JP2015143432A - Floor material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin floor material capable of improving strength of a solid constitution part at the surface layer side while improving the conformability with a floor base.SOLUTION: The floor material 1 is a laminated material which has a front side projection part 12 and a rear side projection part 13 which are formed in a shiplap manner on both side ends. On the rear surface side of a surface layer part 10 which includes a ligneous base material 11, a sheet-like resilient rear layer part 20 is formed. The front side projection part constitutes a female tongue section 2 on one side end 24; and the rear side projection part constitutes a male tongue section 3 on the other side end 25. On the front side and the rear side of the surface layer part, a resin sheet 14, 15 is applied over the entire surface including the front surface of the front side projection part and the rear face of the rear side projection part.

Description

  The present invention relates to a flooring material containing a woody base material.

Conventionally, floor materials in which a flexible sheet or the like is laminated on the back surface side of a woody base material such as plywood from the viewpoint of improving the familiarity with the floor base is known. The side part of such a flooring is provided with a real part for joining adjacent flooring. For example, it is conceivable that a male solid part and a female real part of the actual structure are respectively provided on both side ends of a woody base material such as plywood, and a flexible sheet is laminated on the back side thereof. . However, in this case, the thickness of the base material tends to increase in order to provide male and female fruits, and the flexible sheet has an appropriate thickness in order to improve the familiarity with the floor base. There was a tendency for the flooring itself to become thicker.
For example, in Patent Document 1 below, a male and female fruit is formed on two opposite sides of the floor material itself on the back side of the upper layer made of a wood material or the like provided with a pair of fruit on two opposite sides. Thus, a flooring having a structure in which an intermediate layer and a lower layer made of a flexible material are laminated has been proposed.

Japanese Utility Model Publication No. 5-30335

  According to the flooring described in Patent Document 1 above, the male and female fruits can be constituted by the intermediate layer, the lower layer, and the upper layer, so that the upper layer can be thinned, but the upper layer This part tends to become thinner, and further improvement is desired.

  The present invention has been made in view of the above circumstances, and provides a flooring that can improve the familiarity with the floor base while reducing the thickness and can improve the strength of the actual constituent part on the surface layer side. It is aimed.

  In order to achieve the above object, the flooring according to the present invention is provided on the back side of the surface layer portion including the woody base material in which the front side protruding piece portion and the back side protruding piece portion are provided in a laminar manner on both side ends. A sheet-like back layer portion having flexibility, one side end portion forms a female real portion with the front side protruding piece portion, and the other side end portion side of the back side protruding piece portion is a male real portion The front and back surfaces of the surface layer portion are each attached with a resin sheet over the entire surface including the surface of the front side protruding piece portion and the back surface of the back side protruding piece portion. It is characterized by being.

In the present invention, on the surface of the back layer part, the male part that is fitted into the female part over the entire surface including a part that becomes a back-side protruding piece part that defines a groove in the female part. An easy-sliding layer-like portion that imparts easy-sliding property in the fitting direction may be provided.
Further, in the present invention, one side end portion of the back layer portion is projected outward from the front side protruding piece portion, and the other side end portion of the back layer portion is set to the one side end. It is good also as a structure made to recede inward so that a part could be received.
In the present invention, the back layer portion may have a thickness dimension that is 1/2 or more that of the surface layer portion and a specific gravity that is 2.0 times or more that of the surface layer portion.

  Since the flooring according to the present invention has the above-described configuration, it is possible to improve the familiarity with the floor base while reducing the thickness, and to improve the strength of the actual component on the surface layer side.

(A), (b) shows typically an example of the flooring which concerns on one Embodiment of this invention, (a) is a schematic plan view, (b) is XX in (a). It is a partially broken schematic longitudinal cross-sectional view corresponding to a line arrow. (A) is a schematic disassembled perspective view which shows typically an example of the manufacturing procedure of the same flooring, (b) is a schematic perspective view which shows typically an example of the same flooring. It is a partially broken schematic longitudinal cross-sectional view which shows an example of the construction state of the flooring typically.

Embodiments of the present invention will be described below with reference to the drawings.
1-3 is a figure which shows typically an example of the flooring which concerns on this embodiment.
The flooring 1 according to the present embodiment is provided with a surface layer portion 10 including a wood-based base material 11 provided with a front side protruding piece portion 12 and a back side protruding piece portion 13 in a laminar shape at both end portions. Further, the flooring 1 comprises a sheet-like back layer portion 20 having flexibility on the back side of the surface layer portion 10, and a female real portion 2 with one side end portion 24 and the front side protruding piece portion 12. In addition, the rear side protruding piece 13 on the other side end 25 side is laminated so as to become the male part 3. That is, the female part 2 at one side end of the flooring 1 is constituted by the front side protruding piece 12 of the surface layer 10 and the one side end 24 of the back layer 20, and The male part 3 at the other side end is constituted by the back-side protruding piece 13 of the surface layer part 10.

As shown in FIG. 1A, the flooring 1 has a substantially rectangular shape in plan view. You may make it set suitably the width dimension and length dimension of this flooring 1 from viewpoints, such as the handleability at the time of conveyance, the time of construction, etc. For example, it may be the same size as a general flooring 1 having a size of about 1 (303 mm) × 6 (1818 mm) in plan view, or a size smaller than this, for example, about half the size. It is good also as what was done.
In the present embodiment, the female part 2 and the male part 3 are provided at both ends in the longitudinal direction of the flooring 1, and the female part 2 and the male part 3 are provided at both ends in the width direction of the flooring 1. It has a configuration. That is, front side projecting piece parts 12 and 12 and back side projecting piece parts 13 and 13 are provided at the four circumferential side end parts of the surface layer part 10 in a stacked manner, and the female real parts 2, 2 and 2 are provided at the four circumferential side end parts of the flooring 1. It is set as the structure which provided the male real part 3 and 3. FIG.

As shown in FIG. 3, the flooring 1 is constructed on the floor base 4 so that a plurality of sheets are arranged in the longitudinal direction and the width direction. Further, the actual floor portion 1 and the adjacent floor material 1, 1 are actually joined and constructed so that the female body portion 2 and the male body portion 3 are fitted together.
The floor base 4 on which the floor material 1 is constructed is not limited to the floor base 4 such as floor joists, discarded plywood, concrete base, etc., and the existing floor material surface or the surface of the floor heating panel is used as the floor base 4. Also good.
1B and FIG. 3, the female part 2 and the male part 3 at both ends in the width direction of the flooring 1 are illustrated, but the females at both ends in the longitudinal direction of the flooring 1 are illustrated. The part 2 and the male part 3 have the same shape.

The female real part 2 is provided over the entire circumferential direction in each of one side end in the width direction and one side end in the longitudinal direction of the flooring 1. Moreover, the concave groove of the female real part 2 is opened toward the outer side in the middle part in the thickness direction of the flooring 1, and has a substantially rectangular groove shape. The concave groove is partitioned by the front side protruding piece 12 of the surface layer portion 10 and one side end portion 24 of the back layer portion 20. That is, the one side end portion 24 of the back layer portion 20 constitutes the back side protruding piece portion 24 that partitions the concave groove of the female real portion 2.
The male part 3 is provided over the entire circumferential direction in each of the other side end in the width direction and the other side end in the longitudinal direction of the flooring 1. The rear side protruding piece 13 of the surface layer portion 10 constituting the protruding piece portion of the male part 3 has a shape protruding outward in the middle portion in the thickness direction of the flooring 1 and is substantially rectangular. ing.

The woody base material 11 of the surface layer portion 10 has a substantially rectangular flat plate shape.
This wood base 11 is made of wood such as plywood or LVL (single board laminate), wood board such as particle board, wood fiber board such as insulation board or MDF (medium density fiber board), etc. It may be formed from a material. Moreover, the woody base material 11 was formed from a wood powder / plastic composite material (WPC) in which a synthetic resin material, an inorganic filler, a compatibilizing agent, a colorant, and the like are contained in wood powder at a predetermined content ratio. It may be a thing. Further, the woody base material 11 may have a multilayer structure in which plate materials made of these various materials are laminated.
Moreover, it is good also considering the wood-type base material 11 as MDF whose surface hardness is comparatively favorable.

Moreover, the surface layer part 10 is set as the structure which stuck the resin-type sheet | seats 14 and 15 over the whole surface including the surface of the front side protrusion piece part 12, and the back surface of the back side protrusion piece part 13 on the front and back, respectively. . That is, the surface layer portion 10 has the resin-based sheets 14 and 15 on both the front and back surfaces including the front surface of the front-side protruding piece portion 12 constituting the female real portion 2 and the back surface of the back-side protruding piece portion 13 constituting the male real portion 3, respectively. It is set as the structure stuck on.
The resin-based sheets 14 and 15 are thin sheets. These front and back resin-based sheets 14 and 15 may be provided with a pattern such as a wood grain pattern. The front and back resin-based sheets 14 and 15 may constitute a moisture-proof layer. As these front and back resin-based sheets 14 and 15, for example, synthetic resin sheets such as polyethylene, polypropylene, polyvinyl chloride, and polyethylene terephthalate may be adopted. Alternatively, the front and back resin sheets 14 and 15 may be formed by providing a moisture-proof resin layer on a sheet base material made of paper or the like. The thickness dimensions of the front and back resin-based sheets 14 and 15 may be, for example, about 50 μm to 1.0 mm, and preferably about 0.2 mm to 0.5 mm.

Further, in the present embodiment, the surface layer portion 10 is formed in a laminar shape at the four circumferential end portions so that the female real portion 2 and the male real portion 3 are formed at the four circumferential end portions of the flooring 1 as described above. It is set as the structure which provided the front side protrusion piece part 12 and the back side protrusion piece part 13 in this. That is, the surface layer portion 10 is provided with the front side protruding piece portion 12 on each of one side end portion in the width direction and one side end portion in the longitudinal direction of the surface layer portion 10, and the other side end portion in the width direction of the surface layer portion 10. And the back side protrusion 13 is provided on each of the other side end portions in the longitudinal direction.
The front-side protruding piece 12 has a widthwise one side end portion and a longitudinal direction of the surface layer portion 10 so that a notch-shaped recess (concave step portion) that forms a groove in the female real portion 2 is provided on the back side portion. It is provided at each of the side end portions in one direction. The front-side protruding piece 12 has a protruding front end surface that is a perpendicular surface orthogonal to the front and back surfaces of the flooring 1, and a back surface that is parallel to the front and back surfaces of the flooring 1. In addition, the surface facing the outer side in the floor material surface area of the notch-shaped recess in the rear side portion of the front side projecting piece portion 12 that becomes the groove bottom of the concave groove of the female real part 2 is the surface of the front side projecting piece portion 12. It is a flat surface parallel to the front end surface in the protruding direction.

The width direction of the surface layer portion 10 is such that a notch-shaped recess (concave step portion) capable of receiving the front-side protruding piece portion 12 of the floor material 1 disposed adjacent to the back-side protruding piece portion 13 is provided in the front-side portion. It is provided at each of the other side end and the other side end in the longitudinal direction. The back-side protruding piece 13 has a protruding front end surface that is a perpendicular surface orthogonal to the front and back surfaces of the flooring 1, and a front surface that is parallel to the front and back surfaces of the flooring 1. In addition, the surface facing the outer side in the floor material surface area of the notch-shaped recess in the front side portion of the back side protruding piece 13 is a flat surface parallel to the front end surface in the protruding direction of the back side protruding piece 13. Yes.
The projecting dimensions of the front side projecting piece 12 and the back side projecting piece 13 are substantially the same. Note that, from the viewpoint of suppressing gaps and the like, the protruding dimension of the front protruding piece 12 may be slightly larger than the protruding dimension of the back protruding piece 12.

Moreover, in this embodiment, the thickness dimension in alignment with the floor material thickness direction of these front side protrusion piece parts 12 and back side protrusion piece parts 13 is made into the mutually substantially the same dimension. That is, the thickness dimension of the front-side protruding piece portion 12 and the back-side protruding piece portion 13 is about ½ of the thickness dimension of the surface layer portion 10. In addition, from the viewpoint of actual bonding properties, the thickness dimension of the front side protruding piece part 12 and the back side protruding piece part 13 may be slightly smaller than 1/2 of the thickness dimension of the surface layer part 10.
Moreover, in the example of a figure, the example which provided the chamfering part in the surface side edge part of the 4 times of the surface layer part 10 is shown.

In addition, you may make it form the front side protrusion piece part 12 and the back side protrusion piece part 13 of the surface layer part 10 by cutting the 4 circumference side edge part of the wood type base material 11, etc. FIG. Also, the front and back resin sheets 14 and 15 may be adhered to the front and back surfaces after the front-side protruding piece 12 and the back-side protruding piece 13 are formed on the four-circumferential ends of the wood-based substrate 11. Good. Or after sticking the resin-type sheets 14 and 15 on the front and back, you may make it form the front side protruding piece part 12 and the back side protruding piece part 13.
Further, in the illustrated example, the front side resin-based sheet 14 is illustrated as not being attached to the chamfered portion provided at the surface side edge portion of the surface layer portion 10, but the front-side resin based sheet 14 is not illustrated. Also, it may be attached to the chamfered portion. Further, the front-side resin sheet 14 is arranged on the front surface in the protruding direction of the front-side projecting piece 12 or the surface facing the outer side in the floor surface area of the notch-shaped recess in the front-side portion of the back-side protruding piece 13. You may make it stick so that it may reach. Further, the front-side resin sheet 14 may be attached so as to reach the surface of the back-side protruding piece 13.

Moreover, the thickness dimension of this surface layer part 10 is the viewpoint of ensuring the intensity | strength of the said flooring 1, the viewpoint of aiming at thickness reduction of the said flooring 1, the workability of the front side protrusion piece part 12 and the back side protrusion piece part 13, construction. You may make it set suitably from viewpoints, such as a cutting property in the field. For example, the thickness dimension of the surface layer portion 10 may be a thickness dimension that can be cut with a simple cutting tool such as a cutter knife at the construction site,
It may be about 2.0 mm to 6.0 mm, and preferably about 3.0 mm to 4.0 mm.
Further, the surface of the surface layer portion 10 may be subjected to a color finishing process by painting or the like. In this case, the front end surface in the protruding direction of the chamfered portion or the front side projecting piece portion 12, the surface facing the floor material surface area direction of the notch-shaped recess in the front side portion of the back side protruding piece portion 13, the back side protruding piece portion 13 The surface may also be subjected to a colored finish treatment.

The back layer portion 20 includes a sheet-like soft base material 21 having flexibility.
In the present embodiment, the back layer portion 20 has a thickness dimension that is 1/2 or more that of the surface layer portion 10 and a specific gravity that is 2.0 times or more that of the surface layer portion 10.
The thickness dimension of the back layer portion 20 is such that the floor material 1 is made thinner in terms of the familiarity with the floor base 4 and the shape retention of the back-side protruding piece portion 24 that defines the concave groove of the female real portion 2. It may be set as appropriate from the viewpoint of improving the cutting ability and the cutting ability at the construction site. For example, the thickness dimension of the back layer portion 20 may be a thickness dimension that can be cut with a simple cutting tool such as a cutter knife at the construction site,
It may be about 2.0 mm to 6.0 mm, and preferably about 3.0 mm to 4.0 mm. In the illustrated example, the thickness dimension of the back layer portion 20 is set to be smaller than the thickness dimension of the surface layer portion 10. However, these may be the same as each other or the thickness of the surface layer portion 10. It is good also as a dimension larger than a height dimension. Moreover, the thickness dimension of these surface layer parts 10 and the back layer part 20 is the same dimension as the thickness dimension of the general flooring, or the thickness dimension of the general flooring from the thickness dimension of the said flooring 1 Also, it may be set appropriately so as to be thin.

Moreover, you may make it set suitably the specific gravity of this back layer part 20 from viewpoints, such as the self-weight stability after construction of the said flooring 1, etc. The specific gravity of the back layer portion 20 is appropriately adjusted so that the specific gravity is 2.0 times or more that of the surface layer portion 10 including the wood base material 11 made of MDF having a specific gravity of about 0.4 to 0.8. You may make it set. For example, the specific gravity of the back layer part 20 may be about 0.8 to 4.0, preferably about 2.0 to 4.0. The resin sheets 14 and 15 on the front and back of the surface layer portion 10 are extremely thin as compared to the wood base material 11, so that the specific gravity of the wood base material 11 may be grasped as the specific gravity of the surface layer portion 10. Good. Similarly, the easy-slip layer portions 22 and the non-land absorbing portions 23, which will be described later, provided on the front and back surfaces of the soft base material 21 are also extremely thin as compared with the soft base material 21, so that the specific gravity of the soft base material 21 is set to the back layer. You may make it grasp | ascertain as specific gravity of the part 20. FIG.
Moreover, as the soft base material 21, you may make it employ | adopt sound insulation sheets, such as a comparatively high specific gravity asphalt-type sheet | seat, a rubber sheet, and a soft resin-type sheet | seat.

Moreover, in this embodiment, as shown in FIG.1 (b) and FIG.2 (a), the site | part used as the back side protrusion piece part 24 which divides the ditch | groove of the female real part 2 on the surface of the back layer part 20. As shown in FIG. In addition, an easy-sliding layer-like portion 22 is provided over the entire surface to provide easy slipping in the fitting direction of the male real part 3 fitted into the female real part 2.
The easy-slip layered portion 22 may improve the slipperiness of the surface of the back-side protruding piece portion 24 rather than the surface of the soft base material 21 made of a sound insulating sheet that is relatively difficult to slip as described above. For example, it may be a fiber sheet such as a thin sheet nonwoven fabric or a woven cloth sheet, or may be a fiber sheet such as a reinforcing fiber sheet obtained by processing reinforcing fibers such as glass fibers or carbon fibers into a sheet shape. Further, the easy-slip layer portion 22 may be an adhesive layer that is applied on the soft base material 21 and has a slip property after curing, and is further applied and cured on a fiber sheet laminated on the soft base material 21. It is good also as an adhesive layer with slipperiness later.
The easy-sliding layered portion 22 is thinner than the thickness of the soft base material 21 and may be, for example, about 0.1 mm to 1.0 mm thick.

  In the present embodiment, as shown in FIG. 2, the easy-slip layer portion 22 is an adhesive layer formed by curing an adhesive that bonds the back layer portion 20 and the surface layer portion 10. Further, in the present embodiment, the easy-sliding layer-shaped portion 22 is formed by a plurality of streaks formed by curing an adhesive that extends in a streak shape in the width direction of the flooring material and is spaced apart in the longitudinal direction of the flooring material. It is composed by. With such a configuration, it is possible to suppress a shift in the longitudinal direction between adjacent floor materials 1 and 1 that are long in one direction after the construction of the plurality of floor materials 1 and 1 as described above. it can. In other words, the actual fitting property in the width direction between the adjacent floor materials 1 and 1 can be improved, but it becomes difficult to slide in the longitudinal direction. In addition, although the fitting property to the groove | channel groove depth direction of the male part 3 to the female real part 2 of the longitudinal direction edge part of adjacent floor materials 1 and 1 will fall a little, a soft base material Compared with the case where 21 is exposed, the slipperiness can be improved.

Moreover, in this embodiment, as shown in FIG.1 (b), the uneven surface absorption part 23 which absorbs the unevenness of the floor base 4 is provided in the back surface of the back layer part 20 over the whole surface. That is, the uneven absorption part 23 is provided over the entire back surface of the flooring 1.
As this uneven absorption part 23, it is good also as the fiber sheets 23, such as a nonwoven fabric similar to the above. In addition, the non-land absorbing portion 23 is thinner than the thickness of the soft base material 21 and may be, for example, about 0.1 mm to 1.0 mm thick. .

Moreover, in this embodiment, as shown in FIG.1 (b), the one side edge part 24 of the back layer part 20 is made to protrude outward from the front side protrusion piece part 12, and the other side of the back layer part 20 is used. The side end portion 25 is configured to be retracted inward so that the one side end portion 24 can be received. That is, the projecting dimension of the back side projecting piece portion 24 that defines the concave groove is larger than the projecting dimension of the front side projecting piece portion 12 that defines the concave groove of the female real part 2. You may make it set the protrusion dimension of this back side protrusion piece part 24 suitably from viewpoints, such as an actual fitting property and handling property. For example, the projecting dimension of the rear projecting piece 24 may be about 1.5 to 5 times, preferably about 2 to 4 times the projecting dimension of the front projecting piece 12, and is about 3 times in the illustrated example. An example is shown.
Further, the retreat dimension of the other side end 25 of the back layer portion 20 from the back side protruding piece 13 of the surface layer portion 10 is one side end that becomes the back side protruding piece of the female real part 2. 24 may be an acceptable size. For example, the retracted dimension of the other side end portion 25 may be slightly larger than the projecting dimension of the back-side projecting piece portion 24 from the viewpoint of suppressing push-up and the like.

In addition, the flooring 1 is obtained by laminating and integrating the surface layer part 10 and the back layer part 20 each having an appropriate length dimension and width dimension so as to be shifted from each other in the surface area direction. The female real part 2 and the male real part 3 as described above may be formed at the end.
The flooring 1 may be a flooring material that is placed without being fixed to the floor base 4 with a fastener such as a nail or a screw or an adhesive.

Since the flooring 1 according to the present embodiment has the above-described configuration, it is possible to improve the familiarity with the floor base 4 while reducing the thickness, and to improve the strength of the actual constituent portion on the surface layer side. it can.
That is, on the back side of the surface layer portion 10 in which the front side protruding piece portion 12 and the back side protruding piece portion 13 are provided at both end portions, one side end portion 24 and the front side protruding piece portion 12 constitute the female real part 2. In addition, a sheet-like back layer part 20 having flexibility is laminated so that the back side protruding piece part 13 on the other side end part 25 side becomes the male part 3. Accordingly, the female real part 2 at one side end of the flooring 1 itself is constituted by the front side protruding piece part 12 of the surface layer part 10 and one side end part 24 of the back layer part 20, and the other side end part. The male part 3 is constituted by the back-side protruding piece 13 of the surface layer part 10. Thereby, for example, compared with the structure which provided the female real part and the male real part of this real structure in the both-sides edge part of the wood-type base material of the surface layer side, respectively, while aiming at thickness reduction of flooring 1 itself, it is under floor The familiarity with the ground 4 can be improved. Moreover, although this is possible, the female real part 2 and the male real part 3 of this real structure can be provided in the both ends of the flooring 1.

Moreover, since the one side edge part 24 of the back layer part 20 becomes the back side protrusion piece part 24 which divides the ditch | groove of the female real part 2, the workability | operativity at the time of actual joining can be improved with the softness | flexibility. In addition, when the flooring 1 is installed without fixing the flooring 1 to the floor base 4 with fasteners such as nails or screws or adhesives, the flooring 1 can be removed one by one after construction. It is also relatively easy to exchange them.
In addition, resin-based sheets 14 and 15 are attached to the front and back of the surface layer portion 10 over the entire surface including the front surface of the front-side protruding piece portion 12 and the back surface of the back-side protruding piece portion 13, respectively. Accordingly, warpage, deformation, and the like associated with moisture absorption / release of the surface layer portion 10 including the woody base material 11 can be suppressed. Moreover, since the resin-type sheets 14 and 15 are affixed also on the surface of the front side protrusion piece part 12 of the surface layer part 10, and the back surface of the back side protrusion piece part 13, the female real part 2 and the male real part 3 of the flooring 1 are shown. It is possible to improve the strength of the front side protruding piece 12 and the back side protruding piece 13 of the surface layer portion 10 constituting the structure.

Further, in the present embodiment, the male layer that is fitted into the female real part 2 over the entire surface including the part that becomes the back side protruding piece part 24 that defines the concave groove of the female real part 2 on the surface of the back layer part 20. An easy-sliding layer-like portion 22 that provides easy slipping in the fitting direction of the real part 3 is provided. Accordingly, the slipperiness is improved as compared with the case where the surface of the soft base material 21 constituting the back layer portion 20 is exposed on the surface of the back side protruding piece portion 24 that defines the concave groove of the female real portion 2. The workability at the time of actual joining can be further improved. Moreover, the back layer part 20 and the surface layer part 10 can be laminated | stacked through the easy-slip layer part 22, and the easy-slip layer part 22 is provided only on the surface of the back side protrusion piece part 24 which divides the ditch | groove of the female real part 2. FIG. It can be formed more easily than the one provided with Note that such an easy-slip layer portion 22 may not be provided.
In the present embodiment, the non-land absorbing portion 23 that absorbs the unevenness of the floor base 4 is provided on the entire back surface of the back layer portion 20. Therefore, the unevenness of the floor foundation 4 can be absorbed. In addition, you may make it not provide such a land absorption part 23. FIG.

  Further, in the present embodiment, one side end portion 24 that becomes the back side protruding piece portion of the back layer portion 20 is protruded outward from the front side protruding piece portion 12, and the other side end portion of the back layer portion 20. 25 is configured to be retracted inward so that the one side end 24 can be received. Therefore, the front end surfaces of the front and back side projecting piece portions 12 and 24 that define the concave groove of the female real part 2 are made to be the same plane, or the back side projecting piece portion 24 is retracted inward from the front side projecting piece portion 12. Compared with such a thing, workability can be improved. That is, the male part 3 of the other flooring material 1 can be placed on the back-side protruding piece 24 of the female part 2 of the flooring 1 constructed on the floor base 4, and the workability at the time of actual joining can be improved. It can be improved further. In addition, for example, in the case where the fastener is fastened to the back-side protruding piece 24 of the female real part 2 in order to fix the flooring 1 to the floor base 4, the fastener can be easily fastened. Become. In place of such a mode, the front end surface of one side end portion 24 of the back layer portion 20 may be flush with the front end surface of the front side protruding piece portion 12 that defines the concave groove of the female real portion 2. In addition, the front side protruding piece portion 12 may be retracted inward.

  In the present embodiment, the back layer portion 20 has a thickness dimension that is 1/2 or more that of the surface layer portion 10 and a specific gravity that is 2.0 times or more that of the surface layer portion 10. Therefore, the back layer portion 20 has a higher specific gravity than the surface layer portion 10, and the back layer portion 20 occupies more than half of the floor material weight. Thereby, in addition to the adaptability to the floor substrate 4 due to the flexibility of the back layer part 20, the adaptability to the floor substrate 4 can be further improved by the stability due to its own weight, and after installation on the floor substrate 4 Can be suppressed. As a result, the flooring 1 can be suitably used as a flooring material to be constructed by placing it without being fixed to the floor base 4 with a fastener or an adhesive. Instead of such a mode, the back layer portion 20 may have a thickness dimension less than 1/2 that of the surface layer portion 10 or a specific gravity less than 2.0 times that of the surface layer portion 10.

In the present embodiment, an example in which the surface of the flooring 1 is formed into a flat surface shape is shown, but a decorative groove or the like may be appropriately provided on the surface side of the flooring 1.
Moreover, in this embodiment, although the flooring 1 made into the substantially rectangular shape by planar view is illustrated, it is good also as what was made into the substantially square shape.
Moreover, although the example which provided the female real part 2 and the male real part 3 in the four circumference side edge part of the flooring 1 is shown in this embodiment, a female real part is shown in the both-sides edge part of the flooring 1 at least in one direction. 2 and the male part 3 may be provided.

DESCRIPTION OF SYMBOLS 1 Floor material 2 Female real part 3 Male real part 10 Surface layer part 11 Wood type base material 12 Front side protrusion piece part 13 Back side protrusion piece part 14, 15 Resin type sheet 20 Back layer part 22 Easy slip layer part 24 Back side protrusion part part ( One side edge of the back layer)
25 The other side edge of the back layer

Claims (4)

One side of the flexible sheet-like back layer is provided on the back side of the surface layer part including the wood-based base material. The end portion constitutes a female real part with the front side protruding piece portion, and the back side protruding piece portion on the other side end portion side is laminated so as to become a male real portion,
The flooring material characterized by the resin-type sheet | seat sticking to the front and back of the said surface layer part over the whole surface including the surface of the said front side protrusion piece part, and the back surface of the said back side protrusion piece part, respectively. In claim 1,
On the surface of the back layer portion, the insertion direction of the male real portion to be fitted into the female real portion over the entire surface including the portion that becomes the back side protruding piece portion that defines the concave groove of the female real portion. A flooring material characterized in that an easy-sliding layer-like portion for providing easy-sliding is provided. In claim 1 or 2,
One side end portion of the back layer portion protrudes outward from the front side protruding piece portion, and the other side end portion of the back layer portion is arranged so as to receive the one side end portion. Floor material characterized in that it is structured to recede to the side. In any one of Claims 1 thru | or 3,
The flooring material, wherein the back layer portion has a thickness dimension of 1/2 or more of the surface layer portion and a specific gravity of 2.0 times or more that of the surface layer portion.

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