Large-span horizontal load-bearing safety device based on overhanging layer type steel and construction method

Abstract

The application provides a large-span horizontal load-bearing safety device based on a cantilever layer type steel and a construction method, and relates to the technical field of building construction. The large-span horizontal load-bearing safety device is installed on the type steel and is used for freely arranging and recycling a safety flat net in a structure plane. The guide rail is configured to move horizontally in parallel with the type steel. The transmission assembly is used for pushing the guide rail to realize horizontal movement. The connecting assembly is used for forming self-locking with the guide rail to lock the movement position of the guide rail. The first hook assembly is used for driving the safety flat net to move horizontally or stop moving. The second hook assembly is used for realizing the height difference between the inside and outside of the safety flat net. The wedge of the connecting assembly is used for fixing the guide rail, so that the installation is facilitated. The guide rail can be used for remotely controlling the installation of the installer, so that the installation risk is reduced. The first hook assembly can be used for quickly unfolding and recycling the safety flat net, so that the engineering efficiency is improved and the engineering risk is reduced.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a large-span horizontal load-bearing safety device and construction method based on cantilevered steel sections. Background Technology

[0002] In existing technologies, safety nets for large-span horizontal load-bearing structures require the installation of safety nets below each floor. These safety nets are typically connected to the external scaffolding via threaded steel pipes. This method of connecting the safety net structure to the scaffolding presents a significant drawback: high-altitude work is highly dangerous. Furthermore, in traditional safety net installation, the safety net is usually directly tied to the structural surface, making it difficult to replace the tying points.

[0003] Therefore, there is an urgent need for a large-span horizontal load-bearing safety device based on cantilevered layer steel profiles, which can not only solve the problems of installation and dismantling of the cantilevered layer and horizontal netting installation, but also facilitate installation and reduce installation risks. Summary of the Invention

[0004] To address at least one of the aforementioned technical problems, this invention provides a large-span horizontal load-bearing safety device and construction method based on cantilevered steel sections.

[0005] The technical solution of the present invention is as follows:

[0006] A large-span horizontal load-bearing safety device based on cantilevered steel profiles, installed on the steel profiles, is used for the free arrangement and retrieval of safety nets in the structural plane. The large-span horizontal load-bearing safety device includes:

[0007] The guide rail is mounted on the steel profile via a support, and is configured to move horizontally parallel to the steel profile.

[0008] A transmission assembly, connected to the guide rail, is used to propel the guide rail to achieve the horizontal movement;

[0009] A connecting component supports the guide rail and is used to form a self-locking mechanism with the guide rail to secure the movement position of the guide rail;

[0010] The first hook assembly, mounted on the guide rail, is used to drive the safety net to move horizontally or stop moving; and

[0011] The second hook assembly is installed at the lower part of the steel profile to achieve the height difference between the inside and outside of the safety net.

[0012] Furthermore, the guide rail is a threaded rod, and supports are installed at both ends of the guide rail.

[0013] Furthermore, the transmission assembly includes:

[0014] The second rotating shaft is used for power input;

[0015] There are two drive threaded rods arranged left and right. The two ends of each drive threaded rod form a drive shaft and are fixed to the steel section by the corresponding fifth support.

[0016] Two pulleys, both connected to the second rotating shaft, are used to transmit the power input from the second rotating shaft;

[0017] There are two belts, each corresponding to one of the two pulleys and the two threaded transmission rods. One end of one pulley is fitted onto the corresponding pulley, and the other end of the pulley is fitted onto the drive shaft of the corresponding threaded transmission rod, for driving the corresponding threaded transmission rod to rotate.

[0018] Furthermore, the connection component includes:

[0019] The component serves as an installation base and is fixedly connected to the steel profile.

[0020] A rotating shaft is formed on the component;

[0021] The first to third connecting members are mounted on the rotating shaft and connected to the component via corresponding springs. They can rotate around the rotating shaft under the action of the corresponding springs. The springs corresponding to the first and third connecting members are mounted on the same side, while the springs corresponding to the second connecting member are mounted on opposite sides. The first to third connecting members are provided with a horizontally penetrating first through hole and a second through hole arranged in parallel.

[0022] A wedge is installed at the top of the first to third connecting members to fix the first to third connecting members, so as to ensure that the transmission assembly passes smoothly through the first through hole and the guide rail passes smoothly through the second through hole.

[0023] Furthermore, the first hook assembly includes:

[0024] A chain drive mechanism is mounted on the guide rail and configured to transmit power input at one end of the guide rail to the other end of the guide rail via the chain drive mechanism;

[0025] The outer shell panel consists of two panels arranged in a front-to-back configuration, and the two outer shell panels are connected by a pin and a hook rotating shaft.

[0026] A gear transmission mechanism is disposed in the outer shell and connected to the chain transmission mechanism. It is configured to change the transmission direction of the chain transmission mechanism to rotation about the horizontal direction. The first hook assembly is fed along the horizontal direction of the guide rail by the threaded engagement of the gear transmission mechanism with the guide rail.

[0027] A braking unit, disposed in the housing plate and configured to move along the guide rail with the gear transmission mechanism, stops rotating near the end of the guide rail to achieve braking; and

[0028] Hooks are fixedly installed on the lower part of the two outer shell plates;

[0029] The gear transmission mechanism and the braking unit are arranged vertically in parallel.

[0030] Furthermore, the chain drive mechanism includes:

[0031] A first rotating shaft is disposed at one end of the guide rail and is used to output the power required by the first hook assembly;

[0032] Two gears are arranged at both ends of the guide rail. The gear closer to the first rotating shaft is connected to the first rotating shaft and rotates with it.

[0033] A chain is connected between the two gears to form a chain drive with the two gears.

[0034] Furthermore, the gear transmission mechanism includes:

[0035] A first gear, a second gear, a third gear, and a fourth gear; the first gear meshes with the chain; the first gear also meshes with the second gear; the second gear also meshes with the third gear; the third gear also meshes with the fourth gear; and the fourth gear is connected to the brake unit via a first protrusion.

[0036] A threaded ring is fitted into the braking part and connected to it via a second protrusion.

[0037] Furthermore, the braking part is a brake disc, and multiple brake shafts are provided on one surface of the brake disc. The multiple brake shafts are evenly distributed along the circumference of the brake disc, and multiple hook springs are provided on the other surface of the brake disc. The multiple hook springs are evenly distributed along the circumference of the brake disc.

[0038] Furthermore, the second hook assembly includes:

[0039] Two L-shaped steel beams are provided, and the two L-shaped steel beams are tightly fitted together with the steel beam.

[0040] A U-shaped steel component, wherein the U-shaped steel component is connected to the two L-shaped steel components by bolts, and a pad is placed on the open side of the U-shaped steel component; and

[0041] The hook is mounted on the bottom of the U-shaped steel component via a bearing.

[0042] The present invention also provides a construction method for the above-mentioned large-span horizontal load-bearing safety device based on cantilevered steel sections, characterized by comprising the following steps:

[0043] The connecting assembly is installed on top of the steel profile;

[0044] The second hook assembly is installed on the lower part of the steel profile;

[0045] The guide rail is attached to the transmission assembly and passes through the connecting assembly;

[0046] The guide rail is driven to move horizontally to a predetermined position by the transmission component, the guide rail is locked by the connecting component, the second hook component is adjusted to a predetermined position, and the safety net is suspended on the hook of the second hook component to achieve the purpose of the safety net deployment.

[0047] The first hook assembly is installed on the guide rail. The safety net is unfolded by the horizontal movement of the first hook assembly relative to the guide rail, and the safety net is retracted by the reverse movement of the first hook assembly.

[0048] The beneficial effects of this invention are as follows:

[0049] This invention relates to a large-span horizontal load-bearing safety device based on cantilevered steel profiles, comprising a guide rail, a transmission assembly, a connecting assembly, a first hook assembly, and a second hook assembly. The guide rail is fixed by wedges in the connecting assembly, facilitating the installation of the horizontal safety net structure. The guide rail allows for remote control of the installation by installers, reducing installation risks. The first hook assembly enables rapid deployment and retrieval of the safety net, improving project efficiency and reducing project risks. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the overall structure of a large-span horizontal load-bearing safety device based on cantilevered steel profiles according to the present invention.

[0051] Figure 2 This is a schematic diagram of the connecting component assembly, transmission component and first hook assembly of a large-span horizontal load-bearing safety device based on cantilevered steel profiles according to the present invention.

[0052] Figure 3 This is a structural schematic diagram of the first hanging component of a large-span horizontal load-bearing safety device based on cantilevered steel profiles according to the present invention.

[0053] Figure 4 This is a schematic diagram of the transmission assembly of a large-span horizontal load-bearing safety device based on cantilevered steel profiles according to the present invention.

[0054] Figure 5 This is a schematic diagram of the second hanging structure component of a large-span horizontal load-bearing safety device based on cantilevered steel profiles according to the present invention;

[0055] Figure 6 This is a schematic diagram of the internal structure of the first hanging component of a large-span horizontal load-bearing safety device based on cantilevered steel profiles according to the present invention.

[0056] Figure 7 This is a frontal schematic diagram of the braking structure of a large-span horizontal load-bearing safety device based on cantilevered steel profiles according to the present invention.

[0057] Figure 8 This is a reverse schematic diagram of the braking structure of a large-span horizontal load-bearing safety device based on cantilevered steel profiles according to the present invention.

[0058] Figure 9 This is a schematic diagram of the braking structure of a large-span horizontal load-bearing safety device based on cantilevered steel profiles according to the present invention.

[0059] Figure 10 This is a schematic diagram of the working state of the connection components of a large-span horizontal load-bearing safety device based on cantilevered steel profiles according to the present invention.

[0060] The symbols in the diagram represent the following meanings:

[0061] A-type steel,

[0062] 100mm long-span horizontal load-bearing safety device

[0063] 1 guide rail,

[0064] 2 connecting components, 21 first connecting piece, 22 second connecting piece, 23 third connecting piece,

[0065] 3 wedges, 31 first wedge, 32 second wedge,

[0066] 4. Rotating shaft; 5. Component; 6. First support; 7. Bolt; 8. Spring; 9. Second support; 10. Third support.

[0067] 12 First hook assembly, 121 Pin, 122 Hook rotating shaft, 123 First gear, 124 Second gear, 125 Hook, 126 Brake shaft, 127 Third gear, 128 Fourth gear, 1211 Brake disc, 1212 First protrusion, 1213 Threaded ring, 1214 Hook spring, 1215 Second protrusion

[0068] 13 Transmission assembly, 131 Chain, 132 First rotating shaft, 133 Transmission threaded rod, 134 Gear, 135 Fourth support, 136 Transmission shaft, 137 Fifth support, 138 Second rotating shaft, 139 Sixth support, 1310 Transmission belt.

[0069] 14 Second hook assembly, 141 L-shaped steel, 142 Bolt, 143 U-shaped steel component, 144 Pad, 145 Rotary bearing, 146 Hook. Detailed Implementation

[0070] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0071] refer to Figures 1 to 10 This embodiment provides a large-span horizontal load-bearing safety device 100 based on cantilevered steel sections. Installed on steel section A, it is used for the free arrangement and retrieval of the safety net in the structural plane, such as... Figure 1 As shown, the large-span horizontal load-bearing safety device 100 includes: a guide rail 1, a transmission assembly 13, a connecting assembly 2, a first hook assembly 12, and a second hook assembly. The guide rail 1 is mounted on the steel section A via a support, specifically a second support 9, and is configured to move horizontally parallel to the steel section A. The transmission assembly 13 is connected to the guide rail 1 and is used to advance the guide rail 1 to achieve the horizontal movement. The connecting assembly 2 supports the guide rail 1 and is used to form a self-locking mechanism with the guide rail 1 to secure its position. The first hook assembly 12 is mounted on the guide rail 1 and is used to drive the safety net to move horizontally or stop its movement. The second hook assembly is mounted at the lower part of the steel section A and is used to achieve the height difference between the inside and outside of the safety net.

[0072] This invention relates to a large-span horizontal load-bearing safety device based on cantilevered steel profiles, comprising a guide rail 1, a transmission assembly 13, a connecting assembly 2, a first hook assembly 12, and a second hook assembly. The guide rail 1 is fixed by the wedges of the connecting assembly 2, facilitating the installation of the horizontal safety net structure. The guide rail 1 allows for remote control of the installation by the installer, reducing installation risks. The first hook assembly 12 enables rapid deployment and retrieval of the safety net, improving project efficiency and reducing project risks.

[0073] In a preferred embodiment, the guide rail 1 is a threaded rod, which is fixed to the steel section A by the connecting assembly 2 and the support 9. The fifth support is installed at both ends of the guide rail 1.

[0074] In a preferred embodiment, the transmission assembly 13 includes: a second rotating shaft, a transmission threaded rod, a pulley, and a belt. The second rotating shaft 138 is used to input power and is connected to the same steel section A via a sixth support 139. There are two transmission threaded rods arranged left and right, with each threaded rod forming a transmission shaft at both ends and fixed to the steel section A via a corresponding fifth support. There are two pulleys, both connected to the second rotating shaft, used to transmit the power input from the second rotating shaft. There are two belts, corresponding one-to-one with the two pulleys and the two transmission threaded rods. One end of one pulley is fitted onto the corresponding pulley, and the other end of the other pulley is fitted onto the transmission shaft of the corresponding transmission threaded rod, used to drive the corresponding transmission threaded rod to rotate.

[0075] In this embodiment, the guide rail 1 is attached to the transmission threaded rod 133 and moves forward by rotating the transmission threaded rod 133; the transmission shaft 136 is connected to the transmission threaded rod 133; the fifth support 137 fixes the transmission shaft 136 and the transmission threaded rod 133 to the steel section A; the second rotating shaft 138 is connected to the transmission shaft 136 through the transmission belt 1310. The guide rail 1 moves forward and backward under the action of the transmission threaded rod 133, the second support 9 ensures that the guide rail 1 will not tilt forward, the transmission threaded rod 133 rotates under the action of the second rotating shaft 138, and the second rotating shaft 138 rotates under the action of the transmission belt 1310 and the second rotating shaft 138, all of which ensure that the guide rail 1 can move.

[0076] In a preferred embodiment, the connecting assembly 2 includes: a component 5, a rotating shaft 4, a first connecting member 21, a second connecting member 22, a third connecting member 23, and a wedge block 3. The component 5 serves as an installation base and is fixedly connected to the steel section A. The rotating shaft 4 is formed on the component 5. The first connecting member 21, the second connecting member 22, and the third connecting member 23 are mounted on the rotating shaft 4 and connected to the component 5 via corresponding springs 8. They can rotate around the rotating shaft 4 under the action of the corresponding springs 8. The springs 8 corresponding to the first connecting member 21 and the third connecting member 23 are mounted on the same side, while the springs 8 corresponding to the second connecting member 22 are mounted on opposite sides. The first connecting member 21, the second connecting member 22, and the third connecting member 23 are provided with a horizontally penetrating first through hole and a second through hole arranged in parallel. The wedge 3 is installed at the top of the first connector 21, the second connector 22 and the third connector 23 to fix the first connector 21, the second connector 22 and the third connector 23, so as to ensure that the transmission assembly 13 passes smoothly through the first through hole and the guide rail 1 passes smoothly through the second through hole.

[0077] In specific implementation, component 5 is connected to the same type of steel A via bolts 7. Component 5 connects the rotating shaft 4 to the same type of steel A in the form of a support. Each connecting piece has a third support 10, and component 5 has a first support 6, ensuring that the spring 8 can be connected to both. When the spring 8 is under tension, it connects the corresponding connecting piece to component 5. The first wedge 31 fixes the first connecting piece 21 and the second connecting piece 22, and the second wedge 32 fixes the second connecting piece 22 and the third connecting piece 23, ensuring that the guide rail 1 and the chain 131 can pass smoothly through the second through hole and the first through hole of the connecting assembly 2. The lower part of the connecting piece assembly has a notch, the angle of which is smaller than the rotatable angle between the rotating shaft 4 and the connecting assembly 2, allowing the connecting assembly 2 to rotate at a small angle via the rotating shaft 4.

[0078] In a preferred embodiment, the first hook assembly 12 includes: a chain drive mechanism, a housing plate, a gear drive mechanism, a brake, and a hook 125. The chain drive mechanism is mounted on the guide rail 1 and configured to transmit power from one end of the guide rail 1 to the other end via the chain drive mechanism. Two housing plates are arranged front-to-back, connected by a pin 121 and a hook rotation shaft 122. The gear drive mechanism is disposed within the housing plate and connected to the chain drive mechanism, configured to change the transmission direction of the chain drive mechanism to rotation about a horizontal direction. The first hook assembly 12 is fed horizontally along the guide rail 1 through threaded engagement between the gear drive mechanism and the guide rail 1. The brake is disposed within the housing plate and configured to move along the guide rail 1 with the gear drive mechanism, stopping rotation near the end of the guide rail 1 to achieve braking. The hook 125 is fixedly mounted on the lower part of the two housing plates. The hook 125 is connected to a safety net. The gear drive mechanism and the brake are arranged vertically parallel.

[0079] In a preferred embodiment, the chain drive mechanism includes: a first rotating shaft 132, gears, and a chain. The first rotating shaft 132 is disposed at one end of the guide rail 1 and is used to output the power required by the first hook assembly 12. Two gears are arranged at both ends of the guide rail 1, with the gear closest to the first rotating shaft 132 connected to and rotating with the first rotating shaft 132. Gear 134 is fixed to the guide rail 1 by a fourth support 135. The chain is connected between the two gears to form a chain drive.

[0080] In a preferred embodiment, the gear transmission mechanism includes: a first gear 123, a second gear 124, a third gear 127, a fourth gear 128, and a threaded ring 1213. The first gear 123 meshes with the chain, and also meshes with the second gear 124. The second gear 124 meshes with the third gear 127, and the third gear 127 meshes with the fourth gear 128. The fourth gear 128 is connected to the braking part via a first protrusion 1212. The threaded ring 1213 is fitted into the braking part and connected to it via a second protrusion 1215.

[0081] In a preferred embodiment, the braking unit is a brake disc 1211. Multiple brake shafts 126 are provided on one surface of the brake disc 1211, evenly distributed along the circumference of the brake disc 1211. Multiple hook springs 1214 are provided on the other surface of the brake disc 1211, also evenly distributed along the circumference of the brake disc 1211. The brake shafts 126 are connected to the brake disc 1211, so that under external force, the brake disc 1211 disengages from the threaded disc, ensuring the hook stops moving forward.

[0082] In a preferred embodiment, the second hook assembly includes: an L-shaped steel bar 141, a U-shaped steel component 143, and a hook 146. Two L-shaped steel bars 141 are present, and these two L-shaped steel bars 141 are tightly fitted against the steel bar A. The U-shaped steel component 143 is connected to the two L-shaped steel bars 141 by bolts 142. A pad 144 is placed on the open side of the U-shaped steel component 143 to ensure sufficient friction for limiting its position. The hook 146 is mounted on the bottom of the U-shaped steel component 143 via a bearing, and the position of the hook 146 can be adjusted by rotation under the action of the bearing.

[0083] In practice, L-shaped steel 141 overlaps the lower part of steel section A. Hook 146 can rotate freely via rotating bearing 145. Bolt 142 connects L-shaped steel 141 to U-shaped steel component 143, ensuring the horizontal stability of L-shaped steel 141. Pad 144 is placed between steel section A and U-shaped steel component 143 to increase the friction between L-shaped steel 141 and steel section A, ensuring that L-shaped steel 141 does not move longitudinally.

[0084] The working process of this embodiment is as follows:

[0085] In this embodiment, as Figure 4As shown, rotating the second rotating shaft 138 can drive the transmission belt 1310, which in turn drives the transmission shaft 136 to rotate the transmission threaded rod 133. The guide rail 1 can move forward by rotating the two transmission threaded rods 133. The second support 9 can limit the movement and ensure that the guide rail 1 is tightly connected with the transmission threaded rod 133. Through the transmission of the above transmission components 13, the guide rail 1 can move forward to the designated position.

[0086] In this embodiment, as Figure 4 As shown, rotating the first rotating shaft 132 can drive the gear 134 and chain 131 to move, as... Figure 5 As shown, the rotation of the second gear 124 can be achieved by the movement of the chain 131; as Figure 6 As shown, the rotation of the second gear 124 drives the rotation of the third gear 127; the rotation of the third gear 127 drives the rotation of the fourth gear 128; as... Figure 7 As shown, the rotation of the fourth gear 128 drives the brake disc 1211 to rotate via the first protrusion 1212; as Figure 8 As shown, see also Figure 9 The rotation of the brake disc 1211 drives the threaded ring 1213 to rotate via the second protrusion 1215; as Figure 8 As shown, the rotation of the threaded disc 1213 enables the first hook assembly 12 to move forward on the guide rail 1.

[0087] In this embodiment, as Figure 5 As shown, the brake shaft 126 of the first hook assembly 12 is the same as the front end support 135 of the threaded steel pipe (see...). Figure 2 When they come into contact, a force opposite to the direction of motion is generated, such as... Figure 8 As shown, this causes the brake disc 1211 to move in the opposite direction under the action of the hook spring 1214, causing the second protrusion 1215 to disengage from the threaded ring 1213, as... Figure 5 As shown, this ensures that the rotation of the third gear 127 does not affect the gear 128, as illustrated in the attached diagram. Figure 9 The state shown causes the first hook assembly 12 to stop moving forward.

[0088] In this embodiment, as Figure 8 As shown, see also Figure 2 When there is no external force, the hook spring 1214, under its own spring elasticity, causes the second protrusion 1215 to reconnect with the threaded disc 1213. When the first rotating shaft 132 is rotated in the opposite direction, the first hook assembly 12 can be rotated in the opposite direction.

[0089] In this embodiment, as Figure 5 As shown, removing the pin 121 allows the first hook assembly 12 to be divided into three parts and rotated along the hook rotation axis 122, ensuring that it can be installed on the guide rail 1 and the chain 131.

[0090] In this embodiment, as Figure 2 As shown, the connecting component 2 should be customized, and the rotatable angle of its notch 20 should be smaller than the angle between the guide rail 1 and the connecting component 2 to ensure the reliability of the connecting component 2 in fixing the guide rail 1; the spring 8 should be made of high-strength material to ensure the tensile strength and stability of the connecting component 2; by inserting the wedge 3 with external force, the guide rail 1 can pass through the second through hole. After the guide rail 1 is inserted into the predetermined position, the first wedge 31 and the second wedge 32 can be pulled out, as shown. Figure 10 As shown, at this time, the first connector 21 and the third connector 22 will move clockwise under the action of the prestressed spring, and the second connector 22 will move counterclockwise under the action of the prestressed spring, clamping the guide rail 1, which facilitates the installation of the safety net.

[0091] In this embodiment, the U-shaped steel component 143 and the L-shaped steel component 141 are connected by bolts to achieve horizontal limiting and prevent overturning; and the L-shaped steel component 141 is fixed to the same type of steel A by friction. At the same time, a pad 144 is added to the bottom of the groove of the U-shaped steel component 143 to increase the longitudinal friction and achieve the purpose of longitudinal limiting. This method of fixing and dismantling is relatively convenient and can be installed manually without the need for machinery, achieving the goal of economy and convenience.

[0092] This embodiment also provides a construction method for the above-mentioned large-span horizontal load-bearing safety device 100 based on cantilevered steel sections, including the following steps:

[0093] Step 1: As Figure 1 As shown, the connecting assembly 2 is first installed on the top of the steel section 1. Specific steps: Before the cantilevered steel section 1 is lifted, the component 5 is connected to the connecting assembly 2 with the wedge 3, and the bottom of the component 5 is installed onto the steel section 1 using bolts 5, ensuring that the connecting assembly 2 passes through the rotating shaft 4 and can rotate around it. Under external force, the spring 8 is connected to the connecting assembly 2, ensuring that the second through hole of the connecting assembly 2 can pass through the guide rail 1. The upper part of the connecting assembly 2 is fixed with the wedge 3.

[0094] Step Two: As Figure 3 As shown, the second hook assembly 14 is installed on the lower part of the steel section A. Specifically, this includes attaching the L-shaped steel section 141 to both sides of the lower leg of the steel section A, pre-installing the pad 17 inside the U-shaped steel component 143, and connecting the U-shaped component 143 and the L-shaped steel section 141 with bolts 142 to ensure that the L-shaped steel section 141 and the steel section A have sufficient friction to achieve a limiting effect.

[0095] Step 3: As Figure 4As shown, the guide rail 1 is attached to the transmission assembly 13 and passes through the connecting assembly 2. Specific steps: The guide rail 1 is attached to the two transmission screws 133, the second rotating shaft 138 is rotated, pushing the guide rail 1 through the second support 9, and then through the second through hole of the connecting assembly 2, thus achieving the forward movement of the guide rail 1.

[0096] Step Four: As Figure 2 As shown, the transmission assembly 13 drives the guide rail 1 to move horizontally to a predetermined position, such as... Figure 10 As shown, the guide rail 1 is locked by the connecting component 2, the second hook component 14 is adjusted to a predetermined position, and the safety net is suspended on the hook of the second hook component 14, thus achieving the purpose of the safety net deployment. Figure 10 As shown, the specific steps include: inserting the guide rail 1 along the second through hole of the connecting component 2, and after reaching a specified distance, pulling out the wedge 3, causing the first connecting component 21 and the third connecting component 22 to rotate clockwise under the pre-applied spring force of their corresponding springs 8, and causing the second connecting component 22 to rotate counterclockwise under the pre-applied spring force of its corresponding spring 8, thereby reducing the size of the first and second through holes, achieving the purpose of fixing the guide rail 1 through the first connecting component 21, the second connecting component 22 and the third connecting component 23, and adjusting the L-shaped steel 141 to reach the predetermined position, so that the safety net can be suspended at the hook 145, achieving the purpose of laying the safety net.

[0097] Step 5: As Figure 2 As shown, the first hook assembly 12 is installed on the guide rail 1. The safety net is unfolded by the horizontal movement of the first hook assembly 12 relative to the guide rail 1, and the safety net is retracted by the reverse movement of the first hook assembly 12. Figure 2 As shown, specifically, it includes: installing the first hook assembly 12 onto the chain 131 and the guide rail 1, and rotating the first rotating shaft 132, as shown. Figure 6 As shown, the first hook assembly 12 is positioned such that the second gear 124, the first gear 123, the third gear 127, the fourth gear 128, the brake disc 1211, and the first protrusion 1212 (see...) Figure 7 Under the action of the threaded disc 1213, it moves forward along the guide rail 1, and is supported by the brake shaft 126 and the spring 1214 (see...). Figure 9 ) and the second protrusion 1215 (see Figure 9 Under the action of ), the forward movement stops, achieving the purpose of unfolding the safety net. The first rotating shaft 132 is rotated in the opposite direction. Without external force, the elastic force of the spring 1214 causes the second protrusion 1215 to reconnect with the threaded disc 1213, which can achieve the purpose of reversing the first hook assembly 12 and thus retracting the safety net.

[0098] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A large-span horizontal load-bearing safety device based on cantilevered steel sections, characterized in that, Installed on structural steel, the safety netting is designed for free placement and retrieval within the structural plane. The large-span horizontal load-bearing safety device includes: The guide rail is mounted on the steel profile via a support, and is configured to move horizontally parallel to the steel profile. A transmission assembly, connected to the guide rail, is used to propel the guide rail to achieve the horizontal movement; A connecting component supports the guide rail and is used to form a self-locking mechanism with the guide rail to secure the movement position of the guide rail; The first hook assembly, mounted on the guide rail, is used to drive the safety net to move horizontally or stop moving; and The second hook assembly is installed at the lower part of the steel profile to achieve the height difference between the inside and outside of the safety net. The first hook assembly includes: A chain drive mechanism is mounted on the guide rail and configured to transmit power input at one end of the guide rail to the other end of the guide rail via the chain drive mechanism; The outer shell panels are two in number and arranged in a front-to-back configuration, and the two outer shell panels are connected by a pin and a hook rotating shaft. A gear transmission mechanism is disposed in the outer shell and connected to the chain transmission mechanism. It is configured to change the transmission direction of the chain transmission mechanism to rotation about the horizontal direction. The first hook assembly is fed along the horizontal direction of the guide rail by the threaded engagement of the gear transmission mechanism with the guide rail. A braking unit, disposed in the housing plate and configured to move along the guide rail with the gear transmission mechanism, stops rotating near the end of the guide rail to achieve braking; and Hooks are fixedly installed on the lower part of the two outer shell plates; The gear transmission mechanism and the braking unit are arranged vertically in parallel. The second hook assembly includes: Two L-shaped steel bars are provided, and the two L-shaped steel bars are tightly fitted together. A U-shaped steel component, wherein the U-shaped steel component is connected to two L-shaped steel components by bolts, and a pad is placed on the open side of the U-shaped steel component; and The hook is mounted on the bottom of the U-shaped steel component via a bearing.

2. The large-span horizontal load-bearing safety device based on cantilevered steel sections as described in claim 1, characterized in that, The guide rail is a threaded rod, and supports are installed at both ends of the guide rail.

3. The large-span horizontal load-bearing safety device based on cantilevered steel sections as described in claim 1, characterized in that, The transmission assembly includes: The second rotating shaft is used for power input; There are two drive threaded rods arranged left and right. The two ends of each drive threaded rod form a drive shaft and are fixed to the steel section by the corresponding fifth support. Two pulleys, both connected to the second rotating shaft, are used to transmit the power input from the second rotating shaft; There are two belts, each corresponding to one of the two pulleys and one of the two drive threaded rods. One end of the belt is fitted onto the corresponding pulley, and the other end is fitted onto the drive shaft of the corresponding drive threaded rod, for driving the corresponding drive threaded rod to rotate.

4. The large-span horizontal load-bearing safety device based on cantilevered steel sections as described in claim 1, characterized in that, The connection component includes: The component serves as an installation base and is fixedly connected to the steel profile. A rotating shaft is formed on the component; The first to third connecting members are mounted on the rotating shaft and connected to the component via corresponding springs. They can rotate around the rotating shaft under the action of the corresponding springs. The springs corresponding to the first and third connecting members are mounted on the same side, while the springs corresponding to the second connecting member are mounted on opposite sides. The first to third connecting members are provided with a horizontally penetrating first through hole and a second through hole arranged in parallel. A wedge is installed at the top of the first to third connecting members to fix the first to third connecting members, so as to ensure that the transmission assembly passes smoothly through the first through hole and the guide rail passes smoothly through the second through hole.

5. The large-span horizontal load-bearing safety device based on cantilevered steel sections as described in claim 1, characterized in that, The chain drive mechanism includes: A first rotating shaft is disposed at one end of the guide rail and is used to output the power required by the first hook assembly; Two gears are arranged at both ends of the guide rail. The gear closer to the first rotating shaft is connected to the first rotating shaft and rotates with it. A chain is connected between the two gears to form a chain drive with the two gears.

6. The large-span horizontal load-bearing safety device based on cantilevered steel sections as described in claim 5, characterized in that, The gear transmission mechanism includes: A first gear, a second gear, a third gear, and a fourth gear; the first gear meshes with the chain; the first gear also meshes with the second gear; the second gear also meshes with the third gear; the third gear also meshes with the fourth gear; and the fourth gear is connected to the brake unit via a first protrusion. A threaded ring is fitted into the braking part and connected to it via a second protrusion.

7. The large-span horizontal load-bearing safety device based on cantilevered steel sections as described in claim 6, characterized in that, The braking part is a brake disc. Multiple brake shafts are provided on one surface of the brake disc and are evenly distributed along the circumference of the brake disc. Multiple hook springs are provided on the other surface of the brake disc and are evenly distributed along the circumference of the brake disc.

8. A construction method for the large-span horizontal load-bearing safety device based on cantilevered steel sections as described in any one of claims 1-7, characterized in that, Includes the following steps: The connecting assembly is installed on top of the steel profile; The second hook assembly is installed on the lower part of the steel profile; The guide rail is attached to the transmission assembly and passes through the connecting assembly; The guide rail is driven to move horizontally to a predetermined position by the transmission component, the guide rail is locked by the connecting component, the second hook component is adjusted to a predetermined position, and the safety net is suspended on the hook of the second hook component to achieve the purpose of the safety net deployment. The first hook assembly is installed on the guide rail. The safety net is unfolded by the horizontal movement of the first hook assembly relative to the guide rail, and the safety net is retracted by the reverse movement of the first hook assembly.

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