JP6881730B2 - Induction heating roller device - Google Patents

Description

The present invention relates to an induction heating roller device.

Conventionally, for example, in a continuous heat treatment step of 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, the induction is performed inside a rotating roller body. An induction heating roller device is used in which a heat generating mechanism is arranged and the peripheral wall portion of the roller body is heated by an induced current.

In this induction heating roller device, as shown in Patent Document 1, a support member for supporting the induction heat generation mechanism is provided inside the roller body, and the support member is supported by the roller body via a rolling bearing. Specifically, a rolling bearing is provided between the outer peripheral surface of the support member and the inner peripheral surface of the journal portion of the roller body.

However, there is a problem that the induction heating mechanism and / or the support member is bent by its own weight due to a change with time due to exposure to a high temperature. In particular, in the case of a roller body having a small diameter and a long length, the induction heating mechanism and / or the support member is likely to be bent and deformed with time. When the induction heat generation mechanism and / or the support member is bent, the induction heat generation mechanism and / or the support member comes into contact with the inner peripheral surface of the roller body, causing a ground fault, or the induction heat generation mechanism is the roller body. The lead wire of the induction coil is broken due to the rotation with the coil, which makes it impossible to operate.

Japanese Unexamined Patent Publication No. 2000-277245

Therefore, the present invention has been made to solve the above problems, and its main problem is to suppress bending deformation (for example, creep deformation due to heat) due to its own weight of the induction heating mechanism and / or the support member with time. Is what you do.

That is, the induction heating roller device according to the present invention supports a hollow roller body rotatably supported and an induction heating mechanism having at least an induction coil, and a support member provided across both ends in the axial direction in the hollow. The support member is provided with a reciprocating rotation mechanism that reciprocates the support member within a predetermined angle range.

In such a case, since the support member is reciprocated within a predetermined angle range by the reciprocating rotation mechanism, the induction heat generation mechanism and / or the support member's own weight is applied to a specific part, resulting in deformation over time. Deformation can be suppressed. Therefore, it is possible to prevent the induction heat generation mechanism or the support member from coming into contact with the inner peripheral surface of the roller body, and the lead wire of the induction coil is broken due to the occurrence of a ground fault or the co-rotation of the induction heat generation mechanism and the roller body. Can be prevented. Further, since the support member is reciprocally rotated within a predetermined angle range, the amount of twist applied to the lead wire extending to the outside from the induction heating mechanism can be kept within the predetermined range, and damage or breakage of the lead wire can be prevented. be able to.

As a specific embodiment of the reciprocating mechanism, the reciprocating rotation mechanism includes a rack and pinion composed of a gear provided on the support member side and a rack that meshes with the gear, and a reciprocating drive unit that reciprocates the rack. It is conceivable to have.

As a specific embodiment of the reciprocating drive unit, the reciprocating drive unit is interposed between a motor provided outside the roller body and the motor and the rack, and reciprocates the rotation of the motor in a straight line. It is desirable to have a slider crank that translates into motion. With the configuration using the slider crank as described above, a unidirectional rotation motor can be used as the motor to be used, and the control of the reciprocating straight motion of the rack can be simplified.

When the support member is supported by the roller body via a bearing, the induction heating mechanism may rotate together with the roller body due to a failure or deterioration of the bearing. In order to prevent co-rotation by detecting bearing failure or deterioration, the induction heating roller device uses a load detection unit that detects the load in the reciprocating drive unit and a load obtained by the load detection unit. It is desirable to further include an abnormality determination unit for determining an abnormality of the bearing when the value is equal to or more than a predetermined value.

When the reciprocating drive unit has a motor, the load detection unit can detect the failure or deterioration of the bearing by detecting the current flowing through the motor. Specifically, it is desirable that the abnormality determining unit determines an abnormality of the bearing when the current detected by the load detecting unit is equal to or higher than a predetermined value.

In order to disperse and apply its own weight to the entire circumferential direction of the induction heating mechanism and the support member, it is desirable that the predetermined angle range in the reciprocating rotation is 180 degrees or more. If the angle range is 180 degrees or more, the weight is dispersed in the entire circumferential direction, but if the angle range is too large, the amount of twist applied to the lead wire extending to the outside from the induction heating mechanism is excessive. It grows big. Therefore, the angle range is considered to be 360 degrees or less, for example, although it depends on the length and strength of the lead wire.

In order to ensure that the weights of the induction heating mechanism and the support member are evenly applied within a predetermined angle range, it is desirable that the reciprocating rotation mechanism continuously reciprocates the support member. It is conceivable that this continuous reciprocating rotation continuously reciprocates while the induction heating roller device is in operation (specifically, while the roller body is rotating).

In order to reduce the electric power for reciprocating the support member, it is desirable that the reciprocating rotation mechanism intermittently reciprocates the support member. In this case, it may be reciprocated for a predetermined time at a predetermined time interval, or may be reciprocated for a predetermined time when there is a predetermined trigger (for example, input from an operator).

According to the present invention configured as described above, since the support member is reciprocated within a predetermined angle range, it is possible to suppress the bending of the induction heating mechanism and / or the support member due to its own weight due to aging.

It is a figure which shows typically the structure of the induction heating roller apparatus of this embodiment. It is a figure which shows typically the structure of the reciprocating rotation mechanism of the same embodiment. It is a schematic diagram which shows the reciprocating rotary motion of the roller main body of the same embodiment. It is a figure which shows typically the structure of the induction heating roller apparatus of a modification embodiment.

An embodiment of the induction heating roller device according to the present invention will be described below with reference to the drawings.

<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, the induction heating roller device 100 includes a hollow cylindrical roller body 2 rotatably supported, an induction heating mechanism 3 provided in the hollow of the roller body 2, and the induction. It is provided with a support member 4 that supports the heat generating mechanism 3 and is provided over both ends in the axial direction in the hollow.

The roller main body 2 has a cylindrical shell portion 21 and a pair of journal portions 22 provided at both ends of the shell portion 21. The journal portion 22 has a flange portion 221 that covers the end opening of the shell portion 21 and a hollow drive shaft 222 integrally formed with the flange portion 221. Further, the drive shaft 222 is rotatably supported by the machine base 62 via a bearing 61 such as a rolling bearing. The roller body 2 is configured to be rotated by a driving force externally given by, for example, a motor or the like.

The induction heating mechanism 3 induces heat generation of the shell portion 21 of the roller body 2, and is composed of 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. It is configured. Then, the support member 4 extends along the axial direction from each of both ends of the cylindrical iron core 31.

The support member 4 has a shaft shape that supports the induction heating mechanism 3, and is inserted into the drive shaft 222 of each of the roller main bodies 2. The support member 4 is arranged coaxially with the rotation axis C of the roller main body 2. The support member 4 is rotatably supported with respect to the drive shaft 222 by a bearing 5 such as a rolling bearing.

As a result, the induction heating mechanism 3 is supported inside the roller main body 2 in a suspended state, and is held regardless of the rotation of the roller main body 2. A lead wire 33 is connected to the induction coil 32, and the lead wire 33 extends to the outside through the inside of the support member 4. An AC power supply (not shown) for applying an AC voltage is connected to the lead wire 33 via a power regulator (not shown).

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 shell portion 21 of the roller main body 2. An induced current is generated in the shell portion 21 by this passage, and the shell portion 21 generates Joule heat by the induced current.

Then, as shown in FIG. 2, the induction heating roller device 100 of the present embodiment reciprocates a reciprocating rotation mechanism that reciprocates the induction heating mechanism 3 and the support member 4 around the rotation shaft C of the roller body 2 within a predetermined angle range. 7 is provided.

The reciprocating rotation mechanism 7 is provided outside the roller main body 2, and reciprocates and linearly moves the rack and pinion 71 including the gear 711 provided on the support member 4 side and the rack 712 that meshes with the gear 711, and the rack 712. It has a reciprocating drive unit 72.

The gear 711 is provided in a portion of the support member 4 that extends outward from one drive shaft 222 of the roller body 2. A motor (not shown) for rotating the roller body 2 is connected to the other drive shaft 222 of the roller body 2.

The rack 712 is slidably provided by a guide member 73 that guides the movement of the rack 712. The guide member 73 moves the rack 712 while engaging with the gear 711.

The reciprocating drive unit 72 reciprocates and linearly moves the rack 712 along the guide member 73, and rotates by interposing between the motor 721 provided outside the roller main body 2 and the motor 721 and the rack 712. It has a slider crank 722 that converts motion into reciprocating linear motion, and one or more gears 723 (two gears 723a, 723b in this embodiment) that are interposed between the motor 721 and the slider crank 722.

The motor 721 of the present embodiment is a motor that rotates in one direction. The rotation of the motor 721 is controlled by a control device (not shown). A gear 723a is provided on the output shaft (shaft) 721s of the motor 721. A gear 723b meshes with the gear 723a.

The slider crank 722 includes a crank portion 722a that rotates together with a gear 723b that rotates by the rotation of the motor 721, a slider 722b that is connected to one end of the rack 712, and a link member 722c that connects the crank portion 722a and the slider 722b. Have. Reference numeral 722d is a guide that defines the moving direction of the slider 722b.

In the present embodiment, the other end of the rack 712 is provided with a moving range regulating mechanism 74 that regulates the moving range of the rack 712 so that the rack 712 does not come off the guide member 73. The movement range regulating mechanism 74 has a link arm 741 to which one end is connected to the other end of the rack 712, and a fixing portion 742 for fixing the other end of the link arm 741 to the stationary side. There is.

In this reciprocating rotation mechanism 7, when the motor 721 rotates in one direction, the slider crank 722 reciprocates and linearly moves the rack 712 within a predetermined range. Then, the gear 711 meshing with the rack 712 repeats clockwise rotation and counterclockwise rotation, and the support member 4 to which the gear 711 is connected reciprocates within a predetermined angle range. In the present embodiment, the angle range of the reciprocating rotation of the support member 4 by the reciprocating rotation mechanism 7 is set to be 180 degrees or more.

For example, when the angle range is set to 180 degrees, as shown in FIG. 3, it is located at the lower end of the induction heating mechanism 3 (support member 4) at the first folding position X that turns back from clockwise to counterclockwise. Assuming that the part is A, the part A of the induction heating mechanism 3 (support member 4) is located at the upper end of the induction heating mechanism 3 (support member 4) at the second folding position Y that turns back from counterclockwise to clockwise. become. In this way, the portion A of the induction heating mechanism 3 (support member 4) rotates and moves between the lower end and the upper end between the first folding position X and the second folding position Y.

Further, the induction heating roller device 100 of the present embodiment determines the abnormality of the bearing 5 when the load detected unit 8 for detecting the load in the reciprocating drive unit 72 and the load obtained by the load detecting unit 8 are equal to or more than a predetermined value. It further includes an abnormality determination unit 9.

Specifically, the load detection unit 8 detects the current flowing through the motor 721 as the load of the reciprocating drive unit 72, and is provided in the power supply circuit of the motor 721. Since the current flowing through the motor 721 increases as the rotational resistance increases due to the failure or deterioration of the bearing 5, the current flowing through the motor 721 can be used as a material for determining the failure or deterioration of the bearing 5.

Further, the abnormality determination unit 9 determines that the bearing 5 is abnormal when the motor current obtained by the load detection unit 8 becomes a predetermined value or more. Then, when the abnormality determination unit 9 determines that the abnormality is present, a notification means such as a display unit such as a display, a sounding unit such as a speaker, or a light emitting unit such as an LED provided in the induction heating roller device 100 or its control device. Notifies that it is abnormal.

Further, the control device of the reciprocating rotation mechanism 7 (the control device of the motor 721 in this embodiment) controls the reciprocating rotation mechanism 7 (motor 721) so that the support member 4 continuously reciprocates. Specifically, it is conceivable that the control device continuously reciprocates the support member 4 while the induction heating roller device 100 is in operation (specifically, while the roller body 2 is rotating). At this time, the reciprocating rotation cycle is longer than the rotation cycle of the roller body 2.
By continuously reciprocating in this way, the weights of the induction heating mechanism 3 and the support member 4 can be evenly applied within a predetermined angle range.

Further, the control device of the reciprocating rotation mechanism 7 (the control device of the motor 721 in the present embodiment) may control the reciprocating rotation mechanism 7 (motor 721) so that the support member 4 intermittently reciprocates. Specifically, the control device controls the support member 4 to intermittently perform a series of operations consisting of a plurality of reciprocating rotations, and the support member 4 intermittently rotates clockwise and counterclockwise. It is conceivable to control it so as to be performed. Further, in the intermittent reciprocating rotation, it is conceivable that the reciprocating rotation is performed at a predetermined time interval, or that the reciprocating rotation is performed when there is a predetermined trigger (for example, input from the operator). ..

<Effect of this embodiment>
According to the induction heating roller device 100 configured in this way, since the support member is reciprocated within a predetermined angle range by the reciprocating rotation mechanism 7, the weight of the induction heating mechanism 3 and / or the support member 4 is a specific portion. It is possible to suppress bending deformation over time (for example, creep deformation due to heat) caused by being added to. Therefore, it is possible to prevent the induction heat generation mechanism 3 or the support member 4 from coming into contact with the inner peripheral surface of the roller body 2, and the induction coil 32 due to the occurrence of a ground fault or the co-rotation of the induction heat generation mechanism 3 and the roller body 2. It is possible to prevent the lead wire 33 of the above from being broken. Further, since the support member 4 is reciprocally rotated within a predetermined angle range, the amount of twist applied to the lead wire 33 extending to the outside from the induction heating mechanism 3 can be kept within the predetermined range, and the lead wire 33 can be damaged or damaged. Breakage can be prevented.

<Other modified embodiments>
The present invention is not limited to the above embodiment.
For example, the reciprocating drive unit of the above embodiment uses a motor and a slide crank as a configuration for reciprocating the rack, but other reciprocating drive units may also use a motor and a ball screw to reciprocate the rack. Alternatively, the rack may be reciprocated using an air cylinder.

Further, in addition to the configuration using the rack and pinion, the reciprocating rotation mechanism may be configured to reciprocate the support member 4 by using a motor 75 capable of forward and reverse rotation as shown in FIG. In this case, it is conceivable to provide a rotation transmission mechanism 76 using gears between the output shaft 75s of the motor 75 and the support member 4. The output shaft 75s of the motor 75 may be connected to the support member 4.

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 heat generation roller device 2 ・ ・ ・ Roller body 3 ・ ・ ・ Induction heat generation mechanism 4 ・ ・ ・ Support member 5 ・ ・ ・ Bearing 7 ・ ・ ・ Reciprocating rotation mechanism 71 ・ ・ ・ Rack and pinion 711 ・ ・ ・Gear 712 ・ ・ ・ Rack 72 ・ ・ ・ Reciprocating drive unit 721 ・ ・ ・ Motor 722 ・ ・ ・ Slider crank 8 ・ ・ ・ Load detection unit 9 ・ ・ ・ Abnormality judgment unit

Claims (9)

A hollow roller body that is rotatably supported and
A support member that supports an induction heating mechanism having at least an induction coil and is provided across both ends in the axial direction in the hollow.
An induction heating roller device including a reciprocating rotation mechanism that reciprocates the support member within a predetermined angle range separately from the roller body to suppress bending deformation due to the weight of the support member. The induction heating roller device according to claim 1, wherein the reciprocating rotation mechanism includes a rack and pinion including a gear provided on the support member side and a rack that meshes with the gear, and a reciprocating drive unit that reciprocates the rack. .. 2. The reciprocating drive unit has a motor provided outside the roller body and a slider crank that is interposed between the motor and the rack and converts the rotation of the motor into a reciprocating linear motion. The induction heating roller device according to the description. The support member is supported by a bearing with respect to the roller body.
A load detection unit that detects the load in the reciprocating drive unit and
The induction heating roller device according to claim 2 or 3, further comprising an abnormality determination unit for determining an abnormality of the bearing when the load obtained by the load detection unit is equal to or greater than a predetermined value. When the reciprocating drive unit has a motor, the load detection unit detects the current flowing through the motor.
The induction heating roller device according to claim 4, wherein the abnormality determination unit determines an abnormality of the bearing when the current detected by the load detection unit is equal to or higher than a predetermined value. The induction heating roller device according to any one of claims 1 to 5, wherein the predetermined angle range is 180 degrees or more. The induction heating roller device according to any one of claims 1 to 6, wherein the reciprocating rotation mechanism continuously reciprocates the support member. The induction heating roller device according to any one of claims 1 to 6, wherein the reciprocating rotation mechanism intermittently reciprocates the support member. A hollow roller body that is rotatably supported and
A support member that supports an induction heating mechanism having at least an induction coil and is provided across both ends in the axial direction in the hollow.
A reciprocating rotation mechanism for reciprocating the support member within a predetermined angle range is provided.
The reciprocating rotation mechanism is an induction heating roller device having a rack and pinion including a gear provided on the support member side and a rack that meshes with the gear, and a reciprocating drive unit that reciprocates the rack.

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