Horizontal protection device between main structure outer wall and peripheral ring beam

Abstract

The utility model discloses a horizontal protection device between an outer wall of a main structure and a peripheral ring beam, which comprises a pair of supporting pieces, a pair of connecting pieces, a pair of connecting pieces, a pair of connecting pieces and a pair of connecting pieces, and is characterized in that one end of each supporting piece is of an inverted U-shaped structure for clamping the peripheral ring beam; the protection assembly is arranged in a space between the main body structure outer wall and the peripheral ring beam and comprises a fixed protection part which is fixedly arranged on the upper end face of the other end of the supporting piece and is relatively close to one side of the peripheral ring beam; the movable protection part is arranged on the upper end face of the other end of the supporting piece, relatively close to one side of the main body structure outer wall and movably coupled with the fixed protection part. According to the technical scheme, on the basis that the safety of constructors is guaranteed, the problems that an existing protection device is inconvenient to assemble and disassemble and the aluminum mold K plate is inconvenient to disassemble are solved, the technical effects that assembling and disassembling are convenient, the turnover efficiency is improved, meanwhile, it can be guaranteed that the aluminum mold K plate is convenient to disassemble, and the like are achieved. Finally, the purposes of fully guaranteeing the safety of constructors, improving the construction efficiency and reducing the construction cost are achieved.

Description

Technical Field

[0001] The utility model application belongs to the technical field of construction protection of the outer ring beam of the outer wall of a high-rise building, and specifically relates to a horizontal protection device between the outer wall of a main structure and the outer ring beam. Background Art

[0002] With the rapid development of society, and to meet the people's growing material and cultural needs, the appearance of high-rise buildings has gradually shifted from single-function residential designs to specialized designs that combine practicality and aesthetics. This includes the construction of corresponding peripheral ring beams on the exterior walls of the main structure. The design of the peripheral ring beams is not only for aesthetic value, but also includes air conditioning panels for outdoor air conditioners between the peripheral ring beams and the main structure's exterior walls.

[0003] However, this design presented certain safety issues during construction: in order to save materials and reduce costs, the construction workers did not horizontally lay all the air-conditioning panels between the main exterior wall of the structure and the outer ring beam. Instead, they built several air-conditioning panels in a staggered manner between the two. That is, there were still horizontal gaps between the air-conditioning panels, which posed a threat to the safety of construction workers walking by during construction.

[0004] In the existing technology, the following two solutions are usually used to solve this problem:

[0005] ①Use steel pipes to build the base and cover it with mesh for protection

[0006] When using steel pipes and mesh for protection, a protective platform must be built on each layer of steel pipes, covered with steel fence mesh on top, and repeatedly assembled and disassembled for use as the main structure construction progresses. The disadvantages of this method are that the construction speed is slow, a large number of steel pipe fasteners are required, a lot of manpower is wasted, and the process connection must be very timely. At the same time, the aluminum formwork K plate below must be dismantled during the construction process, as shown in the attached figure. Figure 4 As shown, due to the position of the aluminum formwork K-plate, a certain amount of space needs to be left when it is dismantled, and the steel mesh must be moved as a whole at that time, which is very inconvenient and this solution is not easy to implement.

[0007] ② Use climbing frame and extended flap for protection

[0008] An extended flap is installed on the outer climbing frame of the outer ring beam for protection. This is usually manufactured by a professional climbing frame rental company, and the opening can be fully protected. The disadvantage of this method is that it is expensive. At the same time, when the climbing frame needs to be raised, the extended flap needs to be fully flipped back and forth. Moreover, when the extended flap is flipped back and forth, it is easy to conflict with the aluminum formwork support poles of the outer ring beam. After the extended flap is fully retracted, a large number of hollow spaces will be formed, which still poses a safety hazard. Therefore, this solution is not easy to implement.

[0009] To sum up, it is urgent to design a new horizontal protection device, which can completely prevent the occurrence of danger. On the basis of fully ensuring the safety of construction workers, it can also solve the problems of inconvenient installation and disassembly of existing protection devices and inconvenient disassembly of aluminum formwork K plates, and achieve the technical effects of convenient installation and disassembly of protection devices, improved turnover efficiency, easy disassembly of aluminum formwork K plates, and effective avoidance of conflicts with aluminum formwork support poles, and ultimately achieve the purpose of fully ensuring the safety of construction workers, improving construction efficiency, and reducing construction costs. Utility Model Content

[0010] The utility model discloses a horizontal protection device between the outer wall of a main structure and the outer ring beam, so as to solve the problems existing in the above-mentioned prior art.

[0011] To achieve the above-mentioned purpose, the utility model provides a horizontal protective device between the outer wall of the main structure and the outer ring beam, a pair of support members, one end of each support member is an inverted U-shaped structure for clamping the outer ring beam, and the other end is used for support; a protective assembly is used to be arranged in the gap between the outer wall of the main structure and the outer ring beam, including: a fixed protective part, fixedly mounted on the upper end surface of the other end of each support member and relatively close to the side of the outer ring beam, for protection; a movable protective part, arranged on the upper end surface of the other end of each support member and relatively close to the side of the outer wall of the main structure, and movably coupled to the fixed protective part, and the movable protective part can form a space for disassembling temporary components in the retracted state.

[0012] Furthermore, each of the support members includes: a movable clamping arm, which is an inverted L-shaped structure, and a plurality of distance adjustment holes are formed at intervals on the side of the horizontal end of the movable clamping arm; a connecting clamping arm, which is a T-shaped structure, and one end of the connecting clamping arm is slidably inserted into the horizontal end of the movable clamping arm, and a through hole corresponding to the plurality of distance adjustment holes is formed on the side, and the upper end surface of the other end of the connecting clamping arm is fixed with the fixed protective part.

[0013] Furthermore, a diagonal support tube is fixedly mounted on the connecting clamp arm.

[0014] Furthermore, a buffer pad is provided on the inner side wall of the movable clamping arm and / or the connecting clamping arm.

[0015] Furthermore, the movable protective part is connected to the fixed protective part through a hinge, and the direction of the hinge axis is a horizontal direction parallel to the outer ring beam, and the movable protective part can be flipped toward the outer ring beam along the hinge axis.

[0016] Furthermore, both the fixed protective portion and the movable protective portion are rectangular frame structures, and the hollow parts of the rectangular frame structures are covered with steel mesh.

[0017] Furthermore, the movable clamping arm, the connecting clamping arm, and the rectangular frames of the fixed protective part and the movable protective part are all composed of square tubes.

[0018] Furthermore, the movable clamping arm, the connecting clamping arm, the fixed protective part and the movable protective part are all made of galvanized steel pipes.

[0019] Furthermore, the interior of the fixed protective part is a rectangular groove structure, and one side end face is provided with an opening connected to the groove structure, and the opening and the rectangular groove structure form a slide groove; the movable protective part is partially slidably inserted in the slide groove, and the movable protective part can slide along the slide groove toward or away from the outer wall of the main structure, and a limiting through hole is provided on the outer end portion of the movable protective part; a limiting hole matching the limiting through hole is provided on the outer end portion of the connecting clamp arm.

[0020] Furthermore, a handle is provided at the outer end of the movable protective portion.

[0021] The advantages and positive effects of the utility model are:

[0022] 1. The horizontal protection device disclosed in the present utility model is provided with a pair of support members, one end of which is an inverted U-shaped structure for clamping the peripheral ring beam, and the other end is used to support the protection assembly installed on the upper end. When in use, the protection assembly will completely cover the space between the outer wall of the main structure and the peripheral ring beam, filling the horizontal gap between the air conditioning panels and eliminating the safety hazard posed by the horizontal gap to construction workers during construction. In addition, the fixed protection part and the movable protection part included in the protection assembly are movably coupled. The movable protection part can reciprocate relative to the fixed protection part at any time, so that the protection assembly can be freely switched between an expanded state and a retracted state. The expanded state of the protection assembly is the state when in use, and in the retracted state, a certain amount of space can be left. This space can be used by construction workers to remove temporary components on the outer wall of the main structure, thereby solving the problem of horizontal protection between the outer wall of the main structure and the peripheral ring beam in high-rise buildings and the inconvenient removal of aluminum formwork K-plates during construction. The structure is simple, easy to manufacture, and easy to operate.

[0023] This solution solves the problems of inconvenient installation and disassembly of existing protective devices and inconvenient disassembly of aluminum formwork K-plates on the basis of fully ensuring the safety of construction workers. This protective device achieves the technical effect of convenient installation and disassembly, improving turnover efficiency, and facilitating the disassembly of aluminum formwork K-plates and effectively avoiding conflicts with aluminum formwork support poles, ultimately achieving the goal of fully ensuring the safety of construction workers, improving construction efficiency, and reducing construction costs.

[0024] 2. The horizontal protection device disclosed in the utility model application is designed with a split structure in which the support member can clamp peripheral ring beams of different thicknesses. This also allows the device to be used in buildings of different specifications, sizes, and types, thereby expanding the scope of use of the protection device.

[0025] 3. The horizontal protection device disclosed in the utility model application has a buffer pad on the inner side wall of the movable clamping arm and the connecting clamping arm, which can reduce the wear of the movable clamping arm and the connecting clamping arm on the outer ring beam.

[0026] 4. The horizontal protection device disclosed in the utility model application, the movable clamping arm, the connecting clamping arm, the fixed protection part and the movable protection part are all made of galvanized material. The galvanized material has strong corrosion resistance and high rigidity, which can not only effectively extend the service life of the device, but also further improve the safety of the protection device.

[0027] 5. The horizontal protection device disclosed in the utility model application has a hinge connection between the fixed protection part and the movable protection part. When in use, it is only necessary to directly flip the movable protection part. This design is convenient for operators to operate at the construction site.

[0028] 6. The horizontal protection device disclosed in the utility model application has a plug-in connection method between the fixed protection part and the movable protection part. When in use, it is only necessary to directly insert / unplug the movable protection part and the fixed protection part. This design is convenient for operators to operate at the construction site and also saves occupied space.

[0029] 7. The technical solution disclosed in the utility model application has the advantages of safety and reliability, simple structure, improved efficiency, reduced cost, firm connection, wide range of applications, durability, simple operation and easy production. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is an operational diagram of an embodiment of the horizontal protection device provided by the utility model;

[0031] Figure 2 yes Figure 1 A perspective view of the mid-level guard;

[0032] Figure 3 yes Figure 1 Schematic diagram of the structure of the protection components of the medium horizontal protection device;

[0033] Figure 4 This is a schematic diagram of the operation of another embodiment of the horizontal protection device provided by the utility model;

[0034] Figure 5 yes Figure 4 A perspective view of the mid-level guard;

[0035] Figure 6 yes Figure 4 A schematic diagram of the structure of the fixed guard portion of the guard assembly of the medium horizontal guard device;

[0036] Figure 7 yes Figure 4A front view of the movable guard portion of the guard assembly of the middle horizontal guard;

[0037] Figure 8 It is a three-dimensional diagram of the support member in the horizontal protection device provided by the utility model.

[0038] Description of Reference Numerals

[0039] 1. Support member; 101. Movable clamping arm; 101a. Adjustable distance hole; 102. Connecting clamping arm; 102a. Through hole; 102b. Limit hole; 103. Diagonal bracing tube; 201. Fixed protective part; 201a. Slide groove; 202. Movable protective part; 202a. Limit through hole; 202b. Handle; 3. Buffer pad; 4. Outer ring beam; 5. Temporary component; 6. Exterior wall of main structure; 7. Air conditioning panel. DETAILED DESCRIPTION

[0040] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0041] In the technical solutions disclosed in this utility model application, unless otherwise indicated, directional terms such as "upper, lower, left, and right" are generally defined with reference to the drawing orientation of the corresponding drawings, and "inner" and "outer" refer to the inside and outside relative to the outline of the component or structure itself. Furthermore, in the description referring to the drawings, the same reference numerals in different drawings represent the same elements.

[0042] According to the utility model application, a horizontal protection device between the outer wall of the main structure and the outer ring beam is disclosed, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 8 Shown, including:

[0043] Combine Figure 8 , a pair of support members 1, one end of each support member 1 is an inverted U-shaped structure for clamping the peripheral ring beam 4, and the other end is used for supporting;

[0044] Combine Figure 1 The protective assembly 2 is used to be arranged in the space between the outer wall 6 of the main structure and the outer ring beam 4, and includes:

[0045] Combine Figure 2 、 Figure 5 , a fixed protection portion 201 is fixedly mounted on the upper end surface of the other end of each support member 1 and relatively close to one side of the peripheral ring beam 4 for protection;

[0046] Combine Figure 2 、 Figure 3 、 Figure 5 The movable protective part 202 is arranged on the upper end surface of the other end of each support member 1 and relatively close to the side of the outer wall 6 of the main structure, and is movably coupled with the fixed protective part 201. The movable protective part 202 can form a space for disassembling the temporary component 5 in the retracted state.

[0047] In the above technical solution, a pair of support members 1 are provided. Both support members 1 utilize an inverted U-shaped structure at one end to clamp the outer ring beam 4, and the other end is used to support the protective assembly 2 installed on the upper end thereof. When in use, the protective assembly 2 will completely cover the space between the outer wall 6 of the main structure and the outer ring beam 4, filling the horizontal gap between the air-conditioning panels 7 and the air-conditioning panels 7, eliminating the safety hazard caused by the horizontal gap to the construction workers during construction. At the same time, the protective assembly 2 includes a fixed protective part 201 and a movable protective part 202, and the two are movably coupled (the movable coupling connection may include: hinge connection, sliding plug-in and other movable connection methods). The movable protective part 202 can reciprocate relative to the fixed protective part 201 at any time, so that the protective assembly 2 can freely switch between the expanded state and the retracted state, wherein the protective assembly 2 is in the state of use when in the expanded state, and the protective assembly 2 can make a certain amount of space in the retracted state, such as Figure 4 As shown, the space can be used by construction workers to dismantle the temporary components 5 on the outer wall 6 of the main structure. In actual construction, the temporary components 5 that need to be dismantled are usually aluminum formwork K plates.

[0048] To sum up, this solution can solve the problems of inconvenient installation and disassembly of existing protective devices and inconvenient disassembly of aluminum formwork K-plates on the basis of fully ensuring the safety of construction workers. It achieves the technical effect of convenient installation and disassembly of protective devices, improving turnover efficiency, while ensuring the convenience of disassembly of aluminum formwork K-plates and effectively avoiding conflicts with aluminum formwork support poles, and ultimately achieves the purpose of fully ensuring the safety of construction workers, improving construction efficiency and reducing construction costs.

[0049] In this embodiment, if Figure 8 As shown, each support member 1 includes:

[0050] The movable clamping arm 101 is an inverted L-shaped structure, and a plurality of distance adjustment holes 101a are formed at intervals on the side surface of the horizontal end of the movable clamping arm 101;

[0051] The connecting clamp arm 102 is a T-shaped structure. One end of the connecting clamp arm 102 is slidably inserted into the horizontal end of the movable clamp arm 101, and a through hole 102a corresponding to the plurality of distance adjustment holes 101a is formed on the side surface. The upper end surface of the other end of the connecting clamp arm 102 is fixed with a fixed protective part 201. In this solution, the support member 1 is designed as a split structure: one end of the connecting clamp arm 102 is slidably inserted into the movable clamp arm 101, and at the same time, a plurality of distance adjustment holes 101a are formed on the movable clamp arm 101, and corresponding through holes 102a are formed on the connecting clamp arm 102. Then, fixing bolts can be inserted into the connecting clamp arm 102 and the movable clamp arm 101 for fixing, so that the support member 1 can clamp the outer ring beams 4 of different thicknesses, so that the protective device can be used for buildings of different specifications, sizes, and types, thereby expanding the scope of use of the protective device. Furthermore, if Figure 8 As shown, a diagonal support tube 103 can be fixedly mounted on the connecting clamp arm 102. The stability of the triangular structure can be used to strengthen the supporting force of the support member 1 and enhance the safety of the protective device.

[0052] Furthermore, in some embodiments, Figure 4 As shown, the inner sidewall of the movable clamping arm 101 and / or the connecting clamping arm 102 is provided with a buffer pad 3 to reduce the wear of the movable clamping arm 101 and the connecting clamping arm 102 on the peripheral ring beam 4. The material of the buffer pad 3 can be elastic rubber, vulcanized rubber, polytetrafluoroethylene, etc., which is not specifically limited here.

[0053] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 As shown, the movable guard portion 202 is connected to the fixed guard portion 201 by a hinge, and the direction of the hinge axis is in the horizontal direction parallel to the peripheral ring beam 4. The movable guard portion 202 can be flipped along the hinge axis toward the peripheral ring beam 4. By flipping the movable guard portion 202, the guard assembly 2 can be freely switched between the expanded state and the retracted state, so that a space for disassembling the temporary component 5 can be formed in the retracted state. In some specific embodiments, such as Figure 2 、 Figure 3 As shown, both the fixed protective portion 201 and the movable protective portion 202 are rectangular frame structures with a hollowed-out center, and the hollow portions of the fixed protective portion 201 and the movable protective portion 202 are covered with a wire mesh. Furthermore, in some embodiments, the movable clamping arm 101, the connecting clamping arm 102, and the rectangular frames of the fixed protective portion 201 and the movable protective portion 202 are all composed of square tubes.

[0054] Furthermore, the movable clamping arm 101, the connecting clamping arm 102, the fixed protection part 201 and the movable protection part 202 are all made of galvanized steel pipes. The use of galvanized steel pipes has strong corrosion resistance and high rigidity, which not only prolongs the service life of the device but also further improves the safety of the protection device.

[0055] In this embodiment, Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 As shown, the interior of the fixed protection part 201 is a rectangular groove structure, and one end surface of the fixed protection part 201 is provided with an opening connected to the groove structure.

[0056] Combine Figure 6 , the opening and the rectangular groove structure form a slide 201a; the movable protective portion 202 is partially slidably inserted into the slide 201a, and the movable protective portion 202 can slide along the slide 201a close to or away from the outer wall 6 of the main structure,

[0057] Combine Figure 7 A limiting through hole 202a is formed on the outer end of the movable protective portion 202;

[0058] Combine Figure 8 A limiting hole 102b matching the limiting through hole 202a is formed on the outer end of the connecting clamp arm 102.

[0059] In this solution, the protective assembly 2 can be freely switched between the deployed and retracted states by inserting and removing the movable protective portion 202 within the fixed protective portion 201, thereby creating a space for removing the temporary component 5 in the retracted state. In addition, when the protective assembly 2 is used in the deployed state, after the movable protective portion 202 is pulled out to a position where the limiting through hole 202a is directly opposite the limiting hole 102b on the connecting clamp arm 102, a fixing pin can be installed to secure it, so that the protective assembly 2 can be stably laid between the two air conditioning panels 7.

[0060] Furthermore, if Figure 7 As shown, a handle 202 b is further provided at the outer end of the movable protective portion 202 to facilitate construction workers to plug and unplug the movable protective portion 202 .

[0061] This utility model application exemplarily describes the steps for using the horizontal protection device, which are as follows:

[0062] S1. Install the horizontal protection device between the main structure outer wall 6 and the peripheral ring beam 4. Adjust the connection clamp arm 102 and the movable clamp arm 101 to a suitable insertion depth so that they just clamp the peripheral ring beam 4. Then install the fixing bolts in the connection clamp arm 102 and the movable clamp arm 101.

[0063] S2. Using the hinged connection between the fixed protection part 201 and the movable protection part 202, flip the movable protection part 202 so that the entire protection assembly is in an unfolded state, so that the horizontal protection device can completely fill the space between the two air conditioning panels 7, and then proceed with construction on this floor;

[0064] S3. When the aluminum formwork K plate needs to be removed at a certain stage of construction, the movable protective part 202 is flipped over again to retract the protective assembly as a whole, thereby forming a space for removing the aluminum formwork K plate located below. The aluminum formwork K plate is then removed.

[0065] S4, flip the movable protection part 202 again, so that the protection assembly 2 is in the unfolded state again, and continue construction;

[0066] S5. After the construction of this floor is completed, the protective device will be removed and moved to other floors for continued use.

[0067] The preferred embodiments of the present utility model application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the scope of the disclosed technical concept, various simple modifications can be made to the technical solution of the present utility model application, and these simple modifications all fall within the scope of protection of the present application.

[0068] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner unless there is any contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0069] In addition, the various implementation methods of the present utility model application can also be arbitrarily combined, as long as they do not violate the concept of the present disclosure, they should also be regarded as the content disclosed in the present utility model application.

Claims

1. A horizontal protection device between the outer wall of the main structure and the outer ring beam, characterized in that: include: A pair of support members (1), one end of each support member (1) is an inverted U-shaped structure for clamping the peripheral ring beam (4), and the other end is used for supporting; The protective assembly (2) is used to be arranged in the space between the outer wall (6) of the main structure and the outer ring beam (4), and comprises: A fixed protection portion (201) is fixedly mounted on the upper end surface of the other end of the support member (1) and relatively close to the side of the peripheral ring beam (4) for protection; A movable protective portion (202) is provided on the upper end surface of the other end of the support member (1) and relatively close to the side of the main structure outer wall (6), and is movably coupled to the fixed protective portion (201). The movable protective portion (202) can form a space for disassembling the temporary component (5) in a retracted state.

2. The horizontal protection device between the outer wall of the main structure and the outer ring beam according to claim 1 is characterized in that: Each of the support members (1) comprises: The movable clamping arm (101) is an inverted L-shaped structure, and a plurality of distance adjustment holes (101a) are formed at intervals on the side surface of the horizontal end of the movable clamping arm (101); The connecting clamp arm (102) is a T-shaped structure. One end of the connecting clamp arm (102) is slidably inserted into the horizontal end of the movable clamp arm (101), and a through hole (102a) corresponding to the plurality of distance adjustment holes (101a) is formed on the side surface. The upper end surface of the other end of the connecting clamp arm (102) is fixed with the fixed protective portion (201).

3. The horizontal protection device between the outer wall of the main structure and the peripheral ring beam according to claim 2, characterized in that: A diagonal support tube (103) is fixedly mounted on the connecting clamp arm (102).

4. The horizontal protection device between the outer wall of the main structure and the outer ring beam according to claim 3, characterized in that: The inner side wall of the movable clamping arm (101) and / or the connecting clamping arm (102) is provided with a buffer pad (3).

5. The horizontal protection device between the outer wall of the main structure and the outer ring beam according to any one of claims 2 to 4, characterized in that: The movable protection part (202) is connected to the fixed protection part (201) via a hinge, and the direction of the hinge axis is a horizontal direction parallel to the peripheral ring beam (4). The movable protection part (202) can be turned toward the peripheral ring beam (4) along the hinge axis.

6. The horizontal protection device between the outer wall of the main structure and the outer ring beam according to claim 5, characterized in that: The fixed protection part (201) and the movable protection part (202) are both rectangular frame structures, and the hollow parts of the rectangular frame structures are covered with steel mesh.

7. The horizontal protection device between the outer wall of the main structure and the peripheral ring beam according to claim 6, characterized in that: The movable clamping arm (101), the connecting clamping arm (102), and the rectangular frames of the fixed protection part (201) and the movable protection part (202) are all composed of square tubes.

8. The horizontal protection device between the outer wall of the main structure and the peripheral ring beam according to claim 7, characterized in that: The movable clamping arm (101), the connecting clamping arm (102), the fixed protection part (201) and the movable protection part (202) are all made of galvanized steel pipes.

9. The horizontal protection device between the outer wall of the main structure and the outer ring beam according to any one of claims 2 to 4, characterized in that: The interior of the fixed protection part (201) is a rectangular groove structure, and an opening connected to the groove structure is formed on one end surface thereof, and the opening and the rectangular groove structure form a slide groove (201a); the movable protection part (202) is partially slidably inserted into the slide groove (201a), and the movable protection part (202) can slide along the slide groove (201a) toward or away from the outer wall (6) of the main structure, and a limiting through hole (202a) is formed on the outer end of the movable protection part (202); A limiting hole (102b) matching the limiting through hole (202a) is formed on the outer end of the connecting clamp arm (102).

10. The horizontal protection device between the outer wall of the main structure and the outer ring beam according to claim 9, characterized in that: The outer end of the movable protective portion (202) is also provided with a handle (202b).

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