JP2000104328A - Drainage basin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage basin with a simple constitution capable of using a conventional mold by making device a little on the mold in the case of molding of a synthetic resin as a material, molding a drainage basin without burring even if the side thereof is thin without deteriorating the function without the deformation of a side wall by contraction directly after the molding. SOLUTION: A drainage basin is equipped with a basin main body 10 connected to a rain water drainage gutter and an inside cage 30 stored to the inside of an outside cage 20 and filtering dust, etc., through inside drain outlets 33 formed in the side, etc. In that case, the inside cage 30 is so constituted that circular stage sections 32 are provided to the upper side part thereof and, at the same time, the inside drain outlets 33 in the inside cage 30 are so constituted that the upper ends are opened in the circular stage sections 32 and that the lower ends are positioned to a side wall 31b of the inside cage 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage trough which is installed around a house or the like and is used to collect rainwater and flow it into a drain, or to infiltrate into the ground. The present invention relates to a drainage trough provided with an inner basket.

[0002]

2. Description of the Related Art In general, drainage troughs are buried in the soil while being connected in the middle of a drainage ditch. There are two types, "rainwater infiltration trout", which returns part of the rainwater that has been returned to the ground. This “rainwater trout” is used to allow the collected rainwater and the like to flow stably through the drainage ditch when the sewage is maintained, etc.
Is used to infiltrate the collected rainwater into the underground before draining it into the drain to prevent any increase in the amount of water in rivers or the decrease in groundwater. Is what is coming. The rainwater that could not penetrate into the ground with the “rainwater infiltration mass” is drained to sewage or the like through a drain.

[0003] Examples of such drainage cells such as "rainwater trout" or "rainwater infiltration trout" include, for example, Japanese Utility Model Laid-Open No. 5-4.
Various proposals have been made in, for example, Japanese Patent Publication No. 2382, Japanese Patent Application Laid-Open No. 9-189065, and the like. In such a drainage trough, rainwater that has fallen through the upper connecting trough is guided into the inner cage, and pebbles and fallen leaves are filtered out by a number of drainage holes formed in the inner cage. It is returned to the ground from each drainage port of the stored outer basket.

By the way, for example, Japanese Patent Application Laid-Open No. Hei 9-1890 describes
In the drainage mass proposed in Japanese Patent Publication No. 65, as shown in FIG. 8, a large number of drainage holes formed in the inner cage are formed into “holes 4a or 1” having a smaller diameter toward the lower side.
However, when these holes are formed in a synthetic resin mass by molding, the following problems may occur.

That is, the hole 4a or 11a shown in FIG. 8 of the conventional example is for filtering sand, small stones, fallen leaves, and the like, and has a smaller diameter toward the lower side. It is a small thing. For this reason, these holes are difficult to form on the relatively thin sides of the mass. Further, in the mold in which the inner and outer cages having the thin side surfaces are molded with the synthetic resin as described above, the "die removing taper" corresponding to the inclination of the side surfaces of the two cages cannot be so large. Therefore, the hole 4a shown in FIG.
Alternatively, so-called "burrs" are easily generated around 11a, so that not only is the work of removing burrs difficult, but also clogging is easily caused by the burrs.

Further, since the hole 4a or 11a shown in FIG. 8 for flowing rainwater into the soil is merely a round hole, there is a possibility that the hole 4a or 11a may be blocked by fallen leaves, paper debris, or the like entering the inside. There is enough. First, the hole 4 shown in FIG.
a or 11a is used for straining pebbles, fallen leaves, etc., but since no measures have been taken against this, there is a high possibility that clogging will occur due to the strained fallen leaves, etc. It is.

Therefore, the present inventor has found that, when the inner basket constituting this kind of drainage trough is formed using a synthetic resin as a material, the function of removing pebbles, fallen leaves and the like is not impaired. The present invention has been completed as a result of various studies on how to make it sufficiently free from occurrence.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and the problems to be solved are as follows.
Mainly, the drainage port for straining pebbles, fallen leaves, and the like has a structure that does not cause clogging.

That is, first, the object of the invention according to claim 1 is that, when injection molding is performed using a synthetic resin as a material, a conventionally used molding die can be used with a little devising. To provide a drainage mass with a simple configuration that can be molded without burrs even if the side surface is thin, and does not impair its function without side wall deformation due to shrinkage immediately after molding. is there.

The object of the invention according to claim 2 is to achieve the object of claim 1 described above,
In addition, it is an object of the present invention to provide a drainage trough that does not cause clogging due to paper waste and fallen leaves.

[0011]

SUMMARY OF THE INVENTION In order to solve the above problems, first, means adopted by the invention according to claim 1 will be described with reference numerals used in the description of the embodiments described below. "The mass body 1 connected to the drain for rainwater
0 and the outer basket 2 attached to the lower end of the mass body 10
0 and an inner basket 3 that is housed in the outer basket 20 and that filters out dust and the like through an inner drain port 33 formed on the side surface or the like.
0, the inner basket 30
Has an annular step portion 32 in the upper portion, and each inner drainage port 33 of the inner cage 30 has an upper end opening to the annular step portion 32 and a lower end formed in a side wall 31b of the inner cage 30.
And a drain-shaped mass 100 "characterized by having a slit-like shape.

That is, as shown in FIG. 1 or FIG. 2, the drainage mass 100 according to the present invention is buried in the ground so that its upper end opening 13 is substantially the same as the ground surface. An outer cage 20 integrated with the lower part of the mass body 10 and buried in the soil together with the lower part of the mass body 10, and an inner cage 30 inserted into and out of the outer cage 20 through the upper end opening 13 of the mass body 10. Things.

The inner basket 30 which constitutes the drainage mass 100 is formed by the forming die shown in FIGS. 3 and 4. The inner basket 30 is formed by a lower sloped upper side wall 31a and a continuous upper side wall 31a. The lower side wall 31b having a large inclination,
At the boundary between the upper side wall 31a and the lower side wall 31b, there is provided a step portion 32 which becomes substantially horizontal when the drainage mass 100 is buried in the soil.

The drainage mass 1 according to the first aspect.
In FIG. 00, in particular, for the inner basket 30, as shown in FIGS. 1, 2 and 5, a plurality of inner drain holes 33 are formed in the vicinity of the annular step portion 32 formed in the upper portion. The upper ends of the inner drainage holes 33 are open to the annular step portion 32, and the lower ends thereof are formed in a slit shape having a position on the lower side wall 31 b of the inner cage 30.

Since each of the inner drain holes 33 is not a round hole as in the conventional one but a slit-shaped one, it can be used by slightly devising a conventional mold as shown in FIGS. It can be opened, and does not generate "burrs" around it as in the case of a round hole.

Therefore, the drainage mass 1 according to the first aspect of the present invention.
At 00, when molding using synthetic resin as a material,
In particular, the inner drainage port 33 of the inner basket 30 can be made complete without burrs, and even if it is thin, it can be free from deformation due to shrinkage. In addition, since each inner drainage port 33 has a slit shape, a “round hole”
Unlike the above, it is possible to prevent the drainage function of the inner basket 30 from being completely impaired without being completely blocked by fallen leaves or paper debris.

Further, in order to solve the above-mentioned problem, the means adopted by the invention according to claim 2 is the same as the method of claim 1, wherein the drainage mass 100 of the above-mentioned claim 1 is described as follows. The clogging prevention part 34 is integrally formed near the inside. "

That is, the drainage mass 10 according to claim 2
In FIG. 5, especially the inner basket 30 is provided near the inner drain port 33 as shown in FIG.
However, the clogging prevention part 34 is
It may be a "ridge" as shown in FIG. 5, or a groove as shown in FIG. 7, for example.

As shown in FIG. 7, for example, as shown in FIG. 7, when the fallen leaves and paper debris try to close the inner drain port 33, the clogging preventing section 34 forms a gap below the inner drain port 33. Thus, the drainage function of each inner drainage port 33 is maintained.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, each of the inventions constructed as described above will be described with reference to a drainage mass 100 according to an embodiment shown in the drawings.
FIG. 1 or FIG. 2 shows a front view of the drainage mass 100 according to the present invention, in which the left half is sectioned. The drainage mass 100 conforms to legal standards. A mass main body 10, an outer basket 20 integrally formed of synthetic resin to be connected to a lower end of the mass main body 10, and an inner cage 30 that is inserted into and out of the upper end opening 13 of the mass main body 10 in the outer cage 20 are provided. Things. The drainage cell 100 shown in FIG. 1 is a “rainwater infiltration cell”, and FIG.
Is a "rainwater trout", but in the following description, the drainage trout 100 which is the rainwater permeation mass of FIG. 1 will be mainly described. .

The mass main body 10 is connected to the lower end of the drainage of a rain gutter (not shown), or connected at the intersection of or in the middle of a rainwater drainage groove, and has a plurality of drainage connection ports 11 for making this connection. It was done. The mass body 10 has an outer basket connection port 12 formed at the lower center thereof.
At the upper end, an upper end opening 13 having the same axis as the outer car connection port 12 is provided.
The upper end opening 13 is closed by a mass lid (not shown).

As shown in FIG. 1 or FIG. 2, the outer basket 20 has a fitting portion that fits into the drain connection port 11 on the mass body 10 side. In the same manner as the cage 30, it is integrally formed by injection molding using a synthetic resin as a material.

The outer basket 20 shown in FIG. 1 has a large number of outer drain holes 21 formed on the side wall thereof in order to make the drainage mass 100 a "rainwater infiltration mass". These outer drain holes 21 are for permeating the rainwater received by the outer cage 20 into the ground. On the other hand, in the outer basket 20 shown in FIG. 2, in order to make the drainage trout 100 a “rainwater trout”, a simple connection port 22 is provided without providing an outer drainage ditch on a side wall thereof. There are things. The connection port 22 of the outer cage 20 is to be connected to a drainage groove (not shown) via a connection pipe 24. When not used, the connection port 22 is closed by a water stop cap 23 shown in FIG. It is something that is set aside.

As described above, in the outer basket 20 as the “rainwater trough” shown in FIG. 2, the connection pipe 24 of the connection port 22 is connected. May not be connected to the side wall of the outer cage 20 in an orthogonal state. In consideration of such a situation, in the outer cage 20 of the embodiment of FIG. 2, the connecting pipe 24 can be connected obliquely to the side wall of the outer cage 20 and furthermore, it is necessary to prevent water leakage. The “neck” is the connection port 22
It is formed inside.

Now, regarding the inner basket 30, this inner basket 3
Numeral 0 denotes an integrated molding of a synthetic resin as a material by a molding die 40 as shown in FIGS. The inner basket 30 is housed in the outer basket 20 as shown in FIG. 1 or FIG. 2, and has a “flower pot” shape so as to be able to do so.

That is, the inner basket 30 has a side wall composed of an upper side wall 31a occupying about 1/3 of the total height and a lower side wall 31b connected to the upper side wall 31b via a step portion 32. Is connected to a bottom surface 35 placed on the inner bottom surface of the outer cage 20 via a thread end. The step portion 32 becomes substantially horizontal when the drainage mass 100 is buried in the soil, and has a function of increasing the rigidity of the inner basket 30. This also prevents sticking when stacking the inner baskets 30. A large number of slit-shaped inner drain holes 33 having an upper end opening in the step portion 32 are formed in the lower side wall 31b, and the lower end of each of the inner drain holes 33 extends to substantially the center of the lower side wall 31b. ing. Note that the inner basket 30 of the present embodiment is
In FIG. 6, as shown in FIGS. 6 and 7, a large number of drain holes 36 are also formed on the bottom surface 35.

As described above, each inner drainage port 33 is formed by the mold 40 shown in FIGS.
It is formed at the same time as molding.

That is, the molding die 40 is composed of a fixed die 41 and a movable die 42. These fixed die 41 and the movable die 42 are, as shown in an enlarged manner in FIG. The side step 41a and the fixed side surface 41b, and the drain step 42a and the opening step 42b are partially formed so as to correspond to the respective inner drain ports 33, respectively. Movable type 4
When the mold 2 is clamped to the fixed mold 41, the movable mold 42
Of each fixed side step 4 of the fixed mold 41
1a without any gap, and at the same time, each opening step 42b of the movable mold 42 abuts on each fixed side surface 41b of the fixed mold 41 without any gap. As a result, a portion into which the synthetic resin does not flow is formed, so that the lower side wall 31b and the step portion 32 are formed by the resin injected into other cavities.
Is formed, it becomes the above-mentioned inner drain port 33.

Therefore, each of the slit-shaped inner drain outlets 33
By using the mold 40 having the above-described structure, injection molding by a conventional method is sufficiently possible. Even if the lower side wall 31b on which the mold is formed is thin, a " It can be formed without generating burrs. The thin lower side wall 31b on which the inner drainage holes 33 are formed does not cause shrinkage deformation.

In the inner basket 30 of the embodiment shown in FIG. 5, a clogging preventing portion 34 extending downward along the inner drainage port 33 is integrally provided immediately near the inner drainage port 33 formed as described above. It is formed in. This inside drain 3
3 is provided on the inner surface side of the lower side wall 31b shown in FIG. 5 or the bottom surface 35 shown in FIG.
Although it may be a ridge like the one formed above, FIG.
May be provided on the bottom surface 35 side as shown in FIG.
This is because the presence of the clogging prevention portion 34 is to prevent the inner drainage port 33 and the drainage port 36 from being blocked by fallen leaves and paper debris as shown in FIG. .

[0031]

As described in detail above, first, in the invention according to the first aspect, as exemplified in the above embodiment, the inner basket 30 has the annular step portion 32 in the upper portion, Each inner drainage port 33 of the inner cage 30 has a structural feature in that the upper end is opened in the annular stepped portion 32 and the lower end is formed in a slit shape which is located substantially in the center of the inner cage 30. Therefore, when injection molding a synthetic resin as a material, it is possible to use the molding die which has been conventionally used with a little devising, and to mold without forming burrs even if the side surface is thin. It is possible to provide a drainage mass 100 with a simple configuration that can be manufactured and has no side wall deformation due to shrinkage immediately after molding and does not impair its function.

That is, the drainage mass 10 according to claim 1
According to No. 0, in particular, when the inner cage 30 is injection-molded using a synthetic resin as a material, each inner drain port 33 required for drainage is formed by using an existing molding device, and
Can be easily formed without impairing the required functions at all, and cleaning and maintenance need not be performed frequently.

According to the second aspect of the present invention, the clogging prevention portion 34 is formed integrally with the drainage mass 100 of the first aspect in the vicinity of the inside of each inner drainage port 33 of the inner basket 30. In addition, there is a feature in its configuration, whereby the same effect as that of the first aspect of the present invention can be obtained, and of course, the drainage mass which does not easily become clogged by paper dust and fallen leaves. 100 can be provided.

Further, the drainage cell 100 of the present invention can be applied whether it is a "rainwater cell" or a "rainwater infiltration cell".

[Brief description of the drawings]

FIG. 1 is a front view in which a left half is sectioned when applied to a rainwater-penetrating mass of a drainage mass according to the present invention.

FIG. 2 is a front view in which a left half is sectioned when the drainage trough according to the present invention is applied to rainwater trout.

FIG. 3 is a partial cross-sectional view of a forming die for manufacturing the drainage mass.

FIG. 4 is an enlarged partial sectional view showing a main part of FIG. 3;

FIG. 5 is a partially cutaway perspective view showing the inner basket in the case where a clogging prevention portion is formed near an inner drain port.

6 is a partially enlarged sectional view of a bottom surface of the inner cage shown in FIG.

FIG. 7 is a partially enlarged cross-sectional view showing another embodiment of the bottom surface.

FIG. 8 is a front view showing a left half of a conventional drainage cell in section.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Drainage mass 10 Mass body 20 Outer basket 21 Outer drainage port 22 Connection port 30 Inner basket 31a Upper side wall 31b Lower side wall 32 Step portion 33 Inner drainage port 34 Clogging prevention part 35 Bottom surface 36 Drainage port 40 Mold 41 Fixed mold 41a Fixed side step part 41b Fixed side surface 42 Movable type 42a Step part for drainage 42b Step part for opening

Claims (2)

[Claims] 1. A mass body connected to a drain for rainwater, an outer cage attached to a lower end of the mass body, and an inner drainage housed in the outer cage and formed on a side surface or the like. In a drainage trough provided with an inner basket for straining garbage and the like, the inner basket has an annular step in an upper portion, and each inner drain port of the inner basket has an upper end formed in the annular step. A drain opening having a slit-like shape with an opening at the bottom and a lower end located on a side wall of the inner cage. 2. The drainage mass according to claim 1, wherein a clogging preventing portion is integrally formed near the inside of each inner drainage port of the inner cage.