JPS6314387Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a so-called band-shaped heater in which a heating wire is wound around a mica plate, both sides of which are covered with metal plates, and formed into a substantially cylindrical shape.

As an example of how to install a conventional band type heater,
As shown in FIG. 1, a first fastening fitting 12,
The second fastening fitting 13 is attached to the flange portion 1.
1' and the first fastening fitting 12, respectively, and attaching the fixing screw 14 to the screw hole 13a bored in the second fastening fitting 13, and attaching it to the outer peripheral surface of a container such as a water heater. Although it is fixed by crimping, the inner diameter of the band-shaped heater 10 is usually larger than the outer diameter of the container, etc. to which it is attached due to assembly. It is necessary to attach the first fastening fitting 11 and the second fastening fitting 12 and tighten the screws to the fixing screw 14 while crimping and fixing them inside along the surface, which has the disadvantage of very poor workability, and the band When the shaped heater 10 is attached to a container or the like and the fixing screws 14 are tightened, the flange portion 11'
As the screws tilt inward, the axial direction of the fixing screw 14 and the axial direction of the screw hole 13a of the second fastening fitting 13 gradually become misaligned, causing the fixing screw to become deformed or the through hole 11a of the flange portion 11' If the fixing screw 14 gets caught on the edge of the screw and the threaded portion collapses, a problem may occur.

The present invention solves the above-mentioned drawbacks, and one embodiment thereof will be described below with reference to the drawings.

In Figures 3 and 4, 1 is a band type heater;
A heating wire is wound around a mica plate, both sides of which are insulated by the mica plate, and the upper plate 2 and the seam plate 3 are clamped together, and both ends of the upper plate 2 are bent to form opposing flange portions 2'. It has been done. The flange portion 2' is provided with a cutout portion 2a formed by notching its end face, and a hook hole 2b is bored in the bent portion so as to span the flange portion 2' and the upper plate 2.

Reference numeral 4 denotes a first fastening metal fitting, which has a through hole 4a for the fixing screw 6 and a hook portion 4b that fits into the hook hole 2b.

5 is a second fastening metal fitting with a screw hole 5 for the fixing screw 6;
As well as drilling a, similar to the first fastening fitting 4,
A hook portion 5b is formed.

According to the above configuration, if the fixing screw 6 is passed through the through hole 4a of the first fastening fitting 4 and temporarily tightened into the screw hole 5a of the second fastening fitting 5 in advance, the fixing screw 6 can be inserted into the upper plate as a post-work. After inserting the band into the notch 2a of the flange 2' and fitting the hook 4b of the first fastener 4 and the hook 5b of the second fastener 5 into the hook hole 2b of the upper plate flange 2', The heater 1 may be inserted into the outer periphery of the container and the fixing screw 6 may be tightened.

As is clear from the above explanation, according to the present invention, the hole for the fixing screw, which was previously drilled in the flange part of the upper plate of the band-type heater, is simply made into a cutout shape, and the heater can be crimped and fixed. It is possible to improve workability when installing the heater, such as installing the first fastening metal fitting and the second fastening metal fitting, passing a fixing screw through a hole drilled in these metal fittings, and tightening the screws. Since a hook hole is drilled in the flange, even when the fastener is attached and the fixing screw is tightened, force is only applied to the bent part of the flange in the approximately tangential direction of the outer circumference of the heater at that point. There is no inclination inward, and therefore the axial direction of the fixing screw and the axial direction of the screw hole of the fastening fitting can be tightened almost in the same direction, so there is almost no deformation of the fixing screw, and the threaded part of the fixing screw is not attached to the flange. It has great practical value and has no problems such as crushing when it hits the edge of the notch.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of a conventional band-type heater.
Fig. 2 is a plan view of the main parts showing how the heater is attached to a container, Fig. 3 is an exploded perspective view of a band-shaped heater showing an embodiment of the present invention, and Fig. 4 is a plan view of the heater being attached to a container. FIG. 3 is a plan view of the main parts in a state. 1...Band type heater, 2...Top plate, 2'...
Flange portion, 2a... Notch portion, 2b... Hook hole, 3... Seam plate, 4... First fastening metal fitting, 4a
...Through hole, 4b...Hook part, 5...Second fastening fitting,
5a...screw hole, 5b...hanging part, 6...fixing screw.

Claims (1)

[Scope of utility model registration request] A heating wire is wound around a mica plate, both sides of which are insulated with mica plates, and the upper plate and the seam plate are used to clamp the heating wire.Both ends of the upper plate are bent to form opposing flanges, and the flange portion and the upper A hook hole is drilled across the board, and a pair of fastening fittings are formed with a hook part that is inserted into the hook holes, and an end face is attached to the flange part of the part where the fixing screw for tightening the fastening fittings is inserted. A band-shaped heater characterized by forming a notch section cut out from the direction.