Spring triggered fall arrest safety device

Abstract

This invention provides a spring-triggered fall arrest safety device, comprising an annular housing and a fall arrest locking device. The annular housing is formed by connecting multiple arc-shaped housings with bolts. The fall arrest locking devices are evenly distributed on the annular housing. The annular housing is mounted on the object to be prevented from falling. When the object to be prevented is normally raised and lowered, the fall arrest locking device is in an unlocked state, allowing the object to drive the annular housing and the fall arrest locking device to rise and fall normally. When the object to be prevented accidentally falls, the fall arrest locking device can be locked, preventing the annular housing and the object to be prevented from falling further. The spring-triggered fall arrest safety device of this invention is compact, safe, reliable, and easy to operate.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a spring-triggered fall prevention safety device for the construction of cylindrical pier bridges. Background Technology

[0002] In bridge design, column piers are a commonly used structural type. For simply supported bridges, the cap beam is a crucial component that connects the superstructure and the substructure. The load of the superstructure is transferred to the substructure and foundation through the cap beam, making it one of the main load-bearing structures. In short, the cap beam refers to the horizontal beam installed on top of the pier to support, distribute, and transfer the load of the superstructure; it is also called a cap beam.

[0003] In existing technologies, the most common construction methods for bridge cap beams include the transverse steel bar method, the corbel bracket method, the ground support method, and the traditional clamp method.

[0004] In recent years, a device has been developed that can erect temporary support structures for cap beams, such as supporting main beams, distribution beams, cap beam bottom formwork, and cap beam construction work platforms, at a low altitude. Then, using a related lifting device, these temporary support structures can be lifted together to the construction work position at a higher altitude. This not only overcomes the shortcomings of existing cap beam construction methods but also greatly improves construction efficiency, reduces the risks of working at height, and ensures the personal safety of construction workers.

[0005] However, existing climbing formwork and other lifting devices rely on the friction of clamping clamps to bear vertical loads, thus posing a safety hazard of accidental falls. The market urgently needs a safe and reliable fall arrest device to prevent such devices from falling further after a certain distance or when their speed reaches a certain limit, thus preventing related accidents. Summary of the Invention

[0006] To address the problems in the prior art, the present invention provides a compact, safe and reliable spring-triggered fall protection device.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a spring-triggered fall arrest safety device includes an annular housing and a fall arrest locking device; the annular housing is formed by connecting multiple arc-shaped housings with bolts; the fall arrest locking devices are evenly distributed on the annular housing; the annular housing is installed on the object to be prevented from falling; when the object to be prevented from falling normally rises and falls, the fall arrest locking device is in the unlocked state, and the object to be prevented from falling can drive the annular housing and the fall arrest locking device to rise and fall normally; when the object to be prevented from falling accidentally falls, the fall arrest locking device can be in the locked state, preventing the annular housing and the object to be prevented from falling further.

[0008] In a preferred embodiment, the spring-triggered fall protection device further includes a suspension device, and the annular box is suspended on the object to be protected from falling via the suspension device.

[0009] In a preferred embodiment, the suspension device includes a first mounting base, a second mounting base, a bolt, a chain, a chain connector, a first pin assembly, and two second pin assemblies. The first mounting base is fixed to the annular housing, and the second mounting base is fixed to the object to be dropped. One end of the chain is connected to the second mounting base via the first pin assembly, and the other end of the chain is connected to one end of the chain connector via one of the second pin assemblies. The other end of the chain connector is connected to the eyelet end of the bolt via the other second pin assembly, and the threaded end of the bolt is fixedly connected to the first mounting base via a nut.

[0010] In a preferred embodiment, the annular box is further equipped with an upper guide wheel and a lower guide wheel.

[0011] In a preferred embodiment, the fall arrestor locking device includes an upper wedge block and a lower wedge block; the upper wedge block is detachably mounted on the annular housing, and the lower wedge block is suspended on the annular housing by a tension spring; the upper wedge block has a downward wedge surface, and the lower wedge block has an upward wedge surface, with the downward wedge surface of the upper wedge block contacting the upward wedge surface of the lower wedge block; when the object to be prevented from falling accidentally falls, the lower wedge block moves upward and horizontally relative to the upper wedge block, which locks the fall arrestor locking device in a locked state, preventing the annular housing and the object to be prevented from falling further.

[0012] In a preferred embodiment, the fall arrestor includes a disc spring cylinder, a door frame, an upper wedge block, and a lower wedge block. The piston end of the disc spring cylinder is hinged to the annular housing, and the cylinder body end of the disc spring cylinder is hinged to the door frame. The upper wedge block is detachably mounted on the cylinder body end of the disc spring cylinder, and the lower wedge block is suspended on the door frame by a tension spring. The upper wedge block has a downward wedge surface, and the lower wedge block has an upward wedge surface, with the downward wedge surface of the upper wedge block contacting the upward wedge surface of the lower wedge block. When the object to be prevented from falling accidentally falls, the lower wedge block moves upward and horizontally relative to the upper wedge block, locking the fall arrestor and preventing the annular housing and the object to be prevented from falling further.

[0013] In a preferred embodiment, the anti-fall locking device further includes a pressure plate with a raised edge; the pressure plate is connected to the upper wedge block by screws, and the upper wedge block is mounted on the cylinder end of the disc spring cylinder by the raised edge on the pressure plate.

[0014] In a preferred embodiment, the anti-fall locking device further includes a guide plate, which is L-shaped; guide grooves are provided on both sides of the lower wedge block; the guide plate is fixed to both sides of the upper wedge block by a first bolt assembly, and the L-shaped guide plate cooperates with the guide grooves on both sides of the lower wedge block to guide the lower wedge block when it slides relative to the upper wedge block.

[0015] In a preferred embodiment, the anti-fall locking device further includes a needle roller array; a groove is formed on the downward-facing wedge surface of the upper wedge block; the needle roller array is installed in the groove on the downward-facing wedge surface of the upper wedge block and rolls in contact with the upward-facing wedge surface of the lower wedge block.

[0016] In a preferred embodiment, a friction block can be detachably mounted on the lower wedge block.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The spring-triggered fall protection device of the present invention is compact, safe, reliable and easy to operate.

[0019] 2. The spring-triggered fall protection safety device of the present invention has an easy-to-operate fall protection locking device, which is relatively reliable in locking or unlocking and convenient to operate.

[0020] 3. The spring-triggered fall protection device of the present invention does not affect the normal up-and-down movement of the fall protection component. It will only be triggered and locked when an accidental weightlessness and fall occurs, and can be unlocked as long as the fall protection component moves normally upward.

[0021] 4. The lower wedge block of the present invention can be guided by the guide plate. In a weightless state, the lower wedge block can slide along the guide plate, triggering the lower wedge block and the upper wedge block to move closer to each other, so that the lower wedge block moves horizontally and locks the anti-fall device.

[0022] 5. The present invention integrates a disc spring cylinder, which can achieve buffering and avoid excessive impact force that could cause structural damage.

[0023] 6. This invention integrates multiple guide wheels to ensure the safety and reliability of the overall equipment during its up-and-down movement, avoid malfunctions, and improve the reliability of the entire device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the spring-triggered fall protection device of the present invention installed on a pier.

[0025] Figure 2 This is an exploded view of the structure of the spring-triggered fall protection safety device of the present invention.

[0026] Figure 3This is a schematic diagram of the installation structure of the arc-shaped box and the anti-fall locking device.

[0027] Figure 4 This is an exploded view of the arc-shaped box and the anti-fall locking device.

[0028] Figure 5 This is a schematic diagram of the suspension device.

[0029] Figure 6 This is a front view schematic diagram of the anti-fall locking device of the present invention.

[0030] Figure 7 This is a top view of the anti-fall locking device of the present invention.

[0031] Figure 8 for Figure 6 Schematic sectional view along the middle BB direction.

[0032] Figure 9 for Figure 8 Enlarged schematic diagram of part I in the middle.

[0033] Figure 10 for Figure 7 Schematic sectional view along the AA direction.

[0034] Figure 11 This is a cross-sectional schematic diagram of the disc spring cylinder in this invention.

[0035] Figure 12 This is a three-dimensional structural diagram of the upper wedge block from one perspective in this invention.

[0036] Figure 13 This is a three-dimensional structural diagram of the upper wedge block from another perspective in this invention.

[0037] Figure 14 This is a three-dimensional structural diagram of the lower wedge block in this invention.

[0038] Figure 15 This is a front view schematic diagram of the lower wedge block in this invention.

[0039] Figure 16 for Figure 15 Cross-sectional view along the CC direction.

[0040] Figure 17 This is a schematic diagram of the installation structure between the door frame and the upper and lower wedge block assemblies.

[0041] Figure 18 This is a schematic diagram showing the exploded structure between the door frame and the upper and lower wedge block components.

[0042] Figure 19 This is a schematic diagram of the anti-fall locking device under normal working conditions of the present invention.

[0043] Figure 20 This is a schematic diagram of the initial trigger state of the anti-fall locking device of the present invention.

[0044] Figure 21 This is a schematic diagram of the state during the triggering process of the anti-fall locking device of the present invention.

[0045] Figure 22 This is a schematic diagram of the anti-fall locking device of the present invention in the triggered locking state. Detailed Implementation

[0046] Reference Figures 1 to 22 An embodiment of a spring-triggered fall protection safety device of the present invention is further described below.

[0047] A spring-triggered fall arrestor includes an annular housing 1 and a fall arrestor locking device 7. The annular housing 1 is formed by connecting multiple arc-shaped housings 6 together with bolts 3 to form a whole; the spring-triggered fall arrestor is suspended on a climbing device 4 (i.e. the part to be prevented from falling) by a suspension device 2, and the spring-triggered fall arrestor is driven by the climbing device 4 to move up and down along the pier 5.

[0048] The fall arrestor locking devices 7 are evenly distributed on the annular housing 1, which is also equipped with multiple upper guide wheels 8 and lower guide wheels 9. The evenly distributed multiple sets of fall arrestor locking devices 7 can ensure that the spring-triggered fall arrestor safety device is subjected to balanced force, improving braking capability. The integration of multiple sets of upper guide wheels 8 and lower guide wheels 9 can ensure that the spring-triggered fall arrestor safety device remains centered with the pier 5 during up and down movement, enhancing operational stability and reducing the occurrence of malfunctions.

[0049] The suspension device 2 comprises a first mounting base 2.1, a fisheye bolt 2.2, a nut 2.3, a chain connector 2.4, a chain 2.5, a second mounting base 2.6, a first pin assembly 2.7, and a second pin assembly 2.8. The first mounting base 2.1 is fixed to the arc-shaped housing 6 of the spring-triggered fall arrestor, and the second mounting base 2.6 is fixed to the climbing device 4. The distance between the first mounting base 2.1 and the second mounting base 2.6 can be adjusted by the fisheye bolt 2.2. The spring-triggered fall arrestor can be distributed with multiple sets of suspension devices 2. By adjusting the fisheye bolt 2.2, the spring-triggered fall arrestor can be leveled to ensure the stability of its up-and-down movement.

[0050] The fall arrestor locking device 7 includes an adjustable lug 7.1, an adjusting shim 7.2, a pin assembly 7.3, a disc spring cylinder 7.4, a tension spring 7.5, a door frame 7.6, a pressure plate 7.7, an upper wedge block 7.8, a needle roller assembly 7.9, a lower wedge block assembly 7.10, a guide plate 7.11, a first bolt assembly 7.12, and a second bolt assembly 7.13. A fixed lug 6.1 is designed on the arc-shaped housing 6. The adjustable lug 7.1 and the fixed lug 6.1 are connected by the second bolt assembly 7.13. The relative position between the fall arrestor locking device 7 and the pier 5 can be adjusted by adding or removing the adjusting shim 7.2, so that the lower wedge block assembly 7.10 and the pier 5 form the optimal initial gap S.

[0051] The disc spring cylinder 7.4.5 has two trunnions 7.4.5.1, which contact the slide groove 7.6.1 at the door frame 7.6 through the trunnions 7.4.5.1, providing support and guidance for the disc spring cylinder 7.4. Multiple disc springs 7.4.4 are installed between the piston rod 7.4.1 and the cylinder 7.4.5, providing elastic cushioning.

[0052] The piston rod 7.4.1 of the disc spring cylinder 7.4 is equipped with a spherical bearing 7.4.2, which is connected to the adjustable lug 7.1 via a pin assembly 7.3. The right end of the cylinder 7.4.5 of the disc spring cylinder is a spherical surface 7.4.6 (the upper wedge block 7.8 has an arc-shaped surface 7.8.3 that mates with the spherical surface 7.4.6). The upper wedge block 7.8 is connected to the cylinder 7.4.5 of the disc spring cylinder via a pressure plate 7.7, so that the disc spring cylinder 7.4 and the upper wedge block 7.8 form a ball joint connection. Furthermore, the top of the upper wedge block 7.8 is an arc-shaped surface 7.8.1, which makes line contact with the door frame 7.6, allowing the upper wedge block 7.8 to adapt to the elastic deformation caused by the load on the spring-triggered fall arrest safety device housing, thereby ensuring effective contact between the lower wedge block assembly 7.10 and the pier 5 and preventing damage to the surface of the pier 5.

[0053] The lower wedge block assembly 7.10 includes a lower wedge block 7.10.1, a friction block 7.10.2, a fastening screw 7.10.3, and a spring hook 7.10.4. The friction block 7.10.2 is fixed to the lower wedge block 7.10.1 by the fastening screw 7.10.3. In actual use, the friction block 7.10.2 needs to come into contact with the pier 5 and is a vulnerable part. It can be detached by the fastening screw 7.10.3 for easy replacement.

[0054] The upper wedge block 7.8 and the lower wedge block assembly 7.10 are guided and connected by a guide plate 7.11. The lower wedge block 7.8 can slide relative to the upper wedge block 7.8 along the guide plate 7.11. The lower wedge block 7.10.1 is designed with a guide groove 7.10.1.1. The guide plate 7.11 is designed as an L-shape and is fixed to both sides of the upper wedge block 7.8 by the first bolt assembly 7.12, extending into the guide groove of the lower wedge block 7.10.1 to guide and limit the movement of the lower wedge block 7.10.1. The upper wedge block 7.8 has a downward wedge-shaped surface, and the lower wedge block 7.10.1 has an upward wedge-shaped surface. The downward wedge-shaped surface of the upper wedge block 7.8 and the upward wedge-shaped surface of the lower wedge block 7.10.1 are in contact. The downward wedge-shaped surface of the upper wedge block 7.8 has a groove 7.8.2, and a needle roller row 7.9 is installed in the groove 7.8.2. The downward wedge-shaped surface of the upper wedge block 7.8 and the upward wedge-shaped surface of the lower wedge block 7.10.1 are in contact through the needle roller row 7.9, which can change sliding friction into rolling friction. This can reduce the coefficient of friction between the upper wedge block 7.8 and the lower wedge block 7.10.1 when they move along the inclined plane, and make the self-locking performance of the anti-fall locking device 7 more reliable.

[0055] Tension springs 7.5 are installed on both sides of the lower wedge block 7.10.1. One end of the tension spring 7.5 is fixed to the spring hook 7.10.4 of the lower wedge block assembly 7.10, and the other end of the tension spring 7.5 is fixed to the door frame 7.6. When a weightlessness and fall occur, the lower wedge block assembly 7.10 will move relative to the upper wedge block 7.8 along the guide plate 7.11 under the action of the tension spring 7.5. Since the upper wedge block 7.8 and the lower wedge block 7.10.1 have matching wedge surfaces and are in inclined contact, there will be a horizontal displacement when they move relative to each other. This will cause the lower wedge block assembly 7.10 to contact the pier 5, triggering the fall arrest locking action. The climbing device 4 will stop and lock its position through the inclined self-locking to prevent further sliding and provide effective fall protection.

[0056] The working process of the fall arrestor locking device 7 is as follows: Figure 19 As shown, under normal operating conditions, the lower wedge block assembly 7.10 rests on the bottom of the door frame 7.6 under its own weight, and the initial gap between the lower wedge block assembly 7.10 and the pier 5 is S. When the crawler 4 accidentally falls, as... Figure 20 As shown, the initial triggering process state one is the instant of weightlessness. Under the action of the tension spring 7.5, the lower wedge block assembly 7.10 begins to retract relative to the upper wedge block 7.8, with a relative movement stroke of H1. The gap between the lower wedge block assembly 7.10 and the pier 5 decreases to S1. Figure 21As shown, during the triggering process, state two indicates that the lower wedge block assembly 7.10 contacts the pier 5, triggering the anti-fall locking device 7 to begin braking. At this time, the lower wedge block 7.10.1 relative to the upper wedge block 7.8 experiences a relative movement stroke increasing to H2. Figure 22 As shown, when the locking is triggered, the third locking state is the maximum braking force state. The lower wedge block assembly 7.10 moves to the upper limit of the door frame 7.6, and the relative movement stroke of the lower wedge block 7.10.1 relative to the upper wedge block 7.8 increases to H3. At this time, the disc spring of the disc spring cylinder 7.4 is compressed to a certain extent, and the compression stroke is T1. In this state, the anti-fall locking device 7 will play the maximum braking force. The lower wedge block 7.10.1 and the upper wedge block 7.8 form a wedge self-locking, which can effectively lock the load on the pier 5.

[0057] After the anti-fall locking device 7 is locked, if unlocking is required, the climbing device 4 can drive the spring-triggered anti-fall safety device to work normally upward, so that the upper wedge block 7.8 and the lower wedge block 7.10.1 are separated. The lower wedge block assembly 7.10 will return to its initial position under its own weight, thus realizing the unlocking action.

[0058] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. It should be noted that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spring-triggered fall protection device, characterized in that: It includes an annular housing and a fall arrestor locking device; the annular housing is composed of multiple arc-shaped housings connected by bolts; the fall arrestor locking devices are evenly distributed on the annular housing; the annular housing is suspended on the object to be prevented from falling by a suspension device; the fall arrestor locking device includes a disc spring cylinder, a door frame, an upper wedge block, and a lower wedge block; the piston end of the disc spring cylinder is hinged to the annular housing, and the cylinder body end of the disc spring cylinder is hinged to the door frame; the upper wedge block is detachably mounted on the cylinder body end of the disc spring cylinder, and the lower wedge block is suspended on the door frame by a tension spring; the upper wedge block has a downward wedge surface, the lower wedge block has an upward wedge surface, and the downward wedge surface of the upper wedge block contacts the upward wedge surface of the lower wedge block; when the object to be prevented from falling... When the fall arrestor accidentally falls, the lower wedge block moves upward and horizontally relative to the upper wedge block, locking the fall arrestor locking device and preventing the annular box and the fall arrestor from falling further. The fall arrestor locking device also includes a pressure plate with a raised edge. The pressure plate is connected to the upper wedge block by screws, and the upper wedge block is hung on the cylinder end of the disc spring cylinder by the raised edge on the pressure plate. The fall arrestor locking device also includes a guide plate, which is L-shaped. Guide grooves are opened on both sides of the lower wedge block. The guide plate is fixed to both sides of the upper wedge block by a first bolt assembly, and the L-shaped guide plate cooperates with the guide grooves on both sides of the lower wedge block to guide the lower wedge block when it slides relative to the upper wedge block.

2. The spring-triggered fall arrestor according to claim 1, characterized in that: The suspension device includes a first mounting base, a second mounting base, a bolt, a chain, a chain connector, a first pin assembly, and two second pin assemblies. The first mounting base is fixed to the annular housing, and the second mounting base is fixed to the object to be dropped. One end of the chain is connected to the second mounting base via the first pin assembly, and the other end of the chain is connected to one end of the chain connector via one of the second pin assemblies. The other end of the chain connector is connected to the eyelet end of the bolt via the other second pin assembly. The threaded end of the bolt is fixedly connected to the first mounting base via a nut.

3. The spring-triggered fall arrestor according to claim 1, characterized in that: The annular box is also equipped with an upper guide wheel and a lower guide wheel.

4. The spring-triggered fall arrestor according to claim 1, characterized in that: The anti-fall locking device also includes a needle roller array; a groove is formed on the downward-facing wedge surface of the upper wedge block; the needle roller array is installed in the groove on the downward-facing wedge surface of the upper wedge block and rolls in contact with the upward-facing wedge surface of the lower wedge block.

5. A spring-triggered fall arrest safety device according to claim 4, characterized in that: A friction block can also be detachably installed on the lower wedge block.

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