RU2112127C1 - Door leaf of massive wood - Google Patents

Abstract

FIELD: building constructions, applicable in construction engineering and furniture industry. SUBSTANCE: door leaf consists of fillets joined in a board, and has the second board of similar interconnected fillets, and the third board placed between the first and second ones and consisting of joined fillets; the latters are positioned perpendicularly to the fillets of the first and second boards. The boards and fillets forming them are glued to one another. The planes of gluing of the first board are shifted relative to the planes of gluing of the second board. EFFECT: enhanced strength and reduced warping of fillets making up the door leaf. 2 cl, 2 dwg

Description

 The invention relates to building materials and structures and may find application in housing and furniture industry.

 Known door leafs made of longitudinal and transverse bars forming a frame inside which there are panels (application Germany N 38006361, CL E 06 B 3/072).

 It is known that the drying of the timber to a greater extent occurs across the width across the wood fibers, therefore, due to the fact that in the described construction the bars, and therefore the wood fibers are located in mutually perpendicular directions, their drying is uneven, and between transverse and longitudinal gaps are formed by the bars.

 Single-layer door leafs are known, consisting of a number of battens glued together, the doors being reinforced thanks to metal bars that are inserted into the battens across the leaf (French application N 2635815, class B 06 B 3/74; German application N 4207487, class K 06 B 5/10). However, this embodiment of the door leaf is extremely low-tech.

 The closest in technical essence to the proposed one is a solid wood door construction, the door leaf of which is made of a large number of boards glued into a block, interconnected by means of tongue-and-groove joints, to give strength the neighboring boards are pairwise fastened together by short rails located in several rows according to the height of the canvas (Application of Germany N 3709644, CL E 06 B 3/70).

 The disadvantage of the proposed design is the possibility of warping of the door leaf in both longitudinal and transverse directions.

 The objective of the invention is the creation of a door leaf structure with high strength and anti-warping.

 The problem is solved in that the door leaf, consisting of bars connected to the shield, according to the invention is equipped with a second shield of the same mentioned connected bars and a third shield placed between the first and second boards and consisting of interconnected bars located perpendicular to the bars of the first and second shields, and the bars in the shields are glued together.

 The gluing planes of the bars of the first shield can be offset relative to the gluing planes of the bars of the second shield.

 The execution of the door leaf, the shields of which are drawn from parallel bars, leads to the fact that the wood fibers in the shield are located in one direction. This allows for differences in temperature and humidity to work the bars evenly, without a holding moment, in contrast to door leafs, the frame of which consists of longitudinal and transverse bars. In the latter, the drying out of the bars occurs in mutually perpendicular directions, which leads to the formation of cracks at the joints.

 The supply of the door leaf with a third shield, placed between the first and second panels and consisting of bars perpendicular to the bars of the first and second panels, leads to a significant reduction in the deformation of the fibers of the bars, which is caused by uneven longitudinal shrinkage of the wood, which causes the bending of the bars, and sometimes twisting ( propeller effect).

 The offset of the gluing planes of the bars of the first shield relative to the gluing planes of the bars of the second shield also helps to reduce the deformation of the bars and increases the strength of the door leaf.

 The appropriateness of gluing bars and boards together is explained by a high degree of tensile strength.

 The width of the bars (4-5 cm) is selected from considerations of the magnitude of longitudinal shrinkage, and as a result, the amount of twisting, as well as the manufacturability of the manufacture of bars.

 In FIG. 1 shows a door leaf, general view; in FIG. 2 is a cross section of a door leaf (fragment).

 The door leaf consists of panels 1, 2, 3 glued to each other, formed, in turn, by 4.5 beams glued together. The bars 5 of the shield 3 are perpendicular to the bars of the shields 1 and 2.

 In the manufacture of each of the shields 1, 2, 3 for pressing in glued wooden blocks 4,5, the latter are placed in a clamp, after drying, the shields are trimmed to the desired thickness (2 cm). Bonding of the shields 1,2,3 is made by moisture-resistant adhesive under the press, while the shields 1, 2 can be installed with a shift of the planes 6 for gluing the bars 4. After the shields 1,2,3 are glued into a single sheet, it is cut to size.

 If necessary, a drawing is applied on one or both sides of the door leaf on a milling and copying machine for final finishing; the leaf is coated with a paint and varnish material.

 As tests have shown, the proposed door leaf is highly resistant to warping, cracking, strength, resistance to weathering and manufacturability.

Claims (2)

 1. The door leaf of solid wood, consisting of bars connected to a shield, characterized in that it is equipped with a second shield of the same mentioned connected bars and a third shield, placed between the first and second boards and consisting of interconnected bars located perpendicular to the bars of the first and second panels, and the bars in the boards and boards are glued together.  2. The canvas according to claim 1, characterized in that the gluing planes of the bars of the first shield are offset from the gluing planes of the bars of the second shield.

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