JPH07263037A - Connecting structure for linear heating element - Google Patents

Abstract

PURPOSE:To simply, reliably and electrically join a connecting member and linear heating elements together by inserting the heating elements formed by applying insulating covering to a conductor of carbonic short fiber in press-fitting cylinder parts having biting projections, and compressing them from an outer peripheral surface by a tool. CONSTITUTION:In a connecting member A of a metallic plate, a pair of almost C- shaped cross-sectional press-fitting cylinder parts 1 and 2 are continuously formed in a straight line shape through a connecting belt 3. Linear heating elements 4 covered with insulating covering materials 4b are connected to these by using cabonic short fiber as conductors 4a. After the heating elements 4 are inserted in the press-fitting cylinder parts 1 and 2 still in a covered condition, they are compressed in the diametrically contractive direction from an outer peripheral surface by a press-fitting tool. Biting projections 1a and 2a break through the covering materials 4b of the heating elements 4, and are electrically continued to the conductors 4a, and electrically connect the left and right heating elements 4 and 4 to each other, and at the same time, the cylinder parts 1 and 2 embrace and hold them from a covering outer peripheral surface, and mechanically firmly join them together. An outside surface of the member A is sealed by and covered with an insulating cover body 5 so as to be used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure between linear heating elements each having a carbon short fiber as a core wire and the core wire covered with an insulating coating, or between the linear heating element and a coated electric wire. It is about.

[0002]

2. Description of the Related Art In recent years, a linear heat generated by covering carbonaceous short fibers with an insulating coating on a snow-melting device buried in a road or roof in a snowfall area and a heating or heat-insulating device buried in a floor or wall of a building. The body has come to be used as an effective heat carrier.
This heating element is very effective in that it has excellent flexibility, strength and thermal efficiency, and that a desired electric resistance value can be easily set.

[0003]

In this linear heating element, since the conductor serving as the core wire is formed by collecting carbon short fibers in a linear shape, the core wire itself is compared with respect to tension and twist. Are vulnerable. Therefore, when electrically connecting the linear heating elements or between the linear heating element and the covered electric wire, twist the bare core wire from which the coating of the linear heating element is removed to the core wire of the other linear heating element or the covered electric wire. When connected by connecting or using a sandwiching body, the core wire of the linear heating element may be partially sheared or torn off by the load at the time of coupling.

Therefore, the main object of the present invention is to perform a simple operation of crimping from the outer periphery of the coating without leaving the core wire of the above-mentioned linear heating element bare, and without causing the above-mentioned partial shearing and tearing. Another object of the present invention is to provide at low cost a connecting member that can be electrically connected to the other linear heating element and can mechanically and firmly connect the linear heating element to the other linear heating element or the covered electric wire.

[0005]

In order to achieve the above object, the present invention takes the following technical means. That is, in the connection member for the linear heating element according to the present invention,
A pair of crimping cylinder parts (1) with a cutout part having a substantially C-shaped cross section,
(2) is a metal plate connecting member (A) linearly integrally connected via a connecting band (3), at least one crimping member (1) of the crimping cylinder portion is a carbon short fiber The core wire (4a) is formed to have a size capable of inserting the linear heating element (4) in which the core wire (4a) is covered with an insulating coating material (4b), and the crimping cylinder part (1) has a tip. Plural sharp biting protrusions (1a) are punched inward, and the biting protrusions (1a) are longer than the thickness of the coating material (4b) of the linear heating element (4). It is configured to be formed.

[0006]

[Function] The connecting member (A) having the above-mentioned structure is provided with a carbon fiber short fiber in the crimping cylinder portion (1) provided with the engaging projection.
(4a) a wire heating element in which the core wire is covered with an insulating coating material (4b)
After inserting (4) as it is, the crimping cylinder part (1) is compressed from the outer peripheral surface in the diameter reducing direction with an appropriate crimping tool. As a result, the biting protrusions (1a) and (2a) pierce the covering material (4b) of the linear heating element (4) and conduct to the core wire (4a), and the connecting member (A) and the linear heating element ( 1) and can be electrically connected.

[0007]

Embodiments of the present invention will be described below with reference to the embodiments shown in the drawings. 1 and 2, reference numeral (A) indicates a first embodiment of a connecting member according to the present invention, which is integrally formed of a thin conductive metal plate. This connecting member (A) is formed by connecting a pair of crimping cylinders (1) and (2), each of which has a substantially C-shaped cross-section by cutting out an annular part, through a connecting band (3) in a linear manner. Has been done. In the present embodiment, the crimping cylinder portions (1) and (2) are linear heating elements (4) in which carbon short fibers are used as the core wire (4a) and the core wire (4a) is covered with an insulating coating material (4b).
, And the crimping cylinder portions (1) and (2) each have a plurality of biting protrusions (1a) with sharp tips.
(2a) ... is punched inward. The biting protrusions (1a), (2a) are formed longer than the thickness of the coating material (4b) of the linear heating element (4).

When the left and right linear heating elements (4) and (4) are connected by the connecting member (A) thus constructed, the linear heating elements (4) and (4) are connected to the crimping cylinder portions (1) and (2). After inserting 4) and (4) as they are, the crimping cylinders (1) and (2) may be compressed from the outer peripheral surface in the diameter reducing direction with an appropriate crimping tool. As a result, the biting protrusion (1
a) and (2a) pierce the covering material (4b) of the linear heating element (4) and conduct to the core wire (4a), and the left and right linear heating elements (4) and (4) are electrically joined. It At the same time, the linear heating elements (4) and (4)
By (1) and (2), the outer peripheral surface of the coating can be held and held tightly and mechanically bonded. After this, the connection member (A)
The exposed outer surface of the insulation cover (5) together with the end of the compression cylinder
It is used after being hermetically sealed with.

As an example of the insulating cover body (5), FIG.
And Fig. 2 shows a tube made of heat-shrinkable synthetic resin (5
a) is used. This tube (5a) is the connecting member (A)
Before being connected to the linear heating elements (4) and (4), one of the linear heating elements (4) is fitted in advance, and after connection, heat shrinks to hermetically cover the connecting member portion.

3 to 5 show another example of the cover body (5). This cover body (5) is formed by a cylindrical semi-cut synthetic resin body part (7) and a lid part (8) that are integrally connected via a hinge (6) in a foldable manner. The concave groove (9) and the ridge (10) formed on the opposite free end surfaces are engaged with each other so that they can be hermetically held. In this case, it is preferable to interpose a seal packing (11) between the inner surface of the end of the cover body (5) and the peripheral surface of the linear heating element (4) as shown in FIG.

In the above embodiment, the left and right compression cylinder parts
Although (1) and (2) are formed in the same shape and are configured to connect the linear heating element (4) together, either one of the compression cylinders, for example, the left compression as shown in FIG. Cover the tube (2) with the covered electric wire (1
You may form in the form which can connect 2). In this embodiment, the compression cylinder part (2) comprises a U-shaped receiving part (2b) having a U-shaped cross section for crimping the core wire (12a) of the covered electric wire and a U-shaped receiving part (2c) for tying the covered part of the covered electric wire. ing.

[0012] Although the examples considered to be typical of the present invention have been described above, the present invention is not necessarily limited only to the structures of these examples, has the constitutional requirements, and achieves the object of the present invention. It can be carried out by appropriately modifying it within a range in which the above effect is exhibited.

[0013]

As described above, according to the present invention, the crimping cylinder portion provided with the biting protrusion is covered with a linear heating element in which a carbon short fiber is used as a core wire and the core wire is covered with an insulating coating material. After inserting as it is, by compressing the crimping cylinder portion from the outer peripheral surface in the diameter reducing direction with an appropriate crimping tool, the connecting member and the linear heating element can be electrically joined very easily. It is possible to reliably prevent partial shearing and tearing of the relatively fragile carbon short fiber core wire, as when connecting the core wire of the linear heat generating element in a bare state. Is held and held from the outer peripheral surface of the cover by the compression cylinder portion, and can be mechanically and firmly connected,
There is a remarkable effect that it is possible to prevent the occurrence of line disconnection due to a tensile load during use.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a connecting member according to the present invention.

FIG. 2 is a cross-sectional view showing a usage state of the connecting member.

FIG. 3 is a sectional view showing another embodiment of the connecting member according to the present invention.

FIG. 4 is a plan view of the cover body in the embodiment shown in FIG.

5 is an enlarged cross-sectional view taken along the line BB in FIG.

FIG. 6 is a perspective view showing another embodiment of the connecting member according to the present invention.

[Explanation of symbols]

 (1) Crimping cylinder (1a) Engagement protrusion (2) Crimping cylinder (3) Connecting band (4) Linear heating element (4a) Core wire of linear heating element (4b) Coating of linear heating element (A ) Connection member

Claims (1)

[Claims] 1. A metal plate in which a pair of crimping cylinders (1) and (2), each of which has a substantially C-shaped cross section formed by notching an annular part, are linearly integrally connected via a connecting band (3). A connection member (A), wherein at least one of the pressure-bonding members (1) of the pressure-bonding tubular portion is a linear wire in which carbonaceous short fibers are used as a core wire (4a) and the core wire (4a) is covered with an insulating coating material (4b). The crimping cylinder part (1) is formed to have a plurality of biting projections (1a) ... And the biting protrusions (1a) ... are covering materials (4b) for the linear heating element (4).
A linear heating element connector that is formed longer than the thickness of the.