JPH0745637Y2 - Filters for drainage pipes on retaining walls - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention has a leg portion which is fitted into a base end opening of a drainage pipe embedded in a retaining wall constructed for earth retaining purposes so that earth and sand can flow out through the drainage pipe. The present invention relates to a filter for a drainage pipe of a retaining wall that prevents the above by a filter plate.

[0002]

2. Description of the Related Art As a conventional water drain pipe filter for this kind of retaining wall, a plastic drain plate having a leg tube portion for fitting the water drain pipe, which has a slightly smaller diameter than that, is usually used. However, there are two types of drainage pipes, which are commonly referred to as VP pipes and VU pipes with the same outer diameter but different inner diameters depending on the wall thickness. Therefore, it is necessary to manufacture two types of products in which the outer diameter dimension of the leg cylinder portion is different according to the inner diameter of the drainage pipe, which causes a cost increase. In addition, when the end face of the drainage pipe is cut diagonally according to the inclination of the retaining wall, the cut end becomes an ellipse, so the fitting is insufficient with the leg cylinder part of a constant outer diameter, and There was a problem that the cut end of the drainage pipe did not come into close contact and a gap was created, or the filter for the drainage pipe fell off.

Therefore, by disposing a plurality of thin elastic plate pieces whose middle portions are bent outwardly on the back surface of the shielding plate, it is possible to eliminate the difference in the inner diameter of the drainage pipe and the elliptical cut-out. The filter for the water draining pipe that absorbs the poor fitting by the elastic plate piece that elastically deforms
Although it has been proposed by Japanese Patent Publication No. 9044, it is easily deformed, which causes a problem that the filter for the drainage pipe falls into the drainage pipe due to earth pressure.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and ensures reliable drainage of a drainage pipe having a different inner diameter or an elliptical cutout. It is an object of the present invention to provide a filter for a drainage pipe having a retaining wall, which can be fitted and locked in the drainage pipe and which does not fall into the drainage pipe due to earth pressure.

[0005]

A filter for a drainage pipe of a retaining wall according to the present invention which solves the above problems,
In the filter for the drain pipe of the retaining wall made of a hard synthetic resin that is arranged in an annular shape so that the leg group is fitted to the base end opening of the drain pipe on the back surface of the filter plate, the leg group is A long pedestal piece formed on a wedge-shaped locking head having an outer inclined surface, and a short pedestal piece having a tip disposed at a position facing the long pedestal piece on a wedge-shaped locking head having an outer inclined surface. When,
Between the long pedestal piece and the short pedestal piece, the required number of the short pedestal one side is sequentially shortened as compared with the one on the long pedestal one side, and the required number of tips are wedge-shaped locking heads with an outer surface inclination It is characterized in that it is configured by the formed intermediate long pedestal piece.

[0006]

In the filter for draining pipe having such a habit, a leg piece consisting of a long pedestal piece, a short pedestal piece and an intermediate long pedestal piece formed in a wedge-shaped locking head having an inclined outer surface at the tip. If the group is forcibly fitted to the vertical cut end of the drainage pipe, even if there is a slight difference in the inner diameter of the drainage pipe, the long and short pedestal pieces and the intermediate length are attached to the inner surface of the water drainage pipe. The wedge-shaped locking heads having inclined outer surfaces of the pedestal pieces are elastically locked so that the filter plate is firmly attached to the cut end of the drainage pipe.

Further, the large number of elastic legs forming the leg group are not all of the same length, and the long and short pedestal pieces face each other and between the long and short pedestal pieces. Since the required number of intermediate long stilt pieces are arranged in an annular shape with the one on the short stilt one side being sequentially shorter than the one on the long stilt one side, the long stilt pieces, the short stilt pieces and the intermediate long stilts are arranged. The end surface of one leg has an elliptical shape that is almost the same as the cut end of the drainage pipe, and therefore, even if the drainage pipe is cut diagonally due to the inclination of the retaining wall and the cut-out opening is elliptical, the short leg is above the cut end. If the pillar pieces are fitted and the long-leg pillar pieces are fitted to the lower side, the wedge-shaped locking head outer surface of the long-leg pillar pieces, short-leg pillar pieces, and intermediate long-leg pillar pieces will be drained. The inner surface of the pipe can be surely contacted and an appropriate elastic locking state can be maintained.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. Reference numeral 1 denotes a filter plate in which a circular disc made of a hard synthetic resin is provided with mesh-shaped through holes 1a. On the back surface of the filter plate 1, eight pedestal pieces made of the same material are arranged at required intervals. Are arranged in a ring shape to form a leg group 2. In this leg piece group 2, one long pedestal piece 3 whose tip is formed on a wedge-shaped locking head 3a having an inclined outer surface, and a tip arranged at a position opposite to the long pedestal piece 3 is an outer surface. Compared to one short pedestal piece 4 formed on the inclined wedge-shaped locking head 4a and three long pedestal pieces 3 between the long pedestal piece 3 and the short pedestal piece 4 respectively. The short-leg column one side is sequentially shortened, and the required number of the tips are arranged by an intermediate long-leg column piece 5 formed on a wedge-shaped locking head 5a having an inclined outer surface. The lines connecting the leading ends of the long-leg pillar pieces 3, the short-leg pillar pieces 4 and the intermediate long-leg pillar pieces 5 that are formed are arranged in an annular shape so as to have an elliptical shape. In addition, reference numeral 7 in the drawing denotes a reinforcing portion that connects the base portions of the leg pieces 2 to each other.

With this construction, the long pedestal piece 3 and the short pedestal piece 4 and the intermediate long pedestal piece 5 are formed on the wedge-shaped locking heads 3a, 4a, 5a having the outer ends inclined. If the leg group 2 consisting of the leg group 2 is forcibly fitted to the vertical cut 23 of the drainage pipe 22 embedded in the retaining wall 21,
The wedge-shaped locking heads 3a, 4a, 5a having an inclined outer surface formed at the tips of the long pedestal piece 3, the short pedestal piece 4 and the intermediate long pedestal piece 5 are Since the inner surface is elastically contacted at right angles to be locked, the drain pipe P
In both the VP pipe and the VU pipe having different inner diameters, the filter plate is securely locked to the cut end of the drainage pipe by elasticity.

Further, as shown in FIG. 3, even when the base end of the drainage pipe 22 is an elliptical cut 24 which is cut obliquely according to the inclination of the retaining wall 21, By aligning the long pedestal piece 3 on the lower side and the short pedestal piece 4 on the upper side and forcibly fitting the leg piece group 2 to the draining pipe 22, the leg piece group 2 is moved as described above. The lengths of the long sill piece 3, the short sill piece 4, and the intermediate long stilt piece 5 that are configured are as follows: Since the ones on one side of the short pedestal are sequentially made shorter than those on the one side of the long pedestal so as to have an oval shape, the required number of them are arranged to correspond to the oval cut-out 24 of the drainage pipe 22. Wedge-shaped locking heads 3a, 4a having inclined outer surfaces of the long pedestal piece 3, the short pedestal piece 4, and the intermediate long pedestal piece 5, respectively.
5a is a draining pipe 22 as in the case of vertical cut
The inner surface of the member is securely contacted and elastically locked.

After the filter plate 1 is securely attached to the cut end 23 or 24 of the draining pipe 22 in this way, a back-filling crushed stone for preventing clogging is put on the cliff side of the retaining wall 21 to further remove the cliff. The work is completed by filling the soil with the back-filled cobblestone. Then, the leachate generated by rain or the like is blocked by the retaining wall 21 through the back-filling stones, and the retaining wall 21 has a draining pipe 22 in which the filter plate 1 is attached to the base end edge thereof. Therefore, only the water from which the sand and sand have been sieved passes through the circular filter plate 1 and flows into the draining pipe 22, and is drained to the outside through this draining pipe 22.

[0012]

As is apparent from the above description, the present invention provides a long pedestal piece formed on a rear surface of a filter plate with a wedge-shaped locking head having an inclined outer surface, and an opposing position of the long pedestal piece. A short pedestal piece formed on a wedge-shaped locking head having an inclined outer surface, and a short pedestal between the long pedestal piece and the short pedestal piece compared to the one on the long pedestal side. At the base end opening of the drainage pipe, a group of leg pieces composed of a middle long pedestal piece with a wedge-shaped locking head with an inclined outer surface with the required number of one side being sequentially shortened Since they are arranged in an annular shape so that they can be fitted, one-touch operation is possible even for drainage pipes with different inner diameters or elliptical cuts. Items that can be attached without leaving a gap or falling A. Therefore, the present invention is of great practical value as a filter for a draining pipe of a retaining wall that solves the conventional problems.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view showing an embodiment of the present invention.

FIG. 3 is a side view showing a usage state of the present invention.

[Explanation of symbols]

 1 Filter plate 2 Leg piece group 3 Long pedestal piece 4 Short pedestal piece 5 Intermediate long pedestal piece 3a Externally inclined wedge-shaped locking head 4a Externally inclined wedge-shaped locking head 5a Externally inclined wedge-shaped engagement Stop head

Claims (1)

[Scope of utility model registration request] 1. A retaining wall drainage pipe made of hard synthetic resin in which a leg piece group (2) is annularly arranged on the back surface of a filter plate (1) so as to be forcibly fitted into the base end opening of the drainage pipe. In the filter for foot, the leg group (2) includes a long pedestal piece (3) whose tip is formed into a wedge-shaped locking head (3a) having an inclined outer surface,
A short pedestal piece (4) having a wedge-shaped locking head (4a) whose outer end is disposed at the end opposite to the long pedestal piece (3),
Between the long pedestal piece (3) and the short pedestal piece (4), the ones on the one side of the short pedestal are sequentially shortened as compared with those on the one side of the long pedestal, and the required number of tips are arranged with a wedge with an outer slope. A filter for a drainage pipe of a retaining wall, which is configured by an intermediate long pedestal piece (5) formed on a shape locking head (5a).