JPS596632Y2 - Insulator for padded heater - Google Patents

Description

[Detailed description of the invention] The present invention is an insulator for a pad heater for heating a required part of a long or large object to be heated, or for constructing a pad heater used for various types of furnace heaters. This is related to the improvement of.

1 to 3 show a pad heater 1 previously proposed by the present applicant.

This pad heater 1 has a plurality of ceramic insulators 3 each having two heating wire insertion holes 2 inside, which are arranged so that the insulators 3 are alternated in adjacent rows, and the direction is perpendicular to the row of the insulators 3. A resistance heating wire 4 such as a nichrome wire is passed through each heating wire insertion hole 2 and each insulator 3 is sewn together alternately and connected, and each insulator 3 has a tapered radiant heating wire connected to the heating wire insertion hole 2. A window 5 is provided over the entire length of the heating surface 3A, and the object to be heated 6 can be directly heated by radiation through the window 5.

By the way, in such a pad heater 1, in order to prevent the resistance heating wire 4 from escaping from the radiation heating window 5 provided in the insulator 3, the window width a of the portion communicating with the heating wire insertion hole 2 is set to the width a of the resistance heating wire 4. The insulator 3 is provided with a neck-shaped heating wire drop-off prevention part 7 that is smaller than the diameter b and extends along the entire length of the window 5.

Therefore, when constructing the pad heater 1 using a large number of insulators 3 and long resistance heating wires 4, the insulators 3 are arranged in the required order and connected individually with the resistance heating wires 4. This has the disadvantage that the work of connecting the insulator and the heating wire is troublesome and time-consuming.

The present invention provides an insulator for pad heaters that has an improved structure and eliminates the above-mentioned drawbacks.

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

Figures 4A and 4B show an embodiment of the insulator 10 for pad heaters according to the present invention, where 11 is the insulator body, and 11a is a heat generating unit provided inside the insulator body along its length. The wire receiving groove 11b is a groove having a wedge-shaped cross section, which is bored in the central part of the receiving groove along the length direction.

Reference numeral 12 denotes a columnar heating wire locking body which is detachably mounted in the heating wire housing groove 11a by inserting a leg portion 12a that fits into the groove 11b from the -length direction.

The recesses 12b provided on both sides of the heat generating wire locking body face the recesses 11C provided on both sides of the heat generating wire housing groove 11a, and serve to prevent the heat generating wire accommodated in the housing groove from escaping. do.

10a is the surface of the insulator 10 facing the object to be heated, and the gap 13 forms a radiation heating opening that communicates with the heating wire housing groove 11a.

When installing a pad heater as shown in FIG.
After storing a predetermined heat generating wire in the heat generating wire accommodation groove 11 a of the insulator body 11 from which the heat generating wire has been removed, the heat generating wire locking body 12 is inserted into the groove 11
b and attach it to the insulator body 11.

By sequentially repeating this operation for different parts of the heating wire, a large number of insulators 10 and the heating wire can be easily connected.

Therefore, the pad heater can be manufactured extremely easily.

In this embodiment, the length of the heating wire locking body 12 is made the same as the length of the insulator body 11, but it may be appropriately shorter than the length of the insulator body 11.

FIGS. 5A and 5B show other embodiments of the insulator 14 for a pad heater according to the present invention, in which the shape and mounting method of the heating wire locking body are different.

In the figure, the same parts as those in the previous embodiment are given the same reference numerals, and the explanation thereof will be omitted.

Reference numeral 11d designates a screw hole bored in the center of the heating wire housing groove 11a.

Reference numeral 15 denotes a cylindrical body as a heat generating wire locking body, and the radial dimension of this cylindrical body is different in three stages.The small diameter portion 15a on the tip side is threaded, and the threaded hole 11 is threaded.
It is screwed into d.

The next medium diameter portion 15b faces the concave portions 11C on both sides of the heat generating wire housing groove 11a, and cooperates with the outer large diameter portion 15C to prevent the heat generating wire accommodated in the heat generating wire housing groove 11a from escaping. play a role.

15d is a tool insertion hole with a hexagonal cross section provided on the surface of the large diameter portion 15C facing the object to be heated; 15e is this hole 15;
Next to d is a screw insertion hole that has a diameter smaller than that of the hole and passes through the axial center of the heat generating wire locking body 15.

When constructing a pad heater using the insulator 14 having such a structure, first the heating wire retaining body 15 is assembled in accordance with the above embodiment.
After removing the heating wire and storing the heating wire in the heating wire accommodation groove 11a, the heating wire locking body 15 is inserted into the screw hole 1 of the insulator body 11.
Just screw it into 1d.

In this case, insert a driver with a hexagonal cross section into the tool insertion hole 15d.
By inserting the heating wire locking body 15 into the insulator body 11 and turning it, the heating wire locking body 15 can be easily attached to the insulator body 11.

The hole 15e is used for inserting a mounting screw when attaching the insulator 14 to another support.

Figures 6A and 6B show modified examples of the insulator shown in Figure 5.
A hole 11e is provided in the center of the heating wire housing groove 11a in the insulator body 11, and the heating wire locking body 1 is inserted into this hole.
The small diameter portion 16a on the distal end side of No. 6 is fitted.

A through hole 16b is bored in the axial center of the heating wire locking body 16, and the heating wire locking body 16 is fixed to the insulator body 11 by passing a screw through this hole and attaching it to a predetermined mounting plate. .

This insulator is also combined with a heating wire in a manner similar to the insulator shown in Fig. 5 and used for the construction of a pad heater.

As described above, the insulator of the present invention includes an insulator body having a heat generating wire accommodation groove, and a heat generating wire removably provided in the accommodation groove to prevent the heat generating wire accommodated in the accommodation groove from escaping. Since the insulator and the heat generating wire are connected directly to the insulator body, a desired portion of the heat generating wire can be directly accommodated in the insulator body, making it extremely easy to connect the insulator and the heat generating wire.

Therefore, work efficiency can be greatly improved when manufacturing pad heaters using long heating wires and a large number of insulators.

[Brief explanation of drawings]

Figure 1 is a plan view of an example of a padded heater, Figure 2 is a cross-sectional view of a conventional padded heater, Figure 3 is a perspective view of a conventional insulator, Figures 4A and B and Figures 5A and B are respectively A plan view and a front view showing different embodiments of the present invention, and FIGS. 6A and 6B are a plan view and a front view showing a modification of the insulator shown in FIG. 1...Patsudohi evening, 3, 10.14...
...Insulator, 4...Resistance heating wire, 11...
・Insulator body, 11 a...Heating wire accommodation groove, 12
, 15.16...Heating wire locking body.

Claims (1)

[Scope of utility model registration request] A plurality of insulators are arranged such that the insulators are alternated in adjacent rows, a resistance heating wire is inserted through each of the insulators in a direction perpendicular to the row of insulators, and the insulators are sewn and connected in an alternate manner. In this insulator for a pad heater, the insulator body has a groove for accommodating the resistance heating wire, and an insulator body has a groove for accommodating the resistance heating wire, and a groove for preventing the resistance heating wire accommodated in the accommodating groove from escaping. What is claimed is: 1. An insulator for a padded heat insulator, comprising a heating wire locking body that is detachably provided.