JP2002171827A - Roof structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof structure capable of efficiently retaining water in a planting part for a long period. SOLUTION: This roof structure has a planting part S in which soil 1 having a prescribed thickness is piled on an inclined roof B2 on which a waterproof layer 4 is provided. In the roof structure, a water-retaining part 2 made of a water-absorbing polymer and capable of freely retaining water is provided in the planting part S along the upper part of the waterproof layer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof structure in which a planting section in which soil is laminated to a predetermined thickness is provided on an inclined roof provided with a waterproof layer.

[0002]

2. Description of the Related Art Conventionally, as a roof structure of this type, FIG.
As shown in FIG. 1, the planting part S is formed by directly laminating the soil 1 on the waterproof layer 4 of the roof B2 inclined at a predetermined angle, or as shown in FIG. Reservoir 20 formed with a large number of free concave portions 20a opened upward
And a water reservoir 22 formed by stacking a filter layer 21 for preventing the inflow of soil 1 on the opening is provided on the waterproof layer 4, and the soil 1 is stacked thereon to form the planting section S. (See, for example, JP-A-11-32579)
was there.

[0003]

According to the former one of the above-mentioned conventional roof structures, water that has penetrated into the planting part due to watering into the planting part or permeation of rainwater, etc., has a roof slope. It flows down along and it is difficult to stay in the planting area for a long time. As a result, there is a problem that water shortage is likely to occur in the plants growing in the planting section. Therefore, it is necessary to increase the number of times of watering and increase the amount of water to be used. In addition, according to the latter of the conventional roof structures described above, according to the latter, since the water that has entered the planting section accumulates in the concave portion of the water storage section, the water in the planting section is smaller than the conventional technique described above. Although it has a retaining effect, the roof itself is sloping,
The water storage portion is also in an inclined state, and a space remains near the opening of the concave portion, and water cannot be stored up to the full concave portion. Therefore, there is a problem that the water storage efficiency is poor, and in order to store sufficient water, it is necessary to increase the thickness dimension of the water storage portion and substantially increase the volume of the concave portion. The whole is higher than necessary,
There is a problem that aesthetics are easily damaged.

[0004] Accordingly, it is an object of the present invention to provide a roof structure that solves the above-mentioned problems and that efficiently retains water for a long time in a planting part.

[0005]

The feature of the first aspect of the present invention is that, as shown in FIGS. 2, 9 and 10, the soil 1 is laminated to a predetermined thickness on an inclined roof B2 provided with a waterproof layer 4. In the roof structure having the planted portion S provided therein, a water retaining portion 2 made of a water-absorbing polymer capable of retaining water in the planted portion S is provided along the waterproof layer 4. .

According to the characteristic structure of the first aspect of the present invention, the water retaining portion made of a water-absorbing polymer capable of retaining water in the planting portion is provided along the waterproof layer. The intruded water, after reaching the waterproof layer, moves to the downstream side along the roof slope.However, since the water retaining section made of the water-absorbing polymer is located on the moving path, more water is infiltrated. Water can be efficiently contacted, and in that contact state, water can be taken into the water retention unit and retained. And, the water retention to the water retention part, exhibits high water absorption and stable water retention by the water absorbing polymer, without wasting more water,
And it becomes possible to hold water for a long time.
As a result, when the roots of the plants growing in the planting section need water, it is possible to absorb the water from the water retaining section even if the soil has little water, and it is difficult for the planting section to be in a drought state. Becomes possible. In other words, it becomes possible to provide a planting part where the vegetation is hard to wither.

A feature of the invention according to claim 2 is that, as illustrated in FIGS. 2 and 3, the water retaining section 2 is formed in a mat shape.

According to the characteristic structure of the second aspect of the present invention, in addition to the function and effect of the first aspect of the present invention, since the water retaining portion is formed in a mat shape, it is laid on the waterproof layer. Before carrying out, it is possible to fold or take up the product in a compact form, and it is possible to improve the handling property, so that the workability of storing and carrying in the material can be improved. Also, according to this good handling,
Regarding the laying work of the mat-shaped water retention section, the work efficiency can be similarly improved.

A feature of the invention according to claim 3 is that the water retaining section 2 is formed by entanglement of fibers of a water-absorbing polymer.

According to the characteristic structure of the third aspect of the present invention, in addition to the effect of the first or second aspect of the present invention, water can be provided in the gap between the water-absorbing polymer fibers by utilizing the capillary phenomenon. And water can be absorbed by the water-absorbing polymer in a state where water is taken into the gap.
Therefore, even if the drainage of the soil is good, it is possible to efficiently absorb the water passing through the planting part and to retain the water without waste. Also, by making the water-absorbing polymer into a fibrous shape, for example, compared to a water-absorbing polymer formed into a plate shape,
The surface area can be greatly increased, and the water absorption efficiency can be improved by increasing the contact area with water.

As shown in FIGS. 2 and 3, the water retaining portion 2 is formed by integrating a water retaining main body 2A and an adhesive portion 2B to the waterproof layer 4 in a laminated state. The bonding portion 2B is made of the same material as the waterproof sheet of the waterproof layer 4.

According to the fourth aspect of the present invention, in addition to the effects of any one of the first to third aspects of the present invention, the bonding portion is formed of the same material as the waterproof sheet. Therefore, when the water retaining portion is adhered to the waterproof layer, the water retaining portions are well compatible with each other and can be strongly adhered even by an adhesion method such as welding or fusion.

As described above, the reference numerals are used for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions.

FIG. 1 shows a building B provided with one embodiment of the roof structure of the present invention. The building B of the present embodiment includes a building body B1 and a roof B2 formed thereon.
This is a reinforced concrete building that is integrally constructed with.

The roof B2 is, as shown in FIGS.
When viewed from a position distant from the building B, the upper surface portion (a planting portion to be described later) is inclined so that it can be seen. On the roof B2, a planting section S in which the soil 1 is put is provided, and the plants growing in the planting section S can be viewed at a position away from the building B.

Then, on the top surface of the roof B2, FIG.
As shown in 5, a waterproof sheet (corresponding to a waterproof layer) 4 made of vinyl chloride is adhered and fixed, and further thereon, a water retaining mat (water retaining section) capable of retaining water in the planting section S 2) is provided so as to overlap the waterproof layer. Above the water retention mat 2, a soil supporting net 5 is supported by a plurality of support members 3 fixed to project on the upper surface of the waterproof sheet 4. It is possible to carry the soil 1 and to prevent slippage.

Incidentally, the waterproof sheet 4 is attached and fixed to a waterproof sheet fixing bracket 6 fixed to the roof B2 by bonding. Adjacent sheets are reliably integrated by welding. Regarding the material of the waterproof sheet 4, since vinyl chloride is used,
An appropriate strength can be ensured, and the effect of preventing the soil 1 from shifting can be enhanced, and the root of the planting portion S can be prevented from penetrating. In addition, regarding the waterproof sheet fixing bracket 6,
For example, as shown in FIG. 4, a washer body 6A in which a hot-melt adhesive layer H made of a thermoplastic synthetic resin that melts and exhibits adhesiveness such as a polyester resin is coated on the upper surface of a stainless steel disk having a diameter of about 50 mm. It is composed. The washer body 6A is disposed on the roof B2 at predetermined positions in the vertical and horizontal directions and is screwed. The waterproof sheet 4 is fixed to the roof B2 by setting an electromagnetic induction heating device above a portion of the waterproof sheet 4 covered on the washer body 6A and heating the washer body 6A by electromagnetic induction. By melting the adhesive layer H, the washer body 6A and the waterproof sheet 4 can be bonded (see FIG. 5).

The water retention mat 2 is constructed by integrally integrating a mat body (corresponding to a water retention body) 2A formed into a mat by entanglement of fibers made of a water-absorbing polymer, and an adhesive portion 2B to the waterproof sheet 4. is there. The fiber material constituting the mat body 2A can be made of, for example, a water-absorbing polymer such as starch, cellulose, and synthetic polymer. Incidentally, the starch-based and the cellulose-based,
There are a graft polymerization system and a carboxymethylation system, respectively, and the synthetic polymer system includes various types such as polyacrylate, polyvinyl alcohol, polyacrylamide, and polyoxyethylene. The bonding portion 2B is formed of an adhesive sheet containing vinyl chloride as a main component, and the water retention mat 2 is bonded to the waterproof sheet 4 by applying a solvent, abutting against the waterproof sheet 4 and pressing. be able to. Further, since both the bonding portion 2B and the waterproof sheet 4 are mainly composed of vinyl chloride, when they are welded by the solvent, they are well adapted to each other and can be strongly bonded. However, the mounting portion of the support member 3 to the waterproof sheet 4 is arranged so as to cover the base portion 3a of the support member 3 as shown in FIG. And
A main body portion 3b of the support member 3 penetrates the water retention mat 2 and protrudes upward. Since the water retention mat 2 is adhered along the waterproof sheet 4, the water that has entered the planting part S is caused to flow down the waterproof sheet 4 along the roof gradient toward the lower side of the waterproof sheet 4. In the water retention mat 2, water is sufficiently retained. Therefore, when the soil 1 dries, the water retained in the water retention mat 2 is supplied to the plants and trees of the planting section S, and it is possible to reduce the drought condition.

The support member 3 is formed of vinyl chloride, and includes a base portion 3a and a main body portion 3b as shown in FIG. The base part 3a
Is constituted by a disc, and the main body portion 3b is constituted by a resin bolt provided integrally and in an upright state at a central portion of the disc. And the support member 3
The main body portion 3b is installed in a state of protruding above the roof surface by surface bonding the disc-shaped base portion 3a onto the waterproof sheet 4. The main body 3b is provided with a pair of detachable locking ring members 3c which can be locked to the external thread portion of the outer peripheral portion. The supporting net 5 is provided between the locking ring members 3c. It can be pinched and fixed. Therefore, in a state where one locking ring member 3c is locked to the main body portion 3b, the net 5 is formed in a through hole (the soil 1 is configured to be able to pass through in the thickness direction of the planting portion S) 5b. The net 5 is placed on the one locking ring member 3c by inserting the main body portion 3b, and while the other locking ring member 3c is subsequently locked on the main body portion 3b,
The net 5 can be supported and fixed by the support member 3 by sandwiching the net 5 between both locking ring members 3c. Further, the locking ring member 3c will be described. Similar to the base portion 3a and the main body portion 3b, the locking ring member 3c is made of a synthetic resin. As shown in FIG. The locking piece 7a is integrally provided. Each of the locking pieces 7a is formed so as to be inclined to one side with respect to the ring axis, and the locking ring member 3 is formed from one end of the main body portion 3b made of the resin bolt.
When c is fitted along the bolt axis, each of the locking pieces 7a is in a state in which it is easily bent, and can be easily fitted. Is
The locking piece 7a is configured so as to be difficult to pull out. Incidentally, the locking ring member 3c to the main body portion 3b
The locking action of the locking piece 7 is provided on the outer male screw portion of the main body portion 3b.
This is effective when the distal end of a is engaged. Also,
To remove the locking ring member 3c from the main body 3b,
This operation is performed by performing the same operation as removing the nut from the bolt (rotating the locking ring member 3c around the bolt axis along the male screw portion). Also, the main body part 3b
Can be changed, the supporting height of the net 5 can also be changed. For example, the set thickness dimension of the soil layer of the planting portion S and The net 5 according to the type of vegetation to be grown.
Can be easily adjusted to a preferable value. The main body portion 3b and the locking ring member 3c are referred to as height changing means 8.

The net 5 will be described. As shown in FIG. 3, a plurality of vertical lines and a large number of horizontal lines intersect with each other. A space which is a net and is surrounded by an adjacent vertical line portion and an adjacent horizontal line portion is secured as the through hole 5b. This through hole 5b is set to a size that allows the soil 1 of the planting part S to penetrate, and the net 5 is supported on the roof B2 by the support members 3 as described above, and When the soil 1 is covered, it is considered that the soil 1 may pass under the net 5 through the through hole 5b. Therefore, after the net 5 is installed, even if the soil 1 is filled in the planting part S, the soil spreads over the water retention mat 2, and the soil 5 is buried in the soil by filling the soil 1 to a predetermined thickness. Becomes possible. As a result, it is possible for the net 5 to carry the soil 1 of the planting part S and prevent the soil from falling along the roof slope. In addition, regarding the prevention of displacement of the planting portion S, in addition to the use of the above-described carrying action of the net 5 and the soil 1, there is also a point of utilizing a natural phenomenon caused by the growth of plant roots. That is, the plants that grow have the property of extending the roots in the direction of moisture, and in the case of this embodiment,
The root existing in the soil above the net 5 is likely to grow toward the water retention mat 2. At this time, since each root has to pass through the through hole 5b of the net 5, a root entanglement effect on the net 5 can be expected as a result. It can be prevented.

Next, a method of forming a plant on the roof of the building will be described with reference to an example. [1] The waterproof sheet fixing bracket 6 is fixed to a predetermined location on the roof B2, and the waterproof sheet 4 is bonded and fixed thereon. [2] The support member 3 is bonded and fixed to a predetermined location on the upper surface of the waterproof sheet 4. [3] The water retention mat 2 is adhered on the waterproof sheet 4. However, the installation portion of the support member 3 is penetrated so that the main body portion 3b of the support member 3 projects upward. [4] The net 5 is arranged over each support member 3 and fixed by the locking ring member 3c. However, as shown in FIG. 8, the eaves-side end of the net 5 is wound up with a sufficient length. [5] The soil 1 is spread over the net 5 so that the net 5 is sufficiently raised to a predetermined height that fits in the soil (see FIG. 8B). [6] Put grass on the soil 1 and cover with sand (Fig. 8
(C)). [7] The net wound up at the end on the eave side is unrolled, folded back to the upper part of the soil, and the end is fixed with a hook-shaped stopper F or the like (see FIG. 8 (d)). By doing this,
The soil 5 and the grass at the eaves side edge of the planting part S can be wrapped in the net 5 and fall can be prevented, and the vegetation can appear on the eaves side edge side through the through hole 5b of the net. When the planting section S is looked up from the diagonally lower part of the building, it is possible to make the roof finish highly aesthetic so that the situation where the vegetation is growing up to the edge can be seen.

According to the roof structure described in the embodiment, since the water in the planting portion S can be held for a longer time by the water retention mat, it is difficult to fall into a drought state and the rainfall is small. Even if watering is delayed, it is possible to expect an effect that plants in the planting section S are hard to wither. Further, since the soil 5 of the planting part S can be supported by the net 5 and it is possible to suppress the flow of the soil at the planting part, the planting is performed up to the eaves edge of the planting part. It is possible to further improve the beauty of the roof wrapped by the planting part S by exposing it as a planting part.

[Another Embodiment] Another embodiment will be described below.

<1> The structure of the building is not limited to the reinforced concrete structure described in the above embodiment, and may be, for example, a steel structure, a steel reinforced concrete structure, or a wooden structure.
And a well-known building structure, such as a composite structure thereof, can be adopted. <2> Instead of the net 5, for example, a configuration in which a punching sheet, a nonwoven fabric, or the like is provided as a slip prevention member, or a configuration in which these are not provided may be used. <3> The waterproof layer 4 is not limited to the one configured using the vinyl chloride waterproof sheet described in the above embodiment, but may be a sheet made of rubber or TPE (Thermo Plastic Elastomer). Or, a waterproof sheet made of another material may be used. Furthermore, the present invention is not limited to a molded sheet, and a waterproof layer may be formed by applying a waterproof material, and these are collectively referred to as a waterproof layer. In this case, it is preferable that the bonding portion 2B of the water retention mat is also made of the same material as the waterproof layer 4. Further, fixing of the waterproof layer 4 to the roof B2 is performed by the waterproof sheet fixing bracket 6 described in the above embodiment,
For example, the present invention may be implemented by bonding the entire surface to the roof B2. <4> The bonding section 2B is not limited to the bonding sheet mainly composed of vinyl chloride described in the above embodiment, but may be formed of a different material as described above. Is also good. Also, apply a solvent to the waterproof sheet 4
In addition, for example, it may be made of an adhesive material. In this case, the surface of the adhesive portion 2B is covered with a release paper, and at the time of construction, the release paper is removed and exposed. Adhesion can be performed by a simple operation in which the adhesive surface is brought into contact with the waterproof sheet 4 and pressed. <5> The water retaining section 2 is not limited to the one configured by the water retaining mat described in the above embodiment,
For example, as shown in FIG. 9, a water retention block protruding from the upper surface of the waterproof layer, or as shown in FIG. 10, a water retention net arranged along the upper surface of the waterproof layer may be used. In short, what is necessary is just to be able to hold the water in the planting part S,
These are collectively referred to as water retention units. Therefore, in addition to the configuration in which the fibrous body is entangled, the water retention unit may be configured by a granular material or the film may be configured by a film. <6> The plant grown in the planting section is not limited to the lawn as described in the above embodiment, and may be other plants. <7> The term "adhesion" used in the description of the above embodiment is not limited to the method of joining objects to be joined with an adhesive material interposed therebetween. T) including those that are integrally joined. Accordingly, adhesive bonding, solvent welding, heat fusion, and the like are collectively referred to as bonding.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a building.

FIG. 2 is a sectional view of a main part showing details of a roof.

FIG. 3 is a partially cutaway perspective view showing a mounting state of a net.

FIG. 4 is a perspective view showing a waterproof sheet fixing bracket.

FIG. 5 is a sectional view of a main part showing a fixing state of the waterproof sheet.

FIG. 6 is an exploded perspective view showing a support member.

FIG. 7 is a cross-sectional view showing a mounting state of a support member.

FIG. 8 is a perspective view showing a procedure for forming a plant.

FIG. 9 is a cross-sectional view illustrating the installation state of a water retention unit according to another embodiment.

FIG. 10 is a cross-sectional view illustrating the installation state of a water retention unit according to another embodiment.

FIG. 11 is a sectional view showing a conventional roof structure.

FIG. 12 is a sectional view showing a conventional roof structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Soil 2 Water retention part 3 Support member 4 Waterproof layer 5 Surface member 5a Supported part 5b Passing hole 8 Height changing means B2 Roof S Planting part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichi Arioka 4-1-1-13 Honcho, Chuo-ku, Osaka-shi, Osaka Inside the Takenaka Corporation Osaka Main Store (72) Inventor Hiroshi Takahashi 1-5 Otsuka, Inzai-shi, Chiba Address 1 Inside Takenaka Corporation Technical Research Institute (72) Inventor Takashi Miwa 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside 1 Takenaka Corporation Technical Research Center (72) Inventor Goro Nakano Eno, Suita-shi, Osaka 24-10 Kimachi Inside Akiya Made Co., Ltd. (72) Inventor Ryoichi Yamabe 24-10 Inside Akiya Made Co., Ltd., Osaka Prefecture (72) Inventor Soichi Yoshikawa 24, Enomachi, Suita City, Osaka Prefecture No. 10 AKIYA Made Co., Ltd. F term (reference) 2B022 AB04 BA02 BB01

Claims (4)

[Claims] 1. A roof structure in which a planting section in which soil is laminated to a predetermined thickness is provided on an inclined roof provided with a waterproof layer, wherein the planting section is provided along the waterproof layer. Roof structure with a water-absorbing polymer water retention section that can freely retain water inside. 2. The roof structure according to claim 1, wherein the water retaining section is formed in a mat shape. 3. The roof structure according to claim 1, wherein the water retaining portion is formed by entanglement of fibers of a water-absorbing polymer. 4. The water-retaining portion is formed by integrating a water-retaining body and a bonding portion to the waterproof layer in a laminated state, and the bonding portion is made of the same material as a waterproof sheet of the waterproof layer. The roof structure according to claim 1.