WO2008110112A1

WO2008110112A1 - A wood floor plank and manufacturing and assembling methods thereof

Info

Publication number: WO2008110112A1
Application number: PCT/CN2008/070463
Authority: WO
Inventors: Xiang Lei; Yugang Zhou
Original assignee: Chuzhou Yangzi Wood Industry Co., Ltd
Priority date: 2007-03-13
Filing date: 2008-03-11
Publication date: 2008-09-18
Also published as: CN101265747A; CN100575640C

Abstract

A wood floor plank and manufacturing and assembling methods thereof are provided. The wood floor plank comprises an upper surface (1), a lower surface (2), an interface layer (3), two first side walls (4) and two second side walls (5), in which, a first connecting block (51) extending outwardly in the direction parallel to the upper surface (1) is located at the position on the first side wall (4) adjacent to the upper surface (1), the connecting block (51) is provided with a first groove (6) and a first tongue (53) at the side opposite to the upper surface (1), a second connecting block (52) extending outwardly in the direction parallel to the lower surface (2) is located at the position on the second side wall (5) adjacent to the lower surface (2), and the connecting block (52) is provided with a second groove (57) and a second tongue (7) at the side opposite to the lower surface (2).

Description

Wood floor, manufacturing method thereof, and mounting method

The present invention relates to a wooden floor, and more particularly to a wooden floor which is easy to install and reliable to connect, a manufacturing method thereof, and a mounting method. The present invention is based on a Chinese patent application filed on March 13, 2007, the application number of which is incorporated herein by reference. Background technique

With the continuous improvement of the quality of life, people like to use the higher-grade floor in the home decoration, and the floor that they want to use is not only beautiful and practical, but also easy to install, that is, without complicated steps or special tools. Can be installed. Both of the Chinese patents ZL02123006. 4 and U.S. Patent No. 6,928, 779 disclose a floor having a joint portion, the structure of which is shown in Figure la. The floor comprises an upper surface 31, a lower surface 32 and a central portion 33. The first side wall 34 has a groove 36, and the second side wall 35 has a tongue 37. When installed, the two floors pass through the groove 36. The tongues 37 are engaged by traversing and rotating each other. However, the connecting portion of the floor, that is, the groove 36 and the tongue 37 are meshed in the horizontal direction, and the floor is installed in a direction perpendicular to the thickness of the wooden floor, and the two floors are relatively moved, that is, After the floor is installed, there may be an arching situation. In addition, since the groove 36 of the floor and the tongue 37 have a certain inclination angle, it is not convenient to install. As shown in Fig. 1, Fig. 1 discloses a schematic view of the structure of the floor and its installation process. When installing, it is necessary to tilt a floor at an angle and insert its tongue 37 into the groove 36 of the other floor, as indicated by the arrow in Fig. 1. This will cause people to have some trouble installing the floor. It is generally preferred to use a composite floor with a fiber-based component in the center portion, because the connecting portion has a good elastic deformation capability and is easy to install. If the floor has a reliable connecting part, the connection of the floor is firm and reliable, and it will be more popular. Summary of the invention

The main object of the present invention is to provide a wooden floor which is easy to install and reliable in connection;

Another object of the present invention is to provide a method of manufacturing the wooden floor;

It is still another object of the present invention to provide a method of installing the wooden floor. To achieve the above object, the present invention provides a wooden floor comprising

Upper surface

lower surface;

Forming a core layer intermediate the upper surface and the lower surface;

Adjacent two first side walls perpendicular to the upper surface;

Two second side walls perpendicular to the upper surface and opposite to the two first side walls respectively; a portion on the first side wall adjacent to the upper surface is parallel to the upper surface a first connecting block extending outwardly in a direction, the first connecting block facing away from the upper surface has a first recess extending in a direction parallel to the first side wall and the upper surface a groove and a first tongue, the first groove abuts the first tongue, the first groove abuts the first side wall;

a portion of the second side wall adjacent to the lower surface having a second connecting block extending outward in a direction parallel to the lower surface, the second connecting block having a side opposite to the lower surface a second groove and a second tongue extending in a direction parallel to the second side wall and the lower surface, the second groove abutting the second tongue, the second concave The groove abuts the second side wall.

A specific solution is that the first groove includes a first side surface, a second side surface and an upper bottom surface parallel to the upper surface, and the first groove has a trapezoidal cross section;

The second tongue includes a first side, a second side and an upper plane parallel to the lower surface, the second tongue having a trapezoidal cross section.

More specifically, the upper tongue has a groove extending in a direction parallel to the second side wall and the lower surface.

A further solution is to design the corners of the first groove and the second tongue to be rounded. The invention also provides a method of manufacturing the wooden floor, including

Preparation of rectangular wooden floor semi-finished products;

Forming the first connecting block on a pair of adjacent sides of the semi-finished wood flooring;

The second connecting block is machined on the other adjacent side of the wooden floor semi-finished product.

More specifically, the first connection block is manufactured as follows:

Forming a first straight groove in a direction parallel to the edge extending direction near an edge of the lower surface of the semi-finished product of the wooden floor to form a first side wall;

Cutting a portion of the first straight groove away from the core layer of the first sidewall to form a first tongue Lower plane and second side;

Cutting the first straight groove parallel to the two groove walls of the first side wall to obtain a first groove, and maintaining an angle formed by the first side and the upper bottom surface of the first groove when cutting An acute angle greater than 26 °, the second side of the first groove forms an obtuse angle with the virtual extension surface of the upper bottom surface of less than 150 °; the second connecting block is fabricated as follows:

Forming a second straight groove in a direction parallel to the edge extending direction in the vicinity of the edge opposite to the first side wall of the upper surface of the semi-finished product of the wooden floor to form a second side wall;

Cutting a portion of the core layer of the second straight groove away from the second side wall to form an upper plane and a first side surface of the second tongue;

Cutting a groove along the extending direction of the second tongue toward the upper surface side of the second tongue; cutting the second straight groove parallel to the second side wall and facing away from Obtaining a second groove after the groove wall of the second side wall, and maintaining an angle formed between the second side surface of the second tongue and the virtual extension surface of the upper plane during cutting and the first groove The angle formed by the side and the virtual extension surface of the upper bottom surface is equal in size.

The invention also provides a method of installing the wooden floor, including

Aligning the first groove of the wooden floor to be laid with the second tongue of the adjacent laid wooden floor; applying a downward force to the wooden floor to be laid in a direction perpendicular to the upper surface of the wooden floor, so that Laying the second tongue of the wooden floor to elastically deform and enter the spatial extent of the first groove of the wooden floor to be laid;

The force is continuously applied to the wooden floor to be laid in the same direction until the upper bottom surface of the first groove of the wooden floor to be laid is fitted to the upper surface of the second tongue on which the wooden floor has been laid. DRAWINGS

1 is a schematic view showing the structure of an existing floor and its installation process;

2 is a schematic structural view of a first groove and a first tongue of the wooden floor of the present invention;

3 is a schematic structural view of a second groove and a second tongue of the wooden floor of the present invention;

4a to 4d are schematic views showing the manufacturing process of the first groove and the first tongue of the wooden floor of the present invention; and Figs. 5a to 5d are schematic views showing the manufacturing process of the second groove and the second tongue of the wooden floor of the present invention; Fig. 6a to Fig. 6d is a schematic view of the installation process of the wooden floor of the present invention. The present invention will be further described below in conjunction with the accompanying drawings and embodiments. detailed description

2 is a schematic view showing the structure of the first groove and the first tongue of the wooden floor of the present invention. The exterior of the wooden floor is approximately rectangular or square wooden flooring. The wooden floor is composed of an upper surface 1, a lower surface 2, and a fibrous core-based core layer 3 formed between the upper surface 1 and the lower surface 2, and the four edges of the wooden floor are formed perpendicular to the upper surface 1 a side wall, wherein two adjacent side walls are a first side wall 4 (only one is shown), and the other two side walls respectively opposite to the two first side walls 4 are second side walls 5 (Fig. 3 shows).

At a portion of the first side wall 4 near the upper surface 1, a first connecting block 51 extending outward in a direction parallel to the upper surface 1 is provided, on the side of the first connecting block 51 facing away from the upper surface 1, The first groove 6 and the first tongue 53 , the first groove 6 and the first tongue 53 are both parallel to the first side wall 4 and the upper surface 1 , and are parallel to the first side wall 4 and the upper surface The direction of 1 extends. The first recess 6 abuts the first tongue 53 and the first recess 6 also abuts the first side wall 4. The cross section of the first groove 6 is trapezoidal. The first recess 6 includes a first side surface 10, a second side surface 11 and an upper bottom surface 12, and the upper bottom surface 12 is parallel to the upper surface 1 of the wooden floor. The first side of the first tongue 53 coincides with the second side 11 of the first groove 6, that is, the second side 11 of the first groove 6 is also the first side of the first tongue 53, the first tongue The 53 also includes a lower plane 54 and a second side 55. On the outermost side of the wooden floor there is also a joint surface 9 which is perpendicular to the upper surface 1 and which is adjacent to the upper surface 1. After the wooden floor is installed, the joint surface 9 will closely fit the second side wall 5 of the other wooden floor, which This will be described in detail in the Wood Flooring Installation Method section of this article.

In order to facilitate the processing and installation, the distance from the upper bottom surface 12 of the first groove 6 to the upper surface 1 should be 2/5 of the thickness of the wooden floor, and the thickness of the first groove 6 (ie, the bottom surface 12 of the first groove 6 and the first The distance between the lower plane 54 of a tongue 53 should be slightly less than 1/5 of the thickness of the wooden floor, that is, the distance from the lower plane 54 of the first tongue 53 to the upper surface 1 should be slightly less than 3/5 of the thickness of the wooden floor. At the same time, at the lower end of the first side face 10 of the first recess 6, a connecting surface 58 which is parallel to the upper surface 1 and extends in the direction in which the recess 6 extends is provided. The connecting face 58 connects the first side 10 of the first recess 6 with the first side wall 4.

Furthermore, the angle α 1 formed by the first side 10 of the first recess 6 and the upper bottom surface 12 should be greater than 26. An acute angle formed by the second side surface 11 and the virtual extension surface of the upper bottom surface 12 (the dotted line in the figure) The angle α 2 should be an obtuse angle of less than 150 °, and the angle α 1 and the angle α 2 should preferably be complementary angles, so that the first groove 6 having a trapezoidal cross section forms a bilaterally symmetrical pattern, which is more beautiful and practical. .

Opposite the first side wall 4 is a second side wall 5. Referring to Figure 3, the structure of the second recess and the second tongue of the wooden floor of the present invention is disclosed. As can be seen from the figure, in the vicinity of the first side wall 5 near the lower surface 2, a second connecting block 52 extending outward in a direction parallel to the lower surface 2 is provided, on the second connecting block 52 facing away from the lower surface 2 is provided with a second groove 56 and a second tongue 7 which are both parallel to the second side wall 5 and the lower surface 2, and are parallel to the second The two side walls 5 extend in the direction of the lower surface 2. The second groove 56 is also abutting with the second tongue 7, and the second groove 56 is adjacent to the second side wall 5, and the second tongue 7 is also trapezoidal in cross section.

The shape, size, size and the like of the second tongue 7 correspond to the first groove 6 to ensure that the second tongue can be tightly engaged with the first groove 6 when the wooden floor is installed, and the reliable connection to the wooden floor It is very important.

The second tongue 7 includes a first side 13, a second side 14, and an upper plane 15, and the upper plane 15 is parallel to the upper surface 1 of the wooden floor. The first side of the second recess 56 also coincides with the second side 14 of the second tongue 7, the second side of the second recess 56 coincides with the second side wall 5, while the second recess 56 also includes Bottom surface 57.

The upper plane 15 of the second tongue 7 has a groove 8 extending in parallel with the direction of the second side wall 5 and the lower surface 2 at the same time. The slot 8 includes a first side 18 and a second side 19. When the first side 13 and the second side 14 of the tongue 7 are pressed in the cross-sectional direction of the groove 8, the tongue 7 is elastically deformed such that the first side 18 and the second side 19 of the groove 8 are inward. Tilt, when the squeezing disappears, the tongue 7 can return to its original shape.

Since the first groove 6 and the second tongue 7 are tightly engaged during installation, the shape, size and size of the second tongue 7 should be consistent with each other. Therefore, the distance between the upper plane 15 of the second tongue 7 and the lower surface 2 of the wooden floor should be 3/5 of the thickness of the wooden floor, and the length of the upper surface 15 of the second tongue 7 should be slightly shorter than the length of the bottom surface of the first groove 6. . In addition, the angle α 3 formed by the first side surface 13 of the second tongue 7 and the upper plane 15 should be the same as the angle α 1 formed by the first side surface 10 and the upper bottom surface 12 of the first groove 6 . An acute angle greater than 26°; and an angle α 4 formed by the second side surface 14 and the virtual extension surface of the upper plane 15 (the dotted line in the figure) should be the same as the first side surface 11 and the upper surface 12 of the first recess 6 The angle formed by the virtual extension surface (1 2 is the same size, is an obtuse angle of less than 150 °). Thus, when the wooden floor is installed, the first recess 6 and the second tongue 7 can be tightly engaged. When the wooden floor is installed, if the angle between the first groove 6 and the second tongue 7 contacting each other is a sharp angle, the edges and corners may be worn and the connection of the first groove 6 and the second tongue 7 may be affected. Sex, this is not conducive to the connection of the wooden floor. Therefore, the corners of the first groove 6 and the second tongue 7 contacting each other during the installation of the wooden floor should be rounded, that is, the edge 24 formed by the first side 10 of the first groove 6 and the connecting surface 58 and the first The corner 23 formed by the second side 11 of the recess 6 and the lower plane 54 of the first tongue 53 should be rounded, while the upper plane 15 of the second tongue 7 forms an edge 25 with the first side 13 and an upper plane 15 The corners 26 formed with the second side surface 14, the second side surface 14 of the second tongue 7 and the lower surface 57 of the second groove 56 are also rounded. At the same time, the corners 22 formed by the lower plane 54 and the second side 55 of the first tongue 7 should preferably also be rounded.

After introducing the structure of the wooden floor of the present invention, a method of manufacturing the wooden floor will be described below.

Referring to Figure 4, Figures 4a, 4b, 4c, and 4d are schematic views of four main steps in the manufacture of the first recess 6 and the first tongue 53 of the wooden floor, respectively. The wood flooring of the present invention is mainly used as a semi-finished wood flooring, which is a rectangular or square wooden floorboard which has been cut only by preliminary cutting, and its four edges are not subjected to any processing. As shown in FIG. 4a, when the first groove 6 and the first tongue 53 of the wooden floor are manufactured, the first straight groove 16 is first cut in the direction parallel to the edge extension near one of the edges of the lower surface 2 of the semi-finished product. The depth of the first straight groove 16 should be 3/5 of the thickness of the wooden floor, and the width thereof should coincide with the length of the open end of the first groove 6 opposite to the upper bottom surface 12. After the straight groove 16 is cut, a groove wall opposite to the edge is cut, so that the first side wall 4 of the wooden floor can be formed. Then, as shown in Fig. 4b, a portion of the core layer of the first side wall 4 is cut away from the straight groove 16 and is simply cut to form the lower plane 54 and the joint surface 9 of the first tongue 53. Finally, as shown in FIG. 4c and FIG. 4d, the first straight groove 16 is cut parallel to the two groove walls of the first side wall 4 to form the first groove 6, and the cutting must be performed according to the designed angle. In order to ensure that the angle between the second side 11 of the first recess 6 and the upper bottom surface 12 is the designed angle 1, the angle between the first side surface 10 and the virtual extension surface of the upper bottom surface 12 is a design angle α 2 . At the same time, the corners 24 formed by the first side 10 of the first recess 6 and the connecting surface 58 , the second side 11 of the first recess 6 and the corner 23 formed by the lower plane 54 of the first tongue 53 are rounded. . At the same time, it is preferred that the corners 22 formed by the lower plane 54 and the second side 55 of the first tongue 53 are also rounded. So far, the first side wall 4 of the wooden floor, the first recess 6, and the first tongue 53 are processed.

The processing steps of the second groove 56 and the second tongue 7 of the wooden floor are followed by the first groove 6 and the first tongue 53 The processing steps are similar. 5a, 5b, 5c, and 5d are schematic views of four main steps when the second groove 56 and the second tongue 7 of the wooden floor are processed, respectively. As shown in FIG. 5a, when the second groove 56 and the second tongue of the wooden floor are processed, firstly, the edge of the upper surface 1 of the wooden floor semi-finished product opposite to the first side wall 4 is cut along a direction parallel to the edge extension. The second straight groove 17 is formed, and the depth of the second straight groove 17 should be 3/5 of the thickness of the wooden floor, and at the same time, the inner side of the second straight groove 17 becomes the second side wall 5 of the wooden floor. Then, as shown in FIG. 5b, a part of the core layer 3 facing away from the second side wall 5 is cut off, the upper plane 15 of the second tongue 7 is machined, the corners 25 are machined into rounded corners, and according to the design angle (α 3), the first side 13 of the second tongue 7 is machined to ensure that the angle between the first side of the second tongue 7 and the upper plane 15 is equal to the first angle of the first groove 6 The angle α 1 formed by the side surface 10 and the upper bottom surface 12 is equal in magnitude. Next, as shown in FIG. 5c, a portion of the core layer 3 is cut along the extending direction of the second tongue 7 at the second tongue 7 toward the upper surface 1, and a groove 8 is formed. The depth of the groove 8 should not exceed that of the wood. 1/5 of the thickness of the floor. Finally, as shown in FIG. 5d, the second straight groove 17 is cut parallel to the second side wall 5 and faces the groove wall of the second side wall 5, and the second side surface 14 of the second tongue 7 is machined to make the second The angle α 4 formed by the side surface 14 and the virtual extension surface of the upper plane 15 is equal to the angle α 2 formed by the second side surface 11 of the first groove 6 and the virtual extension surface of the upper bottom surface 12. At the same time, the corners 26 and the corners 27 are processed into rounded corners. Thus, the second groove 56 and the second tongue 7 of the wooden floor are substantially processed. It should be emphasized that the length of the upper plane 15 of the second tongue 7 should be slightly shorter than the length of the upper bottom surface 12 of the first groove 6, when processing the first side 13 and the second side 14 of the second tongue 7, The same method is used on the other two edges. The interference is preferably 0. 03mm~0. 08mm using the same method on the other two edges. After the other first side wall 4 and the first groove 6, the first tongue 53, the second side wall 5, the second groove 56, and the second tongue 7 are processed, finely finished, the wood is finished. The manufacture of the floor.

The wooden floor of the invention is not only simple to manufacture, but also easy to install. The method of installing the wooden floor is described below.

As shown in Fig. 6a, the laid wooden floor 42 has been laid horizontally on the ground, and the second tongue 7 of the wooden floor 42 is facing upward. When installing, the wooden floor 41 to be laid is first placed horizontally, so that the first concave The groove 6 faces downward and the first groove 6 of the wooden floor 41 is aligned with the second tongue 7 of the wooden floor 42. Then, a downward force is applied to the wooden floor 41 in a direction perpendicular to the upper surface 1 of the wooden floor 41, as shown in Fig. 6b, with the corners 24 and the corners 23 of the wooden floor 41 and the corners 25 and edges of the wooden floor 42, respectively. 26 contacts, At this time, the wooden floor 41 and the wooden floor 42 are initially positioned. Then, the force is continued to be applied to the upper surface 1 of the wooden floor 41 in the same direction. As shown in Fig. 6c, the second tongue 7 of the wooden floor 42 is subjected to the first side 10 of the first groove 6 of the wooden floor 41, The first side surface 18 and the second side surface 19 of the groove 8 are inclined in the cross-sectional direction, and the second tongue 7 is elastically deformed and enters the spatial extent of the first groove 6. At this stage, it is necessary to apply a large force which needs to be large enough for the second tongue 7 to be elastically deformed. Finally, a small force is applied to the upper surface 1 of the wooden floor 41 in the same direction, as shown in Figure 6d, until the second tongue 7 of the wooden floor 42 is fully engaged with the first groove 6 of the wooden floor 41, That is, the first side 10 of the first recess 6 is in contact with the first side 13 of the tongue 7 , and the second side 11 of the first recess 6 is in contact with the second side 14 of the second tongue 7 , the first recess The upper bottom surface 12 of the groove 6 is fitted to the upper surface 15 of the second tongue 7. At this time, the second tongue 7 will return to its original shape, and the first groove 6 of the wooden floor 41 and the second tongue 7 of the wooden floor 42 will be firmly connected. At this point, the wooden floor 41 is tightly joined to the wooden floor 42 and the installation is completed.

It can be seen from the above-mentioned wooden floor structure and installation method that the wooden floor connection of the present invention is very reliable, as shown in Fig. 6d, when the wooden floor is installed, in the direction parallel to the upper surface 1 of the wooden floor 41, the wooden floor The first side 10 of the first recess 6 of the 41 is engaged with the first side 13 of the second tongue 7 of the wooden floor 42, the second side 11 of the first recess 6 of the wooden floor 41 and the first of the wooden floor 42 The second side 14 of the two tongues 7 is fitted, and the joint surface 9 of the wooden floor 41 is fitted to the second side wall 5 of the wooden floor 42, thus ensuring that the wooden floor 41 and the wooden floor 42 are parallel to the upper surface of the wooden floor 41. Tight connection in 1 direction.

In a direction perpendicular to the upper surface 1 of the wooden floor 41, the first side 10 of the first recess 6 of the wooden floor 41 conforms to the first side 13 of the second tongue 7 of the wooden floor 42, the first of the wooden floor 41 The second side 11 of a recess 6 fits over the second side 14 of the second tongue 7 of the wooden floor 42, the upper bottom surface 12 of the first recess 6 of the wooden floor 41 and the second tongue 7 of the wooden floor 42 The upper plane 15 is fitted, which ensures a tight connection of the wooden floor 41 and the wooden floor 42 in a direction perpendicular to the surface 1 of the upper wooden floor 41.

Of course, the foregoing describes the installation method of the wooden floor. The method of disassembling the wooden floor is also very simple. As long as a certain force is applied in the opposite direction, the two connected wooden floors can be disengaged, and the process is the reverse process of the foregoing installation process. , will not be discussed in detail here.

It can be seen from the above installation method that when installing the wooden floor of the invention, it is not necessary to use any tools, and the wooden floor to be laid is aligned with the laid wooden floor and perpendicular to the upper surface of the wooden floor. 1 Apply force downwards. It is not necessary to tilt the wooden floor at a certain angle. Ordinary users can install it at home or in the office. At the same time, it is also convenient and convenient to dismantle the wooden floor. Users can install or disassemble the wooden floor at any time according to their needs, which brings great convenience to people's home decoration.

Finally, it should be noted that the core layer of the wooden floor of the present invention is a composite wood floor mainly composed of fiber, and the upper surface 1 and the lower surface 2 may be decorated by a method such as painting or wood grain paper. The wooden floor has a certain tensile strength, compressive strength, shear resistance, and a large elastic deformation ability.

It should be emphasized that the present invention is not limited to the above-described embodiments, such as a change in the angle between the two sides of the tongue and the upper plane, a change in the shape of the groove on the upper portion of the tongue, a change in the processing step, and the like, and should also be included in the present invention. Within the scope of the claims of the invention. Industrial applicability

The wooden floor provided by the invention is convenient to install, and the wooden floor after installation is perpendicular to the thickness of the floor, and the adjacent two floors are not easy to move relatively, and the connection is reliable.

Claims

Claim

Wooden floor, including

Upper surface

lower surface;

Forming a core layer intermediate the upper surface and the lower surface;

Adjacent two first side walls perpendicular to the upper surface;

Two second sidewalls perpendicular to the upper surface and opposite to the two first sidewalls; characterized by:

a portion of the first side wall adjacent to the upper surface having a first connecting block extending outward in a direction parallel to the upper surface, the first connecting block having a side opposite to the upper surface a first groove and a first tongue extending along a direction parallel to the first side wall and the upper surface, the first groove abutting the first tongue, the first concave The groove abuts the first side wall;

2. A wooden floor according to claim 1 wherein:

The first groove includes a first side surface, a second side surface and an upper bottom surface parallel to the upper surface, the first groove has a trapezoidal cross section;

3. The wooden floor according to claim 2, characterized in that:

The upper surface of the second tongue has a groove extending in a direction parallel to the second side wall and the lower surface.

4. The wooden floor according to claim 3, characterized in that: An angle formed by the first side surface of the first groove and the upper bottom surface is an acute angle greater than 26°, and an angle formed by the second side surface of the first groove and the virtual extension surface of the upper bottom surface is less than 150 Obtuse angle of °;

The angle formed by the first side surface of the second tongue and the upper plane is equal to the angle formed by the first side surface and the upper bottom surface of the first groove;

The angle formed by the second side surface of the second tongue and the virtual extension surface of the upper plane is equal to the angle formed by the second extension surface of the first groove and the virtual extension surface of the upper bottom surface.

The wooden floor according to any one of claims 1 to 4, characterized in that:

The edge of the first groove and the second tongue are rounded.

6. The method of manufacturing a wooden floor according to claim 1, comprising

Preparation of rectangular wooden floor semi-finished products;

7. The method of manufacturing a wooden floor according to claim 6, wherein:

The manufacturing method of each of the first connecting blocks is as follows

Cutting a portion of the first straight groove away from the core layer of the first sidewall to form a lower plane and a second side of the first tongue;

Cutting the first straight groove parallel to the two groove walls of the first side wall to obtain a first groove, and maintaining an angle formed by the first side and the upper bottom surface of the first groove when cutting An acute angle greater than 26 °, the second side of the first groove forms an obtuse angle with the virtual extension surface of the upper bottom surface of less than 150°;

The manufacturing method of each of the second connecting blocks is as follows

Forming a second straight groove in a direction parallel to the edge extending direction in the vicinity of the edge opposite to the first side wall of the upper surface of the semi-finished product of the wooden floor to form a second side wall; Cutting a portion of the core layer of the second straight groove away from the second side wall to form an upper plane and a first side surface of the second tongue;

Cutting a groove along the extending direction of the second tongue on the side of the upper surface toward the upper surface;

Cutting the second straight groove parallel to the groove wall of the second side wall and facing away from the second side wall to obtain a second groove, and maintaining the second side of the second tongue when cutting The angle formed by the virtual extension surface of the upper plane is equal to the angle formed by the second extension surface of the first groove and the virtual extension surface of the upper bottom surface.

8. The method of installing a wooden floor according to claim 1, comprising

The force is continuously applied to the wooden floor to be laid in the same direction until the upper bottom surface of the first groove of the wooden floor to be laid is fitted to the upper surface of the second tongue on which the wooden floor has been laid.