JPS602464Y2 - Gas Kotoku operating axis return device - Google Patents

Description

[Detailed description of the invention] This invention is based on the idea that when the operating shaft is rotated without being pressed, the closure is simultaneously rotated in the opening direction, and at the same time, the hook provided on the operating shaft is used to hammer the piezoelectric igniter. The present invention relates to a so-called one-touch automatic ignition gas cock which is operated by a gas cock, and particularly to its operation shaft return device.

One-touch automatic ignition gas cocks are those that rotate from the 0 degree closed position in the open direction without pressing the operating shaft.
At the same time as the rotation starts, the pilot gas outlet opens and gas begins to flow out from there.The igniter is activated in the middle and ignites the pilot, and the main burner is ignited at the fully open position, so there is no chance of accidental operation. If the shaft is rotated to the front of the igniter's operating position and then stopped and left unattended, raw gas will continue to flow out from the pilot gas outlet, resulting in a gas explosion, etc. This is extremely dangerous and can lead to accidents.

In order to prevent such a dangerous situation, this invention prevents the rotating force of the operating shaft from rotating at that position even if the operating shaft is accidentally rotated to just before the igniter's operating position. The device is designed so that the return elasticity of the spring automatically rotates back to the original closed position the moment it is released.The cock body 1 has a pilot gas outlet 2 and a main gas outlet 3. The gas cock is equipped with a closure 4 that opens and closes, and the pilot gas outlet 2 and the main gas outlet 3 are sequentially opened when the igniter 6 is activated by rotation of the operating shaft 5. In addition to providing a disk-shaped spring holder 7 that rotates together with the shaft 5 and a hook 8 for activating the igniter that rotates after a certain angle rotation relative to the disk-shaped spring holder 7,
The device is characterized in that a return spring 9 is provided between the spring holder 7 and the hook 8, which applies an elastic force to return the operating shaft 5 in the closing direction and an elastic force to press the hook 8.

The details will be explained below with reference to the embodiments shown in the drawings.

The cock body 1 has a gas inlet 10, and the closure 4 has a passage 11 leading to a pilot gas outlet 2 and a main gas outlet 3.
A sub-valve 13 is provided in the closure 4 to slowly close the passage 11 to the pilot gas outlet 2, and the elasticity of the valve spring 14 causes the passage 11 to be closed late. ing.

The operating shaft 5 is attached to the operating shaft guide frame 15 with a stop ring 16 so as to be prevented from coming off, and the inner end 5a of the shaft is connected to a closing interlocking mechanism 17 within the cock body 1.

The closure interlocking mechanism 17 transmits the rotation of the operating shaft 5 to the closure 4, and at the same time as the rotation starts, pushes the valve rod 18 to open the sub-valve 13. Since this is not the purpose of this article, the details will be omitted.

The spring holder 7 has a disk or blood plate shape, and has a square hole 7a in the center that fits into the irregularly shaped part of the operating shaft 5 so that it always rotates together with the operating shaft 5, and a hole 7a on the periphery. return spring 9
It has a locking part 7b that locks one end 9a of the.

The hook 8 for activating the igniter has a protrusion 8b on a disc body 8a that activates the hammer 6a of the igniter 6, and a return spring 9 on the periphery.
It integrally has a locking portion 8C for locking the other end 9b.

In addition, an irregularly shaped mounting hole 8e with a relief part 8d is provided in the center of the disk body 8a of the hook 8, and the operation shaft 5 is inserted into this mounting hole 8e.
By fitting and inserting the irregularly shaped part, when the operating shaft 5 is rotated, it idles until it rotates by a certain angle 01, and then it rotates together with the operating shaft 5 to operate the hammer 6a. .

Also, when the operating shaft 5 is first rotated 01 times by the relief portion 8d of the hook 8, only the spring holder 7 together with the operating shaft 5 rotates 01 times until the hook 8 is locked to the hammer 6a and stopped. Therefore, at that time, a twisting force is applied to the spring 9.

Therefore, when the rotational force of the operating shaft 5 is released from 01 to within the operating range of the hammer by the hook 8, the operating shaft 5 is
rotates in the opposite direction and automatically returns to its original position.

When the rotation angle of the operating shaft 5 exceeds θ□, the hook 8 rotates and activates the hammer 6a, and further rotates together to the final position (fully open position), but the moment it comes off the hammer 6a, the spring is released. Since the biasing elasticity 9 disappears, even if you release your hand from the operating shaft 5 in this state, the operating shaft will not return to its original position and will stop at the rotational position.

Conventional gas cocks for automatic ignition are relatively small and lightweight, and can be easily operated with one touch, but because they incorporate many small parts and have a very complex internal structure, they are difficult to manufacture and assemble, and are expensive. It is inevitable that this will happen.

The present invention utilizes such a conventional gas cock, and does not change the internal structure at all by simply providing a spring holder and a hook on the external protrusion of the operating shaft, and a single tongue spring between them that serves both the pressing and torsional return forces. The automatic return mechanism for the gas cock for automatic ignition can be easily and inexpensively obtained, and since the return mechanism is exposed outside the cock body, it has practical effects such as ease of assembly and repair.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional side view of the gas cock according to this invention, Figure 2
The figure is a plan view of the cock head seen from the line A-A in Figure 1.
The figure is an exploded perspective view of main parts, and FIG. 4 is a plan view showing the relationship between the hook and the igniter hammer with respect to the operating shaft. 1... Cock body, 2... Pilot gas outlet, 3... Main gas outlet, 4...
... Closing element, 5 ... Operation shaft, 6 ... Igniter, 7 ... Spring holder, 8 ... Hook, 9 ...・Return spring.

Claims (1)

[Scope of utility model registration request] When the pilot gas outlet and main gas outlet are opened and closed on the cock body, the closing member, the operating shaft for its rotation operation, and the operating shaft operated in the opening direction are moved from the intermediate position leading to ignition to the original position. In an automatic ignition gas cock equipped with a return spring provided on the operating shaft to automatically return the operating shaft, the operating shaft is located on the outer end of the operating shaft in a portion protruding from the outer surface of the head of the cock body. A disk-shaped spring holder that rotates together.
A hook for ignition operation is provided opposite to the inner end of the operating shaft, and elasticity is provided between the spring holder and the hook to return the operating shaft to the closing direction and press the hook toward the cock body. Equipped with a return spring that acts in common,
An operating shaft return device for a gas cock, characterized in that the hook is connected to the operating shaft mounting hole 8e of the hook with a relief portion 8d that allows rotation transmission after rotation of the operating shaft.