JP2518399Y2 - Simple swivel hose fitting and hose with fitting - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose joint for connecting a hose to various devices, and more particularly, to a swivel hose joint for rotatably connecting a hose to a mating member and a hose with a joint.

[0002]

2. Description of the Related Art When connecting a rubber hose or a synthetic resin hose to various devices, a connecting fitting having a threaded portion is fixed to one end of the hose, and the threaded portion of the connecting fitting is screwed to a mating member such as a manifold on the equipment side. The method of screwing to the part is common. However, in this method, when the connection fitting is rotated to screw the connection fitting fixed to one end of the hose into the mating member, the hose fixed to the connection fitting is necessarily rotated. Therefore, in this method, if one end of the hose whose other end is already fixed by joining is to be connected to the mating member,
There was a big drawback that the hose rotated when the fitting was screwed and the hose was twisted while being piped.

Further, as a simple hose joint, the actual open sho 62
As described in JP-20290A, JP 61-166291A, etc., an annular convex portion is provided on the outer periphery of one end of the joint body, and the outer periphery of one end of the joint body is engaged with the convex portion. Some have a cap nut attached. But,
In this type of hose joint, a seal member such as an O-ring is arranged on the side surface of the convex portion on the side of the mating member, and the mating member screwed into the cap nut sandwiches and presses the seal member between the convex portion, It is designed to ensure sealing performance. Therefore, when the cap nut is screwed into the mating member, the joint body easily rotates together, and further, after the connection, the joint body and the hose fixed thereto cannot rotate with respect to the mating member. As described above, the conventional hose joint of this type is not a swivel joint, and is easily connected while the hose is twisted, and when the joint body has a curved portion, it is difficult to connect the direction as instructed.

Further, in the hose joint described in Japanese Utility Model Laid-Open No. 58-91091, as shown in FIG. 2, a sleeve nut 2 having an internal thread at one end is attached to the outer periphery of one end of a tubular joint body 3. It is fitted in the formed annular groove so as to be rotatable in the circumferential direction, and the other end of this joint body 3 is
After being inserted into the end, the outer periphery of the hose 1 and the joint body 3 is tightened and fixed by the socket 4. The adapter 5 is provided with male threads at both ends, and the male thread of one taper thread is screwed into the female thread (not shown) of the taper thread of the device side connection port, which is the mating member, so that the mating member can be sealed. Keep it fixed. The hose 1 is connected by rotating and screwing the sleeve nut 2 into the other male screw of the adapter 5 fixed to this mating member.

Since this conventional hose joint requires a dedicated adapter 5 in addition to the union nut or the sleeve nut 2, the number of parts is large, and the female screw of the union nut or the sleeve nut 2 and a screw for the female screw of the union nut or the sleeve nut 2 are required. Since the male screw of the adapter 5 to be fitted is not a taper screw which is usually used when a sealing property is required, but a special screw is used, the cost becomes very high. Further, since the sealability between the union nut or the sleeve nut 2 and the adapter 5 is not good, one end of the joint body 3 and the other end of the adapter 5 are tapered to be in pressure contact with each other to ensure the sealability.

However, this hose joint is not a so-called swivel joint, since the joint body 3 is pressed against the adapter 5 and the sleeve nut 2 to make it impossible to rotate after connecting to the mating member. Therefore, when the union nut or the sleeve nut 2 is screwed at the time of connecting the hose, the joint body 3 comes into contact with the adapter 5. Therefore, at the final point of screwing, the joint body 3 rotates together with the sleeve nut 2. As a result, the hose 1 is twisted. Therefore, the hose may be damaged if it is used as it is. Further, when the joint body has a curved portion, it is difficult to establish the directionality and connect the joint.

On the other hand, the swivel joint is known as a rotatable joint, and is, for example, Japanese Utility Model Publication 61-1478.
Japanese Patent No. 6 discloses a swivel hose joint that allows the joint body to be rotatably connected to a mating member. In this swivel hose joint, the joint body should be equipped with a hose at one end and a socket with a threaded portion on the opposite side, and multiple balls should be arranged in the groove provided on the outer periphery of the joint body and the inner periphery of the socket. Thus, the joint body is rotatable with respect to the socket. Further, even if the socket is screwed to the mating member, the joint body does not come into contact with the mating member, so that the joint body can be rotatably connected to the mating member. However, since the conventional swivel hose joint is provided with a group of balls as described above, the structure is extremely complicated, and the structure becomes large in the axial direction and the radial direction. Moreover, it is not easy to assemble the joint, and the disassembly of the joint is not easy. It has been extremely difficult to replace a seal member such as an O-ring that has been damaged due to long-term use.

[0008]

In view of such conventional circumstances, the present invention has a small number of parts, is compact and inexpensive, and can be easily connected without twisting the hose when connecting the hose, and even after the connection. To provide a simple swivel hose joint in which a joint body having a hose fixed therein is rotatable, has excellent sealing properties, and a seal member can be easily replaced, and a hose with a joint using this joint. With the goal.

[0009]

In order to achieve the above object, a simple swivel hose joint provided by the present invention is a swivel hose joint that rotatably connects a hose to a mating member: a straight portion at one end. And a tubular joint body having an annular convex portion projecting in the radial direction on the outer circumference of one end and the other end forming the fitting portion of the hose: a screw with a mating member on the outer circumference or inner circumference of the one end It has a through threaded central hole with a large diameter part whose inner diameter on one end side is larger than the outer diameter of the annular convex part of the joint body and whose inner diameter on the other end side is smaller than the outer diameter of the annular convex part. And a cylindrical threaded member in which the straight portion of the joint body is inserted into a through center hole in which the large diameter portion is directed to one end side; both sides provided on the outer peripheral surface of the annular convex portion of the joint body. Is housed in a circumferential groove that forms a standing wall, and the annular protrusion of the joint body An annular seal member that seals between the outer peripheral field and the inner peripheral surface of the screwing member, and is exposed when the screwing member moves the straight portion of the joint body to the other end side in the axial direction; And a locking member that is detachably attached to the outer periphery of the straight portion and that restricts the movement of the screwing member toward the other end in the axial direction in the state where the annular convex portion of the joint body is housed in the large diameter portion. To do.

The screwing member may be a bolt-shaped member having a male screw portion on the outer circumference on the one end side or a nut-shaped member having a female screw member on the inner circumference on the one end side. In order to make it more compact, it is often desirable to use a bolt-shaped member having a male screw member on the outer circumference on the one end side.

The hose with a joint provided by the present invention is a hose with a joint that can be rotatably connected to a mating member; the above-mentioned simple swivel hose joint and the hose of the joint body in the simple swivel hose joint. The hose has one end inserted into the fitting portion and securely fixed to the hose fitting portion.

[0012]

[Operation] In the simple swivel hose joint of the present invention,
The joint body inserted into the through-hole of the threaded member is rotatable with respect to the threaded member, and the threaded member is provided movably in the axial direction at one end of the threaded body. The annular projection provided at one end abuts on the step between the large diameter portion of the screwing member and the through center hole, so that the screwing member cannot be detached to the outside of the one end side of the joint body. in addition,
Since the annular seal member mounted between the screwing member and the joint body is arranged in the circumferential groove provided in the annular convex portion of the joint body, it does not hinder the rotation of the screwing member.

As a result, even when the mating member is screwed onto the mating member, the joint body is separated from the mating member and is rotatably held with respect to the mating member. Therefore, when the threaded member is screwed into the mating member to be connected, the hose fixed to the joint body is not twisted, and the joint body is rotatable with respect to the threaded member even after the connection. In addition, the annular seal member arranged on the annular convex portion can ensure sufficient sealing performance, and the annular convex portion also serves as the sealing portion, so that the length of the swivel hose joint can be reduced accordingly.

By attaching the locking member to the outer periphery of one end of the joint body in contact with or close to the other end of the threaded member, the threaded member is directed toward the other end along the axis of the joint body. It is possible to keep the annular convex portion of the joint main body completely accommodated in the large diameter portion of the screwing member by restricting the movement of the joint main body. Therefore,
By attaching the locking member to the joint body, the movement of the screwing member is prevented so that the annular seal member in the circumferential groove on the outer periphery of the annular convex portion is not exposed not only when connected to the mating member but also during transportation. be able to.

Further, since the locking member can be removed from the outer peripheral portion of the joint body, if the annular seal member deteriorates due to long-term use, after removing the locking member, the screwing member is rotated to remove it from the mating member. The annular seal member is exposed by detaching it and moving it toward the hose side, so that the annular seal member can be easily replaced. The joint body may be straight tubular or may have a curved portion in the middle, but the threaded member engaged with the outer periphery of one end of the joint body is the other end (hose side).
At least one end of the fitting body must be substantially straight so that the annular seal member can be moved toward and exposed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of the simple swivel hose joint and the hose with a joint of the present invention, and a method of connecting the mating member to the mating member will be described with reference to FIG. This simple swivel hose joint includes a substantially cylindrical joint body 6 made of metal such as stainless steel, a cylindrical screw member 9 having a male screw 11 on the outer periphery of one end, and an annular seal member such as an O-ring. 12 and a locking member 15. The joint body 6 has a first end portion at one end and a second end portion at the other end, and the first end portion has a straight portion 7 and a straight portion 7 extending straight.
A ring-shaped convex portion 7a provided on the outer periphery of the tip end portion of the hose 1 and protruding in the radial direction, and a second end portion thereof is a hose fitting portion 8 into which the end portion of the hose 1 can be inserted.

The screwing member 9 is also a substantially cylindrical body made of metal such as stainless steel, and has a through center hole 10 penetrating the center thereof in the axial direction, and the joint body 6 is fitted in the through center hole 10 as described later. Straight city 7 is inserted. A large diameter portion 10a capable of accommodating the annular convex portion 7a of the joint body 6 is formed at one end side of the through center hole 10, and a small diameter portion 10b having a smaller diameter than the outer circumference of the annular convex portion 7a is formed at the other end side. Therefore, a step is formed between the large diameter portion 10a and the small diameter portion 10b. Further, on the outer periphery of the screw member 9, a male screw 11 of a tapered screw is provided on one end side. Needless to say, the threaded portion of the screwing member 9 may be a female thread formed on the inner circumference corresponding to the threaded portion of the mating member such as the device side connection port.

The large diameter portion 10a of the screwing member 9 is directed to one end side, and the straight portion 7 of the joint body 6 is inserted in the through center hole 10 thereof.
Is inserted so as to be rotatable in the circumferential direction and movable in the axial direction. The step between the small diameter portion 10b and the large diameter portion 10a of the through center hole 10 of the threaded member 9 abuts the annular convex portion 7a, and this step cannot move to the one end side of the joint body 6 beyond the annular convex portion 7a. The screwing member 9 cannot be removed from the one end side of the joint body 6. At the position where the screwing member 9 can no longer move to the one end side, the annular convex portion 7a of the joint body 6 is completely accommodated in the large diameter portion 10a of the screwing member 9.

In order to seal between the screwing member 9 and the joint body 6, a circumferential groove 7b is formed on the outer peripheral surface of the annular convex portion 7a of the joint body 6.
Of the large diameter portion 10a of the screwing member 9 by accommodating an annular seal member 12 such as an O-ring for movement made of NBR or the like in the circumferential groove 7b. It is arranged so as to come into pressure contact with the inner peripheral surface. Thus, the annular seal member 12 seals between the outer peripheral surface of the annular convex portion 7a of the joint body 6 and the inner peripheral surface of the large diameter portion 10a of the screwing member 9, and is provided on the annular convex portion 7a. Since it is housed in the circumferential groove 7b which forms a wall of which both sides are erected, the seal member 12 does not contact the mating member even when the mating member 9 is screwed to the mating member. Therefore, in this simple swivel hose joint, free rotation of the joint body 6 is guaranteed even after the connection to the mating member.

The simple swivel hose joint of the present invention in which the screwing member 9 is inserted into the joint body 6 as described above is the joint body 6
Insert the hose 1 on the outer periphery of the hose fitting portion 8 at the other end of
In order to prevent the hose 1 from coming off, a portion where the hose end 1a and the joint body 6 overlap with each other is covered with an annular tightening member such as a socket 13 from the outer circumference of the hose end 1a as usual, and the hose 1 is fastened and fixed. . In order to prevent the hose 1 from coming off, a plurality of grooves 14 may be preferably formed in the outer circumference of the hose fitting portion 8 of the joint body 6 in the circumferential direction to increase the frictional resistance with the hose 1.

As described above, in the hose with a joint in which the hose 1 is connected and fixed to the simple swivel hose joint of the present invention, when the screw member 9 is screwed to the mating member thereafter, the joint body 6 is attached to the screw member 9. Is rotatable, the hose 1 can be attached to the mating member without twisting. Moreover,
The locking member 15 such as a locking pin or a locking ring is attached to the screwing member 9
Of the fitting main body 6 is brought into contact with or close to the contact portion on the other end side of the joint body 6 and fixed to the locking recess formed in the straight portion 7 of the joint body 6, so that the screwing member 9 is moved toward the other end side in the axial direction. Movement is stopped.

In this state, the seal member 12 is screwed into the screw member 9.
The large diameter portion 10a of the screwing member 9 is housed in the large diameter portion 10a of the
The inner peripheral surface of a and the outer peripheral surface of the annular convex portion 7a of the joint body 6 are sealed, and the joint body 6 and the seal member 12 do not abut against the mating member even after connection. Therefore, since the joint body 6 can be rotated with respect to the screwing member 9 in the state where the locking member 15 is fixed, the joint body 6 can follow the force of twisting the hose 1 during use. The hose 1 will not rotate and will not be unduly twisted.

Further, if the locking member 15 is pulled out, the screwing member 9 can be removed from the mating member and moved along the straight portion 7 of the joint body 6 to the hose 1 side. The exposed annular seal member 12 can be easily replaced. Therefore, when the threaded member 9 is moved toward the hose fitting portion 8 on the other end side in the direction away from the annular convex portion 7a, at least the annular seal member 12 is screwed in the straight portion 7 of the joint main body 6. It goes without saying that it is necessary to extend long until it is exposed from the large diameter portion 10a of the coupling member 9.

As described above, the simple swivel hose joint of the present invention and the hose connection structure using the same have a simple structure with a small number of parts and can be easily assembled by screwing the screwing member 9 to the mating member. The hose 1 can be rotatably connected. Further, as described above, since the joint body 6 can always rotate freely with respect to the screwing member 9, the screwing member 9 is used for screwing.
The joint body 6 and the hose 1 connected to the joint body 6 will not be twisted even if is turned. Even when the hose 1 is twisted during use by being connected to the mating member, the joint body 6 can be rotated with respect to the screwing member 9 fixed to the mating member, so that the joint body 6 is not twisted. By following the rotation, the hose 1 is not unnecessarily twisted, and damage to the hose due to the twist can be suppressed.

There is a slight gap between the joint body 6 and the screw member 9 so that the screw member 9 can rotate, but an O-ring for movement is provided between the joint body 6 and the screw member 9. Since the annular sealing member 12 such as the above is arranged, oil or other fluid does not leak out. That is, since the screwing member 9 connected to the mating member is restricted from moving in the axial direction by the locking member 15, the annular seal member 12 is not exposed from the screwing member 9 and the joint main body 6 is not exposed. A reliable sealing property can be always ensured with the screw member 9. Furthermore, since a taper screw can be used for the male screw 11 or the female screw of the screwing member 9 in accordance with the mating member, excellent sealability with the mating member is also ensured.

When the hose 1 is used while flowing oil or other fluid, the annular seal member 12 such as an O-ring is deteriorated and the sealing performance is impaired. In this case, in the simple swivel hose joint and the hose with a joint of the present invention, the screwing member 9 can be moved toward the other end in the axial direction by removing the locking member 15. And move it toward the hose 1 side to easily replace the deteriorated O-ring or other annular seal member 12 with a new one.
It is possible to reconnect to the mating member again.

[0027]

[Effects of the Invention] The simple swivel hose joint of the present invention and the hose with a joint using the same have fewer components and a simpler structure and are less expensive than conventional swivel hose joints using a ball group. At the same time, the hose can be connected easily and with good sealing property without twisting when connecting to the mating member. Moreover, since the joint body can be freely rotated with respect to the threaded member even after the threaded member is screwed onto the mating member, the hose is not unduly twisted during use.

In addition, since the movement of the screwing member is restricted by the locking member and the annular seal member is housed in the large diameter portion of the screwing member, the annular seal member is prevented from being damaged during use and is being used. Can ensure the sealing performance of the annular sealing member. On the other hand, by removing the locking member, it becomes possible to move the screwing member toward the other end side until the annular seal member is exposed, so that the deteriorated annular seal member can be replaced very easily. It is possible to reconnect to the mating member in a short time.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a specific example of the simple swivel hose joint of the present invention.

FIG. 2 is a sectional view showing a specific example of a conventional hose joint.

[Explanation of symbols]

 1 Hose 1a Hose end 2 Sleeve nut 3 Sleeve 4 Socket 5 Adapter 6 Joint body 7 Straight part 7a Annular convex part 7b Circumferential groove 8 Hose fitting part 9 Screwing member 10 Through center hole 10a Large diameter part 10b Small diameter part 11 Male Screw 12 Annular seal member 13 Socket 14 Groove 15 Locking member

Claims (3)

(57) [Scope of utility model registration request] 1. A swivel hose joint for rotatably connecting a hose to a mating member, wherein a straight portion is provided at one end, and an annular convex portion protruding in the radial direction is provided on the outer circumference of the one end, and the other end is provided. A tubular joint body that forms the fitting portion of the hose; a screw thread for screwing with a mating member is provided on the outer or inner periphery of one end, and the inner diameter on one end side is larger than the outer diameter of the annular convex portion of the joint body A large diameter portion and a small diameter portion whose inner diameter on the other end side is smaller than the outer diameter of the annular convex portion is formed, and a straight center of the joint body is formed in the large diameter portion toward the one end side. A tubular threaded material having a portion inserted therethrough; accommodated in a circumferential groove formed on the outer peripheral surface of the annular convex portion of the joint body, the sides of which are upright, and the outer peripheral surface of the annular convex portion of the joint body. And the inner peripheral surface of the screwing member are sealed, and the screwing member is a straight member of the joint body. An annular seal member exposed by moving the portion to the other end in the axial direction; detachably attached to the outer periphery of the straight portion of the joint body, and screwed with the annular convex portion of the joint body housed in the large diameter portion. A simple swivel hose joint comprising: a locking member that restricts movement of the member toward the other end in the axial direction. 2. The simple swivel hose joint according to claim 1, and one end of the simple swivel hose joint is fitted into a fitting portion of a hose of a joint body of the simple swivel hose joint, and is securely fixed to the hose fitting portion. Hose with a joint consisting of a hose. 3. A swivel hose coupling for rotatably connecting a hose to a mating member, the swivel hose coupling extending along an axis and having a first end at one end and a second end at the other end. One end portion is composed of a straight portion that extends straight and an annular convex portion that is provided on the outer periphery of the tip portion of the straight portion and that protrudes in the radial direction. The second end portion can be inserted with the hose end portion of the hose. A tubular joint body that forms a hose fitting portion formed on the inner surface of the tubular joint body; and a cylindrical through hole that is concentrically arranged with the first end portion of the tubular joint body and is concentric with the first end portion. While having a large-diameter portion in which the inner diameter on one end side of the through center hole is larger than the outer diameter of the annular convex portion, the inner diameter on the other end side is smaller than the outer diameter of the annular convex portion and is relative to the outer periphery of the straight portion. Provided with a small diameter portion that is inserted so as to be rotatable in the circumferential direction and movable in the axial direction, and has an outer periphery on the one end side or the large diameter portion. A tubular screwing member having a threaded portion for screwing onto the mating member on the inner peripheral surface thereof; and an annular convex portion of the tubular joint body having a circumferential groove on the outer circumference, An annular seal member which is housed in the annular convex portion and seals between the outer peripheral surface of the annular convex portion and the inner peripheral surface of the large diameter portion of the screwing member; Removable in the locking recess formed in the straight part, facing or in contact with the contact part formed on the other end side of the screw member for holding it in the diameter part And a locking member attached to the locking member, the locking member being detached from the locking recess, and the screwing member having at least an annular shape when moved relative to the joint body in a direction away from the annular projection. A simple swivel characterized in that the rear portion of the straight portion extends until the seal member is exposed from the large diameter portion. Hose fittings.