JPH07794Y2 - Pipe fitting - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a pipe joint capable of easily attaching and detaching a water pipe or a pipe such as a hose with one touch.

[Prior art] Pipe fittings with a structure that allows easy attachment / detachment are conventionally
There is one disclosed in Japanese Patent Publication No. 52-103427. It was as shown in FIG. 6 for its schematic structure.
In the figure, a is a female member, b is a male member fitted in the female member, and c is an annular groove formed on the outer periphery of the male member b. d and d are leaf spring-shaped locking strips, and push buttons e and e are fixed to both ends of the locking strips d and d, and the push buttons e and e are opened on the opposing wall of the female member a. The through holes f, f are arranged so as to be retractable. However, when attempting to put on and take off the pipe joint, the locking strips d, d must be pressed unless the push buttons e
Cannot be separated from the annular groove c. For this reason, there is a drawback that a considerable force is required on the fingertips and it is difficult to support the female member a itself because the pushbuttons e, e need to be sandwiched by both fingertips in this way, and therefore the engagement / disengagement operation is smooth. There was a drawback that I could not do.

[Purpose of the Invention] The present invention is intended to solve the above-mentioned drawbacks and make the engaging and disengaging operation easier.

[Means for Achieving the Object] In order to achieve the above object, the present invention comprises a male member having a straight tubular fitting portion formed therein, and a female member having a fitting hole through which the fitting portion can be inserted and removed. An inwardly projecting claw piece is integrally formed with a substantially C-shaped elastic ring, and an annular groove is formed on the outer periphery of the fitting portion, and the claw piece is loosely fitted to the opposing peripheral wall portions of the female member. A lateral hole is formed, and a portion of the claw piece facing the C-shaped notch side is slid on the inner peripheral surface of the lateral hole with an inclined surface, and an elastic ring is attached to the outer periphery of the female member. Due to the elasticity, when the claw piece is projected from the lateral hole into the fitting hole and engaged with the annular groove, elasticity is formed so that a gap is formed between the outer peripheral surface of the female member and the inner surface of the middle portion of the elastic ring. By shaping the ring and pressing the outer surface of the middle portion of the elastic ring to crush the gap, the claw piece moves along the inclined surface. The pipe joint is characterized in that the elastic ring is slid to widen between both ends of the elastic ring and the claw piece is disengaged from the annular groove.

[Operation] The substantially C-shaped elastic ring is shaped so that a space is formed between the elastic ring and the outer peripheral surface of the female member, and the claw piece slides along the inclined surface. By pressing the outer surface of the central portion to squeeze the both ends, both ends are expanded and the female member fitting portion can be easily inserted and removed.

[Embodiment] Next, an embodiment of the present invention will be described with reference to FIGS. A straight tubular fitting portion 3 is integrally formed at the other end of a male member 2 having one end formed with a screw hole 1 for connecting a water pipe or a hose, a water discharger, etc., and an annular groove is formed on the outer periphery of the fitting portion 3. Four
Are formed. An O-ring 5 is fitted on the outer circumference of the tip of the fitting portion 3. Reference numeral 6 denotes a female member having a fitting hole 7 into which the fitting portion 3 can be inserted and removed, and a screw hole 8 to which a water pipe, a hose or the like can be connected is formed at the other end of the female member 6. Reference numeral 9 is a substantially C-shaped elastic ring made of elastic plastic, in which claw pieces 10, 10 projecting inward are integrally formed at both ends. The claw pieces 10, 10 are formed with inwardly inclined surfaces 10a, 10a at the portions facing the C-shaped notches. Female member 6
A peripheral groove 11 to which the elastic ring 9 is attached is formed on the outer periphery of the female member 6 over about two-thirds of its circumference. Then, the claw pieces 10 and 10 can be loosely fitted in the lateral holes 12 and 12 in which the lateral holes 12 and 12 penetrating the peripheral wall of the female member 6 are formed in the bottom of the circumferential groove 11. The lateral hole
Slopes 12a, 12a capable of sliding contact with the slopes 10a, 10a are formed on the inner peripheral surfaces of the surfaces 12, 12 facing the slopes 10a, 10a. The tip ends of the claw pieces 10 and 10 project into the fitting hole 7, and sloped surfaces 10b and 10b are formed in a portion of the protruding portion facing the opening edge of the fitting hole 7. In this way, when the elastic ring 9 is attached to the outer periphery of the female member 6, the female member 6
The C-shape of the elastic ring 9 is slightly crushed up and down as shown in FIG. 2 when no load is applied so that a gap g is formed between the outer peripheral surface of the elastic ring 9 and the inner surface of the middle portion of the elastic ring 9. It is molded to be. As shown in FIG. 5, a ridge 13 is integrally formed on one side surface of the middle portion of the elastic ring 9.
Is formed, and a recess 14 that slidably fits the protrusion 13 is formed on the inner wall surface of the circumferential groove 11 of the female member 6. The elastic ring 9 is attached to the circumferential groove 11 by the engagement of the protrusion 13 and the recess 14 so as not to rotate around the female member 6.

In the pipe joint configured in this way, the fitting portion 3 is fitted into the fitting hole 7
The outer peripheral edge of the tip of the fitting portion 3 when inserted into
The claw pieces 10, 10 are pushed outward by hitting the inclined surfaces 10b, 10b to allow their entry. Then, in the annular groove 4, the claw pieces 10, 10
Is restored by the elasticity of the elastic ring 9 and
10, 10 are engaged and held so as not to come off. In order to release the engagement, the female member 6 is held and the outer surface of the middle portion of the elastic ring 9 is pressed by a forefinger or the like to crush the gap g. The claw pieces 10, 10 can be spread apart to separate them outward. Therefore, the tip ends of the claw pieces 10 and 10 can be removed from the annular groove 4 and the male member 2 can be removed from the fitting hole 7. At this time, the elastic ring 9
Since the protrusion 13 is slidably engaged with the recess 14, it prevents unnecessary rotation of the female member 6 in the circumferential direction. Therefore, when the elastic ring 9 is pressed, the displacement is prevented. The claw pieces 10, 10 are evenly spaced from the annular groove 4 and can be smoothly separated. When the pressing force on the elastic ring 9 is released, the elasticity of the elastic ring 9 causes the claw pieces 10 and 10 to project into the fitting hole 7 as before. In this embodiment, when the outer surface of the middle portion of the elastic ring 9 is pressed, the slanted surfaces 10a, 10a of the claw pieces 10, 10 slide along the slanted surfaces 12a, 12a of the lateral holes 12, 12 to cause the elasticity. Ring 9
However, the inclined surfaces 10a, 10a to 12a, 12a forming the guide for the expansion are not necessarily provided in the claw pieces 10, 10 to the lateral holes 12, 12. However, as long as the inner surface of the elastic ring 9 and the outer peripheral surface of the female member 6 are in contact with each other, they may be provided on both sides of the gap g. All you have to do is expand it.

[Effects of the Invention] As described in the above embodiments, the pipe joint of the present invention is
Since the claw pieces at both ends of the elastic ring can be opened and disengaged by simply pressing the outer surface of the elastic ring at one place, the engagement and disengagement can be easily performed by operating the fingers supporting the female member. Moreover, since there are two claw pieces, the engaged state can be reliably maintained. A substantially C-shaped elastic ring with claw pieces integrally formed at both ends is externally fitted to the outer periphery of the female member and both claw pieces are fitted into the lateral holes, so that they can be easily attached and completed with a simple structure. It is possible to provide a high-quality pipe joint.

[Brief description of drawings]

1 is a longitudinal sectional view at the time of connection, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG.
The drawing is a vertical sectional view at the time of removal, FIG. 4 is a sectional view taken along the line BB of FIG. 3, FIG. 5 is a sectional view taken along the arrow C of FIG. 1, and FIG. 6 is a transverse sectional view of a conventional pipe joint. Is. g ... void, 2 ... male member, 3 ... fitting portion, 4 ... annular groove, 6 ... female member, 7 ... fitting hole, 9 ... elastic ring,
10,10 …… Claw pieces, 11 …… circumferential grooves, 12,12 …… Horizontal holes.

Claims (1)

[Scope of utility model registration request] 1. A male member having a straight tubular fitting portion formed therein, a female member having a fitting hole into which the fitting portion can be inserted and removed, and claw pieces projecting inwardly at both ends are integrally formed. And a substantially C-shaped elastic ring, forming an annular groove on the outer periphery of the fitting portion,
A lateral hole into which the claw piece is loosely fitted is formed in the opposing peripheral wall portions of the female member, and a portion of the claw piece facing the C-shaped notch side is slid on the inner peripheral surface of the lateral hole with an inclined surface. When the elastic ring is attached to the outer periphery of the female member and the elasticity of the elastic member causes the claw piece to project into the fitting hole from the lateral hole and engages with the annular groove, the outer peripheral surface of the female member and the true ring of the elastic ring. An elastic ring is shaped so that a space is formed between the inner surface of the center part and the outer surface of the middle part of the elastic ring is pressed to crush the space, whereby the claw piece slides along the inclined surface. A pipe joint characterized in that the both ends of the elastic ring are expanded to separate the pawl from the annular groove.