JP2515536Y2 - Inflation valve for inflatable life jacket - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention is designed to secure the air pressure in the air reservoir by attaching an elastic cap to the outlet of the exhalation-injection valve housing and sliding it from the edge of the outlet toward the valve body while keeping the airtightness. By raising the force acting in the opening direction of the valve body and the urging force of the spring acting on the valve body in a substantially balanced state, the valve body is brought into contact with the valve seat and maintained in that state, so that when necessary, The present invention relates to an exhalation injection valve for an inflatable life jacket in which a valve body is opened by a predetermined expiratory pressure and gas in the jacket is prevented from leaking.

[0002]

2. Description of the Related Art Conventionally, an inflatable life jacket is equipped with an exhalation injection valve for supplementing air when the gas in the jacket is reduced during use. In addition to the above purpose, this exhalation inhalation valve is used to inject air from the exhalation inhalation valve into the vest when periodically inspecting the vest, and to exhaust internal air from this valve after the inspection is completed. Also used for.

As shown in FIG. 5, a conventional exhalation injection valve is provided with a valve seat b on the open side of a housing a, and the valve seat b is provided.
A stem d is integrally inserted into a guide cylinder c provided above the. An O-ring e is fitted to the lower end of the stem d and is fixed by a flange f, and a blow port g is integrally provided at the upper end of a guide cylinder c into which the stem d is inserted. In addition, the spring h biases the air outlet g with one surface of the valve seat b as a fulcrum, and the O-ring e has a so-called check valve structure in which the O-ring e is tightly pressed against the valve seat b.

[0004]

The exhalation injection valve described in the prior art functions as a check valve by bringing the O-ring e into close contact with the valve seat b by the urging force of the spring h. . Therefore, when the exhalation-injection valve is closed, the O-ring e is pressed against the valve seat b, but because the limited biasing force of the spring h completes this close contact, the O-ring e and the valve seat are closed. The contact area with b is made as small as possible to increase the pressing force per unit area of the contact surface. For this reason, there is a drawback that the O-ring e is deformed and leakage easily occurs. That is, since the force in the valve opening direction applied to the O-ring e and the flange f is only atmospheric pressure, if the contact area between the O-ring e and the valve seat b is reduced,
There is a drawback that the contact portion of the O-ring e is easily deformed while the O-ring e is pressed against the valve seat b by the biasing force of the spring h. For this reason, a valve that has been closed for a long time may not be able to open at the designed expiratory pressure, or the valve once opened may not completely close,
It had the drawback of leaking.

Further, this type of life jacket is inflated to a predetermined internal pressure for 24 hours or more at the time of manufacture and at the time of regular inspection for leak inspection, and the body jacket is provided with a special valve for this inspection. In general, this is done through this exhalation infusion valve. Therefore, after the inspection is completed, in order to discharge the air in the inflated vest, the stem d of the exhalation valve is pushed down and the O-ring e is seated until the air in the vest is released.
Must be kept away from. For this reason, there has been a troublesome need of a special stopper for pushing down the air outlet g of the valve for a long time until the air in the body garment is released.

The present invention has been made in view of such a problem in the exhalation injection valve of the conventional inflatable life jacket, and its purpose is to provide a biasing force of a spring acting on the valve body. The air reservoir having an air pressure in equilibrium with the pressure is applied to the exhalation valve so that the pressure acts in the direction opposite to the biasing force of the spring, and the generated air pressure reduces the load of the spring applied to the valve body. Deformation of the valve body,
Prevents settling, can be opened at the designed expiratory pressure when necessary even if it is closed for a long period of time, and after opening it can be closed without leakage, and the cap is capped on the blow-in port. This prevents minute dust, which is one of the causes of valve leakage, from entering the valve, and also to discharge air inside the vest after the leak inspection at the time of manufacturing and checking the vest. The purpose is to provide an exhalation valve that does not require the use of a special temporary stopper.

[0007]

In order to achieve the above object, a housing of an exhalation injecting valve secures a desired amount of air from a top surface of a cap to be attached to the exhalation injecting valve to a valve element inside the valve. The air reservoir is formed, the outer peripheral portion of the outlet of the housing is made a smooth surface, and a cap made of a detachable elastic body is tightly attached to the outlet and then slid toward the valve body, It is formed such that the air pressure stored in the air reservoir is increased and the valve body abuts the valve seat in a state where this air pressure and the compression load of the spring biased by the valve body are balanced. .

The cap is formed integrally with a small diameter portion through a step, and a knurled protrusion is provided on the outer periphery of the small diameter portion, and the protrusion is lightly pressed into the outlet to blow the small diameter portion. It is preferable to form it with an outer diameter dimension that allows it to be left standing in the inserted state.

[0009]

After the cap is put on the outlet of the valve, the outer peripheral surface of the outlet and the inner peripheral surface of the cap are brought into close contact with each other and slid until the edge of the outlet reaches the step on the inner surface of the cap. In the valve, a desired air pressure is stored in the space from the bottom surface of the cap to the valve body, that is, the air reservoir. That is, when the cap is put on and then slid as described above, the pressure in the air reservoir increases as the cap slides, but as the cap slides,
The pressure in the air reservoir increases further, and it is further slid,
When the edge of the air outlet reaches the step inside the cap, a part of the air in the air reservoir separates the valve body from the valve seat and flows into the body garment. The urging force, that is, the closing pressure of the valve is balanced and the valve is closed and maintained in this state. In this state, since the air pressure in the air reservoir is also used in the direction of opening the valve, even if the valve body is pressed against the valve seat by the urging force of the spring for a long period of time, the valve body and the valve seat will not contact each other. Even if the contact area is small, it is possible to prevent the valve body, which is an elastic body, from being depressed or deformed. As a result, the valve that was closed for a long time
When necessary, it can be opened with a designed expiratory pressure (generally, a pressure of about 30 mm / Hg), and after the opening, the closing is completed and no leakage occurs.

Further, the cap is capped on the blow-in port so as to prevent fine dust or the like, which is one of the causes of leakage of the valve, from entering the valve. In particular, since this type of life jacket is worn in the sea, it is desirable that salt attachment can be prevented, and the expiratory valve of the present invention satisfies this.

Further, the cap of the present invention is attached to the exhalation infusion valve in a flexible manner, and since the small diameter portion of the tip of the cap can be reversed and inserted into the outlet of the valve, this small diameter portion is attached. When inserted, the tip of the cap pushes the spring retainer inside the exhalation valve inward. As a result, the valve body separates from the valve seat. On the other hand, since the tip of the cap is provided with a plurality of knurled protrusions parallel to the central axis of the cap, when the cap is fitted into the blower outlet, the air in the garment is generated by this. It is discharged to the outside through the gap. Therefore, the air in the vest can be exhausted without the need for a special temporary stopper when the vest is checked for leaks.

Furthermore, in the exhalation-injection valve of the present invention, the valve seat is formed so as to have a truncated cone shape in cross section, while a concave valve body is fitted to the lower end of the stem, and the valve body is the valve. The seat is configured to linearly surround the seat. In this way, the contact area between the valve body and the valve seat is reduced, and therefore high airtightness can be obtained even if the pressing force of the spring is small.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described with reference to FIGS. 1 to 4. The exhalation injection valve according to the present invention is enclosed in the housing 1 in a direction forming a predetermined angle with respect to the central axis of the housing 1. A valve seat 2 having a truncated cone shape in cross section is provided.
The valve seat 2 is provided with an elastic valve body 5 fitted in a groove 4 at the floor end of the stem 3 and having a substantially concave cross section so as to come into contact with the valve seat 2 in a substantially linear contact. The other end of the spring 6
It is firmly fitted to the concave bearing 7 provided at the center of the. An air passage hole 8 is provided around the bearing 7 in the spring receiver 6, and an outer cylinder 9 is integrally provided with the spring receiver 6 around the air bearing hole. Is guided by the inner peripheral surface of the blowout port 10 so that it can move in the axial direction of the housing 1. Inside the outer cylinder 9, a coil spring 11 biases a spring receiver 6 so that the valve body 5 makes a substantially linear contact with the valve seat 2 with the valve seat 2 as a fulcrum. A cap 12 made of an elastic material is fitted to the blowout port 10 of the expiratory injection valve configured as described above so that the end edge of the blowout port 10 has a step 1 inside the cap 12.
3 has been reached. In the expiratory injection valve of the present invention thus configured, the inner peripheral surface of the cap 12 is tightly fitted to the outer peripheral surface of the outlet 10, so that the air reservoir portion 14 extends from the top surface of the cap 12 to the valve body 5. It is formed.

The expiratory injection valve of the present invention is used by tightly fitting the knurled portion 15 provided in the housing 1 into an air supply pipe (not shown) made of an elastic material attached to the inflatable life jacket. It is a thing. In the breath injection valve of the present invention thus mounted, the cap 12 is removed in the leak inspection at the time of manufacturing the life jacket, and after leaving the cap 12 for a predetermined time at a predetermined internal pressure filled with air, a pressure gauge is attached to the blower 10. The pressure is measured by inserting the tube end of the exhalation-injection valve when the air in the vest is exhausted after the end of this inspection. The cap 12 of the exhalation injection valve is turned upside down as shown in FIG. When the small-diameter portion 16 of is inserted into the air outlet 10,
The top surface of the small-diameter portion 16 of the cap 12 pushes down the spring receiver 6 against the bias of the spring 11 to separate the valve body 5 from the valve seat 2. When separated from the valve body 5, the air in the body garment has a knurled protrusion 17 on the inner peripheral surface of the outlet 10 and the outer peripheral surface of the cap 12.
It is discharged to the outside through the space of the concave groove 18 formed in 1. As described above, in the exhalation injection valve of the present invention, the cap 12 attached to the exhalation injection valve does not require a special stopper,
On the contrary, the air inside the body garment can be evacuated just by inserting it into the air outlet 10 and leaving it for a while.

The small-diameter portion 16 integrated with the cap 12 is formed to have an outer diameter dimension such that a knurled protrusion 17 provided on the outer periphery is lightly pressed into the outlet 10.
Is preferably formed so that it can be left standing in the state in which it is inserted into the air outlet 10.

[0016]

Since the present invention has the above-mentioned structure, since the valve element urged by the spring is in contact with the valve seat in equilibrium with the pressure in the air reservoir, it is generally made of rubber. It is also possible to prevent the valve body, which is an elastic body, from getting settled. It is also possible to avoid the valve body and valve seat sticking together,
The valve body easily opens at the designed expiratory pressure at any time, and since the valve body does not deform even if it is pressed against the valve seat for a long period of time, if the valve body once abuts on the valve seat, Close contact does not cause leakage. Further, since the exhalation valve is always capped, it is possible to prevent the ingress of dust that impedes the close contact between the valve body and the valve seat. In addition, the expiratory valve of the present invention does not need a special opening plug because it also has a function of an opening plug when discharging the air filled in the jacket.

Furthermore, the expiratory valve of the present invention satisfies the requirements for life jackets, since various actions such as removing the cap, blowing the breath, and fitting the cap can be performed with one hand when the expiratory valve is used. It is a thing.

Furthermore, in the exhalation-injection valve of the present invention, the cap is made of an elastic body and is closely fitted to the air outlet, so that in addition to the air shut-off function of the valve body and the valve seat, this portion also has Has an air blocking function of about 100 mm / Hg,
Even if the check valve function is lost, it is generally 30 to 70 m.
It is effective in securing the internal pressure of the life jacket designed to have the internal pressure of m / Hg. As described above, the exhalation injection valve of the present invention always has a precise opening and closing ability, and
It is also useful for maintenance when the vest is stored, and it also serves as an effective and convenient opening stopper during inspection, and also has a double safety function to secure the internal pressure of the vest. The effect is extremely remarkable.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional front view of an exhalation inhalation valve with a cap attached thereto.

FIG. 2 is a plan view showing an outlet of an exhalation inhalation valve.

FIG. 3 is a front view of a cap showing a half body in cross section.

FIG. 4 is a vertical cross-sectional front view of the exhalation injection valve, showing a state in which the small diameter portion of the cap is inserted into the air outlet to keep the valve body open.

FIG. 5 is a front view showing a cross section of a half body of a conventional exhalation injection valve.

[Explanation of symbols]

 1 Housing 2 Valve Seat 3 Stem 4 Groove 5 Valve Body 6 Spring Bearing 7 Bearing 8 Air Hole 9 Outer Cylinder 10 Outlet 11 Coil Spring 12 Cap 13 Step 14 Air Reservoir 15 Rolelet 16 Small Diameter 17 Protrusion 18 Recessed Groove

Claims (1)

(57) [Scope of utility model registration request] 1. An exhalation injection valve housing is provided with an air reservoir for securing a desired amount of air from a top surface of a cap to be capped to the exhalation injection valve to a valve body inside the valve. The outer peripheral portion of the air outlet is made a smooth surface, and a cap made of a detachable elastic body is tightly attached to the air outlet and then slid toward the valve body to increase the air pressure stored in the air reservoir, An exhalation injection valve for an inflatable life jacket, wherein the valve body is brought into contact with a valve seat in a state where air pressure and a compressive load of a spring biased by the valve body are balanced.