JP3065513B2 - Insulation panel joint structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating panel in which an inner panel, an outer panel, and a heat insulating material between them are integrated with each other. The joint structure of the heat insulating panel to join the heat insulating panel to the other structural member, and is used in a joint portion of the heat insulating panel in a container requiring heat insulation such as an environmental test device, a heat treatment device, and a refrigerator, It is effectively used for thermostatic chambers and the like that perform a temperature cycle test with a large change range between low temperature and low temperature.

[0002]

2. Description of the Related Art A conventional joint structure of a heat insulating panel is, for example, as shown in a joint structure of a wall panel and a floor panel in FIG.
Both end portions of the end member 14 ′ of the wall panel 1 in which the inner and outer panels 11 and 12 and the heat insulating material 13 are joined are brought into contact with the end member 24 ′ of the floor panel 2, and the contact surfaces are formed by the inner and outer seal members 3 ′ and
4 'seals. Such a structure is easy to assemble because the fitting portions are separated, the sealing work after assembling is easy, and the manufacturing cost is low. Are suitable.

However, according to this structure, when the constant temperature bath or the like is not used, there is not so much temperature difference between the inner and outer plates 11 and 12, so that the end members on both sides in the thickness direction come into contact with each other and the wall panel is formed. Although it favorably supports its own weight and the like, in a use condition such as a thermostat, the interior plate 11 expands or contracts due to high or low temperature inside, and a considerable difference in length between the interior plate 11 and the exterior plate 12 occurs. . As a result, as shown in FIG. 11, either the outer panel 12 side or the inner panel 11 side rises from the support surface, and when the amount of deformation of the panel is large, deformation exceeding the allowable limit of elongation of the sealing material occurs. ,
The seal member 3 'or 4' breaks.

Further, since the heat insulating panel is usually formed by foaming a resin between the inner and outer panels or by bonding a molded heat insulating material to the inner and outer panels, the inner and outer panels and the heat insulating material are integrally formed. And has a certain degree of bending rigidity as a whole. Therefore, if the length between the inner and outer panels becomes uneven due to thermal expansion, the inner and outer panels 1 and 2 and the ceiling panel 5 are warped as shown in FIG. On the other hand, the heat insulation panel is not usually a strength member such as a thermostat, but its own weight and other external forces are applied. When a vertical force is applied to only one of the inner and outer panels in a state in which the panel is warped in this way, the bonding between the panel and the heat insulating material is separated or the bonding is insufficient, and the panel is integrally formed. When the bending stiffness is low, the panel to which the vertical force is applied is easily broken. That is, in the conventional heat insulating panel joining structure,
The supporting state of the panel deteriorates.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, and even when the temperature difference between the inner and outer panels becomes large, the seal member is hardly broken, and the supporting state of the heat insulating panel is improved. An object of the present invention is to provide a joint structure of a heat insulating panel that is maintained.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a heat insulating panel including an inner panel, an outer panel, and a wall panel in which a heat insulating material is integrated therebetween. In a joint structure of a heat insulating panel in which a member is sealed with an inner seal member and an outer seal member to join the heat insulating panel to the other structural member, the end face portion of the wall panel in the up-down direction and the other structural member And an inner space portion and an outer space portion respectively provided between the inner seal member and the outer seal member, and provided at the end face portion and the other structural member of the wall panel in the vertical direction. A contact surface that forms a rotatable support relationship for the resulting load and is less than half of said end surfaces
And a contact surface provided so that the center of rotation is formed at a fixed position within a range close to the center of the thickness of the wall panel.

[0007] Other structural members that are joined to the thermal insulation panel are:
Usually, the heat insulating panel has a similar structure, but may be a different structural member. A strong molded member made of metal, resin, etc. is usually fixed to the end surface of the heat insulating panel. However, when the heat insulating material has a certain strength and the supporting load is light, such a molded member is used. Since it may be omitted,
The present invention can be applied to any of these structures.

The space in which the seal member is interposed is different from a gap which is unavoidably generated between conventional heat insulating panels and is sealed, and has a certain height so as to reduce expansion and contraction distortion of the seal member. It is a space. “Interposed” means a normal sealing method attached to both the end face and other structural members by bonding, as well as an attachment method such as press fitting.

[0009] The contact surface forming a rotatable support relationship between the vertical end surface of the wall panel and other structural members may be provided at one location including the central portion of the thickness, or at a plurality of locations on both sides of the central portion. It may be provided. It is generally desirable that the center of rotation is located at or near the center of the thickness.

[0010]

According to the invention of claim 1, of the insulating panel
Between the vertical end surface of the wall panel and the other structural member, an inner and outer space portion that interposes the inner and outer seal members,
Since the end surface and the other structural member are provided with a contact surface that forms a rotatable support relationship, if the end surface rotates while being supported by the other structural member, the space between the inner and outer space portions changes. As a result, for example, the inner space is narrowed to compress the inner seal member, and at the same time, the outer space is expanded to expand the outer seal member. In this case, if the height of the space is appropriately designed, the compression or tensile strain of such a sealing member can be kept within the allowable value of the material.

The center of rotation of the contact portion is formed at a fixed position within a range close to the center of the wall panel thickness.
Is so formed by vignetting contact surfaces Runode, interval space by rotation of the end surface portion is approximately the same degree change. Therefore, in a device in which such a joint structure of wall panels is used, a temperature difference is generated between the inner and outer panels, which causes a difference in length, and when the end face is inclined, the inner and outer seal members accompanying the inclination are inclined. The deformation is bisected, resulting in approximately the same amount of elongation and contraction. As a result, large deformation of only one of the inner and outer seal members is prevented, and the seal member is less likely to break.

Since there is a space in both sides of the wall panel in which the sealing member is interposed, the inner and outer panels on both sides are directly upper and lower.
No directional force is applied, and a force is exchanged between the wall panel and other structural members at the contact surface. As a result, the deterioration of the panel support state in which a vertical load is applied to only one side of the inner and outer panels is prevented.

[0013]

FIG. 1 shows an example of a joint structure of a heat insulating panel.
The joint structure of the heat insulating panel is, for example, a test chamber 100 of a thermostatic chamber.
Interior panel 11 as outside panel facing side and outside world 200
The exterior panel 12 as an outer panel facing the side, the heat insulating material 13 therebetween, and the wall panel 1 as an insulating panel in which an end member 14 as an end face provided around these are integrated, A floor panel 2 as another structural member is sealed with an inner seal member 3 and an outer seal member 4, and the wall panel 1 is joined to the floor panel 2.
The floor panel 2 also includes inner and outer panels 21 and 22, a heat insulating material 23, and an end face member 24, and has the same heat insulating panel structure as the wall panel 1.

Inner / outer space portions 3a, 4a are provided between the wall panel 1 and the floor panel 2 with the inner and outer seal members 3, 4 interposed therebetween, and the end members 14 and 24 are rotatably supported between the panels. Contact surfaces 14a and 24a forming a relationship are provided. The contact surfaces 14a and 24a have an arc-shaped cross section in the present embodiment, and the center of curvature is on a line L indicating the center plane of the thickness of the wall panel 1. The contact surface 14a is on the rotating side, and the center of curvature of the contact surface 14a is located at the point O on the line L. The end surface member 14 of the wall panel 1 is subjected to a vertical load such as the weight of the wall panel 1 and the weight of the ceiling panel (not shown) applied thereto.
These are the contact surfaces 14a of the floor panel via the contact surfaces 14a.
Supported by With such support, a seal interval h is formed so that both the inner and outer seals 3 and 4 can be deformed.

[0015] The inner and outer plates 11, 12 are usually 1 mm thick.
It is made of the following metal plate such as stainless steel. Insulation material 13
Is made of urethane or the like foamed between the inner and outer panels, and usually has a thickness of several tens of millimeters. Since these are integrated in close contact with each other, the wall panel 1 has a certain degree of bending rigidity as a whole. The inner and outer seal members 3, 4
It is made of special rubber or resin and is firmly bonded to both sides to be sealed. The allowable value of distortion of the sealing material due to compression, tension, and the like is usually within 10 to 20%. The end face member 14 is a molded product made of resin, metal, or the like having a sufficient thickness, and has a strength capable of integrally supporting the interior and exterior plates 11 and 12 and the heat insulating material 13.

FIG. 2 schematically shows an enlarged deformation state of the heat insulating panel when the temperature inside the test chamber 100 is increased by using a constant temperature bath or the like for performing a temperature cycle test or the like. FIG. 3
Shows the state of displacement of the end face member at that time. A ceiling panel 5 and a floor panel 2 are in contact with the top and bottom of the wall panel 1. When the temperature inside the test chamber 100 becomes high, the interior board 11 becomes hot and expands, but the exterior board 12 does not rise so much.
Maintain almost the original length. Assuming that the total elongation of the interior board 11 is s and the heat insulating panel 1 is deformed symmetrically in the vertical direction, the interior board 11 is moved from its initial position to s / at the lower end on the interior board 11 side, as shown by a dashed line. 2 and tends to compress the inner seal member 3 by that much.

However, the support point of the wall panel by the floor panel is the position of the central portion P (the actual position shown in FIG. 1 is shown upward for convenience), and this position cannot be changed in the vertical direction. On the 11th side, it extends downward by s / 4, which is almost half of s / 2, and the exterior plate 12 side lifts up by s / 4, absorbing the difference in length s / 2 between the inner and outer panels while maintaining the support position P. I do. As a result, the sealing member 3,
4 are compressed and expanded by s / 4, respectively, and the deformation amount is reduced to の of the deformation amount of the inner panel. Therefore,
The seal member is less likely to break, and the stress generated in the seal member is reduced, thereby extending the life of the seal member.

In the actual design, the distortion (s / 4) / in which the inner and outer seal members 3 and 4 take into account the elongation or shrinkage s / 4 calculated from the dimensions, shape and material of the heat insulating panel. h does not exceed the allowable limit of the sealing material used.

Since the ceiling panel 5 rests on the wall panel 1, the ceiling panel 5 can freely move up and down by the expansion and contraction of the wall panel 1. However, since the contact relationship between the wall panel 1 and the ceiling panel 5 is the same as the contact relationship between the wall panel 1 and the floor panel 2, the contact state between the two is caused by the load generated in the vertical direction such as the weight of the ceiling panel 5. Is maintained, and the upper and lower inner and outer seal members 3 and 4 deform similarly to the lower and inner seal members 3 and 4. At this time, the upper support point P ₁ is at the position of P ₁ ′ that extends upward by the extension s / 2 of the central portion of the wall panel 1. Actually, the wall panel 1 is bent in a convex shape toward the test chamber 100 due to the extension of the interior board 11, so that the support point P ₁ ′
Is a little lower.

When the temperature of the test room 100 becomes low, the interior plate 11 shrinks. At this time, the end face member 1
4 is the same as above except that the rotation direction is opposite, so that the description is omitted.

Note that, depending on the test conditions in the thermostat, the temperature difference between the test chamber 100 and the outside 200 may be considerably smaller when the temperature in the test chamber 100 is low than when it is high. . In such a case, when the rotation center is located at the center position of the thickness of the wall panel, in the outer seal member 4, distortion due to elongation is larger than distortion due to contraction. Therefore, the outer seal member 4 may be interposed in the space 4a in a state where a compressive strain is applied in advance to reduce the maximum elongation strain. In addition to this, the center of rotation may be slightly shifted inward from the position of the center point P to reduce the maximum strain in tension and compression generated in the inner and outer seal members 3 and 4. Further, in the case where the resistance to fracture and the durability against distortion are different between the contraction side and the extension side depending on the properties of the sealing member, the position of the rotation center may be slightly shifted from the center.

FIG. 4 shows a joint structure between the wall panels 1.
Also in this case, between the wall panels 1, 1, the inner and outer space portions 3 a, 4 a with the inner and outer seal members 3, 4 interposed therebetween and the end face member 1
Four contact surfaces 14a, 14a are provided, and the inner and outer seals 3, 4 are deformed in the same manner as in FIG.

5 to 9 show another embodiment. In FIG. 5, the contact surface 14a of the wall panel 1 is concave and the floor panel 2
Are made convex, and these are brought into contact in a planar state. In this case, when the wall panel 1 is bent by thermal deformation, one end of the planar contact surface becomes the support point P and becomes the center of rotation. Therefore, it is better that the interval between the planar portions is small. However, according to this structure, the amount of deformation of the inner and outer seal members 3 and 4 is slightly different depending on the bending direction of the wall panel 1. A structure having two support points is effective.

FIG. 6 shows that the end members 14 and 24 of the wall panel 1 and the floor panel 2 are made flat, and contact surfaces 14a and 24a having an arc-shaped cross section are provided at the center portion. In this example, the rotation is guided. If the end face member has such a structure, the bending rigidity in the width direction is reduced, but there is an advantage that the same shape can be used for all of the wall panel, the floor panel, and the ceiling panel. Further, since the center of rotation is the center of the thickness of the wall panel 1 and is at the point O on the same plane as the inner and outer seal members 3 and 4, the seal member is substantially subjected to only pulling or compression and not to shearing. Therefore, the stress state of the seal member is improved.

FIG. 7 shows an example in which the contact surfaces 14a and 24a for allowing the wall panel 1 to rotate are not provided at the center of the inner and outer plates 11 and 12, but are provided at two positions away from the center. Also in this case, the center of curvature of the contact surface 14a, that is, the center of rotation, is the point O of the center line L of the cross section. Note that the contact surface 24 does not necessarily have to be located symmetrically from the center.
Further, a convex or concave curved surface having a partially provided cross section may be used.

FIG. 8 shows an example in which the contact surfaces are provided at two places on both sides of the sealing surface and near the both sides of the center line L as uneven portions 14a-1 and 24a-1 and 14a-2 and 24a-2. Show. By doing so, the length of the end members 14 and 24 in the thickness direction is increased, so that heat transfer between the inside and the outside due to conduction through the end members can be reduced, and the rigidity of the end members in the width direction is increased. can do.

FIG. 9 is a sectional view showing two uneven portions 14 shown in FIG.
An example is shown in which a-1 and 24a-1 and 14a-2 and 24a-2 are provided, and a rotation guide portion 24b is provided at the center. In this way, the conduction heat is reduced and
The inner and outer seal members 3, 4 can be uniformly deformed only in the tension and compression directions.

[0028]

As described above, according to the present invention, a heat insulating panel is provided.
An inner and outer space portion in which a sealing member is interposed is provided at an end surface of the wall panel in the vertical direction , the distortion of the sealing member can be adjusted by the width of this space portion, and the position near the center of the wall panel thickness is centered. The synergistic effect of the combination of providing a contact portion that allows the end face to rotate as a half, halving the displacement of the spacing between the space parts when the wall panel is bent and the end face rotates, and halving its absolute value Accordingly, distortion of the inner and outer seal members when a difference in thermal expansion occurs between the inner and outer panels can be significantly reduced as compared with the related art. As a result, the seal member is less likely to break or break due to tension or compression, the stress itself generated in the seal member is reduced, and the life of the seal member is extended. As a result, the durability of the device itself using the joint structure of the heat insulating panels such as a thermostat is also improved.

Further, since there is no seal leakage due to breakage of the seal or the like, conduction between the inside and outside atmosphere is lost, disturbance of the inside atmosphere and an increase in load on the air conditioner are eliminated, and energy saving is achieved. The occurrence of dew condensation and frost is also eliminated, and the occurrence of dew condensation and the like in the test chamber is prevented in the high temperature and high humidity test.

Since the deformation of the seal portion is halved and the seal height can be designed and adjusted, it is possible to use a large-sized wall panel while maintaining the distortion of the seal member within an allowable limit. As a result, the number of panels used in the entire apparatus is reduced, the seal length is reduced, the amount of sealing material and the amount of work for sealing are reduced, and the manufacturing cost of the apparatus is reduced. Further, it is possible to widen the operating temperature range of the device, and the range of application of the device is expanded.

Further, when the wall panel is deformed due to thermal stress,
Since the supporting points are not biased only to both ends in the thickness direction of the panel, the supporting state is improved, and the effect of preventing the occurrence of distortion in the inner and outer panels is also produced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a joint structure of a heat insulating panel of an embodiment.

FIG. 2 is an explanatory diagram of a deformed state of inner and outer seal members.

FIG. 3 is an explanatory view of the movement of the end face member and the deformed state of the inner and outer seal members.

FIG. 4 is a cross-sectional view showing a joint structure of a heat insulating panel according to another embodiment.

FIG. 5 is a cross-sectional view showing a joint structure of a heat insulating panel according to still another embodiment.

FIG. 6 is a cross-sectional view showing a joint structure of a heat insulating panel according to still another embodiment.

FIG. 7 is a cross-sectional view showing a joint structure of a heat insulating panel according to still another embodiment.

FIG. 8 is a cross-sectional view showing a joint structure of a heat insulating panel according to still another embodiment.

FIG. 9 is a cross-sectional view showing a joint structure of a heat insulating panel according to still another embodiment.

FIG. 10 is a cross-sectional view showing a conventional heat insulating panel joining structure.

FIGS. 11A and 11B are explanatory views showing a state in which a sealing member in a conventional joint structure of a heat insulating panel is broken.

FIGS. 12A and 12B are explanatory diagrams showing a state of thermal deformation of the heat insulating panel.

[Description of Signs] 1 Wall panel (heat insulating panel) 2 Floor panel (other structural members) 3 Inner space portion 3a Inner seal member 4 Outer space portion 4a Outer seal member 5 Ceiling panel (other structural members) 11 Interior plate ( Inner panel) 12 Exterior plate (outer panel) 13 Insulation material 14 End member 14a Contact portion 24a Contact portion

Claims (1)

(57) [Claims] An end surface of a heat insulating panel including a wall panel in which an inner panel, an outer panel, and a heat insulating material therebetween are integrated is sealed to another structural member by an inner seal member and an outer seal member. In the joint structure of the heat insulation panel which joins the heat insulation panel with the other structural member, the inner seal member and the outer seal member are provided between the vertical end surface of the wall panel and the other structural member. And an inner space portion and an outer space portion interposed therebetween, and a contact surface provided on the end face portion and the other structural member of the wall panel to form a support relationship rotatable with respect to the load generated in the vertical direction. contact a central half consists of a smaller portion rotation of said end surface portion is provided so as to be formed at a fixed position within the range of positions close to the center of the thickness of the wall panel in Junction structure of the insulating panel, characterized in that it comprises a and.