Heat insulating panel

Abstract

To provide a heat insulating panel capable of reliably preventing a surface plate from peeling off or falling off.SOLUTION: A heat insulating panel P includes: a pair of surface plates 1, 2 arranged to face each other with a predetermined distance therebetween; a frame 3 interposed between peripheral portions of the pair of surface plates 1, 2; and a heat insulating material 5 arranged in an internal space defined by the pair of surface plates 1, 2 and the frame 3. Folded edge portions 12, 22 that are folded toward each other are formed in peripheral edges of the pair of surface plates 1, 2. An engagement member 4 is integrally provided on the frame 3, the engagement member 4 capable of preventing a relative movement in a separating direction of the pair of surface plates 1, 2 through simultaneous engagement of the folded edge portions 12, 22 of the pair of surface plates 1, 2.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a heat insulating panel which constitutes a ceiling, wall or partition of a building, such as a prefabricated refrigerator / freezer, a clean room, a warehouse or the like. [Background technology]

[0002] Generally, the insulating panels used in the above-mentioned buildings, for example, are constructed by attaching a surface plate to the surface of an insulating material formed into a plate of a specified thickness, and the surface of this surface plate (if a surface plate is attached to both the front and back of the insulating material, either surface) is arranged facing the inside of the insulated room, thereby insulating the interior and exterior while maintaining the aesthetic appearance of the interior side (see, for example, Patent Document 1).

[0003] Another conventional insulating panel structure is known, for example as a component of the ceiling of a building, which is made up of a pair of surface panels (upper and lower panels), a frame material interposed between the edges of the upper and lower panels, and insulating material injected and filled into the space formed between the upper and lower panels and the frame material by fitting bent end pieces formed on each side of the upper and lower panels into mating grooves in the frame material, with mounting brackets attached to the inner surface of the upper panel (see, for example, Patent Document 2).

[0004] The heat-insulating panel described in Patent Document 2 is attached via a connecting metal fitting to a rail arranged as a base material at a position that constitutes the ceiling. In this case, the connecting metal fitting and the heat-insulating panel are fixed by abutting the upper plate against the lower surface of the lower flange part of the connecting metal fitting, and screwing a connecting screw into the mounting screw receiving part of the mounting metal fitting attached to the inner surface of the upper plate from above the lower flange part. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2010-095926 A [Patent Document 2] JP 2009-084782 A Summary of the Invention [Problem to be solved by the invention]

[0006] In the conventional insulating panel described in Patent Document 1, deterioration over time, load, and the like can cause the adhesive performance between the insulating material and the surface plate to decrease, which can lead to the surface plate peeling off from the insulating material. In addition, with the conventional insulation panel described in Patent Document 2, if the adhesion between the upper and lower panel panels and the insulation material decreases due to deterioration over time or load, or if the engagement between the upper and lower panel panels and the frame material becomes insufficient, there is a risk that the lower panel will fall off the insulation panel, even though the upper panel will remain fixed to the ceiling base material via the connecting fittings, because the mounting fittings and connecting fittings are screwed into place with connecting screws.

[0007] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide an insulating panel that can reliably prevent a surface panel from peeling off or falling off as an insulating panel for use in ceilings, walls or partitions of prefabricated refrigerator-freezers, clean rooms, warehouses, etc. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention comprises the following aspects.

[0009] 1) A pair of surface plates arranged to face each other at a predetermined distance; A frame interposed between the peripheral edges of the pair of surface plates; a heat insulating material disposed in an interior space defined by the pair of surface plates and the frame; The pair of surface plates have peripheral edges formed with folded edges that are folded toward each other, An insulating panel, wherein an engaging member is integrally provided on the frame, the engaging member being capable of simultaneously engaging with the folded edge portions of the pair of surface panels to prevent relative movement of the pair of surface panels in the direction away from each other.

[0010] 2) A pair of engagement holes are formed in the folded edge portions of the pair of surface plates, The insulating panel of 1) above, wherein the engaging member has a plurality of engaging claw portions that are respectively engaged with the edges of the pair of engaging holes.

[0011] 3) the engaging member further has a base portion at least a portion of which is embedded within the frame or fixed to an inner surface of the frame; The base portion has two ends on both sides in the thickness direction of the insulation panel, the two ends being faced from the inside of the folded edge portions of the pair of surface plates into the plurality of engagement holes, The heat insulating panel according to 2) above, wherein the plurality of engaging claw portions are provided at two ends of the base portion.

[0012] 4) The frame has a plurality of insertion grooves into which the folded edges of the pair of surface panels are respectively inserted, the plurality of engaging claw portions are arranged such that their tips are in contact with or in close proximity to the outer surfaces of the plurality of insertion grooves, The insulating panel of 3) above, wherein the portions of the frame forming the outer surfaces of the multiple insertion grooves are each elastically deformable so that the folded edge portions can be inserted into the insertion grooves up to a position where the engaging claw portions are inserted into the engaging holes, over the tips of the engaging claw portions. Effect of the Invention

[0013] According to the insulating panel of (1) above, the folded edges formed on a pair of surface panels are engaged with each other by an engaging member, thereby preventing the surface panels from moving relative to each other in the direction away from each other. Even if the adhesive performance of the surface panels and the insulating material deteriorates due to deterioration over time, load, etc., the surface panels can be reliably prevented from peeling off or falling off the insulating panel.

[0014] According to the insulation panel of (2) above, the engaging member has an engaging claw portion, and the engaging claw portion engages with the engaging hole formed in the folded edge portion, so that the surface panels can be more reliably prevented from peeling off or falling off from the insulation panel. In addition, both surface panels can be easily attached to the frame, and a decrease in workability can be prevented.

[0015] According to the insulating panel of (3) above, the engaging member has a base portion at least a portion of which is embedded inside the frame or fixed to the inner surface of the frame, and the base portion has two ends on both sides in the thickness direction of the insulating panel that face the inside of the folded edge portions of the pair of surface panels into the multiple engaging holes, and the multiple engaging claw portions are provided at the two ends of the base portion, so that the engaging claw portions engage with the engaging holes from the inside, thereby reliably maintaining engagement between the engaging claw portions and the engaging holes and more reliably preventing the surface panels from peeling off or falling off the insulating panel.

[0016] According to the insulation panel of (4) above, the insertion of the folded edge into the insertion groove restricts the movement of the folded edge in a direction perpendicular to the thickness direction of the insulation panel, so that the engagement of the engagement claws and the engagement holes is reliably maintained, and the surface panels can be more reliably prevented from peeling off or falling off from the insulation panel. Also, the formation of the insertion groove in the frame makes it easy to position both surface panels when attaching them to the frame, and further, the portions of the frame that form the outer surfaces of the multiple insertion grooves are elastically deformable, so that the attachment of both surface panels to the frame is also easy, and the engagement of the engagement claws and the engagement holes is more reliably maintained, improving workability and handleability. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is an overall perspective view showing an insulating panel according to a first embodiment of the present invention, illustrating the state before a pair of surface panels are attached to a frame. [Diagram 2] FIG. 2 is an overall perspective view of the same insulation panel, showing both surface panels attached to the frame. [Diagram 3] FIG. 2 is a vertical cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 2 is a vertical cross-sectional view taken along line IV-IV in FIG. [Diagram 5] FIG. 11 is an overall perspective view showing an insulating panel according to a second embodiment of the present invention, illustrating the state before a pair of surface panels are attached to a frame. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to Figures 1 to 5. In this embodiment, a case will be described in which a heat insulating panel according to the present invention is used as a ceiling panel. In the following description, "up and down" refers to the top and bottom of Figures 1 to 5. "Left and right" refers to the upper left and lower right of Figures 1, 2 and 5, the front and back of Figure 3, and the left and right of Figure 4. Additionally, "front and back" refers to the lower left and upper right of Figures 1, 2 and 5, the right and left of Figure 3, and the front and back of Figure 4. However, the designation of the directions of components, etc. according to the directions in these drawings is for convenience only and does not limit the scope of the present invention. In the following description, the term "oblique" also includes angles slightly inclined from the vertical to angles slightly inclined from the horizontal. Note that the shapes of components and their relative positions described in this embodiment are merely illustrative examples and are not intended to limit the scope of the present invention unless otherwise specified.

[0019] As shown in Fig. 1 and Fig. 2, the insulation panel (P1) of the first embodiment of the present invention includes a pair of upper and lower surface plates (1, 2) (hereinafter referred to as upper surface plate (1) and lower surface plate (2)) in a substantially rectangular shape in plan view, which are opposed to each other with a predetermined distance between them, a frame (3) that is interposed between the peripheral portions (four sides in this embodiment) of the surface plates (1, 2) and engages with the surface plates (1, 2) to prevent the surface plates (1, 2) from moving relatively in the direction away from each other, and an insulation material (5) that is disposed in an internal space defined by the surface plates (1, 2) and the frame (3). The insulation panels (P1) are adjacently disposed in a plurality of rows in the front-rear and left-right directions, and the insulation panels (P1) are joined together to form a ceiling surface. Note that a square shape refers to a quadrangle with four 90° corners, and the length of each side is not particularly limited. Also, although not shown in the figure, for example, a support beam held in a hanging state by a hanging means on the main body is attached across the upper surfaces of the side edges of adjacent insulation panels (P1), and the support beam is fixed via a bolt to a washer provided on the top plate (1) of the insulation panel (P1), so that the top plate (1) can be held in a hanging state on the main body via the support beam.

[0020] The surface plates (1, 2) are made of, for example, colored steel plate (PCM) and formed into thin plates having a predetermined standard size.

[0021] The frame (3) is formed with an engagement ridge (6) formed in a substantially trapezoidal cross section along its length, or an engagement recess (7) that can engage with the engagement ridge (6). When adjacent insulation panels (P1) are joined together, the side of one of the insulation panels (P1) to be joined that has the engagement ridge (6) faces the side of the other of the insulation panels (P1) to be joined that has the engagement recess (7), so that the insulation panels (P1) can be joined together without any gaps. In detail, the engagement ridge (6) is formed so that the center of the thickness direction of the insulation panel (P1) in the frame (3) protrudes outwardly in a substantially trapezoidal cross section along the length of the frame (3), and the engagement recess (7) is formed so that the center of the thickness direction of the insulation panel (P1) in the frame (3) is recessed inwardly in a substantially trapezoidal cross section along the length of the frame (3). There is no particular limitation on which side of the insulation panel (P1) the engagement ridge (6) or engagement recess (7) is formed on. Furthermore, the shapes and sizes of the engaging ridges (6) and engaging grooves (7) are not particularly limited, and may be changed as appropriate within the scope of their functions.

[0022] The heat insulating material (5) is made of, for example, a synthetic resin foam such as urethane foam or isocyanurate foam, or rock wool, and is injected and filled into the internal space defined by the surface plates (1, 2) and the frame (3).

[0023] Next, the engagement structure between the surface plates (1, 2) and the frame (3) will be described.

[0024] The peripheral edge of the pair of surface plates (1, 2) is formed with folded edges (12, 22) bent toward each other over the entire length. Furthermore, engagement holes (13, 23) are formed at both ends of four straight lines of the folded edges (12, 22) corresponding to each side edge of the surface plates (1, 2). That is, a total of eight engagement holes (13) are formed at both ends of the four straight lines of the folded edges (12) of the upper plate (1), and a total of eight engagement holes (23) are formed at both ends of the four straight lines of the folded edges (22) of the lower plate (2). In this embodiment, the shape of the engagement holes (13, 23) is a horizontal rectangle, but can be appropriately changed within a range in which the function can be performed.

[0025] The frame (3) has four straight frame members (31) of a substantially linear shape corresponding to the spaces between the side edges of the surface panels (1, 2), and corner frame members (32) of a substantially L-shape in plan view that are arranged corresponding to the four corners of the surface panels (1, 2) and connect adjacent straight frame members (31). The corner frame member (32) and the straight frame member (31) are, for example, such that the straight frame member (31) is made of a hollow member, or an insertion recess is formed at the end of the straight frame member (31) where the corner frame member (32) is attached, and an attachment allowance portion that is slightly smaller than the inner surface of the straight frame member (31) (or the recess) is formed at the end of the corner frame member (32), and the corner frame member (32) and the straight frame member (31) are connected by inserting the attachment allowance portion of the corner frame member (32) into the end of the straight frame member (31). The straight frame material (31) and the corner frame material (32) are appropriately formed with engaging ridges (6) and / or engaging recesses (7) according to the shape of the frame (3) that each constitutes. That is, when the adjacent side surfaces (frames (3)) of the insulation panel (P1) have both engaging ridges (6) or both engaging recesses (7), the corner frame material (32) is formed with two engaging ridges (6) or two engaging recesses (7), and when one of the adjacent side surfaces (frames (3)) of the insulation panel (P1) has an engaging ridge (6) and the other has an engaging recess (7), the corner frame material (32) is formed with one engaging ridge (6) and one engaging recess (7). In addition, at the upper and lower end faces of the frame (3) (straight frame material (31) and corner frame material (32)), at locations corresponding to the folded edge portions (12, 22) of the surface panels (1, 2), insertion grooves (34) are formed extending in the length direction, into which the folded edge portions (12, 22) are respectively inserted. The inner surface of the insertion groove (34) is made substantially flat. In addition, the shape of the outer surface of the insertion groove (34) is not particularly limited, but it is preferable that the bottom side of the insertion groove (34) in the part constituting the outer surface of the insertion groove (34) (hereinafter referred to as the outer wall (35)) is made into a thick portion (36), and the opening side of the insertion groove (34) is made into a thin portion (38) via a continuous inclined surface (37).In this case, when the folded edges (12, 22) of the surface panels (1, 2) are inserted into the insertion grooves (34), the tips of the folded edges (12, 22) are preferably positioned corresponding to the thick portions (36). The straight frame material (31) is made of a synthetic resin material such as polyvinyl chloride resin (PVC) and is formed by extrusion molding or injection molding.

[0026] The corner frame material (32) is provided with an engaging member (4) integrally therewith. More specifically, the engaging member (4) has a base portion (41) embedded inside the corner frame material (32) and extending in the thickness direction of the heat insulating panel (P1). The base portion (41) has two ends on both sides in the thickness direction of the heat insulating panel (P1) that face the engaging holes (13, 23) from the inside of the folded edge portions (12, 22), and an engaging claw portion (42) is provided on each of the two ends. The engaging claw portions (42) extend obliquely from both ends of the base portion (41) toward the center of the base portion (41), and both ends of the engaging claw portions (42) protrude outward from the corner frame material (32) and are in contact with or in close proximity to the portions of the outer surface of the insertion groove (34) that correspond to the thin portion (38) of the outer wall (35). Furthermore, when the surface plates (1, 2) are assembled to the frame (3), the engaging claws (42) are inserted into the engaging holes (13, 23) of the folded edges (12, 22) from the inside of the folded edges (12, 22) and protrude outward from the folded edges (12, 22) to engage with the edges of the engaging holes (13, 23). The center of the thickness direction of the heat insulating panel (P1) in the base portion (41) is appropriately formed into a convex and / or concave shape according to the shape of the corner frame material (32) to which the engaging member (4) is provided, but the shape can be appropriately changed as long as it does not interfere with the joining of adjacent heat insulating panels (P1). The engaging member (4) is made of a non-combustible material, for example, a SUS molded material or an aluminum molded material. In this embodiment, the engaging claw portion (42) is a thin plate formed integrally with the base portion (41) by bending the tip edges of the two ends of the base portion (41), but the shape and structure are not limited thereto, and for example, a convex member may be attached to the tip of the base portion (41) as a separate member from the base portion (41). It is preferable that the upper surface of the upper engaging claw portion (42) and the lower surface of the lower engaging claw portion (42) are inclined from a right angle to the insertion direction of the folded edges (12, 22) into the insertion groove (34) toward the insertion direction.In addition, it is preferable that the lower surface of the upper engagement claw portion (42) and the upper surface of the lower engagement claw portion (42) are perpendicular to the insertion direction of the folded edge portion (12, 22) into the insertion groove (34) or inclined from a perpendicular angle toward the insertion direction, and it is more preferable that they are inclined from a perpendicular angle toward the insertion direction.

[0027] To manufacture the insulation panel (P1) configured as above, first, the four straight frame members (31) and the four corner frame members (32) are connected to form the frame (3) that defines the entire side perimeter of the insulation panel (P1). After that, the surface panels (1, 2) are pushed into the frame (3) from above and below, and the folded edges (12, 22) are inserted into the insertion grooves (34) and assembled. At that time, when the tips of the folded edges (12, 22) are pushed between the tips of the engaging claw portions (42) and the thin portions (38) of the outer wall (35), the thin portions (38) of the outer wall (35), which are made of a synthetic resin profile, elastically deform outward and are moved away from the tips of the engaging claw portions (42), allowing the tips of the folded edges (12, 22) to pass between the tips of the engaging claw portions (42) and the thin portions (38) of the outer wall (35), and the tips of the folded edges (12, 22) overcome the tips of the engaging claw portions (42), and the folded edges (12, 22) are inserted into the insertion grooves (34). When the tips of the folded edges (12, 22) are further pushed in, the engaging claws (42) are inserted into the engaging holes (13, 23) from the inside of the folded edges (12, 22) and protrude outward from the folded edges (12, 22), and the thin-walled portions (38) of the outer wall (35) return to a position in contact with or close to the tips of the engaging claws (42). The insertion of the folded edges (12, 22) into the insertion grooves (34) stops when the inner surfaces in the vertical direction of the face plates (1, 2) abut the upper and lower surfaces of the insulation, and at that position the tips of the folded edges (12, 22) are positioned opposite the thick-walled portions (36) of the outer wall (35). The internal space defined by the surface panels (1, 2) and frame (3) thus assembled is filled with insulating material (5) through an injection port (not shown) provided in the frame (3), and the surface panels (1, 2) and the insulating material (5) are bonded together to produce the insulating panel (P1).

[0028] According to the insulating panel (P1) of the above embodiment, even if the adhesive performance of the surface panels (1, 2) and the insulating material (5) deteriorates and the surface panels (1, 2) are peeled off from the insulating material (5), the upper engaging claw portion (42) of the engaging member (4) engages with the lower edge of the engaging hole (13) of the folded edge portion (12) of the upper panel (1) to prevent the upper panel (1) from moving upward, and at the same time, the lower engaging claw portion (42) of the engaging member (4) engages with the upper edge of the engaging hole (23) of the folded edge portion (22) of the lower panel (2) to prevent the lower panel (2) from moving downward. Therefore, even if a force is applied in a direction that moves the surface panels (1, 2) away from each other, relative movement of the surface panels (1, 2) in the direction away from each other is reliably prevented. In addition, because the engaging claws (42) extend obliquely from both ends of the base portion (41) toward the center of the base portion (41), the engagement between the engaging holes (13, 23) and the engaging claws (42) is reliably maintained even if a force acts on the surface plates (1, 2) in the separating direction. In addition, because the upper surface of the upper engaging claw (42) and the lower surface of the lower engaging claw (42) are inclined from a right angle to the insertion direction of the folded edge portions (12, 22) into the insertion grooves (34) toward the insertion direction, and the lower surface of the upper engaging claw (42) and the upper surface of the lower engaging claw (42) are inclined from a right angle to the insertion direction of the folded edge portions (12, 22) into the insertion grooves (34) toward the insertion direction, the surface plates (1, 2) are easily assembled to the frame (3), and the engagement between the engaging holes (13, 23) and the engaging claws (42) is reliably maintained. Furthermore, when the surface panels (1, 2) are attached to the frame (3), the tips of the folded edges (12, 22) are positioned to face the thick portion (36) of the outer wall (35), restricting horizontal movement of the surface panels (1, 2), and even if a horizontal force acts on the surface panels (1, 2), the engagement of the engagement holes (13, 23) and the engagement claws (42) is more reliably maintained. This reliably prevents not only the upper panel (1) suspended from the structure, but also the lower panel (2) from falling off or falling off the insulation panel (P1).In addition, the engagement holes (13, 23) and the engagement members (4) are provided at the four corners of the surface plates (1, 2), improving stability. Furthermore, the provision of the reinforcing members (39) distributes the load even when a user walks on the insulation panel (P1) for work, etc., and more reliably prevents the lower panel (2) from peeling off or falling off the insulation panel (P1), allowing safe work. In addition, the thin-walled portion (38) of the outer wall (35) made of synthetic resin shaped material is elastically deformable outward, making it easy to assemble the surface plates (1, 2) to the frame (3), and preventing a decrease in workability. Furthermore, since the engagement members (4) are made of non-combustible materials such as SUS shaped material or aluminum shaped material, the engagement members (4) reliably prevent the surface plates (1, 2) from peeling off or falling off even in the unlikely event that the insulation material (5) is burned down due to a fire, etc.

[0029] Two engaging members (4) are provided on one corner frame member (32) to correspond to two adjacent outer surfaces of the corner frame member (32), i.e., two surfaces arranged to sandwich the corner of the folded edge portion (12, 22), but one corner frame member (32) may be provided with one engaging member bent so as to correspond to the corner. The engaging members (4) are provided on all four corner frame members (32), but it is sufficient that they are provided on at least two corner frame members (32) located diagonally out of the four corner frame members (32). If the engaging members (4) are provided on at least two corner frame members (32) located diagonally out, the stability of the insulation panel (P1) is improved, and even if a load is applied to the insulation panel (P1) when a user stands on the insulation panel (P1) to perform work, the surface panels (1, 2) can be reliably prevented from peeling off or falling off the insulation panel (P1).

[0030] The folded edge portions (12, 22) are formed around the entire periphery of the surface plates (1, 2), but are not limited thereto. The folded edge portions (12, 22) may be formed by folding only a portion of the front, rear, left, and right ends of each of the surface plates (1, 2), for example, portions corresponding to the corners of the surface plates (1, 2), or may be formed by folding only intermediate portions in the length direction of each of the front, rear, left, and right ends of the surface plate main body (11, 21). In these cases, a plurality of insertion grooves (34) are formed at portions corresponding to each of the folded edges (12, 22). The positions at which the folded edges (12, 22), the engagement holes (13, 23), and the engagement members (4) are arranged are not particularly limited, and may be appropriately changed depending on the configuration of the insulation panel (P1) and the like, as long as they can fulfill their functions.

[0031] The shape of the outer wall (35) is not limited to the above and can be changed as appropriate within the range where it can perform its function, but it is preferable for it to have a thick portion (36) that corresponds to the tip of the folded edge portion (12, 22) and is made difficult to elastically deform so as to restrict the horizontal movement of the surface panels (1, 2), and a thin portion (38) that corresponds to the tip of the engaging claw portion (42) and is made easy to elastically deform so that the tip of the folded edge portion (12, 22) can be inserted between the inner surface of the outer wall (35) and the engaging claw portion (42).

[0032] The arrangement of the engagement holes (13, 23) and the engagement claw portion (42) in the thickness direction of the insulation panel (P1) is not particularly limited, but it is preferable that they be arranged so that the tip of the folded edge portion (12, 22) can face the thick portion (36) of the outer wall (35) when the tip side edge of the folded edge portion (12, 22) in the engagement hole (13, 23) and the engagement claw portion (42) are engaged with each other.

[0033] The base portion (41) of the engaging member (4) is entirely embedded inside the frame (3) (the corner frame material (32) in this embodiment), but the mounting structure of the base portion (41) to the frame (3) is not limited thereto, and it is sufficient that at least a part of the base portion (41) is embedded inside the frame (3) or fixed to the inner surface of the frame (3). Preferably, at least the outer surface of the base portion (41) in the lateral direction of the insulation panel (P1) can be covered by the frame (3), and more preferably, the entire base portion (41) is embedded inside the frame (3). With such a structure, the base portion (41) made of a noncombustible material is not exposed on the outer surface of the insulation panel (P1), which does not impair the appearance of the insulation panel (P1) and improves the design.

[0034] Fig. 5 shows a heat insulating panel (P2) according to a second embodiment of the present invention. In the following description of the heat insulating panel (P2), description of the same configuration as the heat insulating panel (P1) according to the first embodiment of the present invention will be omitted.

[0035] The heat-insulating panel (P2) includes a pair of substantially hexagonal planar surface plates (101, 102) (hereinafter referred to as the upper surface plate (101) and the lower surface plate (102)) facing each other with a predetermined distance therebetween, a frame (103) interposed between the peripheral edges (six sides in this embodiment) of the surface plates (101, 102) and engaged with the surface plates (101, 102) to prevent the surface plates (101, 102) from moving relatively away from each other, and a heat-insulating material (5) disposed in an internal space defined by the surface plates (101, 102) and the frame (103). More specifically, the surface plates (101, 102) have a shape in which one corner of a square is cut out, and have five corners whose interior angles form substantially right angles and one corner whose interior angle forms substantially 270°. By combining and arranging adjacent insulation panels (P2) having surface panels (101, 102) having the above-mentioned shapes, various patterns can be formed when the lower panel (102) is arranged on the indoor side as a ceiling surface, and an aesthetically pleasing ceiling surface can be constructed.

[0036] The peripheral portions of the pair of surface plates (101, 102) are formed with folded edges (112, 122) folded toward each other over their entire length. Furthermore, engagement holes (113, 123) are formed at the ends of the straight portions of the folded edges (112, 122) that sandwich the points corresponding to the five corners of the surface plates (101, 102) where the interior angles of the surface plates (101, 102) are substantially right angles. That is, a total of ten engagement holes (13) are formed in the folded edge portion (112) of the upper plate (101), and a total of ten engagement holes (123) are formed in the folded edge portion (122) of the lower plate (102). In this embodiment, the shape of the engagement holes (113, 123) is a horizontal rectangle, but can be appropriately changed within a range where the function can be performed.

[0037] The frame (103) has six straight frame members (31) of a substantially linear shape corresponding to the spaces between the side edges of the surface panels (101, 102), and corner frame members (32) of a substantially L-shape in plan view that are arranged to correspond to the five corners of the surface panels (101, 102) whose interior angles form right angles and connect adjacent straight frame members (31). Note that the straight frame member (31) corresponding to the spaces between the side edges sandwiching one corner of the surface panels (101, 102) whose interior angle forms 270° may be replaced with an integrally formed L-shaped frame member. In addition, in this embodiment, the straight frame materials (31) corresponding to the side edges sandwiching a corner in the surface panels (101, 102) having an interior angle of 270° are connected to each other, for example, by gluing the end faces together, but the corner frame material (32) may also be connected using a corner frame material modified in configuration to accommodate a corner with an interior angle of 270°.

[0038] An engaging ridge (106) and an engaging recess (107) that can engage with the engaging ridge (106) are formed in a generally trapezoidal cross section along the length direction of the frame (103) (straight frame material (31) and corner frame material (32)), but there is no particular restriction on which side of the insulation panel (P2) the engaging ridge (106) or the engaging recess (107) is formed on, and this is set appropriately depending on the combination of the insulation panel (P2) with an adjacent insulation panel. Furthermore, there is no particular restriction on the shape and size of the engaging ridge (106) and the engaging recess (107), and they can be changed appropriately as long as they can fulfill their functions.

[0039] The engagement structure between the surface panels (101, 102) and the frame (103) of the insulation panel (P2), i.e., the engagement structure between the engagement holes in the folded edges (112, 122) of the surface panels (101, 102) and the engagement members (4) of the corner frame material (32), is similar to that of the insulation panel (P1) of the first embodiment.

[0040] In the above two embodiments, the insulating panels (P1, P2) are substantially square or substantially hexagonal in plan view, but the insulating panels according to the present invention are not limited to these shapes and can be applied to various polygonal shapes in plan view. In this case, the corner frame material (32) is appropriately changed to a corresponding shape even if the shape of the corner (angle of the interior angle) of the surface plate (1, 2, 101, 102) is an acute angle, an obtuse angle, or exceeds 180°. In addition, although the above describes the case where the insulating panels (P1, P2) according to the present invention are used for a ceiling panel, the insulating panels (P1, P2) according to the present invention can also be used for a wall panel. In this case, the upper panel (1, 101) is arranged on the side of the building frame (wall slab) and the lower panel (2, 102) is arranged on the indoor side.

[0041] In the engagement structure of the surface plate (1, 2, 101, 102) and the frame (3, 103) of the present invention, for example, an engagement recess (or engagement groove) may be formed from the portion constituting the inner surface of the insertion groove (34) of the corner frame material (32) to the engagement member (4), and an engagement claw portion may be provided protruding inward from the tip side of the folded edge portion (12, 22, 112, 122) of the surface plate (1, 2, 101, 102) so that the engagement recess and the engagement claw portion can be engaged. In this case, it is preferable that the lower surface of the upper engagement claw portion and the upper surface of the lower engagement claw portion are inclined from a right angle to the insertion direction of the folded edge portion (12, 22, 112, 122) into the insertion groove (34) in the opposite direction to the insertion direction. In addition, the upper surface of the upper engaging claw portion and the lower surface of the lower engaging claw portion are preferably inclined at a right angle or from a right angle to the insertion direction of the folded edge portion (12, 22, 112, 122) into the insertion groove (34) in a direction opposite to the insertion direction, and more preferably from a right angle to the direction opposite to the insertion direction. In order to facilitate the assembly of the face plate (1, 2, 101, 102) and the frame (3, 103) and to reliably maintain the engagement between the engaging recess and the engaging claw portion, the upper surface of the upper engaging claw portion and the lower surface of the lower engaging claw portion are preferably inclined at a right angle or from a right angle to the insertion direction of the folded edge portion (12, 22, 112, 122) into the insertion groove (34) in a direction opposite to the insertion direction, and more preferably from a right angle to the direction opposite to the insertion direction. Also, the corner frame material (32) may be provided with an engaging claw portion (42) instead of an engaging recess, so as to be engaged with an engaging claw portion provided on the folded edge portion (12, 22, 112, 122). [Industrial Applicability]

[0042] INDUSTRIAL APPLICABILITY The present invention can be suitably used as a heat insulating panel constituting the ceiling, wall or partition of a building, for example, a prefabricated refrigerator / freezer, a clean room, a warehouse or the like. [Explanation of symbols]

[0043] (1)(2)(101)(102): Surface plate (12)(22)(112)(122): Folded edge (13)(23)(113)(123): Engagement hole (3)(103):Frame (31): Straight frame material (32): Corner frame material (34): Insertion groove (35):Outside wall (36):Thick part (37): Inclined part (38): Thin section (4): Engagement member (41): Base part (42): Engagement claw part (5): Insulation material (6)(106): Engagement ridges (7)(107): Engagement groove (P1)(P2):Insulation panel

Claims

1. A pair of surface plates arranged to face each other at a predetermined distance; A frame interposed between peripheral edges of the pair of surface plates; a heat insulating material disposed in an interior space defined by the pair of surface plates and the frame; The pair of surface plates have peripheral edges formed with folded edges that are folded toward each other, An insulating panel, wherein an engaging member is integrally provided on the frame, the engaging member being capable of simultaneously engaging with the folded edge portions of the pair of surface plates to prevent relative movement of the pair of surface plates in the direction away from each other.

2. A pair of engagement holes are formed in the folded edge portions of the pair of surface plates, The insulation panel according to claim 1 , wherein the engaging member has a plurality of engaging claw portions each adapted to be engaged with an edge of the pair of engaging holes.

3. the engaging member further has a base portion at least partially embedded within the frame or fixed to an inner surface of the frame; The base portion has two ends on both sides in the thickness direction of the insulation panel, the two ends being faced from the inside of the folded edge portions of the pair of surface plates into the plurality of engagement holes, The insulation panel according to claim 2 , wherein the plurality of engaging claw portions are provided at two ends of the base portion.

4. The frame has a plurality of insertion grooves into which the folded edges of the pair of surface panels are respectively inserted, the plurality of engaging claw portions are arranged such that their tips are in contact with or in close proximity to the outer surfaces of the plurality of insertion grooves, The insulating panel described in claim 3, wherein the portions forming the outer surfaces of the multiple insertion grooves in the frame are each elastically deformable so that the folded edge portion can be inserted into the insertion groove up to a position where the engaging claw portion is inserted into the engaging hole, over the tip of the engaging claw portion.

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