JP2015031447A - Insulating panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulating panel capable of preventing leaking of a heat insulator from a venting hole.SOLUTION: An insulating panel 20 includes: a pair of face sheets 23 which are arranged spaced a predetermined distance away from each other; frame materials 30, each of which is disposed at a peripheral edge part of each face sheet 23 and is provided between the face sheets 23; and a heat insulator 25 which is foamed to fill a hollow part 27 formed by the face sheet 23 and the frame material 30. A venting hole 60 for discharging a gas, which is generated as the heat insulator 25 is foamed and fills the hollow part 27, to the exterior is formed in the frame material 30. A protrusion 69, which inhibits the heat insulator 25 from entering into the venting hole 60, is provided around the venting hole 60.

Description

  The present invention relates to a heat insulation panel.

There is known a prefabricated storage that forms a box shape by assembling a plurality of heat insulating panels. The heat insulation panels used in these storages are formed by an outer shell made up of a pair of metal plate face plates arranged opposite to each other at intervals and a synthetic resin frame material arranged at the periphery. The formed hollow portion is formed by foam filling with a heat insulating material. And when assembling a prefabricated storehouse, it is formed in the box shape by being connected with another heat insulation panel via these frame members.
Here, in the work of injecting and filling the foamable heat insulating material into the hollow portion formed by the surface plate and the frame material, gas is generated due to foaming of the heat insulating material, and the gas causes corners of the frame material In some cases, the heat insulating material may not be filled. Therefore, in order to prevent the occurrence of such unfilled portions of the heat insulating material, a configuration in which a hole for degassing is provided is known (see Patent Document 1). In the heat insulating panel of Patent Document 1, a cylindrical opening is provided at the corner of the frame material, and the length of the cylindrical portion prevents the heat insulating material from leaking. On the other hand, since the air can be retained by elongating the cylindrical portion, a small-diameter hole for removing the air is formed around the cylindrical portion.

Japanese Utility Model Publication No. 3-36826

However, in the invention as described above, since the heat insulating material leaks from the small-diameter hole, an operation of removing the leaked and hardened heat insulating material occurs, which takes time. Further, since the cylindrical portion and the small-diameter hole are provided, there is a problem that the arrangement of the holes is complicated.
This invention is completed based on the above situations, Comprising: It aims at providing the heat insulation panel which can prevent the heat insulating material leak from a vent hole by simple structure.

  The heat insulating panel of the present invention includes a pair of surface plates arranged at a predetermined interval from each other, a frame member disposed on a peripheral portion of the surface plate and provided between the surface plates, the surface plate, and the frame In the heat insulating panel comprising a heat insulating material foamed and filled in a hollow portion formed of a material, the frame material is formed with a gas vent hole for discharging the gas generated along with the foam filling of the heat insulating material to the outside. In addition, a projection is provided around the gas vent hole to prevent the heat insulating material from entering the gas vent hole.

  In the above configuration, when the heat insulating material filled in the hollow portion has foamed in the direction of the gas vent hole, the heat insulating material once contacts the protrusions around the gas vent hole, so that the heat insulating material in the direction of the gas vent hole is The speed of progress can be delayed. And since foaming of a heat insulating material advances also in the meantime, the foaming filling of the heat insulating material to the required location in a hollow part will be performed. As described above, the simple configuration of forming the protrusion around the gas vent hole enables the heat insulator to be reliably filled in the hollow portion while suppressing the intrusion of the heat insulator into the gas vent hole. . Even if such protrusions are formed, the gas, which is a gas, can flow out of the gas vent hole without any delay, so that the necessary gas venting is performed. Further, since the protrusions prevent the heat insulating material from entering the gas vent holes, it is possible to prevent the gas vent holes from being blocked during the foaming to form air pockets.

Further, as means for solving the above-mentioned problems, the following configuration may be adopted.
(1) The gas vent has a configuration in which an inner opening that opens in the hollow portion has a larger opening area than an outer opening that opens outward.
In such a configuration, the inner opening is not easily blocked, so that the gas venting effect can be maintained. Furthermore, since the area of the outer opening is smaller than the opening area on the hollow side, the opening resistance of the outlet (outer opening) is narrower than that of the inlet (inner opening) even if heat insulating material tries to enter. In addition, foaming tends to end before the heat insulating material reaches the outside. Therefore, it can prevent more reliably that a heat insulating material leaks outside.

(2) The gas vent has a communication portion for communicating the inner opening and the outer opening, and the communication portion is a top plate formed with a space between the frame member and the frame member. The gas flows through the space, and when the top plate is viewed from the plate surface, the shape of the outer opening side is linear while the shape of the inner opening side is circular. An arcuate configuration.
By providing the communication part, even when the heat insulating material enters the inner opening of the gas vent hole, the heat insulating material does not easily reach the outer opening. Therefore, it can further prevent that a heat insulating material leaks outside. In addition, while the shape of the outer opening side is a straight line, while the shape of the inner opening side is an arc shape, the opening area of the inner opening is larger than the outer opening, and as described above, the flow resistance increases, It becomes possible to more reliably prevent the heat insulating material from leaking to the outside.

(3) A configuration in which the protrusion has an arc shape along a shape of the communication portion on the inner opening side.
If comprised in this way, the clearance gap into which a heat insulating material enters between a processus | protrusion and a vent hole can be reduced. Therefore, it can further prevent that a heat insulating material leaks outside.

(4) The surface plate is formed in a rectangular shape, and the frame member includes a linear outer frame member that is substantially the same as the length of each side of the surface plate, and ends of the outer frame member. It comprises a corner frame member having a substantially L-shape in plan view, and the gas vent hole is provided at a corner of the corner frame member.
If comprised in this way, it will become easy to fill with a heat insulating material to the corner | angular part of a corner frame material by providing a vent hole in the corner | angular part of a corner frame material which is hard to be filled with a heat insulating material.

  ADVANTAGE OF THE INVENTION According to this invention, the heat insulation panel which can prevent the heat insulating material leak from a gas vent hole with a simple structure can be provided.

1 is an external perspective view of a prefabricated refrigerator according to an embodiment of the present invention. Front view of insulation panel The longitudinal section Enlarged front view of the corner of the insulation panel Front view of assembled heat insulation panel frame Perspective view of surface plate of heat insulation panel Front view of corner frame material Plan view Bottom view Same side view Sectional drawing in the XI-XI position of FIG. Enlarged perspective view with frame material of heat insulation panel assembled Enlarged perspective view of the corner of the insulation panel Perspective view of the frame material at the top of the corner panel Perspective view of corner frame material Perspective view of assembled corner frame material Longitudinal cross section with corner frame assembled

<Embodiment>
An embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the refrigerator main body 10 of the prefabricated refrigerator according to the present embodiment is formed into a rectangular box shape by assembling a plurality of heat insulation panels 20, and an opening serving as an entrance is formed on the front wall. A slide door 12 that opens and closes the opening is provided. As the heat insulating panel 20, for example, two roof panels 15 and a base panel (forming a bottom surface), a side panel 17 disposed on the side surface and the front and back surfaces, and four corner panels 19 disposed on four corners of the peripheral wall are provided. ing.

  The basic structure of the heat insulation panel 20 will be described by taking the side panel 17 as an example. As shown in FIG. 2 and FIG. 3, a pair of surface plates 23 made of metal plates are opposed to each other at a predetermined interval, and a frame member 30 made of a synthetic resin molded product such as hard vinyl chloride is attached to the peripheral portion. As a result, the outer shell 21 is formed, and the hollow portion 27 formed in the outer shell 21 is filled with the heat insulating material 25 made of foamed resin.

Hereinafter, the heat insulation panel 20 will be described more specifically.
As shown in FIG. 5, the frame member 30 includes a linear outer peripheral frame member 31 and a corner frame member 40 that connects ends of the outer peripheral frame member 31. In the outer peripheral frame member 31 and the corner frame member 40, insertion grooves 33 and 41 (see FIG. 4) are formed on the entire surface of the frame member 30 on the surface in contact with the surface plate 23. As shown in FIG. 6, insertion plates 23 </ b> A are formed by bending at right angles on the four sides of the surface plate 23. Then, as shown in FIG. 13, by inserting the insertion plate 23 </ b> A into the corresponding insertion grooves 33 and 41, the surface plate 23 and the frame member 30 are fixed, and the outer shell body 21 (see FIG. 2) is It is formed. As shown in FIG. 6, a C-cut 23B for bending the insertion plate 23A at a right angle is applied to the corner portion of the surface plate 23.

Moreover, as shown in FIG. 13, the 1st groove part provided in order to assemble | attach heat insulation panels 20 to the side surface of the outer periphery frame material 31 or a 1st protrusion (it shows the 1st groove part 35 in drawing). ) Are provided, and the heat insulating panels 20 are connected to each other by combining the first concave stripe portions 35 and the first convex stripe portions. Further, a similar second ridge portion 37 is provided at a connecting portion between the roof panel 15 (see FIG. 1) and the base panel, and the roof panel 15 and the base panel and the heat insulating panel 20 are connected.
And the outer periphery frame material 31 of the heat insulation panel 20 comprised in this way is provided with the injection hole (not shown) of the heat insulating material 25 (refer FIG. 2).

Next, the corner frame member 40 will be described taking the corner frame member 40 at the upper right of the heat insulation panel 20 as an example.
As shown in FIG. 7, the corner frame member 40 includes a lateral side surface 43 and an upper side surface 45 that are connected in a substantially L shape in plan view. Then, on the lateral side surface 43 of the corner frame member 40, as shown in FIG. 13, the first groove portion or the first groove portion connected to the first groove portion 35 or the first protrusion portion provided in the outer peripheral frame member 31. A protruding portion (the first concave portion 51 is shown in the drawing) is provided. The upper side surface 45 is provided with a second ridge 55 that is continuous with the second ridge provided on the outer peripheral frame member 31. The lateral side surface 43 and the upper side surface 45 are formed with extending portions 43A and 45A that fit inside the outer peripheral frame member 31. The extending portions 43A and 45A are formed thinner than the thickness of the lateral side surface 43 and the upper side surface 45 by the thickness of the outer peripheral frame member 31, and when the corner frame member 40 and the outer peripheral frame member 31 are fitted to each other, The corner frame member 40 and the outer peripheral frame member 31 are substantially flush with each other. Since the extension portions 43A and 45A and the outer peripheral frame member 31 are connected in an overlapping manner, the corner frame member 40 and the outer peripheral frame member 31 are unlikely to be separated from each other even if they are connected by fitting. The material 25 can be prevented from leaking from the joint.

As shown in FIG. 7, a substantially triangular contact surface 47 is formed so as to connect the L-shaped side surface 43 and the upper side surface 45 of the corner frame member 40 on the surface plate 23 side. ing. The contact surface 47 is provided up to a position where the end portions of the extending portions 43A and 45A of the lateral side surface 43 and the upper side surface 45 are connected to each other, and the outer frame material 31 of the extending portions 43A and 45A is fitted therein. The thickness of the outer peripheral frame member 31 is reduced by the outer peripheral frame member 31 so that the surface of the outer peripheral frame member 31 on the surface plate 23 side and the contact surface 47 are flush with each other.
Conventionally, there has been a problem that the heat insulating material 25 is likely to leak due to the C-cut 23B (see FIG. 6) applied to the corners of the surface plate 23. However, in the present embodiment, by forming the contact surface 47 on the corner frame member 40, the contact distance between the surface plate 23 and the corner frame member 40 can be approximately double that when the contact surface 47 is not formed. It is possible to suppress foam leakage from the corners of the heat insulation panel 20.

As shown in FIG. 13, the first groove portion 35 of the outer peripheral frame member 31 is formed from two groove portions, and the first groove portion 35 is provided between the two first groove portions 35. Ridges 39 having a height of about half of the height are provided. A protrusion 39 </ b> A is formed over the entire length of the convex portion 39 at the center in the width direction. The protrusion 39 </ b> A has a height that does not protrude from the outer peripheral frame member 31, and is provided for the purpose of preventing the outer peripheral frame member 31 from bulging due to the foaming pressure of the heat insulating material 25.
On the other hand, the first recess 51 of the corner frame member 40 is formed of two recesses so as to be continuous with the shape of the first recess 35 of the outer peripheral frame member 31, and the two first recesses are formed. Between the parts 51, a protruding line part 53 is formed so as to continue to the protruding line part 39. The protrusion 53A is also formed with a protrusion 53A in a shape that is continuous with the protrusion 39A. The protrusion 53A is formed so that its height gradually decreases, and the end of the protrusion 53A is the protrusion 53A. The position is about half of the length. The protrusion 53A is also formed so as to prevent the corner frame member 40 from bulging and to be continuous with the protrusion 39A, so that the corner of the protrusion 39A abuts on another heat insulating panel to form a scratch, This prevents the corners of the protrusions 39A from hitting and injuring them.

As shown in FIG. 13, the second ridge portion 37 of the outer peripheral frame member 31 is formed of two ridge portions, and a concave ridge portion 38 is provided between the two second ridge portions 37. It has been. A groove portion 38 </ b> A is formed at the center of the concave portion 38 in the width direction so as to be one step lower than the concave portion 38 over the entire length thereof.
As shown in FIG. 13, the second ridge 55 of the corner frame member 40 is formed of two ridges so as to be continuous with the shape of the second ridge 37 of the outer frame 31. Between the 2nd protruding item | line parts 55, the recessed item part 57 is formed so that it may continue with the recessed item part 38 of the outer periphery frame material 31. FIG. However, the groove 57 is not formed with a groove, but has the same depth as the groove 38 </ b> A of the outer peripheral frame member 31. In addition, as for the extending part 43A, a groove part is formed shallowly so that the shape of the outer periphery frame material 31 may be followed, and the groove part is also formed in the center part.

Further, as shown in FIG. 10, an outer opening 61 of the gas vent hole 60 is formed at the upper end portion (the portion where the protrusion 53 </ b> A is not formed) of the ridge portion 53. The outer opening 61 is formed in a long hole shape that is elongated in the width direction of the ridge 53, and the size thereof is about 1 mm × 15 mm. Further, it is formed on the lateral side surface 43 of the corner frame member 40 so as to be positioned substantially at the center in the width direction.
And as shown in FIG. 11, the gas vent hole 60 is extended toward the hollow part 27 side so that it may continue from the outer side opening 61, and the inner side opening 63 is opening in the hollow part 27 side. A communication plate 65 is formed between the outer opening 61 and the inner opening 63. The communication plate 65 has a top plate portion 65A that is parallel to the inner surface 57A of the corner frame member 40 and both side surface portions 65B that are formed between the inner surface of the concave strip 57 of the corner frame member 40. It has a channel shape. A space between the communication plate 65 and the inner surface 57 </ b> A of the recess 57 of the corner frame member 40 is a communication hole 67 that communicates the outer opening 61 and the inner opening 63. That is, the gas vent hole 60 is formed by the outer opening 61, the inner opening 63, and the communication hole 67 formed by the communication plate 65.
As shown in FIG. 9, in the top plate portion 65A of the communication plate 65, the shape on the outer opening 61 side is linear, while the end face 65C on the inner opening 63 side is arcuate, A side surface portion 65B is formed from the end portion of the shape. For this reason, the opening area of the inner opening 63 is about 15% larger than that of the outer opening 61.
In addition, since the heat insulating material 25 foams from below when the heat insulating material 25 is foam-filled, it is preferable that the gas vent hole 60 be as close to the upper as possible. The gas vent hole 60 is arranged at the center in the width direction of the corner frame member 40 so that there is no assembling direction from the work efficiency.

On the left side of the inner surface 57A of the concave strip portion 57 of the corner frame member 40 in FIG. 9 (the side far from the lateral side surface 43 provided with the outer opening 61 with respect to the inner opening 63), a protrusion 69 is formed. Yes. The protrusion 69 has an arc shape that follows the shape of the end face 65 </ b> C of the communication plate 65. Thus, by making the shape of the inner opening 63 formed by the communication plate 65 the same as the shape of the protrusion 69, it becomes difficult for the heat insulating material to enter between the inner opening 63 and the protrusion 69 when the heat insulating material 25 is foamed. .
The protrusion 69 is formed to have a height that is approximately the same as the height at which the communication plate 65 is disposed. When the heat insulating material 25 is filled, since the heat insulating material 25 is filled from the protrusion 69 side, the heat insulating material 25 is difficult to leak from the gas vent hole 60.

  Further, in the case of a corner panel frame member 70 for the corner panel 19 as shown in FIG. 14, two outer peripheral frame members 31, two corner frame members 40, 1 Two connecting frame members 71 are used. If such a corner panel frame member 70 is connected by fitting and stored in the state of the corner panel frame member 70, the weight may be greater than the frictional resistance of the fitting portion, and the corner panel frame member 70 may be easily detached. . Therefore, as shown in FIGS. 15 and 16, in the present embodiment, a fitting protrusion 59 is provided on the upper side surface 45 of the corner frame member 40. Specifically, a fitting protrusion 59 is provided on the upper portion of the groove portion of the extending portion 45 </ b> A of the upper side surface 45 with the thickness of the outer peripheral frame member 31 being separated. The width of the fitting projection 59 is substantially the same as the width of the groove portion 38 </ b> A of the concave strip portion 38 of the outer peripheral frame member 31. Therefore, as shown in FIG. 17, since the fitting protrusion 59 and the extending portion 45A sandwich the bottom surface of the groove portion 38A of the concave strip portion 38, the outer peripheral frame member starts from the end surface of the corner frame member 40. 31 can be prevented from coming off upward and can be held in a fitted state. In addition, since the groove portion 38A of the concave strip portion 38 is sandwiched and fixed by the extending portion 45A and the fitting protrusion 59, the shift between components due to the foaming pressure is suppressed, and leakage can be prevented.

Then, an example of the assembly procedure of the heat insulation panel 20 of this embodiment is demonstrated.
It connects so that the 1st concave strip part 35 provided in the outer periphery frame material 31 or the 1st convex strip part, and the 1st concave strip part 51 provided in the corner frame material 40 or the 1st convex strip part may fit. And it connects so that the 2nd protruding item | line part 37 provided in the outer periphery frame material 31 and the 2nd protruding item | line part 55 provided in the corner frame material 40 may fit. At this time, the fitting projection 59 enters the groove portion 38A of the concave strip portion 38 of the outer peripheral frame member 31, and the outer peripheral frame member 31 is sandwiched and fixed by the extending portion 45A and the fitting protrusion 59 from the vertical direction. Thus, the corner frame member 40 and the outer peripheral frame member 31 are fitted together to form the frame member 30. Then, the insertion plates 23A of the surface plate 23 are inserted into the insertion grooves 33 and 41 of the frame member 30 on both the front side and the back side, and the outer shell body 21 is formed.

The outer shell body 21 formed as described above is set and fixed on a foaming jig (not shown) so that one of the surface plates 23 is on the upper side. A raw material liquid for the heat insulating material 25 is injected into the hollow portion 27 from an injection hole (not shown) of the outer peripheral frame member 31. The raw material liquid is foam-filled while flowing and diffusing inside the lower surface plate 23. At this time, the air in the hollow portion 27 (or the gas when the gas is filled before foaming) and the gas generated along with the foaming are discharged from the gas vent hole 60 to the outside.
When the foam filling of the heat insulating material 25 proceeds, the heat insulating material 25 is also foamed in the vicinity of the corner frame material 40. Under the present circumstances, foaming progresses from the lower part front (from the center of the heat insulation panel 20) in FIG. Then, when foaming is performed in the vicinity of the gas vent hole 60, the heat insulating material 25 to be foamed in the direction of the inner opening 63 of the gas vent hole 60 is brought into contact with the protruding portion 69, so that the foaming speed is increased. Become slow. On the other hand, foaming of the heat insulating material 25 proceeds at a place other than the gas vent hole 60, and the hollow portion 27 is filled with the heat insulating material 25. At this time, the inner opening 63 of the gas vent hole 60 is opened in a vertically long arc shape, and the opening area is widened, so that the gas vent hole 60 is slowly blocked by the heat insulating material 25. Therefore, the degassing effect can be maintained for a long time. That is, since the gas vent hole 60 is hardly completely blocked during the foaming of the heat insulating material 25, an air pocket is hardly formed, and the heat insulating material 25 is easily filled to every corner. In addition, since the cross-sectional area of the communication hole 67 and the opening area of the outer opening 61 are narrower than the opening area of the inner opening 63, the heat insulating material 25 that has entered from the inner opening 63 increases the flow resistance. It cannot reach and the leakage of the heat insulating material from the outer side opening 61 can be suppressed.
In this way, the heat insulating material 25 is foam-filled to every corner without leaking from the outer opening 61 of the gas vent hole 60.

  As described above, according to the present embodiment, when the heat insulating material 25 filled in the hollow portion 27 is foamed in the direction of the gas vent hole 60, the heat insulating material 25 is applied to the protrusion 69 around the gas vent hole 60. By making contact once, the advancing speed to the gas vent hole 60 direction of the heat insulating material 25 can be delayed. In addition, since the foaming of the heat insulating material 25 proceeds in the meantime, the foaming filling of the heat insulating material 25 to the necessary portions in the hollow portion 27 is performed. Thus, by forming the protrusion 69 around the gas vent hole 60, the heat insulator 25 is reliably filled in the hollow portion 27 while suppressing the intrusion of the heat insulator 25 into the gas vent hole 60. Will be able to. Even if such a protrusion 69 is formed, the gas that is a gas can flow out from the gas vent hole 60 without any delay, so that necessary gas venting is performed. Moreover, since the protrusion part 69 suppresses that the heat insulating material 25 permeates into the gas vent hole 60, it is possible to prevent the gas vent hole 60 from being blocked in the middle of foaming to form an air pocket.

  Further, in the gas vent hole, the inner opening 63 that opens to the hollow portion 27 has a larger opening area than the outer opening 61 that opens to the outside. For this reason, the inner opening 61 is not easily blocked, and the degassing effect can be maintained. Furthermore, since the opening area of the outer opening 61 is smaller than the opening area on the hollow portion 27 side, the opening area of the outlet (outer opening 61) is narrower than the inlet (inner opening 63) even if the heat insulating material 25 tries to enter. For this reason, the flow resistance increases, and foaming is likely to end before the heat insulating material 25 reaches the outside. Therefore, it can prevent more reliably that the heat insulating material 25 leaks outside.

  In addition, the gas vent hole 60 has a communication portion (a communication plate 65 and a communication hole 67) for communicating the inner opening 63 and the outer opening 61, and the communication portion is a space ( The top plate portion 65A of the communication plate 65 formed across the communication hole 67) is provided, and the gas flows through the space (the communication hole 67). The top plate portion 65A of the communication plate 65 When the surface is viewed, the shape on the outer opening 61 side is a straight line, while the shape on the inner opening 63 side is an arc. By providing the communication portion, the heat insulating material 25 is difficult to reach the outer opening 61 even when the heat insulating material 25 enters the inner opening 63 of the gas vent hole 60. Therefore, it can further prevent that the heat insulating material 25 leaks outside. Further, by making the shape of the outer opening 61 linear, while making the shape on the inner opening 63 side an arc, the opening area of the inner opening 63 is larger than that of the outer opening 61, as described above. The flow resistance is increased, and the heat insulating material can be more reliably prevented from leaking to the outside.

  Further, the protrusion 69 has an arc shape along the shape of the communication plate 65 (communication portion) on the inner opening 63 side. A gap into which the heat insulating material 25 enters between the protrusion 69 and the gas vent hole 60 can be reduced. Therefore, it can further prevent that the heat insulating material 25 leaks outside.

  Further, the surface plate 23 is formed in a rectangular shape, and the frame member 30 has a linear outer frame member 31 that is substantially the same as the length of each side of the surface plate 23 and ends of the outer frame member 31. The corner frame member 40 is connected to the corner frame member 40 having a substantially L-shape in plan view. The gas vent holes 60 are provided at the corners of the corner frame member 40. By providing the gas vent holes 60 at the corners of the corner frame member 40 that is difficult to be filled with the heat insulating material 25, the corners of the corner frame member 40 are easily filled with the heat insulating material 25.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) The present invention is not limited to the prefabricated refrigerator illustrated in the above embodiment, but includes a general prefabricated storage and a thermal insulation panel in which a storage body is constructed by assembling a plurality of thermal insulation panels, such as a freezer and a constant temperature and high humidity storage. The present invention can be widely applied to a clean room or the like that is constructed by using.
(2) The dimensions illustrated in the above embodiment are merely examples, and can be arbitrarily selected.

(3) In the above embodiment, the shape of the outer opening 61 is a long hole shape. However, the shape is not limited to the long hole shape, and may be other shapes.
(4) In the above embodiment, the shape of the communication plate 65 on the inner opening 63 side is an arc shape. However, the shape is not limited to the arc shape and is not a design surface, so the inner opening 63 is more open than the opening area of the outer opening 61. If it becomes wider, other shapes may be used. Further, in order to facilitate molding, the opening areas of the inner opening 63 and the outer opening 61 may be equal.

(5) In the above embodiment, the communication part (communication plate 65 and communication hole 67) is provided, but the communication part may not be provided, and the inner opening and the outer opening of the gas vent hole may be formed only by the thickness of the frame member. At this time, the opening area of the inner opening may be wider than the outer opening by forming a tapered shape spreading in the inner direction.
(6) In the above-described embodiment, both side surface portions 65B are provided on the communication plate 65. However, as for the side surface portions, the unevenness of the frame material may be used.

(7) In the above embodiment, the vent hole 60 is provided in the corner frame member 40, but it may be provided in the outer peripheral frame member 31. In that case, what is necessary is just to form the shape of a protrusion (protrusion part 69) so that it may become a barrier with respect to the direction in which the heat insulating material 25 foams.
(8) In the above embodiment, the protrusion 69 is provided at a position away from the gas vent hole 60 by a predetermined distance. However, the end of the protrusion is connected to both side portions (or one side portion) of the communication plate. May be. In this way, it becomes more difficult for the heat insulating material to enter between them.
(9) In the above embodiment, the vent hole 60 is provided in the vicinity of the approximate center in the vertical direction when filling the heat insulating material 25 of the corner frame member 40. However, the vent hole is formed close to the upper side. May be. In that case, it is good also as a horizontally long shape in the left-right direction instead of a vertically long shape at the time of fixing to a jig | tool.

DESCRIPTION OF SYMBOLS 10 ... Refrigerator main body 20 ... Heat insulation panel 23 ... Surface board 23A ... Insertion board 25 ... Heat insulation material 25 ... Surface board 27 ... Hollow part 30 ... Frame material 31 ... Outer frame material 40 ... Corner frame material 43 ... Side surface 45 ... Top Side surface 47 ... Contact surface 57A ... Inner surface of concave strip 60 ... Gas vent hole 61 ... Outside opening 63 ... Inside opening 65 ... Communication plate (communication portion) 65A ... Top plate portion (top plate) 65B ... Side portion 65C ... Plate shape End face on the inner opening side of the part 67 ... Communication hole (communication part) 69 ... Projection part (projection)

Claims (5)

A pair of surface plates arranged at a predetermined interval from each other;
A frame member disposed on the peripheral portion of the surface plate and provided between the surface plates;
In a heat insulating panel comprising a heat insulating material foam-filled in a hollow portion formed by the surface plate and the frame member,
The frame member is formed with a gas vent hole for discharging the gas generated along with the foam filling of the heat insulating material to the outside, and around the gas vent hole, the gas vent hole of the heat insulating material is connected to the gas vent hole. A heat insulating panel characterized in that a protrusion for preventing intrusion is provided.   2. The heat insulating panel according to claim 1, wherein an inner area of the gas vent hole that opens to the hollow portion has a larger opening area than an outer opening that opens outward. The vent hole has a communication portion for communicating the inner opening and the outer opening,
The communication portion includes a top plate formed with a space between the frame member, and the gas flows through the space.
The shape of the said inner side opening side is made into circular arc shape, while the shape of the said outer side opening side is linear when the plate | board surface is seen. Thermal insulation panel.   The heat insulating panel according to claim 3, wherein the protrusion has an arc shape along a shape of the communication portion on the inner opening side. The surface plate is formed in a rectangular shape,
The frame material is composed of a linear outer peripheral frame material that is substantially the same as the length of each side of the surface plate, and a substantially L-shaped corner frame material in plan view that connects ends of the outer peripheral frame material,
The heat insulation panel according to claim 1, wherein the gas vent hole is provided at a corner of the corner frame member.

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