JPS63135691A - Pipe body connector for suction - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a vacuum molding method called the V process, in which a suction hose (hereinafter referred to as a pipe body) is attached to a metal frame in order to reduce the pressure inside the metal frame. ``This relates to a joint for removing the device.

[Prior art] Conventionally, there is a ball lock type connector for attaching and detaching pipe bodies, which consists of a socket (female) and a plug (male).
It consists of The socket has a ball and a sleeve that holds it in place, and also has a sealing function to prevent leakage during connection, and is equipped with a valve that automatically opens and closes when the connection is made. When the socket valve is alone, it is held tightly against the valve seat by the force of the spring.

The plug has a ball groove on its outer circumferential surface, and is fixed and connected by inserting the plug into the socket while keeping the sleeve pulled, and fitting the ball into the ball groove of the plug. When connected, the valve is fully open, creating an annular channel between the main body and the valve, allowing fluid to flow. To disconnect, pull the socket sleeve and pull the socket from the plug, and the socket valve will automatically close and no fluid will flow out.

Next, the lever lock type has a lever that locks when connected to the socket, and a gasket for sealing.
A groove is provided on the outer circumferential surface of the plug to accommodate the cam mechanism of the lever. Lift the lever towards the plug insertion side,
Insert the plug until it stops and pull down the lever to complete the connection. When connecting, you can always pull up the lever to separate the plug and socket.

[Problems that R-Ming is trying to solve] When the above ball-lock type tube connector is used at a casting site, the ball part malfunctions due to the adhesion of generated powder, ie, sand, etc., so it must be used every time. There was a problem that cleaning was required.

In addition, although the lever-lock type tube connector has a longer service life than the ball-lock type, sand gets caught in the joint and causes malfunction.

Both the ball lock method and the lever lock method require a seal to prevent sand and debris, and an air purge to remove sand and debris requires a means to prevent the generation of powder. Furthermore, these systems have complicated structures.

In the reduced pressure molding method, vacuum suction is applied when connecting to the metal frame, and the tube connector is required to be connected to the metal frame to reliably maintain a vacuum state.

An object of the present invention is to provide a suction pipe connector having a simple structure and high reliability, which has a function of self-cleaning the area around the plug and the inside of the socket by the flow of air suctioned during the joining operation with the plug. There is a particular thing.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a valve body which is movable by a biased spring force inside the socket, and has a valve body which is movable within the tip of the socket. A movable sliding body is connected, and the sliding body has a hole that communicates with a through hole at the tip of the plug that connects with the socket, and a plurality of holes that communicate with the hole at the end of the socket body side. A gap is provided between the parallel outer circumference of the sliding body and the inner circumferential surface of the tip of the socket to allow the flow of powder, and a first O-ring and a second O-ring are installed inside the socket. However, when the valve body is opened, the first O-ring comes into contact with the valve body, and when the valve body is opened, the second O-ring comes into contact with the valve body.
The ring contacts the slope of the sliding body to form a flow path inside the socket that communicates with a plurality of holes provided on the main body side of the socket of the active body and an outlet provided on the socket main body. This is a suction tube connector.

[Function] When the socket is not connected to the plug, the valve body built into the socket contacts and seals the first O-ring fitted inside the socket due to the biased spring force.

When the socket and plug are connected, the slope of the sliding body connected to the valve body contacts and seals the second O-ring fitted inside the socket, and at this time the spring is compressed and the valve body opens. A flow path is formed that communicates with the inside of the plug, the inside of the sliding body, the plurality of holes provided at the end of the active body, and the outlet of the socket body, so that suction and pressure can be evacuated from the outlet.

During the process of joining the plug and socket, powder particles, such as sand, adhering to the area around the plug and in the gaps between the sliding parts of the socket are drawn into the sucked air and pass through the gaps in the sliding parts. Therefore, it can be automatically removed and cleaned.

[Example 1 Embodiments of the present invention will be described below based on the drawings.

FIG. 2 is an explanatory diagram of the reduced pressure molding method.

As shown in FIG. 2, a model 18 is placed on top of the suction box 17.
are arranged, and a film-like shielding member 1 is placed on the surface of the model 18.
9 is placed and made plastic with a heating device. Next, the interior of the suction box 17 is depressurized by suction and exhaust in the direction of the arrow from the vent hole 20, and the plastic film-like shielding member 19 is brought into close contact with the model 18 through the vent hole 20. Furthermore, a coating material layer 21 is formed on the surface of the shielding member 19. Next, the metal frame 15 is placed on the suction box 17, filled with mold-forming refractory material particles 22, vibration is applied, and another film-shaped shielding member 23 is placed on the top. Suction 016
A mold is formed by applying suction in the direction of arrow B and tightening the portion filled with refractory material particles 22 under reduced pressure. and,
Furthermore, compressed air is sent into the suction box 17 from the ventilation hole 20 and pressurized, thereby separating and removing the shielding member 19 that is in close contact with the model 18, thereby obtaining a mold.

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention.

In FIG. 1, a plug (male) 1 having a through hole 1b in a cylindrical tip 1a is a suction port 16 of a metal frame 15 shown in FIG.
installed on. Inside the suction port 16 is a butterfly valve (
(not shown) and is normally in a closed state. A cylindrical socket member 4 is attached with bolts 5 to the front end of a socket main body 3 having an outlet 3a at the bottom to form a socket (female) 2. A spring 9 is provided in a space surrounded by an inner surface 8b of the valve body 8 having an inclined surface 8a and a protruding surface 3b inside the socket body 3. Two grooves are provided inside the socket member 4, into which O-rings 10 and 11 are fitted respectively.

The valve body 8 is pushed forward by the (=J force) of the spring 9, and the slope 8a comes into contact with the O-ring 10, and is normally in a sealed state.

The sliding body 12 has a hole 12a that communicates with the through hole 1b of the tip end 1a of the plug 1, and is slidably inserted into the parallel outer circumferential part 12b with a gap δ from the inner circumferential surface 4a of the socket part vi4. It also has a sloped part 12c parallel to the sloped part 4b of the socket member 4, and further has an end i on the socket main body side.
The outer diameter of the socket member 2d is smaller than the inner diameter of the parallel inner surface portion 4C of the socket member 4 by providing a gap δ or more. Said end 12
Four round holes 12e are provided in d, and the round holes 12e communicate with the holes 12a, and a plate 12f on the tip side thereof is connected to the valve body 8 with bolts 13.

A groove is provided inside the open side of the sliding body 12, into which a ring-shaped rubber 14 having the same inner diameter as the hole 12a is fitted.

In order to join the plug 1 and the socket 2, the socket 2 may be moved forward by driving a cylinder (not shown) attached to the end surface 6 of the socket 2, for example. When the socket 2 is moved forward, the tip 1a of the plug 1 comes into contact with the rubber 14, and then the spring 9 is compressed, and the active body 12 connected to the valve body 8 slides inside the socket member 4, and the slope part 12C
contacts the O-ring 11 and is sealed. Then, the cylinder drive is stopped.

At this time, the slope 'B a of the valve body 8 is separated from the O-ring 10, and a flow path is formed between the four round holes 12e provided in the outer peripheral portion 12d of the tip end of the sliding body 12 and the inside of the socket 2.

The outlet 3a of the socket body 3 is connected to a vacuum pump via a tube and is constantly depressurized, so when the valve body 8 opens, the flow path is connected to the outlet 3a and the suction port of the metal frame 15 is opened. A butterfly valve provided in the metal frame 16 opens, and the air inside the metal frame 15 is sucked and the pressure is reduced.

In order to separate the plug 1 and the socket 2, it is sufficient to drive the cylinder to move the socket 2 backward.At this time, the restoring force of the spring 9 closes the valve body 8, and the active body 12 connected to the valve body 8 closes. moves forward inside the socket member 4 and returns to its original position.

In the process of joining the plug 1 and the socket 2, there is a gap δ between the inner circumferential surface 4a of the socket member 4 and the outer circumferential parallel part 12b of the N moving body 12, and there is always a gap δ between the inner circumferential surface 4a of the socket member 4 and the outer circumferential parallel part 12b of the N moving body 12. Since the pressure is reduced, if the gap δ is shifted to a size that allows granular materials such as sand to flow, for example, Q, 3 mm, the sand attached around the plug and on the surface of the sliding body 12 will be removed from the gap δ from the atmosphere. It passes through and is sucked into the outlet 3a.

[Effects of the Invention] As explained above, according to the present invention, dust such as sand adhering to the surface of the N moving body slidably inserted around the plug and inside the socket can be automatically removed.・Since it has a cleaning function, it can prevent wear of the sliding surface and O-ring due to sand, and the cylinder drive ensures that the plug and socket are connected, so they do not come off during suction, and the built-in valve The O-ring contacts the body and the sliding body, ensuring a secure seal when the socket is used alone or when connected, and the structure is simple and reliability is improved, which is of great industrial value.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a vacuum molding method. DESCRIPTION OF SYMBOLS 1...Plug, 1a...Tip part, 1b...Page hole, 2...Socket, 3...Socket body, 4...
Socket member, 4a...inner peripheral surface, 8...valve body, 8a
...Slope, 9...Spring, 10.11...O
Ring, 12...Sliding body, 12a...Hole, 12b...
... Parallel outer circumference part, 12c... Slope part, 12d... End on the socket body side, 12e... Round hole. Figure 2

Claims (1)

[Claims] A valve body movable by an applied spring force is provided inside the socket, and a sliding body that can slide within the tip of the socket is connected to the valve body, and the sliding body is connected to the tip of the plug that connects with the socket. has a hole that communicates with the through hole of the
A plurality of holes are provided at the end of the socket body side that communicate with the holes, and a gap is provided between the parallel outer circumferential portion of the sliding body and the inner circumferential surface of the tip of the socket, through which the powder or granular material can flow; A first O-ring and a second O-ring are fitted inside the socket, and when the valve body is closed, the first O-ring is in contact with the valve body, and when the valve body is open, the second O-ring is in contact with the sliding body. A suction pipe joint characterized in that a flow path is formed inside the socket that contacts the slope portion of the socket and communicates with a plurality of holes provided on the socket body side of the sliding body and an outlet provided in the socket body. Ingredients.