JPH0625818Y2 - Sealing device for heat insulation panel connection - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sealing device for a heat insulating panel connecting portion.

2. Description of the Related Art Generally, a joint material of a heat insulating panel connection part in an environment test chamber of a heat insulating panel assembly type, a quick freezer or a high temperature chamber is filled with a sealing material, but the heat insulating panel is made of a pair of metal such as aluminum. It has a so-called sandwich structure in which a heat insulating material such as polyurethane foam is filled in the middle of the surface plate, and the surface plate shrinks or expands due to a sudden temperature change in the refrigerator, and the sealing material in the joints is pulled or compressed. Force of.

However, conventionally, as shown in FIG. 2, for example, joint portions (23) of two heat insulating panels (21) (22) connected to each other have been conventionally used.
Simply place the sealing material (2
Sealant (25) as it is only filled with 5)
Adheres to the entire inner surface of each void (24),
Therefore, the adhesive surface of the sealing material (25) becomes complicated, and when the above-mentioned tensile force is applied to the joint portion of the heat insulating panels (21) and (22) due to the contraction of the surface plate, as shown in the figure, A force in a complicated direction acted on the sealing material (25), which could not fully utilize the elongation of the sealing material (25) itself, resulting in cracking. When a crack is generated in the sealing material (25) in this way, the gas in the refrigerator such as cold air leaks, the airtightness cannot be maintained, and there is a problem that the performance as an environmental test chamber, a quick freezer or a high temperature chamber is significantly reduced. there were.

The object of the present invention is to solve the above-mentioned problems of the prior art, to fully utilize the elasticity of the material of the sealing material itself, and to prevent the joints of the heat insulation panel from being connected regardless of the contraction and expansion of the surface plate. Another object of the present invention is to provide a sealing device for a heat insulating panel connecting portion that can reliably seal and keep airtightness in a room or a refrigerator for a long time.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention has a concave fitting member arranged on the connecting end surface of one of the heat insulation panels to be connected to each other, and the front and rear surfaces of the panel are connected to each other. The end portion of the face plate is folded back and hooked to both front and rear edges of the concave fitting member, and convex fitting members having outer folding edges are arranged on both front and rear sides of the other panel. The end of the surface plate is folded back and hung on the outer folded edge of the convex fitting member, and the concave and convex fitting members of both heat insulating panels are fitted to each other to form a joint portion, Sealing material-filling voids having a substantially T-shaped cross section with a narrow opening and a wide inner portion are formed on both front and rear sides of the joint, and the openings are formed on the void-side surfaces of both side walls of the convex fitting member. The non-bonding surface of the sealing material facing the Sealing material is filled in the gap so as to leave spaces for expansion and absorption of the sealing material on both the left and right sides of the back, and the sealing material is provided on both the left and right sides of the opening and at the back facing the non-adhesive surface. The gist is a sealing device for a heat insulating panel connecting portion, which is adhered to the front or rear side surface.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

In this specification, front and rear and left and right are based on FIG. 1, the front means the lower side in FIG. 1, the rear means the upper side, the left means the left side in the figure, and the right means the right side. And

Referring to FIG. 1 showing an embodiment of the present invention, a heat insulating panel (1) (2) constituting a side wall of an environmental test chamber and the like has a pair of aluminum surface plates (3) (3) arranged opposite to each other. , Both face plates
(3) (3) A heat insulating material (4) such as polyurethane foam interposed between the two members, and an uneven fitting member (5) (6) fitted to the connecting end faces of the panels (1) and (2), respectively. It is composed of and. In this embodiment, on one of the connecting end faces of the two insulating panels (1) (2) to be connected to each other, a concave fitting member (5) having a U-shaped cross section is fitted on the other, and The convex fitting members (6) having the outer folded edges (6a) (6a) on both sides are fitted respectively, and the surface plate (3) of one panel (1).
The end of (3) is folded back so that both edges (5
a) (5a), the other side panel (2) face plate (3)
The end portion of (3) is folded back and hooked on the outer folded edge portions (6a) (6a) on both sides of the convex fitting member (6).

And the concavo-convex fitting members (5) (6) of the two heat insulation panels (1) (2)
The joint portions (7) are formed by fitting the two together.

On both front and rear sides of the joint (7), both side edges (5
a) (5a) and the convex fitting member (6) on both sides of the outer folded edges (6a) (6
A space (8) (8) for filling a sealing material having a substantially T-shaped cross section is formed between (a) and the opening (8a) (8a) is narrow and the back (8b) (8b) is wide, Voids on both side walls (6b) (6b) of convex fitting member (6)
(8) A polyethylene tape with a thickness of about 1 to 2 mm is attached to the surface on the (8) side in the longitudinal direction of the voids (8) (8),
A sealing material non-bonding surface (10) is formed so as to face the opening (8a) of (8).

The sealing material (11) filled in each void (8) is abutted against the non-adhesive surface (10) (not adhered, the sealing material (11) is Opening in (8) (8a)
It is adhered only to both the left and right side surfaces and the front or rear side surface of the inner part (8b) facing the non-bonding surface (10). In addition, each void
Spaces are left on the left and right sides of the inner part (8b) of (8) so as to absorb the expansion of the sealing material (11).

Here, as the sealing material (11), a silicone sealing material or a urethane sealing material can be used, but it is preferable to use a one-component modified silicone sealing material made of a polyether polymer having an organosiloxane.

In the above, when the surface plates (3) and (3) of the heat insulation panels (1) and (2) contract, for example, due to temperature change, the sealing material (11) has a force to tear it to the left and right sides, as shown by arrows in the figure. However, the sealing material (11) does not work on the opening (8) of the void (8).
Since it is adhered only to both the left and right side surfaces of a) and the front or rear side of the inner part (8b) facing the non-adhesive surface (10), that is, only one side of the inner part (8b), the sealing material ( The elasticity of the material itself of 11) allows it to stretch sufficiently and does not cause cracks at all. And vice versa, insulation panels (1) (2)
If the face plate (3) (3) of the
Will be compressed especially inside the opening (8a) of each void (8), but the sealing material (11), as described above,
Since it is adhered to only one side of the back part (8b) of the void (8), it is deformed by its own elasticity and the back part (8b)
Inflate to both left and right sides of b). On the left and right sides of the back (8b),
Since the space is left, the expansion of the sealing material (11) can be absorbed, and therefore, as in the above case, the sealing material (11) does not crack at all. .

In the above embodiment, the invention is applied to the connecting portion of the heat insulation panels (1) and (2) that constitute the side wall of the environmental test chamber, etc., but the invention also configures the side wall and the ceiling. The same applies to the connecting portion of the heat insulating panel.

Advantageous Effect of the Invention As described above, the sealing device for the heat insulating panel connecting portion according to the present invention has the concave fitting member disposed on the connecting end surface of one of the heat insulating panels to be connected to each other. The end portion of the face plate is folded back and hooked to both front and rear edges of the concave fitting member, and convex fitting members having outer folding edges are arranged on both front and rear sides of the other panel. The ends of the surface are folded back and hooked on the outer folded edges of the convex fitting member, and the concave and convex fitting members of both heat insulating panels are fitted to each other to form joints and joints. Sealing material filling voids having a substantially T-shaped cross-section with a narrow opening and a wide inner portion are formed on both front and rear sides of the portion, and the openings are formed on the surfaces of both sides of the convex fitting member on the void side. Opposite sealing material non-adhesive surface is formed The sealing material is filled in the voids so as to leave a space for expansion and absorption of the sealing material on both the left and right sides of the inner part, and the sealing material opposes both the left and right sides of the opening and the non-adhesive surface. According to the present invention, when the surface plate of the heat insulating panel contracts due to temperature change, the sealing material is adhered only to one side of the inner part of the void. Therefore, the elasticity of the material itself of the sealing material allows the material to expand sufficiently, and cracks are not generated at all. On the other hand, when the surface plate of the heat insulating panel is stretched, the sealing material is bonded only to one side of the inner part of the void,
It is deformed by its own elasticity and expands to the left and right sides of the inner part. Since the space is left on both the left and right sides of the inner part, the expansion of the sealing material can be absorbed, and the sealing material is not cracked at all.

Therefore, in this invention, the elasticity of the material itself of the sealing material can be fully utilized, and the joint portion of the heat insulating panel connecting portion can be reliably sealed regardless of the contraction and expansion of the surface plate. Alternatively, there is an effect that the airtightness of the interior can be maintained for a long time.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a heat insulating panel connecting portion showing an embodiment of the present invention. FIG. 2 is a partial sectional view showing a conventional example. (1) (2) ... Insulation panel, (3) ... Surface plate, (5) ... Recessed fitting member, (5a) ... Side edge part, (6) ... Convex fitting member, (6a) ... Outer folded back Edge, (6b) ... Side wall, (7) ... Joint, (8) ... Cross section T
-Shaped sealing material filling cavity, (8a) ... opening, (8b) ...
Inner part, (10) ... Sealing material non-adhesive surface, (11) ... Sealing material.

Claims (1)

[Scope of utility model registration request] 1. A concave fitting member (5) is arranged on a connecting end surface of one panel (1) of the heat insulating panels (1) (2) to be connected to each other, and both front and rear sides of the panel (1) are arranged. The edges of the face plates (3) and (3) are folded back and hooked on the front and rear edges (5a) and (5a) of the concave fitting member (5), and the outer panel is folded back to the front and rear sides of the other panel (2). A convex fitting member (6) having edges (6a) (6a) is arranged,
Both ends of the front and rear surface plates (3) and (3) of the panel (2) are folded back and hooked on the outer folded edges (6a) and (6a) on both sides of the convex fitting member (6), and both sides are insulated. Concavo-convex fitting member (5) for panel (1) (2)
The joints (6) are fitted to each other to form joints (7), and opening portions are formed on both front and rear sides of the joints (7).
Sealing material filling voids (8) and (8) having a substantially T-shaped cross section are formed by narrowing the widths (8a) and (8a) and widening the depths (8b) and (8b). A sealing material non-adhesive surface (10) facing the opening (8a) is formed on the surface of the side walls (6b) (6b) on the side of the space (8) (8), and the space (8) (8) is formed. ), The sealing material (11) is
The left and right sides of the sealant (11) are filled so as to leave a space for expansion and absorption of the sealant, and the sealant (11) faces both the left and right sides of the opening (8a) and the inner part facing the non-adhesive surface (10). 8b) Sealing device for the insulation panel joint, which is adhered to the front or rear side.