JP3281482B2 - Pipe 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 pipe joint structure, and more particularly to a pipe joint which can easily connect and disconnect pipes without inadvertent disconnection.

[0002]

2. Description of the Related Art As a conventional pipe joint, there is a ball lock type pipe joint in which a connecting member is formed of a steel ball, and a nose 2 connected to a pipe 1 as shown in FIG. 3 and is connected by a steel ball 8 inserted between respective opposing concave portions and is sealed by an O-ring 5. The steel ball 8 is pressed against the lower surface of the collar 4 inserted by compressing the collar spring 6 and locked.
The collar 4 is locked to the body 3 by a retaining ring 7. However, it has been pointed out that the device is easily detached due to vibration or careless external force to the collar-4. Further, the price is about 3 to 10 times as expensive as that of a normal threaded joint, and improvement is required also in this regard.

[0003] However, the applicant of the present invention has disclosed a Japanese Utility Model Application No. 1-156.
No. 390 provided an inexpensive pipe joint having a simple structure. An outline of this proposed invention is shown in FIG.
FIG. 19 shows an outline of a cross section taken along a line. A nose 12 connected to a pipe 11 is inserted into a body 13, and a stop ring 16 is connected between the opposed concave grooves 14 and 15. Both ends of the stop ring 16 are formed as knobs 18 from the notch 17. That is, the coupling and disengagement of the pipe joint can be performed by reducing and restoring the diameter of the stop ring 16. Then, a cap or the like (not shown) is fitted into the knob portion 16 to prevent accidental detachment.

[0004]

However, even with the above-mentioned proposal, improvement may still be required depending on the situation of use. As shown in FIG. 14 described later, the nose 12 is inserted into the body 13. When the stop ring 16 is
When the nose 12 is inserted out of a predetermined position in 4 and 15 and the nose 12 is inserted, the stop ring 16 is deformed, and also the body 13 and the nose 12 are damaged. Thus, the stop ring 16
When the nose 12 is joined while the nose remains deformed, the stop ring 16 cannot be reduced in diameter and cannot be restored, so that the nose 12 and the body 13 cannot be separated. In addition, when the nose 12 is inserted, the hooked stop ring 16 may be pushed deep into the body 13.
In this case, the nose 12 and the body 13 cannot be completely connected, and slip through during use to cause an accident.

SUMMARY OF THE INVENTION The present invention provides a pipe joint having an improved stop ring mechanism in a previously proposed pipe joint. With a single touch.

[0006]

The present invention has the following structure to achieve the above object. That is, the gist of the present invention resides in that a nose is inserted into a body and a stop ring is inserted into one of a plurality of concave grooves provided to face each other, and an O-ring is inserted into another groove.
A pipe having a notch for operating the stop ring provided on the body, the ring being attached and coupled and sealed, the nose and the body being coupled or separated by the expansion and contraction diameter of the stop ring; A joint, wherein the concave groove is formed in the body, a small hole as a cutout penetrating the body from the concave groove, and a long hole along the concave groove slightly apart from the small hole and fitted in the concave groove. A complete stop ring and both ends are bent outward.
A bent portion that is inserted into the small hole and the other is inserted into the long hole and protrudes from the body, surrounds the outer periphery of the body, and has a cap that is rotatable in the circumferential direction. And a short joint corresponding to the long hole.

[0007] Preferably, a spring member made of, for example, a plate-shaped spring, which presses the distal end of the bent portion of the stop ring, is mounted inside the short recess. or,
The cap is made of a synthetic resin, and a plate-like spring integrated with the cap is formed in the short recess, and a claw for rotation is preferably formed on the outer periphery of the cap. It is preferable that one of the concave grooves to which the stop ring is mounted is a peripheral groove having a substantially trapezoidal cross section, and the other is a step groove.
It is preferable that the root of the screw is formed as an inclined surface, and an elastic ring partially cut away is fitted into the inclined surface.

[0008]

According to the present invention, both ends (bent portions) of the stop ring have one side (a) penetrating the small hole of the body to reach the long recess of the cap, and the other side (b) has the long hole of the body. And the end (b) of the cap is elastically pressed by a spring material as a preferable structure. Therefore, by rotating the cap in the direction of the long hole, one end (a) of the stop ring abuts on the peripheral edge of the small hole of the body and is prevented from moving. The cap will move in the long recess. On the other hand, the other end (b) of the stop ring abuts on the periphery of the short concave portion of the cap and is prevented from moving, but moves in the long hole of the body. As described above, by rotating the cap, both ends of the stop ring are opened, and as a result, the diameter of the stop ring is increased.

Preferably, as described above, the one end (b) of the stop ring is resiliently pressed by the spring material so that the stop ring is always pressed inward even when the diameter of the stop ring is expanded. Thus, the stop ring is maintained in the groove. Of course, even when the diameter of the stop ring is not expanded, the stop ring is pushed inward due to the presence of the spring material, and is housed in the groove. For this reason, even when the nose is inserted into the body, the stop ring is securely fitted in the concave groove without being caught, and the body and the nose can be easily and reliably connected. is there. On the other hand, by rotating the cap toward the long hole of the body, the stop ring is expanded in diameter, and in this state, the nose can be easily pulled out.

A groove for mounting the stop ring is formed as a pair at both ends of the body and the nose. The stop ring is fitted into the groove. One side of the groove has a substantially trapezoidal cross section. It is preferable that the groove is a circumferential groove and the other side is a step groove. When both are used as a coupling and a pipe joint, the stop ring fits into the small-diameter groove side of the step groove to complete the connection, while the disengagement moves the stop ring to the large-diameter groove side, This is because the diameter can be more easily increased.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a pipe joint according to the present invention. FIG. 1 is a front view showing the entire body side of a pipe joint of the present invention, and FIG. 2 is a side view thereof. A cap 50 made of synthetic resin is attached to the outer periphery of the body 20 so as to be rotatable in the circumferential direction. FIG. 3 is a top view showing only the body 20 taken out, and FIG. 4 is a half sectional view taken along line AA.

The body 30 has a nose 30 which will be described later.
Is inserted into the large-diameter interior 21 and the small-diameter interior 2 connected thereto.
2 are formed. A step groove 23 is formed on the inner peripheral surface of the large-diameter interior 21, and a small-diameter groove 2 is formed on the outside.
4. The step groove 23 is formed by a large-diameter groove 25 on the back side. And in this body 20, this step groove 23
A long hole 27 is formed slightly apart from the round hole 26 in correspondence with. Further, the body 20 has a step portion 29 formed at the outer peripheral end thereof with the flange portion 28 and the above-described round hole 26 and long hole 27 interposed therebetween, and is used for mounting a cap 50 described later. Note that the pointed end 20 ₁ of the body 20, e - be one scan 60 is subjected to plugged with use, especially e used in high pressure fluid - In the scan 60, the fibers of the plurality of layers or steel - Turkey - reinforcing layer 61 made of de or the like is embedded in the rubber 62, in some cases, ho the pointed end 20 ₁ - e after the scan 60 is inserted, is plugged by the fixing band (not shown) or the like - scan In some cases, 60 circumferential surfaces are fastened.

On the other hand, as shown in FIG. 5, the nose 30 comprises a nose portion 31 inserted into the large-diameter interior 21 of the body 20 and a screw portion 32, and the nose portion connected to the screw portion 32. 31
The inclined surface 33, the groove 34 O- ring 34 ₀ is fitted, the groove 36 of the stop ring fits circumferential groove 35, further O- ring 36 ₀ at its tip is fitted to be described later husband between s Is formed. The circumferential groove 35 is a groove that forms a pair with the step groove 23 and accommodates the stop ring, and usually has a substantially trapezoidal cross section.

[0014] The the inclined surface 33 be one part of the elastic ring 33 ₀ notched is written fit, is usually located, the elastic ring 33 ₀ to a small portion of most diameters, Bruno - 's 30 is in contact when it is inserted up to the base body 20 and the tip of the elastic ring 33 ₀ and the body 20 abut, so that the elastic ring 33 ₀ are moved forcibly along the inclined surface 33. That is, by the elastic ring 33 ₀ acts force for returning the body 20 to its original position is enlarged, the elastic ring 33 ₀ When releasing the pressing force of the body 20 is reduced in diameter to the original diameter, that It functions to push the body 20 back to the distal end side by an amount.

FIG. 6 is a plan view of the stop ring 40. The stop ring 40 has a ring shape as a whole and both ends 41, 4 thereof.
2 is bent outward. The stop ring 40 fits in a step groove 23 of the body 20 and a circumferential groove 35 formed in the nose 30, and the bent portions 41 and 42 of the stop ring 40 have round holes 26 formed in the body 20.
And are fitted into the long holes 27, respectively, and protrude outward from the body 20.

FIG. 7 is a sectional view showing the relationship between the body 20 and the stop ring 40. In particular, the step groove 23, the round hole 26, the long hole 27, and the stop ring 4 in the body 20 are shown.
0 shows the relationship with the bent portions 41 and 42.
Now, the stop ring 40 is formed at both ends 4 of the stop ring 40 through the round hole 26 and the long hole 27 formed in the body 20.
When the ends 41 and 42 are separated from each other, that is, the bent portion 4 of the stop ring 40
When 1, 42 are expanded to the left and right, 41 abuts on the peripheral edge in the round hole 26 and stops its movement.
7 is largely moved along the long axis direction, so that the diameter of the stop ring 40 is increased. The original state of the stop ring 40 is the step groove 2 of the body 20.
3 and the circumferential groove 35 of the nose portion 31, but by expanding the diameter of the stop ring 40,
The stop ring 40 fits only in the step groove 23, and the nose 30 can be pulled out in this state.

The stop ring 40 having such a function is provided for coupling and disengagement between the body 20 and the nose 30, but as it is, the stop ring 40 as in the prior art described above is used as it is. It has a structure in which both sides protrude outward from the outer periphery of the device, and this protruding portion is bent by unexpected external force, clothes or the like are caught on the protruding portion, and in some cases, the both ends 41, 42 are separated. When a force is applied in the direction, the body 20 and the nose 30
Is inadvertently removed as described in the description of the conventional example.

Therefore, in the present invention, the cap 50 having the structure described below is used. Usually, the cap 50 is formed of a synthetic resin,
₁ and 50 ₂ are combined and formed into a cap 5
It is set to 0. Figure 8 is divided cap 50 ₁ of the inner surface, and FIG. 9 is a cross-sectional view taken along line B-B of FIG. 8, FIG. 10 is the C
It is sectional drawing in the -C line. That is, the inner peripheral edge 51 of the split cap 50 ₁ has a diameter that fits the outer circumferential surface of a portion stepped groove 23 of the body 20 is formed. The continuous to the inner peripheral edge 51 and the short recess 52 ₁ and Nagakubo portion 53 ₁ is formed, it is separated by walls 54 _1. In addition, this short recessed part 5
Pawl 55 ₁ is formed on the outer peripheral side 2 ₁ and Nagakubo portion 53 ₁ and surrounds. The short recess 52 ₁
Opposite to the long hole 27 formed in, whereas, Nagakubo portion 53 ₁ is formed to face the circular hole 26.

[0019] FIG. 11 is a sectional view of the other inside view of a split cap 50 _2, 12 is a side view, FIG. 13 is D-D line in FIG. 11. The split cap 50 ₂ is combined with the split cap 50 ₁ are those cap 50 is completed, the short recesses 52 ₁ of each the divided cap 50 _1,
The short recess 52 ₂ and the long recess 53 are opposed to the long recess 53 ₁ , respectively.
₂ and the wall 54 ₂ is formed, in which likewise claw 55 ₂ are also formed on the outer periphery.

The cap 50 of the present invention is obtained by combining the two divided caps 50 _{1 and} 50 ₂ , thereby facing the round hole 26 and the long hole 27 formed in the body 20, The long concave portion 53 and the short concave portion 52 are formed. Incidentally, in the split cap 50 _2,
Short recess 52 ₁ of the other split cap 50 _1, Nagakubo 53
If ₁ or the like is large enough, the Tankubo unit 52 _2, as a matter of course that may be merely a plate without forming the Nagakubo portion 53 ₂ and the like.

As shown in the drawing, as a preferred embodiment, a spring material is provided in the short recessed portion 52 of the cap 50 to press one bent portion of the stop ring 40. in the embodiment, the split cap 50 ₂ in the short recess 52 in _2, tongue-shaped plate spring 56
Are integrally formed. The leaf spring 56 comes into contact with the distal end of the bent portion 41 of the stop ring 40 that is arranged to protrude into the short concave portion 52, and always keeps the distal end of the bent portion 41 when the stop ring 40 is expanded in diameter. It acts to push inward. Due to the presence of the spring material 56, the stop ring 40 is always maintained in the step groove 23 and the circumferential groove 35.

Hereinafter, further description will be made with reference to this preferred structure example. FIG.
FIG. 2 is an enlarged cross-sectional view showing a relationship between the cap 50 and 0.
FIG. 15 is an enlarged sectional view when the claw 55 of the cap 50 is pressed with a finger and the cap 50 is rotated in the circumferential direction. That is,
In FIG. 14, the bent portion 41 of the stop ring 40 is always pushed inward by the spring material 56, so that the stop ring 40 is accommodated in the step groove 23.

On the other hand, when the cap 50 is rotated with the claw 55, the bent portion 42 fitted into the round hole 26 of the stop ring 40 first comes into direct contact with the peripheral edge of the round hole 26, and its position is maintained. , This is a long depression 5
3, the cap 50 will rotate further without being hindered by it. However, the other bent portion 41 is always in contact with the peripheral edge of the short recess portion 52 while its tip is pressed by the spring material 56. However, when the cap 50 is further rotated in this state, the bent portion 41 moves along the long hole 27 of the body 20, where the stop ring 40 expands mainly in the large diameter groove 25 of the step groove 23. It will be diameter.
In this state, the detachment of the two is easily completed by pulling out the nose 30 (not shown).

However, when the spring member 56 is not provided, the stop ring 40 can be moved up and down, for example, as shown in FIG. 14, so that the stop ring 40 may be moved by the step groove 23 of the body 20 as shown by a dotted line in some cases. If the case 30 is pushed into the body 20 in this state when the case 30 is pushed out from the inside to the inner diameter side, the stop ring 40 may not be located at a predetermined position and may be deformed. Pushed into the back, body 2
There is a possibility that the function of coupling and decoupling between the zero and the nose 30 may not be achieved. In this preferred example, this disadvantage is also improved.

FIG. 16 shows a state in which the nose 30 is inserted into the body 20 and the two are connected.
When the nose portion 31 of the nose 30 is completely inserted into 0, the connection is automatically performed. That is, the diameter of the stop ring 30 accommodated in the step groove 23 on the inner surface of the body 20 is increased at the nose portion 31 of the nose 30, and this is formed into a circumferential groove 35 formed on the outer periphery of the nose portion 31. Then, the diameter is reduced to return to the original diameter, and the connection is completed here. Then, when a high-pressure fluid is passed through the pipe joint in this state, the two move away from each other due to the fluid pressure, and the stop ring 40 is
Between the small-diameter groove 24 and the circumferential groove 35, and the connection becomes more complete.

On the other hand, when the two are separated, the cap 50 is rotated with the pawl 55 to expand the diameter of the stop ring 40, and the nose 30 is pulled out of the body 20 in this state. Stop ring 4
0 should be moved from inside the small diameter groove 24 of the step groove 23 to inside the large diameter groove 25, and then the diameter should be increased by the cap 50. For this reason, in the specific structure of the present invention, it is preferable to once press the body 20 and the nose 30 in a direction in which they are further joined. By doing so, the step groove 23 is formed.
The stop ring 40 contained in the small diameter groove 24 of
It moves to the large-diameter groove 25 side, so that its diameter can be easily expanded.

[0027] In the embodiment of the present invention, Roh as shown in FIG. 5 - is the elastic ring 33 ₀ is fitted to the root of's 31 exert a force back to the position of the original binding body 20. That is, when the withdrawal presses the elastic ring 33 ₀ at the tip of the body 20, although it is possible to leave both by expanding the diameter of the elastic ring 33 _0, Bruno -'s 30 is withdrawn If not, it fulfills an action of returning rapidly to the original coupling state by the elastic force of the elastic ring 33 _0.

[0028]

According to the present invention having the above-described structure, the body and the nose can be freely connected to and disconnected from each other, so that accidental detachment due to the action of an external force can be prevented. Can be eliminated, and the practical value is extremely high.

[Brief description of the drawings]

FIG. 1 is a front view showing the entire body side of a pipe joint according to the present invention.

FIG. 2 is a side view of the body shown in FIG. 1;

FIG. 3 is a top view showing only a body taken out.

FIG. 4 is a half sectional view taken along line AA of FIG. 3;

FIG. 5 is an exploded side view of the nose of the present invention.

FIG. 6 is a plan view of a stop ring.

FIG. 7 is a sectional view showing a relationship between a body and a stop ring.

Figure 8 is a interior view of the split cap 50 _1.

FIG. 9 is a sectional view taken along line BB of FIG. 8;

FIG. 10 is a sectional view taken along line CC in FIG. 8;

Figure 11 is a interior view of the split cap 50 _2.

FIG. 12 is a side view of FIG. 11;

FIG. 13 is a sectional view taken along line DD in FIG. 11;

FIG. 14 is an enlarged cross-sectional view illustrating a relationship among a body, a stop ring, and a cap.

FIG. 15 is an enlarged sectional view when the cap is rotated in FIG.

FIG. 16 is an enlarged view showing a connected state of the body and the nose.

FIG. 17 is a conceptual diagram of a ball lock type pipe joint.

FIG. 18 is a conceptual view of a pipe joint proposed in Japanese Utility Model Laid-Open No. 1-156390.

FIG. 19 is a sectional view taken along line EE in FIG. 18;

[Explanation of symbols]

20 mm body, 23 mm step groove on the inner peripheral surface of the body, 24 mm small diameter groove forming the step groove, 25 mm large diameter groove forming the step groove, 26 mm round hole drilled in the body 27, a long hole formed in the body, 30, a nose, 33, an inclined surface into which an elastic ring fits, 34, 36, a groove into which an O-ring is fitted, 35, a stop ring A circumferential groove into which is fitted, 40 ° stop ring, 41, 42 ° both ends of the stop ring (bent portion), 50 ° cap, 50 ₁ , 50 ₂ split cap, 52, 52 ₁ , 52 ₂ { Small recess of cap, 53, 53 ₁ 53 ₂ ‥‥ Long recess of cap, 54, 54 ₁ , 54 ₂ ‥‥ Wall of cap, 55, 55 ₁ , 55 ₂爪 Claw of cap, 56 小 Small recess of cap Spring material in the part.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 4-56295 (JP, U) JP-A 7-34291 (JP, U) JP-A 49-125916 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) F16L 37/14

Claims (6)

(57) [Claims] 1. A nose is inserted into a body, and a stop ring is mounted on one of a plurality of concave grooves provided opposite to each other, and an O-ring is mounted on another groove, thereby connecting and sealing. A pipe joint having the cut-off portion for operating the stop ring provided on the body, wherein the cut-off portion for operating the stop ring is provided on the body; A notch is formed with a small hole that penetrates the body from this groove and a long hole that is slightly apart from this hole and along the groove, and a stop ring that fits in the groove and both ends are bent outward. A bent portion, one of which is inserted into the small hole and the other is inserted into the long hole, and which protrudes from the body, surrounds the outer periphery of the body, and has a cap rotatable in the circumferential direction. Along the long recess and the short recess corresponding to the long hole A pipe fitting characterized by the following. 2. The pipe joint according to claim 1, wherein a spring member for holding a tip of a bent portion of the stop ring is mounted inside the short recess. 3. The pipe joint according to claim 1, wherein the cap is made of synthetic resin, and a plate-like spring integrated with the cap is formed in the short recess. 4. The pipe joint according to claim 1, wherein one of the grooves into which the stop ring is mounted is a circumferential groove having a substantially trapezoidal cross section, and the other is a step groove. 5. The pipe joint according to claim 1, wherein the root of the nose is an inclined surface, and an elastic ring partially cut away is fitted into the inclined surface. 6. The pipe joint according to claim 1, wherein a claw for rotation is formed on an outer periphery of the cap.