JPS58187687A - Joint for pressure hose - 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 The present invention relates to a coupling for a pressure hose, and is particularly useful in connection with a pressure hose used in a fluid control system assembly in which machine controls and process controls are actuated by fluid pressure. It is something.

A typical coupling according to the invention is used in a pressure system that conveys pneumatic, hydraulic or hydraulic pressure through a pressure hose G for controlling various devices. Such systems are equipped with a large number of different pressure hoses,
Connects the pressure source and I/X filter, process control equipment or equipment control equipment, valves, relays, etc. Typically, such systems are assembled by hand and the hose is cut to the desired length. Valves, control devices, etc. are formed with one or more internally threaded holes into which externally threaded threaded joints are forcefully secured. The lengths of hose are then secured into the threaded fittings, which connect the hoses to valves, controls, and other components. Many such fittings have been designed in the past. Generally speaking, they must meet three general conditions. That is, the joint must be easy to assemble by hand. They must provide good sealing for air and other fluids within the intended pressure range of the system. Since they are used in large numbers, they must be inexpensive to manufacture and sell.

However, prior art couplings are typically of relatively complex, multi-piece construction, which necessarily results in relatively expensive assemblies. Moreover, the multi-piece construction of such previous fittings has been problematic in providing a good seal.

It is particularly desirable to provide a helically threaded body portion in such fittings. Its body part can be helically screwed into the specific four parts to which the hose is to be connected, for example;
Also, the hose itself can then be introduced into the body part and secured and sealed without the use of further screw fasteners. It is somewhat disadvantageous that a second threaded fastener is used. This is because such extra tightening of threaded fasteners can cause the hose to kink, or even damage the hose or fitting as a result of over-tightening, and is therefore undesirable for these reasons. .

To overcome this problem, it has been proposed to provide a hose coupling of the above type with a linear hose clamping or locking action. Such fittings have a threaded metal body and
It consisted of a plastic sleeve with multiple fingers extending around the hose. A wedging sliding collar was provided around the outside of the finger so that when the collar was pulled along the sleeve away from the threaded body, the collar clamped the finger tightly against the hose. When the collar was pushed in the opposite direction toward the threaded body, the collar released the fingers allowing the hose to detach. In this system, the sleeve and finger arrangement is manufactured separately from the threaded body and is held in place within the threaded body in a relatively weak and unsatisfactory manner, thus requiring a separate O-ring. It was necessary to make an air seal using

The fingers were held in place in the four parts within the metal body by a simple frictional or push-fit engagement. Often parts disassembled during shipping or storage. Once assembled with the hose, arbitrary movement of the hose, especially bending movement near the joint, could cause the hose to separate from the metal body. Furthermore, since this unit had a multi-component structure,
Manufacturing costs were relatively high.

The present invention provides a hose fitting having a threaded body and a clamping finger extending from the threaded body portion. The body portion and the fingers are formed in a transparent manufacturing process as a single integral one-piece unit, and the fingers are formed with an annular enlargement around the exterior of the fingers that further fits captively around the fingers. A separate sliding collar is provided which can be slid along the finger relative to the annular enlargement so that the collar is compressed when the collar is pushed towards the threaded body portion. death,
Release the fingers when the collar is pulled away from the body. The finger also has an elongate tooth-like member on the inside that is arranged to engage and bite into the outer surface of the hose when squeezed, and the transition between the finger and the threaded body. The sleeve has an internal sealing sleeve of progressively decreasing diameter that comes into sealing engagement with the outside surface of the hose as it is forced into the sleeve.

On the collar is a collar retaining ring with an angled interior surface to facilitate pushing the collar over the enlargement and fingers during the initial assembly process.

In certain preferred embodiments of the invention, the hose-engaging teeth extending along the axis of the fingers are diagonally shaped and have a coarse pitch thread to provide an elongated hose clamping surface. give.

In a further particular aspect of the invention, the threaded body is provided with an externally threaded end that is tapered to seat within the internally tapered hole, and the taper of the nail-shaped threaded portion on the threaded body has an internally threaded end. Having a wider angle than the threaded taper in the perforated hole provides an effective seal when the two are threaded together.

Another related object of the present invention is to provide a hose connection, a rotatable body received within such hose connection, and a rotatable body provided on the rotatable body to attach one body to another. It is an object of the present invention to provide a rotatable T-shaped branch with a head that acts in a threaded manner.

In another aspect of the invention, the fingers are further provided with an annular quadrant, and the collar is provided with an enlarged portion that engages therewith, so that the hose expands into its recess when it is clamped between the -H fingers. The collar is retained by the engagement of the parts.

The various features and novelties which characterize the invention are pointed out and described in the claims annexed to and forming a part hereof. For a better understanding of the objects achieved by the practice of the invention, reference is made to the accompanying drawings and description, in which preferred embodiments of the invention are illustrated and described.

Referring now to FIG. 1, the hose fitting is indicated as a whole by the reference numeral (10), and a portion of the hose, indicated in dashed lines as (H), is shown inserted into the fitting. There is. The joint (10) has a solid axially bored hole (14) defined thereon, and an externally threaded portion (14) thereon.
6). As shown in Figure 1, the male threaded portion is tapered like a pipe thread.

The outer end of the body portion (12), i.e. the end remote from the screw (16), is provided with a plurality (four in this example) of individually spaced fingers (18) extending in the axial direction of the hose fitting (lO). is provided. The fingers (18) are shown as having a generally partially cylindrical cross-section which substantially defines the contour of the cylindrical tube structure. Each finger has a certain degree of flexibility,
They are in this case bodies (12
) is formed integrally with the Preferably such material should be an injection molded thermoplastic, although the present invention does not exclude any other material from which the hose fitting may be conveniently made. The finger (18) has an internal bore hole (
20), the outer diameter of which is the bore hole (20) of the main body (12).
Note that it is significantly larger than the inner diameter of 14). At the transition between the finger (18) and the body α2) a sealing sleeve is formed by the inner surface of the body (12), which sleeve becomes smaller than the outer diameter of the hose (H) at the transition point. It gradually tapers inward and becomes slightly thicker, terminating at shoulder 03).

The tapered tapering at the transition between the fingers and the body provides a tapered sealing sleeve into which the end of the hose (H) is pushed during assembly. In this way, the sleeve (2
2) achieves a squeezing or squeezing effect on the outer surface of the end of the hoe 2, (H). As a result, a good air or water pressure seal is created at this location without the use of additional sealing devices such as O-shaped springs or the like that were required in the past.

The inside of the finger (18) has an inwardly facing tooth member (2).
4), which has a relatively sharp edge and is intended to bite into the outer surface of the hose (H), clamping it and fixing it in place.

Such teeth (24) in FIG. 1 are merely in the form of sharp internal annular projections, as shown in FIGS. 1 and 2.

The fingers (18) are separated from each other by axial slots (26) extending downwardly from their free ends and terminating just before reaching the sealing sleeve (22). In this way, the fingers (18) can be bent inward to clamp and secure the hose (H) in place without interfering with each other (see FIG. 2).

The size, shape, and number of fingers (18) and associated slots (26) are, of course, relatively variable. Thus, the fingers may have more or less than four and may have a curved or arcuate shape and may be flat in cross section. Slots (26) may be of various shapes and widths. The only criterion is that the fingers (18) are preferably able to curve inward so that their teeth grip the hose.

The outside of the free end of each finger (18) is provided with a tightening enlargement (28), the enlargement 5 (2s) being a wedge angled outwardly at its free end. It has a surface (30) and an inwardly facing collar stop (32) opposite the surface (30).

In order to apply a squeezing action to the fingers, a sliding tightening collar member (34) is provided, which is an annular member formed separately from the fingers (18).

The collar member (34) is provided with a large annular inner quadrant (36) shaped to receive and conform to the enlargement (28) on the finger (18).

An inwardly directed annular retaining ring (
38) engages the collar stop (32) to prevent the collar member (34) from slipping off the finger (18) once assembled. The ring (38) has an inwardly facing angled surface (39).

The outer end of the collar member (34) includes a small diameter clamping ring portion (40) and a tapered cam surface extending between the clamping ring portion (40) and the enlarged annular quadrant (36).
42) is given. Preferably, according to the invention, the tapered surface (42) has an enlarged portion (42) on the finger (18).
28) having approximately the same angle as the upper wedge surface (30).

As shown in FIG. 2, when the tightening collar member (34) is pushed inward, that is, toward the body, the cam surface (42) of the collar member engages the wedge surface (30) on the finger (18).
, and gradually squeezes the fingers (18). When pressed deeply enough, the tightening ring portion (40) rests on the annular enlargement (28) and holds the fingers (18) in an inwardly compressed position as shown in FIG.

It can be seen that in this position the hose () is engaged by the teeth (24), which securely hold the hose in place.

It is an important feature of the invention that this wedging or clamping action is achieved by inward movement of the collar member (34) relative to the fingers (18).

All that is required is to cut the free end of the hose (H) to the desired length and then push the hose downward into the open bore hole (20) defined by the finger (18) to remove the sleeve. (22) All you have to do is put it inside. The hose (H) is then firmly pushed into the sleeve (22) until the free end engages the hose stop surface (23), thus creating a good seal by the surface (23) squeezing the hose. The collar member (34) is then slid inwardly or downwardly along the finger (18) toward the body (12), thereby removing the finger (18).
is squeezed tightly around the hose (H), thus clamping the hose in place.

In fact, - the collar member (34) for inserting and tightening the hose (H)
) and both inward movements can be performed with the same hand. This is because the direction of the tightening movement of the ring (34) is the same as the direction of the force applied to the hose Q () to ensure that the hose is held in place and tightened. First of all, a large number of bodies (12
) into position in their appropriate valves or into position in their connector blocks (not shown), after which the hoses (H) are easily inserted and tightened into position by movements all occurring in the same direction. It is possible.

Thus, workers can work quickly and effectively within a relatively confined space without special training.

Initial assembly is facilitated by the cooperation of the wedge surface (30) or enlargement 08) and the angled surface (39) of the ring (38). In this way, the collar member (34) is attached to the enlarged part (2).
8) Although it can be press-fitted to the top, it cannot be easily removed.

At the same time, the entire joint (lO) has only two parts, one part constituted by the integral body part (12) and the fingers (18), and the other part constituted by the sliding collar (34). , the fittings will not disassemble even during heavy abuse. Once inserted, bending of the hose will not separate the fingers from the body. This is because both have an integral structure.

As shown in FIGS. 3 and 4, the teeth (24) of the finger (18) are diagonally angled teeth (24&, 24).
b) may be replaced by Such tooth angulation has the advantage of substantially preventing the hose from being rotated or twisted. Further angulation can be achieved by tightening the hose (H) over a larger length.
The frictional engagement becomes larger.

According to another feature of the invention, it is also possible to improve the sealing between the externally threaded part (16) and a standard internally threaded seat for fixation outside thereof.

As shown in FIG. 5, a typical internally threaded socket is designated generally as (S). such a socket)
(S) may be formed in a valve, relay or other actuating member, or may be part of a connector block, all of which may be used in the art related to pneumatic control equipment or other hydraulic applications. It is well known and requires no further explanation.

Depending on the particular design of the system, the socket (S) can be threaded with conventional parallel side threads, in which case of course the male thread on the hose coupling (10) will also correspond and Externally threaded portion (16
) is formed. In this case, a sealant of some kind, usually in the form of a sealing ring or a sealing tape, must be provided and, in some cases, an adhesive filler or mastic of some kind must be used. .

In many cases, the internal threads are tapered, like vibrator threads. In this case, the hose joint (10)
The upper male thread (16) is also of a tapered configuration, like a pipe thread, so that it mates with the tapered thread of the female socket (S).

Again, although the screws are much more securely tightened, it is still necessary to provide some kind of seal, usually in the form of a plastic sealing tape wrapped around the screws.

In fluid control systems, such closures pose problems. Small particles of the seal can fall off the screws and enter the hoses and valves, causing serious failures.

It avoids any problems associated with the use of this type of closure, or indeed any other closure. Therefore, the present invention has a structure (16) on the main body (12) as shown in FIG.
The female threaded part (S) is attached to the male threaded part shown as a).
) gives a larger Theber. Furthermore, the main body (1
Since the material 2) is usually a thermoplastic, it can be deformed relatively easily.

The male threaded portion (16) thus becomes the female threaded portion (S
) and rotated twice or three times to secure it. At this stage, the screws are firmly fixed, and the main body (12
) to create a complete connection between the male, female and female threads as well as actual deformation of the thermoplastic male thread (16a). It has been found that this makes it possible to achieve a virtually complete seal, at least for purposes of the type of apparatus under consideration, without the use of any extra seals.

Obviously, if such a structure is over-tightened, the threads will break and the hose fitting (10) must be replaced.

However, after a little practice, it is possible for the operator to quickly make decisions about when sealing is achieved and at what stage further tightening will cause destruction of the screw itself.

In this way assembly of the entire structure is performed much more quickly with substantial overall cost savings.

According to an optional feature of the invention, as best shown in FIG. 6, an interdigitating annular ring (50) is formed within the tightening enlargement (28) adjacent its forward end.
and a complementary mating locking rib (52) formed on the inner surface of the collar member (34).

The lip (52) is seated in the recess (50) when the collar member is pushed deeply into the tightened engagement state, and therefore the collar member secures the rib so that it does not loosen even when shaken. to hold. However, if you apply enough pressure with your hands, the rip will clearly dislodge.

In many cases, when such hose fittings are used, it is desirable to provide a seven-branch unit such as that best shown in Figures 7 and 8. Such T-branches are usually , - the hose connection on the blade side is made so that it can rotate relative to the other side for the purposes described below.

The T-shaped branch unit according to the invention therefore has a clamping finger (
18), tightening enlarged part (28), and tightening sleeve (8)
4).As described below, on the inner surface of the finger (18) there is an angled clamping member such as clamping m (24) or (24A and 24B). Placed.

The fingers and sliding collar members also have internal sliding wedge surfaces as described above.

However, the hose connection member (60) is formed with a substantially orthogonal cylindrical coupling sleeve (shown as 62), which is open at both ends to allow fluid to pass through the connection member (60). It leads to the inside.

The upper end of the cylindrical sleeve (62) is provided with an inwardly folded locking and retaining ring (64), the other end of such sleeve (62) defining a normal cylindrical shape. .

The other part of the T-shaped branch is a rotatable main body part (66)
including. The body portion (66) has a typical tapered threaded portion (68) at one end and a central bore hole (70) for fluid passage.
).

A hexagonal drive surface (72) may be formed on the body (66) that can mate with a suitable wrench.

A neck portion, generally designated (74), extends upwardly from the main body (66) and includes a waisted central region (76) and a lateral through-hole (78) leading into the interior of the sleeve (62). It is given.

A drive head (8o) extends above the neck (74) and is provided with a screwdriver groove or other drive means (82).

A locking edge (64) is located between the head (80) and neck (74).
) is formed with an annular locking recess (s4) for receiving it.

Above and below the waist portion (76) are two spaced apart annular grooves or recesses (86) for receiving a typical 0-shaped ring (88) therein.

The O ring (88) supports the internal surface of the sleeve (66) and provides a good and effective pressure seal above and below the waist (76).

Such a T-branch is particularly simple to assemble and is assembled by simply pressing the head (80) upwardly through the cylindrical sleeve (62). The resilient snapping action of the material causes the head (80) to pass through the locking rib (64) and the lip (64) fits into the groove (84) to secure the head against dislodgement.

The entire neck (74) and body (66) are thus free to rotate within the sleeve (62), but the 0-shaped ring (88)
to prevent loss of fluid and fluid pressure.

In this way, if necessary, the hose can be connected in the manner described above into the finger (18) and then, if necessary, the screw (68) can be removed by simply turning the head (80) with a screwdriver. The body (66) can be secured in a suitable threaded recess formed to receive it. Alternatively, a wrench can be used to rotate the structure by the surface (72) if desired. Even during use, the hose connection part (60) can be rotated around the neck (74) with withstanding pressure without disturbing the seal.

The above description is of a preferred embodiment of the invention, given by way of example; the invention should not be construed as being limited to any specific features described.

It is to be understood that all such modifications and variations are within the scope of the appended claims.

[Brief explanation of the drawing]

1 is a longitudinal cross-sectional view of a hose coupling according to the invention; FIG. 2 is a view corresponding to FIG. 1 with the fingers squeezed; and FIG. 8 is a cross-sectional view of an alternative embodiment. 4 is a cross-sectional view of another alternative example, FIG. 5 is a cross-sectional view of another featured example of the present invention, and FIG. 6 is a cross-sectional view of yet another featured example of the present invention. 7 is an exploded perspective view of a rotatable T-shaped branch according to the present invention, and FIG. 8 is a cross-sectional view taken along line 7--7 of FIG. 12...Body portion 18...Q finger 28-, -ridge around the finger 34Φ...Collar member 24--, finger line device 22 Fist... Sleeve. 3 Procedural amendment type 1 Indication of the case Patent Application No. 62397 of 1982 Name of the invention Pressure hose joint 3 Person making the amendment Relationship to the case Applicant Name Name Guhard Swigfried Erik
Schmidt 4 Agent 6 Subject of amendment

Claims (9)

[Claims] (1) A hose joint to be attached to a hose, which includes a main body portion (12) defining a boring hole (14), and a hose tightening finger (I) extending from the main body portion (12).
a finger (18) formed as a single integral part unit with the body portion;
8) and an enlarged portion (28) of the outer periphery of said finger (1).
8) Attaching a sliding collar that fits to capture the surroundings (34)
so as to squeeze the fingers (18) when the collar device (34) is slid towards the body portion (12), but when the collar device (34) is slid towards the body portion (12).
2) When sliding in the direction away from the finger (
said sliding collar device (34) capable of sliding along said finger (18) relative to said enlargement (28) so as to release said finger (18); an internal toothing device (a4) on said finger (18) constructed and arranged to not only engage but also bite into the outer surface of said hose when squeeze-gathered; an internal sealing sleeve device (22) of progressively decreasing radius for sealing engagement with the
) and hose fittings. (2) A hose coupling according to claim 1, in which the toothed device (24) is angled. (3) A hose coupling according to claim 1, in which the collar device (34) has a wedge surface (42) for squeezing the line device (28). (4) A hose coupling according to claim 3, in which the enlarged portion (28) has an angled camming surface (30) cooperating with the wedge surface (42). (5) A hose coupling according to claim 3, in which the collar device has a retaining ring (38). (6) A hose coupling according to claim 1, wherein the sealing sleeve device (22) is tapered to squeeze the end of the hose. (7) The hose coupling according to claim (1) has a complementary locking portion (50), a rib (52) shape formed on the collar device (34), and the tightening A hose joint that includes a finger (18) to fix the recess and the rib in a clamping relationship at a tightening position. (8) A hose coupling according to claim (1), comprising a threaded connection device (16) on the body portion. (9) The hose joint according to claim (1), wherein the hose joint is formed on the main body portion and has a face boring hole (14).
) a generally cylindrical sleeve portion (62) communicating with the sleeve portion (62); a rotatable body member (66) shaped and adapted to be received within the sleeve portion (62);
a locking device (64) for retaining the body member (66) within the sleeve portion (62); and a sealing device (64) for sealing between the rotatable body member (66) and the cylindrical sleeve portion (62). 88) and a hose joint that holds it. (b) The hose joint according to claim (9) includes a locking ring (64) formed inwardly from the cylindrical portion, and a locking ring (64) formed on the main body member (66). ) complementary locking four parts (65
) and hose fittings. (b) The hose coupling according to claim (a) includes a neck (74) shaped on the body member (66) to fit within the cylindrical sleeve portion (62). the neck (74), having a constriction region (76) around the circumference of the neck and a transverse bore hole (78) passing through the neck portion;
Upper and lower type 0 ring seals mounted on top (88)
Including hose fittings. (b) The hose joint according to claim (b) may include a screw type fixing device (68) on the main body member (66).
) and a bore hole (70) extending through the body member (66) and communicating with the lateral bore hole (78). (b) a head (80) extending outwardly from the cylindrical sleeve portion (62) and above the neck portion (74) in a hose coupling according to claim (b); A hose fitting including a drive surface (82) formed on the head (80) for engagement with a tool.