JPH04359885A - Rod heater supporting device - Google Patents

Abstract

PURPOSE:To provide a supporting device for a rod heater designed in such a way that a tape covering the rod heater is unlikely to be displaced and the supporting device is capable of surely supporting the rod heater when the rod heater repeats telescopic motions due to thermal expansion and contraction. CONSTITUTION:A tape 10 is mounted on a lower supporting metal fitting 13, and subsequently a rod heater 1 is mounted thereon, and end side of the tape 10 is wound along the peripheral of the rod heater 1 wrapping it, after the end side is further extended and doubled inside the rod heater 1, it is fixed by an upper supporting metal fitting 14, then a part of the doubled part of the tape 10 is pushed and fixed in a through hole 13a formed in the lower supporting metal fitting 13 by an extruded part 14a formed on the upper supporting metal fitting 14. The tape 10 is pressed down at a the fitting part of projected part 14a and the recessed part 13a of the upper and lower supporting metal fittings, respectively, so that displacement, fallout, etc., of the tape 10 can be prevented, including that terminal sides of the tape 10, without being effected by the displacement due to thermal expansion or contraction of the rod heater 1.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a baseboard heater,
This invention relates to a support device for a rod-shaped heating element used in a heater for a train, an air heater for heating an air conditioner, and the like.

0002

2. Description of the Related Art FIG. 7 is a side view showing a conventional support device for a rod-shaped heating element, FIG. 8 is an exploded perspective view of the support device, FIG. 9 is an enlarged view of the main parts thereof, and (a) (b) shows the state of contraction of the rod-shaped heating element.

In the figure, 1 is a rod-shaped heating element showing a sheathed heater used, for example, in a baseboard heater;
It is U-shaped. 2 is a lead wire that supplies power to the rod-shaped heating element 1; 3 is a lower support fitting that supports and fixes the rod-shaped heating element 1 at multiple points; 4 is an insulator that fixes the lower support fitting 3; 5 and 6 are lower supports, respectively. Screws and nuts 7 attach the metal fittings 3 to the insulator 4, 7 is a mounting plate to which the insulator 4 is attached, 8 and 9 are screws and nuts that respectively fix the insulator 4 to the mounting plate 7, and the rod-shaped heating element 1 is attached to the mounting plate by the insulator 4. 7 while maintaining electrical insulation. Reference numeral 10 denotes a tape woven from fibers with excellent heat resistance such as ceramic fibers, which supports the rod-shaped heating element 1 in response to changes in shape due to thermal expansion and contraction of the rod-shaped heating element 1. The tape 10 has a hole 10a and is placed on the lower support fitting 3. Next, the rod-shaped heating element 1 is placed on this tape 10, and the tape 10
The terminal portions of the rod-shaped heating element 1 are each bent inside the rod-shaped heating element 1 to cover a part of the outer periphery of the rod-shaped heating element 1. Then, the upper support metal fitting 11 is arranged on the upper part of the rod-shaped heating element 1, and is fixed to the lower support metal fitting 3 using the screw 12 so as to press down the tape 10 with the upper support metal fitting 11. As a result, the rod-shaped heating element 1 is supported, and power is supplied to the rod-shaped heating element 1 via the lead wire 2 to cause the rod-shaped heating element 1 to generate heat, thereby raising the surrounding temperature.

0004

[Problems to be Solved by the Invention] Since the conventional support device for a rod-shaped heating element is constructed as described above, it has had the following problems. This will be explained using FIG. 9. First, when power is supplied to the rod-shaped heating element 1, the rod-shaped heating element 1 is heated and causes thermal expansion, and as shown in FIG. Since it is U-shaped, it extends in the direction of arrow F. Further, when the power supply to the rod-shaped heating element 1 is cut off, the rod-shaped heating element 1 which has been thermally expanded
contracts, and as shown in FIG. 9(b), its diameter decreases in the direction d and also in the direction of the arrow f, returning to the size before thermal expansion. Therefore, as the amount of heat generated from the rod-shaped heating element 1 is controlled, the power is turned on and off repeatedly, and the rod-shaped heating element 1 repeatedly expands and contracts in the directions of arrows F and f. As a result, the end portion of the tape 10 is pulled out little by little, and when used for a long time, the tape 10 comes off, making the support of the rod-shaped heating element 1 unstable and insufficient, and further expanding and contracting force is applied to the lower support metal fitting 3. It may be conducted to the insulator 4 through the insulator 4, and the insulator 4 may be damaged.

[0005] This invention was made in order to solve the above-mentioned problems, and when the rod-shaped heating element repeatedly expands and contracts due to thermal expansion and contraction, the tape covering the rod-shaped heating element is difficult to shift, and the rod-shaped heating element is reliably fixed. An object of the present invention is to obtain a rod-shaped heating element support device capable of supporting a heating element.

[0006]

[Means for Solving the Problems] A rod-shaped heating element support device according to the present invention includes a rod-shaped heating element that repeatedly expands and contracts due to thermal expansion and contraction, and covers this rod-shaped heating element to absorb minute changes in shape due to expansion and contraction. a tape, a first support member that supports the rod-shaped heating element, and a second support member that fits and fixes the rod-shaped heating element to the first support member with the tape interposed therebetween; 1 support member and the second support member
A convex portion and a fitting portion into which the convex portion is fitted are provided on the fitting surface of the support member, and the tape is disposed between the convex portion and the fitting portion.

[0007]

[Function] The rod-shaped heating element support device according to the present invention has the following advantages:
To securely fix a tape between a convex part and a fitting part when fixing a rod-shaped heating element by fitting a first support member and a second support member.

[0008]

【Example】

Example 1. FIG. 1 is a side view of a support device for a rod-shaped heating element showing an embodiment of the present invention, FIG. 2 is an exploded perspective view of the support part,
FIG. 3 is an enlarged view of the main part. In the figure, 1, 2, 4
10 and 12 are the same or equivalent parts as in the conventional example, so the explanation will be omitted. 13 is a lower support fitting that supports and fixes the rod-shaped heating element 1 at multiple locations, and has two through holes 13a. . Reference numeral 14 denotes an upper support metal fitting, which has a convex portion 14a, and when it is joined to the lower support metal fitting 13, the convex portion 14a is inserted into the through hole 13a. 10 is a tape for releasing thermal expansion and contraction of the rod-shaped heating element 1, and has a hole 10a. Note that the lower support metal fitting 13 corresponds to a first support member, the upper support metal fitting 14 corresponds to a second support member, the convex portion 14a corresponds to a convex portion, and the through hole 13a corresponds to a fitting portion.

Next, support for the rod-shaped heating element 1 will be explained. A tape 10 is placed on the lower support metal fitting 13, a rod-shaped heating element 1 is placed on the tape 10, and the end portion of the tape 10 is bent into the rod-shaped heating element 1 to cover the outer circumference of the rod-shaped heating element 1. Then, the upper support metal fitting 11 is arranged on the upper part of the rod-shaped heating element 1, and is fixed to the lower support metal fitting 13 using the screw 12 so as to press down the tape 10 with the upper support metal fitting 11. At this time, the convex portion 14a is inserted into the through hole 13a through the tape 10.
The tape 10 is firmly fixed without coming off. As a result, as shown in Fig. 3, when the rod-shaped heating element 1 is energized, its diameter expands (D in the figure) and thermally expands toward the arrow F side, and when it is not energized, the diameter contracts (d in the figure). ), even if the tape 10 contracts in the direction of the arrow f, the tape 10 will not shift, and even if force is applied to the support fittings due to the expansion and contraction of the rod-shaped heating element 1, it will be absorbed by the tape 10, and the rod-shaped heating element 1 will be reliably moved. To support.

Example 2. In the above embodiment, there is a through hole in the insertion part.
3a is shown, but a concave portion into which the convex portion 14a can be fitted may also be used. FIG. 4 is a side view showing another embodiment, FIG. 5 is an exploded perspective view thereof, and FIG. 6 is an enlarged view of the main parts thereof.

In the figure, 1, 2, 4 to 10, 12, 1
Reference numeral 4 is the same or equivalent portion as in the conventional example or the embodiment of the invention described above, and therefore the explanation thereof will be omitted. An insulator 15 is fixed to the mounting plate 7 with screws 8 and nuts 9, and has a concave portion 15a that fits into the convex portion 14a of the support fitting 14. 16 is a nut. 16 is a nut. Note that the insulator 15 corresponds to a first support member, and the recessed portion 15a corresponds to a fitting portion.

Next, support for the rod-shaped heating element 1 will be explained. A tape 10 is placed on the insulator 15, and this tape 10
The rod-shaped heating element 1 is placed on top of the rod-shaped heating element 1, and the end portion of the tape 10 is bent over the rod-shaped heating element 1 to cover the outer circumference of the rod-shaped heating element. Then, the upper support fitting 11 is placed on the top of the rod-shaped heating element 1,
Using screws 12 and nuts 16, rod-shaped heating element 1 is inserted and fixed between insulator 15 and upper support fitting 11 via tape 10. At this time, the convex portion 14a is fitted into the concave portion 15 via the tape 10, and the tape 10 is securely fixed without coming off. Thereby, as shown in FIG. 3, even if the rod-shaped heating element 1 thermally expands or contracts, the tape 10 does not shift and reliably supports the rod-shaped heating element 1.

In the above embodiment, the upper support fitting 11 is provided with a convex portion 14a, the lower support fitting 13 is provided with a through hole 13a, or the insulator 15 is provided with a concave portion 15a. The arrangement of the through hole 13a or the concave portion 15a may be reversed, and the same effect as in the above embodiment can be obtained.

[0014]

As described above, according to the present invention, since the tape covering the rod-shaped heating element is disposed between the convex portion and the fitting portion, the first support member and the second support member can be When fixing the rod-shaped heating element through the fitting tape, the convex part pushes the tape into the fitting part and securely fixes it.
A highly reliable support device for the rod-shaped heating element 1 is obtained, which can minimize the displacement of the tape due to contraction of the rod-shaped heating element, and prevents the tape from coming off even after long-term use.
Furthermore, the shape of the tape wrapped around the rod-shaped heating element is such that the tape is pushed into the fitting part of the convex part and the fitting part, so tension is applied and the tape adheres tightly to the outer periphery of the rod-shaped heating element, eliminating variations during assembly work. This has the effect of providing a good-looking finish.

[Brief explanation of drawings]

FIG. 1 is a side view of a support device for a rod-shaped heating element showing a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a support device for a rod-shaped heating element showing a first embodiment of the present invention.

FIG. 3 is an enlarged view of a main part of a support device for a rod-shaped heating element showing a first embodiment of the present invention.

FIG. 4 is a side view of a support device for a rod-shaped heating element showing a second embodiment of the present invention.

FIG. 5 is an exploded perspective view of a support device for a rod-shaped heating element showing a second embodiment of the present invention.

FIG. 6 is an enlarged view of a main part of a support device for a rod-shaped heating element showing a second embodiment of the present invention.

FIG. 7 is a side view showing a conventional support device for a rod-shaped heating element.

FIG. 8 is an exploded perspective view showing a conventional support device for a rod-shaped heating element.

FIG. 9 is an enlarged view of main parts of a conventional support device for a rod-shaped heating element.

[Explanation of symbols]

1 Rod-shaped heating element 2 Lead wire 3 Lower support metal fittings 4 Insulator 5 Screw 6 Nut 7 Mounting plate 8 Screw 9 Nut 10 Tape 10a hole 11 Upper support bracket 12 Screw 13 Lower support metal fittings 13a Through hole 14 Upper support metal fittings 14a Convex part 15 Insulator 15a Concave part 16 Nut

Claims (1)

[Claims] 1. A rod-shaped heating element that repeatedly expands and contracts due to thermal expansion and contraction, a tape that covers the rod-shaped heating element and absorbs minute changes in shape of the rod-shaped heating element due to expansion and contraction, and supports the rod-shaped heating element. a first support member; and a second support member that fits and fixes the rod-shaped heating element to the first support member with the tape interposed therebetween; A rod-shaped heating element support device characterized in that a fitting surface of a member is provided with a convex portion and a fitting portion into which the convex portion is fitted, and the tape is disposed between the convex portion and the fitting portion.