JP2598032Y2 - Flexible tube for sprinkler mounting - Google Patents

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 sprinkler mounting flexible tube connected between a pipe and a sprinkler head, and aims at improving the durability, strength and sealing property of the flexible tube. And

[0002]

2. Description of the Related Art A conventional flexible tube for attaching a sprinkler includes a flexible tube, a blade, and a connection screw which are welded together at their ends (Japanese Utility Model Application Laid-Open No. 60-10662), and both ends of a flexible tube. After fitting the base to the outside, and fitting both ends of the blade covered with the flexible tube to the outer periphery of the base, the both ends of the blade were fixed with a ring, so-called plastic working was performed. (Japanese Utility Model No. 58-46835) and the like are known.

[0003]

[Problems to be Solved by the Invention] However, in the former case, not only a pinhole is easily formed in the welded portion, but also a large heating stress is applied to the welded portion, so that the welded portion is easily corroded. Becomes Even in the latter case, the residual stress in the plastically worked portion promotes corrosion, and the possibility of breakage and water leakage also increases.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention solves the above-mentioned various problems in the prior art, and prevents the occurrence of destruction and water leakage by reducing the cause of corrosion. It is designed to improve durability by securing high tensile strength,
Specifically, a flexible tube, a blade for covering the outside of the flexible tube, and a ring for covering both ends of the flexible tube and the blade, the ring having a blade pressing member on one edge thereof. While extending, the ring is filled with hardening material between the inner flexible tube via a blade,
Further, the present invention relates to a flexible tube for attaching a sprinkler, wherein the free end of the blade pressing member is narrowed down to the inner diameter side and pressed against the blade.

[0005]

[0006]

[0007]

[0008]

The end of the flexible tube and the end of the blade are integrally joined to the ring by a hardening material, so that no heating stress or residual stress is generated at the joint. As a result, it is possible to eliminate the occurrence of pinholes at the joint portion, the destruction due to corrosion, and the problem of water leakage.
In addition, the free end of the blade pressure contact member extending to one edge of the ring is narrowed down to the inner diameter side and pressed against the blade, so that high sealing performance and high tensile strength can be secured, so that the ring, blade and flexible tube can be secured. Are completely integrated.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific contents of the present invention will be described below with reference to the embodiment of FIG. 1. 1 is a flexible tube, 2 is a blade, 3 is a ring for connecting to a sprinkler head or piping, and 4 is a ring. Represents the hardener. The flexible tube 1 can be flexibly bent by sequentially forming a stainless steel cylindrical body in a bellows shape in the longitudinal direction, and the blade 2 is formed by braiding a number of thin stainless steel wires vertically and horizontally. Without a cylindrical body
The outer peripheral surface of the flexible tube 1 is configured to be covered and reinforced.

The ring 3 is made of a material such as stainless steel, iron, brass, casting or the like.
It is molded into a size that can cover the ends of both members of the blade 2 and the blade 2. The outer peripheral surface is provided with a screw portion 3b, and on one side thereof, a flange 3a that extends inward in the axial direction is provided. And a blade pressing member 3c on the opposite side edge.
Is extended.

The hardening material 4 may be a one-part thermosetting resin such as a rubber or acrylic resin, a two-part room-temperature curing resin such as an epoxy resin, or a high-temperature liquefied room-temperature curing molding resin such as ABS or PBT. Or a wide range of adhesive materials such as one-pack type epoxy resin.

A specific example in which both ends of a flexible tube 1 and a blade 2 covering the outside thereof are integrally connected to a ring 3 which is covered with ends of both members 2.4 via a hardening material 4. A typical process will be described with reference to the process chart of FIG. 2 and the following drawings. First, in order to reinforce the end of the flexible tube 1, a wire X is circumferentially inserted into a concave portion of about 1 to 3 peaks from the end. After that, the part is crushed (see FIG. 2).

Next, the end of the flexible tube 1 covered with the blade 2 is inserted into the ring 3 until it comes into contact with the flange 3a, and the end of the tube 1 avoiding the blade 2 and the flange 3a of the ring 3 are inserted. TIG welding W is performed (see FIG. 3). Next, the blade 2 is shifted in the direction away from the ring 3 along the length direction of the tube 1, and a hardening material is inserted between the tube 1 and the inner surface of the ring 3 by using a hardening material insertion means such as a hardening material press-in pump P. 4 was inserted (see FIG. 4), the blade 2 was again shifted into the ring 3, and its end was immersed in the filled hardening material 4 and left as it was for a certain period of time. By hardening the hardening material 4, the flexible tube 1, the blade 2 and the flange 3 are integrally joined together. (See FIG. 5).

Further, using a crimping mold 6 which can be divided into two,
The small diameter portion 6a of the caulking mold is fitted into the pedestal 5, and the flexible tube 1 filled with the hardening material 4 is inserted from the opening of the caulking mold 6 with the blade 2 side at the top, and the free end 3c of the ring 3 is attached. The press head 8 is brought into contact with the inner inclined portion 7 and from the side of the opening of the caulking mold 6.
The flange 3a of the ring is pressed into the crimping die 6 so that the free end of the blade pressing member 3c is
Squeezing to the inner diameter side along the inner surface inclined portion 7 and deforming it,
The tip is press-fitted to the blade 2 (see FIG. 5).

[0015]

According to the present invention, as described above, the flexible tube and both ends of the blade covering the outside thereof,
Since the hardening material is filled and hardened between the two members and the ring that covers the ends, they are joined together, so there is no risk of pinholes or corrosion due to welding heat, and there is a risk of water leakage. Thus, there is no residual stress due to plastic working, and therefore, a highly durable and high-strength flexible tube for attaching a sprinkler, which has good sealing properties and is free from breakage or water leakage, can be obtained.

In addition, since the free end of the blade pressing member extending to one end of the ring is narrowed down to the inner diameter side and pressed against the blade, high sealing performance and high tensile strength can be secured. The ring, the blade and the flexible tube are completely integrated, and the durability is remarkably improved as compared with the ready-made product.

[Brief description of the drawings]

FIG. 1 is a half sectional view of a main part of a flexible tube for attaching a sprinkler according to an embodiment of the present invention.

FIG. 2 is an exploded half sectional view showing a processing step of the flexible tube for attaching a sprinkler according to the present invention.

FIG. 3 is a half sectional view of a main part showing a processing step of the flexible tube for attaching a sprinkler according to the present invention.

FIG. 4 is a main part half sectional view showing a state of injection of a hardening material, showing a processing step of the flexible tube for attaching a sprinkler according to the present invention.

FIG. 5 is a cross-sectional view of a main part of the flexible tube for attaching a sprinkler according to the present invention, which is inserted into a press in order to crimp a free end of a ring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible tube 2 Blade 3 Ring 3a Flange 3b Screw part 3c Free end 4 Hardening material 5 Pedestal 6 Caulking type 6a Small diameter part 7 Inner inclined part 8 Press head

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16L 33/00 A62C 35/68

Claims (1)

(57) [Scope of request for utility model registration] 1. A flexible tube, a blade for covering the outside of the flexible tube, and a ring for covering the ends of both the flexible tube and the blade. Along with extending the member, the ring is filled with a hardening material between the inner flexible tube via a blade, and the free end of the blade pressing member is narrowed down to the inner diameter side, and the blade is pressed and crimped to the blade. A flexible tube for attaching a sprinkler.