JP2008126547A - Woody structural material which can utilize low density lumber, connection structure using this, structure using this connection structure, and forming method of this connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a woody structural material capable of using low density lumber which can sufficiently be used even if it has a structure receiving a load while exhibiting the quality of the low density lumber, a connection structure using this, a structure using this connection structure and a method of forming this connection structure. <P>SOLUTION: The woody structural material 1 capable of using this low density lumber comprises preparing a core material 11 with the low density lumber, and laminating to adhere a surface shell material 12 applied with a material having strength larger than the core material 11 to at least two faces where the core material 11 faces. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention uses a low-density wood having a certain limit in terms of strength, and a wooden structure material that can utilize low-density wood whose use has been expanded so as to exhibit sufficient strength, and the same. The present invention relates to a connection structure, a structure using the connection structure, and a method of forming the connection structure.

For example, low-density wood such as paulownia is generally used for wooden furniture and the like, which is representative of firewood, because it has many advantages in spite of its negative performance of low strength. One of the advantages is that it is lightweight, easy to handle as furniture, etc., feels warm, including the feel of the bark, and has a low density. Since it is porous and has hygroscopicity and water retention, once fire extinguishing water is applied to it in the event of a fire, it will be extremely difficult to burn, and it will exhibit its power in protecting the contained items. In addition, this type of low density timber has the advantage of growing less as a tree and resulting in less impact on the natural environment due to the shorter time to product dimensions.
However, such low-density wood is not sufficient in strength as described above, and cannot be used particularly in connection parts where strength is required locally. For example, the connection method of wood materials is generally a connection structure with a dowel or the like, or a connection structure using a hozo assembly, etc., but the material itself is of low density and does not have sufficient mechanical strength. In some cases, such an approach cannot be taken.
Of course, in theory, it is possible to realize a structure with low-density materials by making specifications that can exert strength in dimensions, but in reality it becomes a so-called ugly product that can not withstand appreciation, and in the market It is difficult to get a rating of

  The present invention has been made in consideration of such a background, and is a wooden structure that can utilize low-density wood that can sufficiently withstand even a structure that is loaded while expressing the goodness of low-density wood to the last. The present invention proposes a material, a connection structure using the same, a structure using the connection structure, and a method of forming the connection structure.

  The wood structure material capable of utilizing the low-density wood according to claim 1 has a low-density wood as a core material, and at least two opposing surfaces of the core material are laminated and fixed with a shell material that is stronger than the core material. It is characterized by being made to be.

  In addition to the requirements of claim 1, the wood structure material that can utilize the low-density wood according to claim 2 is a solid or plywood wood material applied to the core material and the shell material. Is a feature.

  In addition to the requirements described in claim 1, the wood structure material that can utilize the low-density wood according to claim 3 applies the same or different tree species for the core material and the surface shell material. It is characterized in that the densified one is applied by the next processing.

  In addition to the requirement of claim 1, the wood structure material that can utilize the low-density wood according to claim 4 is characterized in that a non-woody material is applied to the outer shell material.

  In addition to the requirements of claim 1, 2, 3 or 4, the wood structure material capable of utilizing the low-density wood according to claim 5 is the thickness dimension of the core material with respect to the thickness dimension of the outer shell material. 30% or less.

  The connection structure using the wooden structure material capable of utilizing the low-density wood according to claim 6 is a structure of a connection portion in which the two or more elements of the wooden structure material according to claim 1, 2, 3, 4, 5 are combined. The structure of the connecting portion is characterized in that the structural material elements are interleaved with each other, and the surface shell materials in the structural material elements are fixed while maintaining surface contact.

  In addition to the requirement of claim 6, the connection structure using the wood structure material that can utilize the low-density wood according to claim 7 is the one of the structural material elements of the wood structure material to be combined. It is a thick material with a larger thickness dimension, the other structural material element is a thin material with a smaller thickness dimension, and a thick material has a thickness dimension of its core material as the thickness dimension of the thin dimension material. It is characterized in that a thin material is inserted and fixed in a connection receiving portion formed by matching and removing the thick material core material at the connection portion.

  In addition to the requirement of claim 7, the connection structure using the wooden structure material that can utilize the low-density wood according to claim 8 is thicker when joining the thin material to the thick material. The receiving part for connecting the sizing material is formed so as not to penetrate to the side end face.

  The method for forming a connection structure using a wooden structure material capable of utilizing low-density wood according to claim 9 is such that when connecting a thin material to the thick material, the thick material is a shell plate on at least one surface. In this state, the core material is secured with a connection receiving part for fitting a small-sized material, and after inserting the small-sized material into this receiving part, The outer shell material is connected by being laminated and bonded onto the core material.

  The structure using the connection structure of the wooden structure material capable of utilizing the low-density wood according to claim 10 is characterized in that the product to which the structure can be applied is furniture including a chair, a desk, a shelf, and a fitting. Is.

  According to the first, second, and third aspects of the invention, the core material that exhibits sufficient strength in terms of the strength of the shell material and that uses low-density wood is lightweight overall, and in addition, as a woody material A wooden structure material that can feel the softness and warmth of the wood can be obtained. As the surface shell material, high-grade materials and valuable materials can be applied, and as a result, a high-quality wood structure material can be obtained.

  According to the invention of claim 4, synthetic resin plates such as aluminum plate, FRP plate, acrylic plate, etc. whose surface shell material is non-woody material can be applied, and further enrichment in terms of design and functionality. It can be planned.

  According to the invention of claim 5, the thickness of the outer shell material is sufficiently thinner than the thickness of the core material, and the core material is the main component to the last, and the goodness can be exhibited. it can.

  According to the sixth aspect of the present invention, since the structural material elements connected to each other are joined to each other in a sufficiently wide surface in the surface shell materials, sufficient strength can be exhibited at the connection portion.

  According to the invention of claim 7, the structural elements are prepared in at least two sizes of thick material and thin material, and these are combined to obtain a connection structure, which is more rational. A connection mode is obtained.

  According to the eighth aspect of the present invention, in the connecting portion, the so-called small-sized material is combined in a state where the end face is not exposed, so that an aesthetically pleasing finish can be obtained.

  According to the ninth aspect of the invention, it is possible to obtain a sufficient and reasonably strong finish in obtaining the connection structure.

  According to the invention described in claim 10, it can be applied to various furniture and the like, and a new design and structure can be created for them.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention includes an embodiment described below, and includes various improved embodiments based on this technical idea.

Hereinafter, the present invention will be specifically described based on illustrated embodiments.
The wood structure material 1 according to the present invention, the connection structure 2 using the same, the structure 3 having the connection structure, and the manufacturing method of the connection structure are examples of application objects as shown in FIG. A chair 30 will be described below as an example, and a method for forming the connection structure will be substantially described while following the assembly order of the connection structure 2.

  First, the wooden structure material 1 will be described. In this case, two or more elements are naturally combined when the connection structure 2 is configured, and this is described as the structural material element 10 and is thick when the cross-sectional dimensions are different as will be described later. The material 10A and the thin material 10B will be described separately.

  The wooden structure material 1 includes a core material 11 and a surface shell material 12 as main members. The core material 11 is applied with low-density wood, and for example, paulownia wood, balsa wood, cedar, perpock or the like is used. As a typical embodiment, the core material 11 is a bowl-shaped member having a rectangular cross section, and is attached so that the outer shell material 12 is laminated on two opposing surfaces (the long surface side shown in the figure). It is what you attach. The outer shell 12 is a material having a sufficiently large mechanical strength as compared with the core 11, such as black walnut, black cherry, maple, karin, ebony, rosewood, mahogany, etc. Woody material is used.

For example, in the case of the thick material 10 </ b> A, both dimension settings should be set to a thickness dimension in a range in which the surface shell material 12 does not impair the characteristics of the core material 11 when viewed in the direction of the thickness dimension D. For example, the thickness dimension D ₂ of the outer shell material 12 is preferably 30% or less of the thickness dimension D ₁ of the core material 11.
Here, the thickness direction and the thickness dimension D refer to the dimension in the direction in which the outer shell material 12 is laminated on the core material 11, and when the direction is indicated, the thickness direction is referred to as the thickness direction. In addition, the dimension of the surface on which the surface shell material 12 is affixed is referred to as a width dimension W, and the direction of the surface is referred to as the width direction.
Specifically, for example, assuming a chair 30 as the structure 3, in the thick material 10A, the core 11 has a thickness of 18 mm, and the outer shell 12 has a dimension of 3 mm. In the thin material 10B, the thickness of the core material 11 is 12 mm, and the size of the outer shell material 12 is 3 mm.

Next, a connection structure of the structural material elements 10 and a method for forming the connection structure will be described. As shown in FIGS. 1, 2, 3, and 4, for the structural material element 10, for example, for the large material 10A, the connection receiving portion 21 is secured by removing the core material 11 in the large material 10A. Further, the outer shell material 12 constituting one surface is left unbonded.
On the other hand, the small size material 10 </ b> B is fitted into the connection receiving portion 21. In this state, between the outer side surface of the outer shell material 12 which is the lower surface of the thin material 10B and the inner surface of the outer shell material 12 of the thick material 10A in contact therewith, the connection receiving portion 21 is cut off. Between the inner end surface and the end surface in the thickness direction of the thin material 10B, and between the surface shell material 12 on which the thick material 10A is not integrated and the exposed surface of the core material 11 of the thick material 10A, Furthermore, an adhesive is applied between the inner side surface of the outer shell material 12 in the thick material 10A that is not assembled and the upper surface of the outer shell material 12 in the connection portion of the thin material 10B, that is, in the portions where the materials contact each other. After sufficient application, these are assembled by interposing a jig or the like, and then pressed and pressed to complete the connection structure 2. Of course, in this assembly, as shown in FIG. 5, all constituent materials may be unbonded as a starting state, and these may be thermally bonded and integrated as an example.

  And such a connection structure 2 is applied to the junction part of the pedestal 31 and the seat beam 32 in the chair 30 which is an example of the structure 3, for example, and also the left and right pedestals 31 are further what is called penetration material etc. The frame member of the chair 30 is configured by assembling with a cross beam member 33 called “.” By the way, for the pedestal 31, when the place of use is wet, it is easy to absorb moisture from the lower end of the pedestal 31, so a cover that exhibits a waterproof function is put on or partially impregnated with resin. It is preferable to take measures such as imparting water. The seat surface 34 and the backrest 35 are assembled to such a skeleton member to form the chair 30. With respect to such a connection structure 2, a router is formed so that a curved surface R is formed somewhat in order to achieve a design effect as seen in the chair 30 at a portion where the structural material elements 10 intersect or join together. It is also possible to carry out a cosmetic process by such as (see FIG. 1C).

  In addition, for the chair 30, for example, the pedestal 31 is made of a thick material 10A and the seat beam 32 is made of a thin material 10B because of a design requirement. ) When the leg 31 is viewed from the exposed surface of the core material 11 without forming the connection receiving portion 21 up to the end surface of the core material 11 of the thick material 10A as shown in FIG. The configuration is such that the end face of the thin material 10B cannot be exposed.

In such a configuration, the surface shell materials 12 that play an important role as strength members are connected to each other, and it is possible to secure a sufficient contact area with each other, thereby providing a stable rigid structure.
Note that the chair 30 shown in FIG. 1 as an example of the structure 3 has the seating surface 34 and the backrest 35 as shown in FIGS. 1E and 1F. A low-density wood is applied to improve the feel, and a high-density outer shell material 12 is pasted only on the other surface, and these are shaped to be somewhat curved by press molding. Has been applied.

  Incidentally, as for the connection form of the pedestal 31 and the cross beam member 33, as shown in FIG. 1 (g), the cross beam member 33 is somewhat cut into the side surface and the upper and lower end surfaces of the surface shell member 12. The fitting part 21a is formed, and the one pedestal 31 is formed with an insertion hole 21b having a side hole shape corresponding to the thickness dimension and the width dimension of the fitting part 21a up to the inside of the outer surface side shell plate. It is to be fixed. At this time, the stepped portion 21c at the end of the fitting portion 21a in the cross beam member 33 is in contact with the outer surface of the top shell member 12 of the pedestal 31 so that sufficient strength at this connecting portion is obtained.

In addition, the chair in this embodiment was not damaged or deformed by a test conducted in accordance with the “wood furniture quality standard (consumer service system (m mark system)) leg furniture 3-3 repeated impact test” as follows. I couldn't.
Specifically, it is a test in which a load of 60 kg is applied to the seating surface and the lower end of the rear leg column is kept in contact with the ground, while the front leg column is lifted by 30 mm and dropped. The test was repeated 25 times and 4000 times.

[Other Examples]
The present invention has the above-described embodiment as one basic technical idea, but the following modifications are possible.

[Regarding another embodiment relating to the wooden structure material 1]
First, as a modification of the wood structure material 1 itself, the embodiment described above uses a low-density wood of solid wood as the core material 11, and a high-density wood material of a different tree species is used for the outer shell material 12. Although used, it can be varied as appropriate.
As shown in FIG. 6, the core material 11 does not necessarily need to be made of a solid material, and for these, materials having an appropriate plate thickness can be assembled and used. In this embodiment, the central portion is further formed in a space, and this can be used as a utility space 24 used for electric wiring or the like.

Further, as for the shape of the core material 11, the embodiment described above was rectangular in cross section, but the end surface was formed in a curved ellipse or the like as shown in FIGS. 7 (a) and 7 (b), for example. It can be a thing. Even in such a case, FIG. 7B shows a shape in which the trunk portion on the thickness direction side of the core material 11 is recessed and the surface shell material 12 is attached thereto. In addition, when making the corner part of the wooden structure material 1 into a curved cross section in this way, the surface shell material 12 is fitted into the recessed portion as described above, and as shown in FIG. You may form so that an edge part may be included in a part of curved cross section.
Further, the embodiment shown in FIG. 8 (a) develops the idea of FIG. 7 (b), and forms a plurality of indentation grooves 11a of the core shell material 12 in the core material 11 to form a strip-shaped surface shell material 12. Is pasted. Furthermore, what is shown in FIG. 8B is a form in which the core material 11 is not formed into a continuous bowl shape, but is divided into blocks.

  On the other hand, as for the surface shell material 12, the same kind of wood is used in addition to using a wood material of a different tree type, and this can be compressed and densified by, for example, a secondary treatment to be used as the surface shell material 12. Further, in the case where the same or different low-density woody material is applied, it is possible to further impregnate, for example, a synthetic resin or the like as the secondary treatment and use it after increasing the density.

In addition, the material of the outer shell material 12 is not necessarily limited to a wood material, and a reinforced plastic, a single aluminum material, an acrylic board, or a combination of these and a paperboard material is appropriately used. Can be used.
In the embodiment described above, the outer shell material 12 has the same thickness on both sides. However, as shown in FIG. 9, the thickness may be different. Absent.

Further, for the combination method of the core material 11 and the outer shell material 12, for example, the joint surface is flattened, and as shown in FIG. 10, for example, it is constituted by uneven stripes along the longitudinal direction of the structure 3 It is also possible to employ a joint reinforcing structure 13 to make the connection more reliable.
Of course, in such a case, when the connection structure 2 as described above with reference to FIGS. 1 and 2 is configured, for example, in the case of the thick material 10A, it is formed inside the surface shell material 12. It is necessary to remove the uneven streaks of the joint reinforcing structure 13 and form the connection receiving portion 21 as a flat plate as shown in FIG.

[Other Examples of Connection Structure 2]
Next, various variations in the connection structure 2 will be described.
First, the basic embodiment described above is a combination of the thick material 10A and the thin material 10B. However, for example, structural material elements 10 having the same specifications can be connected to each other. In this connection, as shown in FIG. 11, the _two are joined in a staggered manner so that the centers C ₁ C ₂ of both are shifted.

Further, in the structure shown in FIG. 12, when the two structural material elements 10 are connected to each other, they are not directly connected but can be connected via a joint piece 22 formed separately.
For example, the joint piece 22 is constituted by a combination of the core material 11 and the outer shell material 12 which are T-shaped, L-shaped or cross-shaped as a whole. The dimension of the material 10B is set in advance, and the two structural material elements 10 are connected so that the thick material 10A is fitted therein.
Further, as a method for connecting the side surfaces of the respective structural material elements 10 flatly, as shown in FIG. 13A, for one structural material element 10, the outer shell material 12 is made thick. In addition, it is possible to apply a step processing to reduce the entire width here.

Further, in the embodiment shown in FIG. 13B, the strength is maintained by arranging the connection structures 2 of the structural material elements 10 in parallel when the strength requirement is severe.
Further, in the embodiment shown in FIG. 14, in the connection structure 2, the connection angle can be adjusted without using adhesion or the like. For example, the core material 11 at the upper part of the thick material 10A is removed, The small sized material 10B is fitted in and fixed by a clamp 23 for bolting or the like. This can be applied to a desk lamp 38 described later.

[Other Embodiments Related to Structure 3]
Further, an application example of the product as the structure 3 will be described.
Although the embodiment already described is applied as the chair 30, it can be used for a desk 36 or a stool as shown in FIG.
Further, it can be used for a shelf 37 as shown in FIG. 15B and a desk lamp 38 as shown in FIG. 15C. As already described, when applied to the table lamp 38, for example, the connection structure 2 that can be bent at an angle is adopted as the connection structure 2, or a composite material is used as the core material 11 of the structural material element 10, and The space L can be used as the utility space 24 and the wiring L can be passed through.
Furthermore, the present invention can be applied to a fitting 39 such as a shoji as shown in FIG.

The wooden structure material which can utilize the low-density wood of this invention, the connection structure using this, the structure using this connection structure, Comprising: The perspective view of the chair which is an example of a structure, and those It is an enlarged view of the part. It is a perspective view which shows the wooden structure material which can utilize the low-density wood of this invention, and a connection structure using the same. It is explanatory drawing which shows the different element of the wooden structure material which can utilize the low-density wood of this invention. It is a perspective view which shows the formation method of the connection structure using the wooden structure material which can utilize the low-density wood of this invention. It is a perspective view which shows the other formation method same as the above. It is a perspective view which shows the other Example of the wooden structure material which can utilize the low density wood of this invention. It is sectional drawing which shows other Example same as the above. It is a perspective view which shows other Example same as the above. It is a perspective view which shows other Example same as the above. It is a perspective view which shows other Example same as the above. It is a perspective view which shows the other Example of the connection structure using the wooden structure material which can utilize the low-density wood of this invention. It is a perspective view which shows other Example same as the above. It is a perspective view which shows other Example same as the above. It is a perspective view which shows other Example same as the above. It is a perspective view which shows the various Example of the structure using the connection structure of the wooden structure material which can utilize the low-density wood of this invention, (a) is a desk, (b) is a shelf, (c) is electricity A stand, (d) shows a joinery.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wood structure material 10 Structural material element 10A Thick material 10B Thin material 11 Core material 11a Insertion recessed groove 12 Outer shell material 13 Joint reinforcement structure 2 Connection structure 21 Connection receiving part 21a Insertion part 21b Insertion hole 21c Step part 22 Joint piece 23 Clamp 24 Utility space 3 Structure 30 Chair 31 Pillar 32 Seat beam 33 Horizontal beam material 34 Seat surface 35 Backrest 36 Desk 37 Shelf 38 Stand 39 Fixture C ₁ center C ₂ center D Thickness dimension D ₁ Thickness dimension ( Core material)
D ₂ thickness (surface shell)
W Width L Wiring R Curved surface

Claims (10)

  A woody structure that can utilize low-density wood, characterized in that low-density wood is used as a core material, and at least two opposing surfaces of the core material are laminated and fixed with a shell material that is made of a material that is stronger than the core material. Wood.   2. The wood structure material capable of utilizing low-density wood according to claim 1, wherein the core material and the surface shell material are solid or plywood.   2. The low-density wood according to claim 1, wherein the core material and the surface shell material are the same or different tree species, and the surface shell material is densified by secondary treatment. Wood structure material that can be used.   The wood structure material capable of utilizing low-density wood according to claim 1, wherein a non-woody material is applied to the outer shell material.   5. The wood structure material capable of utilizing low-density wood according to claim 1, wherein a thickness dimension of the outer shell material is 30% or less of a thickness dimension of the core material.   A structure of a connecting portion in which two or more woody structural materials according to claim 1, 2, 3, 4, and 5 are combined, and the structure of the connecting portion is such that each structural material element is interlaced with each other. A connection structure using a wooden structure material that can utilize low-density wood, characterized in that the surface shell materials in the structural material element are fixed while maintaining surface contact.   The wood structure material to be combined is a thick material whose thickness is increased for one structural material element, and a thin material whose thickness is reduced for the other structural material element. In addition, the thickness dimension of the core material in the thick material matches the thickness dimension of the thin material, and each structure is fitted with the thin material fitted into the connection receiving portion formed in the core material of the thick material. The connection structure using the wooden structure material which can utilize the low-density wood according to claim 6, wherein the surface shell materials in the material element are fixed while maintaining surface contact.   8. The low density according to claim 7, wherein, when the thin material is joined and connected to the thick material, the connecting portion for connecting the thick material is formed so as not to penetrate to the side end surface. Connection structure using wood structure material that can utilize wood.   In connecting the thin material to the thick material, the thick material is not joined to the core material on at least one surface shell plate, and in this state, the thin material is inserted into the core material. Utilizing low-density wood, characterized by securing a receiving part, inserting a small size material into this receiving part, and then connecting the non-jointed thick shell material on the core A method of forming a connection structure using a wood structure material that can be made.   The product to which the connection structure using the wooden structure material that can utilize the low-density wood according to claim 6, 7, or 8 is a plurality of types of furniture including a chair, a desk, a shelf, and a fitting. A structure that uses a connection structure of wooden structural materials that can utilize low-density wood.

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