JPH0152629B2 - - Google Patents

Description

Detailed Description of the Invention The present invention provides an automatic ignition system in which a pilot passage and a main gas passage are opened by rotating an operating shaft, the main burner is automatically ignited by a pilot burner, and the pilot passage is closed after ignition. The invention also relates to an automatic ignition gas tank with an electromagnetic safety valve that has such a function and is equipped with an electromagnetic safety valve.

This type of automatic ignition gas tank opens the pilot passage and the main gas passage and ignites the gas automatically just by rotating the operating shaft, and there are various types that can be easily operated with a so-called one-touch operation. is proposed. However, conventional gas tanks of this type have a large number of component parts and are complicated to assemble, making it impossible to provide them at a low price.

The present invention was developed based on the above-mentioned circumstances, and its main purpose is to have a small number of parts, easy assembly, the ability to keep the pilot passage open at will, and especially accurate ignition operation. The object of the present invention is to provide a gas tank for automatic ignition that can be obtained.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings by exemplifying an electromagnetic safety valve type automatic ignition gas tank (hereinafter simply referred to as a gas tank).

FIG. 1 shows an example of a gas tank according to the present invention. This gas kottoku is kottoku main body 1
0, the closure 20, the auxiliary valve 30, and the electromagnetic safety valve 40 assembled in the Kotuku main body 10, the operation shaft 60 that operates the closure 20, the auxiliary valve 30, and the electromagnetic safety valve 40 via the operation mechanism 50, and the operation axis 6
0 and a cooperating ignition device 70.

The main body 10 includes a tapered hole 12 communicating with a gas inlet 11, a pilot passage 13 and a main gas passage 14 communicating with the tapered hole 12, respectively, and a closure 20 is assembled in the tapered hole 12. This closure 20 is airtightly and rotatably assembled in the tapered hole 12, and its rotation through approximately 90 degrees allows the gas inlet 11 and the inner hole 21 of the closure 20 to communicate with each other, thereby allowing the gas to flow through the taper hole 12. Inflow port 11 and pilot passage 1
3 and the main gas passage 14 can communicate with each other. On the other hand, an auxiliary valve 30 is passed through the closure 20 in an airtight manner and slidable in the axial direction. The auxiliary valve 30 is urged upward in the drawing by a coil spring 31 to block the inner hole 21 of the closure 20 and the pilot passage 13, and is pushed downward in the drawing against the urging force of the coil spring 31. When the inner hole 21 and the pilot passage 13 are opened, the inner hole 21 and the pilot passage 13 are communicated with each other. Furthermore, an electromagnetic safety valve 40 is airtightly assembled in the cylindrical lower inner hole 15 of the pot body 10. This electromagnetic safety valve 40 is a conventionally known safety valve, and a piston valve 42 extending movably from a valve body 41 has a coil spring 44.
3 pushes the inner hole 2 of the closure 20 upward in the drawing.
1 and the main gas passage 14, and when an electromotive force is generated in the thermocouple 44 facing the main burner, the piston valve 42 is attracted toward the valve body 41 against the urging force of the coil spring 43, and the inner The hole 21 and the main gas passage 14 are communicated with each other. Further, the lower end of the auxiliary valve 30 is slidably inserted into the upper end of the piston valve 42 as shown in the figure.
0 is pushed downward in the figure, the piston valve 42 is pushed down toward the valve body 41 by the stepped portion of the auxiliary valve 30, and the inner hole 21 and the main gas passage 14 are brought into communication. There is.

Therefore, the operating mechanism 50 includes a cylindrical cam 51,
Consisting of a rotating cylinder 52 and a pushing shaft 53, these members 51 to 53 are positioned on the same axis within the cylindrical upper inner hole 16 of the Kotoku main body 10 via respective coil springs 54 to 56, as will be described later. assembled on top. The cylindrical cam 51 is located approximately at the lower end of the cylindrical body 51a in the drawing.
A pair of inclined cam surfaces 51b are formed over a rotation range of 90 degrees and restrict the rotation range of the rotation tube 52 to approximately 90 degrees; a pair of locking protrusions 51c that fit into and engage locking grooves (not shown) extending in the direction;
An annular stepped portion 51d is provided on the inner circumferential wall of the cylinder 51a and into which the coil spring 54 is inserted and locked. Further, the rotary cylinder 52 is fitted into the cylindrical cam 51 so as to be rotatable and slidable in the axial direction, and is formed on the outer periphery of the lower part of the cylindrical body 52a as shown in the figure. A pair of locking protrusions 52b that engage, and a pair of slits 52c that constantly engage with a pair of locking protrusions 22 that are provided in the axial direction from the lower end of the cylindrical body 52a and are bored on the upper surface of the closure 20.
and a pair of stepped vertical grooves 52d each having an inclined stepped portion 52e provided in the axial direction on the inner wall of the cylindrical body 52a. The push shaft 53 is fitted into the operating shaft 60 so as to be slidable in the axial direction, and includes a pin 53b that is bored on the outer periphery of the upper end of the cylindrical body 53a and passes through a pair of slits 61 of the operating shaft 60. ing. This pin 53b, as shown in FIGS. 3 and 4,
Both ends thereof are fitted into a pair of stepped vertical grooves 52d of the rotary cylinder 52 so as to be able to move up and down, and upward movement thereof is prevented by a stepped portion 52e of the stepped vertical grooves 52d, as will be described later. Among these members, the rotating cylinder 52 is urged upward by a coil spring 55 inserted between the locking protrusion 22 of the closing member 20 and the closing member 20 in a state in which the locking projection 22 of the closing member 20 is fitted into the slit 52c. , and the closure 20 is urged downward to maintain the airtightness of the tapered hole 12 as described above. Further, the cylindrical cam 51 is provided with a locking protrusion 52b of the rotary cylinder 52 on its inclined cam surface 5.
1b, and the cylindrical cam 51 is connected to the coil spring 5 inserted between the annular stepped portion 51d and the upper mounting plate 19.
4, it is biased downward in the drawing with respect to the pot body 10. On the other hand, the push shaft 53 is fitted into the operation shaft 60 via the coil spring 56 with its pin 53b passing through the slit 61 of the operation shaft 60, and its lower end is brought into contact with the upper end of the auxiliary valve 30. ing. Further, both ends of the pin 53b are connected to the stepped vertical groove 55 of the rotating cylinder 52 as shown in FIG. 3 when not in use.
It faces the stepped portion 52e of d. In addition, the ignition device 7
0 is a conventionally known piezoelectric ignition device, which is configured to operate a piezoelectric hammer using a cam plate in conjunction with the rotation of an operating shaft 60.

In the gas tank configured in this manner, when the operating shaft 60 is rotated, the push shaft 53 and the rotating cylinder 52 are rotated approximately 90 degrees integrally with the operating shaft 60, and the closure 20 is rotated. At this time, the locking protrusion 52b of the rotating cylinder 52 is connected to the inclined cam surface 51 of the cylindrical cam 51.
b, the rotating cylinder 52 is lowered while rotating, and both ends of the pin 53b of the pushing shaft 53 are pushed toward the left in FIG. 3 by the end surface of the slit 61 of the operating shaft 60. Since it is rotated and locked to the stepped portion 52e of the stepped vertical groove 52d of the rotating barrel 52, the pushing shaft 53 is also lowered together with the rotating barrel 52, pushing the auxiliary valve 30 downward. At the same time, electromagnetic safety valve 4
Push the piston valve 42 of No. 0 downward. As a result, the inner hole 21 of the closure 20 and the gas inlet 11 communicate with each other, and at the same time, the pilot passage 13 and the main gas passage 14 communicate with the inner hole 21, and the pilot burner is ignited by the operation of the ignition device 70. At the same time, the main burner is ignited. When the main burner is ignited and an electromotive force is generated in the thermocouple 44, the piston valve 4
2 is attracted toward the valve body 41, and the electromagnetic safety valve 40 maintains its open state by itself. In this state, the operating shaft 60
When you release your hand and lose the rotational force of the push shaft 53,
The pressing force of the end face of the slit 61 against the pin 53b disappears, and the locking between both ends of the pin 53b of the pushing shaft 53 and the stepped portion 52e of the stepped vertical groove 52d of the rotary cylinder 52 is released, and as a result, the auxiliary valve 30 returns and closes due to the biasing force of the coil spring 31, and the closing member 20
The pilot burner is extinguished by cutting off communication between the inner hole 21 and the pilot passage 13. At the same time, the auxiliary valve 30 pushes the push shaft 53 upward. Pin 53b of push shaft 53 in this state
is the position shown in FIG.

On the other hand, when the operation shaft 60 is reversely rotated from this state, the push shaft 53 and the rotating cylinder 52 are rotated in the reverse direction integrally with the operation shaft 60, which causes the closing member 20 to rotate in the reverse direction and the gas flow. Communication between the inlet 11 and the inner hole 21 is cut off. As a result, the main burner is extinguished, and at the same time the thermoelectromotive force disappears, the piston valve 42 returns, and communication between the inner hole 21 and the main gas passage 14 is cut off. During this time, the locking protrusion 52b of the rotating cylinder 52 is urged by the coil spring 55, and the cylindrical cam 51
In order to slide on the inclined cam surface 51b of
2 is pushed upward on the coil spring 55 and returns to the state shown in FIG.

In this manner, in this gas tank, the auxiliary valve 30 can be held open for any desired period of time, so the ignition by the pilot burner of the main burner and the pressing and holding of the electromagnetic safety valve 40 are reliable, making it an extremely safe gas tank. In addition, the operating mechanism 50 is composed of members with a simple structure such as a cylindrical cam 51, a rotating cylinder 52, and a pushing shaft 53, and the number of parts is small and each can be loosely inserted on the same axis. Therefore, it is extremely easy to assemble and the cost is significantly reduced compared to the conventional method. In addition, in this gas tank, the cylindrical cam 51 can be pushed upward against the biasing force of the coil spring 54, so that the piston valve 42 of the electromagnetic safety valve 40 moves toward the valve body at the end of the rotation operation of the operating shaft 60. 4
1, this strong pressing force is transmitted to the cylindrical cam 51 via the auxiliary valve 30, the pushing shaft 53, and the rotating cylinder 52, and is absorbed by the coil spring 54. As a result, the electromagnetic safety valve 40 is not subjected to an unnecessarily large pressing force, but is subjected to a constant pressing force due to the elastic force of the coil spring 54, and the pressing force does not damage the electromagnetic safety valve 40, the auxiliary valve 30, etc. There is an effect that can always be constant.

In the above description, an automatic ignition gas tank equipped with an electromagnetic safety valve has been exemplified, but the present invention is of course also applicable to an automatic ignition gas tank without an electromagnetic safety valve. In this case,
The inner hole 21 of the closure 20 and the main gas passage 14 may be directly communicated with each other.

In summary, the present invention consists of, firstly, a closure that is rotatably assembled within the main body of the gas tank and opens and closes the main gas passage; and a closure that is movably assembled within this closure that opens and closes the pilot passage. An automatic ignition gas tank comprising an auxiliary valve, an operating shaft that rotates the closure via an operating mechanism and pushes the auxiliary valve, and an ignition device that cooperates with the rotating operation of the operating shaft, The operating mechanism is comprised of a cylindrical cam that is non-rotatably assembled in the main body and has an inclined cam surface formed at the lower part over a predetermined range, and a cylindrical cam that is loosely fitted into the cylindrical cam 51 and is elastically mounted on the closing member. The cylindrical cam is provided with an engaging protrusion that is resiliently supported and rotatably assembled integrally with the closing member and resiliently engages with the inclined cam surface of the cylindrical cam, and is rotated by the action of the inclined cam surface. A rotary cylinder whose movement range is regulated within a predetermined range and which descends along the inclined cam surface when rotated, and the auxiliary valve is loosely fitted in the operating shaft so as to be pushable and provided in the axial direction thereof. a push shaft that passes through a slit and includes a pin having both ends fitted into stepped vertical grooves provided in an inner wall of the rotary tube, and rotates the rotary tube when the operating shaft is rotated; and the stepped portion of the stepped vertical groove is formed in a shape in which the pin is removably locked, so that when the operating shaft is rotated in one direction, the pin is rotated by the operating shaft. The gas tank for automatic ignition is characterized in that it is pressed against and locked by the stepped portion. The second invention also provides a closer that is rotatably assembled within the main body of the gas tank and opens and closes the main gas passage, and an auxiliary valve that is movably assembled within the closure and opens and closes the pilot passage. an electromagnetic safety valve that is assembled to the downstream side of the main gas passage of the closure to open and close it; and a valve of the electromagnetic safety valve that rotates the closure and pushes the auxiliary valve through an operating mechanism. In an automatic ignition gas tank equipped with an operating shaft that forces the opening of the operating shaft by pushing a body, and an ignition device that cooperates with the rotating operation of the operating shaft, the operating mechanism is rotated within the main body of the operating shaft. a cylindrical cam that is immovable and is assembled in an upwardly biased state via a spring, and has an inclined cam surface formed over a predetermined range at the lower part;
An engagement member that is loosely fitted into the cylindrical cam, is elastically supported on the closing member, is integrally assembled to the closing member so as to be rotatable, and elastically engages with the inclined cam surface of the cylindrical cam. a rotary cylinder having a protrusion, whose rotation range is restricted to a predetermined range by the action of the inclined cam surface, and whose rotation time descends along the inclined cam surface; A pin is fitted loosely so that the valve body can be pushed, passes through a slit provided in the axial direction of the valve body, and has both ends fitted into stepped vertical grooves provided in the inner wall of the rotary cylinder, and is actuated by rotation of the operating shaft. a pushing shaft that rotates to rotate the rotating cylinder, and a stepped portion of the stepped vertical groove is formed in a shape in which the pin is removably locked, and the operating shaft The automatic ignition gas tank is characterized in that when the pin is rotated in one direction, the pin is pressed and locked against the stepped portion by the same operation shaft.

Therefore, according to the present invention, it is possible to provide an automatic ignition gas tank with good operability, reliable operation of the auxiliary valve, and safety with a small number of parts and easy assembly, thereby reducing the cost of the automatic ignition gas tank. can be significantly reduced.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of the automatic ignition gas tank according to the present invention, Fig. 2 is a perspective view showing each component of its operating mechanism, and Figs. 3 and 4 are exploded views showing the inner wall of the rotating cylinder. It is. Explanation of symbols, 10...Kotuku body, 20...Closet,
30... Auxiliary valve, 40... Electromagnetic safety valve, 50... Operating mechanism, 51... Cylindrical cam, 51b... Inclined cam surface,
52... Rotating tube, 52b... Locking protrusion, 52d... Stepped vertical groove, 52e... Step portion, 53... Push shaft, 53b... Pin, 54, 55... Coil spring, 60... Operating shaft, 70... Ignition device .

Claims (1)

[Scope of Claims] 1. A closure that is rotatably assembled within the main body of the gas tank and opens and closes the main gas passage, and an auxiliary valve that is movably assembled within this closure and opens and closes the pilot passage. , an automatic ignition gas tank comprising an operating shaft for rotating the closure and pushing the auxiliary valve via an operating mechanism, and an ignition device that cooperates with the rotating operation of the operating shaft, the operating mechanism; a cylindrical cam that is non-rotatably assembled in the main body and has an inclined cam surface formed over a predetermined range at the lower part; The cylindrical cam includes an engaging protrusion that is supported and integrally rotatably assembled to the closing member and elastically engages with the inclined cam surface of the cylindrical cam, so that the rotation range is limited by the action of the inclined cam surface. a rotating cylinder that is regulated within a predetermined range and descends along the inclined cam surface when rotating;
The auxiliary valve is loosely fitted into the operating shaft so that the auxiliary valve can be pushed, the pin passing through a slit provided in the axial direction and having both ends fitted into stepped vertical grooves provided on the inner wall of the rotating cylinder. and a push shaft that rotates by rotating the shaft to rotate the rotary cylinder,
and the stepped portion of the stepped vertical groove is formed in a shape in which the pin is removably locked, so that when the operating shaft is rotated in one direction, the operating shaft causes the pin to engage with the stepped portion. A gas cock for automatic ignition characterized by being pressed and locked. 2. A closure that is rotatably assembled into the main gas passage to open and close the main gas passage, an auxiliary valve that is pushably assembled within this closure to open and close the pilot passage, and a closure for the main gas passage. An electromagnetic safety valve that is assembled on the downstream side of the closure to open and close it, and an operating mechanism that rotates the closure and pushes the auxiliary valve and pushes the valve body of the electromagnetic safety valve. In an automatic ignition gas tank equipped with an operating shaft that forcibly pushes open and an ignition device that cooperates with the rotational operation of this operating shaft, the operating mechanism is fixed inside the barrel main body and is not rotatable, but is connected via a spring. a cylindrical cam that is assembled in an upwardly biased state and has an inclined cam surface formed over a predetermined range at its lower part; An engaging protrusion is integrally and rotatably assembled to the closing member and elastically engages with the inclined cam surface of the cylindrical cam, and the rotation range is limited to a predetermined range by the action of the inclined cam surface. a rotating cylinder that is regulated by the angle of rotation and descends along the inclined cam surface when rotating; and a slit provided in the axial direction of the operating shaft into which the auxiliary valve and the valve body are loosely fitted so as to be pushable. and a push shaft that is provided with a pin that penetrates through the shaft and has both ends fitted into stepped vertical grooves provided in the inner wall of the rotary tube, and rotates when the operating shaft is rotated to rotate the rotary tube. and the stepped portion of the stepped vertical groove is formed in a shape in which the pin is removably locked, so that when the operating shaft is rotated in one direction, the operating shaft causes the pin to be locked in the stepped position. A gas tank for automatic ignition, characterized in that it is pressed against and locked.