| 摘要 |
PROBLEM TO BE SOLVED: To simplify the connection to a power supply control box by forming contact terminals connected to the ends of heating elements internally installed in a metal case to be fixed by upper nuts. SOLUTION: Screw parts 3a in the ends of a pair of metal terminals 3 connected to respective ends of heating elements 2 of spiral nichrome wires by welding in a cylindrical metal case 1 with a brim 1a around the outer circumference have upper nuts 6a installable therearound and formed into an inverse V shape with its top apart and the interval enlarged so as to have a connection bar installed therein. An electric heater 10 used for a resin molding machine and a power supply control box can be easily connected by the upper nuts 6a. The interval between the aligned screw parts 3a of the connecting terminals 3 of the electric heater 10 are connected via a connection bar made of a copper plate having at least a notch part in one end and an installation hole in the other end, or notches in both ends. This constitution allows attachment/ detachment of the connection bar without detaching the upper nuts 6a so as to simplify the exchange of the electric heater.
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