JPH0649824Y2 - Softwood veneer laminated wood frame door - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention relates to a softwood veneer laminated board frame door with extremely little warpage and distortion.

(Prior Art) Wooden doors are generally classified into flush doors and frame doors. Among them, the frame doors are mainly muk doors using sawn wood, and most doors using other base materials. I can't see it. Mukumono doors must be thoroughly dried, and yet the warpage after construction is large,
It often caused problems in use.

Also, there are doors using laminated veneer lumber (hereinafter referred to as LVL) and laminated wood, but they are still in widespread use due to warpage and distortion.

(Problems to be solved by the invention) Recently, the living style of houses has improved, air conditioning equipment such as air conditioning and heating is in place, and the temperature and humidity conditions are extremely different between the interior and the corridor, and the door at the boundary is extremely severe. Exposed to conditions. Therefore, warpage is more likely to occur than before.

Further, when a soundproof function is required, it is necessary to seal the gap between the door and the frame material, and thus if there is warpage or deviation, sealing becomes difficult. Against this background, there is an increasing demand for warpage and deviation. With conventional doors, especially the framed door, it was difficult to find a solution.
The soundproofing function cannot be satisfied with flash doors that have relatively little warpage or distortion.

The present invention is intended to provide an LVL frame door which has extremely little warping and distortion in such a situation and also has a soundproof function.

[Constitution of device]

(Means for Solving the Problems) The present invention firstly, when a softwood log is made into a single plate by a rotary race, only the core material is used, and the fiber directions thereof are aligned substantially parallel and laminated and bonded to each other. It is something to do. The softwood material has a clear core and sapwood, and it is easy to take out only the core. The core material has a smaller shrinkage ratio than the sap material, and is less likely to go wrong later. Conventionally, this is put together to create an LVL, so the deviation becomes large. An orthogonal single plate is used as the outermost layer and the third layer from the outermost layer in order to reduce the deviation by using only the core material. With such a configuration, vertical warpage and horizontal warpage can be stopped at the same time. However, since the knotless material in the core material is relatively small, a hardwood veneerless veneer may be used so that defects do not appear on the surface when a decorative veneer is attached to the outermost layer. This is an unavoidable measure for industrial use in the case of mass production.

(Function) Usually, in the core material and the sapwood of the softwood material, the core material contains a larger amount of hydrophobic substances, and therefore the expansion and contraction rates are smaller than those of the sapwood. Therefore, when the frame door is made with the constitution of the present invention, it is possible to make a base material having extremely small warpage.

In addition, if the outermost layer of the LVL and the third layer from the outermost layer are orthogonal single plates, when attaching a handle or a keyhole device after making the door, if a mounting hole (X) for the metal fitting is opened on the side surface of the door Since the outermost layer is hollowed out except for the third layer, the remaining third layer is a plywood structure and the veneers are orthogonal to each other, and it is possible to punch holes in a very stable state. . (Refer to Fig. 2) With such a structure, it is possible to make a door material that can be used even under severe environmental conditions with less warpage.
It can also be used for soundproof doors that especially hate madness, and can also have the effect of maintaining a stable state even when mounting metal fittings.

(Example) Yonematsu raw wood was made into 3.4m / m veneer by rotary lace, 11 core parts (1) alone were collected, and melamine urea co-condensation resin adhesive was used at 120 ° C under 8kg / cm ² condition. It was hot pressed for 40 minutes. At this time, Lauan veneer (2) having the same thickness was used as the outermost layer as the veneer structure, and the outermost layer and the veneers (2) and (3) of the third layer from the outermost layer were laminated in the orthogonal direction. 3rd from the outermost layer
The Yonematsu veneer was used for the orthogonal veneer (3) of the layer. After thickness control, 0.6m / m oak veneer veneer (4) is hot-pressed on both sides of 3.5m / m LVL base material to make 36m / m thick frame and cut to the specified size. A vertical frame (A) and a horizontal frame (B) were prepared.

As the mirror plate (C), a 9 m / m thick plywood plate with veneered veneer adhered on both sides was prepared, and combined with the horizontal members to prepare a door. Attach the edge material (D) to the four edges of the end plate,
Softwood LVL frame door.

When installing, a hole with a length of 90 m / m and a width of 18 m / m and a depth of 60 m / m was drilled in the side surface of the center of the door to embed the key fittings. Were orthogonal to each other, and we were able to make a very strong hole.

The door of the present invention was attached to the boundary between a room of 80% at 30 ℃ and a room of 5 ℃, and after 3 weeks, the warpage was only 0.2m / m.
Met. The warpage deviation was measured by averaging the heights of warp at the center of the vertical and horizontal diagonals of the 1950 x 730 x 36 m / m door.

The warp of a commercially available flash door under the same conditions is 1.5m
/ m, Mukumono door was 3.5m / m.

In this way, we were able to make a door that was extremely warped.

[Effect of device]

(Effect of the Invention) According to the present invention, since each veneer is composed of only the core material, it contains a large amount of hydrophobic substances, and has a smaller expansion rate and contraction rate than the sap material, and It can also be used for soundproof doors that especially dislike warping and distortion, and has a very beneficial effect such as maintaining a stable state even when mounting metal fittings.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing an embodiment of the present invention, FIG. 2 is a partially cutaway sectional view showing another embodiment of the present invention, and FIG. 3 is a use of the present invention. It is a front view which shows a state. 1 ... Core material part, 2 ... Outermost layer veneer, 3 ... Outermost layer to third layer veneer, 4 ... Decorative veneer, A ... Vertical frame, B ...
Horizontal frame, C ... End plate, D ... Edge material, X ... Mounting hole,

Claims (2)

[Scope of utility model registration request] 1. In a veneer laminated material using softwood, a core material is used for all laminated veneers, and the outermost layer of the veneer laminated material and the third layer from the outermost layer are orthogonal layers. A veneer laminated board frame door that is made by making a veneer laminated board and attaching a decorative veneer to the outermost layer to make a frame. 2. The veneer laminated wood frame door according to claim 1, wherein only the outermost layer of the veneer laminated wood is a hardwood veneer.