JPH0141042Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic fire extinguishing system, and particularly to an automatic fire extinguishing system suitable for combustion appliances such as kerosene stoves with upper and lower wicks.

[Prior Art] Combustion machines, such as kerosene stoves with a top-and-bottom wick, are equipped with a well-known automatic fire extinguishing system that detects a certain amount of vibration caused by an earthquake, lowers the wick, and automatically extinguishes the fire. . (Refer to Japanese Unexamined Patent Publication No. 59-128232.) This configuration will be briefly explained using FIG. 1 showing the present invention. In FIG. 1, reference numeral 1 denotes a wick adjustment shaft for moving the wick up and down, and is always biased in the rotational direction to lower the wick when the wick is raised to the combustion position. 2 is a ratchet gear fixed to this adjustment shaft 1, and a lock body 3 is rotatably supported at one end.
is locked to prevent the adjustment shaft 1 from rotating in the above-mentioned rotational direction. When the lock body 3 moves in the direction of arrow R and is unlocked, the wick adjustment shaft 1 rotates in the above-mentioned rotational direction (in the direction of the arrow), lowering the wick to the extinguishing position and extinguishing the wick. Reference numeral 16 denotes an actuation lever whose one end is rotatably supported and whose other end moves the lock body 3 in the direction of arrow (R). Reference numeral 6 denotes a weight installed in an inverted state on the pedestal 8 of the substrate 7 in order to sense vibrations, and the upper part 9 is configured to have a larger diameter than the resin lower part 10, and is provided to swing within the restoring angle range. ing. (Note that 11 is a component of the present invention that is not present in the prior art).
The movement of this weight 6 is the transmission means 15, 16, 17, 1
8 to the actuating lever 16.

According to the automatic fire extinguishing system configured as described above, when an earthquake or the like occurs, the weight 6 shakes and falls over, and the movement causes the actuation lever 16 to rotate counterclockwise via the transmission means. As a result, the lock body 3 rotates in the direction of arrow B and releases the lock, so that the wick in the combustion position is lowered to the extinguishing position and is automatically extinguished.

Therefore, even if the kerosene stove falls over due to an earthquake or the like, the fire will have been extinguished by that time, so there is an advantage that accidents such as fire can be prevented.

[Problems to be Solved] However, such an automatic fire extinguishing system has a drawback in that it cannot prevent inconveniences when a combustion device such as a kerosene stove is used in strong winds.

That is, since a combustor takes outside air into its main body and performs combustion, and exhausts exhaust gas outside the main body, when the pressure balance around the main body changes due to wind, various combustion defects occur. For example, a kerosene stove with a top-and-bottom wick mixes vaporized petroleum gas from the wick with air that flows in from the surrounding area through natural ventilation (draft action) in a combustion tube installed above the wick. If this occurs, the pressure balance around the combustion cylinder will be greatly disrupted, and the mixing balance between vaporized gas and incoming air will also be disrupted. This results in poor combustion, the generation of CO and soot, and even harmful smoke and bad odors. In particular, when the wind speed is high, there are problems in that the flame spreads significantly and the flame comes out from below the combustion tube to the outside of the appliance.

Therefore, the problem to be solved by this invention is to develop an automatic fire extinguishing system that can detect the generation of harmful gases or bad odors, or if the wind speed is high enough to cause flames to come out of the appliance, and can automatically extinguish the fire. It's about getting.

[Means for Solving the Problems] In the present invention, a wind receiving plate 11 for receiving wind is provided on the upper part of a vibration sensing weight 6 which is installed so as to topple over due to vibrations exceeding a predetermined level. Extinguishing means of the combustion machine (in Fig. 1, a wick lowering spring (not shown) that lowers the wick in the combustion position to the extinguishing position, a wick adjustment shaft 1, and a wick adjustment shaft 1 fixed to the wick adjustment shaft 1) This corresponds to the ratchet gear 2 and the lock body 3 that locks the ratchet gear 2. ) has been established.

[Function] When the wick is in the combustion position and in a burning state, when wind blows at a wind speed higher than a predetermined speed, the wind receiving plate 11 receives the wind pressure, causing the weight 6 to overturn. This fall causes the coupling mechanism to activate the fire extinguishing means of the combustor, thereby extinguishing the fire. In FIG. 1, the lock body 3 rotates in the direction of the arrow R, unlocks the ratchet gear 2, and lowers the wick to the extinguishing position, thereby extinguishing the fire.

If vibrations exceeding the specified level occur due to an earthquake, etc.,
The wick is lowered to the extinguishing position and extinguished by the same operation as when the vibration sensing weight 6 is overturned by wind.

[Example] In Fig. 1, numeral 1 indicates a wick adjustment shaft that moves the wick up and down in a wick up-and-down type oil combustion machine, and 2 is a ratchet gear inserted through this shaft 1, which is always energized in the counterclockwise direction. When the lock by the lock body 3 is released, it rotates in the direction of the arrow, allowing the shaft 1 to rotate in the direction of the arrow, thereby achieving instantaneous lowering of the core. The core is lowered by a core lowering spring that is attached to the core and is always biased in the core lowering direction, but if the ratchet gear 2 is locked by the locking body 3, rotation of the shaft 1 in the direction of the arrow is prevented. Therefore, even if the core lowering spring is activated, the core does not fall and is held in that position. This constitutes the extinguishing means. The lock body 3 is rotatably supported by a pin 4, and is biased in the direction of arrow A by a spring (not shown). Numeral 5 is a locking pin which meshes with the teeth of the ratchet gear 2 and prevents the gear 2 from rotating counterclockwise.

Next, a wind sensing mechanism that also serves as a vibration sensing mechanism will be explained. Reference numeral 6 denotes a vibration-sensing weight installed in an inverted state on a pedestal 8 of a substrate 7, the upper part 9 of which is configured to have a larger diameter than the lower part 10 made of resin, and is provided so as to swing within the restoring angle. Reference numeral 11 denotes a cross-shaped wind receiving plate fixed to the upper end of the weight 6, as shown in FIG. Reference numeral 12 is a substantially L-shaped movable plate that is rotatably supported by a mounting piece 13 formed at the lower part of the base plate 7 with a pin 14, and the middle part of this plate and the lower end of the weight 6 are connected to a chain or the like. They are connected by a connecting mechanism 15. Reference numeral 16 designates a substantially L-shaped operating lever rotatably supported on the mounting piece 13 so as to be parallel to the movable plate 12, and its free end is adjusted to the movable plate 12, leaving an operating portion. They are connected via a shaft 17. By rotating the adjustment shaft 17, the movable plate 12 and the operating lever 1 are
The distance between the lock body 3 and the lock body 3 can be adjusted freely, and by adjusting the distance, errors in mounting the lock body 3, dimensional errors during manufacturing, etc. can be absorbed. A spring 18 is wound around the outer periphery of the adjustment shaft 17 and always biases the movable plate 12 and the operating lever 16 in a direction to separate them. A protrusion 19 provided at the free end of the operating lever 16 comes into contact with the midsection of the lock body 3 to position it. The lock body 3 is such that a movable plate 12 and an operating lever 16 are rotated by the swinging of the weight 6, and the lock body 3 is operated by the free end of the operating lever 16. The actuating lever 16 is arranged so that its rotation stops at a position that does not exceed . Therefore, even after the weight 6 detects a swing and swings to operate the lock body 3, the weight 6 does not fall over and returns to its original position. In this way, the connecting mechanism 15, the movable plate 12, the adjusting shaft 18, and the operating lever 16 constitute a connecting means for displacing the lock body 3 of the fire extinguishing means.

Although the above mechanism is housed in the front cabinet of the stove body, a window is opened in a portion opposite to the wind receiving plate 11 to serve as an air intake.

Here, the operation of the present invention will be explained. Now, if vibration occurs in Figures 1 and 2,
The weight 6 detects the vibration and swings, and this swing causes the movable plate 12 to rotate counterclockwise via the coupling mechanism 15. Further, the counterclockwise rotation of the movable plate 12 is transmitted to the operating lever 16 via the adjustment shaft 17, and the operating lever 16 also rotates counterclockwise in the same way as the movable plate 12. Therefore, the lock body 3 is rotated in the direction of arrow R to release the engagement between the lock pin 5 and the ratchet gear 2. This causes the wick to drop instantly, extinguishing the fire instantly.
After that, even if the operating lever 16 attempts to rotate further counterclockwise, the end of the operating lever 16 comes into contact with the pivot 4 position of the lock body 3, preventing the operating lever 16 from rotating any further. I won't. Therefore, no matter how strong the vibration is, the weight 6 will not fall over the restoring angle range and will swing within the restoring angle range.
It does not require any reset structure or reset operation to return to its original state. In addition, when the wind is strong, the wind receiving plate 11 receives this wind and causes the weight 6 to swing due to the wind pressure. Therefore, when the wind speed exceeds a predetermined value, the operating lever 1 is moved in the same way as in the case of vibration.
6 to achieve instantaneous extinguishment. Therefore, it is possible to prevent the occurrence of bad odors and the occurrence of fires due to flames coming out of the appliance.

The movable plate 12 and the operating lever 16 are connected by an adjustment shaft 17, so even if there is a deviation in the mounting position of the lock body 3 or a manufacturing error in the parts, the movable plate 12 can be adjusted by rotating the adjustment shaft 17. The above-mentioned error can be easily absorbed by simply adjusting the distance between the actuating lever 16 and the actuating lever 16.

[Effect] According to the present invention, the automatic fire extinguishing system that automatically extinguishes the combustion machine when vibration exceeds a predetermined level has a simple configuration in which a wind catch plate is provided above the vibration sensing weight. If there is wind at a wind speed of

Therefore, the danger of poor combustion and fire caused by wind can be prevented.

[Brief explanation of the drawing]

Figure 1: Main part configuration diagram of the automatic fire extinguishing system of the present invention,
Figure 2: A perspective view of the main parts of Figure 1. Symbol, 3... Lock body, 6... Weight, 11... Wind receiving plate, 16... Operating lever.

Claims (1)

[Scope of claim for utility model registration] A fire extinguishing means for stopping combustion in a combustion machine, a vibration sensing weight installed in an inverted state so as to swing,
and a connecting means for activating the fire extinguishing means when the weight falls, characterized in that a wind plate is fixed to the upper part of the vibration sensing weight.