JPH045882Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a safety device for a cassette stove.

(Prior Art) A safety device that senses an abnormal increase in the pressure of gas in a cylinder and stops the gas from flowing out is known, for example, from Japanese Patent Publication No. 57-54680. Since the above-mentioned invention enables the reset by removing the cylinder, it relies on the automatic reversal of the disc spring after the cylinder is removed. Therefore, it is important to set the reversal stroke and reversal load of the disc spring, but this setting is very difficult.

Furthermore, Japanese Patent Application Laid-Open No. 61-229109 discloses an example in which a reset means is provided to return the reversing leaf spring to its normal state. However, this invention has a structure in which a shutoff valve is provided in the middle of the primary passage, and when the pressure is high, the leaf spring is reversed through many members such as a lever operated by an actuator, and two sets of diaphragms are interposed in the middle. As a result, the response of the operation was poor and there was a problem of uncertainty, and at the same time there was a problem that the device was complicated and expensive. In addition, since the shutoff valve has a reversing leaf spring at one end and a reset member at the other end, there are restrictions on the arrangement of each member, making it difficult to simplify the structure.

(Technical Problem) The purpose of the present invention is to solve the above-mentioned problems, and not only can the outflow of gas be immediately stopped due to an abnormal increase in the pressure of gas in the cylinder, but also a reset operation can be performed to allow the gas to flow out again from the stopped state. To provide a safety device for a cassette stove that can be operated more easily than an external operating body without removing the cylinder.

Another object of the present invention is that by using an appliance stopper as an external operating body, for example, by turning the appliance stopper from open to close, the gas can be stopped and reset can be performed at the same time, thereby increasing safety. Our objective is to provide a safety device for cassette stoves.

(Technical Means) The above object is to provide the valve cylinder body 5 with a gas inlet 3 into which the valve nozzle 2 is fitted when the cylinder 1 is attached, and a gas outlet 4 which supplies gas to a burner etc.
A check valve 6, which is located in the axial direction of the valve nozzle 2 and whose one end is pushed to open by its tip, is built into the valve cylinder body 5 so as to be movable in the axial direction. Reversing spring 7 that deforms due to
are arranged in series in the axial direction so as to be in contact with the other end of the check valve 6, and a compression spring 8 acting in the closing direction of the check valve 6 is interposed between the check valve 6 and the reversing spring 7. death,
The external operating body 1 is in contact with the spring 7 which has been reversed due to high pressure.
A reset member 9 for returning the reversing spring 7 to normal state by an operation of 0 is provided on the valve cylinder body 5 on the reversing side of the reversing spring 7 in the axial direction, and a member for fixing the reversing spring 7 and the spring 7 to the valve cylinder body 5. 26 is achieved by a structure made of a material having gas sealing properties.

(Function) In the above configuration, when the cylinder 1 is set in a predetermined position, the valve nozzle 2 opens, so that gas enters the valve body 5 from the inlet 3 due to gas pressure and can flow out from the gas outlet 4. Therefore, you can ignite by operating the knob 32. If the internal pressure of the cylinder 1 rises abnormally for some reason, the reversing spring 7 will reverse due to the high pressure (4 to 6 kg/cm ² ).
It is deformed as shown by the chain line in FIG.

Therefore, the check valve 6 retreats, and since its spring 8 is weaker than the built-in spring of the valve nozzle 2, the valve nozzle 2 closes and gas outflow from the cylinder 1 is stopped.
Further, since the reversing spring 7 is arranged in a straight line in the axial direction of the nozzle shaft 2, the increased pressure acts directly on it, and the response is good.

To reset, the knob 32, which is the first external operating body 10-1 in the example of FIG. 1, and the attachment/detachment lever 33, which is the second external operating body 10-2, are operated in the example of FIG. In either case, the reset member 9 rotates and moves forward to return the reversing spring 7 to its normal state, so the check valve 6 pushes the valve nozzle 2 inward.
Gas can flow out again.

(Example) To explain with the illustrated example, the cylinder 1 is removably installed in a storage section provided on one side of the gas stove 11, and the valve nozzle 2 is fitted into the gas inlet 3 of the valve cylinder body 5. When you operate the attachment/detachment lever 33, which will be described later,
The valve nozzle 2 retracts into the cylinder, causes the gas to flow out, and feeds the gas from the gas outlet 4 to the burner 13 via the governor 12.

The valve cylinder body 5 shown in FIG. 1 includes a front part 14, a middle part 15,
A mouth ring 17 consisting of a rear part 16 and having a hole for the gas inlet 3 is attached to the front opening via an O-ring 18 and a base 19. The check valve 6 has a shaft shape with a gas passage 20 in contact with the valve nozzle 2, and a coiled compression spring 8 is housed in an intermediate cylindrical spring receiver 23, and the check valve 6 is attached to the tip head using its elastic force. O-ring 2
4 is pressurized toward the seat 25 of the front portion 14.

The reversing spring 7 has a dish shape and is attached by clamping and fixing the peripheral portion between the middle portion 15 and the rear portion 16 via a sealing member 26, and the spring 7 itself also has a sealing function. The reset member 9, which is provided so as to be able to come into contact with the center of the reversal spring 7, has a male thread 28 formed on the rear part 16 and engages with an internal thread 27, and upon rotation, moves forward by the amount that returns the reversal spring 7 to its normal state. is set to.

First external operating body 1 that drives the reset member 9
In FIG. 1, a configuration using an instrument stopper 29 is shown as 0-1. 30 is the engagement part 3 of the instrument stopper 29
1, and when the instrument stopper 29 is turned from the open position to the closed position by operating the knob 32, the reset member 9 is advanced by the required amount. FIGS. 2 and 3 show an example in which the above-described attachment/detachment lever 33 is used as the second external operating body 10-2. 34 is a support shaft of the attachment/detachment lever 33; 35 is an inclined arc-shaped groove in which a slide shaft 36 is engaged; 37 is a slide rod from which the slide shaft 36 projects; both ends are supported by supports 38 and 39; The cylinder 1 is pressed to the use position by an L-shaped protrusion 41 at the rear end that protrudes from the slide hole 40. The support shaft 3
4 is provided with a convex portion 42A and a concave portion 42B that engage with the reset member 9 and move the reset member 9 forward and backward by rotation, so that the reversing spring 7 can be returned to its original position by, for example, a detachment operation of the attachment/detachment lever 33. can.

(Effect) Therefore, according to the present invention, by operating the safety device, when the internal pressure of the cylinder increases abnormally, the outflow of gas can be immediately stopped to ensure safety, and the check valve 6 or the reverse By arranging the springs 7 in series, the response in the event of an abnormality is very good and reliable, and has the effect of significantly increasing reliability. After the safety device is activated, when the cause of the abnormality is removed and the reversing spring 7 is returned to its normal state by the external operating body 10, the knob 32 or the attachment/detachment lever 33 of the cylinder 1 can be used as the external operating body 10. , and since the reversing spring 7 is directly operated no matter which one is used, the resetting operation is easy and reliable, and there is no need to newly provide another member for resetting.
Further, since it is not necessary to attach and detach the cylinder 1 as in the conventional case, the effect of extremely good operability can be obtained.

[Brief explanation of drawings]

The drawings show the safety device for a cassette stove according to the present invention. Figure 1 is a cross-sectional view, Figure 2 is a side view of the detachable lever, and Figure 3 is a plan cross-section of an example in which the detachable lever is used as an external operating body. Figure 4 is a cross-sectional view of the support shaft,
FIG. 5 is a partially cutaway plan view. 1...Cylinder, 2...Valve nozzle, 3...Gas inlet, 4...Gas outlet, 5...Valve cylinder body, 6...
Check valve, 7...Reversal spring, 8...Compression spring, 9...
...Reset member, 10...External operating body.

Claims (1)

[Scope of utility model registration request] A gas inlet 3 into which the valve nozzle 2 is fitted when the cylinder 1 is installed, and a gas outlet 4 through which gas is supplied to a burner etc. are provided in the valve cylinder body 5, and the valve nozzle 2
A check valve 6, which is located in the axial direction of the cylinder and whose one end is pushed to open by its tip, is built into the valve cylinder body 5 so as to be movable in the axial direction, and is deformed by being directly pressurized and pushed by an increase in the internal pressure of the cylinder. A reversing spring 7 is arranged in series in the axial direction so as to be in contact with the other end of the check valve 6,
A compression spring 8 that acts in the closing direction of the check valve 6 is interposed between the check valve 6 and the reversing spring 7, and the reversing spring 7 is operated by an external operating body 10 in contact with the spring 7 which has been reversed due to high pressure. A reset member 9 for returning to normal state is provided on the valve cylinder body 5 on the reverse side of the reversal spring 7 in the axial direction, and the reversal spring 7 and a member 26 for fixing the spring 7 to the valve cylinder body 5 are made of a gas-sealing material. Safety device for formed cassette stove.