JP2002089804A - Gas burner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas burner which enables one-hand operation in igniting gas and quenching combustion gas. SOLUTION: A burner body 1 is provided with a first gas hole 7, a second gas hole 8, an on-off valve V2 fixed between the first gas hole 7 and the second gas hole 8, a valve control piston which constitutes a valve control device D for opening and closing the on-off valve V2 and which is divided into front and rear valve control pistons 25, 31 by a separating sheet 17, and an ignition piston 15 for permitting the pistons 25, 31 to move backward in interlock with the backward movement of the piston 15 itself.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas burner for igniting and burning gas supplied from a gas cylinder and ejected from a burner tube.

[0002]

2. Description of the Related Art A conventional gas burner A 'will be described. As shown in FIG. 17, this gas burner A '
A burner body 53 provided with a gas hole 52 therein for connecting a gas supplied from the gas cylinder B at a high pressure to the nozzle 51 via a regulating valve V ′.
A burner tube 54 attached to the tip of the burner main body 53; and an ignition device C for igniting the gas ejected from the nozzle 51 in the burner tube 54. When a heating operation is performed using this gas burner A ', it is performed as follows.

[0003] When the gas burner A 'and the gas cylinder B are connected, the cylinder open / close valve 55 of the gas cylinder B is opened,
The gas in the gas cylinder B is supplied to the gas holes 52 at a high pressure. Here, the adjustment valve V ′ is operated to operate the needle valve 56.
Is opened, and the gas in the gas hole 52 is ejected from the nozzle 51. When the ignition device C is operated in this state, the burner tube 54
The gas ejected from the tip of the is ignited. Thereafter, the control valve V 'is operated again to adjust the size of the flame of the combustion gas and the like.

The conventional gas burner A 'has the following problems. (1) In a normal case, the operator operates the regulating valve V ′ with one hand and operates the ignition device C with the other hand.
That is, both hands must be used to ignite the blast gas. (2) The gas is ignited while the gas is jetted from the nozzle 51. For this reason, the gas is wastefully consumed between the time when the gas is ejected and the time when the gas is ignited.
(3) When adjusting the size of the flame or extinguishing the combustion gas, the adjustment valve V 'must be operated in a state where the gas is burned, so it is difficult to achieve safety. (4) The regulating valve V ′ is closed to extinguish the combustion gas. For this reason, the flow rate of gas must be adjusted each time it is used.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides an operation for igniting gas in a gas burner and a method for igniting a combustion gas by supplying gas to a burner tube in conjunction with operation of an ignition device. The task is to enable one-handed fire extinguishing work.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a gas cylinder having a base portion provided with a connecting portion for opening a cylinder opening / closing valve, and having a connecting portion therein. A burner body provided with a gas hole, a straight tubular burner tube provided at a tip portion of the burner body, and provided in the middle of a gas hole of the burner body to guide gas to the burner tube; An adjusting valve for adjusting the amount of gas supplied to the burner tube, an ignition device for igniting the gas guided to the burner tube, and a back and forth movement with respect to the burner body to operate the ignition device In a gas burner provided with an ignition lever to be operated, an on-off valve provided between the connection portion and the adjustment valve in the gas hole, and a valve operation piston moved forward and backward in conjunction with an ignition operation of the ignition lever, The gas hole A valve operating device for opening and closing the holds the opened state of the on-off valve is characterized in that a fire-extinguishing device for extinguishing which was closed.

When using the gas burner according to the present invention,
The procedure is as follows. When the burner main body and the gas cylinder are connected, the cylinder open / close valve is opened, and the gas in the gas cylinder is supplied to the burner main body. However, an on-off valve is provided between the connection portion of the burner body and the regulating valve, and the on-off valve is closed in a normal state. Here, when the ignition lever of the ignition device is operated, the valve operation piston is moved forward and backward in conjunction therewith, and the on-off valve is opened. Therefore, the gas in the gas cylinder is ejected from the burner pipe via the on-off valve held in the open state, and the ignition device is activated to ignite the gas ejected from the burner pipe. That is, the operation for operating the ignition device and the operation for opening the gas flow path in the on-off valve device are performed in conjunction with each other. Moreover, since the fire extinguishing device for extinguishing the burning gas is provided, the operator can perform both the ignition and the fire extinguishing operation with one hand.
Further, since the gas flow rate can be kept constant, it is not necessary to adjust the regulating valve every time the operation is performed. For this reason,
The adjustment state is constant, the required flame length and the like are constant, the uniformity of work such as heating is improved, and gas at the time of ignition can be saved.

[0008] When the cylinder chamber accommodating the valve operation piston is divided into two parts by a separation sheet made of a flexible material, and the valve operation piston is divided into two parts by sandwiching the separation sheet, a gas hole is formed. The airtightness of the provided cylinder chamber is maintained by the separation sheet.
For this reason, it is not necessary to attach an “O-ring” to the valve operation piston on the side where the gas hole is not provided for airtightness between the valve operation piston and the cylinder chamber. Can be reduced. As a result, the force required to open the on-off valve is small.

A compression spring for shortening a stroke of a valve body constituting an on-off valve is elastically provided between the first piston split body located on the ignition lever side and the isolation sheet among the two divided valve operation pistons. In this case, the stroke of the valve body can be made shorter than the stroke of the ignition lever. That is, in the non-use state of the valve operating device, the elastic restoring force of the device-side compression spring is set smaller than the elastic restoring force of the valve-side compression spring that keeps the on-off valve closed.
At the time of opening the on-off valve, when the first piston split body is retracted by the retraction of the ignition lever, only the device-side compression spring is compressed, and its elastic restoring force is equal to the elastic restoring force of the valve-side compression spring. Become. In this state, when the first piston split body is further retracted, the device-side compression spring is further retracted while being further compressed, so that the elastic restoring forces of the device-side and valve-side compression springs are reduced. While maintaining the same state, the valve element of the on-off valve is retracted by retreating the first piston split body, and the on-off valve is opened.

In the above operation, the relationship of (stroke of the first piston split body = compression amount of the device-side compression spring + stroke of the valve body of the on-off valve) is established. The first compression spring
It can be shorter than the stroke of the piston split body. By doing so, the stroke of the valve body can be minimized, and the size of the entire gas burner can be made compact.

The above operation will be considered from the side of the ignition device. The ignition device operates at a portion near the retreat end of the piston constituting the ignition device. The on-off valve is opened in the first
Because it is set before the retreat end of the piston split body,
Before the ignition device is activated. When the on-off valve is opened, the gas instantaneously reaches the burner tube due to the gas pressure, so that the ignition device operates after the gas is led to the burner tube. Therefore, the gas can be reliably ignited.

A large-diameter portion is provided at an end on the separation sheet side of the second piston split body on the side of the on-off valve that divides the piston into two, and when the on-off valve is opened, the large-diameter portion opens and closes. The gas supplied to the valve chamber of the on-off valve in close contact with the seat surface opposite to the valve seat of the valve flows into the regulating valve side through a gas groove formed on the back surface of the large diameter portion. In the case of the configuration, the gas flows only from the gas groove portion. In this way, by reducing the gas ejection amount, it is possible to reliably ignite even when the gas cylinder is at a high pressure.

[0013] The fire extinguishing device may be engaged with a plurality of engaged portions provided in a longitudinal direction of the valve operating piston and any one of the plurality of engaged portions to prevent the valve operating piston from retreating. When the urging means includes an engaging member capable of holding the engaged state and a release button for releasing the engaged state, the on-off valve can be held in an open state. Therefore, the operator does not need to apply a force to the ignition lever during the heating operation. Further, in order to extinguish the combustion gas, it is only necessary to press the release button, so that the operation is extremely easy and the fire is extinguished quickly.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to embodiments. Figure 1 is an overall perspective view of a gas burner A ₁ of the first embodiment of the present invention, FIG. 2 is a front view also showing the use state, Figure 3 is a front sectional view of a gas burner A ₁ of the first embodiment, FIG. 4 FIG. 3 is an enlarged sectional view taken along line XX of FIG. 3, FIG. 5 is a perspective view of the fire extinguisher E, and FIG. At first,
It will be described the overall configuration of a gas burner A ₁ of the first embodiment. As shown in FIGS. 1 to 3, a straight tubular burner tube 2 is attached to the tip of a pistol-shaped burner main body 1 constituting a gas burner A ₁ of the first embodiment. A connecting portion 4 is provided at a base end portion of the connecting portion 4 and connected to the gas cylinder B to open the cylinder opening / closing valve 3. A valve opening / closing pin 5 made of a thin pipe material is attached to the inside of the connecting portion 4 along the vertical direction, and the valve opening / closing pin 5 presses the cylinder opening / closing valve 3 of the gas cylinder B, whereby the cylinder is opened. On-off valve 3 is opened,
The gas filled in the gas cylinder B at high pressure is burner body 1
This is the configuration supplied to The outer portion of the burner main body 1 is covered with a cover member 6.

[0015] As shown in FIG.
A plurality of gas holes communicating with the valve opening / closing pin 5 (in the case of this embodiment, first to third gas holes 7, 8, 9).
Is provided at the tip of the third gas hole 9.
1 is attached. The gas supplied from the gas cylinder B is guided to the nozzle 11 through each of the gas holes 7, 8 and 9, and is ejected from the tip of the burner tube 2. An adjusting valve V ₁ is provided between the second gas hole 8 and the third gas hole 9. This adjustment valve V ₁ rotates a flow rate adjustment knob 12 protruding outside the burner main body 1 in a predetermined direction,
Opening (size of gap between needle valve 13 and opening 14)
Is adjusted to adjust the flow rate of the gas guided to the nozzle 11.

An ignition device C is mounted below the nozzle 11 of the burner main body 1 along the front-rear direction of the burner main body 1. This ignition device C retreats the ignition piston 15 along the front-back direction of the burner main body 1,
Then, piezoelectric ignition is performed near the retreat end to ignite the gas ejected from the burner tube 2. The ignition piston 1
5 is fixed to the back side of an ignition lever 16 provided in front of the ignition device C.

The first gas hole 7 in the burner main body 1
Between the second gas hole 8 and the on-off valve V _TwoIs provided
In front of it, with an isolation sheet 17 (described later) in between.
A split valve operating device D is provided. On-off valve
V_TwoWill be described. As shown in FIGS. 3 and 4
First and second gas holes 7 and 8 in the burner body 1
Between the ignition lever 16 and the front of the burner body 1.
An opening hole is formed along the rear direction. This opening hole
Is a front opening hole 1 having a female screw 18a at the opening.
8 and a bottomed rear opening hole continuously provided in the rear part
19 The front opening 18 is provided in the rear opening 1.
9 is larger than 9 and is connected to the rear opening 19.
Has a mortar-shaped connecting portion 18b. Soshi
Thus, the front opening hole 18 communicates with the second gas hole 8,
The rear opening hole 19 communicates with the first gas hole 7.

A valve seat 21 is mounted on the connection portion 18b of the front opening hole 18. The valve seat 21 has a cylindrical peripheral wall portion 22 opened forward and the connecting portion 18.
b, and a substantially conical abutment portion 23 that abuts on b. The corresponding contact portion 23 corresponds to the mortar shape of the connection portion 18b. In the valve seat 21, an O-ring 24 is attached to a base portion of the contact portion 23 so that the connection portion 18b is airtight. Further, a piston insertion hole 21a for inserting a rear valve operating piston 25 constituting a valve operating device D (described later) is provided in an axis portion of the valve seat 21. Therefore, the valve seat 21
Has also a function as a cylinder.

The overall length of the rear valve operating piston 25 is substantially the same as the overall length of the valve seat 21. Therefore, in a normal state (non-use state of the gas burner A _1), the rear end of the rear valve operating piston 25 is disposed substantially in the same vertical plane as the side seat surface 21b after the valve seat 21. In the rear valve operation piston 25, a portion (piston head 25a) that comes into contact with the isolation sheet 17 is larger than an outer diameter of a portion inserted into the piston insertion hole 21a of the valve seat 21, and It is housed in a piston chamber 20 provided at the front of the seat 21. Naturally, the rear valve operating piston 2
The outer diameter of the portion of the piston insertion hole 21 inserted through the piston insertion hole 21a is smaller than the inner diameter of the piston insertion hole 21a, so that gas can flow through the gap between the two. Further, a gas flow hole 22a is provided in the peripheral wall portion 22 of the valve seat 21 in a direction perpendicular to the axis. In FIG. 4, reference numeral 27 denotes a cushion member for preventing the front seat surface 21c of the valve seat 21 from coming into contact with the piston head 25a of the rear valve operating piston 25 with an impact force.

As shown in FIG. 4, the rear end of the valve seat 21 enters the rear opening 19. A valve body 26 having an outer diameter slightly smaller than the inner diameter is disposed in the rear opening hole 19, and a compression spring (valve body) is provided between the valve body 26 and the bottom of the rear opening hole 19. The return spring 28) is mounted. For this reason, the front end face of the valve element 26 is in close contact with the rear seat face 21 b of the valve seat 21 by the elastic restoring force of the valve element return spring 28. In this state, the piston insertion hole 21a in the valve seat 21 is closed. That is, the opening and closing valve V ₂ is closed.

Next, a description will be given valve operating device D for opening and closing the on-off valve V _2. As shown in FIGS. 3 and 4, in front of the opening and closing valve V _2, is mounted a valve operating device D. The valve operating device D is provided with the above-described isolation sheet 1
7, a rear valve operating piston 25, a cylindrical cylinder 29 having a cylindrical chamber 29a formed therein, a front valve operating piston 31 slidably mounted in the cylinder chamber 29a, and the front valve It comprises a compression spring (valve operation spring 33) elastically mounted between the operation piston 31 and the spring receiver 32. The valve operating device D includes a male screw 29b provided on an outer peripheral surface of a rear end portion of the cylinder cylinder 29.
Is attached to the burner main body 1 by being screwed into the female screw 18 a of the front opening hole 18.

The separating sheet 17 is made of a flexible material such as a rubber material, and can be expanded and contracted in almost all directions. And the piston chamber 20 of the valve seat 21
And keeps the airtightness and isolation between the cylinder chamber 29 and the cylinder chamber 29a. This isolation sheet 17
Is a single valve operating piston (front valve operating piston 31).
And the rear valve operating piston 25 are integrated, the airtightness of the piston chamber 20 is maintained by maintaining the airtightness between the outer peripheral surface and the inner peripheral surface of the cylinder chamber 29a. It is an airtight holding member used in place of the “O-ring”. For this reason, when the isolation sheet 17 is used, a single valve operation piston cannot be used, so that a structure in which the valve operation piston is bisected on both sides of the isolation sheet 17 is adopted. In the embodiment, the two valve operating pistons are the front valve operating piston 31 and the rear valve operating piston 25. Therefore, in the first embodiment, the front valve operating piston 31 and the rear valve operating piston 25 constitute a valve operating piston.

A front valve operating piston 31 and a spring receiver 32 disposed in front of the separating seat 17 behind the front valve operating piston 31.
, A compression spring (valve operation spring 33) is elastically mounted. The elastic restoring force when the valve operating spring 33 is attached is smaller than the elastic restoring force when the valve body return spring 28 is attached. The front end of the front valve operating piston 31 is
6 are connected in a state of being fitted into a housing hole 16a provided on the back side of the housing 6. When the ignition lever 16 is pressed, the front valve operating piston 31 is retracted. When the elastic restoring force of the valve operating spring 33 becomes equal to the elastic restoring force of the valve body return spring 28, the valve operating spring 33 retreats the spring receiver 32 while being further compressed. At this time, the spring receiver 32 is retracted while pushing the separation sheet 17 backward. For this reason, the rear end of the spring receiver 32
It has a spherical shape so as not to damage the separation sheet 17. When the spring receiver 32 is retracted, the rear valve operating piston 25 is retracted via the separation sheet 17.

In front of the valve operating device D, a fire extinguisher E is provided. This fire extinguisher E has an on-off valve V ₂
The open state has a locking function of holding remains (gas flow path is a state where opened), the two functions of the extinguishing function of extinguishing the combustion gases closing the on-off valve V _2. The fire extinguisher E will be described. As shown in FIGS. 4 to 6, in the front valve operation piston 31, the cylinder cylinder 29
The first and second stopper portions 34 and 35 cut along the circumferential direction are continuously formed in the portion protruding from the first portion. An engagement spring 36 is attached to the cover member 6 to enter the first stopper portion 34 and engage and hold the front valve operation piston 31 in that state. The engagement spring 36 is formed by bending a leaf spring so that the cross section thereof is substantially triangular. The board portion 36a is fixed to the cover member 6 and the top 3
6b has entered the first stopper portion 34. FIG.
When the ignition lever 16 is pushed to retract the front valve operation piston 31 against the elastic restoring force of the engagement spring 36, the top 36b of the engagement spring 36
Side. As shown in FIG. 8, when the ignition lever 16 is further depressed, the top portion 36 of the engagement spring 36 is pressed.
b enters the second stopper portion 35 by its own elastic restoring force. The front valve operating piston 31 is engaged and held in a state where the top 36b of the engagement spring 36 enters the second stopper 35 (see FIG. 10).

The front valve operating piston 31 is released from the engagement with the engagement spring 36 by pressing the fire extinguishing button 37. As shown in FIGS. 4 to 6, the fire extinguishing button 37 is attached to one side of a rectangular plate-shaped substrate 38, and a pair of push plates 41 are provided at upper and lower ends of the other side of the substrate 38. Installed. A pair of push plates 41
Are for pressing the engagement springs 36, and the distance between them is slightly larger than the outer diameter of the portion of the front valve operation piston 31 protruding from the cylinder cylinder 29.
Further, portions (abutting portions 41a) of the pair of push plates 41 opposed to the engagement springs 36 are cut off corresponding to the shape of the tops 36b of the engagement springs 36. By doing so, the contact portion 41a of each push plate 41 and the engagement spring 36
The contact surface with the top portion 36b increases, and the engagement spring 36 can be pressed in a stable state. This fire button 37
As shown in FIGS. 1 and 2, when attached to the cover member 6, the hemispherical tip is configured to protrude from the cover member 6. Moreover, the fire extinguishing button 37, as can easily be operated with the operator grips the gas burner A ₁ with the right hand, it is disposed in the vicinity of the right thumb.

[0026] The description of the operation of the gas burner A ₁ of the first embodiment of the present invention. As shown in FIGS. 1 to 3, the burner body 1 in the gas burner A ₁ is coupled to the gas cylinder B. Since the valve opening / closing pin 5 provided on the connecting portion 4 of the burner body 1 presses the cylinder opening / closing valve 3 of the gas cylinder B, the cylinder opening / closing valve 3 is opened, and the gas filled in the gas cylinder B is filled with the gas. Supplied to Since this gas is filled in the gas cylinder B at a high pressure, the first
The gas is supplied instantaneously to the rear opening 19 through the gas hole 7. Normal state (non-use state of the gas burner A ₁₎
In a side seat surface 21b and the valve body 26 after the valve seat 21 are in close contact (i.e., on-off valve V ₂ is closed), so does not flow out from the gas rear opening hole 19. Further, the gap between the needle valve 13 and the opening hole 14 of the control valve V ₁ was previously, length, etc. of the flame of the combustion gas is adjusted to be proper state. In this state, when the operator grips the gas burner A ₁ with the right hand, the index finger ignition lever 1
6 and its thumb is arranged near a fire extinguishing button 37 constituting the fire extinguishing device E.

The operation of the gas burner A _{1 at} the time of ignition will be described. As shown in FIG. 7, when the ignition lever 16 is retracted, the front valve operation piston 31 is retracted against the elastic restoring force of the engagement spring 36 in conjunction with the ignition piston 15. Here, the elastic restoring force (F ₁ ) of the valve operating spring 33 when the front valve operating piston 31 and the spring receiver 32 are mounted on the cylinder cylinder 29 is determined by the fact that the valve element 26 has the front opening hole 1.
8 is smaller than the elastic restoring force (F ₂ ) of the valve element return spring 28. That is, (F ₁ <F ₂ ).
Therefore, even if the front valve operation piston 31 is retracted, the two elastic restoring forces (F ₁ , F ₂ ) become equal (F ₁ = F).
Until ₂ ), the close contact state between the rear seat surface 21b of the valve seat 21 and the valve body 26 is maintained as it is.

As shown in FIG. 8, when the front valve operating piston 31 is retracted, the elastic restoring force (F ₁ ) of the valve operating spring 33 increases and the elastic restoring force (F ₂ ) of the valve body return spring 28 increases. ). In this state, when the front valve operation piston 31 is further retracted, the entire valve operation spring 33 is retracted while being further compressed. For this reason, the rear valve operation piston 25 is retracted via the separation sheet 17 while maintaining the state where the respective elastic restoring forces (F ₁ , F ₂ ) of the valve operation spring 33 and the valve element return spring 28 are equal. As a result, the valve element 26 is retracted, and the on-off valve V ₂
Is opened. Then, as shown in FIG. 9, the gas guided from the gas cylinder B to the front opening 18 becomes the piston insertion hole 21 a of the valve seat 21 and the rear valve operating piston 25.
Into the piston chamber 20 through the gap between the gas flow hole 2
The gas is instantaneously guided to the burner tube 2 via the gas holes 8 and 9 and the nozzle 11.

In the above operation, the relationship of (stroke of the front valve operating piston 31 = compression amount of the valve operating spring 33 + stroke of the valve element 26) is established. Stroke of the valve body 26 constituting the opening and closing valve V _2, since the on-off valve V ₂ is sufficient if it is opened and closed, may be small. As described above, the stroke of the valve body 26 is equal to the stroke of the entire bisected valve operation piston if only one valve operation piston is bisected in the longitudinal direction at the portion of the isolation sheet 17, which is more than necessary. Becoming longer, the on-off valve V ₂ in the burner body 1
The space in the area becomes larger than necessary. Therefore, the front valve operating piston 31 on the valve operating device D side and the isolation sheet 1
7, the stroke of the valve body 26 is shortened by the compression amount of the valve operation spring 33 from the stroke of the front valve operation piston 31. By doing so, it is possible to make the size of the entire gas burner A ₁ in compact.

The above operation will be considered from the ignition device C side. The ignition device C operates at a portion near the retreating end of the ignition piston 15 constituting the ignition device C. The front valve operation piston 31 is retracted in conjunction with the retraction of the ignition piston 15. Here, since the on-off valve V ₂ is opened (the valve body 26 moves) it is is set before the rear end of the front valve operating piston 31, the ignition device C
Before it is activated. That is, by the opening and closing valve V ₂ is opened, filled with high pressure gas in the gas cylinder B, instantly reach the burner pipe 2 by the gas pressure, it is ignited after the gas is introduced into the burner tube 2 As a result, the gas is reliably ignited.

Next, a description will be given of the operation when using the gas burner A _1. As shown in FIGS. 7 and 8, when the front valve operation piston 31 is retracted, the top portion 36 b of the engagement spring 36 constituting the fire extinguishing device E moves from the first stopper portion 34 of the front valve operation piston 31. It comes off and enters the second stopper portion 35. After reaching the retreat end, the front valve operation piston 31 is advanced by the respective elastic restoring forces of the valve element return spring 28 and the valve operation spring 33. But,
Because with the engaging spring 36 and the second stopper portion 35 is engaged, the front valve operating piston 31 is more advanced crippled becomes a state where the opening and closing valve V ₂ is opened is maintained (fire extinguisher E Lock function). Gas burner A ₁ of the first embodiment
Then, as shown in FIG. 10, the rear seat surface 2 of the valve seat 21 is provided.
In order to make the gap between the valve body 1b and the valve body 26 as short as possible, the second stopper portion 35 and the engagement spring 36 are configured to be engaged at a position slightly returned from the retracted end position of the front valve operation piston 31. ing.

The front end of the above-mentioned front valve operating piston 31 merely fits into the housing hole 16 a provided in the ignition lever 16. For this reason, when the ignition lever 16 is pushed and the front valve operation piston 31 is retracted, the front end thereof is retracted while being fitted in the accommodation hole 16a, and the front valve operation piston 31 is retracted. Radial deviation is prevented. As shown in FIG. 9, in a state where the ignition lever 16 is pushed and the front valve operation piston 31 is retracted, and the second stopper portion 35 and the engagement spring 36 are engaged, only the ignition lever 16 is engaged. Can be returned to the original position. This prevents the ignition piston return spring (not shown) provided in the ignition device C from being maintained in the biased state during the heating operation.

Next, the operation of the gas burner A _{1 at} the time of fire extinguishing will be described. As shown in FIGS. 5 and 6, when the fire extinguishing button 37 constituting the fire extinguishing device E is pressed, the top portion 36 b of the engaging spring 36 is moved by the pair of push plates 41.
6a. And the top 36b is the second
When the front valve operating piston 31 is separated from the stopper portion 35, the front valve operating piston 31 is advanced by the elastic restoring force of the valve element return spring 28 and the valve operating spring 33. Therefore, the valve body 26 is in close contact with the re-side seat surface 21b after the valve seat 21, closing valve V ₂ is closed. The engagement spring 36 is held in a state of being inserted into the first stopper portion 34 of the front valve operation piston 31. Thus, the operator, because it can be closed only by closing valve V ₂ press the left extinguishing button 37 holding the gas burner A _1, with one hand, yet it is possible to perform fire extinguishing one-touch (fire extinguisher E Fire extinguishing function). As a result,
Safety can be achieved, and wasteful consumption of gas can be prevented.

Next, a description will be given of the operation when not in use the gas burner A _1. The gas burner A ₁ of the first embodiment has a configuration in which the on-off valve V ₂ is opened in conjunction with the operation of the ignition piston 15 and the gas guided to the burner pipe 2 is ignited. Therefore, the operator, in advance, the regulating valve V ₁ flow adjustment knob 1
2 by operating to adjust its opening degree, by keeping the optimal length such state of the flame of the combustion gas, leave at immediately before use the opening of the control valve V ₁ in the next use time be able to. As a result, no adjustment is required, and the length of the flame of the combustion gas becomes constant, thereby improving the uniformity of the operation. In addition, since the engagement spring 36 constituting the fire extinguishing device E is engaged with the first stopper portion 34 of the front valve operation piston 31, the ignition lever 16 is prevented from being carelessly operated.

The above operation will be described with reference to FIG.
Ignition piston 15, front valve operating piston 31, and valve element
Explanation related to the amount of movement from each forward end of 26
I do. Each graph in FIG. 11 represents time on the horizontal axis,
On the vertical axis, the ignition piston 15 of the ignition device C, the front valve operating piston
Movement of the ton 31 and the valve body 26 from the respective forward ends.
It represents the quantity. Then, the time t from the start of the operation_TwoFor up to
Region R₁Is a gas burner A₁Shows the action at the time of ignition,
Interval t_TwoFrom time t_FourArea R up to_TwoIs also used
Show action and time t_FourFrom time t₆Area R up to_ThreeIs
Similarly, the operation at the time of extinguishing the fire is shown,₆Subsequent region R
_FourIndicates the same operation when not in use. Ignition lever
16 is pushed, and the front valve is operated in conjunction with the ignition piston 15.
The piston 31 is retracted. Front valve operation piston 3
1 is the distance L₁(See Fig. 7)
The elastic restoring force of the spring 33 and the elastic restoring force of the valve body return spring 28
Becomes equal (time t₁), The valve element 26 retracts and opens.
Valve closing V_TwoIs opened. Further, the ignition piston 15 is set at a distance L
_Two(See FIG. 8), and reaches the retreat end (time t
_Two), The ignition device C operates (region R)₁). This and
And the valve element 26 has already reached the distance L _Three(See Figure 8)
And the on-off valve V_TwoIs open, ensuring ignition of gas
Can be done. After the operation of the ignition device C, the ignition
The pin 15 is returned to the original position.

After reaching the distance L ₂ (maximum stroke), the front valve operating piston 31 which is retracted in conjunction with the ignition piston 15 returns to the valve body return spring 28 and the valve operating spring 33.
To return to the original position by the respective elastic restoring forces. After reaching the distance L ₃ (maximum stroke), the valve element 26 also attempts to return to the original position by the elastic restoring force of the valve element return spring 28. However, the engagement spring 36 constituting the fire extinguishing device E enters the second stopper portion 35 and is engaged and held at the position of the distance L ₄ (see FIG. 10) (time t ₃ ). Therefore, the valve element 26 is also held at the position of the distance L ₅ (see FIG. 10). This is because the rear seat surface 21b of the valve seat 21 and the valve body 2
6 with a gap of a distance L ₅ provided (ie,
State on-off valve V ₂ is opened) is meant to be retained (region R _2).

When the heating operation is completed and the fire extinguishing button 37 of the fire extinguisher E is pressed (time t ₄ ), the valve body 26 and the front valve operating piston 31 move forward and return to the original position. When the valve body 26 is brought into close contact with a side seat surface 21b after the valve seat 21, is closed-off valve V _2, the combustion gas is extinguished (time t _5). Then, the front valve operation piston 31 is returned to the original position (time t ₆ , region R ₃ ). During non-use of the gas burner A _1, the opening degree of the adjusting valve V ₁ was, is held as it is (region R _4).

The gas burner A ₁ of the first embodiment includes a valve 26
The piston for pressing is split into two parts by a separating sheet 17. And, by the isolation sheet 17,
Airtightness between the piston chamber 20 of the valve seat 21 and the cylinder chamber 29a of the cylinder cylinder 29 is maintained. For this reason, an "O-ring" for maintaining the airtightness between the piston chamber 20 and the cylinder chamber 29a is provided on the outer peripheral surface of the front valve operation piston 31 attached to the cylinder chamber 29a of the cylinder cylinder 29.
It is not necessary to attach As a result, the sliding resistance of the front valve operation piston 31 can be reduced while the airtightness of both chambers is maintained, and the front valve operation piston 31 can be smoothly advanced and retracted. That is, it is possible to open the on-off valve V ₂ with a slight force.

In the gas burner A ₁ of the first embodiment, the valve operating piston is divided into two in the longitudinal direction, and a valve operating spring 33 is elastically mounted between the front valve operating piston 31 and the isolation sheet 17. It is a form. By doing so, the valve body 26 can be moved with respect to the stroke of the ignition piston 15.
Can be shortened. Moreover, when the front valve operation piston 31 is returned to the original position, the elastic restoring forces of both the valve element return spring 28 and the valve operation spring 33 can be contributed. However, in the second as in the gas burner A ₂ embodiment, the compression spring front valve operation (valve operation spring 33) was missing form the piston 42, and rear valve operating piston 43 shown in FIGS. 12 and 13 It does not matter. In the gas burner A ₂ of the second embodiment, as in the case of the first embodiment, by using the isolation sheet 17 to hold the airtightness of the cylinder chamber 29a of the piston chamber 20 and the cylinder tube 29 of the valve seat 21 And the front valve operating piston 4
It is not necessary to attach an “O-ring” to the outer peripheral surface of the second. As a result, the front valve operating piston 42 can be easily operated with a small force, as in the case of the first embodiment.
There is an advantage that the configuration of the front valve operation piston 42 is simplified.

Next, a gas burner A3 according to a _third embodiment will be described with reference to FIGS. The gas burner A ₃ of this embodiment includes a front seat surface 44 a of a valve seat 44 constituting an on-off valve V ₂ and a portion (abutting portion 45) of a rear valve operating piston 45 opposed to the front seat surface 44 a.
a) is in the case of close contact. In the case of the present embodiment, the front seat surface 44a and the contact portion 45a are formed of corresponding inclined surfaces. A gas groove 46 for flowing gas is provided in the contact portion 45a of the rear valve operation piston 45. For gas burner A ₃ in this embodiment, in a state where the on-off valve V ₂ is opened, since the contact portion 45a of the front seat 44a and rear valve operating piston 45 of the valve seat 44 is in close contact, after Side valve operation piston 45 and valve seat 44
The gas which has flowed through the gap with the piston insertion hole 44b flows only from the gas groove 46. In this way, by reducing the gas ejection amount, it is possible to reliably ignite the gas cylinder B when the gas cylinder B is at a high pressure.

[0041]

The gas burner according to the present invention opens and closes the gas hole by opening and closing a valve provided in a gas hole provided in the burner body and a valve operating piston in conjunction with the ignition operation of an ignition lever. And a fire extinguisher for keeping the open state of the on-off valve and closing it to extinguish a fire. Thus, the operator can perform both the operation of igniting the gas and the operation of extinguishing the combustion gas with one hand. Further, since the adjustment of the adjusting valve is not required each time the operation is performed, the uniformity of the heating operation can be improved.

When the cylinder chamber accommodating the valve operating piston is divided into two parts by a separating sheet made of a flexible material, the valve operating piston is provided between the valve operating piston and the cylinder chamber. It is not necessary to attach an “O-ring” for airtightness, and the sliding resistance of the valve operation piston can be reduced. As a result, the force required for the ignition operation of the gas burner can be reduced.

Further, when a compression spring is elastically mounted between the first piston splitting member located on the ignition lever side and the separation sheet, the stroke of the valve element constituting the on-off valve can be shortened. The size of the entire gas burner can be made compact.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a gas burner A1 according to a _first embodiment of the present invention.

FIG. 2 is a front view showing the state of use.

3 is a front sectional view of a gas burner A ₁ of the first embodiment.

FIG. 4 is an enlarged sectional view taken along line XX of FIG. 3;

FIG. 5 is a perspective view of the fire extinguisher E.

FIG. 6 is an exploded perspective view of the same.

FIG. 7 is a view showing a state in which the ignition piston 15 is pushed, and the elastic restoring force (F ₁ ) of the valve operating spring 33 is equal to the elastic restoring force (F ₂ ) of the valve body return spring 28.

8 is a view showing a state in which the ignition piston 15 is further pushed, and the front valve operation piston 31 pushes the rear valve operation piston 25. FIG.

FIG. 9 shows a second stopper portion 35 of the front valve operation piston 31.
And the engagement spring 36 is engaged, it is a front cross-sectional view of a gas burner A ₁ in a state where the opening and closing valve V ₂ is opened.

FIG. 10 is an enlarged sectional view taken along line YY of FIG. 9;

FIG. 11 is a graph showing a movement distance of each of the ignition piston 15, the front valve operation piston 31, and the valve body 26 from the forward end with respect to time.

12 is an enlarged sectional view of a gas burner A valve operating device D in _2, and part of the on-off valve V ₂ of the second embodiment.

In [13] the gas burner A ₂ of the second embodiment, an enlarged sectional view showing a state where the on-off valve V ₂ is opened.

14 is a front view of a partially cutaway of the rear valve operating piston 45 in the gas burner A ₃ of the third embodiment.

15 is a view showing a state in which a rear valve operating piston 45 is in close contact with a front seat surface 44a of a valve seat 44. FIG.

FIG. 16 is a sectional view taken along line ZZ of FIG. 15;

FIG. 17 is a front sectional view of a conventional gas burner A ′.

[Explanation of symbols]

A _{1 to} A ₃ : gas burner B: gas cylinder C: ignition device D: valve operating device E: fire extinguishing device V ₁ : regulating valve V ₂ : open / close valve 1: burner main body 2: burner pipe 3: cylinder open / close valve 4: connecting part 7, 8, 9: Gas hole 16: Ignition lever 17: Isolation sheet 20: Piston chamber (valve chamber) 21, 44: Valve seat 25, 43, 45: Rear valve operating piston (Second piston split body) 25a: Piston head (large diameter portion) 26: Valve element 28: Valve element return spring (compression spring) 29a: Cylinder chamber 31, 42: Front valve operation piston (first piston divided body) 33: Valve operation spring (compression spring) 34: first stopper portion (engaged portion) 35: second stopper portion (engaged portion) 36: engagement spring (engagement member) 37: fire extinguishing button (release button) 44a: front seat surface (seat surface) ) 46: Gas groove

Claims (5)

[Claims] 1. A burner body connected to a gas cylinder and provided at a base end thereof for opening the cylinder opening / closing valve, and having a gas hole therein, and a tip end of the burner body. A straight burner tube provided in the burner tube; and a regulating valve provided in the middle of the gas hole of the burner body to guide gas to the burner tube, for adjusting an amount of gas supplied to the burner tube. A gas burner comprising: an ignition device for igniting gas guided to the burner pipe; and an ignition lever for moving the ignition device forward and backward with respect to the burner main body, wherein the connection in the gas hole is provided. An opening / closing valve provided between a portion and the regulating valve; a valve operating device for opening and closing the gas hole by moving a valve operating piston forward and backward in conjunction with an ignition operation of the ignition lever; Open letter It holds the, and further comprising a a fire extinguishing apparatus for extinguishing in closed this gas burner. 2. A cylinder chamber accommodating the valve operating piston is divided into two parts by a separating sheet made of a flexible material, and the valve operating piston is divided into two parts by sandwiching the separating sheet. The gas burner according to claim 1, wherein 3. A compression spring for shortening a stroke of a valve body constituting an on-off valve is provided between the first piston split body located on the ignition lever side and the isolation sheet among the bisected valve operation pistons. 3. The gas burner according to claim 2, wherein the gas burner is mounted. 4. A large-diameter portion is provided at an end on the separation sheet side of the second piston split body on the opening / closing valve side obtained by dividing the piston into two parts, and when the opening / closing valve is opened, the large-diameter portion is provided. The gas supplied to the valve chamber of the on-off valve in close contact with the seat surface on the opposite side to the valve seat of the on-off valve passes through a gas groove formed on the back surface of the large-diameter portion, and flows toward the regulating valve. The gas burner according to claim 2, wherein the gas burner is configured to flow. 5. The fire extinguisher according to claim 1, wherein the plurality of engaged portions provided in a longitudinal direction of the valve operating piston and one of the plurality of engaged portions for preventing the valve operating piston from retreating. 5. The device according to claim 1, further comprising: an engaging member that can be engaged to hold the engaged state by the urging means, and a release button for releasing the engaged state. Gas burner.