JPH0729375Y2 - Thermal processing equipment using liquefied gas - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal processing apparatus which utilizes combustion of liquefied gas such as butane gas, and more particularly to improvement of a control structure of an on-off valve.

[0002]

2. Description of the Related Art Conventionally, as an opening / closing valve of a thermal processing apparatus using a liquefied gas, an opening / closing valve incorporated in, for example, a disposable gas lighter may be used.

This type of open / close valve is opened by sliding a tubular valve body forward against spring pressure to inject gas from the tip of the valve body and to apply force to the valve body. By releasing, the structure is such that it is slid backward by the spring pressure to be closed.

By the way, in order to maintain this type of on-off valve in the open state, it is necessary to press the valve body with a force equal to or greater than the spring pressure and slide it forward, so that it can be easily held. Not.

Therefore, in part, for example, Japanese Patent Publication No. 1-526.
As disclosed in Japanese Patent Publication No. 47, the control member is slid forward to open the open / close valve, and the control member is rotated in the circumferential direction to hold the open / close valve in an open state. Proposed.

[0006]

The above-mentioned conventional control structure for an on-off valve has the advantage that not only the on-off control of the on-off valve but also the control of the flow control valve can be performed by operating the control member. However, there is a problem in that the open / close valve cannot be held in an open state simply by sliding the control member in the front-rear direction, and the control member must be slid in the front-rear direction and then rotated in the circumferential direction.

The present invention has been made in view of the present situation, and the thermal processing using a liquefied gas is extremely easy to operate because the on-off valve can be held in an open state by simply sliding the operating member forward. The purpose is to provide a device.

Another object of the present invention is to operate the operation member so that the piezoelectric ignition means can be operated, and the spring built in the piezoelectric ignition means is effectively used to simplify the structure. It is to provide a thermal processing apparatus using a liquefied gas that can be achieved.

[0009]

The first invention of the present invention is as follows.
As a means for achieving the above object, by sliding a tubular valve body forward against spring pressure, the valve body is opened to inject gas from the tip of the valve body, and the force applied to the valve body is released. And an on-off valve that slides backward by spring pressure to close; a gas from this on-off valve is injected and external air is sucked by its ejector action to generate a mixed gas of gas and air. In a thermal processing apparatus using a liquefied gas, comprising: a gas generating mechanism; and a combustor for burning the mixed gas from the mixed gas generating mechanism,
A guide hole provided in at least the case accommodating the valve body; sliding in the front-rear direction along the guide hole,
An operating member that opens the on-off valve by sliding it forward; and an operating member that is provided on one side of the guide hole in the sliding direction and that has slid forward can hold the operating member at that position. Engagement portion; Engagement spring; Energizing the operating member toward the engaging portion, and locking spring forcibly locking the operating member that has slid forward to the engaging portion; Energizing the operating member rearward in the sliding direction. A return spring and a return spring are respectively provided.

And, in the first invention of the present invention,
Press the operating member against the case against the biasing force of the locking spring,
It is preferable to provide a release mechanism for releasing the engagement with the engagement portion.

In a second aspect of the present invention, as a means for achieving the above object, a tubular valve body is slid forward against spring pressure to open the valve body. An on-off valve that injects gas from the tip and releases the force applied to the valve body to slide and close backward due to spring pressure; and injects gas from this on-off valve to inject external air by its ejector action. In a thermal processing apparatus using a liquefied gas, a mixed gas generation mechanism for sucking the mixed gas to generate a mixed gas of gas and air; and a combustor for burning the mixed gas from the mixed gas generation mechanism;
A guide hole provided in at least the case accommodating the valve body; sliding in the front-rear direction along the guide hole,
An operating member that opens the on-off valve by sliding forward; an engagement with an operating member that protrudes into the slide locus of the operating member by spring pressure from one side in the sliding direction of the guide hole and slides forward. A holding mechanism for holding the operating member at the position; a releasing mechanism for releasing the holding of the operating member by moving the holding mechanism to the outside of the slide track of the operating member against the spring pressure; and the operating member backward in the sliding direction. And a return spring for urging; respectively.

In the present invention, a piezoelectric ignition means that operates by sliding the operation member is provided in front of the operation member, and the spring built in the piezoelectric ignition means is used as a return spring. Preferably.

[0013]

In the thermal processing apparatus using the liquefied gas according to the first aspect of the present invention, the valve member slides forward by opening the opening / closing valve by sliding the operating member forward along the guide hole. Open.

By the way, when the operating member is slid forward, the operating member is forcibly locked to the engaging portion by the urging force of the locking spring and held at the front end side of the guide hole. Therefore, the on-off valve is held in the open state.

By pressing the operating member against the biasing force of the locking spring to the other side in the sliding direction of the guide hole, the engagement with the engaging portion is released, and the biasing force of the return spring causes the guide hole to move. It returns to the rear end and the on-off valve closes.

In the first aspect of the present invention, the case is provided with a releasing mechanism for pressing the operating member against the urging force of the locking spring to release the engagement with the engaging portion. ,
By operating this release mechanism, the on-off valve can be closed.

In the thermal processing apparatus using liquefied gas according to the second aspect of the present invention, the valve member slides forward and opens and closes by sliding the operating member forward along the guide hole. The valve opens.

By the way, when the operating member is slid forward, the holding mechanism engages with the operating member, and the operating member is held at the front end side of the guide hole. Therefore, the on-off valve is held in the open state.

When the release mechanism is operated, the holding of the operating member by the holding mechanism is released, and the urging force of the return spring returns the operating member to the rear end of the guide hole and closes the on-off valve.

In the present invention, a piezoelectric ignition means that operates by sliding the operation member is provided at the front position of the operation member, and a spring built in the piezoelectric ignition means is used as a return spring, whereby the operation member is It is possible to perform ignition at the same time by the operation of, and it is possible to simplify the structure by sharing the parts.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows a thermal processing apparatus using a liquefied gas according to a first embodiment of the present invention. In the figure, reference numeral 1 is a cylindrical case connected to a gas tank 2 and this case is shown in FIG. A flow rate control valve 3 and an opening / closing valve 4 for controlling the flow rate of the liquefied gas from the gas tank 2 are provided in the space 1, and the flow rate control valve 3 swings the operation lever 5 in the circumferential direction. It is controlled.

Further, as shown in FIG. 1, the on-off valve 4 is opened by sliding a tubular valve body 6 having a bulged tip forward against the spring pressure, and the tip of the valve body 6 is opened. By injecting gas from the valve and releasing the force applied to the valve element 6, the valve body 6 is slid backward by the spring pressure to be closed. And the tip of this on-off valve 4 is
The nozzle member 7 fixed in the case 1 is slidably inserted, and the space between the nozzle member 7 and the nozzle member 7 is not shown.
Sealed with a ring or the like.

As shown in FIG. 1, a mixed gas generating member 8 is continuously provided on the tip side of the nozzle member 7, and the mixed gas generating member 8 collects the gas from the valve body 6 into the nozzle member. By injecting from 7, the outside air is sucked from the outside air intake hole 9 by its ejector action, and a mixed gas of gas and air is generated. Then, the generated mixed gas is guided to the tip 11 via the guide tube 10.

As shown in FIG. 1, for example, a net-shaped diffusing member 12 is incorporated in the inside of the guide tube 10 near the tip thereof, and a (+) of a piezoelectric ignition device 13 described later is provided on the tip side thereof. Spark plug 1 connected to the side via lead wire 14
5 is assembled, and further, the combustion chamber 16 is integrally provided at the tip of the guide cylinder 10 by expanding the diameter of the guide cylinder 10.

As shown in FIG. 1, the peripheral surface of the combustion chamber 16 is provided with an opening 17 for flammable combustion of the mixed gas. The opening 17 is provided on the outer peripheral portion of the combustion chamber 16. It can be closed by a cylindrical shutter member 18 that is slidable in the direction. Then, by closing the opening 17 with the shutter member 18, the flame of the flammable combustion can be extinguished.

On the other hand, as shown in FIG. 1, the tip 11 is formed in a cylindrical shape with a closed tip having an exhaust port 19 on the peripheral surface of the tip. A combustion catalyst 20 for flameless combustion of gas is incorporated.

As shown in FIG. 1, the piezoelectric ignition device 13 is fixed in the case 1, and at its rear end,
An ignition member 22 is provided so as to protrude by being pushed into the piezoelectric ignition device 13 against the biasing force of the built-in spring 21. The ignition member 22 is driven by an operation member 23 for opening and closing the open / close valve 4.

As shown in FIGS. 1 to 4, the operating member 23 slides in the front-rear direction in the operating portion 24 located outside the case 1 and in the guide hole 25 provided in the case 1. A slide part 26, a drive part 27 for driving the ignition member 22, and an interlock part 28 having a U-shaped notch 29.
The valve body 6 is inserted into the notch 29 as shown in FIGS. 1 and 4. Then, by sliding the operating member 23 forward,
The interlocking portion 28 comes into contact with a retaining ring 30 fixed to the outer peripheral portion of the tip of the valve body 6 to push the valve body 6 forward, whereby the open / close valve 4 is opened.

As shown in FIG. 1, a connecting piece 31 connected to the negative (-) side of the piezoelectric ignition device 13 via the ignition member 22 is attached to the front end faces of the drive unit 27 and the interlocking unit 28. The stop ring 3 is provided on the outer peripheral portion of the tip of the valve body 6.
A spring 32 that connects 0 and the nozzle member 7 is circumferentially provided. Therefore, on the (−) side of the piezoelectric ignition device 13, when the connecting piece 31 contacts the retaining ring 30, the ignition member 22, the connecting piece 31, the retaining ring 30, the spring 32, the nozzle member 7, the mixed gas generating member. 8 and the guide cylinder 10 are connected to the diffusing member 12, and sparks are generated between the spark plug 15 and the diffusing member 12.

The guide hole 25, as shown in FIG.
It has a rectangular shape extending in the front-rear direction, and a slide portion 26 having a rectangular cross-section slides in the front-rear direction inside the guide hole 25.

As shown in FIG. 5, on one side of the guide hole 25 on the front end side in the sliding direction, a concave engagement concave portion 33 is provided by cutting out the side surface of the guide hole 25, and the piezoelectric ignition device 13 is provided. Resisting the biasing force of the built-in spring 21,
By sliding the operating member 23 forward and fitting and locking the slide portion 26 in the engaging recess 33, the operating member 23 can be temporarily fixed at that position. As a result, the on-off valve 4 is held in the open state.

Inside the case 1 on the side opposite to the engaging recess 33, as shown in FIGS. 4 and 6, one side surface of the drive unit 27 is constantly pressed toward the engaging recess 33. A stop spring 34 is provided, and the sliding portion 26 is forcibly fitted and locked in the engaging recess 33 by only sliding the operating member 23 forward by the biasing force of the locking spring 34. ing.

The drive portion 27 facing the locking spring 34
As shown in FIG. 6, a step portion 35 into which the locking spring 34 is dropped when the operating member 23 is slid to the rear end is provided at the front end portion of the side surface. Positioning of the slide end point to the rear end side of the operating member 23 is ensured.

Inside the engagement recess 33 side of the case 1, as shown in FIGS. 4 and 6, the step portion 3 of the drive unit 27 is provided.
The engagement release button 36 facing the side opposite to the side having 5
Is provided, and by pushing this engagement release button 36 into the case 1 against the urging force of the spring 37,
The drive portion 27 is pressed against the urging force of the locking spring 34, and the slide portion 26 fitted and locked in the engaging recess 33 is pushed out into the guide hole 25 to be engaged with the engaging recess 33. To be released, and then the operating member 2
3 is a spring 2 built in the piezoelectric ignition device 13.
The urging force of 1 returns to the position shown in FIG. That is, in this embodiment, the spring 21 of the piezoelectric ignition device 13 functions as a return spring of the operating member 23, and the operating member 23 slides to the rear end, so that the on-off valve 4 is opened. It is designed to automatically return to the closed state.

Next, the operation of this embodiment will be described.
After setting the flow rate of the liquefied gas by the flow rate control valve 3, when the operating portion 24 of the operating member 23 is pushed forward, the operating member 2
3 slides forward along the guide hole 25,
The connection piece 31 arranged on the front surface side of 8 contacts the retaining ring 30. Thereby, as described above, the (−) side of the piezoelectric ignition device 13 and the diffusion member 12 are electrically connected.

When the operating member 23 is slid further forward, the retaining ring 30 is pushed forward by the interlocking portion 28, the valve body 6 slides forward, and the on-off valve 4 opens.
Then, the liquefied gas in the gas tank 2 is supplied to the nozzle member 7 from the tip of the valve body 6 and injected from the nozzle member 7 into the mixed gas generating member 8.

By the ejector action accompanying the injection of the liquefied gas, the outside air is sucked into the mixed gas generating member 8 from the outside air intake hole 9, and the mixed gas of the gas and the air is generated in the mixed gas generating member 8. Is generated. This mixed gas is supplied to the combustion chamber 16 through the inside of the guide cylinder 10.

When the operating member 23 is slid further forward, the piezoelectric ignition device 13 is driven and the ignition plug 15
A spark is generated between the diffusion member 12 and the diffusion member 12, and the mixed gas burns in the combustion chamber 16 with flame. The combustion catalyst 20 is heated to the oxidation reaction temperature by this flame.

When the combustion catalyst 20 has risen to the oxidation reaction temperature, the shutter member 18 is slid forward,
The opening of the combustion chamber 16 is closed. Then, the flame is extinguished, and the mixed gas is directly supplied to the combustion catalyst 20.
Flameless combustion due to.

On the other hand, when the operating member 23 is slid to the front end of the guide hole 25, the sliding portion 26 is forced into the engaging concave portion 33 by the urging force of the locking spring 34, as shown by the chain line in FIG. Is locked in place. Therefore, even if the pressing force on the operating portion 24 is released, the operating member 23 is temporarily fixed at that position, and the on-off valve 4 is held in the open state.

When the on-off valve 4 is closed and the use is stopped, the engagement release button 36 shown in FIG. 6 is pushed into the case 1. Then, the drive portion 27 is pressed against the biasing force of the locking spring 34, the slide portion 26 is pressed toward the guide hole 25 side, and the engagement with the engagement recess 33 is released.

Since the operating member 23 is constantly pressed and urged rearward by the urging force of the spring 21 built in the piezoelectric ignition device 13, the engagement with the engagement recess 33 releases the guide hole 25. Slide to the rear edge.

By this slide, the pressing force applied to the retaining ring 30 by the interlocking portion 28 is also released, so that the valve body 6 slides backward and the on-off valve 4 closes.

By simply sliding the operating member 23 forward, the sliding portion 26 automatically engages with the engaging recess 33.
The on-off valve 4 is maintained in the open state. Therefore, the operation is extremely easy.

When the opening / closing valve 4 is opened, the ignition operation is also performed at the same time, so that the work is easier and the spring 21 of the piezoelectric ignition device 13 can be used as the return spring of the operating member 23. The number of parts can be reduced to simplify the structure and reduce the cost.

Further, since the engagement with the engagement concave portion 33 can be released only by pushing the engagement release button 36, the work of closing the on-off valve 4 is extremely easy.

FIG. 7 shows a second embodiment of the present invention, in which an engaging projection 43 is used instead of the engaging recess 33 in the first embodiment. In other respects, the structure is the same as that of the first embodiment and the operation is the same.

Therefore, even if the engaging projection 43 is used, the same effect as that of the first embodiment can be expected.

In both of the above embodiments, the case where the engagement with the engagement concave portion 33 or the engagement projection 43 is released using the engagement release button 36 has been described, but the operation portion 24 of the operation member 23 is described. The engaging recess 33 or the engaging protrusion 4
The engagement can be released by directly pressing the side opposite to 3 with a finger. Therefore, the engagement release button 36 may be omitted if necessary.

FIG. 8 shows a third embodiment of the present invention. The engaging recess 33 and the engaging projection 43 in each of the above embodiments.
The holding member 50 is used instead of the engagement release button 36.

That is, as shown in FIG. 8, the tip of the holding member 50 is projected into the slide locus of the slide portion 26 by the urging force of the spring 51, and guides the slide portion 26. By sliding to the front end of the hole 25, the rear end of the slide portion 26 is engaged, and the slide portion 26 can be temporarily fixed at that position. The temporary fixing can be released by pulling the holding member 50 to the outside of the case 1 against the biasing force of the spring 51. The other points are the same as those of the first embodiment, and the operation is the same.

By using the holding member 50, however, the operation member 23 only slides in the front-back direction along the guide hole 25, and does not slide in the lateral direction of the guide hole 25, so that the operation is stable. Can be made.

In the third embodiment, for convenience of explanation, the case where the holding member 50 is engaged with the rear end of the slide portion 26 has been illustrated and described. The operation unit 24, the drive unit 27, or the interlocking unit 28 may be used, and the recesses are not limited to being engaged with the rear ends of these, and a recess may be provided in the intermediate portion to engage with this recess. . Instead of directly pulling the holding member 50, the holding member 50 may be pressed from the side opposite to the holding member 50 of the case 1 to release the engagement.

In each of the above embodiments, the case where the spring 21 of the piezoelectric ignition device 13 is used as the return spring of the operating member 23 has been described, but in the case of manual ignition, the spring is placed at the position of the piezoelectric ignition device 13. Put on,
This spring may be used as a return spring. And by doing in this way, it can be applied also to the thermal processing device of manual ignition.

[0055]

As described above, according to the first aspect of the present invention, the on-off valve can be opened by sliding the operating member forward along the guide hole, and at the same time, it can be slid forward. The operating member is forcibly locked to the engaging portion by the urging force of the locking spring and held at that position, so it is not necessary to constantly press the operating member to keep the on-off valve open. Easy to operate.

When the engagement with the engagement portion is released, the operating member automatically returns to the rear end of the guide hole by the urging force of the return spring, so that the on-off valve can be easily closed.

In the first aspect of the present invention, since the engagement of the operating member with the engaging portion can be released by the releasing mechanism, the releasing operation is easy and the operation is reliable.

In the second aspect of the present invention, the holding mechanism is engaged with the operating member by sliding the operating member forward along the guide hole, and the operating member is held at this position. The on-off valve can be held in the open state.
Then, by operating the release mechanism, the holding of the operating member by the holding mechanism is released, and the operating member can be returned to the rear end of the guide hole by the urging force of the return spring.

In the present invention, the spring incorporated in the piezoelectric ignition means is used as the return spring, so that the opening / closing valve can be opened by the operating member and the ignition can be performed at the same time. Also, the structure can be simplified by also using.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a thermal processing apparatus using a liquefied gas according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing an appearance of an operation member of FIG.

FIG. 3 is a right side view of FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 1 showing the relationship between the operating member, the locking spring, and the engagement release button.

5 is a view corresponding to a cross section taken along line VV of FIG. 4, showing a relationship between the guide hole, the engaging recess, and the slide portion.

6 is a view corresponding to a cross section taken along line VI-VI of FIG. 4 showing a relationship between a locking spring, an engagement release button, and a drive unit.

FIG. 7 is a view corresponding to FIG. 5, showing a second embodiment of the present invention.

FIG. 8 is a view corresponding to FIG. 5, showing a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 case 2 gas tank 4 on-off valve 6 valve body 7 nozzle member 8 mixed gas generating member 9 outside air intake hole 10 guide cylinder 11 tip 13 piezoelectric ignition device 15 ignition plug 16 combustion chamber 17 opening 18 shutter member 20 combustion catalyst 21, 37, 51 Spring 22 Ignition member 23 Operation member 24 Operation part 25 Guide hole 26 Sliding part 27 Drive part 28 Interlocking part 30 Stop ring 33 Engagement recess 34 Engagement spring 36 Engagement release button 43 Engagement protrusion 50 Holding member

Claims (4)

[Scope of utility model registration request] 1. A tubular valve body is slid forward against a spring pressure to open so as to inject gas from the tip of the valve body and to release the force applied to the valve body. An opening / closing valve that slides backward by spring pressure to close; a mixed gas generation mechanism that injects gas from the opening / closing valve and sucks external air by its ejector action to generate a mixed gas of gas and air A guide hole provided in at least a case accommodating the valve body in a thermal processing apparatus using a liquefied gas, which comprises: a combustor for combusting the mixed gas from the mixed gas generating mechanism; An operating member that slides in the front-rear direction along the guide hole and opens the on-off valve by sliding forward; engagement with an operating member that is provided on one side of the guide hole in the sliding direction and has slid forward To An engaging portion capable of holding the operating member at the position; and a locking spring for biasing the operating member toward the engaging portion and forcibly locking the operating member that has slid forward to the engaging portion. A thermal processing device using a liquefied gas; and a return spring for urging the operating member backward in the sliding direction. 2. The case is provided with a release mechanism for pressing the operating portion against the biasing force of the locking spring to release the engagement with the engaging portion. A thermal processing apparatus using the liquefied gas according to 1. 3. A tubular valve body is slid forward against a spring pressure to open so as to inject gas from the tip of the valve body and release the force applied to the valve body. An on-off valve that slides backward due to spring pressure to be closed; a mixed gas generation mechanism that injects gas from the on-off valve and sucks external air by its ejector action to generate a mixed gas with the gas; In a thermal processing apparatus using a liquefied gas, which comprises: a combustor for combusting the mixed gas from the mixed gas generating mechanism; and a guide hole provided in at least the case accommodating the valve body; An operating member that slides in the front-back direction along with, and opens the on-off valve by sliding forward; from one side in the sliding direction of the guide hole, projects into the slide locus of the operating member by spring pressure, and moves forward. A holding mechanism that holds the operating member at the position by engagement with the sliding operating member; a release mechanism that releases the holding of the operating member by moving this holding mechanism to the outside of the slide track of the operating member against the spring pressure. A heat processing apparatus using liquefied gas, comprising: a mechanism; and a return spring that biases the operating member rearward in the sliding direction. 4. A piezoelectric ignition means which is operated by sliding the operation member is provided at a front position of the operation member, and a spring incorporated in the piezoelectric ignition means is used as a return spring. Item 1, 2 or 3
A thermal processing apparatus using the liquefied gas described.