JPH0445039Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to an electric furnace used for firing ceramics such as porcelain teeth, ceramic products, metal mechanical parts, etc. This invention relates to an electric furnace that allows easy checking of the presence or absence of disconnections such as wire breakage.

Prior Art A conventional electric appliance consists of a furnace body and a controller that controls its electrical operation, and the electrical wiring between the furnace body and the controller is conducted via a plug connector. In a furnace, to check for disconnections in the heater or temperature detection thermocouple in the furnace body, separate the plug-in connector between the furnace body and controller into each terminal, and then It was customary to check continuity with a tester or the like using a tester while referring to drawings regarding the terminals of a plug or outlet as a terminal on the body side.

Problems that the invention aims to solve However, such a check requires accurate wiring diagrams and continuity testing equipment such as a tester, as well as some electrical knowledge. Therefore, it is an object of the present invention to provide an electric furnace that allows anyone to easily check whether there is a break in the furnace body even without drawings or a testing device.

Means and Effects for Solving the Problems The present invention is applicable to an electric furnace in which electrical wiring 3 between a furnace body 1 and a controller 2 for controlling its electrical operation is carried out via a plug connector 4. , a circuit continuity checker 6 having a connection terminal fitting 5 of the same shape as the connection terminal fitting 8 on the controller side of the plug-in connector 4 as a terminal fitting 5 for checking the furnace circuit in the controller 2;
This is an electric furnace equipped with a

The circuit continuity checker 6 may be a normal tester that can tell the continuity of the circuit by the wobbling of the pointer, but it can also be like the one shown in Figure 4, which will emit a lamp to notify you if there is continuity in the circuit. Something simple and preferable.

By constructing the electric furnace in this way,
When it is desired to check whether there is a break in the electric circuit in the furnace body 1, the plug-in connector 4 is separated and the connection terminal fitting 7 on the furnace body side is connected to the circuit continuity checker 6 attached to the controller 2. Simply insert and connect the plug-in connector 4 into the furnace body circuit check terminal 5, which has the same shape as the controller side connection terminal, and check whether the circuit continuity checker 6 is lit or not. Anyone can easily check whether there is a break in the circuit within the furnace body section 1.

Embodiment As shown in the drawings, it consists of a furnace body 1 and a controller 2 that controls its electrical operation, and the electrical wiring 3 between the furnace body and the controller is connected via a plug connector 4. In electric furnaces that are now being used, the furnace body consists of an outlet 8 that is the same shape as the outlet 8 that is the controller side connection terminal of the plug connector 4 that is attached to a part of the outer surface of the back of the controller 2. The circuit check terminal 5 is similarly attached to another part of the outer surface of the back of the controller, and if there is continuity of the circuit as shown in FIGS. A circuit continuity checker 6 including a terminal fitting 5 for checking the furnace body circuit is attached inside the controller 1 so that the issuing diode 9 lights up.

In this electric furnace, when it is desired to investigate whether there is a break in the circuit such as the heater 10 or the temperature detection thermocouple 11 in the furnace body 1, it is necessary to By separating the plug-in connector 4 of the electrical wiring 3 and inserting the connection terminal fitting 7 on the controller side into the furnace body circuit check terminal fitting 5, it is possible to connect the heater or thermocouple in the furnace body. If there is no disconnection, each light emitting diode 9 will light up, and each predetermined circuit within the furnace body 1 can be checked very easily.

Effect of invention The present invention produces the following remarkable results.

B. Checking whether or not there is a break in the circuit inside the furnace body can be done by simply changing the connection terminal of the furnace body side connection terminal of the plug-in connector, and it is possible to check whether there is a disconnection in the circuit inside the furnace body. This makes it easy for even people without knowledge to distinguish between them.

(b) The structure of the circuit continuity checker 6 to be attached to the controller is simple, and the required space is small, so that the economic and capacity burden on the electric furnace itself is minimal.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a front view of the outer surface of the back of the controller of the embodiment, and Fig. 3 is a perspective view of the connecting terminal fitting on the furnace body side of the embodiment. ,
Fig. 4 is a circuit diagram showing the usage state of the circuit continuity checker of the embodiment, 1...Furnace body, 2...Controller, 4...Plug-in connector, 5...Furnace body circuit check. Connection terminal fittings, 6...Circuit continuity checker, 10...Heater, 11...Thermocouple.

Claims (1)

[Scope of utility model registration request] In an electric furnace in which electrical wiring 3 between a furnace body part 1 and a controller 2 for controlling its electrical operation is carried out via a plug connector 4, the controller 2 is provided with:
An electric furnace characterized in that a circuit continuity checker 6 is attached, which has a connecting terminal fitting 8 of the controller side of the plug-in connector 4 and a connecting terminal fitting 8 having the same shape as a terminal fitting 5 for checking the furnace body circuit.