Inner hollow type occupying structure single body and bottom occupying structure body composed of inner hollow type occupying structure single body

Abstract

The utility model discloses a hollow occupying structure single body and a bottom occupying structure body composed of the hollow occupying structure single body. In order to solve the problem that a fixed structure layer on the top surface of an underground basement or a building roof exists and is difficult to dismantle, so that the transformation difficulty is high, and the transformation construction process is difficult to advance, the hollow type space occupying structure comprises a plurality of hollow type space occupying structure single bodies which are sequentially arranged in the length direction and / or the width direction of the building roof to form a rectangular space occupying structure body; the top plate is arranged above the bottom plate, the at least three self-locking lifting rod pieces are arranged between the bottom plate and the top plate, the lower supporting seat is fixedly connected to the bottom plate, the lower end of the main rod body is arranged in the lower supporting seat in a penetrating mode, and the main rod body is hinged to the bottom face of the top plate through the upper hinge joint; the four edges of each top plate are connecting edges, and the connecting edge of each top plate is connected with the top plate of another adjacent hollow occupying structure single body; and the top surfaces of the plurality of top plates in the plurality of hollow occupying structure monomers form a multi-plate body spliced convex-concave surface of the rectangular occupying structure body.

Description

Technical Field

[0001] The utility model particularly relates to an inner hollow type place-occupying structure monomer and a bottom-mounted place-occupying structure composed of the monomer and belongs to the technical field of construction. Background Art

[0002] The structural structure of the underground basement or roof of a building includes a leveling layer, a thermal insulation and waterproof layer, and a slope adjustment layer. Whether it is to arrange a landscape garden on the underground basement or to build a landscape garden on the roof of the building, a corresponding covering layer needs to be laid. The thickness of the covering layer mostly ranges from 200 mm to 2 meters, and the covering layer must be dense. After its implementation, uneven stacking due to the shape requirements or excessive thickness of the covering layer will cause a large load on the underground basement top or roof of the original building. If the corresponding accurate calculation and design are not performed before laying the covering layer, it will cause great hidden dangers to the safety of the underground basement top or roof of the building. It is also one of the important causes of the collapse of the underground basement top or roof of the building after the renovation. As a result, the underground basement or roof of the building with a fixed structural layer cannot have the performance of laying a thicker covering layer. The renovation has limitations. Due to the existence of the fixed structural layer on the underground basement top or roof of the building and the difficulty of dismantling it, the renovation is difficult and the renovation construction process is difficult to advance. Utility Model Content

[0003] In order to overcome the defects of the prior art, a hollow-type place-occupying structure monomer and a bottom-place-occupying structure composed thereof are provided to solve the above problems.

[0004] A single body of internal hollow place-occupying structure comprises a bottom plate, a top plate and at least three self-locking lifting rods, wherein the bottom plate is arranged horizontally, the top plate is arranged above the bottom plate, and the at least three self-locking lifting rods are arranged between the bottom plate and the top plate, and the self-locking lifting rod comprises a lower support seat, a main rod body, an upper hinge joint and two blocks, wherein the lower support seat is fixedly connected to the bottom plate, the lower end of the main rod body is passed through the lower support seat, the lower end of the main rod body is fixedly connected to two blocks, and the two blocks are respectively detachably connected to the lower support seat, and the upper end of the main rod body is provided with an upper hinge joint, and the main rod body is hinged to the bottom surface of the top plate through the upper hinge joint.

[0005] As a preferred solution: the lower support seat includes two clamping plates, which are arranged vertically in parallel. A clamping gap that matches the lower end of the main rod body is formed between the two clamping plates. The lower end of each clamping plate is fixedly connected to the base plate. The clamping plates and the clamping blocks are arranged in one-to-one correspondence. Each clamping plate is processed with multiple long holes from top to bottom. The length direction of each long hole is in the same direction as the length direction of the clamping plate. When the lower end of the main rod body falls to the predetermined position in the clamping gap, the main rod body drives each clamping block to be inserted into a long hole in its corresponding clamping plate body through horizontal rotation.

[0006] As a preferred solution: the lower support seat is a U-shaped seat body, and the lower support seat also includes a long strip connecting plate, which is horizontally arranged on the top surface of the base plate, and two clamping plates are vertically arranged in parallel on both sides of the top surface of the long strip connecting plate, and the lower end of each clamping plate is fixedly connected to the base plate through the long strip connecting plate.

[0007] As a preferred solution: a first spherical joint is provided at the lower end of the main rod body, and two of the clamping blocks are fixedly connected to the outer spherical surface of the first spherical joint, and the central axes of the two clamping blocks in the length direction are on the same radial line of the first spherical joint. One end of each clamping block is fixedly connected to the outer spherical surface of the first spherical joint, and the other end of each clamping block is a plug-in end that cooperates with a long hole close to it.

[0008] As a preferred solution: a spherical socket hinged to the upper hinged head is processed on the bottom surface of the top plate.

[0009] As a preferred solution: the number of self-locking lifting rods is 3 to 6.

[0010] A bottom-mounted placeholder structure, comprising a plurality of the above-mentioned hollow placeholder structure monomers, wherein the plurality of hollow placeholder structure monomers are sequentially arranged along the length direction and / or width direction of the building roof to form a rectangular placeholder structure;

[0011] Each inner hollow place-occupying structure monomer includes a bottom plate, a top plate and at least three self-locking lifting rods, the bottom plate and the top plate are square plates of equal size, the bottom plate is arranged horizontally, the top plate is arranged above the bottom plate, and at least three self-locking lifting rods are arranged between the bottom plate and the top plate, the self-locking lifting rod includes a lower support seat, a main rod body, an upper hinge head and two clamping blocks, the lower support seat is fixedly connected to the bottom plate, the lower end of the main rod body is passed through the lower support seat, the lower end of the main rod body is fixedly connected to two clamping blocks, and the two clamping blocks are respectively detachably connected to the lower support seat, and the upper end of the main rod body is provided with an upper hinge head, and the main rod body is hinged to the bottom surface of the top plate through the upper hinge head;

[0012] The four edges of each top plate are connecting edges, and the connecting edge of each top plate is connected to the top plate of another adjacent hollow place-occupying structure unit;

[0013] The top surfaces of the plurality of top plates in the plurality of hollow-inner place-occupying structural units form a multi-plate spliced ​​convex-concave surface of a rectangular place-occupying structure.

[0014] As a preferred solution, the connecting edge of each top plate is fixedly connected or detachably connected to the top plate of another adjacent hollow place-occupying structure unit.

[0015] As a preferred solution: the top plate is processed with multiple through holes along the plate thickness direction.

[0016] The beneficial effects of the present invention are:

[0017] The utility model forms a self-lifting and adjustable assembled structural cushion layer suitable for the roof of a building or the top surface of an underground basement through the mutual cooperation between the bottom plate, the top plate and at least three self-locking lifting rods, which can not only facilitate the formation of a secondary lightweight space-occupying structural form during the transformation process, but also facilitate the formation of a basic surface shape of a convex and concave top surface, and facilitate the reduction of the thickness of the covering soil layer and the accumulation of soil layers of different positions and thicknesses due to the adjustment of the shape, thereby improving the uniformity and lightness of the post-structure during the transformation process, and can also ensure the normal drainage performance of the top surface of the underground basement or the building roof, reduce the load on the top surface of the underground basement or the building roof after the transformation, and facilitate maintaining the transformed building in a safe and durable use state.

[0018] The utility model is a hollow lightweight structure, and can also realize the lifting and lowering adjustment of multiple positions of its own structure. A plurality of inner hollow place-occupying structural units are arranged in sequence along the length direction and / or width direction of the building roof to form a rectangular place-occupying structure, thereby ensuring the layout quality of the building roof landscape garden landscape, reducing the difficulty of operating the structural cushion layer and the difficulty of bearing the additional load during the renovation process, and at the same time, during the renovation process, it can also ensure that the top surface of the underground basement or the building roof is in normal drainage performance, avoiding excessive accumulation of rainwater causing damage to the building roof and infiltration into the room. During the arrangement process, the tops of the plurality of inner hollow place-occupying structural units form uneven slopes, which reduces the thickness of the covering layer while also reducing the load of the overall structure on the building roof, improving the uniformity of the structural layout, and avoiding the occurrence of roof collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of a hollow placeholder structure monomer;

[0020] Figure 2 Schematic diagram of the top view of the first form of the hollow placeholder structure monomer;

[0021] Figure 3 A schematic cross-sectional view of the connection between the top plate and the self-locking lifting rod;

[0022] Figure 4 Schematic diagram of the three-dimensional structure of the clamping plate;

[0023] Figure 5 It is a schematic diagram of the main structure of the self-locking lifting rod;

[0024] Figure 6 Schematic diagram of the three-dimensional structure of the self-locking lifting rod;

[0025] Figure 7Schematic diagram of the top view of the second form of the hollow placeholder structure monomer;

[0026] Figure 8 This is a schematic diagram of the main structure of the utility model;

[0027] Figure 9 This is a schematic diagram of the first form of the three-dimensional structure of the internal hollow placeholder structure monomer;

[0028] Figure 10 Schematic diagram of the second three-dimensional structure of the hollow placeholder structure monomer;

[0029] Figure 11 Schematic diagram of the third form of the three-dimensional structure of the hollow placeholder structure monomer;

[0030] Figure 12 Schematic diagram of the top plate structure from a top view.

[0031] In the figure: 1-bottom plate; 2-top plate; 3-self-locking lifting rod; 4-lower support seat; 4-1-clamping plate; 4-2-clamping gap; 4-3-long hole; 4-4-long strip connecting plate; 5-main rod; 6-upper hinge joint; 7-block; 8-spherical socket; 9-through hole; 10-first spherical joint; 11-first circular hole; 12-second circular hole. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0033] Specific implementation method 1: Combination Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 12Describe this embodiment. This embodiment includes a base plate 1, a top plate 2 and at least three self-locking lifting rods 3. The base plate 1 is arranged horizontally, the top plate 2 is arranged above the base plate 1, and at least three self-locking lifting rods 3 are arranged between the base plate 1 and the top plate 2. The self-locking lifting rod 3 includes a lower support seat 4, a main rod body 5, an upper hinge head 6 and two blocks 7. The lower support seat 4 is fixedly connected to the base plate 1, and the lower end of the main rod body 5 is passed through the lower support seat 4. The lower end of the main rod body 5 is fixedly connected to two blocks 7, and the two blocks 7 are respectively detachably connected to the lower support seat 4. The upper end of the main rod body 5 is provided with an upper hinge head 6, and the main rod body 5 is hinged to the bottom surface of the top plate 2 through the upper hinge head 6.

[0034] Furthermore, by adjusting the position of the block 7 on the lower support seat 4, the top plate 2 is placed in an inclined state, thereby ensuring that when arranging the landscape garden, it can not only lift the building roof to form a lightweight cushion layer, but also realize the convex and concave shape of the top surface. The specific shape of the convex and concave shape is laid according to the specific requirements of the landscape garden, and it can also assist in drainage, ensuring that the building roof is in a normal drainage use state.

[0035] Specifically, the main rod body 5 is hinged to the bottom surface of the top plate 2 through the upper hinge joint 6, thereby ensuring that it can be easily adjusted during use to avoid being restricted during use. It can form a slope form that meets the requirements, improve the uniformity of the covering layer at each position, avoid forming a shape through the accumulation of covering soil, and avoid the collapse of the top surface due to the accumulation of covering soil.

[0036] Specific embodiment 2: This embodiment is a further limitation of specific embodiment 1. In this embodiment, the lower support seat 4 includes two clamping plates 4-1, and the two clamping plates 4-1 are arranged vertically in parallel. A clamping gap 4-2 that matches the lower end of the main rod body 5 is formed between the two clamping plates 4-1. The lower end of each clamping plate body 4-1 is fixedly connected to the base plate 1. The clamping plates 4-1 and the clamping blocks 7 are arranged in a one-to-one correspondence. Each clamping plate body 4-1 is sequentially processed with a plurality of long holes 4-3 from top to bottom. The length direction of each long hole 4-3 is in the same direction as the length direction of the clamping plate body 4-1. When the lower end of the main rod body 5 falls to the predetermined position in the clamping gap 4-2, the main rod body 5 drives each clamping block 7 to be inserted into a long hole 4-3 in its corresponding clamping plate body 4-1 through horizontal rotation.

[0037] Furthermore, the main rod body 5 drives each block 7 to be installed on the clamping plate body 4-1 through horizontal rotation, which is convenient for disassembly and installation. The long hole 4-3 processed on the clamping plate body 4-1 not only facilitates the adjustment of the main rod body 5, but also facilitates the normal use of the drainage system on the top surface of the building.

[0038] Furthermore, the clamping plate body 4-1 can also appear in a second form. The clamping plate body 4-1 is processed with multiple first circular holes 11 along its plate thickness direction. The direction of the multiple first circular holes 11 is the same as the length direction of the main rod body 5. The main rod body 5 is clamped in the first circular hole 11 by adjusting the block 7, thereby ensuring that the upper hinge head 6 of the main rod body 5 makes the top plate 2 present an inclined state.

[0039] Specific embodiment three: This embodiment is a further limitation of specific embodiment one or two. In this embodiment, the lower support seat 4 is a U-shaped seat body, and the lower support seat 4 also includes a long strip connecting plate 4-4, which is horizontally arranged on the top surface of the base plate 1, and two clamping plate bodies 4-1 are vertically arranged in parallel on both sides of the top surface of the long strip connecting plate 4-4. The lower end of each clamping plate body 4-1 is fixedly connected to the base plate 1 through the long strip connecting plate 4-4.

[0040] Furthermore, each clamping plate 4-1 is fixed to the base plate 1 through a long strip connecting plate 4-4, ensuring stability and firmness during use, so that the landscape garden is both beautiful and light when arranged.

[0041] Furthermore, each clamping plate body 4-1 is processed with multiple second circular holes 12 along the thickness direction of the plate, and the main rod body 5 is inserted into the second circular hole 12 at any corresponding position through the block 7, thereby ensuring that the top plate 2 is in an inclined state at a predetermined angle, which is conducive to reducing the laying thickness of the covering layer and improving the laying uniformity of the covering layer. During the use of the building roof, drainage is carried out through the second circular holes 12, thereby avoiding obstruction of the drainage system and the occurrence of water seepage and leakage.

[0042] Specific embodiment four: This embodiment is a further limitation of specific embodiments one, two or three. In this embodiment, a first spherical joint 10 is provided at the lower end of the main rod body 5, and two of the clamping blocks 7 are fixedly connected to the outer spherical surface of the first spherical joint 10, and the central axes of the two clamping blocks 7 in the length direction are on the same radial line of the first spherical joint 10. One end of each clamping block 7 is fixedly connected to the outer spherical surface of the first spherical joint 10, and the other end of each clamping block 7 is a plug-in end that cooperates with a long hole 4-3 close to it.

[0043] Furthermore, the first spherical joint 10 ensures that the main rod body 5 can perform horizontal self-rotation when it is inserted into the two clamping plates 4-1, and drives the clamping block 7 to be smoothly inserted into the long hole 4-3 while rotating.

[0044] Specific embodiment five: This embodiment is a further limitation of specific embodiments one, two, three or four. In this embodiment, a spherical socket 8 hinged to the upper hinge head 6 is processed on the bottom surface of the top plate 2 .

[0045] Furthermore, to ensure that the top plate 2 can flexibly achieve different slopes on the main rod body 5, a spherical socket 8 hinged to the upper hinge head 6 is processed on the bottom surface of the top plate 2. The cooperation between the upper hinge head 6 and the spherical socket 8 can facilitate the formation of the convex and concave shapes of the top surface, thereby avoiding the accumulation of soil in the covering layer during use, thereby collapsing the top surface of the building.

[0046] Specific embodiment six: This embodiment is a further limitation of specific embodiments one, two, three or four. In this embodiment, the number of self-locking lifting rods 3 is 3 to 6.

[0047] Furthermore, by adjusting the clamping block 7 , each self-locking lifting rod 3 can present a different height trend, ensuring that the top plate 2 can present different slopes.

[0048] Specific implementation method seven: combination Figures 1 to 12 This embodiment includes a plurality of hollow-type place-occupying structural units, which are sequentially arranged along the length direction and / or width direction of the building roof to form a rectangular place-occupying structure.

[0049] Each inner hollow place-occupying structure monomer includes a bottom plate 1, a top plate 2 and at least three self-locking lifting rods 3. The bottom plate 1 and the top plate 2 are equal-sized square plates. The bottom plate 1 is arranged horizontally, and the top plate 2 is arranged above the bottom plate 1. At least three self-locking lifting rods 3 are arranged between the bottom plate 1 and the top plate 2. The self-locking lifting rod 3 includes a lower support seat 4, a main rod body 5, an upper hinge head 6 and two blocks 7. The lower support seat 4 is fixedly connected to the bottom plate 1, and the lower end of the main rod body 5 is passed through the lower support seat 4. The lower end of the main rod body 5 is fixedly connected to two blocks 7, and the two blocks 7 are respectively detachably connected to the lower support seat 4. The upper end of the main rod body 5 is provided with an upper hinge head 6, and the main rod body 5 is hinged to the bottom surface of the top plate 2 through the upper hinge head 6;

[0050] The four edges of each top plate 2 are connecting edges, and the connecting edge of each top plate 2 is connected to the top plate 2 of another adjacent hollow place-occupying structure unit;

[0051] The top surfaces of the multiple top plates 2 in the multiple hollow-type place-occupying structural units form a multi-plate spliced ​​convex-concave surface of a rectangular place-occupying structure.

[0052] Furthermore, during use, it is ensured that multiple internal hollow place-occupying structural monomers can present the basic surface shape of convex and concave shapes when assembled. By adjusting the position of the block 7 on the main rod body 5 in the lower support seat 4, each top plate 2 is in a corresponding tilted state. When the first top plate 2 is in a downward process, one end of the second top plate and one end of the first top plate 2 are at the same height. Therefore, when the internal hollow place-occupying structural monomers are connected, the top plates 2 are abutted against each other to form convex and concave surfaces of corresponding shapes. After the convex and concave surfaces of corresponding shapes are formed, it is only necessary to weld and fix the edges that are tightly attached to each other between the top plates 2.

[0053] Specific embodiment eight: This embodiment is a further limitation of specific embodiment seven. In this embodiment, the connecting edge of each top plate 2 is fixedly connected or detachably connected to the top plate 2 of another adjacent hollow place-occupying structure unit.

[0054] Furthermore, the connecting edge of each top plate 2 is connected to the top plate 2 of another adjacent hollow place-occupying structure unit by dovetail joints, so that the connection can be fixed and detached, ensuring that separation is avoided during use.

[0055] Specific embodiment 9: This embodiment is a further limitation of specific embodiment 7 or 8. In this embodiment, the top plate 2 is processed with multiple through holes 9 along the plate thickness direction.

[0056] Furthermore, the top plate 2 is processed with a plurality of through holes 9, which is conducive to normal drainage function during use, forming a fast and effective drainage method.

[0057] Four self-locking lifting rods 3 are correspondingly configured in the inner hollow place-occupying structure monomer. Each self-locking lifting rod 3 is located at an end corner of the top plate 2. The lifting and lowering adjustment process of the inner hollow place-occupying structure monomer is as follows:

[0058] According to the requirements of the renovation design, the number of inner hollow place-occupying structural units is configured accordingly, and multiple inner hollow place-occupying structural units are arranged along the length and width directions of the building roof to form a matrix structure. Each inner hollow place-occupying structural unit is adjusted, and the four self-locking lifting rods 3 in each inner hollow place-occupying structural unit are adjusted respectively until the top plate 2 of the inner hollow place-occupying structural unit is in a predetermined tilted or horizontal posture. The adjustment process of each self-locking lifting rod 3 is as follows:

[0059] Insert one end of the self-locking lifting rod 3 with the block 7 into the clamping gap 4-2, and drive the block 7 to rotate by rotating the main rod body 5 until the block 7 extends into the long hole 4-3 at the corresponding position on the lower support seat 4, and finally spot weld the adjacent edges of the two top plates 2 in the two adjacent inner hollow placeholder structure monomers. Similarly, arrange other inner hollow placeholder structure monomers and weld and fix the position of the top plate 2 after the posture is adjusted. Multiple inner hollow placeholder structure monomers are arranged in sequence to form a bottom placeholder structure.

[0060] The layout process of the bottom-placed structure in conjunction with the building roof renovation to form a landscape garden is as follows:

[0061] After multiple internal hollow place-occupying structural units are arranged on the roof of the building according to the above-mentioned installation process, the self-locking lifting rod 3 of each internal hollow place-occupying structural unit is adjusted and installed according to the predetermined design requirements, and then rotated to drive its corresponding card block 7 to extend into the corresponding long hole 4-3, so that the corresponding top plate 2 on it presents different inclinations. After the edges of the top plate 2 are welded to form a multi-plate spliced ​​convex and concave surface, it is ensured that each top plate 2 has drainage performance (ensuring that the drainage performance of each position of the entire roof is uniform and smooth). At the same time, it can also provide a paving position for the covering layer, and the covering layer can be paved and landscape items can be arranged according to the predetermined design requirements.

Claims

1. A hollow space-occupying structure monomer, characterized in that: It includes a bottom plate (1), a top plate (2) and at least three self-locking lifting rods (3). The bottom plate (1) is horizontally arranged, the top plate (2) is arranged above the bottom plate (1), and at least three self-locking lifting rods (3) are arranged between the bottom plate (1) and the top plate (2). The self-locking lifting rod (3) includes a lower support seat (4), a main rod body (5), an upper hinge joint (6) and two clamping blocks (7). The lower support seat (4) is fixedly connected to the bottom plate (1). The lower end of the main rod body (5) is inserted into the lower support seat (4). Two clamping blocks (7) are fixedly connected to the lower end of the main rod body (5). The two clamping blocks (7) are respectively detachably connected to the lower support seat (4). The upper end of the main rod body (5) is provided with an upper hinge joint (6). The main rod body (5) is hinged to the bottom surface of the top plate (2) through the upper hinge joint (6).

2. The hollow space-occupying structure monomer according to claim 1, characterized in that: The lower support seat (4) includes two clamping plate bodies (4-1). The two clamping plate bodies (4-1) are vertically arranged side by side. A clamping gap (4-2) matching the lower end of the main rod body (5) is formed between the two clamping plate bodies (4-1). The lower end of each clamping plate body (4-1) is fixedly connected to the bottom plate (1). The clamping plate bodies (4-1) are arranged corresponding to the clamping blocks (7) one by one. Each clamping plate body (4-1) is successively processed with a plurality of long holes (4-3) from top to bottom. The length direction of each long hole (4-3) is the same as the length direction of the clamping plate body (4-1). When the lower end of the main rod body (5) drops to a predetermined position in the clamping gap (4-2), the main rod body (5) drives each clamping block (7) to insert into one of the long holes (4-3) in its corresponding clamping plate body (4-1) through a horizontal rotation movement.

3. The hollow space-occupying structure monomer according to claim 2, characterized in that: The lower support seat (4) is a U-shaped seat body. The lower support seat (4) further includes a long strip connecting plate (4-4). The long strip connecting plate (4-4) is horizontally arranged on the top surface of the bottom plate (1). The two clamping plate bodies (4-1) are vertically arranged side by side on both sides of the top surface of the long strip connecting plate (4-4). The lower end of each clamping plate body (4-1) is fixedly connected to the bottom plate (1) through the long strip connecting plate (4-4).

4. The hollow space-occupying structure monomer according to claim 2 or 3, characterized in that: A first spherical joint (10) is arranged at the lower end of the main rod body (5). Two clamping blocks (7) are respectively fixedly connected to the outer spherical surface of the first spherical joint (10). The central axes in the length direction of the two clamping blocks (7) are on the same radial line of the first spherical joint (10). One end of each clamping block (7) is fixedly connected to the outer spherical surface of the first spherical joint (10). The other end of each clamping block (7) is a plug-in end matching one of the long holes (4-3) close to it.

5. The hollow space-occupying structure monomer according to claim 1, characterized in that: A spherical socket (8) hinged to the upper hinge joint (6) is processed on the bottom surface of the top plate (2).

6. The hollow space-occupying structure monomer according to claim 1, 2, 3 or 5, characterized in that: The value number of the self-locking lifting rods (3) is 3 to 6.

7. A bottom-mounted placeholder structure, comprising the hollow-type placeholder structure monomer of claim 1, 2, 3, 4, 5 or 6, characterized in that: It includes a plurality of hollow placeholder structure monomers. The plurality of hollow placeholder structure monomers are arranged in sequence along the length direction and / or width direction of the building roof to form a rectangular placeholder structure body; Each internal hollow type place-occupying structure monomer comprises a bottom plate (1), a top plate (2) and at least three self-locking lifting rods (3), the bottom plate (1) and the top plate (2) being equal-sized square plates, the bottom plate (1) being arranged horizontally, the top plate (2) being arranged above the bottom plate (1), and at least three self-locking lifting rods (3) being arranged between the bottom plate (1) and the top plate (2), the self-locking lifting rods (3) comprising a lower support seat (4), a main rod body (5), an upper hinge joint (6) and two clamping blocks (7), the lower support seat (4) being fixedly connected to the bottom plate (1), and the lower end of the main rod body (5) being passed through the lower support seat ( 4), the lower end of the main rod body (5) is fixedly connected to two clamping blocks (7), and the two clamping blocks (7) are detachably connected to the lower support seat (4), and the upper end of the main rod body (5) is provided with an upper hinge joint (6), and the main rod body (5) is hinged to the bottom surface of the top plate (2) through the upper hinge joint (6); the four edges of each top plate (2) are connecting edges, and the connecting edge of each top plate (2) is connected to the top plate (2) of another adjacent inner hollow place-occupying structure monomer; the top surfaces of multiple top plates (2) in multiple inner hollow place-occupying structure monomers form a multi-plate splicing convex and concave surface of a rectangular place-occupying structure.

8. The bottom placeholder structure according to claim 7, characterized in that: The connection edge of each top plate (2) is fixedly connected or detachably connected to the top plate (2) of another adjacent hollow-type place-occupying structural unit.

9. A bottom placeholder structure according to claim 7 or 8, characterized in that: The top plate (2) is machined with a plurality of through holes (9) along the plate thickness direction.

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