JPH0113902Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a pipe joint with a swivel structure, and in particular, a swivel structure that has an extremely simple structure and is easy to assemble, for example used for hydraulic and pneumatic applications. Regarding pipe fittings equipped with

[Conventional technology]

Pipe fittings are generally used in piping systems that transfer various fluids, including hydraulic and pneumatic equipment, especially pipes such as L-shape and T-shape where the inlet and outflow directions of the fluid are not aligned in a straight line. The fitting is designed so that the fitting body and threaded part are separate and independent so that the pipe can be taken out in any direction even after the threaded part is fixed, in consideration of piping work in narrow and complicated places and cases where the connection is twisted. A rotatable structure, a so-called swivel structure, has been developed and is widely used.

For example, in Japanese Utility Model Publication No. 59-22380, a nut is fitted into one fluid inlet protruding from the lower end of an L-shaped joint body containing a flow rate control mechanism, and a nut is fitted into the tip of the one fluid inlet. Further, the nut is provided with a collar that engages with each other to prevent the nut from escaping, and a connecting bush that is connected to the one outlet inlet and screwed onto the cylinder is screwed onto the nut to prevent the one outlet from flowing out. A gasket is inserted between the inlet and the connecting bush, and the nut and the connecting bush are screwed and fixed with the other outflow inlet of the joint body facing in a desired direction within a plane parallel to the operating direction of the cylinder. A pipe joint with a flow control mechanism is disclosed.

However, such a structure in which nuts and connecting bushes are used for fixing the device requires a large number of parts, leading to an increase in product cost. In addition, when attaching the above-mentioned pipe joint to a cylinder, first unscrew the connecting bushing from the nut, insert a gasket into the fluid inlet and outlet of the cylinder, screw the connecting bushing, and then screw the O-ring into place. The above-mentioned nut is screwed to the connecting bushing through a packing such as the above, and the nut is firmly tightened and fixed to the connecting bushing with the outflow inlet formed on the side surface of the joint body facing in the desired direction. Because of this, it takes time to install, and there is also the disadvantage that it is easy to lose the O-ring inserted between the lower surface of the joint body and the connecting bush.

In addition, Japanese Utility Model Publication No. 59-26144 discloses another structure in which an O-ring is arranged in a nipple that has an O-ring receiving annular groove and a connector wire receiving annular groove on the outer circumferential surface, and then an annular inner circumferential groove for receiving the connector wire is provided. A swivel adapter having a nut portion formed on the outside thereof is arranged so as to concentrically surround the nipple, and a connector wire is inserted through a suitable hole provided on the outer surface of the nut portion of the swivel adapter. Accordingly, a high-pressure hose pipe joint is disclosed which has a swivel structure in which the swivel adapter is fixed in the axial direction of the nipple, and the swivel adapter is rotatable relative to the nipple.

However, even with such a configuration, the number of parts is large, and it takes time to connect the swivel adapter and the nipple, so it cannot be an inexpensive pipe joint. Furthermore, there is also the drawback that the dimensions of the entire pipe joint cannot be shortened.

[Problem that the invention attempts to solve]

This idea was developed in view of the above-mentioned drawbacks of the conventional technology.It has a small number of parts and can be easily assembled without using special assembly jigs, which makes it possible to reduce manufacturing costs. The purpose of the present invention is to provide a pipe joint with a swivel structure that allows the dimensions to be reduced compared to the conventional pipe joint.

[Means for solving problems]

In order to achieve the above-mentioned purpose of this invention, this invention provides a joint fixing member having a threaded portion and a nut portion, and a pipe that is rotatably connected to the joint fixing member. In the pipe joint, the joint fixing member and the joint body have an annular groove provided on one of them and formed obliquely with respect to the rotation axis, and an annular groove provided on the other side. A pipe joint is constructed by being rotatably locked by a tongue piece fitted into the annular groove.

In this configuration, the joint body connected to the joint fixing member includes, for example, a connection mechanism for a pneumatic pipe joint that can be quickly and repeatedly attached and detached, a flow rate control mechanism,
A connection mechanism such as a connection mechanism for high pressure can be applied or built-in depending on the various uses and the material of the pipe to be connected.

Further, one of the annular groove and the tongue portion that engage with each other, which are means for connecting the joint body and the joint fixing member, may be provided on either of them.

[Effect]

According to this invention, as described above, in a pipe joint in which a joint fixing member having a threaded portion and a nut portion and a joint body having a connection mechanism with a pipe are rotatably connected, the joint fixing member and the joint body are rotatably locked by an annular groove provided on one of them and formed diagonally with respect to the rotation axis, and a tongue piece provided on the other side and fitted into the annular groove. Because it is a pipe joint with a swivel structure, it is possible to connect the joint body and the joint fixing member without using special assembly jigs, and there are fewer parts, so it is easier to connect than a pipe joint with a conventional swivel structure. Therefore, manufacturing costs can be reduced, and the dimensions of the pipe joint can also be shortened.

〔Example〕

FIG. 1 is a partial vertical sectional side view of a pipe joint 1 according to an embodiment of this invention.

This pipe joint 1 has a male screw part 3 for fixing on one side with a nut part 2 provided in the center as a boundary,
The other outer circumferential surface has a seal ring receiving annular groove 4 for locking the seal ring, and a seal ring receiving annular groove 4 adjacent to the seal ring receiving annular groove 4, which opens diagonally outward with respect to the rotation axis, and the opening is used to lock the seal ring. A cylindrical joint fixing member 6 including an annular groove 5 provided toward the receiving annular groove 4 side, and a seal ring receiving annular groove 4.
It has a seal ring 7 disposed in the joint fixing member 6, a tongue piece 8 fitted in the annular groove 5 at one end, and a connection mechanism with the pipe 10 at the other end, which rotates with respect to the joint fixing member 6. It is composed of a joint body 9 that is movably connected. In this configuration, instead of the male threaded portion 3 of the joint fixing member, it may be fixed using a female thread.

Next, the case where the pipe joint 1 is assembled by connecting the joint main body 9 and the joint fixing member 6 will be described based on FIG. 2. One end has a tongue piece 8 with a chamfered tip and a support part 81 for preventing the joint body from swinging, and the other end has a pipe for a hydraulic/pneumatic connection mechanism, a flow rate control mechanism, etc. The joint main body 9 equipped with a connection mechanism is placed concentrically with respect to the joint fixing member 6 to which a seal ring 7 such as a V ring or an O ring is attached and arranged in advance, and a predetermined load is applied from above as shown by the arrow. Press.

Due to this pressurization, the tongue portion 8 of the joint body 9 comes into contact with the opening of the annular groove 5 of the joint fixing member 6, which opens toward the joint body 9 and diagonally outward with respect to the rotation axis. , plastically deforms according to the annular groove 5,
The joint body 9 and the joint fixing member 6 can be connected while remaining rotatable by fitting with a predetermined gap left.

FIG. 3 is a partial vertical sectional side view showing a second embodiment of the pipe joint 20 according to this invention.

In this pipe joint 20, the annular groove and the tongue portion for connecting the joint body and the joint fixing member are provided in the opposite way to the pipe joint 1 in the embodiment shown in FIG. , and the annular groove 22
The joint fixing member 23 is provided with a tongue piece 24 that engages with the joint fixing member 23.

4 and 5 are sectional views of main parts in another embodiment, and in the embodiment of FIG. 4, only a tongue portion 32 is provided on the end surface of the joint body 31, unlike the first embodiment, It engages with an annular groove 34 formed in the joint fixing member 33. In this case, the tongue piece 3
2 does not necessarily have to be provided on the inner peripheral surface side of the end face of the joint body 31, and may be provided on any part of the end face as long as it is concentric with the rotation axis.

Moreover, the pipe joint of the embodiment shown in FIG. 5 is opposite to the connection structure of the pipe joint shown in FIGS. 1 to 4,
The joint body 41 is inserted into the joint fixing member 42,
In this case, the tongue portion 43 is provided on the joint body 41,
An annular groove 44 that engages with the tongue portion 41 is formed in the joint fixing member 42.

In addition, in the embodiments shown in FIGS. 1 to 3, a case has been described in which an L-shaped joint body is used, but of course the joint body is not limited to an L-shape.
It can be of any shape, such as T-shape or straight, and the joint body may be one with a connection mechanism for hydraulic or pneumatic applications, one with a flow rate control mechanism, or one with various other uses. be able to.

Furthermore, in any of the above embodiments, the annular groove formed diagonally with respect to the rotation axis is provided so that the opening of the annular groove faces outward, that is, in a direction away from the rotation axis. However, of course, it may be formed so as to face inward, and the tongue portions that engage with the annular groove may be annular or provided at predetermined intervals.

[Effect of idea]

As explained above, according to this invention, a joint fixing member having a threaded portion and a nut portion, and a joint body rotatably connected to the joint fixing member and having a connection mechanism with a pipe are provided. In the pipe joint, the joint fixing member and the joint body have an annular groove provided on one of them and formed obliquely with respect to the rotation axis, and a tongue provided on the other side and fitted into the annular groove. By configuring a pipe joint that is rotatably locked by one piece, it is possible to connect the joint body and the joint fixing member without using special assembly jigs, and the number of parts is small. , manufacturing costs can be significantly reduced compared to pipe fittings with a conventional swivel structure. Furthermore, it is possible to shorten the dimensions of the pipe joint.

Note that this invention is not limited to the above-mentioned embodiments, and the shape of the seal ring and its location, the position of the annular groove and the tongue piece, the type of mounting screw for the joint fixing member, etc. are based on the technical concept of this invention. It is possible to make various changes within.

[Brief explanation of the drawing]

Fig. 1 is a new vertical cross-sectional side view of the pipe joint according to this invention, Fig. 2 is an explanatory diagram when assembling the pipe joint of the embodiment shown in Fig. 1, and Fig. 3 is another embodiment of the pipe joint according to this invention. FIGS. 4 and 5 are longitudinal sectional views of main parts of other embodiments. 1, 20: Pipe joint, 2: Nut part, 3: Male thread part, 4: Seal ring receiving annular groove, 5, 22, 3
4, 44: Annular groove, 6, 23, 33, 42: Joint fixing member, 7: Seal ring, 8, 24, 3
2, 43: Tongue piece portion, 9, 21, 31, 41: Joint body.

Claims (1)

[Scope of utility model registration request] A pipe joint having a joint fixing member having a threaded portion and a nut portion, and a joint body rotatably connected to the joint fixing member and having a connection mechanism with a pipe, wherein the joint fixing member and The joint body is rotatably locked by an annular groove provided on one side and formed diagonally with respect to the rotation axis, and a tongue piece provided on the other side and fitted into the annular groove. A pipe fitting characterized by: