Induction heating roller device

Abstract

To ensure a necessary insulation area of a male connector in a supporting rod supporting an induction heating mechanism, and to make the contact of the male connector and a female connector certain, in a power supply connector supplying power to an induction coil of the induction heating mechanism.SOLUTION: An induction heating roller device is equipped with a cylindrical roller body 2, an induction heating mechanism 3 that is disposed in the roller body 2 and has an induction coil 32, a supporting rod 4 that supports the induction heating mechanism 3 and in which a lead wire part L1 of the induction coil 32, and a power supply connector 10 that connects the lead wire part L1 and an external power supply line L2 at an outer end portion of the supporting rod 4. The power supply connector 10 has a male connector 11 made of a conductor with a rectangular cross-section, and a female connector 12 that can be attached / detached to / from the male connector 11 and is made of a conductor having a pair of contacting surfaces 12a and 12b contacting with a pair of opposite surfaces 11a and 11b opposing to each other of the male connector 11.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an induction heating roller device. [Background technology]

[0002] This type of induction heating roller device has a rotatably supported roller body and an induction heating mechanism disposed inside the roller body. The induction heating mechanism has an induction coil, and lead wires extending from the induction coil pass through the inside of a support rod that supports the induction heating mechanism and are drawn out from the outer end of the support rod.

[0003] As shown in Patent Document 1, an induction heating roller device is considered to have a configuration in which a connector receptacle is provided at the outer end of the support rod, and the lead wire from the induction coil and the lead wire from the AC power supply are connected by inserting a plug into the receptacle. This configuration makes the induction heating roller device easier to handle. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3926700 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-mentioned induction heating roller device, no consideration is given to the specific structures of the receptacle and plug and the connection structure therebetween, and the device has not yet been put to practical use.

[0006] One possible solution is to make the male connector (connecting conductor) that makes up the receptacle at the outer end of the support rod circular in cross section. In this case, the female connector must contact the outer circumferential surface (curved surface) of the male connector. If the cross-sectional area of ​​the male connector is increased to match the electrical capacity of the induction heating roller device, the size of the female connector will increase throughout the entire circumferential direction, making it difficult to place within the limited space inside the support rod. It is also difficult to ensure that the female connector contacts the outer circumferential surface (curved surface) of the male connector.

[0007] The present invention has been made to solve the above problems, and provides a connector structure for an induction heating roller device that can be put into practical use. Specifically, the main objective of the present invention is to ensure reliable contact between the male and female connectors in a power supply connector that supplies power to the induction coil of an induction heating mechanism, while ensuring the necessary cross-sectional area of ​​the male connector within the support rod that supports the induction heating mechanism. [Means for solving the problem]

[0008] That is, the induction heating roller device of the present invention comprises a rotatably supported cylindrical roller body, an induction heating mechanism disposed inside the roller body and having an induction coil, a support rod that supports the induction heating mechanism and through which a lead wire portion of the induction coil is inserted, and a power supply connector at the outer end of the support rod that connects the lead wire portion and an external power supply line, wherein the power supply connector comprises a male connector made of a conductor having a rectangular cross section, and a female connector detachably connected to the male connector and made of a conductor having a pair of contact surfaces that come into contact with a pair of opposing surfaces of the male connector.

[0009] In this case, the male connector is made of a conductor having a rectangular cross section, and the female connector is made of a conductor that contacts a pair of opposing surfaces of the male connector, so that the cross-sectional area of ​​the male connector can be increased regardless of whether the male connector or the female connector is placed in the limited space within the support rod. Also, by configuring the pair of contact surfaces of the female connector to contact the pair of opposing surfaces of the male connector, they can be reliably contacted.

[0010] In a specific embodiment, it is desirable that the male connector is fixed to the outer end portion and connected to the lead wire portion, and the female connector is connected to the power supply line.

[0011] It is desirable that the male connector be provided inside the support rod and inward from the outer end surface of the support rod. With this configuration, the male connector does not get in the way during transportation or surface treatment work, and by protecting the male connector with the support rod, the risk of damage during handling can be avoided.

[0012] It is possible to form the male connector integrally with the lead wire portion of the induction coil, but there are also configurations in which the induction coil is wound with multiple coils in parallel, and when considering application to these configurations, it is desirable that the male connector be connected to the end of the lead wire portion by welding or crimping.

[0013] It is desirable that the induction heating roller device of the present invention further include a pressing mechanism that presses the pair of contact surfaces of the female connector against the pair of opposing surfaces of the male connector while the male connector and the female connector are connected. This configuration prevents poor contact between the male connector and the female connector, and also reduces contact resistance by bringing the male connector and female connector into contact with each other with high surface pressure, thereby suppressing heat generation on their conductive surfaces.

[0014] It is conceivable that the male connector is fixed to the inner peripheral surface of the support rod by a first insulator, and the female connector is built into a second insulator. In this configuration, it is desirable that the pressing mechanism be composed of a first tapered surface formed on the inner peripheral surface of the support rod and expanding in diameter toward the outer end surface, and a second tapered surface formed on the outer peripheral surface of the second insulator and fitting into the first tapered surface. With this configuration, simply fitting the second insulator into the support rod causes the support rod and the second insulator to fit together in a tapered manner, applying a radially inward force to the second insulator, pressing a pair of contact surfaces of the female connector against a pair of opposing surfaces of the male connector.

[0015] It is desirable that the tip of the female connector on the side that is coupled to the male connector be located more inward than the tip surface of the second insulator on the side that is coupled to the male connector. This configuration prevents a user from getting an electric shock when touching the female connector when it is disconnected from the male connector, and also ensures an insulation distance between adjacent female connectors and between the female connector and the support rod.

[0016] The second insulator preferably has slits communicating with the space between the pair of contact surfaces on both sides of the female connector in a direction perpendicular to the opposing direction of the pair of contact surfaces. With this configuration, when the second tapered surface is fitted to the first tapered surface, the second insulator is more likely to deform radially inward due to the slit portion, allowing the pair of contact surfaces of the female connector to be pressed against the pair of opposing surfaces of the male connector.

[0017] It is desirable that the second insulator has cutout portions on both sides of the female connector in a direction perpendicular to the opposing direction of the pair of contact surfaces, and that the cutout portions are formed by cutting out the outer peripheral surface of the second insulator along the opposing direction of the pair of contact surfaces from the tip surface of the second insulator on the side that is connected to the male connector to a predetermined position in the axial direction. By forming the cutout portions in this manner, the second insulator can be easily deformed radially inward by the slit portions, and the pair of contact surfaces of the female connector can be pressed against the pair of opposing surfaces of the male connector.

[0018] It is desirable that a nut that screws onto a male threaded portion formed on the outer peripheral surface of the support rod is rotatably provided on the outer peripheral surface of the second insulator, and that by tightening the nut onto the male threaded portion, the pressing mechanism presses the pair of contact surfaces of the female connector against the pair of opposing surfaces of the male connector. With this configuration, simply by tightening the nut to the male threaded portion, the pair of contact surfaces of the female connector can be reliably pressed against the pair of opposing surfaces of the male connector.

[0019] The second insulator preferably has a position restricting portion that restricts the axial position of the nut relative to the second insulator. This position restricting portion allows the second insulator to taper-fit onto the support rod when the nut is tightened onto the male thread, and allows the second insulator to disengage from the support rod when the nut is loosened from the male thread. This improves the ease of attachment and detachment of the female connector.

[0020] When the power supply connector supplies a single-phase AC voltage, the two male connectors may be arranged in parallel, and the two female connectors may be arranged corresponding to the two male connectors.

[0021] Furthermore, when the power supply connector supplies three-phase AC voltage, the three male connectors may be arranged in a parallel or triangular configuration, and the three female connectors may be arranged corresponding to the three male connectors.

[0022] As a specific connection mode between the female connector and the power line, it is desirable to connect a rod-shaped conductor to the rear end of the female connector, and to connect the power line to the rod-shaped conductor via a crimp-type connection sleeve. With this configuration, the female connector and the power line can be connected simply and compactly.

[0023] In order to more easily ensure insulation of the rod-shaped conductors connected to each of the multiple female connectors, it is desirable to shift the positions of the rod-shaped conductors connected to the rear ends of the female connectors in the axial direction between the multiple connectors.

[0024] In order to provide insulation and facilitate bundling of a plurality of power lines, it is desirable that the female connector, the crimp-type connection sleeve, and the power lines are covered with an insulating flexible heat-shrinkable tube.

[0025] It is desirable that the outer end of the support rod has a notch cut out along the axial direction from the outer end face, and that the lead wire of a temperature sensor for preventing excessive temperature rise of the induction coil is led out from the notch. With this configuration, the lead wires of the temperature sensor do not interfere with each other when the male connector and the female connector are connected or disconnected. [Effects of the Invention]

[0026] According to the present invention configured in this manner, in the power supply connector that supplies power to the induction coil of the induction heating mechanism, the necessary cross-sectional area of ​​the male connector can be ensured within the support rod that supports the induction heating mechanism, while ensuring reliable contact between the male connector and the female connector. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a cross-sectional view schematically illustrating the configuration of an induction heating roller device according to one embodiment of the present invention. [Figure 2] FIG. 2 is a front view of the power supply connector of the embodiment in a connected state. [Figure 3] FIG. 10 is a perspective view of the embodiment, seen from the opposite side to the roller body, with the power supply connector removed. [Figure 4] FIG. 2 is a perspective view of the embodiment, seen from the roller body side, with the power supply connector removed. [Figure 5] FIG. 2 is an enlarged cross-sectional view taken along line AA of the embodiment. [Figure 6] FIG. 2 is an enlarged cross-sectional view taken along line AA in the state where the power supply connector of the embodiment is removed. [Figure 7] 8 is a cross-sectional view taken along line BB in a state where the power supply connector of the embodiment is removed. FIG. [Figure 8] 4 is a partially enlarged cross-sectional view showing the connected state of the male connector and the female connector of the embodiment. FIG. [Figure 9] FIG. 10 is a perspective view showing a male connector according to a modified embodiment. [Figure 10] FIG. 10 is a perspective view showing a female connector for a modified liquid. DETAILED DESCRIPTION OF THE INVENTION

[0028] <One embodiment of the present invention> An embodiment of an induction heating roller device 100 according to the present invention will be described below with reference to the drawings.

[0029] Specifically, as shown in FIG. 1, this induction heating roller device 100 comprises a hollow cylindrical roller body 2 that is supported so as to be freely rotatable, an induction heating mechanism 3 provided within the hollow of the roller body 2, and a support rod 4 that supports the induction heating mechanism 3 and is provided within the hollow across both axial ends.

[0030] The roller 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 formed integrally with the flange portion 221. The drive shaft 222 is rotatably supported on a machine base 62 via a bearing 61 such as a rolling bearing. The roller body 2 is configured to rotate by a driving force applied externally by, for example, a motor.

[0031] The induction heating mechanism 3 generates heat by induction in 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. Support rods 4 extend axially from both ends of the cylindrical iron core 31.

[0032] The support rod 4 is cylindrical and supports the induction heating mechanism 3, and is inserted into each drive shaft 222 of the roller body 2. The support rod 4 is arranged coaxially with the rotation axis C of the roller body 2. The support rod 4 is supported rotatably relative to the drive shaft 222 by a bearing 5 such as a rolling bearing.

[0033] As a result, the induction heating mechanism 3 is supported in a suspended state inside the roller body 2 and is maintained regardless of the rotation of the roller body 2. A lead wire portion L1 is connected to the induction coil 32, and this lead wire portion L1 is inserted into the inside of the support rod 4 and connected to an external power supply line L2. A single-phase AC power supply (not shown) for applying AC voltage is connected to this external power supply line L2 via a power adjustment device (not shown).

[0034] When an AC voltage is applied to the induction coil 32 by this induction heating mechanism 3, an alternating magnetic flux is generated, and this alternating magnetic flux passes through the shell portion 21 of the roller body 2. This passage generates an induced current in the shell portion 21, and this induced current causes the shell portion 21 to generate Joule heat.

[0035] <Power supply connector 10> 1, the induction heating roller device 100 of this embodiment is provided with a power supply connector 10 that connects the lead wire portion L1 of the induction coil 32 and an external power supply line L2 at the outer end of one of the support rods 4. The power supply connector 10 of this embodiment is for use with a single-phase AC power supply.

[0036] As shown in FIGS. 2 to 8, the power supply connector 10 has a receptacle 10A having two male connectors 11 and a plug 10B having two female connectors 12 provided corresponding to the two male connectors 11.

[0037] 3 and 5 to 8, receptacle 10A has two male connectors 11 made of conductors with rectangular cross sections, and a first insulator 13 for fixing the two male connectors 11 inside the outer end of support rod 4. First insulator 13 fixes the two male connectors 11 to the inner circumferential surface of support rod 4 while keeping them spaced apart. First insulator 13 is fixed by an insulating pin P1 that passes through a hole that penetrates support rod 4, first insulator 13, and male connector 11.

[0038] Two male connectors 11 are provided inside support rod 4, more inward than outer end surface 4a of support rod 4 (see FIGS. 6 and 7). This prevents male connectors 11 from getting in the way when receptacle 10A is transported with plug 10B removed or when performing surface treatment work, and by protecting male connectors 11 with support rod 4, the risk of breakage during handling can be avoided.

[0039] The two male connectors 11 are arranged parallel to each other along the axial direction of the support rod 4, and each male connector 11 has a rectangular cross section perpendicular to the axial direction (see FIG. 8). The male connector 11 of this embodiment has a rectangular shape.

[0040] The portion of this male connector 11 that extends outward from the first insulator 13 (the opposite side from the roller body 2) is the portion that is connected to the female connector 12 (see FIG. 5). In addition, the lead wire portion L1 is connected to the end of the portion of the male connector 11 that extends inward from the first insulator 13 (toward the roller body 2) by welding or crimping. The male connector 11 may be formed integrally with the lead wire portion L1.

[0041] 4 to 8, plug 10B has two female connectors 12 that are detachably connected to male connector 11, and a second insulator 14 that houses and supports the two female connectors 12. Second insulator 14 supports two female connectors 12 spaced apart from each other so as to correspond to two male connectors 11. Second insulator 14 has a rectangular hole formed therein that has the same cross-sectional shape and dimensions as female connectors 12, and female connector 12 is fitted into this rectangular hole.

[0042] 6 and 8, the two female connectors 12 are made of conductors having a pair of contact surfaces 12a, 12b that come into contact with a pair of opposing opposing surfaces 11a, 11b of the male connector 11. As shown in Fig. 6, the female connector 12 of this embodiment has a roughly U-shaped tip on the side that is connected to the male connector 11 (the tip in the direction in which the male connector 11 is inserted), and the opposing inner surfaces of this U-shape form a pair of contact surfaces 12a, 12b.

[0043] The tip ends of the two female connectors 12 that are connected to the male connector 11 are located inside the tip surface 14a of the second insulator 14 that is connected to the male connector 11 (see FIG. 6, etc.). This prevents a user from receiving an electric shock when touching the female connector 12 when the female connector 12 is disconnected from the male connector 11. Furthermore, an insulation distance between adjacent female connectors 12 and an insulation distance between the female connectors 12 and the support rod 4 can be ensured.

[0044] An external power supply line L2 is connected to a portion (rear end) of this female connector 12 that extends outward from the second insulator 14 (opposite the side connected to the male connector 11) (see FIGS. 5 to 7).

[0045] <Connection structure of female connector 12 and power line L2> Specifically, as shown in FIGS. 5 to 7, a rod-shaped conductor 15 is connected to the rear end of the female connector 12, and an external power supply line L2 is connected to the rod-shaped conductor 15 via a crimp-type connection sleeve 16.

[0046] Here, the positions of the rod-shaped conductors 15 connected to the rear ends of the two female connectors 12 are shifted in the axial direction between them (see FIG. 5, etc.). Specifically, the rod-shaped conductor 15 connected to the rear end of one female connector 12 is positioned axially forward, and the rod-shaped conductor 15 connected to the rear end of the other female connector 12 is positioned axially rearward. To achieve this configuration, the lengths of the portions of the two female connectors 12 extending rearward from the second insulator 14 (the side opposite to the side connected to the male connector 11) are made different from each other.

[0047] Additionally, as shown in FIGS. 5 to 7, the rear end of the female connector 12, the rod-shaped conductor 15, the crimp-type connection sleeve 16 and parts of the two power lines L2 are covered with an insulating flexible heat-shrinkable tube 19.

[0048] <Pressing mechanism 17> 5 to 7, the power feed connector 10 of this embodiment further includes a pressing mechanism 17 that presses the pair of contact surfaces 12a, 12b of the female connector 12 against the pair of opposing surfaces 11a, 11b of the male connector 11 when the male connector 11 and the female connector 12 are connected. This pressing mechanism 17 prevents poor contact between the male connector 11 and the female connector 12, and also brings the male connector 11 and the female connector 12 into contact with each other with high surface pressure, reducing contact resistance and suppressing heat generation from their conductive surfaces.

[0049] Specifically, pressing mechanism 17 is formed on the inner circumferential surface of support rod 4, and is configured from a first tapered surface 171 that expands in diameter toward outer end surface 4a, and a second tapered surface 172 that is formed on the outer circumferential surface of second insulator 14 and fits into first tapered surface 171. With this configuration, simply fitting second insulator 14 into support rod 4 causes tapered fit between support rod 4 and second insulator 14, and a radially inward force acts on second insulator 14, pressing a pair of contact surfaces 12a, 12b of female connector 12 against a pair of opposing surfaces 11a, 11b of male connector 11.

[0050] Here, the first tapered surface 171 is formed on the inner circumferential surface of the support rod 4, axially outward of the first insulator 13.

[0051] As shown in Figures 4, 7 and 8, the second insulator 14 on which the second tapered surface 172 is formed has a slit portion 14S formed therein to make it easier for the pressing mechanism 17 to press the pair of contact surfaces 12a, 12b against the pair of opposing surfaces 11a, 11b.

[0052] The slits 14S are formed on both sides of each female connector 12 (upper and lower sides of each female connector 12) in a direction perpendicular to the opposing direction of the pair of contact surfaces 12a, 12b (the vertical direction in FIG. 8). That is, two slits 14S are formed for each female connector 12, and each slit 14S corresponds to the space between the pair of contact surfaces 12a, 12b and communicates with the space between the pair of contact surfaces 12a, 12b. Here, it is sufficient for each slit 14S to communicate with the space between the pair of contact surfaces 12a, 12b. In this embodiment, it is sufficient for each slit 14S to be within the width of the rectangular hole in the second insulator 14 that accommodates the female connector 12. Furthermore, each slit 14S is formed in a straight line with the space between the pair of contact surfaces 12a, 12b in a direction perpendicular to the opposing direction of the pair of contact surfaces 12a, 12b. Note that each slit 14S does not have to be in a straight line with the space between the pair of contact surfaces 12a, 12b.

[0053] Furthermore, as shown in Figures 4, 7 and 8, the second insulator 14 on which the second tapered surface 172 is formed has a notch portion 14K formed therein to make it easier for the second insulator 14 to deform due to the slit portion 14S.

[0054] The cutout portions 14K are formed on both sides of the female connector 12 (upper and lower sides of each female connector 12) in a direction perpendicular to the opposing direction of the pair of contact surfaces 12a, 12b. Specifically, the cutout portions 14K are formed by cutting out the outer peripheral surface of the second insulator 14 along the opposing direction of the pair of contact surfaces 12a, 12b from the tip surface 14a of the second insulator 14 on the side that is connected to the male connector 11 to a predetermined position in the axial direction. In other words, flat surfaces are formed on both sides of the outer peripheral surface of the second insulator 14, sandwiching the two female connectors 12. When the second insulator 14 is inserted into the outer end of the support rod 4, the cutout portions 14K form a space between the second insulator 14 and the first tapered surface 171, and the portion where the cutout portions 14K are not formed (the second tapered surface 172) fits into the first tapered surface 171. As a result, the second insulator 14 is deformed inward in the opposing direction of the pair of contact surfaces 12a, 12b as the first tapered surface 171 and the second tapered surface 172 engage with each other, and the pair of contact surfaces 12a, 12b are pressed against the pair of opposing surfaces 11a, 11b, thereby coming into close contact.

[0055] 2 to 7, a nut 18 is rotatably provided on the outer circumferential surface of the second insulator 14. The nut 18 is fastened to the male threaded portion 4M formed on the outer circumferential surface of the support rod 4. When the nut 18 is tightened onto the male threaded portion 4M, the pressing mechanism 17 presses the pair of contact surfaces 12a, 12b of the female connector 12 against the pair of opposing surfaces 11a, 11b of the male connector 11. Specifically, when the nut 18 is tightened onto the male threaded portion 4M, the female connector 12 is connected to the male connector 11, and the second tapered surface 172 of the second insulator 14 fits into the first tapered surface 171 of the support rod 4, and the pair of contact surfaces 12a, 12b of the female connector 12 presses against the pair of opposing surfaces 11a, 11b of the male connector 11.

[0056] 2 to 7, the second insulator 14 is provided with a position restricting portion 20 that restricts the axial position of the nut 18. When the nut 18 is tightened onto the male thread portion 4M by this position restricting portion 20, the second insulator 14 is tapered into the support rod 4, and when the nut 18 is loosened from the male thread portion 4M, the tapered fit of the second insulator 14 is released from the support rod 4. This improves the ease of attachment and detachment of the female connector 12.

[0057] Specifically, the position restriction portion 20 is composed of a step portion 20a provided on the second insulator 14 on the axial front side of the nut 18 (the side that is coupled to the male connector 11), and a protrusion 20b provided on the axial rear side of the nut 18 (the side opposite to the side that is coupled to the male connector 11). In this embodiment, the protrusion 20b is composed of an insulating pin P2 that passes through a hole that penetrates the second insulator 14 and the female connector 12. This insulating pin P2 fixes the second insulator 14 and the female connector 12. Note that the protrusion 20b may be composed of a step similar to the step portion 20a, in addition to the insulating pin P2.

[0058] The insulating pin P2 protrudes from the outer peripheral surface of the second insulator 14. In this embodiment, the insulating pin P2 protrudes from two opposing directions in the second insulator 14. Specifically, the insulating pin P2 protrudes outward beyond the innermost diameter portion of the nut 18. The insulating pin P2 is also located at a position where the rear end of the nut 18 abuts against the insulating pin P2 before the nut 18 is disengaged from the male thread portion 4M. With this configuration, when the nut 18 is loosened, the nut 18 abuts against the insulating pin P2, and when the nut 18 is subsequently loosened, the second insulator 14 and the female connector 12 are pulled out of the support rod 4 together with the insulating pin P2.

[0059] 3, a notch 4K is formed at the outer end of the support rod 4, cutting out the outer end surface 4a along the axial direction. This notch 4K extends axially further toward the roller body 2 than the male thread portion 4M. A lead wire L3 of a temperature sensor TS for preventing excessive temperature rise in the induction coil is led out from this notch 4K.

[0060] <Effects of this embodiment> With the induction heating roller device 100 configured in this manner, the male connector 11 is made of a conductor having a rectangular cross section, and the female connector 12 is made of a conductor that contacts the pair of opposing surfaces 11a, 11b of the male connector 11, so that the cross-sectional area of ​​the male connector 11 can be increased regardless of whether the male connector 11 or the female connector 12 is placed in the limited space within the support rod 4. Furthermore, by configuring the pair of contact surfaces 12a, 12b of the female connector 12 to contact the pair of opposing surfaces 11a, 11b of the male connector 11, they can be reliably contacted.

[0061] <Other embodiments> The present invention is not limited to the above-described embodiment, but may be modified as follows.

[0062] For example, in the above embodiment, the male connector 11 is fixed inside the support rod 4, and the female connector 12 is detachably connected to the male connector 11. However, the opposite configuration may also be used, that is, the female connector 12 is fixed inside the support rod 4, and the male connector 11 is detachably connected to the female connector 12.

[0063] Although the above embodiment is configured to receive power from a single-phase AC power supply, it may also be configured to receive power from a three-phase AC power supply. In this case, the external power supply lines L2 will be configured with three wires. Furthermore, the power supply connector will have three male and female connectors, one for each of the three phases, and they may be arranged in a triangular configuration along each side of a triangle, as shown in Figures 9 and 10, or they may be arranged in parallel, as in the above embodiment.

[0064] Furthermore, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications are possible without departing from the spirit of the present invention. [Explanation of symbols]

[0065] 100....Induction heating roller device 2 Roller body 3. Induction heating mechanism 32. Induction coil L1... Lead wire section L2...Power line 4. Support rod 4a...Outer end surface of support rod 4M... Male thread 4K...Notch TS···Temperature Sensor 10 Power supply connector 11 Male connector 11a, 11b: A pair of opposing surfaces 12 female connector 12a, 12b: A pair of contact surfaces 13. First insulator 14... Second insulator 14S...Slit section 14K···Notch 14a: End surface of the side that is connected to the male connector 15 Rod-shaped conductor 16···Crimp type connection sleeve 17. Pressing mechanism 171... First tapered surface 172...Second tapered surface 18···Nut 19 Insulation pin 20···Insulating flexible heat shrink tubing

Claims

1. a rotatably supported cylindrical roller body; an induction heating mechanism disposed inside the roller body and having an induction coil; a support rod that supports the induction heating mechanism and through which a lead wire portion of the induction coil is inserted; a power supply connector at an outer end of the support rod for connecting the lead wire portion and an external power supply line; The power supply connector is a male connector made of a conductor having a rectangular cross section; a female connector detachably connected to the male connector and made of a conductor having a pair of contact surfaces that come into contact with a pair of opposing surfaces of the male connector, the male connector is fixed to the inner circumferential surface of the support rod by a first insulator; The female connector is housed in a second insulator; a pressing mechanism configured to press the pair of contact surfaces of the female connector against the pair of opposing surfaces of the male connector when the male connector and the female connector are connected to each other; The pressing mechanism includes: a first tapered surface formed on an inner peripheral surface of the support rod and increasing in diameter toward an outer end surface; a second tapered surface formed on the outer peripheral surface of the second insulator and fitted into the first tapered surface.

2. the male connector is fixed to the outer end portion and connected to the lead wire portion; The induction heating roller device according to claim 1 , wherein the female connector is connected to the power supply line.

3. 3. The induction heating roller device according to claim 2, wherein the male connector is provided inside the support rod and further inward than the outer end surface of the support rod.

4. 4. The induction heating roller device according to claim 2, wherein the male connector is connected to an end of the lead wire portion by welding or crimping.

5. 5. The induction heating roller device according to claim 1, wherein a tip end of the female connector on the side connected to the male connector is located inside a tip end surface of the second insulator on the side connected to the male connector.

6. 6. The induction heating roller device according to claim 1, wherein the second insulator has slits that communicate with a space between the pair of contact surfaces on both sides of the female connector in a direction perpendicular to the opposing direction of the pair of contact surfaces.

7. the second insulator has notches on both sides of the female connector in a direction perpendicular to the opposing direction of the pair of contact surfaces, 7. The induction heating roller device according to claim 6, wherein the cutout portion is formed by cutting out an outer circumferential surface of the second insulator along the opposing direction of the pair of contact surfaces, from a tip end surface of the second insulator on the side that is connected to the male connector to a predetermined position in the axial direction.

8. a nut is rotatably provided on an outer peripheral surface of the second insulator to be fastened to a male thread portion formed on an outer peripheral surface of the support rod; 8. The induction heating roller device according to claim 1, wherein the pressing mechanism presses the pair of contact surfaces of the female connector against the pair of opposing surfaces of the male connector by tightening the nut against the male threaded portion.

9. 9. The induction heating roller device according to claim 8, wherein the second insulator is provided with a position restricting portion that restricts the axial position of the nut relative to the second insulator.

10. When the power supply connector supplies a single-phase AC voltage, the two male connectors are arranged in parallel, and the two female connectors are arranged corresponding to the two male connectors; 10. The induction heating roller device according to claim 1, wherein when the power supply connector supplies a three-phase AC voltage, the three male connectors are arranged in a parallel or triangular configuration, and the three female connectors are arranged corresponding to the three male connectors.

11. 11. The induction heating roller device according to claim 1, wherein a rod-shaped conductor is connected to a rear end of the female connector, and the power supply line is connected to the rod-shaped conductor via a crimp-type connecting sleeve.

12. 12. The induction heating roller device according to claim 11, wherein the positions of the rod-shaped conductors connected to the rear ends of the female connectors are shifted in the axial direction among a plurality of the rod-shaped conductors.

13. 13. The induction heating roller device according to claim 11, wherein a part of the female connector, the crimp-type connection sleeve, and a part of the power line are covered with an insulating flexible heat-shrinkable tube.

14. 14. The induction heating roller device according to claim 1, wherein the outer end of the support rod has a notch cut out from the outer end surface along the axial direction, and a lead wire of the temperature sensor is led out from the notch.

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