JP2001032986A - Packing for engaging member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure sufficient sealing performance not only in the low water pressure, but in the high water pressure by forming a passage for communicating with a space part formed of a tongue shaped part and a base part, on the base part or the tongue shaped part. SOLUTION: In a packing 18, leakage of water is prevented between engaging/disengaging parts of a nipple member and hose joint 1 in a condition in which an upper end opening part 23 of the packing 18 is tightly fitted to an outer peripheral surface of the nipple member, by fitting the packing 18 to the engaging/disengaging part of the nipple member. Since water flows from a recessed groove 22 as a communicating passage for water into an annular space part 24 disposed between the inner circumferential surface of a base part 19 and a tongue shaped part 20, water pressure acts on an inner circumferential surface of the tongue shaped part 20, and pressing force is improved toward the outer peripheral surface of the nipple member. In the case where water pressure is low, pressing force acting on the inner circumferential surface of the tongue shaped part 20 is weakened. However, since the length of the tongue shaped part 20 of the packing 18 is long, an area which is brought into contact with the nipple member is wide, and high sealing performance is ensured. In the case where water pressure is high, the high sealing performance is ensured since pressing force acting on the inner circumferential surface of the tongue shaped part 20 is strengthened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engaging member using a packing for an engaging member having a high sealing property even at a low water pressure or a high water pressure.

[0002]

2. Description of the Related Art A conventional packing for an engaging member has a nipple member provided with an O-ring as a sealing member (see, for example, Japanese Utility Model Publication No. 2-37022). Further, in order to reduce the sliding resistance when the nipple member and the engaging member are detached from each other, a U-shaped packing is provided in the engaging member at a position where the nipple member comes into contact with the tip of the nipple member when engaging with the nipple member. (Eg, JP-B-63-29)
No. 155).

[0003]

However, when the nipple member is provided with an O-ring, the O-ring and the engagement member may be disengaged when the nipple and the engagement member are attached or detached. Detachment could not be performed smoothly due to high sliding resistance. In the case where the U-shaped packing is provided in the engaging member, under high water pressure, the tip of the nipple member engaged with the engaging member by water pressure acting on the annular space around the inner periphery of the U-shaped packing. Is pressed from the outer peripheral surface, so that the tightening force is strong and the seal can be satisfactorily sealed. However, at the time of low water pressure, the pressing force by the water pressure is weak. Also, in order to ensure sufficient sealing performance at low water pressure, the tongue-shaped tip of the U-shaped packing, which is the contact surface with the nipple member tip, is lengthened, and the pressing area to the nipple member tip is increased. However, if the length is too long, the tip of the tongue-shaped portion of the U-shaped packing comes into contact with the base portion, and blocks water from flowing into the annular space around the inner periphery of the U-shaped packing. As a result, the pressing force due to the water pressure cannot be obtained, and the tip of the connected nipple member and U
There is a problem that water leakage occurs between the tip of the tongue-shaped packing portion.

[0004] An object of the present invention is to provide a packing for an engagement member which solves the above-mentioned problems.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems.
In a packing for an engaging member provided between a connecting portion to which a pipe end is connected to one end and an engaging and disengaging portion which is detachably engaged with a nipple member at the other end, the packing for the engaging member is: Forming a tongue extending from the end of the cylindrical base toward the center, and forming a communication passage in the base or tongue communicating with the space formed by the base and the tongue; It is a packing for an engaging member, which is a feature.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the packing for an engaging member according to the present invention will be described below with reference to the drawings.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to the drawings, taking as an example a hose joint to which a hose that is a soft tube is connected as a pipe to be connected to an engaging member. In FIG. Is composed of an engaging / disengaging portion 3 to which the hose 12 is attached and a connecting portion 4 to which the hose 12 is attached.

The engagement / disengagement portion 3 is formed with a fitting recess 5 into which the nipple member 2 is fitted, and a tubular fitting cylinder 7 having an opening 6 formed along the periphery thereof. A locking piece 8 which is arranged and provided in the fitting concave portion 5 so as to be able to protrude and retract from the opening 6 of the fitting cylindrical portion 7 in the radial direction;
And

The slide tube portion 9 is provided around the locking piece 8 and is normally urged by a spring 10 so that the locking piece 8 projects from the opening 6.
Is engaged with the concave portion 11 formed in the nipple member 2 to bring the hose joint 1 and the nipple member 2 into an engaged state. When the sliding piece 8 is slid toward the non-biasing side (vertical direction in the drawing) against the biasing force of the spring 10, the locking piece opening concave portion 3 provided on the inner peripheral surface of the slide cylinder portion on the outer side of the locking piece 8.
0 is positioned and the locking piece 8 can be retracted into the opening 6, so that the engagement between the locking piece 8 and the recess 11 is released.

Therefore, according to the engaging and disengaging portion 3, the hose joint 1 is attached to the nipple member 2 by pressing the nipple member 2 into the fitting recess 5 of the engaging and disengaging portion 3. Then, the nipple member 2 is disposed in the fitting concave portion 5 of the engagement / disengagement portion 3, and the nipple member 2 and the hose joint 1 communicate with each other. The engaging piece 8 protruding from the opening 6 of the fitting cylinder 7 is engaged with the concave portion 11 of the nipple member 2. It is attached and fixed to the nipple member 2.

On the other hand, in order to remove the hose joint 1 from the nipple member 2, the slide cylinder 9 is slid toward the non-biasing side (vertical direction in the drawing) against the biasing force of the spring 10. Then, the locking piece opening concave portion 30 provided on the inner peripheral surface of the slide cylinder portion is located on the outer side of the locking piece 8, and the locking piece 8 can be immersed in the opening 6. Piece 8
The engagement between the hose joint 1 and the concave portion 11 is released, and the hose joint 1 can be easily removed from the nipple member 2. Note that the locking structure of the engaging and disengaging portion 3 is an example of the configuration of the hose joint 1 according to the present invention, and the structure of the engaging and disengaging portion 3 may be different.

The connecting portion 4 is formed by erecting a hose mounting tube portion 13 into which the end of the hose 12 is inserted, and from the base end of the hose mounting tube portion 13 around the hose mounting tube portion 13. A sleeve 1 having a threaded tube portion 14 having an external thread formed on the outer periphery thereof, and a sleeve 1 disposed on the outer periphery of the distal end of the hose mounting tubular portion 13 and having a radial cut at the distal end so as to be reduced in diameter.
5 and the sleeve 1
And a nut member 16 for reducing the diameter of the nut 5. Then, when the nut member 16 is screwed into the screw cylinder portion 14, the nut member 16 comes into contact with the end of the sleeve 15 and
5 is reduced in diameter, and the outer periphery of the hose 12 inserted into the hose mounting tube 13 is pressed to fix the hose 12 to the hose mounting tube 13. Note that the hose connection structure of the connection portion 4 is an example of the configuration of the hose joint 1 according to the present invention,
The structure of the connecting portion 4 may be changed to another structure.

Then, a packing 18 is provided in the packing storage recess 17 between the inner peripheral surface of the fitting cylinder portion 7 of the engagement / disengagement portion 3 and the connection portion 4.

The packing 18 has a cylindrical base 1.
The inner diameter of one end of the packing 9 is larger than the inner diameter of the other end, and a tapered surface 21 is formed on the inner peripheral surface of the packing from the small diameter portion to the large diameter portion. Then, a tongue-shaped portion 20 is formed from the small-diameter portion end toward the base central portion and toward the large-diameter portion side. Are formed radially at three places. In addition, the communication passage has a concave groove,
The shape, number, and position are not limited to the location and the inner peripheral surface of the tapered surface 21 from the base 19, as long as water can be communicated.

The packing 18 is fitted to the nipple member 2 and the hose with the upper end opening 23 of the packing 18 in close contact with the outer peripheral surface of the nipple member 2 by the fitting of the nipple member 2 into the engagement / disengagement portion 3. Water leakage between the joint 1 and the engagement / disengagement portion 3 is prevented. At this time, the base 19
Water flows into the annular space portion 24 provided between the inner peripheral surface and the tongue-shaped portion 21 from the concave groove 22 serving as a water communication path, so that water pressure acts on the inner peripheral surface of the tongue-shaped portion 20. Then, the pressing force on the outer peripheral surface of the nipple member 2 is increased. When the water pressure is low, the pressing force acting on the inner peripheral surface of the tongue portion 20 is weak, but since the tongue portion 20 of the packing 18 is sufficiently long, the contact area with the nipple member 2 is large, and high sealing performance is obtained. To secure. When the water pressure is high, the pressing force acting on the inner peripheral surface of the tongue-shaped portion 20 is increased, so that high sealing performance can be secured.

FIG. 3 shows a case where a convex portion 25 is formed on the packing base in the packing for the engaging member.
A portion of the base 19 where the convex portion 25 is not formed is used as a communication path to the space 24.

FIG. 4 shows a case where a groove 26 serving as a communication path to the space 24 is formed in the packing tongue portion in the packing for the engaging member.

According to the packing for an engaging member of the present invention, a tongue extending from the end of the cylindrical base toward the center is formed, and the tongue is formed by the base and the tongue. By forming the communication passage communicating with the space in the base portion or the tongue-shaped portion, the sealing property and the pressing area with the nipple member engaged with the engagement member can be increased, so that not only at high water pressure but also at low water pressure Sufficient sealing performance can be secured in some cases.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a hose joint to which a soft tube hose is connected as an engaging member according to an embodiment of the present invention when a nipple member is engaged.

FIG. 2 is a cross-sectional view in which a concave groove is formed in a packing base in a hose joint to which a hose of a soft tube is connected as an engaging member according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view of a hose joint to which a soft tube hose is connected as an engaging member according to an embodiment of the present invention, in which a convex portion is formed on a packing base.

FIG. 4 is a cross-sectional view in which a concave groove is formed in a packing tongue-shaped portion in a hose joint to which a hose of a soft tube is connected as an engaging member according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hose joint 2 Nipple member 3 Engagement / removal part 4 Connection part 5 Fitting concave part 6 Opening 7 Fitting cylinder part 8 Locking piece 9 Slide cylinder part 10 Spring 11 Concave part 12 Hose 13 Hose mounting cylinder part 14 Screw cylinder part 15 Sleeve 16 Nut member 17 recess for packing storage 18 packing 19 base 20 tongue portion 21 tapered surface 22 concave groove 23 upper end opening 24 annular space portion 25 convex portion 26 concave groove

Claims (1)

[Claims] 1. A packing for an engaging member provided between a connecting portion to which one end is connected to a pipe end and an engaging and disengaging portion which is detachably engaged with a nipple member at the other end. The member packing forms a tongue extending from the cylindrical base end toward the center, and a communication passage communicating with the space formed by the base and the tongue is formed on the base or the tongue. A packing for an engaging member, wherein the packing is formed as described above.