JP2005137714A - Top plate for furniture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a top plate for a steel furniture in which all components from an outer skin to an internal component are formed of a steel material, and the occurrence of steel sound is suppresssed without adopting the structure of loading a paper honeycomb core material thereon or the structure of charging and foaming a plastic material after arranging an internal reinforcing member, and which can be made lighter in weight and higher in strength than a publicly known conventional top plate even when being formed thinner in thickness than the conventional top plate. <P>SOLUTION: In the top plate where the skin 1 is formed of the steel plate with a hollow inside, the core material 3 in the form of a honeycomb core made of the steel plate having an aperture diameter larger than the thickness (t) of the top plate which the skin 1 forms is fitted to the inside of the hollow. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a furniture top plate suitable as a top plate to which a particularly large vertical load is applied, such as a desk, a counter, and a table.

  Conventionally, the top plate of steel furniture that has an inner shell made of steel is hollow in the interior to provide strength against vertical loads and prevent steel noise. Methods such as arranging a material, arranging a paper honeycomb core material, or injecting a foam into the inside to take a foam are adopted.

  On the other hand, the disposal of steel furniture, such as used desks, is now being used for the purpose of environmental conservation, and the components of the steel furniture are sorted according to the material at the time of disposal, and those that can be reused are recycled. Measures have been taken.

  In the sorting for the purpose of recycling as described above, the larger the steel furniture such as a desk or a counter, the more time is required for the sorting work, which is a big problem in the disposal of unnecessary steel furniture. In particular, when the hollow top plate skin is formed of a steel plate and the core material or foam of a material different from the steel material is filled therein, the above problem is remarkable.

In view of the above problems and the like, there has been proposed a top plate in which all the constituent members of the furniture top plate are formed of a single material (see Patent Documents 1 and 2). However, the proposed top plate is made of all-aluminum material or all-plastic material, so the cost is high, the large top plate is not suitable due to insufficient strength, or When trying to increase the strength, new problems such as increased weight and lack of practicality have arisen.
JP 2003-174935 A Japanese Patent No. 3443758

  In view of the above-mentioned problems, the present invention forms a steel furniture top plate from the outer skin to the internal components, all of which is made of a steel material, and after placing an internal reinforcing member, a paper honeycomb core material Even if it does not adopt a structure for loading and foaming and filling a synthetic resin material, it is possible not only to suppress the generation of steel noise, but also to form a significantly smaller thickness than the conventional known top plate. It is an object of the present invention to provide a top plate that can be formed with lighter weight and higher strength than the top plate.

  The structure of the top plate of the present invention, which has been made for the purpose of solving the above-mentioned problems, is a top plate in which the outer skin is formed by hollowing the inside with a steel plate, and the thickness of the top plate formed by the outer skin in the hollow interior. A honeycomb core made of steel plate having an opening diameter larger than that is attached.

  In the top plate of the present invention, a core material in which a thin and narrow steel strip or steel tape material (hereinafter also simply referred to as “strip”) is formed in a honeycomb core shape is formed on the top and bottom surfaces of the top plate. When covering with the formed steel outer shell, the inner surface of the outer shell and the core material were bonded with an adhesive to fix the core material inside the outer skin.

  In the top plate of the present invention, at least at the four corners in the top plate skin, portions to which the legs supporting the top plate are attached are formed by the members other than the top plate skin and the core material, and are formed on the leg attachment portion. The top plate of the present invention having a leg attachment portion is useful as a top plate for a desk or table or a counter. The top plate of the present invention provided with no leg mounting portion is useful as a top plate for a cabinet or a box-like counter.

  The honeycomb core material used for the top plate of the present invention is formed by aligning a plurality of steel strips in the length direction, the width of which is substantially the same as the inner dimension of the top plate thickness, and the length of which is appropriately aligned. And by laminating the strips one by one with the adhesion points alternately shifted, and by stretching the joined strips in the stacking direction at the non-bonded portion, It is formed in a core material having continuous cell portions that form a turtle shell pattern.

  The top plate of the present invention is formed by fixing a core material having a continuous cell portion having a honeycomb shape or the like formed of a thin steel strip material between an upper surface material and a lower surface material made of steel, which is a top plate skin, with an adhesive. Since the component member forms an all-steel top plate, the top plate can be subjected to a recycling process as it is without being disassembled for separation.

  In addition, the steel honeycomb core material used in the top plate of the present invention has a large diameter of the cell portion with an opening diameter of at least twice the outer dimension thickness of the top plate, preferably about 4 to 20 times. Therefore, this contributes greatly to reducing the weight of the entire top plate, and can also form a thin top plate that significantly suppresses the thickness (outer dimensions) of the top plate. Even if it is (for example, the long side is 2400 mm or more), sufficient strength is exhibited and the thickness of the outer dimension is small, so that a structural member that looks smart in appearance can provide a large top plate made of all steel.

  Next, an example of the embodiment of the top plate of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the main part when the top plate of the present invention is viewed from the back side, and FIG. It is process drawing typically shown in order to demonstrate the manufacture form of the core material formed with a strip | belt material or a tape material.

  In FIG. 1, reference numeral 1 denotes a top plate of a top plate skin formed by a steel plate having a thickness of about 0.6 to 0.8 mm as an example, with both sides on the long side formed in a substantially U-shaped cross section. In FIG. It is placed with the side facing up. Reference numeral 2 denotes an end member made of a steel material disposed so as to close the openings at both ends in the length direction on the back surface of the upper surface plate 1.

  The top plate of the present invention is manufactured as follows as an example. That is, first, the left and right end portions closed by the left and right end members 2 and 2 and the cross section formed in the length direction (long side) of the top plate are horizontally oriented substantially U-shaped edge portions 1a and 1b. Inside the enclosed upper surface plate 1, a steel strip or tape material having a width corresponding to the inner dimension of the top plate thickness formed by the U-shaped edge portions 1a, 1b of the upper surface plate 1 (hereinafter simply referred to as a band material). The upper surface plate 1 is formed by adhering the honeycomb-shaped core material 3 formed in the above manner to an adhesive (not shown in FIG. 1) applied to the inner surface of the upper surface plate 1.

  In the formation of the upper surface plate 1 having the end member 2 and the core material 3, the leg mounting brackets 4 serving as mounting seats for the top plate legs are disposed at the four corners before the core material 3 is disposed. Therefore, on the back surface of the upper surface plate 1, the core material 3 is disposed avoiding the portion where the leg mounting bracket 4 is disposed. In the top plate of the present invention, the leg mounting bracket 4 is not an essential configuration. For example, when the top plate of the present invention is placed and coupled to a furniture frame (not shown) such as a counter or a table, a placement coupling portion for that purpose may be provided inside or on the outer skin. It is.

  Next, a bottom plate (not shown in FIG. 1, equivalent to the top plate 1 as an example) that is shaped to cover the entire area where the core material 3 and the leg mounting bracket 4 are exposed on the back surface of the top plate 1. Or a slightly thin steel plate) is applied to the back surface thereof so as to cover the core material 3 and the metal fitting 4 of the upper surface plate 1, and the lower surface plate is adhered to the core material 3. The overlapping portions of the edge portions 1a and 1b of the upper surface plate 1 and the lower surface plate are joined to form an element body of the steel top plate of the present invention in which the steel honeycomb core material 3 is attached.

  The top plate of the present invention is formed on a top plate such as a desk or the like by subjecting at least the outer surface of the top plate 1 of the top plate skin to a finishing treatment such as painting or coating. Surface treatment such as painting of the top plate 1, the end member 2, and the bottom plate may be performed before assembling the top plate body.

The manufacture of the core material 3 taking the honeycomb shape used for the top plate of the present invention as an example will be described with reference to FIG.
As shown in FIG. 2 (i), the core material 3 used for the top plate of the present invention forms a band material or tape material 31 cut from a thin steel plate into a narrow width. For example, the strip 31 or the tape 31 is a thin steel plate having a thickness of about 0.1 to 0.2 mm. If the inner thickness t of the top plate skin shown in FIG. 1 is 15 to 20 mm, the same 15 mm to 20 mm. Although it is cut to such a narrow width, in the present invention, the width of the strip material or tape material 31 is not limited to this value. This is because the width is formed in accordance with the inner thickness t of the top plate skin. Moreover, since the length of the strip material or tape material 31 can be defined from the relationship between the diameter φ of each cell of the core material 3 and the length of the top plate using the core material 3, the strip material or tape material. Adjust 31 to the required length. This molding is performed by a cutting machine (cutter) or a slitter.

  When the above-described forming process of the band material or tape material 31 is completed, each band material or tape material 31 is sent to the next process, and the adhesive 32 is applied at regular intervals. The application position of the adhesive 32 is determined by the planar shape of the cell of the core material 3 and its size. For example, if the shape of the cell is a hexagon, the adhesive 32 is applied in a unit of length that is the sum of the lengths of the three sides of the trapezoid that forms 1/2 of one cell (see FIG. 2 (ii)). . The application position is applied by alternately shifting the phase of each band material or tape material 31 one by one. The reason for alternately shifting the phase of the application position is that the honeycomb-shaped core material 3 is formed so that all hexagonal cells are shifted from each other and arranged without gaps (see FIGS. 1 and 2). (See (iv)). In the present invention, the shape of each cell is not limited to the hexagon in the above example, but may be any other planar shape.

  As shown in FIG. 2 (iii), the plurality of strips or tapes 31 with the adhesive 32 applied by shifting the application position for each sheet as shown in FIG. Laminate in a state where the portions are aligned, and put on a surface plate or the like in this state and apply pressure P from above, or apply clamping pressure from the top and bottom of the laminate, and each strip or tape material 31 They are joined together with adhesive 32 at each point. The number of laminated strips or tape members 31 is determined by the diameter of each cell in the core material 3 and the front-rear width (depth) of the top plate on which the core material 3 is used.

  The strip or tape material 31 pressed in the laminated state as described above and laminated and bonded at a predetermined pitch by the action of each of the applied adhesives 32 is not shown in the figure, but both the front and rear ends in the laminated state are not shown. The upper part and the lower part of the belt or tape material 31 located between the restraining parts are applied with a holding jig that can move upward and downward. Each cell can be inserted into all non-adhesive parts of each strip or tape material 31 in the state, and a pair of forming rods (teeth) with the bottom two are inserted, and each set of forming rods is opened up and down to each cell. Is formed into a core material 3 for the top plate of the present invention having a generally hexagonal shape. In this case, the set of two forming rods (teeth) to be used is a tapered rod having a substantially hexagonal cross section. 2 (iii) and (iv), 32a to 32e indicate the positions of the applied adhesives, and the adhesives 32a positioned on the straight strip or tape material 31 in the laminated state. When 32e is formed into a honeycomb-shaped core, it is for explaining where the core is located.

  Since the core material 3 used for the top plate of the present invention can be manufactured by the above-described process mode as an example, the manufacturing apparatus can also have a simple structure.

  The present invention is as described above, and the top plate for the steel furniture is formed by hollowing the inside with the steel plate to form the outer skin. From the thickness of the top plate formed by the outer skin in the hollow interior. Since the core material of the honeycomb core made of steel plate with a large opening diameter is attached and formed, the top plate can be formed with all the components made of all steel, so it is separated at the time of disposal after used Can be processed in its original form without disassembly.

  In addition, the core material used for the top plate is formed of a plurality of steel strips having a width substantially the same as the inner dimension of the top plate thickness and appropriately aligned in the length direction. By laminating together and joining the strips one by one with the bonding points alternately shifted, the laminated strips thus joined are stretch-molded in the laminating direction at the non-bonded portion, thereby forming a honeycomb or turtle shell. Since it is formed on a core material with a continuous cell part that forms a pattern, etc., the upper and lower hulls have a high joint line density in the entire area of the top plate despite the small weight ratio of the inside of the top plate. Thus, even when formed on a light and thin top plate, a top plate superior in weight and strength to the conventional product can be provided.

The perspective view of the principal part of this invention top plate. FIG. 2 is a process diagram schematically showing the manufacture of a core material formed of a steel strip or tape material used for the top plate of the present invention.

Explanation of symbols

1 Steel top plate 2 Steel end member 3 Steel core material
31 Steel strip or tape
32 Adhesive 4 Steel leg mounting bracket

Claims (4)

  In the top plate in which the inside is formed by hollowing the inside with a steel plate, a honeycomb core-shaped core material made of a steel plate having an opening diameter larger than the thickness of the top plate formed by the outside skin is attached to the inside of the hollow. A furniture top board characterized by that.   The furniture top plate according to claim 1, wherein the inner surface of the outer skin and the core material are bonded to each other by an adhesive and the core material is fixed inside the outer skin.   The top plate for furniture according to claim 1 or 2, wherein at least four corners inside the outer shell are formed with members other than the top plate outer shell and the core material so that the legs supporting the upper plate are attached to the leg mounting portions. . The core material is formed so that the width is almost the same as the inner dimension of the top plate thickness, and a plurality of steel strips with appropriate lengths are laminated in the length direction, and each band is laminated. Each piece of material is joined by alternately shifting the bonding points, and the laminated strip thus joined is stretch-molded in the lamination direction at the non-adhesive part, thereby forming a continuous shape such as a honeycomb or turtle shell pattern. The furniture top plate according to any one of claims 1 to 3, wherein the furniture top plate is formed on a core material having a cell portion.

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