CN113700254A

CN113700254A - Dado system

Info

Publication number: CN113700254A
Application number: CN202110988419.2A
Authority: CN
Inventors: 杨炼; 雷文
Original assignee: Guangdong Weifa Household Co ltd
Current assignee: Guangdong Weifa Household Co ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2021-11-26
Anticipated expiration: 2041-08-26
Also published as: CN113700254B

Abstract

The invention relates to the field of home decoration, in particular to a wall panel system, which comprises a wall panel body, a top line assembly, a skirting line assembly and a wall panel connecting assembly, wherein the top line assembly is arranged on the wall panel body; a wall panel connecting component is arranged between the wall panel body and the wall body, and the wall panel body is hung on the wall body; a top line assembly is arranged between the top of the retaining wall body and the ceiling for closing, the top line assembly comprises a square tube and an EV (electric vehicle) pad, the square tube is connected with the ceiling, the EV pad is arranged between the top of the retaining wall body and the square tube, and the square tube and the EV pad are parallel to the top surface of the retaining wall body; the skirting line assembly is installed between the bottom of the wall protection plate body and the ground to close up, the skirting line assembly comprises a transversely extending skirting line section bar which is fixed on the wall body, and the skirting line section bar comprises a bearing part and is arranged below the bottom surface of the wall protection plate body in parallel. The setting of top line subassembly, skirting line subassembly can close up the gap of dado and smallpox, ground, shelters from the gap, has dustproof and waterproof effect, improves the whole pleasing to the eye degree of dado system.

Description

Dado system

Technical Field

The invention relates to the field of home decoration, in particular to a wall panel system.

Background

The wall protecting board is also called dado, wall board and wall protecting decorating board, and is new kind of wall decorating material developed in recent years and with timber as base material. It can replace wooden dado, wall material such as wall paper and wall brick, so it is widely used.

The existing wall panel generally adopts a wall panel connecting assembly to be hung on a wall body, and due to the adoption of a hanging mode, an interval must be reserved between the top and the ceiling to lift the wall panel, meanwhile, the bottom end of the wall panel cannot be well matched with the ground in actual conditions, gaps exist between the top of the wall panel and the ceiling and between the bottom of the wall panel and the ground, and the wall panel is not attractive and needs to be improved.

Disclosure of Invention

In order to overcome the defects of the prior art, the wall panel system is provided, and the top and the bottom can be closed.

The invention is realized by the following technical scheme:

a panel system for protecting a wall: comprises a wall protecting plate body, a top line component, a skirting line component and a wall protecting plate connecting component;

the wall protecting plate body is hung on the wall body through the wall protecting plate connecting component,

a top line component is arranged between the top of the wall protection plate body and the ceiling for closing up,

a skirting line component is arranged between the bottom of the wall protection plate body and the ground for closing,

and the embedded strip is arranged at the joint of the corresponding wall protection plate bodies of the adjacent wall surfaces.

The ceiling line assembly comprises a square pipe and an EV (electric vehicle) pad, the square pipe is connected with the ceiling, the EV pad is arranged between the top of the retaining wall body and the square pipe, and the square pipe and the EV pad are parallel to the top surface of the retaining wall body;

the skirting line assembly comprises a transversely extending skirting line section bar which is fixed on the wall body, and the skirting line section bar comprises a bearing part which is arranged below the bottom surface of the wall protection plate body in parallel.

The setting of apex line subassembly, skirting line subassembly can close up the gap of dado and smallpox, ground, shelters from the gap, has dustproof and waterproof effect, improves the whole pleasing to the eye degree of dado system, and the EV pad can solve the high dimensional error problem to a certain extent, improves the fault-tolerant rate.

Furthermore, the longitudinal section of the skirting line section bar is J-shaped, the bottom of the skirting line section bar is bent and smoothly transits to the ground, and the curved arc surface is designed to facilitate external cleaning and prevent dust from entering.

Further, the skirting line section bar upper portion is extended perpendicularly, for the portion of bearing, the end of the portion of bearing colludes in towards the wall body direction, forms an accommodation space, installs the lamp source in it, has the illumination function, effectively reduces lamp source occupation space simultaneously.

Further, the top line subassembly contracts inwards towards the wall body direction for the lateral surface outside the dado body, can play the effect of the flaw of weakening dado and smallpox juncture to a certain extent.

The wall protecting plate comprises a first wall protecting plate body and a second wall protecting plate body, wherein the first wall protecting plate body and the second wall protecting plate body are vertically or parallelly connected, and the connecting position is embedded with a filler rod to shield gaps.

Further, first dado and second dado mutually perpendicular install, form an external corner, a right angle groove is vertically seted up to the one end of first dado, this right angle groove includes first groove face and second groove face, the second dado is on a parallel with the second groove face and installs at the right angle inslot, a side of second dado supports on the second groove face, reserve a gap between second dado and the first groove face, this gap is the mounting groove, install the fillet in it, the fillet is rectangular section bar, including exposing portion and embedding portion, the embedding portion cartridge is in the mounting groove, exposes the portion and links up first dado and second dado junction. The fillet has the effect of corner protector, prevents that the dado corner from being collided and leading to the damage, has transition corner effect.

Furthermore, the depth of mounting groove is less than the thickness of second dado, and first dado has two corners with second dado junction, is first corner and second corner respectively, the portion that exposes of fillet is the right angle triangular prism, and the summit of first corner and second corner is connected respectively to two acute angle summits of its triangular cross-section, and one of them right angle limit of the portion that exposes forms embedding portion towards the parallel extension of mounting groove. This scheme makes the dado corner wholly be two obtuse angles, has the anticollision function of chamfer, and effectively prevents that the corner from exploding the limit, has and shelters from pleasing to the eye effect.

Furthermore, the first wall panel and the second wall panel are connected in parallel and installed, a gap is reserved in the middle, and a T-shaped insertion strip is installed. The T shape refers to the cross section shape of a fillet, the fillet is used for shielding a gap between two protecting wallboards which are horizontally connected from left to right, the bottom of the T is embedded into the gap, and the top of the T is blocked outside the protecting wallboards.

Furthermore, the wall panel connecting assembly comprises a wall hanging keel and a hanging piece, the hanging piece can be hung on the wall hanging keel, and the wall hanging keel comprises a first abutting end, a wall abutting section, a second abutting end and a buffer strip; the wall body abutting section is used for connecting a wall body, and the upper end and the lower end of the wall body abutting section extend towards the direction far away from the wall body respectively to form a first abutting end and a second abutting end for abutting against the wall protection plate body; the tail end of the second abutting end is provided with a through groove, and a buffer strip is inserted into the through groove; the hanging piece is a bending piece and comprises a hanging buckle part and a board body abutting part, the board body abutting part is used for being connected with the wall protection board body, a hanging buckle groove is formed in the hanging wall keel, and the hanging buckle part is matched with the hanging buckle groove. Adopt two butt portions cooperation buffering strip, reach the function of eliminating the noise, prevent that the revetment body and metal parts collision from sending the noise, the cushioning effect can better protect the revetment body simultaneously, prevents the striking damage, and the while revetment coupling assembling can keep the distance between the revetment body and the wall body, is favorable to ventilating, can avoid the revetment to wet, go mildy, warp, extension revetment body's life.

Furthermore, the hanging piece comprises leveling screws, leveling screw holes are vertically formed in hanging and buckling parts of the hanging piece, the leveling screws are arranged in the hanging and buckling parts, the leveling screws abut against the hanging and buckling grooves, and the height of the hanging piece relative to the wall hanging keel is adjusted. In the actual installation process, a plurality of panel connecting components are generally required to be installed, the conditions of uneven and inclined panels often occur, and the leveling effect of the panels can be realized by the leveling screws, so that the installation is convenient.

Drawings

FIG. 1 is a schematic view of a panel system;

FIG. 2 is a schematic view of the installation of a panel connection assembly;

FIG. 3 is a perspective view of a panel connector assembly;

FIG. 4 is a schematic view of a corner joint structure of a panel;

FIG. 5 is a top view of an external corner engagement structure of a panel;

FIG. 6 is a schematic view of a first panel and a second panel opening;

FIG. 7 is an exploded view of a three-in-one connector;

FIG. 8 is a perspective view of an eccentric;

fig. 9 is a top view of the female corner engagement structure of the panel.

The reference numerals are explained below: a, a wall body; b-a wall protection plate body; a C-ceiling line assembly; C1-Square tube; C2-EV pad; d-skirting line assembly; d1-skirting profile; d11-prop foot; d12-carrier part; d2-light source; e-panel connection assembly; f-ground; g-smallpox; 1-a first panel; 11-right-angled grooves; 111-a first groove face; 112-a second groove face; 113-a mounting groove; 12-a first corner; 2-a second panel; 21-a second corner; 3-fillet; 31-an insert; 32-an exposed portion; 321-a groove; 4-three-in-one connector; 41-expanded colloidal particles; 42-screw rod; 43-eccentric wheel; 5-hanging wall keels; 51-a first abutment end; 52-hanging a buckling groove; 53-wall abutment section; 54-a second abutment end; 541-through groove; 55-buffer strip; 6-hanging parts; 61-hanging the part of the buckle; 62-a plate body abutment; 63-leveling screw holes; 64-leveling screws; 7-a first locking screw; 8-a second locking screw; l-colloidal particle mounting holes; m-screw hole; n-eccentric wheel hole; d-retraction distance.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, a panel system according to a preferred embodiment of the present invention is used for a protective wall a, and includes a panel body B, a ceiling line assembly C, a skirting line assembly D, and a panel connecting assembly E.

Wall body A's top is connected with smallpox G, the gap has between the dado body B top and the smallpox G, this gap encapsulates after dado system mount, adopt installation crest line subassembly C's mode to close up, crest line subassembly C includes square pipe C1 and EV pad C2, square pipe C1 is aluminium section bar, connect smallpox G, EV pad C2 takes the self-adhesion function, paste below square pipe C1 during the installation, can solve the height dimension error problem to a certain extent, EV pad C2, square pipe C1 piles up on the top surface of dado body B in proper order. Preferably, the outer side surface of the top line component C is retracted towards the wall body a relative to the outer side surface of the retaining wall body B (i.e., the outer side surface of the top line component C is lower than the outer side surface of the retaining wall body B on a vertical plane), the retraction distance is d, d is approximately equal to 10mm, and the defect at the junction of the retaining wall body B and the ceiling G can be weakened to a certain extent.

Skirting line subassembly D is installed between dado body B bottom and the ground F and is closed up, and skirting line subassembly D includes the baseboard type material D1 of rectangular shape, and baseboard type material D1's longitudinal section is "J" type, and its bottom is crooked, smooth transition to ground F, and the design of curved cambered surface is convenient for the outside and is cleaned, prevents the dust simultaneously and gets into. Skirting line section bar D1 upper portion is perpendicular to be extended, for bearing part D12, the end of bearing part D12 is colluded towards wall A direction bending inner hook, a accommodation space has been seted up on the surface of bearing part D12 top surface and the contact of dado body B bottom surface, installation LED lamp source D2 in it, parallel arrangement is in dado body B bottom surface below, bearing part D12 top, "J" type top is pressed close to wall A, adopt screw locking on wall A.

In the installation, the installation quantity of dado body B is often greater than 2, like the rectangular cylinder in the hall, dado is all installed around it, and the dado of a plurality of connections installation generally has gap, the not neat scheduling problem of corner linking in connecting bight.

T-shaped insertion strips are often used for connection among a plurality of wall protection plate bodies B which are connected and installed side by side in parallel, and gaps are reserved among adjacent wall protection plate bodies B to be embedded with the T-shaped insertion strips. The T shape refers to the cross section shape of a fillet, the fillet is used for shielding a gap between two protecting wallboards which are horizontally connected from left to right, the bottom of the T is embedded into the gap, and the top of the T is blocked outside the protecting wallboards.

In the embodiment, a connection structure of adjacent wall panels at connection corners is provided, as shown in fig. 4 and 5, when a wall panel body B is a 90-degree corner and an external corner (an internal corner and an external corner are one of building structures, and an internal corner refers to a recessed wall corner, which is also called an internal corner, such as an included angle between a top surface and a peripheral wall, and an external corner refers to a protruding wall corner, which is also called an external corner, such as an included angle formed by two walls at a walkway corner, such as an external corner of a quadrangular square frame and an internal corner of a quadrangle, the first wall panel 1 and the second wall panel 2 are installed on an external corner wall, and the first wall panel and the second wall panel can be hung or laterally installed by using accessories. The first wall panel 1 is attached to a wall surface on one side of a wall body A, a right-angle groove 11 is vertically formed in one end, close to a corner, of the first wall panel 1, and then as shown in fig. 5, the right-angle groove 11 is formed to form two groove surfaces, namely a first groove surface 111 and a second groove surface 112 respectively, the second wall panel 2 is attached to a wall surface on one side, adjacent to the first wall panel 1, of the wall body A and abuts against the second groove surface 112 together, a certain distance is reserved between a vertical surface, adjacent to the attaching surface, of the second wall panel 2 and the first groove surface 111 to form an installation groove 113 for inserting the fillet 3, the fillet 3 is a long-strip profile and comprises an exposed portion 32 and an embedded portion 31, the embedded portion 31 is inserted into the installation groove 113, and the exposed portion 32 of the fillet 3 is installed at the joint of the two wall corners and forms a chamfer.

Because in the prior art, two panels are generally adopted and respectively obliquely cut by 45 degrees and form a right angle, and the acute angle of 45 degrees is cut, so that the tolerance performance of the angle is reduced, an explosive edge is formed, and in the actual assembling process, the fault tolerance rate is low, the problems of a single-side convex angle, a seam leakage and the like are easily formed, the straightness structure of the panel is reserved in the embodiment, namely, as shown in fig. 5, two right angles of a first corner 12 and a second corner 21 are reserved, and the fillet 3 is transitionally jointed between the vertexes of the two right angles, so that the effect of one chamfer is realized. Specifically, the depth of the mounting groove 113 is smaller than the thickness of the second panel 2. When the two parts are equal, the accommodating space for connecting the exposed part 32 of the insertion strip 3 cannot be formed, namely, the two parts are on the same plane, the exposed part 32 of the insertion strip 3 needs to be made thin and flat, and two wall panels are connected, so that a chamfer cannot be formed and the appearance is not attractive; when the depth of the installation groove 113 is smaller than the thickness of the second panel 2, the first corner 12 and the second corner 21 may be formed, and the exposed portion 32 of the molding 3 may be formed in a triangular shape in cross section as shown in fig. 5 to form an obtuse-angle lead angle, or may be formed in a fan shape to form a circular lead angle, etc., to be received in the receiving space formed. That is, one end of the second panel 2 protrudes from the mounting groove 113, a central slot is correspondingly formed to match the exposed portion 32 of the molding 3, and the ends at the two sides of the central slot are respectively provided with the first corner 12 of the first panel 1 and the second corner 21 of the second panel 2.

Preferably, the exposed part 32 of the molding 3 is a right-angled triangular prism, two acute-angled vertexes of the triangular section of the molding are respectively connected with vertexes of the first corner 12 and the second corner 21, one of the right-angled sides of the exposed part 32 extends to form a flange relative to the other right-angled side to form the embedding part 31 for being inserted into the mounting groove 113, a semicircular groove 321 is formed in the surface of the inclined side, and the inclined side extends along the long side direction of the molding 3, so that the weight of the molding itself can be reduced, the cost can be reduced, and the overall design feeling can be improved.

Preferably, the surface of the embedding part 31 is provided with anti-slip teeth to enhance the installation tightness, the length of the embedding part 31 is less than the depth of the installation groove 113, when the length of the embedding part is equal to the depth of the installation groove, the actual installation is not facilitated, the fault tolerance rate is low, and the problem of protrusion of a fillet can be avoided in the actual installation by reducing the length of the embedding part. When the fitting portion 31 is mounted, the fitting portion may be directly tapped into the mounting groove 113, and glue may be applied to the mounting groove 113 in advance to improve the fastening degree.

Referring to fig. 6-8, preferably, the first wall panel 1 and the second wall panel 2 are fixedly connected by a three-in-one connector 4, and the three-in-one connector 4 is connected to the right-angle slot 11, so that the three-in-one connector 4 can be hidden. The three-in-one connecting piece 4 comprises an expansion rubber grain 41, a screw rod 42 and an eccentric wheel 43. First dado 1, second dado 2 are screw in advance, as shown in fig. 6, the spiral shell that is used for on the surface that combines with first dado 1 on the second dado 2 has micelle mounting hole L, embedded expansion micelle 41, the screw rod 42 has been inserted on the expansion micelle 41, perpendicular to second dado 2, a pore is seted up to the second trough face 112 of first dado 1 (the surface that combines together with second dado 2 promptly), for screw rod hole M, supply screw rod 42 to get into, eccentric wheel hole N has been seted up to perpendicular to screw rod hole M on first dado 1, supply eccentric wheel N embedding and rotatory locking screw rod 42 head's the department of expanding.

As shown in fig. 9, when the panel body B is a 90-degree corner, and the inside corner is a corner, the difference from the outside corner is that the right-angle groove 11 is not formed, the first panel 1 and the second panel 2 are directly and vertically installed, the middle gap is a mounting groove 113, the panel strip 3 is embedded, the panel strip 3 is similar to the outside corner connection scheme, the exposed part 32 can be a direct triangular section, and two right-angle sides of the triangular section are respectively tightly attached to the side surfaces of the first panel 1 and the second panel 2. As another preferred scheme, can be for indent circular arc lead angle, be difficult to the deposition like this, the smooth transition of cambered surface is easily cleaned, and fillet 3 has the problem of gap in the reentrant corner in the application of reentrant corner, can well solve the actual installation, effectively shelters from the gap, increases pleasing to the eye degree.

As shown in fig. 2, the wall panel connecting assembly E includes a wall hanging keel 5 and a hanging member 6, the wall hanging keel 5 is fixed on the wall a through a second locking screw 8, the wall panel body B is fixedly connected with the hanging member 6 through a first locking screw 7, and the hanging member 6 can be fastened on the wall hanging keel 5, so that the wall panel body B can be hung on the wall a.

Referring to fig. 2 and 3, the wall-hanging keel 5 includes a first abutting end 51, a wall abutting section 53, a second abutting end 54 and a buffer strip 55, the wall abutting section 53 is provided with a hole for mounting the second locking screw 8, two ends of the wall abutting section extend outward perpendicularly to form two abutting ends, which are the first abutting end 51 and the second abutting end 54, the second abutting end 54 is in a straight strip shape, the end of the second abutting end is provided with a through groove 541, the buffer strip 55 can be inserted therein, and the rubber strip is preferably selected to make the abutting end collide with the wall panel B for sound attenuation, further, the first abutting end 51 is in an L shape, a right-angled hanging groove 52 is formed between the first abutting end and the wall abutting section 53, the hanging groove 52 can be set as a shallow groove, and the interior is pasted with a mute material, so as to further eliminate noise. The hanging member 6 is provided with a corresponding hanging and buckling part 61 which can be buckled into the hanging and buckling groove 52, the top surface of the hanging and buckling part 61 is vertically provided with a leveling screw hole 63, a leveling screw 64 is arranged in the hanging and buckling part, and the screw props against the top surface of the hanging and buckling part 61 to adjust the height of the hanging member 6, thereby leveling the hanging wallboard body B. One side of the top surface of the hanging part 61 extends to form a plate body abutting part 62 for connecting the wall protection plate body B, and the plate body abutting part 62 is provided with a hole for installing the first locking screw 7. Preferably, the mute wall panel comprises at least two mute wall panel connecting assemblies which are arranged in parallel, and installation and leveling are facilitated.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are equally encompassed.

Claims

1. A panel system for protecting a wall (A), characterized in that: comprises a wall protection plate body (B), a top line component (C), a skirting line component (D) and a wall protection plate connecting component (E);

the wall protecting plate body (B) is hung on the wall body (A) through the wall protecting plate connecting component (E);

a top line component (C) is arranged between the top of the wall protection plate body (B) and the ceiling (G) for closing,

a skirting line component (D) is arranged between the bottom of the wall protection plate body (B) and the ground (F) for closing,

and the embedded strip (3) is arranged at the joint of the corresponding wall protection plate bodies (B) of the adjacent wall surfaces.

2. A panel system according to claim 1, wherein: the longitudinal section of the skirting line profile (D1) is J-shaped, the bottom of the skirting line profile is bent and smoothly transits to the ground (F), the upper part of the skirting line profile extends vertically to form a bearing part (D12), and a containing space is formed on the end surface of the bearing part (D12) adjacent to the wall protection plate body (B), and a light source (D2) is installed in the containing space.

3. A panel system according to claim 1, wherein: the dado body (B) has first dado (1) and rather than adjacent second dado (2), first dado (1) and second dado (2) mutually perpendicular installation form an exterior angle, and a right angle groove (11) is vertically seted up to the one end of first dado (1), and this right angle groove (11) include first groove face (111) and rather than vertically second groove face (112), and a side of second dado (2) supports on second groove face (112), reserves a mounting groove (113) between second dado (2) another side and first groove face (111) to supply installation fillet (3).

4. A panel system according to claim 3, wherein: the insertion strip (3) is a long strip-shaped section and comprises an exposed part (32) and an embedded part (31), the embedded part (31) is inserted into the mounting groove (113), and the exposed part (32) is accommodated at the connecting angle of the first wall panel (1) and the second wall panel (2).

5. A panel system according to claim 4, wherein: one end of the second wall panel (2) is beyond the mounting groove (113), a central clamping groove is correspondingly formed in the corresponding position and is used for matching with the exposed part (32) of the insertion strip (3), the end parts positioned at two sides of the central clamping groove are respectively provided with a first corner (12) of the first wall panel (1) and a second corner (21) of the second wall panel (2), the exposed part (32) of the insertion strip (3) is a right-angled triangular prism, two acute-angle vertexes of the triangular section of the insertion strip are respectively connected with vertexes of the first corner (12) and the second corner (21), and one of the right-angled vertexes of the exposed part (32) integrally extends to form an embedding part (31) so as to be placed in towards the mounting groove (113).

6. A panel system according to claim 1, wherein: the first wall panel (1) and the second wall panel (2) are connected side by side and installed, a gap is reserved in the middle, and a T-shaped insertion strip (3) is installed.

7. A panel system according to claim 1, wherein: the wall protecting plate body (B) is provided with a first wall protecting plate (1) and a second wall protecting plate (2) adjacent to the first wall protecting plate body, the first wall protecting plate (1) and the second wall protecting plate (2) are perpendicular to each other and are installed to form an inner angle, a gap is reserved between the inner angle to be an installation groove (113), a fillet (3) is embedded, an exposed part (32) of the fillet is a triangular section, and two right-angle sides of the triangular section are tightly attached to the side faces of the first wall protecting plate (1) and the second wall protecting plate (2) respectively.

8. A panel system according to any of claims 1 to 7, wherein: the wall panel connecting assembly (E) comprises a wall hanging keel (5) and a hanging piece (6), the hanging piece (6) is hung on the wall hanging keel (5), and the wall hanging keel (5) comprises a first abutting end (51), a wall abutting section (53), a second abutting end (54) and a buffer strip (55);

the wall body abutting section (53) is used for connecting a wall body (A), the upper end and the lower end of the wall body abutting section (53) extend towards the direction far away from the wall body (A) respectively to form a first abutting end (51) and a second abutting end (52) for connecting a wall protection plate body (B); the tail end of the second abutting end (52) is provided with a through groove (541) in which a buffer strip (55) is inserted for abutting against the wall protection plate body (B); the first abutting end (51) is L-shaped, and a right-angled hanging buckle groove (52) is formed between the first abutting end and the wall abutting section (53);

the hanging piece (6) is provided with a hanging buckle part (61) used for being buckled in the hanging buckle groove (52), one side of the top surface of the hanging buckle part (61) vertically extends to form a plate body abutting part (62), and the plate body abutting part (62) is transversely provided with a through hole for a mounting pin to connect the plate body abutting part (62) with a wall protection plate body (B).

9. A panel system according to claim 8, wherein: leveling screw holes (63) are vertically formed in the top surface of the hanging buckle part (61), leveling screws (64) are arranged in the hanging buckle part, the screws abut against the top surface of the hanging buckle part (61), and the height of the hanging piece (6) is adjusted.

10. A panel system according to claim 9, wherein: the dado body (B) has first dado (1) and rather than adjacent second dado (2), through installation trinity connecting piece (4) fixed connection between first dado (1) and second dado (2), trinity connecting piece (4) are including expansion micelle (41), screw rod (42) and eccentric wheel (43), the spiral shell has the micelle mounting hole on the surface that is used for combining with first dado (1) on second dado (2), embedded expansion micelle (41), screw rod (42) have been inserted on expansion micelle (41), a screw rod hole is seted up on the surface that first dado (1) and second dado (2) combined together, in order to supply screw rod (42) to get into, the eccentric wheel hole has been seted up to perpendicular to screw rod hole on first dado (1), supply the eccentric wheel embedding and rotatory locking screw rod (42) head.