JP2001055769A - Drain for green space - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make workability good and reduce the number of parts by providing a through hole corresponding to the female screw hole of a drain body on the suppression piece of a waterproof layer formed on the bottom part of a protection cover, inserting a tightening bolt in the through hole to be screwed in the female screw hole of the drain body, and tightening the protection cover on the drain body. SOLUTION: A drain body 2 has a plurality of female screw holes 3 in a flange part 4, a plurality of suppression pieces 8 having a cross section shape corresponding to the flange part 4 of the drain body 2 are provided on the bottom part of a cylindrical protection cover 5, and through holes 9 corresponding to the female screw holes of the flange part 4. The suppression pieces 8 of the protection cover 5 is covered on the flange part 4 of the drain body 2, tightening bolts 10 are inserted from the through holes 9 to be screwed in the female screw hole 3 of the drain body 2, and the protection cover 5 is tightened on the drain body 2. Thereby tightening of the drain body 2 and the protection cover 5 is enabled without providing the waterproof suppression as a separate body and without needing a stop screw. Thus, the labor saving in constructing work and the reduction of the number of parts are contrived.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain for green tracts used for providing green tracts on a concrete slab.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication Nos. Hei 4-267363 and Hei 7-127 show drains used when a green space is provided on a concrete slab such as a rooftop and a tree is planted on the green space to form a garden.
195 and Japanese Utility Model Laid-Open No. 6-74668 are known.

[0003] In these known techniques, as shown in Fig. 3, after a drain body D is buried in a concrete slab C, a waterproof sheet S is laid on a flange portion F of the drain body D, and a drain sheet S is laid thereon. After the waterproof layer retainer P is placed, the waterproof layer retainer P and the drain body D are fastened with the fastening bolts B. The protective cover H is put on the cylindrical flange f provided on the outer peripheral edge of the waterproof layer retainer P, and is fastened with the set screw T. In Japanese Unexamined Utility Model Publication No. 6-74668, the waterproof layer retainer and the protective cover (partition cylinder) are provided with locking portions, and the locking portions are locked and fastened. (Not shown)

[0004] However, in these prior arts, since the waterproof layer retainer and the protective cover are separate bodies, they are attached at the site of the application as described above. Therefore, it takes a lot of time for the construction, and there is a high possibility that the set screws and nuts for fastening are lost.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drain for a green area which can reduce the number of parts and does not require much work in order to solve the above-mentioned problems of the prior art.

[0006]

In order to achieve the above object, a drain for a green area according to the present invention is provided with a pressing piece of a waterproof layer formed on the bottom of a protective cover, and this pressing piece is attached to a flange of a drain body. A through hole corresponding to the provided female screw hole is provided, and fastening can be performed with a fastening bolt.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a drain for green space according to the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of a drain for green space according to the present invention. 1 is a drain for green space. Reference numeral 2 denotes a drain body, which has a plurality of female screw holes 3 in a flange 4. 5
Is a cylindrical protective cover having a plurality of through holes 7 in a peripheral wall 6 thereof. A plurality of pressing pieces 8 having a sectional shape corresponding to the flange 4 of the drain body 2 are provided outward from the bottom of the protective cover 5, and the holding pieces 8 are provided on the flange 4 of the drain body 2. A through hole 9 is provided corresponding to the female screw hole 3. The holding piece 8 may be formed in a flange shape whose diameter is increased outward from the bottom of the protective cover.

FIG. 2 shows a second embodiment of a drain for green space according to the present invention. In the present embodiment, a holding piece 8 is provided which faces inward from the bottom of the protective cover 5.

Next, the function and effect of the drainage for green area according to the present invention will be described. In FIGS. 1 and 2, a waterproof sheet S is laid on a flange 4 of a drain body 2 previously embedded in a concrete slab C. Mesh strainer 12
Is placed on the opening step 11 of the drain body 2. In the second embodiment of the present invention shown in FIG. 2, a plurality of protrusions 14 project from the lower inner periphery of the protection cover 5 toward the axis of the protection cover 5, and the same as the strainer 12 on the protrusions 14. The strainer 15 was placed.

Next, the pressing piece 8 of the protective cover 5 is put on the flange 4 of the drain main body 2, a fastening bolt 10 is inserted through the through hole 9, and the protective cover 5 is screwed into the female screw hole 3 of the drain main body 2. Fastening to the drain body 2 with the waterproof sheet S interposed. A cover 13 having a plurality of through holes 13 a is provided at an upper opening of the protective cover 5.
3b is placed on the inside of the upper opening of the protective cover 5.

Then, garden soil is put on the concrete slab C and planted.

[0012]

As described above in detail, the drain for green tract of the present invention is provided with a pressing member of a waterproof layer at the bottom of the protective cover constituting the drain, and a female screw provided on the drain member flange at the pressing member. A through hole corresponding to the hole is provided, and the drain body and the protective cover can be fastened by a fastening bolt. Therefore, unlike the conventional case, there is no need to separately provide the waterproof layer retainer, and since a stop screw is not required, labor saving in the implementation and prevention of loss of the parts can be achieved, and a practically excellent effect is exhibited.

[Brief description of the drawings]

FIG. 1 is a central longitudinal cross-sectional view showing a state in which a first embodiment of a green space drain according to the present invention is applied.

FIG. 2 is a vertical sectional view of a main part of a green area drain according to a second embodiment of the present invention, showing a state where the drain is in operation;

FIG. 3 is a central longitudinal sectional view of a main part showing a state of operation of a conventional one.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Drain for green areas 2 Drain main body 3 Female screw hole 4 Flange part 5 Protective cover 8 Holding piece 9 Through hole 10 Fastening bolt C Concrete slab S Waterproof sheet

Claims (1)

[Claims] 1. A drain body (2) having a female screw hole (3) in a flange (4) and a cylindrical protective cover (5) having a plurality of through holes (7) in a peripheral wall (6). Forming a pressing piece (8) of a waterproof layer (S) on the bottom of the protective cover (5);
The holding piece (8) is provided with a through-hole (9) corresponding to the female screw hole (3) of the drain body (2), and a fastening bolt (10) is inserted into the through-hole (9). A green drain formed by screwing the protective cover (5) into the female screw hole (3) of the main body (2) and fastening the protective cover (5) to the drain main body (2).