Splicing zero-gap assembling method for metal grid frame

Abstract

The invention discloses a metal grid frame scattered splicing zero-gap assembling method which comprises the following steps: firstly, fixing a first vertical rod and a second vertical rod according to the drawing requirement in S1, and clamping a specific scattered splicing unit with the vertical rods; s2, further operating the first scattered splicing unit to form an inner-layer grid frame and constructing a middle-layer grid frame; s3, S4, constructing a middle-layer grid frame through connection of different assembling units and related components; s5, the operation is repeated, closing is completed on the last layer according to the S1 and the S2, the corner two-way inserting cores, the edge three-way inserting cores and the middle two-way inserting cores are uniquely designed, all the inserting cores and the vertical rods are fixed through connecting screws, and through a tight assembling method and matched inserting core design, the problem of tight assembling of the inserting core type metal grid frame is successfully solved; zero-gap assembly is achieved, the simulation effect on the Chinese style ancient building wooden grid frame is improved, the craftsmanship degree of the Chinese style ancient building wooden grid frame serving as an artistic building component is enhanced, the requirement of a close splicing seam project is met, and the flexibility and reliability of assembly are further improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal grid frame assembly, and in particular to a method for assembling a metal grid frame in a loose arrangement with zero gaps. Background Art

[0002] As a building structure component, metal grid frames are widely used in modern architectural design. Especially in some venue buildings with unique modeling requirements, it not only plays a role in structural support, but also has an important impact on the appearance and artistic style of the building. For example, in the construction of cultural and art venues, metal grid frames can be designed into various unique shapes and styles to reflect the cultural connotation and artistic characteristics of the building.

[0003] In actual projects, such as the Sichuan Opera Art Center renovation and expansion project in Chengdu, Sichuan Province, a red metal grid frame was designed to imitate the mortise and tenon lattice components of ancient Chinese architecture. The project adopted the unit splicing method to assemble the grid frame in the early design stage. This unit splicing method is to pre-fabricate the metal grid frame into several units, and then splice and combine these units at the construction site to form a complete grid frame structure. The unit splicing method is based on standardized production and on-site construction efficiency considerations to a certain extent. By making the grid frame into units, more precise processing and manufacturing can be carried out in a factory environment, improving production efficiency and product quality. At the same time, unit splicing at the construction site can also reduce the complexity of on-site construction and speed up construction progress.

[0004] However, in non-outdoor and non-large-scale situations where the grid frame has small expansion and contraction deformation, the reserved gap between the horizontal members and the plug-in core of the grid frame after assembly in the unit splicing method is too large. From the perspective of architectural aesthetics, this has a significant negative impact on the simulation effect of the wooden grid frame of ancient Chinese buildings. The mortise and tenon structure of ancient Chinese buildings is famous for its exquisite and tight connection method, and the excessive gap cannot reflect the essence of this traditional craft, which greatly reduces the texture and charm of the metal grid frame in imitating the wooden grid frame.

[0005] In addition, as an artistic building component, too large gaps also reduce its craftsmanship. In some projects with high requirements for architectural art quality, such technical defects are unacceptable, which affects the artistic image and ornamental value of the entire building; and with the development of construction technology and the continuous innovation of architectural design concepts, some projects have put forward the requirement of dense joints for metal grid frames. For example, in the facade decoration or interior space partition of some modern buildings, metal grid frames are required to achieve seamless splicing or splicing with very small gaps to achieve a simple and smooth visual effect. However, the existing unit splicing methods and related processes are unable to meet the precision requirements of these dense joint projects. This not only limits the application of metal grid frames in these specific projects, but also hinders the further development of architectural designers in creativity and design.

[0006] In summary, the existing metal grid frame assembly technology has many problems in practical applications, especially in gap control and meeting the requirements of close assembly. These problems urgently need to be solved through new technical solutions and methods to improve the assembly quality and application scope of the metal grid frame. Summary of the invention

[0007] In order to solve the problem of dense assembly of core-insertion type metal grid frames, the present invention provides a method for assembling metal grid frames in a loose manner with zero gaps, and the dense assembly of metal grid frames is achieved through a close assembly method and core-insertion with optimized design.

[0008] The present invention is achieved through the following technical solutions:

[0009] A method for assembling a metal grid frame without gaps comprises the following steps:

[0010] S1. According to the requirements of the drawings, the first vertical pole and the second vertical pole are fixed on the construction ground at intervals along the positive direction of the Y axis, and the first loose assembly unit consisting of the two-way plug at the corner, the first horizontal rectangular tube and the three-way plug at the edge is moved in the negative direction of the X axis and connected with the first vertical pole and the second vertical pole;

[0011] S2. After connecting one end of the first loose assembly unit along the negative direction of the Y axis in sequence to the second transverse rectangular tube and the two-way plug at the corner, the third vertical rod is inserted into the two-way plug at the corner connected to the negative direction of the Y axis of the first loose assembly unit along the positive direction of the x or y axis to form an inner grid frame, and then the two-way plug at the corner located at the upper end, the three-way plug at the edge located in the middle, and the two-way plug at the corner located at the lower end are connected to the third transverse rectangular tube, the fourth transverse rectangular tube, and the fifth transverse rectangular tube in sequence along one end of the positive direction of the X axis to build a middle grid frame;

[0012] S3. The second scattered assembly unit consisting of the edge three-way ferrule, the first transverse rectangular tube and the middle two-way ferrule is moved in the negative direction of the X axis and connected to the third transverse rectangular tube and the fourth transverse rectangular tube, and then the first vertical rod and the second vertical rod are connected to the two ends of the second scattered assembly unit along the Y axis direction;

[0013] S4. Move the third loose assembly unit composed of the middle two-way plug, the second transverse rectangular tube and the side three-way plug in sequence along the negative direction of the X-axis and connect it to the second vertical pole and the fifth transverse rectangular tube set in step S3, then connect the third vertical pole to the end of the third loose assembly unit along the negative direction of the Y-axis to form a middle-layer grid frame, and then connect the side three-way plug at the upper end, the four-way plug assembly at the middle and the side three-way plug at the lower end along one end of the positive direction of the X-axis to the third transverse rectangular tube, the fourth transverse rectangular tube and the fifth transverse rectangular tube in sequence to build a subsequent middle-layer grid frame;

[0014] S5. Repeat steps S3 and S4 to gradually construct the middle-layer grid frame. When the last layer of grid frame is built, follow steps S1 and S2 to complete the closure.

[0015] As a further technical solution for the zero-gap assembly method of the metal grid frame, the two-way ferrule at the corner includes a first ferrule and a second ferrule, and the first ferrule and the second ferrule are vertically connected to each other to form a first open right-angle cavity for accommodating the first vertical pole.

[0016] As a further technical solution to the method for assembling a metal grid frame in a loose arrangement with zero gaps, both side walls of the first open right-angle cavity are provided with snap-fits extending along the right-angle sides.

[0017] As a further technical solution to the method for assembling a metal grid frame with zero gaps, the edge three-way ferrule includes a third ferrule, a fourth ferrule and a fifth ferrule, and the third ferrule, the fourth ferrule and the fifth ferrule together form an open rectangular cavity for accommodating the first vertical pole.

[0018] As a further technical solution to the method for assembling the metal grid frame in a loose arrangement with zero gaps, the openings of the open rectangular cavities are provided with snap-fits extending outwardly along the wall surface.

[0019] As a further technical solution to the zero-gap assembly method of a metal grid frame, the middle two-way ferrule includes a sixth ferrule and a seventh ferrule, and the sixth ferrule and the seventh ferrule are vertically connected to each other to form a second open right-angle cavity for accommodating the first vertical pole, and one side wall of the second open right-angle cavity is provided with a bayonet extending outward along the wall surface.

[0020] As a further technical solution to the method for assembling a metal grid frame with zero gaps, the distance from the outer end surface of the bayonet to the bottom wall of the open right-angle cavity or the open rectangular cavity is ≥ the width of the transverse rectangular tube.

[0021] As a further technical solution for the metal grid frame zero-gap assembly method, all the inserts and the uprights are fixed by connecting screws;

[0022] The connecting screw comprises a threaded rod and a cross screw head connected to the end of the threaded rod. The length L of the smooth rod on the threaded rod is equal to the width of the vertical rod or less than one time of the thickness of the vertical rod.

[0023] As a further technical solution to the method for assembling a metal grid frame in a loose assembly with zero gaps, in step S4, the middle two-way ferrule in the second loose assembly unit and the middle two-way ferrule in the third loose assembly unit are respectively connected to the diagonal sides of the second vertical pole to form the four-way ferrule assembly.

[0024] As a further technical solution for the method of assembling the metal grid frame in a scattered manner with zero gaps, in step 5, when the last layer of the grid frame is built, the specific construction steps are as follows:

[0025] The first loose-assembled unit, which is composed of the two-way corner ferrule, the first transverse rectangular tube and the three-way side ferrule in sequence, is moved along the negative direction of the X-axis and connected to the third transverse rectangular tube and the fourth transverse rectangular tube on the adjacent middle grid frame; one end of the first loose-assembled unit along the negative direction of the Y-axis is connected to the second transverse rectangular tube and the two-way corner ferrule in sequence; then the first vertical pole, the second vertical pole and the third vertical pole are respectively connected to the two-way corner ferrule at the upper end, the three-way side ferrule in the middle and the two-way corner ferrule at the lower end.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0027] 1. The present invention solves the problem of dense assembly of core-inserted metal grid frames through a tight assembly method and a matching core-inserted design, enables the metal grid frames to be assembled with zero gaps, improves the simulation effect of wooden grid frames of ancient Chinese buildings, enhances the craftsmanship as an artistic building component, and meets the requirements for dense seam projects.

[0028] 2. The different steps of the present invention are specified for the assembly of different components, which can ensure that each component is accurately installed in place and improve assembly flexibility and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0030] Figure 1 This is a schematic diagram of the assembly process of step S1 of the present invention;

[0031] Figure 2 This is a schematic diagram of the state after the assembly of step S1 of the present invention is completed;

[0032] Figure 3 This is a schematic diagram of the assembly process of step S2 of the present invention;

[0033] Figure 4 This is a schematic diagram of the state after the assembly of step S2 of the present invention is completed;

[0034] Figure 5 This is a schematic diagram of the assembly process of step S3 of the present invention;

[0035] Figure 6 This is a schematic diagram of the state after the assembly is completed in step S3 of the present invention;

[0036] Figure 7 This is a schematic diagram of the assembly process of step S4 of the present invention;

[0037] Figure 8 This is a schematic diagram of the state after the assembly is completed in step S4 of the present invention;

[0038] Fig. 9 It is a schematic diagram of the structure of the two-way insert at the corner;

[0039] Fig.10 It is a structural schematic diagram of the edge three-way plug core;

[0040] Fig.11 It is a structural schematic diagram of the middle two-way ferrule;

[0041] Fig.12 Schematic diagram of the structure of the connecting screws.

[0042] Marks and corresponding parts names in the attached drawings:

[0043] 1-first vertical pole, 2-second vertical pole, 3-two-way ferrule at corner, 31-first ferrule, 32-second ferrule, 33-first bayonet, 34-second bayonet, 4-first transverse rectangular tube, 5-three-way ferrule at edge, 51-third ferrule, 52-fourth ferrule, 53-fifth ferrule, 54-third bayonet, 55-fourth bayonet, 6-second transverse rectangular tube, 7-third transverse rectangular tube, 8-fourth transverse rectangular tube, 9-fifth transverse rectangular tube, 10-third vertical pole, 11-two-way ferrule at middle, 111-sixth ferrule, 112-seventh ferrule, 113-fifth bayonet, 12-connecting screw. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0045] Example 1

[0046] This embodiment 1 provides a method for assembling a metal grid frame in a loose manner with zero gaps, comprising the following steps:

[0047] S1: According to the requirements of the drawings, the first vertical pole 1 and the second vertical pole 2 are fixed on the construction ground at intervals along the positive direction of the Y axis, and the first loose assembly unit consisting of the corner two-way plug core 3, the first horizontal rectangular tube 4 and the edge three-way plug core 5 is moved in sequence along the negative direction of the X axis and clamped with the first vertical pole 1 and the second vertical pole 2;

[0048] Among them, see Figure 1-Figure 2 As shown, the two-way ferrule 3 at the corner includes a first ferrule 31 and a second ferrule 32, which are vertically connected to each other to form a first open right-angle cavity for accommodating the first upright pole 1, and the three-way ferrule 5 at the edge includes a third ferrule 51, a fourth ferrule 52 and a fifth ferrule 53, which are enclosed to form an open rectangular cavity for accommodating the second upright pole 2, and the two ends of the first transverse rectangular tube 4 are respectively connected to the first ferrule 31 and the fifth ferrule 53 to form a first loose unit, and the first open right-angle cavity is fixed to the first upright pole 1 by connecting screws 12, and the open rectangular cavity is fixed to the second upright pole 2 by connecting screws 12, and the first loose units are spaced upward in an array along the longitudinal direction of the first upright pole 1 and the second upright pole 2, and the first transverse rectangular tube 4 is finely adjusted, and the screws are screwed in to fix the first loose units of each layer.

[0049] In this embodiment, the ferrule heads of the two-way ferrule 3 at the corner and the three-way ferrule 5 at the edge can be made slightly larger and squeezed and connected with the first transverse rectangular tube 4, eliminating the screws fastened on the transverse rectangular tube, making the grid frame more refined in appearance.

[0050] After the relationship between the rods of each layer is constructed in situ, step S2 is entered: after the end of the first loose assembly unit along the negative direction of the Y axis is connected to the second transverse rectangular tube 6 and the two-way ferrule 3 at the corner in sequence, the third vertical rod 10 is inserted into the two-way ferrule 3 at the corner in the negative direction of the Y axis of the first loose assembly unit along the positive direction of the X or Y axis to form an inner grid frame, and then the two-way ferrule 3 at the corner at the upper end, the three-way ferrule 5 at the edge in the middle, and the two-way ferrule 3 at the corner at the lower end are connected to the third transverse rectangular tube 7, the fourth transverse rectangular tube 8 and the fifth transverse rectangular tube 9 at one end along the positive direction of the X axis in sequence to build a middle grid frame;

[0051] Specifically, see Figure 3 and Figure 4As shown, the third ferrule 51 is then connected in sequence to the second transverse rectangular tube 6 and the two-way corner ferrule 3, and then the third vertical rod 10 is inserted into the first open right-angle cavity formed by the two-way corner ferrule 3 connected to the lower end along the positive direction of the X or Y axis. After fine-tuning the second transverse rectangular tube 6, screws are screwed in to fix the third vertical rod 10 and the first open right-angle cavity to complete the construction of the inner grid frame, and then the two-way corner ferrule 3 at the upper end, the three-way edge ferrule 5 at the middle, and the ferrule heads at one end of the two-way corner ferrule 3 at the lower end are connected in sequence along the positive direction of the X axis to the third transverse rectangular tube 7, the fourth transverse rectangular tube 8, and the fifth transverse rectangular tube 9 to build the middle grid frame.

[0052] After completing the above steps, proceed to step S3: move the second loose assembly unit composed of the edge three-way ferrule 5, the first transverse rectangular tube 4 and the middle two-way ferrule 11 in sequence along the negative direction of the X-axis and connect it to the third transverse rectangular tube 7 and the fourth transverse rectangular tube 8, and then connect the first vertical rod 1 and the second vertical rod 2 at both ends of the second loose assembly unit along the Y-axis direction respectively;

[0053] Specifically, see Figure 5 and Figure 6 As shown, the middle two-way ferrule 11 includes a sixth ferrule 111 and a seventh ferrule 112, which are vertically connected to each other to form a second open right-angle cavity for accommodating the second vertical pole 2. In this step, the two ends of the first transverse rectangular tube 4 are respectively connected to the fourth ferrule 52 of the edge three-way ferrule 5 and the sixth ferrule 111 of the middle two-way ferrule 11 to form a second loose assembly unit, which moves along the negative direction of the X-axis and is connected to the third transverse rectangular tube 7 and the fourth transverse rectangular tube 8, that is, the third ferrule 51 of the edge three-way ferrule 5 is connected to the third transverse rectangular tube 7, and the seventh ferrule 112 of the middle two-way ferrule 11 is connected to the fourth transverse rectangular tube 8; then, the first vertical pole (1) is inserted into the open rectangular cavity formed by the edge three-way ferrule 5 and connected and fixed by the connecting screw 12, and the second vertical pole (2) is inserted into the second open right-angle cavity and connected and fixed by the connecting screw 12.

[0054] After completing the above steps, proceed to step S4: move the third loose assembly unit composed of the middle two-way ferrule 11, the second transverse rectangular tube 4 and the side three-way ferrule 5 in sequence along the negative direction of the X-axis and connect it with the second vertical pole 2 and the fifth transverse rectangular tube 9 set in step S3, and then connect the third vertical pole 10 to the end of the third loose assembly unit along the negative direction of the Y-axis to form a middle-layer grid frame, and then connect the side three-way ferrule 5 at the upper end, the four-way ferrule assembly at the middle and the side three-way ferrule 5 at the lower end along one end of the positive direction of the X-axis to the third transverse rectangular tube 7, the fourth transverse rectangular tube 8 and the fifth transverse rectangular tube 9 in sequence to build a subsequent middle-layer grid frame;

[0055] Specifically, see Figure 7 and Figure 8As shown, in this step, the two ends of the second transverse rectangular tube 4 are respectively connected to the sixth plug core 111 of the middle two-way plug core 11 and the fourth plug core 52 of the edge three-way plug core 5 to form a third loose unit. The second open right-angle cavity formed by the third loose unit moves along the negative direction of the X-axis and is connected to the second vertical pole 2 set in step S3 through the connecting screw 12. At the same time, the open rectangular cavity formed by the third loose unit is inserted into the third vertical pole 10 and connected through the connecting screw 12 to form a middle grid frame.

[0056] In this step, the middle two-way ferrule 11 in the second loose-assembled unit and the middle two-way ferrule 11 in the third loose-assembled unit are respectively connected to the diagonal sides of the second vertical pole 2 to form a four-way ferrule assembly, and then the edge three-way ferrule 5 at the upper end, the four-way ferrule assembly at the middle and the edge three-way ferrule 5 at the lower end are connected to the third transverse rectangular tube 7, the fourth transverse rectangular tube 8 and the fifth transverse rectangular tube 9 in sequence along one end of the positive direction of the X-axis, that is, the fifth ferrule 53 of the edge three-way ferrule 5 at the upper end is connected to the third transverse rectangular tube 7, the seventh ferrule 112 of the middle two-way ferrule 11 located in the middle is connected to the fourth transverse rectangular tube 8, and the third ferrule 51 of the edge three-way ferrule 5 at the lower end is connected to the fifth transverse rectangular tube 9.

[0057] S5. Repeat steps S3 and S4 to gradually construct the middle-layer grid frame. When the last layer of the grid frame is constructed, the first loose unit composed of the two-way corner plug 3, the first transverse rectangular tube 4 and the three-way side plug 5 is moved in the negative direction of the X-axis and connected with the third transverse rectangular tube 7 and the fourth transverse rectangular tube 8 on the adjacent middle-layer grid frame. After one end of the first loose unit in the negative direction of the Y-axis is connected in sequence to the second transverse rectangular tube 6 and the two-way corner plug 3, the first vertical pole 1, the second vertical pole 2 and the third vertical pole 10 are respectively connected to the two-way corner plug 3 at the upper end, the three-way side plug 5 in the middle and the two-way corner plug 3 at the lower end to complete the closure of the metal grid frame.

[0058] Example 2

[0059] This embodiment 2 provides a method for assembling a metal grid frame with zero gaps based on the technical solution of embodiment 1, the difference being that both side walls of the first open right-angle cavity are provided with snap-ons extending along the right-angle sides, the opening of the open rectangular cavity is provided with snap-ons extending outward along the wall surface, and one side wall of the second open right-angle cavity is provided with a snap-on extending outward along the wall surface.

[0060] Specifically, see Figure 9-11As shown, both side walls of the first open right-angle cavity are respectively provided with a first bayonet 33 and a second bayonet 34 extending along the right-angle side, the opening of the open rectangular cavity is respectively provided with a third bayonet 54 and a fourth bayonet 55 extending outward along the wall surface, one side wall of the second open right-angle cavity is provided with a fifth bayonet 113 extending outward along the wall surface, and the distance from the outer end faces of the first bayonet 33 and the second bayonet 34, the third bayonet 54 and the fourth bayonet 55 and the fifth bayonet 113 to the cavity bottom wall is ≥ the width of the horizontal rectangular tube, so that each component can be ensured to be accurately installed in place and the metal grid frame can be closely assembled.

[0061] Meanwhile, in this embodiment, the specifications of the first upright pole 1, the second upright pole 2 and the third upright pole 10 are the same, and as Fig.12 As shown, all the inserts and the vertical poles are fixed by connecting screws 12, and the connecting screws 12 include a threaded rod and a cross screw head connected to the end of the threaded rod. The length L of the smooth rod on the threaded rod is the width of the vertical pole or less than one time the thickness of the vertical pole.

[0062] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for assembling a metal grid frame without gaps, characterized in that: The steps include: S1. According to the requirements of the drawings, the first vertical pole (1) and the second vertical pole (2) are fixed on the construction ground at intervals along the positive direction of the Y axis, and the first loose assembly unit composed of the two-way plug core (3) at the corner, the first horizontal rectangular tube (4) and the three-way plug core (5) at the edge is moved in sequence along the negative direction of the X axis and is clamped with the first vertical pole (1) and the second vertical pole (2); S2. After the first loose assembly unit is connected to the second transverse rectangular tube (6) and the two-way plug core (3) at one end along the negative direction of the Y axis in sequence, the third vertical rod (10) is inserted into the two-way plug core (3) at the corner connected to the negative direction of the Y axis of the first loose assembly unit in the positive direction of the x or y axis to form an inner grid frame, and the two-way plug core (3) at the corner located at the upper end, the three-way plug core (5) at the edge located in the middle, and the two-way plug core (3) at the corner located at the lower end are connected to the third transverse rectangular tube (7), the fourth transverse rectangular tube (8), and the fifth transverse rectangular tube (9) at one end along the positive direction of the x axis in sequence to build a middle grid frame; S3. The second loose assembly unit composed of the three-way plug core (5), the first transverse rectangular tube (4) and the two-way plug core (11) in sequence is moved along the negative direction of the X axis and connected to the third transverse rectangular tube (7) and the fourth transverse rectangular tube (8), and then the first vertical rod (1) and the second vertical rod (2) are respectively connected to the two ends of the second loose assembly unit along the Y axis direction; S4. The third loose assembly unit composed of the middle two-way plug core (11), the second transverse rectangular tube (6) and the side three-way plug core (5) is moved in the negative direction of the X axis and connected to the second vertical pole (2) and the fifth transverse rectangular tube (9) set in step S3, and then the third vertical pole (10) is connected to the end of the third loose assembly unit in the negative direction of the Y axis to form a middle-layer grid frame, and then the side three-way plug core (5) at the upper end, the four-way plug core assembly in the middle and the side three-way plug core (5) at the lower end are connected in sequence along one end of the positive direction of the X axis to the third transverse rectangular tube (7), the fourth transverse rectangular tube (8) and the fifth transverse rectangular tube (9) to build a subsequent middle-layer grid frame; S5. Repeat steps S3 and S4 to gradually construct the middle-layer grid frame. When the last layer of grid frame is built, follow steps S1 and S2 to complete the closure.

2. A method for assembling a metal grid frame without gaps according to claim 1, characterized in that: The corner two-way insert (3) comprises a first insert (31) and a second insert (32), wherein the first insert (31) and the second insert (32) are vertically connected to each other to form a first open right-angle cavity for accommodating the first vertical pole (1).

3. A method for assembling a metal grid frame with zero gaps according to claim 2, characterized in that: Both side walls of the first open right-angle cavity are provided with bayonet holes extending along the right-angle sides.

4. A method for assembling a metal grid frame without gaps according to claim 3, characterized in that: The edge three-way insert (5) comprises a third insert (51), a fourth insert (52) and a fifth insert (53), and the third insert (51), the fourth insert (52) and the fifth insert (53) enclose an open rectangular cavity for accommodating the first vertical pole (1).

5. A method for assembling a metal grid frame without gaps according to claim 4, characterized in that: The openings of the open rectangular cavities are all provided with snap-on openings extending outwards along the wall surfaces.

6. A method for assembling a metal grid frame without gaps according to claim 5, characterized in that: The middle two-way ferrule (11) comprises a sixth ferrule (111) and a seventh ferrule (112), wherein the sixth ferrule (111) and the seventh ferrule (112) are vertically connected to each other to form a second open right-angle cavity for accommodating the first vertical pole (1), and one side wall of the second open right-angle cavity is provided with a bayonet extending outwardly along the wall surface.

7. A method for assembling a metal grid frame without gaps according to claim 6, characterized in that: The distance from the outer end surface of the bayonet to the bottom wall of the open right-angle cavity or the open rectangular cavity is greater than or equal to the width of the transverse rectangular tube.

8. The method for assembling a metal grid frame without gaps according to claim 1, characterized in that: All the plug cores and the vertical poles are fixed by connecting screws (12); The connecting screw (12) comprises a threaded rod and a cross screw head connected to the end of the threaded rod, and the smooth rod length L on the threaded rod is equal to the width of the vertical rod or less than one time the thickness of the vertical rod.

9. A method for assembling a metal grid frame without gaps according to claim 1, characterized in that: In step S4, the middle two-way ferrule (11) in the second loose assembly unit and the middle two-way ferrule (11) in the third loose assembly unit are respectively connected to the diagonal sides of the second vertical pole (2) to form the four-way ferrule assembly.

10. The method for assembling a metal grid frame without gaps according to claim 1, characterized in that: In step 5, when the last layer of grid frame is built, the specific construction steps are as follows: The first loose assembly unit, which is composed of the two-way corner plug core (3), the first transverse rectangular tube (4) and the three-way side plug core (5) in sequence, is moved along the negative direction of the X axis and connected to the third transverse rectangular tube (7) and the fourth transverse rectangular tube (8) on the adjacent middle grid frame. One end of the first loose assembly unit along the negative direction of the Y axis is connected to the second transverse rectangular tube (6) and the two-way corner plug core (3) in sequence. Then, the first vertical rod (1), the second vertical rod (2) and the third vertical rod (10) are respectively connected to the two-way corner plug core (3) at the upper end, the three-way side plug core (5) at the middle and the two-way corner plug core (3) at the lower end.

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