JP5557540B2 - Induction heating roller device - Google Patents

Description

  The present invention relates to an induction heat roller device, and more particularly to an induction heat roller device having excellent cooling performance.

  Conventionally, for example, a continuous heat treatment process for a sheet material such as plastic film, paper, cloth, non-woven fabric, synthetic fiber, metal foil, or a continuous material such as a web material, a wire (thread) material, etc., is guided inside the rotating roller body. An induction heating roller device is used in which a heat generation mechanism is arranged to heat the peripheral wall portion of the roller body by an induced current.

  In recent years, for example, there has been a request for changing the heating temperature by the roller body accompanying changing the type of continuous material in a short time. Further, after the end of the stretching process, from the viewpoint of health and safety, the operator cannot leave the site unless the temperature of the roller body is lowered below a certain temperature. For this reason, it is necessary to cool the roller body in as short a time as possible. Furthermore, the induction heating roller device is not only used for heating the continuous material but also used for cooling, and the induction heating roller device needs to have a cooling function.

  In this way, the induction heating roller device is provided with a cooling function. As shown in Patent Document 1, a plurality of cooling media are arranged along the central axis in the circumferential wall of the roller body and at equal intervals in the circumferential direction. It has been considered that a roller body is cooled by providing a passage and circulating the cooling medium in the cooling medium passage.

  However, in order to circulate the cooling medium in the cooling medium passage, it is necessary to supply the cooling medium from the outside through a roller body or a shaft portion (journal portion) integrally provided at the end portion thereof. Since the journal part is a rotating body, a rotary seal mechanism such as a rotary joint or a mechanical seal is required.

  On the other hand, as a configuration not using the rotary seal mechanism, as shown in Patent Document 2, a refrigerant introduction mechanism that introduces a cooling medium into the roller main body, and a cooling medium introduced by the refrigerant introduction mechanism is used for the roller main body. A coolant spraying mechanism that sprays water droplets toward the inner peripheral wall, and cools the roller body by latent heat of vaporization (vaporization heat) when the sprayed cooling medium contacts and vaporizes the inner peripheral wall of the roller body Is considered. The refrigerant spraying mechanism has a discharge pipe extending from one end portion to the other end portion of the inner peripheral wall of the roller body along the axial direction, and is cooled from a discharge port provided on the side wall of the discharge pipe. The medium is sprayed in the form of water droplets.

  However, since the cooling medium is directly sprayed on the inner peripheral wall of the roller body, impurities or non-evaporated components contained in the cooling medium are deposited on the inner peripheral wall of the roller body. In addition, the discharge pipe of the refrigerant spraying mechanism is configured so that the cooling medium is sprayed through the fine holes, so that dust or the like contained in the cooling medium is clogged into the fine holes and the spraying mechanism is clogged. There is a problem in that the induction heating roller device must be disassembled and the discharge pipe or the like must be replaced. Furthermore, in the induction heating roller device, the case where the continuous material is used as a heating roller for the purpose of heating and the case where the continuous material is used as a cooling roller for the purpose of cooling may occur alternately. In this case, when used as a heating roller after being used as a cooling roller, the cooling medium staying in the discharge pipe of the refrigerant spraying mechanism is heated by heat transfer from the roller body, possibly causing boiling. There is.

  In order to solve such problems, the present applicant did not need to provide a rotation seal mechanism in the roller body, and was supported rotatably in order to cool the roller body while suppressing corrosion of the roller body. A roller body, an induction heating mechanism that is held stationary with respect to the roller body inside the roller body, and that causes the roller body to generate heat, and a mist-like cooling medium is formed between the roller body and the induction heating mechanism. The induction heating roller device is being developed with a cooling mechanism that is introduced from the axial end of the cylindrical gap and that discharges the cooling medium from the axial end of the gap to the outside of the roller body. . In this induction heating roller device, by introducing a mist-like cooling medium into the roller main body, the latent heat of vaporization and the mist-like cooling medium when the mist-like cooling medium evaporates in contact with the inner peripheral wall of the roller main body are generated. The roller body or the induction heating mechanism is cooled by sensible heat when the temperature rises in the roller body and by latent heat when vaporizing and evaporating.

  Specifically, the cooling mechanism is formed in a mist generating device that generates a mist-like cooling medium and a support shaft that extends from both ends of the induction heating mechanism, and cooling that introduces the mist-like cooling medium into the gap portion. A medium introduction path is provided. The downstream opening of the cooling medium introduction path is configured to open to the outer peripheral surface of the support shaft and introduce the mist-like cooling medium to the axial end of the gap along the radial direction. It is considered.

  However, since the mist-like cooling medium that exits from the downstream opening of the cooling medium introduction path collides with the inner surface of the axial end portion of the roller body and flows downstream in the axial direction of the gap portion, The cooling medium tends to be droplets. If it does so, many droplets will vaporize and evaporate in the collision part, and a cooling density will become high compared with the downstream of a clearance gap part. As a result, there is a problem in that the axial end of the roller body is locally overcooled and adversely affects the temperature distribution of the roller body.

  In particular, in a calendar application in which a plurality of induction heating roller devices that make a pair are used as nip rollers and hot rolling or thickness adjustment is performed by passing a web or the like through the roller nip portion, the cylindricity between the rollers is extremely high. It is important, and if it is overcooled locally as described above, the outer diameter in the vicinity of the axial end of the roller body becomes smaller than the other outer diameters, and the hot cylindricity is deteriorated. There is a problem of end.

JP 2000-353588 A JP 2003-269442 A

  Accordingly, the present invention has been made to solve the above-mentioned problems all at once, and in the case where a mist-like cooling medium is supplied into a gap formed by the roller body and the induction heat generating mechanism, the mist-like cooling medium is provided. Preventing the roller main body from being overcooled locally by the medium is a main intended problem.

That is, an induction heating roller device according to the present invention includes a roller body that is rotatably supported, an induction heating mechanism that is disposed inside the roller body and that causes the roller body to generate heat, and a mist-like cooling medium is used as the roller. A cooling mechanism that is introduced from an axial end of a substantially cylindrical gap formed between the main body and the induction heating mechanism, and that discharges a cooling medium from the axial end of the gap to the outside of the roller body; The cooling mechanism is formed inside a mist generating device that generates a mist-like cooling medium, and a support shaft extending from both ends of the induction heating mechanism, and a downstream opening is an outer periphery of the support shaft. A cooling medium introduction path that opens to a surface and introduces the mist-like cooling medium from the mist generating device along the radial direction into the axial end of the gap, and the axial direction of the gap edge Provided, the atomized cooling medium flowing along the radial direction from the downstream opening, a guide portion for guiding the axially downstream side of the gap portion, the mist generating device, one end of the induction heating mechanism It is characterized in that it is detachably provided on a support provided in the section .

  In such a case, since the cooling medium flowing in the radial direction from the downstream opening of the cooling medium introduction path is guided by the guide portion so as to be diverted to the downstream side in the axial direction of the gap portion, It is possible to reduce droplet formation caused by the cooling medium colliding with the inner surface of the axial end portion of the roller body. As a result, it is possible to prevent the end portion in the axial direction of the roller body facing the downstream opening from being overcooled locally. Further, the flow of the mist-like cooling medium can be efficiently changed from the radial direction to the axial direction by the guide portion, and the mist-like cooling medium can be easily distributed over the entire gap portion.

  Since the mist-like cooling medium hits the guide portion, it is conceivable that the guide portion is overcooled compared to other members. In order to reduce as much as possible the thermal effect on the roller body from the overcooled guide part, the guide part is provided on the inner peripheral surface of the roller body with a heat insulating layer interposed. desirable.

  In order to reduce the thermal influence from the guide part to the roller body as much as possible with a simple configuration, the guide part is fixed to inner surfaces of journals provided at both ends of the roller body, It is desirable to be provided apart from the inner peripheral surface.

  In addition, in order to thermally separate the guide portion and the member to which the guide portion is fixed to suppress the thermal influence from the guide portion, the guide portion forms an axial end portion of the gap portion. It is desirable that the member to be fixed is fixed by a fixing member having heat insulation.

  Since the roller body rotates with respect to the induction heating mechanism, the roller body rotates relative to the downstream opening of the cooling medium introduction path provided on the support shaft of the induction heating mechanism. Under this configuration, in order to efficiently guide the mist-like cooling medium flowing in the radial direction from the downstream opening to the downstream side of the gap portion, the guide portion is provided on the entire circumference of the axial end portion of the gap portion. It is desirable that

  According to the present invention configured as described above, when the mist-like cooling medium is supplied into the gap formed by the roller body and the induction heating mechanism, the roller body is locally overcooled by the mist-like cooling medium. Can be prevented.

It is sectional drawing of the induction heating roller apparatus which concerns on one Embodiment of this invention. It is an enlarged view which mainly shows the cooling medium introduction path and the guide part of the embodiment. It is an AA line sectional view of the embodiment. It is a partial expanded sectional view which shows the guide part which concerns on deformation | transformation embodiment. It is a partial expanded sectional view which shows the guide part which concerns on another deformation | transformation embodiment.

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

  The induction heating roller device 100 according to the present embodiment is, for example, in a continuous heat treatment process of a continuous material such as a sheet material such as a plastic film, paper, cloth, nonwoven fabric, synthetic fiber, and metal foil, a web material, and a wire (thread) material. It is used.

  Specifically, as shown in FIG. 1, this includes a hollow cylindrical roller body 2 rotatably supported and an induction heat generating mechanism 3 accommodated in the roller body 2.

  Journals 41 are attached to both ends of the roller body 2 via seal members S1 such as O-rings. This sealing member S1 prevents a mist-like cooling medium described later from leaking to the outside. Further, the journal 41 is configured integrally with a hollow drive shaft 42, and the drive shaft 42 is rotatably supported by the machine base 52 via a bearing 51 such as a rolling bearing. The roller body 2 is configured to be rotated by a driving force applied from the outside by a rotation driving mechanism (not shown) such as a motor.

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 shafts 6 that are supports are attached to both ends of the cylindrical iron core 31, respectively. Each of the support shafts 6 is inserted into the drive shaft 42 and is rotatably supported with respect to the drive shaft 42 via a bearing 7 such as a rolling bearing. Thereby, the induction heating mechanism 3 is held in a stationary state inside the rotating roller body 2. A lead wire L <b> 2 is connected to the induction coil 32, and an AC power source V for applying an AC voltage is connected to the lead wire L <b> 2 via the power adjustment device 11. A seal mechanism S2 such as an oil seal or a labyrinth seal is provided between the outer surface of the support shaft 6 and the inner surface of the drive shaft 42 so that the mist-like cooling medium does not leak to the outside. Yes.

  With such an induction heating mechanism 3, an alternating magnetic flux is generated when an AC voltage is applied to the induction coil 32, and the alternating magnetic flux passes through the side peripheral wall 21 of the roller body 2. This passage generates an induced current in the roller body 2, and the roller body 2 generates Joule heat by the induced current.

  The induction heat roller device 100 of this embodiment includes a cooling mechanism 8 that cools the roller body 2 and the induction heat generation mechanism 3 with a mist-like cooling medium.

  As shown in FIG. 1, the cooling mechanism 8 introduces a mist-like cooling medium from one end in the axial direction of a substantially cylindrical gap X formed between the roller body 2 and the induction heating mechanism 3. The roller main body 2 and the induction heating mechanism 3 are cooled by discharging the cooling medium from the other axial end of the gap X to the outside of the roller main body 2. The axial direction is the left-right direction of the paper as indicated by the arrows in FIG.

  Specifically, this is a mist generating device 81 that generates a mist-like cooling medium, a compressed air supply circuit 82 that supplies compressed air to the mist generating device 81, and water that is a cooling medium is supplied to the mist generating device 81. The cooling medium supply circuit 83 that performs the cooling medium introduction path 84 that introduces the mist-shaped cooling medium from the mist generating device 81 from the upstream end in the axial direction of the gap X, and the cooling medium that has passed through the gap X And a cooling medium discharge path 85 for discharging from the downstream end in the direction to the outside.

  The gap portion X has airtightness, and is mainly a substantially cylindrical gap X1 formed by the inner peripheral wall surface of the roller body 2 and the outer peripheral surface of the induction heating mechanism 3, and both ends of the roller body 2. It consists of a substantially annular gap X2 formed by the inner surface of the journal 41 provided in the section and the axial end surface of the induction heating mechanism 3.

  The mist generating device 81 mixes the compressed air from the compressed air supply circuit 82 and the water from the cooling medium supply circuit 83 to generate a mist (mist) cooling medium. This mist-like cooling medium has a particle size that does not vaporize and evaporate immediately after being injected, and falls by gravity in the process of being transported with air, or collides with a wall surface at a bent portion of the flow path. The particle size is difficult to liquefy. Specifically, the mist-like cooling medium has a particle size in the range of 30 to 100 μm.

  The compressed air supply circuit 82 is provided on a compressed air source 821, a compressed air pipe 822 having one end connected to the compressed air source 821, and the other end connected to the mist generating device 81, and the compressed air pipe 822. And an on-off valve 823 for controlling the supply and stop of compressed air to the mist generating device 81. The on-off valve 823 is an electromagnetic valve that opens and closes by an ON / OFF signal from the temperature control device TC.

  The cooling medium supply circuit 83 is provided on the water storage tank 831, a cooling medium pipe 832 having one end connected to the water storage tank 831 and the other end connected to the mist generating device 81, and the cooling medium pipe 832. An on-off valve 833 for controlling the supply and stop of the cooling medium to the device 81 and a flow rate adjusting valve 834 (downstream valve 833 provided downstream of the on-off valve 833 for adjusting the flow rate of the cooling medium supplied to the mist generating device 81) For example, a pressure reducing valve). The on-off valve 833 is an electromagnetic valve that opens and closes by an ON / OFF signal from the temperature control device TC.

  The temperature control device TC receives a detection signal of a temperature sensor 2T embedded in the peripheral wall of the roller body 2 via a temperature detection device (specifically, a rotary transformer) 10, and determines a detection temperature indicated by the detection signal and a predetermined value. The set temperature is compared, and power supply to the induction coil 32 and supply of the mist-like cooling medium are controlled so that the detected temperature becomes the set temperature. The temperature control device TC outputs a signal to be input to the induction coil 32 to the power adjustment device 11 configured using, for example, a thyristor, according to the difference between the detected temperature and the set temperature.

  Further, when the detected temperature is higher than the set temperature, the temperature control device TC supplies an atomized cooling medium to the gap X to cool the roller body 2 so that the on-off valve 823 of the compressed air supply circuit 82 is cooled. In addition, an ON signal is output to the on-off valve 833 on the cooling medium supply circuit 83. On the other hand, when the detected temperature falls below the set temperature, an OFF signal is output to the on-off valve 823 and the on-off valve 833 in order to stop the supply of the mist-like cooling medium.

  As shown in FIG. 2 in particular, the cooling medium introduction path 84 is formed along the central axis inside a support shaft 6 (hereinafter, this support shaft is referred to as 6A) provided at one end of the induction heating mechanism 3. It is comprised by the hollow part 61 made. Specifically, the hollow portion 61 is a space having a substantially cylindrical shape formed coaxially with the central axis of the support shaft 6A.

  The hollow portion 61 is opened at the outer end surface of the support shaft 6A, and the discharge port 81s of the mist generating device 81 is attached to the opening portion so as to face the hollow portion 61. Specifically, the discharge port 81 s of the mist generating device 81 is attached on the central axis of the hollow portion 61. In this way, the mist generating device 81 is provided at a position where it can be easily attached to and detached from the induction heat roller device 100 when there is a malfunction such as clogging. In addition, the opening part of the hollow part 61 and the mist production | generation apparatus 81 are attached so that attachment or detachment is possible via the seal structure (not shown).

  The hollow portion 61 communicates with the gap portion X through a plurality of through holes 61H at the base end portion (end portion on the induction heating mechanism 3 side) of the support shaft 6A. The through hole 61H forms an opening on the downstream side of the cooling medium introduction path 84. The through holes 61H are arranged at the upstream end of the gap X in the axial direction (the gap X2 in this embodiment), and are formed at equal intervals in the radial direction on the support shaft 6A. With this configuration, the mist-like cooling medium exiting from the downstream opening (through hole 61H) is introduced along the radial direction at the axially upstream end of the gap X. Specifically, the mist-like cooling medium is formed by the inner surface of the journal 41 provided at both ends of the roller body 2 and the axially upstream end surface 3X of the induction heating mechanism 3 in the gap portion X. It is introduced along the radial direction into the substantially annular gap X2.

  The cooling medium discharge path 85 is configured by a cooling medium discharge pipe 85T provided along the inside of a support shaft 6 (hereinafter, this support shaft is referred to as 6B) provided at the other end of the induction heating mechanism 3. ing. The cooling medium discharge pipe 85T is provided by being inserted into a hollow portion 62 formed along the central axis inside the support shaft 6B, and is provided at the base end portion (end portion on the induction heating mechanism 3 side) of the support shaft 6B. , The opening is directed toward the gap X, and the opening is the upstream opening of the cooling medium discharge path 85. And this upstream opening is arrange | positioned in the axial direction downstream end part (gap X2 in this embodiment) of the clearance gap X. As shown in FIG. In addition, the lead wire L2 connected to the induction coil 32 described above is also provided in the hollow portion 62 of the support shaft 6B.

  Further, a decompression device 9 for decompressing the gap X is provided on the cooling medium discharge pipe 85T outside the support shaft 6B. The decompression device 9 decompresses the inside of the gap X by sucking the air upstream of the cooling medium discharge pipe 85T and discharging it to the outside. As a result, the gap X is depressurized, the mist-like cooling medium introduced into the gap X is easily evaporated, the roller body 2 is easily cooled, and the vaporized cooling medium is contained in the roller body 2. It is possible to prevent condensation on the peripheral wall and the induction heating mechanism 3. Further, the decompression device 9 is configured so that the mist-like cooling medium passes through the gap X at a predetermined flow rate. Specifically, by setting the flow rate of the mist-like cooling medium in the gap X to 0.3 m / s or higher, high thermal conductivity can be obtained, and the cooling efficiency of the roller body can be greatly structured. it can.

  Further, since the mist-like cooling medium is supplied to the gap portion X as described above, the surface of the member forming the gap portion X, specifically, the inner peripheral wall surface of the roller body 2, the inner surface of the journal 41, and the support shaft 6 Rust prevention treatment is applied to the outer peripheral surface. In addition, a waterproof film F is provided on the outer peripheral surface of the induction heat generating mechanism 3 over substantially the entire surface in order to prevent electrical failure due to the cooling medium. This waterproof film F is necessary when there is a concern about condensation due to the relationship between the dew point temperature determined by the mist concentration inside the roller body 2 and the induction heating mechanism 3 during the cooling operation. If the temperature is clearly above the dew point temperature, it can be omitted.

  By introducing the mist-like cooling medium into the roller main body 2 by such a cooling mechanism 8, the latent heat of vaporization and the mist-like heat generated when the mist-like cooling medium contacts the inner peripheral wall of the roller main body 2 and evaporates. The roller body 2 or the induction heating mechanism 3 can be cooled by the sensible heat when the temperature of the cooling medium rises in the roller body 2 and the latent heat when it evaporates and evaporates. Then, the mist-like cooling medium is introduced from the axial end of the gap portion X formed between the roller body 2 and the induction heat generating mechanism 3 and is cooled from the axial end of the gap portion X. By discharging the medium to the outside of the roller body 2, the mist-like cooling medium can be spread over the entire gap X. Moreover, since the mist-like cooling medium is used, the cooling medium in contact with the roller body 2 can be reduced, and corrosion of the inner wall of the roller body 2 and accumulation of impurities can be suppressed. For example, when the temperature of the roller body 2 of the induction heating roller device is naturally cooled from 200 ° C. to 150 ° C., it takes about 30 minutes. By using this cooling mechanism 8, the temperature of the roller body 2 is changed from 200 ° C. to 150 ° C. The cooling time can be reduced to about 10 minutes.

  Thus, the induction heating roller device 100 of the present embodiment is configured so that the mist-like cooling medium flowing along the radial direction from the downstream opening (through hole 61H) to the upstream end portion in the axial direction of the gap portion X is transferred to the gap portion. A guide portion G for guiding the X in the axial direction downstream side is provided.

  As shown in FIGS. 2 and 3, the guide portion G opposes the downstream opening (through hole 61H) at the axial end portion of the gap portion X (specifically, the connecting portion of the gap X1 and the gap X2). And an annular plate having a substantially curved cross section provided on the entire circumference of the end portion in the axial direction of the gap X.

  The guide portion G is fixed to the inner surface of the journal 41 provided at the upstream end of the roller body 2. At this time, the guide part G is fixed by a fixing member T made of a material having excellent heat insulating properties. In order to increase the thermal separation effect between the journal 41 and the guide part G, a plurality of fixing members T are provided between the guide part G and the journal 41, and the guide part G and the journal 41 are partially connected. It is connected. Further, the plurality of fixing members T are arranged at equal intervals in the circumferential direction with respect to the guide portion G. The fixing member T may have an annular shape, and the guide portion G and the journal 41 may be fixed over the entire circumferential direction.

  Furthermore, the guide part G is provided on the inner peripheral surface of the roller body 2 with a heat insulating layer interposed. In this embodiment, the guide part G is provided separately from the inner peripheral surface of the roller body 2. Therefore, the air layer AS is interposed as a heat insulating layer. Thus, by providing the air layer AS between the guide part G and the inner peripheral surface of the roller body 2, the roller body 2 is less likely to be affected by heat due to the temperature of the guide part G. Thus, the guide part G is arrange | positioned so that it may not contact except the fixing member T. FIG.

  In addition, the downstream end G1 of the guide part G is positioned substantially at the same position as the upstream end face 3X of the induction heating mechanism 3 (cylindrical iron core 31) in the axial direction or on the downstream side in the axial direction. It is configured. As a result, the guide portion G can receive substantially all of the mist-like cooling medium flowing in the radial direction through the gap X2 and change its direction in the axial direction. This prevents the cooling medium from directly colliding.

<Effect of this embodiment>
According to the induction heating roller device 100 according to the present embodiment configured as described above, the cooling medium flowing in the radial direction from the downstream side opening (through hole 61H) of the cooling medium introduction path 84 is guided by the guide portion G and the axis of the gap portion X. By guiding to the downstream side in the direction, droplet formation caused by the collision of the mist-like cooling medium with the inner surface of the upstream end portion in the axial direction of the roller body 2 can be prevented. As a result, it is possible to prevent the axially upstream end of the roller body 2 from being overcooled locally. Further, by making the flow of the mist-like cooling medium easy to change from the radial direction to the axial direction by the guide portion G, the mist-like cooling medium can be efficiently changed in the axial direction of the gap portion X. It is possible to easily spread the entire X.

<Other modified embodiments>
The present invention is not limited to the above embodiment.

  The guide portion G of the embodiment is an annular plate having a substantially curved cross section, but may be an annular plate having a partial conical shape as shown in FIG.

  Further, the guide portion G of the above embodiment is configured to be fixed to the journal 41 by a fixing member T separate from the journal 41 and the guide portion G. In addition, as shown in FIG. A fixing protrusion 41T may be formed on the inner surface of the journal 41, and the guide part G may be fixed to the protrusion 41T. Further, although not shown, a fixing protrusion may be formed on the guide portion, and the protrusion may be fixed to the inner surface of the journal. Note that the journal and the guide portion may be fixed without forming the protrusion. At this time, it is desirable to make the contact area between the journal and the guide portion as small as possible.

  Furthermore, in the said embodiment, although the guide part was fixed to the journal inner surface, you may comprise so that a guide part may be fixed to the inner peripheral surface of a roller main body.

  In addition, the guide portion is separate from the journal and the roller body, but the guide portion may be integrated with the journal or the roller body by integral molding.

  In addition, the guide portion is not limited to the annular plate, and any member other than the plate may be used as long as it has a curved or partially conical guide surface that converts the radial flow of the mist-like cooling medium into the axial flow. It can also be configured.

  In the above-described embodiment, a cooling mechanism is provided on one end side of the journal, and a rotary transformer is provided on the other end side. When a rotary drive mechanism is attached to one end of the journal, the configuration becomes complicated and application becomes difficult. It is possible. In this case, it is desirable to provide the cooling mechanism at the same end as the side where the rotary transformer is equipped.

  In the above-described embodiment, the dual-support induction heating roller device has been described. However, the invention can also be applied to an induction heating roller device that supports only one of the journals at two points in a freely rotatable manner. Furthermore, the present invention can be applied to a so-called cantilever induction heating roller device.

  In addition, in the embodiment, the mist-like cooling medium is introduced from one axial end of the gap and discharged from the other axial end, but is introduced from the axial one end of the gap. And you may make it discharge | emit from the same axial direction one end part.

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

DESCRIPTION OF SYMBOLS 100 ... Induction heating roller apparatus 2 ... Roller main body 3 ... Induction heating mechanism X ... Gap part 6 ... Support shaft 8 ... Cooling mechanism 81 ... Mist production | generation apparatus 84 ... Cooling medium introduction path

Claims (5)

A roller body rotatably supported;
An induction heating mechanism that is disposed inside the roller body and causes the roller body to generate heat;
The mist-like cooling medium is introduced from the axial end of the gap portion formed between the roller main body and the induction heating mechanism, and the cooling medium is roller-rolled from the axial end of the gap portion. With a cooling mechanism that discharges outside the body,
The cooling mechanism is formed inside a mist generating device that generates a mist-like cooling medium, and a support shaft extending from both ends of the induction heating mechanism, and a downstream opening is opened on an outer peripheral surface of the support shaft. And a cooling medium introduction path for introducing the mist-like cooling medium from the mist generating device along the radial direction into the axial end of the gap,
Provided at the axial end of the gap portion, and includes a guide portion that guides the mist-like cooling medium flowing along the radial direction from the downstream opening to the downstream side in the axial direction of the gap portion ,
An induction heating roller device in which the mist generating device is detachably provided on a support provided at one end of the induction heating mechanism .   The induction heating roller device according to claim 1, wherein the guide portion is provided on an inner peripheral surface of the roller body with a heat insulating layer interposed.   The induction heating roller device according to claim 1 or 2, wherein the guide portion is fixed to an inner surface of a journal provided at both end portions of the roller body, and is provided apart from an inner peripheral surface of the roller body.   The induction heating roller device according to claim 1, 2 or 3, wherein the guide portion is fixed to a member forming an axial end portion of the gap portion by a fixing member having heat insulation properties. The induction heating roller device according to claim 1, wherein the guide portion is provided on an entire circumference of an end portion in the axial direction of the gap portion.