JP2002038578A - House inlet invert - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a house inlet invert capable of facilitating the fine adjustment for the finishing in the case of installation work or installation, eliminating the labor for the finishing of an invert gutter to quickly and accurately form a channel and obtaining the smooth finish surface of the invert gutter as well as the excellence in durability. SOLUTION: The house inlet invert having an FRP made channel material and a concrete layer laminated on the rear thereof is so constituted that the end face of the FRP made channel material covers the side end face of the concrete layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an invert for a sewage basin applied to a sewage basin or a rainwater basin.

[0002]

2. Description of the Related Art Heretofore, the following are known as inverts for sewage basins used in sewage basins and rainwater basins. (2) As described in JP-A-59-18831, the invert is pre-grooved and assembled as a finished product. ■ In addition, a cylindrical concrete measure body is installed at the site, and concrete is cast at the bottom to form a predetermined invert groove. ■ Japanese Utility Model Laid-Open No. 57-142079 and Japanese Utility Model Laid-Open No. 59-10
No. 390, a plastic invert is applied to the surface of an invert groove to improve the finish of the invert.

On the other hand, plastic sewage basins made of injection-molded products and the like are also used as sewage basins and rainwater basins, but concrete sewage basins are superior in terms of ease of manufacturing large sized ones and durability. Therefore, there is no situation where it can be immediately replaced with a plastic wastewater basin.

[0004]

Therefore, when constructing the above-mentioned invert for sewage basin, it is necessary to assemble it as a finished product in which the invert has been grooved in advance, as described in JP-A-59-18831. However, there is a drawback that the finished product with the invert grooved is very heavy and difficult to handle, and that fine adjustment of the water channel performed at the time of installation is troublesome. ■ In the case where a cylindrical concrete basin body is installed on site and concrete is cast at the bottom to form a predetermined invert groove, it is difficult to form a water channel accurately.
There has been a problem that it takes too much time to finish the invert groove. Therefore, as described in Japanese Utility Model Application Laid-Open No. 57-142079 and Japanese Utility Model Application Laid-Open No. 59-10390, in the case where a plastic invert is applied to the surface of the invert groove in order to improve the finish of the invert, the waterway itself is not used in advance. Has the advantage of being able to form
There are drawbacks that it is difficult to make fine adjustments when installing the invert, and that an error occurs in the curing process after placing the concrete. ● And as described in Japanese Patent Publication No. 6-96875,
A concrete invert on which a worker can ride is prepared and applied to the surface of the invert groove, which has the advantage that the waterway itself can be accurately formed in advance, but the finish of the invert groove, which is the concrete forming surface, is completed. There was a drawback that the surface was unsatisfactory, the waterway was easily stained, and it was difficult to clean. ● Furthermore, the above-mentioned concrete inverts are liable to be chipped or cracked at the end face during transportation or construction, which takes time and troubles in construction, and poor construction of the chipped or cracked parts causes problems such as water leakage. This has been a cause of the problem, and its solution has been desired. Such a drawback similarly occurred in Utility Model Registration No. 2517524 proposed by the present inventors.

Therefore, in order to solve the above-mentioned problems, the invert for a sewage basin according to the present invention can easily perform fine adjustment for installation work and finishing at the time of installation, and does not require labor for finishing the invert groove. It was invented for the purpose of providing an invert for a sewage basin capable of quickly and accurately forming a water channel, obtaining a very smooth finished surface of an invert groove, and having excellent durability. Things.

[0006]

In other words, the invert for sewage basins of the present invention is an invert for sewage basins having an FRP channel material and a concrete layer laminated on the back surface thereof. It is characterized by being formed so as to cover the side end surface of the concrete layer.

[0007] The invert for sewage basins of the present invention is a FR
In a sewage basin invert having a P channel material and a concrete layer laminated on its back surface, the end surface of the FRP channel material covers the side end surface of the concrete layer, and furthermore, a step is provided at the end thereof. It is characterized in that the lifting of the FRP channel material during construction is prevented.

[0008] The sewage basin invert of the present invention is characterized in that the exposed portion of the outer surface of the concrete layer is covered with a protective cover.

[0009] The sewage basin invert of the present invention is also characterized in that the concrete layer is made of lightweight concrete.

[0010] The invert for a sewage basin of the present invention is characterized in that the protective cover is selected from FRP, a single or composite sheet of plastic, woven or non-woven fabric, or the like.

In forming the invert for a sewage basin of the present invention, an invert communicating with the inlet and the outlet is installed in a sewage basin body having an inlet and an outlet in advance, and the outside of the invert is concreted. It should just be cast.

That is, since the invert is formed of a waterway material made of lightweight concrete having a predetermined thickness provided with a groove communicating with the inflow port and the outflow port, the invert is fitted into the invert for the sewage basin, and appropriate means is provided. It is only necessary to cast concrete around the invert while adjusting its inclination and height.

[0013] By doing so, the installation work can be performed manually without using a large-sized machine, and the lightweight concrete is used. When a concrete base is cast and the lightweight concrete waterway material is set on the base, the waterway material hardly sinks, and the position adjustment at the time of installation can be performed easily and quickly.

Further, the labor of finishing the invert groove is not required, so that the water channel can be formed quickly and accurately, and the end face thereof is not chipped or cracked during transportation or construction. In addition, the construction can be performed promptly, and troubles such as water leakage due to poor construction of a chipped or cracked portion can be prevented.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a wastewater basin invert according to the present invention will be described in detail with reference to the drawings.

1 to 3, reference numeral 1 denotes an invert. The invert 1 has a plastic waterway material 2 made of FRP or the like provided with a groove 3 communicating with an inflow port and an outflow port of sewage, and a predetermined thickness provided along the waterway material 2 at a lower portion thereof. It is formed integrally with the lightweight concrete layer 4. In the figure, the invert 1 is formed so as to be an elbow-shaped water channel, but it can be formed in a shape required for a water channel such as a straight tube, a T-shape, or a Y-shape.

The plastic channel member 2 made of FRP or the like has an upwardly bent portion 5 on its upper end surface and a downwardly bent portion 6 on its side edge.
The bent portions 5 and the folded portions 6 not only reinforce the waterway material 2 and adhere to the lightweight concrete layer 4 but also prevent chipping or cracking of the end face of the lightweight concrete layer 4.

Lightweight concrete used for the lightweight concrete layer 4 provided along the waterway material 2 includes natural lightweight aggregates such as volcanic gravel and pumice, expanded shale, expanded clay, and the like.
Concrete using artificially processed artificial lightweight aggregate such as fired fly ash, foamed concrete foamed with a foaming agent, or the like can be used.

At the time of manufacturing the above-mentioned invert 1, the waterway material 2 or the lightweight concrete layer 4 is prepared in advance with a molding die, and for example, the waterway material 2 is put into a mold and concrete is poured. Plastic made of FRP or the like may be stretched. At this time, if the sand 7 or the like having a particle size of about 1 to 5 mm is adhered and roughened before hardening the plastic made of FRP or the like, the adhesion between the waterway material 2 and the lightweight concrete layer 4 is very good. It becomes something.
Of course, the method of surface roughening is not limited to this. In addition, both ends of the invert 1 have predetermined arcs according to the shape of the cylindrical sewage basin body to be fitted thereafter.

FIG. 4 shows a state in which the obtained invert 1 is set in a tubular sewage basin main body 11. At this time, although the invert 1 itself has the lightweight concrete layer 4, the lightweight concrete layer 4 is formed only below the waterway material 2 along the waterway material 2, so that the weight can be carried sufficiently by hand.

On the other hand, the sewage basin main body 11 is
And an outlet 13. Inlet 12 of this sewage
The outlet 13 can be formed as a knockout hole in which the portion is made thinner, or as an opening in advance.

Then, a mortar or concrete base 14 is previously placed at a predetermined height in the cylindrical sewage basin main body 11, and the outside of the invert 1 set thereon is further mortar or concrete. It is cast. At that time, the installation work can be performed manually without using a large machine. Moreover, since the lightweight concrete layer 4 is used, a mortar or concrete base 14 is previously set at a predetermined height in accordance with the inlet and outlet of the wastewater, and the invert 1 of the present invention is set on the base. In addition, there is almost no sinking of the invert 1, and the position adjustment at the time of installation can be performed easily and quickly.

The base 14 and the mortar or concrete casting portions 15 on both sides of the invert 1 are completely integrated with the lightweight concrete layer 4 after curing. Invert 1 Mortar or concrete placing part 1 on both sides
5 is an invert 1 to prevent sewage from staying on top of it.
It is desirable to incline to the waterway side.

The folded portion 6 formed on the side edge of the plastic waterway material 2 made of FRP or the like is provided with mortar or concrete casting portions 1 on both sides of the invert 1.
5 is buried in the concrete when it is formed, and peeling from the lightweight concrete layer 4 during use is prevented.

FIG. 5 shows another embodiment of the sewage basin invert of the present invention, wherein a bent portion 5 formed on the upper end surface of the plastic waterway material 2 made of FRP or the like is used.
Is formed so as to extend from the water channel portion so as to have an R of a predetermined curvature, and care is taken so that sewage flowing in the water channel does not stay in the bent portion 5. Of course, also in this example, the folded portion 6 is buried in the concrete when the mortar or the concrete casting portion 15 on both sides of the invert 1 is formed, and the peeling from the lightweight concrete layer 4 during use is prevented.

FIG. 6 shows still another embodiment of the sewage basin invert of the present invention, which is not covered with the bent portion 5 and the folded portion 6 of the plastic waterway material 2 made of FRP or the like. The outer surface of the lightweight concrete layer 4 is covered with a protective cover 21. This protective cover 21 is selected from FRP, a single or composite sheet of plastic, woven fabric or nonwoven fabric, and is laminated on the outer surface of the lightweight concrete layer 4. The laminating method can be performed by integrating the lightweight concrete layer 4 at the time of casting, or by attaching the lightweight concrete layer 4 using an adhesive or a double-sided adhesive tape. By doing so, troubles such as chipping or cracking due to impact or the like are less likely to occur, and even if the above troubles occur, there is no problem in construction.

FIG. 7 shows still another embodiment of the invert for sewage basin of the present invention. The bent portion 5 and the folded portion 6 of the plastic waterway material 2 made of FRP or the like are provided at the ends. , A step 8 is provided. This step 8
Is for preventing floating of the FRP channel material during construction.

[0028]

When forming the invert for the sewage basin of the present invention, an invert communicating with the inlet and the outlet is installed in a sewage basin body having an inlet and an outlet in advance, and the outside of the invert is provided. Can be cast with concrete.

That is, a plastic waterway made of FRP or the like provided with a groove communicating with the inflow port and the outflow port as the invert, and a concrete layer of a predetermined thickness provided along the waterway material at a lower portion thereof Therefore, the invert may be inserted into the sewage basin invert, and the concrete may be cast around the invert while adjusting its inclination and height by appropriate means.

By doing so, the installation work can be performed manually without using a large-sized machine, and since lightweight concrete is used, the mortar or mortar can be adjusted to a predetermined height in advance according to the inlet and outlet of the wastewater. When a concrete base is cast and the lightweight concrete waterway material is set on the base, the waterway material hardly sinks, and the position adjustment at the time of installation can be performed easily and quickly.

Further, the labor of finishing the invert groove is not required, so that it is possible to form the water channel quickly and accurately, without causing chipping or cracking of the end face during transportation or construction. In addition, the construction can be performed promptly, and troubles such as water leakage due to poor construction of a chipped or cracked portion can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of an invert for a sewage tank according to the present invention.

FIG. 2 is a perspective view thereof.

FIG. 3 is a cross-sectional view thereof.

FIG. 4 is a cross-sectional view of a completed state of the invert for a sewage basin.

FIG. 5 is a cross-sectional view showing another embodiment of the wastewater basin invert of the present invention.

FIG. 6 is a sectional view showing still another embodiment of the invert for a sewage basin of the present invention.

FIG. 7 is a sectional view showing still another embodiment of the invert for a sewage basin of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Invert 2 Waterway material 3 Groove 4 Concrete layer 5 Bending part 6 Folding part 7 Sand 8 Step 11 Sewage basin main body 12 Inlet 13 Outlet 14 Base 15 Concrete casting part 21 Protective cover

Claims (5)

[Claims] 1. An invert for a sewage basin having an FRP channel material and a concrete layer laminated on the back surface thereof, wherein an end face of the FRP channel material is formed so as to cover a side end face of the concrete layer. Characteristic invert for sewage basin. 2. An invert for a sewage basin having an FRP channel material and a concrete layer laminated on the back surface thereof, wherein an end surface of the FRP channel material covers a side end surface of the concrete layer and further has an end portion thereof. An invert for a sewage basin, characterized in that a step is provided on the surface to prevent the FRP channel material from being lifted during construction. 3. The invert for a sewage basin according to claim 1, wherein the exposed portion of the outer surface of the concrete layer is covered with a protective cover. 4. The invert according to claim 1, wherein the concrete layer is made of lightweight concrete. 5. The invert for a sewage tank according to claim 2, wherein the protective cover is selected from FRP, a single or composite sheet of plastic, a woven fabric or a nonwoven fabric, and the like.