JPH0628794Y2 - Blind heater unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a blind-shaped heater unit suitable for snow melting on a road and floor heating in a hotel or office.

[Problems to be solved by conventional techniques and devices]

In the winter, a method of burying an electric heater in floor heating of an office or snow melting in a parking lot is widely used. On the other hand, when the heater is laid in the field, the normal work period is very urgent, and the work period of a short number of days is often required.

From such a point of view, a cable manufacturer has previously carried a cord-shaped heater unit into the field and laying it in the field.

By the way, in such a blind-shaped heater unit, the heating wire is folded back in a meandering shape, and the flexible strips are arranged in parallel with each other by the meandering of the heating wire. It was used as a blind-shaped heater unit. In this cord-shaped heater unit, when the cord-shaped body is unfolded and laid on one plane, if the arranging pitch in the parallel portion of the heating lines is disturbed, overheating may occur due to contact between the heating lines, so heat generation Firmly joins at the intersection of the parallel part of the wire and the flexible band,
It is important to keep the laying pitch constant in the parallel part of the heating wire. However, on the other hand, if the crossing portion between the parallel portion of the heating wire and the flexible strip is to be firmly joined, it may be performed to a large number of crossing portions one by one, so that the assembly man-hours (manufacturing man-hours) are reduced. It tended to be enormous. For example, Japanese Utility Model Publication No. 46-3403 discloses an example in which a fixing piece made of rubber is used for connection (FIG. 5). However, in order to increase the fixing force, such fixing piece is molded by rubber molding. It seems that they will be integrated with each other, which means that the number of manufacturing steps has to be enormous, such as molding one by one into a large number of intersections using an injection molding machine.

In view of the above-mentioned problems of the prior art, the present invention can firmly cross-connect the flexible member in the parallel portion of the heating wire folded back in a meandering shape, and stabilize the laying pitch in the parallel portion of the heating wire. In addition, the assembly work can be done easily and quickly without using any parts that are uneasy to join.
It is an object to provide a blind-shaped heater unit of this kind.

[Means for Solving the Problems]

As shown in the accompanying drawings, a blind-shaped heater unit provided by the present invention includes a heating wire (1) folded back in a meandering shape and a flexible strip (2) arranged in a parallel portion by the meandering of the heating wire. )When,
An elastic tube body with a slit (3) fitted into the heating line while winding the flexible band body from the side at the intersection of the heating line and the flexible band body, , Its own cylindrical body has a slit (4) having a width smaller than the outer diameter of the heating wire, and opening side edges (3b, 3) for setting the width of the slit.
b) a notch (5) is formed in the middle in the axial direction, and the inner surface of the tubular body is made a rough surface (3a), and the flexible strip has one or both rough surfaces (2a). The elastic tubular body passes through the notch of the elastic tubular body at the portion intersecting with the heating wire, thereby axially locking the elastic tubular body at the widthwise edge of the flexible strip itself. The elastic tubular body is locked in the longitudinal direction of the flexible strip by engaging the rough surface portion on one side of the flexible strip with the rough surface portion in the elastic tubular body.

In the above features, a heating wire folded in a meandering shape,
The flexible strips that are arranged in parallel with each other by the meandering of the heating wire and the intersections of the heating strip and the flexible strip are fitted into the heating strip while winding the flexible strip from the side surface. An elastic tubular body with a slit, wherein the elastic tubular body with a slit has a slit having a width smaller than the outer diameter of the heating wire in its own tubular body, and an opening side edge for setting the width of the slit. A notch is formed in the middle of the axial direction of the above, and the flexible band is passed through the notch to be locked, which is the invention of Japanese Patent Application No. 63-37110, which is my earlier application. . As a further improvement of the invention of the prior application, the present invention is one in which a wavy groove is formed on the inner surface of an elastic cylindrical body with a slit and one or both sides of one flexible strip is formed. The elastic cylinder is devised so as to be locked in the longitudinal direction of the flexible band by engaging the one-side rough surface of the flexible band with the rough surface of the elastic cylinder. By cleverly combining the invented part and the improved part, the holding of the connecting position by the fitting of the slitted elastic cylinder between the heating wire and the flexible band is made more stable.

The rough surface of the inner surface of the elastic cylinder and the rough surface of one or both surfaces of the flexible strip may be rough as long as the surface is rough.
It is particularly preferable to use a wavy groove. In addition, the surface used for cross-linking the heating elements may be roughened with sandpaper or heat-resistant paint.

〔Example〕

1 to 3 show an embodiment of a blind-shaped heater unit according to the present invention. FIG. 1 is a schematic explanatory view of the blind-shaped heater unit, and FIG. FIG. 3 is an enlarged cross-sectional view and FIG. 3 is a perspective view showing a state where part A in FIG. 1 is disassembled.

As shown in FIG. 1, the heating wire 1 is folded back in a meandering shape, and a flexible strip 2 is formed in a parallel portion formed by the heating wire 1.
Are arranged in a crossed manner, and the unique elastic cylinders 4 with slits are connected at the intersections of the heating wires and the flexible strips in a unique manner to keep the laying pitch of the parallel portions of the heating wires 1 constant. It is the one.

As the heating wire 1, a resistance conductor made of a metal wire having a large electric resistance such as copper-nickel or nickel-chromium alloy and having an insulating coating made of a heat-resistant insulating material such as ethylene propylene rubber is used. As the flexible band 2, a thin and flexible one such as a polyester tape or a polyamide tape of 66 nylon is used. Further, the elastic cylinder body 3 with slits, which serves as a connecting means of the intersection of the heating wire 1 and the flexible strip 2, is made of a material such as polyamide, which is a trade name of 66 nylon, and is strong and has elasticity. A thick plastic pipe is used for the main body of the cylinder, and is processed so that the slit 4 is inserted therein. The inner diameter of the tubular body is made slightly larger than the outer diameter of the heating wire 1, so that both the flexible strip 2 and the heating wire 1 can be wound therein as described later. The width of the slit 4 set between the opposing opening side edges 3b and 3b is smaller than the outer diameter of the heating wire 1 so that the fitted heating wire does not come out.

In addition, improvements are added to each of the above elements. That is, the slitted elastic cylindrical body 3 is formed with a notch 5 formed by notching the opening side edges 3b, 3b in the middle of the axial direction,
Further, the wavy groove 3a as a rough surface is formed on the inner surface of the cylindrical body.
Is formed. The corrugated groove 3a is arranged so that the wave is parallel to the axial direction of the cylindrical body.

On the other hand, the flexible strip 2 is provided with corrugated grooves 2a as rough surfaces on both sides which are strip surfaces. The wavy groove 2a
Makes the waves parallel to each other in a direction orthogonal to the longitudinal direction of the strip itself.

Now, the procedure for assembling the blind-shaped heater unit in which each part is formed as described above will be described. First, the heating wire 1 is folded back in a meandering manner as shown in FIG. The flexible strips 2 are arranged to cross each other. Then, as shown in FIG. 3, the elastic cylindrical body with slit 3 is pressed from the slit 4 side from the surface of the flexible strip 2 to cut the heating wire 1 through the slit 4. Then, the flexible strip 2 is wound into the main body of the elastic tubular body 3, and the heating wire 1 is fitted into the main body of the tubular body. At this time, the heating wire 1 is strongly pressed against the inner surface of the tubular body 4c by the thickness of the flexible strip 2 wound in the tubular body together with the flexible strip 2 due to the lateral pressure of the heating wire. Also acts to press against the inner surface of the tubular body, and by extension, the elastic tubular body 3 with slits and the flexible strip 2 are coupled to the heating wire 1 with strong lateral pressure and do not shift in the longitudinal direction of the heating wire. .

In addition, the flexible strip 2 is provided with the notch 3 of the elastic cylindrical body with the slit.
The slit-shaped elastic tubular body 3 does not move in the axial direction at the crossing position of the flexible strip 2 by passing through a and thereby the edge of the strip is locked in the notch 3a in the axial direction of the tubular body. , And the wavy groove 2a on one side of the flexible strip 2
Engages with the corrugated groove 3a provided on the inner surface of the main body of the elastic tubular body 3, whereby the elastic tubular body 3 is locked so as not to move with respect to the longitudinal direction of the flexible strip 2 and, by extension, can be connected to the heating wire 1. The crossing point of the flexible strip 2 does not shift in the direction parallel to the heating line.

It should be noted that one of the wavy grooves 2a on both sides of the flexible strip 2 is used for pressure contact with the outer peripheral surface of the heating wire 1.

[Effect of device]

According to the above-described blind-shaped heater unit of the present invention, the heating wire is fitted while the flexible strip is wound by the elastic cylinder body with the slit that can be independently manufactured. Both are strongly pressed against the inner surface of the elastic cylinder with slit, preventing the elastic cylinder with slit and the flexible strip from shifting in the longitudinal direction of the heating line, and further, the flexible strip with slit By passing through the notch of the elastic tubular body and locking it, the elastic tubular body with slit is locked so as not to move in the longitudinal direction at the intersecting position of the flexible strip, and one side of the flexible strip is also locked. By engaging the side wavy groove with the wavy groove formed on the inner surface of the elastic tubular body, the elastic tubular body is locked so that it does not move in the longitudinal direction of the flexible strip, and the heating wire is flexible. It can be prevented from shifting in the longitudinal direction of the sex band, and then folded back in a meandering shape. The original purpose of providing this kind of blind-shaped heater unit is to make it possible to firmly cross-link the flexible member in the parallel portion of the heating wire and to stabilize the laying pitch in the parallel portion of the heating wire. Fully achieved. Further, according to the present invention, since the flexible strip is wound around the elastic cylinder with the slit and the heating wire is fitted, the predetermined joining of the crossing portion of the heating strip and the flexible strip is achieved. Easy and quick.

[Brief description of drawings]

The attached drawings show one embodiment of the blind-shaped heater unit according to the present invention. FIG. 1 is a schematic explanatory view of the blind-shaped heater unit, and FIG. 2 is a sectional explanatory view of a portion A in FIG. FIG. 3 is a perspective view showing a state in which part A in FIG. 1 is disassembled. In the reference numeral, 1 is a heating wire, 2 is a flexible band, 2a is a wavy groove (rough surface), 3 is an elastic cylindrical body with slits, 3a is a wavy groove (rough surface), 3b is an opening side edge, 4 is The slits 5 are notches.

Claims (1)

[Scope of utility model registration request] 1. A heating wire (1) which is folded back in a meandering shape, a flexible band (2) which is arranged so as to intersect in a parallel portion of the heating wire, and the heating wire and the flexible band. An elastic tube body (3) with a slit that fits into the heating wire while winding the flexible band from the side at the intersection of the heating wire and the elastic tube body with the slit. Has a slit (4) having a width smaller than the outer diameter of the opening side edge (3b, 3) for setting the width of the slit.
b) A notch (5) is formed in the middle in the axial direction, and a wavy groove (3a) is further formed on the inner surface of the tubular body, wherein the flexible strip has a wavy groove on one or both sides thereof. (2a)
And the elastic cylinder is axially locked at the widthwise edge of the flexible strip itself by passing through the notch of the elastic cylinder at the portion intersecting with the heating wire. A blind-shaped heater characterized in that the elastic tubular body is locked in the longitudinal direction of the flexible strip by engaging the rough surface portion on one side of the flexible strip with the rough surface portion in the elastic tubular body. unit.