Insulation 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] This invention relates to a heat-insulating panel that constitutes the ceiling, wall or partition of a building, such as a prefabricated refrigerator, clean room, warehouse, etc.

Background Art

[0002] Generally, as a heat-insulating panel used in the above-mentioned building, for example, it is configured by attaching a surface plate to the surface of a heat-insulating material formed in a plate shape with a predetermined thickness. By arranging the surface of this surface plate (in the case where surface plates are attached to both the front and back surfaces of the heat-insulating material, either surface) facing the indoor side of the heat-insulating chamber, the indoor and outdoor are heat-insulated, and the aesthetics on the indoor side are maintained (for example, see Patent Document 1).

[0003] Also, as another structure of a conventional heat-insulating panel, for example, as a component for constructing the ceiling of a building, it is composed of a pair of surface plates (upper surface plate and lower surface plate), a frame material interposed at the edge portions of the upper and lower surface plates, and a heat-insulating material injected and filled into the space formed between the upper and lower surface plates and the frame material by fitting end bent pieces formed on each side of the upper and lower surface plates into fitting grooves of the frame material. A structure in which mounting fittings are attached to the inner surface of the upper surface plate is known (for example, see Patent Document 2).

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

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

[0006] According to the conventional heat-insulating panel described in Patent Document 1, there was a risk that the surface plate would peel off from the heat-insulating material due to deterioration over time, load, etc., which would reduce the adhesive performance between the heat-insulating material and the surface plate. Furthermore, according to the conventional insulation panel described in Patent Document 2, if the adhesion between the upper and lower panels and the insulation material deteriorates due to aging or load, or if the engagement between the upper and lower panels and the frame material becomes insufficient, the upper panel remains fixed to the ceiling substrate via the connecting fittings because the mounting fittings and connecting fittings are screwed in with connecting screws, but there is a risk that the lower panel may fall off the insulation panel.

[0007] This invention has been made in view of the above-mentioned problems, and aims to provide an insulating panel that can reliably prevent the surface plate from peeling off or falling off, which can be used as an insulating panel to constitute the ceiling, wall, or partition of a prefabricated refrigerator or freezer, clean room, warehouse, etc. [Means for solving the problem]

[0008] To achieve the above objective, this invention comprises the following embodiments.

[0009] 1) A pair of surface plates arranged opposite each other at a predetermined distance, A frame interposed between the peripheral edges of the pair of surface plates, The system comprises the pair of surface plates and an insulating material placed in the internal space defined by the frame, The periphery of the pair of surface plates has bent edges formed so as to face each other. An insulating panel in which an engaging member capable of preventing relative movement of the pair of surface plates in the direction of separation is integrally provided on the frame, by simultaneously engaging with the bent edges of the pair of surface plates.

[0010] 2) A pair of engagement holes is formed in the bent edges of the pair of surface plates. The heat insulating panel according to 1), wherein the engaging member has a plurality of engaging claws that engage with the edges of the pair of engaging holes, respectively.

[0011] 3) The engaging member further has a base portion which is at least partially embedded inside the frame or fixed to the inner surface of the frame. The base portion has two ends on both sides in the thickness direction of the heat insulating panel, which face the plurality of engagement holes from the inside of the bent edges of the pair of surface plates. The thermal insulation panel of 2) above, wherein the plurality of engaging claws are provided at two ends of the base portion.

[0012] 4) The frame has a plurality of insertion grooves into which the bent edges of the pair of surface plates are each inserted, The plurality of engaging claws are arranged such that their tips abut or come into close proximity to the outer surface of each of the plurality of insertion grooves. The heat insulating panel according to 3), wherein the portions forming the outer surfaces of the plurality of insertion grooves in the frame are elastically deformable so that the bent edge portion can be inserted into the insertion groove to a position where it can pass over the tip of the engaging claw portion and into the engaging hole. [Effects of the Invention]

[0013] According to the insulation panel described in (1) above, the bent edges formed on a pair of surface plates are engaged with each other by an engaging member, so relative movement of the two surface plates in the direction of separation is prevented, and even if the adhesive performance of the two surface plates and the insulation material deteriorates due to aging or load, it is possible to reliably prevent the surface plates from peeling off or falling off the insulation panel.

[0014] According to the insulation panel described in (2) above, the engaging member has an engaging claw portion, and since the engaging claw portion engages with an engaging hole formed in the bent edge portion, it is possible to more reliably prevent the surface plate from peeling off or falling off the insulation panel. In addition, both surface plates can be attached to the frame easily, and a decrease in work efficiency can be prevented.

[0015] According to the insulation panel described in (3) above, the engaging member has a base portion which is at least partially 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 insulation panel which face out from the inside of the folded edges of the pair of surface plates into a plurality of engaging holes, and the plurality of engaging claws are provided on the two ends of the base portion, so that the engaging claws engage with the engaging holes from the inside, the engagement of the engaging claws and the engaging holes is reliably maintained, and the surface plates can be more reliably prevented from peeling off or falling off the insulation panel.

[0016] According to the insulation panel described in (4) above, the bending edge is inserted into the insertion groove, which restricts the movement of the bending edge in a direction perpendicular to the thickness direction of the insulation panel. This ensures that the engagement of the engaging claw and the engaging hole is securely maintained, and more reliably prevents the surface plate from peeling off or falling off the insulation panel. Furthermore, the presence of insertion grooves in the frame facilitates positioning when attaching both surface plates to the frame. Additionally, the elastic deformability of the parts forming the outer surfaces of the multiple insertion grooves in the frame facilitates the attachment of both surface plates to the frame, and ensures that the engagement of the engaging claw and the engaging hole is more securely maintained, improving workability and handling. [Brief explanation of the drawing]

[0017] [Figure 1] This is an overall perspective view showing a thermal insulation panel according to the first embodiment of the present invention, before a pair of surface panels are assembled to the frame. [Figure 2] This image shows the same insulation panel, and is an overall perspective view showing both surface panels assembled to the frame. [Figure 3] This is a vertical cross-sectional view along the line III-III in Figure 1. [Figure 4] It is a vertical sectional view taken along line IV-IV of FIG. 1. [Figure 5] It shows a heat insulation panel according to a second embodiment of the present invention, and is an overall perspective view showing a state before assembling a pair of surface plates to a frame.

Embodiments for Carrying Out the Invention

[0018] Embodiments of the present invention will be described below with reference to FIGS. 1 to 5. In this embodiment, a case where the heat insulation panel according to the present invention is used as a ceiling panel will be described. In the following description, "up and down" refers to the up and down in FIGS. 1 to 5. "Left and right" refers to the upper left and lower right in FIGS. 1, 2 and 5, the front side and the back side in FIG. 3, and the left and right in FIG. 4. Further, "front and back" refers to the lower left and upper right in FIGS. 1, 2 and 5, the right and left in FIG. 3, and the front side and the back side in FIG. 4. However, the reference to the direction of components and the like based on the directions on these drawings is for convenience and does not limit the scope of the present invention. Also, in the following description, the term "diagonal" includes angles slightly inclined from vertical to angles slightly inclined from horizontal. Note that the shapes of the components described in this embodiment, their relative arrangements, etc. are not intended to limit the scope of the present invention as long as there is no specific description, and are merely illustrative examples.

[0019] The first embodiment of the present invention, as shown in Figures 1 and 2, comprises a pair of upper and lower surface plates (1, 2) (hereinafter referred to as upper plate (1) and lower plate (2)) with a planar substantially rectangular shape, facing each other at a predetermined distance apart; a frame (3) interposed between the peripheral edges (four sides in this embodiment) of the surface plates (1, 2) and engaged with the surface plates (1, 2) to prevent the surface plates (1, 2) from moving relative to each other in the direction of separation; and an insulating material (5) arranged in the internal space defined by the surface plates (1, 2) and the frame (3). The insulating panels (P1) are arranged adjacently in multiple rows in the front-to-back and left-to-right directions, and a ceiling surface can be formed by joining the insulating panels (P1) together. Note that a rectangular shape refers to a quadrilateral with four 90° angles, and the length of each side is not particularly limited. Although not shown in the diagram, for example, a support beam, which is suspended from the building structure by a suspension mechanism, is attached across the upper surface of the side edge of adjacent insulation panels (P1), and the support beam is fixed to a washer provided on the top plate (1) of the insulation panel (P1) via bolts, so that the top plate (1) can be suspended from the building structure via the support beam.

[0020] The surface plates (1,2) are made of, for example, color-coated steel sheet (PCM) and are formed into thin sheets of a predetermined standard size.

[0021] The frame (3) has engaging protrusions (6) formed along its length in a substantially trapezoidal cross-section, or engaging recesses (7) that can engage with the engaging protrusions (6). When joining adjacent insulation panels (P1) together, the side of one insulation panel (P1) having the engaging protrusions (6) and the side of the other insulation panel (P1) having the engaging recesses (7) are brought into opposition, allowing the insulation panels (P1) to be joined together without gaps. Specifically, the engaging protrusions (6) are formed so that the central part of the insulation panel (P1) in the thickness direction of the frame (3) protrudes outward along the length direction of the frame (3) in a substantially trapezoidal cross-section, while the engaging recesses (7) are formed so that the central part of the insulation panel (P1) in the thickness direction of the frame (3) is recessed inward along the length direction of the frame (3) in a substantially trapezoidal cross-section. There is no particular limitation on which side of the insulation panel (P1) the engaging protrusions (6) or engaging recesses (7) are formed. Furthermore, the shape and size of the engaging protrusions (6) and engaging recesses (7) are not particularly limited and can be changed as appropriate within the range that allows them to perform their function.

[0022] The insulation material (5) consists of, for example, 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 panels (1,2) and frame (3).

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

[0024] The periphery of a pair of surface plates (1,2) has bent edges (12,22) that are folded toward each other along their entire length. Furthermore, engagement holes (13,23) are formed at both ends of each of the four straight sections in the bent edges (12,22) that correspond 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 each of the four straight sections of the bent edge (12) of the upper plate (1), and a total of eight engagement holes (23) are formed at both ends of each of the four straight sections of the bent edge (22) of the lower plate (2). In this embodiment, the shape of the engagement holes (13,23) is a horizontal rectangle, but it can be appropriately changed within a range that allows it to perform its function.

[0025] The frame (3) has four substantially straight frame members (31) corresponding to the sides of the surface panels (1,2), and a corner frame member (32) which is arranged corresponding to the four corners of the surface panels (1,2) and connects adjacent straight frame members (31). The corner frame member (32) and the straight frame member (31) are connected in such a way that, for example, 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) to which the corner frame member (32) is attached, and an attachment portion is formed at the end of the corner frame member (32) which is slightly smaller than the inner surface of the straight frame member (31) (or the recess), and the corner frame member (32) and the straight frame member (31) are connected by the attachment portion of the corner frame member (32) being inserted into the end of the straight frame member (31). The straight frame members (31) and corner frame members (32) are each appropriately formed with engaging protrusions (6) and / or engaging recesses (7) according to the shape of the frame (3) they constitute. That is, if both adjacent sides (frames (3)) of the insulation panel (P1) have engaging protrusions (6) or both have engaging recesses (7), the corner frame member (32) will have two engaging protrusions (6) or two engaging recesses (7). If one of the adjacent sides (frames (3)) of the insulation panel (P1) has an engaging protrusion (6) and the other has an engaging recess (7), the corner frame member (32) will have one engaging protrusion (6) and one engaging recess (7). Furthermore, at the upper and lower end faces of the frame (3) (straight frame material (31), corner frame material (32)), corresponding to the bent edges (12, 22) of the surface plates (1, 2), insertion grooves (34) are formed, extending in the longitudinal direction, into which the bent edges (12, 22) are inserted. The inner surface of the insertion groove (34) is substantially flat. 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 portion constituting the outer surface of the insertion groove (34) (hereinafter referred to as the outer wall (35)) is a thickened portion (36), and the opening side of the insertion groove (34) is a thinned portion (38) via a continuous inclined surface (37).In this case, when the bent edges (12, 22) of the surface plates (1, 2) are inserted into the insertion grooves (34), it is preferable that the tips of the bent edges (12, 22) are positioned to correspond to the thickened portion (36). The straight frame material (31) is made of a synthetic resin profile such as polyvinyl chloride resin (PVC), and is formed by extrusion molding or injection molding.

[0026] An engaging member (4) is integrally provided on the corner frame member (32). More specifically, the engaging member (4) is embedded inside the corner frame member (32) and has a base portion (41) that extends in the thickness direction of the insulation panel (P1). The base portion (41) has two ends on both sides in the thickness direction of the insulation panel (P1) that face the engaging holes (13, 23) from the inside of the bent edge portions (12, 22), and an engaging claw portion (42) is provided at each of these ends. The engaging claw portions (42) extend diagonally 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 member (32) and are in contact with or close to the thin portion (38) of the outer wall (35) on the outer surface of the insertion groove (34). Furthermore, when the surface plates (1,2) are assembled to the frame (3), the engaging claw portion (42) is inserted from the inside of the bent edge portion (12,22) into the engaging hole (13,23) of the bent edge portion (12,22), protruding outward from the bent edge portion (12,22), and engaging with the edge of the engaging hole (13,23). In addition, the central part in the thickness direction of the heat insulating panel (P1) in the base portion (41) is formed into a convex and / or concave shape as appropriate according to the shape of the corner frame material (32) on which the engaging member (4) is provided, but its shape can be changed as appropriate within a range that does not hinder the joining of adjacent heat insulating panels (P1). The engaging member (4) is made of a non-combustible material, such as a SUS profile or an aluminum profile. Furthermore, in this embodiment, the engaging claw portion (42) is a thin plate-like structure formed integrally with the base portion (41) by bending the tip edges of the two ends of the base portion (41). However, the shape and structure are not limited to this, 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 perpendicular to the insertion direction of the bent edge portions (12,22) into the insertion groove (34) toward the insertion direction.Furthermore, the lower surface of the upper engaging claw portion (42) and the upper surface of the lower engaging claw portion (42) are preferably inclined perpendicular to the insertion direction of the bent edge portion (12, 22) into the insertion groove (34), or from a perpendicular to the insertion direction, and more preferably from a perpendicular to the insertion direction.

[0027] To manufacture the insulation panel (P1) configured as described above, first, four straight frame members (31) and four corner frame members (32) are connected to form a frame (3) that defines the entire perimeter of the side of the insulation panel (P1). Then, the surface panels (1,2) are pushed into the frame (3) from above and below, and the bent edges (12,22) are inserted into the insertion grooves (34) to assemble them. At that time, when the tip of the bent edge portion (12,22) is pushed between the tip of the engaging claw portion (42) and the thin portion (38) of the outer wall (35), the thin portion (38) of the outer wall (35), which is made of synthetic resin profile, elastically deforms outward and is separated from the tip of the engaging claw portion (42), allowing the tip of the bent edge portion (12,22) to pass between the tip of the engaging claw portion (42) and the thin portion (38) of the outer wall (35), and the tip of the bent edge portion (12,22) passes over the tip of the engaging claw portion (42), and the bent edge portion (12,22) is inserted into the insertion groove (34). As the tips of the bent edges (12,22) are pushed in further, the engaging claws (42) are inserted into the engaging holes (13,23) from the inside of the bent edges (12,22) and protrude outward from the bent edges (12,22), and the thin portion (38) of the outer wall (35) returns to a position where it is in contact with or close to the tip of the engaging claws (42). Insertion of the bent edges (12,22) into the insertion grooves (34) stops when the vertical inner surfaces of the surface plates (1,2) come into contact with the upper and lower surfaces of the insulation material, and at that position the tips of the bent edges (12,22) are positioned opposite the thick portion (36) of the outer wall (35). In this way, the internal space defined by the assembled surface panels (1,2) and frame (3) is filled with insulation material (5) through an injection port (not shown) provided in the frame (3), and the surface panels (1,2) and insulation material (5) are bonded together to produce an insulation panel (P1).

[0028] According to the above embodiment of the heat-insulating panel (P1), even if the adhesive performance of the surface plates (1,2) and the heat-insulating material (5) deteriorates and the surface plates (1,2) peel off from the heat-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 bent edge portion (12) of the upper plate (1), preventing the upper plate (1) from moving upward. 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 bent edge portion (22) of the lower plate (2), preventing the lower plate (2) from moving downward. Therefore, even if a force acts in the direction that separates the surface plates (1,2) from each other, relative movement of the surface plates (1,2) in the direction of separation is reliably prevented. Furthermore, since the engaging claw portion (42) extends diagonally from both ends of the base portion (41) toward the center of the base portion (41), even if a force is applied to the surface plates (1,2) in the direction of separation, the engagement of the engaging holes (13,23) and the engaging claw portion (42) is reliably maintained. In addition, the upper surface of the upper engaging claw portion (42) and the lower surface of the lower engaging claw portion (42) are inclined from perpendicular to the insertion direction of the bent edge portion (12,22) into the insertion groove (34), and the lower surface of the upper engaging claw portion (42) and the upper surface of the lower engaging claw portion (42) are inclined from perpendicular to the insertion direction of the bent edge portion (12,22) into the insertion groove (34), making it easy to assemble the surface plates (1,2) to the frame (3), and ensuring that the engagement of the engaging holes (13,23) and the engaging claw portion (42) is reliably maintained. Furthermore, when the surface plates (1,2) are assembled to the frame (3), the tips of the bent edges (12,22) are positioned opposite the thickened portion (36) of the outer wall (35). This restricts the horizontal movement of the surface plates (1,2), and even if a horizontal force is applied to the surface plates (1,2), the engagement of the engagement holes (13,23) and engagement claws (42) is more reliably maintained. As a result, not only the upper plate (1), which is suspended from the structure, but also the lower plate (2) is reliably prevented from peeling off or falling off the insulation panel (P1).Furthermore, the engagement holes (13, 23) and engagement members (4) are provided at the four corners of the surface plates (1, 2), improving stability. In addition, the presence of reinforcing members (39) allows for load distribution even when a user walks on the insulation panel (P1) for work, thus more reliably preventing the bottom plate (2) from peeling off or detaching from the insulation panel (P1), and enabling safer work. Moreover, since the thin portion (38) of the outer wall (35), which is made of synthetic resin profile, is elastically deformable outward, assembly of the surface plates (1, 2) to the frame (3) is easy, and a decrease in work efficiency is prevented. Furthermore, since the engagement members (4) are made of non-combustible materials such as SUS profile or aluminum profile, even if the insulation material (5) is destroyed by fire, the engagement members (4) reliably prevent the surface plates (1, 2) from peeling off or detaching.

[0029] Two engaging members (4) are provided on one corner frame member (32), corresponding to two adjacent outer surfaces of the corner frame member (32), i.e., two surfaces positioned to sandwich the corners of the bent edges (12,22). However, one engaging member may be provided on one corner frame member (32) that is bent to correspond to the corner. Furthermore, although engaging members (4) are provided on all four corner frame members (32), it is sufficient if they are provided on at least two corner frame members (32) that are diagonally opposite each other. If engaging members (4) are provided on at least two diagonally opposite corner frame members (32), 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 it and works, it is possible to reliably prevent the surface plates (1,2) from peeling off or falling off the insulation panel (P1).

[0030] The bent edges (12, 22) are formed around the entire circumference of the periphery of the surface plates (1, 2), but are not limited to this. The bent edges (12, 22) may be formed by bending only a portion of the front, rear, left, and right ends of each surface plate (1, 2), for example, only the portions corresponding to the corners of the surface plates (1, 2), or by bending only the longitudinal middle portions of the front, rear, left, and right ends of each surface plate body (11, 21). In these cases, multiple insertion grooves (34) are formed at locations corresponding to each of the bent edges (12, 22). The positions where the bent edges (12, 22), engagement holes (13, 23), and engagement members (4) are arranged are not particularly limited and can be appropriately changed depending on the configuration of the heat insulating panel (P1), etc., as long as they can perform 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 in which it can perform its function, but it is preferable that it has a thick portion (36) that is less elastically deformable so that it can restrict the horizontal movement of the surface plates (1,2) in the direction of the bent edge portions (12,22) and a thin portion (38) that is more elastically deformable so that the tip of the bent edge portions (12,22) can pass between the inner surface of the outer wall (35) and the engaging claw portion (42) in the direction of the engaging claw portion (42).

[0032] The arrangement of the engagement holes (13, 23) and engagement claws (42) in the thickness direction of the heat insulating panel (P1) is not particularly limited, but it is preferable that they be arranged so that when the leading edge of the bent edge (12, 22) in the engagement hole (13, 23) and the engagement claw (42) are engaged, the leading edge of the bent edge (12, 22) faces the thickened portion (36) of the outer wall (35).

[0033] The base portion (41) of the engaging member (4) is entirely embedded inside the frame (3) (in this embodiment, the corner frame member (32)), but the mounting structure of the base portion (41) to the frame (3) is not limited to this, and it is sufficient if 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 heat insulating 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), which is made of non-combustible material, is not exposed on the outer surface of the heat insulating panel (P1), the appearance of the heat insulating panel (P1) is not impaired, and the design is also improved.

[0034] Figure 5 shows an insulating panel (P2) according to the second embodiment of the present invention. In the following description of the insulating panel (P2), the same configuration as that of the insulating panel (P1) according to the first embodiment of the present invention will not be described.

[0035] The thermal insulation panel (P2) comprises a pair of upper and lower surface plates (101, 102) (hereinafter referred to as the upper plate (101) and lower plate (102)) that are approximately hexagonal in plan and are positioned opposite each other at a predetermined distance apart; 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 relative to each other in the direction of separation; and thermal insulation material (5) placed in the 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 rectangle is cut out in a rectangular shape, and have five corners with interior angles that are approximately right angles, and one corner with an interior angle that is approximately 270°. By combining and arranging adjacent insulation panels (P2) equipped with surface panels (101, 102) having the shapes described above, various patterns can be formed when the bottom panel (102) is placed on the interior side as the ceiling surface, resulting in an aesthetically pleasing ceiling surface.

[0036] The periphery of the pair of surface plates (101, 102) has bent edges (112, 122) that are folded inward along their entire length. Furthermore, engagement holes (113, 123) are formed at the ends of the straight sections that straddle the five corners of the bent edges (112, 122) where the interior angles of the surface plates (101, 102) are approximately right angles. In other words, there are a total of 10 engagement holes in the bent edge (112) of the top plate (101). (113) Ten engagement holes (123) are formed in the bent edge (122) of the lower plate (102). In this embodiment, the shape of the engagement holes (113, 123) is a horizontal rectangle, but it can be changed as appropriate within the range that allows it to perform its function.

[0037] The frame (103) has six roughly straight frame members (31) corresponding to each side edge of the surface panels (101, 102), and roughly L-shaped corner frame members (32) arranged to correspond to the five corners of the surface panels (101, 102) where the interior angles are right angles, and connecting adjacent straight frame members (31). Note that the straight frame members (31) corresponding to the side edges surrounding one corner of the surface panels (101, 102) where the interior angle is 270° may be replaced with integrally formed L-shaped frame members. Furthermore, in this embodiment, the straight frame members (31) corresponding to the side edges that enclose one corner of the surface plate (101, 102) with an interior angle of 270° are connected, for example, by bonding their end faces together. However, the corner frame members (32) may also be connected using corner frame members that have been modified to correspond to the corner with an interior angle of 270°.

[0038] The frame (103) (straight frame material (31) and corner frame material (32)) has a substantially trapezoidal cross-section with engaging protrusions (106) and engaging recesses (107) that can engage with the engaging protrusions (106) formed along its length. However, the side of the insulation panel (P2) on which the engaging protrusions (106) or engaging recesses (107) are formed is not particularly limited and is appropriately determined by the combination of the insulation panel (P2) with adjacent insulation panels. Furthermore, the shape and size of the engaging protrusions (106) and engaging recesses (107) are not particularly limited and can be appropriately changed within the range in which they can perform their function.

[0039] The engagement structure of the surface plates (101, 102) and frame (103) of the heat-insulating panel (P2), that is, the engagement structure between the engagement holes in the bent edges (112, 122) of the surface plates (101, 102) and the engagement members (4) of the corner frame material (32), is the same as that of the heat-insulating panel (P1) of the first embodiment.

[0040] In the two embodiments described above, the insulation panels (P1, P2) are approximately rectangular or hexagonal when viewed from above. However, the insulation panels according to the present invention are not limited to these and can be applied to various polygonal shapes in plan view. In that case, the corner frame material (32) is changed to a shape that appropriately corresponds to the shape of the corners (internal angle) of the surface panels (1, 2, 101, 102), for example, acute, obtuse, or even if it exceeds 180°. Furthermore, although the above description focused on the use of the insulation panels (P1, P2) according to this invention as ceiling panels, the insulation panels (P1, P2) according to this invention can also be used as wall panels. In this case, the upper panel (1, 101) is placed on the structural frame (wall slab) side, and the lower panel (2, 102) is placed on the interior side.

[0041] Furthermore, in the engagement structure of the surface plates (1,2,101,102) and frames (3,103) in the present invention, for example, an engagement recess (or engagement groove) may be formed extending 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 that protrudes inward from the tip side of the bent edge portion (12,22,112,122) of the surface plates (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 direction perpendicular to the insertion direction of the bent edge portion (12,22,112,122) into the insertion groove (34) to a direction opposite to the insertion direction. Furthermore, the upper surface of the upper engaging claw portion and the lower surface of the lower engaging claw portion are preferably inclined perpendicular to the insertion direction of the bent edge portion (12, 22, 112, 122) into the insertion groove (34), or perpendicular to the direction opposite to the insertion direction, and more preferably perpendicular to the direction opposite to the insertion direction. The portion of the engaging recess that engages with the engaging claw portion is preferably a surface that engages with the upper surface of the upper engaging claw portion and the lower surface of the lower engaging claw portion, in order to facilitate assembly of the surface plate (1, 2, 101, 102) and the frame (3, 103) and to ensure that the engagement between the engaging recess and the engaging claw portion is reliably maintained. Alternatively, the corner frame material (32) may be provided with an engaging claw portion (42) instead of an engaging recess, so that it can engage with the engaging claw portion provided on the bent edge portion (12, 22, 112, 122). [Industrial applicability]

[0042] This invention can be suitably used as an insulating panel for the ceiling, walls, or partitions of buildings, such as prefabricated refrigerators and freezers, clean rooms, warehouses, etc. [Explanation of symbols]

[0043] (1)(2)(101)(102): Surface plate (12)(22)(112)(122): Folded edge (13)(23)(113)(123): Engagement holes (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-walled section (4): Engaging member (41): Base section (42): Engaging claw portion (5): Insulation (6)(106): Engaging protrusions (7)(107): Engagement groove (P1)(P2): Insulation panel

Claims

1. A pair of surface plates arranged facing each other at a predetermined distance, A frame interposed between the peripheral edges of the pair of surface plates, The system comprises the pair of surface plates and an insulating material placed in the internal space defined by the frame, The periphery of the pair of surface plates has bent edges formed so as to face each other. An engaging member is integrally provided on the frame, which can prevent the relative movement of the pair of surface plates in the direction of separation by simultaneously engaging with the bent edges of the pair of surface plates. A pair of engagement holes is formed in the bent edges of the pair of surface plates. An insulating panel in which the engaging member has a plurality of engaging claws that engage with the edges of the pair of engaging holes, respectively.

2. The engaging member further has a base portion which is at least partially embedded inside the frame or fixed to the inner surface of the frame. The base portion has two ends on both sides in the thickness direction of the heat insulating panel that face the plurality of engagement holes from the inside of the bent edges of the pair of surface plates, The thermal insulation panel according to claim 1, wherein the plurality of engaging claws are provided at two ends of the base portion.

3. The frame has a plurality of insertion grooves into which the bent edges of the pair of surface plates are each inserted. The plurality of engaging claws are arranged such that their tips abut or come into close proximity to the outer surface of each of the plurality of insertion grooves. The heat insulating panel according to claim 2, wherein each portion forming the outer surface of the plurality of insertion grooves in the frame is elastically deformable so that the bent edge portion can be inserted into the insertion groove to a position where the engaging claw portion is inserted into the engaging hole, overcoming the tip of the engaging claw portion.

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