JP4816029B2 - Structure exterior material and exterior structure using the exterior material - Google Patents

Description

  The present invention relates to an exterior material for a structure such as a building, and more particularly to an exterior material provided with a hydrophilic layer on the surface and an exterior structure using the exterior material.

In recent years, urban warming has been achieved by applying a hydrophilic film to the exterior material, spraying water onto the structure where the exterior material with the hydrophilic film is installed, and washing the exterior material, and the evaporation effect of water on the exterior material surface. Proposals for measures and energy saving have been made.
As one of such proposals, Patent Document 1 (Japanese Patent Publication No. 2003-525744) discloses a substrate having a photocatalyst and / or a hydrophilic coating on at least a part of the surface, and this coated There is a substrate having a photocatalyst and / or a hydrophilic coating on at least a part of the surface, characterized in combination with a device for distributing water on the surface.
This proposal aims to reduce the frequency of cleaning required to keep the exterior material clean compared to untreated exterior materials or exterior materials that do not involve the distribution of water. It is expected to increase the durability by opening, reducing the amount of detergent used, and reducing the mechanical burden on the coating.

As another proposal, in Patent Document 2 (Japanese Patent Laid-Open No. 2002-201727), a hydrophilic layer capable of holding a water film is formed in a predetermined region of a structure wall surface or a roof surface. A cooling method for an urban space has been proposed, characterized in that water is supplied to the layer formation region of the water and the surrounding air and structures are cooled by latent heat accompanying evaporation.
In this proposal, due to the superhydrophilicity due to the photocatalytic effect, the water film can be formed very thin, and the evaporation efficiency is good and the amount of water supply is very small compared to the conventional method of watering the structure. There is going to be.

The common point of the above-described conventional example is that the surface of the exterior material is made hydrophilic and a uniform water film is formed to obtain the effect of cleaning or heat dissipation.
Special table 2003-525744 gazette JP 2002-201727 A

  In order to obtain a cleaning effect or heat dissipation effect of the exterior material, it is necessary to form a uniform water film on the surface of the exterior material. In this regard, as shown in the conventional example, it is known that it is useful to form a hydrophilic film such as a photocatalyst on the surface of the exterior material, and good results have been reproduced in element tests with a panel body alone. I know I can.

  However, when used as an exterior material for a building structure or the like, it is necessary to affix a plurality of single panels to the surface of the structure, and there is always a joint. Therefore, unless the watering device is combined for each joint portion, the effect shown in the prior art cannot be expected unless the continuity of the water film beyond the joint portion, particularly the horizontal joint is secured.

  Generally, the joint is filled with a sealing material. The sealing material is manufactured from a synthetic resin such as acrylic, urethane, or silicone, and has water repellency. For this reason, even when a uniform water film is formed on the panel portion of the joint, the water flow is repelled by the sealing material portion of the joint, resulting in a streak of water flow. The streak-like water flow formed here is not necessarily formed at regular intervals, and it is difficult to form a uniform water film in the panel portion of the joint basement.

This is the same if the water film does not spread reliably after passing through the joint even when the sealing material is not filled or the level of the sealing material is set lower than the panel surface. That is, even in such a case, a water droplet falls at the lower part of the panel on which a uniform water film is formed, and reaches the upper part of the panel in the basement part, more specifically, the vicinity of the corner part composed of the upper and upper end parts of the panel surface. A streaky water flow is formed on the panel surface.
When a streak-like water flow is generated, the heat dissipation effect is not obtained as planned, and the degree of dirt is different between a portion where the water flow is present and a portion where the water flow is not present, and the aesthetic appearance is significantly impaired.

As described above, the conventional technology is useful for a single panel, but when it is installed on the wall surface of a structure such as a building, the current effect is not necessarily obtained.
In other words, in the conventional example, when a plurality of exterior materials with hydrophilicity are applied to the structure surface, what measures should be taken to make it possible to form a uniform water film on the entire structure surface? Was left.

  The present invention has been made to solve such problems, and in the case where an exterior material provided with a hydrophilic layer such as a photocatalyst is applied to the structure, the continuity of the water film is ensured, and the cleaning effect and heat dissipation by watering are ensured. It aims at providing the exterior structure which comprises the exterior material which can exhibit an effect, and this exterior material.

(1) The exterior packaging material of the structure according to the present invention is a panel-shaped packaging material in which a hydrophilic layer is formed on a surface and an outer peripheral end surface, and among the hydrophilic layer, a surface upper edge and the surface upper edge The hydrophilic layer on the continuous outer peripheral upper end surface is characterized in that the hydrophilicity is increased so that the contact angle of the dropped water is smaller than that at the center of the surface.
The upper edge portion of the surface of the panel-shaped exterior material is a portion that is disposed on the upper side when the panel-shaped exterior material is installed on the surface of the structure, and is a portion that extends in the entire width direction of the surface portion. Moreover, the outer peripheral upper end surface of the panel-shaped exterior material is a part disposed on the upper side when the panel-shaped exterior material is installed on the surface of the structure, and refers to a thickness portion of the panel-shaped exterior material.
Moreover, the exterior material of a structure means a wall material, a roof material, etc., for example.

(2) Further, the hydrophilic layer in (1) is characterized by comprising a photocatalyst layer or a silicon compound layer.

(3) Moreover, the groove part covering the full width was formed in the outer peripheral upper end surface of the exterior material in said (1) or (2).

(4) In any one of the above (1) to (3), the corner formed by the upper edge of the surface of the exterior material and the outer peripheral upper end surface is formed in a chamfered shape or an arc shape. It is characterized by.

(5) Moreover, the exterior structure of the structure which concerns on this invention is an exterior structure formed by installing the exterior material in any one of said (1)-(4), Comprising: The exterior arrange | positioned at least up and down The sealing height of the connecting joint between the materials is lower than the surface of the exterior material, and an exposed portion is provided on the outer peripheral upper end surface of the exterior material of the joint basement.

(6) Moreover, in the thing as described in said (5), the sprinkling means which sprinkles water directly or indirectly to the corner | angular part formed by the outer periphery upper end surface or surface upper edge part of the uppermost exterior material, and an outer periphery upper end surface. It is characterized by having.

In the present invention, it is a panel-shaped exterior material having a hydrophilic layer formed on the surface and the outer peripheral end surface, and among the hydrophilic layer, the hydrophilic layer on the upper surface of the outer periphery and the upper peripheral surface of the outer periphery continuous with the upper edge of the surface are Since the hydrophilicity is increased so that the contact angle of the dripping water is smaller than the center of the surface, and the hydrophilic layer is exposed at the joint, the exterior material provided with a hydrophilic layer such as a photocatalyst is applied to the structure In this case, the continuity of the water film is ensured, and the cleaning effect and heat dissipation effect by watering can be exhibited.

[Embodiment 1]
FIG. 1 is an explanatory view of an exterior material according to an embodiment of the present invention. As shown in FIG. 1, an exterior material 1 according to the present embodiment is a panel-shaped exterior material in which a hydrophilic layer is formed on a surface 3 and an outer peripheral end surface 5, and at least the upper surface edge 3 a of the hydrophilic layer. In addition, the hydrophilicity of the hydrophilic layer on the outer peripheral upper end surface 5a is equal to or higher than the hydrophilicity of the central portion of the surface 3 (the portion of the surface 3 excluding the peripheral portion).

The structure exterior material 1 refers to a member that is attached to the surface of a wall or roof of a building, for example.
For example, as shown in FIG. 1, the exterior material 1 has a rectangular surface, and a portion disposed on the upper side in the installed state extends rearward to form an outer peripheral upper end surface 5 a (in FIG. 1, the shadow is shown). Part marked with). The rear end portion of the outer peripheral upper end surface 5a extends further upward to form a mounting portion 7. In this example, the attachment portion 7 is provided above and below the exterior material 1.
The outer peripheral upper end surface 5a may be formed by any method such as bending or welding, depending on the material forming the exterior material, and the curvature and angle thereof can be arbitrarily selected.

The surface upper edge portion 3a of the exterior material 1 is a part of the peripheral portion of the surface 3 of the exterior material 1 and is disposed on the upper side when the exterior material 1 is installed on the surface of the structure (see FIG. The shaded part in 1).
As described above, the exterior material 1 of the present embodiment is characterized in that the hydrophilicity of the hydrophilic layer of the upper surface edge 3a and the outer peripheral upper end surface 5a is equal to or higher than the hydrophilicity of the central portion of the surface 3. In the following, the significance of increasing the hydrophilic layer and hydrophilicity will be described.

The hydrophilic layer is a layer having the property that the supplied water wets and spreads like a photocatalyst layer. Such a hydrophilic layer is preferably a photocatalyst layer or a silicon compound layer coated with a photocatalyst represented by titanium oxide or a silicon compound. In addition, a porous material such as a cement-based foam material, a mineral-based foam material or a resin-based foam material, or an organic powder may be coated.
In addition, when using a photocatalyst, it is better to mix | blend other water retention components suitably not it alone. In addition, since a water retention component will not be decomposed | disassembled with a photocatalyst if it is an inorganic type, it is more desirable.
The management of hydrophilicity may be performed based on the density of the hydrophilic material, the surface roughness, the contact angle of the dropped water, and the like.
In order to increase the hydrophilicity, the contact angle of the dropped water is decreased by increasing the density of the hydrophilic material or increasing the surface roughness.
In the case where the hydrophilic layer is formed by post coating, the coating on the outer peripheral portion is generally thinner than the central portion on the surface, so at least the surface upper edge portion 3a and the outer peripheral upper end surface 5a are at the surface central portion. Care should be taken to ensure hydrophilicity equal to or higher than the hydrophilicity.

  In the present embodiment configured as described above, the hydrophilicity of the outer peripheral upper end surface 5a and the surface upper edge portion 3a continuous therewith is equal to or higher than the hydrophilicity of the central portion of the surface 3, When a plurality of materials 1 are installed on the structure through joints, water drops dropped from the exterior material 1 above the joints onto the outer peripheral upper end surface 5a and the corners of the upper surface edge 3a and the outer peripheral upper end surface 5a. The water film spreads in the horizontal direction on the outer peripheral upper end surface 5a due to the surface tension of the corner and the hydrophilicity of the outer peripheral upper end surface 5a. Since the surface tension of the corner acts as a water repellent at the start of watering and prevents the water film from flowing down on the surface 3, the contact angle of the corner increases when water is supplied only to the upper end surface. The water film becomes thick and the water flow locally flows from the portion where the corner surface tension reaches the limit, so that the water film cannot be spread on the surface 3. However, in the joint portion, water droplets drip also on the corner portion where the surface tension acts, so that the action is abolished and hydrophilicity is made from the dripping portion, and finally the water film on the outer peripheral upper end surface 5a extends over the entire length of the corner portion. Gravitate. And since the hydrophilicity of the surface upper edge part 3a which continues to this outer periphery upper end surface 5a is high, the water film is maintained as it is and a water film is formed in the whole surface of the exterior material 1. FIG. As a result, it is possible to reliably obtain the effects of cleaning the exterior material 1 and radiating heat.

  When the amount of water supplied to the outer peripheral upper end surface 5a of the exterior material 1 is small, the supplied water is held by the outer peripheral upper end surface 5a, and the entire outer peripheral upper end surface exposed is covered with a water film, and then the exterior It flows down in the form of a film toward the surface of the material 1.

  In order to make sure that the water film is formed in the entire horizontal direction on the outer peripheral upper end face 5a, as shown in FIG. 9 is preferably formed. By forming the groove 9, as shown in FIG. 2 (b), water is temporarily stored on the upper end surface, so that the flow from the entire width of the upper end is performed.

  As an example of the groove portion, in addition to what is shown in FIG. 2, as shown in FIG. 3, the bottom surface of the groove portion is an inclined surface inclined downward from the surface side toward the rear side (FIG. 3A). The groove wall on the surface side forms a steep slope from the surface side toward the rear (FIG. 3B), the groove wall on the surface side has a thickness (FIG. 3C), There is a groove wall on the surface side having an arc shape (FIG. 3D).

  In addition, it is desirable that the corner formed by the upper surface edge 3a and the outer peripheral upper end surface 5a is formed in a chamfered shape or an arc shape under the condition that water droplets do not drop directly on the corner. The water supplied to the horizontal part and the groove part of the outer peripheral upper end surface 5a rises by the surface tension at the corner part, and flows out to the surface locally beyond the corner part at the part exceeding the limit. When the watering device is attached to the upper part of the outer peripheral upper end surface 5a and the water is sprayed, the exposed area of the outer peripheral upper end surface 5a, i.e., the water stagnation area is larger than the joint part. Compared to a significant increase. When water spraying is continued after forming a water film on the outer peripheral upper end surface 5a, when the amount of water is large (when the water discharge pressure is high), the water is rebounded on the water surface, and the water spray is scattered in a spherical shape. In this case, the accumulated water increases to the limit of the surface tension at the end of the water film formed on the outer peripheral upper end surface 5a (the corner portion between the outer peripheral upper end surface 5a and the upper surface edge 3a), and locally from the portion exceeding the limit It is difficult to form a water film on the entire surface of the exterior material because it does not flow down to other parts at the stage where the amount of outflow from the local area and the amount of water spray are balanced. At this time, if the corner formed by the upper surface edge 3a and the outer peripheral upper end surface 5a is formed in a chamfered shape or an arc shape, the surface tension acting on the corner is reduced, and therefore the outer peripheral upper end surface 5a. The water film tends to flow out and the water flows down over the entire surface.

An example of such a corner is as shown in FIG. FIG. 12 (1) shows a chamfered shape portion 8 formed by chamfering a corner portion formed by the upper surface edge portion 3a and the outer peripheral upper end surface 5a. Water accumulated on the outer peripheral upper end surface 5a is inclined at the corner portion. It becomes easy to flow down to contact with. In this figure, the angle α formed with the outer peripheral upper end surface 5a of the chamfered surface is 135 °, but may be arbitrarily set as long as it is 90 ° or more.
FIG. 12B shows a polygonal shape by providing a bent portion in the middle of the chamfered surface of the chamfered shape portion 8.
FIG. 12 (3) shows the arc-shaped portion 10 having a corner formed by the upper surface edge 3a and the outer peripheral upper end surface 5a in an arc shape. When the corner is arcuate, the radius of the arc is preferably 6 mm or more. More preferably, the radius of curvature is 8 mm or more. FIGS. 12 (4) to (6) are examples in which corners formed by the upper surface edge 3a and the outer peripheral upper surface 5a are chamfered or arcuate while grooves are provided in the outer peripheral upper surface 5a. In this way, the corner formed by the surface upper edge 3a and the outer peripheral upper end surface 5a is continuous with the surface upper edge 3a at an angle of 90 ° or more with respect to the outer peripheral upper end surface 5a. The surface tension acting on the corner between the end face 5a and the upper surface edge 3a can be relaxed, and water can flow down to the entire surface.
The chamfer dimension may be arbitrarily determined depending on the panel thickness, but is preferably 5 mm or more.
The size of the upper end surface used for the water sprinkling part may be determined arbitrarily by checking the surface water film formation status, but the corners are excluded if the water sprinkling amount is in the range of about 100 ml to 2000 ml / min per 1 m width. The depth of the staying surface is preferably about 15 mm to 50 mm, and more preferably about 35 ± 10 mm.

In addition, although the attachment part 7 shown in said example was provided up and down and extended over the full width, as shown to Fig.4 (a), the attachment part 7 is extended to full width. It may be a part without.
Moreover, as shown in FIG.4 (b), you may provide in both sides in addition to up and down. In this case, as shown in FIG.4 (c), the attaching part 7 may be a part instead of full width.

[Embodiment 2]
FIG. 5 is an explanatory diagram of the exterior structure 11 according to Embodiment 2 of the present invention, and shows a part of the surface of the structure on which the exterior material 1 described in Embodiment 1 is installed. 6 is a cross-sectional view taken along line AA in FIG.
The exterior structure 11 of the present embodiment has a plurality of exterior materials 1 described in the first embodiment installed on the surface of the structure portion, and the exterior materials are connected to each other via the horizontal joint 13 and the vertical joint 16. At the same time, the height (joint depth) of the sealing 15 (sealing 15 is installed on the backup material 14) in the horizontal joint 13 connecting the upper and lower exterior materials is lower than the surface 3 of the exterior material 1. And the exposed part is provided in the outer peripheral upper end surface 5a of the exterior material 1 under the horizontal joint. Here, the joint depth is not particularly limited, but is preferably about 5 to 15 mm.
Note that the intersection of the horizontal joint 13 and the vertical joint 16 is processed in the same manner as the vertical joint 16 as shown in FIG.

In the present embodiment as described above, the water dripped from the exterior packaging material 1 above the horizontal joint 13 can spread in the horizontal direction as a water film on the outer peripheral upper end surface 5a of the hydrophilic packaging material 1. . Then, the spread water film flows down in a film form from the outer peripheral upper end surface 5a of the exterior material 1 to the upper surface edge 3a, and a water film is formed on the entire surface of the exterior material 1 (in FIG. The flow is indicated by arrows.) As a result, as described in the first embodiment, it is possible to reliably obtain the effects of cleaning the exterior material 1 and radiating heat.
In addition, even when there is water adhering to the surface due to rain or the like, it can be maintained as a uniform water film, so that it is possible to prevent the occurrence of streak due to the occurrence of streaky water flow.

In addition, when using what formed the groove part 9 in the exterior material upper end surface 5a as shown to FIG. 2, FIG. 3 as the exterior material 1, it is necessary to make it the height which the sealing 15 does not fill up the groove part 9 There is.
In the above embodiment, an example in which the intersection between the horizontal joint 13 and the vertical joint 16 has the same sealing height as that of the vertical joint 16 is shown. However, the intersection has the same ceiling height as that of the horizontal joint 13. It is preferable to use a deep joint. By making the intersections deep joints, the water film spreads in the lateral direction without being cut at the intersections, so that a smoother water film can be formed.
Further, the entire vertical joint 16 may be a deep joint similar to the horizontal joint 13. In this way, it is not necessary to change the depth of the joints in the vertical and horizontal directions, so the workability is improved.

[Embodiment 3]
FIG. 7 is an explanatory diagram of an exterior structure of a structure according to Embodiment 3 of the present invention.
The exterior structure of the structure according to the present embodiment includes a water conduit 17 as a watering means for spraying water on at least the outer peripheral upper end surface 5a of the uppermost exterior material 1 in the exterior structure shown in the second embodiment. is there.
The water conduit 17 is constituted by a pipe or a hose in which water discharge ports are provided at predetermined intervals. As shown in FIG. 7, the water discharged from the water conduit 17 is directed to the attachment portion 7 of the exterior material 1 that is continuous with the outer peripheral upper end surface 5a. As shown in FIG. 8, the water that hits the attachment portion 7 spreads in the horizontal direction on the outer peripheral upper end surface 5 a, reaches the surface upper edge portion 3 a in a spread state, and forms a water film on the entire surface of the exterior material 1. To do.
In the example of FIG. 7, the water conduit 17 is attached to the attachment portion 7 of the exterior material 1 with a fixture (not shown).

  In addition, the arrangement | positioning method of the water conduit 17 will not be ask | required as long as a water film can be formed in the outer peripheral upper end surface 5a of the exterior | packing material 1 in the uppermost part of an exterior structure. For example, as shown in FIG. 9, water may be directly discharged to the outer peripheral upper end surface 5 a of the exterior material 1. Further, regarding the arrangement of the water conduit 17, it may be arranged immediately above the outer peripheral upper end surface 5 a of the exterior material 1 as shown in FIGS. 7 and 9, or as shown in FIG. 10, the outer periphery of the exterior material 1. It may be arranged obliquely above the upper end surface 5a and the water discharge direction may be obliquely downward toward the outer peripheral upper end surface 5a or the corner between the outer peripheral upper end surface 5a and the upper surface edge 3a. In the example shown in FIG. 10, the water guide pipe 17 is disposed below the upper finish exterior material 19.

Moreover, it is necessary to arrange | position the water conduit 17 so that water can be sprayed to the outer peripheral upper end surface 5a of the exterior material 1 of the uppermost part at least. If water can be sprinkled on the outer peripheral upper end surface 5a of the uppermost exterior member 1, the water sprinkled on the uppermost part flows down to the lowermost part, so there is no need to provide another water conduit, the equipment is simple and the cost can be reduced. .
But you may make it provide a water conduit in a panel unit or a horizontal joint unit.

  In the present embodiment, since the water guide pipe 17 for spraying water is provided on the outer peripheral upper end surface 5a of at least the uppermost exterior material 1 in the exterior structure, a water film can be reliably formed on the exterior surface without relying on rainwater, The effect of cleaning the material 1 and heat dissipation can be obtained with certainty.

The exterior structure according to the present invention was actually produced and the effect was confirmed. The manufactured exterior structure has the following specifications.
The exterior material was a zinc-aluminum alloy-plated steel plate as a base material, and the outer dimensions were 1000 mm × 1000 mm and the plate thickness was 1.6 mm. The depth dimension is 35 mm.
The outer peripheral end face material was provided on the entire outer periphery, the upper and lower mounting portions 7 were continuous, and the side mounting portions were piece structures. The side mounting portions were adjusted so that the vertical heights were different so as not to interfere with the adjacent exterior material mounting portions.
A surface hydrophilic layer containing titanium oxide and a silicon compound is formed on the exterior material surface, and the contact angle of water at the center of the surface is 10 degrees or less. The contact angle of water is set to be smaller than the center part of the surface.
The joint widths in the upper, lower, left and right directions were provided with an interval of 25 mm, and a sealing treatment with modified silicone was performed. The sealing was finished at a position where the upper end surface of the outer periphery was exposed by about 10 mm.

  As a water conduit for watering, a hose with a diameter of 24 mm was installed on the uppermost part of the exterior material. The hose was provided with water outlets having a diameter of 0.5 mm at intervals of 20 mm, and the direction of the water outlets was directed to the exposed portion of the outer peripheral upper end surface of the exterior material. The amount of water sprayed was 200 ml / min per 1 m width.

FIG. 11 is a photograph showing a comparison between the exterior structure shown in Example 1 above and a structure in which a hydrophilic layer is not formed on the outer peripheral upper end surface of the exterior material (hereinafter referred to as “conventional example”).
In the watering method, the water conduit shown in Example 1 is arranged on the upper surface of the exterior material surface, and the water outlet is sprinkled slightly above the front surface of the exterior material.
The left four panels in FIG. 11 are examples, and the right four panels are conventional examples.
As shown in FIG. 11, a water film is formed on the entire surface of the lower two panels. On the other hand, the one on the left has a streaky flow. Thus, according to the present invention, it was proved that a water film was reliably formed even in the exterior material below the joint.

  In addition, although it is a streak-like water flow about the upper two surfaces, FIG. 11 is a state shortly after the start of watering, and the water streaks of the upper two panel panels disappear with time. A water film similar to the two lower surfaces was formed.

FIGS. 13 and 14 are explanatory views of the second embodiment. In the figure, the same parts as those shown in FIGS. 6 and 7 are denoted by the same reference numerals. In Example 2, a panel having a chamfered corner formed by the upper surface edge 3a and the outer peripheral upper end surface 5a is a water spray panel, and the general panel installed below the water spray panel is on the surface. In this example, the corner formed by the edge 3a and the outer peripheral upper end surface 5a is 90 °.
The material specifications, top / bottom / left / right joint width, and sealing treatment of the exterior material were the same as in Example 1, but the dimensions of the exterior material were external dimensions 1200 mm × 1500 mm, plate thickness 1.6 mm, and depth dimensions 50 mm.
Moreover, the water spray part panel which provided the water spray function of the uppermost part made the corner | angular part formed by the surface upper edge part 3a and the outer periphery upper end surface 5a into the chamfering shape. The chamfer dimension was 15 mm, and the angles formed by the outer peripheral upper end surface 5a and the upper surface edge 3a of the chamfered surface were equally 135 °. The watering conduit 17 for watering has a water pipe of 0.5 to 1 mm opened at intervals of 20 mm or less in a resin pipe having an outer diameter of 15 mm. The water outlet is arranged toward the upper end surface of the water spray panel. Moreover, when providing a watering apparatus in the lower part of an opening part or an intermediate floor, as shown in FIG. 14, it can standardize by setting it as the panel upper structure same as the uppermost panel.
Also in this exterior structure, as shown in the photograph in FIG. 15, a water film could be formed on the entire surface of the panel with a small amount of water spray of about 100 ml / min per 1 m of the panel width. Note that the photograph in FIG. 15 shows a state in which the surrounding scenery is reflected on the panel surface because a water film is formed on the entire panel.

It is explanatory drawing of the exterior material which concerns on Embodiment 1 of this invention. It is explanatory drawing explaining the one part shape of the exterior material which concerns on Embodiment 1 of this invention. It is explanatory drawing explaining the one part shape of the exterior material which concerns on Embodiment 1 of this invention. It is explanatory drawing of the other aspect of the exterior material which concerns on Embodiment 1 of this invention. It is explanatory drawing of the exterior structure which concerns on Embodiment 2 of this invention. It is arrow AA sectional drawing of FIG. It is explanatory drawing of the exterior structure which concerns on Embodiment 3 of this invention. It is explanatory drawing of the use condition of the exterior structure shown in FIG. It is explanatory drawing of the other aspect of the exterior structure which concerns on Embodiment 3 of this invention. It is explanatory drawing of the other aspect of the exterior structure which concerns on Embodiment 3 of this invention. It is a photograph explaining the effect of Example 1 of the present invention. It is explanatory drawing of the aspect of the corner | angular part formed by the surface upper edge part and outer periphery upper end surface in the exterior material which concerns on Embodiment 1 of this invention. It is explanatory drawing of the exterior material of Example 2 of this invention. It is explanatory drawing of the exterior material of Example 2 of this invention. It is a photograph explaining the effect of Example 2 of the present invention.

Explanation of symbols

  1 exterior material, 3 surface, 3a surface upper edge part, 5a outer peripheral upper end surface.

Claims (6)

A panel-shaped exterior material in which a hydrophilic layer is formed on the surface and the outer peripheral end face,
Among the hydrophilic layers, the hydrophilic layer at the upper edge of the surface and the outer peripheral upper end surface continuous with the upper edge of the surface is made hydrophilic so that the contact angle of the dropped water is smaller than that at the center of the surface. Structure exterior material to be used.   2. The exterior packaging material for a structure according to claim 1, wherein the hydrophilic layer comprises a photocatalyst layer or a silicon compound layer.   The exterior material for a structure according to claim 1 or 2, wherein a groove portion extending over the entire width is formed on the outer peripheral upper end surface of the exterior material.   The corner part formed by the surface upper edge part and outer peripheral upper end surface of a cladding | exterior_material is formed in a chamfering shape or circular arc shape, The structure of any one of Claims 1-3 characterized by the above-mentioned. Exterior material.   It is an exterior structure formed by installing the exterior material according to any one of claims 1 to 4, wherein the sealing height of the connection joint portion between the exterior materials disposed at least vertically is lower than the surface of the exterior material. And the exterior structure of the structure characterized by providing an exposed part in the outer peripheral upper end surface of the exterior | packing material of a basement part. 6. The structure according to claim 5, further comprising water spraying means for spraying water directly or indirectly on the outer peripheral upper end surface of the uppermost exterior member or the corner formed by the upper edge portion of the surface and the outer peripheral upper end surface. The exterior structure of things.