JP3238235U - Invert block - Google Patents

Abstract

[Problem] To prevent clogging with dead leaves and garbage as much as possible, to enable adjustment in the vertical direction to correspond to various inflow and outflow pipes, and to enable installation regardless of the size of the edge block opening of a drain pit or the like. The purpose was to provide an inverted block that SOLUTION: A bottom block 2, which is the bottom of a manhole or various drainage basins and is connected to an outflow pipe 4 for flowing wastewater or the like downstream; In the inverted block 1 formed with the drainage channels 5 and 12 for guiding the drainage and the like toward, the drainage channels 5 and 12 formed on the upper surface and inclined downward for guiding the drainage and the like toward the outflow pipe 4; Water collection surfaces 6 and 11 inclined downward toward the drainage channels 5 and 12 and/or the outflow pipe 4 are formed from the outer peripheral portions 6A and 11A of the upper surface. [Selection drawing] Fig. 1

Description

The present invention relates to an invert block made of precast concrete, which is provided in a bottom block used for a manhole or a bottom portion of various drainage basins and forms a drainage channel.

For example, it is desirable that a flow path is formed at the bottom of a manhole (human hole) or a drainage basin in order to smooth the flow of water. However, especially when a flow path is formed in an existing manhole or drainage basin, the shape of the manhole and the bottom block of the basin, that is, the position and number of drainage drainage pipes of the bottom block to be constructed, etc. vary. Since it was necessary to deal with this, it was very time-consuming and time-consuming to pour ready-mixed concrete at the site, form a rough flow path shape, and finally plasterer to form it with mortar.

Therefore, in Patent Document 1, in order to correspond to various inflow / outflow angles and the number of inflows, a manhole bottom mass having a recess in the center of the upper surface and providing a gutter-shaped flow path between the recess and the outer periphery. A manhole bottom mass made of precast concrete is disclosed, wherein the recess has a rotating body shape such as a hemisphere or a polygonal shape similar to the rotating body shape.

By precasting this bottom mass, it can be manufactured under sufficient quality control in a specialized factory, so it is possible to prevent problems such as peeling of the mortar surface, holes, and shapes that obstruct running water as much as possible. It was possible to produce a bottom mass of a high-quality flow path. Furthermore, since only the bottom block of the concrete product is installed, the work time at the site can be significantly shortened.

Japanese Unexamined Patent Publication No. 7-82788

However, the manhole bottom mass (hereinafter referred to as an invert block) disclosed in Patent Document 1 has a recess in the center of the upper surface, and only a gutter-shaped flow path is provided between the recess and the outer periphery. Depending on the size and shape of dead leaves and dust that flow from the surrounding area, dead leaves and dust may accumulate and rot, causing stinks, or becoming a source of wrigglers and becoming a hotbed for infectious diseases. There was a risk of becoming a problem.

In addition, relatively detailed dimensional data such as the depth of the bottom block and the installation position of the inflow and outflow pipes are required, but especially in the case of existing manholes and drainage basins, mud and dust have already settled, so it is accurate. It was difficult to measure the depth dimensions. When a concrete product is manufactured based on inaccurate data, there is a risk that the flow path of the concrete product and the outflow pipe may not match when actually installed.

Further, the size of the edge mass opening to which the lid on the upper part of the drainage basin fits is often smaller than that of the bottom mass block, and when the invert block disclosed in Patent Document 1 is adjusted to the size of the bottom mass block, the edge mass opening is formed. There was a problem that the water could not pass through, and there was a problem that the gap generated between the invert block and the bottom block was increased when the size of the edge block opening was adjusted.

The present invention was made in view of such problems, and it is possible to prevent clogging of dead leaves and dust as much as possible, and to adjust in the vertical direction in order to cope with various outflow and inflow pipes, and further, a drainage basin, etc. The purpose was to provide an invert block that can be installed regardless of the size of the edge mass opening.

The invert block according to claim 1 of the present invention is the bottom of a manhole or various drainage basins, and is installed on the upper surface of an invert block installed in a bottom block to which an outflow pipe for draining drainage or the like is connected downstream. At the same time, a downwardly inclined drainage channel for guiding drainage and the like toward the outflow pipe and a downwardly inclined water collecting surface from the outer peripheral portion of the upper surface toward the drainage channel and / or the outflow pipe were formed. It is characterized by that.

Further, the invert block according to claim 2 is characterized in that, in the invert block according to claim 1, a filler whose dimensions can be adjusted in the height direction is provided on the lower side thereof.

Further, the invert block according to claim 3 is characterized in that, in the invert block according to claim 1 or 2, one piece is composed of divided pieces divided into a plurality of pieces so as to have a predetermined weight or less and a predetermined shape.

Furthermore, the invert block according to claim 4 is the invert block according to claim 3, characterized in that each of the divided pieces is provided with a coupling device for connecting the divided pieces.

The invert block according to claim 1 of the present invention is formed on the upper surface and has a downwardly inclined drainage channel that guides drainage or the like toward the outflow pipe, and the drainage channel and / or the outflow from the outer peripheral portion of the upper surface. Since the catchment surface is inclined downward toward the pipe, no matter where dead leaves or dust fall on the upper surface of the invert block, it slides down into the drainage channel and then is sent to the outflow pipe or directly to the outflow pipe. Will be done. Therefore, clogging due to dead leaves and dust can be prevented as much as possible, and since the drainage flows smoothly, sedimentation of dust and mud can be prevented as much as possible, so that the occurrence of wriggler due to water retention can be prevented as much as possible. Is.

Further, the invert block according to claim 2 has various bottom block blocks because the invert block can be adjusted in the vertical direction by providing a filler whose dimensions can be adjusted in the height direction on the lower side. It can be installed at the optimum height according to the outflow pipe. By locating the lowermost end of the drainage channel within the diameter of the outflow pipe, it is possible to prevent the occurrence of a stepped space where water retention occurs and drainage can flow smoothly, causing the occurrence of wriggler due to water retention. It can be prevented.

Further, the invert block according to claim 3 is composed of divided pieces divided into a plurality of pieces so that one piece has a predetermined weight or less and a predetermined shape, so that one divided piece has a weight that does not impose a workload. By doing so, the installation workability can be improved. Further, even if the size of the edge mass opening of the drainage basin is smaller than the bottom of the bottom mass block, the size of the divided pieces may be the size that passes through the edge mass opening, so that there are various types such as a circle, a rectangle, and a square. It can correspond to the edge mass opening shape.

Furthermore, the invert block according to claim 4 is provided in each of the divided pieces, and by providing a coupling device for connecting the divided pieces, the distance between the divided pieces can be reduced, so that the gap between the divided pieces can be reduced. It is possible to prevent the stagnation of water and prevent the occurrence of wriggler due to the stagnation as much as possible.

FIG. 1 is a plan view of the invert block of the first embodiment of the present invention. FIG. 2 is a plan view of a one-sided component obtained by dividing the invert block of the first embodiment of the present invention into two parts. FIG. 3 is a front view of the invert block of the first embodiment of the present invention. FIG. 4 is a side view of the invert block of the first embodiment of the present invention. FIG. 5 is a side view showing a state in which the invert block of the first embodiment is installed on the bottom block with a deep bottom. FIG. 6 is a side view showing a state in which the invert block of the first embodiment is installed on the bottom block with a shallow bottom. FIG. 7 is a plan view of the rectangular invert block of the second embodiment of the present invention. FIG. 8 is a front view of the rectangular invert block of the second embodiment of the present invention. FIG. 9 is a front view of a coupling device for connecting the divided pieces of the invert block according to the third embodiment of the present invention. FIG. 10 is a plan view of a coupling device for connecting the divided pieces of the invert block according to the third embodiment of the present invention. FIG. 11 is a side view of a coupling device for connecting the divided pieces of the invert block according to the third embodiment of the present invention. FIG. 12 is a plan view of the invert block of the third embodiment of the present invention. FIG. 13 is a vertical sectional side view of the invert block of the third embodiment of the present invention.

As shown in FIGS. 5 and 6, the invert block 1 of the present invention is used for, for example, a manhole buried in the ground or the bottom of various drainage basins, and the bottom to which the inflow pipe 3 and the outflow pipe 4 of the drainage are connected. It is arranged at the bottom of the block 2 and has an inclined drainage channel 5 for flowing rainwater flowing into a manhole or a drainage basin or drainage flowing from an inflow pipe 3 to an outflow pipe 4. be.
Hereinafter, the first embodiment of the present invention will be described in detail with reference to the drawings.

FIGS. 1 to 4 show a cylindrical invert block 1 made of precast concrete of the present invention, and has a mortar-shaped water collecting surface 6 inclined downward from the outer peripheral portion 6A of the upper surface toward the central portion 6B. One end is connected to the central portion 6B of the water collecting surface, the other end is connected to the outflow pipe 4, and a drainage channel 5 having a U-shaped cross section inclined downward from the central portion 6B toward the outflow pipe 4 is provided. Further, a notch is formed in the outer peripheral portion 6A over the entire circumference, so that when the invert block 1 is installed in the bottom block block 2, an adhesive such as cement does not flow into the water collecting surface 6 side. There is.

Further, as shown in FIG. 2, the invert block 1 of the first embodiment is from the left and right divided pieces 1A and 1B which are divided into two around the drainage channel 5 so that one piece is semicircular and the weight is about 20 kg or less. It has a structure of. Since this is a reasonable weight when working manually, in the case of a large invert block 1, one component may be divided into a large number so as to be 20 kg or less.

Further, by dividing into a plurality of pieces, even if the size of the edge mass opening of the drainage basin is smaller than the bottom portion in the bottom mass block 2, that is, the invert block 1 itself is larger than the edge mass opening of the drainage basin, the divided pieces. It can be easily installed by setting the size of 1A and 1B to be large enough to pass through the edge mass opening. With this divided structure, it is possible to correspond to various edge mass opening shapes such as a circle, a rectangle, and a square.

Next, a in FIG. 3 is the radius of the invert block 1, and b is the height dimension of the outer peripheral portion 6A and the central portion 6B of the catchment surface. In the first embodiment, since the diameter is 470 mm, the radius a is 235 mm, and the height b is in the range of 40 mm to 60 mm, the inclination angle θ is in the range of 10 degrees to 14 degrees.

Further, 9 is an idiot hole through which a bolt 7 for adjusting the height of the invert block 1 is inserted and a nut 8 into which the bolt 7 is screwed is installed at a predetermined height. The idiot hole 9 is an idiot hole of the invert block 1. There are 3 places on one side and 6 places in total on the left and right. The bolt 7 forms a space under the invert block 1 for filling the filler 10 such as mortar or concrete.

In this way, the bolt 7 forms a space under the invert block 1 in which the heights of the drainage flow path 5 and the outflow pipe 4 of the bottom block 2 are matched, and the space is filled with the filler 10. , It is possible to correspond to the outflow pipe 4 of various existing bottom block blocks 2. The stupid hole 9 positions the invert block 1 and is filled with the filler 10 and then closed with cement or the like.

That is, when the position of the outflow pipe 4 of the bottom block 2 is high as shown in FIG. 5, the space under the invert block 1 is raised to fill a large amount of the filler 10, and the bottom block 2 is filled as shown in FIG. When the position of the outflow pipe 4 is low, the space under the invert block 1 is lowered and the filler 10 is filled in a small amount, so that many existing and newly installed bottom block blocks 2 can be accommodated.

As described above, in the invert block 1 of the first embodiment, the water collecting surface 6 inclined downward from the outer peripheral portion 6A of the upper surface toward the central portion 6B, one end thereof is the central portion 6B of the water collecting surface, and the other end is the outflow pipe 4. Since the drainage flow path 5 is formed so as to be inclined downward in the direction of the outflow pipe 4, no matter where the dead leaves or dust fall on the upper surface of the invert block 1, it will slide down to the central portion 6B. It will slide down the drainage channel 5 from the central portion 6B and be sent to the outflow pipe 4. Therefore, it is possible to prevent clogging due to dead leaves and dust as much as possible, and it is possible to prevent sedimentation of dust and mud as much as possible because the drainage flows smoothly, so that the occurrence of wriggler due to water retention can be prevented as much as possible.

Further, in order to enable the vertical adjustment of the invert block 1 by providing the filler 10 whose dimensions can be adjusted in the height direction under the invert block 1, various bottom block blocks 2 can be adjusted. It can be installed at an optimum height according to the outflow pipe 4. By locating the lowermost end of the drainage flow path 5 within the diameter of the outflow pipe 4, it is possible to prevent the occurrence of a stepped space where water stays and allow the drainage to flow smoothly.

FIGS. 7 and 8 show the rectangular invert block 1 of the second embodiment of the present invention, and the main components other than the shape of the invert block 1 are the same as those of the first embodiment. The invert block 1 of the second embodiment is made of precast concrete and has a rectangular shape, and has a water collecting surface 11 inclined downward from the outer peripheral portion 11A of the upper surface toward the outflow pipe 4 of the bottom block block 2, and the water collecting surface 11. It is provided with a drainage channel 12 having a U-shaped cross section, which is formed on the top and extends in the front-rear direction for connecting the inflow / outflow pipes 3 and 4. In the second embodiment, the drainage flow path 12 is linear because it is used for the bottom block 2 having a structure in which the inflow pipe 3 and the outflow pipe 4 are opposed to each other. It may have a shape corresponding to the arrangement of 4, for example, an L shape.

The drainage flow path 12 is provided with an inflow section 12A for receiving the drainage from the inflow pipe 3 and a drainage section 12B for sending the drainage in the direction of the outflow pipe 4, from the inflow section 12A toward the drainage section 12B. It is tilted downward. Further, the inflow portion 12A is formed wider than the drainage portion 12B, so that the drainage from the inflow pipe 3 can be reliably received. Further, the width of the drainage portion 12B is set to a size within the diameter range of the outflow pipe 4, and the lower end of the drainage portion 12B is installed so as to be located within the diameter range of the outflow pipe 4.

With the above structure, dead leaves and dust that have entered from the upper surface of the invert block 1 or the inflow pipe 3 can slide down directly from the water collecting surface 11 to the outflow pipe 4, or from the water collecting surface 11 to the drainage flow path 12. After entering, it will slide down from the drainage portion 12B to the outflow pipe 4. Therefore, it is possible to prevent clogging due to dead leaves and dust as much as possible, and it is also possible to prevent sedimentation of dust and mud as much as possible because the drainage flows smoothly. Further, by locating the lowermost end of the drainage portion 12B of the drainage flow path 12 within the diameter range of the outflow pipe 4, it is possible to prevent the generation of a stepped space where water retention occurs and allow the drainage to flow smoothly.

9 to 11 show the coupling device 13 of the third embodiment of the present invention, and as shown in FIGS. 12 and 13, the left and right divided pieces 1A and 1B are coupled so as not to be separated from each other. The main components are the same as those in Examples 1 and 2.

The coupling device 13 of the third embodiment is L-shaped with a fixing arm 14 embedded in each of the left and right divided pieces 1A and 1B of the invert block 1 and a connecting arm 15 bent at a right angle from the end of the fixing arm 14. It is what makes up. Further, the fixed arm 14 is formed with an elliptical through hole 16 so as to correspond to the stupid hole 9 (not shown in FIG. 13), and the bolt 7 for adjusting the height can be inserted. It has become. Further, a U-shaped notch 18 into which the screw portion of the connecting bolt 17 fits is formed in the upper portion of the connecting arm 15. Reference numeral 19 is a connecting nut screwed into the connecting bolt 17.

Further, as shown in FIGS. 12 and 13, a groove for bolt tightening work for tightening the connecting bolt 17 and the connecting nut 19 set between the connecting arms 15 is formed at the connecting portion of the left and right divided pieces 1A and 1B of the invert block 1. 20 is formed. The groove 20 is open to the water collecting surface 6 and the drainage channel 5, and the depth thereof is formed to be at least deeper than the height dimension of the connecting arm 15.

With the above structure, the left and right divided pieces 1A and 1B are butted against each other, and the connecting arms 15 are placed at opposite positions, and then the connecting bolt 17 is fitted into the notch 18 and the connecting nut 19 is tightened. After connecting the left and right divided pieces 1A and 1B to each other, the groove 20 is filled with mortar or the like to smooth the surface. As a result, the left and right divided pieces 1A and 1B are firmly connected to each other and the interval can be reduced, so that it is possible to prevent a gap from being generated between the left and right divided pieces 1A and 1B as much as possible.

As described in detail above, according to the invert block 1 of the present invention, a bottom block 2 which is a bottom of a manhole or various drainage basins and to which an outflow pipe 4 for draining drainage or the like is connected and a bottom block 2 thereof. In the invert block 1 which is installed in the block 2 and has drainage channels 5 and 12 for guiding drainage and the like toward the outflow pipe 4, the drainage and the like are formed on the upper surface and drainage and the like toward the outflow pipe 4. A downwardly inclined drainage channel 5 and 12 to be guided and a downwardly inclined water collecting surface 6 and 11 from the outer peripheral portions 6A and 11A of the upper surface toward the drainage channel 5 and 12 and / or the outflow pipe 4 are formed. Therefore, no matter where the dead leaves or dust fall on the upper surface of the invert block 1, they are slid down to the drainage channels 5 and 12 and then sent to the outflow pipe 4 or directly to the outflow pipe 4. Therefore, it is possible to prevent clogging due to dead leaves and dust as much as possible, and it is possible to prevent sedimentation of dust and mud as much as possible because the drainage flows smoothly, so that the occurrence of wriggler due to water retention can be prevented as much as possible.

Further, the invert block 1 of the present invention is provided with a filler 10 whose dimensions can be adjusted in the height direction on the lower side, so that the invert block 1 can be adjusted in the vertical direction. It can be installed at an optimum height according to the outflow pipe 4 of the block 2. By locating the lowermost ends of the drainage channels 5 and 12 within the diameter of the outflow pipe 4, it is possible to prevent the occurrence of a stepped space where water stays and allow the drainage to flow smoothly. Therefore, it is possible to prevent the occurrence of wriggler or the like due to water retention.

Further, the invert block 1 of the present invention is composed of divided pieces 1A and 1B, each of which is divided into a plurality of pieces so as to have a predetermined weight or less and a predetermined shape, so that one divided piece 1A and 1B can be loaded. Installation workability can be improved by making the weight less expensive. Further, even if the size of the edge mass opening of the drainage basin is smaller than the bottom portion in the bottom mass block 2, the size of the divided pieces 1A and 1B may be a size that passes through the edge mass opening. It can correspond to various edge mass opening shapes such as squares.

Furthermore, the invert block 1 of the present invention is provided in each of the divided pieces 1A and 1B, and is provided with a coupling device 13 for connecting the divided pieces 1A and 1B to each other. Since the interval can be reduced, water retention in this gap can be prevented, and the occurrence of bow wriggler due to water retention can be prevented as much as possible.

1 Invert block 1A Right split piece 1B Left split piece 2 Bottom block 3 Inflow pipe 4 Outflow pipe 5 Drainage channel 6 Water collecting surface 6A Outer part 6B Central part 7 Bolt 8 Nut 9 Stupid hole 10 Filling material 11 Water collecting surface 11A Outer part 12 Drainage flow path 12A Inflow part 12B Drainage part 13 Coupling device 14 Fixing arm 15 Connecting arm 16 Through hole 17 Connecting bolt 18 Notch 19 Connecting nut 20 Groove

Claims (4)

In the invert block installed in the bottom block that is connected to the outflow pipe that drains drainage etc. downstream at the bottom of manholes and various drainage basins.
A drainage channel that is formed on the upper surface and is inclined downward to guide drainage etc. toward the outflow pipe.
An invert block characterized in that a drainage flow path and a water collecting surface inclined downward toward the outflow pipe are formed from an outer peripheral portion of an upper surface. The invert block according to claim 1, wherein a filler having adjustable dimensions in the height direction is provided on the lower side. The invert block according to claim 1 or 2, wherein one piece is composed of divided pieces divided into a plurality of pieces so as to have a predetermined weight or less and a predetermined shape. The invert block according to claim 3, wherein each of the divided pieces is provided with a coupling device for connecting the divided pieces.

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