JPS6033590Y2 - Insulator for supporting heating wires - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an insulator for supporting heating wires, which is used to construct various types of heaters by supporting resistance heating wires mainly formed in a coil shape.

FIGS. 1 and 2 show an example of a so-called "bud heater" which is used to heat a required portion of a long or large object to be heated or used as a heater for various types of furnaces.

Conventionally, when constructing such a pad heater 1, as shown in FIG. 3, two heating wire insertion holes 2 are provided inside.
A plurality of insulators 3 having a radiation heating window 5 communicating with the hole 2 over the entire length of the surface 3A facing the object to be heated 6 are arranged so that the insulators 3 are alternated in adjacent rows. The resistance heating wires 4 are passed through the heating wire insertion holes 2 in a direction perpendicular to the rows of the insulators 3, and the insulators 3 are sewn together alternately to connect them.

By the way, in the above-mentioned insulator 3, in order to prevent the resistance heating wire 4 from escaping from the radiation heating window 5, the heating wire insertion hole 2 is
A neck-shaped heating wire escape prevention portion 7 is provided over the entire length of both windows 5, the width of which is smaller than the diameter of the resistance heating wire 4.

Therefore, in order to insert the heating wire 4 into each heating wire insertion hole 2,
It is necessary to insert the heating wire 4 from the length direction of the hole 2, and if the heating wire 4 is easy to bend, there will be no problem, but if it is hard to bend, it will be difficult to insert the heating wire 4 into both holes 2. It was difficult to construct a bad heater using this.

Furthermore, when constructing a heater by supporting each winding portion of the resistive heating wire 8 wound in a coil shape as shown in FIG. By first fitting the end portion 8a into one insertion hole 2 of the insulator 3 and advancing it one turn along the length of the heating wire 8, the end portion of the heating wire 8 is inserted into the other insertion hole 2. 8a can now be fitted.

After the heating wire 8 is fitted into the other insertion hole 2 in this manner, the insulator 3 is fed forward in the length direction of the heating wire 8 while straddling the two turns of the coiled heating wire 8.

Since the insulator 3 is fitted in this way, the heating wire 8
This means that only one piece can be fitted per turn.

Therefore, it was not possible to support the coiled heating wire on the insulator 3 at a plurality of locations for each winding portion.

Furthermore, fitting the insulator 3 to the coiled heating wire in the above-described manner is extremely inefficient, as the work is troublesome and time-consuming.

The present invention allows the heating wire to be easily inserted into one of the two heating wire insertion grooves through the opening of the insertion groove on the surface of the insulator facing the object to be heated. Thus, an insulator for supporting heating wires is provided which has improved the above-mentioned problems.

Hereinafter, the present invention will be explained in detail with reference to drawings of embodiments.

5A and 5B show an embodiment of the insulator 10 according to the present invention, 11 is provided inside the insulator 10, and the insulator 1
This is a first heating wire insertion groove that opens on the surface 10A facing the object to be heated.

The inserted resistance heating wire is placed in a part of this groove 11.
In order to further prevent the heat generating wire from escaping, a heat generating wire escape preventing portion 12 having a groove width smaller than the diameter of the heat generating wire is provided over the entire length of the groove 11.

A second heating wire insertion groove 13 is provided inside the insulator 10 in parallel to the heating wire insertion groove 11 and is open to the surface 10A of the insulator 10.

The width a of this groove is set to be larger than the diameter of the resistance heating wire to be inserted even at the narrowest part, so that the heating wire can be directly and easily inserted into the groove 13 from the surface 10A side of the insulator 10. There is.

Reference numeral 14 denotes a mounting screw insertion hole passing through the center of the insulator 10.

When fitting the above-mentioned insulator 10 to a resistance heating wire formed in a coil shape, first pass the heating wire through the heating wire insertion groove 11 from the length direction, and fit it into the desired position of the resistance heating wire. wear.

Next, in this fitting, the wound portion of the heating wire that is located adjacent to the position is fitted into the heating wire insertion groove 13 from the opening thereof.

In this case, the opening side should face the object to be heated.

FIG. 6 shows a main part of an example of a coiled heater configured as described above, and as shown, the heating wire 15 can be supported by a relatively large number of insulators 10.

In order to support this heater on another support such as an outer casing, it is sufficient to insert a mounting screw into the hole 14 and attach it to the support.

In this embodiment, the heat generating wire escape prevention portion is provided over the entire length of one of the heat generating wire insertion grooves, but it may be provided in a portion of the groove in the length direction.

As mentioned above, the insulator of the present invention has a heating wire escape prevention part formed in one of the two heating wire insertion grooves provided inside the insulator and opening on the surface facing the object to be heated. The heating wire inserted into the groove can be reliably supported without coming out.

Since the width of the other groove is set to be larger than the diameter of the inserted heating wire over the entire length, the heating wire can be inserted very easily from the opening of the groove.

Due to the above-mentioned features, when the insulator of the present invention is used to support a resistance heating wire formed in a coil shape, it can be extremely easily fitted into the desired position of two adjacent winding portions of the heating wire. Can be done.

Further, it is extremely convenient for supporting the heating wire when the resistive heating wire is repeatedly folded back to form a meandering heater having parallel portions of the heating wire.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an example of a bud heater, Fig. 2 is a cross-sectional view of a main part of the bud heater, Fig. 3 is a perspective view of an example of a conventional insulator for a heating wire, and Fig. 4 is a coiled heating wire. Figures 5A and 5B are plan views and front views respectively showing the embodiment of the present invention, and Figure 6 is a diagram showing an example of the use of the insulator of the present invention. FIG. 3 is a perspective view of main parts. 10...Insulator, IOA related to this invention...
- Surface facing the object to be heated, 11.13... Heat generating wire insertion groove, 12... Heat generating wire escape prevention part.

Claims (1)

[Scope of utility model registration request] Two heating wire insertion grooves are arranged in parallel inside, each of the heating wire insertion grooves is open on the surface facing the object to be heated, and one heating wire insertion groove has at least a portion of the heating wire insertion groove. A heat-generating wire characterized in that a heat-generating wire escape prevention portion is formed to prevent the inserted heat-generating wire from escaping, and the width of the other heat-generating wire insertion groove is set to be larger than the diameter of the inserted heat-generating wire over its entire length. Supporting insulator.