JP2012130340A - External heat-insulation greening member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an external heat-insulation greening member capable of considerably reducing maintenance cost in the case of covering a roof of a building with a creeping plant.SOLUTION: The external heat-insulation greening member is a closed cell expansion molded article which has an expansion ratio of 10-90 and is provided with root region securing parts and creeping stem developing parts on the upper face of the greening member. Adjacent root region securing parts are connected together through a root region securing part connecting groove, and vegetation base materials are filled in the root region securing parts, the root region securing part connecting grooves and the creeping stem developing parts. The depth of the root region securing part is 30-200 mm, the depth of the vegetation base material of the creeping stem developing part is 0-40 mm, and an S/Sratio is 0.5-40, wherein Sis the area of total root region securing parts consisting of the root region securing part and the root region securing part connecting groove and Sis the area of total creeping stem developing parts consisting of the creeping stem developing part, vegetation base guide protrusions and peripheral parts 10. The creeping plant is grown on the upper face of the external heat-insulation greening member filled with the vegetation base material.

Description

The present invention relates to an outer heat insulating greening member capable of greatly reducing maintenance when a roof of a building is covered with a vertical plant.

Building roofs are subject to high temperatures because they are exposed to direct sunlight for a long time during the day. In particular, in summertime when the solar radiation is long, the heat absorbed from the roof surface is transferred to the building to raise the room temperature, and heat storage due to the heat transferred from the roof surface to the building reduces the air conditioning efficiency. Is invited. Conventionally, as an effective method against such heat radiation, a method of shielding heat from the outside by applying a heat insulating material such as polyethylene foam, polystyrene foam, polyurethane foam, etc. to the roof and pressing it with concrete (pressing concrete) has been common. It was. However, with this method, the heat transfer is limited by the heat flow resistance of the heat insulating material, and the roof surface cannot be actively cooled. In addition, the pressing concrete layer absorbs solar heat and stores heat at high temperatures during the daytime, and the heat that leaks through the insulation is stored in the building housing, and heat is also generated inside the building even when there is no solar radiation such as at night or cloudy weather. As a result, the energy saving measures of the fundamental air conditioner were limited. In order to cope with such problems, so-called rooftop greening, in which plants are planted on the roof, has begun to spread. With regard to rooftop greening, it has a so-called heat removal effect that removes heat by the heat of vaporization caused by the transpiration of water from the leaf surface of the plant. In this way, the temperature of the roof surface can be reduced. In other words, it can be said that the animal uses a heat removal mechanism similar to that used to maintain body temperature by sweating. Therefore, it is very promising as a countermeasure against heat island.

  There are many technologies and products for rooftop greening, and plants such as sedum and moss are sometimes used to reduce maintenance costs. Many are said to be able to withstand dry conditions and not require irrigation, fertilization or trimming. However, sedum and moss itself have very low transpiration capacity, and furthermore, evaporative heat cooling cannot be performed without irrigation, so they are not suitable for energy saving and heat island countermeasures. Therefore, it is necessary to show the heat removal effect by coating with plant species with high transpiration ability. As a result, the conventional methods increase the labor and cost of maintenance such as irrigation, pruning, and fertilization. A method for realizing a significant reduction in maintenance cost while using a plant having a high transpiration capacity is awaited.

  One of the major causes that hinders the spread of rooftop greening is that it requires a lot of labor and cost for maintenance. The greening surface cannot be easily removed once it has been constructed, but how to achieve long-term stable greening while reducing maintenance is an important issue. In order to demonstrate the necessity of use including walking on the greening surface, aesthetics, and the cooling effect (heat shielding effect) due to water transpiration, ensuring a dense covering surface stably over the long term, Reducing maintenance significantly is an issue that has not yet been realized in the industry. Many other proposals have been made for lighter rooftop greening and lower initial investment. Urethane resin foam sheets, non-woven fabrics, thin inorganic perforated plates, and pallets with a thin base layer of about 50 to 100 mm are included. However, water retention and fertilization capacity is low, and frequent watering and fertilization is required. Because of the thin layer, the stems and roots are too dense in the vegetation base layer, so-called root clogging phenomenon occurs, the generation of new stems and roots is hindered, and long-term stable growth is difficult. Damage to the waterproof layer due to roots due to lack of guts, or when using a molded body, the strength of the base (waterproof layer, etc.) and the adhesive or adhesive tape that fixes the molded body to the base is greatly reduced by the root However, the actual situation is that the wind pressure resistance is greatly reduced. In addition, the most difficult task is the significant reduction in maintenance.

  One of the most effective plants for heat island countermeasures is so-called cocoon-type plants such as turf where leaves with strong transpiration are densely formed on the construction surface. Since these plants represented by turf can walk on the green surface, they can be used not only as landscapes but also as open spaces, leading to an improvement in the asset value of buildings. However, in the case of rooftop greening, in addition to the weight of the plant and the vegetation base on which the plant is planted, the water retention weight of the vegetation base increases. is there. Therefore, a rooftop greening construction panel that can reduce the load on the rooftop has been developed, and several inventions and devices have been disclosed so far.

For example, Patent Document 1 discloses an invention named “a rooftop greening construction panel and a rooftop greening construction system using the rooftop greening construction panel”. With respect to Patent Literature 1, a planting base storage unit that stores a planting base material such as soil in the panel main body, and a planting base material storage unit that has a predetermined thickness in order to make the planting base material have a predetermined thickness. It is characterized by having a raised portion that is raised to form a depth. According to Patent Document 1, a planting base material storage unit that stores a planting base material such as soil and the planting base material storage unit at a predetermined depth in order to make the planting base material have a predetermined thickness. Since the panel body is provided with a raised portion that is raised so as to be formed, the planting base material such as heavy soil exists only in the planting base material storage portion, and the raised portion forms part of the panel body. Therefore, by constructing the panel body with a lightweight material, the load on the rooftop installation surface can be significantly reduced compared to the case where the base is made only of planting base materials such as soil, Therefore, since the thickness of the planting base material stored in the planting base material storage part can be increased accordingly, planting a so-called ground cover pot plant with a large amount of transpiration such as vegetation in a pot. Can be grown on planting base material in the base material storage As a result, suitable for suppression of the heat island phenomenon, it is also possible to realize a diversity of plants, and a green roof construction panel, there is an effect that it is possible to provide a construction system using the panels.

JP 2006-204291 A

However, in Patent Document 1, a ground cover pot plant that is generally vegetated in a pot is basically targeted, and maintenance is performed while ensuring a dense covering and long-term stable growth of the cocoon-shaped plant, which is the main object of the present invention. It can be said that it is difficult to achieve a significant reduction in the above. In Patent Document 1, the “lifting portion” is a planting base material storage portion that stores a vegetation base material such as soil, and the planting substrate material storage portion in order to make the planting base material have a predetermined thickness. It is stipulated as a “lifting portion” that raises the depth to the depth of the plant, and is merely a combination of pots for planting ground cover pot plants. Moreover, it is the structure assumed that planting grows only in a plant base material storage part. Therefore, the heat island effect is limited as greening, and it is difficult to form a uniform covering surface by a cocoon-type plant represented by turf.

As a result of intensive research, the inventors have found that, under environmental stress, plants, especially cocoon-type plants, develop hatching due to a remarkable habituation (acclimation) principle and stress-resistant responses such as disease resistance and drought resistance. By utilizing this, it was possible to achieve both stable growth, which was difficult in the past, and significant maintenance reduction. In addition, by using plants with grass stems such as turf, so-called plant-shaped plants, and by determining the ratio of root area securing part (viability securing part) and stem spreading part (part where environmental stress is applied to the plant), Based on the environmental stress response principle of plants, we succeeded in developing an outer insulation greening member for rooftop greening that can greatly reduce maintenance by utilizing the leveling and hatching phenomenon. In addition, outside heat insulation greening is a greening with the function of external heat insulation using a heat insulating material.

The root area securing part is the root area that is necessary for the long-term stable growth of the cocoon-type plant, that is, the root of the plant body grows necessary and sufficient and causes the acclimation reaction to the whole plant body. This is a part for supplying the minimum amount of nourishing water and space necessary for the squeezing, and generating new shoots and supplying them to the expanded part of the shoots, and automatically updating them. For this purpose, a depth of at least 30 mm or more is required from the results of growth experiments on various cocoon-type plants, while an excessive depth is unnecessary, and 200 mm is sufficient.

The stem development part is a part where the vegetation base material (initial soil component filled for planting the cocoon-type plant) exists at a depth of 0 to 40 mm. In response to environmental stress due to lack of growth space, etc., habituation reaction and environmental stress responsive substances are induced. Therefore, practically, depending on the plant species, an appropriate ratio between the root zone securing part and the stem expansion part can achieve both stable growth and a significant reduction in maintenance due to acclimatization.

That is, in order to achieve the above object, the outer heat insulating greening member according to the first aspect of the present invention is an outer heat insulating greening member used in an outer heat insulating greening method by a roof-type plant, and is on the upper surface side of the outer heat insulating greening member The root area securing part and the stem area developing part are connected to each other by the root area securing part connecting groove part, and the root area securing part and the root zone securing part connecting groove part are provided. This is a closed-cell foamed molded product with a foaming ratio of 10 to 90 times used by filling the part with a vegetation base material, the depth of the root area securing part is 30 to 200 mm, and the depth of the vegetation base material in the stem development part is 0 to a 40 mm, area of all of the root zone securing unit consisting of the root zone reserved portion connecting groove root zone secured portion S _b and the area of all the stolons expansion unit consisting of stolons expansion portion and the vegetation base guide protrusion and the peripheral portion 10 S the ratio _S op / _{S b} with _op 0.5 An optimum 40, is characterized in that the allowed to grow prostrate type plants exterior insulation greening member top surface filled with vegetation base material.

The outer heat insulating greening member according to claim 2 is the outer heat insulating greening member according to claim 1, wherein a film having a thickness of 0.02 to 2 mm is formed on a portion of the outer heat insulating greening member in contact with the vegetation base material. It is characterized by having.

The outer heat insulating greening member according to claim 3 is the outer heat insulating greening member according to any one of claims 1 to 2, wherein the thin vegetation base material of the stem expansion portion of the outer heat insulating greening member is It has a guide projection for keeping the thickness constant.

As described above, according to the outer heat insulating greening member according to claim 1 of the present invention, when the rooftop of a building is covered with a cocoon-type plant, environmental stress is applied to the cocoon-type plant, so that the acclimation is remarkably acclimated. Acclimatization and hatching due to the (acclimation) principle, and stress response such as disease resistance and drought resistance occur. As a result, there is an effect that it is possible to achieve both stable growth of dredged plants, which has been difficult in the past, and significant reduction in maintenance. As a result, since the amount of vegetation base material is reduced, the wet weight of the entire system is greatly reduced, and the cost can be kept low.

According to the outer heat insulating greening member according to claim 2 of the present invention, since the fine unevenness on the surface of the outer heat insulating greening member becomes smoother, the root of the plant that easily enters the fine unevenness of the outer heat insulating greening member. This prevents the intrusion of stalks and stalks, and prevents the concrete slab layer, waterproof layer, and adhesive layer of the building from being destroyed by plant roots and stalks.

According to the outer heat insulating greening member according to claim 3 of the present invention, it is possible to easily manage the thickness of the planting base of the stem development part, and to easily manage the growth of the cocoon-type plant, By changing the thickness depending on the type, the effect of leveling and hatching can be expressed, and it is possible to achieve both long-term stable growth and significant reduction in maintenance.

It is a top view of the outside heat insulation greening member based on embodiment of this invention. FIG. 2 is a cross-sectional view of the outer heat insulating greening member according to the embodiment of the present invention, taken along (1)-(1) in FIG. FIG. 2 is a cross-sectional view taken along the line (2)-(2) in FIG. 1 of the outer heat insulating greening member according to the embodiment of the present invention. It is a bottom view of the outside heat insulation greening member based on embodiment of this invention. It is a perspective view of the outside heat insulation greening member based on embodiment of this invention. It is a system sectional view of an outside heat insulation greening member concerning an embodiment of the invention. It is another example of the top view of the outside heat insulation greening member based on embodiment of this invention.

Examples of the outer heat insulating greening member according to the best mode of the present invention will be described with reference to FIGS.

FIG. 6 shows a system cross-sectional view of the outer heat insulating greening member according to the embodiment of the present invention. A vegetation base material 13 is laid down on the root area securing portion 2 and the stem development portion 3 described later of the outer heat insulating greening member 1, and the culm plant 14 is vegetated on the vegetation substrate. The cocoon-type plant is a plant having a stalk, and the cocoon-type plant 14 includes strawberries, mint, high-kind pomegranate, as well as cocoon-type turf such as korai turf, which is commonly used in rooftop greening, Orchid orchid orchid, white sesame, and sesame can be used. Since the plant 14 can share water and nutrients throughout the plant body through the stem, even if the soil is localized to some extent, the entire plant can be grown uniformly without locally dying. Is possible. At this time, by reducing the amount of soil, the maintenance of the culm plant can be greatly reduced, and at the same time, the weight and cost of the entire system can be significantly reduced. With respect to many plants including cocoon-type plants, the vegetation base material 13 may be natural or artificial lightweight soil, woody material, or the like in addition to normal soil. In the case of using a wood material, it is desirable that the material is hardly decomposable such as coconut shell, cedar, oak, pine bark, and cork waste. Since the outer heat insulating greening member 1 is required to have light weight, heat insulating property, and tread pressure resistance, the outer heat insulating greening member 1 is formed of a closed cell foam molded product. The expansion ratio is desirably 10 to 90 times. When it is 10 times or less, lightness and heat insulation are impaired, and when it exceeds 90 times, mechanical strength is extremely lowered. As the outer heat insulating greening member 1, in the case of organic materials, there are polyurethane foam, polyethylene foam, polyvinyl chloride foam, etc. in addition to extruded polystyrene foam and beaded polystyrene foam. An inorganic material may be used, but an organic material is more preferable because of its large specific gravity. In addition, in the case where the outer heat insulating greening member 1 is an organic resin foam, when the expansion ratio exceeds 30 times, the root crown is formed on the fine irregularities on the surface of the foam in the case of the wild plant 14 having a strong root. The phenomenon of intrusion and expansion into the foam was confirmed. For this reason, when a coating layer of 0.02 mm or more was provided on the surface by paint, heat treatment, film lamination, etc., and the surface was made smooth, no root biting occurred. In the case of heat treatment, a film can be easily formed by hot pressing or the like, but the film forming conditions are easily influenced by factors such as the material, manufacturing method, and shape of the outer heat insulating greening member 1. Also, it is not well suited for the formation of thick films. When paint is used, a thick and strong film can be formed. Oil-based paints are easier to apply than water-based paints, but it is necessary to select a solvent composition that does not dissolve the foam. In addition, if it is 2 mm or more, it becomes expensive in cost, and it is difficult to realize film formation by painting, and peeling may occur when it is dared to paint. Regarding film lamination, the existing product film thickness is limited, and if the film thickness is too thin or too thick for molding, laminate molding becomes difficult. Therefore, it is desirable that the film has a thickness of 0.02 to 2 mm in both paint and heat treatment. Further, by installing the parting material 15 at the end, it is possible to prevent the stems and roots from reaching the roof top surface 16. Although it is possible to make a film or sheet molded product that is in close contact with the shape of the outer heat insulating greening member 1 in advance and put this on the outer heat insulating greening member 1, it is not always practical due to cost constraints at present. . By including a repellent component that suppresses root growth in the paint surface and in the vicinity of the paint surface in the paint, the coating film thickness can be further reduced.

Table 3 shows the results of evaluating the root prevention effect of the coating film of the present invention. August 2010 with or without a coating on the surface of the expanded polystyrene molded product (50 times expanded, root area securing part depth 140mm, bottom expanded polystyrene thickness 60mm) in contact with the vegetation base material On the 25th, Kourai turf was grown and the invasion of roots into the polystyrene foam molded product was observed on November 20, 2011. The following results were obtained, confirming the importance of the root-preventing function by the coating film. . The coating film of the product of the present invention had a total of 70 μm including two layers of a primer (silicon epoxy modified cationic paint) and a top coat (synthetic emulsion paint).

The leveling is to make the plant grow in a constant and uniform manner, and is one of the factors that greatly contribute to the long-term stability of the plant. An individual of a cocoon-type plant grows extensively and integrally with a stem, and even if part of the plant is affected by stress, ultimately all organs of the plant will be affected . Such interlocking of the whole plant is mediated by plant hormones and environmental stress response substances. As soon as a part of the plant is subjected to stress conditions, changes occur in the system of plant hormones and environmental stress responders. These changes induce reactions that minimize the effects of stress and maintain life, that is, metabolic processes in the short term and morphological changes in the long term. (This is called acclimation (acclimation) of the plant.) The stem development part in the present invention has only a limited root area and is subjected to stress conditions such as drying, lack of nutrients, and high temperature, and therefore responds to this. Therefore, the whole individual is shortened, that is, hatched, such as internodes and upright stems. In addition, the nourishing water absorbed in the root area securing part is immediately distributed to the stressed stem development part and tries to take a balanced form as a whole plant. On the other hand, hatching restricts the growth of plants. The leveling and hatching phenomenon means that these two factors are expressed in plants at the same time. In the present invention, while using the characteristic behavior called “smoothing / hatching phenomenon” which is an expression form of habituation shown under environmental stress of a plant, a cocoon-type plant is used, and (1) roots and stems are used. Generation and renewal, and supply and renewal of new stalks to the stem development part, stable and stable nutrient absorption and distribution of nutrients to the stem development part. Root area securing part and (2) under the stress of nutrient uptake absorption, the nourishment water distributed from the root area securing part is also used, so that the stem grows and expands (in other words, the expanded deployment part or stressful) By providing a certain ratio of (1) and (2) of the stem expansion part, which can be said to be the actual battle part), it is a contradictory issue of regularization and hatching, and stable long-term growth, covering and significant reduction in maintenance. Succeeded in balancing It was. In order to give environmental stress to the cocoon-type plant 14, there is also a method in which the entire vegetation base material 13 is thinned uniformly. In this case, the cocoon-type plant 14 is still leveled and hatched, but the root growth is also suppressed over the entire surface. Therefore, when temporary excessive environmental stress such as extreme heat or lack of nutrients is applied, it becomes difficult to balance the opposite leveling and hatching and stable growth, and the whole plant often dies. . In the present invention, the vigorous roots of the cocoon-type plant 14 are partially grown, and the entire plant body is unlikely to die even against temporary excessive environmental stress. In addition, the phenomenon of leveling and hatching is developed over the entire surface, and the tolerance to environmental stress is broader in balance with stable growth. Needless to say, this is achieved for the first time by using the acclimatization phenomenon of the cocoon-type plant 14. Therefore, even if compared with the simple plant pot vegetation as shown in Patent Document 1, its purpose, application, effect and its idea / principle are fundamentally different.

FIG. 5 shows a perspective view of the outer heat insulating greening member 1 according to the embodiment of the present invention. FIG. 1 shows a top view of the outer heat insulating greening member 1 according to the embodiment of the present invention. The outer heat insulating greening member 1 is roughly divided into a root area securing part 2 and a stem expansion part 3.

The root area securing unit 2 stores the roots of the cocoon-type plant 14, and water and fertilizer are supplied from the root area securing unit 2 to the entire plant. Although the root area securing part 2 is locally formed on the outer heat insulating greening member 1, in order to uniformly grow the cocoon-shaped plant 14 on the entire roof surface, It is desirable that the root area securing portion 2 is present on the outer heat insulating greening member 1 as a whole and at the same pitch. Further, it is desirable that the root zone securing portions 2 are connected to each other by a root zone securing portion connecting groove portion 17. This is because the water and nutrients of all the root zone securing portions 2 can exist uniformly by the root zone securing portion connecting groove portion 17. The depth of the root zone securing portion connecting groove 17 is preferably the same depth as the root zone securing portion 2. The whole root zone securing part is composed of these “root zone securing part 2” and “root zone securing part connecting groove part 17”, and “the area S _b of the whole root zone securing part” in claim 1 is the sum of these. Point to. In some embodiments, as shown in FIG. 7 (h) to (k), S _b may be formed only on all linked groove. Although the depth of the root area securing part 2 depends on the plant, 30 mm is required when experimentally confirming the growth of the plant. However, if the thickness is 200 mm or more, the growth of the cocoon-type plant 14 is not greatly affected, but the weight and cost increase. Further, although it is not an essential condition, when a plurality of shapes of the root area securing unit 2 are individually arranged as in the example of FIG. 5, the area per root of the root area securing unit 2 is 25 to 400 cm ^2. It is desirable that The area per one place of root zone securing portion 2 is less than 25 cm ^2, it may become difficult to play the role of the root zone securing unit 2 growth is too long and the inhibition of prostrate type plant 14, also a 400 cm ² This is because if it exceeds, hatching of the cocoon-type plant 14 is difficult to occur.

The stalk development part 3 is a part which expands and develops the stalk of the stalk type plant 14, and is a part which applies a certain environmental stress to the plant body. Since there is no vegetation base material 13 or it is very thin, it cannot absorb enough nutrients and is under stress of growth. The minimum growth is guaranteed by nutrient nutrients from the root area securing part 2, and gradually stressed. Shows morphological adaptations such as hatching, that is, upright stems, shortening of leaf length, shortening of intercostal stems, generation of side branches, etc., and thus maintenance of irrigation, pruning, fertilization, etc. is greatly Can be reduced. The root area securing part 2 also develops roots, generates and extends new shoots, and supplies new shoots to the shoot development part 3, while distributing nourishing water to the shoot development part 3; Upright stems become shorter and show a hatching phenomenon. As described above, the leveling means that the cocoon-type plant 14 shares the nutrient water as a whole plant and balances and responds to the environmental stress. , Hatch. The deeper the stem development part 3 is, the better the plant growth conditions are, but the leveling and hatching phenomenon is weakened, and the maintenance is difficult to reduce. When the depth of the vegetation base material 13 becomes 40 mm or more in the stem development part 3, the root growth becomes remarkable in the stem development part 3, so that necessary stress cannot be applied, and hatching does not easily occur, reducing maintenance. It becomes difficult. Like strawberries and Iwadaresou, the stalks grow even in the absence of soil, and the cocoon-type plant 14 and the sod (cutting grass) of any size that can be rooted from the nodes in the adjacent root area securing part 2 In the case where the formed cocoon-shaped plant 14 is laid on the entire surface and the soil thickness of the production field attached to the sod exceeds about 10 mm, a new vegetation base material 13 is formed in the stem development part 3. Not particularly necessary. Usually, in the case of turf sod, when it is cut out at the production site, it is shipped with about 3 to 5 mm of soil in the production field. In this case, it is desirable that the turf sod be constructed after the vegetation base 13 having a thickness of 5 to 10 mm is laid on the stem development part 3. About the depth of the vegetation base material 13 in the stem development part 3, by providing the peripheral part 10 and the vegetation base material guide protrusion 11, it becomes possible to manage easily at the time of system construction. The vegetation base material guide protrusion 11 is an auxiliary guide protrusion for making the thickness of the vegetation base material 13 of the stem expansion portion 3 uniform during construction (when filling the vegetation base material 13). Belongs to the whole stem development part (part giving environmental stress to a plant, that is, S _op ) together with the peripheral part 10. Actually, the stem grows over the entire surface of the vegetation base material guide protrusion 11 and the peripheral portion 10 as it grows. Moreover, the corner | angular part of the part where the vegetation base material guide protrusion 11 and the peripheral part 10 stand up from the stem development part 3 is made into R shape instead of a right angle, and the penetration | invasion with respect to the corner part of a stem can be avoided.

If the ratio of the root area securing part 2 to the stem development part 3 increases, the growth of the plant becomes vigorous, but leveling and hatching are less likely to occur, and plant maintenance (cutting, fertilizing, irrigation, etc.) is more frequent. In addition, the amount of water-retaining vegetation base material 13 increases and the weight of the entire system increases. On the other hand, when the ratio of the root area securing unit 2 is reduced, the weight of the entire system is reduced and the maintenance of the plant is reduced. However, if the minimum growth guarantee necessary for stable growth of the plant cannot be guaranteed, Growth becomes difficult, leading to decline and devastation. The ratio S _{op /} S _b of the area S _b and stolons expansion portion area S _op of root zone securing portion, the root zone type of vegetation base securing portion, depth, stolon development of the presence and the thickness of the vegetation base, prostrate Although it varies depending on the type of type plant, as a result of experimental examination, it is necessary to be 0.5 to 40 in the range of generally available plants, but 1 to 30 is more desirable. The stems will spread and expand across multiple root area securing parts, and will distribute nutrients and phytohormones etc. to the stem development part under environmental stress that there is no vegetation base material or very thin. Thus, the entire plant is leveled and hatched, and the plant surface of the cocoon-shaped plant can be kept stable for a long period of time so that it can withstand practical use.

The sprinkler can be accommodated by installing the sprinkler installation portion 9 in the outer heat insulating greening member 1. Irrigation needs to be carried out to such an extent that the cocoon-type plant 14 does not decline due to excessive drought stress, and the cooling effect due to water transpiration is not diminished. Water needs to be supplied before initial wilting. For example, in the case of turf, it is necessary to irrigate immediately after the leaf begins to roll. In practice, it is often difficult to always keep in mind the state of the leaves, and it is desirable to automatically provide water by automatically providing a moisture sensor in the 13 layers of the vegetation base material. As a water supply method, water may be sprinkled from the upper surface with a sprinkler or the like, or water may be supplied from a water supply tube embedded in the vegetation base material 13. It is also possible to provide a water reservoir at the bottom of the root area securing unit 2.

FIG. 2 shows a cross-sectional view (1)-(1) in FIG. 1 of the outer heat insulating greening member 1 according to the embodiment of the present invention. FIG. 3 is a cross-sectional view of (2)-(2) in FIG. 1 of the outer heat insulating greening member 1 according to the embodiment of the present invention. FIG. 4 is a bottom view of the outer heat insulating greening member 1 according to the embodiment of the present invention. By providing the water storage guide protrusion 12 on the outer heat insulating greening member 1, the outer heat insulating greening member 1 can have a water storage function. Further, the outer heat insulating greening member 1 can be connected in an arbitrary number in the plane direction by providing the fitting portion A4 and the fitting portion B5. In addition to the fitting part A4 and the fitting part B5, the outer heat insulating greening members 1 can be connected to each other using a fixing bracket or the like, but a gap is formed so that the root does not enter the roof top surface 16 from the connecting part. It is desirable not to squeeze. In addition, the structure of the mating part has both a gravitational direction and a semi-gravity direction mating surface, so that the root has the gravitational principle of the root to enter the waterproof layer surface, etc. Can be prevented. Furthermore, a drainage groove 6 is formed on the lower surface so that water existing on the rooftop surface 16 can be quickly discharged. In order to reduce the material cost of the outer heat insulating greening member 1, a gap 8 is formed on the lower surface. At this time, it is preferable that the support portion 7 is formed so that the outer heat insulating greening member 1 is not broken by a stepping pressure from above.

FIGS. 7A to 7F show other examples of top views of the outer heat insulating greening member 1 according to the embodiment of the present invention. The bear of the implementation of the present invention is not limited to these examples. (A) And (b) is an example of a top view of the simplest outer heat insulating greening member 1 having a root area securing part 2 and a stem development part 3 according to an embodiment of the present invention. Further, as shown in FIG. 7 (f), there is a case where the root zone securing portion 2 and the root zone securing portion connecting groove portion 17 are integrated. There is no particular restriction on the distance between adjacent rhizosphere securing units 2 (that is, the pitch of the rhizosphere securing unit 2), but the length of the turf stems is about 1 m, so that it is within 2 m. Is desirable. If it is about 0.5 m, a dense lawn surface can be formed over the entire surface.

Table 1 shows the results of a growth test (average leaf length measurement) using the system of the outer heat insulating greening member 1 having the form shown in FIGS. 1 to 6 according to the embodiment of the present invention. Regarding the embodiment using the present invention, the ratio S _op / S _b of the area S _b of the root area securing part 2 and the projected area S _op of the stem development part 3 is 3, and the per area of the root area securing part 2 Volume is 100cm ² , root zone securing part 2 depth 200mm, vegetation base material 13 cedar and birch bark deposited and fermented for 2 years and water-retaining volcanic gravel (average diameter 2mm) Using a mixture with a ratio of 2: 1, the depth of the vegetation base material 13 in the stem development part 3 is 10 mm, and the average leaf length as the cocoon-type plant 14 (measures an arbitrary 20 leaf length, and calculates the average value) (Calculation) planted Korai grass (Tottori Prefecture lawn production association) with a diameter of 22 mm. For the control plot, the vegetation is a mixture of persistent decomposable material that has been deposited and fermented with 200 mm thick cedar and birch bark for 2 years and water-retaining volcanic gravel (average diameter 2 mm) at a volume ratio of 2: 1. On the base material 13, a korai turf sod having an average leaf length of 22 mm was planted as a saddle type plant 14 on the entire surface. As the volcanic gravel, Kagoshima Bora soil with an apparent specific gravity of 0.6 was used. The volcanic sand gravel was used to give moderate permeability to the vegetation base material, to improve the shape retention of the treading pressure, and to prevent volume reduction. Fertilization was not performed, and water was irrigated with 4 L / m ² of water per week in addition to rain water. These two systems were placed outdoors in Hofu City, Yamaguchi Prefecture from August 1, 2007 to August 1, 2010, and the average leaf length after one month was measured. From the first year to the third year of vegetation, the average leaf length of the embodiment using the present invention is compared with the case of the conventional uniform vegetation base (soil) thickness in the control plot. A large difference was confirmed, and a significant reduction in maintenance due to leveling and hatching of the cocoon-type plant according to the present invention was confirmed.

An embodiment using the present invention (S _op / S _b ≈2.6, area about 187 cm ² per root area securing part, depth 80 mm, vegetation base material guide part thickness 10 mm) is used. A comparison was made between the form example and the conventional control group (storage drainage board, vegetation soil having a thickness of 150 mm uniformly provided on a water-permeable sheet). As vegetation base, we used cedar and birch bark fermented for 2 years in outdoor compost and 2: 1 mixed volcanic gravel. , From May 5, 2011 to November 20, 2011, was observed at 535 Ogata, Hamakata, Hofu City, Yamaguchi Prefecture, in the research field of Kaisui Chemical Co., Ltd. During this time, cutting and fertilization were not performed. Table 2 shows the observation results (leaf length from the ground).

本発明形態例では，全く刈り込みを要さず，一方，対照区では大きく徒長して，通常管理の場合，刈り込みを３〜４回程度必要とするレベルであった。植生初年度より葉長は大きい差異が確認され，本発明による匍匐型植物の均整化・矮化によるメンテナンスの大幅軽減が確認された。

In the embodiment of the present invention, no pruning was required at all, while in the control plot, the length was greatly increased, and in the case of normal management, the pruning was at a level that required about 3 to 4 times. A large difference in leaf length was confirmed from the first year of vegetation, and a significant reduction in maintenance due to leveling and hatching of the cocoon-shaped plant according to the present invention was confirmed.

As described above, the inventions described in claims 1 to 3 include the creation of a new value space by greening, construction on buildings for the purpose of heat island countermeasures, reduction of air conditioning energy of buildings, and It can be installed on the roof of the building for the purpose of protecting the building from thermal stress, etc., greatly reducing maintenance and contributing to the spread of rooftop greening. In addition to the rooftop of the building, the present invention can be applied to a greening part such as a veranda, a greening of a paved surface, and an exterior of a house.

DESCRIPTION OF SYMBOLS 1 ... Outer heat insulation greening member 2 ... Root area securing part 3 ... Stem expansion | deployment part 4 ... Fitting part A 5 ... Fitting part B 6 ... Drainage groove 7 ... Support part 8 ... Gap part 9 ... Sprinkler installation part 10 ... Peripheral part DESCRIPTION OF SYMBOLS 11 ... Vegetation base material guide protrusion 12 ... Water storage guide protrusion 13 ... Vegetation base material 14 ... Vertical plant 15 ... Parting material 16 ... Roof top 17 ... Root area securing part connection groove part

Claims (3)

An outside heat insulation greening member used for an outside heat insulation greening method using a roof-top plant, having a root area securing part and a stem expansion part on the upper surface side of the outside heat insulation greening member, and the root area securing parts are mutually rooted. In the closed cell foam molded product with a foaming ratio of 10 to 90 times used by filling the root zone securing portion, the root zone securing portion coupling groove portion, and the stem development portion with a vegetation base material. Yes, the depth of the root area securing part is 30 to 200 mm, the depth of the vegetation base material of the stem development part is 0 to 40 mm, and the total root area securing part comprising the root area securing part and the root area securing part connecting groove part the area _{S b,} ratio _S op / _{S b} of the area _{S op} total stolons expansion unit consisting葡匐stem development part and vegetation base guide protrusion and the peripheral portion 10 is 0.5 to 40, vegetation base material of Grow a cocoon-shaped plant on the top of the outer heat insulating greening member Characterized in that, external insulation greening member. 2. The outer heat insulating greening member according to claim 1, wherein a film having a thickness of 0.02 to 2 mm is provided on a portion of the outer heat insulating greening member in contact with the vegetation base material. It has a vegetation base material guide protrusion for keeping the thickness of the thin layer vegetation base material of the stem development part of the outer heat insulation greening member constant, The claim 1 characterized by things. Outside heat insulation greening member.

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