JP2000018591A - Safety apparatus for gas instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a safety apparatus of a gas instrument capable of effective work with a simplified structure. SOLUTION: The present safety apparatus includes a fixed iron core provided in a case, and a movable iron core adsorbed to said fixed iron core against a return spring in response to press operation of an operation shaft, and thermoelectromotive force of a thermocouple is applied to the fixed iron core whereby the fixed iron core self sustains the movable iron core. Herein, when a body earth terminal 25 is fixed to a base 26 of a bobbin on which a coil of the fixed iron core 12 is wound, the body earth terminal 25 is fixed with an angular difference of at least 90 deg. or more between protrusion directions of a winding start terminal and a winding end terminal, and an end portion of body earth is welded to a slope 27 disposed at an end of a magnet holder 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a gas appliance, and more particularly to a safety device for a gas appliance which operates when a gas appliance such as a stove goes out to stop gas supply.

[0002]

2. Description of the Related Art In gas appliances such as table stoves, measures are taken to prevent gas from flowing out when the flame goes out due to blowout or boiling over and the like.

A conventional apparatus will be described with reference to FIG. FIG.
(A) mainly shows a combustion system, and FIG.
(B) mainly shows the operation of the safety device. FIG.
In FIG. 1A, reference numeral 1 denotes a main burner provided on a stove main body, and an ignition burner 2 and a thermocouple 3 are provided at a position close to the main burner.

Gas is supplied to the main burner 1 via a main pipe 4 and to the ignition burner 2 via an auxiliary pipe 5 branched from the main pipe 4. Then, the gas in this case is supplied via the safety device 6 .

[0005] In the safety device 6 , a movable iron core (hereinafter referred to as an armature) 7 is formed integrally with a solenoid valve 9 via a shaft 8. When the gas is not used, the solenoid valve 9 is pressed against the valve seat 11 by the force of the return spring 10 to prevent the gas from flowing. Also, 1
2 is a fixed iron core (hereinafter referred to as a U-shaped iron core), and a lead wire 1
3 is connected to the thermocouple 3. 14 is an operation shaft, and 15 is a casing.

An outline of a series of operations will be described below. First, when the gas is ignited, the operation shaft 14 is pressed, and the solenoid valve 9 is moved against the return spring 10. By moving the solenoid valve 9,
A space is opened between the valve seat 11 and the gas is supplied to each part through the space.

On the other hand, the ignition burner 2 is ignited simultaneously with the pressing of the operation shaft 14, and the flame from the ignition burner 2 ignites the main burner 1 . When the main burner 1 is ignited, the flame heats the thermocouple 3 and a thermoelectromotive force is generated after a predetermined time. The current generated by this thermoelectromotive force is
2 is excited to self-hold the armature 7. As a result, the solenoid valve 9 is kept open, and gas is supplied to the main burner.
Keep flowing to 1 .

[0008] Here, spills occur and the main burner
If 1 is extinguished, heating of the thermocouple by the main burner 1 stops. Therefore, the thermal electromotive force extinguishes and the holding of the armature 7 is released, so that the solenoid valve 9 moves in response to the force of the return spring 10 and closes the gas passage to prevent the gas from flowing. The above is the overall configuration and operation.

FIG. 4 is a schematic view around the U-shaped iron core. FIG. 4 (a) is a plan view and FIG. 4 (b) is a side view. In addition,
Each figure shows only a semicircular portion, but there is a magnet portion corresponding to the semicircular portion, and the shape is circular in total, but is omitted in FIG.

As shown in FIG. 4A, a bobbin 16 is provided around the U-shaped iron core 12. A winding 17 is wound around this bobbin, and a winding start terminal 18 is provided.
And a winding terminator 19.

A conductor 20 shown in FIG. 4B is connected to a positive terminal (not shown) and is connected to the winding start terminal 18. A body ground terminal 21 is provided below the winding terminator 19, and when the U-shaped iron core 12 is incorporated in the casing 15,
Fig. 4 for the magnet holder located below
Spot welding is performed at a portion indicated by 22 in (a) (described later).

FIG. 5 is a view showing another conventional U-shaped iron core and how to take the body ground. A body ground terminal 22 attached downward to the lower part of the winding terminator 19 in FIG. It is to be welded to the magnet holder 23. In this case, both side surfaces 24 of the circular magnet holder 23 are formed into a straight surface by milling, and the body ground terminal 22 is welded to this portion.

[0013]

In the above-mentioned conventional device, the former (FIG. 4) has a half-moon body ground terminal 2 (FIG. 4).
Since 1 protrudes in the same direction as the winding terminals 18 and 19 at the start and end, it is not possible to attach the terminals to the molten solder tank at the same time and dipping, resulting in poor work efficiency and high cost.

In the latter case (FIG. 5), when the body ground terminal 22 is welded to the magnet holder, it is necessary to form a flat portion on both side surfaces 24 by lathing once to form a circular shape and then performing both-side processing with a milling machine. As a result, work efficiency is low as in the former case, resulting in high costs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a safety device for a gas appliance capable of performing an efficient operation with a simple configuration.

[0016]

According to a first aspect of the present invention, there is provided a gas appliance safety device, comprising: a fixed iron core provided in a case; A gas appliance safety device comprising a movable core adsorbed on an iron core, and a thermoelectromotive force of a thermocouple is applied to the fixed core to self-hold the movable core.
In fixing the body earth terminal to the base of the bobbin around which the coil of the fixed core is wound, the body earth terminal is fixed by making an angle difference of at least 90 ° or more from the projecting direction of each winding start and end of the winding, and The end of the body ground was welded to the inclined surface at the end of the magnet holder. Therefore, when each winding start terminal and winding terminal are simultaneously put in a molten solder bath and dipped, the body ground terminal has an angle difference of at least 90 ° with each winding terminal, so that solder does not adhere to this, and efficient. Work becomes possible.

In the gas appliance safety device according to a second aspect of the present invention, in the first aspect, the body earthing terminal has a base surface of the bobbin as a horizontal line, and a vertical line with respect to the horizontal line as a reference. Fixed at an acute angle.

[0018]

FIG. 1 is a structural view showing an embodiment around a U-shaped iron core applied to a safety device for a gas appliance according to the present invention. In FIG. 1, the same parts as those in FIG.

1 is that the body ground terminal 25 is fixed obliquely. That is, as shown in FIG. 1B, the base surface X of the base 26 of the bobbin 16
-X 'is a horizontal line, and Y-
The body ground terminal 25 is fixed to the bobbin base 26 by setting the angle θ to an acute angle with respect to Y ′ as a vertical line. The portion indicated by the dotted line at the root of the body earth terminal 25 indicates that the body earth terminal is fitted into the base of the bobbin.

Referring to FIG. 1A which is a plan view of the bobbin, the projecting direction of the body ground terminal 25 is at least 90 ° or more with respect to the projecting direction Z of the winding start and end terminals 18 and 19. desirable. The reason is that when the terminals 18 and 19 at the beginning and end of the winding are simultaneously dipped in the molten solder bath, the body ground terminal 25 has an angle of at least 90 ° with the direction of each of the terminals 18 and 19. Therefore, solder does not adhere to the body ground terminal.

FIG. 2 shows the entire assembly diagram, and the reference numerals shown here are as already explained. As is apparent from FIG. 2, the end of the body ground terminal 25 projecting obliquely from the base 26 of the bobbin is welded to the inclined surface 27 of the bobbin holder 23.

[0022]

As described above, according to the present invention, when the body ground is fixed to the base of the bobbin, the body ground is provided with an angle difference of at least 90 ° or more from the projecting direction of each winding start and end terminal. In addition to the fixing, the end of the body ground is welded to the inclined surface of the magnet holder, so that it is possible to provide a safety device for a gas appliance which can be operated efficiently and is extremely inexpensive.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment around a U-shaped iron core applied to a safety device for a gas appliance of the present invention.

FIG. 2 is an overall assembly view of the safety device of the gas appliance.

FIG. 3 is a diagram showing the overall configuration and operation of a conventional device.

FIG. 4 is a diagram showing a winding start / end terminal, and a body ground terminal of a conventional device.

FIG. 5 is a diagram showing the mounting of another winding start / end terminal and a body ground terminal in the conventional device.

[Description of Signs] 1 Main burner 2 Ignition burner 3 Thermocouple 4 Main pipe 5 Auxiliary pipe 6 Safety device 7 Armature 8 Shaft 9 Solenoid valve 10 Return spring 11 Valve seat 12 U-shaped iron core 13 Lead wire 14 Operating shaft 15 Casing 16 Bobbin 17 Winding 18 Winding start terminal 19 Winding terminal 20 Conductor 21, 22, 25 Body ground terminal 23 Magnet holder 24 Both side surfaces 26 Base of bobbin 27 Inclined surface

Claims (2)

[Claims] 1. A fixed core provided in a case, and a movable core which is attracted to the fixed core against a return spring in response to a pressing operation of an operating shaft, and a thermocouple is provided for the fixed core. In a safety device for a gas appliance configured to self-hold a movable core by applying a thermoelectromotive force, when a body ground terminal is fixed to a base of a bobbin around which a coil of the fixed core is wound, each winding start and winding terminator Wherein the body ground is fixed at an angle difference of at least 90 ° or more from the projecting direction of the body, and an end of the body ground is welded to an inclined surface at an end of the magnet holder. apparatus. 2. The gas appliance safety device according to claim 1, wherein the body grounding terminal is formed such that a base surface of the bobbin is a horizontal line, and is fixed at an acute angle with respect to a vertical line with respect to the horizontal line. Safety device for gas appliances.