JPH0142319Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a high-frequency induction heating device, and more specifically, a high-frequency induction heating device that supplies high-frequency power and cooling water from an oscillator to an output transformer that moves a predetermined stroke. Regarding equipment.

Conventional technology As a conventional example of this type of high frequency induction heating device,
It consists of a power supply unit that boosts the voltage from a commercial frequency power supply and converts it into high-voltage DC, and an oscillator that receives the DC voltage obtained from this power supply unit and generates a predetermined high-frequency power. The high-frequency power obtained is supplied to the primary side of the output transformer via a flexible lead, the voltage is stepped down by this output transformer, and high-frequency, low-voltage, large current is passed through the work coil connected to the secondary side of this output transformer. It is done like this.

Further, a hose is connected between the oscillator and the output transformer and is arranged in parallel with the flexible lead for cooling water for the primary and secondary conductors of the output transformer and the work coil.

The output transformer is movable through a predetermined stroke, and the output transformer is moved to a desired workpiece position within this stroke and connected from the oscillator to the output transformer via the flexible lead. The work coil is energized to heat a workpiece located within the work coil.

Problems to be Solved by the Invention However, in the case of the above conventional example, the flexible lead between the oscillator and the output transformer is composed of a plurality of stacked copper strips, so as the output transformer moves, , a short-circuit accident between the flexible leads on the high-pressure side and the ground side, an accident where the point where the flexible lead is connected to the oscillator breaks due to repeated bending fatigue, and further damage caused by contact between the cooling water hose and the flexible lead. There is a risk of rupture, etc.
Particularly when the output transformer has a large stroke, the flexible leads will sag significantly, increasing the risk of the above-mentioned accident occurring. There is also a possibility of electric shock.

The present invention has been made in view of the above circumstances, and aims to provide a high frequency induction heating device that does not cause damage to the flexible leads due to movement of the output transformer of the high frequency induction heating device, and has less possibility of electric shock. The purpose is

Means for Solving the Problems In a high-frequency induction heating device that supplies high-frequency power and cooling water from an oscillator to an output transformer that moves over a predetermined stroke, a synthetic resin cable conveyor, a pair of flexible leads, and a pair of hoses, and the cable conveyor is provided such that one end is a fixed end and the other end is a moving end, and the moving end moves in parallel to the moving direction of the output transformer. , the flexible leads are separately provided along upper and lower supporter holes formed in the cable conveyor, and the front and back surfaces thereof are formed of synthetic resin sheets, and the synthetic resin sheets and a plurality of copper strips are formed on the front and back surfaces of the flexible leads. are stacked alternately, and one end is connected to an oscillator provided at the fixed end, and the other end is connected to an output transformer provided at the moving end, and the hose is provided along the cable conveyor. , one end is connected to the oscillator, and the other end is connected to the output transformer.

Function When appropriate, as the output transformer moves, the flexible lead and hose connected to the output transformer move together with the moving end of the cable conveyor, following the movement of the output transformer.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a partially cutaway schematic perspective view showing an embodiment of the present invention. The high-frequency induction heating device of the present invention includes an oscillator (not shown), an output transformer 1,
one cable conveyor 11, a pair of flexible leads 15, 15' and a pair of hoses 8,
8'. FIG. 1 also shows the power supply water connection arrangement between the oscillator and the output transformer.

A power supply section that converts a commercial frequency power source into a DC high voltage, and an oscillator (none of which are shown) that generates a predetermined high frequency power by receiving the DC high voltage obtained from this power supply section are arranged at predetermined positions. On the other hand, the output transformer 1 steps down the high frequency voltage obtained by the oscillator, and supplies power to the work coil as a high frequency, low voltage, large current.

This output transformer 1 is fixed on a table 2 that is movable within a predetermined stroke in the direction of the arrow, and moves to the position of a workpiece placed within a predetermined stroke, and is moved by a work coil 3. It is designed to heat the workpiece.
4 and 4' are copper tubes constituting conductors on the high voltage side and the ground side, and one end of this copper tube is connected to the output transformer 1.
The terminal of the primary coil is connected to a cooling water pipe (none of which is shown) on the primary side of the output transformer 1, and the other end is connected to a two-tier rack 20 fixed on the table 2. It is fixed to terminal plates 6, 6' arranged and fixed above and below through insulators 5, 5',
The tips thereof are connected to hoses 8, 8' made of flexible material via connecting fittings 7, 7'.

Reference numeral 11 denotes a single cable conveyor having a predetermined width and a predetermined length, which is made by connecting a large number of synthetic resin chain links. When the upper moving end corresponding to the tip of the fishhook moves horizontally and parallel to the moving direction of the output transformer 1 (in the direction of the arrow shown in the figure), the radius of curvature of the cable conveyor 11 is kept constant. It is configured to maintain the

FIG. 2 is a perspective view showing the shape of the members constituting the cable conveyor 11. As shown in FIG. In the figure, link plate 11a and link plate 11
b are connected by a pin 11c.

Also, one end surface 11 of this link plate 11a
d is configured to come into contact with a protrusion 11e formed on the outer wall of the link plate 11b when the cable conveyor 11 is not bent. Further, a notch 11f is formed on the inner wall of the link plate 11a, and a protrusion 11g is formed on one end surface of the link plate 11b, and the notch 11f and the protrusion 11g
are provided so as to face each other.

The shape of the notch 11f is the same as that of the protrusion 11g.
The protrusion 11g is formed so as to correspond to the rotation locus drawn by the tip of the cable conveyor 11, and when the cable conveyor 11 is not bent, the protrusion 11g is formed in the notch 11f.
It is designed to be locked by.

Therefore, although the cable conveyor 11 can be bent downward in the figure with respect to its longitudinal direction, the one end surface 11d and the protrusion 11e, as well as the cutout 11f and the protrusion 11g, Therefore, it is constructed so that it cannot be bent upward in the figure.

However, the opposing link plates 11
a, 11a and 11b, 11b are connected at their upper, middle, and lower portions by an upper supporter 11h, a middle supporter 11i, and a lower supporter 11j, and supporter holes 11k, 11l are formed at the top and bottom, respectively. There is. Furthermore, one end 11p of the upper supporter 11h is rotatable, and the other end is provided with a projection 1.
1q are attached to link plates 11a and 11b, respectively. However, the protrusion 11
By removing the supporter 11h from the link plates 11a and 11b, the supporter 11h can be rotated approximately 180 degrees around the one end 11p, and the supporter 11h can also be removed from the link plates 11a and 11b. .

Therefore, a moving metal fitting 13 is provided at the moving end of the cable conveyor 11, and a fixed fitting 1 is provided at the fixed end.
Flexible leads 15 and 15', which will be described later with reference to 4, are fixed to the top and bottom, respectively, and as shown in FIG.
Flexible leads 15, 15', which will be described later, are attached to upper and lower support holes 11k, 11l formed by i, 11j.
The cable conveyor 11 is laid in the longitudinal direction along the inner surface of the cable conveyor 11.

FIG. 3 shows a sectional view taken along the line AA in FIG.

15, 15' are a pair of flexible leads for the high voltage side and the ground side, and as shown in FIG. 4, the front and back sides are covered with heat-resistant synthetic resin sheets 15a, 15'a such as Teflon, and the inside is covered with copper strips 15b, 15'a.
15'b and the heat-resistant synthetic resin sheet 15a, 1
5'a are stacked alternately, and as mentioned above, the supporter holes 11 of the cable conveyor 11
Cable conveyor 11 along the inner surface of k, 11l
laid in the longitudinal direction. One end of the flexible lead 15, 15' is connected to the cable conveyor 1 by the upper and lower parts of the movable fitting 13.
As shown in FIG. 5, only the stacked copper strips 15b, 15'b are fixed to the terminal plates 6, 6' at their ends, as shown in FIG.

On the other hand, the other ends of the flexible leads 15, 15' are fixed to the cable conveyor 11 by the lower and upper parts of the fixing fittings 14, and their tips are only connected to the stacked copper strips 15b, 15' as described above. is connected to the oscillator through the terminal plates 16, 16'. This terminal board 1
The components for fixing 6, 16' to the base 12 include a two-stage rack 20'(20' is not shown), insulators 17, 1
7'(17' is not shown), and is similar to the above. . The sheets 15a, 15'a made of heat-resistant synthetic resin such as Teflon are used to maintain the insulation properties of the front and back surfaces of the flexible leads 15, 15', and to improve the sliding between the supports 11h, 11i, 11j and the copper strip. It is.

On the other hand, the connection fitting 7 on the primary side of the output transformer,
The other end of the pipe 8, 8' connected by 7' is
As shown in FIG. 1, the cable conveyor 11 is disposed along the longitudinal direction on the outer wall of the cable conveyor 11, and its tip is connected to pipes 19, 19' provided in the oscillator via connecting fittings 18, 18'. It is connected.

Next, the operation of the apparatus configured as described above will be explained.

In order to heat the workpiece placed within the travel stroke of the cable conveyor 11, the table 2 to which the output transformer 1 is fixed is moved and stopped at a desired position. Note that illustration and description of the transportation means will be omitted. At this time, the flexible leads 15, 15' connected via the terminal plates 6, 6' fixed to the table 2 move together with the table 2. However, the flexible lead 1
The cable conveyor 11 fixed to the flexible leads 15 and 15' by the moving metal fittings 13 has a fixed radius of curvature so that its moving end follows the table 2 and moves in the same direction. 15' will be guided together with the moving end of the cable conveyor 11. Hose 8, 8'
Since the same applies to the above, the explanation will be omitted.

When the table 2 stops at a desired position and a workpiece is inserted into the work coil 3, the high frequency high voltage current obtained by the oscillator is transmitted to the terminal plates 16, 16', the flexible leads 15, 15' ,
Electricity is supplied to the primary side of the output transformer 1 via the terminal plates 6, 6' and the copper tubes 4, 4'.

Cooling water supplied from the oscillator is supplied to the output transformer 1 via pipes 19, 19', connecting fittings 18, 18', hoses 8, 8', connecting fittings 7, 7', and copper pipes 4, 4'. Supplied to the primary side.

Effects of the invention As explained above, according to the invention, the high-voltage side and the ground side flexible leads are placed separately in the upper and lower support holes formed in a single cable conveyor whose one end moves following the moving output transformer. Also, since the cooling water hose is installed along the cable conveyor, the copper strip will not be subjected to excessive force due to the movement of the output transformer, so it will not be cut due to repeated bending of the copper strip, and the high voltage side and ground This has the advantage of eliminating short-circuit accidents of the side copper strips and damage to the hose due to contact between the hose and the copper strip.

Furthermore, since the front and back surfaces of the flexible lead are made of heat-resistant synthetic resin sheets such as Teflon, there are no exposed live parts in the moving parts, and therefore the possibility of electric shock is reduced.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway schematic perspective view showing an embodiment of the present invention. FIG. 2 is an external perspective view showing the constituent members of the cable conveyor. FIG. 3 is a sectional view of a cable conveyor on which flexible leads according to the present invention are installed. Figure 4 is a cross-sectional view of the flexible lead according to the present invention (B in Figure 1).
-B cross section). FIG. 5 is a schematic explanatory diagram showing how the flexible lead and pipe are attached to the terminal board. 1...Output transformer, 2...Table, 4,
4'...Copper tube, 6,6'...Terminal board, 8,8'...
Hose, 11... Cable conveyor, 12... Base, 15, 15'... Flexible lead, 1
5a, 15'a...Heat-resistant synthetic resin sheet, 15
b, 15'b...Copper band.

Claims (1)

[Scope of utility model registration request] A high-frequency induction heating device that supplies high-frequency power and cooling water from an oscillator to an output transformer that moves over a predetermined stroke, and includes a synthetic resin cable conveyor, a pair of flexible leads, and a pair of hoses. and the cable conveyor is provided such that one end is a fixed end and the other end is a moving end, and the moving end moves in parallel to the moving direction of the output transformer, and the flexible lead is connected to the cable conveyor. They are provided separately along the upper and lower support holes formed inside, and the front and back surfaces thereof are formed of synthetic resin sheets, and the synthetic resin sheets and a plurality of copper strips are alternately stacked, and One end is connected to an oscillator provided at the fixed end, and the other end is connected to an output transformer provided at the moving end, and the hose is provided along the cable conveyor, and one end is connected to the oscillator and A high frequency induction heating device characterized in that the other end is connected to the output transformer.