JP2007308954A - Gully unit for drainage and grating lid used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase a water discharging capacity by flowing the rainwater penetrated through a road on which a water permeable asphalt is laid down into a joint box for drainage through a grating lid. <P>SOLUTION: The rainwater penetrated into the road on which the water permeable asphalt 50 is laid down flows into the joint box 110 for drainage through a round hole 123 and a reverse U-shape hole 124 serving as water passing holes formed in all four surfaces of each of the outer frame bodies 121, 122 of the grating lid 120. Therefore, the rainwater can be efficiently discharged. The grating lid 120 is not displaced from the joint box 110 for drainage nor raised since its positioning holes are inserted onto the bolts disposed on a placement surface as the uppermost end surface of the side wall part 111 of the joint box 110 for drainage and the grating lid is fixedly tightened by the nuts. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drainage dredging unit that is installed alone on a road or the like or connected to a concrete gutter such as a U-shaped gutter, and a grating lid used therefor, in particular, a permeable asphalt. The present invention relates to a drainage dredging unit that can improve drainage capacity of rainwater and the like and a grating lid used for the drainage unit.

  2. Description of the Related Art Conventionally, drainage dredging units installed on roads and the like and a grating lid used therefor have been configured as shown in FIGS. Here, FIG. 12 is a perspective view showing the overall configuration of the drainage dredging unit, and shows a case where it is used alone on a road or the like. 13 is a perspective view showing the configuration of the drainage dredge body in the drainage dredge unit of FIG. 12, and FIG. 14 is an exploded view showing the assembly of the drainage dredge body and the grating lid constituting the drainage dredge unit of FIG. It is a perspective view. FIG. 15 is a partial cross-sectional perspective view showing a state in which rainwater or the like flows when the drainage dredging unit of FIG. 12 is independently installed on the road. Further, FIG. 16 is a partial cross-sectional perspective view showing a state in which rainwater or the like flows when the drainage gutter body of the drainage gutter unit shown in FIG.

As shown in the figure, the drainage gutter unit 1 is configured by placing a grating lid 20 on the drainage gutter body 10. Here, the drain main body 10 is formed by pouring concrete into a mold, and the top end surface of the side wall 11 of the main body 10 is provided with a non-slip process for the purpose of reinforcement. The iron plate member 18 is set in advance in the mold and fixed integrally therewith.
When this drainage dredging unit 1 is installed alone on the road, first, the upper surface of the iron plate member 18 fixed to the drainage dredger main body 10 which is slightly larger than the outer shape of the drainage dredge main body 10 on the road. After a square hole having a depth matching the road surface is dug, the drainage dredging main body 10 is deferred. An upper surface of the grating lid 20 is formed by placing the grating lid 20 having substantially the same outer dimensions on the stepped portion 12 formed so as to fall inward from the uppermost end surface of the side wall portion 11 of the drain main body 10. And the drainage dredging unit 1 in which the upper surface of the surrounding iron plate member 18 substantially coincides with the height of the road surface is configured. At this time, a positioning hole (not shown) formed in the grating lid 20 is inserted into the bolts 15 arranged at the four corners of the stepped portion 12 and is tightened with a nut 19 from the upper surface side. 20 is fixed to the drain main body 10 for drainage.

  On the other hand, when the drainage dredge unit is connected to the concrete side groove 30 laid on the road, a shallow groove having a quadrangular shape is formed in the substantially central portion of the side wall portion 11 of the drainage dredge main body 10. Of the closed wall portion 13 that is in a closed state only, for example, two facing portions that are connected to the concrete side groove 30 are cut and removed by a concrete cutter, and the opening 14 is formed. And like the above-mentioned single use state, after installing in the road so that the opening part 14 side of the side wall part 11 of the drainage dredge main body 10 may become the concrete side groove | channel 30 side, the grating lid | cover 20 is attached to the drainage dredge main body 10. By being placed, the drainage trough unit 2 is configured.

By the way, the above-mentioned drainage dredge units 1 and 2 have a grating lid 20 mounted and fixed on a stepped portion 12 that is formed one step down from the uppermost end surface of the side wall portion 11 of the drainage dredge main body 10. It is a configuration. For this reason, even if it says that the iron plate member 18 is being fixed to the uppermost end surface of the side wall part 11 of the drain main body 10, since a big impact is applied to the uppermost end surface of the side wall part 11 from above, It is also conceivable that a part of the uppermost end surface of the side wall portion 11 is cut and a gap is formed or rattling occurs.
Further, when the drainage trough unit 2 is used by being connected to the concrete side groove 30, a rectangular opening 14 is formed at a substantially central portion of the side wall portion 11 of the drainage trough body 10 on the side facing the concrete side groove 30. Is opened, a large force from above is applied to the four corners of the side wall portion 11 of the drainage dredging main body 10 via the iron plate member 18 and the grating lid 20, and the drainage dredge main body. It is also conceivable that 10 is damaged.

In recent years, permeable asphalt is often laid on road foundation concrete. This has advantages such as good drainage of the road when it rains, no rainwater collecting on the permeable asphalt surface, and improved forward visibility of the vehicle driver at night.
However, when the drainage dredging units 1 and 2 are installed on the road as described above, as shown in FIGS. Even if 50 is laid, the rainwater once permeated into the permeable asphalt 50 remains accumulated in the permeable asphalt 50, and in this state, it does not flow into the drainage dredging units 1 and 2. Can not. That is, the rainwater that has permeated into the water-permeable asphalt 50 eventually reaches the surface of the water-permeable asphalt 50, and then the iron plate member 18 fixed to the uppermost end surface of the drainage ridge body 10 of the drainage basin units 1 and 2 is used. It was only possible to get over and flow into the drainage gutter body 10 from the upper surface of the grating lid 20 constituting the drainage gutter units 1 and 2. For this reason, even if the water-permeable asphalt 50 is laid on the road, when the amount of rainfall exceeds a predetermined amount, water floats on the surface of the water-permeable asphalt 50, and the effect is halved. .

  Therefore, the present invention has been made to solve such problems, and can efficiently guide rainwater or the like that has permeated into a road or the like on which water-permeable asphalt is laid, into a drainage basin. It is an object of the present invention to provide a drainage dredge unit that can prevent the drainage dredge from being damaged by getting over and a grating lid used therefor.

  The drainage dredging unit according to claim 1 has a rectangular tube shape having four side wall portions, and the uppermost end surface of the side wall portion is used as a mounting surface of a grating lid having substantially the same outer dimensions, and the grating lid is placed on the mounting surface. And a thin wall portion that seals the inner side of the inverted U-shape with a thinner wall thickness than the surroundings is formed at a substantially central portion of each side wall portion. In the drainage dredge unit comprising the drainage dredge main body formed with an opening that allows inflow and outflow in an open state according to the installation state, the grating lid is restrained from moving by the detent, In this structure, water from the outside of the grating lid flows through the side and top surfaces of the grating lid in a direction perpendicular to the side wall of the drainage ridge body and flows into the drainage basin body.

The drainage dredge unit in the case of carrying out the above invention is constituted by a drainage dredge main body and a grating lid placed thereon. Here, according to the height dimension of the grating lid, the mounting surface of the grating lid whose outer dimensions substantially coincide with the uppermost end surface of the drainage dredge main body formed lower than the surface of the road or the like is the grating lid. Is placed, the upper surface of the grating lid coincides with the surface of a road or the like.
In addition, the detent that restricts the movement of the grating lid disposed on the surface of the drainage dredger body is set according to the position and diameter of the drainage dredge body and the grating lid. What is necessary is just to firmly suppress the relative movement between the main body and the grating lid.

And, according to the situation where the drainage dredge main body is installed, the portion formed in an inverted U-shape and thinner than the surrounding wall thickness at the substantially central portion of each side wall portion of the drainage dredge main body, that is, the drainage dredge When the unit is used alone, by making it a thin wall part that remains closed without being removed, the inflow of water from the outside of the drainage drainage body into the drainage drainage body is prevented, On the other hand, when the drainage dredging unit is used connected to the concrete side gutter, the water from the concrete gutter outside the drainage gutter body is removed by removing the connection side to make it open. Can freely flow into the drainage gutter body.
Furthermore, the structure in which water from the outside of the grating lid in a direction perpendicular to the side wall portion of the drainage dredging body passes through the grating lid and flows into the drainage dredge main body is when water-permeable asphalt is laid. Any structure may be used as long as it allows water to pass through the grating lid and into the drain main body without clogging the asphalt agglomerates. In addition, it is not necessary to completely prohibit the entry of water-permeable asphalt agglomerates into the grating lid, and even in this case, it may be a structure that allows water to pass therethrough. A water passage may be formed. In other words, this grating lid reaches the asphalt surface when rainwater or the like that has fallen on the road penetrates into the permeable asphalt laid on the road and flows from the inside of the asphalt to the drainage dredging unit side. It has a function of passing through the grating lid as it is and pouring it into the drain main body.

In the drainage trough unit according to the second aspect, the detent for restraining the movement of the grating lid is to nut-tighten the grating lid to a bolt disposed on the drainage trough main body side. That is, the grating lid is placed on the placement surface, which is the uppermost end surface of the side wall portion of the drainage culvert body, and the nut is screwed onto the bolt disposed on the placement surface, so that the grating lid is It is fixed to the main body for drainage.
Here, if the bolt disposed on the mounting surface of the drainage culvert body is a male screw such as an anchor bolt, cleaning is performed even if foreign matter such as dust or dirt adheres before the grating lid is mounted. It is easy to tighten, and tightening by screwing a nut or the like becomes easy. In addition, the detent that restrains the movement of the grating lid disposed on the mounting surface of the drainage culvert body may be simply a cylindrical projection member, but its tip is formed in a substantially conical shape. Then, it becomes easy to insert the positioning hole of the grating lid into the detent. The configuration in which movement of the grating lid is restrained by movement is set in accordance with the position and diameter of the movement stopper provided on the drainage culvert body.

The drainage dredge unit according to claim 3 has a structure in which water from the outside of the grating lid passes through the grating lid and flows into the drainage dredge main body in a direction perpendicular to the side wall portion of the drainage dredge main body. In addition, a water passage is formed on two or four opposing surfaces of the outer frame of the grating lid.
Here, in order to allow water from the outside of the grating lid to flow into the drainage jar body through the grating lid in a direction perpendicular to the side wall of the drainage jar body, the outer frame body of the grating lid has a predetermined shape. This is achieved by forming a water passage consisting of or. The water channel formed in the outer frame of the grating lid is when the drainage dredging unit is used alone, or when it is used facing the road side, or connected to a concrete gutter. Depending on whether it is used or not, it will be formed on two or all four surfaces facing each other.
For example, when a drainage dredging unit is used alone on a road where water-permeable asphalt is laid, if water passages are formed on all four sides of the outer frame of the grating lid, rainwater, etc. The drainage capacity will increase. Also, for example, when a concrete gutter is installed on the road and permeable asphalt is laid, and a drainage dredging unit is used facing the road side, the road of the outer frame of the grating lid If water passages are formed on the two opposing surfaces facing the side, the drainage capacity of rainwater and the like will increase, and the other two surfaces on the side connected to the concrete side groove of the outer frame of the grating lid will be passed. There is no need to form a waterway.

According to a fourth aspect of the present invention, the drainage dredging unit is configured such that the water passage of the grating lid is shaped and dimensioned so that asphalt agglomerates laid on the road hardly enter. In other words, the shape and dimensions set for the water passage of the grating lid need not completely prohibit the entry of water-permeable asphalt agglomerates into the water passage of the grating lid. Even if a lump enters, the shape and size may be sufficient as long as a gap through which water can pass is secured.
Therefore, it is necessary to appropriately set the shape and dimensions of the water passage for the grating lid as compared with the water-permeable asphalt agglomerates laid on the road. As the shape and dimensions of the water passage, a shape including a round hole, an inverted U-shaped hole, an oblong hole, and a square hole having a size that does not allow water-permeable asphalt agglomerates to enter is preferable. In addition, as another shape of the water passage, even if the water-permeable asphalt agglomerate gets in or gets clogged somewhat, when the grating lid is lifted, excessive force is applied to the water-permeable asphalt side For example, there are an inverted U-shaped slit shape, an inverted V-shaped shape, a trapezoidal shape, and the like that are open downward. As specific dimensions of the diameter and width as the shape of these water passages, if they are too small, they are likely to be clogged with foreign matters such as dust and dust, and the size and fluidity of water-permeable asphalt agglomerates are taken into consideration. It has been confirmed by the inventors that a maximum value of about 20 mm or less should be applied.

The grating lid according to claim 5 is a rectangular tube shape having four side wall portions, and the uppermost end surface of the side wall portion is a mounting surface having substantially the same outer dimensions, and a detent that restrains movement on the mounting surface is provided. In the grating lid attached to the drainage dredging main body, the grating lid is restrained from moving by the detent, and from the outside of the grating lid in a direction perpendicular to the side wall of the drainage dredge main body. The structure is such that water passes through the grating lid and flows into the drain main body.
Here, the drainage dredge main body having a rectangular tube shape having four side wall portions and having a detent for restraining the movement of the grating lid on the uppermost end surface of the side wall portion, the uppermost end surface of the side wall portion has a grating lid. Since it is the mounting surface of the grating lid that is formed low in accordance with the height dimension and whose outer dimensions are approximately the same, when the grating lid is mounted, it is installed so that its upper surface matches the road surface, etc. do it.
The structure in which water from the outside of the grating lid flows through the grating lid in a direction perpendicular to the side wall portion of the drainage dredge main body and is drained into the drainage dredge main body is laid with water-permeable asphalt. Sometimes, the asphalt agglomerates are not clogged, and any structure may be used as long as the water can be stably passed through the drain lid body and drained through the grating lid.

According to the drainage dredging unit of claim 1, the drainage dredging main body on which the grating lid is placed is installed on the road where the permeable asphalt is laid, so that rainwater that has penetrated into the permeable asphalt Or the like passes through the side or upper surface of the grating lid as it is without reaching the asphalt surface, that is, flows into the drain main body through the grating lid and is drained. Moreover, the uppermost end surface of the side wall portion of the drainage dredge main body is used as a mounting surface for the grating lid, and the upper surface of the grating lid placed on the placement surface of the drainage dredge main body is the same as the surface of the road or the like. Even if a pedestrian, a vehicle, etc. pass by installing so that it may become a surface, the traffic safety is ensured. Moreover, since the detent | locking which restrains the movement of a grating lid is arrange | positioned by the mounting surface of the drain main body, the grating lid does not produce position shift with respect to the main body for drain. In other words, even if a large force is applied from the upper surface of the grating lid, the detent that restrains the movement of the grating lid acts to suppress the displacement of the grating lid, and the drain The structure is received by the wall thickness of the entire side wall portion of the main body, and is not damaged.
Furthermore, the side wall portion of the drainage culvert body has an inverted U shape formed in a substantially central portion, and the upper portion of the thin wall portion formed thinner than the surrounding wall thickness is formed in an arch shape. Of course, when the wall is kept closed according to the installation situation to prevent the inflow of water from the outside into the drainage main body of the water, it is of course open and the water flows from the outside into the main body of the drainage of the drainage water. Even when used as a free opening, the force applied from the upper side of the grating lid to the side wall portion of the drainage culvert body through the grating lid is dispersed and is not damaged.

In the drainage dredging unit according to claim 2, since the detent that restrains the movement of the grating lid is to tighten the grating lid on the bolt disposed on the drainage dredge main body side, the effect according to claim 1 In addition, the bolts and nuts as detents that restrain the movement of the grating lid firmly restrain the movement of the grating lid, so the drainage dredge body and the grating lid are firmly integrated, and the grating lid and drainage Since the relative movement with the main body of the water bottle is restricted, even if a large force is applied from the top surface of the grating lid, the main body of the water drainage can be received with the wall thickness of the entire side wall. The body will not crack or be damaged.
Moreover, even if foreign matter such as dust or dust adheres before the grating lid is placed, the bolt disposed on the drainage jar main body side is easy to drop and the nut can be easily attached. And by tightening the grating lid onto the bolt arranged on the drainage dredge main body side, the movement of the grating lid can be firmly restrained, and the occurrence of rattling noise is prevented by eliminating the lifting. The

  In the drainage dredge unit according to claim 3, the structure in which water from the outside of the grating lid passes through the grating lid and flows into the drainage dredge main body in a direction perpendicular to the side wall portion of the drainage dredge main body. In addition to the effect of claim 1 or claim 2, in addition to the effect of claim 1 or claim 2, the opposing two of the outer frames of the grating lid are formed by forming a water passage on all two or four opposing surfaces of the outer frame. Since water passages are formed on all surfaces or all four surfaces, water from the outside of the grating lid passes through the partition gap on the upper surface and flows into the drainage culvert body. When drainage dredging units are laid on roads where asphalt is laid, it is formed directly on the outer frame of the grating lid without reaching the asphalt surface from inside the permeable asphalt It is possible to increase the drainage capacity by being flowed into the body Masumoto drainage through the the water passage.

  In the drainage dredging unit according to claim 4, the shape and dimensions of the water passage of the grating lid so that the asphalt agglomerates laid on the road with respect to the water passage will not be difficult to remove or clog. In addition to the effect according to claim 3, the effect of allowing permeable asphalt agglomerates to interfere with the passage of rainwater, etc. from the water passage into the drainage culvert body, Even when removing the grating lid from the drainage dredge body after construction and cleaning the drainage dredge body, the permeable asphalt is not damaged. Therefore, it is possible to maintain the effect of allowing rainwater or the like to pass into the drainage gutter body.

The grating lid of claim 5 is a rectangular tube shape having four side walls, and the uppermost end surface of the side wall is a mounting surface having substantially the same outer dimensions, and a detent for restraining movement is arranged on the mounting surface. It is attached to the drainage dredge main body, and the movement is restrained by the detent, so that water from the outside of the grating lid passes through the grating lid in a direction perpendicular to the side wall of the drainage dredge main body. It has a structure that flows into the drainage gutter body.
Thus, when water-permeable asphalt is laid by the structure in which water from the outside of the grating lid passes through the grating lid and flows into the drainage rod main body in a direction perpendicular to the side wall portion of the drainage dredge main body. In addition, the water-permeable asphalt agglomerates are not clogged, and water can be stably passed and drained through the grating lid toward the inside of the drain main body. In addition, a detent for restricting the movement of the grating lid is disposed on the mounting surface which is the uppermost end surface of the side wall of the drainage dredger main body. However, the grating lid is not displaced. The top end surface of the side wall portion of the drainage culvert body is the mounting surface of the grating lid whose outer dimensions are substantially the same, and even if a large force is applied from the top surface of the grating lid, In addition to the effect of suppressing the displacement of the lid, the structure is received by the wall thickness of the entire side wall portion of the drainage culvert body via the grating lid, so that it is not damaged.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the following drawings, in the embodiments, the symmetrical parts are denoted by the same reference numerals, and the same or similar parts as those in the above-described conventional structure are denoted by the same reference numerals, and overlapping thereof. Description to be omitted is omitted.

[Embodiment 1]
FIG. 1 is a perspective view showing the overall configuration of the drainage dredging unit according to the first embodiment of the present invention, which corresponds to the case where the drainage dredging unit is used alone on a road. 2 is a perspective view showing the configuration of the drainage dredge body in the drainage dredge unit of FIG. 1, and FIG. 3 is a block diagram showing details of the grating lid in the drainage dredge unit of FIG. ) Is a plan view of the grating lid as viewed from above, and FIGS. 3B and 3C are side views of FIG. 3A. FIG. 4 is an exploded perspective view showing the assembly of the drainage casket main body and the grating lid constituting the drainage casket unit of FIG. Further, FIG. 5 is a partial cross-sectional perspective view showing a state in which rainwater or the like flows when the drainage dredging unit of FIG. 1 is independently installed on the road.

As shown in the figure, the drainage dredging unit 100 of the present embodiment includes a drainage dredge main body 110 and a grating lid 120. The uppermost end surface of the side wall 111 of the drain main body 110 is used as a mounting surface 112 for the grating lid 120, and the grating lid 120 whose outer dimensions are approximately the same is mounted on the mounting surface 112. In the drain main body 110, a thin wall portion 113 having an inverted U shape and thinner than the surrounding wall thickness is formed by pouring concrete into a mold on the four side wall portions 111 having a rectangular tube shape. Used in the blocked state. In addition, bolts 115 are disposed at the four corners of the mounting surface 112 of the side wall 111 of the drain main body 110, respectively.
In the present embodiment, reinforcing portions 116 with increased wall thickness are formed at the four corners inside the side wall 111 of the drain main body 110, and the side wall from the placement surface 112 of the side wall 111. A plurality of substantially V-shaped notches 117 for assisting the inflow of rainwater or the like are partially formed in a ridge line portion following the inner surface of 111.

Corresponding to the bolts 115 (see FIG. 2 and FIG. 4) disposed at the four corners of the mounting surface 112 of the side wall 111 of the drain main body 110, as shown in FIG. On the lower surface of the plate, plates 128 having positioning holes 129 are fixed at four positions. In other words, the bolt 115 disposed on the drainage culvert body 110 acts as a detent that restrains the movement of the grating lid 120 through the positioning hole 129 of the grating lid 120.
And as shown in FIG.3 (b) and FIG.3 (c), all the 4 surfaces of the side surface which consists of outer frame bodies 121 and 122 among the frame bodies which comprise the grating lid | cover 120 of the drain main body 110 for drainage are shown. A round hole 123 having a predetermined arrangement on the upper side of the side surface and a reverse U having a predetermined arrangement on the lower side so that rainwater and the like can pass from the outer side to the inner side in a direction perpendicular to the side wall 111. An inverted U-shaped hole 124 having a letter-shaped slit shape is formed as a water passage. That is, the four side surfaces including the outer frame bodies 121 and 122 of the grating lid 120 constituting the drainage dredging unit 100 in the present embodiment are constituted by the four plate members on which the water passages are formed. The diameter of the round hole 123 formed as a water passage on the side surface and the slit width of the inverted U-shaped hole 124 allow rainwater to pass therethrough, and the asphalt agglomerates of the permeable asphalt 50 laid on the road are as described above. For example, it is formed to have a size of about 5 to 15 [mm] as a dimension that does not enter and is not clogged with dust or dirt.

  Regarding the installation of the drainage dredge unit 100 of the present embodiment on the road, a square hole slightly larger than the outer shape of the drainage dredge main body 110 is first dug in the road as in the conventional construction method. In the present embodiment, the depth of the square hole is a dimension obtained by adding the height dimension of the grating lid 120 to the vertical dimension of the drainage basin body 110. As a result, the upper surface of the grating lid 120 matches the road surface. Next, the drain main body 110 is placed in the square hole dug in the road. Then, the positioning hole 129 of the grating lid 120 is inserted in alignment with the bolt 115 disposed on the mounting surface 112 which is the uppermost end surface of the side wall portion 111 of the drain main body 110 for drainage, and the nut 119 is inserted into the bolt 115. Screwed together. Thereby, the grating lid 120 is fixed to the drain main body 110 for drainage. Thereafter, the above-described water-permeable asphalt 50 is placed on the road so as to be flush with the upper surface of the grating lid 120 fixed to the drainage dredge main body 110 except for a slight inclination provided on the road surface. Is laid.

Next, with respect to the road where water-permeable asphalt 50 is laid, with reference to FIG. 5, the rainwater flows from the road when the drainage dredging unit 100 of the present embodiment is installed alone, This will be described in comparison with FIG. 15 showing a state of rainwater flowing from the road when the conventional drainage dredging unit 1 is installed alone.
When the conventional drainage dredging unit 1 is installed, the rain that has fallen on the road surface once penetrates into the water-permeable asphalt 50 as described above with reference to FIG. However, even if the rainwater that has penetrated into the water-permeable asphalt 50 is blocked by the cast concrete layer (foundation concrete) 55 and moves through the water-permeable asphalt 50 to the drainage dredging unit 1 side, it is drained as it is. After being unable to flow into the main body 11 and overflowing to the upper surface of the permeable asphalt 50, the upper surface of the iron plate member 18 fixed to the uppermost end surface of the main body 11 for drainage is overcome and the main body for drainage 11 will flow into.

  In contrast, in the case where the drainage dredging unit 100 of the present embodiment is installed, as shown in FIG. 5, the rain that has fallen on the road surface penetrates into the permeable asphalt 50. Then, the lower placement concrete layer 55 is prevented from penetrating, and the inside of the water-permeable asphalt 50 is moved to the drainage dredge unit 100 side. Then, the round hole 123 and the inverted U-shaped hole 124 formed in the outer frame bodies 121 and 122 on the side surface of the grating lid 120 fixed on the placement surface 112 of the drainage jar body 110 of the drainage jar unit 100. Rainwater passes from the outside to the inside and flows into the drain main body 110. As a result, when the drainage dredging unit 100 is installed on the road and the permeable asphalt 50 is laid, the drainage is also drained from the upper surface of the grating lid 120 when a large amount of rain falls. In addition, water does not float on the surface of the water-permeable asphalt 50, and in particular, the forward visibility of the vehicle driver at night is improved.

  As described above, the drainage gutter unit 100 according to the present embodiment has a rectangular tube shape in which the side wall portion 111 has four side surfaces, and the top end surface of the side wall portion 111 has a mounting surface on which the grating lid 120 has substantially the same outer dimensions. 112, and a detent for restraining the movement of the grating lid 120 is provided on the mounting surface 112, and water is supplied from the outside with an inverted U-shape and a thinner wall thickness than the surroundings at a substantially central portion of each side wall 111. The drainage gutter main body 110 is formed by forming a thin wall portion 113 that prevents inflow of water into the interior. The grating lid 120 is restrained from moving by a detent, and the side wall 111 of the drainage gutter main body 110. The water from the outside of the grating lid 120 passes through the grating lid 120 and flows into the drainage basin body 110 in a direction perpendicular to the drainage gutter body 110.

  For this reason, the drainage dredge main body 110 on which the grating lid 120 is placed is installed on the road where the water-permeable asphalt 50 is laid, so that rainwater or the like that has penetrated into the water-permeable asphalt 50 can be removed from the surface of the asphalt. The round hole 123 and the inverted U-shaped hole 124 formed in the outer frame bodies 121 and 122 of the grating lid 120 installed so that the upper surface of the grating lid 120 and the surface of the road or the like are flush with each other. , And flows into the inside from the side surface of the grating lid 120 well, that is, it can be efficiently drained into the drain main body 110 through the outer frame bodies 121 and 122 of the grating lid 120.

  Further, the uppermost end surface of the drainage culvert main body 110 is set as the mounting surface 112 of the grating lid 120 whose outer dimensions are substantially the same, and the upper surface of the grating lid 120 and the surface of the road or the like are installed on the same surface. Thus, even if a pedestrian or a vehicle passes, safety of traffic is ensured. In addition, since a detent for restricting the movement of the grating lid 120 is provided on the mounting surface 112 of the drainage jar main body 110, the grating lid 120 does not shift in position with respect to the drainage jar body 110. . In other words, even if a large force is applied from the upper surface of the grating lid 120, the detent for restraining the movement of the grating lid 120 exerts a restraining force on misalignment on the grating lid 120, and also via the grating lid 120. Therefore, the wall thickness of the entire side wall 111 of the drainage culvert body 110 is received and is not damaged. Further, the side wall 111 of the drain main body 110 remains closed without removing the inverted U-shaped thin wall 113 formed in the substantially central portion. Therefore, the force applied to the side wall 111 of the drain main body 110 from the upper side of the grating lid 120 through the grating lid 120 is dispersed and is not damaged.

And the detent | locking which restrains the movement of the grating lid | cover 120 inserts the positioning hole 129 of the grating lid | cover 120 in the volt | bolt 115 arrange | positioned at the drain main body 110 side, and tightens with the nut 119. Since the bolt 115 and the nut 119 as a detent for restraining the movement of the grating lid 120 firmly restrain the movement of the grating lid 120, the drain main body 110 and the grating lid 120 are firmly integrated, and the grating By constraining the relative movement between the lid 120 and the drain main body 110, the drain main body 110 is received by the wall thickness of the entire side wall 111 even if a large force is applied from the upper surface of the grating lid 120. Therefore, the drain main body 110 is not cracked or damaged.
Further, the bolt 115 disposed on the drain main body 110 side is easily dropped even if foreign matter such as dust or dirt adheres before the grating lid 120 is placed. Then, by inserting the positioning hole 129 of the grating lid 120 into the bolt 115 disposed on the drainage dredge main body 110 side, and tightening with the nut 119, the movement of the grating lid 120 can be firmly restrained and lifted. This eliminates rattling noises.

  Furthermore, the structure in which water from the outside of the grating lid 120 flows into the drainage jar body 110 through the grating lid 120 in a direction perpendicular to the side wall 111 of the drainage basin body 110 of the present embodiment, A round hole 123 and a reverse U-shaped hole 124 are formed as a water passage on all four surfaces of the outer cover body 121, 122 of the grating lid 120. As described above, the round holes 123 and the inverted U-shaped holes 124 as water passages are formed on all four surfaces including the outer frame bodies 121 and 122 of the grating lid 120, and in particular, the permeable asphalt 50 is laid. When the drainage dredging unit 100 is laid on the road or the like formed on the outer frame bodies 121 and 122 of the grating lid 120 without reaching the asphalt surface from the inside of the water-permeable asphalt 50. By passing through the round hole 123 and the inverted U-shaped hole 124 and flowing into the drain main body 110, the drainage capacity can be increased.

  Furthermore, the round hole 123 and the reverse U-shaped hole 124 as the water passage formed in the outer frame bodies 121 and 122 of the grating lid 120 of the present embodiment are asphalt grains in the permeable asphalt 50 laid on the road. The shape and dimensions are such that a lump hardly enters. For this reason, the effect of allowing rainwater or the like to pass through the round hole 123 and the reverse U-shaped hole 124 as a water passage into the drainage dredge main body 110 is obstructed by the water-permeable asphalt agglomerates. Even when the lid 120 is removed from the drainage basin body 110 and the inside of the drainage basin body 110 is cleaned, the permeable asphalt 50 is not damaged. Therefore, it is easy to return the grating lid 120 to its original state. In addition, the effect of allowing rainwater or the like to pass through the drainage gutter body from the round hole 123 and the inverted U-shaped hole 124 as a water passage can be maintained.

In addition, the grating lid 120 according to the present embodiment has a rectangular tube shape with four side walls 111, and the upper end surface of the side wall 111 is set as a mounting surface 112 having substantially the same outer dimensions. The drainage gutter body 110 is provided with a detent for restraining movement, and the grating lid 120 is constrained to move by a bolt 115 as a detent, so that the side wall portion of the drainage gutter body 110 is attached. 111, water from the outside of the grating lid 120 passes through the grating lid 120 and flows into the drain main body 110 in a direction perpendicular to the drain 111.
Water from the outside of the grating lid 120 passes from the side surfaces of the outer frame bodies 121 and 122 of the grating lid 120 to the inner surface in a direction perpendicular to the side wall portion 111 of the drain main body 110 for drainage. When the water-permeable asphalt 50 is laid, the water-permeable asphalt agglomerates are not clogged by the structure flowing into the water, and the water can be stably discharged into the drainage culvert body 110 through the grating lid 120. It can be passed and drained. Further, a nut 119 is fastened to a bolt 115 as a detent for restraining the movement of the grating lid 120 on the mounting surface 112 which is the uppermost end surface of the side wall portion 111 of the drain main body 110, and the movement of the grating lid 120 is performed. The displacement of the grating lid 120 with respect to the drain main body 110 is not caused by the bolts 115 and the nuts 119 that restrain the bolts. And the uppermost end surface of the side wall 111 of the drain main body 110 is the mounting surface 112 of the grating lid 120 whose outer dimensions are substantially the same, and even if a large force is applied from the upper surface of the grating lid 120, In addition to acting to suppress the displacement of the grating lid 120 by the bolt 115 and the nut 119, the structure is received by the wall thickness of the entire side wall 111 of the drainage culvert body 110 via the grating lid 120, and therefore is damaged. There is nothing.

[Embodiment 2]
FIG. 6 is a perspective view showing the overall configuration of the drainage dredging unit according to the second embodiment of the present invention, in which the drainage dredging unit is used in the middle of a concrete gutter that is linearly installed on the road. It corresponds to. 7 is a perspective view showing the entire configuration of the drainage culvert body in the drainage culvert unit of FIG. 6, and FIG. 8 is a structural diagram showing details of the grating lid in the drainage casket unit of FIG. FIG. 8A is a plan view of the grating lid as viewed from above, and FIGS. 8B and 8C are side views of FIG. 8A. FIG. 9 is an exploded perspective view showing the assembly of the drainage casket main body and the grating lid constituting the drainage casket unit of FIG. Further, FIG. 10 is a partial cross-sectional perspective view showing a state in which rainwater or the like flows when the drainage dredging unit of FIG. 6 is connected to a concrete side groove and installed on a road.

  As shown in the figure, the drainage dredging unit 200 in the present embodiment includes a drainage dredge main body 210 and a grating lid 220. Here, the drain main body 210 is formed by pouring concrete into a mold similar to that of the first embodiment. After this, depending on the situation where the drainage dredge main body 210 is installed, for example, among the four portions of the thin wall portion 213 of the side wall portion 211 of the drainage dredge main body 210, it becomes the side connected to the concrete side groove 30. An opening 214 is formed by cutting and removing two opposing portions with a concrete cutter to make it open.

  In addition, bolts 215 are respectively provided at four corners of the mounting surface 212 of the side wall 211 of the drainage tub main body 210, and corresponding to these bolts 215 (see FIGS. 7 and 9), FIG. As shown to a), the plate 228 in which the positioning hole 229 was formed is fixed to the lower surface of the grating lid | cover 220 in four places. Therefore, after the positioning hole 229 of the grating lid 220 is inserted into the bolt 215 of the drainage basin body 210, the nut 219 is screwed to the bolt 215, so that the grating lid 220 is attached to the drainage basin body 210. It is completely fixed and rattling is prevented. In this case, the grating lid 220 is supported by the mounting surface 212 positioned vertically above the side wall portion 211 of the drainage tub main body 210, and lateral displacement is suppressed, so that the load from the upper surface direction of the grating lid 220 is reduced. On the other hand, it has sufficient strength.

Then, as shown in FIGS. 8B and 8C, the outer frame body 221 constituting the two opposing surfaces of the outer frame bodies 221 and 222 constituting the grating lid 220 is applied to the first embodiment. Similarly, the round hole 223 and the inverted U-shaped hole 224 as a water passage are formed so that rainwater and the like can pass from the outside to the inside in a direction perpendicular to the side wall portion 211 of the drainage tub main body 210. Formed and set so that the formed surface is on the road side. The outer frame body 222 constituting the other two opposing surfaces of the grating lid 220 is the side connected to the concrete side groove 30 and the side not facing the water-permeable asphalt 50, so that a water passage is formed. It can be formed with an inexpensive plate member that is not used. Further, the reinforcing part 216 and the notch part 217 in the present embodiment have the same functions and effects as the reinforcing part 116 and the notch part 117 in the first embodiment.
Furthermore, since the inverted U-shaped thin wall portion 213 is removed from the side wall portion 211 to be in an open state, the mounting surface 212 side of the side wall portion 211 on which the opening portion 214 is formed has an arch shape. The force applied to the side wall portion 211 of the drain main body 210 through the grating lid 220 from above the 220 is dispersed and is not damaged.

  Regarding the installation of the drainage dredging unit 200 of the present embodiment on the road, as with the above-described first embodiment, that is, the conventional construction method, first, slightly with respect to the road from the outer shape of the drainage dredge main body 210. A large square hole is dug. In the present embodiment, the depth of the square hole is a dimension obtained by adding the height dimension of the grating lid 220 to the vertical dimension of the drainage basin body 210. As a result, the upper surface of the grating lid 220 matches the road surface. Next, the drainage dredge main body 210 is placed in the square hole dug in the road. Then, the positioning hole 229 of the grating lid 220 is inserted in alignment with the bolt 215 provided on the mounting surface 212 which is the uppermost end surface of the side wall portion 211 of the drain main body 210, and the nut 219 is inserted into the bolt 215. Screwed together. Thereby, the grating lid 220 is fixed to the drain main body 210. Thereafter, the above-described water-permeable asphalt 50 is placed on the road so as to be flush with the upper surface of the grating lid 220 fixed to the drainage dredge main body 210 except for a slight inclination provided on the road surface. Is laid.

Next, with respect to the road where the water-permeable asphalt 50 is laid, the rainwater flowing in from the road when the drainage dredging unit 200 of the present embodiment is connected to the concrete gutter 30 will be described with reference to FIG. Referring to FIG. 16, a description will be given in comparison with FIG. 16, which shows the state of rainwater flowing from the road when a conventional drainage dredging unit is connected to a concrete gutter and installed.
When the conventional drainage dredging unit 2 is installed, as described above with reference to FIG. 16, the rain that has fallen on the road surface once penetrates into the permeable asphalt 50. However, even if rainwater that has permeated into the water-permeable asphalt 50 is blocked by the cast concrete layer 55 and moves through the water-permeable asphalt 50 to the side of the water drainage unit 2, the drainage water main body 10 as it is. After reaching the surface of the water-permeable asphalt 50 and overflowing, it climbs over the upper surface of the iron plate member 18 fixed to the uppermost end surface of the drainage soot body 10 and flows into the drainage soot body 10. It will be.

  On the other hand, in the case where the drainage dredging unit 200 of the present embodiment is installed, as shown in FIG. 10, the rain that has fallen on the road surface penetrates into the permeable asphalt 50. The lower concrete layer 55 is prevented from penetrating and moves in the water-permeable asphalt 50 toward the drainage dredge unit 200 and the concrete side groove 30. Then, a round hole 223 and an inverted U-shaped hole formed in the outer frame body 221 facing the road side of the grating lid 220 fixed on the mounting surface 212 of the drainage dredge main body 210 of the drainage dredge unit 200. Rainwater passes from the outside to the inside of the 224 and flows into the drain main body 210. Thus, when the drainage dredging unit 200 is installed so as to connect to the middle of the concrete gutter 30 installed linearly on the road and the permeable asphalt 50 is laid, when a large amount of rain falls In addition, the water is well drained and water does not float on the surface of the water-permeable asphalt 50. In particular, the forward visibility of the vehicle driver at night is improved.

  As described above, the drainage dredging unit 200 according to the present embodiment has a rectangular tube shape with the four side walls 211, and the mounting surface of the grating lid 220 whose outer dimensions substantially coincide with the uppermost end surface of the side walls 211. 212, a detent for restricting the movement of the grating lid 220 is disposed on the mounting surface 212, and water is supplied from the outside with an inverted U-shape and a wall thickness thinner than the surroundings at a substantially central portion of each side wall portion 211. And a thin wall portion 213 that prevents the inflow of water into the interior, and an opening portion 214 that allows the water from the outside to flow into the interior by forming the thin wall portion 213 in an open state according to the installation situation. The main body 210 is provided, and the grating lid 220 is restrained from moving by a detent, and water from the outside of the grating lid 220 is grating in a direction perpendicular to the side wall portion 211 of the drain main body 210 for drainage. Through 220 is obtained by a structure which flows into the drainage Masumoto body 210.

  For this reason, the drainage dredge main body 210 on which the grating lid 220 is placed is installed on the road where the water-permeable asphalt 50 is laid, so that rainwater or the like that has penetrated into the water-permeable asphalt 50 can be removed from the surface of the asphalt. Without passing through the round hole 223 and the reverse U-shaped hole 224 formed in the outer frame body 221 of the grating lid 220 installed so that the upper surface of the grating lid 220 and the surface of the road or the like are flush with each other. Thus, it can flow into the inside from the side of the grating lid 220 well, that is, drain into the drain main body 210 through the outer frame body 221 of the grating lid 220 efficiently.

  Further, the uppermost end surface of the drainage dredge main body 210 is a mounting surface 212 of the grating lid 220 having substantially the same outer dimensions, and the upper surface of the grating lid 220 and the surface of a road or the like are installed on the same plane. Thus, even if a pedestrian or a vehicle passes, safety of traffic is ensured. In addition, since a detent that restricts the movement of the grating lid 220 is provided on the mounting surface 212 of the drainage tub main body 210, the grating lid 220 is not displaced relative to the drainage jar body 210. . In other words, even if a large force is applied from the upper surface of the grating lid 220, the detent for restraining the movement of the grating lid 220 exerts a restraining force on misalignment on the grating lid 220, and also via the grating lid 220. In this structure, the wall thickness of the entire side wall 211 of the drainage gutter body 210 is received and is not damaged. Further, the side wall portion 211 of the drainage gutter main body 210 has an inverted U-shape formed in a substantially central portion, and an upper portion of a portion formed thinner than the surrounding wall thickness is formed in an arch shape. Is used as a thin wall portion 213 that is blocked according to the installation situation, that is, facing the road side and is prevented from flowing into the drain main body 210 from outside. Of course, the grating is also used in the case where it is used as the opening 214 that is open by facing the concrete side groove 30 and allows the water to flow into the drainage basin body 210 from the concrete side groove 30 side. The force applied to the side wall portion 211 of the drain main body 210 through the grating lid 220 from above the lid 220 will be dispersed and will not be damaged.

The detent for restraining the movement of the grating lid 220 is such that a positioning hole of the grating lid 220 is inserted into a bolt 215 disposed on the drainage dredge main body 210 side and tightened with a nut 219. The bolts 215 and nuts 219 serving as detents that restrain the movement of the 220 firmly restrain the movement of the grating lid 220, so that the drainage gutter body 210 and the grating lid 220 are firmly integrated, and the grating lid 220 and By constraining the relative movement with the drainage basin body 210, even if a large force is applied from the upper surface of the grating lid 220, the drainage basin body 210 can be received by the wall thickness of the entire side wall portion 211. Therefore, the drain main body 210 is not cracked or damaged.
Also, the bolts 215 disposed on the drain main body 210 side are easily dropped even if foreign matter such as dust or dirt adheres before the grating lid 220 is placed. Then, by inserting the positioning hole 229 of the grating lid 220 into the bolt 215 disposed on the drainage jar body 210 side and tightening with the nut 219, the movement of the grating lid 220 can be firmly restrained and lifted. This eliminates rattling noises.

  Furthermore, the structure in which water from the outside of the grating lid 220 flows into the drainage jar body 210 through the grating lid 220 in a direction perpendicular to the side wall portion 211 of the drainage jar body 210 of the present embodiment, A circular hole 223 and a reverse U-shaped hole 224 are formed as water passages on two surfaces of the outer frame body 221 facing each other out of the outer frame bodies 221 and 222 of the grating lid 220. As described above, the circular hole 223 and the reverse U-shaped hole 224 as the water passage are formed on the two surfaces of the outer frame body 221 of the grating lid 220, and in particular, a road or the like on which the permeable asphalt 50 is laid. In the case where the drainage dredging unit 200 is laid, the round hole 223 formed in the outer frame body 221 of the grating lid 220 and the reverse U are formed without reaching from the inside of the water-permeable asphalt 50 to the asphalt surface. By passing through the character hole 224 and flowing into the drain main body 210, the drainage capacity can be increased.

  Furthermore, the round hole 223 and the reverse U-shaped hole 224 as the water passage formed in the outer frame body 221 of the grating lid 220 of the present embodiment are formed of asphalt agglomerates in the permeable asphalt 50 laid on the road. It has a shape and dimensions that hardly enter. For this reason, the effect of allowing rainwater and the like to pass through the round hole 223 and the reverse U-shaped hole 224 as a water passage into the drainage dredge main body 210 is obstructed by the permeable asphalt agglomerates, and the grating is applied after construction. Even when the lid 220 is removed from the drainage gutter body 210 and the inside of the drainage gutter body 210 is cleaned, the permeable asphalt 50 is not damaged, and therefore the grating lid 220 can be easily returned to the original state. Further, the effect of allowing rainwater or the like to pass through the drainage gutter body from the round hole 223 and the reverse U-shaped hole 224 as the water passage can be maintained.

In addition, the grating lid 220 of the present embodiment has a rectangular tube shape with four side walls 211, and the uppermost end surface of the side wall 211 is a mounting surface 212 having substantially the same outer dimensions. The drainage gutter body 210 is provided with a detent for restraining movement, and the grating lid 220 is restrained from being moved by a bolt 215 as a detent to prevent the side wall portion of the drainage gutter body 210 from moving. In this structure, water from the outside of the grating lid 220 passes through the grating lid 220 and flows into the drain main body 210 in a direction perpendicular to 211.
Water from the outside of the grating lid 220 passes from the side surface of the outer frame body 221 of the grating lid 220 to the inner surface in a direction perpendicular to the side wall portion 211 of the drainage jar body 210 and flows into the drainage jar body 210. With this structure, when the permeable asphalt 50 is laid, the water permeable asphalt agglomerates are not clogged and the water is stably passed through the grating lid 220 into the drainage basin body 210. It can be drained. Moreover, a nut 219 is fastened to a bolt 215 as a detent for restraining the movement of the grating lid 220 on the mounting surface 212 which is the uppermost end surface of the side wall portion 211 of the drain main body 210, and the movement of the grating lid 220 is performed. The displacement of the grating lid 220 with respect to the drainage basin body 210 is not caused by the bolts 215 and the nuts 219 that restrain the bolts. And the uppermost end surface of the side wall part 211 of the drain main body 210 is the mounting surface 212 of the grating lid 220 whose outer dimensions are substantially the same, and even if a large force is applied from the upper surface of the grating lid 220, In addition to acting to suppress the displacement of the grating lid 220 by the bolt 215 and the nut 219, the structure is received by the wall thickness of the entire side wall portion 211 of the drainage dredger body 210 via the grating lid 220. Even if the opening 214 in which a part of the side wall 211 of the drain main body 210 is opened is not damaged.

  By the way, as another shape of the water flow path including the round hole and the inverted U-shaped hole formed in the outer frame bodies 121 and 122 of the grating lid 120 and the outer frame body 221 of the grating lid 220 in the above embodiment, FIG. A shape including an oval hole 131 and an inverted V-shaped hole 132 having a size that does not allow the water-permeable asphalt agglomerates of the water-permeable asphalt 50 to enter, as shown in a partial side view in FIG. In particular, the inverted V-shaped 132 at the lower position is similar to the case where the permeable asphalt 50 enters. In order to clean the inside of the drainage dredge units 100 and 200, the grating lids 120 and 220 are lifted and removed vertically. At this time, no excessive force is applied to the permeable asphalt 50 side. Moreover, as another shape of the water channel having the same operation and effect, the outer frame bodies 121 and 122 of the grating lid 120 and the outer frame body 221 of the grating lid 220 are shown in FIGS. A parallel slit shape 134 following an inverted V shape that opens downward, a trapezoidal shape 135 that opens downward, etc., as shown in a partial side view in FIG. Furthermore, the crosspiece members of the grating lids 120 and 220 are formed in place of the outer frame body by partially bending their end sides as shown in a partial side view in FIG. It is also possible to employ a bent portion 136 having a cutout portion 137. That is, the same action and effect can be expected at the notch 137 as a water passage formed by the bent portion 136.

FIG. 1 is a perspective view showing the overall configuration of a drainage dredging unit according to Embodiment 1 of the present invention. FIG. 2 is a perspective view showing the configuration of the drainage culvert body of FIG. FIG. 3 is a block diagram showing details of the grating lid of FIG. FIG. 4 is an exploded perspective view showing the assembly of the drainage gutter body and the grating lid that constitute the drainage gutter unit of FIG. FIG. 5 is a partial cross-sectional perspective view showing a state in which rainwater or the like flows when the drainage dredging unit of FIG. 1 is independently installed on the road. FIG. 6 is a perspective view showing the overall configuration of the drainage dredging unit according to the second embodiment of the present invention. FIG. 7 is a perspective view showing a configuration of the drainage culvert body of FIG. FIG. 8 is a block diagram showing details of the grating lid of FIG. FIG. 9 is an exploded perspective view showing the assembly of the drainage casket main body and the grating lid constituting the drainage casket unit of FIG. 6. FIG. 10 is a partial cross-sectional perspective view showing a state in which rainwater or the like flows when the drainage dredging unit of FIG. 6 is connected to a concrete gutter and installed on a road. FIG. 11 is an explanatory view showing another shape of the water passage formed in the grating lid used in each embodiment of the present invention. FIG. 12 is a perspective view showing an overall configuration of a conventional drainage dredging unit. FIG. 13 is a perspective view showing a configuration of a drainage culvert body in a conventional drainage culvert unit. FIG. 14 is an exploded perspective view showing the assembly of the drainage drainage main body and the grating lid constituting the conventional drainage drainage unit. FIG. 15 is a partial cross-sectional perspective view showing a state in which rainwater or the like flows when a conventional drainage dredging unit is independently installed on a road. FIG. 16 is a partial cross-sectional perspective view showing a state in which rainwater or the like flows when a conventional drainage dredging unit is connected to a concrete gutter and installed on a road.

Explanation of symbols

100,200 Drainage dredge unit 110,210 Drainage dredge body 111,211 Side wall 112,212 Placement surface 113,213 Thin wall 115,215 Bolt (detent)
120, 220 Grating lid 121, 122, 221, 222 Outer frame 123, 223 Round hole (water channel)
124,224 Reverse U-shaped hole (water channel)
214 opening

Claims (5)

It is a rectangular tube shape consisting of four side walls, and the uppermost end surface of the side wall is used as a mounting surface for the grating lid whose outer dimensions are substantially the same, and a detent for restraining the movement of the grating lid is disposed on the mounting surface. In addition, a thin wall portion that seals the inside of the inverted U-shape with a thinner wall thickness than the surroundings is formed at a substantially central portion of each of the side wall portions, and the thin wall portion is in an open state depending on the installation situation. In the drainage dredge unit comprising a drainage dredge body formed with an opening that allows inflow and outflow,
The grating lid is restrained from moving by the detent, and water from the outside of the grating lid passes through a side surface and an upper surface of the grating lid in a direction perpendicular to the side wall portion of the drainage gutter body. A drainage dredge unit characterized by having a structure that flows into the main dredge body.   2. The drainage dredge unit according to claim 1, wherein the detent that restrains the movement of the grating lid is configured to nut-tighten the grating lid to a bolt disposed on the drainage dredge main body side.   The structure in which water from the outside of the grating lid flows through the side surface of the grating lid in the direction perpendicular to the side wall portion of the drainage ridge body and flows into the drainage basin body is the outer frame body of the grating lid. The drainage dredging unit according to claim 1 or 2, wherein a water passage is formed on two or four surfaces facing each other.   The drainage dredging unit according to claim 3, wherein the water passage on the side surface of the grating lid is shaped and dimensioned so that asphalt agglomerates laid on the road hardly enter. A drainage trough having a rectangular tube shape composed of four side wall portions, the uppermost end surface of the side wall portion being a mounting surface having substantially the same outer dimensions, and a detent for restraining movement on the mounting surface described above. A grating lid attached to the main body,
The movement of the grating lid is restrained by the detent, and water from the outside of the grating lid passes through a side surface of the grating lid in a direction perpendicular to the side wall of the drainage dredger main body, and the drainage bottle. A grating lid characterized by a structure that flows into the body.

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