JPH05118490A - Silencing drain pipe - Google Patents

Abstract

PURPOSE:To provide a drain pipe having the capability of preventing the occurrence of a large water flow sound, even when waste water is made to flow through the drain pipe. CONSTITUTION:A drain pipe is constituted of at least four layers, and an inner layer is made of a hard synthetic resin pipe. An air layer having space divided with split rings, a glass wool layer or a synthetic resin foam layer is positioned at the outside of the inner layer. In addition, a resin sheet containing lead fiber is laid at the outside of the foam layer or the like, and a metal pipe is positioned at the outermost side. In this case, these four layers are integrated with each other via the drawing of the metal pipe as an outer layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound deadening drainage pipe. More specifically, the present invention is
The present invention relates to a drainage pipe having an advantage that noise of water generated when the wastewater is dropped through the pipe is attenuated or disappeared, and the drainage can be gently performed.

[0002]

2. Description of the Related Art In old buildings, cast iron pipes were used for drainage. However, cast iron pipes have drawbacks such as poor flow of water and heavy construction which makes it difficult to construct and the weight of the building cannot be reduced. Therefore, hard synthetic resin pipes have been used instead of cast iron pipes for drainage. Among the hard synthetic resin tubes, particularly hard vinyl chloride resin tubes have come to be used.

However, the hard synthetic resin pipe has a drawback that when the waste water is dropped through this pipe, the sound of the waste water flowing reverberates to the outside. This drawback is particularly remarkable when draining water in a condominium at night. Therefore, apartments were requested to refrain from draining at night, and sometimes draining at night was prohibited. However, having to refrain from drainage at night is a pain for condominium consumers. Therefore, the emergence of a drainage pipe that does not produce a loud noise was demanded.

Attempts have also been made to attenuate the drainage sound. For example, existing hard synthetic resin pipes have been fixed with concrete or surrounded by glass wool. However, this was not enough. Therefore, a lead plate has been wound around the outer wall of the hard synthetic resin tube. Recently, it has been attempted to wind a resin sheet containing lead fibers instead of the lead plate. A resin sheet containing lead fibers is a non-woven fabric made of lead fibers sandwiched between resin sheets. This provided some degree of silencing effect. However, I was still not satisfied.

The above-mentioned attempts to dampen the drainage sound have only been made to existing pipes. In other words, there is no sound-deadening drainage pipe on the market, which has already been subjected to a sound deadening treatment before piping, and the sound deadening effect can be immediately obtained by just piping this.

[0006]

SUMMARY OF THE INVENTION The present invention seeks to provide a sound deadening drainage pipe. That is, an object of the present invention is to provide a drainage pipe in which a sound deadening effect can be immediately obtained by simply piping.

[0007]

The inventor of the present invention wound a lead-containing resin sheet around a hard resin pipe, inserted the wound product into an aluminum pipe, and drawn out the aluminum pipe to An attempt was made to integrate the three layers. Then, it was confirmed that, in the obtained composite pipe, the hard resin pipe and the aluminum pipe were firmly integrated with each other with the lead-containing resin sheet interposed therebetween, and as a result, the composite pipe had a sound deadening property. Moreover, the composite pipe thus obtained is easy to cut the outer pipe of the aluminum pipe and the lead plate or the lead-containing resin sheet, and when the composite pipe is cut, only the hard resin pipe is exposed immediately. It has been found that the pipes can be easily connected like the conventional drain pipes.

The present inventor also tried to interpose an air layer between the hard resin tube and the lead plate or the lead-containing resin sheet. That is, a ring that acts as a spacer is attached to the outer surface of the hard resin tube, and the lead-containing resin sheet is wound on this outer surface while leaving the surface of the hard resin tube between the ring and the ring empty, The wound product was inserted into an aluminum pipe, and then the aluminum pipe was drawn to make a four-layer composite pipe including an air layer. Then, it was found that the obtained composite pipe was more excellent in sound deadening effect than the three-layer pipe. Also,
It has been found that this composite tube having four layers is further excellent in sound deadening when a glass wool or polyethylene foam sheet is wound around the air layer.

Further, the inventor of the present invention, if the ring is made of a hard material and a cut is provided in the ring so that the inner diameter of the ring can be reduced, when the aluminum pipe is drawn, the ring is drawn. It has been found that a strong composite pipe can be obtained, which can be brought into close contact with both the hard resin pipe and the lead fiber-containing resin sheet, and in which the air layer, the glass wool layer or the polyethylene foam sheet layer is contained. The present invention has been completed based on such knowledge.

According to the present invention, a notched ring made of a hard material is fitted in some places on the outer surface of the hard resin pipe, and the remaining outer surface of the hard resin pipe is emptied or glass wool or Roll the synthetic resin foam, roll the resin sheet containing lead fiber on it, insert this roll into the metal pipe, and apply pressure to the outer surface of the metal pipe to reduce the inner diameter of the metal pipe. , Characterized in that the metal pipe is integrated with the hard resin pipe,
It provides a sound-deadening drainage pipe.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the silencing drainage pipe according to the present invention will be described with reference to the drawings as follows. 1 and 2 are partially cutaway perspective views of a sound deadening drainage pipe according to the present invention. FIG. 3 is a front view of the ring used in the present invention. FIG. 4 is a partially cutaway perspective view of the lead fiber-containing resin sheet used in the present invention. FIG. 5 is a perspective view showing a method for connecting a sound deadening drainage pipe according to the present invention.

In FIGS. 1 and 2, 1 is a hard resin pipe,
Reference numeral 2 is a ring, 3 is a synthetic resin foam or glass wool mat, 4 is a lead fiber-containing resin sheet, and 5 is a metal pipe.

In the sound deadening drainage pipe according to the present invention, as shown in FIG. 1, for example, a ring 2 is fitted in some places on the outer surface of the hard resin pipe 1, and the remaining outer surface of the hard resin pipe 1 is emptied. In addition, the lead fiber-containing resin sheet 4 is wound on the metal pipe 5, the rolled product is inserted into the metal pipe 5, and the inner surface of the metal pipe 5 is reduced by applying pressure to the outer surface of the metal pipe 5. 5 is integrated with the hard resin pipe 1.

Further, in the sound deadening drainage pipe according to the present invention, as shown in FIG. 2, the outer surface of the hard resin pipe 1 between the rings 2 and 2 is not emptied, and the synthetic resin foam is provided therein. It may be a roll of 3 or glass wool mat. In the sound deadening drainage pipe shown in FIG. 2, a ring 2 is fitted in some places on the outer surface of the hard resin tube 1, a synthetic resin foam 3 is wound around the remaining outer surface of the hard resin tube 1, and lead is further applied to the ring. The resin sheet 4 containing fibers is rolled, the rolled product is inserted into the metal pipe 5, and thereafter the pressure is applied to the outer surface of the metal pipe 5 to reduce the inner diameter of the metal pipe 5, thereby making the metal pipe 5 a hard resin pipe. It is integrated with 1.

As the hard resin pipe 1, the one that has been used as a drainage pipe can be used as it is. That is, a hard vinyl chloride resin pipe, a polyethylene pipe, a polypropylene pipe, a polybutene pipe or the like can be used. These pipes can be easily connected to each other by sleeve connection or by using suitable joints and have been used as drainage pipes so far.

The ring 2 is fitted in various places on the outer surface of the hard resin pipe 1. The ring 2 is made of a hard material. As the hard material, vinyl chloride resin, polyethylene, polypropylene, polyester, polyamide, polycarbonate, iron and other metals can be used.

The ring 2 is provided with a cut 21 as shown in FIG. The thickness of the ring 2 in the diameter direction, that is, the thickness T shown in FIG. 3, is equal to the thickness of the glass wool mat or synthetic resin foam 3 wound around the outer surface of the resin tube 1 in FIG. The inner diameter R of the ring 2 is
It is preferable that the outer diameter of the resin pipe 1 is set to be slightly smaller than the outer diameter of the resin pipe 1 so that the ring 2 stops on the resin pipe 1 due to its elasticity. Further, it is desirable that the cross section of the ring 2 be a right-angled quadrilateral, and that the width of the ring 2 be equal to or larger than the thickness T of the ring 2 in particular. This is desirable because when the ring 2 is fitted on the resin pipe 1, the inner surface of the ring 2 comes into close contact with the outer surface of the resin pipe 1 and the ring 2 is stably held on the resin pipe 1.

Glass wool is a cotton-like material of short glass fibers having a thickness of several microns. The glass wool may be formed into a tape and wound around the outer surface of the resin tube 1 in a spiral shape. However, the glass wool is formed into a wide flat surface and cut into a right-angled quadrilateral to face the right-angled quadrilateral. The set of sides may be oriented parallel to the axial direction of the resin pipe 1, and the resin pipe 1 may be wound as shown by numeral 3 in FIG. 2 to extend the joint in the axial direction of the resin pipe 1. The roll may be double or more than single.

Various kinds of synthetic resin foams can be used. The foam is preferably closed cell. For example, polyethylene foam, soft vinyl chloride resin foam, polyurethane foam and the like can be used. Like the glass wool, the foam may be formed into a tape and wound around the outer surface of the resin tube 1 in a spiral shape. Alternatively, the foam may be cut into a right-angled quadrangle so that the seam extends in the axial direction of the resin tube 1. You may roll it like this. Moreover, the number of turns may be double or more instead of single.

It is desirable that the glass wool or synthetic resin foam 3 is wound so as to cover the entire portion of the outer surface of the resin tube 1 except where the ring 2 is fitted. Further, it is preferable that the thickness of the glass wool or the foam 3 is substantially equal to the thickness of the ring 2. It is desirable that the ends of the glass wool or the foam thus wound are temporarily fixed by adhering the ends with an adhesive tape.

In the present invention, the ring 2 is fitted in some places of the hard resin pipe 1, the outer surface of the remaining resin pipe 1 is left empty, or the glass wool or the foam 3 is formed on the outer surface of the remaining resin pipe 1. After winding, the resin sheet containing lead fibers is further wound thereon. The lead fiber-containing resin sheet is a mat or cloth made of lead fibers and is sandwiched between soft synthetic resin sheets to be integrated. The lead fiber-containing sheet may be formed into a tape shape and wound in a spiral shape, or may be cut into a right-angled quadrilateral shape and wound so that the seam extends in a straight line.

FIG. 4 shows an example of the lead fiber-containing resin sheet. In FIG. 4, the lead fiber 42 is woven into a cloth,
A lead fiber-containing resin sheet 4 in which the cloth is sandwiched between soft vinyl chloride resin films 43 to be integrated is shown.
Such a lead fiber-containing resin sheet 4 is already commercially available, for example, from Toray Industries, Inc. under the trade name of "soundproofing material FC". In the present invention, such commercially available products can be used.

In the present invention, the lead fiber-containing resin sheet is wound and then this wound product is inserted into the metal pipe. An aluminum pipe is suitable as the metal pipe, but an iron pipe can also be used. Besides, a copper pipe, a brass pipe, and a stainless pipe can be used.

The thickness of the hard resin tube 1, the ring 2, the glass wool or resin foam 3, the lead fiber-containing resin sheet 4, and the metal pipe 5 is as follows. First, the thickness of the resin pipe 1 is made substantially equal to the thickness of the resin pipe that has been used so far as a drainage pipe. The thickness of the glass wool or resin foam 3 is within the range of 5 to 25 mm, and the thickness of the ring is also within this range. If this thickness is referred to the thickness of the resin pipe 1, the thickness of the ring 2 is not less than half and not more than 4 times the thickness of the resin pipe 1. The thickness of the lead fiber-containing resin sheet 4 is not less than ¼ and not more than one and a half times the thickness of the resin tube 1. The thickness of the metal pipe 5 is not more than half the thickness of the resin pipe 1.

In the present invention, after the lead fiber-containing resin sheet 4 is wound as described above, this wound product is inserted into the metal pipe 5 and pressure is applied to the outer surface of the metal pipe 5.
The inner diameter of the metal pipe 5 is reduced. A suitable method for applying pressure is drawing. This is a method of pulling a metal pipe through a hole in a die. At this time, if the diameter of the die hole is made appropriate, the inner diameter of the pipe 5 is reduced so that the pipe 5 comes into close contact with the resin sheet 4, and the resin sheet 4 comes into close contact with the ring 2, including the resin pipe 1. The whole becomes one. Thus, the composite pipe mainly integrated only by closely contacting each other is the sound deadening drainage pipe according to the present invention.

The sound deadening drainage pipe according to the present invention is shown in FIG.
Also, although it is shown as having four layers in FIG. 2, it may have four layers or more. For example, a layer such as a synthetic resin sheet or paper is further interposed between the resin pipe and the ring or between the ring 2 and the lead-containing resin sheet 4, and the whole is composed of a large number of layers of 5 layers or more. It may be one.

The position where the ring 2 is fitted is, as shown in FIGS. 1 and 2, a position on the outer surface of the resin pipe 1. In the ring 2, a lead-containing resin sheet 4 inside the metal pipe 5 is integrated at a certain distance from the resin pipe 1, and an air layer, a glass wool layer or a resin foam layer is interposed between them. This is because. In FIG. 1, a gap D between two adjacent rings 2 is such that, when the metal pipe 5 is subjected to a drawing process, the metal pipe 5 is suppressed from shrinking at the position where the ring 2 exists, while the ring 2 does not exist. Make it as large as possible within the range where it is possible to prevent depression at the position. The distance D is preferably about 10 to 100 times the outer diameter of the resin pipe 1.

In the sound deadening drainage pipe according to the present invention, the pipes can be easily connected as follows. That is, first, the metal pipe 5 is cut at a position slightly separated from the pipe end of the sound deadening drainage pipe. Then, between the metal pipe 5 and the lead fiber-containing resin sheet 4,
Since the inner diameter of the metal pipe is reduced, the pipe end portion of the metal pipe is easily attached to the resin sheet 4.
And the resin sheet 4 is exposed as a result. Also, the exposed resin sheet 4 can be easily removed similarly to the metal pipe 5, and by this removal, the ring 2, or the glass wool or the resin foam 3 can be removed.
Is exposed. Furthermore, since the ring 2, glass wool or resin foam can be easily removed, after all,
It is possible to easily expose only the hard synthetic resin pipe to the pipe end.

Thus, the hard synthetic resin pipe 1 is attached to the end of the composite pipe.
If only the resin pipes are exposed, then the composite pipes can be easily connected by the conventional resin pipe connection method. For example, the end of the resin tube is immersed in heating oil to be softened, an adhesive is applied to the outer surface of the other resin tube end, and this is inserted into the softened resin tube,
A so-called sleeve connection can be made. After that,
If necessary, glass wool or a resin foam may be wound around the exposed resin tube, a lead fiber-containing resin sheet may be further wound thereon, and the top may be covered with a metal plate or the like.

[0030]

In the sound deadening drainage pipe according to the present invention, the outermost layer is the metal pipe 5, the innermost layer is the hard resin pipe 1, and the lead fiber-containing resin sheet 4, the ring 2 and the air layer are provided between them. Since the glass wool layer or the resin foam layer 3 is interposed and the ring 2 is provided with a cut, the metal pipe 5 and the hard resin pipe 1 are integrated by reducing the inner diameter of the metal pipe 5. , The whole is firmly integrated. Therefore, this drainage pipe is not likely to be decomposed even if it is handled roughly, and therefore it can be used as a metal pipe lined with resin and safe against fire. In addition, a lead fiber-containing resin sheet is wound between the metal pipe 5 and the hard resin pipe 1 to form a lead layer, and an air layer, a glass wool layer or a resin foam layer is formed inside the lead layer. Since these layers are formed, these layers suppress the vibration of the pipe at the time of drainage and exert a sound deadening effect, and therefore, when the wastewater is passed through the pipe, the noise accompanying the flow of the wastewater is reduced, and No noise is generated. Therefore, it is useful as a sound deadening pipe. Further, in this sound deadening drainage pipe, the hard resin pipe 1 can be easily exposed by cutting the metal pipe and the inner layer portion following it as described above. Can be easily connected as well. The present invention provides such benefits.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a sound deadening drainage pipe according to the present invention. FIG. 2 is a partially cutaway perspective view of another sound deadening drainage pipe according to the present invention. FIG. 3 is a front view of the ring used in the present invention. FIG. 4 is a partially cutaway perspective view of the lead fiber-containing resin sheet used in the present invention. FIG. 5 is a perspective view showing a method for connecting a sound deadening drainage pipe according to the present invention. In the drawing, 1 is a hard resin tube, 2 is a ring, 3 is glass wool or resin foam, 4 is a lead fiber-containing resin sheet, and 5 is a resin sheet.
Is a metal pipe.

Claims (1)

[Claims] 1. A notched ring made of a hard material is fitted to some places on the outer surface of the hard resin pipe, and the other outer surface of the hard resin pipe is emptied or glass wool or synthetic resin is placed on the outer surface thereof. Winding the foam, further winding a lead fiber-containing resin sheet on it,
A sound deadening drainage pipe, characterized in that the rolled material is inserted into a metal pipe, pressure is applied to the outer surface of the metal pipe to reduce the inner diameter of the metal pipe, and the metal pipe is integrated with a hard resin pipe.