JPH04197743A - Vacuum panel - Google Patents

Abstract

PURPOSE:To obtain material-saving, lightweight, industrially easily producible and easily handleable vacuum panel by a method wherein interval retaining members are molded integrally with outer plates at the predetermined intervals over almost the whole length of the panel concerned. CONSTITUTION:The vacuum panel concerned is constituted by integrally extrusion- molding interval retaining members 4 for producing hollows at the predetermined intervals 5 with outer plates 2 and 3 opposing to each other and, after sealing both ends, vacuumizing the hollows. The interval retaining members 4 are provided at the intervals, each of which is too narrow for the outer plates 2 and 3 to cave inside. In addition, holes 8 are provided for ventilation between the hollows adjacent to each other. The vent holes 8 are for discharging air from the respective hollows 5 partitioned by the interval retaining members 4 at evacuation and bored in a straight line from one side wall 6 towards the other side wall 7 of both the side walls. As the material for the vacuum panel concerned, extrusion-moldable material or aluminum, plastic material such as polyamide, polyimideor the like, FRP prepared by reinforcing plastic with fiber or the like is used. Thus, due to the reduction of the number of constitutional parts, the production becomes easy and the improvement of production efficiency, the reduction of production cost and the stabilization of quality of the vacuum panel concerned are contrived.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is applied to vacuum panels for the purpose of heat insulation, vibration isolation, and sound insulation, including sound insulation materials for floors, walls, and ceilings of buildings, pipes, and speaker boxes. It is used for etc.

(Problem to be solved by the invention! ii) In conventional vacuum panels, various materials such as honeycomb cores, studs, glass wool, powder, etc. are inserted into the hollow space as spacing materials to maintain the vacuum panel hollow. . This has resulted in drawbacks such as increased manufacturing costs, increased manufacturing time, and increased quality variation.

(Means for Solving the Problems) The present invention is intended to solve the above-mentioned problems, and saves money by cutting the spacing material at predetermined intervals almost the entire length ζ and molding it into one body with the outer panel. The purpose of the present invention is to provide a vacuum panel that uses materials, is lightweight, is industrially easy to manufacture, and is easy to handle.

(Structure) This will be explained with reference to FIGS. 1 and 2. The present invention is a vacuum panel characterized in that an opposing outer plate 2.3 and a spacing member 4 forming a hollow 5 at a predetermined distance are made into one body by extrusion molding, and both ends are sealed and evacuated. . The spacing members 4 are spaced so that the outer panel 2.3 does not recess inwardly, and the spacing members 4 are provided with holes 8 for ventilation of the adjacent hollow spaces. This vent hole 8 is for exhausting air from each hollow 5 divided by the spacer 4 during evacuation.
The holes are formed in a straight line from one side wall 6 to the other side wall 7 of both side walls. The side wall has a hole on only one side, and this hole is used here to attach the vacuum tube 10.

The thickness of the vacuum panel 1 and the thickness and spacing between the outer panel 2.3 and the spacing member 4 are determined depending on the application, usage conditions, material, and cross-sectional shape. Materials used include plastic materials such as aluminum, polyamide, polyimide, and polypropylene, and FRP made by reinforcing plastic with fibers, which can be extruded.

The sealing method is to paste rubber or metal on both ends of each hollow 5 with an epoxy adhesive, or to fill it with an epoxy adhesive as a sealing material 9.

(Function) A vacuum panel with this structure has a vacuum degree of 10 to 10 TO
I use it at LL, but at that time it weighs about 1 kg due to the outside air.
/ am is in a pressed state. In Figure 2, for example, if the spacing between the spacing materials is 5 gloss, then the opposing outer panels are pressed against each other by a force of 5 cvn, or 5 kg, per 11 lengths of the spacing materials. Become.

Heat will be explained in FIG. When the outer panel 2 receives radiant heat from above, a part of it radiates toward the outer panel 3. When the outer panel 3 receives this heat, part of it releases the heat downward in the same manner as when the outer panel 2 receives heat.

As shown in FIG. 2, since the hollow portion is in a vacuum state, there is almost no heat transfer through the air, and only solid conduction heat occurs. As for heat transfer within the solid body, when the outer plate 2 receives heat, the heat is conducted toward the spacing member 4, conducts from the spacing member 4 to the outer plate 3, and is released to the outside.

Regarding sound, referring to FIG. 2, the hollow section is in a vacuum state, so there is almost no sound energy transmitted through the air, and only solid-transmitted sound occurs. The transmission of sound within the solid body is such that when the outer panel 2 receives the sound, the sound energy is transmitted to the spacing material 4, from the spacing material 4 to the outer panel 3, and then transmitted to the surrounding area and becomes sound outside. released.

Spacing material 4 designed to deform with respect to vibrations
When the expected force acts on the vacuum panel, the outer panels 2 and 3 are pinched in addition to the entire vacuum panel being bent, and the spacing member 4 is deformed by buckling until the pressing force and the deformation stress are balanced. This deformation returns to its original position due to the stress in the material. In addition, if a part of the thickness is constricted like the spacing material 4A, bending vibrations can be absorbed as shown by the dotted line even in response to a weak force (Example). 1 kg/c of atmospheric pressure
When the force tries to dent inward due to the pressure of
The force acting between the spacing members 15 becomes smaller toward the center. Therefore, this acting force
It is designed to accommodate the thickness of 3.14 mm, making the vacuum panel lighter and reducing costs. Force acting on the outer plate 13.14 Correspondingly, the plate thickness at the joint between the spacing member 15 and the outer plate 13.14 is increased over the entire length of the spacing member, and as it approaches the center between the spacing members 15, It is a thinner version.

In Fig. 4, a V-shaped recess 24 is provided in the horizontal direction in a part of the spacing material 22, and although the shape is not specified as semicircular or U-shaped, the entire length of all the spacing material 22 is shown. It is molded to obtain the effect of vibration absorption. When a force within the deformation design is applied to the outer panel 2o from the outside in the direction of the outer panel 21,
In addition to the deflection of the entire vacuum panel, the outer panel 2o presses the spacing member 22, so the spacing member 22 deforms as shown by the dotted line 25 so that the V-shaped recess 24 is folded, and the outer panel 20. The recess 24 is deformed until the space between the recesses 21 becomes smaller and the pressing force and deformation stress are balanced. This deformation returns to its original position due to the stress of the material, but due to the force of inertia, the outer plate 2o
It deforms slightly so that the space between 21 and 21 bulges out. This deformation is repeated until the inertial force of the second part and the stress of the material become equal and converge.

FIG. 5 is for obtaining the effect of vibration absorption when heavy objects are loaded. A part of the spacer 30 has a hollow cross section, and although the shape is not specified as circular or square, it is molded over the entire length of all the spacer 30. When increasing the thickness of the spacing member 30 in accordance with the weight, the thicker the spacer, the more difficult it is to deform in the concave shape as shown in FIG. 4. Since it is necessary to reduce the thickness in order to absorb vibrations, a part of the spacing member 30 is made hollow to reduce the thickness. As a result, even if vibration is applied to the heavy object loaded on the outer plate 28, the hollow 32 can be deformed like the hollow 33 and absorb the vibration.

FIG. 6 makes it easier to attach other materials to the vacuum panel. Vacuum panel 35 on the wall of the building
When using the vacuum panel 35, it is usually hidden inside the wall.
Interior material 42.49 is used for visible parts. At this time, the interior material 42 can be attached using nails or wood screws 43, but if the outer panel 36 of the vacuum panel is located directly below the interior material 42,
Nails and wood screws cannot be used because they penetrate the outer panel of the vacuum panel, making installation difficult as adhesive is the only method available.

In order to eliminate this, upright members 39 are installed on the outside of the outer panel 36 of the vacuum panel on an extension of the spacing member 38, and the upright members 39 are connected while providing a hollow 40 at the necessary interval.
The face material 41 is integrally molded over the entire length. wood screw 43
When the interior material 42 is sandwiched and fixed to the face material 41, the wood screws 4
3 does not reach the outer panel 36, the interior material 42 can be attached without making a hole in the outer panel 36.
Further, in the case of a plate-shaped upright member 45, interior mounting is performed by attaching the member 47 to the upright member 45 with wood screws 48, and then attaching the interior member 49.

If vibration prevention is required, if the upright members 39 and 45 are integrated from the outer plate 36 between the spacing members 38, the outer plate 36 will be deformed in a concave manner, thereby making it possible to absorb vibrations.

FIG. 7: This is an example of a cylindrical vacuum panel, and FIG. 8 is an enlarged view of the end of FIG. 7. Both ends of the cylinder of the outer plate 51, 52 and the spacing member 53, which are integrally fixed by extrusion molding, are
The spacer 53 is removed and the ventilation hole 5 is inserted between the outer panels 51 and 52.
5 is formed, the outside of the outer panels 51 and 52 is sealed with a sealing material 54, and a vacuum tube δ6 is provided in a part thereof, and the seal is cut after evacuation.

(Effects of the Invention) Among the various features of this vacuum panel, two are noteworthy. The first is that it is easy to manufacture, and the second is that it has a large vibration absorption effect.

Regarding ease of manufacture, the vacuum panel of the present invention does not require any hollow parts. This is because the spacing material, which is extruded integrally with the outer panel, inevitably creates a hollow space corresponding to its height. Therefore, there is no need for spacing materials as parts, and the number of component parts is reduced, making manufacturing easier, improving production efficiency, reducing costs, and stabilizing quality.

Regarding heat, it has high heat insulation properties because it does not transfer heat through air convection like common insulation materials such as glass wool or foamed plastic.

Regarding sound, the energy transfer between the front and back of the vacuum panel is only solid transmission to the opposing outer panel through the spacing material, so compared to sound insulating materials based on mass, it has a wide range of frequencies despite being lightweight. It is highly effective for

The features of the present invention are low frequency vibrations that other vacuum panels do not have,
It also has the effect of absorbing high-energy vibrations accompanied by shocks. Conventional vacuum panels have spaced supports made of metal or high-density material in the hollow part, and are visible from the outside.
Since it is pressed with a force of kg/cTn, the outer plate itself is in a state where it is difficult to vibrate. Therefore, when vibrations are transmitted to one side, they are not absorbed by the vacuum panel itself, and almost all of the vibrations are transmitted to the other side, resulting in almost no vibration-proofing effect.

In contrast, in the present invention, by making the spacing material easily deformable, the outer plate and the spacing material are integrated,
Since the vacuum panel is structured so that its thickness changes in response to external vibrations, it has an anti-vibration effect that efficiently absorbs vibrations ranging from weak to strong vibrations. Therefore, it exhibits a remarkable effect on low-frequency noise from airplanes, automobiles, factories, etc., and also against sounds with large amplitudes such as from building floors and impacts.

The vacuum panel of the present invention having such an effect can be used for two-dimensional purposes such as sound insulation and heat shielding boards for machines, floors, walls, ceilings of buildings, partition panels, soundproof doors, etc., as shown in Figure 7. Similarly, vacuum panels are made into cylindrical shapes and used for water supply and distribution pipes and various other types of pipes.

[Brief explanation of the drawing]

Fig. 1 is an overall view of a vacuum panel with a large number of spacing members. Fig. 2 is an enlarged view of a portion of Fig. 1. Fig. 3 is an enlarged view of a portion of Fig. 1 that has been changed in shape. Fig. 4 is a partially recessed view. Figure 5 is an enlarged view of the spacing (partially enlarged view with a part of the retainer material hollowed out). Figure 7 is a cylindrical vacuum panel Figure 8 is a partially enlarged view of Figure 7 1...Vacuum panel 2.3.13.14.20.21.28.29.36.
37.51.52... Outer plate 4.4A, 15.24.30.38.53... Spacing maintained 10 years old

Claims (1)

[Claims] A vacuum panel that seals the open end of a hollow body in which a spacing material is integrated with an opposing outer panel over almost the entire length of a predetermined interval, and has a ventilation hole that connects the hollow space partitioned by the spacing material.