JPS6120232Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealing device for preventing leakage when a heat insulating material made of hard urethane foam is injected and foamed between front and back plates.

Generally, insulating rain shutters filled with hard urethane foam have front and back panels placed opposite each other at a predetermined distance, and
A manufacturing method is known in which hard urethane foam is injected and foamed into a hollow space formed almost like a closed chamber with frame material attached to the periphery, but in this method, when the urethane foam is foamed, there is a small amount of contact between the front and back plates and the frame material. There is a risk that the urethane foam may leak out from the gap. Therefore, it is conceivable to fit all four peripheral edges of the front and back plates into a bento box shape to prevent leakage during injection and foaming, but the front and back plates must be flat and have poor changeability. Therefore, if vertical ribs are formed on the front and back panels to give a three-dimensional change, the expected portions of the front and back panels that will have vertical ribs will still need to be supported by frame materials, so the sections that will have vertical ribs on the front and back panels will need to be supported by frame materials. In an attempt to prevent leakage during injection foaming by interposing a thin sealing material made of soft urethane foam over almost the entire surface of the section, this sealing material alone prevents leakage from the prospective section with vertical ribs and the four corners of the insulating rain shutter. could not be completely prevented.

Therefore, it is also proposed to use a sealing material that is thick enough to prevent leakage, but in this case, the thick sealing material is compressed and crushed while applying the frame material to the top and bottom of the front and back panels. The disadvantage is that the hard urethane foam and the frame material cannot be bonded together because the injected hard urethane foam does not completely penetrate the thick sealing material. It was hot. In addition, since the hollow part formed between the front and back plates is not supported at all, the central part of one of the upper front and back plates will bend downward due to the weight of the material, and the upper plate will bend downward during injection foaming. This resulted in defective products being produced due to misalignment or foaming without fully restoring the deflection, making it impossible to produce high-quality shutters with high efficiency.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to separate and oppose a front plate and a back plate on which vertical ribs are formed, and to separate the upper and lower and left and right side edges of the front and back plates. In an insulating rain door, the upper and lower horizontal stile members are fitted into the grooves of the upper and lower horizontal stile members and the left and right vertical stile members to form a hollow part, and the above-mentioned upper and lower horizontal stile members are formed by injecting and foaming a hard urethane foam into the hollow part. A thin sealing material with a notch for injecting hard urethane foam is interposed on the entire inner bottom of the groove, and the four corners of the front and back plates, the center of the upper and lower side edges, and the By partially overlapping and interposing small pieces of thick auxiliary sealing material within the interval between the vertical rib forming parts and fitting the front and back panels, the front and back panels of the insulating storm door can maintain a predetermined distance. In addition to making it easier to inject and foam hard urethane foam, it also completely prevents leakage to the outside during injection foaming.Moreover, since the injected liquid penetrates into the thin sealing material, the front and back panels of the frame material are firmly bonded. can do. The present invention also provides a sealing device for an insulating storm door that can efficiently produce high-quality insulating storm shutters of a predetermined thickness.

The structure of the present invention will be described with reference to an embodiment shown in the drawings. Reference numeral 1 is an insulating rain door, and an outdoor side surface plate 2 and an indoor side back plate 3, which constitute the insulating rain door 1, are respectively Both left and right edges are bent inward and overlapped and fitted into each other. There are vertical ribs 1a near both left and right ends of the front and back panels 2 and 3 of the insulating storm door 1 for locking with the vertical frame material 4, and the front panel 2 is provided with several vertical ribs 1b approximately in the center. The center portion of the back plate 3 is formed thinner than both side portions. Reference numerals 5 and 6 are the upper and lower stile materials of the insulating storm door 1, and a thin sealing material 7 made of soft urethane foam is preliminarily applied over the entire surface of the inner bottoms of the grooves of the upper and lower stile materials 5 and 6. It is interposed. That is, the thin sealing material 7 has a shape that corresponds to the cross section of the insulating shutter 1, 7a is a cut portion cut at both left and right edges of the thin sealing material 7, and 7b is a cut portion cut at the center of the thin sealing material 7. This is the cutting part for the injection hole. Reference numeral 8 denotes a thick auxiliary sealing material interposed in the gap between the four corners A of the front and back panels 2 and 3 of the heat insulating storm door 1, and has a concave cutout at a position corresponding to the vertical rib 1a. Reference numeral 9 denotes a thick auxiliary sealing material which is interposed within the interval between the center position B of the upper and lower side edges of the front and back plates 2 and 3. Rectangular pieces are assembled from the left and right sides, and both ends 9a are inserted. The end bonded portion of the central portion 9b corresponds to the cut portion 7b of the thin sealing material 7 at the central portion. In addition, 10 is a thick auxiliary sealing material for the front and back plates 2 and 3.
It is interposed within the interval between vertical rib positions C on the upper and lower side edges of and is formed into a rectangular parallelepiped shape. and,
These auxiliary sealing materials 8, 9, and 10 are thicker than the sealing material 7, and leak from the vertical ribs etc. when the hard urethane foam 11 injected into the hollow part formed between the front and back plates 2 and 3 foams. However, in this example, the density is
When the hard urethane foam 11 of 30 to 35 kgm ³ is foamed, the thickness of the thin sealing material 7 is around 4 mm, while the thickness of the thick auxiliary sealing materials 8, 9, and 10 is 15 to 35 mm.
A 20mm one was used. However, insulated shutters 1
It goes without saying that the thicknesses of the thin sealing material 7 and the thick auxiliary sealing materials 8, 9, and 10 can be adjusted as appropriate depending on the shape of the urethane foam 11, the foaming conditions of the hard urethane foam 11, and the like.

Next, the operation of the present invention constructed as described above will be explained. First, in order to insert the thin sealing material 7 and the thick auxiliary sealing materials 8, 9, and 10 between the front and back plates 2 and 3, the thin sealing material 7 should be placed so that the upper and lower edges between the front and back plates 2 and 3 are in contact with each other. It is attached to the inner bottom of the groove of the upper and lower frame members 5 and 6. And thick auxiliary sealing material 8,
Thick auxiliary sealing materials 8 are placed on corresponding positions of, for example, the surface plate 2, which will be on the lower side during foaming, and the thick auxiliary sealing materials 9 and 10 are adhered via adhesive tape. At this time, the thick auxiliary sealing material 8 does not move because it has grooves corresponding to the vertical ribs 1a. After that, the upper back plate 3 is fitted so that the left and right edges overlap each other. In this way, the thick auxiliary sealing materials 8, 9,
10 is partially interposed within the interval between the four corners A of the front and back plates 2 and 3, the center position B of the upper and lower side edges, and the vertical rib position C of the same side edge. At this time, back plate 3
Since the center portion of is supported by the thick auxiliary sealing material 9, downward deflection is prevented.
Therefore, after an ideal injection hollow is formed with no bending in the center of the back plate 2, a predetermined amount of the stock solution of the hard urethane foam 11 is injected through an injection hole (not shown). The undiluted solution foams in the injection hollow part, but the foaming occurs while the hard urethane foam 11 is prevented from leaking by the thin sealing material 7 except for the four corners A of the insulating shutter 1 and the vertical rib position C of the upper and lower expected parts. . At this time, since the sealing material 7 is thick, the hard urethane foam 11 is attached to the thin sealing material 7.
It penetrates into the frame material and is integrally bonded to the upper and lower frame materials 5 and 6.
On the other hand, the hard urethane foam 11 penetrates into the thick auxiliary sealing materials 8, 9, and 10, but because of its thickness, it does not reach the upper and lower frame materials 5 and 6, but even if it does, the foaming pressure decreases and the four corners A, the hard urethane foam 11 does not leak out from the vertical rib position C.

During injection foaming, it goes without saying that the assembly assembled by the front and back plates 2, 3, etc. must be completely supported by a support member that can withstand the foaming pressure sufficiently to prevent deformation.

In summary, the present invention involves separating and opposing a front plate and a back plate on which vertical ribs are formed, and fitting the upper and lower, left and right side edges of the front and back plates into the grooves of the upper and lower horizontal frame members and the left and right vertical frame members. In an insulating rain door which is formed by forming a hollow part and injecting and foaming a hard urethane foam into the hollow part, a part of the inner bottom of the groove of the upper and lower horizontal frame members has a notch for injecting the hard urethane foam. A thin sealing material with a thickness of 100% is interposed over the entire surface, and small pieces of thickening material are partially applied to the four corners of the front and back plates, the center of the upper and lower side edges, and within the interval between the vertical rib forming portions of the same side edges. Since the sealing material is layered and the front and back plates are fitted together, the foaming pressure is weakened by the thick auxiliary sealing material in the four corners of the insulating shutter or in the areas forming the vertical ribs, where there is a lot of leakage during injection foaming. Furthermore, in other areas where there is less leakage, leakage can be prevented by using a thin sealing material, but because the sealing material is thick, the hard urethane foam adheres to the upper and lower frame materials. As a result, it is possible to form an insulating storm door in which the hard urethane foam, front and back panels, and upper and lower frame materials are completely integrated. Furthermore, the center portions of the front and back plates are supported by thick auxiliary sealing material so that either of the front and back plates located on the upper side does not bend and forms an approximately ideal injection hollow. Even if the injection foaming method is adopted, highly accurate insulating rain shutters can be produced with high efficiency.

[Brief explanation of the drawing]

The drawings show an embodiment of the sealing device for an insulating storm door according to the present invention, in which Fig. 1 is an overall perspective view, Fig. 2 is a sectional view, and Fig. 3 shows a thin sealing material and a thick auxiliary seal. It is an installation diagram of the material. In the figure, 1 is an insulated shutter, 1a and 1b are vertical ribs, 2
3 is the front panel, 3 is the back panel, 4 is the vertical frame material, 5 is the upper stile material, 6 is the lower stile material, 7 is the thin sealing material, 7a is the cut portion of both left and right edges of the thin sealing material, 7b is the thin seal A cut portion at the center of the material, 8, 9, and 10 are thick auxiliary sealing materials, 9a is an adhesive portion at both ends of the thick auxiliary sealing material, 9b is an end adhesive portion of the thick auxiliary sealing material,
11 is a hard urethane foam, A is the four corners of the insulating shutter, B is the center position, and C is the vertical rib position.

Claims (1)

[Scope of utility model registration request] A front plate and a back plate having vertical ribs formed thereon are spaced apart from each other, and the upper and lower and left and right side edges of the front and back plates are fitted into the grooves of the upper and lower horizontal frame members and the left and right vertical frame members to form a hollow part. In the insulating rain door formed by injecting and foaming hard urethane foam into the hollow part, a thin sealing material having a notch for injecting the hard urethane foam is provided in a part of the inner bottom of the concave groove of the upper and lower horizontal stile materials. The entire surface is interposed, and small pieces of thick auxiliary sealing material are partially overlapped and interposed in the four corners of the front and back plates, the center of the upper and lower side edges, and the interval between the vertical rib forming portions of the same side edges. A sealing device for an insulating storm door characterized by having front and back plates fitted together.