Exterior wall panels and exterior wall structures

Abstract

To provide an exterior wall panel capable of constructing a highly designed outer wall without making the joints formed between the outer wall panels conspicuous.SOLUTION: To solve the problem above, an exterior wall panel 1 according to the present invention is formed in a rectangular shape in front view having a pair of vertically extending vertical sides 11 parallel to each other and a pair of horizontally extending horizontal sides 12 orthogonal to the pair of vertical sides 11 as edges, respectively. It includes a plurality of vertical design grooves 2 extending continuously across the pair of horizontal sides 12 in parallel with the vertical sides 11 on the surface. The plurality of vertical design grooves 2 are composed of a first vertical design groove 3 having a flat bottom and a second vertical design groove 4 having a convex portion 41 at the bottom. The first vertical design groove 3 and the second vertical design groove 4 are arranged alternately.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an exterior wall panel used in the exterior walls of buildings such as houses, and an exterior wall structure using the same. [Background technology]

[0002] Generally, there are two main methods for constructing exterior walls of houses: wet construction and dry construction. Wet construction uses materials such as mortar and plaster mixed with water to construct exterior walls, which requires a drying curing period and the quality is easily affected by the skill of the craftsman. In contrast, dry construction uses exterior wall panels produced in a factory that are assembled on-site to construct the exterior walls, which does not require a drying curing period, and the quality of the exterior wall panels is consistent because they are factory-produced, and the quality of the construction on-site is not as dependent on the skill of the craftsman as with wet construction. For this reason, the housing industry has increasingly adopted the dry construction method using exterior wall panels in recent years, which has the advantage of shortening construction time and allowing for quality control.

[0003] Incidentally, the design of an exterior wall is important because it is an element that constitutes the appearance of a building. Therefore, various designs such as masonry and brick have been proposed for exterior wall panels. The design of an exterior wall panel is generally designed by providing grooves and other irregularities on the surface to the extent possible while ensuring basic performance as an exterior wall, such as fireproofing and insulation, and efficiency of production in a factory. Among them, an exterior wall panel has been proposed in which a design groove is provided on the surface as a dummy joint that imitates the joint formed between adjacent exterior wall panels (see, for example, Patent Document 1). Since exterior wall panels are produced in a factory and need to be transported to the site, there is a limit to the size of each exterior wall panel. Therefore, multiple exterior wall panels are arranged vertically and horizontally, and joints are formed between adjacent exterior wall panels. If such joints formed between exterior wall panels are noticeable, the appearance of the building will be impaired. Therefore, by providing design grooves that act as dummy joints on the surface of the exterior wall panels, the actual joints formed between the exterior wall panels are made to blend in with the dummy joints, making them less noticeable. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-200991 A Summary of the Invention [Problem to be solved by the invention]

[0005] When an exterior wall is constructed using multiple exterior wall panels, a sealant is generally applied to the joints formed between the exterior wall panels for waterproofing. Patent Document 1 describes that the design groove is formed so that the joint groove after the sealant is filled into the joints between the exterior wall panels and the design groove that serves as the dummy joint have the same cross-sectional shape. Usually, the bottom of the joint groove after the sealant is filled is a substantially flat surface without any irregularities, so the design groove that serves as the dummy joint that imitates this is also formed with a flat bottom. Patent Document 1 also shows the design groove with a flat bottom, and describes that a random stone masonry pattern is formed by providing a design groove that spans the entire width or length of the exterior wall panel, and providing multiple short design grooves that do not span the entire width or length of the exterior wall panel. However, although such a flat design groove without any irregularities at the bottom plays the role of a dummy joint, in terms of the design of the design groove itself, the bottom is flat and lacks texture. Therefore, in cases where a design of small pieces is to be expressed on the surface of an exterior wall panel, if many flat-bottomed design grooves are provided, the design of the exterior wall will be diminished. This is especially noticeable when viewed up close.

[0006] The present invention has been made in consideration of the above circumstances, and aims to provide an exterior wall panel that can construct an exterior wall with a highly aesthetic design without making the joints formed between the exterior wall panels noticeable. [Means for solving the problem]

[0007] In order to solve the above problems, the exterior wall panel according to the present invention is an exterior wall panel formed in a rectangular shape in a front view, with edges being a pair of vertical sides that are parallel to each other and extend in the vertical direction and a pair of horizontal sides that are parallel to each other and extend in the horizontal direction perpendicular to the pair of vertical sides, and is provided with a plurality of vertical design grooves extending on a surface so as to be continuous between the pair of horizontal sides in parallel to the vertical sides, and a plurality of horizontal design grooves extending on the surface so as to be continuous between the pair of vertical sides in parallel to the horizontal sides, the plurality of vertical design grooves being composed of a first vertical design groove having a flat bottom and a second vertical design groove having a convex portion at the bottom, the plurality of horizontal design grooves being composed of a first horizontal design groove having a flat bottom and a second horizontal design groove having a convex portion at the bottom, the first vertical design grooves and the second vertical design grooves being alternately arranged, and the second horizontal design grooves being raised to different heights. The eroded and collapsed areas were randomly arranged on the top and corners. It is characterized by having a low convex portion, a medium convex portion, and a high convex portion.

[0008] Preferably, the exterior wall panel of the present invention is characterized in that the vertical design grooves are arranged at positions that equally divide the horizontal side into at least four or more even numbers, and the vertical design groove arranged adjacent to the vertical side is the second vertical design groove.

[0010] Preferably, the exterior wall panel according to the present invention is characterized in that the horizontal design groove is formed shallower than the first vertical design groove at an intersection with the first vertical design groove.

[0011] Preferably, the exterior wall panel of the present invention is further characterized in that it is provided on the surface with an intermittent vertical design groove extending intermittently between the pair of horizontal sides parallel to the vertical sides.

[0012] The exterior wall structure of the present invention is characterized in that a plurality of exterior wall panels of the present invention are arranged in parallel in the horizontal direction, and a sealing material is filled between each adjacent exterior wall panel to form a sealing joint. Effect of the Invention

[0013] According to the exterior wall panel of the present invention, the surface is provided with a plurality of vertical design grooves that extend continuously between a pair of horizontal sides parallel to the vertical side, so that when a plurality of exterior wall panels according to the present invention are arranged horizontally to construct an exterior wall, these vertical design grooves become dummy joints for the vertical joints formed between the exterior wall panels arranged horizontally, and the vertical joints can be blended into the vertical design grooves to make them less noticeable. The plurality of vertical design grooves provided in the exterior wall panel of the present invention are composed of a first vertical design groove with a flat bottom and a second vertical design groove with a convex part at the bottom, and are characterized in that the first vertical design groove and the second vertical design groove are arranged alternately, so that the vertical joints can be blended in reliably by the first vertical design groove with a flat bottom and a high degree of imitation of the vertical joints, and the design can be prevented from decreasing by the second vertical design groove with a convex part at the bottom and a high texture, even when many vertical design grooves are provided, so that an exterior wall with high design quality can be constructed by the exterior wall panel of the present invention.

[0014] Preferably, the exterior wall panel according to the present invention is characterized in that the vertical design grooves are arranged at positions that divide the horizontal side into at least four or more even parts, and the vertical design grooves arranged at positions adjacent to the vertical side are the second vertical design grooves, so that in the exterior wall constructed with the exterior wall panel according to the present invention, three or more odd vertical design grooves are provided between adjacent vertical joints, and each vertical design groove is arranged so as to be equally spaced from each other, including the vertical joints, and the vertical joints or the first vertical design grooves and the second vertical design grooves are arranged alternately. In this way, the vertical joints and the vertical design grooves are arranged regularly at approximately equal intervals, so that the vertical joints can be made less noticeable, and the vertical joints and the first design grooves, and the two first design grooves, which have approximately flat bottoms, are not arranged next to each other, and the second vertical design grooves, which have a convex part at the bottom and have a higher texture, are arranged between them, so that the design of the exterior wall can be further improved.

[0015] Preferably, the exterior wall panel according to the present invention is further characterized in that the surface is provided with a plurality of horizontal design grooves extending continuously between the pair of vertical sides in parallel with the horizontal side, so that the surface of the exterior wall panel according to the present invention is divided vertically and horizontally by a plurality of vertical design grooves and a plurality of horizontal design grooves, and a design in which a plurality of block parts having a substantially rectangular shape when viewed from the front are arranged vertically and horizontally is formed. Therefore, by using the exterior wall panel according to the present invention, an exterior wall design equivalent to that formed by pasting and constructing block-shaped materials such as tiles one by one by a wet construction method can be easily constructed. In addition, the horizontal design groove provided on the surface of the exterior wall panel according to the present invention extends continuously between a pair of vertical sides in parallel with the horizontal side of the exterior wall panel, so that this horizontal design groove becomes a dummy joint of the horizontal joint formed between the exterior wall panels arranged adjacent to each other in the vertical direction when a plurality of exterior wall panels according to the present invention are arranged vertically to construct an exterior wall, and the horizontal joint can be made inconspicuous by being blended into the horizontal design groove.

[0016] Preferably, the exterior wall panel of the present invention is characterized in that the horizontal design groove is formed shallower than the first vertical design groove at the intersection with the first vertical design groove, so that the horizontal design groove does not interfere with the vertical continuity of the first vertical design groove, and the first vertical design groove can reliably make the vertical joints formed between the exterior wall panels less noticeable.

[0017] Preferably, the exterior wall panel of the present invention is further characterized in that it has an intermittent vertical design groove on the surface extending intermittently between the pair of horizontal sides parallel to the vertical sides, thereby preventing the appearance from becoming monotonous and enhancing the design.

[0018] The exterior wall structure of the present invention is characterized in that a plurality of exterior wall panels of the present invention are arranged in parallel in the horizontal direction, and a sealing joint groove is formed between each adjacent exterior wall panel by filling the space between the exterior wall panels with a sealant. Since the sealing joint groove has an approximately flat bottom, the exterior wall panel 1 provided with vertical design grooves 2 including a first vertical design groove having a flat bottom can reliably make the vertical joints formed between adjacent exterior wall panels less noticeable. [Brief description of the drawings]

[0019] [Figure 1] 1A is a front view of an exterior wall panel according to one embodiment of the present invention, (a) is a front view, (b) is a cross-sectional side view taken along the X arrow in (a), (c) is a cross-sectional side view taken along the Y arrow in (a), and (d) is a bottom view. [Diagram 2] FIG. 2 is a diagram of an exterior wall structure using the exterior wall panels of FIG. 1, in which (a) is a partial front view of the exterior wall structure, and (b) is a partially omitted cross-sectional bottom view of the exterior wall structure showing the vertical joints formed between the exterior wall panels. [Diagram 3] FIG. 2 is a front view of an exterior wall panel according to another embodiment of the present invention; [Figure 4] FIG. 4 is a diagram of the exterior wall panel; (a) is a partial cross-sectional side view taken along the P arrow in FIG. 3; (b) is a partial cross-sectional side view taken along the Q arrow in FIG. 3; (c) is a partial cross-sectional side view taken along the R arrow in FIG. 3; (d) is a bottom cross-sectional view taken along the T arrow in FIG. 3; and (e) is a bottom cross-sectional view taken along the S arrow in FIG. 3. [Diagram 5] FIG. 2 is a front view of an embodiment of an exterior wall panel according to the present invention. [Figure 6] FIG. 6 is a diagram of an exterior wall structure using the exterior wall panels of FIG. 5; (a) is a perspective view of the exterior from a close-up, and (b) is a perspective view of the exterior from a distant view. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of an exterior wall panel and an exterior wall structure using the same according to the present invention will be described with reference to the drawings. However, the following is merely an exemplary embodiment of the present invention, and the scope of the present invention is not limited to the following embodiment, and can be appropriately modified without departing from the concept of the present invention.

[0021] As shown in Fig. 1, an exterior wall panel 1 according to one embodiment of the present invention is a panel formed in a rectangular shape when viewed from the front, with edges consisting of a pair of parallel vertical sides 11 extending in the vertical direction and a pair of parallel horizontal sides 12 extending in the horizontal direction perpendicular to the pair of vertical sides 11. The exterior wall panel 1 is suitably used when constructing the exterior walls of buildings such as houses, and the exterior wall surface of a building is formed by arranging a plurality of exterior wall panels 1 in the horizontal and / or vertical directions and constructing them.

[0022] The exterior wall panel 1 has a plurality of vertical design grooves 2 on its surface, which extend continuously between a pair of horizontal sides 12 in parallel with the vertical side 11. The plurality of vertical design grooves 2 are composed of first vertical design grooves 3 having a flat bottom and second vertical design grooves 4 having a convex portion 41 at the bottom, and the first vertical design grooves 3 and the second vertical design grooves 4 are arranged alternately.

[0023] The exterior wall structure 100 according to this embodiment is an exterior wall structure for a building such as a house, and an exterior wall surface facing the outdoors is formed by an exterior wall panel 1. As shown in FIG. 2, the exterior wall structure 100 has an exterior wall surface formed by arranging a plurality of exterior wall panels 1 in an aligned manner at least in the horizontal direction. Each exterior wall panel 1 is arranged at a predetermined interval from the adjacent exterior wall panel 1 so that the surface on which the vertical design groove 2 is provided faces the outdoors, and a vertical joint 110 is formed between each of the exterior wall panels 1 adjacent in the horizontal direction. In the exterior wall structure 100, the exterior wall panels 1 may also be arranged side by side in the vertical direction. In that case, it is preferable that each exterior wall panel 1 is arranged vertically and horizontally in a matrix with a predetermined interval between them, as shown in FIG. 2. As a result, the position of each vertical joint 110 formed between a plurality of horizontally arranged exterior wall panels 1 coincides with the position of each vertical joint 110 formed between a plurality of horizontally arranged exterior wall panels 1 vertically adjacent thereto, and each vertical joint 110 is formed so as to be continuous over the entire vertical direction of the exterior wall panel 100. In addition, the position of each vertical design groove 2 provided in the exterior wall panel 1 also coincides between the exterior wall panels 1 adjacent in the vertical direction, and each vertical design groove 2 is formed so as to be continuous over the entire vertical direction of the exterior wall structure 100.

[0024] In the exterior wall structure 100, vertical joints 110 and horizontal joints 120 are formed at intervals of a predetermined width between each exterior wall panel 1, so that even if external forces such as earthquakes are applied, the exterior wall panels 1 are prevented from being damaged. However, since the exterior wall surface formed by the exterior wall panels 1 in the exterior wall structure 100 faces the outdoors and is exposed to rain and wind, the vertical joints 110 and horizontal joints 120 that form gaps between the exterior wall panels 1 are sealed to provide waterproofing and airtightness. In the exterior wall structure 100 according to this embodiment, the vertical joints 110 and horizontal joints 120 are sealed with a sealant 130 that is in a paste form during construction and hardens into a rubber form after construction. For the sealant 130, an amorphous sealant that has been commonly used in the past for construction of exterior wall panels and the like can be used. After each exterior wall panel 1 is attached to a base material for mounting the exterior wall panel 1 and arranged, a backup material or the like that prevents adhesion between the sealant 130 and the base material or the like is inserted from the outdoor side into the gaps between the vertical joints 110 and the horizontal joints 120 that have been formed, and then a paste-like sealant 130 is filled on top of it and hardened, thereby sealing the vertical joints 110 and the horizontal joints 120. The sealant 130 filled into the vertical joints 110 and the horizontal joints 120 hardens and becomes rubber-like, and adheres to the side surfaces of the adjacent exterior wall panels 1, respectively. Even if the exterior wall panel 1 moves due to an earthquake or the like, or the exterior wall panel 1 shrinks or expands due to temperature differences, the rubber-like sealant 130 expands and contracts accordingly, preventing rainwater, wind, and the like from entering the indoor side through the vertical joints 110 and the horizontal joints 120. If the thickness of the sealant 130 is not constant and some parts are thinner, there is a risk of cracks or the like occurring from those parts, so the sealant 130 is applied to a predetermined constant thickness so that the finished surface is approximately flat. As shown in Fig. 2(b), the vertical joints 110 and horizontal joints 120 of the exterior wall structure 100 are sealing joint grooves that are filled with the sealant 130 and formed into grooves with approximately flat bottoms.

[0025] In the exterior wall structure 100, vertical joints 110 are formed between horizontally adjacent exterior wall panels 1 as sealing joint grooves filled with sealant 130, and a plurality of vertical design grooves 2 are provided on the surface of the exterior wall panel 1, extending continuously between a pair of horizontal sides 12 in parallel with the vertical side 11, so that the vertical joints 110 and the vertical design grooves 2 are grooves extending in the vertical direction parallel to each other. Therefore, according to the exterior wall structure 100, the vertical joints 110 can be made inconspicuous by blending them into the plurality of vertical design grooves 2.

[0026] In this way, the vertical design groove 2 is a groove that serves as a dummy vertical joint that makes the vertical joint 110 less noticeable, so it is preferable that the vertical design groove 2 is formed in a shape that imitates the vertical joint 110 so as to have an appearance that is approximately the same as the vertical joint 110. The vertical joint 110 is a sealing joint groove filled with a sealant 130, and the finished surface of the filled sealant 130 is the bottom of the groove, and the bottom is an approximately flat surface having a width equal to the distance between the vertical sides 11 of the adjacent exterior wall panels 1 arranged at a predetermined interval in the horizontal direction. Therefore, the bottom of the vertical design groove 2 provided in the exterior wall panel 1 according to this embodiment is formed to be approximately flush with the bottom of the groove of the assumed vertical joint 110 and to have approximately the same width, so that the vertical design groove 2 and the vertical joint 110 are grooves with approximately the same depth and width. Here, since the bottom of the groove of the vertical joint 110 is a substantially flat surface, if the bottom of the vertical design groove 2 is formed flat, the degree of imitation of the vertical joint 110 is improved, and the effect as a dummy vertical joint can be enhanced. However, if only a large number of vertical design grooves 2 with flat bottoms are arranged on the surface of the exterior wall panel 1, the appearance design of the exterior wall panel 1 will have poor texture. Therefore, the multiple vertical design grooves 2 provided on the exterior wall panel 1 according to this embodiment are composed of a first vertical design groove 3 with a flat bottom and a second vertical design groove 4 with a convex portion 41 on the bottom, and the first vertical design groove 3 and the second vertical design groove 4 are arranged alternately. The first vertical design groove 3, which has a flat bottom surface and a high degree of imitation of the vertical joint 110, can reliably make the vertical joint 110 less noticeable, while the second vertical design groove 4, which has a protrusion 41 at the bottom and a lower degree of imitation of the vertical joint 110 than the first vertical design groove 3 but has an improved texture, can give the exterior design of the exterior wall panel 1 a high design quality while maintaining its texture.

[0027] Since both the first vertical design groove 3 and the second vertical design groove 4 are vertical design grooves 2, it is preferable that the width and depth of the bottom are substantially equal to each other and are substantially equal to the width and depth of the bottom of the vertical joint 110. As shown in FIGS. 1(b) and 1(c), if the depth of the bottom of the first vertical design groove 3 is L3 and the depth of the bottom of the second vertical design groove 4 is L4, then in this embodiment, L3 = L4, and the bottoms of the first vertical design groove 3 and the second vertical design groove 4 are in a planar shape located on substantially the same plane. At this time, L3 and L4 are designed so as to ensure a thickness considering the fire resistance, heat insulation, etc. as the outer wall of the outer wall panel 1. The first vertical design groove 3 and the second vertical design groove 4 have a convex portion 41, and the convex portion 41 is formed so as to bulge from the planar bottom of the second vertical design groove 4 toward the surface side of the outer wall panel 1. However, since the second vertical design groove 4 is a groove that extends continuously between a pair of lateral sides 12 of the outer wall panel 1, if the depth of the upper surface of the convex portion 41 is L41, the convex portion 41 is formed so that 0 < L41 < L4, and the continuity of the second vertical design groove 4 is not interrupted by the convex portion 41. The second vertical design groove 4 has unevenness formed at the bottom by such a convex portion 41 and becomes a groove with a higher texture than the first vertical design groove 3. Further, as shown in FIG. 1, in each second vertical design groove, by randomly changing the number, position, length extending in the vertical direction, etc. of the convex portions 41 provided at the bottom, different uneven patterns are formed, so that the orderly artificial impression is reduced, and the design property of the outer wall panel 1 can be further improved. The ratio of the planar bottom to the convex portion 41 in the second vertical design groove 4 is appropriately designed considering that if the ratio of the convex portion 41 becomes too large, the effect as a dummy vertical joint will be too reduced, and if the ratio of the convex portion 41 becomes too small, the effect of improving the texture will also be small. In this embodiment, the ratio of the planar bottom to the convex portion 41 is about 6 to 4. Also, if the depth L41 of the convex portion 41 is too small, it will give an impression of interrupting the continuity of the second vertical design groove 4, and if L41 is too close to L4, no unevenness will be felt. Therefore, it may be appropriately designed considering these, but in this embodiment, L41 is about 0.6L4.

[0028] By providing multiple vertical design grooves 2 in the exterior wall panel 1, the surface of the exterior wall panel 1 is divided horizontally by the multiple vertical design grooves 2, and an external design is formed on the surface of the exterior wall panel 1 in which multiple block portions 15 having a rectangular shape when viewed from the front are arranged horizontally, as shown in Fig. 1. Depending on the position and number of the vertical design grooves 2 provided in the exterior wall panel 1, the size and number of the block portions 15 formed on the surface of the exterior wall panel 1 also change, so the position and number of the vertical design grooves 2 provided in the exterior wall panel 1 may be appropriately designed to achieve a desired external design, but it is preferable that the first vertical design grooves 3 and the second vertical design grooves 4 are alternately arranged, as shown in Fig. 1. As a result, even if the number of vertical design grooves 2 provided on the surface of the exterior wall panel 1 increases, the first vertical design grooves 3 and the second vertical design grooves 4 increase in a substantially equal proportion, and the first vertical design grooves 3 and the second vertical design grooves 4 are evenly arranged on the exterior wall panel 1. This prevents a large number of first vertical design grooves 3 with flat bottoms from being concentrated in one area, thereby reducing the appearance and texture of the exterior wall panel 1, and allows for an exterior wall structure 100 with a high design quality.

[0029] Furthermore, the multiple vertical design grooves 2 provided in the exterior wall panel 1 are arranged so that the first vertical design grooves 3 and the second vertical design grooves 4 are alternately arranged, and as shown in FIG. 1, the multiple vertical design grooves 2 are arranged at positions that equally divide the horizontal side 12 of the exterior wall panel 1 into at least four or more even numbers, and the vertical design groove 2 arranged at a position adjacent to the vertical side 11 becomes the second vertical design groove 4. As shown in FIG. 2, in the exterior wall structure 100, the vertical joints 110 and the first vertical design grooves 3 have flat bottoms and the second vertical design grooves 4 have flat bottoms. The appearance is that grooves with unevenness at the bottom of the artisan grooves 4 are alternately arranged at equal intervals, and the vertical joints 110 can be made to blend in with the regularly arranged first vertical design grooves 3 to make them less noticeable, and the second vertical design grooves 4 with enhanced texture are arranged in the middle position between each two adjacent grooves with flat bottoms with convex portions 41, resulting in an appearance with an overall enhanced texture without bias, and a highly designed appearance can be achieved in which the entire exterior wall surface of the exterior wall structure 100 appears to be seamlessly connected as a single unit.

[0030] The exterior wall panel 1 may have a horizontal design groove 6 extending continuously between a pair of vertical sides 11 in parallel with the horizontal side 12 on the surface. When a plurality of exterior wall panels 1 are arranged in the vertical direction as well as the horizontal direction in the exterior wall structure 100, a horizontal joint 120 is formed between the exterior wall panels 1 adjacent in the vertical direction as shown in FIG. 2. The horizontal joint 120 becomes a sealing joint groove filled with a sealant 130, similar to the vertical joint 110. The horizontal design groove 6 provided in the exterior wall panel 1 acts as a dummy horizontal joint for the horizontal joint 120, similar to the vertical design groove 2 acting as a dummy vertical joint for the vertical joint 110, and the horizontal joint 120 can be made inconspicuous by being blended into the horizontal design groove 6. In addition, when the horizontal design groove 6 is provided in the exterior wall panel 1, the surface of the exterior wall panel 1 is divided vertically by the horizontal design groove 6. Therefore, an external design is formed on the surface of the exterior wall panel 1 in the form of vertically and horizontally arranged block sections 15 that are rectangular in front view and separated by the vertical design grooves 2 and the horizontal design grooves 6. Since the vertical length of the block sections 15 and the number of block sections 15 aligned in the vertical direction of the exterior wall panel 1 change depending on the number and positions of the horizontal design grooves 6 provided on the surface of the exterior wall panel 1, the number and positions of the horizontal design grooves 6 provided on the surface of the exterior wall panel 1 may be appropriately designed to achieve a desired external design.

[0031] In Fig. 3 and Fig. 4, similarly to the exterior wall panel 1 in Fig. 1, multiple vertical design grooves 2 are arranged at positions that divide the horizontal side 12 into at least four or more even parts, and the vertical design grooves 2 arranged at positions adjacent to the vertical side 11 become second vertical design grooves 4, and the first vertical design grooves 3 and the second vertical design grooves 4 are arranged alternately, and then multiple horizontal design grooves 6 are arranged at positions that divide the vertical side 11 equally, as in the exterior wall panel 1 shown in Fig. 3 and Fig. 4. When multiple vertical design grooves 2 are arranged at positions that divide the horizontal side 12 equally, and multiple horizontal design grooves 6 are arranged at positions that divide the vertical side 11 equally, as in the exterior wall panel 1 shown in Fig. 3 and Fig. 4, an external design is formed on the surface of the exterior wall panel 1 as if multiple block parts 15 of the same size were aligned vertically and horizontally in a matrix. If the number of vertical design grooves 2 and horizontal design grooves 6 is increased, the size of each block part 15 will be reduced accordingly, and a small-cut stone masonry pattern can be formed.

[0032] The exterior wall panel 1 may have an intermittent vertical design groove 5 on the surface, which extends intermittently between a pair of horizontal sides 12 in parallel with the vertical side 11. In the exterior wall panel 1 shown in Fig. 3, the intermittent vertical design groove 5 is provided at approximately the center between each adjacent vertical design groove 2 and at approximately the center between a pair of vertical sides 11 and the vertical design groove 2 adjacent to each vertical side 11, and each intermittent vertical design groove 5 divides a plurality of block portions 15 of the same size, which are arranged vertically and horizontally in a matrix pattern and are formed by being partitioned by the vertical design groove 2 and the horizontal design groove 6, into two equal parts in the horizontal direction to form divided block portions 16. However, as shown in FIG. 3, in each row of a plurality of block parts 15 arranged in a matrix formed by dividing them by the vertical design groove 2 and the horizontal design groove 6, there is at least one part that is not divided into two divided block parts 16 by the intermittent vertical design groove 5 and remains as a block part 15, and the intermittent vertical design groove 5 is a groove that extends intermittently between a pair of horizontal sides 12 where continuity is interrupted by the undivided block parts 15. By randomly changing the positions and number of parts where continuity is interrupted by each intermittent vertical design groove 5, an external design is formed in which undivided block parts 15 exist randomly in places among the divided block parts 16 arranged in a matrix on the surface of the exterior wall panel 1. Since the intermittent vertical design groove 5 is an intermittent groove, it does not play a role as a dummy vertical joint that makes the vertical joint 110 less noticeable, but it is effective when you want to form a small-part pattern with a high texture by diluting the orderly artificial impression on the surface of the exterior wall panel 1. In this way, the intermittent vertical design groove 5 is a suitable groove when a design with high texture is to be formed, so it is preferable to provide a convex portion 51 at the bottom of the groove portion to make it a groove with high texture and unevenness. In this embodiment, the bottom of the groove portion of the intermittent vertical design groove 5 is formed to have a width and depth approximately equal to the bottom of the vertical design groove 2, and the convex portion 51 is formed to rise from the bottom, so that if the depth of the bottom of the intermittent vertical design groove 5 is L5 and the depth of the upper surface of the convex portion 51 is L51, L5=L4 and L51=L41. The ratio of the bottom of the groove portion of the intermittent vertical design groove 5, the convex portion 51, and the area that is interrupted to become the block portion 15 may be designed appropriately, but in this embodiment, it is about 3:3:4.

[0033] In addition, in the exterior wall panel 1 shown in Figures 3 and 4, the horizontal design groove 6 is composed of two types of grooves: a first horizontal design groove 7 whose bottom is formed almost flat and is highly effective as a dummy horizontal joint, and a second horizontal design groove 8 whose bottom is uneven to enhance the texture. The first horizontal design grooves 7 are arranged at positions that divide the vertical side 11 into at least two or more equal parts, and the second horizontal design grooves 8 are arranged at positions that divide the space between each horizontal side 12 of a pair of horizontal sides 12 and the first horizontal design groove 7 arranged at the position closest to the horizontal side 12 into thirds, and when multiple first horizontal design grooves 7 are provided, at positions that divide the space between adjacent first horizontal design grooves 7 into thirds. In an exterior wall structure 100 constructed using such an exterior wall panel 1, the horizontal joints 120 and the first horizontal design grooves 7 have grooves with approximately flat bottoms and are arranged vertically at approximately equal intervals, with two highly textured base 2 horizontal design grooves 8 arranged between them, so that the horizontal joints 120 blend in with the first horizontal design grooves 7 and become less noticeable, while the second horizontal design grooves 8 create an exterior design with an enhanced texture.

[0034] The bottom of the first horizontal design groove 7 is formed to be substantially flat so as to be a dummy horizontal joint of the horizontal joint 120, and its width and depth are formed to be substantially equal to the width and depth of the bottom of the horizontal joint 120. Since the horizontal joint 120 is a sealing joint groove substantially equal to the vertical joint 110, the depth L7 of the bottom of the first horizontal design groove 7 is formed to be substantially equal to the depth L3 of the first vertical design groove 3. However, in this embodiment, as shown in FIG. 4(e), the bottom of the first horizontal design groove 7 has step portions 71 on both sides of the first vertical design groove 3, and the first horizontal design groove 7 is formed to be shallower than the first vertical design groove 3 at the intersection between the first horizontal design groove 7 and the first vertical design groove 3 by the height of the step portions 71. The step portion 71 is formed to rise from the bottom of the first horizontal design groove 7, with a length approximately equal to the horizontal length of the divided block portion 16, so that the upper surface is a plane shape approximately parallel to the bottom at a height L71 from the bottom of the first horizontal design groove 7. By providing the step portion 71 in the first horizontal design groove 7, as shown in FIG. 3, the boundary between the first vertical design groove 3 and the first horizontal design groove 7 is clear, and the appearance emphasizes the vertical continuity between the pair of horizontal sides 12 of the first vertical design groove 3. In addition, when filling the vertical joint 110 formed between the exterior wall panels 1 with the sealant 130, if the sealant 130 is applied beyond the set finished surface, it will spoil the appearance, so it is often applied slightly deeper than the set finished surface at the site. As a result, a groove is formed that corresponds to the distance between the set finished surface and the actual finished surface that is the bottom of the sealing joint groove. The first vertical design groove 3 is a groove that is deeper by the height L71 of the step 71 at the intersection with the first horizontal design groove 7, but by forming the step 71 so that the height L71 of the step 71 is approximately equal to the expected distance between the finished surface of the sealing joint groove of the vertical joint 110 and the actual finished surface that is formed deeper by the application of the sealing material 130 at the site, the first vertical design groove 3 can be made closer to the appearance of the vertical joint 110, and the effect as a dummy vertical joint can be improved. In this embodiment, L71 is about 1.5 mm.

[0035] In this way, although the first horizontal design groove 7 has a step 71 at the bottom, the top surface of the step 71 is formed flat, and the height L71 from the bottom of the step 71 is also small, so that it appears as a substantially flat groove, and the horizontal joint 120 formed between the exterior wall panels 1 as a dummy horizontal joint can be made less noticeable. At the intersections of the first horizontal design groove 7 with the second vertical design groove 4 and the interrupted vertical design groove 5, the first horizontal design groove 7 takes precedence, and the first horizontal design groove 7 has a flat bottom with a depth L7.

[0036] The second horizontal design groove 8 is a groove with an enhanced texture by providing unevenness at the bottom. In this embodiment, the second horizontal design groove 8 is formed so that the bottom is approximately the same depth as the bottom of the first horizontal design groove 7, and the unevenness is formed by providing three different convex parts, a low convex part 81, a medium convex part 82, and a high convex part 83, which rise from the bottom to different heights, to form a groove with an enhanced texture. If the depth of the bottom of the second horizontal design groove 8 is L8, the depth of the upper surface of the low convex part 81 is L81, the depth of the upper surface of the medium convex part 82 is L82, and the depth of the upper surface of the high convex part 83 is L83, then L8=L7, and L8>L81>L82>L83>0. In this way, the second horizontal design groove 8 is a groove with unevenness formed by combining three different heights of convex parts at the bottom, and is a groove that is provided to form a small-cut pattern while maintaining the texture of the exterior wall panel 1 rather than functioning as a dummy horizontal joint. Therefore, as shown in Fig. 4(d), at the intersection of the second horizontal design groove 8 with the vertical design groove 2 and the intermittent vertical design groove 5, the low convex portion 81, the medium convex portion 82, and the high convex portion 83 provided at the bottom of the second horizontal design groove 8 are convex portions having the horizontal length of the divided block portion 16 so that the vertical design groove 2 and the intermittent vertical design groove 5 are prioritized over the second horizontal design groove 8. Also, at the intersection of the second horizontal design groove 8 with the first vertical design groove 3, similar to the intersection of the first horizontal design groove 7 with the first vertical design groove 3, the low convex portion 81, the medium convex portion 82, and the high convex portion 83 are provided at the bottom of both sides of the first vertical design groove 3 of the second horizontal design groove 8 so that the second horizontal design groove 8 is shallower than the first vertical design groove 3. In this embodiment, the ratio of the bottom, low convex portion 81, medium convex portion 82 and high convex portion 83 of the second horizontal design groove 8 is approximately 1:1:3:5, and L81 = 0.85L8, L82 = 0.6L8, and L83 = 0.3L8.

[0037] An example of the exterior wall panel 1 configured as above is shown in FIG. 5, and an example of an exterior wall structure 100 using the exterior wall panel 1 of FIG. 5 is shown in FIG. 6. The exterior wall panel 1 of FIG. 5 was formed as a rectangular exterior wall panel in front view with a vertical side 11 length of 888 mm and a horizontal side 12 length of 1000 mm by Dyne concrete (Dyne: registered trademark). The vertical design grooves 2 were provided at a pitch of 125 mm at positions that divide the horizontal side 12 into eight equal parts, and the first vertical design grooves 3 and the second vertical design grooves 4 were alternately arranged so that the first vertical design grooves 3 were arranged at a pitch of 250 mm at positions that divide the horizontal side 12 into four equal parts. The intermittent vertical design grooves 5 were provided at the center positions between the adjacent vertical design grooves 2 and at the center positions between each vertical side 11 and the vertical design grooves 2 adjacent to the vertical side 11, and the intermittent vertical design grooves 5 and the vertical design grooves 2 were alternately arranged at a pitch of 62.5 mm. The first horizontal design grooves 7 are arranged at positions that divide the vertical side 11 into 12 equal parts, and the second horizontal design grooves 8 are arranged at positions that divide the space between adjacent first horizontal design grooves 7 and the space between each horizontal side 12 and the first horizontal design groove 7 adjacent to the horizontal side 12 into 3 equal parts, and the horizontal design grooves 6 are arranged at a pitch of 26.9 mm at positions that divide the vertical side 11 into 36 equal parts. The first vertical design groove 3 has a bottom width of 12 mm and a depth L3 = 10 mm. The second vertical design groove 4 has a bottom width of 12 mm and a depth L4 = 10 mm, and the depth of the top surface that is the reference for the convex part 41 is L41 = 6 mm, and the convex parts 41 are arranged randomly so that the ratio of the bottom to the convex parts 41 is about 6:4. The intermittent vertical design groove 5 has a bottom width of 12 mm and a depth L5 = 10 mm, and a top surface depth L51 = 6 mm which is the reference for the protrusions 51, and the protrusions 51 and the areas interrupted by the block portions 15 are randomly arranged so that the ratio of the bottom of the intermittent vertical design groove 5 to the protrusions 51 and the areas interrupted by the block portions 15 is approximately 3:3:4. The first horizontal design groove 7 has a bottom width of 10 mm and a depth L7 = 10 mm, and the height L71 of the step portion 71 is 1.5 mm. The second vertical design groove 8 has a bottom width of 7 mm and a depth L8 = 10 mm, a top surface depth L81 = 8.5 mm which serves as the reference for the low convex portion 81, a top surface depth L82 = 6 mm which serves as the reference for the medium convex portion 82, and a top surface depth L83 = 3 mm which serves as the reference for the high convex portion 83, and the low convex portions 81, medium convex portions 82, and high convex portions 83 are randomly arranged so that the ratio of the bottom of the second vertical design groove 8 to the low convex portions 81, medium convex portions 82, and high convex portions 83 is approximately 1:1:3:5.

[0038] In this way, the surface of the exterior wall panel 1 is divided by the vertical design grooves 2, the intermittent vertical design grooves 5, and the horizontal design grooves 6 provided on the surface of the exterior wall panel 1, and horizontally long small divided block sections 16 are arranged vertically and horizontally in a matrix pattern, in which the horizontal length is the distance between adjacent intermittent vertical design grooves 5 and vertical design grooves 2, which are provided at a pitch of 62.5 mm when viewed from the front, and the vertical length is the distance between adjacent vertical design grooves 6, which are provided at a pitch of 26.9 mm when viewed from the front, and block sections 15, in which the horizontal length is the distance between adjacent vertical design grooves 2, which are provided at a pitch of 125 mm when viewed from the front, and the vertical length is the distance between adjacent vertical design grooves 6, which are provided at a pitch of 26.9 mm, are randomly arranged in places to form a small divided pattern, which serves as the surface design of the exterior wall panel 1. In the exterior wall panel 1, the block parts 15 are randomly arranged among the divided block parts 16 arranged in a matrix, which reduces the orderly artificial impression and enhances the design of the exterior wall panel 1, and the second vertical design groove 4, the intermittent vertical design groove 5, and the second horizontal design groove 8, which are grooves with unevenness formed at the bottom, enhance the texture of the exterior wall panel 1, resulting in a highly designed appearance. In the exterior wall panel 1 in Fig. 5, erosion parts and collapsed parts are randomly provided on the upper surfaces and corners of the block parts 15 and the divided block parts 16, and erosion parts and collapsed parts are also randomly provided on the upper surfaces and corners of the convex parts 41 of the second vertical design groove 4, the convex parts 51 of the intermittent vertical design groove 5, the low convex parts 81, the medium convex parts 82, and the high convex parts 83 of the second horizontal design groove 8, thereby forming an exterior design with improved texture that is closer to the texture of natural stone.

[0039] By constructing the exterior wall structure 100 using the exterior wall panel 1 of Fig. 5, as shown in Fig. 6, it is possible to form an exterior wall design with a small pattern in which the vertical joints 110 and horizontal joints 120 formed between the exterior wall panels 1 are not noticeable. As shown in Fig. 6(a), in a close-up view of the exterior wall structure 100, although numerous vertical design grooves 2 and horizontal design grooves 6 are provided, it has a highly textured appearance, and as shown in Fig. 6(b), in a distant view away from the exterior wall structure 100, the small pattern looks like a non-adjusted pattern, and furthermore, the vertical joints 110 and horizontal joints 120 formed between the exterior wall panels 1 are not noticeable, so that the entire exterior wall surface is seamless and connected, creating a beautiful appearance as a whole, and it is possible to create an appearance with a high design in both close-up and distant views. [Explanation of symbols]

[0040] 1. Exterior wall panels 11 Vertical Side 12 Horizontal side 15 Block section 16 Split block section 2 Vertical design groove 3 First vertical design groove 4. Second vertical design groove 41 Convex 5 Intermittent vertical groove 51 Convex 6 Horizontal design groove 7 First horizontal design groove 71 Step 8 Second horizontal design groove 81 Low convex part 82 Middle convex part 83 High convex part 100 External wall structure

Claims

1. An exterior wall panel formed in a rectangular shape when viewed from the front, the edges of which are a pair of vertical sides that are parallel to each other and extend in a vertical direction and a pair of horizontal sides that are parallel to each other and extend in a horizontal direction perpendicular to the pair of vertical sides, A plurality of vertical design grooves extending continuously between the pair of horizontal sides in parallel with the vertical sides on the surface; A plurality of continuous grooves extending on the surface between the pair of vertical sides in parallel with the horizontal sides A horizontal design groove is provided. The plurality of vertical design grooves are A first vertical design groove having a flat bottom; A second vertical design groove having a convex portion at a bottom portion; It is composed of The plurality of horizontal design grooves are A first horizontal design groove having a flat bottom; A second horizontal design groove having a convex portion at a bottom portion; It is composed of The first vertical design groove and the second vertical design groove are alternately arranged, The exterior wall panel is characterized in that the second horizontal design groove has low convex portions, medium convex portions, and high convex portions that rise to different heights and have eroded portions and collapsed portions randomly provided on the upper surface and corners.

2. The vertical design grooves are disposed at positions that equally divide the horizontal side into at least four or more even numbers, 2. The exterior wall panel according to claim 1, wherein the vertical design groove arranged adjacent to the vertical side is the second vertical design groove.

3. 3. The exterior wall panel according to claim 1, wherein the horizontal design groove is formed shallower than the first vertical design groove at an intersection with the first vertical design groove.

4. The exterior wall panel according to any one of claims 1 to 3, further comprising an intermittent vertical design groove extending intermittently between the pair of horizontal sides parallel to the vertical sides on the surface.

5. An exterior wall structure comprising a plurality of exterior wall panels according to any one of claims 1 to 4 arranged in parallel in the horizontal direction, and a sealing material is filled between each adjacent exterior wall panel to form a sealing joint groove.

Images