JPH06158832A - Floor board - Google Patents

Abstract

PURPOSE:To provide floor material with natural conformability to bed unevenness and to maintain the strength of the floor material by providing the floor material with high flexibility. CONSTITUTION:In a floor material A comprising a decorative material 2 laminated on the surface of a base 1, a recessed groove 3 leading to the base 1 from the surface of the decorative material 2 is formed in the direction perpendicular to the longer side of the floor material A and a number of notched grooves 4 are provided on the back side of the base 1 in the direction perpendicular to the longer side of the floor material A and with an interval X of three times or less of the thickness (t) of the base 1. On the back side of the base 1 corresponding to the surface recessed groove 3, the intervals Y among the grooves where the notched grooves 4 do not exist are four times or more of the thickness (t) of the base.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floorboard which has improved imbibability and appearance to a floor substrate and is easy to be constructed on the floor and is not easily damaged during construction or transportation.

[0002]

2. Description of the Related Art Conventionally, as in the invention described in Japanese Utility Model Publication No. 3-31781, a groove for pseudo joint is formed on the surface of a floor plate (B).
It has been known to provide (3 ′), and further to form a kerf (4 ′) on the back surface of the substrate (1 ′) in order to improve the conformability to floor unevenness.

In the above-mentioned known technique, the base material (1 ') on the back surface is
A kerf at the position corresponding to the surface groove (3 ') (Fig. 5) and its vicinity
By inserting (4 ') (Fig. 6), the floor board (B) can be bent along the unevenness of the sticking surface of the floor base. And, in that case, there is an effect that the bending of the flooring material (B) is less noticeable.

However, in the above-mentioned conventional example, the position of the kerf (4 ') is provided at the position corresponding to the surface recessed groove (3') or in the vicinity thereof, and the recessed groove (3 ') and the kerf are cut from both front and back surfaces. (4 ') is formed and the thickness of the base material (1') becomes thin, and as a result, the strength of the surface groove (3 ') becomes extremely weak, and it is easy to break from this part during transportation or construction. There was a drawback.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional examples, and the technical problem to be solved is to impart a high flexibility to a floor material so that it is naturally conformable to the unevenness of the base. At the same time as giving the strength, it is also to maintain the strength.

[0006]

The flooring material according to the present invention comprises:
`` In the floor material (A) in which the decorative material (2) is laminated on the surface of the base material (1), from the surface of the decorative material (2) to the base material (1) in the direction orthogonal to the long side of the floor material (A). The reaching groove (3) is formed, and in the direction orthogonal to the long side of the flooring material (A), on the back surface of the base material (1), an interval (X ), A large number of kerfs (4) are provided, and the kerfs are formed on the back surface of the base material (1) corresponding to the front side groove (3).
The groove interval (Y) at the portion without (4) is provided at least four times the substrate thickness (t) ”.

As described above, the concave groove reaching the base material (1) from the surface of the floor board (A) in the direction orthogonal to the long side of the decorative material (2) on the surface side.
(3) is provided, and the portion (Y) without the cut groove (4) on the back surface of the base material (1) corresponding to the front side concave groove (3) is longer than the base material thickness (t) by four times or more. Since the groove (3) and the kerf (4) are not concentrated in one place unlike the conventional example, it is hard to break during transportation or construction. Furthermore, the kerf (4) on the back surface of the substrate (1)
Since a large number are provided at intervals of 3 times or less of the base material thickness (t), it is possible to finely respond to unevenness of the floor base by each kerf (4), and one kerf (4) The amount of bending can be reduced, and even if there is no joint [concave groove (3)] on the surface, the bending is not noticeable.

[0008]

The present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 shows a first embodiment of the present invention, and the decorative material (2) used here is, for example, a veneer, a synthetic resin-injected veneer, a synthetic resin decorative sheet material, etc., and its thickness is 0.2. ~ 2 mm
Is. The depth of the groove (3) formed in the decorative material (2) exceeds the thickness of the decorative material (2) and reaches the base material (1). The shape of the groove (3) is V, U or concave and is usually 0.5 to 3
In this embodiment, the grooves (3) are provided at intervals of 300 to 900 mm by utilizing the joint portion of the veneer plate which is the decorative material (2) in this embodiment.

The base material (1) is plywood, particle board, M
A foamed resin sheet for collision absorption on a simple substance such as DF or a composite, or on the front surface portion, the middle layer portion or the rear surface portion thereof.
(5) or the one with the damping sheet attached is used. The substrate thickness (t) is usually 5 to 15 mm, but is not limited to this. In the case of FIG. 1, the base material (1) is a foamed resin sheet.
(5) is not used, and in the case of FIG. 2, the foamed resin sheet (5) is used in the middle layer.

The interval (X) between the cut grooves (4) for improving the conformability of the back surface of the floor material (A) is 0.5 to 2 mm with a saw or the like and the thickness of the base material (1) ( t) 3 times or less, that is, when the thickness (t) is 5 mm, the groove interval (X) is 15 mm or less, and when it is 15 mm, 45 m
A large number of kerfs (4) (4) ... Are provided at substantially equal intervals at intervals of m or less. The groove depth is preferably 1/2 or more of the substrate thickness (t).

From the viewpoint of strength, the kerf (4) is not provided in the portion where the front side concave groove (3) is present. Therefore, the groove interval (Y) in this portion depends on the thickness of the substrate (1). 4 times or more. That is, when the thickness (t) of the base material (1) is 5 mm, the groove interval (Y) is 20 mm.
As described above, in the case of 15 mm, it is 60 mm or more. In this embodiment, the front-side concave groove (3) is located in the central portion of the uncut groove portion, but it goes without saying that it may be slightly displaced from the central portion.

The groove cutting means usually uses a saw, and the thickness of the saw-tooth portion (usually 1 to 1.5 mm is common) is the groove width. Since the saw is rarely changed according to the base material thickness (t), the kerf (3) generally has the same groove width regardless of the thickness of the base material (1). However, if the kerf width is the same and the inner surfaces of the kerf (3) are bent until they come into contact with each other, the radius of curvature will be small if the kerf (3) has a shallow depth, and sharp bends will be noticeable. on the other hand,
If the kerf (3) is deep, the radius of curvature is large and it bends at an obtuse angle, so the folds are not noticeable. Therefore, it is desirable that the depth of the kerf (3) is 1/2 or more of the thickness (t) of the substrate (1) depending on the thickness (t).

The depth of the joints (3) on the surface is the thickness of the base material (1).
Although it is provided regardless of (t) and soundproofing performance, if the base material (1) becomes thicker, the floor material (A) will become heavier and bend easily, so the groove depth on the base material (1) side is 1 / 2 or less.

If necessary, a cushioning material (5) provided between the base material (1) and the decorative material (2) (not shown), or in the middle layer portion and / or bottom surface portion of the base material (1). Is a single layer or laminate of foamed plastic, non-woven mat, or rubber sheet. Further, the floor material pieces may be arranged in a goose shape or a parquet shape, and laminated from the back surface with a foamed plastic sheet or the like to be integrated into one piece of floor material.

The floor base (6) is a panel base such as RC concrete slab on the top surface, mortar poured on the deck plate, ALC lining on light steel frame, or plywood through wooden or RC structure with joisting. The material is stretched.

Then, a rubber adhesive or an epoxy adhesive is applied on the floor base (6), and the floor material (A) is sequentially attached.

At this time, the base material (1) of the floor material (A) has a back surface kerf (4)
At this point, it bends finely according to the unevenness of the floor base (6) and absorbs the unevenness and is laid, but as in the conventional example, it matches the surface concave groove (3) part or the back surface close to it. If there is no breakage of the floor material (A) during laying due to the absence of the kerfs (4), a large number of materials provided at short intervals of about 3 times the substrate thickness (t) are provided. By the back surface kerf (4) ..., a smooth curved surface can be obtained without being bent angularly at the back surface grooving (4) portion. In other words, the bend in the kerfs (4) cannot be seen due to the oblique light. 3 and 4 are side views showing bending states of the present invention and a comparative example, the present invention shows that the bending is smoother by the amount of the kerfs (4).

Here, an experiment was conducted to obtain the effect of the present invention, and the result is shown below. Substrate used in this experiment
(1) is a 5-ply plywood with a thickness of 9 mm. The surface decorative plate (2) has a thickness of 0.6 mm, the front side concave groove (3) has a groove depth of 1.0 mm, and the rear surface kerf (4) has a groove depth of 5.5 mm and a groove width of 1 .2 mm. The cushioning material (5) laminated on the bottom surface of the base material (1) is foamed polyethylene and has a thickness of 6 mm. << Experimental example 1 >> Floor material (A) is laid on a concrete slab (5) with a maximum of 10 mm in a 1 m span, and a rear surface kerf
An experiment was conducted as to whether the position of (4) could be confirmed from the surface side. The experimental results are shown below, but the position of the back kerf (4) is the surface decorative material.
Those that could be confirmed from the (2) side were marked with “x”, those that could be finally confirmed with oblique light were marked with “△”, and those that could not be confirmed at all were marked with “◯”. However, the uncut groove length (Y) is 5
It was set to 0 mm. << Experimental example 2 >> Next, the result of a strength experiment is shown. Length 90c
As a result of shaking up and down by holding the edge of the floor plate (A) with m, width of 75 mm, and groove interval (X) of 10 mm, from the case where the back surface cutting groove (4) is provided directly below the front side concave (3) groove, The distance between the back kerfs (4) is 30 m
Cracks occurred in a range of m or less, and cracks did not occur in a range of more than m.

FIG. 2 is a side view of the second embodiment of the present invention, which is an example in which cushioning materials (5a) and (5) are laminated on the middle layer portion and the lower surface of the substrate (1). ) Is formed on the back surface side of the base material (1). In this case, the presence of the middle-layer cushioning sheet (5a) further reduces the bending in the kerfs (4) and makes it less noticeable.

[0020]

[Effect] The present invention forms a concave groove extending from the surface of the decorative material to the base material in the direction orthogonal to the long side of the flooring material, as in the above, and on the back surface of the base material in the direction orthogonal to the long side of the flooring material. Since a large number of kerfs are provided at intervals of three times the thickness of the base material or less, each kerf can be used to finely deal with unevenness of the floor base, and the amount of bending by one kerf can be alleviated. Even if there is no joint (concave groove) on the surface, there is an advantage that bending is not noticeable.

Further, in addition to this, since the groove interval of the portion without the kerfs is provided on the back surface of the base material corresponding to the front side concave groove at least four times the thickness of the base material, As in the example, the concave groove and the kerf are not concentrated in one place, and there is an advantage that they are hard to break during transportation or construction.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment of the present invention.

FIG. 2 is a side view of the second embodiment of the present invention.

FIG. 3 is a side view showing how the kerf bends in the present invention.

FIG. 4 is a side view showing a bending state of a comparative example with respect to the present invention.

FIG. 5 is a sectional view of a conventional example.

FIG. 6 is another sectional view of the conventional example.

[Explanation of symbols]

 (1)… Base material (2)… Decorative material (3)… Recessed groove (4)… Groove (A)… Floor material (X)… Narrower groove spacing (Y)… Groove where there is no cut groove interval

Claims (1)

[Claims] 1. In a flooring material having a decorative material laminated on the surface of a base material, a groove extending from the surface of the decorative material to the base material is formed in a direction orthogonal to the long side of the flooring material, and is orthogonal to the long side of the flooring material. A plurality of kerfs are provided on the back surface of the base material in the direction of the groove at intervals of not more than 3 times the thickness of the base material. A floorboard, characterized in that the groove spacing of the non-existing portion is provided at a distance of four times or more the thickness of the base material.