JPH0533294Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a veneer unit that does not warp or crack even when it absorbs moisture or dries.

[Conventional technology and its problems]

Previously, it was developed as a veneer unit in 1988-97013.
There is something disclosed in the publication No. This panel unit has a structure in which a top plate, an intermediate material, and a back plate are bonded together with an adhesive, and the joints of the top plates are chamfered and a portion thereof protrudes. If the top plate is made of natural wood, natural wood has a strong hygroscopic property, so there is a problem that the top plate expands and contracts depending on the climate of the day, creating a gap at the joint of the back plate. Furthermore, when a natural wood top board is attached to a thin back board by full adhesive fixing, due to the expansion and contraction of the natural wood top board, the force of the top board is strong, so the surface may warp.
I had a problem with cracks forming.

In addition, Japanese Utility Model Publication No. 61-43006 discloses a veneer unit in which a ventilation space is cut out on the back side of the natural wood front panel in order to prevent the natural wood front panel from becoming distorted due to drying. However, this case still had the same problem.

The present invention aims to overcome the above-mentioned drawbacks.

[Means to solve the problem]

The present invention was made to achieve the above object, and includes a groove for preventing warping in the center of the back surface, a locking protrusion on one end of the periphery, and a locking piece that fits with the locking protrusion on the other end. A wide top plate made of a natural wood plank with a groove formed therein, and a locking plate that is narrower than this top plate and has a locking protrusion on one end of the periphery and a locking protrusion on the other end. A veneer unit formed by fitting a plurality of narrow front plates made of natural wood planks with grooves into the locking protruding pieces and the locking grooves and adhesively fixing them to the back plate by gluing. In the above, the gluing between the back surface of the wide front plate and the back plate is performed only on the back surface of the wide front plate on the side of the locking groove.

[Effect]

The panel unit of the present invention is used as an interior material by attaching a back panel to the surface of a ceiling, wall, door, door, etc.; In a panel unit that is adhesively fixed to the back plate by gluing, the adhesive between the back side of the wide front plate and the back plate is only on the back side of the wide front plate on the side of the locking groove, so that the wide front plate does not absorb moisture.・Even if the board expands and contracts in the direction of the annual rings due to drying, this expansion and contraction can be absorbed by the sliding of the unbonded parts of the wide top board.
In addition, each top plate is fitted with a locking protrusion and a locking groove, and the back side of the wide front plate on the side of the locking groove and the back side of the narrow front plate are glued to the back plate. Since it is fixed, the fitting part will not separate, and the veneer unit can be prevented from warping or cracking, resulting in a durable and beautifully designed veneer unit.

In addition, the groove to prevent warping formed approximately in the center of the back of the wide top plate maintains the average moisture content of the entire top plate and helps alleviate deformation. When gluing the back surface and the back plate, it is possible to accurately glue only the back surface on the locking groove side of the wide front plate.

〔Example〕

The panel unit of the present invention will be explained below based on the illustrated embodiment.

In the figure, reference numeral 1 denotes a wide top plate, which is made of a desired width of a desired natural wood plank, and has protruding pieces 11 and 12 for locking on one end in the longitudinal direction and one end in the transverse direction of its periphery. Protrudes integrally with the main body of the top plate.

The locking protrusions 11 and 12 are provided at the lower edge of the top plate 1, that is, on the bottom side. Furthermore, locking grooves 13 and 14 into which the locking protrusions of other adjacent top plates fit are cut and formed on the other remaining peripheral edges of the top plate. A shallow groove 15 for preventing warpage is formed in the longitudinal direction of this top plate 1 and approximately at the center of its back surface (bottom surface). As a result, the back surface of the front plate is separated into a back surface 16 on the side of the locking groove with the groove 15 in between, and a back surface 17 on one side of the locking protrusion. When bonding this wide front plate 1 to the back plate 3, glue is applied to the back surface 16 on the side of the locking groove to adhere it to the back plate 3, and the back surface 17 on the side of the locking protrusion is not glued. It is assumed that it is simply in contact with the back plate 3, and when the top plate 1 expands and contracts due to moisture absorption and drying of the top plate 1, this back side 17, which is not glued, slides freely against the back plate 3, causing the top plate to warp. etc., to prevent such occurrences.

2 is a narrow top plate, made of the same material as top plate 1,
Locking protruding pieces 21, 22 and locking grooves 23, 24
are formed in the same shape in that they are provided on the periphery, but this front plate 2 has a narrower width than the front plate 1, and the back side 2
6 is a flat surface, and the entire back surface 26 is glued to adhere to the back plate 3. Since this top plate 2 is formed narrower than the top plate 1, problems such as warping of the top plate 2 do not occur even if glue is applied to the entire back surface 26 of the top plate 2.

In addition, in order to make both the top plates 1 and 2 beautiful in terms of design, grooves 18 and 28 are carved on their surfaces, and by combining a plurality of the top plates 1 and 2 with each other, the locking protrusions 11 and 12, 21, 22 and locking grooves 13, 1
When 4, 23, and 24 are fitted together and adhesively fixed to the back plate 3 by gluing, a brick-like pattern is formed together with the grooves 18, 28 and the chamfers 19, 19 on the end faces of each top plate. This groove 18, 28
can also be omitted.

When forming the panel unit, first use the top plates 1 and 2 as shown in the lower half of FIG. Glue it to the back plate 3. Next, this top plate 2
The locking protrusion 11 on the top plate 1 side is fitted into the locking groove 23 of the top plate 1, so that the top plates 1 and 2 are made to be one piece parallel to each other. At this time, the locking groove side back surface 16 of the top plate 1
and glue to the back surface 26 of the front board 2 and adhere to the back board 3. This state is shown in the lower half of FIG. The locking protrusion 11 (on the non-glued side) of the top plate 1 is fitted into the locking groove 23 of the top plate glued in this way, and the top plate 1 locks the top plate 2 from above. Since it is held down by the grooves, even if the top plate 1 tries to expand and contract in the direction of the annual rings of the board due to moisture absorption and drying, it can freely expand and contract in the width direction, and warping of the top plate 1 is prevented. become.

Also, the left end sides of the front plates 1 and 2 are arranged so as to protrude slightly to the left from the periphery of the back plate 3, and conversely, the right end sides of the front plates 1 and 2 are set slightly inside the periphery of the back plate 3. Make sure you are there. Next, another set of top plates 1 and 2 are assembled together, as shown in the top half of FIG. 1, in the same manner as the bottom half top plates described above.

As shown in the upper half of Figure 1, the top plate 1 is glued to the back plate 3 with the locking groove 14 side slightly inward from the periphery of the back plate 3 by gluing it to the back surface 16 of the locking groove side. At this time, the protruding piece 11 of the wide top plate 1 is fitted into the groove 23 of the narrow top plate 2 and pressed into place. The upper half top plates 1 and 2 are shifted in position by half a pitch from the lower half top plates 1 and 2, so that the left ends of the upper half top plates 1 and 2 protrude farther than the edge of the back plate, and conversely, the right ends are deeper inward than the edge of the back plate, exposing the surface of the back plate 3 at this portion.

In this way, the grooves 18, 28, the chamfer 19,
29 becomes staggered, creating a beautiful design.

In addition, in the embodiment shown in the figure, a groove for preventing warpage may be carved in the rear surface 26 of the narrow front plate 2 in the substantially central part thereof in the same way as the wide front plate 1.

Furthermore, it is also possible to arrange the short edges of each of the top plates 1 and 2 in a straight line.

[Effect of idea]

The veneer unit of the present invention is a veneer unit in which a locking protrusion and a locking groove are fitted and fixed to a back plate by gluing.
Gluing between the back side of the wide front board and the back board was done only on the back side of the wide front board on the locking groove side, so even if the wide front board expands and contracts in the direction of the annual rings of the board due to moisture absorption and drying, this expansion and contraction will be prevented. can be absorbed by the sliding of the unbonded part of the wide top plate, and each top plate is fitted with the locking protrusion piece and the locking groove, and the locking groove side of the wide top plate is fitted together. The back side and the back side of the narrow front board are glued and fixed to the back board, so the mating parts do not separate, preventing warping and cracking of the veneer unit, and a beautiful design with durability. It can provide interior materials for

[Brief explanation of the drawing]

Fig. 1 is a plan view, Fig. 2 is a sectional view taken along the - line, Fig. 3 is a sectional view taken along the - line, Fig. 4 is an external view, and Fig. 5 is a schematic diagram showing the state of adhesion between the top plate and the back plate. It is. 1 and 2 are the front plate, 3 is the back plate, 11, 12, 21,
22 is a protruding piece for locking, 13, 14, 23, 24 is a locking groove, 15 is a groove for preventing warpage, 16, 17,
26 is the back side.

Claims (1)

[Scope of utility model registration request] A wide front plate made of a natural wood plank with a groove to prevent warping approximately in the center of the back surface, a protruding piece for locking at one end of the periphery, and a locking groove that fits with the protruding piece for locking at the other end. and a narrow top plate made of a natural wood plank that is narrower than this top plate and has a locking protrusion at one end of its periphery and a locking groove in which the locking protrusion fits into the other end. In the board unit in which a plurality of each of the above-mentioned locking projecting pieces and the locking groove are fitted together and adhesively fixed to the back plate by gluing, the gluing of the wide front plate back and the back plate is performed. . A veneer unit characterized in that the wide top plate has only the back surface on the side of the locking groove.