JPH10299968A - Pipe joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To confirm the completely connected state of a pipe body by sound by inserting the metal pipe body in an inner collar of a female body, then pressing a pressing member such as a hard ball to the joint deep part side along with the inner collar when the tip of the pipe body presses the pressing member, and generating sound when the pressing member falls into a peripheral groove. SOLUTION: When a pipe body 40 is inserted in an inner collar 8 into a position where the tip 41 of the pipe body 40 collides with a step part 2, a pressing member (ball) 9 is fitted into a peripheral groove 42 formed at the outer peripheral surface of the pipe body 40, and the ball 9 falls into the peripheral groove 42 to generate sound. In the completely connected state of the pipe body, in case of pull-out direction force acting upon the pipe body, the ball 9 is pressed to the taper part 11 side of an outer collar 10 by a spring 7, and the ball 9 is pressed to the surface of the pipe body 40 by the taper part 11 so as to impede pull-out of the pipe body 40. In case of detaching the pipe body 40, the outer edge part of the inner collar 8 is pressed by a tool or the like to move the inner collar 8 to the female body 1 side, thus releasing fastening force of the ball 9.

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 for use in various pipes or faucet fittings, and more particularly to a method for connecting and disconnecting a metal pipe in a space where it is difficult to use a tool. The present invention relates to a suitable pipe joint structure.

[0002]

2. Description of the Related Art Conventionally, as for a pipe joint used for a relatively flexible synthetic resin or rubber pipe, a pipe joint which is relatively easy to connect to and detach from the pipe has been put to practical use. However, there are only a few metal tubes that can be freely connected and disconnected.

[0003] However, Japanese Patent Application Laid-Open No. 6-272795 proposes a pipe joint suitable for connecting and disconnecting a relatively hard pipe. FIG. 10 shows the outline of this proposed technique, in which a large diameter portion 6 of a female body 61 forming a base of a pipe joint is shown.
An inner collar 65 having a coil spring 63 and a ball 64 extrapolated is fitted on the second side. The inner collar 65 is covered with an outer collar 66 extending from the female body 61, and a taper surface 67 is formed on the outer collar 66. Is formed to hold the ball 64 to prevent the inner collar 65 from coming off. In the figure, reference numeral 68 denotes an O-ring for sealing.

When the tubular body 60 is inserted into the inner collar 65, its tip is the deepest part (step) of the large diameter part 62.
At 69, the position is determined and the binding is completed. When a force is applied to pull out the tube 60 or a fluid is passed through the tube 60, a force is applied in a direction in which the tube 60 is pulled out. The outer surface of the tube 60 is pressed by the ball 64, and the tube 6
0 is prevented from being pulled out. As described above, the connection with the pipe joint 60 is simple, and at the time of use, the function of preventing the detachment works.

On the other hand, in order to pull out (remove) the tube body 60,
When the protruding end 65 ₀ of the inner collar -65'll push gently on the inside, Te - Pa - board was interposed between the outer surface of the face 67 and the tube 60 - inwardly with Le 64 inner collar -65 The movement of the tube 64 releases the pressure exerted on the outer surface of the tube 60 by the ball 64, and the tube 60 can be easily pulled out while maintaining this state.

[0006]

As described above, the pipe joints already proposed are relatively widely used because they have a relatively simple structure and can be easily connected and disconnected. However, there is also a demand for further improvement in the pipe joints already proposed. That is, the tube body 60 is inserted into the inner collar 65, and its tip hits the deepest portion (step portion) 69 of the large diameter portion 62 to determine its position and complete the connection. When the end of the pipe contacts the O-ring 68, it may be mistaken that the connection is completed. When used in this state, there is a concern that fluid leakage may occur.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has been made so as to be able to confirm that the pipes have been completely connected. It is a complete connection.

[0008]

SUMMARY OF THE INVENTION The present invention has been developed to add a function to the already proposed pipe joint in order to cope with the above-mentioned further demands, and its structure is as follows. . That is, the pipe body has a stepped portion to which the distal end of the pipe inserted into the deepest part of the flow path of the female body serving as the base of the pipe joint, and a peripheral groove for O-ring fitting is formed on the inner periphery on the deep side. From the side, a spring, a pressing member, and an inner collar supporting the pressing member are arranged so as to be slidable in the axial direction of the tube, are covered by an outer collar extending from the female body, and the deep side is larger at the tip of the outer collar. A taper part having a diameter is formed, and the outer collar is swingably engaged with the female body, and a metal joint inserted into a flow passage of the female body. A pipe joint structure according to the present invention is characterized in that a peripheral groove in which a pressing member is fitted is formed on the outer periphery of the tubular body when the distal end of the tubular body contacts the step portion.

Further, by making the tip of the outer surface of the female body covered with the outer collar small, the swingability of the outer collar is secured, and the outer diameter of the inner collar is large at the deep side. In addition, by having a slit or a concave portion capable of reducing the diameter in the radial direction, the engagement between the pressing member and the tubular body is completed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Since the present invention has the above-mentioned structure, when connecting a pipe joint and a metal pipe, the pipe is inserted from the tip of the inner collar of the female body. Will be combined. That is, a metal tube is inserted from the tip of the inner collar of the female body, and when the tip of the tube passes through the pressing member, the pressing member is pushed together with the inner collar toward the joint deeper side. When the pressing member (hard ball) comes into contact with the deepest step portion of the flow path, it falls into a circumferential groove formed on the outer peripheral surface of the pipe body, and is pushed back by the spring together with the inner color to the tip side of the inner color. The integrity of the body will be confirmed. A pressing member (hard boring)
At the time of the drop, the clicking sound due to the metal-to-metal contact confirms that the connection of the pipes is complete.

The detachment of the pipe from the pipe joint is as follows. By pushing the tip of the inner collar inward in the coupled fitting and tube, the ball in contact with the taper surface of the outer collar is moved inward together with the inner collar. .
That is, the contact between the ball and the outer collar is released, and the force pressing the surface of the tube is released. By pulling out the tube while maintaining this state, the two can be easily separated. It is a thing. Next, if the force for pushing the inner collar is loosened after detaching the tubular body, the inner collar is pushed again by the spring and returns to the original state, and the joining and detaching of the tubular body are repeated here. It becomes.

In the pipe joint of the present invention, since the outer collar is formed separately from the female body and is mounted so as to be swingable, in other words, the outer collar is slightly eccentric. Thus, even if the pipe is slightly eccentric with respect to the pipe joint, the above-mentioned connection and detachment can be performed without difficulty. Further, since the outer collar is made swingable, it can follow the swing and rotation of the tube body, absorbing these extra forces and remarkably improving the durability performance. . The female body and the outer collar are not particularly required to have a sealing property. For example, the engaging surface can be engaged by a retaining ring, a hard ball, a caulking or the like.

As the spring used in the present invention, a coil spring, a disc spring, and a cylindrical rubber elastic body are mainly used, which give a resilient supporting force to the inner collar.
The inner collar preferably has a slightly protruding edge from the tip of the outer collar. Pressing the inner collar provides a detachment function of the tube. Also,
The outer collar is made of a synthetic resin or a metal. In particular, in the case of the inner collar, a taper hole having a large diameter on the outer peripheral surface side is punched, and a pressing member such as a hard ball is provided here. You just have to insert it. By providing a slit or recess in the inner collar, the outer diameter of which is large on the deep side and whose diameter can be reduced in the radial direction, the pull-out preventing force of the tube can be further increased.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The pipe joint structure of the present invention will be described below in more detail with reference to embodiments. FIG. 1 shows a first embodiment of the pipe joint structure of the present invention.
It is a half-section sectional view showing an example. In the figure, reference numeral 1 denotes a female body forming a base of a pipe joint, and a flow path of a large diameter portion 3 is formed on the right side of a step portion 2 and a flow path of a small diameter portion 4 is formed on the left side. The inner surface of the large diameter portion 3 is provided with two circumferential grooves 5, 5, into which O-rings 6, 6 are fitted. A coil spring 7 and an inner collar 8 made of a synthetic resin are arranged at the edge of the large diameter portion 3 together with the hard ball 9, and the entire body is covered with an outer collar 10. The outer collar 10 is extrapolated to the outer peripheral surface of the large diameter portion 3 of the female body 1, and has a tapered portion 11 with its leading end reduced in diameter.

The means for engaging the outer peripheral surface of the large-diameter portion 3 with the outer collar 10 is not particularly limited, and in the illustrated example, the outer peripheral surface of the large-diameter portion 3 and the outer collar 10 are not limited. Are formed on the inner peripheral surface of the base member, and a retaining ring 14 is fitted and locked therein. Therefore, the outer collar 10 is capable of swinging with respect to the large-diameter portion 2 of the female body, is rotatable in the circumferential direction with respect to the large-diameter portion 2, and has an outer collar 10 as shown in FIG. -10 indicates that the female body can be slightly eccentric. In the illustrated example, the outer edge at the end of the large-diameter portion 3 is slightly reduced in diameter.
Needless to say, the swing of 10 becomes smoother.

Although the structure in which the outer surface of the large-diameter portion 3 of the female body 1 is covered by the outer collar 10 has been described in detail in the example of the drawing, it is needless to say that the present invention is not limited to this. As described above, the large diameter portion 3 and the outer collar 10 can be fitted in reverse, and the locking method as described above can be adopted on the fitting surface. By the way, in FIG.
This shows a structure in which the outer collar 10 is covered by the end of the outer ring, peripheral grooves 20 and 21 are formed therebetween as shown in FIG. 1, and a retaining ring 22 is fitted and locked therein.

As described above, in any case, the large-diameter portion 3 of the female body 1 and the outer collar 10 are formed separately and are swingable and rotatable in the circumferential direction. Not only is it very easy to insert the tube 40 into the tube 8, but it also produces favorable results in use.

In the metal tube 40 used,
A circumferential groove 42 is formed at a predetermined position from the tip 41 of the tube 40. The distance W between the distal end 41 of the tube 40 and the circumferential groove 42 is determined by the step 2 of the female body 1 and the pressing member (ball).
The interval is substantially equal to the interval X with respect to 9.

Here, the connection and detachment of the pipe joint and the pipe will be described in more detail with reference to FIG. 1 as an example. In FIG. 1, when the tube 40 is inserted into the inner collar 8, the tip 41 of the tube 40 hits the step 2, and the position is determined. As described above, when the pipe 40 is completely inserted, the pressing member (ball) 9 and the circumferential groove 42 are fitted to each other, and it is confirmed that the sound of the ball 9 falling into the circumferential groove 42 is confirmed. By tube 40
Can be found to have been inserted reliably.

Here, when a force is applied to pull out the tube 40 from this state, or when a fluid flows in the tube 40 in this state, that is, a force acts in a direction in which the tube 40 is pulled out. In this case, the ball 9 is pressed against the taper portion 11 of the outer collar 10 by the elastic force of the spring 7, and the ball 9 is pressed by the taper portion 11 of the outer collar 10. 9 presses the surface of the tube 40, which prevents the tube 40 from being pulled out of the pipe joint.

That is, the ball 9 is a taper of the outer color 10.
The portion 11 is located on the side of the tube 40 and cuts into a circumferential groove 42 formed on the outer surface of the tube 40 as shown in FIG. If an excessive pressure or pull-out force is applied, the inner collar 8 follows the ball 9 and the tube 40 and moves to the smaller diameter side of the outer collar 10, so that the inner collar 8 has a larger diameter. The portion is placed on the tube 40 side by the taper portion 11 of the outer collar 10, and the tube 40 is more firmly gripped as shown in FIG.

[0022] Now, when leaving the tube 40 from the pipe joint, the tip 1 tip 8 ₀ shell -10 in said collar -8
It is more prominent than 0 ₁ and will be used. That is, the withdrawal of the tube 40, in which the tubular body 40 by pressing the tip 8 ₀ of the inner collar -8 in the direction of the female body 1 comes out. In other words, the protruding portion 8 _{0 of the} inner collar 8
By pressing, the inner collar 8 is moved to the female body 1 side, and the ball 9 is also moved along with this, and the taper section 1 is moved.
The tightening force due to the contact with the pipe 1 is released, and the pipe 4
0 can be easily pulled out from the female body 1.

[0023] Incidentally, in the relationship between the inner collar -8 and the outer shell 10, it is not necessary to tip 8 ₀ of the inner collar -8 necessarily protrudes, the female body 1 and the inner collar -8 externally It just needs to be able to move to the side. Figure 6 is a partial sectional view showing an example thereof, even the tip 8 ₀ of the inner collar -8 not protrude from the outer collar 10, may be Osere driver -24, etc., even small outside collar -10 Open the hole 25,
Here, the driver 24 or the like may be pushed in to move the inner collar 8 toward the female body 1.

FIG. 7 is a front view of an inner collar 8 particularly effectively used in the present invention. The inner collar 8 supports the ball 9 and has recesses 26 at four locations on the outer surface side. The inner color of that portion is a thin portion 27. When an excessive pressure or pulling force is applied to the inner collar 8, the thin film portion 27 formed by the recess 26 is formed.
Are bent outward, thereby facilitating the reduction of the diameter of the inner collar 8. In a joint employing an inner collar having such a structure, the pressing material is 1.5 to 1.5 times larger than that of a joint having only a ball.
It has been found that it has about twice the pull-out inhibiting force.
The concave portion 26 of the inner collar 8 may have a complete slit shape without the thin film portion 27, but has a shape in which the thin film portion 27 is left so that the inner collar 8 is not deformed before the tube 40 is inserted. Are preferred.

Specifically, the pipe joint of the present invention is provided with a water supply / hot water supply hose and a hand shower hose in a hot and cold water mixing faucet.
It can be used favorably for steel joints. That is, FIG. 8 is a front view of a hand shower-type hot and cold water mixing faucet in which a spout portion provided on a sink or a vanity stand is drawn out and used, and FIG. 9 is a side view thereof. This faucet is inserted into the mounting hole 51 formed in the counter 70 of the kitchen.
Single lever type main body 50 fixed by penetrating 70
Is provided with a valve element therein. By operating the lever 57, the valve element can be opened and closed and the mixing ratio of water and hot water can be changed so that water can be discharged from the hand shower 58. And the body 5
From 0, a water supply hose 53, a hot water supply hose 52, and a supply pipe 59 extend downward through the mounting hole 51. Water supply hose 5
3. The hot water supply hose 52 is connected to a water stopcock or piping material (not shown) with the pipe joint 55 of the present invention. Water supply hose 5
3. The pipe 40 according to the present invention is attached to the tip of the hot water supply hose 52, and the connection with the female body according to the present invention can be easily attached by hand with one touch. Things.

The hand shower 58 can be inserted into and removed from a sleeve portion 56 protruding from the entire surface of the main body 50. The hand shower 58 can be used in a state of being fixed to the main body 50 shown in FIG. A flexible hose 54 is connected to a supply pipe 59 for mixed water, which is in communication with the valve element and protrudes from the lower end of the main body 50, so that the hand shower 58 can move. ing. The supply pipe 59 and the hose 54 are connected by the pipe joint 55 of the present invention. The distal end of the supply pipe 59 is the tubular body 40 according to the present invention, and the female body according to the present invention is attached to the distal end of the hose 54. These connections can be made with one touch and by hand. It is a thing.

As described above, the faucet fitting using the pipe joint of the present invention can be mounted in a relatively small mounting hole, can be easily and reliably connected, and can be manually operated in a narrow space. The construction has become possible.

The connecting structure of the faucet fitting which has been widely used in the past requires a large diameter cap nut at the tip of the flexible hose, the connecting method is a screw type, and it is necessary to turn with a spanner. was there. For this reason, the work space and time required for connection with a wide space were required.
The pipe joint of the present invention has solved all of these problems.

[0029]

According to the present invention, by adopting the above structure, even with a metal tube, the connection is completed and the tube can be detached freely.
In particular, attachment and detachment in a narrow space is facilitated, and the industrial effect is extremely large.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing a first embodiment of a pipe joint according to the present invention.

FIG. 2 is a side view of the pipe joint of FIG. 1;

FIG. 3 is a partial sectional view showing another example of the pipe joint of the present invention.

FIG. 4 is a partial sectional view showing a use state of the inner collar and the ball.

FIG. 5 is a partial sectional view showing a use state of the inner collar and the ball when an excessive pressure is applied.

FIG. 6 is a partial cross-sectional view showing another relationship between an inner color and an outer color.

FIG. 7 is an inner color particularly effectively used in the present invention.
FIG.

FIG. 8 is a front view when the pipe joint of the present invention is applied to a faucet fitting.

FIG. 9 is a side view of the faucet fitting of FIG. 8;

FIG. 10 is a sectional view showing an example of a conventional pipe joint.

[Explanation of symbols]

1) Female body forming the base of pipe joint, 2) Step of flow path, 3) Large diameter part of flow path, 4) Small diameter part of flow path, 5) Inner surface of large diameter part 3 circumferential groove, 6 ‥‥ O-ring, 7 ‥‥ coil springs, 8 ‥‥ in color -, 8 ₀ ‥‥ in color - the tip, 9, 18 ‥‥ hard ball - le, 10 ‥‥ shell -, 10 ₁ {Tip of outer collar, 11} Taper of outer collar, 12, 20} Peripheral groove of large diameter part, 13, 21} Peripheral groove of outer collar, 14, 22} ‥ Retaining ring, 23 ‥‥ Hole for hole on outer side of inner collar, 24 ‥‥ Driver, 25 ‥‥ Hole in outer collar, 26 ‥‥ Depression on outer surface side of inner collar , 27 ‥‥ thin part of inner collar, 40 ‥‥ pipe, 41 ‥‥ tip of pipe, 42 ‥‥ circumferential groove of pipe, 50 ‥‥ faucet fitting body, 51 ‥‥ mounting hole, 52 ‥湯 Hot water supply hose, 53 ‥‥ Water supply hose , 54 ‥‥ bendable hose, 55 ‥‥ fitting, 56 ‥‥ sleeve, 57 ‥‥ lever, 58 ‥‥ hand shower, 59 ‥‥ supply pipe, 70 ‥‥ kitchen counter -.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Moritasu Kamata 1-1-1, Kyobashi, Chuo-ku, Tokyo Inside Bridgestone Flowtech Co., Ltd. (72) Inventor Kunihiro Tanaka 1-1-1, Kyobashi, Chuo-ku, Tokyo Inside Bridgestone Flow Tech Co., Ltd. (72) Inventor Kazuhiro Nogami 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Totoki Kiki Co., Ltd.

Claims (3)

[Claims] 1. A female body having a step at the deepest portion of a flow path and a peripheral groove for O-ring fitting formed at an inner periphery on the deep side,
A spring, a pressing member, and an inner collar supporting the pressing member are arranged so as to be slidable in the axial direction of the tube from the deep side, and are covered with an outer collar extending from the female body. A pipe joint having a tapered portion having a large diameter on the side, the outer collar being swingably engaged with the female body, and a metal inserted into the flow passage of the female body. A pipe joint structure, wherein a peripheral groove is formed on the outer periphery of the tubular body when the leading end of the tubular body comes into contact with the stepped portion so that a pressing member is fitted. 2. The pipe joint structure according to claim 1, wherein a tip of the outer surface of the female body covered with the outer collar has a small diameter. 3. The pipe joint structure according to claim 1, wherein the outer diameter of the inner collar has a large diameter on the deep side and a slit or a concave portion capable of reducing the diameter in the radial direction.