CN116816012A - Assembly type wall internal corner mounting piece and mounting method thereof - Google Patents

Abstract

The application provides an assembled wall internal corner mounting piece and a mounting method thereof, and belongs to the technical field of wall internal corner mounting. The assembly type wall internal corner mounting piece and the mounting method thereof comprise a first keel, an internal corner piece, a telescopic piece, a first wallboard and a second wallboard. According to the application, the length of the expansion piece is adjusted according to the installation requirement, so that the distance between the first keel and the wall surface is adjusted, the first keel is leveled, the first connecting plate is connected to the leveled first keel, the female corner piece is arranged at a first preset height on the wall surface, the second connecting plate is abutted to the first wallboard of the two adjacent wallboards, the third connecting plate is connected to the second wallboard positioned at the female corner of the wall surface, the second wallboard is arranged at a second preset height on the wall surface, the second wallboard of the two adjacent wallboards is arranged on the wall surface in a protruding mode, and a concave-convex structure is formed on the wall surface.

Description

Assembly type wall internal corner mounting piece and mounting method thereof

Technical Field

The application relates to the technical field of wall internal corner installation, in particular to an assembled wall internal corner installation piece and an installation method thereof.

Background

The wall decoration is a key area for decoration and fitment of the indoor space of a building, and can protect the wall, enhance the firmness and durability of the wall and prolong the service life of the wall; the wall body can also improve the use functions of the wall body, such as improving the heat preservation, heat insulation and sound insulation capabilities of the wall body, improving the artistic effect of the building and beautifying the environment. The concave-convex shape is required to be arranged on the wall surface, namely one of the two adjacent wallboards is arranged in a protruding mode, but the two adjacent wallboards can only be respectively arranged at a fixed height through connecting pieces in the conventional wall surface installation, and one of the two adjacent wallboards cannot be arranged on the wall surface in a protruding mode.

Chinese patent CN109403575a, publication date 2019-3-1 discloses a wall panel integrated installation assembly and a wall decoration method, the wall panel integrated installation assembly comprising: the wall panels are sequentially arranged along the extending direction of the wall body, and the surfaces of the wall panels are provided with decorative layers; the butt joint device is arranged between two adjacent wall panels and is used for connecting the two adjacent wall panels, and the two wall panels are fixed with the wall body through the butt joint device; the internal corner installation assembly is arranged at a wall internal corner of the wall body, and wall panels positioned at two sides of the wall internal corner are fixed with the wall body through the internal corner installation assembly; the external corner fixing piece is arranged at the external corner of the wall body, and the wall panels positioned at the two sides of the external corner of the wall body are fixed with the wall body through the external corner fixing piece. The application provides a wall panel integrated installation assembly and a wall decoration method, which can realize rapid assembly of a wall panel and a wall body, decorate the wall body and improve the industrialization level. In the above patent, the distance between the butt joint device, the internal corner mounting assembly and the external corner fixing piece and the wall surface is a determined value, so that the wall boards are mounted at the fixed height of the wall surface, and one of the two adjacent wall boards cannot be arranged on the wall surface in a protruding mode.

Disclosure of Invention

The application aims to overcome the defects of the prior art and provide an assembly type wall internal corner mounting piece and a mounting method thereof.

The application provides an assembly type wall internal corner mounting piece, which comprises a first keel, an internal corner piece, a telescopic piece with adjustable length, a first wall plate and a second wall plate which are adjacent to each other; one end of the telescopic piece is connected with the first keel and fixed on the wall surface, and the length of the telescopic piece is adjusted to adjust the distance between the first keel and the wall surface; the reentrant corner piece is including connecting in the first connecting plate of first fossil fragments, be used for the butt in first wallboard in order to the second connecting plate of first wallboard binding off, be used for connecting in the third connecting plate of second wallboard, second connecting plate both ends are connected in first connecting plate and third connecting plate respectively.

Further, the wallboard comprises a first clamping groove, and the third connecting plate is clamped in the first clamping groove.

Further, the first keel comprises a first base plate, a first mounting through hole is formed in the first connecting plate, and the female corner fitting further comprises a first fastening structure, one end of the first fastening structure penetrates through the first mounting through hole and is fixedly connected to the first base plate.

Further, the first keel further comprises two first stop plates symmetrically connected to two side ends of the first base plate, the two first stop plates are oppositely arranged, a first inserting through hole is formed between the two first stop plates, the first connecting plate is abutted to the first stop plates, and one end of the first fastening structure sequentially penetrates through the first mounting through hole, the first inserting through hole and is fixedly connected to the first base plate.

Further, the second installation through hole of bar is equipped with on the first base plate, the extensible member includes expansion pipe, lead screw, fastening nut, expansion pipe fixed connection is in the wall, the expansion pipe inboard is equipped with first internal thread, the lead screw includes the double-screw bolt, connects in the stopper of double-screw bolt one end, double-screw bolt one end passes the second installation through hole and spiro union in first internal thread, fastening nut is in the part that is located first base plate one side on the double-screw bolt when stopper butt in first base plate.

Further, the reentrant corner piece still includes the backup pad that carries out spacing for the second wallboard when third connecting plate joint in first draw-in groove, the backup pad is connected in the part that is located between first connecting plate, the third connecting plate on the second connecting plate.

Further, the female corner fitting is of a Z-shaped structure, the first connecting plate and the third connecting plate are respectively arranged on the second connecting plate at different sides, and the supporting plate and the third connecting plate are arranged on the second connecting plate at the same side.

Further, the female corner piece further comprises a limiting protrusion used for limiting the wallboard when the first clamping groove moves towards the direction close to the third connecting plate, and the limiting protrusion is connected to the third connecting plate.

Further, a first friction groove for increasing friction force is formed in the supporting plate.

The method for installing the assembly type wall internal corner installing piece comprises the following steps:

s1: one end of the telescopic piece is connected with the first keel and fixed on the wall surface, and the length of the telescopic piece is adjusted to adjust the distance between the first keel and the wall surface;

s2: connecting a first connecting plate of the female corner fitting to the first keel, and abutting a second connecting plate of the female corner fitting against a first wallboard of two adjacent wallboards to close the first wallboard;

s3: the third connection plate of the female corner fitting is connected to the second of the two adjacent wall panels.

The assembly type wall internal corner mounting piece and the mounting method thereof have the following beneficial effects:

the extension direction setting of wall reentrant corner department with first fossil fragments along wall one side end, extensible member one end is connected in first fossil fragments and is fixed in on the wall, adjust the length of extensible member according to the installation demand, thereby adjust the distance between first fossil fragments and the wall, accomplish the height of predetermineeing position department on the first fossil fragments, through adjusting a plurality of extensible members, can leveling first fossil fragments, connect first fossil fragments after the leveling, make reentrant corner spare set up the first height department of predetermineeing on the wall, with the first wallboard of second connecting plate butt in two adjacent wallboards with the binding off to first wallboard, connect the second wallboard that is located wall reentrant corner department with the third connecting plate, thereby make the second wallboard set up the second of second wallboard on the wall predetermineeing height department, thereby set up the second wallboard protrusion in two adjacent wallboards on the wall, form the concave-convex structure on the wall, and simple structure installs portably.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application. In the drawings, like reference numerals are used to identify like elements. The drawings, which are included in the description, illustrate some, but not all embodiments of the application. Other figures can be derived from these figures by one of ordinary skill in the art without undue effort.

FIG. 1 is a schematic view of a part of a fabricated wall inside corner fitting and a method for installing the same according to an embodiment of the present application;

FIG. 2 is a schematic view of a fabricated wall inside corner mounting member and a method for mounting the same according to an embodiment of the present application, wherein a first wall plate is not abutted to a second connecting plate;

fig. 3 is a schematic structural view of a first keel in an assembled wall inside corner fitting and a method of installing the same according to an embodiment of the present application;

fig. 4 is a side view of a first keel of a fabricated wall cladding angle fitting and method of installing the same according to an embodiment of the application;

FIG. 5 is a side view of a fabricated wall inside corner fitting and method of installing the same according to an embodiment of the present application;

FIG. 6 is a schematic view of a part of a wall-mounted inside corner fitting and a method for installing the same according to an embodiment of the present application;

FIG. 7 is a schematic view of a first friction groove in a fabricated wall inside corner fitting and a method of installing the same according to an embodiment of the present application;

fig. 8 is an exploded view of a first keel in an assembled wall inside corner fitting and method of installing the same according to an embodiment of the application;

fig. 9 is a schematic structural view of a lead screw in an assembly type wall inside corner mounting member and a mounting method thereof according to an embodiment of the present application.

In the figure: 1-first keels, 11-first base plates, 111-second mounting through holes, 12-first stop plates, 13-first inserting through holes, 2-female corner fittings, 21-first connecting plates, 211-first mounting through holes, 22-limit protrusions, 23-second connecting plates, 24-third connecting plates, 25-first fastening structures, 26-supporting plates, 261-first friction grooves, 3-telescopic parts, 31-screw rods, 311-screw bolts, 312-limit blocks, 32-expansion pipes, 33-reinforcing pipes, 34-gaskets, 4-wallboards and 41-first clamping grooves.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.

Please refer to fig. 1 to 9. The application provides an assembly type wall internal corner mounting piece, which comprises a first keel 1, an internal corner piece 2, a length-adjustable telescopic piece 3, a first wall plate 4 and a second wall plate 4 which are adjacent to each other; one end of the expansion piece 3 is connected with the first keel 1 and fixed on the wall surface, and the length of the expansion piece 3 is adjusted to adjust the distance between the first keel 1 and the wall surface; the female corner fitting 2 comprises a first connecting plate 21 connected to the first keel 1, a second connecting plate 23 for abutting against the first wallboard 4 to close the first wallboard 4, and a third connecting plate 24 for connecting to the second wallboard 4, wherein two ends of the second connecting plate 23 are respectively connected to the first connecting plate 21 and the third connecting plate 24.

The wallboard 4 can include first draw-in groove 41, and third connecting plate 24 joint is in first draw-in groove 41, and it is convenient to install, improves the stability that third connecting plate 24 connects in wallboard 4.

Specifically, the first clamping grooves 41 can be symmetrically arranged at two side ends of the wallboard 4, so that the third connecting plates 24 of the two female corner pieces 2 are respectively clamped with the two first clamping grooves 41 on the wallboard 4, and the stability of the wallboard 4 is improved.

The first keel 1 may include a first base plate 11 with a first mounting through hole 211 formed in the first connection plate 21, and the female corner fitting 2 further includes a first fastening structure 25 having one end penetrating the first mounting through hole 211 and fixedly coupled to the first base plate 11.

Specifically, the first fastening structure 25 may be a screw or a screw, and through observation, the first mounting through hole 211 is aligned with a preset position on the first substrate 11, and then one end of the first fastening structure 25 passes through the first mounting through hole 211 and is fixedly connected to the first substrate 11, so that the first connecting plate 21 and the first substrate 11 are fastened and connected, the connection stability of the first keel 1 and the female corner piece 2 is improved, and the installation is convenient. A plurality of first mounting through holes 211 may be formed in the first connecting plate 21 at equal intervals, so that the first keels 1 may be connected to one female corner fitting 2, and the female corner fitting 2 may be fixed by the first keels 1, so as to improve stability of the female corner fitting 2.

The first keel 1 may further include two first stop plates 12 symmetrically connected to two side ends of the first substrate 11, the two first stop plates 12 are oppositely disposed, a first insertion through hole 13 is disposed between the two first stop plates 12, the first connecting plate 21 abuts against the first stop plate 12, and one end of the first fastening structure 25 sequentially passes through the first mounting through hole 211, the first insertion through hole 13 and is fixedly connected to the first substrate 11.

Specifically, the first stop plate 12 may be a seven-shaped plate, one ends of the two first stop plates 12 are respectively connected to two side ends of the first substrate 11, the two first stop plates 12 are oppositely arranged, a first insertion through hole 13 is formed between the other ends of the two first stop plates 12, the first mounting through hole 211 and the first insertion through hole 13 are aligned through observation, the first connecting plate 21 is parallel to the first substrate 11, the first connecting plate 21 abuts against the first stop plate 12, the first stop plates 12 support the first connecting plate 21, one end of the first fastening structure 25 sequentially passes through the first mounting through hole 211 and the first insertion through hole 13 and is fixedly connected to the first substrate 11, so that the first connecting plate 21 and the first substrate 11 are fastened and connected, the two first stop plates 12 can limit the first fastening structure 25 to the first substrate 11, and the first mounting through hole 211 and the first insertion through hole 13 are aligned through observation, so that the first mounting through hole 211 and the first substrate 11 are aligned at preset positions.

The first substrate 11 can be provided with a second strip-shaped mounting through hole 111, the telescopic piece 3 comprises an expansion pipe 32, a screw rod 31 and a fastening nut, the expansion pipe 32 is fixedly connected to a wall surface, a first internal thread is arranged on the inner side of the expansion pipe 32, the screw rod 31 comprises a stud 311 and a limiting block 312 connected to one end of the stud 311, one end of the stud 311 penetrates through the second mounting through hole 111 and is in threaded connection with the first internal thread, and the fastening nut is in threaded connection with a part of the stud 311, which is located on one side of the first substrate 11, when the limiting block 312 is in butt connection with the first substrate 11.

Specifically, the second mounting through hole 111 is bar-shaped, so that the telescopic member 3 can be conveniently connected to different positions on the first substrate 11 and different positions on the wall surface. The expansion pipe 32 is fixedly connected to the wall surface, one end of the stud 311 sequentially passes through the second mounting through hole 111 and is in threaded connection with the first internal thread, the length of the stud 311 extending into the first internal thread is adjusted, so that the integral length of the expansion piece 3 is adjusted, the distance between the first substrate 11 and the wall surface is adjusted, the distance between the first connecting plate 21 and the wall surface is adjusted, the distance between the third connecting plate 24 and the wall surface is adjusted, the third connecting plate 24 is conveniently clamped and connected to the first clamping groove 41 on the second wall plate 4 which is at a preset distance from the wall surface, the gasket 34 is sleeved on the stud 311 at a part between the limiting block 312 and the first substrate 11, the gasket 34 is in butt connection with the first substrate 11, the limiting block 312 is in butt connection with the gasket 34, and the fastening nut is in threaded connection with the stud 311 at a part which is positioned at one side of the first substrate 11, so that the installation is completed.

The female corner fitting 2 may further include a support plate 26 for limiting the second wall plate 4 when the third connecting plate 24 is clamped in the first clamping groove 41, and the support plate 26 is connected to a portion of the second connecting plate 23 between the first connecting plate 21 and the third connecting plate 24.

Specifically, after the third connecting plate 24 is clamped to the first clamping groove 41 on the second wallboard 4, if an external force impacts the second wallboard 4, the second wallboard 4 moves towards a direction close to the wall surface, the second wallboard 4 drives the third connecting plate 24 to move towards a direction close to the wall surface, the third connecting plate 24 is easily broken, the connection between the female corner fitting 2 and the second wallboard 4 is unstable, the supporting plate 26 is connected to a part, located between the first connecting plate 21 and the third connecting plate 24, of the second connecting plate 23, when the third connecting plate 24 is clamped to the first clamping groove 41, the supporting plate 26 can be abutted to the second wallboard 4, the supporting plate 26 can limit the second wallboard 4, meanwhile, when the external force impacts the second wallboard 4, the second wallboard 4 moves towards a direction close to the wall surface, the supporting plate 26 can absorb shock for the second wallboard 4, the force of the wallboard 4 is reduced, the wallboard 4 is protected, and the stability of the connection between the wallboard 4 and the female corner fitting 2 is improved.

The female corner fitting 2 may have a zigzag structure, wherein the first connecting plate 21 and the third connecting plate 24 are respectively disposed on the second connecting plate 23 on opposite sides, and the supporting plate 26 and the third connecting plate 24 are disposed on the second connecting plate 23 on the same side.

Specifically, the first connecting plate 21 can be vertically connected to the second connecting plate 23, the third connecting plate 24 can be vertically connected to the second connecting plate 23, and since the first wall plate 4 and the second wall plate 4 are disposed on two sides of the second connecting plate 23, the first connecting plate 21 and the third connecting plate 24 need to be disposed on the second connecting plate 23 on different sides respectively, so that the first connecting plate 21 is conveniently connected to the first keel 1 and the third connecting plate 24 is conveniently clamped to the first clamping groove 41, and the installation is convenient.

The female corner fitting 2 may further include a limiting protrusion 22 for limiting the wall plate 4 when the first clamping groove 41 moves toward the third connecting plate 24, and the limiting protrusion 22 is connected to the third connecting plate 24.

Specifically, the third connecting plate 24 is clamped in the first clamping groove 41 of the wallboard 4, and the limiting protrusion 22 limits the wallboard 4, so that the surfaces of the female corner fitting 2 and the wallboard 4 are smoother and more attractive; the second connecting plate 23 closes up the first wallboard 4, so that the first wallboard 4 and the second wallboard 4 form concave-convex shapes on the wall surface, the space is attractive, and the relation between the front and rear layers is achieved.

The supporting plate 26 can be provided with a first friction groove 261 for increasing friction force, the first friction groove 261 is matched with the wallboard 4 for use, the friction force is increased, and sliding of the wallboard 4 during installation is reduced.

The expansion piece 3 may further include a reinforcement tube 33 for increasing strength of the stud 311, where a second internal thread penetrates through the inner side of the reinforcement tube 33, and one end of the stud 311 sequentially penetrates through the second mounting through hole 111, the first mounting through hole 211, is screwed to the second internal thread, and is screwed to the first internal thread.

Specifically, the reinforcement pipe 33 may be a reinforcement metal pipe.

The method for installing the assembly type wall internal corner installing piece comprises the following steps:

s1: one end of the telescopic piece 3 is connected with the first keel 1 and fixed on the wall surface, and the length of the telescopic piece 3 is adjusted to adjust the distance between the first keel 1 and the wall surface;

s2: connecting a first connecting plate 21 of the female corner fitting 2 to the first keel 1, and abutting a second connecting plate 23 of the female corner fitting 2 against a first wall panel 4 of the two adjacent wall panels 4 to close the first wall panel 4;

s3: the third connecting plate 24 of the female corner fitting 2 is connected to the second wall panel 4 of the two adjacent wall panels 4.

The extension direction setting of wall reentrant corner department with first fossil fragments 1 along wall one side end, the length of expansion piece 3 is connected in first fossil fragments 1 and is fixed in on the wall, adjust the length of expansion piece 3 according to the installation demand, thereby adjust the distance between first fossil fragments 1 and the wall, accomplish the height of predetermineeing position department on the first fossil fragments 1, through adjusting a plurality of expansion pieces 3, can leveling first fossil fragments 1, connect first connecting plate 21 in first fossil fragments 1 after the leveling, make the setting of reentrant corner 2 in the first default height department on the wall, with second connecting plate 23 butt in first wallboard 4 in two adjacent wallboards 4 in order to close up first wallboard 4, connect third connecting plate 24 in the second wallboard 4 that is located wall reentrant corner department, thereby make the second wallboard 4 set up the second wallboard 4 in the second default height department on the wall, thereby set up the second wallboard 4 protrusion in two adjacent wallboards 4 on the wall, form concave-convex structure on the wall.

The above description may be implemented alone or in various combinations and these modifications are within the scope of the present application.

It should be noted that, in the description of the present application, the terms "upper end," "lower end," and "bottom end" of the indicated orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship conventionally put in use of the product of the application, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting. Although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. An assembled wall reentrant corner installed part, its characterized in that: comprises a first keel (1), an internal corner piece (2), a length-adjustable telescopic piece (3), a first wallboard (4) and a second wallboard (4) which are adjacent; one end of the telescopic piece (3) is connected with the first keel (1) and fixed on the wall surface, and the length of the telescopic piece (3) is adjusted to adjust the distance between the first keel (1) and the wall surface; the inside corner fitting (2) comprises a first connecting plate (21) connected to the first keel (1), a second connecting plate (23) used for being abutted to the first wallboard (4) to close the first wallboard (4), and a third connecting plate (24) used for being connected to the second wallboard (4), wherein two ends of the second connecting plate (23) are respectively connected to the first connecting plate (21) and the third connecting plate (24).

2. A fabricated wall inside corner mounting according to claim 1, wherein: the wallboard (4) comprises a first clamping groove (41), and the third connecting plate (24) is clamped in the first clamping groove (41).

3. A fabricated wall inside corner mounting according to claim 1 or 2, wherein: the first keel (1) comprises a first base plate (11), a first installation through hole (211) is formed in the first connecting plate (21), and the reentrant corner piece (2) further comprises a first fastening structure (25) of which one end penetrates through the first installation through hole (211) and is fixedly connected to the first base plate (11).

4. A fabricated wall inside corner mounting according to claim 3, wherein: the first keel (1) further comprises two first stop plates (12) symmetrically connected to two side ends of the first base plate (11), the two first stop plates (12) are oppositely arranged, a first inserting through hole (13) is formed between the first stop plates (12), the first connecting plate (21) is abutted to the first stop plates (12), and one end of the first fastening structure (25) sequentially penetrates through the first installing through hole (211), the first inserting through hole (13) and is fixedly connected to the first base plate (11).

5. A fabricated wall inside corner mounting according to claim 3, wherein: the second installation through hole (111) that is equipped with the bar on first base plate (11), extensible member (3) are including expansion pipe (32), lead screw (31), fastening nut, expansion pipe (32) fixed connection is in the wall, expansion pipe (32) inboard is equipped with first internal thread, lead screw (31) include double-screw bolt (311), connect in stopper (312) of double-screw bolt (311) one end, second installation through hole (111) and spiro union are passed in first internal thread to double-screw bolt (311) one end, fastening nut is located the part of first base plate (11) one side on double-screw bolt (311) when stopper (312) butt in first base plate (11).

6. A fabricated wall inside corner mounting according to claim 2, wherein: the internal corner piece (2) further comprises a supporting plate (26) for limiting the second wallboard (4) when the third connecting plate (24) is clamped in the first clamping groove (41), and the supporting plate (26) is connected to the second connecting plate (23) at a part between the first connecting plate (21) and the third connecting plate (24).

7. A fabricated wall inside corner mounting according to claim 6, wherein: the internal corner piece (2) is of a Z-shaped structure, the first connecting plate (21) and the third connecting plate (24) are respectively arranged on the second connecting plate (23) in different sides, and the supporting plate (26) and the third connecting plate (24) are arranged on the second connecting plate (23) in the same side.

8. A fabricated wall inside corner mounting according to claim 6, wherein: the female corner piece (2) further comprises a limiting protrusion (22) used for limiting the wallboard (4) when the first clamping groove (41) moves towards the direction close to the third connecting plate (24), and the limiting protrusion (22) is connected to the third connecting plate (24).

9. A fabricated wall inside corner mounting according to claim 6, wherein: the support plate (26) is provided with a first friction groove (261) for increasing friction force.

10. The method for installing the assembly type wall internal corner installing piece is characterized by comprising the following steps of:

s1: one end of a telescopic piece (3) is connected with the first keel (1) and fixed on the wall surface, and the length of one telescopic piece (3) is adjusted to adjust the distance between the first keel (1) and the wall surface;

s2: connecting a first connecting plate (21) of the female corner fitting (2) to the first keel (1), and abutting a second connecting plate (23) of the female corner fitting (2) against a first wallboard (4) of two adjacent wallboards (4) to close the first wallboard (4);

s3: a third connection plate (24) of the female corner fitting (2) is connected to a second wall plate (4) of the two adjacent wall plates (4).