JP2880968B2 - Hose fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose joint for connecting a hose by inserting a nipple into the hose and fitting the hose to the hose.

[0002]

2. Description of the Related Art Conventionally, there have been the following hose joints. The joint comprises at least one of the hose reinforcements.
Packing covering the pitch or more is provided on the nipple,
A sleeve which is wound around the outside of the hose and presses at least one pitch of the reinforcing member in correspondence with the packing, and has at least one or more cuts in the circumferential direction; and a portion which comes into contact with the outer surface of the sleeve is tapered. It consists of a hose nut that is screwed into the joint body that is the surface.
No.).

[0003]

By the way, in the hose joint according to the conventional example, the gap between the inserted hose and the nipple is filled by fitting a detachable packing on the outer peripheral surface of the nipple. To prevent leaks. However, since the conventional packing is detachable, when the hose is attached or detached, there is a possibility that the packing may fall off or the packing may be displaced from the minimum inner diameter portion of the sleeve, so that it may not be possible to properly secure the sealing property. Also, in the case of a hose with a spiral reinforcement, a spiral uneven strip may appear on the outer or inner surface of the hose, and in order to improve the sealing property, it is necessary to use an adhesive such as an elastic material that adheres to the shape. It is necessary to form the nipple using a highly flexible member. However, when the entire nipple portion is formed only with such a member, not only the rigidity is impaired, but also the nipple portion itself is crushed, and there is a problem that the sealability may be impaired.

Accordingly, the present invention has been made firstly for the purpose of providing an improved hose coupling. The second purpose is to provide a reliable hose joint in which the packing does not come off when the hose is attached or detached. Third
The purpose of the present invention is to provide an easy-to-handle hose coupling that does not require adjustment of the packing position. Fourth, the object is to fill a gap between the nipple portion and the hose to provide a hose joint having high watertightness (sealability). Fifth, the present invention provides a rigid hose joint that does not collapse the nipple portion when inserting the hose.

[0006] Sixth, the present invention provides an inexpensive and economical hose coupling with a simple structure and a low production cost. Seventh, it is to provide a hose joint having a long device life without damaging a hose or a nipple portion. Eighth, an object of the present invention is to provide a hose joint which is easy to fit a hose and has good usability.

[0006]

According to a first aspect of the present invention, a nipple formed by an elastic body which projects from a base formed on a joint body, is inserted into a hose, and is attached to a hose, is screwed to the base. It has a hose nut for tightening a hose between the nipple and a non-flexible reinforcing cylinder provided inside the nipple and for preventing the nipple from reducing in diameter.

Here, there are various types of "hoses" such as those with or without a reinforcing body. The reinforcing member is not necessarily limited to one type, and may be two or more types. The reinforcing member is formed of, for example, a flexible material such as metal or synthetic resin. Further, the reinforcing body may be not only a wire but also a band. "Nipple part made of elastic body"
Because the nipple part made of an elastic body has a greater sliding resistance in the axial direction between the hose and the nipple part than the nipple part made of hard material, Because it is hard to come off. Regarding the shape of the “nipple portion”, not only a cylindrical shape but also a tapered tapered surface may be provided on the outer peripheral surface so that the nipple portion can be easily inserted into the hose and hardly fall off.

[0008] As the shape of the "hose nut", a tapered surface may be provided on the inner peripheral surface so that it comes into contact with the hose or sleeve to be effectively tightened. The reinforcing cylinder is provided in a place where the diameter reduction of the nipple part can be effectively prevented, for example, when a hose nut is screwed into the base and the hose is tightened between the nipple part, The area where the hose nut and the nipple are closest, for example,
If there is a sleeve, it is a hose insertable region including a region where the minimum inner diameter portion of the sleeve and the nipple portion are closest to each other. Further, a reinforcing cylinder may be provided over the entire nipple portion.

The phrase "the reinforcing cylinder is provided inside the nipple portion" means that the reinforcing cylinder may be provided along the inner surface of the nipple portion or may be embedded inside. In the case of embedding, the case is not limited to the case where the reinforcing tube is completely buried and does not appear on the surface, but may be the case where a part of the reinforcing tube appears. For example, by matching the inner diameter of the reinforcing cylinder and the inner diameter of the nipple,
There is a case where the reinforcing cylinder is buried so as to expose the inner surface thereof. Further, the reinforcing cylinder may be formed integrally with the base. The “inflexible reinforcing cylinder” is formed so as not to bend, bend, or bend by, for example, a synthetic resin or metal.

According to the present invention, the nipple portion formed of the elastic body increases the sliding resistance between the hose and the nipple in the axial direction, prevents the hose from slipping, and does not easily come off. And a hose joint having a high height can be provided. Further, according to the present invention, the nipple portion formed of the elastic body can be in close contact with the inner surface of the hose to improve the sealing property, and the inflexible reinforcing cylinder is provided in the nipple portion. Thus, it is possible to provide a hose joint that satisfies both sealing performance and rigidity by preventing the nipple portion from being crushed. Further, according to the present invention, the nipple portion formed of the elastic body is a conventional nipple (actual example 2-3).
Since there is no need to use a packing as in the case of US Pat. No. 1,674, the packing does not come off when the hose is attached or detached.

According to a second aspect, in the first aspect, a spiral ridge is provided on an outer peripheral surface of the nipple portion. According to the present invention, in addition to the effects of the first invention,
Since the sliding resistance in the axial direction can be further increased, the hose can be more effectively prevented from falling off. In addition, a high sealing property can be realized between the hose and the hose.

According to a third aspect of the present invention, in the first or second aspect, the hose joint has a sleeve formed with a cut along an axial direction from a tip end and a tip end portion of which can be reduced in diameter. The inner peripheral surface of the nut comes into contact with the sleeve, the sleeve is reduced in diameter, and the hose is tightened.

Here, the "sleeve" is not limited to the case where it is integrated with the joint base, but may be the case where it is provided separately from the joint base. According to the present invention, by providing the sleeve, the hose fitted to the nipple portion formed of the elastic body is pressed by the sleeve, and the nipple portion is in close contact with the inner wall surface of the hose, and high sealing performance and high sliding Resistance can be obtained. This makes it possible to prevent the hose from dropping off more effectively, and it is easy to handle the elastic portion (corresponding to the packing) of the nipple portion by detachment of the hose without detachment.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the invention, the nipple portion is formed in a tapered shape having an outer diameter gradually narrowing in a protruding direction. is there. Here, the “outer diameter that gradually narrows” may be, for example, a tapered shape having a diameter that is larger than the inner diameter of the hose and smaller than the inner diameter of the hose in the protruding direction. This makes it possible to provide a hose joint that can be easily inserted into a hose and that is hard to be pulled out.

In a fifth aspect based on the third or fourth aspect, the sleeve is provided integrally with the base. This makes it possible to provide an easy-to-handle hose coupling that does not lose or lose the sleeve when the hose is attached or detached.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described. As shown in FIG. 1, the hose joint 1 according to the present embodiment is used for, for example, a quick joint. The quick joint is formed in a joint main body and has a substantially cylindrical base 2 provided with a socket into which a spigot is detachably inserted, and is provided concentrically with the base 2 outside the base 2. The sliding cylinder 4 holds the stopper so as to be able to move forward and backward in the direction, and releases the engagement between the stopper member (not shown) provided at the receiving port and the spigot.

A hose nut 5 is provided on a part of the outer peripheral surface of the base 2.
A nipple portion 7 which is inserted into the hose 3 wound spirally with a reinforcing member 3a made of a synthetic resin or the like and fitted with the hose 3 is provided as a base portion. 2 is provided. The outer diameter of the nipple portion 7 is formed to be substantially the same as the inner diameter of the hose 3.

Further, a sleeve 8 surrounding the hose 3 is formed on the outer periphery of the nipple portion 7 at the outer periphery of the nipple portion 7 by forming a cut 8 along the axial direction from the tip. And a minimum inner diameter portion 9a at the tip thereof
Protrudes in the inner diameter direction so as to easily hold the hose. Further, the hose nut 5 is screwed into the screwing portion 6 of the base 2 to abut on the outer periphery of the sleeve 9 at the annular projection 5a to reduce the diameter of the sleeve 9 and tighten the hose 3.

FIG. 2 is the same as the hose joint according to the first embodiment except that a normal hose 13 is inserted in place of the hose 3 with the reinforcing member, and that the present invention is not limited to the quick joint. . As shown in the figure, in the present embodiment, the nipple portion 7 is formed of an elastic body, and is attached to the base 2 so as to communicate with the flow path of the base 2 and protrude from the base 2. A flange 7a is provided at one end of the nipple 7, and is fitted and fixed in a groove formed in the base 2, thereby preventing the nipple 7 itself from being pulled out from the base 2.

A cylindrical synthetic resin reinforcing cylinder 10 having the same inner diameter and axis as the inner peripheral surface of the nipple portion 7 is embedded in an annular concave portion provided on the inner peripheral surface of the nipple portion 7. . Therefore, the outer peripheral surface of the reinforcing cylinder 10 is covered with the nipple 7. Since the inner peripheral surface of the reinforcing cylinder 10 and the nipple portion 7 have the same diameter, the inner peripheral surface of the reinforcing cylinder 10 is exposed in a part of the inner peripheral surface of the nipple portion 7. This reinforcing tube 10
In a region outside the nipple portion 7 in which is embedded, a sleeve 9 having the diameter reduced by screwing the hose nut 5 is positioned. This is because the diameter of the nipple portion 7 can be effectively prevented by supporting a region where the sleeve 9 which exerts the most pressing force on the hose 3 is fitted.

The base 2, frame 4, hose nut 5, nipple 7, and sleeve 9 described above are formed of a non-flexible synthetic resin.

The case where the hose joint 1 according to the present embodiment is used will be described. The nipple 7 is inserted into the hose 3 in which the sleeve 9 has been fitted. At this time, in this embodiment, since the nipple portion 7 itself is formed of an elastic body,
The nipple portion 7 is appropriately deformed and easily fitted to the hose 3. In this state, the hose nut 5 is screwed into the screwing portion 6 of the base 2. Then, the sleeve 9 is pressed by the protrusion 5a of the hose nut 5, the gap between the cuts 8 is reduced, and the sleeve 9 contracts in the radial direction at the minimum inner diameter portion 9a at the tip. When a hose with a helical reinforcement is used, the irregularities that appear on the inner surface of the hose are in close contact with the nipple portion 7 formed of an elastic body, which fills gaps and has high sealing properties.

According to the present embodiment, even when the nipple portion 7 made of an elastic material is inserted into the hose 3, the reinforcing cylinder 10 is provided in the region of the nipple portion where the hose 3 is inserted. The nipple 7 does not collapse. Further, in the present embodiment, since the nipple portion 7 is formed of an elastic body, the nipple portion 7 is formed to be slightly larger than the inner diameter of the hose so that the nipple portion 7 is formed of the hose 3.
And can also serve as a packing to improve sealing properties.

Further, in the present embodiment, the nipple 7
Since the body itself is formed of an elastic body, the gasket is easy to handle without being displaced or dislodged due to attachment and detachment of the hose.

Next, a second embodiment will be described with reference to FIG. The components having the same reference numerals as those shown in FIG. 2 are the same and are not described. In the hose joint 11 according to the present embodiment, unlike the first embodiment, the base 12 is provided along the entire inside of the nipple portion 17 and has the same axis as the nipple portion 17. A flexible reinforcing tube 20 communicates with the flow path of the base 12 and is formed integrally with the base 12. The nipple portion 17 inserted into the hose 3 is formed of an elastic resin. A flange 17 a is formed at one end on the root side of the nipple portion 17, and is fitted into a groove formed in the base 12. This prevents the nipple portion 17 from being pulled out in the protruding direction.

One end of the reinforcing cylinder 20 is fixed to the base 12, and the other end is aligned with the tip of the nipple 17.
The base 12 and the reinforcing cylinder 20 may be formed integrally as shown in FIG. 4, or the base 12 and the reinforcing cylinder 20 may be fixed by bonding or the like. In the present embodiment, in addition to the effects achieved in the first embodiment, the reinforcing cylinder 20 is fixedly provided on the base 12 and covers the entire area where the hose 3 can be inserted. The stiffness is higher than in one embodiment.

A third embodiment will be described with reference to FIG. The hose joint 21 according to the present embodiment differs from the hose joints 1 and 11 according to the first embodiment or the second embodiment in that a helical ridge 22 is provided on the outer peripheral surface of the nipple portion 27. Things.

When the hose 3 is mounted on the nipple portion 27, the sliding resistance of the outer peripheral surface of the nipple portion 27 with respect to the hose is further increased, and the hose is less likely to fall off the nipple portion 27. In particular, in the case of a hose with a spiral reinforcement,
The unevenness of the hose and the protruding ridge 22 are engaged with each other, so that the hose is harder to fall off. Also, a ridge 22 is provided in the recess of the hose.
In the case where the ridges are formed, the ridges 22 formed of an elastic material are not crushed in the gaps of the concave portions to enhance the sealing property, and the ridges 2 are formed on the convex portions of the hose.
When the rider 2 rides, the ridge 22 is crushed to some extent, and the inside of the hose and the nipple portion 27 come into close contact. Therefore, in the insertion area of the hose, regardless of the positional relationship between the attached hose and the ridge 22, the hose is prevented from dropping off, and the nipple portion 27 and the inside of the hose 3 are in close contact with each other, and the sealing property is improved. Can be improved.

Next, a fourth embodiment will be described with reference to FIG. The hose joint 31 according to the present embodiment includes the hose joints 1, 1 according to the first, second, and third embodiments.
Unlike 1 and 21, a sleeve 39 is provided so as to extend integrally with the base 32. An annular groove 34 is provided between the sleeve 39 and the base 32. In the annular groove 34, since the inflexible material forming the base 32 or the sleeve 39 is formed thin, this portion can bend to some extent. With this flexible structure, the protrusion 5 provided on the inner peripheral surface of the hose nut 5 is provided.
The sleeve 39 is pressed by a, and the hose can be strongly pressed by the minimum inner diameter portion 39a at the distal end of the reduced sleeve 39, and the hose 3 can be strongly gripped. According to the hose joint according to the present embodiment, since the sleeve 39 is connected to the base portion 32, it is possible to prevent the sleeve 39 from falling off the nipple portion 7 and losing the sleeve 39, so that a convenient hose joint is used. Can be provided.

Next, a hose joint 41 according to a fifth embodiment will be described with reference to FIG. As shown in the figure, the hose joint 41 according to the present embodiment has a nipple portion 47 formed in a tapered shape having an outer diameter gradually narrowing in a protruding direction thereof. In the present embodiment, at the tip of the nipple portion 47, the outer diameter is formed to be slightly smaller than the inner diameter of the hose 3, so that the nipple portion 47 can be easily inserted into the hose 3, and Then
The outer diameter is formed slightly larger than the inner diameter of the hose 3 so that the inner surface of the hose 3 is as close as possible to the outer surface of the nipple portion 47 so as not to fall off. A flange 47a is formed at the base of the nipple 47, and the base 4
2 is fitted in the groove provided in the groove 2.

According to this embodiment, the outer diameter of the nipple portion 47 has a width, and the inner diameter of the hose to be attached to the nipple portion 47 can have a certain width, so that the versatility is high. Further, the hose joint according to the present embodiment is used for the quick joint shown in FIG. 1 in which a receiving port or the like is provided on one side (a side omitted in FIGS. 2 to 6) of the base of the hose joint. Without limitation, for example, a hose joint in which one side of the base is directly attached to a tank or the like, a hose in which a nipple portion or the like is provided on one side of the base, It is needless to say that there can be various modes such as those in which the hose joints are symmetrically joined with the base part as a boundary, and those in which a plurality of hose joints are joined in parallel.

[0032]

As described above, according to the first aspect of the invention, the nipple portion is formed of an elastic body, and an inflexible reinforcing cylinder is provided inside the nipple portion, so that the nipple portion is formed. Prevents diameter reduction. Therefore, it is possible to provide a reliable hose joint by preventing the packing from dropping off when the hose is attached or detached. Further, it is possible to provide an easy-to-handle hose joint that does not need to adjust the position of the packing. Further, according to the present invention, it is possible to provide a hose joint having high adhesion and hermetic sealing with no fluid leakage at a connection portion between the nipple portion and the hose.

Further, it is possible to provide a hose joint which can ensure high rigidity without crushing or bending of a nipple portion due to fitting of a hose or the like. In addition, an inexpensive and economical hose coupling can be provided by a simple configuration and a hassle-free production. Further, it is possible to provide a hose joint having a long service life without damaging a hose or a nipple portion.

According to a second aspect of the present invention, a spiral ridge is provided on the outer peripheral surface of the elastic material covering the nipple portion. Therefore, in addition to the effects provided by the first invention, it is possible to provide a hose joint in which the helical ridge is engaged with the hose and the hose is hard to come off.

According to a third aspect, in the first or second aspect, a sleeve is provided between the hose and the hose nut. Thereby, according to the present invention, the hose fitted to the nipple portion formed of the elastic body is pressed by the sleeve, and the nipple portion adheres tightly to the inner wall surface of the hose to obtain high sealing performance and high sliding resistance. Can be. This makes it possible to more effectively prevent the hose from falling off, and also makes it easier to handle the elastic portion of the nipple portion without detaching the hose by detaching the hose.

According to the fourth aspect of the present invention, since the outer diameter of the nipple is formed so as to gradually decrease in the direction in which the nipple projects, the outer diameter of the nipple is smaller than the inner diameter of the hose at the tip of the nipple. By forming and forming the outer diameter larger than the inner diameter of the hose at the base of the nipple,
It can be easily inserted into the hose and hard to come off. Further, since the inner diameter of the hose that can be attached to the nipple can have a certain width, the versatility is high.

According to the fifth invention, the sleeve is fixedly provided on the base. Therefore, when the hose is attached or detached, the sleeve does not fall off, so that it is easy to handle.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a hose joint according to a first embodiment.

FIG. 2 is a cross-sectional view of the hose joint according to the first embodiment.

FIG. 3 is a sectional view of a hose joint according to a second embodiment.

FIG. 4 is a cross-sectional view of a hose joint according to a third embodiment.

FIG. 5 is a sectional view of a hose joint according to a fourth embodiment.

FIG. 6 is a sectional view of a hose joint according to a fifth embodiment.

[Explanation of symbols]

 1,11,21,31,41 ... Hose joint 2,12,32,42 ... Base 3,13 ... Hose 4 ... Sliding cylinder 5 ... Hose nut 6 ... Screw part 7,17,27,47 ... Nipple part 8: Cutting 9, 39: Sleeve 9a, 39a: Minimum inner diameter portion 10, 20, 40: Reinforcing cylinder 22: Ridge

Claims (5)

(57) [Claims] 1. A hose tightening the nipple portion formed of an elastic body for attaching the hose by inserting the base portion formed in the joint body protrudes to the hose, the hose between the nipple portion by screwing to the base nuts and provided on the inside of the nipple portion, hose fittings and having a reinforcing tube inflexible which prevents the diameter of the nipple portion. 2. The hose joint according to claim 1, wherein a spiral ridge is provided on an outer peripheral surface of the nipple portion. 3. The hose coupling has a sleeve formed with a cut along an axial direction from a distal end, the distal end having a sleeve whose diameter can be reduced, an inner peripheral surface of the hose nut abutting on the sleeve, and the sleeve is reduced in diameter. The hose joint according to claim 1 or 2, wherein the hose is tightened. Wherein said nipple portion has a hose coupling according to any one of claims 1 to 3, characterized in that it is formed in a tapered shape having an outer diameter which narrows gradually toward its projecting direction. 5. The hose joint according to claim 3, wherein the sleeve is provided integrally with the base so as to extend therefrom.