JPS6337294B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an improvement of a heater unit for a kotatsu that is most suitable for a kotatsu or a hori kotatsu.

(B) Prior Art As shown in FIG. 1, a general heater unit for a kotatsu has a rectangular frame 1 surrounding the sides of an electric heater provided inside, and a protective guard 2 made of metal wire covering the lower surface. This protective guard is composed of a plurality of warp wires 3, 3... provided at predetermined intervals, and a plurality of latitude wires 4, 4... intersecting the wires and provided at predetermined intervals, A horizontal guard portion 5 and a vertical guard portion 6 are provided by welding the crossing portions (flat knitting state) and bending the respective outer sides. However, after the above-mentioned bending, unnecessary parts are created in the corner parts 7, 7, etc. of the protective guard due to the bending, so in the above-mentioned forming process, empty parts are formed on both sides of the meridian rod in advance as shown in Fig. 2. 8, 8, and after bending, a plurality of auxiliary meridian rods 9, 9, 9, which are formed separately and bent into a shape, are welded and fixed to the empty portions 8, 8.

For this reason, the number of steps for welding the auxiliary meridian wire formed separately after bending increases, and the types of wires also increase, which is unreasonable in terms of parts management.

(C) Purpose of the Invention The present invention improves the above-mentioned points by simultaneously cutting the unnecessary portions of one or both corner parts of the warp wire material and the latitude wire material at the bent portions of the warp wire material and the latitude wire material. Also, the corner portion of the protective guard can be guarded without using any special equipment.

(d) Structure of the Invention The structure of the present invention has an electric heater etc. inside, the side periphery is covered with a rectangular frame, the lower surface is covered with a protective guard made of metal wire, and the guard is spaced at a predetermined interval. It is composed of a plurality of warp wires provided in the same manner and a plurality of latitude wires that are welded at a predetermined interval to intersect with the warp wires, and the horizontal guard portion is formed by bending the relatively outer side of each of the warp wires. A vertical guard portion is formed, and unnecessary portions of the corner portions of one or both of the warp wire material or the latitude wire material are cut off at the same time as the above-mentioned bending.

(e) Embodiment FIGS. 3 and 4 show embodiments of the present invention, and will be explained based on these drawings. Reference numeral 10 denotes a heater unit having a trapezoidal external shape, which has an electric heater, thermostat, etc. (not shown) inside, and has a rectangular frame 11 surrounding the sides and the upper surface, and a protective guard 12 made of metal wire on the lower surface. It's twisted and covered.

In detail, this protective guard 12 is as follows:
3, 13... are a plurality of metal warp wires provided at a predetermined interval, and 14, 14... are a plurality of metal warp wires provided at a predetermined interval and intersecting the meridian wires at right angles. It is a latitude line material. The warp wire rod and the latitude wire rod are welded at their intersections 15, 15, . . . .

Thus, each wire is bent from the dotted line position in FIG. 4. During this bending process, the latitude wire 14, 1
Multiple pieces 14a, 14b, 14c, 1 on both sides of 4...
4A, 14B, 14C inside 14a or 1
According to 14c or 14C outside 4A, lengthen the necessary part (○ mark part) and unnecessary part (x mark part)
cut.

After that, bend it along the dotted line in Fig. 4, and the necessary part (marked with a circle) will be the corner part 1 of the protective guard 12.
6, 16... side to form a shape.

In the present invention, a plurality of unnecessary portions on the side of the weft wires are cut, but the unnecessary portions may be cut on the side of the warp wires, or each wire may be cut.

(F) Effects of the Invention As described above, the present invention allows the use of straight wires as the shape of each wire, which is favorable in terms of parts management and cost. That is, the corner portions of the protective guard are guarded as the warp wires and the latitude wires are bent.

[Brief explanation of the drawing]

Figure 1 is an external perspective view of a conventional heater unit for a kotatsu, Figure 2 is an exploded view of the protective guard,
FIG. 3 is an external perspective view of the heater unit for a kotatsu according to the present invention, and FIG. 4 is a developed view of the protective guard. 10... Heater unit, 12... Protective guard, 13, 13...,... Meridian wire material, 14, 14...,
... Latitude wire, 15, 15..., ... Intersection, 16,
16... Corner part, × mark...,... Unnecessary part.

Claims (1)

[Claims] 1.In a device that has an electric heater, etc. inside, the side periphery is covered with a rectangular frame, and the lower surface is covered with a protective guard made of metal wire, where the guard is a plurality of meridional wires provided at a predetermined interval. and a plurality of latitude wires intersecting the warp wires and welded at predetermined intervals, the outside of each wire being bent to form a horizontal guard part and a vertical guard part, A heater unit for a kotatsu, characterized in that the vertical guard portion is formed by cutting an unnecessary portion of one or both corner portions of the warp wire material or the latitude wire material, leaving the necessary portion and bending it into a shape.