JPH0334526Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to an intake and exhaust valve for rubber boats with a safety valve function.

(Background of the idea) The air body of conventional rubber boats is equipped with intake and exhaust valves. This consists of an air inlet body equipped with a check valve that is screwed onto a cap that is fixed to the air cylinder, and when the air cylinder is inflated, air is filled from the cap and the same air is inflated. When deflating the barrel, the cap is removed and air is vented through the mounting port.

However, even when the air cylinder of the rubber boat is filled to a predetermined pressure, there is a risk that the internal pressure of the air cylinder will rise due to a rise in outside temperature, resulting in an overpressure state.

In order to prevent this, it is possible to solve this problem by installing a safety valve in the air cylinder that opens at a predetermined pressure, and allowing the air inside the air cylinder to escape to the outside when the air cylinder becomes overfilled. It is difficult to check the operation of the safety valve installed at a different position on the air cylinder while filling air from the intake and exhaust valves, and it also requires a cap to attach the safety valve to the air cylinder and a rubber collar to support the cap. other,
There is a problem in that it requires more work to attach them to the air cylinder.

The purpose of this invention is to solve the problem of installing a safety valve in the air body of a rubber boat.

(Technical issue) The above-mentioned problem of confirming the operation of the safety valve in the event of overfilling is due to the fact that the safety valve is installed separately from the intake and exhaust valves, so that the worker performing the filling operation is made aware of the operation of the safety valve. This problem arose because there were almost no functions.

The technical problems of the present invention are to make it easy for the worker performing the inflation work to sense the operation of the safety valve, reduce the attachment process and necessary parts when installing the safety valve, and to eliminate the air in the gas cylinder. The goal is to shorten the time required.

(Technical means for solving the problem) The technical means taken by the present invention to solve the above-mentioned problem is to provide a valve seat with an air inlet/outlet that communicates the inside of the air cylinder with the outside, and a valve seat of this valve seat. A rotary valve body is supported on the outside of the air cylinder so as to be rotatable and movable back and forth, and is seated on the valve seat by the elastic force of a counter-pressure spring, and a predetermined valve body is provided on the seating surface of the rotary valve body. An inlet hole is provided that matches the air inlet and outlet of the valve seat at the rotating position, and a plug member provided with a check valve is removably attached to the outer side of the air cylinder of the rotating valve body. .

(Function) The rotating valve body is seated so that it can rotate and move back and forth while being pressed by a predetermined force against the valve seat on the outside of the air cylinder by an anti-pressure spring, and opens when the pressure inside the air cylinder exceeds a predetermined pressure. The air inside the air cylinder is exhausted to the outside. Further, a stopper member provided with a check valve is detachably attached to the secondary side of the rotary valve body, and the check valve prevents the backflow of air that has passed through the rotary valve body, and prevents the air from flowing back when air is vented. Then, the plug member is removed from the rotary valve body, and the air in the gas cylinder is discharged without resistance.

When air is taken in and air is vented, the rotary valve body is rotated to a predetermined position so that the air inlet/outlet of the valve seat and the inlet hole of the rotary valve body seating surface are aligned to form a penetrating state. As a result, during intake, the air that has passed through the check valve flows into the air cylinder through the passage, and when air is vented, the air in the air cylinder flows back through the passage, and the check valve closes. The removed rotary valve body is pulled out from inside.

(Effects) As described above, in this invention, a plug member equipped with a check valve that serves as an intake inlet is provided on the secondary side of the rotary valve body of the safety valve, so that the operator can contact the air supply pump. If the safety valve rotates while the end of the hose is connected to the above-mentioned intake port and the valve is being charged, you will be able to feel its operation (filling is complete), making the filling process extremely smooth. Further, when air is removed, the air inside the air cylinder can be removed in a short time without any resistance by removing the plug member.

Furthermore, since the safety valve does not have to be attached separately from the air intake port, the process of attaching the safety valve and the number of members overlapping with the intake port member can be reduced.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

Reference numeral A in FIG. 1 indicates an intake and exhaust valve attached to the air cylinder 6, which is embedded and fixed in the skin of the air cylinder 6 via a rubber collar 5. This intake and exhaust valve A
consists of a safety valve part a and an intake port part b which is detachably provided in a rotary valve body 2 which is a valve body of the safety valve part a.

The valve seat 1 of the safety valve part a also serves as the valve seat of the main intake valve A itself, and is formed into a circular plane shape and is fixed to the bottom of the rubber collar 5 described above while maintaining an airtight joint surface.

The seat surface 1b of the valve seat 1 on which the rotary valve body 2 is seated is provided on the external side of the air cylinder 6 of the valve seat 1, and a recessed portion is formed in the center of the external side of the valve seat 1, and a recessed portion is formed on the bottom side of the portion. It is provided so as to be inclined conically from the end periphery toward the inside of the air cylinder, and has four air inlet/outlet ports 1a that communicate the inside of the air cylinder 6 with the outside. Also, the same seating surface 1
b A guide shaft 7 into which the rotary valve body 2 is fitted and held is provided in the center so as to protrude toward the outside of the air cylinder 6.

The rotary valve body 2 is formed into a substantially cylindrical shape, and has a seating surface 2b at one end that is seated in close contact with the seating surface 1b. An entry hole 2a is provided, a fitting hole 2c for fitting the guide shaft is formed in the center thereof, and a grip portion 2d is provided on the outer peripheral surface of the other end.

To attach the rotary valve body 2 to the valve seat 1, the rotary valve body 2 is fitted onto the guide shaft 7 of the valve seat 1 and seated on the seat surface 1b, and then a counter pressure spring 4 with a predetermined spring force is
is fitted onto the guide shaft 7, compressed and attached with a bolt 8 passing through the guide shaft 7, and the rotary valve body 2 is pressed against the seat surface 1b with a predetermined pressure.

As a result, the rotary valve body 2 is moved by the anti-pressure spring 4.
It is held by the guide shaft 7 while being subjected to a pressing force, and can freely move forward and backward and rotate.

Therefore, under normal conditions, the air inlet/outlet 1 of the valve seat 1
a is closed by the seating surface 2b of the rotary valve body 2, and the gasket 9 attached to the back surface of the grip portion 2d is brought into close contact with the rim of the concave portion of the valve seat 2, so that the air inside the air cylinder 6 flows out to the outside. This completely prevents

The plug member 10 having the check valve 3 is removably screwed into the opening of the grip portion 2d on the downstream side of the rotary valve body 22 in the above state.

The plug member 10 is a cylindrical body with a threaded portion on the outer periphery, and has an inlet port 11 at one end, a check valve seat 3a at the other end, and a rubber check valve body seated on the valve seat 3a. 3b, and a gripping portion 3c similar to the gripping portion 2d of the rotating valve body 2.
It is held and screwed into the rotary valve body 2 in a detachable manner. This plug member 10 is removed from the rotary valve body 2 when air is vented, so be careful not to lose it.
are connected by a connecting ring 12.

Next, the operating conditions during intake/exhaust and air removal will be explained.

When filling the air cylinder 6 with air, the suction hole 2a of the rotary valve body 2 is aligned with the air inlet/outlet port 1a of the valve seat 1, and air from the air supply pump is blown into the suction port 11. Figure 3). When the pressure inside the expanded air cylinder 6 reaches a predetermined pressure, the rotary valve body 2 opens with the pressure inside the air cylinder, and at this time, a gap is created between the seating surface 1b and the seating surface 2b, and the air is removed. Excess air within the shell 6 is released to the outside through this gap.

When the rotary valve body 2 opens, its movement
It was conveyed to the worker's hand as a response to 1.
The operator can sense the operation of the rotary valve body 2 and confirm the completion of filling.

After filling, the rotary valve body 2 is rotated to close the air inlet/outlet 1a (FIG. 1).

When the pressure inside the air cylinder 6 rises above a predetermined pressure due to a rise in the temperature of the outside air, etc., the rotary valve body 2 is opened by the pressure inside the air cylinder 6, and the excess air is exhausted to the outside. (Figure 5). Therefore, the pressure inside the air cylinder 6 is maintained at a predetermined pressure, and due to overfilling, the air cylinder 6 is
There is no burden on the person.

When venting air, the plug member 10 is removed from the rotary valve body 2, and the rotary valve body 2 is further rotated to align the air inlet 2a with the air inlet/outlet 1a, thereby rotating the air in the air cylinder 6. It flows out through the inside of the valve body 2 (Fig. 6).

When the plug member 10 is removed, the air in the air cylinder 6 is discharged from the air inlet 2a and the air inlet/outlet 1a without resistance, and air removal can be completed in a short time.

The spring force of the anti-pressure spring 4 described above is changed in accordance with the set pressure inside the air cylinder 6. Further, if each member of the intake/exhaust valve A is made of synthetic resin, it is light and does not rust, making it suitable for use in rubber boats.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional view of an intake and exhaust valve embodying the present invention, Figure 2 is a partially cutaway plan view of Figure 1, Figure 3 is a longitudinal sectional view of the intake and exhaust valve in the intake state, and Figure 4 is a longitudinal sectional view of the intake and exhaust valve in the intake state. FIG. 3 is a partially cutaway plan view, FIG. 5 is a vertical cross-sectional view of the intake and exhaust valves in the exhaust state, and FIG. 6 is a vertical cross-sectional view of the intake and exhaust valves in the air vent state. In the figure, A: intake and exhaust valve, a: safety valve section, b:
Inlet port, 1: valve seat, 1a: air inlet/outlet, 2: rotating valve body, 2a: blow-in hole, 3: check valve, 4: anti-pressure spring, 6: air cylinder, 10: plug member.

Claims (1)

[Scope of utility model registration request] A valve seat has an air inlet/outlet that communicates the inside and outside of the air cylinder, and the valve seat is supported on the outside side of the air cylinder so that it can rotate and move forward and backward, and is supported against the valve seat by the elastic force of an anti-pressure spring. , a rotary valve body that is seated, and an air inlet hole that matches the air inlet and outlet of the valve seat at a predetermined rotational position is provided on the seating surface of the rotary valve body, and an air inlet of the rotary valve body is provided. An intake and exhaust valve for rubber boats that has a plug member with a check valve installed on the outside of the hull that can be attached and removed.