JPH0131073B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a "grated hand" or a hose joint used for example in a tractor or trailer, and more specifically, the present invention relates to a "grated hand" or a hose joint used for example in a tractor or a trailer. The present invention relates to a hose coupling configuration having a built-in automatically opening debris plug.

[Prior Art] As is well known, a trailer is configured to carry cargo and the like and be towed by a tractor with a driver on board. The trailer and tractor can be separated as needed, so it is possible to leave the cargo loaded on the trailer at the destination, or to transport cargo of different shapes or properties, such as livestock or petroleum.
It is possible to transport the tractor as it is by changing only the trailer.

Considering that trailers are heavy themselves and may be loaded with heavy objects, they are generally equipped with brakes that act on the wheels of the trailer. Such brakes are configured to operate with air pressure higher than atmospheric pressure, and the operating air is generally stored in an air tank by a compressor attached to the tractor's engine, and then used for operation. The air is sent from the air tank via an air supply hose to the brakes of the tractor and trailer according to the needs of the person, and the brakes are actuated there.

When disconnecting the trailer from the tractor, it is also necessary to disconnect the air supply hose. Since a trailer and a tractor are often disconnected and reconnected, it is desirable that the disconnection or reconnection operation be simple. For the same reason, it is desirable that the operation of disconnecting and connecting the air supply hose be simple. Accordingly, a hose joint that can be easily disconnected and connected has been developed, and one example of such a hose joint is disclosed in US Pat. No. 3,245,428.

U.S. Pat. No. 3,245,428 describes a typical hose fitting (grated hand) construction.
The hose joint consists of a hollow thin disc-shaped member.
It has a hose attachment part at one end, and the hose attached thereto communicates with the inside of the disc-shaped member. Further, the disc-shaped member has an opening on one surface in the axial direction, and the opening communicates with the inside of the disc-shaped member. A seal member is provided around the opening, and a protrusion and a protrusion receiving portion are provided on the outside of the disc member.

Connecting and disconnecting air supply hoses on tractors and trailers is done by connecting and disconnecting hose joints that have similar shapes.
This can be done as follows.

It is assumed that a hose end for supplying air from the tractor is attached to one hose joint, and a hose end for supplying air to the trailer is attached to the other hose joint. Although either hose fitting may be fixedly attached to the tractor or trailer, at least one hose fitting must be freely movable.

The connection of the hose joints is completed by facing each other with their openings facing each other, pressing one seal member strongly against the other seal member, and simultaneously engaging each protrusion into the protrusion receiving portion of the other. After the hose joints are connected, even if air flows from the tractor air supply hose to the trailer air supply hose and the air pressure rises, the sealing members of the hose joints will adhere strongly to each other, resulting in an airtight structure. Because it is curved, air does not escape to the outside. The hose coupling is disconnected by simultaneously disengaging each projection from the mating projection receptacle.

[Problem to be Solved] Incidentally, when a conventional hose joint is cut off and opened to the atmosphere, dust and the like sometimes enter the hose joint. Dust that has entered the hose joint may reach the trailer's air-operated brake system, damaging the brake system's valves, diaphragms, pistons, etc., and necessitating disassembly and maintenance of the brake system. Therefore, it was necessary to thoroughly clean the hose joints before connecting them.

In order to solve such problems, for example, in the above-mentioned US Pat. No. 3,245,428, a membrane-like closing body is used to close the opening, and another example uses a closing plate equipped with a spring. Or,
It was designed to prevent dust etc. from entering. However, all of these conventional structures have problems in terms of effectiveness and handling, and have not yet been able to provide a satisfactory structure.

An object of the present invention is to provide a hose joint that has a simple structure but has a high dustproof effect.

[Means for Solving the Problems] A hose joint according to the present invention is a hose joint incorporating a dust plug that automatically opens, and includes a hose joint body 10, a chamber 28 in the body 10, and a chamber 28 in the body 10. an air outlet 20 communicating with the air outlet 28 and a seal 22 disposed in the air outlet 20 and directed toward and away from the seal 22 within the chamber 28 to close and open the air outlet 20; a movable elongated cylindrical debris plug 38 having a protrusion at one end adapted to penetrate the seal 22 in the closed outlet position; a spring 46 disposed coaxially with the plug 38 to urge the plug 38 toward a closed position with the seal 22;
and a diverter valve 16 disposed between the plug 38 and the chamber 28, the plug 38 having a surface 50 extending circumferentially adjacent the other end of the plug 38 and communicating with the inlet 12. , the hose fitting further comprises a collar 34 having a cylindrical extension 36 mounted for reciprocating the plug 38 within the chamber 28 and a peripherally extending face 50 of the plug and the collar 34 . the space 52 between and the space 5
2 and air passage means 54 in said collar 34 connecting said plug face 50 with said switching valve 16, said air inlet 12 being connected to said passage means 54 when said switching valve 16 is open. It is characterized in that it is connected to a face 50 of the plug to provide air pressure to the face 50 to move the plug 38 away from the seal 22 and into an open position against the force of a spring 46.

[Function] Since the hose joint of the present invention has the above-described configuration, even if the dust prevention plug is normally urged to the closed position by the spring force inside the hose joint, the hose joint inlet is closed. When air pressure is applied to the dirt plug, the dirt plug is automatically opened by applying air pressure to said surface and moving said plug away from said seal and into an open position against the force of a spring. It's getting old.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention solves the problem of dirt in pneumatic equipment by providing a built-in protective plug. The debris plug of FIG. 1 is opened by air applied to the inlet 12 because this air is directed through the passageway 54 into the small cavity 52. The air pressure in this cavity will thereby displace the protrusion of the plug from the air outlet 22 and push the debris plug toward the open position. The air within the cavity 52 exerts pressure against the flange 48 of the debris plug, causing the plug to open against the force of the spring 46.

Hereinafter, embodiments of the hose joint according to the present invention will be described in detail with reference to the drawings. In addition, although only a part of the configuration of the hose joint is shown in the drawing,
It is well known to those skilled in the art that a complete hose coupling configuration may require additional configurations such as attachments. However, for ease of understanding, only a portion of the hose coupling will be shown and described.

As shown in FIG. 1, the main body 10 of the hose coupling has an air inlet 12 which communicates via a passage 14 with a switching valve 16. Diverter valve 16 has a stem and handle (not shown) that extends out from the body or housing 10 of the hose fitting. The switching valve 16 is in the first position from the open position shown in FIG.
The valve can be rotated to a closed position such that the inner passage 18 of the valve forms an angle of 90 degrees with respect to the position shown. Body of hose joint 1
0 has an air outlet hole 20, which is closed by a sealing member 22, which is conventionally known in the construction of a hose coupling. The sealing member 22 has a circumferential groove 24 defining a flange portion that fits tightly on both sides of the flange 26 of the body of the hose coupling to ensure a seal within the air outlet hole 20.

A chamber 28 is provided within the body 10 of the hose coupling, which communicates with the switching valve 16 by an air outlet hole 20 and a short air passage 30.

Disposed within the chamber 28 on the shoulder 32 is a collar 34 having an outwardly extending flange seated on the shoulder and a coaxial guide portion 36 carrying a dirt plug 38. Plug 38 is coaxially aligned with opening 40 in seal 22, although in FIG.
8 is in the closed position closing the opening 40 in the seal.
The debris plug 38 has a shoulder 42 which, in the closed position, covers the opening 40 of the seal.
It sits on a part of the seal 22 around the entire circumference and provides a closed state.

The dust plug 38 is attached to the main body 10 of the hose joint.
It has an internal chamber 44 in which a coil spring 46 is fixed, the bottom of which rests on a portion of the spring. A coil spring 46 urges the debris plug to the closed position shown in FIG. The debris plug 38 further has an outwardly extending annular flange 48 defining a surface 50 spaced from the lower surface of the collar 34. A chamber 52 is formed between the collar 34 and the surface 50, and this chamber 52 is connected to a plurality of passages 5 in the collar.
4 communicates with the chamber 28 and thus with the air channel 30 and the air outlet channel 40. The flange 48 of the dust plug 38 has a seal 56 facing the side of the chamber 52 and another seal 58 facing the guide portion 36 of the collar 32. Similarly, the outwardly extending flange of collar 34 has a seal 60 against the side of chamber 28. The ring or ring analog 62 is in the chamber 28
and retains the collar 34. The indicator rod 61 is attached to the plug 38 and extends outward from the opening 33 of the main body when the switching valve is opened.

In operation, air flows from the air inlet 12 through the open switching valve 16 and then through the passageway 30 into the chamber 28. When the switching valve 16 changes from the closed position to the open position, air pressure entering the chamber 28 flows through the passage 54.
and enters the chamber 52 between the flange 48 and the collar 34 of the dirt plug. When the hose fitting is in its normally closed position, the debris plug is in the position of FIG. 1, closing the central passageway 40 of the seal 22. However, when the diverter valve 16 is opened, air pressure from the inlet enters the chamber 52, as described above, and applies an air pressure-generated force to the face 50 of the debris plug. This causes the dust plug to move against the biasing force of the spring 46, and the seal 2
away from the central passage 40 of 2. Thus, when the switching valve 16 is opened, the dust plug is automatically retracted from the closed position with the seal 22.

When the diverter valve 16 is closed and no air pressure is applied through the hose fitting, the spring 46 forces the debris plug back into the closed position of FIG. Room 5
Air pressure within 2 is vented through passage 54 into chamber 28 and then out through passage 40 of the seal. Closing of the diverter valves is accomplished at a rate such that the air pressure in each chamber 52 and 28 can be vented so that the spring can move the debris plug to the closed position.

Debris plugs are necessary and effective in keeping impurities in the supply air, such as insects, dirt, and other miscellaneous materials, from entering the valves located downstream of the hose fittings. Thus, the air system in the tractor-trailer combination is protected by a debris plug that automatically closes when the supply air through the hose fitting is interrupted.

Although a preferred form of the invention has been shown, many other changes and modifications will be apparent to those skilled in the art.

[Effect of the invention] In the hose joint of the present invention, the dust prevention plug is
Although normally biased toward the closed position by the spring force within the hose fitting, when air pressure is applied to the hose fitting inlet, air pressure is applied to said surfaces, causing said plug to resist the spring force and sealing said seal. By moving the plug away from the dust plug to the open position, the dust plug automatically opens.

[Brief explanation of drawings]

FIG. 1 is an axial cross-sectional view of a hose joint showing one embodiment of the present invention. [Explanation of symbols of main parts], 10...Main body, 1
2... Air inlet, 14... Passage, 16... Switching valve, 22... Seal member, 26... Flange, 2
0... Air outlet hole, 28... Chamber, 34... Collar, 38... Dust prevention plug, 50... Plug surface, 52... Chamber, 46... Coil spring, 54...
…A passage of color.

Claims (1)

[Claims] 1 A hose joint incorporating a dust plug that automatically opens, which is arranged in the hose joint body 10, a chamber 28 in the body 10, an air outlet 20 communicating with the chamber 28, and the air outlet 20. an elongated cylindrical debris plug 38 movable within the chamber 28 toward and away from the seal 22 to close and open the air outlet 20; a plug 38 having a protrusion at one end adapted to penetrate said seal 22 in the outlet closed position;
a spring 46 disposed within the chamber 28 and coaxial with the plug 38 to urge the plug 38 toward a closed position with the seal 22; 1
2 and a switching valve 16 disposed between the chamber 28 and the plug 38 having a surface 50 extending circumferentially adjacent the other end of the plug 38 and communicating with the inlet 12. The hose fitting further includes a collar 34 having a cylindrical extension 36 mounted for reciprocating the plug 38 within the chamber 28 and a circumferential plug surface 50.
and said collar 34, and air passage means 54 in said collar 34 connecting said cavity 52 and said face 50 of said plug with said switching valve 16, said switching valve 16 When open, the air inlet 12 is connected to the passage means 54 and to a face 50 of the plug, providing air pressure to the face 50 to move the plug 38 away from the seal 22 against the force of a spring 46. A hose joint incorporating a dust plug that automatically opens and moves to an open position.