JPH0517075U - Wooden door - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To prevent warping and twisting of wooden doors due to dimensional changes accompanying shrinkage and expansion of wood. [Structure] A substrate having a small length dimensional change rate due to contraction and expansion and a small anisotropy is used as a core material 10, and a laminated plate formed by adhering a surface material 11 to both surfaces of the core material is used as a mirror plate. A wooden door is made by fitting it into a frame that is assembled with a frame or crosspiece.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wooden door, and more particularly, to a wooden door in which a mirror plate is fitted into a frame body assembled by a frame member, a cross member, or the like.

[0002]

[Prior Art]

 In a conventional wooden door in which a mirror plate is fitted in the fitting groove of a frame assembled with a frame or crosspiece, etc., if the end plate is tightly fitted in the fitting groove to prevent rattling, There has been a problem that the door itself warps and twists due to the expansion and contraction action of the wood board due to the moisture absorption and drying.

Japanese Utility Model Publication No. 59-4158 and Japanese Utility Model Publication No. 64-7181 propose means for solving this problem. In the former, the end plate is loosely fitted in the fitting groove, and the dowel insertion slot is provided at the connection portion thereof in the predetermined direction.The dowel insertion slot does not move in the radial direction but slides in the length direction. The movable dowel is configured by non-bonding and positioning. The latter is a non-porous, low-stretch, high-strength foreign material inserted into the fitting end of a wooden panel that can be used as a mirror plate.

[0004]

[Problems to be solved by the device]

 However, the former does not suppress expansion and contraction of the end plate itself, so the expansion and contraction of the end plate is large, and there is a possibility that a gap may be formed between the end plate and the end plate itself, or the end plate itself may be cracked. Further, according to the latter, since a foreign material such as a fiber-reinforced plastic plate, a thermoplastic resin plate, or a metal plate that does not cause a dimensional change due to moisture or water is inserted, the expansion and contraction action of the wood panel can be suppressed. However, since the free movement of the wood panel in the part where the foreign material is inserted is completely enclosed, the expansion and contraction of the part where the foreign material is not inserted causes warping of the wood panel, especially twisting, and eventually the wood panel as a mirror plate. It was a cause of the warp of the door itself constructed by using it.

[0005]

[Means for Solving the Problems]

 Therefore, the present invention was devised with the utmost effort to solve the above-mentioned drawbacks of the prior art. In the door, as the mirror plate, a laminated plate is used, in which a substrate having a small rate of change in length dimension due to contraction and expansion and a small anisotropy is used as a core material and surface materials are attached to both surfaces of the core material. Is to

As the core material of the end plate, plywood, wood fiber board, wood shaving board and the like are suitable, and in addition, inorganic boards such as calcium silicate board, cement board and gypsum board can be used.

[0007] In general, wood shrinks or expands below the fiber saturation point by an amount according to the change in its water content with drying or moisture absorption. The amount of change due to this contraction or expansion has significant anisotropy due to the complicated tissue structure of wood, and the ratio of the amount of change in the tangential direction (grain direction): radial direction (grain direction): fiber direction is It is said to be about 20: 10: 1.

For example, in the case of plywood, which is one that is preferably used as the core material of the end plate, when the sum of the thicknesses of the front veneer, the veneer in the same fiber direction, and the veneer in the orthogonal direction is the same, both shrinks. The expansion rate (rate of dimensional change in length) is as small as 1/10 to 1/20 of the fiber orthogonal direction (tangential direction), and the anisotropy is small and almost equal. Specifically, the shrinkage rate (expansion rate) per water content of 1% is 0.02 to 0.03% for lauan plywood.

Further, the wood fiberboard is obtained by thermocompression molding of wood fibers with an adhesive, and the wood fibers themselves have a uniform directionality in the length direction and a small shrinkage / expansion rate. Anisotropy is small and almost equal. Specifically, the shrinkage rate (expansion rate) per 1% water content is about 0.04%.

A surface material is attached to both surfaces of such a core material via an adhesive to form a laminated plate, which is used as a mirror plate. The adhesive may be a commonly used synthetic resin type, and the surface material is attached by any method such as cold pressure bonding, heat pressure bonding, and room temperature bonding.

As the surface material, a plate-like body having a small dimensional change rate due to shrinkage and expansion and a small anisotropy can be used similarly to the core material. Makeup such as application, application of a decorative sheet, and optional coloring is applied. Laminates obtained by pasting such surface materials on both front and back surfaces of the core material have a small dimensional change rate even though the length dimension changes, and the surface material and the core material are Because they are tied together, they do not warp or twist.

The surface material has a length dimensional change rate due to contraction and expansion different from that of the core material (a length dimensional change rate larger than that of the core material), and has a large anisotropic plate-like body, or It is also possible to use the surface of the plate-like body, if necessary, with the same makeup as above. For example, wood, veneer, laminated veneer lumber, laminated wood, etc., having a large rate of change in length dimension in the fiber direction and a rate of change in length dimension in the direction orthogonal to the fiber direction. In the case of wood, it will be 1:10 to 20. Even when such a surface material is used, its movement is restricted by being laminated with the core material, and contraction and expansion are suppressed.

The core material of the end plate undergoes a dimensional change due to contraction and expansion, but since the amount of change is small and the anisotropy is uniform, the movement due to the dimensional change of the surface material attached to this core material is small. It is absorbed while being regulated, and does not appear as deformation such as warpage or twist.

[0014]

【Example】

 In the wooden door 1 according to the illustrated embodiment, the vertical rail 5 and the horizontal rails 6 and 6 are assembled to a rail frame assembly formed of an upper rail 2, a lower rail 3 and a pair of vertical rails 4 and 4. The frame body is configured by the above, and the end plates 7, 7 ... Are fitted into the respective openings of the frame body. More specifically, the upper frame 2, the lower frame 3, the vertical frame 4, the vertical rails 5, and the fitting recessed grooves 8 formed in the peripheral portions of the horizontal rails 6 facing the respective openings into which the end plates 7 are fitted, The end plate 7 is attached by inserting and fitting the peripheral projections of the end plate 7 into. With the end plate 7 attached, a play space 9 (FIG. 3) is left in each fitting concave groove 8 to absorb the dimensional change due to the expansion and contraction of the end plate 7.

Each end plate 7 has a core 10 made of a substrate having a small length dimensional change rate due to expansion and contraction and a small anisotropy, and surface materials 11, 11 are attached to both surfaces of the core 10. .

[0016]

[Effect of the device]

 According to the present invention, the end plate fitted to the frame of the wooden door uses a substrate having a small dimensional change rate in the lengthwise direction due to contraction and expansion and a small anisotropy as the core material, and the both sides of the core material. Since the optional surface material is attached, the dimensional change in the length direction due to the contraction and expansion of the surface material is regulated, and the warp and twist of the end plate are effectively prevented.

[Brief description of drawings]

FIG. 1 is a front view showing a wooden door according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along the line AA in FIG.

[Explanation of symbols]

 1 Wood Door 7 End Plate 8 Fitting Groove 10 Core Material 11 Surface Material

Claims (1)

[Scope of utility model registration request] 1. A wooden door in which a mirror plate is fitted into a frame body assembled with a frame member, a cross member, etc., wherein the mirror plate is a substrate having a small length dimensional change rate due to contraction and expansion and a small anisotropy. A wooden door, characterized in that a laminated board formed by sticking surface materials to both surfaces of the core material is used as the core material.