Protective device of wall-attached lifting scaffold
By using an anti-fall pin device to reset during normal lifting and lowering to avoid interference, and to restrict rotation during descent, the problem of complex structure and safety hazards of anti-fall devices for wall-mounted lifting scaffolding is solved, achieving a safe and reliable anti-fall effect.
Patent Information
- Application Number
- CN202422927090.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-28
AI Technical Summary
The existing fall protection devices for wall-mounted lifting scaffolds are complex in structure, easily interfere with normal lifting, and pose safety hazards when falling.
The device employs a fall arrestor, which includes a base, a fall arrestor, and a reset component. The fall arrestor resets during normal lifting to avoid interference, and during descent, it restricts rotation by engaging with the fall arrestor teeth through a limiting part, thereby achieving the fall arrest effect.
Without affecting normal lifting and lowering, it can effectively prevent falling, reduce safety hazards, and has a simple structure and reliable operation.
Smart Images
Figure CN223548910U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of scaffolding fall prevention technology, and in particular to a wall-mounted lifting scaffolding protective device. Background Technology
[0002] Wall-mounted lifting scaffolding is a construction platform erected at a certain height and attached to the engineering structure. Also known as climbing scaffolding, it relies on its own lifting equipment to allow the scaffolding to rise or fall layer by layer along with the engineering structure. For construction safety, wall-mounted lifting scaffolding needs to be equipped with fall arrest devices.
[0003] In the existing technology, fall protection devices are mainly classified into the following three types: cone-type fall protection safety devices, wedge-type fall protection safety devices, and pressure plate-type fall protection safety devices.
[0004] The cone-type fall arrestor uses a cone-shaped fall arrestor. A fall arrestor line connects the lifting equipment, such as an electric hoist, to the cone-shaped fall arrestor. During a fall, the electric hoist, without load, cannot restrain the fall arrestor line, allowing the cone-shaped fall arrestor to engage with the fall arrestor teeth on the climbing frame, thus preventing a fall. The wedge-type fall arrestor replaces the cone-shaped fall arrestor with a horizontally sliding wedge connected to a steel beam. During a fall, the electric hoist, without load, engages with the wedge on the climbing frame, preventing a fall. Both of these fall arrestors require relatively complex structures to ensure the climbing frame can rise and fall normally without interfering with the fall arrestor installation. Furthermore, the electric hoist's tension must fail to trigger the fall arrestor.
[0005] The remaining type is a pressure plate type fall arrestor. The pressure plate is rotatably connected to the steel beam and held in place by a torsion spring, working in conjunction with fall arresting teeth on the scaffold to prevent falls. However, in this case, the scaffold can only rise normally; during descent, the pressure plate needs to be manually retracted to avoid interference with the scaffold, which presents a safety hazard. Therefore, minimizing interference while stably preventing falls is a pressing issue to be addressed during the use of wall-mounted lifting scaffolds. Utility Model Content
[0006] In order to reduce interference while providing a stable anti-fall effect, this application provides a wall-mounted lifting scaffolding protection device.
[0007] The wall-mounted lifting scaffolding safety device provided in this application adopts the following technical solution:
[0008] A protective device for a wall-mounted lifting scaffold includes a base for connecting to the engineering structure, a fall arrest pin rotatably mounted on the base, and a reset component. The fall arrest pin has a contact portion and a fall arrest portion on its outer edge. The reset component is mounted on the base and is used to drive the fall arrest pin to keep the contact portion facing the fall arrest tooth on the scaffold. The base has a limiting portion that restricts the rotation of the fall arrest pin when the fall arrest portion interferes with the fall arrest tooth. The time 'a' is when the fall arrest tooth disengages from the sliding path of the fall arrest tooth after the contact portion is moved. The time 'b' is when the adjacent fall arrest tooth passes through the path of the fall arrest portion when the scaffold descends at the upper limit of the safe descent speed, and a ≤ b.
[0009] By adopting the above technical solution, during normal lifting and lowering, due to the extremely slow lifting speed, the anti-fall pin can be reset in time after passing the contact part of the anti-fall tooth, avoiding interference with the anti-fall tooth and affecting the normal lifting and lowering of the scaffold. However, when a fall occurs, the falling speed will increase significantly, which will significantly reduce the reset time of the anti-fall pin. When the falling speed approaches or exceeds the safe speed, since a≤b, the anti-fall part will abut against the anti-fall tooth. At this time, the limiting part will cooperate with the restricting part to restrict the rotation of the anti-fall pin and restrict the scaffold through the anti-fall tooth, thereby achieving the purpose of preventing falls. At the same time, it can also reduce interference with the normal lifting and lowering of the scaffold, and the structure is relatively simple.
[0010] Optionally, when the anti-fall pin is in the reset state, the contact part and the anti-fall part are located on the side of the rotation center facing the anti-fall tooth, and the center of gravity of the anti-fall pin is located on the side of the rotation center facing the anti-fall tooth.
[0011] By adopting the above technical solution, after the reset component has aged, the anti-falling part on the anti-falling tooth will rotate towards the anti-falling tooth side under the gravity of the contact part and the anti-falling part, maintaining the anti-falling effect, and timely interfering with the lifting and lowering of the scaffolding to remind on-site personnel to maintain it in time.
[0012] Optionally, the anti-fall pin is provided with a limiting part, which is located on the rotation path of the limiting part when the contact part rotates downward.
[0013] By adopting the above technical solution, the rotation of the anti-fall pin can be restricted by the limiting part abutting against the limiting part.
[0014] Optionally, the reset element is a spring or an elastic cable, and both ends of the reset element are respectively connected to the base and the anti-fall pin.
[0015] By adopting the above technical solution, the anti-fall pin can be kept in the reset state without other external interference by pulling the reset component.
[0016] Optionally, the base includes a base plate for connecting the engineering structure and two parallel crossbeams, the crossbeams being fixedly connected to the base plate, the limiting part being connected to the crossbeams, and the anti-fall pin being rotatably connected to the two crossbeams.
[0017] By adopting the above technical solution, during use, the seat plate is connected to the engineering structure and extends through the crossbeam to facilitate cooperation with the scaffolding.
[0018] Optionally, the crossbeam is fixedly connected to a reinforcing side plate, which is fixedly connected to the seat plate.
[0019] By adopting the above technical solutions, reinforcing the side plates can optimize the load-bearing capacity of the crossbeams.
[0020] Optionally, the base is provided with a guide assembly for guiding the lifting and lowering of the scaffolding, the guide assembly including two sets of guide wheels rotatably connected to the base.
[0021] By adopting the above technical solution, the guide wheels can guide the scaffolding.
[0022] Optionally, a mounting plate is fixedly connected to the end of the base corresponding to the contact portion, and the mounting plate is detachably connected to two mounting seats, which are rotatably connected to guide wheels.
[0023] By adopting the above technical solution, the guide wheel can be connected to the crossbeam through the mounting base and mounting plate, which facilitates both later maintenance and installation of the guide wheel.
[0024] Optionally, the base is provided with a support assembly for supporting the scaffolding at its top, the support assembly including a support seat disposed at the top of the base and a telescopic member hinged to the support seat.
[0025] By adopting the above technical solution, during construction, the expansion joint can be used to abut against the scaffold to achieve a supporting effect. At the same time, during lifting, the support for the scaffold can be canceled simply by rotating the expansion joint relative to the support base.
[0026] Optionally, the telescopic component includes a telescopic seat hinged to the support base, a double-ended screw, and a support part for supporting the scaffold, wherein the two ends of the double-ended screw are respectively threaded to the telescopic seat and the support part.
[0027] By adopting the above technical solution, the angle of the support can be adjusted by rotating the double-ended screw rod to adapt to the matching position and height of the scaffolding, especially when there are multiple support points, thus avoiding the situation where some support points cannot be supported.
[0028] In summary, this application includes at least one of the following beneficial technical effects:
[0029] During use, due to the extremely slow lifting speed, the anti-fall pin can promptly reset after passing the contact part of the anti-fall tooth, avoiding interference with the anti-fall tooth and affecting the normal lifting and lowering of the scaffold. However, when a fall occurs, the falling speed will increase significantly, which will significantly reduce the reset time of the anti-fall pin. When the falling speed approaches or exceeds the safe speed, since a≤b, the anti-fall part will abut against the anti-fall tooth. At this time, the limiting part will cooperate with the restricting part to restrict the rotation of the anti-fall pin and restrict the scaffold through the anti-fall tooth, thereby achieving the purpose of preventing falls. At the same time, it can also reduce interference with the normal lifting and lowering of the scaffold, and the structure is relatively simple. Attached Figure Description
[0030] Figure 1 This is a structural schematic diagram of an embodiment of this application.
[0031] Figure 2 This is a cross-sectional structural diagram of an embodiment of this application.
[0032] Explanation of reference numerals in the attached drawings: 1. Base; 11. Restriction part; 12. Seat plate; 13. Crossbeam; 14. Reinforced side plate; 15. Guide assembly; 151. Guide wheel; 152. Mounting plate; 153. Mounting seat; 2. Anti-fall pin; 21. Contact part; 22. Anti-fall part; 23. Limiting part; 3. Reset part; 31. Reset rod; 4. Support assembly; 41. Support seat; 42. Telescopic part; 421. Telescopic seat; 422. Double-ended lead screw; 423. Support part; 424. Support opening. Detailed Implementation
[0033] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.
[0034] This application discloses a protective device for wall-mounted lifting scaffolding. (Refer to...) Figure 1 and Figure 2 The wall-mounted lifting scaffolding safety device includes a base 1 for connecting the engineering structure, a fall arresting pin 2, and a resetting component 3. The following explanations are provided for some terms used in the prior art: the engineering structure refers to the building exterior wall, bridge piers, or other structures that the scaffolding needs to attach to during construction; the wall-mounted lifting scaffolding is also known as scaffolding or climbing scaffolding, and it has several vertically distributed fall arresting pins fixed to it.
[0035] In this embodiment, the base 1 includes a base plate 12 for connecting the engineering structure and two parallel crossbeams 13. The crossbeams 13 are fixedly connected to the base plate 12 and are perpendicular to the base plate 12. A limiting part 11 for engaging with a fall arrestor 2 is fixedly connected between the two crossbeams 13. The fall arrestor 2 is rotatably connected to the two crossbeams 13 and located between them. Reinforcing side plates 14 are fixedly connected to the opposite sides of the two crossbeams 13. The reinforcing side plates 14 extend out of the crossbeams 13 and are fixedly connected to the base plate 12 to enhance the load-bearing capacity of the crossbeams 13.
[0036] Reference Figure 1 and Figure 2 The reset component 3 is a spring or elastic cable. One end of the reset component 3 is fixedly connected to the two crossbeams 13 or the seat plate 12 via the reset rod 31. In this embodiment, the reset rod 31 is fixedly connected to the two crossbeams 13, and the other end of the reset component 3 is fixedly connected to the anti-fall pin 2.
[0037] The outer edge of the fall arrestor pin 2 is formed with a contact portion 21, a fall arrestor portion 22, and a limiting portion 23. The contact portion 21 is used to contact the fall arrestor teeth to actuate the fall arrestor pin 2. The fall arrestor portion 22 is used to abut against the fall arrestor teeth. When the fall arrestor portion 22 abuts against the fall arrestor teeth, the limiting portion 23 abuts against the limiting portion 11 and restricts the rotation of the fall arrestor pin 2. That is, the limiting portion 11 is located on the circumferential movement path of the limiting portion 23 when the contact portion 21 rotates downward.
[0038] At the same time, when the rotation center of the reset member 3 and the anti-fall pin 2 are collinear, that is, when the anti-fall pin 2 is in the reset state, the contact part 21 is located on the side of the rotation center of the anti-fall pin 2 away from the seat plate 12 and on the lifting path of the anti-fall tooth. At this time, the anti-fall part 22 is located on the upper side of the contact part 21, so that when the contact part 21 rotates downward, the anti-fall part 22 can move toward the side of the anti-fall tooth.
[0039] Reference Figure 1 and Figure 2 The time it takes for the anti-falling tooth to disengage from the sliding path of the anti-falling tooth after the contact part 21 rotates downward is 'a'. The time it takes for the adjacent anti-falling tooth to pass through the path of the anti-falling tooth 22 when the scaffold descends at the upper limit of the safe descent speed is 'b', and a ≤ b. For example, if the upper limit of the safe descent speed is L1, the time it takes for the anti-falling tooth to pass through the path of the anti-falling tooth 22 is 'b', the normal lifting speed is L2, and the speed at which the anti-falling tooth contacts the anti-falling tooth 22 when the scaffold descends is L3. Therefore, L1 > L3 > L2. During normal lifting and lowering, the climbing frame moves very slowly, allowing sufficient time for the anti-falling pin 2 to reset. If the electric hoist fails or other reasons cause the climbing frame to fall, the anti-falling pin 2 will not have enough time to reset after the speed exceeds the safe descent speed. At this time, the anti-falling part 22 will be in a position that interferes with the anti-falling tooth. The anti-falling part 22 will abut against the anti-falling tooth, and at the same time, the limiting part 11 will abut against the limiting part 23, thereby achieving the effect of preventing a fall.
[0040] Furthermore, when the fall arrestor pin 2 is in the reset state, the contact part 21 and the fall arrestor part 22 are located on the side of the rotation center facing the fall arrestor tooth, so that the center of gravity of the fall arrestor pin 2 is located on the side of the rotation center facing the fall arrestor tooth. At this time, even if the reset member 3 fails, the fall arrestor pin 2 can still rotate towards the fall arrestor tooth under the gravity of the fall arrestor part 22 and the contact part 21, which can promptly interfere with the use of the climbing frame, maintain the fall arrest effect, and reduce safety hazards.
[0041] Reference Figure 1 and Figure 2 To optimize the guiding effect, guide components 15 are provided at the ends of the two crossbeams 13 away from the seat plate 12 to guide the scaffolding. The guide components 15 include two sets of guide wheels 151. Mounting plates 152 are fixedly connected to the ends of the two crossbeams 13 away from the seat plate 12, and the mounting plates 152 are bolted to two mounting seats 153. The two sets of guide wheels 151 are rotatably connected to the outer walls of the two mounting seats 153 on opposite sides, and each set of guide wheels 151 includes at least two guide wheels 151 for rolling cooperation with the scaffolding and providing guidance.
[0042] Finally, in order to maintain the support of the scaffolding during construction, support components 4 are provided at the top of the two crossbeams 13.
[0043] The support assembly 4 includes a support base 41 and a telescopic member 42. The support base 41 is fixedly connected to the top surface of the two crossbeams 13. The telescopic member 42 includes a telescopic seat 421 hinged to the support base 41, a double-ended screw 422, and a support part 423 for supporting the scaffold. The double-ended screw 422 is a rod with opposite threads at both ends. The two ends of the double-ended screw 422 are respectively threaded to the telescopic seat 421 and the support part 423, and the end of the support part 423 away from the telescopic seat 421 has a support opening 424 to facilitate contact with the scaffold and provide support for the scaffold.
[0044] The implementation principle of this application embodiment is as follows: During normal lifting and lowering, the anti-fall pin 2 can be reset in time after being moved by the anti-fall tooth, avoiding interference with the anti-fall tooth and affecting the normal lifting and lowering of the scaffold; however, when a fall occurs, the falling speed will increase significantly, which will significantly reduce the reset time of the anti-fall pin 2. When the falling speed approaches or exceeds the safe speed, the anti-fall part 22 will abut against the anti-fall tooth. At this time, the limiting part 23 will cooperate with the limiting part 11 to limit the rotation of the anti-fall pin 2 and play a limiting role on the scaffold through the anti-fall tooth, thereby achieving the purpose of preventing falls. At the same time, it can also reduce interference with the normal lifting and lowering of the scaffold, and the structure is relatively simple.
[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A protective device for wall-mounted lifting scaffolding, characterized in that: It includes a base (1) for connecting the engineering structure, a fall arresting pin (2) rotatably mounted on the base (1), and a reset member (3); The outer edge of the anti-fall pin (2) is provided with a contact part (21) and an anti-fall part (22); The reset member (3) is disposed on the base (1). The reset member (3) is used to drive the anti-fall pin (2) to keep the contact part (21) facing the anti-fall tooth on the scaffold. The base (1) is provided with a limiting part (11) that restricts the rotation of the anti-fall pin (2) when the anti-fall part (22) interferes with the anti-fall tooth. The time when the anti-fall part (22) leaves the sliding path of the anti-fall tooth after the anti-fall tooth moves the contact part (21) is a. The time when the scaffold descends at the upper limit of the safe descent speed is b. The time when the adjacent anti-fall tooth passes through the path of the anti-fall part (22) is b.
2. The wall-mounted lifting scaffolding protection device according to claim 1, characterized in that: When the anti-fall pin (2) is in the reset state, the contact part (21) and the anti-fall part (22) are located on the side of the rotation center facing the anti-fall tooth, and the center of gravity of the anti-fall pin (2) is located on the side of the rotation center facing the anti-fall tooth.
3. The wall-mounted lifting scaffolding protection device according to claim 1, characterized in that: The anti-fall pin (2) is provided with a limiting part (23), and the limiting part (11) is located on the rotation path of the limiting part (23) when the contact part (21) rotates downward.
4. The wall-mounted lifting scaffolding protection device according to claim 1, characterized in that: The reset component (3) is a spring or elastic cable, and the two ends of the reset component (3) are respectively connected to the base (1) and the anti-fall pin (2).
5. The wall-mounted lifting scaffolding protection device according to any one of claims 1-4, characterized in that: The base (1) includes a base plate (12) for connecting the engineering structure and two parallel crossbeams (13). The crossbeams (13) are fixedly connected to the base plate (12), the limiting part (11) is connected to the crossbeams (13), and the anti-fall pin (2) is rotatably connected to the two crossbeams (13).
6. The wall-mounted lifting scaffolding protection device according to claim 5, characterized in that: The crossbeam (13) is fixedly connected to a reinforcing side plate (14), which is fixedly connected to the seat plate (12).
7. The wall-mounted lifting scaffolding protection device according to any one of claims 1-4, characterized in that: The base (1) is provided with a guide assembly (15) for guiding the lifting and lowering of the scaffolding. The guide assembly (15) includes two sets of guide wheels (151) rotatably connected to the base (1).
8. The wall-mounted lifting scaffolding protection device according to claim 7, characterized in that: The base (1) is fixedly connected to the end of the contact part (21) with a mounting plate (152). The mounting plate (152) is detachably connected to two mounting seats (153). The mounting seats (153) are rotatably connected to the guide wheel (151).
9. The wall-mounted lifting scaffolding protection device according to any one of claims 1-4, characterized in that: The base (1) is provided with a support assembly (4) for supporting the scaffold. The support assembly (4) includes a support seat (41) provided on the top of the base (1) and a telescopic member (42) hinged to the support seat (41).
10. The wall-mounted lifting scaffolding protection device according to claim 9, characterized in that: The telescopic component (42) includes a telescopic seat (421) hinged to the support seat (41), a double-ended screw (422), and a support part (423) for supporting the scaffold. The two ends of the double-ended screw (422) are respectively threaded to the telescopic seat (421) and the support part (423).