Exterior wall panel connection structure

Abstract

To provide a connection structure of an exterior wall panel which is usable as an exterior wall as it is without requiring finishing after concrete placing, and can prevent rainwater from intruding from a connection part between adjacent panels in a height direction.SOLUTION: A connection structure of exterior wall panels 1 and 1 is such a structure as to connect the exterior wall panels 1 in a height direction through a connection member 4, has connection members 4 mounted on a lower end of the exterior wall panel 1 on the upper stage side so that an erection part 41 extending upward is included or spliced with a back face, has a downwardly inclined lead-out part 42 projecting to the surface side from the middle of the erected part 41, and has a discharge part 43 having a flashing part 431 extending downward, and has a connection material 6 along the back faces of the erected part 41 and the lead-out part 42 of the connection member 4 arranged and connected between the adjacent connection members 4, 4 in a lateral direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a connection structure for exterior wall panels that can be used as an exterior material as is without the need for finishing after pouring concrete, and that can prevent rainwater from entering through the connection parts between adjacent panels in the vertical direction (up and down). [Background technology]

[0002] Conventionally, when constructing concrete structures, dual-purpose formwork has been proposed in which exterior materials or base materials (insulating materials) are used as formwork. In most of these, the insulating material is used as the formwork, and finishing processes (applying decorative materials and laying exterior materials) are carried out on the surface of the insulating material after the concrete has hardened.

[0003] Patent Document 1 discloses a method of pouring concrete using a dual-purpose insulation panel A having a configuration in which a thermal insulation material 6 and a composite reinforcing material 7 are integrated together. However, in this Patent Document 1, the form fastening metal fittings, Formtie (registered trademark) 3 and separator 5, penetrate the heat insulating material 6 and reinforcing material 7 and protrude to the surface (outside) of the reinforcing material 7, so there was a problem that slag (cement water) leaked from the through holes. In addition, this slag is a strong alkali and stains the outer surface of the reinforcing material 7, so it was necessary to wipe off the slag after hardening and cover the outer surface of the reinforcing material 7 with a finishing material (interior board 11). Furthermore, in order to hold down the dual-purpose formwork with the reinforcing material 7, work had to be done from the outside of the dual-purpose heat insulating material panel A, which required space for setting up scaffolding, making construction on a narrow site (such as when there is not enough space between the neighboring house). There was also a problem that the decorative finishing after hardening was difficult to work on a narrow site.

[0004] Moreover, Patent Document 2 discloses an external heat-insulating wall for a building in which a cement-based hard material 4 with tiles 3 serving as a finishing material integrated therewith is joined to a heat-insulating material 2 . However, in Patent Document 2, as shown in the figure, the bolts and nuts of the anchor member 5, the ends of the separator, and the like are exposed on the surface of the finishing material 3, which is undesirable from the design point of view. To solve this, a process similar to that of Patent Document 1 was required.

[0005] Therefore, the applicants of the present application have proposed, in Patent Documents 3 to 5, panels that can also serve as formwork, which can prevent slag from leaking out from the joints. These formwork panels are constructed by placing an exterior finishing material along a vertically long insulating material, with a piece to be polymerized on one of the connecting parts at both ends and a polymerizing piece on the other, and with the adjacent polymerizing piece polymerized on the piece to be polymerized, the rod-shaped member can be screwed from the back side of the insulating material into the screw part of the fixing part provided on the inside of the face plate to connect them. Therefore, adjacent formwork panels can be easily connected, and it is also possible to prevent sludge from leaking from the connecting parts (fixing parts) between the panels, and there is no need to wipe off the exterior finishing material, so it can be used as an exterior material as it is. In addition, a space is provided on the back side of the panel portion and an anchoring material having a screw portion is attached into the space to form the anchoring portion, so that even if sludge infiltrates into the anchoring portion from the concrete pouring space by traveling down the rod-shaped member, this space prevents the sludge from leaking out onto the surface of the panel portion.

[0006] Furthermore, when connecting exterior wall panels in the height direction, a drip-proof material as shown in Patent Document 6 is used to connect the panels and prevent rainwater, etc. from blowing in from the ends (lower or upper ends) of the exterior wall panels. However, in most cases, thin metal plates are bent and connected in the longitudinal direction by overlapping. However, while overlapping connections (joints) are easy to install, they have problems such as poor appearance and the risk of rainwater getting around. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Special Publication No. 7-6244 [Patent Document 2] Japanese Patent Application Publication No. 11-315601 [Patent Document 3] JP 2013-133656 A [Patent Document 4] JP 2013-19243 A [Patent Document 5] JP 2013-2204 A [Patent Document 6] JP 2012-229565 A Summary of the Invention [Problem to be solved by the invention]

[0008] As mentioned above, the formwork panels described in Patent Documents 1 and 2 require tedious processing and finishing work after pouring the concrete, and therefore cannot be used as exterior or interior materials as they are. It was also easy to imagine that slag would leak out from the connections and the butt joints of the cross-section materials, and that, as mentioned above, it would be necessary to wipe off the slag after it hardened or to cover the outer surface of the facing material with a finishing material.

[0009] In the formwork panels described in Patent Documents 3 to 5, slag that seeps through left-right connections and separators, etc., can flow downward within the space without flowing out onto the surface of the exterior material, but there is no mention of connections in the vertical direction (up-down direction). When connecting adjacent panels in the vertical direction (up and down direction), a method is generally adopted in which a flashing (connecting member) is provided to prevent rainwater flowing over the surface of the exterior material from flowing onto the back surface of the exterior material of the lower level. This flashing is formed into a roughly horizontal Z-shape, with one end located inside the panel (inside the insulation material) and the other end located on the surface of the exterior material of the lower level, thereby preventing rainwater flowing down the surface of the exterior material from flowing onto the back surface of the exterior material of the lower level at the connection part. However, in the case of formwork-combined panels as in Patent Documents 3 to 5, even if such a drain is used, the slag in the storage space flows out onto the exterior material surface through the drain, and adheres to the exterior material surface below the drain, necessitating wiping work.

[0010] Therefore, the present invention aims to propose a connection structure for exterior wall panels that can be used as an exterior material as is without the need for finishing after pouring the concrete, and that can prevent rainwater from entering through the connection parts between adjacent panels in the vertical direction (up and down). [Means for solving the problem]

[0011] The present invention has been proposed in view of the above, and relates to a connection structure for connecting exterior wall panels in the height direction via a connection member, the connection member being attached to the exterior wall panel on the upper stage side so that an upwardly extending standing portion is included within or attached to the back surface, a downwardly sloping lead-out portion is protruded from the middle of the standing portion toward the front surface side, and a drainage portion equipped with a water return at the lower end is further extended downward, and the connection members adjacent to each other in the left-right direction are connected by arranging a connecting material along the rear surfaces of the standing portion and the lead-out portion of the connection member. The connecting member has a prevention piece formed at the upper end thereof for preventing the connecting member from being caught in either the left or right connecting member. The present invention relates to a connection structure for exterior wall panels, characterized in that the connection structure is

[0012] The present invention also proposes a connection structure for exterior wall panels, characterized in that in the connection structure, the connecting material is engaged between the corner formed by the upright portion and the lead-out portion of the connecting member and the water return.

[0014] The present invention also proposes a connection structure for exterior wall panels, characterized in that, in the connection structure, the exterior wall panel comprises a back material and an exterior material, the exterior material has a storage space continuous in the longitudinal direction, on the back side of which ends of fastening members constituting a spacing retaining member as a formwork can be stored, the rising portion of the connection member is contained within or attached to the back surface of this exterior wall panel, and the lead-out portion is positioned so as to protrude toward the front surface side from the opposing portions of the exterior wall panels adjacent in the height direction.

[0015] The present invention also proposes a connection structure for exterior wall panels, characterized in that in the above connection structure, the storage space for the exterior material is disposed in a recess in the back surface material.

[0016] The present invention also proposes a connection structure for exterior wall panels, characterized in that in the connection structure, the storage space for the exterior material is formed in a protruding shape on the back side of the exterior material. Effect of the Invention

[0017] The connection structure of the exterior wall panels of the present invention connects the exterior wall panels in the height direction via the connection members, and rainwater flowing down the exterior surface can be reliably discharged to the surface side of the exterior material along the inclination of the outlet part of the connection member without being retained on the connection member, and can further flow down along the outlet part. This exterior wall panel can also be used as a formwork panel. In this case, finishing after pouring concrete is not required, and it can be used as an exterior material as it is. In other words, slag does not adhere to the surface of the exterior material, so there is no need for post-processing such as wiping off the slag. Furthermore, since connecting members are interposed between the end faces of adjacent exterior wall panels in the vertical direction, the design of the connections (joints) between the panels is improved. In particular, the connecting members are connected in series (butt-jointed) in the left-right direction by the connecting material, so that the action of the connecting members can be exerted in the length direction without being involved in the connection between the exterior panels. Also, the joints (outlet and outlet parts) of the connecting members connected in the left-right direction by the connecting material are flat, improving the design. In this way, in the connection structure of the exterior wall panels of the present invention, rainwater, etc. flowing down the exterior surface is reliably guided along the slope of the guide portion of the connecting member to the surface side of the exterior material, and further reliably flows down along the discharge portion. Furthermore, since the connecting material has a prevention piece formed at its upper end for preventing the connecting material from becoming embedded in either of the connecting members adjacent in the left-right direction, the connecting members adjacent in the left-right direction can be stably connected.

[0018] Furthermore, when the connecting material is engaged between the corner formed by the upright portion and outlet portion of the connecting member and the water return, the upper end of the connecting material can be engaged with the corner, and the lower end of the connecting material can be engaged with the water return, and by aligning the intervening portion between them with the back surface of the outlet portion and the back surface of the discharge portion of the connecting member (bringing them in close contact in a superimposed state), the connecting material can be more stably attached in an engaged state and the connecting members can be more stably connected.

[0020] In addition, the exterior wall panel is made up of a back material and an exterior material, and the exterior material has a storage space that is continuous in the longitudinal direction and can store the ends of the fastening members that constitute the spacing retaining members as a formwork on its back side. When the upright portions of the connecting members are contained within or attached to the back surface of this exterior wall panel and when an outlet portion is positioned so as to protrude toward the front surface side from the opposing portions of the exterior wall panels adjacent in the height direction, rainwater and the like that reaches the portion where the upright portions are contained within or attached can be reliably guided to the front surface side by the outlet portion and discharge portion.

[0021] Furthermore, when the storage space of the exterior material is placed in a recess in the back surface material, the box-like portion forming the storage space is protected within the recess without deformation, etc., and slag can flow downward without flowing sideways, etc.

[0022] When the storage space of the exterior material is formed in a protruding manner on the back surface side of the exterior material, the front surface side of the exterior material appears approximately flat, resulting in excellent design. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1A is an oblique view showing a state in which a connecting member used in one embodiment (Example 1) of the present invention is connected in the left-right direction using a connecting material; FIG. 1B is an oblique view showing a state in which a connecting material is attached to one connecting member and the other connecting member is facing it; and FIG. 1C is an oblique view showing the connecting members and the connecting material before being assembled. [Diagram 2] FIG. 1A is a side cross-sectional view showing the connection portion (with the connecting member of the connecting member omitted) of the end portion of the panel when the exterior wall panel in Example 1 is installed in the height direction (up and down direction), and FIG. 1B is an oblique view showing the connection portion in the longitudinal direction (left and right direction) of the connecting member used. [Diagram 3] FIG. 2 is a perspective view showing the upper end portion of the lower exterior wall panel (with the connecting member of the connection member omitted). [Figure 4](a) is a front cross-sectional view showing a state (Example 2) in which two different types of connecting members are connected in the left-right direction using a connecting material different from Example 1; (b) is a front cross-sectional view showing a state in which the connecting members in Example 3 are connected in the left-right direction using a connecting material; (c) is a side cross-sectional view thereof; and (d) is a side cross-sectional view of a portion where no prevention piece is present. [Diagram 5] (a) A side cross-sectional view showing the connection part between the exterior wall panel and the foundation of a building in Example 4 (the connecting material of the connecting member is omitted), (b) a side view showing the connecting member used, (c) a side view showing the connecting material, (d) a side view showing the connecting material assembled to the connecting member, and (e) a side view showing the configuration of the prevention piece of the connecting material. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] The connection structure of the exterior wall panels of the present invention is a connection structure that connects exterior wall panels in the height direction via a connection member, and the connection member is attached to the exterior wall panel on the upper stage side so that the rising portion extending upward is included or attached to the back surface, a downwardly sloping lead-out portion protrudes from the middle of the rising portion to the front surface side, and a discharge portion equipped with a water return at the lower end extends downward, and the connection members adjacent in the left-right direction are connected by arranging a connecting material along the rising portion of the connection member and the back surface of the lead-out portion. The connecting member has a prevention piece formed at the upper end thereof for preventing the connecting member from being caught in either the left or right connecting member. It is characterized by the fact that

[0025] The exterior wall panel used in the present invention may have a configuration similar to that of the formwork panel described in the above Patent Documents 3 to 5, except for the connecting members described later. That is, the exterior material may have a configuration in which the end of the fastening member serving as a formwork can be stored on the back surface side and a storage space continuous in the longitudinal direction can be provided, similar to the exterior material in the formwork panel described in the above Patent Documents 3 to 5. For example, two types of exterior materials (four in total), two of each, may be attached (bonded) to the surface of one back surface material to be integrated. In addition, the present invention is not limited to the formwork panels described in Patent Documents 3 to 5 or the illustrated examples described later, and may be various types of molded products, such as ceramic-based, cement-based, concrete-based such as ALC, or metal-based molded products, or composite materials laminated with functional materials such as non-combustible and heat-insulating materials, and is not particularly limited. The integration of the exterior wall panels may be by engagement or polymerization. That is, it is preferable that the exterior materials can be connected to each other by engagement, fitting, or polymerization, and it is preferable that the backing materials can be connected to each other by polymerization. The storage space may be formed in a generally U-shape with the sides or back side open, or in a generally L-shape (enclosed shape), and these are collectively referred to as a box shape. The storage space is preferably disposed in a recess in the backing material. The recess may be a recess that is formed in a concave shape when laid down or may be a recess that is formed in advance. The recess and the storage space in the backing material are continuous from top to bottom, so that the slag flows downward without flowing sideways.

[0026] The configuration of the exterior wall panel of the present invention, which differs from the formwork panels in the above-mentioned Patent Documents 3 to 5, is that it has a portion extending from the lower end of the exterior material and into which the upright portion of the connecting member is enclosed or attached. The portion may be formed from the lower end upward like the insertion space in the illustrated embodiment described later, or may be formed at the boundary between the back surface material and the exterior material. That is, the portion may be formed with a constant width from the lower end or upper end of the box-like portion forming the storage space, may be formed as a tapered recess, or may be formed as a slit in the wall portion forming the storage space along the back surface of the exterior material.

[0027] The connecting member used in the present invention, as described above, has an upright section that is enclosed in the upper panel or attached to the back surface, a downwardly sloping outlet section that protrudes from the middle of the upright section toward the front surface, and a drain section equipped with a water return at its lower end that extends downward. This connecting member reliably guides rainwater flowing down the exterior surface to the front surface without stagnation, and also prevents the infiltration of rainwater into the back surface of the exterior material of the lower panel.

[0028] The lead-out portion is a portion extending from the opposing portion of adjacent panels in the height direction (vertical direction) toward the front side and downward, and is inclined downward from the middle of the standing portion, so that rainwater, etc. that reaches the portion where the standing portion is contained or attached can be reliably drained down through the lead-out portion and the discharge portion, as described above. Note that, as shown in the illustrated embodiment described later, the downwardly inclined clamped portion sandwiched between the opposing space between the upper panel and the lower panel corresponds to this lead-out portion. Therefore, this connection member can be disposed so as to straddle the upper end of the lower panel, and can be stably attached. Furthermore, since this lead-out portion extends from the middle of the standing portion at a downward angle toward the front surface, a corner is formed on the back surface side by the standing portion and the lead-out portion, which serves as a portion where the upper end of the connecting material is engaged.

[0029] In addition, the water return provided at the lower end of this discharge portion is formed in a folded shape that turns inward. It is desirable that the lower end of the connecting material can be engaged with this water return. In other words, since the upper end of the connecting material is engaged with the corner formed by the rising part and the lead-out part as described above, the connecting material can be attached in an engaged (fitted) manner by engaging the lower end with this water return. In addition, since this water return refers to a piece formed in a folded shape as shown in the illustrated embodiment described below, it is correct to say that the lower end of the connecting material is engaged with the corner formed between the water return and the discharge portion, but in embodiments other than this one, it is written that the lower end of the connecting material is engaged with the water return.

[0030] The connecting member attached between adjacent connecting members in the left-right direction is a member that connects the connecting members in series in the left-right direction and plays a role in extending the action of the connecting members in the length direction. As described above, this connecting member can be attached in an engaged (fitted) manner by being engaged at its upper end with the corner formed by the standing part and the outlet part and at its lower end with the water return. Furthermore, when the intermediate portion from the upper end to the lower end is formed in a curved shape that fits along the back surface of the outlet part and the discharge part of the connecting member as in the illustrated embodiment described later, it can be attached in an engaged manner more stably. It is desirable that the connecting material has a preventive piece formed at the upper end to prevent the connecting material from penetrating into either of the connecting members adjacent in the left-right direction. In this case, the connecting materials adjacent in the left-right direction can be stably connected. In other words, if this preventive piece is not provided, the connecting material will penetrating into either of the left and right connecting members, making it impossible to connect the connecting members in the left-right direction.

[0031] The connection structure of the exterior wall panels of the present invention is formed by integrating exterior wall panels of the above-mentioned configuration adjacent to each other in the vertical direction (up and down direction) via a connecting member of the above-mentioned configuration, and rainwater flowing down the exterior surface or rainwater that reaches the portion where the raised portion is contained or attached can be reliably discharged to the surface side of the exterior material along the slope of the outlet portion of the connecting member, and can further flow down along the outlet portion. In this way, in the present invention, rainwater flowing down the exterior surface or rainwater that reaches the part where the raised portion is contained or attached is reliably conducted to the surface side of the exterior material along the downward slope of the outlet portion of the connecting member, and then reliably flows down along the discharge portion. Furthermore, when a connecting material is engaged between the water return and the corner formed by the upright portion and the outlet portion of the connecting member, adjacent connecting members in the left-right direction can be stably connected.

[0032] As in the illustrated embodiment described later, the exterior wall panel is made up of a back material and an exterior material, and the back surface of the exterior material is capable of storing ends of the fastening members that constitute the spacing retaining members as a formwork, and has a storage space that is continuous in the longitudinal direction. A portion is formed from the lower end of this exterior wall panel into which the upright portion of the connecting member is contained or attached. When the upright portion of the connecting member is contained or attached in this portion (= an insertion space in the illustrated embodiment described later) and the lead-out portion is positioned so as to protrude toward the front surface side from the opposing portions of the exterior wall panels adjacent in the height direction, rainwater and the like that reaches the portion into which the upright portion of the connecting member is contained or attached can be reliably led to the front surface side. EXAMPLES

[0033] Example 1 of the present invention is a structure in which exterior wall panels 1, which can be used as formwork for pouring concrete and can be used as exterior materials as they are after use, are connected in the vertical direction via connecting members 4 consisting of an upwardly extending standing portion 41, an outlet portion 42 that protrudes from the middle of the standing portion 41 at a downward angle toward the surface, and an outlet portion 43 that extends downward and has a water return 431 at its lower end, and the connecting members 4, 4 adjacent to each other in the left-right direction are connected by means of connecting materials 6 that are arranged along the back surfaces of the standing portion 41 and outlet portion 42 of the connecting members 4. As shown in Figures 2(a) and 3, the exterior wall panel 1 is composed of a backing material 3, which is an insulating material, and an exterior material 2, and the strip-shaped material indicated by the reference numeral 5 in the figures is a connecting plate material that is fitted into an insertion groove 32 formed on the vertical end face of the backing material 3.

[0034] 1(c), the connection member 4 is formed into a substantially H-shape with a standing portion 41, an outlet portion 42, and a discharge portion 43, and is connected in series (butted) in the left-right direction by a connecting member 6 formed into a shape without any vertical portion of the H-shape. That is, the connection members 4, 4 face each other (butted) via the connecting member 6. Therefore, the connections (outlet portions 42, 42 and discharge portions 43, 43) of the connection members 4, 4 connected in the left-right direction by the connecting member 6 are flat without any steps, improving the design. The upright portion 41 of the connecting member 4 is a portion that is contained within the insertion space 31A formed in the upper exterior wall panel 1, and prevents rainwater from flowing from the lower end of the exterior wall panel 1 (the upper and lower joints of the panels) to the back side. The outlet portion 42 of this connecting member 4 protrudes from the middle of the upright portion 41 toward the surface at a downward angle, so that rainwater and the like can be discharged more smoothly without accumulating, compared to the case where it protrudes perpendicularly, for example. Further, the discharge portion 43 of the connection member 4 is provided with a water return 431 formed in a folded shape at the lower end so that the lower end 612 of the connecting material 6 can be engaged therewith.

[0035] Furthermore, the front surface of this connection member 4 is formed continuously from a vertical standing portion 41 to an inclined lead-out portion 42 and further to a vertical discharge portion 43, and the back surface portion is formed by the back surface of the standing portion 41, which is a vertical surface. As shown in FIG. 1(b), the portion formed on the back surface side by the standing portion 41 and the lead-out portion 42 is a corner portion 44, and the portion formed on the back surface by the discharge portion 43 and the water return 431 is a corner portion 45, so that the connecting material 6 can be attached between the corner portions 44, 45 in an engaging manner. The standing portion 41 extends vertically further downward from the middle, i.e., from the base end of the lead-out portion 42, and the lower portion 411 of the standing portion 41 has a cutout at the portion (end 410) located on the adjacent edge in the left-right direction.

[0036] The connecting member 6 is a member attached between adjacent connecting members 4, 4 in the left-right direction as shown in Fig. 1(a), and connects the connecting members 4, 4 in series in the left-right direction. The connecting member 6 can be attached in an engaged (fitted) manner by having an upper end 611 engaged with a corner 44 formed by the upright portion 41 and the lead-out portion 42, and a lower end 612 engaged with a corner 45, and further, as shown in Fig. 1(c), an intermediate portion 61 from the upper end 611 to the lower end 612 is formed in an inclined shape along the back surface of the lead-out portion 42 and the discharge portion 43 of the connecting member 4, so that the connecting member 6 is stably attached in an engaged manner so as to be in close contact with the back surface of the connecting member 4.

[0037] The connecting member 6 has a prevention piece for preventing the connecting member 6 from being caught in any of the connecting members 4, 4 adjacent in the left-right direction. 62 is formed at the upper end, the connecting members 4, 4 adjacent to each other in the left and right direction can be stably connected. If this prevention piece 62 was not provided, the connecting material 6 would sink into either the left or right connecting members 4, 4, making it impossible to connect the connecting members 4, 4 in the left-right direction.

[0038] In order to connect the connection members 4, 4 in series in the left-right direction via the connecting member 6 using these connection members 4 and connecting member 6 as shown in Fig. 1(a), first, the connection members 4 and the connecting member 6 are arranged in parallel as shown in Fig. 1(c), and then the connecting member 6 is inserted into one of the connection members 4 as shown in the back side of Fig. 1(b). In this state, the connecting member 6 is attached in an engaged manner between the corners 44, 45 of the connection member 4, and the side edge (the back end in the figure) of the prevention piece 62 of the connecting member 6 abuts against the upper edge (the front end in the figure) of the lower part 411 of the notched end 410 of the connection member 4. Therefore, in Fig. 1(b), the connecting member 6 is disposed inside the connection member 4 in approximately the back half, and the connecting member 6 is exposed from the end of the connection member 4 in approximately the front half. Thereafter, the other connection member 4 is brought in from the front side as shown in Fig. 1(b) to obtain the connection state shown in Fig. 1(a). In this case as well, the exposed portion of the linking material 6 attached to one connection member 4 is slid in such a way that it is attached in an engaged state between the corners 44, 45 of the new connection member 4.

[0039] The exterior material 2 constituting the exterior wall panel 1 has a configuration in which the end (head) of the fastening member constituting the spacing retaining member (not shown) serving as a formwork can be stored on the back surface side, and has a configuration continuous in the longitudinal direction, and has a configuration substantially similar to that of the exterior material used in the formwork panel described in the above Patent Documents 3 to 5, except for the configuration of the connection member 4. The heat insulating material in this formwork panel corresponds to the back surface material 3 in the present invention. The front side of this back surface material 3 may be configured such that, for example, two exterior materials on each side are attached (glued) together to form a total of four exterior materials, and a recess may be formed in approximately the center of the front side of the back surface material 3, and a storage space 25 for the exterior material 2 may be located in this recess. In addition, in this Example 1, the lower end of the exterior material 2 is processed to follow the slope of the lead-out portion 42 of the connecting member 4, thereby improving the design and making it difficult for rainwater to blow in and flow around to the back side.

[0040] As shown in Figures 2(a) and 3, the exterior wall panel 1 has an insertion space 31A formed therein extending inward from the upper and lower ends of the exterior material 2, respectively, and the tip of this insertion space 31A is connected to the storage space 25. In addition, an insulating material is arranged on the back side of this exterior material 2 as a back surface material 3, and in the illustrated embodiment, a stepped portion is formed on the back side of the insertion space 31A by cutting out the front surface end portion of the back surface material 3, and the insertion space 31A is formed between this stepped portion and the exterior material 2, and the insertion space 31A is configured to contain the upright portion 41 of the connecting member 4.

[0041] The connection structure of the exterior wall panel 1 of this Example 1 is one in which the exterior wall panels 1, 1 are connected in the height direction (up and down direction) via the connection member 4, and rainwater flowing down the exterior surface can be reliably discharged to the surface side of the exterior material 2 along the inclination of the lead-out part 42 of the connection member 4 without being retained on the connection member 4, and can further flow down along the discharge part 43. In addition, this exterior wall panel 1 can also be used as a formwork panel. In this case, finishing after pouring concrete is not required, and it can be used as an exterior material as it is. In other words, slag does not adhere to the surface of the exterior material, so there is no need for post-processing such as wiping off the slag. Furthermore, since the connecting member 4 is interposed between the end faces of the exterior wall panels 1, 1 adjacent in the height direction, the design of the connection (joint portion) between the exterior wall panels 1, 1 is improved. In particular, the connection members 4 are connected in series in the left-right direction by the connecting members 6, and therefore the action of the connection members 4 described above can be exerted in the length direction without being involved in the connection between the exterior panels 1, 1. In addition, the connections (the lead-out portions 42, 42 and the discharge portions 43, 43) of the connection members 4, 4 connected in the left-right direction by the connecting members 6 are flat without any steps, improving the design. Rainwater flowing down the exterior surface is reliably guided along the downward slope of the guide portion 42 of the connecting member 4 to the surface side of the exterior material 2, and further reliably flows down along the discharge portion 43. EXAMPLES

[0042] 4(a) is a plan view showing a state in which different connection members 4, 4II are connected in the left-right direction by a connecting member 6II different from that in Example 1. The connection member 4II not used in Example 1 is exactly the same as the connection member 4 in Example 1, except that the lower part 411 of the standing part 41 is not cut out even in the parts located on the left-right adjacent edges. The connecting material 6II is entirely the same as the connecting material 6 in the first embodiment, except that the prevention piece 62ii is formed to be about half the size of the prevention piece 62 of the connecting material 6 in the first embodiment. EXAMPLES

[0043] The connecting member 4III shown in Figures 4(b) and (c) is exactly the same as the connecting member 4 in Example 1, except that the lead-out portion 42iii and the discharge portion 43iii are connected in a gentle arc rather than in an angular shape, and the connecting material 6III is also formed in the same way. Therefore, the rest of the components are given the same reference symbols and their explanations are omitted. The connection member 4 shown in FIG. 4(d) is the connection member 4 and the linking material 6 in Example 1 shown for comparison, and shows a cross section of a portion where no prevention piece 62 is present. EXAMPLES

[0044] Example 4 shown in Figure 5(a) can be used as a formwork for pouring concrete like Example 1, and can be used as an exterior material as is after use. This structure connects exterior wall panels 1 adjacent to each other vertically and also in the left-right direction via connecting members 4IV consisting of an upright portion 41iv, an outlet portion 42iv, and a discharge portion 43iv, and the connecting members 4IV, 4IV adjacent to each other in the left-right direction, are connected by disposing a connecting member 6IV along the back surface of the upright portion 41iv and the outlet portion 42iv of the connecting member 4IV.

[0045] In the above-mentioned Example 1, the insertion space 31A containing the upright portion 41 of the connecting member 4 was an insertion groove 35 that was capable of storing the end (head) of the fastening member that constitutes the spacing retaining member as a formwork not shown and was connected to the storage space 25 that was continuous in the longitudinal direction, but in this Example 4, the difference is that the insertion space 31B containing the upright portion 41iv of the connecting member 4IV is an insertion groove 32 formed for fitting in a strip-shaped connecting plate material 5. Furthermore, since the insertion space 31B (fitting groove 32) in this embodiment 4 is located deeper (farther) from the surface than the insertion space 31A (=insertion groove 35) in embodiment 1, the width, length and shape of the lead-out portion 42iv are formed differently from those of the lead-out portion 42.

[0046] The connecting member 4IV in this embodiment 4 comprises an upright portion 41iv formed in a short vertical piece as shown in Figure 5(b), an outlet portion 42iv formed in a wide downward sloping shape, and an outlet portion 43iv formed in a vertically long piece with a folded-back piece-like water return 431iv at its lower end.The connecting material 6IV arranged on the back side thereof also has an intermediate portion 61iv formed in a wide downward sloping shape between its upper end 611iv and lower end 612iv as shown in Figure 5(c).

[0047] As shown in Figure 5 (d), these connecting members 4IV and linking members 6IV can be engaged with an upper end 611iv of the connecting member 6IV in a corner 44iv formed by the upright portion 41iv and the lead-out portion 42iv of the connecting member 4IV, and with a lower end 612iv of the connecting member 6IV in a corner 45iv formed at the lower end of the lead-out portion 43iv, and further, the intervening portion 61iv therebetween is closely aligned with the rear surface of the lead-out portion 42iv and the rear surface of the lead-out portion 43iv of the connecting member 4IV, so that adjacent connecting members 4IV, 4IV on the left and right are stably connected, similar to the above-mentioned Example 1. In addition, Figure 5 (e) shows that the formed prevention piece 62iv may be any semicircular shape other than vertical, and it may be formed in any manner as long as the side edge of this prevention piece 62iv can abut against the end edge of the connecting member (not shown).

[0048] The connection structure of the exterior wall panel 1 of Example 4 connects the exterior wall panel 1 to the foundation of a building via a connection member 4IV, and rainwater, etc. flowing down the exterior surface can be reliably discharged to the surface side of the exterior material 2 along the inclination of the lead-out portion 42iv of the connection member 4IV, and can further flow down along the discharge portion 43iv. Furthermore, this exterior wall panel 1 can also be used as a form panel, and in that case, rainwater, etc. reliably discharged to the surface side of the exterior material 2 can be easily wiped off. In particular, since the connecting members 4IV are connected in series in the left-right direction by the connecting members 6, the action of the above-mentioned connecting members 4IV can be exerted in the longitudinal direction without being involved in the connection between the exterior panel 1 and the foundation 7 of the building. Rainwater or the like flowing down the exterior surface is reliably guided to the surface side of the exterior material 2 along the downward slope of the guide portion 42iv of the connecting member 4IV, and further reliably flows down along the discharge portion 43. [Explanation of symbols]

[0049] 1. Exterior wall panels 2 Exterior materials 3 Backing material 31A Insertion space (insertion groove) 31B Insertion space (fitting groove) 4,4II~4IV Connection parts 41,41iv Standing part 42,42iv Derivation part 43,43iv Discharge section 44,44iv,45,45iv corner 5 Connection plate material 6,6II~6IV Connecting material 62 Prevention piece 7. Foundations of Buildings

Claims

1. A connection structure for connecting exterior wall panels in a height direction via a connecting member, The connecting member is attached to the upper exterior wall panel so that the upwardly extending upright portion is included or attached to the back surface, and a downwardly sloping lead-out portion is protruded from the middle of the upright portion toward the front surface side, and a drain portion equipped with a water return at the lower end is further extended downward, A connection structure for exterior wall panels, characterized in that adjacent connection members in the left-right direction are connected by a connecting material that is arranged along the back surfaces of the upright portion and the lead-out portion of the connection member, and the connecting material has a prevention piece formed at its upper end to prevent it from sinking into either the left or right connection member.

2. 2. The connection structure of exterior wall panels according to claim 1, wherein the connecting material is engaged between the corner formed by the upright portion and the lead-out portion of the connecting member and the water return.

3. The connection structure of exterior wall panels described in claim 1 or 2, characterized in that the exterior wall panel is composed of a back material and an exterior material, the back surface of the exterior material is capable of storing ends of fastening members constituting a spacing retaining member as a formwork, and has a storage space continuous in the longitudinal direction, the exterior wall panel has an upright portion of the connecting member embedded therein or attached to its back surface, and the lead-out portion is positioned so as to protrude toward the front surface side from the opposing portions of the exterior wall panels adjacent in the height direction.

4. A connection structure for exterior wall panels as described in Claim 3, characterized in that the storage space for the exterior material is arranged in a recess in the back material.

5. A connection structure for exterior wall panels as described in claim 3 or 4, characterized in that the storage space of the exterior material is formed in a protruding shape on the back side of the exterior material.

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