JP2003020875A - Sound absorbing door and method of sticking damping material to the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a panel member that is excellent in sound absorbing property and sound insulating property and used for the door of a repository or a partition wall, and to provide a method of closely adhering a damping material to the member. SOLUTION: The sound absorbing property and sound insulating property of the panel member 2 formed of a thin metallic sheet are improved by melt- sticking the sheet-like damping material 3 composed of an asphalt-based synthetic material to the rear surface of the member 2 so as to cover the whole area of the rear surface. In the method of closely adhering the damping material 3 to the panel member 2, the material 3 is placed on the rear surface 2b of the member 2 after paint for burning coating is applied to the front surface of the member 2. Then, after the material 3 is softened and the asphalt component near the member 2 is melted by utilizing the heat given to the member 2 at the time of applying the paint for burning coating, the material 3 is closely adhered to the rear surface 2b of the member 2 by solidifying the material 3 by cooling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique relating to sound deadening and sound insulation such as a partition wall for a storage such as a cabinet or an interior space, and a panel member which is a constituent member such as the storage or a partition for a panel type partition. The present invention relates to a technique for closely attaching a damping material.

[0002]

2. Description of the Related Art Up to now, a door of a storage such as a locker using a panel member formed of a thin metal plate has not been provided with sound deadening and sound insulation. On the other hand, as a conventional example of measures against noise and sound insulation of a partition wall for partitioning, for example, a method shown in FIG. 4 is known.

FIG. 4 shows a well-known honeycomb core 33 (a hollow core made of a paper material is formed so as to be continuous in a honeycomb shape on the inner surface of a panel member 30 formed of a metal thin plate, and this is formed in a direction orthogonal to the core. FIG. 3 is a perspective view of a panel member obtained by adhering a plate-shaped porous molded product (used as a cushioning material or the like) to form a panel member, the constituent members being developed and viewed obliquely from above. The panel member 30 has a structure that includes a flat rectangular plate 31 and a reinforcing end face portion 32 that surrounds the periphery at right angles in a strip shape and has rigidity, and the end face portion 32 is the main surface of the partition wall. It is used by fixing it by fitting it into a mounting portion formed around the.

The surface of the panel member 30 is first baked and coated, and then the one surface 33b of the honeycomb core 33 is cut according to the size of the inner surface 31a.
Adhesive on the inner surface 3 of the panel member.
Accurately position and abut on 1a. Then, the surface of the panel member 30 is placed on the surface plate downward, and the weight is placed on the other surface 33a of the honeycomb core 33 from above and pressed, and the panel member is held for about 10 hours until the adhesive dries. Has been completed.

[0005]

The production of conventional panel members for sound deadening / insulating walls requires many work steps such as application of an adhesive and adjustment of the honeycomb core, equipment such as a surface plate, and a large work area. It costs a lot of money because it spends a lot of labor and production lead time. Also,
A paper honeycomb core has a low density (that is, is light) and a high porosity, so it has a high sound transmittance and a low effect as a vibration damping material. There was a problem in sound insulation.

A first object of the present invention is to provide a storage compartment such as a locker or cabinet or a partition wall for partitioning, which is constructed by using a panel member formed of a thin metal plate.
It is an object of the present invention to provide a door or a partition wall made of a panel member having excellent sound deadening and sound insulating properties.

A second object of the present invention is to provide a method of bringing a damping material into close contact with a panel member, which is a constituent member such as a storage or a partition wall for panel type partition, in a short time and at low cost. is there.

[0008]

[Means for Solving the Problems] The point of the means for solving the above-mentioned problems is that in the panel of a door or a partition wall, a high-density damping material having excellent sound deadening and sound insulating properties is provided on the back surface of a metal panel member. The structure is in close contact, and the damping material may be heat-welded to the panel member without requiring any special treatment process or equipment. In the present specification, "made of thin sheet metal" means a metal that does not deteriorate or deform at a temperature of about 160 ° C. during baking processing, such as steel having a thickness of about 3 mm or less, aluminum alloy, or other lightweight alloy. It means the one molded in.

That is, the door and the panel of the partition wall are made of a sheet-shaped damping material made of an asphalt-based synthetic material, which is a highly dense material having excellent sound deadening and sound insulating properties.
A vibration damping material made of the asphalt-based synthetic material, which is made of a thin metal plate and has a rectangular flat plate panel and a reinforcing member that surrounds the rectangular flat plate and surrounds the periphery of the panel member so as to cover almost the entire flat plate portion. Is placed and adhered by a method of heat-welding simultaneously with the baking addition heat treatment of the coating material previously applied to the panel member.

In the method of heat-welding the damping material to the panel member, the damping material is placed on the back surface of the panel member whose surface is coated with the baking paint, and the panel member is heated during the baking treatment of the coating material. Then, simultaneously with this baking treatment, the vibration damping material is softened by the heat and the asphalt component in the vicinity of the panel of the vibration damping material is melted, and the vibration damping material is used as the adhesive. Due to its own gravity, it is cooled and solidified in close contact with the back surface of the panel member.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to claim 1 of the present invention is shown in FIG. 1, which shows a cross section of a front door portion of a storage such as a cabinet. The storage case 8 includes a box body 4 having an open front surface, door attachment members 5 and 5 attached to both side surfaces of the box body 4, and hinge mechanisms 6 and 6 fixed to the door attachment member 5.
And a pair of doors 1 and 1 attached to the hinge mechanism 6 via a pin 7 so as to be rotatable and openable and closable. The box body 4 and the door 1 are formed of a thin steel plate.

The door 1 is formed by bending a rectangular flat panel member 2 and its periphery inwardly, that is, at the side of the box body 4 at a right angle, and surrounds the periphery in a band shape to reinforce the door and provide rigidity.
and a sheet-shaped damping material 3 on the back surface 2b of the panel member 2 so as to cover almost the entire rectangular flat plate portion.
Is placed and closely adhered by a heat welding method which is performed simultaneously with the baking treatment of the coating material previously applied to the panel member.

Regarding the heat welding method of the damping material,
Since this embodiment is common to the other embodiments, it will be described in detail after the configuration description of the other embodiments.

Although there are various materials suitable for the vibration damping material, for example, an asphalt damping material manufactured by Nippon Sexo Industrial Co., Ltd. may be used. This damping material is a synthetic material obtained by kneading asphalt and damping filler at an appropriate ratio into a sheet having a thickness of several millimeters (the damping material used for the panel member according to the present invention is 1.2 to 6 mm). It is a molded material with the specific gravity of about 1.6, the softening temperature of about 100 ° C, and the melting temperature of the asphalt component of about 120.
It is a material that has excellent vibration damping performance at room temperature and is as flexible as a soft synthetic rubber sheet at room temperature, for example. It is a commercially available material.

A panel door such as a storage container collides with a box body or a door mounting frame when the door is closed, and the collision causes a noise or vibration which is jarring in a quiet office. As a measure against such noise and vibration, it is known that the thickness of the panel member is increased or another member is attached to the panel member to increase the mass and lower the natural vibration to give a low frequency sound. Such a method is not a good solution because it is not only costly but also increases in impact due to weight increase.

The damping material made of a sheet-shaped material made of asphalt-based synthetic material has the above-mentioned characteristics. According to the present invention, the damping material is brought into close contact with the inner surface of the panel member 2 formed of the metal thin plate as described above to form the door 1, so that the natural frequency of the door is reduced due to the addition of the mass to cause resonance. The sound deadening effect that suppresses the sound, and the increase in the sound transmission loss by sticking together soft materials with different densities, that is, the sound insulation effect,
You get the effect of both of them.

Next, FIG. 2 shows an embodiment according to claim 2 of the present invention. FIG. 2 shows a vertical cross section of a sound insulation partition wall that partitions the room. The partition wall for partitioning the office room, the partition for partitioning between the desks adjacent to each other in the office, and the partition for partitioning the personal space preferably have a structure excellent in sound insulation. Claim 2 of the present invention relates to the sound insulation used for such an application. Regarding the partition wall.

The partition wall 18 is a main body member 13 that maintains the strength and rigidity of the wall, an adjusting member 14 that is mounted and adjusted according to the height between the floor 16 and the ceiling 17 of the room, and both wall surfaces of the main body member 13. And the sound insulation panels 10 mounted in parallel with each other, and the upper end surface 15 of the main body member 13 is attached to the ceiling 1 of the room.
7 and the lower surface 14a of the adjusting member 14 is adjusted so that the lower surface 14a of the adjusting member 14 abuts on the floor, and the adjusting member 14 is attached so as to be stretched between the floor and the ceiling.

On the other hand, the sound insulation panel 10 is formed by bending a rectangular flat panel member 11 formed of a thin steel plate inwardly, that is, at a right angle to the side of the main body member 13 and surrounding the periphery in a band shape. The sheet-shaped damping material 12 has a rigid end portion 11a and is adhered to the back surface 11b of the panel member 11 by a heat welding method described later so as to cover almost the entire rectangular flat plate portion. It is a structure pasted together.

As the vibration damping material 12, the same asphalt-based synthetic material as the material described in the description of the embodiment (FIG. 1) according to claim 1 is used in the form of a sheet. Therefore, similar to the above, by adhering the damping material 12 to the back surface of the panel member 11 formed of a thin plate made of steel, it is possible to suppress the resonance due to the reduction of the natural frequency of the door due to the addition of mass, and the density. The effect of increasing the sound transmission loss by sticking together different soft materials, that is, the sound insulation effect, and both effects are obtained.

An embodiment according to claim 3 of the present invention is shown in FIG. FIG. 3 shows a perspective view of a constituent member of a panel door which is generally used and which is viewed from an oblique direction. The door front member 20 includes a panel member 21 made of steel and a rectangular flat plate, and a fitting portion 2 surrounding the panel member 21 at a right angle to the panel member 21.
2, that is, the door end surface portion, and the door back cover 24 has a symmetrical structure with the door front member 20, and has a steel panel member 25 and a fitting portion 26 around the panel member 25. Then, when the outer surface of the fitting portion 26 of the door back cover is fitted and pushed into the inner surface of the fitting portion 22 of the door front member, both members 20,
24 is a structure which unites and forms a closed panel door.

The damping material 23 is made of a sheet-shaped material made of the same asphalt-based synthetic material as described above, and is fitted to the size of the rectangular flat plate portion of the panel member 21 of the door front member 20, and one surface thereof is arranged. 23a to the back surface 2 of the door front member 20
It is adhered to 1a by a heat welding method described later. As for the door back cover 24, a damping material is brought into close contact with the rectangular flat plate rear surface of the panel member 25 (similar to the door front member 20) (the damping material for the door back cover is not shown in the figure).

In the case of such a closed type panel door, before the door back cover 24 is fitted to the door front member 20, the damping material is heated and brought into close contact with the door front member 20, and then the door back cover 24 is fitted. Complete a closed panel door.

Also in the case of this panel door, the vibration damping material 23 is a sheet-like asphalt-based synthetic material similar to that described with reference to FIGS. 1 and 2, and the same vibration damping effect and sound deadening effect can be obtained.

Next, a method of heating and welding the damping material to the back surface of the panel member or the door member in each of the embodiments will be described. The panel member constituting the door or the partition wall is first formed into the above-mentioned shape by press working, welding or the like, and after the surface is processed smoothly, the baking coating material is applied to the surface.

This paint for baking coating is a thermosetting paint which is distributed in the general market, and there are various kinds depending on the application.
It is a paint that has the properties of strength and luster by hardening when kept at a predetermined temperature for a predetermined time by heat treatment. In the case of the panel member according to the present invention, as the baking coating material, solvent-based melamine resin and acrylic resin coating material or epoxy resin used for powder coating is used, and the temperature during the baking treatment of this coating material is 160 to 180 ° C, holding time 20 ~
It is set to a range of 30 minutes.

On the other hand, the asphalt damping material has a softening temperature of about 100 ° C. and a melting temperature of the asphalt component of about 120 ° C. as described above. In order to properly melt the asphalt component of the vibration damping material, the temperature is about 130 to slightly higher than the above temperature.
It has been empirically proved that the temperature may be kept at 160 ° C. for about 20 to 40 minutes.

That is, the conditions under which these conditions overlap with the temperature and holding time during the paint baking process are the optimum processing conditions. From this fact, the heat welding temperature is about 160 ° C. and the holding time is about 20 to 40 minutes. By doing so, the heat-welding treatment of the damping material can be performed simultaneously with the baking treatment of the paint.

That is, with the back surface of the painted member facing upward, a sheet-shaped damping material made of asphalt-based synthetic material was placed on the back surface to adjust the position and shape, and the material was carried into the heat treatment apparatus as it was. To heat. The processing temperature at this time is 160
Optimum conditions are a temperature of 20 ° C. and a holding time of 20 to 40 minutes.

By this heating treatment, the baking treatment of the paint is completed. Simultaneously with this, the damping material placed on the back surface of the panel member is softened by the heat received from the panel surface, and due to its own gravity, the back surface of the panel. The asphalt component in the vicinity of contact with the panel is melted, and the asphalt component intervenes as an adhesive between the damping material and the back surface of the panel member.

Then, when heating is stopped and cooled from that state, the molten asphalt component is solidified and the damping material can be brought into close contact with the back surface of the panel member to integrate them. This type of welding can be performed more firmly than using an adhesive, and does not peel even if a vibration shock is applied under normal use conditions.

[0032]

In the present invention, since the asphalt type vibration damping material excellent in the vibration damping property and the sound deadening property is used as the vibration damping material,
Compared with the conventional honeycomb core, vibration damping and sound deadening effect are significantly improved, and the function of the product is improved.

Further, even in the case of bonding with the panel member, it is possible to heat-weld the panel member at the same time as the baking and painting process of the panel member. Therefore, it is necessary to apply the adhesive and keep the pressure for a long time by the weight on the surface plate. No such process and the equipment and workshop for it are required, and the production cost can be significantly reduced by shortening the production lead time and the equipment.

When a honeycomb core or the like is used as the damping material as in the conventional case, the double-sided panel must have a closed structure in order to prevent damage and separation of the damping material. Since it can also be used for unnecessary storage cabinets and cabinet doors, it is possible to realize a silence door at low cost.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a door portion of a storage, showing an embodiment according to claim 1 of the present invention.

FIG. 2 is a longitudinal sectional view of a partition wall showing an embodiment according to claim 2 of the present invention.

FIG. 3 shows an embodiment according to claim 3 of the present invention, and is a perspective view showing each constituent member of the sound deadening door in a developed manner.

FIG. 4 is a perspective view showing each constituent member in an expanded manner in an example of a conventional sound deadening door.

[Explanation of symbols]

1 door 2 panel members 2b back side 3 damping material 8 storage 10 sound insulation panel 11 panel members 11b back side 12 damping material 13 Partition wall body member 18 partition walls 21,25 panel member 21b back side 23 Damping material

Claims (4)

[Claims] 1. A sheet made of an asphalt-based synthetic material on a back surface of a panel member having a reinforcing member that surrounds a rectangular flat plate made of a thin metal plate at a right angle to the flat plate so as to cover almost the entire flat plate portion. -Like storage panel on which a vibration-damping material is placed, and the sound-damping panel is formed by the heat-welding of the paint applied to the panel member in advance and at the same time by heat-welding with the heat. Silencer door. 2. A sheet made of an asphalt-based synthetic material on a back surface of a panel member having a rectangular metal flat plate and a reinforcing portion which surrounds the rectangular flat plate at a right angle to the rectangular flat plate so as to cover almost the entire flat plate portion. -Shaped interior space in which a sound-damping panel is mounted on the wall by placing a vibration-damping material and heat-welding the paint applied to the panel member in advance simultaneously with the heat treatment for adding heat. Sound insulation partition wall for partitioning. 3. An asphalt-based material which is formed on a back surface of each of a pair of panel members, each of which is made of a thin metal plate and has a fitting portion at a right angle to the rectangular flat plate, so as to cover almost the entire area of the flat plate portion. A sheet-shaped damping material made of a synthetic material is placed on the panel member, and the coating material applied beforehand to the panel member is heat-welded at the same time as the additional heat treatment for baking. A sound deadening door constructed by fitting the fitting parts of each other so that the close contact sides face each other. 4. A method for bringing a damping material into close contact with the back surface of a panel member constituting a door or a partition wall in a partition wall for partitioning a storage room or an indoor space, and applying a baking paint to the surface in advance. A sheet-shaped damping material made of an asphalt-based synthetic material is placed on the back surface of the panel member, and the panel member is heated during the baking treatment of the coating material, and the vibration damping material is heated simultaneously with this baking treatment. Softens and melts the asphalt component near the panel of the damping material, and the molten asphalt component acts as an adhesive, and the damping material cools and solidifies in close contact with the back surface of the panel member by its own gravity A method for heating and welding the damping material to the panel member.