary to align the inner and outer circumferences of the drive shaft with high accuracy. . Since the other support rod is supported by the drive shaft through a bearing mechanism having an automatic alignment function, it is necessary to make the inner and outer periphery of the drive shaft coincide with each other. It is not necessary to adjust the shaft centers of the two drive shafts, and correction processing for making the shaft centers of the two drive shafts coincide with each other is also unnecessary.
[0012]
And since it is supported on the drive shaft through a bearing mechanism that has an automatic alignment function, even if the support rod and induction heating mechanism are deflected, a centering action occurs according to the deflection, and the roller is smooth. It starts to rotate. In this case, it is not necessary to give a large mechanical strength to the support rod and the induction heating mechanism as in the prior art.
[0013]
One support rod is led out from the drive shaft and supported by the fixed part. However, since this support rod is slidable, the support rod and the induction heating mechanism may extend due to thermal expansion. However, thermal expansion is absorbed by the slide of the support rod. Therefore, mechanical destruction due to thermal expansion can be avoided.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIG. In addition, the part which attached | subjected the same code | symbol as FIG. 6 shows the part which is the same or respond | corresponds. According to the present invention, a bearing mechanism 21 having a self-aligning function is interposed between the one support rod 10A and the drive shaft 3A instead of the conventional bearing 11A. The illustrated bearing mechanism 21 includes a self-aligning bearing 22 and a rolling bearing 23 provided on the outside thereof.
[0015]
The self-aligning bearing 22 will be described with reference to FIG. 2. The self-aligning bearing 22 includes an inner ring 24 having a spherical outer peripheral surface, an outer ring 25 having a spherical surface slidable with respect to the outer peripheral surface of the inner ring 24, and an outer ring. The bearing sleeve 26 supports the outer ring 25, the spacer 27 that fixes the outer ring 25 to the bearing sleeve 26, and the ring 28. The inner ring 24 is attached to the outer periphery of the support rod, the rolling bearing 23 is interposed between the bearing sleeve 26 and the inner periphery of the drive shaft 3A, and the outer ring of the rolling bearing 23 is attached to the inner periphery of the drive shaft 3A. Yes.
[0016]
Slip occurs on the spherical surfaces of the inner ring 24 and the outer ring 25, and an automatic alignment function is generated. Therefore, even if the support rod 10A is tilted or bent, the drive shaft 3A rotates smoothly. In addition, even if there is a deflection, smooth rotation is possible, and therefore it is not necessary to hold the induction heating mechanism 6 firmly. Therefore, the holder 7 as shown in FIG. 6 can be omitted. The inner ring 24 is fixed to the support rod 10A by a fixing ring 29.
[0017]
The support rod 10 </ b> B is led out from the drive shaft 3 </ b> B, and the lead-out end portion thereof is supported by a fixed portion, for example, the machine base 5 via the connector 30. Specifically, a ring 31 fitted to the outer periphery of the leading end portion of the support rod 10 </ b> B is fixed to the connector 30. In this example, the support rod 10 </ b> B is slidable with respect to the ring 31. Here, as shown in FIG. 3, a groove 32 extending along the axial center direction is provided on the outer periphery of the support rod 10 </ b> B, and a protrusion 33 slidable in the groove 32 is integrated with the ring 31. Yes. It is also possible to add a mechanism that can adjust the position of the support rod 10B vertically and horizontally to the connector 30.
[0018]
When the induction heating mechanism 6 and the support rods 10A and 10B are thermally expanded along with the heat generation of the roller 1, the inner ring 24 of the self-aligning bearing 22 is fixed by the fixing ring 29. Therefore, the induction heating mechanism 6 and the support rod 10A. , 10B generally expands toward the right side in the figure. Since the protrusion 33 is in the groove 32 and is slidable, these expansions expand without any problem. Therefore, no mechanical damage of each part occurs.
[0019]
In this configuration, the drive shaft 10A on the side where the self-aligning bearing 22 is installed needs to be modified so that the inner circumference and the outer circumference coincide with each other as in the conventional case, but the other drive shaft 10B. No correction processing is required for. Therefore, the correction process is simplified accordingly. 1, the positions of the rolling bearing 23 and the self-aligning bearing 22 are changed as shown in FIG. 4, and the rolling bearing 23 is disposed between the outer periphery of the support rod 10A and the self-aligning bearing 22. May be. Specifically, the inner ring of the rolling bearing 23 may be attached to the outer periphery of the support rod, and the outer ring of the self-aligning bearing 22 may be attached to the inner periphery of the drive shaft.
[0020]
In FIG. 1, reference numeral 41 denotes a temperature sensor for measuring the temperature of the peripheral wall of the roller 1, and a temperature signal detected by the temperature sensor 41 is sent to the rotary transformer 43 via the lead wire 42. The rotary transformer 43 includes a rotation side coil 44 integral with the drive shaft 3B, and a fixed side coil 45 integral with the support rod 10B. A temperature signal induced in the stationary coil 45 is taken out from the terminal 46.
[0021]
47 is a seal mechanism, the inner peripheral end of which is fixed to the support rod 10A, and the outer peripheral end is made of a ring that can slide freely on the inner peripheral surface of the drive shaft 3A. This is to prevent the bearing function from deteriorating by flowing to the bearing mechanism 21 side. Reference numeral 48 denotes a jacket chamber provided inside the peripheral wall of the roller 1, in which a gas-liquid two-phase heat medium is enclosed. Reference numeral 49 denotes a fixing ring for fixing the bearing 4 between the drive shaft 3 </ b> A and the machine base 5.
[0022]
[0023]
[0024]
[0025]
[0026]
[0027]
FIG. 5 shows another bearing mechanism 21. The bearing mechanism 21 shown here is a self-aligning roller bearing and is slidable with respect to the support rod 10A. Explaining this configuration, it is mainly configured by an outer ring 61 having an inner peripheral surface of a spherical surface, an inner ring 62 having an outer peripheral surface of a spherical surface, and a roller 63 interposed between the two wheels. The outer ring 61 is pressed against the step portion 65 by a cap 64 and fixed. The inner ring 62 is slidable on the peripheral surface of the support rod 10A. The support rod 10A is kept stationary with respect to the rotation of the drive shaft 3A by the rollers 63, and the rotation of the drive shaft 3A is stably maintained against the inclination of the support rod 10A by the spherical surfaces of both wheels 61 and 62. Reference numeral 66 denotes an oil seal.
[0028]
【The invention's effect】
As described above, according to the present invention, one support rod of the induction heating mechanism is supported on the inner surface of one drive shaft via a bearing mechanism having an automatic alignment function, and the other support rod is mounted on the other support rod. Since it was led out to the outside from the drive shaft and the derived support rod was supported by the machine base so as to be slidable in the axial direction via the coupler , the inner and outer peripheral shaft centers of one drive shaft were not necessarily It is not necessary to match with high accuracy, and thermal expansion can be absorbed. Even if the support rod and induction heating mechanism are bent, the roller rotates smoothly. There is an effect that it is not necessary to give the target strength.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of a part of FIG.
FIG. 3 is an enlarged cross-sectional view of another part of FIG. 1;
4 is an enlarged cross-sectional view showing a modified example of the configuration of FIG. 2. FIG.
FIG. 5 is a cross-sectional view showing another example of a bearing mechanism having an automatic alignment function.
FIG. 6 is a cross-sectional view of a conventional example.
[Explanation of symbols]
1 Roller 3A Drive shaft 3B Drive shaft 5 Fixed part (machine base)
6 Magnetic flux generating mechanism 10A Support rod 10B Support rod 21 Bearing mechanism 30 coupling tool with self-aligning function
31 Fixing ring
32 grooves
33 Protrusions

Claims (2)

A roller which rotates, a drive shaft connected to each end of the roller, the induction heating mechanism disposed inside the roller, Bei example a support rod for supporting the respective ends of the induction heating mechanism, before Symbol One of the support rods is supported on one inner surface of the drive shaft via a bearing mechanism having a self-aligning function, the other of the support rods is led out from the other of the drive shafts, and the derived An induction heating roller device in which a support rod is supported by being fitted into a ring fixed to a machine base via a connector, and is a groove extending along an axial direction on an outer periphery of the support rod led out to the outside provided with a projection fitted into the groove on the inside of the ring formed was freely slide along the axial direction while unrotatable the support rod relative to said ring by fitting the protrusion into the groove induction Heat roller device. The bearing mechanism includes a self-aligning bearing including an inner ring having a spherical outer peripheral surface, and an outer ring having a spherical surface slidable with respect to the outer peripheral surface of the inner ring, and an outer side of the self-aligning bearing. or induction heating roller apparatus according to claim 1 Symbol mounting comprising a rolling bearing provided on the inner side.

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