JPS6220153Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an electrical outlet terminal in a sheathed heater.

BACKGROUND ART Conventionally, most of the electrical outlet terminals of sheathed heaters have been shaped as unthreaded round rods as shown in Figure 1a, or with a threaded portion S at one end as shown in Figure 1b. It was one of the round bars provided.

In addition, some conventional terminals have stepped terminals (see FIG. 5), as seen in Japanese Utility Model Publication No. 41-8780.

Problems to be Solved by the Invention In such a conventional configuration, the terminals shown in Figures 1a and b cannot connect two or more heating wires of different wire materials or wire diameters. Therefore, it cannot be used in a sheathed heater of the type in which a nichrome wire or [iron-chromium-aluminum wire] is connected in parallel with a molybdenum wire or tungsten wire that has a large positive temperature coefficient of resistance.

On the other hand, in the case of the stepped terminal 6 shown in FIG. 5, the first and second heating wires 9 and 10 can be connected to the small diameter part 7 and the large diameter part 8, but 1
After connecting the heating wire 9, when connecting the outer second heating wire 10, if you rotate the stepped terminal 6 as shown by the arrow below, the first heating wire 9 will be twisted. , the stepped terminal 6 cannot be rotated for work, resulting in poor workability.

An object of the present invention is to provide a terminal for a sheathed heater that allows heating wires to be connected in parallel and has good workability when connecting the heating wires.

Means for Solving the Problems The sheathed heater terminal of the present invention includes a cylindrical body and a rod-shaped body rotatably inserted into the cylindrical body, and a rod-shaped body is provided at one end of the rod-shaped body. a protrusion that engages with the other end of the cylindrical body when the other end protrudes from one end of the cylindrical body;
a heating wire is attached, the protrusion is brought into contact with the other end of the cylindrical body by the tension of the first heating wire, and a second heating wire is connected to the outer periphery of the one end of the cylindrical body. It is characterized by the following.

Effect According to this configuration, the first heating wire is connected to the other end of the rod-shaped body protruding from one end of the cylindrical body, and the second heating wire is connected to the outer circumference of the one end of the cylindrical body. . The rod-shaped body is inserted into the cylindrical body and can rotate freely.
Due to the tension of the first heating wire, a protrusion formed at one end of the rod-shaped body engages with the other end of the cylindrical body, and the longitudinal position of the cylindrical body is determined.

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

FIGS. 2 and 3 show an embodiment of the sheathed heater terminal of the present invention. 1 is a cylindrical body made of a conductor, and has an outer diameter A, an inner diameter B, and a length C.
It has been finished. Reference numeral 2 denotes a round rod as a rod-shaped body inserted into the inside of the cylindrical body 1. A flange 3 with an outer diameter A is formed as a protrusion on one end side, and the thickness E of the flange 3 is It is finished to have a lower length D and a lower diameter B of the flange 3. For example, A=2.5 [mm], B=
1.5 [mm], C = 50 [mm], D = 70 [mm], E = 2.0
Finished in [mm].

The round bar 2 is inserted into the cylindrical body 1 as shown in FIG. engages with the other end of the cylindrical body 1. The terminal assembled as shown in FIG. 2c is used as shown in FIG. Figure 3 shows nichrome wire 4 with a wire diameter of 0.35φ.
A heating element is shown in which a nichrome wire 5 with a wire diameter of 0.2φ is connected in parallel. Spot welded to the protruding end of the round bar 2. Since the cylindrical body 1 is fixed in position, the round bar 2 is moved in the direction of the arrow 1 by the tension of the nichrome wire 5.
When biased in the direction, the flange 3 comes into contact with the cylindrical body 1 and its movement is restricted, so the cylindrical body 1 and the round bar 2 are spot welded, or the round bar 2 is press-fitted or spot welded into the cylindrical body 1. It is possible to define mutual positions without fixing them by, for example,

In this way, the round bar 2 is inserted into the cylindrical body 1 and is rotatable, so when connecting the nichrome wire 4 to the cylindrical body 1 after connecting the nichrome wire 5 to the round bar 2, the cylindrical body 1 It is possible to work by rotating the machine, and the workability is better than before.

In the above embodiment, neither the cylindrical body 1 nor the round bar 2 were provided with a threaded part s, but the end of the cylindrical body 1 on the protruding side of the round bar 2 and the end of the round bar 2 on the side opposite to the flange 3 are provided. A threaded portion s may be provided on both or one of the end portions,
FIG. 4 shows a case where the cylindrical body 1 is provided with a threaded portion s. In this case, the parallel connection is, for example, for round bar 2.
A nichrome wire with a wire diameter of 0.4φ is spot welded, and a molybdenum wire with a wire diameter of 0.2φ is screwed into the threaded portion s of the cylindrical body 1 for connection. In this way, the threaded part s
If this is provided, even wires with high melting points that are difficult to spot weld can be reliably connected.

In the above embodiment, the collar portion 3 was provided at the other end of the round bar 2 as a protrusion that engages with the cylindrical body 1 when one end of the round bar 2 protrudes from the end of the cylindrical body 1.
The shape of the protrusion is not limited to a flange shape.

Effects of the invention As described above, according to the invention, a rod-shaped body is provided which is rotatably inserted into a cylindrical body, and the other end of the rod-shaped body is attached to one end of the rod-shaped body and protrudes from one end of the cylindrical body. A first heating wire is attached to the other end of the rod-shaped body, and the tension of the first heating wire causes the projection to engage with the other end of the rod-shaped body. Since the second heating wire is brought into contact with the other end of the cylindrical body and connected to the outer periphery of the one end of the cylindrical body, the first
and the second heating wire can be connected in parallel, and since the rod-shaped body is rotatably supported inside the cylindrical body, the cylindrical body can be rotated when connecting the second heating wire. Even when the first heating wire is heated, the first heating wire is not twisted, and the workability is good.

Furthermore, since the rod-shaped body has a protrusion that engages with the cylindrical body, the rod-shaped body can be locked to the cylindrical body by the tension of the connected heating wire, and the cylindrical body and the rod-shaped body can be connected. Even though the terminal is constructed by assembling separate parts, there is no need to fix the two parts by press-fitting or welding.

[Brief explanation of the drawing]

Figures 1a and 1b are front views of conventional terminals, respectively.
Figures 2 to 4 show embodiments of the present invention, Figures 2a and b are longitudinal sectional views of the terminal components, Figure 2c is a front view of the terminal according to the present invention, and Figure 3 is the state in use. FIG. 4 is a front view of an electrical outlet terminal showing another embodiment, and FIG. 5 is a longitudinal cross-sectional view of a conventional terminal. 1... Cylindrical body [cylindrical body], 2... Round bar [rod-shaped body], 3... Flange [projection], 4... Nichrome wire [second heating wire], 5... Nichrome wire [ [first heating wire], s...threaded part.

Claims (1)

[Claims for Utility Model Registration] 1. A cylindrical body and a rod-shaped body rotatably inserted into the cylindrical body, and one end of the rod-shaped body is connected to the other end of the cylindrical body. forming a protrusion that engages with the other end of the cylindrical body when protruding from one end;
A first heating wire is attached to the other end of the rod-shaped body, and the tension of the first heating wire brings the protrusion into contact with the other end of the cylindrical body, so that the outer circumference of the one end of the cylindrical body A terminal for a sheathed heater to which a second heating wire is connected. 2. The terminal for a sheathed heater according to claim 1, wherein a threaded portion is provided on both or one of the outer periphery of one end of the cylindrical body and the other end of the rod-shaped body.