JPH0718160Y2 - Induction heating roller device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an induction heating roller device.

(Prior Art) In this type of device, an induction heating mechanism including an iron core and an induction coil wound around the iron core is provided inside a rotatable roller, and the induction heating mechanism is supported by a hollow support rod. It is already well known that the support rod is arranged along the rotation center axis of the roller and the electric wire connected to the induction coil is inserted into the support rod and led out to the outside.

Conventionally, the end of the induction coil is used as a crossover wire, and this is led out to the outside through the support rod as it is, and the end of the crossover wire is connected to the terminal block. I am trying to connect to. The connection is performed by crimping using a sleeve or fixing by welding.

(Problems to be solved by the invention) In this type of roller device, a slip ring used as a temperature detecting mechanism of the roller or a rotary transformer may be installed on the outer periphery of the support rod. Further, in order to make the drive shaft rotatable with respect to the support rod, an internal bearing may be installed between the outer periphery of the support rod and the inner surface of the drive shaft.

However, in the past, the crossover wire and the flexible lead wire were sleeves and were fixedly connected by welding.Therefore, when replacing the slip ring, rotary transformer, or internal bearing, do not remove these from the tip of the support rod. Was extremely troublesome. Further, as the current capacity of the induction coil increases with the increase in size of the roller, a thick crossover wire must be used accordingly.

Correspondingly, a support rod with a large inner diameter is required to be inserted, but if the outer diameter of the drive shaft through which the support rod is inserted is predetermined, then the hollow inner diameter of the support rod Is restricted. Therefore, it may happen that the required current capacity cannot be met.

Not only when the current capacity increases as described above,
Although the flexible lead wire must also be thick,
If such a thick one is used, it will be troublesome to handle, even if it is flexible, and it will be troublesome to connect, disconnect, transport, or package the crossover wire, and at the same time, damage it to prevent insulation. It may cause an accident.

This invention makes it easy to replace the slip ring and the like with the connecting configuration of the crossover wire led out to the outside through the inside of the support rod and avoiding damage to the lead wire. It is also an object of the present invention to simplify the configuration of the crossover even when the current capacity is large.

(Means for Solving Problems) This invention is a connector in which a crossover wire whose inner end is connected to an induction coil is inserted into a support rod and led out to the outside, and a lead wire is attached to its outer end. Is a detachable connection.

The crossover wire is formed of a coaxial multi-layer conductor, and a lead wire is connected to the outer end of the crossover wire.

(Operation) The inner end of the crossover is connected to the induction coil, and the outer end is connected to the lead. Since the outer diameter of the crossover wire is smaller than the outer diameter of the support rod, and the lead wire is detachable, it is easy to remove the lead wire from the support rod such as a slip ring when the lead wire is detached. Also, the flexible leads are not damaged during packaging and transportation.

Since the crossover is a coaxial multi-layer conductor, its cross-sectional shape is circular. The space of the hollow hole of the support rod can be utilized to the maximum extent as compared with the conventional case where the electric wires independent from each other are used. Thereby, it becomes easy to cope with a large current capacity.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 is a roller, and a drive shaft 2 is fixedly connected to both ends of the roller with bolts 3. The drive shaft 2 is rotatably supported by the frame 5 via a bearing 4, and an external drive source such as a motor 6 is provided.
Is rotated by.

An induction heating mechanism 8 is installed inside the roller 1. The induction heating mechanism 8 is composed of an iron core 9 and an induction coil 10 wound around the iron core 9. These are holders
It is held by 11, and hollow support rods 12 are connected to both ends of this holder 11 by bolts 13.

The support rod 12 is arranged along the center axis of rotation of the roller 1, is inserted through the inside of the drive shaft 2, and the drive shaft 2
On the other hand, it is rotatable by an internal bearing 14. A rotary transformer 15 used for detecting the temperature of the roller 1 is installed on the outer periphery of the support rod 12.

The above-mentioned structure is not particularly different from the ordinary roller device of this kind. A crossover 16 is inserted into the inside of the support roller 12, but according to the present invention, the crossover 16 is formed of a coaxial multi-layer conductor.

Specifically, as shown in FIG. 2, a conductor 17 serving as the center and an insulator (eg, an insulating tube) 18 for insulating the outer circumference thereof
, Another conductor 19 provided so as to surround the outer periphery thereof, and an insulator (eg, an insulating tube) 20 for insulating the outer periphery thereof.

Both ends of the conductors 17 and 19 are exposed, and the conductors 17 and 19 are formed in a coaxial two-step shape, and the exposed portions of the outer ends thereof are terminal portions 21 and 22.
The cross section of the crossover 16 is circular, and the outer diameter dimension thereof is smaller than the inner diameter of the support rod 12.

The end portions 23 of the induction coil 10 are connected to the exposed conductors 17 and 19 at the inner ends of the crossovers 16. Further, clamp-shaped connecting tools 24, 25 are detachably attached to the terminal portions 21, 22 at the outer ends thereof.

Specifically, as shown in FIG. 3, the connector has an annular portion 26 into which the terminal portion is inserted. Bolt in its inserted state
Tighten and fix 27. When removing this bolt 27
Just loosen.

A flexible lead wire 28 is connected to the annular portion 26. The flexible lead 28 is used by being connected to a power source 29.

The crossover 16 is fixed to the support rod 12 by the insulating bush 30 while being inserted into the support rod 12.

In the above configuration, the induction coil 8 is connected to the power supply 29 via the end portion 23 thereof, the conductors 17 and 19 of the transition portion 16 and the flexible lead wire 28. This causes the induction coil to be excited by the power supply 29.

When the induction coil has a three-phase configuration, the connecting wire 16 may have a coaxial configuration using a three-layer conduit, and similarly, the terminal portion may have a coaxial three-stage configuration.

(Effect of the Invention) Since the present invention is configured as described above, it has the following effects.

When replacing the inner bearing 14, the rotary transformer 15, etc., the bolt 27 is loosened, and the connectors 24, 25 are removed from the conductors 17, 19. Since the conductors 17 and 19 have a smaller outer diameter than the support rod 12, the inner bearing 14 and the like can be easily removed from the outer periphery of the support rod 12.

Also in the case of transportation, packing, etc., the connection tools 24, 25 are removed from the conductors 17, 19 as described above. This also avoids damage to the flexible lead wire and insulation failure.

Since the crossover 16 has a multi-layer coaxial structure, its cross-sectional shape is circular. Therefore, when inserting the crossover wire 16 into the support rod 12 in which the cross-sectional shape of the inner hollow hole is circular,
The space of the hollow hole can be utilized to the maximum extent. Therefore, even if the current capacity is large, the support pipe
It is not necessary to use the one with a very large inner diameter as 12.

[Brief description of drawings]

1 is a sectional view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of a part of FIG. 1, and FIG. 3 is a sectional view taken along line XX of FIG. DESCRIPTION OF SYMBOLS 1 ... Roller, 2 ... Drive shaft, 8 ... Induction heating mechanism, 9 ... Iron core, 10 ... Induction coil, 12 ... Support rod, 16 ... Crossover wire, 1
7, 19 ... Conductor, 21, 22 ... Terminal part, 24, 25 ... Connection tool, 28 ... Flexible lead wire,

Claims (1)

[Scope of utility model registration request] 1. A roller which is rotatable, an induction heating mechanism installed inside the roller, and a hollow which is arranged along a central axis of rotation of the roller and supports the induction heating mechanism. Support rod, an inner bearing that rotatably supports the support rod with respect to the drive shaft of the roller, and an induction coil of the induction heating mechanism, and the inner end is inserted into the support rod, and the outer end is supported by the support rod. Derived to the outside from the end of the rod, consisting of a coaxial multilayer conductor, a cross-section wire having a circular cross section, and a terminal portion consisting of an exposed portion of the conductor of each layer of the cross-section wire at the outer end of the cross-section wire,
A clamp-shaped connector having a ring-shaped portion through which each of the terminal portions of the conductor of each layer is inserted and a bolt that removably tightens each of the terminal portions that are inserted into the annular portion, and is connected to the connector. Induction heat generating roller device including an external lead wire.