JP7013596B1 - Gas cylinder opening / closing mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To open and close a gas cylinder filled with at least a partially liquefied gas, and even when the posture of the gas cylinder is freely changed, the gas inside the gas cylinder is efficiently vaporized to the outside. An object of the present invention is to provide an opening / closing mechanism for a gas cylinder that can be discharged into a gas cylinder. SOLUTION: A housing in which at least a part of a flow path for discharging a gas filled inside a gas cylinder to the outside is formed, and a housing supported by the housing and operated so that the flow path is opened and closed. A working body and a closing member that closes the flow path and separates the flow path from the space filled with gas in the gas cylinder are provided, and the gas invaded by the closing member is vaporized and introduced into the flow path. As such, the closure member is composed of a material that impregnates the gas in a liquid state. [Selection diagram] Fig. 2

Description

The present invention relates to an opening / closing mechanism of a gas cylinder filled with at least a partially liquefied gas.

A housing in which at least a part of a flow path for discharging the gas filled inside the gas cylinder to the outside is formed, and a stem (actuating body) supported by the housing and capable of operating so that the flow path is opened and closed. ), And a gas cylinder opening / closing mechanism in which the flow path is opened / closed by the stem reciprocating in the axial direction has been conventionally known.

By the way, since the inside of the gas cylinder is held in a high pressure state, the gas exists in a liquid state. This liquid gas is vaporized by the decrease in ambient pressure in the process of being discharged to the outside through the flow path, but if it is not sufficiently vaporized and is discharged to the outside in a liquid state, it should be. It may not be possible to achieve the purpose of.

For example, in a portable gas cylinder filled with combustion gas used for a cassette stove or the like, in a liquid state, sufficient combustion is not performed, a red flame is generated, and carbon monoxide is generated. Further, when it is used as an air ductor, it is not possible to remove dust and the like in the liquid state, and there is a problem that the original purpose cannot be generated.

In order to prevent these problems, a gas cylinder opening / closing mechanism in which an introduction pipe is piped from a housing to a portion where gas is vaporized inside the gas cylinder has been developed and is known (for example, Patent Document 1). See.).

According to Patent Document 1, since the vaporized gas can be introduced into the housing from the introduction pipe, it is possible to efficiently prevent the gas from being discharged to the outside of the gas cylinder in the liquid state.

However, on the other hand, since it is necessary to stably hold the portion of the gas cylinder in which the gas is vaporized at a fixed position, the posture of the gas cylinder is maintained while the gas is discharged from the gas cylinder. It needs to be kept constant. For example, in the type used for a portable cassette stove, the gas cylinder is laid sideways so that the end opposite to the housing of the introduction pipe faces upward, and the position in the axial direction thereof is predetermined. It is necessary to keep it in the same document (see FIG. 8 of the same document).

That is, it is necessary to hold the gas cylinder in a predetermined posture, which is not easy to use.

On the other hand, in order to promote the vaporization of gas, a means for stuffing a cloth or cotton capable of impregnating a liquid gas and promoting the vaporization of the gas with the cloth or cotton is also known. Since the amount of gas to be vaporized changes according to the surface area of cloth or cotton, it is necessary to overcrowd the cloth or cotton in the gas cylinder in order to secure a certain amount of gas in the vaporized state. There is a problem that it has to be done manually, the labor is increased, and the manufacturing cost is high.

Japanese Unexamined Patent Publication No. 11-101400

The present invention is a mechanism for opening and closing a gas cylinder filled with at least a partially liquefied gas, and even when the posture of the gas cylinder is freely changed, the gas inside the gas cylinder is efficiently vaporized. An object of the present invention is to provide an opening / closing mechanism for a gas cylinder that can be discharged to the outside and that requires less labor for manufacturing.

In order to solve the above problems, a gas cylinder opening / closing mechanism filled with at least a partially liquefied gas, and at least a part of a flow path for discharging the gas filled inside the gas cylinder to the outside is formed. The housing was filled with a housing, a working body supported by the housing and capable of operating the flow path so as to be opened and closed, and the flow path closed and filled with gas in the flow path and the gas cylinder. The closing member may impregnate the gas in a liquid state so as to include a closing member that separates the space from the closing member so that the gas impregnated in the closing member is vaporized and introduced into the flow path. Composed of a possible material, the actuating body is a stem formed in its actuating direction, at least a portion of the stem being formed in a hollow shape, within which a space extending in its own axial direction is formed. One end side of the space inside the stem in the axial direction is opened toward the outside, and an insertion member extending in the axial direction is inserted into the inner peripheral surface side of the space inside the stem in a fitted state. The gap formed between the outer peripheral surface of the insertion member and the inner peripheral surface of the space is characterized in that it constitutes a part of the flow path.

The stem is provided with a ring-shaped opening / closing member mounted on the outer peripheral side of the stem, and the stem is provided with a communication hole for communicating the outer peripheral side thereof and the space inside the stem. The communication hole is closed and attached to the stem, and the stem is closed by the opening / closing member by elastically deforming the opening / closing member and operating the stem on one side in the axial direction thereof. The structure may be such that the communication hole that has been formed is opened.

A housing in which at least a part of a flow path for discharging the gas filled inside the gas cylinder to the outside, which is an opening / closing mechanism of a gas cylinder filled with liquefied gas, and the housing are formed. A working body that is supported by the gas cylinder and can be operated so that the flow path is opened and closed, and a closing member that closes the flow path and separates the flow path from the space filled with gas in the gas cylinder. The closed member is made of a material capable of impregnating the gas in a liquid state so that the gas impregnated in the closed member is introduced into the flow path while being vaporized. The housing has a tubular portion located in the gas cylinder, a part of the flow path is formed on the inner peripheral surface side of the tubular portion, and the closing member is exteriorized by the tubular portion. It may be formed in a bottomed tubular shape so as to block the flow path, and the tubular portion may be integrally formed with the housing.

A housing in which at least a part of a flow path for discharging the gas filled inside the gas cylinder to the outside, which is an opening / closing mechanism of a gas cylinder filled with liquefied gas, and the housing are formed. A working body that is supported by the gas cylinder and can be operated so that the flow path is opened and closed, and a closing member that closes the flow path and separates the flow path from the space filled with gas in the gas cylinder. The closed member is made of a material capable of impregnating the gas in a liquid state so that the gas impregnated in the closed member is introduced into the flow path while being vaporized. The housing has a tubular portion located in the gas cylinder, a part of the flow path is formed on the inner peripheral surface side of the tubular portion, and the closing member is exteriorized by the tubular portion. It is formed in a bottomed tubular shape so as to block the flow path, and the inside of the tubular shape of the closing member is filled with a filler capable of impregnating a liquid gas, and the tubular shape of the closing member is filled. The liquid gas that was not vaporized in the process from the outer peripheral surface to the inner peripheral surface of the gas is impregnated into the filler, and a plurality of the fillers are filled inside the tubular shape of the closing member of the gas. It may be a gas cylinder.

The filler may be a felt material.

The plurality of the fillers may be arranged in the flow direction of the gas.

Even if the posture of the gas cylinder is freely changed by the closing member made of a material that impregnates the gas in a liquid state, the gas inside the gas cylinder can be efficiently vaporized and discharged to the outside. At the same time, the labor of providing the closing member is simpler than the work of filling the gas cylinder with the filler, and the labor of manufacturing is also reduced.

It is a perspective view which shows the structure of the portable gas cylinder to which this invention is applied. It is sectional drawing of the main part which shows the internal structure of the gas cylinder of FIG. It is an exploded view of the occlusion mechanism. It is sectional drawing of the opening and closing mechanism in the closed-operated state. It is sectional drawing of the opening and closing mechanism in the state which was opened operation. It is sectional drawing of the main part which shows the internal structure of the gas cylinder which concerns on another Embodiment of this invention. (A) is a drawing showing the shape when the insertion member is viewed from the axial direction, and (B) is a drawing showing the shape when the insertion member is viewed from the direction perpendicular to the axial direction. It is sectional drawing of the main part which shows the internal structure of the gas cylinder which concerns on other embodiment of this invention. It is an enlarged view of FIG. It is an enlarged view of the state in which the torch type gas burner is removed from the opening / closing mechanism shown in FIG.

FIG. 1 is a perspective view showing the configuration of a portable gas cylinder to which the present invention is applied, and FIG. 2 is a cross-sectional view of a main part showing the internal structure of the gas cylinder of FIG. The illustrated portable gas cylinder includes a metal container body 1 formed into a bottomed cylindrical shape, and a metal canopy 2 that closes an open portion of the container body 1 opposite to the bottom. ..

The canopy 2 is formed in a dome shape that rises outside the container body 1 with the axis of the container body 1 as the center, and the circular peripheral edge portion 2a located at the end opposite to the apex portion thereof is the container body 1. It is fixed by caulking on the peripheral edge on the open part side of. An opening is formed at the apex portion of the canopy 2. In other words, a circular opening edge 2b is formed at the apex-side end of the top plate 2.

Incidentally, the opening edge portion 2b functions as a locking portion that locks and supports the opening / closing mechanism 3 that opens / closes the flow path R that discharges the gas inside the gas cylinder (container body 1) to the outside. The total length of the locking portion 2b has a circular ring shape as described above, and the cross section thereof is formed to be curved in an arc shape on the radial outer side of the circular ring shape.

Next, the configuration of the closing mechanism 3 will be described in detail with reference to FIGS. 2 to 4.

FIG. 3 is an exploded view of the closing mechanism, and FIG. 4 is a cross-sectional view of the opening / closing mechanism in a closed state. The opening / closing mechanism 3 fits into the mountain cup 4 and a metal mountain cup 4 that is caulked and fixed to the canopy 2 so as to close at least a part (most of the openings in the illustrated example) of the canopy 2. A closing cap (closing member) that closes the flow path R and closes the space 1a filled with gas inside the container body 1 (gas cylinder) and the flow path R. ) 7 and.

The mountain cup 4 is formed from a bottomed cylindrical main body 8 inserted into the inside of the canopy 2 through an opening, and a circular peripheral edge located on the end side opposite to the bottom 8a of the main body 8. A flange portion 9 integrally extending radially outward, and a cylindrical accommodating portion 11 formed so as to project vertically or substantially vertically to the open side of the main body portion 8 from a portion near the center of the bottom portion 8a of the main body portion 8. Is integrally possessed.

The bottom portion 8a of the main body 8 is located inside the canopy 2, while the flange portion 9 is located outside the canopy 2.

On the side of the flange portion 9 near the outer peripheral surface of the main body 8, a fitting groove 9a is recessed over the entire circumference thereof. The mountain cup 4 is fixed to the canopy 2 by fitting and inserting the above-mentioned circular ring-shaped locking portion 2b into the circular ring-shaped fitting groove 9a. At this time, one or both of the canopy 2 and the mountain cup 4 (in this example, the mountain cup 4) are plastically deformed to fix each other (caulking).

Further, the flange portion 9 has a notch-shaped portion 9b formed in a part thereof in the circumferential direction, whereby the position of the flange portion 9 can be determined in the axial direction of the gas cylinder. The mark of the notch-shaped portion 9b has been very important in the past, but its importance is greatly reduced by the configuration described later.

The accommodating portion 11 forms the same axis together with the main body 8, the container main body 1 and the canopy 2, and on the inner peripheral surface side thereof, a part or all of the outer peripheral surface of the housing 6 formed into a bottomed cylindrical shape ( In this example, a part) is inserted and fixed in the fitted state. The end portion of the accommodating portion 11 on the side protruding from the bottom portion 8a is partially closed to form the ceiling portion 10. In the central portion of the ceiling portion 10, an insertion hole 10a through which a stem 12 made of a rigid synthetic resin formed in a straight line on the axis of the accommodating portion 11 is movably inserted in the axial direction thereof is bored. ing.

The housing 6 is arranged so as to have the same axis as the accommodating portion 11, and a space 6a into which the gas filled in the gas cylinder (container body 1) is introduced is formed inside the housing 6. The outer peripheral diameter of the portion closer to the ceiling portion 10 and the intermediate portion (fitting portion 13) in the housing 6 is larger than the outer peripheral diameter of the other portion far from the ceiling portion 10 (exposed portion 14).

By fitting and inserting the outer peripheral surface of the fitting portion 13 into the inner peripheral surface of the accommodating portion 11, a part of the housing 6 is accommodated in the accommodating portion 11 and fixed to the mountain cup 4 side. At this time, one or both of the accommodating portion 11 and the housing 6 (in this example, the accommodating portion 11) are plastically changed to fix (caulking) the two.

The diameter of the space 6a inside the housing 6 is gradually reduced from the fitting portion 13 toward the exposed portion 14. Specifically, the space 6a is set so that the diameter of the portion closer to the fitting portion 13 is smaller than the diameter of the portion closer to the exposed portion 14. Further, an introduction hole 6b extending on the axis thereof is formed in the bottom of the housing 6. The diameter of the introduction hole 6b is further smaller than the minimum diameter of the space 6a. Then, the gas inside the gas cylinder (container body 1) is introduced into the space 6a from the introduction hole 6b.

In the stem 12, the protruding portion 16 protruding outward from the insertion hole 10a and the insertion portion 17 inserted into the space 6a inside the housing 6 are arranged in a straight line in the axial direction thereof, and the insertion portion 17 and the insertion portion 17 are arranged. The protruding portion 16 is integrally connected to the protruding portion 16 by a locking portion 18 having a smaller outer peripheral diameter than both. Incidentally, the diameter of the space 6a of the housing 6 is formed to be larger than the diameter of the outer periphery of the insertion portion 17 of the stem 12, and the stem 12 is in a state of being movable in the axial direction, and the insertion portion 17 is the space of the housing 6. It is inserted in 6a.

At least a part of the stem 12 (specifically, the protruding portion 16 and the locking portion 18) is formed in a hollow shape, and a space 12a extending linearly along the axis of the stem 12 is formed therein. Has been done. The space 12a has an open end on one end side (specifically, the protrusion 16 side) in the axial direction. A communication hole 12b extending in the radial direction of the stem 12 is formed in the locking portion 18, whereby a portion closer to the locking portion 18 in the space 12a and a space on the outer peripheral surface side of the locking portion 18 communicate with each other. ing.

Further, a circular ring-shaped gasket (opening / closing member) 19 is usually attached and fixed to the outer periphery of the locking portion 18. The gasket 18 is made of a synthetic resin material and is configured to be elastically deformable. According to this configuration, the communication hole 12b is normally elastically closed to the gasket 19 by the inner peripheral surface.

Further, the insertion portion 17 is formed so that the outer peripheral diameter of the tip portion 17a, which is the end portion on the far side of the locking portion 18, is smaller than the outer peripheral diameter of the intermediate portion 17b, which is the other portion, and the step portion is formed at the boundary thereof. 17c is formed.

A compression spring (elastic member) 21 is interposed between the step portion 17c and the bottom surface of the space 6a of the housing 6. The tip portion 17a of the compression spring 21 is inserted into at least a part of the space on the inner peripheral surface side thereof, while the outer peripheral surface side thereof is positioned close to or in contact with the inner peripheral surface of the space 6a of the housing 6. To. The compression spring 21 elastically urges the gasket 18 mounted on the stem 12 toward the ceiling portion 10. By this urging, the gasket 18 and the ceiling portion 10 are in close contact with each other, and airtightness is ensured.

Briefly explaining the procedure for assembling the housing 6 to the mountain cup 4, first, the gasket 18 is attached to the locking portion 18 of the stem 12, and then the stem 12 and the compression spring 21 are identical to the space 6a of the housing 6. Insert it so that it is at the axis. Subsequently, in this state, the assembling work is completed by fitting the outer peripheral surface of the fitting portion 13 of the housing 6 into the inner peripheral surface of the accommodating portion 11 and inserting and fixing the fitting portion 11.

Next, opening and closing of the flow path R will be described using the opening / closing mechanism 3 based on FIGS. 4 and 5.

FIG. 5 is a cross-sectional view of the opening / closing mechanism in the opened state. When the stem 12 is operated (pushing operation) to one side in the axial direction so that the stem 12 is pushed into the gas cylinder (container body 1) against the elastic force of the compression spring 21, the gasket 19 is removed from the outside. It is elastically curved and deformed toward the housing 6 side from the peripheral edge toward the center side, and the communication hole 12b blocked by the gasket 19 is opened.

By this opening, the gas that has flowed into the space 6a from the inside of the gas cylinder (container) via the introduction hole 6b can flow into the space 12a through the communication hole 12b. That is, in this example, the flow path R is composed of an introduction hole 6b, a space 6a, a communication hole 12b, and a space 12a.

On the other hand, when the pushing operation force of the stem 12 is released, the stem 12 is pushed back to the outside by the elastic force of the compression spring 21, the elastically deformed gasket 18 is restored to the original shape, and the communication hole 12b is closed again. Will be done.

In this way, the opening / closing mechanism 3 opens / closes the flow path R by opening / closing the communication hole 12b with the gasket 18. That is, the stem 12 functions as an operating body that operates so that the flow path R is opened and closed. Incidentally, since the communication hole 12b is formed to have a smaller diameter than the portion of the flow path R other than the insertion hole 12b, it functions as an orifice, accelerates the flow velocity of the gas, and promotes the gas.

However, even with this, the vaporization of the gas may be insufficient. In order to efficiently prevent such a situation, the above-mentioned blocking cap 7 is provided. By the way, it is not essential to completely vaporize the liquefied gas, and it is sufficient if it is vaporized at an appropriate ratio necessary for combustion.

Next, the configuration of the block cap 7 will be described in detail with reference to FIGS. 3 to 5.

The block cap 7 is made of a material that is formed into a bottomed cylindrical shape, is capable of impregnating a gas in a liquid state, and is breathable to the gas in a gaseous state. As long as it is a material having such a function, there are no other requirements, but in this example, the closing cap 7 is formed by compression-molding a metal powder such as brass into a bottomed cylindrical shape and firing it. Manufacture. In other words, the closing cap 7 is made of a fired metal material.

The closing cap 7 is inserted by inserting the outer peripheral surface of the exposed portion 14 exposed on the inner side of the gas cylinder (container body 1) in the housing 6 into the inner peripheral surface side of the opening side of the closing cap 7 in a fitted state. It is attached to the housing 6 and fixed. That is, the exposed portion 14 that constitutes a part of the housing 6 and has a part of the flow path R formed inside thereof functions as a tubular portion that outers the cylindrical closing cap 7. In this state, a space S is formed between the bottom surface of the closing cap 7 and the end surface on which the introduction hole 6b of the housing 6 is formed.

The space S is filled with a plurality of fillers 22 that are formed into a disk shape and can be elastically deformed. The filler 22 is made of a material (felt material in this example) that can be impregnated with the gas in a liquid state and has air permeability to the gas in a gaseous state.

The plurality of fillers 22 are elastically slightly reduced and deformed in the flow direction of the gas flowing in the flow path R (specifically, the axial direction of the closing cap 7, the housing 6, and the stem 12). The space S is filled in a state of being arranged side by side.

According to the closing cap 7 and the plurality of fillers 22, when the closing cap 7 is immersed in the liquid gas filled inside the container body 1, this gas is closed from the outer peripheral surface side of the closing cap 7. It is impregnated into the constituent material of the cap 7 and reaches the inner peripheral surface side of the closed cap 7 while promoting vaporization. Then, among the gases that have reached the space S, the gas that is still in a liquid state is also impregnated into the constituent material of the filler 22, and vaporization is promoted in the process of reaching the introduction hole 6b. The gas whose vaporization is promoted in this way is introduced into the space 6a.

On the other hand, in a state where the closing cap 7 is located in the gas filled and vaporized inside the container body 1, this gas permeates the closing cap 7 and the filler 22 and is introduced into the space 6a from the introduction hole 6b. Will be done.

In this way, the gas in the liquid state is efficiently prevented from being discharged to the outside from the tip end side of the stem 12. In addition, since the gas cylinder functions as described above regardless of the posture, there is a great degree of freedom in how to use it.

Incidentally, the amount of gas required for combustion and the ratio of gas to be vaporized are determined according to the thermal power, and the diameter of the flow path, the thickness of the block cap 7 and the like are appropriately adjusted accordingly.

In the above-described form, the blockage cap 7 is attached to the housing 6, but the present invention is not limited to this form. A flow tube for flowing gas is extended from the housing 6, and the outer periphery of the tubular portion of the flow tube is extended. The blockage cap 7 may be attached to the surface. Further, the gas to be sealed in the gas cylinder is a combustion gas in this example, but when this is used as an air ductor, DME gas, carbon dioxide gas, or the like is sealed inside the gas cylinder.

Next, with reference to FIGS. 6 and 7, the other embodiments of the present invention will be described with respect to the parts different from the above-described embodiments.

FIG. 6 is a cross-sectional view of a main part showing the internal structure of the gas cylinder according to another embodiment of the present invention, and FIG. 7A is a drawing showing the shape of the insertion member when viewed from the axial direction. B) is a drawing showing the shape of the insertion member when viewed from a direction perpendicular to the axial direction thereof. In the present embodiment, the insertion member 23 having a columnar shape in the axial direction of the stem 12 is fitted and inserted into the space 12a of the stem 12.

A flat notch-shaped surface 23a is formed in a part of the outer peripheral surface of the insertion member 23 in the circumferential direction. A gap 12a1 which is a part of the space 12a is formed between the notched surface 23a and the inner peripheral surface of the space 12a, and the gap 12a1 constitutes at least a part of the flow path R. There is.

Specifically, the gas introduced into the space 12a flows from the space on the side where the insertion member 23 is not present in the space 12a to the gap 12a1 side, and then is discharged to the outside of the gas cylinder, and in this process, further vaporization occurs. Be promoted. That is, the gap 12a1 functions as an orifice.

The insertion member 23 can also be used to adjust the weight of the stem 12.

On the other hand, when the work of filling the inside of the gas benbe from the outside via the space 12a is performed, this work is performed in a state where the insertion member 23 is not inserted into the space 12a.

Next, with reference to FIGS. 8 to 10, other embodiments of the present invention will be described with respect to the parts different from the above-described embodiments.

8 is a cross-sectional view of a main part showing the internal structure of a gas cylinder according to another embodiment of the present invention, FIG. 9 is an enlarged view of FIG. 8, and FIG. 10 is a torch type from the opening / closing mechanism shown in FIG. It is an enlarged view with the gas burner removed.

Male screws 11a for detachably mounting the torch-type gas burner 50 are formed on the outer peripheral surface of the accommodating portion 11 of the mountain cup 4 of the opening / closing mechanism 3 shown in these drawings. Incidentally, in the illustrated example, the outer peripheral surface of the main body 8 of the mountain cup 4 is fitted and inserted into the peripheral edge portion 2a of the canopy 2 and fixed.

On the outer peripheral surface side of the housing 6, a circular ring-shaped locking portion 6c protruding outward in the radial direction is integrally projected over the entire circumference thereof. The outer peripheral edge portion of the locking portion 6c abuts on the inner peripheral surface of the accommodating portion 11 over the entire circumference. The end portion on the bottom 8a side of the accommodating portion 11 in which a part including the locking portion 6c of the housing 6 is inserted and accommodated is plastically deformed inward in the radial direction over the entire circumferential direction and the locking portion. It constitutes 11b. The locking portion 11b prevents the housing 6 from coming out of the accommodating portion 11.

The gasket 19 is not attached to the outer peripheral surface of the stem 12 of the opening / closing mechanism 3, and one inner surface of the gasket 19 comes into close contact with one end of the stem 12 in the axial direction. A recess open to the outside is formed on the end face of the stem 12 on the gasket 19 side. This recess constitutes the space 12a. The space 12a is exposed to the outside through the hole 19a in the center of the gasket 19 formed in a circular ring shape and the insertion hole 10a.

The stem 12 is elastically urged toward the gasket 19 by the compression spring 21. In other words, the compression spring 21 is configured to directly act on the stem 12 with an elastic force that presses the stem 12 against the gasket 19 to bring it into close contact with the gasket 19. By moving the stem 12 so as to push it toward one side (specifically, the inner side) in the axial direction against the elastic force of the compression spring 21, the stem 12 is separated from the gasket 19 and both are separated. A gap C is formed between them.

The gas inside the space 6a passes through the insertion hole 10a from the gap S through the hole 19a and is discharged to the outside of the gas cylinder. That is, in the present embodiment, the hole 19a of the gasket 19 is a discharge hole for discharging gas, and the introduction hole 6b, the space 6a, the gap C, the discharge hole 19a, and the insertion hole 10a form the flow path R. There is. Then, by moving the stem 12 in the axial direction, the presence / absence of the gap S is switched, and the opening / closing switching of the flow path R is executed.

Further, in the present embodiment, an outer cap 24 is provided which is further outside the block cap 7 and is arranged inside the gas cylinder and is formed in a bottomed tubular shape having the same axis as the block cap 7. There is. The outer cap 24 is made of a material that does not allow gas to pass through (for example, synthetic resin), and the diameter of the peripheral wall thereof and the length in the axial direction are set to a value larger than that of the closing cap 7.

The outer cap 24 is mounted and fixed to the outer peripheral surface side of the closing cap 7 with its open end side facing the mountain cup 4 side and covering the entire outer side of the peripheral wall and the bottom of the closing cap 7. Specifically, the outer cap 24 is detachably fixed to the outer peripheral surface side of the closing cap 7 by a plurality of fixing tools such as bolts 27 oriented in the radial direction thereof.

One or more introduction holes 24a for introducing the gas outside the outer cap 24 and filled in the space 1a into the inside of the outer cap 24 are formed in the peripheral wall or the bottom of the outer cap 24. Has been done. Depending on the number and size of the introduction holes 24a, it is possible to adjust the amount of gas introduced to the closing cap 7 side. Further, the unused introduction hole 24a may be closed by an O-ring 28 mounted on the outer peripheral surface of the outer cap 24.

Further, in the illustrated example, the inner peripheral surface of the outer cap 24 and the outer peripheral surface of the closed cap 7 are made of a material capable of impregnating a liquid gas and formed in a cylindrical shape. Moreover, the impregnating body 29 is interposed. The impregnating body 29 has a shorter axial length than the closing cap 7, and is attached to the outer peripheral surface of the closing cap 7. The amount of gas introduced into the blockage cap 7 can also be adjusted by the impregnating body 29.

Further, the above-mentioned introduction hole 24a is also provided on the side (specifically, the upper end portion) of the peripheral wall portion of the outer cap 24 in contact with the impregnating body 29, and the gas in the gas cylinder is included from the introduction hole 24a. After being invaded by the invader 29, then invaded by the peripheral wall of the obstruction cap 7, and sufficiently vaporized, it is introduced to the inner peripheral surface side of the obstruction cap 7.

Next, the configuration of the gas burner 50 will be described. The gas burner 50 has a main body 51 and a nozzle 52 extending from the main body 51.

The main body 51 has a mounting portion 53 formed in a cylindrical shape so that it can be mounted on the outer peripheral surface side of the accommodating portion 11, a mounted portion 54 formed in a cylindrical shape so that the nozzle 52 can be mounted, and a lower side. It integrally has a connecting portion 56 for connecting the mounting portion 53 and the upper mounted portion 54.

The outer peripheral surface of the engaging member 57 formed in a cylindrical shape is mounted on the inner peripheral surface of the mounting portion 53 in a state of being screw-engaged. On the inner peripheral surface of the engaging member 57, a female screw 57a that can be screw-engaged with the male screw 11a of the accommodating portion 11 is formed. By engaging the male screw 11a and the female screw 57a, the gas burner 50 is attached to the opening / closing mechanism 3 of the gas cylinder. Even if this female screw is directly formed on the inner peripheral surface of the mounting portion 53 and the diameter of the inner circumference of the tubular portion 53 is reduced to be the same as or substantially the same as the diameter of the outer circumference of the accommodating portion 11. good.

When the gas burner 50 is mounted on the opening / closing mechanism 3, the outer peripheral surface of the mounting portion 53 is in contact with or close to the inner peripheral surface of the main body 8 of the mountain cup 4. In addition, at the time of this mounting, the insertion shaft portion 58 fixed to the connection portion 56 side and protruding to the gas cylinder side is inserted into the insertion hole 10a and the discharge hole 19a and is inserted into the recess 12a. The stem 12 is moved to the back side against the elastic force of the compression spring 21, and as a result, the above-mentioned gap C is generated and the flow path R is switched to the open state.

Incidentally, in this state, a gap (not shown) is formed between the outer periphery of the insertion shaft portion 58 and the inner peripheral surface of the discharge hole 19a to allow the flow of gas, and the outer circumference of the insertion shaft portion 58 and the outer circumference thereof. Since a gap (not shown) that allows the flow of gas is also formed between the inner peripheral surface of the insertion hole 10a, the gas in the space 6a is introduced into the main body 51.

Inside the connection portion 56 of the main body 51, it was introduced from the gas cylinder opening / closing mechanism 3 to the inner peripheral surface side (specifically, the space on the inner peripheral surface side of the engaging member 57) of the mounting portion 53 of the main body 51. The inflow space 59 into which the gas flows, the switching space 61, the flow space 62 in which the gas in the inflow space 59 is introduced into the switching space 61, and the outflow in which the gas in the switching space 61 is led out to the inner peripheral surface side of the mounted portion 54. Space 63 is formed. That is, the inflow space 59, the flow space 62, the switching space 61, and the outflow space 63 form at least a part of the gas flow path for flowing the gas discharged from the gas cylinder to the nozzle 52 side. ..

At least a part of the switching space 61 becomes an inserted space 61a formed in the radial direction of the main body 51. A switching shaft 64 is slidably fitted and inserted in the inserted space 61a in the axial direction thereof. Incidentally, the connection portion 56 integrally has a support portion 66 which is a tubular portion formed so as to project radially outward, and the space on the inner peripheral surface side of the support portion 66 is also a part of the insertion space 61a. The protruding side end of the support portion 66 in the insertion space 61a is opened, and the switching shaft 64 is inserted from the open end side of the insertion space 61a.

A female screw 66a is formed in at least a part of the inner peripheral surface of the support portion 66, while the female screw 66a is formed on the outer peripheral surface of the switching shaft 64 when the switching shaft 64 is inserted into the insertion space 61a. A male screw 64a that is screw-engaged with 66a is formed.

According to the configuration, by rotating the switching shaft 64 to one side around the shaft, the switching shaft 64 slides to the back side in the insertion direction and the gas flow path described above is switched to the closed state. On the other hand, by rotating the switching shaft 64 to the other side around the shaft, the switching shaft 64 slides to the extraction side in the insertion direction and the gas flow path is switched to the open state.

Incidentally, a grip portion 68 is provided at the end portion opposite to the end portion inserted into the insertion space 61a of the switching shaft 64 and exposed to the outside, and the operator who grips the grip portion 68 is able to perform the grip portion 68. With a small operating force, the switching shaft 64 can be rotated in the axial direction.

The nozzle 52 has an insertion block 69 that is inserted and fixed to the inner peripheral surface side of the mounted portion 54 in a fitted state, and a base end side that is fixed to the insertion block 69 at one end and a tip side that is the other end. It has a nozzle body 71 extending to a side away from the gas cylinder. The nozzle body 71 is formed in a cylindrical shape, and the outer peripheral surface of the portion exposed to the outside from the mounted portion 54 of the insertion block 69 is fitted and fixed to the inner peripheral surface side of the base end portion thereof. Incidentally, the nozzle main body 71 is bent in a dogleg shape at the middle portion in the total length direction.

Inside the block 69, a flow space 69a through which the gas from the outflow space 63 flows is formed, and the gas in the flow space 69a flows into the inside from the base end side of the nozzle body 71 and from the tip end side to the outside. It is discharged. By igniting the discharged gas, a flame is ejected from the tip side of the nozzle 52. At this time, the above-mentioned means for vaporizing the gas efficiently promotes the vaporization regardless of the posture of the gas cylinder. Therefore, there is no need to worry about the attitude of the gas.

3 Opening and closing mechanism 6 Housing 7 Blocking cap (blocking member)
12 Stem (actuator)
12a Space 14 Exposed part (cylindrical part)
19 Gasket (opening and closing member)
19a Discharge hole 22 Filler (felt material)
23 Insertion member R Flow path

Claims (6)

An opening / closing mechanism for a gas cylinder filled with at least a partially liquefied gas.
A housing in which at least a part of a flow path for discharging the gas filled inside the gas cylinder to the outside is formed.
An actuating body that is supported by the housing and can be actuated so that the flow path is opened and closed.
It is provided with a closing member that closes the flow path and separates the flow path from the space filled with gas in the gas cylinder.
The obstruction member is composed of a material capable of impregnating the gas in a liquid state so that the gas impregnated in the obstruction member is introduced into the flow path while being vaporized.
The actuating body is a stem formed in the actuating direction thereof.
At least a part of the stem is formed in a hollow shape, and a space extending in its own axial direction is formed inside the stem.
One end side of the inside of the stem in the axial direction of the space is opened outward.
An insertion member extending in the axial direction is inserted into the inner peripheral surface side of the space inside the stem in a fitted state.
A gas cylinder opening / closing mechanism characterized in that a gap formed between an outer peripheral surface of the insertion member and an inner peripheral surface of the space constitutes a part of the flow path. A ring-shaped opening / closing member mounted on the outer peripheral side of the stem is provided.
The stem is provided with a communication hole for communicating the outer peripheral side thereof and the space inside the stem.
The opening / closing member is attached to the stem so that the communication hole is closed.
The first aspect of the present invention has a structure in which the communication hole blocked by the opening / closing member is opened by operating the stem so that the opening / closing member is elastically deformed and operated on one side in the axial direction thereof. The opening and closing mechanism of the described gas cylinder. An opening / closing mechanism for a gas cylinder filled with at least a partially liquefied gas.
A housing in which at least a part of a flow path for discharging the gas filled inside the gas cylinder to the outside is formed.
An actuating body that is supported by the housing and can be actuated so that the flow path is opened and closed.
It is provided with a closing member that closes the flow path and separates the flow path from the space filled with gas in the gas cylinder.
The obstruction member is composed of a material capable of impregnating the gas in a liquid state so that the gas impregnated in the obstruction member is introduced into the flow path while being vaporized.
The housing has a cylindrical portion located in the gas cylinder and has a tubular portion.
A part of the flow path is formed on the inner peripheral surface side of the cylindrical portion.
The closing member is formed in a bottomed tubular shape so as to be external to the tubular portion and block the flow path.
A gas cylinder opening / closing mechanism characterized in that the tubular portion is integrally formed with the housing. An opening / closing mechanism for a gas cylinder filled with at least a partially liquefied gas.
A housing in which at least a part of a flow path for discharging the gas filled inside the gas cylinder to the outside is formed.
An actuating body that is supported by the housing and can be actuated so that the flow path is opened and closed.
It is provided with a closing member that closes the flow path and separates the flow path from the space filled with gas in the gas cylinder.
The obstruction member is composed of a material capable of impregnating the gas in a liquid state so that the gas impregnated in the obstruction member is introduced into the flow path while being vaporized.
The housing has a cylindrical portion located in the gas cylinder and has a tubular portion.
A part of the flow path is formed on the inner peripheral surface side of the cylindrical portion.
The closing member is formed in a bottomed tubular shape so as to be external to the tubular portion and block the flow path.
The inside of the tubular shape of the closing member is filled with a filler capable of impregnating liquid gas.
The liquid gas that was not vaporized in the process from the tubular outer peripheral surface to the inner peripheral surface of the closing member was impregnated into the filler, and the filling material was impregnated.
A mechanism for opening and closing a gas cylinder, characterized in that a plurality of the fillers are filled inside the tubular shape of the closing member of the gas. The gas cylinder opening / closing mechanism according to claim 4 , wherein the filler is a felt material. The opening / closing mechanism for a gas cylinder according to any one of claims 4 or 5 , wherein the plurality of fillers are arranged in the flow direction of the gas.

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