JP2009007889A - Side ditch block and drainage canal constructed by joining the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side ditch block having an upper stage waterway and a lower stage waterway. <P>SOLUTION: In the side ditch block 1, a sectionally U-shaped body 2 extending in a sectionally perpendicular direction and having a bottom face as the lower stage waterway 211, a flange part 3 protruding from one upper edge 221 of the body 2 in the sectional direction of the body 2 and having an upper face as the upper stage waterway 301, and an eave part 4 protruding from the other upper edge 231 of the body 2 in the sectional direction of the body 2 are integrally formed of concrete. The flange part 3 protrudes near the inside face of the body 2 having the other upper edge 231 to form a rainwater drop clearance 31 between the end face of an protruding destination and the inside face of the body 2 having the other upper edge 231. The eave part 4 protrudes right over the rainwater drop clearance 31 to form a rainwater inflow opening 41 between the end face lower edge or the lower face of a protruding destination and the end face upper edge or the upper face of a protruding destination of the flange part 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gutter block having an upper water channel and a lower water channel, and a drainage channel constructed by connecting the gutter blocks.

  A conventional drainage channel is constructed by connecting a gutter block having a U-shaped cross section with a bottom surface as a water channel, and drains rainwater flowing from the road surface along the water channel. In this drainage channel, the side groove block can be closed with a side groove cover, but dust still enters the water channel together with rainwater and needs to be cleaned regularly. Therefore, as can be seen in Patent Document 1, a drainage channel has been proposed in which an inner lid is built in, and a side groove block is constructed in which the upper surface of the inner lid is an upper water channel and the bottom surface of the side groove block is a lower water channel. In Patent Document 1, a concave groove is formed on the outer side surface of the inner lid or the inner side surface of the side groove block, and rainwater overflowing from the inner lid is dropped toward the bottom surface of the side groove block through the concave groove. Garbage that flows into the upper water channel with rainwater cannot pass through the ditch, so that only the upper water channel needs to be cleaned. When the amount of rainwater flowing into the upper water channel increases, rainwater overflows from the upper water channel, flows into the lower water channel from the ditch, and can be drained.

Japanese Unexamined Patent Publication No. 60-181438

  The gutter block of Patent Document 1 places an inner lid on a step formed on the inner surface of the block body. Although the position of the block body is firmly fixed by various known construction methods, the inner lid is merely placed on the step of the block body, and there is a possibility that it will move. That is, the drainage channel constructed by connecting the side groove blocks of Patent Document 1 maintains the continuity of the lower water channel consisting of the bottom surface of the block main body, but there is a possibility that a gap is formed in the upper water channel consisting of the upper surface of the inner lid. . If this gap is narrow, you can still drop the rainwater without dropping it into the lower channel, but it will still clog the garbage, and if the gap gets larger, the garbage will fall into the lower channel, Make garbage cleaning difficult. This is a problem caused by the gutter block of Patent Document 1 having an inner lid placed on the block body.

  Moreover, when the water level of the rainwater which accumulates in the upper stage water channel reaches the horizontal upper end opening of the concave groove, the gutter block of Patent Document 1 drops the rain water from the upper end opening through the concave groove to the lower water channel. That is, when rain water falls from the upper water channel to the lower water channel, the horizontal upper end opening of the concave groove is blocked by the rain water. Since the drainage channel is constructed by connecting a number of gutter blocks, ventilation between the lower water channel and the outside is ensured at any point, but as mentioned above, when the neighboring upper end opening is equally blocked by rainwater , Rainwater will not drop smoothly. Even if rainwater falls smoothly through the ditch into the lower water channel, rainwater covers the horizontal upper end opening of each ditch, so that the rain reaches the upper end opening of the ditch and rainwater falls. In the process, there is also a risk that the dirt will clog the groove. This is due to the fact that the gutter block of Patent Document 1 is configured to drop the rainwater into the lower water channel for the first time when the water level of the rainwater collected in the upper water channel reaches the horizontal upper end opening of the concave groove.

  Even if the water channel of the gutter block is divided into the upper water channel and the lower water channel, it can be considered that the water channel is not necessarily divided if there is no significant difference in the total amount of rainwater that can be drained. However, the side groove block configured to form a shallow upper water channel, drop only the rainwater overflowing from the upper water channel into the lower water channel, and keep the garbage in the upper water channel, the waste cleaning of the drainage channel constructed by connecting the side groove blocks In addition, it is considered preferable because it facilitates maintenance management. Therefore, for the first time, the problem caused by placing the inner lid on the block main body found in the side groove block of Patent Document 1 described above, and the level of rainwater accumulated in the upper water channel reaches the horizontal upper end opening of the groove. In order to solve the problem caused by the construction of dropping rainwater into the lower channel, a new gutter block was examined.

  What has been developed as a result of the examination is a U-shaped main body section extending in the direction perpendicular to the cross section and having a bottom water channel at the bottom surface, and projecting from the one upper edge of the main body section in the cross section direction of the main body section, A flange portion as an upper water channel and a flange portion projecting from the other upper edge portion of the main body portion in the cross-sectional direction of the main body portion are integrally formed of concrete, and the flange portion is a portion of the main body portion having the other upper edge portion. Projected to the vicinity of the inner surface, a rainwater falling gap was formed between the end surface of the projecting tip and the inner surface of the main body having the other upper edge, and the ridge projected to just above the rainwater falling gap. This is a gutter block in which a rainwater inflow opening is formed between the lower edge or lower surface of the end face and the upper edge or upper face of the end face where the flange portion protrudes. The drainage channel is constructed by connecting the gutter blocks of the present invention.

  The main body has a U-shaped cross section in which a pair of vertical side plates is raised from both side edges of a horizontal bottom plate, the bottom surface is the top surface of the bottom plate, the inner surface is the inner surface of each side plate, and the upper edge portion is It is an upper part containing the upper end surface of the said side plate. From this, the side groove block of the present invention has a flange portion extending from the inner surface of the upper portion including the upper end surface of one of the side plates constituting the main body portion, and the flange portion from the inner surface of the upper portion including the upper end surface of the other side plate remaining. It becomes the structure which protruded in steps by the relationship which each opposes. And since the collar part is projected directly above the rainwater fall gap formed between the end surface of the flange part that projects and the inner surface of the upper part including the upper end surface on the other side, the collar part is located above the flange part. . Here, for example, since the expression of the upper part including the upper end surface in one of the side plates constituting the main body is too redundant, the present invention refers to the upper part as one upper edge for convenience of explanation. The upper part including the upper end surface on the other side of the side plate is called the other upper edge.

  If the flange portion protrudes from the inner side surface slightly lower than the upper end surface of the one upper edge portion, an upper water channel having a depth difference from the upper end surface can be formed even if the upper surface is flat. However, the side groove block is normally embedded at a depth that the upper end surface of each upper edge portion follows the road surface, so when the flange portion having an upper surface that is an extension of the upper end surface of one upper edge portion is horizontally extended, The upper surface of the flange portion cannot be an upper water channel. From this, the flange part is good to make the upper surface of the cross-section circular arc shape convex downward into an upper stage water channel, or to make the upper surface of the cross-section triangle shape convex downward into an upper stage water channel. If it is the said flange part, even if the side edge of the upper surface of cross-section circular arc shape or cross-sectional triangle shape corresponds to the upper end surface of one upper edge part, an upper surface can be made into an upper stage water channel. In this case, if the side edge of the upper surface of the cross-sectional arc shape or the triangular cross-section is slightly lower than the upper end surface of the upper edge portion, a deeper upper water channel can be formed, which is preferable.

  The flange portion is configured to be cantilevered by one upper edge portion of the main body portion, and continuously forms a rainwater falling gap along the inner surface of the main body portion. In this case, the drainage channel constructed by connecting the gutter blocks will connect the rainwater fall gap in the extending direction of the drainage channel, and the rainwater flowing through the continuous upper channel of the drainage channel is free from any rainwater fall gap. Can be dropped into the lower canal. However, the flange portion is also an upper structure portion that hides the lower water channel in the side groove block, and there is a high possibility that a pedestrian or the like steps on the flange portion. From this, the flange portion is configured to connect a part of the protruding end surface to the inner side surface of the main body portion having the other upper edge portion, and intermittently form a rainwater fall gap along the inner side surface of the main body portion, In other words, it is preferable that the flange portion is partially bridged over the one upper edge portion and the other upper edge portion.

  Since the gutter block of the present invention only covers the flange portion so as to surround the protruding portion of the flange portion, the rainwater inflow opening and the rainwater falling gap are communicated, and rainwater overflowing from the upper water channel flows into the inflow opening. It can be dropped into the lower canal through the rainwater drop gap. Here, the rainwater inflow opening is open in the horizontal direction. As a result, rainwater overflowing from the upper water channel can flow into the rainwater inflow opening if the water level exceeds the upper edge (upper surface side edge) of the flange portion without blocking the rainwater inflow opening. At this time, if the height of the rainwater inflow opening is sufficiently small, the eaves protruding to the position just above the rainwater falling gap can suppress the entry of dust into the rainwater inflow opening. The specific height of the rainwater inflow opening (the height of the lower surface of the flange with respect to the upper edge of the end face of the flange portion) may be determined according to the size of the dust to prevent entry into the rainwater inflow opening. 30mm is a standard.

  The rainwater drop gap is a groove having a depth corresponding to the height of the end face of the flange portion because the flange portion has a certain thickness in order to ensure sufficient structural strength. For this reason, a difference occurs between the inflow pressure of rainwater flowing into the rainwater inflow opening and the outflow pressure of rainwater falling from the rainwater falling gap as the amount of rainwater flowing into the rainwater inflow opening increases. That is, as the amount of rainwater flowing from the rainwater inflow opening increases, the outflow pressure of the rainwater falling from the rainwater falling gap becomes higher than the inflow pressure of the rainwater flowing into the rainwater inflow opening, and finally the rainwater does not flow into the rainwater inflow opening. Therefore, the rainwater drop gap is a trapezoidal cross section in which either one or both of the front end face of the flange part or the inner side surface of the main body part having the other upper edge part expands downward, and rainwater falling from the rainwater fall gap It is desirable to prevent the rainwater from flowing into the rainwater inflow opening by preventing the outflow pressure of the water from increasing. For example, if the height of the rainwater inflow opening is 5 mm to 30 mm, and the width of the entrance of the rainwater inflow gap is equal to the height of the rainwater inflow opening, the width of the exit of the rainwater inflow gap should be 10 mm to 40 mm. .

  Since the gutter block of the present invention is integrally formed with the main body part that forms the lower water channel and the flange part that forms the upper water channel, only by fixing the position of the side groove block in order to construct the drainage channel, There is an advantage that the lower water channel and the upper water channel can be installed simultaneously. As with the side groove block of Patent Document 1, the work of placing the inner lid on the block body does not require much labor, but it is necessary to install a very large number of side groove blocks to construct the drainage channel. Reducing the number of work procedures has an effect of reducing labor and labor in the construction work of the drainage channel. In the gutter block of the present invention, if the main body portion is fixed, the flange portion is also fixed at the same time, and a gap is formed in the upper water passage on the upper surface of the flange portion, so that there is no risk of dust falling to the lower water passage. The effect which becomes easy is also acquired.

  Further, the gutter block of the present invention blocks the rainwater inflow opening because rainwater flows horizontally into the rainwater inflow opening from the time when the level of rainwater overflowing from the upper water channel exceeds the rainwater inflow opening. There is no. At this time, since the heel portion suppresses the entry of dust into the rainwater inflow opening, the dust is not clogged and the rainwater inflow opening is not blocked, and the dust can be prevented from falling into the lower water channel. And by making the rainwater falling gap into a trapezoidal cross section that expands downward, it is possible to suppress an increase in the outflow pressure of rainwater falling from the rainwater falling gap, and it is possible to eliminate the situation where rainwater does not flow into the rainwater inflow opening. . Thus, the drainage channel constructed by connecting the side groove blocks of the present invention has an effect of allowing only rainwater overflowing from the upper water channel to be smoothly dropped to the lower water channel.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view showing an example of a side groove block 1 according to the present invention, FIG. 2 is a front view of the side groove block 1 of this example, FIG. 3 is a left side view of the side groove block 1 of this example, and FIG. FIG. 5 is a cross-sectional view of the side groove block 1 of this example taken along the line AA in FIG. 2, FIG. 6 is a cross-sectional view of the side groove block 1 of this example taken along the line BB, and FIG. 4 is a cross-sectional view taken along the line CC of FIG. 4 of the side groove block 1 of the example, FIG. 8 is an end view of the drainage channel 5 constructed by connecting the side groove block 1 of this example, and FIG. 9 shows rainwater W from the upper water channel 301 to the lower water channel 211. FIG. 10 is a perspective view showing another example of the side groove block 1, FIG. 11 is a front view of another side groove block 1, and FIG. 12 is another side groove. FIG. 13 is a plan view of another example of the side groove block 1, and FIG. 14 is a cross-sectional view taken along the line DD in FIG. 11 of the example of the side groove block 1. 15 is an end view of the drainage channel 5 constructed by connecting the side groove blocks 1 of another example.

  As shown in FIGS. 1 to 7, the side groove block 1 of this example extends in a cross-sectional orthogonal direction and has a U-shaped main body 2 having a bottom water channel 211 as a bottom surface, and one of the main body 2. A flange portion 3 which projects from the upper edge portion 221 including the upper end surface of the side plate 22 in the cross-sectional direction of the main body portion 2 and has the upper surface as an upper water channel 301, and the other including the upper end surface of the other side plate 23 of the main body portion 2 The flange portion 4 protruding from the upper edge portion 231 in the cross-sectional direction of the main body portion 2 is integrally formed with concrete. The drainage channel 5 is constructed by connecting the side groove blocks 1 of this example. As can be seen from FIG. 1, the gutter block 1 appears to be disconnected from the upper water channel 301 and the lower water channel 211 in appearance. However, the upper water channel 301 and the lower water channel 211 have a rainwater drop gap 31 formed between the end surface of the flange portion 3 protruding and the inner surface of the other side plate 23, and the end portion of the flange portion 4 protruding. A storm water inflow opening 41 formed between the lower surface of the flange portion 3 and the upper surface of the end portion where the flange portion 3 projects is communicated, and rain water overflowing from the upper water channel 301 can be dropped to the lower water channel 211.

  The flange portion 3 connects both end portions in the extending direction of the side groove block 1 sandwiching the rain water dropping gap 31, and connects the projected end surface to the inner surface of the other side plate 23 by the connecting portion 32. On the other hand, it spans the upper edge 231 to ensure sufficient structural strength. In addition, this prevents the rainwater drop gap 31 from appearing on the end face of the side groove block 1, and the closed end face of the side groove block 1 can be formed in which the end faces of the main body part 2, the flange part 3, and the flange part 4 are continuous. The connection between the side groove blocks 1 constituting the drainage channel 5 is easy (can be applied with mortar without worrying about the gap) and strong (can be connected with mortar in a wider range). The upper water channel 301 is formed by the upper surface of the flange portion 3 having a downwardly convex cross-sectional arc shape. In this example, the upper end surface including the protruding end surface, that is, the opening edge serving as the entrance of the rain water drop gap 31 is slightly lowered from the upper end surface of the upper edge portion 221 that is the upper surface of one end portion of the upper water channel 301. The rainwater flows into the rainwater inflow opening 41 before the upper water channel 301 becomes full.

  When rainwater W flows from the upper water channel 301 into the rainwater inflow opening 41, if the height of the rainwater inflow opening 41 is sufficiently small, the ridge 4 that protrudes directly above the rainwater falling gap 31 enters the rainwater inflow opening 41. This can be suppressed. The specific height H of the rainwater inflow opening 41 may be determined in accordance with the size of the dust to prevent the rainwater inflow opening 41 from entering, and is preferably 5 mm to 30 mm, and preferably 10 mm to 20 mm. . In this example, the height H of the rainwater inflow opening 41 is set to 10 mm, and the protrusion A of the collar 4 with respect to the edge of the entrance of the rainwater falling gap 31 is set to 20 mm to make it difficult for dust to flow into the rainwater inflow opening 1. (See FIG. 5). Thereby, for example, dust smaller than the outer diameter of 10 mm falls from the upper water channel 301 to the lower water channel 211, but the dust smaller than the outer diameter of 10 mm can sufficiently flow with rain water falling into the lower water channel 211, so the lower water channel 211 There is little possibility of accumulating. As described above, the rainwater inflow opening 41 has a function of a coarse filter that catches only dust that is likely to accumulate in the lower water channel 211.

  Rainwater that has flowed into the rainwater inflow opening 41 from the upper waterway 301 falls into the lower waterway 211 through the rainwater falling gap 31 that communicates with the rainwater inflow opening 41. At this time, if the outflow pressure of the rainwater falling from the rainwater falling gap 31 becomes higher than the inflow pressure of the rainwater flowing into the rainwater inflow opening 41, the rainwater does not flow into the rainwater inflow opening 41. Therefore, the rainwater fall gap 31 of this example has a rainwater fall gap outlet width D2 larger than the rainwater fall gap entrance width D1, and a main body having a protruding end face of the flange portion 3 and the other upper edge portion 231. By forming the trapezoidal cross section so that both of the inner side surfaces of the portion 2 are expanded downward, the outflow pressure of rainwater falling from the rainwater falling gap 31 is suppressed. For example, when the width D1 of the entrance of the rainwater fall gap 31 is 10 mm, which is equal to the height H of the rainwater inflow opening 41, the exit width D2 of the rainwater fall gap 31 is 20 mm (see FIG. 5).

  As shown in FIG. 8, the gutter block 1 of this example is connected side by side along the curb block 51 on the sidewalk side of the curb block 51 that divides the roadway and the sidewalk, for example, thereby constructing the drainage channel 5. In this example, the other side plate 23 is brought close to the curb block 51 so that the heel part 4 is not easily stepped on by pedestrians or the like. For example, the heel part 4 is brought close to the sidewalk side (the side groove block 1 in FIG. It may be reversed left and right). In this example, the upper surface of the upper water channel 301 formed as the upper surface of the flange portion 3 is flush with the side surface of the upper water channel 301 (the upper end surface of the one side plate 22). It is lower. For this reason, the rainwater W is first stored in the upper water channel 301. If the amount of rainwater W does not increase until it flows into the rainwater inflow opening 41, it flows through the upper water channel 301 as it is, and looks like a conventionally known curb block with a drainage channel.

  When the rainwater W increases, as shown in FIG. 9, the rainwater W starts to flow into the rainwater inflow opening 41 due to the water level of the rainwater W exceeding the upper surface of the end including the protruding end surface of the upper water channel 301. At this time, since the rainwater W does not block all the rainwater inflow openings 1 and a slight gap remains, the air in the internal space including the lower water channel 211 is exchanged from the gap to the outside instead of the fall of the rainwater W. Run away. Further, as described above, since the rainwater falling gap 31 of this example is expanded in a trapezoidal cross section, there is no possibility that the pressure at the outlet exceeds the pressure at the inlet. Thus, the rainwater W flowing from the rainwater inflow opening 1 smoothly falls through the rainwater fall gap 31. The lower water channel 211 has no further part for transferring the rain water W, and only flows the rain water W as it is. However, since the volume is very large compared to the upper water channel 301, the rain water W flows backward through the rain water falling gap 31. There is no fear.

  According to the configuration of the present invention, the specific cross-sectional shape of the upper water channel 301, the cross-sectional shape of the lower water channel 211, the external shape of the main body 2 and the like can be freely set. For example, the side groove block 1 of another example seen in FIGS. 10 to 15 forms an upper water channel 301 as an upper surface having a triangular cross section protruding downward from the flange portion 3. As a result, the side groove block 1 of another example mounts the curb block 51 on the brim part 4 to construct the drainage channel 5, so that the lower edge of the curb block 51 (exactly the side of the curb part 4 following the curb block 51 side). Lower edge) Appears so that the upper water channel 301 falls downward (see FIG. 15). However, since the end top surface including the projecting end surface of the flange portion 3 is naturally higher above the vertex of the deepest triangle of the upper water channel 301, a certain amount of rain water W can be accumulated and flowed. The vertex of the deepest triangle in this example is provided close to the upper surface of the end portion including the projecting end surface of the flange portion 3. You may provide it.

  Further, in the side groove block 1 of another example, the lower water channel 211 has an arcuate cross section that protrudes downward, and the outer surface of the main body 2 also has a lower edge cut out along the lower water channel 211. For this reason, the volume of the lower water channel 211 is slightly smaller than the side groove block 1 (FIGS. 1 to 9) of this example, but the base block that supports the main body 2 can be made smaller, and the concrete construction There is an advantage that the labor and cost can be reduced. In addition, although not shown, the upper water channel 301 of the side groove block 1 of this example is combined with the lower water channel 211 of the side groove block 1 of another example, or conversely, the lower water channel 211 of the side groove block 1 of this example is another example. It is also possible to combine the upper channel 301 of the side groove block 1 or another upper channel or lower channel within a range that does not impair the present invention.

It is a perspective view showing an example of the gutter block based on this invention. It is a front view of the gutter block of this example. It is a left view of the side groove block of this example. It is a top view of the side groove block of this example. It is AA sectional drawing in FIG. 2 of the side groove block of this example. It is BB sectional drawing in FIG. 3 of the side groove block of this example. It is CC sectional drawing in FIG. 4 of the side groove block of this example. It is an end view of the drainage channel constructed by connecting the side groove blocks of this example. FIG. 9 is an end view corresponding to FIG. 8 illustrating a state in which rainwater is dropped from an upper water channel to a lower water channel. It is a perspective view showing another example of a side groove block. It is a front view of the side groove block of another example. It is a left view of the side groove block of another example. It is a top view of the side groove block of another example. FIG. 12 is a sectional view taken along the line DD of FIG. 11 showing another example of the side groove block. It is an end view of the drainage channel constructed by connecting the side groove blocks of another example.

Explanation of symbols

1 Side groove block 2 U-shaped body section
211 Lower waterway (bottom of the main unit)
221 One upper edge
231 Other upper edge 3 Flange
301 Upper waterway
31 Rain water drop gap
32 Connection section 4
41 Rainwater inflow opening 5 Drainage channel

Claims (6)

A body portion having a U-shaped cross section that extends in a direction perpendicular to the cross section and has a bottom surface as a lower water channel, a flange portion that projects from one upper edge of the main body portion in a cross section direction of the main body portion, and has an upper surface as an upper water channel; A flange portion projecting from the other upper edge portion of the main body portion in the cross-sectional direction of the main body portion is integrally formed of concrete, and the flange portion projects to the vicinity of the inner surface of the main body portion having the other upper edge portion, A rainwater fall gap is formed between the end face of the tip and the inner side surface of the main body having the other upper edge, and the flange projects to just above the rainwater fall gap. A gutter block in which a rainwater inflow opening is formed between the upper edge of the end face of the flange portion and the upper edge or upper surface of the flange portion. The gutter block according to claim 1, wherein the flange portion has an upper surface having an arcuate cross-sectional upper surface protruding downward. The gutter block according to claim 1, wherein the flange portion has an upper surface having an upwardly triangular triangular upper surface projecting downward. The flange portion connects a part of the projected end surface to the inner side surface of the main body portion having the other upper edge portion, and intermittently forms a rainwater fall gap along the inner side surface of the main body portion. 3. The gutter block according to any one of the above. 5. The rainwater drop gap has a trapezoidal cross section in which either one or both of the end surface of the protruding flange portion or the inner surface of the main body portion having the other upper edge portion expands downward. Side groove block. A drainage channel constructed by connecting the gutter blocks according to any one of claims 1 to 5.

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