CN115387571A

CN115387571A - Concealed turnover lock catch paving method for spliced floor card, slotted floor and connecting piece

Info

Publication number: CN115387571A
Application number: CN202211110582.XA
Authority: CN
Inventors: 董烈群
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2022-11-25

Abstract

The concealed turning and locking paving method for the spliced floor card, the slotted floor and the connecting piece are characterized in that a female groove is formed in the middle of the periphery of a floor block, a step and bottom groove structure is formed in the inner wall of the female groove, two ends of the connecting piece are respectively a tooth hook end and an arc plate end, and multi-stage convex teeth are arranged on the outer edge of the tooth hook end; the connecting piece is arranged between the butt joint female grooves, the floor blocks are pressed, the tooth hook end and the arc plate end of the connecting piece are mutually reversed and reversely turned and are respectively and synchronously embedded into the female grooves on the two sides, the connecting piece is tightly locked and hidden in the female grooves to form interlayer direction locks, and the tooth hook end and the arc plate end are respectively embedded into the two female grooves which are butted on the adjacent floor blocks; the splicing is firm and durable; the wooden floor lock catch can be suitable for installing H-shaped, herringbone, fishbone-shaped, hexagonal or square-shaped spliced patterns, and even wood floors with arbitrary polygonal or special-shaped structures in a lock catch manner. When the floor is maintained and replaced, the floor block to be replaced can be detached from any position in the middle of the paved floor by means of tools such as a sucker, and then the periphery of the floor to be replaced is hung with a connecting piece and vertically pressed down.

Description

Concealed turnover lock catch paving method for spliced floor card, slotted floor and connecting piece

Technical Field

The invention belongs to a paving technology of wood floors or imitated wood floors and the like in the decoration engineering of IPC classification E04F15 building floors, and relates to a new technology for paving and splicing floors by using hidden connecting pieces, in particular to a slotted floor and a structure which are matched with each other, and a paving construction method for realizing the close lock catch assembly of floor blocks by clamping, turning and hiding in seams by using the connecting pieces.

Background

Traditional assembled floor multi-finger wood floor blocks or composite floor blocks. The floor block has uniform length, width and thickness, and comprises a flat board, a tongue-and-groove board, a lock catch board and the like. The flat-mouth plate is a floor with a standard processed edge being flat, and can be directly adhered on a cement floor or a block board by glue. Although it is possible to construct the seam vertically as it is removed or replaced, this type of technique is now being used less often because the seam treatment is difficult to meet the construction requirements. The tongue-and-groove floor is installed by means of floor glued between tenon and mortise, the back has deformation-resistant groove, and they are lapped with each other when laying, the common tongue-and-groove floor is fixed on wood keel or rough floor by nails when installing, and the tenon and mortise are coated with glue for adhesion, because the floor is affected by climate and humidity when using, the floor size will shrink when dry, and the floor will absorb water and expand when wet. Causing cracks or bulging at the splice of adjacent floor panels.

The locking floor is a floor with tenons and mortises which are correspondingly arranged on the opposite edges and can be matched with each other, and a locking structure which is difficult to crack is automatically formed after the locking floor is assembled. The lock catch is a structure for connecting the floor blocks by the physical force of the inverted tenon. Generally, the locking force of the lock catch is mainly determined by the connecting force of the tongue and groove of the floor. The tensile force that the hasp floor can bear is related to the chamfer angle and the size of chamfer area. The connecting strength of the locking floor is far higher than that of a flat opening or a bonding floor, and the locking floor can bear larger pulling force. And because the manufacturing difficulty of the locking process is relatively high and the slotting equipment is relatively expensive, the price of the floor board connected by the locking is relatively high.

Along with market development, wood floors or imitated wood floors are increasingly abundant, and further, lock catch mounting splicing floors made of wood floors and imitated wood floors in the market include more types, such as laminated wood floors, multilayer composite wood floors, three-layer composite wood floors, wood floors and stone crystal floors.

However, in the prior art, the locking floor boards in the market mainly have two types, namely glue-free floor boards and glue-free locking floor boards, and in addition, the installation method can be divided into a knocking type locking board and an inclined insertion type locking board, the inclined insertion type locking board is convenient to install, but the ground is slightly uneven, the locking board is easy to separate, and the lower part of the notch is easy to break. It is noted that after the floor boards of this type are installed, the tongue and the groove of the locking device are slightly rotated and deformed by being stepped on to generate frictional noise. In this case, removal by cutting is required and the replacement can only be marginally completed by grinding the edge out of the flat and bonding into a new panel.

It has also been found in the construction and use of the above snap-lock floorings that in the currently used method of laying solid wood floorings, the floorings are usually fixedly connected in the following two ways. In the first connection, a support floor is previously fixed to a floor, and then the floor is adhered to the support floor with glue or nailed to the support floor. The connection mode of the floor is complex in process and difficult to replace. The second kind of connection mode, with the floor tiling subaerial, utilize the mortise and tenon joint structure concatenation of floor piece side fixed between the floor piece.

Although the tongue-and-groove splicing connection mode is convenient to install, due to expansion or contraction of the floor, the floor boards can be separated, and floor bulges or large cracks among the floor boards can occur. Before the wood floor is installed, floor installation expansion joints are calculated and reserved according to the moisture content of the floor and the moisture content balance of wood in a use area and a use environment, otherwise, after the climate changes, the problems of expansion arching, warping, squeezing cracks, contraction joints, treading abnormal sounds and the like often occur due to the dry shrinkage and wet expansion properties of the wood floor. The calculation of the reserved expansion joint for installing the wood floor is a relatively professional and complex work, and the close connection of the lock catch is beneficial to improving the overall quality of the wood floor in the using process. The method for assembling the solid wood floor by the lock catches is to arrange the expansion joints which are reserved for the dry shrinkage and the wet expansion of the wood floor at the periphery and the wall edge of the floor and cover the expansion joints by thick skirting boards or wide dimension transition strips, thereby greatly simplifying the installation procedure of the solid wood floor. When the solid wood floor is processed into the lock catch, on one hand, the tenon and the mortise occupy more floor area than the conventional tongue-and-groove floor, which causes certain waste, and on the other hand, the requirement on the raw material for manufacturing the wood floor is higher because the structural strength of the mortise lock catch is required; making it difficult to reduce the cost of the product. If the wood floor is a precious wood type wood floor, the defect is more prominent.

In order to solve the above problems, a few new technologies are disclosed in succession.

201811001296.3 disclosed by saint paul-Rou-Co of Hunan and a wood floor connecting device and a wood floor installing method thereof realize the installation and fixation of wood floors by arranging the wood floor connecting device between more than two continuous wood floors, wherein the wood floor connecting device comprises a male tenon (1) arranged on the first side of the wood floors; a mother groove (2) arranged at the other side of the wood floor; a connecting piece (3) for connecting adjacent wood floors into a whole; a first bottom back inner concave plane (4), a first bottom back inner concave cambered surface (5), a second bottom back inner concave plane (6), a second bottom back inner concave cambered surface (7), a bottom back arc tooth socket (8) and a bottom back rectangular tooth socket (9) which are arranged on the back surface of the wood floor; a first bottom hanging groove (12) arranged below the tenon (1); a second bottom hanging groove (13) arranged below the mother groove (2); the connecting piece (3) is provided with a rectangular rack (14), an upper inclined T-shaped positioning strip (15) and an arc rack (16).

The wood floor block and the wood floor of 201210199602.5 disclosed by Anhui Yangzi floor stock Co., ltd comprise two adjacent wood floor blocks and a connecting piece for mutually locking the adjacent wood floor blocks; the position of each side surface on the supporting surface of the wood floor block is symmetrically provided with a locking groove which penetrates through two side surfaces adjacent to the side surface; the connecting piece comprises a first locking part, a second locking part and a third locking part; the first locking part and the second locking part are respectively matched with the locking grooves of the adjacent wood floor blocks; the third locking portion is used for locking a tongue formed at the adjoining part of the adjacent wood floor boards.

The technology realizes splicing between two adjacent floor boards by virtue of a connecting piece, but the two adjacent floor boards are spliced in the same layer direction. The connecting pieces are mainly divided into two types, wherein one type is that partial structures are exposed out of the floor joint, and the other type is completely positioned in the floor joint. The actual requirements of connection strength and convenient disassembly and assembly cannot be considered. If the dismouting is changed, must be under construction simultaneously to wider range floor simultaneously, moreover, still fail to solve the pernicious illness of complicacy when the more complicated concatenation pattern design of concatenation.

202121850843.2 floor hasp assemblies that applicant filed and published earlier, including floor and fastener, the side of floor is opened with the mounting groove, the fastener includes first lock body and second lock body, connect the horizontal tie plate between first lock body and the second lock body, the first lock body inserts the mounting groove and installs the floor fixedly; the mounting groove comprises an upper limiting groove at the top, a partition groove transversely extending into the floor and a lower limiting groove at the bottom, and an upward bottom bulge is arranged on the floor outside the lower limiting groove; the first lock body is provided with an upper bulge for clamping and fixing in the upper limiting groove and a side bulge for clamping and fixing in the partition groove, and the first lock body below the side bulge abuts against the bottom bulge.

The 201922056195.2 floor fixing component previously applied and disclosed by the applicant comprises a floor and a locking piece, wherein the side surface of the floor is provided with a mounting groove, the locking piece comprises a left lock body and a right lock body which are connected together, and the left lock body and the right lock body are respectively inserted into the mounting grooves of the floor at two sides to mount and fix the adjacent floor. Because female groove does not adopt the step setting, consequently, after female groove is gone into to the buckle card, often can make the buckle rotatory, the buckle can not be stabilized at an angle with the bottom plate, and the installation is inconvenient. Moreover, the two-point contact occlusion structure is unstable, the connecting piece between the seams is suspended, and the ringing bottom plate can fluctuate up and down when the floor is seriously pressed.

Although in the technical schemes, the structures of the side grooves of the floor and the corresponding connecting pieces are researched, so that the installation convenience and the connection strength of the lock catch are improved at the same time, on the premise of ensuring the tight structural strength of the connecting seam, the traditional method that two adjacent floor layers are spliced in an opposite insertion mode cannot be got rid of, and not only the common I-shaped pattern shown in the attached drawing 1 is paved, but also the mortise lock catch structure is inconvenient to construct and can be installed; during construction, the direction of each floor must be correctly placed according to splicing requirements. For the wood floor with herringbone, fishbone-shaped and hexagonal patterns shown as I, II and III in the attached drawing 2, the problem that other wood floors cannot use a locking structure like splicing the wood floor like a Chinese character 'tian' is solved, and the wood floor can only be pasted and fixed by using a flat opening in the prior art, so that the mounting efficiency is low, the wood floor is not durable, the construction cost is high, and the maintenance cost is high.

Disclosure of Invention

The invention aims to provide a concealed turnover locking paving method for a spliced floor card, a connecting piece structure and a floor block side mother groove slotting structure, wherein the floor block edge slotting structure is accurate and simple, the floor block edge slotting structure is installed in a compression joint mode, the connecting piece is tightly locked, locked and concealed in the mother groove, the splicing is firm, and the pavement and the replacement construction are easy.

The aim of the invention is achieved by the following technical measures: the middle part of the periphery of the floor block is provided with a female groove, the inner wall of the female groove is provided with a step and a bottom groove structure, two ends of the connecting piece are respectively a tooth hook end and an arc plate end, and the outer edge of the tooth hook end is provided with a plurality of stages of convex teeth; the connecting piece is arranged between the butt joint female grooves, the floor blocks are pressed, the tooth hook end and the arc plate end of the connecting piece are mutually reversed and reversely turned and are respectively and synchronously embedded into the female grooves on the two sides, the connecting piece is tightly locked and hidden in the female grooves to form interlayer direction locks, and the tooth hook end and the arc plate end are respectively embedded into the two female grooves which are butted on the adjacent floor blocks; the upper side of the female groove is provided with a vertical straight upper vertical surface, and an upper inclined surface which inclines inwards is arranged between the upper side opening edge of the female groove and the bottom edge of the upper vertical surface; the lower side opening edge of the female groove is provided with groove bottom external teeth protruding in the upward direction in an inclined mode, the top of the groove bottom external teeth is smooth, the lower portion of the outer side of the groove bottom external teeth is provided with a lower arc surface inclined towards the inner bottom, and meanwhile, the upper side opening edge of the female groove is provided with groove top external teeth protruding in an obtuse angle structure between the upper inclined surfaces.

The tooth hook end and the arc plate end are respectively provided with a hook groove and an acute tail groove which are open in the same direction; the outer edge of the tooth hook end is provided with a hook back four-stage tooth, a hook back three-stage tooth, a hook back two-stage tooth and a hook back one-stage tooth which are smoothly protruded outwards in sequence from the back side of the hook wing plate from near to far, and hook inner cambered surfaces are arranged in the hook groove and the inner wall of the hook wing plate; the outer end of the arc wing plate is connected with the arc plate end, the outer edge of the arc plate end protrudes outwards to form an arc shape, the inner edge of the arc plate end and the connecting point of the outer end of the arc wing plate are divided into a long section and a short section, the short section is an acute tail groove with a narrow opening between the inner edge of the short arc tooth and the arc wing plate, and the long section is a blunt tail groove with a wide opening between the inner edge of the long arc tooth and the arc wing plate.

The tooth hook ends and the arc plate ends at the two ends of the connecting piece are respectively embedded into two female grooves of adjacent two floor plates in butt joint; under the clamping state, the long arc tooth crest is tightly pressed on the rear side of the top tooth in the groove of the floor block, the other end of the long arc tooth crest is pressed into the groove between the back-hooked four-level tooth and the back-hooked three-level tooth, the back-hooked one-level tooth is pressed on the rear side of the groove in the groove bottom, the back-hooked two-level tooth is pressed on the inner inclined plane of the groove top, the edges of two sides of the middle connecting plate are clamped between the tops of the outer teeth of two adjacent groove bottoms, the short arc tooth is clamped in the groove bottom, the edge of the hook tooth is clamped in the groove bottom, two floor blocks are tensioned, the vertical surfaces of two adjacent floor blocks are tightly attached, and the top surfaces and the bottom surfaces of the two floor blocks are all parallel and level.

In particular, a plurality of points are locked and positioned between the connecting piece and the inner wall of the female groove.

1) The end edges of the back-hooking third-level teeth and the back-hooking fourth-level teeth respectively abut against the groove bottoms of the front side and the rear side of the groove inner top teeth to form M and N fulcrums, the front edges of the back-hooking first-level teeth are pressed on the rear edges of the grooves in the groove bottoms to form X fulcrums, the end parts of the edge of the back-hooking first-level teeth abut against the front side walls of the grooves in the groove bottoms to form Y fulcrums, and the transition surfaces of the middle connecting plate and the back-hooking inner arc surfaces are pressed on the outer teeth at the groove bottoms to form Z fulcrums;

2) The M fulcrum and the Z fulcrum have a clockwise rotation limiting effect on the tooth hook end, the X fulcrum, the Y fulcrum and the N fulcrum have an anticlockwise rotation limiting effect on the tooth hook end, meanwhile, the Y fulcrum and the M fulcrum also have the function of limiting the tooth hook end from being pulled out of the female groove, and similarly, the X fulcrum and the N fulcrum limit the tooth hook end from entering the female groove;

3) A pentagonal omnidirectional restriction stable limiting locking structure is formed among the M fulcrum, the N fulcrum, the X fulcrum, the Y fulcrum and the Z fulcrum;

4) A stable meshing matching lock catch positioning triangular supporting structure is formed among the N fulcrum, the Y fulcrum and the Z fulcrum, the loosening of forward or reverse rotation of a connecting piece when the floor block is pressed too much is prevented, the splicing strength is guaranteed to be firm, and the floor is prevented from being deformed due to fluctuation.

Particularly, the D floor block is cut and pressed between the C floor block and the G floor block by E and F connectors between the C floor block, the D floor block and the G floor block, and the construction process typically comprises the following steps:

1) C, above the space between the two floor blocks C and G, hanging two connecting pieces E and F into two grooves at two side edges of the floor block D at the same time, wherein middle connecting plates and arc plate ends of the two connecting pieces E and F are respectively hung at the lower sides of the two side edges of the floor block D, and the middle connecting plates are respectively lapped on the lower arc surfaces;

2) Further, the D floor block is pressed downwards, the outer edge of a hook wing plate of the E connecting piece and the outer edge of a hook wing plate of the F connecting piece respectively contact the top edge of the upper vertical surface of the C floor block and the top edge of the upper vertical surface of the G floor block at the same time;

3) In the process of continuously pressing the D floor block, the top edge of the upper vertical surface of the C floor block and the top edge of the upper vertical surface of the G floor block respectively and simultaneously rotate and extrude the tooth hook end of the E connecting piece and the tooth hook end of the F connecting piece into the female grooves respectively, and simultaneously, the arc plate end of the E connecting piece and the arc plate end of the F connecting piece are simultaneously and respectively screwed into the corresponding female grooves;

4) The upper vertical surfaces of two sides of the D floor block are respectively tightly attached to the upper vertical surfaces of the inner sides of the C floor block and the G floor block to be cut downwards simultaneously along with the continuous pressing of the D floor block, the arc plate end of the E connecting piece and the arc plate end of the F connecting piece are respectively and deeply inserted into the corresponding female grooves simultaneously, and the short arc teeth of the E connecting piece and the short arc teeth of the F connecting piece are respectively clamped into the grooves in the bottoms of the corresponding grooves;

5) The tooth hook ends and the arc plate ends at the two ends of the connecting piece are respectively embedded into two female grooves of adjacent two floor plates in butt joint; the two connecting pieces tension the three floor blocks, and the butted upper vertical surfaces are tightly attached, and the top surfaces and the bottom surfaces of the three floor blocks are flush.

Especially, when the installed floor blocks need to be removed, the floor blocks with the tooth hook ends of the connecting pieces embedded in the female grooves on the two sides can be found one by one from the edge to the middle of the whole floor block according to the rule that the connecting pieces are arranged in the positive and negative installation directions at intervals, and the floor block is a target floor block or an adjacent floor block; then, the floor board is lifted up and removed by using a general suction tool, and then the connecting piece is taken out.

Particularly, the depth of the inter-tooth groove between the hook back three-level tooth and the hook back four-level tooth is greater than that of the inter-tooth groove between the hook back one-level tooth and the hook back two-level tooth, and meanwhile, the depth of the inter-tooth groove between the hook back one-level tooth and the hook back two-level tooth is greater than that of the inter-tooth groove between the hook back two-level tooth and the hook back three-level tooth. The depth of the grooves between the second-level teeth and the third-level teeth of the back hook is not more than 1/2 of the depth of the grooves between the third-level teeth and the fourth-level teeth of the back hook.

Particularly, the distance from the upper vertical surface to the outer side of the outer teeth at the bottom of the groove is the same as the thickness of the hook wing plate, and twice the distance is the same as the length of the middle joint plate.

Particularly, a straight groove structure groove bottom inner processing seam is further inwards and horizontally formed between the inner bottom of the inner inclined plane of the groove top and the inner top of the concave groove in the groove bottom. The upper part of the inner inclined plane of the groove top is provided with a micro-bulge, and the micro-bulge is matched with a groove between the hook back secondary tooth and the hook back tertiary tooth in an embedded state.

Particularly, the top teeth in the grooves are of a step structure, namely, the inner walls of the female grooves are arranged in a step mode.

The invention has the advantages and effects that: the edge of the floor block is uniformly provided with a standard female slot matched with the connecting piece, the connecting piece is tightly locked and fixedly embedded in the female slot, and an inter-plate hidden prestressed lock connection structure with supports in the interlayer direction is formed, so that the floor block is firmly spliced and has attractive vision; can be suitable for the lock catch installation of wood floors with any polygonal structures. Particularly, when the floor is maintained and replaced, the floor block to be replaced can be detached from any position in the middle of the paved floor by means of tools such as a sucker, and then the periphery of the floor to be replaced is hung with a connecting piece and is clamped and flattened. The splicing is firm, and the seam is tighter. The vision is beautiful; because the full female slot lock catch structure is adopted, the tenon of the conventional floor is changed into the actual using area, the wood utilization rate is improved, keel materials can be omitted when the floor is paved, the production and control cost is convenient, and the installation working time and materials are saved. Easy to be paved, replaced and constructed. The connecting piece has simple structure, simple and convenient and quick installation and disassembly, can be produced and manufactured by using materials such as various metals and the like, and has wide applicability. The joint has strong adaptability to the change of the ambient temperature and the dry and wet, the joint seam is not easy to break away, the expansion caused by the change of the humidity can be effectively avoided, the surface is compact, and the safety is higher. The surface of the connecting piece is smooth, so that when the front surface of the floor is stressed, the connecting piece is connected with the female groove with small resistance when micro-rotation occurs, and abnormal friction sound is not easy to generate. The disassembly and replacement can be realized only by lifting the damaged floor block by means of a sucker tool, and the operation is simple and convenient. The wood floor lock catch can be suitable for lock catch installation of wood floors with any polygonal structures, and is high in installation efficiency, low in cost and simple to maintain.

Drawings

Fig. 1 is a schematic view of a conventional i-shaped pattern pavement structure.

Fig. 2 is a schematic diagram of a paving structure of herringbone, fishbone and hexagonal patterns.

Fig. 3 is a schematic cross-sectional structure view of the floor board and the edge female groove thereof.

Fig. 4 is a schematic cross-sectional view of the connector of the present invention.

Fig. 5 is a schematic sectional view illustrating adjacent floorboards engaged with each other by a coupling member according to the present invention.

Fig. 6 is a schematic view of a latch structure of the connecting member with the tooth hook end being engaged in the female slot.

Fig. 7 is a schematic diagram of three typical states of the tooth hook end of the connecting piece from being hung in the female slot to being clamped.

Fig. 8 is a schematic view of a dynamic matching structure of a hook back multi-stage tooth and an in-groove top tooth step at a hook end of a connecting piece tooth.

Fig. 9 is a diagram showing the state that the connecting piece is about to rotate to the right position when two adjacent floor boards are clamped in the embodiment 1.

Fig. 10 is a diagram showing the state that the connecting member is locked and embedded in place when two adjacent floor boards in the embodiment 1 are locked and embedded.

FIG. 11 is a schematic view showing two opposite sides of a floor board of the embodiment 2, in which the connecting members are respectively hung to be engaged between the floor boards by pressing.

FIG. 12 shows the embodiment 2 in which the back of the upper tooth hook end of the hanging two connecting pieces is pressed by the top edge of the outer two floorboards and then rotated outwards.

FIG. 13 shows the two lateral connecting pieces in the embodiment 2, the ends of the downward hanging arc plates are screwed into the female grooves of the two lateral floor boards respectively.

Fig. 14 shows two connecting piece tooth hook ends and arc plate ends on two sides of the embodiment 2 synchronously screwed into the corresponding female slots step by step.

FIG. 15 shows two connectors on two sides of the embodiment 2 rotating and clamping the female grooves to make adjacent floor boards clamped and leveled.

FIG. 16 is a flow chart illustrating typical steps of the construction process in example 2.

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention.

The reference numerals include:

the floor block 1, the connecting piece 2, the base layer structure 3, the female groove 11, the tooth hook end 21, the middle joint plate 22, the arc plate end 23, the hook groove 24, the sharp tail groove 25, the blunt tail groove 26, the hook wing plate 27 and the arc wing plate 28; the tooth-shaped structure comprises an upper vertical surface 1101, an upper inclined surface 1102, a groove outer top surface 1103, a groove inner top tooth 1104, a groove top inner inclined surface 1105, a groove bottom inner processing seam 1106, a groove bottom middle groove 1107, a groove bottom inner low arc surface 11071, a groove bottom inner and outer high arc surface 11072, a groove bottom outer tooth 1108, a lower arc surface 1109, a groove top outer tooth 1110, a hook inner arc surface 211, a hook tooth edge 212, a hook back primary tooth 213, a hook back secondary tooth 214, a hook back tertiary tooth 215, a hook back quaternary tooth 216, a short arc tooth 231 and a long arc tooth 232.

Detailed Description

In the invention, as shown in figure 3, a female groove 11 is arranged in the middle of the periphery of a floor block 1, an upright straight upper vertical surface 1101 is arranged on the upper side of the female groove 11, and an upper inclined surface 1102 which inclines inwards is arranged between the upper side opening edge of the female groove 11 and the bottom edge of the upper vertical surface 1101; the lower side opening edge of the female slot 11 is provided with slot bottom external teeth 1108 which protrude in the upward direction, the top of the slot bottom external teeth 1108 is smooth, the lower part of the outer side of the slot bottom external teeth 1108 is provided with a lower arc surface 1109 inclined to the inner bottom, and meanwhile, the upper side opening edge of the female slot 11 is provided with slot top external teeth 1110 protruding in an obtuse angle structure between the upper inclined planes 1102.

The female slot 11 includes a slot outer top surface 1103, a slot inner top tooth 1104, a slot top inner inclined surface 1105, a slot bottom inner processing slit 1106, a slot bottom middle groove 1107 and an upper inclined surface 1102.

Specifically, the front top of the female slot 11 is provided with a straight slot outer top surface 1103, the inner side of the slot outer top surface 1103 protrudes downwards to form a slot inner top tooth 1104, and the rear side of the slot inner top tooth 1104 is connected with a slot top inner inclined surface 1105; the front bottom of the female slot 11 is provided with a slot bottom middle groove 1107 which inclines downwards from the rear side of the slot bottom external teeth 1108 to the inside of the slot.

In the present invention, as shown in fig. 4, the connecting member 2 is also called a snap. The connecting piece 2 is respectively connected with a tooth hook end 21 and an arc plate end 23 through a hook wing plate 27 and an arc wing plate 28 at two opposite sides of a middle connecting plate 22, and the tooth hook end 21 and the arc plate end 23 are respectively provided with a hook groove 24 and an acute tail groove 25 which are open in the same direction; the outer side of the hook wing plate 27 is connected with a tooth hook end 21, the tail end of the tooth hook end 21 is inward rolled and smoothly protruded to form a hook tooth edge 212, the outer edge of the tooth hook end 21 is smoothly and convexly provided with a hook back four-stage tooth 216, a hook back three-stage tooth 215, a hook back two-stage tooth 214 and a hook back one-stage tooth 213 from the rear side of the hook wing plate 27 from near to far, and hook inner arc surfaces 211 are arranged in the hook groove 24 and the inner wall of the hook wing plate 27; the outer end of the arc wing plate 28 is connected with the arc plate end 23, the outer edge of the arc plate end 23 protrudes outwards to form an arc shape, the inner edge of the arc plate end 23 and the connection point of the outer end of the arc wing plate 28 are divided into a long section and a short section, an acute tail groove 25 with a narrow opening is formed between the short section, namely the inner edge of the short arc tooth 231 and the arc wing plate 28, and a blunt tail groove 26 with a wide opening is formed between the long section, namely the inner edge of the long arc tooth 232 and the arc wing plate 28.

In the invention, as shown in fig. 5, a tooth hook end 21 and an arc plate end 23 at two ends of a connecting piece 2 are respectively embedded into two female grooves 11 of 11a and 11B of adjacent floor boards 1a and 1B which are butted; under the clamping state, the long arc teeth 232 tightly push the rear side of the top teeth 1104a in the grooves of the floor block A, the other end of the long arc teeth 1104B is pressed into the grooves between the four-level teeth 216 and the three-level teeth 215 of the back hook, the first-level teeth 213 of the back hook are pressed on the rear side of the middle groove 1107B in the groove bottom, the second-level teeth 214 of the back hook are pressed on the inner inclined plane 1105B in the groove top, the edges of the two sides of the middle joint plate 22 are clamped between the outer teeth 1108a and 1108B in the groove bottom, the short arc teeth 231 are clamped in the middle groove 1107a in the groove bottom, the edge 212 of the back hook is clamped in the middle groove 1107B in the groove bottom, the floor blocks 1a and 1B are tensioned, the upper vertical face 1101a is tightly attached to the upper vertical face 1101B, and the top faces and the bottom faces of the floor blocks 1a and 1B are flush.

In the invention, a multi-point lock catch is formed between the connecting piece 2 and the inner wall of the female groove 11 for positioning. As shown in fig. 6;

1) The end edges of the back-hooking tertiary teeth 215 and the back-hooking quaternary teeth 216 respectively abut against the bottoms of the front and rear side grooves of the groove inner top teeth 1104 to form M and N fulcrums, the front edges of the back-hooking primary teeth 213 are pressed on the rear edges of the groove bottom middle grooves 1107 to form X fulcrums, the end parts of the edge of the back-hooking primary teeth 212 abut against the front side walls of the groove bottom middle grooves 1107 to form Y fulcrums, and the transition surface from the middle connecting plate 22 to the back-hooking inner arc surface 211 is pressed on the groove bottom outer teeth 1108 to form Z fulcrums;

2) The M fulcrum and the Z fulcrum have a clockwise rotation limiting effect on the tooth hook end 21, the X fulcrum, the Y fulcrum and the N fulcrum have an anticlockwise rotation limiting effect on the tooth hook end 21, meanwhile, the Y fulcrum and the M fulcrum also have the effects of limiting the tooth hook end 21 from being pulled out of the female slot 11, and similarly, the X fulcrum and the N fulcrum limit the tooth hook end 21 from entering the female slot 11;

4) Especially, a stable meshing fit lock catch positioning triangular supporting structure is formed among the N fulcrum, the Y fulcrum and the Z fulcrum, so that the forward or reverse rotation looseness of the connecting piece 2 when the floor block 1 is pressed too much is prevented, the firm splicing strength is ensured, and the fluctuating deformation of the floor is avoided.

In the present invention, as shown in fig. 7, the process of screwing the tooth hook end 21 of the connector 2 into the female slot 11 includes:

1) The tooth hook end 21 of the connecting piece 2 is clamped in the female slot 11, the hook tooth edge 212 is clamped in the groove bottom middle groove 1107, the middle connecting plate 22 and the arc plate end 23 are hung on the outer lower side of the female slot 11, and the inner wall of the hook slot 24 and the hook inner arc surface 211 are crimped on the lower arc surface 1109 on the outer lower side of the female slot 11;

2) The tooth hooking edge 212 and a bottom contact point of a groove 1107 in the groove bottom are used as supports, the tooth hooking end 21, the middle connecting plate 22 and the arc plate end 23 turn upwards along the outer tooth 1108 of the groove bottom and a lower arc surface 1109, and the tooth hooking first-stage tooth 213, the tooth hooking second-stage tooth 214 and the tooth hooking third-stage tooth 215 are pressed through the groove inner top tooth 1104 one by one;

3) Collude back of the body one-level tooth 213, collude back of the body second grade tooth 214, collude back of the body tertiary tooth 215 and press the inslot top tooth 1104 one by one, until colluding back of the body four-level tooth 216 card and fix in the inslot top tooth 1104 outside, at this moment, collude the outer fringe of tooth edge 212 and press on the groove 1107 inner wall in the tank bottom, well fishplate bar 22 and arc board end 23 are arranged in mother outside groove 11 horizontally.

In the foregoing, in the state 2), as shown in fig. 8, in fact, the in-groove top tooth 1104 is in a step structure, that is, the inner wall of the female groove 11 adopts a step arrangement, and such a step protrusion structure cooperates with a series of convex points on the outer edge of the tooth hooking end 21 of the connecting element 2 to form a locking system, which functions to increase the engagement point between the outer edge of the tooth hooking end 21 of the connecting element 2 and the inner wall of the female groove 11 of the floor board 1, and to enhance the engagement firmness. And the step function of the in-groove top teeth 1104 is also shown in that the back-hooking first-level teeth 213, the back-hooking second-level teeth 214 and the back-hooking third-level teeth 215 press the in-groove top teeth 1104 one by one, so that the limit and righting functions are achieved, the arc plate end 23 of the connecting piece 2 can smoothly and accurately enter the other butt-jointed female groove 11 and the step caliper is in place, the arc plate end 23 is rotated in place while the tooth hook end 21 is rotated in place, and the lock catches are synchronously formed at the two ends of the connecting piece 2.

In addition, the arrangement of the groove 1107 in the groove bottom has at least three functions, namely, a necessary space is provided for the rotation of the tooth hook end 21 before the tooth hook end is positioned in the female groove 11, the inner wall of the groove 1107 in the groove bottom provides a limiting support for the hook tooth edge 212 of the tooth hook end 21, and the hanging support is provided together with the outer teeth 1108 of the groove bottom for the initial installation of the tooth hook end 21.

In addition, the lower arc surface 1109 is matched with the hook inner arc surface 211. When the rotation process of the connector 2 starts with the hook rim 212 as a fulcrum, the hook inner arc surface 211 presses the lower arc surface 1109 to slide upwards.

The invention is further illustrated by the following figures and examples.

The specific structures or components referred to in the description of the embodiments are only used as a reference for understanding the wood flooring method of the present invention by those skilled in the art, and those skilled in the art can also design or pattern various equivalent or similar technical features without departing from the technical scope or technical spirit of the wood flooring method of the present invention based on the teachings of the embodiments described in the embodiments. It is therefore not appropriate if this description be taken as limiting the scope of protection covered by the claims. The technical solutions equivalent or similar to the laying method of wooden floors of the present invention still belong to the protection scope of the claims of the present invention. In addition, descriptions of well-known functions and constructions are omitted or simplified in the following description, for conciseness.

Example 1: when the adjacent A and B floor boards 1a and 1B are spliced by one connecting piece 2, as shown in the attached fig. 9 and 10, the tooth hook end 21 of the connecting piece 2 is firstly hung and clamped in the female groove 11a of the floor board 1a, the groove between the hook back primary tooth 213 and the hook back secondary tooth 214 is pressed on the groove inner top tooth 1104a in the female groove 11a of the floor board 1a, meanwhile, the arc board end 23 is inserted into the female groove 11B of the floor board 1B in a downward inclined manner, and then the upper inclined plane 1102a and the upper vertical plane 1101a of the floor board 1a are successively pressed downwards on the upper vertical plane 1101B of the floor board 1B; then, the tooth hook end 21, the middle joint plate 22 and the arc plate end 23 are turned upwards, the arc plate end 23 extends into the female groove 11b of the floor block 1b, the last action of the arc plate end 23 is that the outer end of the short arc tooth 231 slides to the bottom in place along the inner wall of the groove 1107b in the groove bottom, and meanwhile, the outer end of the long arc tooth 232 slides outwards along the inner inclined plane 1105b of the groove top until being clamped at the lower side of the inner top tooth 1104b of the groove; the three-level tooth 215 at the back of the hook presses the top tooth 1104a in the groove until the four-level tooth 216 at the back of the hook is clamped outside the top tooth 1104a in the groove, at the moment, the outer edge of the edge 212 of the hook is pressed on the inner wall of the groove 1107a in the groove bottom, the two side edges of the middle joint plate 22 are clamped between the top of the outer teeth 1108a and 1108B at the groove bottoms of the two floor blocks 1a and 1B, the short arc tooth 231 is clamped in the groove 1107B in the groove bottom of the two floor blocks 1B, and the long arc tooth 232 tightly pushes the rear side of the top tooth 1104B in the groove of the two floor blocks 1B. At this time, the boards 1a and 1B are tensioned, the top surface 1101a is attached to the top surface 1101B, and the boards 1a and 1B are flush with each other on the top and bottom surfaces.

In the foregoing, after the floor blocks 1a and 1b are assembled, the floor blocks are firmly and stably placed on the base layer structure 3.

In the foregoing, the upper portion of the inner inclined plane 1105 of the groove top has a micro-protrusion, and the micro-protrusion is matched with the groove between the back hooking secondary tooth 214 and the back hooking tertiary tooth 215 in the embedded state.

In the above, a groove bottom inner processing seam 1106 with a straight groove structure is further horizontally formed inwards between the bottom of the inner side of the groove top inner inclined plane 1105 and the top of the inner side of the groove 1107 in the groove bottom. The groove bottom internal processing slot 1106 provides elastic support for the internal structure of the female groove 11 when the connecting piece 2 is clamped and deformed.

In the above description, the distance from the upper surface 1101 to the outside of the outer teeth 1108 on the bottom of the groove is the same as the thickness of the hook plate 27. Twice the distance is the same length as the intermediate plate 22.

In the foregoing, it is preferable that the distance between the outer end faces of the tooth hook end 21 and the arc plate end 23 of the connecting member 2 is not greater than twice the depth of the female slot 11.

In the foregoing, preferably, the connecting element 2 is made of hard waterproof and corrosion-resistant materials such as aluminum material and polymer composite material, and the hardness of the material of the connecting element 2 is greater than that of the floor block 1.

In the foregoing, preferably, the top of the back-hooking first-stage tooth 213, the back-hooking second-stage tooth 214, the back-hooking third-stage tooth 215, and the back-hooking fourth-stage tooth 216 has an arc curved surface.

In the foregoing, preferably, the depth of the groove between the hook back tertiary tooth 215 and the hook back quaternary tooth 216 is greater than the depth of the groove between the hook back primary tooth 213 and the hook back secondary tooth 214, and meanwhile, the depth of the groove between the hook back primary tooth 213 and the hook back secondary tooth 214 is greater than the depth of the groove between the hook back secondary tooth 214 and the hook back tertiary tooth 215.

In the foregoing, preferably, the depth of the groove between the back-hooking secondary tooth 214 and the back-hooking tertiary tooth 215 is not greater than 1/2 of the depth of the groove between the back-hooking tertiary tooth 215 and the back-hooking quaternary tooth 216.

Example 2: between the C, D and G floor blocks 1C, 1D and 1G, the D floor block 1D is cut and pressed between the C and G floor blocks 1C and 1G by the E and F two connecting

pieces

2E and 2F, and the construction process typically comprises the following steps: as shown in fig. 16; specifically, the steps are as follows in sequence:

1) As shown in fig. 11; c, G two connecting

pieces

2E and 2F are hung in two grooves 11de and df of two side edges of the D floor block 1D above the C and G floor blocks 1C and 1G respectively, middle connecting plates 22E and 22F and arc plate ends 23E and 22F of the E and F two connecting

pieces

2E and 2F are hung on the lower sides of the two side edges of the D floor block 1D respectively, wherein the middle connecting plates 22E and 22F are lapped on a lower arc surface 1109de and a lower arc surface 1109df respectively;

2) Further, as shown in FIG. 12; pressing the D floor block 1D downwards, wherein the outer edge of a hook wing plate 27E of the connecting piece 2E and the outer edge of a hook wing plate 27F of the connecting piece 2F are respectively contacted with the top edge 1101C of the upper vertical surface of the C floor block 1C and the top edge 1101G of the upper vertical surface of the G floor block 1G at the same time;

3) As shown in fig. 13; in the process of continuously pressing the D floor block 1D, the top edge 1101C of the upper vertical face of the C floor block 1C and the top edge 1101G of the upper vertical face of the G floor block 1G respectively and simultaneously rotate and extrude the tooth hook end 21E of the E connecting piece 2E and the tooth hook end 21F of the F connecting piece 2F into the female groove 11de and the female groove df respectively, and simultaneously, the arc plate end 23E of the E connecting piece 2E and the arc plate end 23F of the F connecting piece 2F are simultaneously and respectively screwed into the corresponding female grooves 11C and 11G;

4) As shown in fig. 14; as the D floor block 1D continues to be pressed downwards, the upper vertical faces 1101de and 1101df on two sides of the D floor block 1D are respectively and tightly attached to the upper vertical faces 1101C and 1101G on the inner sides of the C floor block 1C and the G floor block 1G, the arc plate ends 23E of the E connecting piece 2E and the arc plate ends 23F of the F connecting piece 2F are respectively and deeply inserted into the corresponding female grooves 11C and 11G, and the short arc teeth 231E of the E connecting piece 2E and the short arc teeth 231F of the F connecting piece 2F are respectively clamped into the groove 1107C in the groove bottom and the groove 1107G in the groove bottom;

5) As shown in fig. 15; the tooth hook end 21E and the arc plate end 23E at the two ends of the connecting piece 2E are respectively embedded into the two female grooves 11C and 11de of the butt joint of the adjacent C and D floor plates 1C and 1D; tooth hook ends 21F and arc plate ends 23F at two ends of the connecting piece 2F are respectively embedded into two female grooves 11df and 11G of two adjacent D and G floor blocks 1df and 1G which are butted; E. the F two connectors 2e and 2F tension the C, D and G three floor boards 1C, 1D and 1G and make the upper vertical face 1101C and the upper vertical face 1101de cling to each other, so that the upper vertical face 1101df and the upper vertical face 1101G cling to each other, and the top surfaces and the bottom surfaces of the C, D and G three floor boards 1C, 1D and 1G are flush.

In the foregoing, the three floor blocks C, D, G are firmly and stably placed on the base structure 3 after the assembly.

In the embodiment of the invention, after the assembly of the C, D and G floor blocks is finished, flat assembly surfaces are formed between the C and the D and between the D and the G, the assembly seams are tight, and the surfaces of the C, the D and the G floor blocks are provided with the micro chamfer angle grooves.

In the embodiment of the invention, with general specifications, three floor blocks C, D and G are 60 cm long, 15 cm wide and 1.5 cm thick, and a group of four connecting pieces 2 are respectively arranged between C and D and between D and G; C. after the assembly of the three floor blocks D and G is finished, the connection strength is greater than 320 kilograms through a tension test.

In the embodiment of the invention, because the inner wall structure of the female groove 11 is accurately matched with the appearance structure of the connecting piece 2, the floor block 1 and the female groove 11 thereof can be produced in a large-scale factory manner, and the floor block can be conveniently installed on site and can be matched with convenient and fast on-site slotting equipment for use.

In the embodiment of the invention, under the conditions of adjustment or replacement and the like, when the installed or in-use floor block 1 needs to be dismantled, D floor blocks 1D with tooth hook ends 21 of the connecting pieces 2 embedded in the female grooves 11 on two sides can be found one by one from the edge of the whole floor to the middle position according to the rule of interval in the positive and negative installation directions of the connecting pieces 2, and the D floor block 1D is a target floor block or an adjacent floor block; then, the D floor board 1D is lifted up using a general suction cup tool. In the process, enough torque needs to be applied to transmit to the tooth hook end 21, so that the hook back tertiary tooth 215 presses the top tooth 1104 in the groove to deform, and further the hook back secondary tooth 214 and the hook back primary tooth 213 are sequentially screwed out one by one as in a step state; meanwhile, in the process, the arc plate end 23 at the other end of the connecting piece 2 is correspondingly and reversely moved out, and the release of the locking structure is completed.

In the embodiment of the invention, in order to facilitate the splicing of the floor boards 1, based on the multi-stage structure of the back-hooking primary teeth 213, the back-hooking secondary teeth 214, the back-hooking tertiary teeth 215 and the back-hooking quaternary teeth 216 on the tooth hook end 21 of the connecting member 2, the tooth hook end 21 of the connecting member 2 is clamped into the female groove 11 of the floor board 1 in advance to have three typical states;

1) A horizontal state. As shown in the right end of the drawing 7, the tooth hook end 21 is clamped in place, the back-hook three-stage tooth 215 and the back-hook four-stage tooth 216 are respectively clamped in the inner side and the outer side of the groove top tooth 1104 for fixation, at the moment, the outer edge of the hook tooth edge 212 is pressed on the inner wall of the groove bottom middle groove 1107, and the middle connecting plate 22 and the arc plate end 23 are horizontally arranged outside the female groove 11. In this state, the tenon edge in the mortise and tenon locking structure is equivalent to a tenon edge, and the middle joint plate 22 and the arc plate end 23 are required to be flatly inserted or obliquely inserted into the female groove 11 of the other floor block 1, and are clamped, pressed and leveled.

2) And (5) an inclined hanging state. As shown in fig. 8, the inter-groove pressure between the back-hooking secondary teeth 214 and the back-hooking tertiary teeth 215 is on the in-groove top teeth 1104; the inner wall of the groove 1107 in the groove bottom provides a limiting support for the hook tooth edge 212 of the tooth hook end 21; the upper part of the lower cambered surface 1109 at the outer side of the groove bottom outer tooth 1108 is abutted against the inner cambered surface 211. In this state, the connecting element 2 is obliquely hung and clamped in the female groove 11, and the exposed middle connecting plate 22 and the arc plate end 23 of the floor block 1 are obliquely inserted into the female groove 11 of another floor block 1 and clamped and pressed to be flat.

3) A hanging state. As shown in fig. 11, the connecting element 2 is hung in the female groove 11 of the side edge of the floor board 1, the middle plate 22 and the arc plate end 23 of the connecting element 2 respectively hang on the lower side of the side edge of the floor board 1, wherein the middle plate 22 is lapped on the lower arc surface 1109. In this state, as in example 2.

In the embodiment of the invention, in addition to paving the common I-shaped patterns shown in the attached drawing 1, even the herringbone, fishbone and hexagonal patterns shown in I, II and III in the attached drawing 2 and other wood floors spliced like Chinese character tian, even floor blocks 1 with curved edges or special-shaped edges can be provided with any splicing points and provided with butt female grooves 11, the connecting piece 2 is hung in one of the states, and then the floor blocks are clamped into the reserved paving position to be flattened.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art.

The technical content of the invention is fully described in the claims.

Various changes and modifications of the technical solution of the present invention, any modification, equivalent replacement, improvement, etc. made by those skilled in the art without departing from the design concept of the present invention may be included in the protection scope of the present invention.

Claims

1. The concealed turnover lock catch paving method for the spliced floor card comprises the steps that a female groove is formed in the middle of the periphery of a floor block, a step and bottom groove structure is arranged on the inner wall of the female groove, two ends of a connecting piece are respectively a tooth hook end and an arc plate end, and multi-stage convex teeth are arranged on the outer edge of the tooth hook end; the connecting piece is arranged between the butt joint female grooves, the floor blocks are pressed, the tooth hook end and the arc plate end of the connecting piece are mutually reversed and reversely turned and are respectively and synchronously embedded into the female grooves on the two sides, the connecting piece is tightly locked and hidden in the female grooves to form interlayer direction locks, and the tooth hook end and the arc plate end are respectively embedded into the two female grooves which are butted on the adjacent floor blocks;

the upper side of the female groove is provided with a vertical straight upper vertical surface, and an upper inclined surface which inclines inwards is arranged between the upper side opening edge of the female groove and the bottom edge of the upper vertical surface; the lower side opening edge of the female groove is provided with groove bottom external teeth which protrude obliquely upwards, the top of the groove bottom external teeth is smooth, the lower part of the outer side of the groove bottom external teeth is provided with a lower cambered surface inclined towards the inner bottom, and meanwhile, the upper side opening edge of the female groove is provided with groove top external teeth protruding in an obtuse angle structure between the upper inclined surfaces;

the connecting piece is respectively connected with a tooth hook end and an arc plate end through a hook wing plate and an arc wing plate at two opposite sides by a middle connecting plate; the tooth hook end and the arc plate end are respectively provided with a hook groove and an acute tail groove which are open in the same direction; the outer edge of the tooth hook end is provided with a hook back four-stage tooth, a hook back three-stage tooth, a hook back two-stage tooth and a hook back one-stage tooth which are smoothly protruded outwards in sequence from the back side of the hook wing plate from near to far, and hook inner cambered surfaces are arranged in the hook groove and the inner wall of the hook wing plate; the outer end of the arc wing plate is connected with an arc plate end, the outer edge of the arc plate end protrudes outwards to form an arc shape, the inner edge of the arc plate end and the connection point of the outer end of the arc wing plate are divided into a long section and a short section, the short section is an acute tail groove with a narrow opening between the inner edge of the short arc tooth and the arc wing plate, and the long section is an obtuse tail groove with a wide opening between the inner edge of the long arc tooth and the arc wing plate;

the connecting piece joint is under female inslot state, the tight floor piece inslot apical tooth rear side of long arc tooth top, the other end, the inslot apical tooth top is gone into and is colluded back of the body level four class tooth and collude in the three class intertooth grooves in the back of the body level, collude back of the body level one-level tooth and press the recess rear side in the tank bottom, collude back of the body level tooth top on groove top internal inclined plane, well fishplate bar both sides edge block is sat between two adjacent tank bottom external teeth tops, the short arc tooth block is in the groove in the tank bottom, collude the marginal card simultaneously in the groove in the tank bottom, taut two floor blocks, and make on two adjacent facade paste tightly, two equal parallel and level in floor top surface and bottom surface.

2. A concealed turn-over latch paving method for spliced floor cards as claimed in claim 1, wherein between the C, D, G three floor boards (1C), (1D) and (1G), the D floor board (1D) is under-cut and pressed between the C, G floor boards (1C) and (1G) by the E, F two connecting members (2E) and (2F), and the construction process typically comprises the steps of:

1) Respectively and simultaneously hanging two connectors (2E) and (2F) of E and F into two female grooves (11 de) and female grooves (11 df) of two side edges of a D floor block (1D) above a space between C and G floor blocks (1C) and (1G), wherein middle joint plates (22E) and (22F) and arc plate ends (23E) and (22F) of the two connectors (2E) and (2F) of E and F are respectively hung on the lower sides of the two side edges of the D floor block (1D), and the middle joint plates (22E) and (22F) are respectively lapped on a lower arc surface (1109 de) and a lower arc surface (1109 df);

2) Further, the D floor block (1D) is pressed down, the outer edge of a hook wing plate (27E) of the connecting piece E (2E) and the outer edge of a hook wing plate (27F) of the connecting piece F (2F) respectively contact the top edge of the upper vertical surface (1101C) of the C floor block (1C) and the top edge of the upper vertical surface (1101G) of the G floor block (1G) at the same time;

3) In the process of continuously pressing the D floor block 1D, the top edge of the upper vertical face (1101C) of the C floor block (1C) and the top edge of the upper vertical face (1101G) of the G floor block (1G) respectively and simultaneously and rotatably extrude the tooth hook end (21E) of the E connecting piece (2E) and the tooth hook end (21F) of the F connecting piece (2F) into the female groove (11 de) and the female groove (11 df), and meanwhile, the arc plate end (23E) of the E connecting piece (2E) and the arc plate end (23F) of the F connecting piece (2F) are simultaneously and respectively screwed into the corresponding female grooves (11C) and (11G);

4) As the D floor block (1D) is pressed downwards continuously, the upper vertical face (1101 de) and the upper vertical face (1101 df) on two sides of the D floor block (1D) are respectively and closely attached to the upper vertical face (1101C) and the upper vertical face (1101G) on the inner sides of the C floor block (1C) and the G floor block (1G) at the same time, the arc plate end (23E) of the E connecting piece (2E) and the arc plate end (23F) of the F connecting piece (2F) are respectively and deeply inserted into the corresponding female grooves (11C) and (11G) at the same time, and the short arc teeth (231E) of the E connecting piece (2E) and the short arc teeth (231F) of the F connecting piece (2F) are respectively clamped into the groove (1107C) in the groove bottom and the groove (1107G) in the groove bottom;

3. A concealed flip-latch installation method for a spliced floor card as claimed in claim 1, wherein the top teeth of the grooves are in a step structure, i.e. the inner walls of the female grooves are arranged in steps.

4. The concealed turnover locking paving method for the spliced floor card as claimed in claim 1, wherein when the installed floor blocks need to be removed, the floor blocks with the tooth hook ends of the connectors embedded in the female grooves at two sides are found one by one from the edge to the middle of the whole floor block according to the rule of interval in the forward and reverse installation directions of the connectors, and the floor block is a target floor block or an adjacent floor block; then, the floor board is lifted up and removed by using a general suction tool, and then the connecting piece is taken out.

5. The concealed flip-latch installation method of a splice floor card of claim 1, wherein the distance of the upper vertical surface from the outer side of the outer teeth of the slot bottom is the same as the thickness of the hook plate, and twice the distance is the same as the length of the intermediate plate.

6. The method of claim 1, wherein the distance between the tooth hook end of the connector and the outer end surface of the arc plate end is not greater than twice the depth of the female groove.

7. The concealed turn-buckle paving method of a spliced floor card as claimed in claim 1, wherein a groove bottom inner processing seam with a straight groove structure is further horizontally opened inwards between the inner bottom of the inner inclined plane of the groove top and the inner top of the concave groove in the groove bottom.

8. The concealed flip-latch paving method of a splicing floor card according to claim 1, wherein the upper part of the inner inclined plane of the groove top is provided with a micro-protrusion which is matched with the grooves between the back-hooking secondary teeth and the back-hooking tertiary teeth in the embedded state.

9. The construction method of hidden buckling and paving of wood floor pressing card according to claim 1, wherein a multi-point buckling and positioning is formed between the connecting piece and the inner wall of the female slot;

1) The end edges of the back-hooking three-level teeth and the back-hooking four-level teeth respectively abut against the groove bottoms of the front side and the rear side of the top teeth in the groove to form M and N fulcrums, the front edge of the back-hooking one-level teeth presses the rear edge of the groove in the groove bottom to form an X fulcrum, the end part of the edge of the back-hooking one-level teeth abuts against the front side wall of the groove in the groove bottom to form a Y fulcrum, and the transition surface from the middle connecting plate to the inner hook cambered surface presses the outer teeth at the groove bottom to form a Z fulcrum;

4) A stable meshing fit lock catch positioning triangular supporting structure is formed among the N fulcrum, the Y fulcrum and the Z fulcrum, the loosening of forward or reverse rotation of a connecting piece when the floor block is pressed too much is prevented, the splicing strength is guaranteed to be firm, and the floor is prevented from fluctuating and deforming.

10. The concealed turn-over latch paving method of a splicing floor card according to claim 1, wherein the depth of the inter-tooth groove between the back-hooking tertiary tooth and the back-hooking quaternary tooth is greater than the depth of the inter-tooth groove between the back-hooking primary tooth and the back-hooking secondary tooth, and meanwhile, the depth of the inter-tooth groove between the back-hooking primary tooth and the back-hooking secondary tooth is greater than the depth of the inter-tooth groove between the back-hooking secondary tooth and the back-hooking tertiary tooth; the depth of the groove between the hook back secondary tooth and the hook back tertiary tooth is not more than 1/2 of the depth of the groove between the hook back tertiary tooth and the hook back quaternary tooth.