JPH02118297A - Simple swivel host joint - Google Patents

Abstract

PURPOSE:To provide an easily connectable simple swivel hose joint by forming it from a nipple constituting a hose fitting part, a screw-provided nut rotatable in the circumferential direction of the nipple, and a ring-shaped seal member to be set between the nut and nipple. CONSTITUTION:A hose joint according to existing invention consists of a nipple 6, nut 9, and O-ring 12, wherein the nipple 6 is provided at on end with a ring- shaped boss 7 and at the other end with a host fitting part 8 for fitting of a host 1. The nut 9 has an inner dia. smaller than the ring-shaped boss 7 on the nipple 6 and is provided with a dia enlarged part 10 capable of accommodating this ring-shaped boss 7, and this dia. enlarged part 10 and ring-shaped boss 7 are fitted to the nipple 6 so that rotation is possible in the circumferential direction, wherein a male screw 11 is formed on the outside surface. The O-ring 12 of ring-shaped seal member is accommodated between the inside surface of the nut 9 and the outside surface of nipple 6. This ensures that connection is made with good sealing performance without twisting the hose.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a simple swivel joint for connecting hoses to various devices.

[Conventional technology]

When connecting a rubber hose or synthetic resin hose to various types of equipment, secure a connecting fitting with a male thread to one end of the hose, and screw the male thread of this fitting into the female thread of the access port of the device's manifold, etc. The method is normal.

However, if you use this method to rotate the fitting fixed to one end of the hose in order to screw it into the connection port on the equipment side,
Inevitably, the hose fixed to the connection fitting must also be rotated. Therefore, with a long or large diameter hose, it is difficult to rotate the hose itself, and if the other end is already fixed, the hose may rotate and become twisted when one end is screwed into the connection. There was a drawback that it could be done.

Therefore, in order to eliminate the need to rotate the hose when connecting, a swivel type joint has been devised that can freely rotate 3600 degrees in the circumferential direction and connect the hose without twisting. Most swivel joints are equipped with a freely rotatable union nut or sleeve nut and an adapter with male threads on both ends.
This is explained in the publication. That is, as shown in FIG. 2, such a swivel type joint can be rotated in the circumferential direction by fitting a sleeve nut 2 having a female thread on the inner periphery of one end into an annular groove formed on the outer periphery of one end of the sleeve 3. After installation, the other end of this sleeve 3 is inserted into one end of the hose 1, and then the outer circumferences of the hose 1 and the sleeve 3 are tightened with a socket 4 to fix them. −
In addition, the adapter 5, which has male threads on both ends, can provide a seal to the device side connection port by screwing the male thread of one tapered screw into the female thread (not shown) of the tapered screw of the device side connection port. and fix it. Therefore, by rotating the sleeve nut 2 attached to the hose 1 via the sleeve 3, and screwing the female thread of the sleeve nut 2 into the other male thread of the adapter 5 fixed to the device connection port, the hose 1 is connected to the device connection port. Can be connected without twisting.

However, conventional swivel joints require an adapter 5 in addition to the union nut or sleeve nut 2, and have a large number of parts.
The female screw of the adapter 5 and the male screw of the adapter 5 which are screwed thereto use special screws instead of taper screws that are normally used when sealing performance is required, and therefore there is a problem in that the cost becomes extremely high. Furthermore, as mentioned above, the sealing performance between the union nut or sleeve nut 2 and the adapter 5 is not good, so the sealing performance is ensured by tapering one end of the sleeve 3 and the other end of the adapter 5 and bringing them into pressure contact. However, it had the disadvantage of being susceptible to vibration.

Furthermore, in order to fit the sleeve nut 2 into the annular groove of the sleeve 3, it was necessary to caulk the sleeve nut 2 from the outer periphery to reduce its diameter, which required a lot of effort for assembly.

[Problem to be solved by the invention]

In view of such conventional circumstances, it is an object of the present invention to provide a simple swivel joint that has a small number of parts, is inexpensive, and can be easily connected without twisting the hose when connecting the hose.

[Means to solve the problem]

In order to achieve the above object, the simple swivel hose joint of the present invention includes a nipple that has an annular protrusion on the outer periphery of one end and extends from the annular protrusion to the other end to form a hose fitting part; An enlarged diameter part with a larger diameter than the annular protrusion is formed at one end of the center hole which has the same diameter or a larger diameter as the hose fitting part and a smaller diameter than the annular protrusion, and the enlarged diameter part and the annular protrusion are formed on the outer periphery of one end of the nipple. A nut fitted with a nut and rotatable in the circumferential direction and having a male or female thread formed at one end, and an annular seal member disposed between the inner circumferential surface of the nut and the outer circumferential surface of the nipple. It is characterized by the following.

〔Example〕

An example of the simple swivel hose joint of the present invention will be explained with reference to FIG.

This simple swivel hose joint essentially consists of a nipple 6, a nut 9, and an O-ring 12. The nipple 6 is a substantially cylindrical body made of stainless steel, and has an annular convex portion 7 on the outer periphery of one end thereof, and the other end forms a hose fitting portion 8 into which a hose 1 is inserted. The nut 9 is also made of stainless steel, and its center hole has an inner diameter that is the same as or larger than the outer diameter of the hose fitting part 8 of the nipple 6, and smaller than the outer diameter of the annular convex part 7 of the nipple 6, An enlarged diameter portion 10 is formed on the inner periphery of one end of the center hole, which can accommodate the annular protrusion 7 of the nipple 6 (therefore, has a larger inner diameter than the annular protrusion 7). Further, a male thread 11 of a tapered thread is provided on the outer periphery of the nut 9 from one end to the other end. However, it goes without saying that the thread of the nut 9 may be a female thread formed on the inner periphery of the nut 9 corresponding to the thread of the device side connection port.

The nut 9 is inserted into the outer periphery of the nipple 6 from the other end,
The difference in level between the other end of the enlarged diameter portion 10 and the center hole abuts against the annular convex portion 7 of the nipple 6, making it impossible to move toward the one end. In this position, the annular projection 7 at one end of the nipple 6 is completely accommodated inside the nut 9.

In order to seal between the nut 9 inserted as described above and the nipple 6, a circumferential groove is provided on the outer periphery of the annular convex portion 7 of the nipple 6, and a moving O-ring 1 consisting of N B and R is provided in the circumferential groove.
The enlarged diameter portion 10 of the nut 9 accommodates a second-class annular seal member.
It is arranged so as to be in pressure contact with the inner periphery of. The position of the annular sealing member such as the O-ring 12 is not limited to the above-mentioned position as long as it is between the nipple 6 and the nut 9, and a circumferential groove may be provided on the nut 9 side for storage.

After inserting the nut 9 into the nipple 6 as described above, insert the hose 1 into the outer periphery of the hose fitting part 8 at the other end of the nipple 6,
In order to prevent the hose 1 from coming off, a socket 13 is placed over the outer periphery of the hose 1 over the overlapping portion of the hose 1 and the nipple 6, and the hose 1 is tightened and fixed by caulking. In order to prevent the hose 1 from coming off, preferably a plurality of grooves 14 may be formed in the circumferential direction on the outer periphery of the nipple 6 to increase the frictional resistance with the hose 1.

In a preferred embodiment, the hose l is fixed with a gap between one end of the nipple 6 and the other end of the nut 9 inserted, and the other end of the nut 9 is fixed with a locking pin 15 or a locking pin inserted into the outer periphery of the nipple 6. Support with retaining ring. By doing this, the nut 9 is supported so that it can be rotated in the circumferential direction but not moved in the axial direction, and at the same time, when the O-ring 12 is inserted or replaced, the locking pin 15, etc. If you remove the nut 9, you can move the nut 9 to the other end without removing the hose 1.
Replace the ring 12, etc.

[Effect]

In the simple swivel hose joint of the present invention, the male thread 1
1 is supported on the outer circumference of one end of the nipple 6 by an annular convex portion 7 of the nipple 6 so as to be rotatable in the circumferential direction without being detached outwardly.

Therefore, when connecting the hose 1 to the device side connection port with this simple swivel hose joint, a special sleeve nut 2 is required as in the conventional swivel type joint described above and shown in FIG.
The hose 1 can be easily connected by simply screwing the nut 9 into the device side connection port without using the adapter 5 or the adapter 5. Moreover, since the nut 9 can freely rotate around the outer circumference of the nipple 6, the nipple 6 and the hose 1 connected thereto will not rotate or be twisted even if the nut 9 is turned for screwing.

Furthermore, there is a slight gap between the nipple 6 and the nut 9 so that the nut 9 can rotate, but since an annular sealing member such as an O-ring 12 for movement is placed between this gap, oil and other No fluid leaks outside from this gap. Further, since a tapered screw can be used for the male thread 11 or the female thread of the nut 9 to match the connection port on the device side, sealing performance at the connection port is also ensured.

〔Effect of the invention〕

According to the present invention, there is provided a simple swivel hose joint that has fewer parts than conventional swivel joints, is less expensive, and allows hoses to be connected easily and with good sealing performance without twisting the hose when connecting the hose to various devices. can be provided.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing a specific example of the simple swivel hose joint of the present invention, and FIG. 2 is a sectional view of a conventional swivel type joint. l...Hose 2...Sleeve nut 3...Sleeve 4...Socket 5...Adapter
6... Nipple 7... Annular convex part 8... Hose fitting part 9... Nut 10... Expanded diameter part 11... Male thread 12... O-ring 13... Socket 14... Groove

Claims (1)

[Claims] (1) A nipple that has an annular protrusion on the outer periphery of one end and extends from the annular protrusion to the other end to form a hose fitting part, and an annular protrusion that has the same diameter or a larger diameter as the hose fitting part of the nipple. An enlarged diameter portion having a larger diameter than the annular convex portion is formed at one end of the smaller diameter center hole, and the enlarged diameter portion and the annular convex portion are fitted to the outer periphery of one end of the nipple so as to be rotatable in the circumferential direction, A simple swivel hose joint comprising: a nut having a male or female thread formed at one end; and an annular seal member disposed between the inner peripheral surface of the nut and the outer peripheral surface of a nipple.