JPH05317435A - Lung power valve for open type respirator - Google Patents

Abstract

PURPOSE:To retain a rocking member and a diaphragm at a retaining position easily by arranging an opening/closing means between an air port and an inhalation pressure chamber with the supply of a gas for exhalation to the air hole on the incoming side of the main body to open or close the air port facing the inhalation pressure chamber with the displacement of a diaphragm toward an inhalation chamber. CONSTITUTION:An opening/closing means 19 is so arranged to open an incoming air port 15 to which a gas for exhalation is supplied with the displacement of a diaphragm 6 toward an inhalation pressure chamber 10 while closing it with the displacement of the diagram 6 toward an atmospheric pressure chamber 9. A rocking member 57 which is pivoted on a lid body 4 free to rock is arranged to be engaged with the diaphragm 6 on the longitudinal one end side thereof and engages one end of a rocking member displaced toward the atmospheric pressure chamber 9 to retain an angular displacement of the rocking member toward the inhalation pressure chamber 10. Then, a retaining spring 66 is adapted to release the retaining state by suction and a pressing member 73 is provided with a wedge surface 73a formed thereon for pressing the other end of the rocking member outwards in the direction of pressing by a pressing operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open-respiratory positive pressure type pulmonary valve.

[0002]

2. Description of the Related Art A typical prior art is, for example, Japanese Patent Laid-Open No.
2-114569 (Japanese Patent Application No. 61-264146). In this prior art, the other end of the tilting lever, which is a rocking member, is pressed by an operating member serving as a pressing member to angularly displace the rocking member toward the atmospheric pressure chamber, and the one end of the rocking member is moved. Is locked by a pair of spring members as locking springs to prevent the diaphragm from displacing to the side of the intake pressure chamber and prevent leakage of breathing gas.

In such a prior art, the pair of springs have two functions of locking the tilting lever and urging the tilting lever toward the intake pressure chamber to maintain a positive pressure. Therefore, if the spring force for releasing the locked state of the tilt lever is changed, the positive pressure value, which is an important function of the lung valve, deviates from the required value. If the spring force is changed so that the positive pressure value becomes the required value, the force for releasing the locked state of the tilt lever changes undesirably,
There is a problem that the locked state cannot be released smoothly or the locked state is lost.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to make it possible to adjust the suction force required to release the locked state of the swinging member and the diaphragm when locked.
In addition, the open type respiratory force valve of the open type respirator with improved operability that can adjust the positive pressure in the face piece and can easily lock the rocking member and the diaphragm at the locking position is provided. It is to be.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a main body, a lid detachably attached to the main body, a main body, and a peripheral portion sandwiched by the lid attached to the main body. The diaphragm chamber that is formed between the body and the body is divided into an atmospheric pressure chamber that communicates with the atmosphere and an inspiratory pressure chamber that guides the inspiratory pressure, and a diaphragm that communicates with the inspiratory pressure chamber and is supplied with breathing gas. Side opening hole is opened by the displacement of the diaphragm toward the intake pressure chamber side and is closed by the displacement of the diaphragm toward the atmospheric pressure chamber side, and is pivotably supported by the lid body in the longitudinal direction. The swing member that engages with the diaphragm at one end side and the one end of the swing member that is displaced toward the atmospheric pressure chamber side are engaged to lock the angular displacement of the swing member toward the intake pressure chamber. The locking spring that releases the locked state by suction and the lid And a pressing member that is provided detachably and has a wedge surface that presses the other end of the rocking member outward in the pressing direction by a pressing operation. It is a force valve.

Further, according to the present invention, a bypass vent hole is formed in the main body, the bypass vent hole communicating with a space upstream of the opening / closing means of the intake hole from the intake pressure chamber in the supply direction of the breathing gas. The vent hole is provided with a pressure regulating valve for adjusting the supply amount of the intake gas to the intake pressure chamber.

Further, the present invention is characterized in that the swinging member is provided with a display portion which is exposed to the outside from a light transmitting portion formed on the lid body in a state of being angularly displaced toward the atmospheric pressure chamber side.

[0008]

According to the present invention as set forth in claim 1, a lid is detachably attached to the main body, the peripheral edge of the diaphragm is sandwiched between the main body and the lid, and the diaphragm chamber in which the diaphragm is housed is It is partitioned into an atmospheric pressure chamber that communicates with the atmosphere and an intake pressure chamber that guides the intake pressure. Breathing gas is supplied to the vent hole on the inlet side of the main body, and opening / closing means is provided between the vent hole and the intake pressure chamber. The opening / closing means opens the ventilation hole facing the intake pressure chamber by displacing the diaphragm toward the intake chamber, and closes the ventilation hole by displacing the diaphragm toward the atmospheric pressure chamber side. The opening / closing means can be opened / closed by such displacement of the diaphragm to supply the breathing gas in accordance with the breathing of the user.

A swinging member is pivotally supported on the lid, and one end portion side in the longitudinal direction thereof is engaged with the diaphragm. Therefore, the oscillating member oscillates due to the displacement of the diaphragm corresponding to the breathing, and when the oscillating member is displaced toward the atmospheric pressure chamber side, the tip end thereof is locked by the locking spring. As a result, the displacement of the diaphragm toward the intake pressure chamber side is restrained, the opening / closing means is kept closed, and leakage of breathing gas is prevented. When the rocking member is locked by the locking spring, a pressing operation of the pressing member causes the wedge surface to press the other end of the rocking member outward in the pressing direction, so that a large force is generated. It is possible to angularly displace the rocking member and lock the tip end of the rocking member to the locking spring without requiring a pressing force. Therefore, even when the respirator is not used, it is possible to easily prevent the diaphragm from being easily displaced toward the intake pressure chamber side, thereby opening the opening / closing means and leaking the breathing gas with a simple operation. it can.

According to the second aspect of the present invention, the intake pressure chamber and the space on the upstream side of the opening / closing means of the vent hole are communicated with each other by the bypass vent hole, and the bypass vent hole is provided with the pressure regulating valve. By adjusting the pressure regulating valve, the opening degree of the bypass vent hole can be adjusted, and thereby, the supply amount of the breathing gas to the intake pressure chamber can be adjusted.

According to the third aspect of the present invention, a transparent portion is formed on the lid, and the display portion provided on the swing member can be visually recognized through the transparent portion. As a result, it can be easily confirmed from the outside that the rocking member is angularly displaced toward the atmospheric pressure chamber side, and thereby, forgetting to switch the rocking member to the locking position can be prevented.

[0012]

1 is a front view showing a lung force valve 1 according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the lung force valve 1. For example, an open-ended respirator used for fire fighting activities in the event of a fire requires a user to carry a pressure vessel filled with a breathing gas such as high-pressure air of about 300 kgf / cm ² under pressure. , A breathing gas of about 300 kgf / cm ² released by opening a container valve that is hermetically screwed to the filling / extracting port for breathing gas provided in the pressure container,
A decompressor reduces the pressure to, for example, about 6 kgf / cm ^{2, and} guides the reduced breathing gas to a lung force valve 1 that is detachably connected to a face piece via a flexible air guide tube, and is used for vigorous breathing. The suction resistance is reduced as much as possible to allow smooth breathing.

Such a pulmonary valve 1 basically comprises a main body 3
And a lid body 4 which is detachably attached by a ring 2 screwed to the body body 3, and the joint portion of the body body 3 and the lid body 4 is made of a flexible and elastic material such as rubber. Is covered with an annular cover body 5. The main body 3
The lid 4 attached thereto forms a diaphragm chamber 7 in which the diaphragm 6 is accommodated, and the peripheral edge portion 8 of the diaphragm 6 is sandwiched between the main body 3 and the lid 4, and the diaphragm 6 is held by the diaphragm 6. Is partitioned into an atmospheric pressure chamber 9 communicating with the atmosphere and an intake pressure chamber 10 into which a suction force is introduced. The intake pressure chamber 10 communicates with a vent hole 13 in an inlet-side connecting portion 11 to which the air guide pipe is connected and a vent hole 15 in an outlet-side connecting portion 14 to which the face piece is connected, Due to the suction, the diaphragm 6 moves into the intake pressure chamber 10
When the valve body 16 is displaced to the side, the valve rod 16 is displaced downward, the valve body 17 is separated from the valve seat 18, the vent hole 13 on the inlet side and the intake pressure chamber 10 communicate with each other, and a gas for breathing flows in. The working gas is supplied to the face piece from the vent hole 15 on the outlet side by suction. These valve rod 16, valve body 17 and valve seat 18
The opening / closing means 19 is constituted by including.

FIG. 3 is a sectional view showing a specific structure of the lung valve 1. The inlet-side connecting portion 11 is made of metal, and an external screw 21 for connecting the air guide pipe is engraved at an end portion on the upstream side of the breathing gas supply direction A. This connection part 11
An annular recessed groove 23 is formed at an end portion on the downstream side of the supply direction A, and an O-ring 24 is fitted in the recessed groove 23. Another groove 2 is provided in the vicinity of the upstream side of the groove 23 in the supply direction A.
5 is formed, and a pin or the like (not shown) is fitted therein so that the connecting portion 11 is rotatably retained.

Such a connecting portion 11 is the opening / closing means 1 described above.
9 is attached to the mounting portion 26. The mounting portion 26 is made of metal and has a vent hole 27 communicating with the vent hole 23 of the connecting portion 11. An inner screw 28 is engraved on the inner peripheral surface of the end of the vent hole 27 on the downstream side in the supply direction A, and the valve seat 18 is integrally formed on the inner screw 28.
A screw member 30 having an outer screw 29 engraved on the outer peripheral surface is screwed. An annular groove 31 is formed on the outer periphery of the screw member 30, and an O-ring 33 is fitted in the groove 31 so that the O-ring 33 is fitted on the inner peripheral surface on the downstream side of the inner screw 28 in the supply direction A. Are in contact with each other, and the inner screw 28 and the outer screw 2
The breathing gas is prevented from leaking from the ventilation holes 13 and 27 on the upstream side of the valve body 17 seated on the valve seat 18 in the supply direction A through the gap with the valve seat 9. In this way, the opening / closing means 19 is detachably attached to the attachment portion 26 by the screw member 30.

A rising portion 34 that rises in the direction perpendicular to the member axis is integrally formed in the mounting portion 26, and a pressure regulating valve that opens / closes a valve hole 35 communicating with the vent hole 27 is formed in the rising portion 34. A certain valve body 36 is housed, and this valve body 36 is formed in a valve chamber 37. A valve rod 38, on which the valve element 36 is mounted, is fitted in the valve chamber 37, and an operation piece 39 made of synthetic resin is fixed to the tip of the valve rod 38 by a pin or the like. By angularly displacing the operation piece 39, the valve rod 38 is screwed forward / backward so that the valve body 36 can close or open the valve hole 35.

An O-ring 40 is also attached to the valve rod 38, and an airtight space 41 is formed in the valve chamber 37. The space 41 communicates with the vent hole 27 when the valve element 36 separates from the valve hole 35. The space 41 as described above is provided with the intake pressure chamber 1 through the bypass ventilation holes 43 and 44.
It communicates with 0. Therefore, even if the valve body 17 of the opening / closing means 19 is closed, if the operating piece 39 is operated to open the valve body 36, the breathing gas supplied to the ventilation holes 13 and 27 will flow into the valve hole 35 and the space. The gas for breathing can be introduced into the intake pressure chamber 44 through 41 and the bypass vent holes 43 and 44, and the breathing gas can be supplied at a constant flow rate into the face body regardless of suction or exhaust of the user. By this, the opening / closing means 19
Even if you can not inhale due to suction due to a failure of,
A breathing gas can be introduced into the face piece to breathe.

One end of a valve rod 45 protruding into the intake pressure chamber 10 is fixed to the valve body 17 of the opening / closing means 19. In this valve rod 45, the conical spring 46 causes the valve body 17 to move to the valve seat 1
When the valve rod 45 is angularly displaced against the spring force of the conical spring 46, the valve element 17 separates from the valve seat 18 and opens. The breathing gas in the ventilation holes 13 and 27 flows into the intake pressure chamber 10 through the valve hole 47. A substantially spherical abutment piece 48 is fixed to the other end of the valve rod 45 as described above.
Reference numeral 8 is in light contact with the diaphragm 6 from the intake pressure chamber 10 side. Such a valve rod 45 is guided in the vertical direction of FIG. 3 along the guide elongated hole 50 of the guide plate 49 fixed to the main body 3.

The diaphragm 6 has a flexible film 53 made of a flexible and elastic material such as rubber or silicon, and a metal holding plate 54 to which the flexible film 53 is pressure bonded. .. The holding plate 54 has a pair of support pieces 5
5 is erected, and a connecting piece 56 is fixed to the upper end thereof. The diaphragm 6 is moved to the atmospheric pressure chamber 9 by each supporting piece 55.
When it is displaced to the side, it comes into contact with the decorative cover 83, and the displacement of the diaphragm 6 to the atmospheric pressure chamber 9 side is held at the top dead center.

The lid 4 is provided with a swinging member 57 that is swingable in the arrow B1 and B2 directions within the atmospheric pressure chamber 9. The swinging member 57 is provided with an inverted U-shaped display piece 58 colored in, for example, red, and the display formed on the lid body 4 when the swinging member 57 rises in the arrow B1 direction. The display piece 5 is externally provided through a display hole 59 as a part.
8 can be visually recognized. In this way, when the red color of the display piece 58 is displayed from the display hole 59, the swing member 57
When the connecting piece 56 is pushed upward from below, the diaphragm 6 is in a locked state in which the diaphragm 6 is displaced toward the atmospheric pressure chamber 9 side and is prevented from being displaced toward the intake pressure chamber 10 side.

A contact piece is formed at one longitudinal end of the swinging member 57, and is formed of a material having good sliding property such as synthetic resin, and has a contact surface 60 facing the diaphragm 6 and forming a part of a spherical surface. 61 is fitted. Further, one end of a spring 63 is locked to the swing member 57 and is biased by the spring in the arrow B1 direction or the B2 direction. The other end of the spring 63 is locked by an adjusting screw 64 screwed to the lid 4, and the spring force of the spring 63 is adjusted by screwing / retracting the adjusting screw 64. Is configured to be able to.

The tip 65 on one end side of the swing member 57 is
The rocking member 57 is locked by the locking spring 66 when the rocking member 57 rises in the arrow B1 direction. This locked state can be released by displacement of the diaphragm 6 from the atmospheric pressure chamber 9 to the intake pressure chamber 10 side by suction.

The locking spring 66 is formed by bending a coil spring into a U-shape and attaching both ends of the locking spring 66 to a projection 67 formed integrally with the lid 4 by a pressing plate 68 and a bolt 69. The locking spring 66 is easily bent upward so that the tip portion 65 is locked, and the locking spring 66 is released downward by a force larger than the upward displacement so as to release the locking plate. A long hole 70 is formed in 68, and the amount of protrusion from the protrusion 67 can be adjusted. As a result, when the locking state of the swinging member 57 from the locking spring 66 is released and the spring force of the locking spring 66 is firm, the pressing plate 68 is retracted to the right in FIG.
The amount by which the locking spring 66 projects from the tip of the is increased, whereby the spring force can be weakened and the force for releasing the locked state can be adjusted to be small.

At the other end of the swinging member 57 in the longitudinal direction,
A guide portion 74 is formed which rises up from the other end portion at a substantially right angle and bends leftward as it goes upward in FIG. The guide portion 74 is detachably attached to the decorative cover 83 and is pressed by the pressing portion 73 having the conical wedge surface 73a of the pressing piece 71 made of a flexible and elastic material such as rubber. It The guide portion 74 is curved and extends immediately below the tip end portion of the pressing portion 73 on the side opposite to the one end portion with respect to the pivotal support piece 57 that pivotally supports the swinging member 57, and presses the pressing piece 71. By operating the pressing portion 73, the arc-shaped guide surface 76 of the guide portion 74 is laterally moved,
That is, it is pressed to the left in FIG. Such a wedge surface 73a
By the so-called wedge mechanism formed by the guide surface 76 and the so-called guide surface 76, the swinging member 57 can be lifted in the arrow B1 direction and locked by the locking spring 66 with a slight force.

FIG. 4 is a bottom view of the lid body 4 as seen from below, and FIG. 5 is a sectional view taken along the section line VV of FIG. The locking spring 6 is attached to the protrusion 67 formed on the lid 4.
Fitting grooves 77, 78 into which both ends of 6 are fitted are formed, and retaining projections 79, 80 projecting into these fitting grooves 77, 78 and fitting between the respective rows of the locking spring 66. Are integrally formed. Further, the lid body 4 has a convex portion 81 protruding in the diameter line direction, and the decorative cover 83 shown in FIG. The pressing piece 71 is fitted on the decorative cover 83, and
A transparent display plate 84 provided in the display hole 59 is sandwiched between the cover body 4 and the cover 4. By making the decorative cover 83 attachable to and detachable from the lid body 4 in this manner, the pressing piece 71 that has deteriorated due to long-term use can be easily replaced.

[0026]

As described above, according to the present invention, the wedge surface of the pressing member presses the other end of the rocking member outward in the pressing direction. The member can be angularly displaced to lock the diaphragm at the locking position on the atmospheric pressure chamber side. In addition, since the lid is detachably attached to the main body, disassembly and assembly are easy,
It is possible to easily and surely perform replacement of parts and maintenance and to improve convenience.

Further, since the main body is formed with the bypass vent hole which is opened and closed by the pressure regulating valve, the breathing gas can be supplied to the face piece side even if the opening and closing means fails, and high safety is achieved. be able to.

Further, since the swinging member is provided with the display portion, it is possible to easily visually confirm that the diaphragm is in the locked state from the outside, and it is easy to confirm the leakage of the breathing gas. ..

[Brief description of drawings]

FIG. 1 is a front view showing a simplified overall configuration of a pulmonary force valve 1 according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the pulmonary force valve 1.

FIG. 3 is an enlarged cross-sectional view of a pulmonary force valve 1.

FIG. 4 is a bottom view of the lid body 4 as seen from below.

5 is a sectional view taken along the section line VV in FIG.

[Explanation of symbols]

 1 Pneumatic valve 3 Main body 4 Cover body 5 Cover body 6 Diaphragm 7 Diaphragm chamber 8 Peripheral part 9 Atmospheric pressure chamber 10 Intake pressure chamber 11,14 Connection part 13,15,27 Vent hole 19 Opening / closing means 41 Space 43,44 Bypass passage Pore 45 Valve rod 46 Conical spring 47 Valve hole 57 Swing member 58 Display piece 59 Display hole 63 2 Position stabilizing spring 66 Engagement spring 79, 80 Detachment protrusion

Claims (3)

[Claims] 1. A main body, a lid that is detachably attached to the main body, a main body, and a lid attached to the main body sandwiches a peripheral edge portion, and is formed between the main body and the lid. A diaphragm that divides the diaphragm chamber into an atmospheric pressure chamber that communicates with the atmosphere and an intake pressure chamber that guides the inspiratory pressure; Opening / closing means that is opened by the displacement of the diaphragm toward the intake pressure chamber side and that is closed by the displacement of the diaphragm toward the atmospheric pressure chamber side, and is swingably supported by the lid body, and is engaged with the diaphragm at one end in the longitudinal direction. Engage with the matching swing member and the one end of the swing member displaced to the atmospheric pressure chamber side, and the angular displacement of the swing member to the intake pressure chamber side is locked, and the locked state is obtained by suction. The lock spring that releases the And a pressing member having a wedge surface that presses the other end of the swing member outward in the pressing direction by a pressure operation. 2. A bypass vent hole is formed in the main body, the bypass vent hole communicating with a space upstream of the opening / closing means of the inlet hole from the intake pressure chamber in the supply direction of the breathing gas. 2. A pressure regulating valve for adjusting the amount of intake gas supplied to the intake pressure chamber is provided.
An open respiratory lung valve as described. 3. The swing member is provided with a display portion that is exposed to the outside from a light-transmitting portion formed on the lid body while being angularly displaced toward the atmospheric pressure chamber side. Open respiratory lung force valve.