JPH116166A - Manhole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To freely install a manhole on an installing surface having a predetermined gradient by installing a catch basin connected to an inlet and outlet near an invert portion in a freely oscillating manner near a lower end peripheral edge portion of a rising pipe. SOLUTION: A catch basin 2 is formed by connecting together an inlet and an outlet in an invert portion. Then, on a catch basin, a coupling socket is fitted, and a rotary shaft 3 is provided which is made of a metal rotary shaft such as iron or steel, or a fiber-strengthened synthetic resin rotary shaft made of a glass fiber strengthened polyester resin. During construction work, near a lower end peripheral edge portion of a rising pipe 1, the catch basin 2 is attached in a freely oscillating manner by a rotary shaft 3 and a manhole is formed. Then, the manhole is lowered from the ground surface to an embedded hole 5 excavated to a sewer pipe laying floor, the bottom surface of the catch basin 2 is pressed to a laying floor and turned to an angle aligned with the gradient of the laying floor and arranged. In addition, a lid body 4 is placed on the upper end edge of the rising pipe 1. By doing this, the manhole can be installed freely on a laying surface having a certain slope.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole, and more particularly, to a manhole whose inclination can be freely adjusted on a slope.

[0002]

2. Description of the Related Art Sewage from various places is collected, guided to a final treatment plant according to the topography such as a flat area or a slope, purified and discharged. Manhole laying in a flat area can be completed easily by simply combining and joining manhole members such as commercially available synthetic resin drainage basins and riser pipes. If the laying surface itself is an inclined surface, etc., the manhole member is notched one by one according to its inclination, or a special joining member for joining another manhole member joined to the notch portion to the notch portion. In addition to making and adding, only the underground part requires cumbersome preparation processing and many construction steps, and the lid of the top of the rising member appearing on the surface of the ground, even if it is provided flush with the inclined ground surface Then, the same cumbersome preparation processing and construction steps are required.

[0003] The laying of manholes on the sloping land,
If the work is performed using concrete manhole members and accompanying concrete work, the work will be uniform in the first place, so such preparation processing is not necessary.However, the work itself requires various equipment and tools for concrete mixing. In addition, it involves dirty and hard work from powdered cement to fresh concrete paste, and it takes a long time to cure the obtained concrete product even after the above work is completed. Manholes are also considered to be inferior in seismic performance to the synthetic resin manholes, and the use of synthetic resin manholes has recently been increasing increasingly.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned facts, and has as its object the purpose of forming an inflow port and an outflow port irrespective of the degree of inclination of the laying surface. It is an object of the present invention to provide a manhole in which a drainage basin connected in an inverting section can be freely installed on a laying surface having a predetermined slope.

[0005]

According to the first aspect of the present invention,
The gist of the present invention is a manhole, which is characterized in that a drainage basin in which a water collection port and a discharge port are connected in an invert portion is swingably mounted near a lower end peripheral portion of the riser pipe.

[0006] The material of the drainage basin and riser used in the present invention is not particularly limited.
Synthetic resins such as hard vinyl chloride resin and low-expanded polypropylene are exemplified.

[0007] The rotating shaft for swingably mounting the drainage basin near the lower peripheral edge of the riser pipe is not particularly limited as long as it has necessary strength such as shear strength and bending strength. However, for example, a rotating shaft made of steel, stainless steel, or another metal, a rotating shaft made of a fiber-reinforced synthetic resin such as a glass fiber reinforced polyester resin or a carbon fiber reinforced polyester resin, or polyphenylene sulfate (P
PS), polyphenylene ether (PPE), polyarylate, polyetheretherketone (PEEK), polyethersulfone (PES), and other engineering plastic rotating shafts.

The structure of the rotating shaft is not particularly limited. For example, an opposing position near the lower end peripheral edge of the riser pipe and a corresponding opposing position near the upper end peripheral edge of the drainage basin corresponding thereto. And a bearing for rotatably fixing the shaft may be provided at a position between the riser and the drainage basin, and a lower end periphery of the riser may be provided. The shaft and a bearing for rotatably fixing the shaft may be provided at an opposing position in the vicinity of the portion and an opposing position in the vicinity of the upper peripheral edge of the drainage basin corresponding thereto.

The opposing position near the upper edge of the drainage basin provided with the rotation shaft is not particularly limited as long as the drainage basin in which the inflow port and the outflow port are connected at the invert portion. On the drainage basin where the inflow port and the outflow port are connected at the invert portion, an additional socket is further fitted,
The rotary shaft may be provided on the additional socket. Further, the upper and lower portions including the rotary shaft may be further formed of styrene-butadiene rubber (SBR) on the drainage basin. An additional ring for swinging, which is rotatably connected by a watertight joint mechanism with a built-in packing made of an elastic material such as rubber or chloroprene rubber (CR), may be fitted.

[0010] It is preferable that the sliding surface of the sliding portion in which the riser pipe and the drainage basin are swingably connected with each other by a rotation axis is sealed water-tightly between both side walls by a packing.

The rotation angle of the drainage basin that is swingably attached to the riser is not particularly limited, but if it is too large, it forms a horizontal plane of the lid exposed on the ground surface of the manhole. Since the angle becomes large, the angle is usually set to be about 15 degrees and can be adjusted up to a gradient of 12 to 13/100.

As described above, the manhole of the present invention is provided with a drainage basin in which an inflow port and an outflow port are connected to each other at an invert portion in the vicinity of a lower peripheral edge of a riser so as to be swingable. The assembled manhole is lowered from the ground surface to the buried hole excavated from the ground surface to the sewer pipe laying floor, and when the bottom of the drainage basin is pressed against the sewer pipe laying floor, the slope provided on the sewer pipe laying floor is reduced. It is freely rotatable to the matched angle and arranged so as to be connectable to the upstream and downstream sewage pipes. In the actual construction, after the upstream and downstream sewer pipes were connected to the drainage basin, the riser was lowered along the buried hole in the drainage basin, and turned from the vertical line to the perpendicular to the ground surface. In some cases, it can be freely rotated to the position and joined near the lower edge. In any case, regardless of the degree of inclination of the ground surface at the laying position, the manhole member can be assembled in exactly the same as in the flat ground, and the manhole cover exposed on the ground surface is located at the laying position. It can be installed flush with the ground surface.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
Although described with reference to the drawings, the present invention is not limited to these examples.

(Embodiment) FIG. 1 is a perspective view showing an example of a manhole according to the present invention, wherein 1 is a riser having a nominal diameter of 300 mm, and 2 is a flow pipe to which a sewer pipe having a nominal diameter of 100 mm is connected. An inlet 21 and an outlet 22 are a drainage basin connected at an invert portion, and the riser 1 and the drainage basin 2 are arranged so that the lower end periphery of the riser 1 is located outside the upper end periphery of the corresponding drainage basin 2. As shown in FIG. 2, a portion where the lower peripheral edge of the riser pipe 1 overlaps the upper peripheral edge of the drainage tub 2 is shown in FIG. The packings 12 and 23 made of SBR are respectively slid so as to slide on the outer peripheral wall at the upper end and the upper peripheral edge of the drainage basin 2 to slide on the inner wall at the lower peripheral edge of the riser 1 to maintain watertightness in the swinging direction. Rise pipe 1 attached and in a direction parallel to the swing direction The inner surface and outer surface of the catch basin 2, so as to maintain the water-tightness of both the sliding surface of each SBR made packing 13 and 24 are inserted. Reference numeral 4 denotes a cover, which is covered by the upper edge of the riser 1 and covers, for example, a burial hole 5 formed in a road surface for burying the manhole, flush with other road surfaces.

The riser pipe 1 and the drainage basin 2 are formed at a portion where the lower peripheral edge of the riser pipe 1 and the upper peripheral edge of the drainage basin 2 overlap each other by passing through opposing wall surfaces passing through both pipe axes. It is swingably and water-tightly joined by a driving shaft 3 via a bearing.

FIG. 3 shows a buried hole 5 having a length of 1.3 m which reaches a sewage pipe laying position perpendicular to the road surface so as to expose the lid on a road surface having a slope of about 15 degrees. 5, the drain basin assembled as described above is lowered, and when the drain basin 2 presses the sewer pipe laying position floor surface 6, it is freely rotated and provided on the sewer pipe laying position floor surface 6. 2/10
It was fixed at a gradient of 0 and connected to the upstream and downstream drains.

[0017]

Since the manhole of the present invention is constructed as described above, it is possible to assemble the manhole member by the same assembling method as on a flat ground, regardless of the inclination of the ground surface at the laying position. In addition, the manhole cover exposed on the ground surface can be installed flush with the ground surface at the laying position.

[0018]

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a manhole of the present invention.

FIG. 2 is a partially cutaway cross-sectional view showing a portion where a lower peripheral edge of a riser pipe 1 of a manhole and an upper peripheral edge of a drainage basin 2 of the present invention are overlapped.

FIG. 3 is a cross-sectional view showing a state where the manhole shown in FIG. 1 is constructed on a slope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rise pipe 1 2 Drainage basin 21 Inflow 22 Outflow 3 Rotation axis 12, 13, 23, 24 Packing 4 Lid 5 Buried hole 6 Sewer pipe laying position Floor surface

Claims (1)

[Claims] 1. A manhole, wherein a drainage basin in which an inflow port and an outflow port are connected at an invert portion is swingably attached to a vicinity of a lower peripheral edge of a riser.