JP2000179244A - Door and plywood for door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the structure of a door in which the occurrence of warp or distortion can be prevented by a simple means and a plywood as a door main body material used in the door. SOLUTION: In this door formed by fixing a frame material 1 to at least the peripheral edge part of a door main body material 6, the door main body material 6 is a laminated plate formed by bonding a surface material 6b to both sides of a core material 6a by a pressure sensitive adhesive double coated tape 7, the frame material 1 has a substantially rectangular cross section, an insert groove 2 where the door main body material 6 is inserted is formed in the inside surface 1a of the material 1, the corner part with the surface side 1c of the outside surface 1b is eliminated to form a design surface, and a recessed groove 4 is formed in the back side 1d, or a warp preventing iron plate is mounted at the deepest part in the door main body material insert groove 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door of a building and a plywood used for the door, and more particularly to a door of stable quality with little change over time and a structure of the plywood used for the door. It is.

[0002]

2. Description of the Related Art As shown in FIG. 8, an example of a conventional door structure is a pair of left and right and upper and lower frame members 1 called frame members or frame members which are opposed to each other. 1a
A groove 2 is formed, and a door body 6 is inserted into the groove 2 and fixed with an adhesive, and a corner between the front side surface 1c and the outer side surface 1b of the frame member 1 is deleted to provide a design surface. In general, a structure in which 3 is formed is used.

In such a conventional door, a plywood as shown in FIGS. 9 (a) and 9 (b) is generally used for the door body 6. That is, the door body member 6 has a core member 6a as a strength member sandwiched between a peripheral portion and a central portion of a pair of front and back surface members 6b formed of a decorative plate cut to a predetermined size, and the both are bonded by an adhesive 8 such as glue. It has a structure bonded by. Note that FIG. 9A is a cross-sectional view of the door body material, and FIG. 9B is a conceptual diagram illustrating an arrangement state of the core material 6a on the surface material 6b.

[0004] On the other hand, the frame material 1 may be formed of a piece of wood or a plywood obtained by laminating and bonding thin plates, or a synthetic wood (MDF material) obtained by kneading and solidifying wood powder and a resin together with an adhesive. However, inexpensive MDF materials are often used.

[0005]

In the door having such a structure, first, the door body 6 is formed by fixing a core material 6a and a surface material 6b with an adhesive 8, and the adhesive 8 is made of vinyl acetate or the like. An emulsion of a vinyl resin is generally used, and a method of applying or spraying the emulsion on an adhesive surface and joining the two members under pressure is common, but these emulsions contain a large amount of water. Therefore, in the drying process after the pressing of the core material and the surface material, the door body material is often warped or distorted. In particular, when the material of the front and back surface materials is different (for example, when one surface is a PVC plywood and the other surface is a Lauan material or a printed plywood), warpage or distortion is likely to occur due to a difference in drying speed, and the core material 6a If the thickness of the door body 6 is small, the door body 6 may be warped or distorted without being able to withstand the warping or distortion stress.

Also, when the frame material 1 is not sufficiently dried, or when the moisture absorption between the front and back surfaces of the frame material 1 is different, as shown conceptually in FIG. In some cases, warping occurred, and the door itself was distorted.

In particular, when the frame material is synthetic wood (MDF material) obtained by kneading wood powder and resin together with an adhesive and solidifying it,
Since wood flour itself has a larger specific surface area than one wood, it has been recognized that the warpage gradually progresses due to the difference in moisture absorption between the front and back wood flour. That is, in FIG. 8, the corners on the front side of the frame 1 are often deleted from the viewpoint of design to form the design surface 3. In this case, the surface area on the front side and the surface area on the back side of the frame 1 are reduced. As a result, there was a difference in the degree of moisture absorption between the front and back wood flours, and the warp was more likely to occur than in the case of single wood.

Therefore, there is a demand for a measure for preventing the warpage and distortion of the door by simple means, and the present invention satisfies this demand and prevents the occurrence of warpage and distortion by simple means. It is an object of the present invention to provide a door structure that can be used and a plywood as a door body material used for the door.

[0009]

SUMMARY OF THE INVENTION The present invention has been made based on such a viewpoint, and is roughly classified into two types. First, the first method is to prevent the occurrence of warping and distortion of the door body material by forming the door body material into a plywood structure in which a surface material is bonded to both sides of a core material with a double-sided adhesive tape. The material has a substantially rectangular cross section, an insertion groove into which the door body material is inserted is formed on the inner surface, and a design surface is formed by removing a corner of the outer surface with the surface side. And a concave groove for preventing warpage is formed on the back side thereof.

Next, in the second method, a groove for inserting a door body material is formed on the inner surface of a frame material having a substantially rectangular cross section instead of the frame material of the first method. A corner portion of the outer side surface of the frame member with the surface side is deleted to form a design surface, and an iron plate for preventing warpage is inserted and disposed in a deep portion of the groove for inserting the door body material. In this case, it is more preferable to form the concave groove for preventing warpage on the back surface side of the frame material.

In the second method, the side wall thickness of the iron plate used is preferably 1.0 to 3.0 mm, and 1.2 to 2.0 mm.
0 mm is more preferred.

Further, the position of the concave groove formed on the back side of the frame member is such that the center line in the width direction of the groove is within the range of the width of the design surface of the front corner from the outer surface of the frame member. It is preferable that the groove width center line of the concave groove is present outside the center line of the distance from the outer surface of the frame material to the design surface. It is.

The size of the concave groove is preferably such that the circumferential length of the concave groove in the cross section of the frame material is equal to or larger than the width of the design surface in the horizontal cross section. It is preferable to use a curved surface width along the curved surface of the design surface. However, as a simple method, a method using a linear width of the design surface is also acceptable.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a door according to the present invention will be described below with reference to the drawings. FIG. 1 conceptually shows the structure of the door body material of the present invention. First, as shown in FIG. 1 (a), a double-sided adhesive tape 7 is attached to both sides of a frame material 6a.
This is disposed at a predetermined position of one surface material 6b as shown in FIG. 1 (b), that is, at a peripheral portion and a central portion of the surface material, and is adhered. Then, as shown in FIG. By arranging the other surface material 6b on the upper surface, the core material 6a is sandwiched between a pair of front and back surface materials 6b. Is done.

As the double-sided adhesive tape 7 used here, a known adhesive is used. However, since the adhesive used for the double-sided adhesive tape does not contain water, the adhesive in the form of an emulsion is used as described above. When the agent is used, a drying step which is indispensable is unnecessary, and therefore, the door main body does not warp due to moisture in the drying step. The width of the double-sided adhesive tape 7 is preferably equal to the width of the core material 6a. However, the illustrated example shows an example in which a narrow double-sided adhesive tape is arranged for easy understanding. In some cases, a double-sided adhesive tape wider than the width of the core material 6a may be used. In this case, after bonding the surface material to both sides of the core material,
There is no problem because the portion protruding in the molding process of the door body material is cut off.

FIG. 2 is a cross-sectional view of a main part of a first embodiment of the frame 1 used in the present invention. The inner surface 1a of the frame 1 has a groove for inserting a door body 6 therein. 2 are formed, and the door body 6 formed by sandwiching the core 6a between the pair of surface materials 6b and bonding the both with the double-sided adhesive tape 7 is inserted into the groove 2 and is appropriately inserted. It is fixed with an adhesive.
The point that the corners between the front side surface 1c and the outer side surface 1d of the frame member 1 are deleted to form the design surface 3 is the same as the conventional one shown in FIG. The present embodiment is greatly characterized in that a concave groove 4 having a rectangular cross section is formed on the back surface side for adjusting the hygroscopicity of the back surface side of the frame material.

That is, comparing the surface area of the front side 1c and the surface area of the back side 1d, if there is no concave groove 4, the front side 1c
As described above, the surface area is increased by an amount corresponding to the formation of the design surface 3 in the slope portion. Therefore, by forming the concave groove 4 in the back surface 1d, the surface area of the back surface is increased, so that the difference in hygroscopicity due to the difference in the surface area between the two is eliminated.

Therefore, when the groove width is a and the groove depth is b, the size of the groove 4 is the groove circumferential length (a + 2b).
Is greater than or equal to the width c of the design surface 3 (a + 2b ≧ c), so that the surface area on the back side is larger than the surface area on the front side. Thereby, the surface area on the back side is
The total back surface area including the surface area of the surface 1d 'near the outer surface on the back side is larger than the total surface area on the front side, but since the entire design surface 3 is in direct contact with the external environment, However, the concave groove 4 on the back side surface is less susceptible to the external humidity change by the amount formed toward the inside of the frame material 1. Therefore, the balance is achieved by making the total surface area on the back side slightly larger than the total surface area on the front side.

The position of the groove 4 is such that the groove width center line n is the width d of the design surface 3 from the outer surface 1b of the frame material.
Is preferably set to be present inside of. This is to keep the hygroscopicity of the back side balanced by the concave groove 4 in response to the hygroscopicity of the front side due to the presence of the design surface 3, so it is meaningless if the positions are separated from each other. Therefore, as described above, the position of the concave groove 4 is
Is preferably located on the back side of the range in which is present. In particular,
It is preferable that the groove width center line n of the concave groove 4 exists outside the center line m of the design surface 3 at a distance d from the outer surface 1b of the frame material. This means that the concave groove 4 is formed within the area where the design surface 3 exists, and at the same time, the outer surface 1
This has the meaning of facilitating the inhalation and release of the moisture in the inner part of the frame material as much as possible, not in the vicinity of b. As a result, the moisture absorption on the front side and the back side of the frame material 1 is balanced, so that the occurrence of the warpage of the frame material due to moisture absorption, which has conventionally occurred, is significantly suppressed.

FIG. 3 shows a modification of the embodiment shown in FIG. 2. The difference from FIG. 2 is that the groove width a of the concave groove 4 is reduced and the depth b is increased. The design surface 3 is formed as a curved surface. In particular, from the viewpoint of the design, the shape of the design surface 3 is rarely a simple flat surface as shown in FIG. 2, and a curved surface or a pattern is often engraved. Also in this case, the circumferential length (a + 2b) of the above-described concave groove 4 is not less than the width c of the design surface (a + 2b).
2b ≧ c) is the same. As the width c of the design surface in this case, it is preferable to use the width of the surface along the curved surface, but it is also possible to use a straight line width as a simple method.

Next, FIG. 4 is a sectional view of a main part of a second embodiment of the present invention, in which warpage is prevented without forming the concave grooves shown in FIGS. An iron plate 5 is inserted and disposed in the frame member 1 at the back of the groove 2 for inserting the door body. This method utilizes the bending strength of the iron plate 5 in the width direction. Even if a force that warps due to a difference in moisture absorption between the front and back surfaces of the frame material 1 acts on the frame material 1, the surface of the iron plate 5 is not affected. Since the bending resistance in the back direction is extremely large, the iron plate 5 plays a role of a core material, and the frame material 1 is not easily deformed (warped).

When the thickness t of the iron plate 5 is small, not only the end face of the iron plate acts as a blade but cuts into the core material, thereby causing not only the warpage of the frame material but also the destruction of the frame material itself. Therefore, the thickness t of the iron plate 5 needs to be 1.0 mm or more, and preferably 1.2 mm or more if possible. When the thickness t exceeds 3.0 mm, the frame material 1
The weight of the door body increases, making it inconvenient to handle, and the insertion depth of the door body material to be inserted into the groove 2 is restricted, so that it is 3.0 m.
m or less. Taking these together, it is practically preferable to use an iron plate having a thickness t of 1.2 to 2.0 mm.

When the iron plate 5 is flat, its thickness t is uniform, but as shown in FIG.
It is also possible to use an iron plate 5 having a U-shaped cross section having flanges 5a on both sides of the flat plate 5b. In this case, it is sufficient that the thickness t of the flange portion 5a has the above-mentioned thickness, and the thickness of the central flat plate portion 5b can be as thin as 1.0 mm or less. In this sense, the side wall thickness of the iron plate 5 used in the present invention may be 1.0 to 3.0 mm, preferably 1.2 to 2.0 mm, and the thickness of the central portion is A thickness of 1.0 mm or less is sufficient as long as it is not easily deformed by the pressing force from the side, and a thickness of 0.6 mm is sufficient in practical use.

FIG. 6 is a sectional view showing a third embodiment of the frame material according to the present invention. The features of the first embodiment shown in FIG. 2 and the second embodiment shown in FIG. This is an example that has both. That is, the above-described iron plate 5 is inserted and arranged in the groove 2, and the concave groove 4 is formed in the back surface 1 d of the frame material 1. The positional relationship between the groove 4 and the design surface 3 and the relationship between the circumferential length of the groove and the width c of the design surface are the same as those in FIG. In the case of this example, the effect of the concave groove 4 formed on the back surface side of the frame member 1 and the effect of the iron plate 5 inserted into the groove 2 for inserting another member are provided.
The effect of preventing the warp of the frame material 1 becomes more remarkable. still,
In this example, the shape of the design surface 3 is different from that shown in FIGS.

Next, FIG. 7 shows a modification of the embodiment of FIG. 6, in which a groove having a V-shaped cross section is formed as the concave groove 4 formed on the back surface side of the frame 1. An example is shown. Also in this case, the relationship between the circumferential length of the groove 4 and the width of the design surface 3 is the same as in the case of the above-described “U-shaped” groove. It is set so as to satisfy the relationship of not less than the width c (2e ≧ c).

It should be noted that, in the case of FIGS.
7 may be a concave groove having a V-shaped cross section, as in FIG. 7, and may have a further shape, for example, a U-shaped or W-shaped cross section. Needless to say.

The door is assembled by arranging the above-described frame member 1 according to the present invention vertically and horizontally, and inserting the door body member 6 into the insertion groove 2 of the frame member 1, but the present invention is applied. Typical doors are not only doors for building entrances and exits, but also doors such as closets, bookcases, cupboards, and cabinets, but the use of the doors is not limited at all. .

[0028]

As described above in detail, according to the structure of the door according to the present invention, the door body is made of a core material and a surface material adhered by a double-sided adhesive tape containing substantially no moisture. As a result, the warping and distortion of the door body material due to the moisture contained in the adhesive as in the related art is eliminated, and not only the subsequent assembling process is facilitated but also the quality of the product is further improved.

Further, since a drying step which is indispensable when a conventional emulsion of a vinyl resin is used as an adhesive becomes unnecessary, the manufacturing process of the door body material can be greatly simplified, and the manufacturing cost can be reduced. Reduction is also possible.

Further, by forming a concave groove at a predetermined position on the back side surface of the frame member having a substantially rectangular cross section having a design surface at the front side corner of the frame material, the moisture absorption of the front and back surfaces is adjusted. Warpage due to moisture absorption can be easily prevented, so there is almost no deformation over time in the process of using a door assembled using the frame material, and problems such as troubles and complaints after delivery are greatly reduced. can do.

Also, instead of the concave groove of the frame member, an iron plate is inserted and arranged in a deep portion of the door body member insertion groove formed on the inner surface of the frame member, so that the width in the width direction of the iron plate can be increased. Since the occurrence of warpage of the frame material is prevented by the bending resistance, similarly, it becomes easy to obtain a door of stable quality over time.

Further, by inserting and arranging an iron plate as a frame material in the inner part of the concave groove, the occurrence of warpage of the frame material is further suppressed, so that the quality of the door using the frame material is extremely high. It becomes possible to make it stable.

Further, in the present invention, the occurrence of warpage or distortion is suppressed by the structure of the door body material and the frame material constituting the door. Changes in characteristics with respect to the warpage of the door are reduced, which can further contribute to stabilization of door quality.

[Brief description of the drawings]

1A and 1B are conceptual views showing the structure of a door body according to the present invention, wherein FIG. FIG. 2C is a perspective view of a main part showing a state where the door main body is arranged, and FIG.

FIG. 2 is a sectional view of a main part showing a first embodiment of a frame material used in the present invention.

FIG. 3 is a sectional view of a main part showing a modification of the first embodiment of FIG. 2;

FIG. 4 is a sectional view of a main part showing a second embodiment of the frame material used in the present invention.

FIG. 5 is a sectional view of a main part showing a modification of the iron plate shown in FIG. 4;

FIG. 6 is a sectional view of an essential part showing a third embodiment of a frame material used in the present invention.

FIG. 7 is a sectional view of a main part showing a modification of FIG. 6;

FIG. 8 is a sectional view of a main part showing a structure of a conventional door.

FIG. 9 is a conceptual diagram showing the structure of a conventional door body material,
(A) is a sectional view of a main part, and (b) is a perspective view of a main part.

FIG. 10 is a schematic view showing a warped state of a conventional door.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 frame material 1a inner surface of frame material 1b outer surface of frame material 1c front surface of frame material 1d back surface of frame material 2 groove for inserting door body material 3 design surface 4 concave groove for preventing warpage 5 iron plate 6 door body material 6a Core material 6b Surface member 7 Double-sided adhesive tape a Width of concave groove b Depth of concave groove c Width of design surface d Width of design surface from outer surface of frame material

Claims (14)

[Claims] 1. A door comprising a frame material (1) fixed to at least a peripheral portion of a door body material (6), wherein the door body material (6) has surface materials on both sides of a core material (6a). (6b) a double-sided adhesive tape bonded with a double-sided adhesive tape (7), wherein the frame material (1) has a substantially rectangular cross section, and the inner surface (1a) has the door body material (6) An insertion groove (2) into which is inserted is formed, and the front surface side (1) of the outer surface (1b) is formed.
a door having a design surface (3) formed by removing a corner portion with c) and a concave groove (4) formed on the back surface side (1d). 2. A door having a frame member (1) fixed to at least a peripheral portion of a door body member (6), wherein the door body member (6) has surface materials on both sides of a core member (6a). (6b) a double-sided adhesive tape bonded with a double-sided adhesive tape (7), wherein the frame material (1) has a substantially rectangular cross section, and the inner surface (1a) has the door body material (6) An insertion groove (2) into which is inserted is formed, and the front surface side (1) of the outer surface (1b) is formed.
c) is removed to form a design surface (3), and a depth of the insertion groove (2) into which the door body material (6) of the frame material (1) is inserted. Door, characterized in that an iron plate (5) is inserted and arranged in the part 3. The iron plate (5) has a side wall thickness of 1.0 to 1.0.
3. The door according to claim 2, which is 3.0 mm. 4. The iron plate (5) has a side wall thickness of 1.2 to 1.2.
The door according to claim 3, which is 2.0 mm. 5. The door according to claim 2, wherein a concave groove (4) is formed in a back surface side (1d) of the frame material (1). 6. The groove width center line (n) of the concave groove (4) is:
The door according to claim 1 or 5, wherein the design surface (3) is present within a range (d) from an outer surface (1b) of the frame material. 7. The groove width center line (n) of the concave groove (4) is:
The door according to claim 6, wherein the design surface (3) is located outside a center line (m) at a distance (d) from the outside surface (1b) of the frame material. 8. A circumferential length (a + 2b, 2e) of the concave groove (4) in a cross section of the frame material (1) is equal to or more than a width (c) of the design surface (3) in the cross section. 2e ≧
The door according to any of claims 1 or 5 to 7, which is c). 9. The door according to claim 8, wherein the width (c) of the design surface (3) is a length along a curved surface of the design surface. 10. The door according to claim 8, wherein the width (c) of the design surface (3) is a linear width of the design surface. 11. The frame material (1) is made of synthetic wood formed by kneading wood and resin, or a plywood containing the synthetic wood. The door described in 12. The door according to claim 1, wherein the frame member (1) is formed of a plywood formed by stacking a plurality of plate members. 13. The door body material (6) is such that a core material (6a) is arranged on at least a peripheral portion of a rectangular flat surface material (6b), and the core material (6a) and the flat surface material (6b) are arranged. 13. The door according to any one of claims 1 to 12, wherein the door is bonded with a double-sided adhesive tape (7). 14. Surface materials (6b) on both sides of a core material (6a).
A door plywood (6) obtained by bonding and polymerizing, wherein the core material (6a) and the surface material (6b) are bonded by a double-sided adhesive tape (7). Plywood for door