CN215670695U

CN215670695U - Shingle nail butt joint structure suitable for ceramic tile composite wall board

Info

Publication number: CN215670695U
Application number: CN202121061776.6U
Authority: CN
Inventors: 丁欣欣; 丁泽成; 周东珊; 林显杨; 余广; 高宇臻
Original assignee: Zhejiang Yasha Decoration Co Ltd
Current assignee: Zhejiang Yasha Decoration Co Ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2022-01-28
Anticipated expiration: 2031-05-18

Abstract

The utility model provides a wall panel flush joint structure suitable for a ceramic tile composite wall panel, which relates to the technical field of decoration design and comprises a first plate, a second plate and a connecting part, wherein a first groove is formed in one end, close to the second plate, of the first plate, a second groove is formed in one end, close to the first plate, of the second plate, a first clamping piece is arranged in the first groove, a second clamping piece is arranged in the second groove, the connecting part comprises a connecting plate, a fixing plate and a base plate, at least one part of one end of the connecting plate is located in the first clamping piece, and at least one part of one end, far away from the first clamping piece, of the connecting plate is located in the second clamping piece. The utility model has simple structure and convenient installation, the connecting part is directly connected on the veneer without being arranged on the keel, the ceramic tiles and the keel are not respectively arranged on the two sides of the veneer, the utility model is suitable for the installation and splicing of ceramic tile composite wallboards, the strength of the composite wallboards is guaranteed, the occupied space between the veneer and the wall is small, and the influence on the indoor area after decoration is small.

Description

Shingle nail butt joint structure suitable for ceramic tile composite wall board

Technical Field

The utility model relates to the technical field of decoration design,

in particular, the utility model relates to a shingle flush joint structure suitable for a ceramic tile composite wallboard.

Background

The current decoration industry is developing towards the direction of industrialized modularized installation, generally speaking, wall decoration plate decoration is a commonly adopted decoration method in indoor design, can increase the layering sense of indoor space, and plays a role in beautifying decoration.

The bathroom decoration usually needs to connect adjacent keels, then the keels are installed on the wall, then the veneer is installed on the keels, and finally the ceramic tiles are installed on the veneer, but the installation structure is complex, the construction is difficult and the efficiency is low, so that the dry construction technology of the wall panel is more and more emphasized at present, for example, Chinese patent invention CN110805232A discloses a wallboard flush joint device which comprises a first keel, a second keel, a flush joint sub-piece, a flush joint female piece, a veneer and a wall connecting plate; decorative panels are respectively arranged on the first keel and the second keel; the butt joint sub-piece is installed on the end part of the first keel, and the butt joint female piece is installed on the end part of the second keel; the butt joint sub-component and the butt joint female component are spliced together; the wall connecting plate is arranged on the flush joint female member. Said invention also discloses a construction method. According to the wallboard butt joint device and the construction method disclosed by the utility model, the first keel and the second keel can be spliced together by installing the butt joint sub-piece on the first keel and installing the butt joint female piece on the second keel and inserting the butt joint sub-piece and the butt joint female piece during assembly, so that the construction is convenient, and the construction efficiency is improved.

However, the above-mentioned flat-jointed structure of wall panels still has the following problems: the structure is still complicated, the efficiency is high inadequately during the concatenation, above-mentioned wallboard butt joint structure is fixed on fossil fragments, do not solve behind the decorative board installation ceramic tile in the current bathroom fitment because intensity difference is big between decorative board and the ceramic tile, lead to appearing the problem of warping easily, be not suitable for the installation of the ceramic tile composite wall board of bathroom, and above-mentioned wallboard butt joint structure sets up in one side that the decorative board was kept away from to fossil fragments with wall connection's part, occupation space is big when leading to the decorative board to connect, the indoor area of fitment is little.

Therefore, in order to solve the above problems, it is necessary to design a reasonably efficient flush joint structure of the shingles.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a wall panel butt-joint structure which is simple in structure and convenient to install, the connecting part is not required to be installed on the keel but is directly connected to the veneer, the ceramic tiles and the keel are not influenced to be respectively arranged on two sides of the veneer, the wall panel butt-joint structure is suitable for installation and splicing of ceramic tile composite wallboards, the strength of the composite wallboards is guaranteed, and the connecting part is directly connected to the veneer, so that the occupied space between the veneer and a wall body is small, and the influence on indoor area after decoration is small.

In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:

the utility model provides a shingle nail butt joint structure suitable for ceramic tile composite wall board, includes first board, second board and is used for connecting the connecting portion of first board and second board, the first board is close to the one end of second board is provided with first recess, the second board is close to the one end of first board is provided with the second recess, be provided with first fastener in the first recess, be provided with the second fastener in the second recess, connecting portion include connecting plate, fixed plate and are used for connecting the backing plate of connecting plate and fixed plate, the one end of connecting plate has at least partly to be located in the first fastener, the connecting plate is kept away from the one end of first fastener has at least partly to be located in the second fastener.

Preferably, the first clamping piece is provided with first clamping grooves which are opened towards the connecting plate, the notches of the first clamping grooves are provided with first limiting blocks, the number of the first limiting blocks is two, and the distance between the two first limiting blocks is smaller than the thickness of the connecting plate; the second fastener is provided with the orientation connecting plate open-ended second draw-in groove, the notch of second draw-in groove is provided with the second stopper, the quantity of second stopper is two, and two distance between the second stopper is less than the thickness of connecting plate.

Preferably, the first groove and the second groove are both elongated grooves; a first transverse groove extending along the thickness direction of the first plate is formed in the inner side of the first groove, and at least one part of the first clamping piece is positioned in the first transverse groove; and a second transverse groove extending along the thickness direction of the second plate is arranged in the second groove, and at least one part of the second clamping piece is positioned in the second transverse groove.

Preferably, the connecting plate is parallel to the fixing plate, one end of the backing plate is connected to the middle of the side of the connecting plate close to the fixing plate, and the other end of the backing plate is connected to the middle of the side of the fixing plate close to the connecting plate.

Preferably, one end of the fixing plate is provided with a first screw for connecting the first plate, and the other end of the fixing plate is provided with a second screw for connecting a wall.

Preferably, one side of the fixing plate, which is far away from the connecting plate, is provided with a first screw containing groove for conveniently hiding a screw head of the first screw; one side of the fixing plate, which is close to the connecting plate, is provided with a second screw containing groove used for conveniently hiding a screw head of the second screw.

Preferably, the first clip piece and the second clip piece are both integrally formed elastic pieces.

Preferably, the surfaces of the first fastener piece and the second fastener piece are coated with waterproof coatings.

Preferably, the connecting portion is an integrally molded aluminum alloy member.

Preferably, the first plate and the second plate are provided with ceramic tile pieces on the side edges, and keel pieces are arranged on the sides, far away from the ceramic tile pieces, of the first plate and the second plate.

The utility model discloses a shingle joint structure suitable for a ceramic tile composite wallboard, which has the beneficial effects that: simple structure, simple to operate, connecting portion need not install on fossil fragments, but lug connection does not influence the decorative board both sides and set up ceramic tile and fossil fragments respectively on the decorative board, is applicable to the installation concatenation of ceramic tile composite wall board, and composite wall board's intensity is secure to just because connecting portion lug connection is on the decorative board, occupation space between decorative board and the wall body is little, and is little to the indoor area influence after the fitment.

Drawings

FIG. 1 is a schematic overall structural view of one embodiment of a shingle butt joint construction of the present invention suitable for use in a ceramic tile composite wallboard;

FIG. 2 is a schematic view of the installation and disassembly of a flush joint structure of a wall panel suitable for a ceramic tile composite wall panel according to the present invention;

in the figure: 1. the first board, 11, first recess, 111, first transverse groove, 12, first fastener, 121, first draw-in groove, 122, first stopper, 2, second board, 21, second recess, 211, second transverse groove, 22, second fastener, 221, second draw-in groove, 222, second stopper, 3, connecting portion, 31, connecting plate, 32, fixed plate, 321, first screw, 322, second screw, 323, first nail holding groove, 324, second nail holding groove, 33, backing plate, 4, ceramic tile spare, 5, keel spare.

Detailed Description

The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the modules and steps set forth in these embodiments and steps do not limit the scope of the utility model unless specifically stated otherwise.

Meanwhile, it should be understood that the flows in the drawings are not merely performed individually for convenience of description, but a plurality of steps are performed alternately with each other.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and systems known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

The first embodiment is as follows: as shown in fig. 1 to 2, which are only one embodiment of the present invention, a shingle butt joint structure for a ceramic tile composite wall panel includes a first plate 1, a second plate 2, and a connecting portion 3 for connecting the first plate 1 and the second plate 2, a first groove 11 is arranged at one end of the first plate 1 close to the second plate 2, a second groove 21 is arranged at one end of the second plate 2 close to the first plate 1, a first clamping piece 12 is arranged in the first groove 11, a second clamping piece 22 is arranged in the second groove 21, the connecting portion 3 includes a connecting plate 31, a fixing plate 32, and a backing plate 33 for connecting the connecting plate 31 and the fixing plate 32, one end of the connecting plate 31 is at least partially positioned in the first clamping piece 12, and one end of the connecting plate 31 far away from the first clamping piece 12 is at least partially positioned in the second clamping piece 22.

In the present invention, the first panel 1 and the second panel 2 are two adjacent veneers, the connecting portion 3 serves to connect the first panel 1 and the second panel 2, and in fact, the connecting portion 3 also serves to fix the whole of the first panel 1 and the second panel 2 after being connected to the wall.

The structure of the first board 1 and the second board 2 is provided, a first groove 11 is formed in one end, close to the second board 2, of the first board 1, a second groove 21 is formed in one end, close to the first board 1, of the second board 2, a first clamping piece 12 is arranged in the first groove 11, and a second clamping piece 22 is arranged in the second groove 21.

Then, the structure of the connecting part 3, the connecting part 3 includes a connecting plate 31, a fixing plate 32 and a backing plate 33 for connecting the connecting plate 31 and the fixing plate 32, at least a part of one end of the connecting plate 31 is located in the first clamping piece 12, at least a part of one end of the connecting plate 31 far away from the first clamping piece 12 is located in the second clamping piece 22, that is, one end of the connecting plate 31 of the connecting part 3 is inserted into the first clamping piece 12 in the first groove 11 of the end of the first plate 1, and the other end is inserted into the second clamping piece 22 in the second groove 21 of the end of the second plate 2, so that the connection between the first plate 1 and the second plate 2 can be completed.

In addition, in order to fixedly mount the whole of the connection of the first plate 1 and the second plate 2 to the wall, one end of the fixing plate 32 is provided with a first screw 321 for connecting the first plate 1, and the other end of the fixing plate 32 is provided with a second screw 322 for connecting the wall.

Here, the connecting plate 31 is disposed in parallel with the fixing plate 32, one end of the backing plate 33 is connected to the middle of the connecting plate 31 on the side close to the fixing plate 32, and the other end of the backing plate 33 is connected to the middle of the fixing plate 32 on the side close to the connecting plate 31, that is, the connecting portion 3 forms an i-shaped member, the two ends of the fixing plate 32 are respectively contacted with the side surfaces of the first plate 1 and the second plate 2, and the part of the fixing plate 32 contacted with the side edge of the first plate 1 completes the connection of the fixing plate 32 and the first plate 1 by inserting the first screw 321; the portion of the fixing plate 32 contacting the side of the second plate 2 is connected to the wall by the second screw 322.

In summary, the steps when the first plate 1 and the second plate 2 are mounted by the connecting portion 3 are as follows: s1: mounting a first clip member 12 at a first recess 11 of the first plate 1 and a second clip member 22 at a second recess 21 of the second plate 2; s2: connecting the connecting part 3 with the first plate 1, so that one end of the connecting plate 31 of the connecting part 3 is inserted into the first clamping piece 12 and inserted into the first plate 1 through the fixing plate 32 by a first screw 321 to complete the connection of the connecting part 3 with the first plate 1; s3: the whole body of the connecting part 3 and the first plate 1 is installed on the wall body, and the second screw 322 penetrates through the fixing plate 32 and is inserted into the wall body, so that the installation of the connecting part 3 and the wall body is completed; s4: lifting the second plate 2 to the side of the first plate 1 close to the connecting part 3, so that one end of the connecting plate 31 far away from the first clamping piece 12 is inserted into the second clamping piece 22 of the second plate 2, and the connection of the second plate 2 and the connecting part 3 is completed; s5: and repeating the steps to splice all the veneers on the wall body in sequence.

It should be noted that, the first plate 1 and the second plate 2 are provided with tile pieces 4 on the sides, and the first plate 1 and the second plate 2 are provided with keel pieces 5 on the sides far away from the tile pieces 4. First board 1 and second board 2 are the decorative board, and ceramic tile spare 4 has been laid to one side of decorative board like this, and the opposite side of decorative board is provided with the fossil fragments spare 5 of metal system, can realize the combination of three kinds of materials of ceramic tile, base plate, metal like this, forms the sandwich combination on the material, and the compound shingle of ceramic tile that forms can control shingle deformation effectively.

Here, just because the connection position of the connection part 3 and the first and

second plates

1 and 2 is not located on the keel 5 behind the connection part, but the connection part 3 is directly connected with the plate bodies of the first and

second plates

1 and 2, the connection part 3 can be directly connected with the plate bodies of the first and

second plates

1 and 2 with stable structure because the combination of the three materials of the first and

second plates

1 and 2 has higher strength; just because the connecting part 3 is directly connected with the plate bodies of the first plate 1 and the second plate 2, the keel members 5 behind the first plate 1 and the second plate 2 can be freely combined to improve the self-strength of the first plate 1 and the second plate 2.

Certainly, the connecting portion 3 is directly connected with the panel body of the veneer (the first panel 1 or the second panel 2), the distance between the veneer and the wall body is only the thickness of the connecting portion 3, and compared with the situation that the connecting portion 3 is connected with the veneer through the keel, the distance between the veneer and the wall body is the sum of the thicknesses of the connecting portion 3 and the keel, the connecting mode in the utility model enables the distance between the veneer and the wall body to be effectively reduced, and the indoor space after decoration is more spacious.

The wall panel butt joint structure suitable for the ceramic tile composite wallboard is simple in structure and convenient to install, the connecting part is not required to be installed on the keel but is directly connected to the veneer, the ceramic tiles and the keel are not arranged on two sides of the veneer respectively, the wall panel butt joint structure is suitable for installation and splicing of the ceramic tile composite wallboard, the strength of the composite wallboard is guaranteed, and the connecting part is directly connected to the veneer, so that the occupied space between the veneer and a wall body is small, and the influence on the indoor area after decoration is small.

In the second embodiment, as shown in fig. 1 to 2, which is only one embodiment of the present invention, based on the first embodiment, in the wall panel butt joint structure of the tile composite wall panel of the present invention, the first clip 12 is provided with a first clamping groove 121 opening toward the connecting plate 31, a notch of the first clamping groove 121 is provided with two first stoppers 122, and a distance between the two first stoppers 122 is smaller than a thickness of the connecting plate 31; the second clip 22 is provided with a second slot 221 opening towards the connecting plate 31, a second stopper 222 is arranged on a notch of the second slot 221, the number of the second stoppers 222 is two, and the distance between the two second stoppers 222 is smaller than the thickness of the connecting plate 31.

That is, one end of the connecting plate 31 is inserted between two first stoppers 122 in the first engaging groove 121 of the first engaging piece 12, and is caught by the two elastically extending first stoppers 122; similarly, the other end of the connecting plate 31 is inserted between the two second stoppers 222 in the second slot 221 of the second clip piece 22, and is blocked by the two elastically extending second stoppers 222, so that the connection between the first clip piece 12 and the second clip piece 22 is completed through the two ends of the connecting plate 31.

In addition, the first groove 11 and the second groove 21 are both elongated grooves; a first transverse groove 111 extending along the thickness direction of the first plate 1 is arranged on the inner side of the first groove 11, and at least one part of the first clamping piece 12 is positioned in the first transverse groove 111; a second transverse groove 211 extending along the thickness direction of the second plate 2 is arranged in the second groove 21, and at least a part of the second clip piece 22 is positioned in the second transverse groove 211. The first clamping piece 12 is actually clamped into the first groove 11 from the end part of the first groove 11, so that the first clamping piece 12 can be prevented from falling off from the notch of the first groove 11; similarly, the second catching piece 22 is also caught into the second groove 21 from the end of the second groove 21, so that the second catching piece 22 is prevented from falling off from the notch of the second groove 21.

In a word, the first plate 1 is connected with the first clamping piece 12, the first clamping piece 12 is connected with the connecting plate 31, the other end of the connecting plate 31 is connected with the second clamping piece 22, and the second clamping piece 22 is connected with the second plate 2, so that the connection of the first plate 1 and the second plate 2 is completed.

And, there are two kinds of modes of connection of first board 1 and second board 2 and fossil fragments piece 5:

firstly, the keel piece 5 is a U-shaped light steel keel, two grooves are arranged on one side of the first plate 1 far away from the tile piece 4, and two side edges of the keel piece 5 are just embedded into the two grooves to complete the connection of the keel piece 5 and the first plate 1; the connection of the second plate 2 and the keel piece 5 is also the same;

and the second method comprises the following steps: first board 1 is kept away from one side of ceramic tile spare 4 is provided with protruding cavity, keel spare 5 has at least partly to be located protruding cavity is here, keel spare 5 is U type light gauge steel, just keel spare 5's opening direction court the setting of ceramic tile spare 4 direction, the size of protruding cavity just allows U type light gauge steel to insert.

If the first plate 1 and the second plate 2 are concrete decorative plates, a first connection mode of the keel piece 5 is adopted; conversely, if the first and

second panels

1, 2 are foamed, the second type of connection of the keel members 5 is preferred.

If the second mode, keel spare 5 is after first board 1 finishes with the compound of ceramic tile spare 4, vertically inserts to protruding intracavity, prevents that keel spare 5 from droing after the installation of composite wall panel.

Furthermore, a first screw receiving groove 323 for conveniently hiding a screw head of the first screw 321 is arranged on one side of the fixing plate 32 away from the connecting plate 31; a second screw receiving groove 324 for conveniently hiding a screw head of the second screw 322 is provided at a side of the fixing plate 32 adjacent to the connecting plate 31. The screw heads of the first screws 321 are positioned on the side of the fixing plate 32 far away from the first plate 1, so that the first screw containing grooves 323 are formed in the fixing plate 32, and the screw heads of the first screws 321 are prevented from abutting against the wall to damage the wall when the fixing plate 32 is connected with the wall; similarly, the screw head of the second screw 322 is located on the side of the fixing plate 32 away from the wall, that is, on the side of the fixing plate 32 close to the second plate 2, and then the second screw-receiving groove 324 is provided on the fixing plate 32, so that the damage to the second plate 2 caused by the screw head of the second screw 322 abutting against the side of the second plate 2 when the second plate 2 is mounted on the connecting portion 3 can be effectively avoided.

Certainly, the first clamping piece 12 and the second clamping piece 22 are both elastic pieces formed integrally, the first limiting piece 122 and the second limiting piece 222 in the first clamping piece 12 and the second clamping piece 22 are mainly elastic pieces, and in addition, the surfaces of the first clamping piece 12 and the second clamping piece 22 are coated with waterproof coatings, so that when water leakage can be effectively prevented, rainwater permeates into one side of the first clamping piece 12 and the second clamping piece 2 close to the wall body from the space between the first clamping piece 1 and the second clamping piece 2, and the integrity and the waterproofness of the wall board are ensured.

Finally, the connecting portion 3 is an integrally formed aluminum alloy member, that is, the connecting portion 3 is an i-shaped member when leaving the factory, and the first nail accommodating groove 323 and the second nail accommodating groove 324 are also formed when leaving the factory.

The present invention is not limited to the above-described specific embodiments, and various modifications and variations are possible. Any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a shingle nail butt joint structure suitable for ceramic tile composite wall board which characterized in that: comprising a first plate (1), a second plate (2) and a connecting part (3) for connecting the first plate (1) and the second plate (2), one end of the first plate (1) close to the second plate (2) is provided with a first groove (11), one end of the second plate (2) close to the first plate (1) is provided with a second groove (21), a first clamping piece (12) is arranged in the first groove (11), a second clamping piece (22) is arranged in the second groove (21), the connecting part (3) comprises a connecting plate (31), a fixing plate (32) and a backing plate (33) for connecting the connecting plate (31) and the fixing plate (32), one end of the connecting plate (31) is at least partially positioned in the first clamping piece (12), at least one part of one end of the connecting plate (31) far away from the first clamping piece (12) is positioned in the second clamping piece (22).

2. A shingle flush joint construction suitable for use in a ceramic tile composite wall panel in accordance with claim 1 wherein: the first clamping piece (12) is provided with first clamping grooves (121) which are opened towards the connecting plate (31), notches of the first clamping grooves (121) are provided with first limiting blocks (122), the number of the first limiting blocks (122) is two, and the distance between the two first limiting blocks (122) is smaller than the thickness of the connecting plate (31); the second clamping piece (22) is provided with a second clamping groove (221) which is opened towards the connecting plate (31), a second limiting block (222) is arranged on a notch of the second clamping groove (221), the number of the second limiting blocks (222) is two, and the distance between the two second limiting blocks (222) is smaller than the thickness of the connecting plate (31).

3. A shingle flush joint construction suitable for use in a ceramic tile composite wall panel in accordance with claim 1 wherein: the first groove (11) and the second groove (21) are both strip-shaped grooves; a first transverse groove (111) extending along the thickness direction of the first plate (1) is formed in the inner side of the first groove (11), and at least one part of the first clamping piece (12) is positioned in the first transverse groove (111); a second transverse groove (211) extending along the thickness direction of the second plate (2) is formed in the second groove (21), and at least one part of the second clamping piece (22) is located in the second transverse groove (211).

4. A shingle flush joint construction suitable for use in a ceramic tile composite wall panel in accordance with claim 1 wherein: the connecting plate (31) with fixed plate (32) parallel arrangement, the one end of backing plate (33) with connecting plate (31) are close to the middle part of one side of fixed plate (32) is connected, the other end of backing plate (33) with fixed plate (32) are close to the middle part of one side of connected plate (31) is connected.

5. A shingle flush joint construction suitable for use in a ceramic tile composite wall panel as defined in claim 4 wherein: one end of the fixing plate (32) is provided with a first screw (321) used for connecting the first plate (1), and the other end of the fixing plate (32) is provided with a second screw (322) used for connecting a wall body.

6. A shingle flush joint construction suitable for use in a ceramic tile composite wall panel as defined in claim 5 wherein: a first screw containing groove (323) used for conveniently hiding a screw head of the first screw (321) is formed in one side, away from the connecting plate (31), of the fixing plate (32); one side of the fixing plate (32) close to the connecting plate (31) is provided with a second screw containing groove (324) for conveniently hiding the screw head of the second screw (322).

7. A shingle flush joint construction suitable for use in a ceramic tile composite wall panel in accordance with claim 1 wherein: the first clamping piece (12) and the second clamping piece (22) are both integrally formed elastic pieces.

8. A shingle flush joint construction suitable for use in a ceramic tile composite wall panel in accordance with claim 1 wherein: the surfaces of the first clamping piece (12) and the second clamping piece (22) are coated with waterproof coatings.

9. A shingle flush joint construction suitable for use in a ceramic tile composite wall panel in accordance with claim 1 wherein: the connecting part (3) is an integrally formed aluminum alloy part.

10. A shingle flush joint construction suitable for use in a ceramic tile composite wall panel in accordance with claim 1 wherein: first board (1) and second board (2) side all are provided with ceramic tile spare (4), first board (1) and second board (2) are kept away from one side of ceramic tile spare (4) all is provided with keel spare (5).