JPH022156Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a hose joint that prevents the inserted hose from twisting when the hose inserted into the main body of the hose joint is fixed by tightening a cap nut.

For hoses that are connected to the drive source of air tools such as air drivers and impact wrenches, by tightening the cap nut fitted into the hose insertion part of the hose joint, the hose is held in the centripetal direction by the inner circumferential surface of the cap nut. It is configured to be attached.

However, when conventional hose joints are used, when the cap nut is tightened, the inner circumferential surface of the cap nut rotates while pressing against the surface of the hose, causing the hose to rotate together with the cap nut, causing the hose to become twisted. However, there is a problem that the inner circumferential surface of the hose gets rubbed, which can interfere with work when returning a twisted hose to its original state, and if the hose gets rubbed, it can crack during use and cause the fluid to leak. A situation occurred that caused a leak.

The purpose of this invention is to provide a hose joint that does not twist the hose even when the cap nut is tightened when connecting the hose, in view of the fact that conventional hose joints had the above-mentioned drawbacks. Its gist is that a male threaded portion into which a cap nut is screwed is rotatably provided with respect to the main body of the hose joint.

This invention will be described in detail below based on embodiments shown in the drawings.

In the drawings, reference numeral 1 mainly consists of a hose fitting that has a hose fitting part (hose nipple) 2 at one end and a connection part 3 for connecting to another joint at the other end. When the socket is a socket (not shown), it takes the form of a well-known plug and has a circumferential groove that engages and disengages from a locking ball provided in the socket.

Reference numeral 11 denotes a synthetic resin cap nut that is screwed onto a tightening body 4, which will be described later, and has a hose fitting, which will be described later, that presses the outer surface of the hose 12 attached to the hose insertion part 2 of the hose joint main body 1 on its inner circumferential surface. A stop portion 15 is provided. As is clear from the drawings, the length of the female threaded portion 16 provided on the inner circumferential surface of the cap nut 11 is longer than that of the male threaded portion 5, which will be described later.
A cylindrical hole 13 having a diameter smaller than that of the threaded portion 16 is provided adjacent to the threaded portion 16 . Female thread part 1
6 and the cylindrical hole 13 have a hose insertion part 2 at the boundary step.
A single line of hose locking part 15 is provided in the inner circumferential direction, facing the hose 12 and appropriately biting into the outer surface of the hose 12.

The tightening body 4 is made of synthetic resin, has a male threaded part 5 that screws into the female threaded part 16 of the cap nut 11, and a hexagonal nut-shaped part 10 having a larger diameter than the male threaded part 5, and is used as a hose joint. It is rotatably fitted to the outer periphery of the central portion of the main body 1. 8 is a circumferential groove formed on the outer periphery of the central part of the hose joint main body 1;
The end face of the hose 12 to be inserted into the hose insertion part 2 of the hose joint main body 1 and the hose insertion part 2 of the tightening body 4
An opposing stop ring 6 is fitted onto the end face 7 facing the front side. An end face 7 of the clamping body comes into contact with the stop ring 6 to prevent the clamping body 4 from coming off toward the hose connection section. Reference numeral 9 denotes a stepped portion formed on the outer circumferential surface of the hose joint body 1 in order to abut the end face of the nut portion 10 of the clamp body 4 and prevent the clamp body 4 from slipping out toward the socket connection portion side of the hose joint body 1. be.

Reference numeral 17 denotes a tapered part called a bamboo shoot provided in the hose insertion part 2 of the main body 1 of the hose joint. The hose locking portion 15 is formed by continuously forming two tapered surface portions forming a diameter, and a stepped portion formed at the boundary between the two tapered surface portions of the tapered portion 17 presses the outer surface of the hose 12. It is configured as a hose locking part 14 that presses the inner surface of the hose 12 that is paired with the hose.
4 face each other from the centrifugal direction at a close position and bite into the inner and outer surfaces of the hose 12 moderately, and the hose 12
It is designed to be clamped and locked from the wall thickness direction.

Next, the operation of the above embodiment will be explained.

When connecting the hose 12 to this hose joint, first remove the cap nut 11 from the hose joint main body 1, then pass the hose 12 through the cylindrical hole 13 of the cap nut 11, and insert the tip of the hose 12 into the hose insertion part 1.
and screw the cap nut 11 onto the tightening body 4. Since the clamping body 4 is rotatably fitted to the plug body 1, initially you may grasp the clamping body 4 and turn the cap nut 11 in the tightening direction, but if the hose locking part 15 After approaching the hose locking part 14 of the joint main body 1, the cap nut 11 side is fixed, and when the tightening body 4 is rotated in the tightening direction of the cap nut 11, the cap nut 11 is moved to the hose joint main body 1 side. approaches the hose locking portion 14 of the hose, and eventually both locking portions 14,
5 come to face each other from the centrifugal direction (closest state). Therefore, when the tightening body 4 is further rotated, the hose locking part 15 on the cap nut 11 side moves too far away from the hose locking part 14 on the hose joint main body 1 side, and in the most tightened state, they face each other as shown in the figure. In this tightening process, the cap nut 11 moves along the surface of the hose 12 in the longitudinal direction as described above.
Since it does not rotate on the surface of the bag nut 11
To firmly clamp a hose 12 with a hose locking part 15 without damaging the outer surface of the hose 12.
Moreover, since the hose 12 is not twisted when the clamping body 4 is rotated, the hose 12 is connected under pressure without being twisted at all. Furthermore, even if the hose is tightened by turning only the cap nut 11 without turning the tightening body 4, the main body of the hose joint rotates together with the hose and the cap nut, so the hose will not be twisted. The hose will not be rubbed by the cylindrical hole of the cap nut.

The invention has been explained above based on the examples, and the hose joint of this invention has a hose insertion part (hose nipple) at one end and a cap nut that compresses the hose inserted in the part in the centripetal direction. In a hose joint that has a connection part with another joint at the other end, a male threaded part, which is the threaded part of the cap nut, is provided on the outer peripheral surface of a tightening body formed separately from the main body of the hose joint. , the tightening body of the cap nut is rotatably screwed between a step provided in the center of the main body of the hose joint and a stop ring, and a circumferential direction is attached to the inner surface of the cap nut screwed onto the male threaded portion. The inserted hose is compressed facing each other from the centrifugal direction by a single line of hose locking part formed on the outer surface of the hose insertion part and a single line of hose locking part formed in the circumferential direction on the outer surface of the hose insertion part. Because of this structure, there is an effect that the hose fitted into the hose insertion part will not be twisted when tightening the cap nut. Moreover, when the clamping body is held down, the main body of the hose joint and the cap nut will rotate together due to the friction of the inserted hose, so the hose will not be rubbed by the cylindrical hole of the cap nut, and the hose will not be rubbed. It also has the effect of not damaging the surface. In addition, since the tightening body with a male thread is located between the step and the stop ring and is rotatably fitted onto the main body of the hose joint, the rotation of the tightening body is smooth and the above-mentioned twisting is prevented. The effect can be further enhanced.

[Brief explanation of the drawing]

The drawing is a longitudinal side view showing an example of this invention. 1... Hose joint main body, 2... Hose insertion part,
4...Tightening body, 5...Male thread part, 6...Stop spring, 9...Step part, 11...Cap nut, 12...
... Hose, 13... Cylindrical hole, 14, 15... Hose locking part.

Claims (1)

[Scope of utility model registration request] A hose insertion part is provided at one end of the main body of the hose joint, and a cap nut is screwed into the male screw part provided adjacent to the hose insertion part, and the hose inserted into the hose insertion part is inserted into the cap nut. In a type of hose joint that is held down by the inner circumferential surface of the cap nut and the outer circumferential surface of the hose insertion part, the inner circumferential surface of the cap nut has a hose outer surface adjacent to the female threaded part that has a diameter smaller than the diameter of the same threaded part. A cylindrical hole for pressing is provided, and a single hose locking portion is provided in the circumferential direction at the boundary between the female threaded portion and the cylindrical hole, facing the hose insertion portion of the main hose joint, On the other hand, on the outer periphery of the central portion of the main body of the hose joint, a tightening body having the male threaded portion on the outer periphery for screwing the cap nut is rotatably fitted, and
A stop ring is fitted into a cylindrical groove located between the end face of the hose to be inserted into the hose insertion part and the end face of the clamping body, and the hose insertion part of the main body of the hose fitting is further fitted with the stop ring. A tapered portion that becomes larger in diameter as it approaches the male threaded portion of the tightening body is provided to face the hose locking portion of the cap nut, and when the cap nut is tightened, the hose locking portion provided on the nut side is provided. A hose locking portion facing the stop portion is provided in the circumferential direction, and the hose locking portion on the cap nut side and the hose locking portion on the main body side of the hose joint are provided on the inner and outer surfaces of the inserted hose. A hose joint that locks the hose with clamping pressure in the wall thickness direction.