FR2557256A1 - CONNECTING UNIT - Google Patents

Abstract

THE INVENTION RELATES TO COMPRESSED AIR CONNECTIONS. THE FITTING ACCORDING TO THE INVENTION INCLUDES A SLEEVE 4 FORMING THE FEMALE HALF-FITTING, WHICH BLOCKED IN A HOLE 2 OF THE COMPRESSED AIR DISTRIBUTOR 1, FOR EXAMPLE BY FLANGES 6 AND WHICH CLOSES HOLE 2 BY MEANS OF TWO LIPS D 'WATERPROOFING 8 THAT APPLY TO ONE TO THE OTHER. THIS SLEEVE HAS A CONNECTING ORIFICE 12 COMPLETED BY AN INTERNAL FLANGE 13 WITH A DISSYMETRIC PROFILE, IN WHICH THE CONDUIT 16 TO BE CONNECTED IS INSERTED. BY INSERTING THE DUCT 16 DEEP ENOUGH IN THE SOCKET 4, THE LIPS 8 ARE SPREADED TO ESTABLISH COMMUNICATION. THE INTERNAL FLANGE 13 BITS INTO THE DUCT TO PREVENT IT FROM TAKING OUT. MAIN APPLICATION: COMPRESSED AIR SUPPLY FOR SEVERAL USER APPLIANCES TO BE CONNECTED TO A SAME DISPENSER.

Description

CONNECTING UNIT

  The invention relates to a connection unit

  intended to establish a connection to fit between a distribution

  compressed air supply and a pipe to be connected.

  In the prior art, connection units for compressed air lines are known which are made in the form of push-fit connectors. They are composed of at least two parts, namely a socket and a male end that is pushed into the socket to establish a connection. The construction of the socket and that

  of the tip are relatively complicated. It is necessary

  to provide special seals to form a seal between the bit and socket in the assembled condition and a fastening device is needed by which the bit is attached to

  connected. As a result, the connections to

  already known have a complicated construction, in several parts, which leads to high cost prices

in manufacturing.

  It is also known to equip fitting fittings with a check valve function, so that the compressed air line closes when the nozzle is removed from the socket. For this purpose, a non-return valve provided with a movable element constituting a separate part is integrated in the fitting fitting. The mounting of such a check valve results in a number of parts

  even larger parts and a corresponding increase

  respondent to the manufacturing and assembly expense of the

fitting fitting.

  The object of the invention is to remedy these problems.

  convenients and realize a connection unit to

  check valve function for compressed air ducts

  award winning design which is considerably simplified, which can be manufactured at a cost price

  advantageous and universally usable.

  According to the invention, this problem is solved by a connection unit characterized in that it comprises a connection socket which can be fixed to an opening of the compressed air distributor and which closes this opening by means of sealing lips. resiliently compressing against each other forming a seal, said sleeve having a fitting hole in which the pipe can be depressed by removing the sealing lips. We connect the pipe to connect

  in this connection socket; the lips of

  gap then deviate and apply to tight seal

  against driving. This establishes the communication of

  desired air. When removing the conduct of the

  connecting sleeve, the sealing lips are

  close, and the supply of compressed air is inter-

  broken. The device according to the invention makes it possible to use the pipe to be connected itself as a bit or half-male coupling that is introduced into the socket

  connection. It is not necessary to provide an

  end or half-male special connector, which represents a considerable simplification of the fitting. The connecting sleeve according to the invention is in one piece and it can be manufactured with a low cost, for example rubber or plastic material. Its elastic sealing lips represent a shutter member having a check valve function which, at the same time, seal the connection orifice of the air distributor

  compressed and seal the connecting pipe

  der. This dual function is achieved in a form of

  one-piece construction with the connecting sleeve

  which also brings the advantage of extremely low cost prices. The connection unit according to the invention can finally be mounted in a simple manner on all compressed air distributors, pressure tanks and compressed air tubes possible, which opens up possibilities.

universal application.

  According to another embodiment of the invention, the connecting sleeve has a substantially cylindrical tubular body whose one axial end is open and whose other end can be closed by sealing lips integrally on its periphery and

  which meet on the central axis.

  This embodiment provides the connection sleeve with excellent sealing behavior, while at the same time it is possible to admit a wide range of fluctuations in the operating pressure in the compressed air distributor. Moreover, the pipe to be connected is guided conveniently at the moment

of fitting.

  According to other features of the invention, the sealing lips are curved with a concave shape, the device comprises a symmetrical set of two to

  six sealing lips and the surfaces of the labia-

  which come to bear against each other

  and / or staircase to form a labyrinth seal.

  All these characteristics further accentuate the effect of

  fairness of the connection socket.

  According to other embodiments of the invention, the connecting sleeve can be snapped into the opening of the compressed air dispenser, for example by means of one or more flanges (s) which are formed on the tubular body and form radial projections and the connecting sleeve can be fixed in the manner of a plug at the end of a closing tube

a compressed air line.

  These embodiments are of a particularly convenient mounting technique and are suitable

  for a large number of application cases.

  According to another embodiment of the invention,

  it is provided on the side wall of the plug hole

  retaining means, for example, in the form of

  denture formed on the workpiece, and which retain the

  duite fitted by preventing it from tearing itself apart.

  This embodiment makes it possible to obtain, by an extremely simple method of construction, a self-locking fastening of a connected pipe, which is thus protected from

  involuntary tearing. This device is particularly

  advantageous for the usual connection of

compressed air users.

  Other advantages of the invention will emerge from

  the following description of two exemplary embodiments

  given with reference to the attached schematic drawing in which: Figure 1 is a sectional view along I-I of Figure 2 of a first embodiment of the connection unit according to the invention;

  Figure 2 is a top view of the feed unit.

  rope taken in direction II of Figure 1; FIG. 3 is a view from above corresponding to FIG. 2 and showing a second exemplary embodiment

  of the connection unit according to the invention.

  Figure 1 schematically shows a distribution

  compressed air scorer (1), for example in the form of a distributor rail, a pressure tank or a tube constituting a compressed air line. The

  compressed air distributor (1) represents a casing

  conch connected to a source of compressed air and which is intended to supply one or more apparatus (s) user (s) of compressed air. The invention provides for this purpose

  connect a line (16) leading to the device

  corresponding compressed air generator, to the compressed air distributor (1) by a fitting assembly. Dots

  corresponding connections are formed by

  fices (2) formed in a wall (3) of the compressed air distributor (1) The orifice (2) shown in FIG.

  a circular section. It receives a connection socket

  4) which is fitted into the opening (2) by its cylindrical bushing body (5) with a circular base. On the bushing body (5) are formed two flanges (6) which

  protrude radially outwards and whose spread

  mutual axial dimension corresponds to the thickness of the wall (3).

  The connecting sleeve (4) is composed of a material

  elastic, for example rubber or plastic.

  It fits and snaps into the opening (2) by means of its flanges (6) forming a connection

  operating by safety of form and, at the same time,

  firmly against the wall (3) of the air distributor

  compressed under the effect of its internal elasticity.

  In this mounting position, the coupling sleeve

  cord (4) is engaged in the interior volume (7) of the

  compressed air distributor (1) for part of its length.

  This part of the connecting sleeve (4) forms a number of sealing lips (8) which seal the orifice (2). The sealing lips (8) came from a

  single piece on the periphery of the socket body (5).

  They extend radially from the outside towards the inside and meet at a certain distance from the wall (3) on the median axis (9) of the connecting sleeve (4). The sealing lips (8) are applied against one

  the other by a large area in the region of the axis.

  Their contact zone (10) constitutes a surface of

  chéité. In particular, the parts of the sealing lips (8) which come into contact with each other have a smooth surface: however, it is also possible to

  give the corresponding surfaces a configuration den-

  and / or staircase to form a kind of labyrinth seal. The sealing lips (8) are resiliently applied against one another in their sealing contact position, so that the orifice (2) in the wall (3) of the compressed air distributor ( 1) is

normally closed.

  In the exemplary embodiment shown, the sealing lips (8) are concave, that is to say that they are curved radially from the outside towards the inside. They thus provide a curved etching surface (11) at the operating pressure prevailing in the internal volume (7) of the compressed air distributor (1). At the time of commissioning of the pressure supply, there is an overpressure on the driving surfaces (11) and the sealing lips (8) are pressed radially inwardly undergoing elastic deformation . The lips (8) are dimensioned so as to maintain their sealing position in this situation; in particular, they are rigid enough not to risk turning around. Under the effect of the concave configuration of the lips (8), the pneumatic operating pressure exerts a force which presses the lips (8) against each other and which determines or strengthens

their mutual sealing.

  In the exemplary embodiment according to FIGS. 1 and 2, two sealing lips are provided which join together.

  in a median longitudinal plane of the

  cord (4). However, according to Figure 3, it is also

  it is possible to provide a larger number of sealing lips (8). In this case, the segment of the socket

  connecting piece (4) which protrudes into the internal volume

  inner (7) of the compressed air distributor (1) is divided into a star from the central axis (9). It is advantageous to choose a symmetrical arrangement in which the lips (8) extend over sectors or arcs of

  equal circumference of the connecting sleeve (4).

  In the exemplary embodiment according to FIG. 3, three sealing lips (8) are provided; however, it is still possible to envisage a larger number of lips (8) for example up to six lips. As in the first exemplary embodiment, the sealing lips (8) are curved with a concave shape and suitable for

  move radially outward.

  The sleeve-shaped body (5) of the connecting sleeve (4) has an axial fitting hole

  (12) in which a pipe to be connected can be driven.

  The fitting orifice (12) has a circular section

  and it is suitable for receiving a cylindrical

  drique or a pipe. This pipe (16) to be connected itself forms the male end or half-male connector of the fitting connection according to the invention. When pushed into the fitting hole, this pipe meets

  the sealing lips (8) which, under this effect, are

  pushed and spread elastically, these lips become

  can then seal tightly on the pipe. When the pipe is sufficiently depressed the axial ends of the sealing lips (8) move away from each other, so that the seal which was formed between these lips is removed and that it opens a passage of air through the pipe (16). This establishes

  the desired compressed air connection.

  According to a preferred embodiment, suitable retaining means may be provided on the side wall of the fitting orifice (12) for retaining

  connected pipe (16) and protect it from

  involuntary. FIG. 1 shows in this regard a toothing (13) integrally formed on the connecting sleeve (4) and which is suitable for biting into the

  wall of an elastic pipe, for example, a pipe.

  The toothing (13) has a tapered flank (15) which tapers in the direction of the fitting of the pipe and which falls down sharply on the side wall (14) of the fitting orifice (12), forming a shoulder . This flank (15) opposes a relatively weak resistance at the time of the fitting of an elastic pipe while the

  reverse movement is made much more difficult.

  When the pipe is extracted from the connecting sleeve (4), the sealing lips (8) spring back to their initial position, in which they are pressed against each other forming a tight seal. orifice (2) is thus closed again and

  the compressed air supply is interrupted. It is easy

  to see that the sealing lips (8) exert

  same time the function of a non-return valve which de-

  terminates a shutdown of compressed air when removing the

  conduct. This arrangement makes the connection to

  according to the invention convenient to use and reliable in operation and it ensures at the same time a

  energy saving in the form of compressed air.

  As indicated, the connecting sleeve (4) is preferably snapped into the wall (3) of a compressed air distributor (1). However, depending on the geometry of the connection, it is also possible to provide other forms of attachment for the socket of

  connection (4), which will eventually have to

  modified thread. In particular, the connecting sleeve (4) can have the configuration of a plug, so that it can be attached to the end of a tube constituting

  a compressed air line, or an equivalent member.

Claims (8)

  1.- Connection unit intended to establish a   connection between a joint air distributor   The invention is characterized in that it comprises a connection socket (4) which can be attached to an orifice (2) of the air distributor (1) and a pipe (16) which is to be connected. compressed (1) and which closes this orifice (2) by means of elastic sealing lips (8) which are applied against each other forming a seal, this sleeve having a fitting orifice (12). ) in which the pipe (16) can be depressed,   separating the sealing lips (8).   2. A connecting unit according to claim 1, characterized in that the connecting sleeve (4) has a tubular body (5) of substantially cylindrical shape, one axial end is open and of which   the other end can be closed by the lips of   (8) formed on its periphery and which join together on the central axis.   3.- Connection unit according to one of the claims   catations 1 and 2, characterized in that the sealing lips   Cheeti (8) are curved with a concave shape.   4.- Connection unit according to any one   Claims 1 to 3, characterized in that   has two to six sealing lips (8) arranged symmetrically. 5. Connection unit according to any one   Claims 1 to 4, characterized in that the sur-   faces (10) of the sealing lips (8) which are in contact   tact between them are toothed and / or stepped to form   sea a sort of labyrinth seal.   6.- Connection unit according to any one   Claims 1 to 5, characterized in that the socket   connection piece (4) can be snapped into the orifice (2) of the compressed air distributor (1), for example by means of one or more flanges (6) which are formed on the body tubular (5) and form radial projections. 7. - Connection unit according to any one   Claims 1 to 6, characterized in that the   connecting sleeve (4) can be attached in the manner of a plug at the end of a pipe forming a pipe of compressed air.   8.- Connection unit according to any one   Claims 1 to 7, characterized in that it is   provided on the side wall (14) of the plug hole   (12), retaining means, for example constituted   by a toothing (13) formed on this wall, which retains   bring the driving together, preventing it from