A ceiling device for interior decoration projects of public buildings

Abstract

This invention relates to the field of building technology, and in particular to a ceiling device for interior decoration projects in public buildings. It includes symmetrically arranged outwardly extending chamfered structures on both sides of the lower part of a secondary keel, forming a buffer opening between the chamfered structures. When the chamfered structures are subjected to upward pressure from the sheet material, they deform and close, reducing the size of the buffer opening. This allows the side of the sheet material to slide along the outside of the chamfered structure and onto the chamfered structure. After the pressure is released, the buffer opening returns to its original shape, thereby achieving rapid engagement and fixation between the sheet material and the secondary keel. This invention, through the buffer opening and chamfered structures at the lower part of the secondary keel, allows the sheet material to be directly fastened to the secondary keel using a lifting device, eliminating the need for manual alignment or bolt tightening. Simultaneously, the lower opening of the clamp is sealed by edge compression after the sheet material is installed, enhancing the connection stability between the secondary keel and the connector.

Description

Technical Field

[0001] This invention relates to the field of building technology, and in particular to a suspended ceiling device for interior decoration projects in public buildings. Background Technology

[0002] In existing building ceiling structures, a system consisting of a main keel, secondary keels, and decorative panels is typically used for installation. The specific construction process is as follows: first, the main keel is fixed to the building's top structure; then, secondary keels are installed below it to form a supporting framework; finally, the panels (such as energy-saving building materials like foamed concrete insulation boards) are fixed to the lower surface of the secondary keels using clips or bolts, completing the ceiling installation. This installation method is widely used in public buildings, especially in places with high requirements for building energy efficiency, such as hospitals, schools, and office buildings. Among these, foamed concrete insulation boards are widely used due to their lightweight, high strength, and excellent thermal insulation properties.

[0003] However, existing technologies present numerous inconveniences in actual construction. Due to the large interior spaces of public buildings, the individual panels used for thermal insulation and energy conservation are generally large. Traditional installation methods require multiple people to work together to lift them to the level of the secondary joists, manually adjust their position, and then secure them with clips or bolts. This process is cumbersome and labor-intensive. Even with lifting equipment to assist in raising the panels to the installation height, manual alignment, clipping, and tightening are still necessary, which is not only inefficient but also poses certain safety hazards. Therefore, there is an urgent need for an improved ceiling device for interior decoration projects in public buildings, allowing the panels to be directly fastened to the secondary joists via a lifting device, eliminating the need for manual alignment and tightening. This would enable fast, safe, and efficient installation, improving overall construction efficiency and project quality. Summary of the Invention

[0004] Therefore, the technical problem this invention aims to solve is as follows: Due to the large interior spaces of public buildings, the individual areas of the thermal insulation and energy-saving panels used are generally large. Traditional installation methods require multiple people to work together to lift them to the level of the secondary joists, manually adjust their positions, and then fix them with clips or bolts. This process is cumbersome and labor-intensive. Even when using lifting equipment to assist in raising the panels to the installation height, additional manual operations such as alignment, clamping, or tightening are still required, which is not only inefficient but also poses certain safety hazards.

[0005] The above-mentioned technical problems are solved by the following technical solution: This invention proposes a ceiling device for interior decoration engineering of public buildings, comprising:

[0006] The main keel is fixedly installed below the building ceiling via the main hanger;

[0007] The secondary keel is detachably installed below the main keel via connectors;

[0008] The sheet material is snapped between two adjacent secondary keels;

[0009] The lower part of the secondary keel is provided with outwardly extending chamfered structures on both sides, and a buffer opening is formed between the two chamfered structures;

[0010] When the chamfered structure is subjected to upward pressure from the plate, it deforms and closes, and the buffer opening shrinks, allowing the side of the plate to slide along the outside of the chamfered structure and onto the chamfered structure. After the pressure of the buffer opening is released, it returns to its original shape, thereby achieving quick engagement and fixation between the plate and the secondary keel.

[0011] In a preferred embodiment of the ceiling device for interior decoration of public buildings according to the present invention: the cross-section of the secondary keel is symmetrical, including a first side and a second side, the first side and the second side being respectively connected to the two sides of the first horizontal plate at the top;

[0012] Both the first side and the second side include a first vertical plate, a second horizontal plate and a second vertical plate arranged sequentially in the vertical direction, and the first horizontal plate, the first vertical plate, the second horizontal plate and the second vertical plate together constitute the upper half structure of the secondary keel;

[0013] The first vertical plate is vertically connected to the lower surface of the first horizontal plate; the second horizontal plate extends horizontally inward and is vertically connected to the first vertical plate; the second vertical plate is connected to the lower end of the second horizontal plate and extends vertically downward therefrom.

[0014] In a preferred embodiment of the ceiling device for interior decoration engineering of public buildings according to the present invention: a first inclined surface that slopes outward is provided at the lower end of the second vertical plate, a horizontal surface is connected to the lower end of the first inclined surface, a second inclined surface that slopes inward is provided on the lower surface of the horizontal surface, and a third inclined surface that slopes upward is connected to the lower end of the second inclined surface.

[0015] Both the first and third inclined surfaces are connected to the outer and inner sides of the lower surface of the second vertical plate;

[0016] The first inclined surface, the horizontal surface, the second inclined surface, and the third inclined surface together constitute the chamfered structure for snapping the end of the plate.

[0017] In a preferred embodiment of the ceiling device for interior decoration engineering of public buildings according to the present invention: an expansion member for filling or enhancing its structural performance is provided inside the secondary keel, and the expansion member is inserted upward into the secondary keel from the lower end opening;

[0018] The upper part of the secondary keel is provided with a through hole, through which the expansion component is positioned and installed.

[0019] In a preferred embodiment of the ceiling device for interior decoration engineering of public buildings according to the present invention: the expansion member comprises three parts connected at the top, middle and bottom:

[0020] The upper part is an oblong structure that fits into the through hole. The width of the oblong structure is less than the narrowest distance in the transverse direction inside the secondary keel, and its length is greater than that distance, so as to achieve transverse positioning limit.

[0021] The middle section is a cylindrical connecting segment;

[0022] The lower part is a frustum-shaped structure, and its outer wall fits into the third inclined surface in the chamfered structure, which is used to form a support with the lower chamfered structure of the secondary keel.

[0023] In a preferred embodiment of the ceiling device for interior decoration engineering of public buildings according to the present invention: a plurality of expansion members are provided on one of the secondary keels;

[0024] The connector and the expansion member correspond at least one-to-one, and the number of expansion members may be greater than the number of connectors.

[0025] In a preferred embodiment of the ceiling device for interior decoration engineering of public buildings according to the present invention: the connector includes a screw rod screwed to the bottom of the main keel;

[0026] A clamp is provided below the screw, the clamp being divided into an upper opening and a lower opening, wherein the nut of the screw is engaged in the upper opening, and the lower opening clamps the upper half of the secondary keel.

[0027] In a preferred embodiment of the ceiling device for interior decoration engineering of public buildings according to the present invention: the lower opening is provided with an inwardly extending hook, which is hooked below the second horizontal plate of the secondary keel, the lower surface of the elongated oval structure of the expansion member is lower than the lower surface of the second horizontal plate, and the hook is hooked on the lower surface of the elongated oval structure.

[0028] In a preferred embodiment of the ceiling device for interior decoration of public buildings according to the present invention: the lower surface of the edge of the board is placed on the horizontal surface of the chamfered structure;

[0029] The side of the edge of the plate abuts against the outer wall of the lower opening of the clamp.

[0030] In a preferred embodiment of the ceiling device for interior decoration engineering of public buildings according to the present invention: the board is a foamed concrete insulation board or other lightweight energy-saving building materials, and the board can be directly fastened to the chamfered structure of the secondary keel by a lifting device.

[0031] The beneficial effects of this invention are as follows: The buffer opening and chamfered structure at the lower part of the secondary keel allow the panels to be directly fastened to the secondary keel using a lifting device, eliminating the need for manual alignment or bolt tightening, significantly improving installation efficiency. Simultaneously, the lower opening of the clamp is sealed by edge compression after panel installation, enhancing the connection stability between the secondary keel and the connector, avoiding the risk of detachment due to vibration or external force. The expansion component further enhances the overall load-bearing capacity of the secondary keel; its elongated oval structure, combined with the through hole, provides limiting, and its frustum-shaped structure fits tightly with the buffer opening of the secondary keel, effectively preventing structural loosening caused by opening contraction under the combined action of the panel's weight and the expansion component's tension. Furthermore, the modular design of the main keel, secondary keel, connector, and expansion component facilitates disassembly and replacement, aiding in later maintenance and local adjustments. This device has a reasonable structure and is easy to operate, suitable for interior decoration projects in large-space public buildings such as hospitals, schools, shopping malls, and office buildings, and is especially suitable for construction scenarios requiring rapid, efficient, and safe installation using lightweight, energy-saving panels such as foamed concrete. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein:

[0033] Figure 1 This is a schematic diagram of the overall appearance of the present invention;

[0034] Figure 2 This is a partial structural schematic diagram of the present invention;

[0035] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0036] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0037] Figure 5 for Figure 4 Schematic diagram of the middle section Figure 1 ;

[0038] Figure 6 for Figure 4 Schematic diagram of the middle section Figure 2 .

[0039] In the picture:

[0040] 1. Main keel; 11. Main hanger; 2. Secondary keel; 21. First side; 22. Second side; 23. First horizontal plate; 24. Chamfered structure; 241. First inclined surface; 242. Horizontal surface; 243. Second inclined surface; 244. Third inclined surface; 25. Upper structure; 251. First vertical plate; 252. Second horizontal plate; 253. Second vertical plate; 254. Through hole; 26. Buffer opening; 3. Plate; 4. Connector; 41. Screw; 42. Clamp; 43. Upper opening; 44. Lower opening; 45. Hook; 5. Expansion piece; 51. Oblong structure; 52. Cylindrical connecting section; 53. Frustum-shaped structure. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0042] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0043] Reference Figures 1-6 This embodiment provides a suspended ceiling device for interior decoration projects in public buildings. The device includes a main keel 1, secondary keels 2, and panels 3. The main keel 1 is fixedly installed below the building ceiling via main hangers 11, forming the top support framework of the entire suspended ceiling system. Below the main keel 1, secondary keels 2 are detachably installed via connectors 4. Multiple secondary keels 2 are arranged in parallel to form the basic framework for installing the panels 3. The panels 3 are then snapped between adjacent secondary keels 2 to complete the laying of the suspended ceiling surface.

[0044] Furthermore, the lower sides of the secondary keel 2 are symmetrically provided with outwardly extending chamfered structures 24, and a buffer opening 26 with a certain elasticity is formed between the two chamfered structures 24. The chamfered structure 24 is preferably made of a metal or plastic material with a certain elasticity, so that it can undergo elastic deformation when subjected to external pressure.

[0045] When installing the board 3, first place the board 3 on the lifting equipment and adjust it above the installation area. Then start the lifting equipment and slowly lift the board 3 below the secondary keel 2. At this time, the edge of the board 3 contacts the lower end of the chamfered structure 24. During the continuous upward movement, an inward pressure is exerted on the chamfered structure 24, causing the buffer opening 26 to gradually close, allowing the edge of the board 3 to slide along the outside of the chamfered structure 24 and cross the structure. When the board 3 continues to rise and separates from the chamfered structure 24, the chamfered structure 24 returns to its original shape due to its own elasticity, and the lower surface of the edge of the board 3 then falls on the bearing surface of the chamfered structure 24, achieving stable clamping.

[0046] This structural design enables the board 3 to be directly buckled onto the secondary keel 2 through the lifting equipment, eliminating the need for manual alignment or bolt fastening, significantly improving the construction efficiency. At the same time, the cooperation between the chamfered structure 24 and the edge of the board 3 enhances the stability and safety of the connection, meeting the large-area installation requirements of lightweight energy-saving boards 3 such as foam concrete.

[0047] Refer to Figures 2-6 , in the ceiling device of the present invention, the secondary keel 2 is made of a metal or plastic material with certain elasticity and bearing capacity. Its cross-section is a left-right symmetric structure, including a first side part 21 and a second side part 22. The two parts are respectively fixedly connected to both sides of the first horizontal plate 23 at the top, forming a complete skeleton structure. The first side part 21 and the second side part 22 both include an upper half structure 25 and a lower half chamfered structure 24, and a buffer opening 26 is formed between the lower halves of the first side part 21 and the second side part 22.

[0048] Each side part is formed by sequentially connecting multiple structural members: The first vertical plate 251 is vertically arranged on the lower surface of the first horizontal plate 23 and serves as the main supporting component of the upper part structure of the secondary keel 2; the second horizontal plate 252 extends horizontally inward from the middle of the first vertical plate 251 and is perpendicularly connected to it, playing a role of lateral limiting and support; the second vertical plate 253 is then vertically connected to the lower end of the second horizontal plate 252 and continues to extend to the bottom area of the secondary keel 2, constituting the structural basis of the lower half of the secondary keel 2. The above-mentioned first horizontal plate 23, first vertical plate 251, second horizontal plate 252, and second vertical plate 253 together form the upper half structure 25 of the secondary keel 2, providing a stable support platform for the subsequent clamping by the connecting member 4 and installation of the expanding member 5. The upper half structures 25 of the first side part 21 and the second side part 22 are combined to form an inverted "convex" shape, only lacking the horizontal bar at the upper end of the convex shape, forming an opening. Such a setting enables the upper half structure 25 to have a large upper end and a small lower end, facilitating its being clamped and held by the lower opening cavity 44 of the clamp 42, and also ensuring the firmness of the installation of the secondary keel 2.

[0049] Furthermore, a first inclined surface 241 with an outward slope is provided at the lower end of the second vertical plate 253. The lower end of the first inclined surface 241 is connected to a horizontally extending cross surface 242. The lower surface of the cross surface 242 has a second inclined surface 243 with an inward slope, and its lower end is connected to a third inclined surface 244 with an upward slope. The first inclined surface 241 and the third inclined surface 244 are located on the outer and inner sides of the lower end of the second vertical plate 253, respectively. The four together form a chamfered structure 24 with elastic deformation capability. The first inclined surface 241 is used to guide the plate 3 to slide down onto the cross surface 242, or to compress the plate 3 when it falls onto it, causing the buffer opening 26 to contract inward and further compress the internal expansion member 5. The cross surface 242 is used for placing the edge of the plate 3 and for mounting and receiving the plate 3. The second inclined surface 243 is used to compress and guide the plate 3 to move upward onto the chamfered structure 24 when the plate 3 is installed from bottom to top, while compressing the buffer opening 26. The two third inclined surfaces 244 of the first side 21 and the second side 22 form an "eight" shape, which facilitates the expansion member 5's truncated cone to squeeze it outward to expand the buffer opening 26 and lock the entire secondary keel 2.

[0050] The chamfered structure 24 described above deforms and retracts inward when subjected to upward pressure from the plate 3, allowing the edge of the plate 3 to slide smoothly through this area. When the pressure is released, the chamfered structure 24 returns to its original shape, and the lower surface of the edge of the plate 3 is then constrained on the transverse surface 242, thus achieving a quick and stable snap-fit ​​connection. This structural design eliminates the need for additional bolts or clips, significantly improving the installation efficiency of the plate 3, and is particularly suitable for large-area applications of lightweight energy-saving plates 3 such as foamed concrete.

[0051] In the ceiling device of this invention, in order to further enhance the load-bearing capacity and structural stability of the secondary keel 2, an expansion member 5 is provided inside the secondary keel 2 to fill or enhance its structural performance. This expansion member 5 is preferably made of engineering plastic or metal with a certain degree of rigidity and elasticity to meet the stress requirements during long-term use.

[0052] The expansion component 5 is inserted upward from the buffer opening 26 at the bottom of the secondary keel 2 and enters the interior of the secondary keel 2 in a vertical direction. A through hole 254 is provided at the upper part of the secondary keel 2. The upper structure of the expansion component 5 is adapted to be inserted into the through hole 254 to achieve lateral limiting and axial fixation, thereby completing the accurate positioning and installation of the expansion component 5.

[0053] In a preferred embodiment, multiple expansion members 5 can be provided on a secondary keel 2, with each expansion member 5 spaced apart along the length of the secondary keel 2. A one-to-one correspondence can be maintained between the expansion members 5 and the connecting members 4. Additional expansion members 5 can also be added at locations without connecting members 4 as needed to enhance local load-bearing capacity or improve the overall structural rigidity.

[0054] After the sheet metal 3 is secured to the chamfered structure 24 of the secondary keel 2 by the lifting device, the weight of the sheet metal 3 is transmitted downwards through the secondary keel 2. Meanwhile, the expansion member 5, due to its upper part being limited by the through hole 254 and its lower part inserted into the buffer opening 26, experiences an upward pulling force. The two forces interact, causing the lower structure of the expansion member 5 to fit tightly against the buffer opening 26 area of ​​the secondary keel 2, effectively preventing the sheet metal 3 from falling off due to the contraction of the buffer opening 26. Furthermore, the expansion member 5 also serves to seal the buffer opening 26 to a certain extent, preventing cables and other components located inside the buffer opening 26 from falling out, thus securing the cables.

[0055] The expansion component 5 comprises three connected parts: the upper part is an oblong structure 51, which is adapted to be inserted into the through hole 254. The width of the oblong structure 51 is less than the distance at the narrowest point of the transverse direction inside the secondary keel 2, and its length is greater than the distance to achieve transverse positioning limit; the middle part is a cylindrical connecting section 52; and the lower part is a frustum-shaped structure 53, whose outer wall fits against the third inclined surface 244 in the chamfered structure 24 to form a matching support with the lower chamfered structure 24 of the secondary keel 2.

[0056] In the ceiling device of this invention, the expansion member 5 is preferably made of integrally molded engineering plastic or metal, and has a three-section structure: the upper part is an oblong structure 51, which is adapted to be inserted into the through hole 254 at the top of the secondary keel 2 to achieve lateral positioning. The width of the oblong structure 51 is less than the narrowest distance at the inside of the secondary keel 2, while the length is greater than the distance, so that it can be horizontally locked after insertion to prevent it from falling off; the middle part is a cylindrical connecting section 52, which is used to connect the upper and lower parts of the structure and ensure that the overall force is evenly distributed; the lower part is a frustum-shaped structure 53, the shape of which matches the third inclined surface 244 in the chamfered structure 24 at the lower end of the secondary keel 2, so that it can fit tightly after being inserted into place to form a stable supporting contact surface.

[0057] During installation, the expansion member 5 is inserted upwards from the buffer opening 26 at the bottom of the secondary keel 2 and enters the interior of the secondary keel 2 vertically. When its upper elongated structure 51 reaches the through hole 254, it is rotated 90 degrees to make it horizontally inserted into the through hole 254, completing the limiting installation. Further, the clamp 42 in the connector 4 has an inwardly extending hook 45 structure in the lower opening 44. This hook 45 hooks onto the lower part of the second horizontal plate 252 of the secondary keel 2, and can also hook onto the lower surface of the elongated structure 51 of the expansion member 5. Since the cylindrical connecting section 52 of the expansion member 5 is shorter than the length of the second vertical plate 253 of the secondary keel 2, the lower surface of its elongated structure 51 is lower than the lower surface of the second horizontal plate 252, thus ensuring that the hook 45 can stably hook onto this part. After the plate 3 is installed, the weight of the plate 3 will exert a downward pulling force through the secondary keel 2, while the expansion member 5, limited by the through hole 254 and pulled by the hook 45, will generate an upward pulling force. The two forces act in opposite directions, causing the frustum-shaped structure 53 of the expansion piece 5 to fit more tightly into the buffer opening 26 area of ​​the secondary keel 2, effectively preventing the risk of the plate 3 loosening or falling off due to the shrinkage of the buffer opening 26.

[0058] In the ceiling device of this invention, after the panel 3 is lifted by the lifting device to the space between two adjacent secondary joists 2, its two side edges respectively contact and press against the chamfered structure 24 at the lower end of the secondary joist 2. The chamfered structure 24 contracts inward under pressure, allowing the edge of the panel 3 to slide smoothly into the area above it. When the pressure is released, the chamfered structure 24 returns to its original shape, and the lower surface of the edge of the panel 3 is restricted on the horizontal surface 242 of the chamfered structure 24, thereby achieving stable support. In addition, as the panel 3 continues to rise into place, the side of its edge will also contact the outer wall of the lower opening 44 of the clamp 42 of the connector 4, and apply a certain lateral compressive force to it. This compressive force enhances the connection stability between the panel 3 and the secondary joist 2 on the one hand, and also causes the lower opening 44 of the clamp 42 to close further, forming a clamping effect on the upper half structure 25 of the secondary joist 2, preventing loosening caused by vibration or external force. This double-limiting design, where the edge of the panel 3 is supported by the chamfered structure 24 and abuts against the outer wall of the clamp 42, not only improves the structural stability of the overall ceiling system, but also effectively avoids the tilting or falling off of the panel 3 during long-term use, thus providing good safety and practicality.

[0059] In the ceiling device of this invention, the board 3 is preferably a foamed concrete insulation board or other lightweight energy-saving building materials with similar properties. This type of board 3 not only has good heat insulation and sound insulation properties, but is also lightweight, easy to transport and install, and is particularly suitable for interior decoration projects in large-space public buildings such as hospitals, schools, and shopping malls. During actual construction, the board 3 is lifted to the area to be installed using a lifting device and adjusted between two adjacent secondary joists 2. Then, the operator starts the lifting device, causing the board 3 to rise slowly, with its two edges contacting and pressing against the chamfered structure 24 at the lower end of the secondary joist 2. Because the chamfered structure 24 has a certain elasticity, it contracts inward under pressure, allowing the edges of the board 3 to slide into the area above it. When the board 3 continues to rise and detaches from the chamfered structure 24, the chamfered structure 24 returns to its original shape, and the lower surface of the edge of the board 3 falls onto the bearing surface of the chamfered structure 24, completing a stable connection. The entire installation process does not require manual alignment or bolt tightening, significantly improving construction efficiency and avoiding safety hazards caused by working at height. In addition, due to the light weight of the board 3, combined with the elastic snap-fit ​​mechanism of the chamfered structure 24 of the secondary keel 2, it can effectively prevent loosening or falling off after installation, ensuring the long-term stability and safety of the ceiling system.

[0060] Reference Figures 1-6 This invention provides a ceiling device suitable for interior decoration projects in public buildings. Its installation process includes four main stages: installation of the main keel 1, installation of the secondary keel 2, installation of the panels 3, and installation of the expansion components 5. This installation method is simple to operate and structurally stable, making it particularly suitable for large-space public building scenarios using lightweight, energy-saving insulating panels 3 such as foamed concrete.

[0061] Main keel 1 installation: Multiple main hangers 11 are pre-installed on the ceiling according to the design spacing. The main keel 1 is fixed to the lower end of each main hanger 11 with nuts to complete the overall frame of the main keel 1. After all the main keels 1 are installed, they should be kept level to ensure the accuracy of subsequent component installation.

[0062] Installation of connector 4: The upper end of the screw 41 of connector 4 is screwed to the lower part of the main keel 1. The lower end of the screw 41 slides into the side of the upper opening 43 of the clamp 42 and is locked therein. The upper opening 43 limits the head of the screw 41 to prevent it from falling off, thus completing the installation and positioning of all connectors 4 and the main keel 1.

[0063] Secondary keel 2 installation: The upper half structure 25 of the secondary keel 2 is lifted upward from the bottom of the lower opening 44 of the clamp 42. The lower opening 44 automatically opens under pressure, allowing the secondary keel 2 to be inserted. After the pressure is released, the lower opening 44 springs back and closes, thus clamping and fixing the secondary keel 2. After the secondary keel 2 is inserted into place, the second horizontal plate 252 of the upper half of the secondary keel 2 is hooked by the hook 45 of the lower opening 44 of the clamp 42, forming a preliminary support. Repeat the above steps to complete the installation of all secondary keels 2 in sequence, forming a complete ceiling support frame.

[0064] Installation of Panel 3: Place panel 3 (such as foamed concrete insulation board) on the lifting equipment tray. Move the lifting equipment above the area to be installed, adjust its position so that panel 3 is roughly aligned with the gap between two adjacent secondary joists 2, start the lifting equipment, and slowly lift panel 3 to the installation height. The two edges of panel 3 contact and press against the chamfered structure 24 (third inclined surface 244) at the lower end of the secondary joist 2. After being pressed, the chamfered structure 24 contracts inward, and the buffer opening 26 shrinks. Panel 3 continues to rise and passes over the chamfered structure 24. After releasing the pressure, the chamfered structure 24 returns to its original position, and the lower surface of the edge of panel 3 falls onto the horizontal surface 242 of the chamfered structure 24, completing the engagement. At the same time, the edge of panel 3 applies a squeezing force to the outside of the lower opening 44 of clamp 42 to close it, further enhancing structural stability. Repeat the above actions to complete the installation of all panels 3 one by one.

[0065] Installation of expansion component 5: Align the elongated oval structure 51 of expansion component 5 with the through hole 254 at the top of the secondary keel 2 and insert it vertically. The width of the elongated oval structure 51 is smaller than the narrowest point of the secondary keel 2 in the lateral direction, and the length is greater than this distance, so as to facilitate rotation and positioning after insertion. After insertion, rotate expansion component 5 by 90 degrees to fix its elongated oval structure 51 in the lateral direction. Simultaneously insert the frustum-shaped structure 53 at the bottom of expansion component 5 into the buffer opening 26 at the bottom of the secondary keel 2. At this time, the hook 45 in the lower opening 44 of the clamp 42 hooks onto the lower surface of the elongated oval structure 51 of expansion component 5. Expansion component 5 moves upward under the action of tension, while the plate 3 moves downward under the action of gravity, which drives the secondary keel 2. The two form opposing forces. Under this action, the frustum-shaped structure 53 of expansion component 5 fits tightly with the buffer opening 26 of the secondary keel 2 to prevent the opening from shrinking and causing the plate 3 to loosen or fall off. Repeat the above steps to install the remaining expansion components 5 in sequence to improve the overall load-bearing capacity and structural stability.

[0066] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A suspended ceiling device for interior decoration projects in public buildings, characterized in that: include: The main keel (1) is fixedly installed below the building ceiling via the main hanger (11); The secondary keel (2) is detachably mounted below the main keel (1) via a connector (4); The plate (3) is snapped between two adjacent secondary keels (2); Among them, the lower part of the secondary keel (2) is symmetrically provided with outwardly extending chamfered structures (24) on both sides, and a buffer opening (26) is formed between the two chamfered structures (24). When the chamfered structure (24) is subjected to upward pressure from the plate (3), it deforms and closes, and the buffer opening (26) shrinks, allowing the side of the plate (3) to slide along the outside of the chamfered structure (24) into the chamfered structure (24). After the pressure of the buffer opening (26) is released, it returns to its original shape, thereby realizing the quick engagement and fixation between the plate (3) and the secondary keel (2). An expansion member (5) for filling or enhancing the structural performance is provided inside the secondary keel (2). The expansion member (5) is inserted upward into the secondary keel (2) from the lower end buffer opening (26). The upper half structure (25) of the secondary keel (2) is provided with a through hole (254). The expansion member (5) is positioned and installed through the through hole (254). The expansion member (5) consists of three parts connected at the top, middle and bottom: the upper part is an oblong structure ( 51), which is adapted to be inserted into the through hole (254), wherein the width of the oblong structure (51) is less than the distance of the narrowest part of the transverse direction inside the secondary keel (2), and its length is greater than the distance, so as to achieve transverse positioning; the middle part is a cylindrical connecting section (52); the lower part is a frustum-shaped structure (53), whose outer wall is in contact with the third inclined surface (244) in the chamfered structure (24), and is used to form a matching support with the lower chamfered structure (24) of the secondary keel (2).

2. The ceiling device for interior decoration of public buildings according to claim 1, characterized in that: The cross-section of the secondary keel (2) is symmetrical, including a first side (21) and a second side (22), the first side (21) and the second side (22) being connected to the two sides of the first horizontal plate (23) at the top respectively; Both the first side (21) and the second side (22) include a first vertical plate (251), a second horizontal plate (252) and a second vertical plate (253) arranged in sequence along the vertical direction. The first horizontal plate (23), the first vertical plate (251), the second horizontal plate (252) and the second vertical plate (253) together constitute the upper half structure (25) of the secondary keel (2). The first vertical plate (251) is vertically connected to the lower surface of the first horizontal plate (23); the second horizontal plate (252) extends horizontally inward and is vertically connected to the first vertical plate (251); the second vertical plate (253) is connected to the lower end of the second horizontal plate (252) and extends vertically downward therefrom.

3. The ceiling device for interior decoration of public buildings according to claim 2, characterized in that: The lower end of the second vertical plate (253) is provided with an outwardly inclined first slope (241), the lower end of the first slope (241) is connected to a horizontal surface (242), the lower surface of the horizontal surface (242) is provided with an inwardly inclined second slope (243), and the lower end of the second slope (243) is connected to an upwardly inclined third slope (244). The first inclined surface (241) and the third inclined surface (244) are both connected to the outer and inner sides of the lower surface of the second vertical plate (253); The first inclined surface (241), the horizontal surface (242), the second inclined surface (243) and the third inclined surface (244) together constitute the chamfer structure (24) for snapping the end of the plate (3).

4. The ceiling device for interior decoration of public buildings according to claim 1, characterized in that: Multiple expansion members (5) are provided on one of the secondary keels (2); The connector (4) corresponds to the expansion member (5) at least one-to-one, and the number of expansion members (5) may be greater than the number of connectors (4).

5. The ceiling device for interior decoration of public buildings according to claim 4, characterized in that: The connector (4) includes a screw (41) screwed below the main keel (1); A clamp (42) is provided below the screw (41). The clamp (42) is divided into an upper opening (43) and a lower opening (44). The nut of the screw (41) is engaged in the upper opening (43), and the lower opening (44) is clamped in the upper half of the secondary keel (2).

6. The ceiling device for interior decoration of public buildings according to claim 5, characterized in that: The lower opening (44) is provided with an inwardly extending hook (45), which hooks (45) below the second horizontal plate (252) of the secondary keel (2). The lower surface of the elongated oval structure (51) of the expansion member (5) is lower than the lower surface of the second horizontal plate (252), and the hook (45) hooks on the lower surface of the elongated oval structure (51).

7. The ceiling device for interior decoration of public buildings according to claim 5 or 6, characterized in that: The lower surface of the edge of the plate (3) is placed on the cross surface (242) of the chamfered structure (24); The side of the edge of the plate (3) abuts against the outer wall of the lower opening (44) of the clamp (42).

8. The ceiling device for interior decoration of public buildings according to any one of claims 1-6, characterized in that: The board (3) is a foamed concrete insulation board or other lightweight energy-saving building material. The board (3) can be directly fastened to the chamfered structure (24) of the secondary keel (2) by a lifting device.

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