JPH0625915Y2 - Blind heater unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention folds a heating wire in a meandering shape, and a parallel portion formed by meandering of the heating wire is cross-coupled with a flexible band material to form a blind. Regarding the heater unit. This kind of blind heater unit is applied for snow melting on a road and for floor heating in a hotel or office.

[Problems to be solved by conventional technologies and devices]

In the severe cold season, a method of burying an electric heater in the floor or in the ground for floor heating in an office or snow melting in an outdoor parking lot is widely known. When this heater is laid on site, the normal construction period is very urgent, and a short construction period is often required.

From this point of view, it has been attempted to improve the bottleneck by manufacturing a blind heater unit in advance by a heater manufacturer and then carrying this into the field and laying it.

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.

By the way, a bonding method has been proposed for a long time as a means for connecting the intersecting portions of the heating wire and the flexible strip, but
This has been improved because problems such as it takes time for the adhesive to harden and stable attachment cannot be achieved at all the intersections of the heating wire parallel parts and the flexible band due to the mounting group As such, there has been proposed one in which an Ω-shaped holding portion is integrally formed on a strip surface of a flexible strip material and a heating wire is fitted into the holding portion. (See Japanese Utility Model Publication No. 46-14825.) According to the conventional blind-shaped heater unit proposed as described above, the heating wire is simply inserted into the holding portion integrated with the flexible strip. It seems that the parallel connection between the parallel part and the flexible band can be achieved, but for that reason, it is necessary to make it sturdy so that the holding part itself cannot be easily deformed and the heating wire is not separated. However, the requirement for making it sturdy is incompatible with the strip material that requires flexibility, and it is practically difficult to integrally form a strong holding portion on the flexible strip material.

With regard to the above-mentioned holding portion, it was also considered that a strong locking piece is independently prepared and screwed to the flexible band material so that the locking piece is integrated with the flexible band material. (Actual development Sho 52-4
However, it is necessary to provide a large number of locking pieces as a holding portion for the heating wire on the flexible band material, and it is obvious that the work of screwing the locking pieces one by one is a man-hour. In addition to the troublesome increase, it was not overlooked that there was a problem that the locking piece was detached from the flexible strip due to improper tightening of the screw. Also, with such a locking piece, since the heating wire is simply inserted and locked, the gripping force by the locking piece is weak. Therefore, stick the adhesive tape at the part where the heating wire is hooked on the locking piece and press it down. However, since the pressing force of such an adhesive tape depends on the adhesive force of the tape, it does not result in a strong bond, and the adhesive tape is easily peeled off by careless handling during transportation and the heating wire is locked. There is a possibility that the heating wire may be detached from the flexible strip, and it is difficult to say that the heating wire can be firmly coupled to the flexible strip.

The present invention solves the above-mentioned problems of the prior art, and can firmly perform cross-linking with the flexible member in the parallel portion of the heating wire that is folded back in a meandering manner, and stabilizes the laying pitch in the parallel portion of the heating wire. It is an object of the present invention to provide a blind-shaped heater unit of this type, which can be made simple and can be assembled easily and quickly without using parts that are uneasy to connect.

[Means and actions for solving the problem]

As shown in the accompanying drawings, the blind-shaped heater unit provided by the present invention includes a heating wire 1 that is folded back in a meandering shape, and a flexible band member 2 that is arranged in a parallel portion by the meandering of the heating wire.
And an elastic cylindrical body 4 with a slit that holds the flexible strip from the side at the intersection of the heating line and the flexible strip and holds the flexible strip with the slit. The tubular body is provided with an opening edge notch 4c formed by cutting an opening edge 4b in the tubular body 4a of itself which sets a slit 3 having a width smaller than the outer diameter of the heating wire at an axial center. The flexible strip is formed with side edge cutouts 5 that engage with the opening edge cutouts of the elastic cylinder with slits that intersect with the heating wires.

According to the above-mentioned features of the present invention, since the heating wire is held while the flexible strip 2 is held by the elastic cylinder body 4 having slits, the heating wire is slit depending on the thickness of the flexible strip. It is strongly pressed against the inner surface of the elastic tubular body, which receives the side pressure of the heating line of the flexible strip and also presses it against the inner surface of the elastic tubular body with slits, and by extension, the elastic tubular body with slits and the flexible body. The strip can be prevented from shifting in the longitudinal direction of the heating wire, and the side edge notch 5 of the flexible strip engages with the opening edge notch 4c of the elastic cylinder body with slits to make it flexible. It is possible to prevent the crossing point of the heat generating wire and the elastic strip from being displaced in the parallel direction of the heat generating wire.

〔Example〕

1 to 5 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, FIG. 3 is a bottom view of FIG. 2, FIG. 4 is a cross-sectional view taken along line xx of FIG. 3, and FIG.

As shown in FIG. 1, the heating wire 1 is folded back in a meandering shape, and the flexible strip 2 is formed in the parallel portion formed by the heating wire 1.
Are arranged in a crossed manner, and the 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 was done like this.

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. Further, as the flexible band 2, a thin and flexible material such as a polyester tape or a polyamide tape having a trade name of 66 nylon is used. Further, the elastic cylinder 4 with slits, which serves as a connecting means for 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 cylinder body 4a, and the slit 3 is formed therein. The inner diameter of the cylindrical body 4a is slightly larger than the outer diameter of the heating wire 1,
Both the flexible strip 2 and the heating wire 1 can be held as described later. The width of the slit 3 set between the opposing opening edges 4b, 4b is made smaller than the outer diameter of the heating wire 1 so that the heating wire to be held does not come out.

In addition, improvements are added to each of the above elements. That is, the slit-shaped elastic cylinder body 4 is formed with an opening edge notch 4c formed by cutting out the opening edges 4b, 4b in the middle of the axial direction, while the flexible strip 2 is made to intersect the heating wire. The side edge cutout 5 is formed in a part, and the side edge cutout 5 can be engaged with the opening edge cutout 4c.

Now, the procedure for assembling the blind-shaped heater unit in which the respective portions are formed as described above will be described. First, the heating wire 1 is folded in a meandering manner as shown in FIG. The flexible strips 2 are arranged to cross each other. At this time, the side edge notch 5 of the flexible strip 2 is made to cross the heating wire 2. Then, as shown in FIG. 5, the elastic cylindrical body with slit 4 is pressed from the side of the slit 3 from the side surface of the flexible strip 2 to cut the heating wire 1 from the slit 3. Then, the side edge cutout 5 of the flexible strip 2 becomes the opening edge cutout 4
The heating wire 1 is held in the tubular body 4a while being held in the tubular body 4a while engaging with c. 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 which is wrapped in the tubular body, and the flexible strip 2 serves as the heating wire. It also acts to press it against the inner surface of the cylinder body with lateral pressure, which in turn
The elastic cylinder 4 with the slit and the flexible strip 2 are coupled to the heating wire 1 with a strong lateral pressure and do not shift in the longitudinal direction of the heating wire. Further, the side edge cutouts 5 of the flexible strip 2 are engaged with the opening edge cutouts 4c of the elastic cylinder body with slits, so that the slitted elastic cylinder body 4 is located at the side edge cutouts of the flexible strip material 2. Therefore, the crossing point between the flexible strip 2 and the heating wire 1 does not shift in the direction parallel to the heating wire.

[Effect of device]

According to the above-described blind-shaped heater unit of the present invention, since the heating wire is held while the flexible strip is held by the elastic cylinder with the slit that can be independently manufactured, Both of the members are strongly pressed against the inner surface of the elastic cylinder with slit, thereby preventing the elastic cylinder with slit and the flexible strip from shifting in the longitudinal direction of the heating wire, and By engaging the side edge cutout with the opening edge notch of the elastic cylinder body with slits, the elastic cylinder body with slits is locked so as not to move to the position of the side edge cutouts of the flexible strip, and thus the heating wire. Can be prevented from shifting in the longitudinal direction of the flexible strip, and by extension, the parallel portion of the heating wire folded back in a meandering manner can be firmly cross-coupled with the flexible member, and the parallel portion of the heating wire can be secured. This kind of blinds that can stabilize the laying pitch Original purpose of providing a heater unit can be sufficiently achieved. Further, according to the present invention, since the heating wire and the flexible band material achieve the predetermined joining of the intersections by wrapping the flexible material band in the slitted elastic cylinder and holding the heating wire, the assembly work is performed. However, there is also an advantage that it can be simply and quickly performed without using parts that are uneasy to join.

[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. 3 is a bottom view of FIG. 2, FIG. 4 is a sectional view taken along line xx of FIG. 3, and FIG.
The figure is a perspective view of the state of FIG. In the reference numerals, 1 is a heating wire, 2 is a flexible strip, 3 is a slit, 4 is an elastic cylindrical body with a slit, 4a is a cylindrical body 4b.
Is an opening edge, 4c is an opening edge notch, and 5 is a side edge notch.

Claims (1)

[Scope of utility model registration request] 1. A heating wire (1) which is folded back in a meandering shape, a flexible strip (2) which is arranged so as to intersect in a parallel portion of the heating wire, and the heating wire and the flexible strip. An elastic cylinder with a slit (4) that holds the flexible strip from the side surface at the crossing portion and holds the flexible band with the heating wire, and the elastic cylinder with the slit has its own cylinder body ( 4a), an opening edge notch (4c) is formed by cutting an opening edge (4b) that defines a slit (3) having a width smaller than the outer diameter of the heating wire at an intermediate position in the axial direction. For the band material,
A blind-shaped heater unit, characterized in that a side edge cutout (5) which engages with an opening edge cutout of the elastic tubular body is formed at a portion intersecting with the heating wire.