JPH09235775A - Drainage pit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage pit in which it is easily temporarily installed and positioned in the piping work without use of a level vial. SOLUTION: A drainage pit is provided with a rubber ring type receive opening 11 in which the lower end of a cleaning inlet pipe is inserted, at the upper part and also provided with an linear invert at the lower part. A rubber ring type receive opening 13 is provided at the inflow side end of the invert and an insert opening 14 is provided at the outflow side end so as to be connected to each other. The first marking projections 12b, 12c to find out the axial center of the receive opening 11 are provided at four positions in the peripheral direction of the external peripheral face of a circular buldge 12 formed by the pipe swollen circularly at the opening end of the receive opening 11. And the second marking dent with a semicircular section corresponding to the axial center of the receive opening is provided at the inside of the bottom of invert.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage basin which is used by being disposed in the middle of a drainage pipeline for rainwater, sewage, etc., and which can be easily positioned during piping construction of the pipeline.

[0002]

2. Description of the Related Art Conventionally, as a drainage basin used in the middle of a drainage pipe, for example, in Japanese Utility Model Publication No. 7-48787, a cleaning port is provided at an upper portion and an invert portion is provided at a lower portion. A pipe receiving port to which a drainage pipe is connected is formed at the end of the pipe receiving port, and a projection is provided on the top of the outer surface of the pipe receiving port. The drainage basin formed in 1. is described.

Then, the pipe receiving ports formed at the ends of the invert portions are arranged so as to face each other, and the drain pipes are inserted into these facing pipe receiving ports, and the projections provided on the outer surface apex of the facing pipe receiving ports. By fixing the water thread in the cut groove and setting it as the reference line, the warp and twist of the drainage pipe can be easily detected by the distance from this reference line to the outer peripheral surface of the drainage pipe, and the drainage pipe along the reference line. By arranging the outer peripheral surface of the drain pipe, it is possible to easily prevent the drain pipe from warping or twisting in the vertical direction, and easily obtain the drain slope of the drain pipe.

Further, in Japanese Utility Model Laid-Open No. 5-90088, a main body of a small-diameter manhole, which is a pipe joint-shaped invert having at least one sub-pipe axis intersecting with the main-pipe axis, is provided with a cleaning port receptacle (or With the opening)
By providing a positioning mark at the intersection of the extension lines of the main pipe axis and the auxiliary pipe axis and at a position visible from above, the position of the small-diameter manhole in plan view becomes accurate, and the dimensional accuracy is high. The positioning is suitable for PVC manholes produced in factories, and the small-diameter manhole made of PVC is described, which has a much higher construction accuracy than the manhole made of concrete.

[0005]

However, in the case of the drainage basin disclosed in Japanese Utility Model Publication No. 7-48787, the gap between the projections formed at the tops of the outer surfaces of both pipe receptacles connected to the both ends of the drainage main pipe. Water threads must be stretched and fixed, but in narrow areas the road width is narrow and the excavation width cannot be wide, so the construction width is narrower than in the past,
There is a problem that it is difficult to stretch the water thread in the open-cut groove.

Further, in the small-diameter manhole made of vinyl chloride in Japanese Utility Model Laid-Open No. 5-90088, even if the main pipe axis direction of the main pipe receiving port and the main pipe inlet is positioned in a desired direction, the manhole is Since it has a cleaning port receptacle or a spout and has a predetermined height, it tends to tilt during construction, and there is a problem that it is difficult to position to prevent this tilt.

The present invention is intended to solve the above-mentioned conventional problems, and an object of the present invention is to easily perform temporary positioning of a drainage basin without using a level during piping installation. It is to provide a drainage basin that can

[0008]

A drainage basin of the present invention as set forth in claim 1 is provided with a cylindrical connecting portion with a cleaning port pipe at an upper portion and an invert portion at a lower portion, and both end portions of the invert portion are provided. In a drainage basin in which a cylindrical inflow-side connecting portion and an outflow-side connecting portion are connected to each other, in order to find an axial center of the connecting portion at four circumferential positions of an upper pipe wall of the cylindrical connecting portion. No. 1 is provided, and a second indicia corresponding to the axis of the cylindrical connecting portion is provided on the inner surface of the bottom of the invert portion.

The shape of the cylindrical connection portion with the cleaning port tube in the present invention may be either a receiving port or a spigot. There are two methods for the receiving port, the TS bonding method and the rubber ring method with a rubber ring for sealing. When applying the drainage basin as a public basin or manhole to be used under a public road, The rubber ring method is preferable. That is, the pipe wall is bulged outwardly on the outer periphery of the connecting portion to form an annular bulging portion, and a sealing rubber ring made of synthetic rubber is mounted in the annular groove inside the annular bulging portion. Is good.

In the present invention, in order to find the axis of the cylindrical connecting portion, first markings are provided at four locations in the circumferential direction of the upper pipe wall thereof, and the first markings corresponding to the axis of the connecting portion are provided. The second marking is provided on the inner surface of the bottom of the invert portion, and it is desirable that the first marking is a convex portion and the second marking is a concave portion. The first marking may be a concave portion and the second marking may be a convex portion, or the first and second markings may be unified as either a convex portion or a concave portion. In the case of a recess, the depth of the recess is 0.2 to 1.0 mm, preferably 0.3 to 0.7 mm. Further, in the case of a convex portion, the protrusion height thereof is 0.2 to 3.0 mm, preferably 0.3 to 1.5 mm. The shape of the convex portion or the concave portion is not particularly limited.

Further, a paint (preferably a fluorescent paint) may be applied to both of the above signs to form a two-dimensional mark. The type of this mark may be any of ○, ×, +, □, Δ, ◎, ☆ and the like. At that time, the first mark may be provided on the upper end surface instead of on the outer peripheral surface of the cylindrical connection portion.

When the cylindrical connecting portion is a rubber ring type expanded diameter receiving port, two imaginary lines extending along the receiving port axial center are extended in a plane orthogonal to the receiving port axial center. It is preferable to provide first markings composed of convex portions at four locations on the outer peripheral surface of the annular bulging portion corresponding to the lines. It is possible to form this convex portion at the same time when forming the drainage basin,
In this case, since the structure of the inner mold for molding becomes complicated, it is preferable to perform it at the same time when the diameter-enlarging port of the rubber ring system is formed by post-processing after molding the drainage basin.

(Operation) In the drainage basin of the present invention as set forth in claim 1, first markings for finding the axis of the connecting portion are provided at four locations in the circumferential direction of the upper pipe wall of the cylindrical connecting portion. Moreover, since the second marking corresponding to the axis of the cylindrical connecting portion is provided on the inner surface of the bottom of the invert portion, 4
Using the first marking provided at the location, two water threads that pass through the axial center of the cylindrical connection portion are crossed on the upper end surface of the cylindrical connection portion. Adjust using the plumb bob at the installation position so that the second marking provided on the inner surface of the bottom of the invert section and the section match.
By aligning with the vertical direction (gravitational direction), the axis of the cylindrical connection portion of the drainage basin can be easily taken out without using a level.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of a drainage basin of the present invention. FIG. 1 is a front view, FIG. 2 is a right side view, and FIG. 3 is a plan view. FIG. 4 is an exploded explanatory view showing the invert member, and FIG. 5 is an enlarged vertical sectional view showing the invert member.

In the figure, G is a straight drainage basin made of hard vinyl chloride resin, and has a substantially inverted T-shaped basin body 1 and an invert member 2 fitted and adhered to the lower opening of the basin body 1. It consists of The invert member 2 forms the inversion portion of the drainage basin G,
A predetermined drain gradient equal to the pipeline gradient is set on the inner surface portion.

At the upper part of the main body 1 of the cylinder, there is provided a cylindrical cleaning port receptacle 11 for cleaning, and at the open end of the cleaning port receptacle 11, the tube wall is bulged in an annular shape. The projecting portion 12 is formed. An annular groove 12a inside the annular bulging portion 12
A rubber ring for sealing made of synthetic rubber (not shown) is mounted on the. A lower end of a cylindrical cleaning port tube (not shown) is inserted into and connected to the cleaning port receptacle 11, and an inner lid is fitted to an upper end opening of the cleaning port tube.

At both ends of the lower portion of the main body 1 of the cylinder, there are provided a cylindrical receiving opening 13 and a cylindrical opening 14.
The receiving port 13 is on the inflow side, and the inlet port 14 is on the outflow side. An annular bulging portion 15 is formed by bulging the pipe wall in an annular shape at the opening end of the receiving port 13. A rubber ring for sealing made of synthetic rubber (not shown) is attached to the annular groove 15a inside the annular bulging portion 15. Then, the outlet of the sewer main described later is inserted into the receiving port 13, while the enlarged receiving port of the sewer main is externally inserted and connected to the outlet 14.

At the four locations on the outer peripheral surface of the annular bulging portion 12 of the cleaning port receptacle 11, narrow protrusions 12b, which are first markings, are provided.
12b, 12c, 12c are integrally provided in the vertical direction. That is, as shown in FIG. 3, the cleaning port receptacle 1
In a plane orthogonal to the axial center of 1, an annular bulge that passes through the axial center of the cleaning port receptacle 11 and is located corresponding to the extension of two imaginary lines L1 and L2 intersecting each other at a right angle. Two protrusions 12b, 12b at four locations on the outer peripheral surface of the portion 12
And two protrusions 12c, 12c are provided so as to face each other.

As is apparent from FIG. 3, in the plan view, the two opposing 12b are located on the axis of the receiving port 13 and the spigot 14 of the container body 1. On the other hand, the two opposing 12c intersect at right angles with the axis of the receiving port 13 and the outlet 14 of the container body 1.

The invert member 2 is, as shown in FIG.
It is composed of an invert body 21 and a bottom plate 25 that closes a lower opening of the invert body 21.

The invert body 21 is, as shown in FIG.
It has a hollow horizontal cross section and a circular opening at the bottom, and an invert surface 23 thereof has a concave semicircular groove-like invert portion 23. A second mark, that is, a recess 23a having a semicircular cross section is formed in the center of the inner surface of the invert portion 23. This depression 23
a is provided at a position corresponding to the axis of the cleaning port receptacle 11.

A contact rib 23b is integrally formed on the back surface of the lowest portion of the invert portion 23. An annular collar portion 24 is provided on the outer peripheral edge of the lower end of the invert body 21,
A notch 24a is formed along the entire circumference at the inner corner of the collar 24.
The stepped portion 24b is formed by forming the. In addition, the outer peripheral side surface of the collar portion 24 is chamfered so that the inclined surface 2
4c.

The bottom plate 25 has a circular shape, and an annular rib 25a is integrally formed on the peripheral portion of the upper surface thereof. The annular rib 25a is provided on the collar portion 24 of the invert body 21.
It is to be ultrasonically fused to the step portion 24b.

The annular rib 2 of the bottom plate 25 is attached to the step portion 24b.
The invert member 2 is formed by bringing 5a into contact with each other and heat-sealing the contact portion. Inverted body 2
1 and the bottom plate 25 are both formed of a hard vinyl chloride resin containing an impact resistance modifier such as MBS.

Then, the invert member 2 in which the adhesive is applied to the outer surface of the invert member 21 of the invert member 2 is inserted into the inside of the lower portion of the main body 1 of the invert member 2 and fitted and bonded to form the drainage basin G.

Next, the piping construction using the drainage basin G of the above embodiment will be described. As shown in FIG. 6, the drainage basin G is temporarily placed on a foundation that has been sufficiently tamped and flattened according to a predetermined pipeline gradient, and the length of the sewage main pipeline is adjusted to adjust the adjustment pipe 4 Is connected to the main sewer 3. Then, a joint is dug around the receiving part of the main sewer 3. Receptacle 4 for adjusting tube 4
A lubricant is applied to the outer surface of the spout 14 of the drainage basin G and the rubber ring for sealing mounted inside 1, and they are connected using an inserter.

Next, as shown in FIG. 7, the drainage basin G is vertically centered and the horizontality is adjusted. First, by using the protrusions 12b, 12b, 12c, 12c provided at four locations on the outer peripheral surface of the annular bulging portion 12 of the cleaning port receptacle 11, the two water threads 5 are crossed at right angles to each other. Fix by tension. The intersecting portion 5a of the water threads 5 and 5 is located on the axis of the cleaning port receptacle 11. Next, the plumb bob 6 is hung from the opening of the cleaning port receptacle 11 of the drainage basin G into the invert portion 23. The upper end of this plumb bob 6 is taut 7
It is fixed to the center nail 71.

Then, the drainage basin G is adjusted so that the intersection 5a of the water thread and the center of the recess 23a provided on the inner surface of the bottom of the invert portion 23 are aligned with each other. If the intersecting portion 5a of the water thread and the center of the recess 23a are aligned in the vertical direction (gravitational direction), the drainage basin G can be centered and the levelness can be adjusted. In this state, the drainage basin G is firmly positioned and fixed. In addition, 8 is a ruler for height adjustment, 9 is a sheet pile.

In the same manner, the connection work between the inlet 13 on the inflow side of the drainage basin G and the sewer main 3 on the upstream side is sequentially performed to complete the pipe construction.

FIG. 8 is a plan view showing a second embodiment of the drainage basin of the present invention. It is the same straight drainage basin G as in the first embodiment. In this case, the cleaning port receiving port 11a is a TS bonding type receiving port, and the connection parts at both ends of the invert portion 23 are also TS bonding type receiving ports 13a and 14a. Then, narrow protrusions 12b, 12b, 12c, 12c, which are the first signs similar to those of the first embodiment, are integrally provided in the vertical direction at four locations on the outer peripheral surface of the cleaning port receptacle 11a. ing. Further, the invert portion 23 is formed integrally with the container main body 1, and a cross-shaped projection 23b, which is a second sign, is formed at the center of the inner surface of the invert portion 23. The arrow A indicates the flow direction of the waste water.

FIG. 9 is a plan view showing a third embodiment of the drainage basin of the present invention. The drainage basin G has a 90-degree bend, and the cleaning port receptacle 11b is a TS adhesive receptacle, and the connection portions at both ends of the invert portion are also TS adhesive receptacle 13.
b and 14b. Then, the cleaning port receptacle 11b
At four locations on the outer peripheral surface of the above, narrow protrusions 12b, 12b, 12c, 12c, which are the first markings similar to those of the first embodiment, are provided.
Are integrally provided in the vertical direction. Further, the invert portion 23 is formed integrally with the sill body 1, and a cross-shaped mark 23, which is a second sign, is provided at the center of the inner surface of the invert portion 23.
c is formed of fluorescent paint. The arrow A indicates the flow direction of the waste water.

FIG. 10 is a plan view showing a fourth embodiment of the drainage basin of the present invention. It is a 45 degree Y confluence type drainage basin G, and the cleaning port receptacle 11c is a TS adhesive receptacle.
The connection parts at both ends of the invert part are the TS-type sockets 13
c and 14c. Further, the branch connection portion is also a TS adhesion type receiving port 130c. Then, linear marks 12b, 12b, 12c, and 12c, which are first markings, are formed at four positions on the opening end surface of the cleaning port receiving port 11c with the oil-based ink. Further, the invert portion 23 is formed integrally with the basin body 1, and a second mark 23d, which is a mark O, is formed by an oil-based ink at the center of the inner surface of the invert portion 23. The arrow A indicates the flow direction of the waste water.

[0033]

According to the drainage basin of the present invention as set forth in claim 1, first markings for finding the axis of the connecting portion are provided at four locations in the circumferential direction of the upper pipe wall of the cylindrical connecting portion. Also, since the second marking corresponding to the axis of the cylindrical connecting portion is provided on the inner surface of the bottom of the invert portion, the cylindrical connecting portion can be utilized by using the first markings provided at four positions. Two water threads that pass through the axis of the cylindrical connecting portion are crossed and stretched on the upper end surface of the, and the intersection of the water threads and the second marking provided on the inner surface of the bottom of the invert portion match. To do
By adjusting using plumb bob at the installation position and aligning with the vertical direction (gravitational direction), it is possible to easily center the axis of the cylindrical connection part of the drainage basin without using a level. it can.

In the drainage basin of the present invention as defined in claims 2 and 3, an annular bulging portion, on which a rubber ring for sealing is mounted, is formed by bulging on the outer periphery of the cylindrical connecting portion, and If the convex portions which are the first markings are provided at four locations on the outer peripheral surface, the convex portions may be provided at the same time when the annular bulging portion is formed in the cylindrical connecting portion in the post-processing. it can.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of a drainage basin of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a plan view of FIG. 1;

FIG. 4 is an exploded explanatory view showing an invert member.

FIG. 5 is an enlarged vertical sectional view showing an invert member.

FIG. 6 is an explanatory view showing a construction state of the drainage basin shown in FIG.

FIG. 7 is an explanatory view showing a construction state of the drainage basin shown in FIG.

FIG. 8 is a plan view showing a second embodiment of the drainage basin of the present invention.

FIG. 9 is a plan view showing a third embodiment of the drainage basin of the present invention.

FIG. 10 is a plan view showing a fourth embodiment of the drainage basin of the present invention.

[Explanation of symbols]

 G Drainage basin 1 Mouth body 11 Cleaning port receptacle 12, 15 Annular bulge 12b Protrusion (first marking) 12c Protrusion (first marking) 13 Inlet side inlet 14 Outlet side inlet 13 Large bend Part 2 Invert member 21 Invert body 22 Invert surface 23 Invert part 23a Indentation (second marking) 23b Protrusion (second marking) 23c, 23d Mark (second marking) 24 Collar portion 24a Cutout portion 24b Step portion 24c Inclined Surface 25 bottom plate

Claims (3)

[Claims] 1. A cylindrical connection portion with a cleaning port pipe is provided at an upper portion, and an invert portion is provided at a lower portion, and a cylindrical inflow side connection portion and an outflow side connection portion are connected to both ends of the inversion portion. In the drainage basin provided as above, first markings for finding the axial center of the connecting portion are provided at four locations in the circumferential direction of the upper pipe wall of the cylindrical connecting portion, and the bottom portion of the invert portion is provided. A drainage basin, characterized in that the inner surface is provided with a second marking corresponding to the axis of the cylindrical connecting portion. 2. The drainage basin according to claim 1, wherein the first marking is a convex portion and the second marking is a concave portion. 3. A ring-shaped bulging portion to which a rubber ring for sealing is mounted is formed on the outer circumference of the cylindrical connecting portion by bulging, and a first sign is provided on the outer peripheral surface of the ring-shaped bulging portion. The drainage basin according to Item 1 or 2.