JP5051789B2 - Wooden door - Google Patents

Description

  The present invention relates to, for example, a wooden door using a core material having a three-layer cross tension structure in which three paulownia plates are stacked and used as a door of a house or the like.

  Conventionally, wooden doors have been used as doors for houses and the like, and there are various structures. For example, in the case where a high-class feeling or heavy feeling is required, such as a door used for a house entrance, etc., one piece of natural wood is used as a material for the wooden door. Thus, although the wooden door manufactured with one piece of natural wood can obtain a high-quality image, there is a problem that the cost becomes high.

  For this reason, recently, a wooden door that has been developed to satisfy a demand for a sense of quality has been developed by using a laminate of a plurality of wooden boards as a core material and bonding a decorative board to the surface of the core material (for example, Patent Document 1). A wooden door composed of such a core material and a decorative board can achieve a significant cost reduction as compared with one made of a single piece of natural wood.

  However, a wooden door using a core material composed of a plurality of wooden plates has a problem that the core material warps due to long-term use, and as a result, the entire door warps. This warping of the door is considered to be a phenomenon that occurs when moisture inside the core material moves from a warm direction to a cold direction, and thereby the cold side wood expands. For example, when a large temperature difference occurs between a heated room and an outdoor room in winter, the wooden door employed as the entrance door may be warped.

  In order to prevent warping of wooden doors, there are some that are provided with a reinforcing material so as to surround the core material, but even with a structure provided with such a reinforcing material, the warping of the door should be sufficiently prevented. The fact is that it is not possible. In recent years, there has been a demand for further cost reduction for wooden doors. However, if reinforcing materials are used, the number of parts constituting the wooden door increases and the number of manufacturing steps increases, resulting in an increase in cost. It is the actual situation that has fallen.

  In order to solve such a problem, the present inventor has created a wooden door using a core material having a three-layer cross-stretch structure in which three paulownia plates are laminated in a specific direction. According to this wooden door, it is possible to effectively suppress the warpage of the core material and to effectively suppress the warpage of the entire door, while reducing the cost, while eliminating the need for reinforcing materials such as frames and braids. (See Patent Document 2).

JP 2004-232449 A Japanese Patent No. 3863549

  Of course, even with such a structure of the wooden door described in Patent Document 2, it is possible to effectively suppress the warpage generated in the entire door, but the wooden door is required to further reduce the warpage.

  This invention is made | formed in view of such a situation, and it aims at providing the wooden door which can suppress more reliably the curvature which arises in the whole door.

The first aspect of the present invention that solves the above problems is the first and second paulownia plates having a grain direction that is a transverse grain direction, and second and third grain directions that are joined to both surfaces of the first paulownia board and the grain direction is a longitudinal direction. A core material composed of a third paulownia plate, and a decorative plate affixed to the surfaces of the second and third paulownia plates constituting the core material, the second and second The surface of the third paulownia plate is provided with a plurality of grooves extending in the direction intersecting the grain direction of the second and third paulownia plates , and each groove is formed on the end face of the second and third paulownia plates. It is in a wooden door characterized by opening .

  According to a second aspect of the present invention, there is provided the wooden door according to the first aspect, wherein the groove is extended in a direction orthogonal to the grain direction of the second and third paulownia plates.

  According to a third aspect of the present invention, the grooves formed in the second paulownia plate and the grooves formed in the third paulownia plate are arranged so as not to overlap in the longitudinal direction of the core material. It is in the wooden door of the 1st or 2nd aspect characterized by being characterized.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the same number of the groove portions are formed at regular intervals on the surfaces of the second and third paulownia plates. On the wooden door.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the groove is provided on a surface of the second and third paulownia plates to which the decorative plate is attached. In one embodiment of a wooden door.

  ADVANTAGE OF THE INVENTION According to this invention, even in the environment where the temperature difference of the one surface side and the other surface side of a core material is large, it can suppress effectively that a core material warps, and improves the shape stability of a door. There is an effect that can be.

It is a schematic perspective view of the wooden door which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view of the wooden door which concerns on one Embodiment of this invention. It is a schematic perspective view which shows the example of a change of the wooden door which concerns on one Embodiment of this invention. It is a schematic perspective view which shows the example of a change of the wooden door which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view which shows the example of a change of the wooden door which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view which shows the example of a change of the wooden door which concerns on one Embodiment of this invention.

Hereinafter, the present invention will be described based on embodiments.
FIG. 1 is a schematic perspective view of a wooden door according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of a wooden door according to an embodiment of the present invention.

  As shown in FIG.1 and FIG.2, the wooden door 10 of this embodiment is used for the entrance of a house, a door in a house, etc., for example, and the three 1st-3rd paulownia boards 21-23 are included. The core material 20 is laminated, and the decorative plate 30 is attached to both surfaces of the core material 20.

  The core member 20 is composed of a first paulownia plate 21 disposed in the center, and second and third paulownia plates 22 and 23 respectively joined to both surfaces of the first paulownia plate 21. For the first to third paulownia plates 21 to 23, paulownia plates having grain in a predetermined direction are used. For the first paulownia plate 21 disposed in the center in the thickness direction of the core material 20, a paulownia plate whose grain direction (fiber direction) substantially coincides with the lateral direction (short direction) of the wooden door 10 is used. It has been. The second and third paulownia slabs 22 and 23 substantially coincide with the direction in which the grain direction is substantially perpendicular to the grain direction of the first paulownia board 21, that is, the longitudinal direction (longitudinal direction) of the wooden door 10. A paulownia board is used.

  As described above, the core member 20 has a so-called three-layer cross tension structure in which three first to third paulownia plates 21 to 23 having a grain of a predetermined direction are laminated. Thereby, it can suppress effectively that the core material 20 generate | occur | produces curvature. That is, the warpage of the second and third paulownia plates 22 and 23 of the core member 20 is regulated by the first paulownia plate 21. As a result, warpage occurring in the entire wooden door 10 can be effectively reduced.

  Thus, the 1st paulownia board 21 which comprises the core material 20 has played the role which supports the 2nd and 3rd paulownia boards 22 and 23. FIG. For this reason, the thickness of the first paulownia plate 21 constituting the core member 20 is preferably 1.5 times or more the thickness of the second and third paulownia plates 22 and 23, and further 2.0 times. The above is preferable. Thereby, since the 2nd and 3rd paulownia boards 22 and 23 are favorably supported by the 1st paulownia board 21, it can suppress more effectively that the core material 20 warps.

  Each of the first to third paulownia plates 21 to 23 constituting the core member 20 may be a single plate, or a plurality of short-sized plate members joined together.

  The decorative board 30 is directly affixed on the surface of the 2nd and 3rd paulownia boards 22 and 23 which comprise the core material 20, respectively, for example using an adhesive agent, a screw, a Tucker needle | hook, etc. As long as the decorative board 30 is formed of natural wood, the decorative board 30 may be formed of a single sheet, or may be formed of a laminated material or a laminated material.

  And the surface of the 2nd and 3rd paulownia boards 22 and 23 which comprise the core material 20 of such a wooden door 10 cross | intersects the grain direction of these 2nd and 3rd paulownia boards 22 and 23 A plurality of grooves 24A and 24B having a predetermined depth extending in the direction are provided. In this embodiment, each groove part 24A, 24B is provided in the surface where the decorative board 30 of the 2nd and 3rd paulownia boards 22 and 23 was affixed, and these 2nd and 3rd paulownia boards 22 and 23 of these are provided. It extends in a direction (horizontal direction) orthogonal to the grain direction. Although the number of these groove parts 24A and 24B is not specifically limited, It is preferable that the groove part 24A and the groove part 24B are the same number. In the present embodiment, three grooves 24A and 24B are formed in the second and third paulownia plates 22 and 23, respectively.

  Here, the groove 24 </ b> A provided in the second paulownia plate 22 and the groove 24 </ b> B provided in the third paulownia plate 23 are preferably formed so as not to overlap in the longitudinal direction of the core material 20. That is, as shown in FIG. 2, the grooves 24 </ b> A and 24 </ b> B are preferably arranged in a so-called staggered pattern in the longitudinal section of the core member 20. Further, the interval between the groove portions 24A and 24B is not particularly limited, but is preferably constant in the longitudinal direction of the core member 20.

  For example, in the present embodiment, the second paulownia plate 22 is provided with three groove portions 24A at an interval of 600 mm, starting from a position of 200 mm from the upper end. On the other hand, the third paulownia plate 23 is provided with three groove portions 24B at intervals of 600 mm, starting from 200 mm from the lower end. That is, each groove 24A is formed in the second paulownia plate 22 such that the distance between the upper and lower ends and each groove 24A is 1: 3: 3: 3 from the upper end side of the second paulownia plate 22. In the third paulownia plate 23, each groove 24B is formed so as to be 1: 3: 3: 3 from the lower end side.

  The size (width, depth) of the groove portions 24A and 24B is not particularly limited, but the depth of the groove portions 24A and 24B is such that the decorative plate 30 does not penetrate the second and third paulownia plates 22 and 23. It is preferable that it is deeper than the thickness. For example, in the present embodiment, the decorative plate 30 has a thickness of about 2.5 mm, whereas each of the groove portions 24A and 24B has a width of 3.0 to 4.0 mm and a depth of 3.0 to 4.0 mm. It is formed to the extent.

  And since the predetermined number of grooves 24A and 24B having a predetermined size are provided on the surfaces of the second and third paulownia plates 22 and 23 in this way, the warpage of the core material 20 is more reliably suppressed. As a result, it is possible to effectively suppress warping occurring in the entire door. For example, even in an environment where the temperature difference between the one surface side and the other surface side of the wooden door 10 is large, warpage occurring in the entire door can be effectively suppressed, and the shape stability of the door can be enhanced.

  If the groove portions 24A and 24B are formed through the second and third paulownia plates 22 and 23, the effect of suppressing such warpage of the core member 20 cannot be obtained. Further, the grooves 24A and 24B are formed in the first and second paulownia plates 21 because they are formed in the second and third paulownia plates 22 and 23 so that the warpage of the core material 20 can be suppressed. However, a sufficient effect cannot be obtained. If such a groove portion is provided in the first paulownia plate 21, conversely, the rigidity of the core member 20 may be reduced, and the amount of warpage may be increased.

  In addition, in this embodiment, the groove portions 24A and 24B are formed without opening on the end surfaces of the second and third paulownia plates 22 and 23. As shown in FIG. 3, the second and third paulownia plates are formed. An opening may be provided on the end faces of the plates 22 and 23. In this case, the following effects can be obtained. It is known that “paulownia” which is a material of the core material 20 emits far infrared rays and negative ions and has a deodorizing effect. Then, as described above, the grooves 24A and 24B are provided in the second and third paulownia plates 22 and 23 so as to open at the end surfaces of the second and third paulownia plates 22 and 23, so that the far infrared rays are provided. Release and deodorizing effect are promoted. That is, since the air contacts the second and third paulownia plates 22 and 23 in the groove portions 24A and 24B, the air flows in the second and third paulownia plates 22 and 23 as compared with the case where the groove portions 24A and 24B are not provided. Since the area in contact with the water greatly increases, the emission of far infrared rays and negative ions and the deodorizing effect are promoted.

  Moreover, since it can suppress that the whole door warps in this way, the reinforcing material for the warp prevention of the core material 20 is not required for the wooden door 10 of this invention. That is, even if a reinforcing material is not provided so as to surround the core material 20, it is possible to effectively suppress warping of the entire door. Therefore, compared with the conventional wooden door, manufacturing cost can be reduced significantly.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this Embodiment, If it is a range which does not deviate from the main point of invention, it is not limited to the above-mentioned embodiment.

  For example, each of the groove portions 24A and 24B is preferably extended along the short direction of the core member 20 as described above, but is not limited to this, for example, as shown in FIG. The core material 20 may be extended along the longitudinal direction.

  In the above-described embodiment, the groove portions 24A and 24B are exemplified as having a rectangular cross section, but the shape of the groove portions 24A and 24B is not particularly limited. For example, as shown in FIGS. 5A and 5B, the cross-sectional shape of the groove portions 24A and 24B may be a substantially semicircular shape, a triangular shape, or the like.

  In the above-described embodiment, the groove portions 24A and 24B are provided on the surface of the second and third paulownia plates 22 and 23 on which the decorative plate 30 is attached, but the groove portions 24A and 24B are illustrated in FIG. As shown, the second and third paulownia plates 22, 23 may be provided on the first paulownia plate 21 side surface.

  Furthermore, although the wooden door 10 of the present invention is suitably used as a front door of a house as described above, of course, the application location is not particularly limited, and can be used as, for example, an indoor door.

DESCRIPTION OF SYMBOLS 10 Wooden door 20 Core material 21 1st paulownia board 22 2nd paulownia board 23 3rd paulownia board 24A, 24B Groove part 30 decorative board

Claims (5)

A core composed of a first paulownia board whose grain direction is the transverse direction and second and third paulownia boards which are joined to both surfaces of the first paulownia board and the grain direction is the longitudinal direction; A decorative board affixed to the surfaces of the second and third paulownia plates constituting the core material,
The surfaces of the second and third paulownia plates are provided with a plurality of groove portions extending in a direction intersecting the grain direction of the second and third paulownia plates , and each groove portion is the second and third groove plates . A wooden door that is open on the end face of the paulownia board .   2. The wooden door according to claim 1, wherein the groove is extended in a direction perpendicular to the grain direction of the second and third paulownia plates.   Each groove part formed in the said 2nd paulownia board and each groove part formed in the said 3rd paulownia board are distribute | arranged so that it may not overlap in the longitudinal direction of the said core material. The wooden door according to 1 or 2.   The wooden door according to any one of claims 1 to 3, wherein the same number of the groove portions are formed at regular intervals on the surfaces of the second and third paulownia plates.   5. The wooden door according to claim 1, wherein the groove portions are respectively provided on surfaces of the second and third paulownia plates to which the decorative plates are attached.

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