JP2008064303A - Joint of resin-made flexible hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To integrally assemble each metallic component in a non-welding manner to an end of a flexible hose which is a resin-made tube protective from any interference of other member and sufficiently flexible, and to integrally assemble a hose nipple to a cap nut via a stop wire in a factory with excellent workability. <P>SOLUTION: A resin-made flexible hose is formed by passing a flexible resin-made inner tube through a resin-made outer tube of a braided basket-like cylindrical body in which strands of resin mono-filaments are not adhered to each other in a covering manner. A metallic hose nipple is assembled to an end of the resin-made flexible hose. A holding nut is housed over the ring-shaped hose nipple drawn from the end and screwed thereto. A resin-made sleeve, or a rubber-made sleeve or a metallic sleeve interposed between the holding nut and the resin-made flexible hose is integrally assembled to the resin-made flexible hose in a non-welding manner. In addition, the hose nipple and the cap nut are integrally assembled to each other via a stop wire in a factory or the like with excellent workability. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is particularly suitable for joining a resin pipe, such as a water pipe, which is buried in the ground or the like as a metal part in a non-welded state, and a hose nipple and a cap nut. The present invention relates to a joint made of a resin-made flexible hose that can be integrated in advance at a factory or the like.

  In recent years, proposals have been made to use water pipes such as waterworks with resin pipes. As is well known, water pipes such as waterworks are often buried and used in the ground, so steps must be provided or obstacles must be bypassed to adapt to the underground environment. In addition, a large number of joint members, bent joints, and the like in the buried piping structure are required, and there is a problem that the piping structure itself becomes complicated and the cost increases.

  For this reason, proposals have been made to use water pipes as resin pipes, and those in which the water pipe is made from resin pipes have been previously proposed by the applicant of the present application. That is, a resin tube having a structure in which a flexible hose is formed by covering a resin outer tube of a squirrel-cylinder tubular body that is braided without bonding between the strands of a resin monofilament while inserting a flexible inner resin tube. is there.

  In order to form such a resin pipe, a dedicated crimping machine (not shown) is required, which is unsuitable for work on the construction site, and because such a resin pipe is different from a metal pipe, it is welded. There is a problem that cannot be performed. In particular, the resin outer tube of a cage-like cylinder braided without bonding the strands of resin monofilament has the disadvantage that welding is not possible due to the cage-like cylinder, etc., and it is also good to simply use an adhesive There is also a problem that proper adhesion cannot be obtained.

  In order to achieve the above-mentioned object, the present invention protects the resin tube from interference of other members, and at the end of the flexible hose which is a resin tube having sufficient flexibility, each component made of metal It is suitable to integrate the hose nipple and the cap nut in a non-welded state, and provide a joint made of a resin-made flexible hose which is manufactured as a part in which a hose nipple and a cap nut are integrated in advance at a factory or the like.

In order to achieve the above object, the present invention provides a flexible flexible resin hose having a cylindrical shape as defined in claim 1, wherein the end of the flexible resin hose is made of metal. The hose nipple is embedded so that one end of the hose nipple is embedded and the diameter-enlarged center of the hose nipple is in contact with the outer side of the end of the flexible hose. Assemble a sleeve that fits the center part of the hose nipple and a presser nut that fits the center part of the hose nipple. Assembling integrally, the flexible hose made of resin and the hose nipple are firmly attached to each other in a non-welded state.
According to a second aspect of the present invention, the sleeve assembled to the end of the flexible hose is made of a resin sleeve, a rubber sleeve, or a metal sleeve. According to a third aspect of the present invention, the resin-made flexible hose is covered while inserting the flexible resin inner tube through the resin outer tube of a squirrel-cylinder cylinder that is braided without bonding the strands of the resin monofilament. It is characterized by becoming. According to a fourth aspect of the present invention, the end portion of the resin-made flexible hose is characterized in that one end side of the incorporated hose nipple is either a screw-type hose nipple or a nut-type hose nipple. According to a fifth aspect of the present invention, the inner peripheral surface of the sleeve is subjected to anti-slip processing that is bonded to the outer peripheral surface of the resin-made flexible hose. According to a sixth aspect of the present invention, the anti-slip process applied to the inner peripheral surface of the sleeve is selected from an adhesive coating layer, a protrusion, and a tooth-shaped protrusion.

According to the first aspect of the present invention, a metal hose nipple is incorporated in the end portion of a flexible resin hose having flexibility, and the presser nut and sleeve are externally fitted to the outer periphery of the hose end portion. Therefore, the metal parts can be integrally joined in a non-welded state.
In addition, when the hose nipple and cap nut are assembled together, it can be made into a part that has been integrated with good workability in advance using a caulking dedicated machine at a factory or the like, which can contribute to cost reduction. .
According to the second aspect of the invention, in addition to the above effects, the sleeve can be formed of a resin sleeve, a rubber sleeve, a metal sleeve, or the like.
According to the invention described in claim 3, in addition to the above-described effect, it is possible to provide a sufficient resin-made flexible hose that can protect the resin tube from interference of other members.
According to invention of Claim 4, in addition to said effect, the edge part of resin-made flexible hose can be easily made into either a screw type hose nipple or a nut type hose nipple.
According to the fifth and sixth aspects of the invention, in addition to the above-described effects, the sleeve can exhibit a strong anti-slip effect.

  Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a joint end of a resin-made flexible hose, and FIG. 2 is an external view showing a schematic configuration of the joint of the resin-made flexible hose according to the present invention.

  Since the resin-made flexible hose 2 is often used by being buried in the ground, it can withstand vibrations, earth pressure or ground subsidence applied from the ground or buildings, and various underground In order to avoid such obstacles, it is necessary to have excellent flexibility, and the flexible hose 2 is protected from the interference of other members, and is a resin tube having sufficient flexibility.

  As shown in FIG. 2, the resin-made flexible hose 2 is composed of a two-layer tube including a first-layer resin inner tube 3 and a second-layer resin outer tube 4, and the resin inner tube 3 is a cylinder. It is a flexible resin tube that is flexible in shape and has a cavity 3a through which water flows. The resin outer tube 4 is formed as a basket-like cylindrical body 4b braided without bonding the strands of the resin monofilament 4a. The resin outer tube 4 has a cylindrical shape and is flexible, and the resin inner tube 3 is inserted therethrough. This is externally fitted and covered.

  The resin inner tube 3 may be made of resin or rubber, but polyethylene resin is preferable. In addition, the resin outer tube 4 is protected from interference with other members of the resin tube in order to insert and cover and protect the resin inner tube 3, and the resin outer tube 4 itself becomes a cage-like cylindrical body 4b having sufficient flexibility. However, polyethylene terephthalate is preferable in consideration of the braidability between the strands of the resin monofilament 4a.

  Next, the structure provided in the edge part of the resin-made flexible hose 2 is demonstrated, referring the exploded view of each component of FIG. A cylindrical hose nipple 5 including an attachment portion 5a, a central portion 5b, and a flare end portion 5e is integrally formed at the end portion of the resin-made flexible hose 2, and the attachment portion 5a side is connected to the end of the flexible hose 2. It is arranged as a part side. The mounting portion 5a of the hose nipple 5 is inserted and fitted toward the end portion of the flexible hose 2 as described above, and the surface side is formed in a saw shape, and the end portion of the flexible hose 2 in contact with the hose nipple 5 Specifically, it is firmly fixed to the resin inner tube 3.

  A central portion 5b of the hose nipple 5 is formed as a ring shape whose diameter is larger than that of the attachment portion 5a, and a screw 5d is cut on an outer peripheral surface of the ring-shaped central portion 5b. That is, the end of the flexible hose 2 (the resin inner tube 3 and the resin outer tube 4) is in contact with the boundary between the mounting portion 5a and the ring-shaped central portion 5b having an enlarged diameter.

  Further, the other end (front end side) 5c of the hose nipple 5 is set longer than the width of a cap nut 8 described later, and has the same diameter as the outer diameter of the flexible hose 2. The side is a flare end portion 5e having a larger diameter than that.

  A ring-shaped sleeve 6 is fitted on the outer peripheral surface of the flexible hose 2. The sleeve 6 is formed of a resin sleeve, a rubber sleeve, a metal sleeve, or the like. The sleeve 6 is firmly fixed to the flexible hose 2, specifically the resin outer tube 4 in cooperation with a presser nut 7 to be described later, and a flange portion 6 a provided at one end side. It is comprised by the cylindrical part 6b following this flange part 6a. Further, as shown in FIG. 4, a cutout portion 6c is provided in the longitudinal direction of the sleeve 6, and is formed as a half-shaped sleeve. The sleeve 6 is forcibly half-cut by manual operation from the notch 6g. A shaped sleeve is deployed.

  Furthermore, the inner peripheral surface of the ring-shaped sleeve 6 is formed uniformly with the outer peripheral surface of the flexible hose 2 (see FIG. 3), but the outer peripheral surface of the cylindrical portion 6b is from the flange portion 6a side to the cylindrical portion 6b. It is formed as a tapered surface that is inclined obliquely downward to the side. Further, as shown in FIG. 3, an adhesive 6e to be bonded to the flexible hose 2 is applied to the inner peripheral surfaces of the resin sleeve 6A and the rubber sleeve 6B, and protrusions 6d are provided at a plurality of locations. (The protrusion 6d is inserted between the strands of the resin monofilament 4a), and the action of the adhesive 6e and the protrusion 6d is combined to increase the pull-out prevention force. In the case of the resin sleeve 6A, it is formed of a polyamide resin and is formed so as to withstand a considerable tightening load. However, any material may be used as long as it has the above-described action. Further, in the case of the rubber sleeve 6B, any material may be used as long as the above action is achieved. Further, as shown in FIG. 5, the inner peripheral surface of the metal sleeve C is subjected to anti-slip processing including a tooth-shaped protrusion 6h, thereby increasing the slip-out preventing force.

  The metal presser nut 7 is fitted on the sleeve 6 and the ring-shaped central portion 5 b of the hose nipple 5. The inner peripheral surface of the presser nut 7 is provided with a screw 7 a and a space 6 f for inserting the sleeve 6. Therefore, the presser nut 7 fitted around the sleeve 6 and the central portion 5b of the hose nipple 5 includes the sleeve 6 and the central portion 5b of the hose nipple 5 on its inner peripheral surface.

  On the other hand, the cap nut 8, which is a cylindrical body, has a screw 8 a formed on its inner peripheral surface, and a locking wire locking groove 8 b into which the locking wire 9 is inserted. After the cap nut 8 is once assembled into the front end portion 5c of the hose nipple 5 that can be loosely fitted, the lock wire locking groove 8b of the cap nut 8 is assembled into the lock wire 9 with a crimping machine. The cap nut 8 is prevented from coming off by the stop wire 9 and the stop wire locking groove 8b.

  The hose nipple 5 and the cap nut 8 are assembled in advance at the factory, and the hose nipple 5 and the cap nut 8 are integrated from the factory and assembled at the site. Is.

Next, the assembly method will be described.
(1) First step / flexible hose preparation step A flexible hose 2 is prepared by combining a resin inner tube 3 and a resin outer tube 4 that fits and covers the resin inner tube 3 in two layers.

(2) Second process / Assembly process of hose nipple and cap nut Perform assembly work in advance at the factory. The hose nipple 5 and the cap nut 8 are assembled together. While the cap nut 8 is interposed in the flare end portion 5e of the hose nipple 5, a stop wire 9 is attached to the stop groove engaging groove 8b of the cap nut 8 with a crimping machine (not shown), and the cap nut 8 and the hose nipple 5 are attached. Integrate

(3) Third process / Assembly process of flexible hose and presser nut Insert a presser nut 7 having a screw 7a from the end side of the flexible hose 2 into the inner peripheral surface and allow the presser nut 7 to freely fit into the flexible hose 2. Fit in.

(4) Fourth process / Assembly process of flexible hose and sleeve The flange 6a of the sleeve 6 is attached to the outer periphery of the flexible hose 2 so as to be on the end side (opening side) of the flexible hose 2.

(5) Fifth process / Assembling process of hose nipple and flexible hose Assembling work has been performed in the factory in advance, and the union of the cap nut 8 and the hose nipple 5 is brought in from the factory and assembled on site. I do. The mounting portion 5a of the hose nipple 5 is inserted into the end portion of the flexible hose 2 and attached so as to contact the end portion side (opening side) of the flexible hose 2, and the hose nipple 5 and the cap nut are integrally formed with the flexible hose 2. 8 is assembled.

(6) Sixth step / Assembly step of flexible hose and sleeve Attached so that the flange portion 6a of the sleeve 6 is on the end side (opening side) of the flexible hose 2. For example, the resin agent 6e is applied to the inner peripheral surface of the sleeve 6 so as to be integrated with the flexible hose 2 (resin outer tube 4) together with the protrusion 6d on the inner peripheral surface of the sleeve 6. In addition, the appropriate means mentioned above can also be used for the slip prevention processing of the inner peripheral surface.

(7) Seventh step / screwing step of the presser nut The presser nut 7 that is loosely fitted to the flexible hose 2 is moved to the end side (opening side) of the flexible hose 2, and the presser nut 7 The screw 7a and the screw 5d of the central portion 5b of the hose nipple 5 are screwed together and fixed. By this screwing and fixing, the central portion 5b of the hose nipple 5 and the presser nut 7 are fixed, and the sleeve 6 is also fastened and fixed.

  As described above, according to this embodiment, the resin outer tube of the squirrel-cylinder tubular body braided without bonding the strands of the resin monofilament is covered with the resin inner tube while being inserted. A flexible hose is formed, and a cap nut is integrally assembled to the flare end portion of the hose nipple via a stop line, and such parts are prepared in advance in a dedicated factory. Thereafter, such an integrated part is integrated in the end portion of the resin-made flexible hose at the site.

  Then, a metal presser nut is externally fitted and screwed into the hose nipple pulled out from the end of the resin flexible hose, and a sleeve interposed between the presser nut and the resin flexible hose; Is firmly integrated into a flexible hose made of resin. For this reason, in a resin-made flexible hose, while protecting from the interference of the other member of a resin pipe, each metal parts can be connected firmly and reliably to the resin pipe provided with sufficient flexibility. In addition, workability at the construction site can be easily performed, and cost reduction can be achieved.

  It is sectional drawing which shows the edge part of the joint of resin-made flexible hoses.   It is an external view which shows schematic structure of the coupling of resin-made flexible hoses.   It is a disassembled part corresponding view showing a disassembled state of each part.   It is explanatory drawing which shows resin-made sleeves.   It is explanatory drawing which shows metal sleeves.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flexible hose for water supply 2 Flexible hose made of resin 3 Resin inner tube 4 Resin outer tube 5 Hose nipple 6 Sleeve 7 Presser nut 8 Cap nut 9 Stop line

Claims (6)

In the flexible hose made of resin that can be bent in a cylindrical shape,
At the end of the resin-made flexible hose, the mounting portion on one end side of the metal hose nipple is embedded, and the diameter-enlarged center portion of the hose nipple is assembled so as to come in contact with it.
And, on the outer peripheral side of the end portion of the flexible hose, a sleeve that fits the outer peripheral side of the end portion is assembled, and a presser nut that fits the center portion of the hose nipple is further assembled.
At the flare end that is the other end side of the hose nipple, a cap nut is assembled integrally in advance via a stop line,
The resin-made flexible hose is characterized in that the resin-made flexible hose and the hose nipple are integrally and firmly attached to each other in a non-welded state.   2. The resin flexible hose according to claim 1, wherein the sleeve assembled to the end of the flexible hose is made of a resin sleeve, a rubber sleeve, or a metal sleeve.   The resin-made flexible hose is formed by covering a resin outer tube of a cage-like cylindrical body braided without bonding between the strands of a resin monofilament while inserting a flexible resin inner tube. A flexible hose made of resin according to 1 or 2.   The resin-made flexible hose nipple according to claim 1, 2 or 3, wherein the end of the resin-made flexible hose is either a screw-type hose nipple or a nut-type hose nipple on one end side of the incorporated hose nipple. hose.   The resin-made flexible hose according to claim 1, 2 or 3, wherein the inner circumferential surface of the sleeve is subjected to an anti-slip process bonded to the outer circumferential surface of the resin-made flexible hose.   5. The resin according to claim 1, 2, 3, or 4, wherein the anti-slip process applied to the inner peripheral surface of the sleeve is selected from an adhesive coating layer, a protrusion, and a tooth-shaped protrusion. Made of flexible hose.

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