JPH0788977A - Manufacture of flexible tube for unwinding sprinkler facility pipeline - Google Patents

Abstract

PURPOSE:To increase the strength of a flexible tube and reduce the cost of the same by a method wherein both ends of the flexible tube and a blade as well as the connecting terminal of a reducer and/or a nipple are screwed into a ring through curing agent, having bonding effect, under a condition that both of them are abutted against each other, and the curing agent is hardened. CONSTITUTION:The title manufacturing method is constituted of the inserting process of both ends of a flexible tube 7 and a blade 8, covering the outside of the flexible tube 7, into a hollow ring from one side through curing agent, another process, screwing the connecting terminal of a reducer 9 or a nipple for mounting a sprinkler head into a hollow ring from the opposite side through the same curing agent to abut the tip end thereof against the tip end of the flexible tube 7, and the other process of curing the curing agent by heating it thereafter. According to this method, the flexible tube 7 for unwinding a sprinkler facility pipeline, which will never be affected by welding heat and which is highly accurate, durable and low in cost, can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a flexible tube for unwinding a sprinkler equipment pipe connected between a pipe and a head of a sprinkler. The durability and strength of the flexible tube and the sealing property thereof are improved. At the same time, the purpose is to reduce the manufacturing cost.

[0002]

2. Description of the Related Art A conventional flexible tube for unwinding a sprinkler equipment pipe includes a flexible tube, a blade and a connecting screw, which are welded together at their respective ends (Actual No. 60-10662), and a flexible tube. The outer ends of the base are fitted with the caps, and both ends of the blade covered with the flexible tube are fitted to the outer periphery of the cap, and the both ends of the blades are fixed by rings, so-called plastic working Those which have been subjected to (Jitsuko Sho 58-46835) and the like are known.

[0003]

However, in the former case, not only pinholes are easily formed in the welded portion, but also a large heating stress is applied to the welded portion, which easily causes corrosion, which is a major cause of water leakage. Becomes Also in the latter case, the residual stress in the plastically worked portion promotes corrosion, which also increases the possibility of breakage and water leakage.

[0004]

Therefore, in the present invention, various problems in the above-mentioned prior art are solved, and the cause of corrosion is reduced to prevent destruction and leakage of water, and to achieve high sealability. The durability is improved by ensuring high tensile strength, and the manufacturing cost is reduced. Specifically, both ends of the flexible tube and the blade covering the outer side of the flexible tube are hardened with a hardening material. And the connecting end of the reducer or nipple for attaching the sprinkler head to the inside from the opposite side of the hollow ring through a hardening material. The step of screwing the tip of the flexible tube into the tip of the flexible tube and crushing it, and then heating The method for manufacturing a sprinkler flexible tube for Piping unwinding comprising a step of curing the cured material.

The present invention also provides a hardening material interposed between both ends of the flexible tube and the blade covering the outside thereof and the hollow ring, and between the connecting end of the reducer or nipple and the hollow ring. Also relates to a method of manufacturing a flexible tube for unwinding a sprinkler facility pipe, which uses a curable resin.

Further, according to the present invention, a connecting end of a reducer or a nipple for attaching a sprinkler head is screwed into the inside from the opposite side of the hollow ring through a hardening material so that the tip is connected to the tip of the flexible tube. The invention also relates to a method for manufacturing a flexible tube for unwinding a sprinkler equipment pipe, in which, in the case of butting, the tip of the flexible tube is butted and further screwed to crush the tip of the flexible tube.

Further, according to the present invention, the step of inserting both ends of the flexible tube and the blade covering the outside thereof into the inside from one side of the hollow ring via the hardening material is performed on the inner surface of the hollow ring. The present invention also relates to a method for manufacturing a flexible tube for unwinding a sprinkler equipment pipe which is screwed into a screw-shaped groove.

Furthermore, the present invention is a sprinkler facility in which the free end of a ring covering the end of a flexible tube and the blade covering the outside thereof is caulked inward to the extent that it abuts the outer peripheral surface of the blade. It also relates to a method of manufacturing a flexible tube for unwinding a pipe.

[0009]

Operation: After inserting both ends of the flexible tube and the blade covering the outside thereof from one side of the hollow ring through the hardening material, the connecting end of the reducer or nipple for attaching the sprinkler head. Is also screwed in from the opposite side of the above-mentioned hollow ring through a hardening material to bring the tip into contact with the tip of the flexible tube described above, and crush the tip of the flexible tube, and then heat to cure the inside. By curing the material, the flexible tube and the blade covering the outer side of the flexible tube, and the connecting end and the ring of the reducer or the nipple are integrally combined.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The concrete contents of the present invention will be described below with reference to the embodiment shown in FIG. 1. 1 is a hollow ring, 7 is a flexible tube, 8 is a blade for coating the outside of the flexible tube 7, Reference numeral 9 represents a reducer for mounting the sprinkler head. The flexible tube 7 can be flexibly bent by constructing a stainless steel tubular body in the lengthwise direction one after another in a bellows shape, and the blade 8 also has a large number of thin stainless wires braided vertically and horizontally. To form a tubular body, and is configured to cover and reinforce the outer peripheral surface of the flexible tube 7.

Further, the reducer 9 has a spiral male screw portion 10 formed on the outer peripheral surface of its mounting end edge, and a relatively thin-walled extension portion 11 formed from the mounting end edge in the axial direction of the tip end. Has been done. Further, the ring 1 is made of a material such as stainless steel, iron, brass, or cast metal, has a hollow inner cylindrical body, and is molded to a size capable of covering the ends of both the flexible tube 7 and the blade 8. Moreover, the edge portion of the one opening 1a is formed into a tapered thin wall to form the flange 4 extending in the axial direction, and at the inner depth of the opening 4a closer to the opening 1a than the center. The thread groove 2 and the groove 3 for receiving the hardened material P are formed to such an extent that the bellows-shaped protrusion of the flexible tube 7 can be inserted.

Further, a female screw portion 5 corresponding to the male screw portion 10 of the reducer 9 and a groove 6 for receiving the hardened material P are formed in the ring 1 closer to the other opening 1b side. Next, the process of integrating the flexible tube 7 and the blade 8 and the reducer 9 into the ring 1 will be described. First, the thread groove 2 of the ring 1
The hardening material P is applied to the entire inner peripheral surface including the groove 3, the flange 4, the female screw portion 5, and the groove 6, respectively, and further, the hardening material P is applied to the outer peripheral surface of the connection end portion of the flexible tube 7. Is inserted inside one opening 1a of the ring 1, and the outer peripheral surface of the flexible tube 7 is screwed along the thread groove 2 of the ring 1 until the tip abuts.

In this case, if necessary, not only the flexible tube 7 but also the blade 8 for covering the outer side of the flexible tube 7 is coated with the hardening material P over the end portions of both members, and this is applied to the ring 1. If it is inserted into and bonded to the substrate, the bonding strength is further improved. Next, the hardening material P is similarly applied to the outer peripheral surface of the connecting end portion of the reducer 9, and the extension portion 11 is screwed inward from the other opening portion 1b of the ring 1 described above, and the flexible tube 7 whose tip is described above is screwed inward. The tip end of the flexible tube 7 is crushed by abutting the tip end of the flexible tube 7 (see FIG. 2). In this case, the tip extension 11 of the reducer 9 enters the inner peripheral side of the flexible tube 7 to prevent the hardened material P from protruding from the abutting portion.

Thereafter, the flexible tube 7 and the blade 8 and the reducer 9 and the ring 1 are entirely heated at a predetermined temperature to cure the hardening material therein, whereby the flexible tube 7 and the blade 8 and the reducer 9 are cured. And the ring 1 is integrally connected to each of the connection ends.

The curing material P used in the present invention is a rubber or acrylic one-component thermosetting resin or an epoxy or other two-component room temperature curable resin, or a high temperature material such as ABS or PBT. It is possible to select from a wide range of adhesive materials such as liquefied room temperature curing molding resin and one-pack type epoxy resin.

Further, if necessary, the flange 4 of the ring 1
If the blade 8 and the flexible tube 7 are fixed to each other by crimping the blade 8 to the inside so as to contact the outer peripheral surface of the blade 8, the strength can be further increased. In this case, a caulking type (not shown) that can be split into two is used, the small diameter part of the caulking type is fitted into the pedestal, and the flexible tube 7 filled with the hardening material P is swung with the blade 8 side at the top. The flange 4 of the ring 1 is abutted against the inner sloped portion, and the flange 4 of the ring 1 is press-fitted into the swaged mold by the press head from the side of the opening of the crimping mold to press the flange 4 into the slanted inner face. It is good to crimp inside by deforming along.

[0017]

According to the present invention, as described above, both ends of the flexible tube and the blade covering the flexible tube are
The step of inserting the hollow ring from one side through the hardening material and the connecting end of the reducer or nipple for mounting the sprinkler head from the opposite side of the hollow ring also through the hardening material. Since it consists of a step of collapsing the tip of the flexible tube into the tip portion of the flexible tube by screwing it into the inside and a step of subsequently heating to cure the hardened material, conventional welding etc. It is possible to reduce the cost because it is troublesome and does not require many skillful steps.

Further, there is no risk of pinholes or corrosion due to welding heat, and there is no risk of water leakage, and there is no residual stress due to plastic working. Therefore, the sealability is good and there is no risk of damage or water leakage. It is possible to obtain a flexible tube for unwinding a high-strength and high-strength sprinkler equipment pipe.

Further, in the case where the connecting end of the reducer or nipple for mounting the sprinkler head is screwed into the inside from the opposite side of the hollow ring through a hardening material and the tip is made to abut the tip of the flexible tube described above. , If the end of the flexible tube is crushed by further screwing the end after abutting against the end of the flexible tube, a flexible tube for unwinding the sprinkler equipment pipe with more complete sealing property and high strength is obtained. be able to.

When both ends of the flexible tube and the blade covering the outside of the flexible tube are loaded into the inside from one side of the hollow ring via a hardening material, a screw-shaped groove formed on the inner surface of the hollow ring. When it is screwed in, the connection between the flexible tube and the ring becomes stronger and the strength is further improved.

Further, in the case where the free end (flange) of the ring covering the end of the flexible tube and the blade covering the outer side of the flexible tube is crimped to the inside so as to contact the outer peripheral surface of the blade. Can further improve the overall bonding strength.

Further, when an extension portion is formed at the tip of the reducer so as to be inserted into the inner peripheral side of the flexible tube to which the extension portion is joined, the inside of the hardened material is extruded from the abutting portion of the reducer and the flexible tube. Therefore, a flexible tube for unwinding the sprinkler equipment pipe can be obtained.

[Brief description of drawings]

FIG. 1 is a half-cut sectional view showing a disassembled main part showing an assembling procedure of each component constituting a flexible tube for unwinding a sprinkler facility pipe according to an embodiment of the present invention.

FIG. 2 is an enlarged half-cut sectional view of essential parts in a state where respective parts are joined together from the state of FIG.

[Explanation of symbols]

 1 ring 1a opening part 1b opening part 2 screw groove 3 groove 4 flange 5 female screw part 6 groove 7 flexible tube 8 blade 9 reducer 10 male screw part 11 extension part P hardening material

Claims (5)

[Claims] 1. A step of loading both ends of a flexible tube and a blade covering the flexible tube into the inside from one side of a hollow ring through a hardening material, and connecting a reducer or a nipple for mounting a sprinkler head. From the step of screwing the end portion into the inside from the opposite side of the above-mentioned hollow ring through the same hardening material and bringing the tip into contact with the tip portion of the above flexible tube, and then heating to cure the hardening material. Method for manufacturing flexible tube for unwinding sprinkler equipment pipe. 2. A hardening material interposed between both ends of the flexible tube and the blade covering the flexible tube and the hollow ring, and between the connecting end of the reducer or nipple and the hollow ring is hardened. The method for producing a flexible tube for unwinding a sprinkler equipment pipe according to claim 1, wherein a mold resin is used. 3. A case where a connecting end of a reducer or a nipple for mounting a sprinkler head is screwed into the inside from the opposite side of a hollow ring through a hardening material so that the tip is abutted with the tip of the flexible tube. 2. The method for manufacturing a flexible tube for unwinding a sprinkler equipment pipe according to claim 1, wherein the flexible tube is unwound further after being abutted against the distal end of the flexible tube to crush the distal end of the flexible tube. 4. The step of loading both ends of the flexible tube and the blade covering the outside thereof into the inside from one side of the hollow ring via a hardening material is a screw-shaped step applied to the inner surface of the hollow ring. The method for producing a flexible tube for unwinding a sprinkler facility pipe according to claim 1, wherein the flexible tube is screwed into the groove. 5. A flexible tube and a free end of a ring covering the ends of a blade covering the flexible tube,
The method for producing a flexible tube for unwinding a sprinkler equipment pipe according to claim 1, wherein the blade is crimped inside so as to come into contact with the outer peripheral surface of the blade.