Reinforced concrete laminated slab

Abstract

The invention relates to the technical field of concrete laminated slabs, in particular to a reinforced concrete laminated slab which comprises a prefabricated layer, reinforcing steel bars are fixedly embedded in the prefabricated layer, a pouring layer is fixedly installed on the prefabricated layer, the reinforcing steel bars are embedded in the pouring layer, the prefabricated layer is square, and moving devices are arranged at the four corners of the prefabricated layer. The moving device is used for forming rolling friction between the prefabricated layer and a supporting structure of the prefabricated layer, a locking device is arranged on the prefabricated layer, a fixing claw and a mounting plate are arranged in the locking device, and the mounting plate extrudes the fixing claw so that the moving device can abut against the prefabricated layer. The moving device comprises four mounting grooves formed in the four corners of the prefabricated layer, an L-shaped buckle plate is fixedly mounted on the inner side wall face of each mounting groove, and the L-shaped end of each buckle plate protrudes out of the bottom face of the corresponding mounting groove. According to the invention, the position adjustment difficulty of the laminated slab in the placement process is reduced.

Description

Technical Field

[0001] This invention relates to the field of concrete composite slab technology, specifically a reinforced concrete composite slab. Background Technology

[0002] Reinforced concrete composite slabs are commonly used building components in prefabricated construction methods. For example, patent number CN118148289A, entitled "A Reinforced Concrete Composite Slab and Construction Method," illustrates a type of reinforced concrete composite slab where a complete composite slab structure is formed by pouring concrete on top. When using this type of composite slab, prefabricated reinforced concrete layers, manufactured in a factory, are transported to the construction site and moved to the installation position by a tower crane. The position of the prefabricated reinforced concrete layer is then adjusted by on-site construction workers. Due to the large weight of the prefabricated layer and the planar sliding friction between the prefabricated layer and its underlying supporting structure during adjustment, construction workers often need to use crowbars and considerable force to pry and adjust the position of the prefabricated layer, increasing the construction difficulty.

[0003] Therefore, a reinforced concrete composite slab is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a reinforced concrete composite slab to reduce the difficulty of adjusting the position of the composite slab during installation.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A reinforced concrete composite slab includes a precast layer, in which reinforcing bars are fixedly embedded. A cast-in-place layer is fixedly installed on the precast layer, in which the reinforcing bars are embedded. The precast layer is square, and movable devices are provided at its four corners. A locking device is provided on the precast layer.

[0007] Based on this scheme, the locking device can fix the moving device to the precast layer. Therefore, when the precast layer is repositioned by construction workers using a crowbar, the moving device changes the friction between the precast layer and its supporting structure from sliding friction to rolling friction, reducing friction and making the precast layer easier to move. This facilitates the workers in adjusting the precast layer to the appropriate placement, reducing their workload. Furthermore, once the precast layer is in the correct position, the locking device can be used to detach the moving device from the precast layer. This allows both the moving device and the locking device to be reused in multiple installations of various precast layers, thereby reducing the application cost of this invention.

[0008] In addition, after the moving device and locking device are removed from the precast layer, the pouring layer can fill the gaps caused by the removal of components when it is poured onto the precast layer, thus enabling the building floor slab constructed by the present invention to have good integrity during use.

[0009] Preferably, the moving device includes four mounting slots at the four corners of the prefabricated layer. An L-shaped buckle plate is fixedly installed on the inner wall of each mounting slot, and one end of the L-shape of the buckle plate protrudes from the bottom surface of the mounting slot. A base is provided in the mounting slot, and a receiving groove is provided in the base. A ball bearing is movably installed in the receiving groove. A docking groove is provided on the base to receive the end of the buckle plate that protrudes from the bottom surface of the mounting slot.

[0010] By setting up a moving device, when the precast layer is placed on the corresponding support structure, the bottom surface of the precast layer contacts the support structure, and the bottom end of the ball is level with the bottom surface of the precast layer. On the horizontal plane, the straight lines of the four sides of the precast layer form a rectangle, and the bottom end of the ball is located outside the rectangle.

[0011] In use, the mating groove on the base snaps into the L-shaped buckle plate, and the locking device secures the engagement. When the precast layer is pried open with a pry bar, the torque on the precast layer is transmitted to the base through the engagement of the buckle plate and the mating groove. Thus, when the worker pries up one side of the precast layer with a pry bar, the precast layer rotates around two adjacent ball bearings on the opposite side as fulcrums. At this point, the precast layer temporarily separates from its corresponding support structure, and the ball bearings contact the support structure, generating friction. Therefore, there is no sliding friction between the precast layer and its corresponding support structure; instead, rolling friction occurs between the ball bearings and the support structure, reducing friction and allowing the worker to move the precast layer with less force, thus reducing construction difficulty.

[0012] It is worth noting that, for the rectangular prefabricated layer, a planar coordinate system is constructed on the horizontal plane using the two sides adjacent to the prefabricated layer and the moving device as coordinate axes, and the position of the prefabricated layer is taken as the fourth quadrant. Therefore, the bottom end of the ball bearing should be located in the second quadrant. This ensures that the ball bearings in any two adjacent moving devices can act as fulcrums when the prefabricated layer is pried open with a pry bar, causing the bottom surface of the prefabricated layer to separate from its corresponding support structure. Thus, the ball bearings only need to be arranged at the four corners of the prefabricated layer, which helps reduce the number of moving devices required, thereby reducing the workload during assembly and improving production efficiency.

[0013] In addition, the end of the snap-on panel that protrudes from the bottom of the mounting groove should be located at the top of the snap-on panel, and the top surface of the snap-on panel should be lower than the top surface of the precast layer. This allows for a larger bonding area between the cast-in-place layer and the precast layer when the subsequent pouring of the precast layer is done, thus ensuring a tighter bond between the composite slabs and contributing to the overall structural strength of the composite slabs.

[0014] Preferably, the locking device includes a guide ring disposed on the prefabricated layer, a push rod passing through the guide ring, a grip ring fixedly installed at the top end of the push rod, an mounting plate fixedly installed at the bottom end of the push rod, four mounting holes opened on the mounting plate, four fixing claws rotatably mounted on the guide ring, and the four fixing claws are respectively fixedly connected to four bases; a friction plate is fixedly installed inside the guide ring.

[0015] By incorporating a locking device, when installing the moving device onto the precast layer, the worker first holds the guide ring with one hand and the grip ring with the other. Then, the hand holding the grip ring lifts upwards, causing the push rod to move under the guidance of the guide ring. The mounting plate is also lifted, causing the inner wall of the mounting hole to compress the fixing claws, resulting in the claws opening outwards until the area of ​​the rectangle formed by the four bases as vertices is larger than the rectangular area of ​​the precast layer. At this point, the worker moves the locking device and the moving device together onto the precast layer, aligning the four moving devices with the four corners of the precast layer, and then lowers them so that each moving device falls into its corresponding mounting slot. Then, while keeping the guide ring stationary, the construction worker can push the gripping ring downwards. This causes the push rod to press down on the mounting plate, and the inner wall of the mounting hole squeezes the fixing claws, causing them to retract inwards. Thus, each moving device mounted on the fixing claws is secured into one of the four mounting slots in the precast layer. Simultaneously, the mating slots on the base of the moving device also engage with the mounting plate. Combined with the friction force of the friction pads on the inner side of the guide ring, the push rod maintains its position even after the construction worker releases their hands. Therefore, the moving device is fixed to the precast layer, ensuring a stable position during subsequent movement of the precast layer. This effectively reduces friction and improves the reliability and stability of the invention.

[0016] Furthermore, in this invention, to reduce costs, the moving device is designed to be detachable from the prefabricated layer, allowing the moving device and locking device to be reused during multiple installations across multiple prefabricated layers. However, since the moving device is installed in various corners of the prefabricated layer, the process of disassembling and installing the moving device involves significant mechanical repetition. By incorporating the locking device, when the base of the moving device needs to be disassembled or reassembled, the installation and disassembly of all moving devices can be completed in one go using the locking device, reducing repetitive and mechanically identical labor and thus improving the efficiency of the invention.

[0017] It is worth noting that when the fixing claw retracts with the moving device, the bottom part of the base of the moving device near the buckle plate may interfere with the upper surface of the support structure of the prefabricated layer. As a result, the fixing claw will experience additional resistance and jamming during the movement. To address this, a rounded chamfer can be made on the bottom part of the base near the buckle plate to remove the part that may cause interference, thereby reducing the resistance during use and making the invention easier to operate.

[0018] Building upon this foundation, a permanent magnet can be fixedly installed on the rounded chamfer, positioned below the mating groove and in a location where it will never contact the buckle plate. When the base moves closer to the buckle plate with the moving fixing claw, the permanent magnet will attract the steel buckle plate, pulling the base closer. Because the permanent magnet is below the mating groove, specifically, its magnetic force will cause the mating groove to extend closer to the buckle plate, reducing the difficulty of fastening the buckle plate into the mating groove and making the operation of this invention more convenient. Simultaneously, since the permanent magnet never contacts the buckle plate, and the magnetic attraction is greatly affected by distance, the attraction between the permanent magnet and the buckle plate is limited. Therefore, when the base falls into the mounting groove due to the mutual attraction between the permanent magnet and the buckle plate, the base will not be difficult to move due to excessive attraction. Thus, even if the mating groove fails to accurately align with the buckle plate under the magnet's attraction, the installer can easily fine-tune the base's position, ensuring the mating groove accurately engages with the buckle plate, thereby reducing the operational difficulty of this invention.

[0019] It should be noted that since the rounded chamfer is itself a chamfer on the base, except for the part directly connected to the side of the base, the rest will not directly contact the buckle plate. Therefore, as long as the permanent magnet is installed on the part other than the part directly connected to the side of the base, the permanent magnet will never come into contact with the buckle plate. At the same time, since the fixing claws are fixed to the base, when the fixing claws are open, the base and the rounded chamfer on the base will also flip outward, thus moving the rounded chamfer further away from the buckle plate. Therefore, as the base approaches the buckle plate, the permanent magnet will not come into contact with the buckle plate.

[0020] Preferably, a fixing nut is provided on the guide ring, and the guide ring includes a first half-ring and a second half-ring. A first connecting part and a second connecting part are fixedly installed on the first half-ring and the second half-ring respectively. Both the first connecting part and the second connecting part are provided with connecting threads, which are used to mesh with the threads of the fixing nut. Two fixing claws are installed on each of the first half-ring and the second half-ring.

[0021] In this invention, when construction workers need to push or pull the grip ring to make the fixing claw close or open, due to the presence of the friction plate, the construction workers need to apply a large force to move the grip ring smoothly, which makes the invention still difficult to operate and thus negatively affects the efficiency of the invention.

[0022] With this configuration, the guide ring is divided into two semi-ring parts, which can be fixed together by a fixing nut. The friction plate is also divided into two parts and fixed to each of the two semi-ring parts. Therefore, when the operator needs to move the grip ring, the fixing nut can be unscrewed from the two semi-ring parts in advance, allowing them to separate. This reduces the tightness of the contact between the friction plate and the push rod, decreasing the resistance to the push rod's movement. Consequently, the push rod can move more easily within the guide ring, reducing the operational difficulty of this invention during use.

[0023] Correspondingly, when it is necessary to maintain and fix the position of the push rod, the first half-ring and the second half-ring can be joined together and the push rod can be clamped in the middle. Then, the fixing nut is screwed into the guide ring composed of the first half-ring and the second half-ring. Thus, the friction plate on the inner wall of the guide ring can make close contact with the push rod to generate sufficient friction, thereby enabling the push rod to maintain its position and fix the moving device at the top corner of the precast layer.

[0024] Building upon this foundation, to prevent parts from scattering, an elastic portion can be fixedly installed on the first semi-ring, and the other end of the elastic portion can be fixedly connected to the second semi-ring. At this point, even if the fixing nut is completely unscrewed from the first and second semi-rings, the first and second semi-rings can still be interconnected, thereby improving the overall integrity of the invention. Operators no longer need to perform additional gripping to prevent parts from scattering, thus simplifying the operation steps and reducing the difficulty of operation. Furthermore, due to the elastic properties of the elastic portion, when the fixing nut is screwed onto the first and second semi-rings, the elastic force generated by the deformation of the elastic portion can press the two connecting threads located on the first and second semi-rings against the internal thread of the fixing nut, making the connection more secure and improving the reliability of the connection, thereby contributing to the improved reliability of the invention.

[0025] Preferably, the opening of the receiving groove is provided with a storage groove, a spring is fixedly installed in the storage groove, an installation block is fixedly installed on the spring, the top of the installation block abuts against the storage groove, and a brush is fixedly installed on the installation block, the brush being in contact with the outer surface of the ball.

[0026] By setting bristles, the gap between the receiving groove and the ball can be blocked, and because the bristles are in contact with the outer surface of the ball, the debris adhering to the ball can be swept away by the bristles. This prevents the debris from the external components carried by the ball from entering the gap between the receiving groove and the ball when it rolls, thus helping to ensure the smooth rolling of the ball in the receiving groove. As a result, the moving device can help the prefabricated layer move smoothly, thereby ensuring the effectiveness of the invention.

[0027] Additionally, as the ball rolls into the receiving groove at the friction point with the bristles, the bristles can sweep away debris from the ball. At the same time, this debris may also stick to the bristles and accumulate, thus affecting the cleaning effect of the bristles during continuous use.

[0028] By incorporating a spring and a mounting block, when the ball rolls into the receiving groove at the friction point with the bristles, the mounting block abuts against the groove and is thus fixed in place, keeping the bristles stationary to clean the ball. When the ball rolls out of the receiving groove at the friction point with the bristles, the spring deforms due to the friction between the ball and the bristles, causing the mounting block to move downwards. This causes the bristles to move away from the ball, reducing the normal pressure between them and decreasing the friction. The spring's elasticity then lifts the mounting block and bristles back upwards to contact the ball, repeating the process. This causes the mounting block to vibrate frequently, shaking off the bristles and removing any adhering debris. This achieves self-cleaning of the bristles during use, improving the reliability of the invention and reducing maintenance requirements.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] 1. By incorporating a moving device, when the precast layer is moved by a pry bar, it rotates around two adjacent ball bearings on the opposite side of the pry bar. At this point, the precast layer temporarily separates from its corresponding support structure, and the ball bearings contact the support structure, generating friction. Therefore, there is no sliding friction between the precast layer and its support structure; instead, rolling friction occurs between the ball bearings and the support structure, reducing frictional force. This allows construction workers to move the precast layer with less force, lowering the construction difficulty.

[0031] 2. By incorporating a locking device, the push rod maintains its position even after the construction worker releases their hands. This allows the moving device to be fixed to the precast layer, ensuring a stable position during subsequent movement of the precast layer. This effectively reduces friction and improves the reliability and stability of the invention. Furthermore, when the base of the moving device needs to be disassembled, the locking device allows for a one-time installation and disassembly of all moving devices, reducing repetitive and mechanical labor and thus improving the efficiency of the invention.

[0032] 3. By setting a fixing nut, half-ring one, and half-ring two, when the construction personnel need to move the grip ring, they can unscrew the fixing nut from half-ring one and half-ring two in advance, so that half-ring one and half-ring two are no longer fixed to each other, but can be separated from each other. As a result, the tightness of the contact between the friction plate and the push rod is reduced, and the moving resistance of the push rod is also reduced. Therefore, the push rod can move more easily in the guide ring, reducing the operational difficulty of the invention during use. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention after construction is completed;

[0034] Figure 2 This is a schematic diagram of the overall structure of the main inventive part of the present invention;

[0035] Figure 3 for Figure 2 Schematic diagram of the planar structure under section AA;

[0036] Figure 4 for Figure 2 A magnified view of part B in the middle section;

[0037] Figure 5 for Figure 2 Schematic diagram of the planar structure under the middle CC section;

[0038] Figure 6 for Figure 4 Schematic diagram of the planar structure under the DD section;

[0039] Figure 7 for Figure 5 A magnified view of part E in the middle;

[0040] Figure 8 for Figure 3 A magnified view of part F in the middle section.

[0041] In the diagram: 1. Precast layer; 2. Reinforcing steel bar; 3. Cast-in-place layer; 4. Base; 5. Fixing claw; 11. Mounting groove; 41. Receiving groove; 42. Ball bearing; 43. Buckle plate; 44. Brush bristles; 45. Rounded chamfer; 46. Storage groove; 47. Mounting block; 48. Spring piece; 51. Mounting plate; 52. Mounting hole; 53. Guide ring; 54. Push rod; 55. Grip ring; 56. Fixing nut; 431. Connecting groove; 451. Permanent magnet; 531. Semi-ring part one; 532. Semi-ring part two; 533. Friction plate; 534. Elastic part; 535. Connecting thread; 5311. Connecting part one; 5321. Connecting part two. Detailed Implementation

[0042] The following description, with the aid of the accompanying drawings listed in the foregoing "Description of Drawings", will clearly illustrate the specific embodiments of the present invention, in order to enable readers to have a more complete and objective understanding of the working principle and corresponding technical effects of the present invention.

[0043] like Figures 1 to 8 The image shows a specific embodiment of the present invention.

[0044] When this invention is installed, the reinforcing steel bars 2 and the snap-on plates 43 are first placed in a precast mold at the factory, wherein the precast mold has a pre-reserved mounting groove 11. Then, concrete is poured into the precast mold and allowed to solidify, forming the precast layer 1. A cast-in-place layer 3 is fixedly installed on the precast layer 1, with the reinforcing steel bars 2 embedded within it. The precast layer 1 is square, and movable devices are provided at its four corners, along with locking devices.

[0045] The mobile device includes four mounting slots 11 located at the four corners of the prefabricated layer 1. Each mounting slot 11 has an L-shaped buckle plate 43 fixedly installed on its inner wall, with one end of the L-shape of the buckle plate 43 protruding from the bottom surface of the mounting slot 11. A base 4 is provided inside the mounting slot 11, and a receiving slot 41 is provided inside the base 4. A ball bearing 42 is movably installed inside the receiving slot 41. A docking slot 431 is provided on the base 4 to receive one end of the buckle plate 43 protruding from the bottom surface of the mounting.

[0046] The locking device includes a guide ring 53 set on the prefabricated layer 1, a push rod 54 passing through the guide ring 53, a grip ring 55 fixedly installed at the top of the push rod 54, and a mounting plate 51 fixedly installed at the bottom of the push rod 54. The mounting plate 51 has four mounting holes 52. Four fixing claws 5 are rotatably installed on the guide ring 53, and the four fixing claws 5 are respectively fixedly connected to the four bases 4. A friction plate 533 is fixedly installed inside the guide ring 53.

[0047] Additionally, one end of the buckle plate 43 protruding from the bottom surface of the mounting groove 11 is located at the top of the buckle plate 43, and the top surface height of the buckle plate 43 is lower than the top surface height of the precast layer 1. A fixing nut 56 is provided on the guide ring 53. The guide ring 53 includes a first semi-ring portion 531 and a second semi-ring portion 532. A first connecting portion 5311 and a second connecting portion 5321 are respectively fixedly installed on the first semi-ring portion 5311 and the second connecting portion 5321. Connecting threads 535 are provided on both the first connecting portion 5311 and the second connecting portion 5321, and these threads are used to engage with the threads of the fixing nut 56. Two fixing claws 5 are each installed on the first semi-ring portion 531 and the second semi-ring portion 532. An elastic portion 534 is fixedly installed on the first semi-ring portion 531, and the elastic portion 534 is fixedly connected to the second semi-ring portion 532. A storage slot 46 is provided at the opening of the receiving slot 41. A spring piece 48 is fixedly installed in the storage slot 46. A mounting block 47 is fixedly installed on the spring piece 48. A brush bristle 44 is fixedly installed on the mounting block 47. The brush bristle 44 is in contact with the outer surface of the ball bearing 42. A rounded chamfer 45 is provided on the base 4. The rounded chamfer 45 is located at the bottom end of the base 4 on the side near the buckle plate 43.

[0048] When this invention is in operation, the locking device can fix the moving device to the precast layer 1. Therefore, when the precast layer 1 is repositioned by construction workers using a crowbar, the moving device changes the friction between the precast layer 1 and its supporting structure from sliding friction to rolling friction, thereby reducing friction and making the precast layer 1 easier to move. This facilitates the workers in adjusting the precast layer 1 to the appropriate placement position, reducing the workload. Furthermore, once the precast layer 1 is in the correct position, the locking device can be used to detach the moving device from the precast layer 1. This allows both the moving device and the locking device to be reused during multiple installations of multiple precast layers 1, thus reducing the application cost of this invention.

[0049] In addition, after the moving device and locking device are removed from the precast layer 1, when the casting layer 3 is poured onto the precast layer 1, it can also fill the gaps caused by the removal of the components, thus enabling the building floor slab constructed by the present invention to have good integrity during use.

[0050] Specifically, the mobile device works as follows: when the prefabricated layer 1 is placed on the corresponding support structure, the bottom surface of the prefabricated layer 1 contacts the support structure, and the bottom height of the ball bearing 42 is flush with the bottom surface of the prefabricated layer 1. On the horizontal plane, the straight lines of the four sides of the prefabricated layer 1 form a rectangle, and the bottom end of the ball bearing 42 is located outside the rectangle.

[0051] In use, the mating groove 431 on the base 4 engages with the L-shaped snap plate 43, and the locking device secures the engagement. Therefore, when the precast layer 1 is pried open with a pry bar, the torque on the precast layer 1 is transmitted to the base 4 through the engagement of the snap plate 43 and the mating groove 431. Thus, when the construction worker pries up one side of the precast layer 1 with a pry bar, the precast layer 1 will rotate around two adjacent ball bearings 42 on the opposite side as fulcrums. At this time, the precast layer 1 and its corresponding support structure will temporarily separate, and the ball bearings 42 will then contact and rub against the support structure. Therefore, there is no sliding friction between the precast layer 1 and its corresponding support structure; instead, rolling friction occurs between the ball bearings 42 and the support structure, reducing friction and allowing the construction worker to move the precast layer 1 with less force, thus reducing construction difficulty.

[0052] In this regard, it is worth adding that, for the rectangular prefabricated layer 1, a planar coordinate system is constructed on the horizontal plane using the two sides of the prefabricated layer 1 adjacent to the moving device as coordinate axes, and the position of the prefabricated layer 1 is taken as the fourth quadrant. Therefore, the bottom end of the ball bearing 42 should be located in the second quadrant. This ensures that the ball bearings 42 in any two adjacent moving devices can act as fulcrums when the prefabricated layer 1 is pried open with a pry bar, causing the bottom surface of the prefabricated layer 1 to separate from its corresponding support structure. Thus, the ball bearings 42 only need to be arranged at the four apex corners of the prefabricated layer 1, which helps reduce the number of moving devices required, thereby reducing the workload during assembly and improving production efficiency.

[0053] In addition, the end of the snap-on plate 43 protruding from the bottom surface of the mounting groove 11 should be located at the top of the snap-on plate 43, and the height of the top surface of the snap-on plate 43 should be lower than the height of the top surface of the precast layer 1. Therefore, when the casting layer 3 is poured on top of the precast layer 1, the casting layer 3 can have a larger bonding area with the precast layer 1, which helps to ensure the tightness of the bonding of the composite slab, and thus helps to ensure the overall structural strength of the composite slab.

[0054] The locking device operates as follows: When installing the moving device onto the precast layer 1, the worker first holds the guide ring 53 with one hand and the grip ring 55 with the other. Then, the hand holding the grip ring 55 lifts upwards, causing the push rod 54 to move under the guidance of the guide ring 53. The mounting plate 51 is also lifted, causing the inner wall of the mounting hole 52 to press against the fixing claw 5, causing the fixing claw 5 to open outwards until the area of ​​the rectangle formed by the four bases 4 as vertices is greater than the rectangular area of ​​the precast layer 1. At this point, the worker moves the locking device and the moving device to the precast layer 1, aligning the four moving devices with the four corners of the precast layer 1, and then lowers them so that each moving device falls into its corresponding mounting slot 11. Then, while keeping the guide ring 53 stationary, the construction worker can push the grip ring 55 downwards. As a result, the push rod 54 presses down the mounting plate 51, and the inner wall of the mounting hole 52 squeezes the fixing claw 5, causing the fixing claw 5 to retract inwards. Thus, each moving device installed on each fixing claw 5 is fastened into the four mounting slots 11 of the precast layer 1. At the same time, the docking slot 431 on the base 4 of the moving device is also fastened onto the fastening plate 43. In addition, the friction force of the friction plate 533 on the inner side of the guide ring 53 on the push rod 54 allows the push rod 54 to maintain its position even after the construction worker releases his hands. Thus, the moving device is fixed on the precast layer 1, thereby providing a stable position during subsequent movement of the precast layer 1, effectively reducing friction, and improving the reliability and stability of the invention.

[0055] In this invention, to reduce costs, the moving device is designed to be detachable from the prefabricated layer 1, allowing the moving device and locking device to be reused during multiple installations of multiple prefabricated layers 1. However, since the moving device is installed at various corners of the prefabricated layer 1, the process of disassembling and installing the moving device is mechanically repetitive. By providing the locking device, when the present invention requires disassembling and assembling the base 4 of the moving device, the installation and disassembly of all moving devices can be completed in one go using the locking device, reducing repetitive and mechanically identical labor, thereby improving the efficiency of the present invention.

[0056] Furthermore, it is worth noting that when the fixing claw 5 retracts with the moving device, the bottom part of the base 4 of the moving device near the buckle plate 43 may interfere with the upper surface of the support structure of the prefabricated layer 1. As a result, the fixing claw 5 will experience additional resistance and jamming during movement. To address this, a rounded chamfer 45 can be provided on the bottom part of the base 4 near the buckle plate 43 to remove the part that may cause interference, thereby reducing the resistance during use and making the invention easier to operate.

[0057] In addition, in this invention, when the construction worker needs to push or pull the grip ring 55 to make the fixing claw 5 close or open, due to the presence of the friction plate 533, the construction worker needs to apply a large force to move the grip ring 55 smoothly, which makes the invention still difficult to operate and thus has a negative impact on the efficiency of the invention.

[0058] By dividing the guide ring 53 into a first semi-ring 531 and a second semi-ring 532, and fixing these two parts together with a fixing nut 56, the friction plate 533 is also divided into two parts and fixed to the first semi-ring 531 and the second semi-ring 532 respectively. Therefore, when the operator needs to move the grip ring 55, the fixing nut 56 can be unscrewed from the first semi-ring 531 and the second semi-ring 532 beforehand, so that the first semi-ring 531 and the second semi-ring 532 are no longer fixed together but can be separated. This reduces the tightness of the contact between the friction plate 533 and the push rod 54, and also reduces the resistance to the movement of the push rod 54. Thus, the push rod 54 can move more easily within the guide ring 53, reducing the operational difficulty of this invention during use. Correspondingly, when it is necessary to maintain and fix the position of the push rod 54, the first half-ring 531 and the second half-ring 532 can be joined together and the push rod 54 can be clamped in the middle. Then, the fixing nut 56 is screwed into the guide ring 53 composed of the first half-ring 531 and the second half-ring 532. Thus, the friction plate 533 on the inner wall of the guide ring 53 can make close contact with the push rod 54 to generate sufficient friction, thereby enabling the push rod 54 to maintain its position and thus fix the moving device at the top corner of the precast layer 1.

[0059] It should be emphasized that, based on the content described above, although the beneficial effects of the present invention have been explained in detail and corresponding specific embodiments have been provided, those skilled in the art can still achieve the same technical effects by making conventional substitutions, modifications, or other alterations to the given technical solutions without creative effort, provided they fully understand the working principle of the present invention. However, such modifications should not be considered as exceeding the scope of the present invention. Specifically, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reinforced concrete composite slab, comprising a precast layer (1), wherein reinforcing bars (2) are fixedly embedded in the precast layer (1), and a cast-in-place layer (3) is fixedly installed on the precast layer (1), wherein the reinforcing bars (2) are embedded in the cast-in-place layer (3), characterized in that, The prefabricated layer (1) is square, and a moving device is provided at each of the four corners of the prefabricated layer (1). A ball bearing (42) is provided inside the moving device. The ball bearing (42) is used to generate rolling friction between the prefabricated layer (1) and the supporting structure of the prefabricated layer (1). A locking device is provided on the prefabricated layer (1). A fixing claw (5) and a mounting plate (51) are provided inside the locking device. The mounting plate (51) presses the fixing claw (5) to press the moving device against the prefabricated layer (1).

2. The reinforced concrete composite slab according to claim 1, characterized in that, The mobile device includes four mounting slots (11) at the four corners of the prefabricated layer (1). Each mounting slot (11) has an L-shaped buckle plate (43) fixedly installed on its inner wall, and one end of the buckle plate (43) protrudes from the bottom surface of the mounting slot (11). A base (4) is provided in the mounting slot (11), and a receiving slot (41) is provided in the base (4). A ball bearing (42) is movably installed in the receiving slot (41). A docking slot (431) is provided on the base (4), and the docking slot (431) is used to receive one end of the buckle plate (43) protruding from the bottom surface of the mounting.

3. A reinforced concrete composite slab according to claim 2, characterized in that, The locking device includes a guide ring (53) disposed on the prefabricated layer (1), a push rod (54) passing through the guide ring (53), a grip ring (55) fixedly installed at the top end of the push rod (54), an mounting plate (51) fixedly installed at the bottom end of the push rod (54), four mounting holes (52) are provided on the mounting plate (51), four fixing claws (5) are rotatably installed on the guide ring (53), and the four fixing claws (5) are respectively fixedly connected to four bases (4); a friction plate (533) is fixedly installed inside the guide ring (53).

4. A reinforced concrete composite slab according to claim 2, characterized in that, One end of the buckle plate (43) protruding from the bottom surface of the mounting groove (11) is located at the top of the buckle plate (43), and the top surface height of the buckle plate (43) is lower than the top surface height of the prefabricated layer (1).

5. A reinforced concrete composite slab according to claim 3, characterized in that, A fixing nut (56) is provided on the guide ring (53). The guide ring (53) includes a first half ring (531) and a second half ring (532). A first connecting part (5311) and a second connecting part (5321) are respectively fixedly installed on the first half ring (531) and the second half ring (532). A connecting thread (535) is provided on the first connecting part (5311) and the second connecting part (5321). The connecting thread (535) is used to mesh with the thread of the fixing nut (56). Two fixing claws (5) are installed on the first half ring (531) and the second half ring (532).

6. A reinforced concrete composite slab according to claim 5, characterized in that, An elastic part (534) is fixedly installed on the first semi-ring (531), and the elastic part (534) is fixedly connected to the second semi-ring (532).

7. A reinforced concrete composite slab according to claim 2, characterized in that, The receiving groove (41) has a storage groove (46) at its opening. A spring piece (48) is fixedly installed in the storage groove (46). An installation block (47) is fixedly installed on the spring piece (48). The top of the installation block (47) abuts against the storage groove (46). A brush bristle (44) is fixedly installed on the installation block (47). The brush bristle (44) is in contact with the outer surface of the ball (42).

8. A reinforced concrete composite slab according to claim 3, characterized in that, The base (4) has a rounded chamfer (45) located at the bottom end of the base (4) near the buckle (43). A permanent magnet (451) is fixedly installed on the rounded chamfer (45), and the permanent magnet never contacts the buckle (43).

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