JPS605267Y2 - Misoperation prevention device for gas appliances - Google Patents

Description

[Detailed description of the invention] This invention prevents erroneous operation in a gas appliance equipped with at least two burners that are supplied with gas in a switchable manner through a common ignition gas cock and a switching cock on the downstream side of the gas cock. Regarding equipment.

Conventionally, in this type of gas appliance, each burner is provided with a pilot burner for constant fire, gas is constantly supplied to the pilot burner when the gas cock for ignition is in the open position, and after the ignition operation by the gas cock is completed, the switching operation is performed by the switching cock. Generally speaking, it is desirable to omit the permanent pilot burner from the viewpoint of energy saving.

If the pilot burner for heating is omitted and the ignition gas cock is used to directly ignite each burner, when the switching cock is switched after the ignition operation is completed, the switch to the burner to which gas is newly supplied will be switched. Since the ignition is not performed and raw gas is released, it is necessary to prevent the danger caused by such erroneous operation.

The purpose of the present invention is to provide a device for preventing erroneous operation that meets this demand. In a type in which at least two burners 4 and 5 are provided to which gas can be freely supplied, there is a hole between the operating shaft 6 of the gas cock 2 and the operating shaft 7 of the switching cock 3, when the gas cock 2 is in the open position. The gas appliance 1 shown in the figure is equipped with a locking mechanism 8 that prevents the switching operation of the switching cock 3, and is a gas stove for a cooking table equipped with a burner 4 for boiling and a burner 5 for grilling. Ignition gas cock 2 to ignite burners 4 and 5
A common ignition burner 9 is used to supply gas only during the ignition operation.

To explain this in more detail, the gas cock 2 has an operating shaft 6 that can be freely rotated to three positions: a stop position, an open position, and an ignition position. As shown in C, gas from a gas port 11 is supplied to the gas passage 10 leading to the switching cock 3 and the ignition gas outlet 9a leading to the ignition burner 9, and at the same time, although not shown, a piezoelectric ignition device and other devices provided in the gas cock 2 are supplied. The ignition device is activated to ignite the ignition burner 9, and the ignition flame ignites either the boiling burner 4 or the grilling burner 5 to which gas is supplied via the switching cock 3. Then, when the operating shaft 6 is returned to the open position, the ignition gas outlet 9a is closed as shown in FIG. 3, so that only the one burner is given a combustion operation.

In the drawing, 4a and 5a are each burner 4 provided on the switching cock 3,
The gas outlet to 5 is shown.

The lock mechanism 8 includes a lock cam 12 connected to the operating shaft 6 of the ignition gas cock 2 and a lock piece 13 connected to the operating shaft 7 of the switching cock 3.
is rotated to one side and the other side beyond the center line passing through the axes of both operating shafts 6 and 7 by the switching operation of the switching cock 3, and the lock cam 12 is rotated by the rotation of the lock piece 13. The lock piece 13 has a semicircular shape with a diameter facing inside the trajectory, and the lock piece 13 is attached at one end of the semicircular shape.
A recessed portion 12a is formed to allow rotation.

In the drawings, reference numerals 14 and 15 indicate connectors for connecting the lock cam 12 and the lock piece 13 to the respective operating shafts 6 and 7 without rattling.

Next, to explain its operation, when the ignition gas cock 2 is in the stop position, the recessed notch 12a is opened as shown in FIG. 4a.
comes to the rotation trajectory of the lock piece 13, the switching operation of the switching cock 3 is permitted, and after switching this to any desired switching position, the above-described ignition operation using the ignition gas cock 2 is performed.

After the ignition operation is completed, when the gas cock 2 is in the open position, the lock cam 12 faces within the rotation locus of the lock piece 13, and the switching operation of the switching cock 3 from each switching position shown in FIG. This is prevented by the lock piece 13 coming into contact with the lock cam 12.

Therefore, when switching between the burners 4 and 5 to be used, first return the ignition gas cock 2 to the stop position, then switch the switching cock 3, and then switch the ignition gas cock 2 again.
Although it is necessary to carry out the ignition operation, this method does not pose the danger of raw gas release even without a permanent pilot burner.

According to the present invention, a locking mechanism is provided between the operating shaft of the gas cock and the operating shaft of the switching cock, which prevents the switching operation of the switching cock when the gas cock is in the open position.
The switching cock cannot be operated unless the ignition gas cock is returned to the closed position, and the switching operation by the switching cock after ignition can be reliably prevented, and there is a risk of raw gas being released due to switching the switching cock even if there is no standing burner. This has the effect of reliably eliminating the problem and providing a device that is advantageous in terms of safety and economy.

[Brief explanation of drawings]

Figure 1 is a diagram showing the gas circuit of a gas appliance to which the device of the present invention is applied, Figure 2 is a cut side view of an example of the device of the present invention, and Figure 3 is a diagram showing the gas circuit of a gas appliance to which the device of the present invention is applied.
Figures a, b, and c are cross-sectional plan views taken along the line ■-■ in Figure 2 to explain the operation of the ignition gas cock, and Figures 4 a and by c are cross-sectional plane views taken along the line IV-IV in Figure 2 to explain the operation of the locking mechanism. FIG. 1... Gas appliance, 2... Gas cock for ignition, 3... Switching cock, 4, 5...
Burner, 6, 7...Operating axis, End...Tatsuku mechanism.

Claims (1)

[Scope of utility model registration request] In a type in which a gas appliance 1 is provided with at least two burners 4 and 5 to which gas is supplied in a switchable manner via a common gas cock 2 for ignition and a switching cock 3 on the downstream side thereof, the gas cock 2 and an operating shaft 7 of the switching cock 3, a locking mechanism 8 is provided between the operating shaft 6 of the switching cock 3 and the operating shaft 7 of the switching cock 3.