JP2003213740A - Piping system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping system in which excess quality is avoided and a cost can be reduced, ensuring appearance properties. <P>SOLUTION: In the piping system in which water supply pressure is controlled at a predetermined water pressure or less, a joint installed at the end section of piping laid to at least either of the rear of a wall, an underfloor section or an attic space and an instrument mounted in a room are connected by a resin pipe, which is formed of an olefin resin composition and in which a decorative plating is carried out on a surface. Thus, the resin pipe can be used because water supply pressure is controlled at fixed water pressure or less. When the resin pipe is manufactured of the polyolefin resin composition, piping is facilitated in the case of the carrying-out of piping and the resin pipe can be manufactured at a low cost because the characteristics of a member made of polyolefin, the cheapness of workability and a manufacturing cost is displayed. Since a metallic appearance can be obtained by performing the decorative plating on the resin pipe in addition to the easy piping and the manufacture of the resin pipe at the low cost, the piping system has even excellent design properties. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a piping system. More specifically, the present invention relates to a piping system that uses a resin tube that has been subjected to decorative plating.

[Prior art]

In a conventional piping system, water is supplied from an outdoor water main via a steel pipe made of metal to appliances such as kitchens, vanities, and faucets used indoors. In particular, a joint was connected to a steel pipe laid on the inside of a wall or the like, the pipe was taken out to the inside of the room, and the joint and the instrument were connected via a metal pipe. In the conventional piping system, water supply pressure control is often not performed, and high water supply pressure is applied to the entire piping up to the equipment. As a result, the flexible pipe laid inside the room is also made of metal so that it can withstand high water supply pressure. In particular, as the pipe laid inside the room, a flexible pipe made of metal is preferably used so that the pipe can be easily installed.

Besides, since the water supply pipes and drainage pipes connected to appliances used in a bathroom vanity or kitchen are covered with concealed parts such as cabinets, appearance is not required. It was However, in recent years, there have been cases where a highly decorative water supply pipe or drain pipe is used and exposed without being covered with a concealing portion such as a cabinet. For example, a metal flexible tube is plated to improve the appearance quality. However, highly decorative water supply pipes and drain pipes are very expensive because they are metal pipes that have been subjected to decorative plating as described above.

On the other hand, the piping system based on the header construction method has been adopted also in apartment houses such as hotels, buildings and condominiums, and in recent years in detached houses. In the piping system based on this header construction method, in particular, a pressure reducing valve or the like is attached to the header unit to control the water supply pressure in the entire piping system at one hand. The header unit is provided with a header that is connected to a water main pipe and branches a resin pipe that supplies water to each device. This header unit is installed outdoors, under the floor on the first floor, on the ceiling, etc., and the resin pipe branched from it is laid under the wall, under the floor, and under the ceiling. Further, a joint is connected to the end portion of the resin pipe, and the joint and the instrument are connected by the metal pipe (including the flexible pipe) described above. However, in a piping system in which the water supply pressure is controlled to be equal to or lower than a predetermined water pressure, it is not necessary to withstand high water pressure, and the metal pipe is of excessive quality, and the cost is increased.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, it is an object of the present invention to provide a piping system capable of avoiding excessive quality and reducing costs while ensuring appearance. It is a thing.

[0006]

Means for Solving the Problems and Actions / Effects In order to solve the above problems, according to claim 1 of the present invention, in a piping system in which the water supply pressure is controlled to be equal to or lower than a predetermined water pressure, it is possible that The fitting provided at the end of the pipe laid in at least one of them and the equipment installed in the room were connected by a resin tube formed of a polyolefin resin composition and having a surface subjected to decorative plating. It is a piping system characterized by the above.

As described above, since the water supply pressure is controlled to be equal to or lower than the predetermined water pressure, the resin pipe can be used. If the resin pipe is made of a polyolefin-based resin composition, the properties of the polyolefin member, that is, the workability and the low manufacturing cost are exhibited, so that it is easy to pipe at the time of piping construction,
In addition, the resin pipe can be manufactured at low cost. Moreover,
Decorative plating can be applied to this resin pipe to give it a metallic appearance, which is excellent in design.

According to the present invention, in the piping system for supplying water distributed from the main water supply pipe to each device through the header, the resin pipe is branched from the header, and
Underfloor, laid on at least one of the above the ceiling, provided with a joint at the end of the resin pipe, and the fitting and the equipment installed in the room, formed by a polyolefin resin composition, and the surface This is a piping system characterized in that the connection is made with a resin pipe on which decorative plating is applied.

By doing so, the water supply pressure is controlled by the header unit, so that the metal flexible pipe which has been conventionally used is changed to the resin pipe formed by the polyolefin resin composition and subjected to the decorative plating. It can be replaced, avoiding excess quality and reducing costs.

According to a third aspect of the present invention, the pipe system according to the first or second aspect is characterized in that the water distributed from the main water supply pipe is controlled to a predetermined water pressure or less by a pressure reducing valve.

By doing so, the water supply pressure in the piping system is controlled to be equal to or lower than the predetermined water pressure. As a result, it is possible to replace the decoratively-plated resin pipe formed by the polyolefin-based resin composition with a resin pipe that does not require a pressure reducing valve for the faucet that supplies water indoors, avoid excessive quality, and reduce costs. Can be reduced.

According to a fourth aspect of the present invention, there is provided a piping system characterized in that a pipe having a surface of a resin pipe formed of a polyolefin resin composition and a decorative plating is used as a drain pipe.

By doing so, it is possible to provide a drain pipe excellent in design which has been required in recent years at a lower cost than a conventional metal pipe.

According to a fifth aspect of the present invention, there is provided a flexible resin tube made of a polyolefin resin composition, the tube wall of which is formed in a wavy shape in which a certain unevenness is repeated in the tube axis direction. This is a resin tube characterized by having a decorative plating on the surface.

By doing so, it is possible to inexpensively provide a flexible tube having a metallic appearance that makes it easy to perform piping during piping work.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below.

FIG. 1 is a diagram showing a piping system using a header unit. FIG. 2 is a diagram showing a piping system using a resin tube on which the decorative plating of the present invention is applied. FIG. 3 is a diagram showing the relationship between the base material and the plating of the synthetic resin flexible tube of the present invention. FIG. 4 shows a schematic process diagram of plating the synthetic resin molded body of the present invention.

In a piping system in which the water supply pressure is controlled below a predetermined water pressure by a pressure reducing valve 2 or the like attached to the header unit 1, an end portion of the piping 3 laid on at least one of the underside of the wall, the underfloor, and the underside of the ceiling. The joint 4 provided in
This is a piping system in which an instrument 5 installed indoors is connected by a resin tube 6 formed of a polyolefin resin composition and having a surface subjected to decorative plating. In such a piping system in which the water supply pressure is controlled to be equal to or lower than a predetermined water pressure, it becomes possible to use the resin pipe 6, and by adopting the pipe having the surface of the resin pipe 6 subjected to decorative plating, excess quality Can be avoided and the cost can be reduced. Here, the predetermined water pressure is a water supply pressure that allows the user to comfortably supply water when water is supplied from the device 5 connected to the end of the pipe 3, and is, for example, 0.2 MPa to 0.45 M.
Pa preferably indicates 0.25 MPa to 0.3 MPa.

Further, in the present invention, by adopting the resin pipe 6 with the decorative plating for the drain pipe 6b, it is possible to provide a piping system having a metallic appearance and excellent design.

Next, the piping system in the header construction method will be described. This is a piping system that supplies water distributed from the water supply mains 7 to each device 5 through the header 1A. This piping system branches the resin pipe 6 from the header 1A, It is laid on at least one of them, a joint 4 is provided at the end of the resin pipe 6, and the joint 4 and the instrument 5 installed in the room are connected by a resin pipe 6 whose surface is decorative plated. There is. The resin tube 6 is formed of a polyolefin resin composition. Further, this piping system is controlled to a predetermined water pressure or less by the pressure reducing valve 2 connected to the header 1A.

As shown in FIG. 1, a water supply / hot water supply pipe 3 (flexible resin pipe) branched from a header unit 1 (header 1A) installed outdoors or the like is laid. A joint 4 fixed by penetrating a through hole 8 such as a wall is connected to the end portion. Further, a resin pipe 6 for supplying water and hot water to each appliance 5 such as a bathroom, a vanity, a kitchen, a washing machine and a toilet is connected to the joint 4.

Next, the pipe 6 for a vanity, kitchen, etc.
A case will be described with reference to FIG. 2 in which a resin pipe 6 subjected to decorative plating is used as the drain pipe 6b and the resin pipe 6 is used in an exposed place on the indoor side. As shown in FIG. 2, by controlling the water supply pressure in the pipe to the back of the wall to a predetermined water pressure, the flexible resin pipe 6 can be used for the pipe 3 on the back of the wall. Further, it is possible to preferably use the resin tube 6 that has been subjected to the decorative plating, in particular, the resin tube 6 that has been subjected to the decorative plating having flexibility in which the tube wall is formed in a corrugated shape that repeats certain irregularities in the tube axis direction. . In this way, when the water supply pressure is equal to or lower than the predetermined water pressure, the resin pipe 6 can be used, so that the resin pipe 6 can be provided at low cost, and since the resin pipe 6 is subjected to the decorative plating, the design is excellent. Even if it is used not in the concealed portion but in a visible place as shown in the figure, the appearance is not impaired.

Next, a synthetic resin molded body which is a base material of the resin pipe 6 will be described. The synthetic resin constituting the synthetic resin molded body is not particularly limited as long as it is a polyolefin compound, and examples thereof include high density, medium density, low density polyethylene and linear low density polyethylene, ultra high molecular weight polyethylene, ethylene-vinyl acetate. Polyethylene such as copolymer, propylene homopolymer, propylene-ethylene block copolymer and random copolymer, polypropylene such as propylene-ethylene-diene compound copolymer,
Examples thereof include polybutene-1 and poly-4-methylpentene-1.

In the present invention, the plating property is improved by appropriately mixing an acid-soluble inorganic substance (for example, calcium carbonate, magnesium carbonate, magnesium hydroxide, etc.) in this synthetic resin.

Further, in the present invention, a cationic surfactant is mixed in the synthetic resin for the purpose of omitting the polarity imparting step during plating and simplifying the operation. As the cationic surfactant, conventionally known ones such as amine salt and quaternary ammonium salt can be used.

The method of kneading the resin composition is not particularly limited, and a conventionally known method such as a tumbler, a V-type blender, or the above-mentioned components may be used simultaneously or in any order.
Nauter mixer, Banbury mixer, kneading roll,
It can be manufactured by mixing with a mixer such as an extruder.

Further, within a range not impairing the object of the present invention,
In addition to synthetic resins, acid-soluble inorganic substances and cationic surfactants, it also includes flame retardants, antioxidants, UV absorbers, mold release agents, antistatic agents, foaming agents, dyes and pigments that are commonly used in resin compositions. There is no problem even if it is.

The method for plating the synthetic resin molding is the same as the conditions for chemical plating and electroplating for general ABS resin. Therefore, the plating method of the present invention is performed by degreasing, chemical etching, chemical plating treatment and electroplating treatment, and treatments such as neutralization treatment, catalyst treatment and activator treatment can be appropriately combined.

FIG. 4 illustrates a method of plating the synthetic resin molding of the base material. It is preferable to use a surfactant for degreasing, to carry out degreasing and washing at a treatment temperature of 40 ° C. to 60 ° C. for a time of about 5 to 20 minutes. For the etching, a mixed solution of an oxidizing agent and an acid, for example, a chromic acid-sulfuric acid solution is used. The treatment temperature is preferably 60 ° C. to 75 ° C., and the time is preferably 3 minutes to 20 minutes. (FIG. 4 (A)) After etching, a sensitizer treatment of adding a metal having a strong adsorptive power and a reducing power to the hydrophilic surface is performed. (FIG. 4 (B)) After washing with water (FIG. 4 (C)), an activator treatment for adding a catalyst for the purpose of promoting a chemical reaction (reduction action) of copper and nickel metal ions in the electroless plating bath I do.
(FIG. 4 (D)) After washing with water, a chemical plating process is performed to perform copper plating or nickel plating on the surface of the resin. FIG. 4E shows the case where copper plating is applied. After the synthetic resin molded body is chemically plated by such a method, electroplating treatment of copper, nickel, chromium or the like is further performed to obtain a plated decorative synthetic resin member. In addition, in the test body described below, copper plating was performed by chemical plating, nickel plating was performed on the copper plating, and then chromium plating was performed. Alternatively, nickel plating may be performed, and then chromium plating may be performed.

[0029]

As described above, according to the present invention, it is possible to provide a piping system capable of avoiding excessive quality and reducing costs while ensuring appearance. That is, since the water supply pressure is controlled to be equal to or lower than the predetermined water pressure, the resin pipe can be used as the pipe on the indoor side. If the resin pipe is made of a polyolefin-based resin composition, the properties of the polyolefin member, that is, the workability and the low manufacturing cost, are exhibited.
It is easy to pipe at the time of piping construction, and the resin pipe can be manufactured at low cost. In addition, since the metal appearance can be provided by applying a decorative plating to this resin pipe, it is also excellent in design. Since the resin tube is formed from the polyolefin resin composition and the decorative plating is applied, the plating of the resin tube is difficult to peel off even if a small invisible crack occurs when it is bent. Therefore, it is possible to maintain a metallic appearance excellent in designability for a long period of time.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a piping system using a header unit.

FIG. 2 is a schematic diagram showing a piping system using a resin tube on which the decorative plating of the present invention is applied.

FIG. 3 is a diagram showing the relationship between the base material and the plating of the synthetic resin member of the present invention.

FIG. 4 is a schematic process diagram of plating the synthetic resin molding of the present invention.

[Explanation of symbols]

1 Header unit 1A header 2 Pressure reducing valve 3 piping 4 joints 5 appliances 6 resin tubes 6a piping 6b drain pipe 7 water supply pipe 8 through holes

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Akira Kobayashi             2-1-1 Nakajima, Kokurakita-ku, Kitakyushu City, Fukuoka Prefecture             No. Totoki Equipment Co., Ltd. F-term (reference) 2D060 AC01                 2D061 AB10 AC10                 3H111 AA02 BA15 CA42 CB05 CB14                       CB23 DB03 DB05

Claims (5)

[Claims] 1. A piping system in which a water supply pressure is controlled to be equal to or lower than a predetermined water pressure, a joint provided at an end of a pipe laid on at least one of a wall back, an underfloor, and a ceiling, and a device installed indoors. A piping system comprising: a resin pipe formed of a polyolefin-based resin composition; and a resin pipe whose surface is subjected to decorative plating. 2. In a piping system for supplying water distributed from a main water supply pipe to each device via a header, a resin pipe is branched from the header, and the resin pipe is at least one of a back wall, an underfloor, and a ceiling. Laying on either side, further, a joint is provided at the end of the resin pipe, and the joint and the equipment installed indoors are formed of a polyolefin resin composition, and the surface is subjected to decorative plating. A piping system characterized by connecting with resin pipes. 3. The water distributed from the water supply main is controlled to a predetermined water pressure or less by a pressure reducing valve.
Or the piping system according to 2. 4. A piping system, wherein a pipe having a surface of a resin pipe formed of a polyolefin resin composition and having decorative plating is used as a drain pipe. 5. A flexible resin tube made of a polyolefin-based resin composition, the tube wall of which is formed in a corrugated shape that repeats certain irregularities in the tube axis direction, and the surface of the resin tube is decorative plated. A resin tube characterized by being subjected to.