JPH0337791U

JPH0337791U -

Info

Publication number: JPH0337791U
Application number: JP9887589U
Authority: JP
Priority date: 1989-08-24
Filing date: 1989-08-24
Publication date: 1991-04-11

Description

[Brief explanation of drawings]

第１図…従前の側面断面図の略図。第２図…第
１図の中間部分の断面図。第３図〜第７図…本考
案の一実施例の図面。第３図…第４図の中間部分
の断面図。第４図…碍子４へのコイル巻線５を示
す側面断面図。第５図…第４図の上面図。第６図
…第４図の底面図。第７図…本考案によつた一実
施例の側面断面図。１……碍子、１ａ〜１ｆ……貫通孔、２……外
殻金属管、イ〜ハ……電気発熱抵抗線、イａ，イ
ｂ〜ハａ，ハｂ……端末部、３……封口剤、４…
…碍子、４イ〜４ハ……折り返し溝、４１〜４７
……貫通孔、４ａ……巻初めの点、４ｂ……巻終
りの点、５……電気発熱抵抗線、コイル状疎巻線
、５ａ，５ｂ……巻初め、巻終わり端末部、６…
…電気絶縁性粉体、７……封口剤、８……外殻金
属管、７イ〜７ハ……スペーサー。 FIG. 1: A schematic diagram of a conventional side sectional view. FIG. 2: A sectional view of the intermediate portion of FIG. 1. Figures 3 to 7: Drawings of an embodiment of the present invention. FIG. 3...A sectional view of the intermediate portion of FIG. 4. FIG. 4...A side sectional view showing the coil winding 5 on the insulator 4. Fig. 5...A top view of Fig. 4. Figure 6: Bottom view of Figure 4. FIG. 7: A side sectional view of an embodiment according to the present invention. 1... Insulator, 1a to 1f... Through hole, 2... Outer shell metal tube, I to C... Electric heating resistance wire, I a, I b to C a, H b... Terminal part, 3... Sealant, 4...
...Insulator, 4A-4C...Fold groove, 41-47
...Through hole, 4a... Point at the beginning of the winding, 4b... Point at the end of the winding, 5... Electric heating resistance wire, coiled sparsely wound wire, 5a, 5b... Beginning of the winding, terminal part at the end of the winding, 6...
...Electrical insulating powder, 7. Sealing agent, 8. Outer shell metal tube, 7a to 7c. Spacer.

Claims

[Scope of utility model registration request]

In the case where an electric heating resistance wire is coiled around an insulator for a cartridge heater made of a heat-resistant electric insulating material, the shape of the insulator is cylindrical and first to seventh through holes are formed in the axial direction. They are arranged in a lotus root shape, and a seventh through hole is provided at the center of the arrangement.Furthermore, the upper surface of the insulator is provided with a turn-back groove that runs from the upper corner of the outer circumferential surface to the seventh through hole, and the bottom surface is provided with a folded groove that runs from the first through hole to the lower corner of the outer circumferential surface. The insulator is formed by providing a folding groove that passes through the seventh through hole and a folding groove that passes from the seventh through hole to the second through hole. The coil is wound from bottom to top on the outer circumferential surface through the hole, through the folding groove at the lower corner of the outer circumferential surface, through the folding groove at the upper corner of the outer circumferential surface, through the seventh through hole, through the folding groove of the seventh through hole on the bottom surface, and then through the folding groove of the seventh through hole on the bottom surface. The coil winding wire is pulled out to the upper surface through two through holes, and each end of the coil winding wire is formed upwardly only, forming a heating element corresponding to one three-phase AC, and the heating elements are stacked in three stages. Both terminals of each stage are provided with a cartridge heater in which three-phase alternating current can be applied by passing each terminal through the through holes of the previous stage independently.