Pedestrian overpass safety protection device

Abstract

The utility model relates to the technical field of pedestrian overpasses, in particular to a pedestrian overpass safety protection device which comprises a base plate, stand columns, a damping shock absorption mechanism, a partition plate, a buffering mechanism and a protection plate. The stand column is vertically arranged on the base plate. One end of the damping mechanism is connected with the substrate, and the other end is connected with the clapboard; the other end of the partition plate is connected with the protection plate through a buffering mechanism. The damping shock absorption mechanism and the protection plate can stretch out and draw back in the direction perpendicular to the end face of the protection plate. Impact force of pedestrians on the protection plate is buffered for the first time through the buffering mechanism and then buffered for the second time through the damping shock absorption mechanism, and finally the impact force is transmitted to the base plate through the stand columns. The arrangement of the two-stage buffer structure can effectively buffer the impact force borne by the protection plate, the impact force of the stand column on the bridge body is reduced, the connection stability of the guardrail and the base plate is guaranteed, and then the protection performance of the stand column is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pedestrian bridges, in particular to a safety protection device for pedestrian bridges. Background Art

[0002] Pedestrian overpasses, also known as pedestrian flyovers, are usually built in areas with heavy traffic and dense pedestrian traffic, or at intersections, squares, and railways. Pedestrian overpasses only allow pedestrians to pass through, and are used to avoid conflicts when traffic and pedestrian traffic intersect, and to separate people and vehicles. This not only ensures the safety of pedestrians on the pedestrian overpass, but also helps to increase the speed of traffic on the road and reduce traffic accidents. According to the structure, common pedestrian overpasses can be divided into three categories, namely suspended structure, supporting structure, and mixed structure. Guardrails are usually set on both sides of the bridge for protection.

[0003] The guardrails of traditional pedestrian bridges are fixed on the bridge body, and glass is usually installed between adjacent guardrails to prevent pedestrians from falling from the pedestrian bridge. The guardrails only have a limiting function. When pedestrians accidentally hit the guardrails, it is easy to cause damage to the guardrails and themselves, and the glass is easy to shatter under the impact force, which poses a safety hazard of pedestrians falling from the pedestrian bridge. Therefore, the protective performance of the guardrails of traditional pedestrian bridges is poor. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a safety protection device for a pedestrian bridge, which solves the technical problem that the protection performance of the guardrail of a traditional pedestrian bridge is poor.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the pedestrian bridge safety protection device of the utility model comprises a base plate, a column, a damping shock absorbing mechanism, a partition, a buffer mechanism and a protection plate;

[0008] The pillar is vertically arranged on the base plate;

[0009] One end of the damping and shock absorbing mechanism is connected to the base plate, and the other end is connected to the partition plate; the other end of the partition plate is connected to the protective plate through the buffer mechanism;

[0010] The damping and shock absorbing mechanism and the protective plate can both be extended and retracted along a direction perpendicular to the end surface of the protective plate.

[0011] Optionally, the buffer mechanism includes a housing, a pressure rod, a pressure head, an inclined push plate and a buffer spring;

[0012] One end of the shell is connected to the partition;

[0013] The pressure rod passes through the other end of the housing, and the two are connected by sliding along the axial direction of the pressure rod; one end of the pressure rod is connected to the protective plate, and the other end is connected to the pressure head;

[0014] The pressure head is slidably connected to the inclined push plate;

[0015] The inclined push plate is connected to the side wall of the shell through the buffer spring; the axis of the buffer spring is perpendicular to the axis of the pressure rod; when the pressure rod slides along its axial direction, it can push the inclined push plate to move along the axial direction of the buffer spring.

[0016] Optionally, the pressure head is a conical head;

[0017] The conical head is slidably disposed between the pair of inclined push plates, and the side surface of the conical head is in surface contact with the pair of inclined push plates.

[0018] Optionally, one end of the inclined push plate facing away from the pressure rod is connected to a mounting plate;

[0019] The mounting plate is connected to the housing;

[0020] The buffer spring is arranged between the mounting plate and the side wall of the housing;

[0021] The axis of the buffer spring is perpendicular to the mounting plate.

[0022] Optionally, the buffer mechanism further comprises a sliding block and a guide rail which are slidably connected;

[0023] The guide rail is mounted on the housing along the axial direction of the buffer spring;

[0024] The sliding block is mounted on an end of the inclined push plate away from the pressure head.

[0025] Optionally, the buffer mechanism further includes a locking knob;

[0026] The shell comprises an outer cylinder and an inner cylinder; the outer cylinder is connected to the partition; the outer cylinder is slidably sleeved on the inner cylinder;

[0027] The locking knob passes through the outer cylinder and is threadedly connected to the inner cylinder.

[0028] Optionally, the damping shock absorbing mechanism comprises a damping shock absorbing spring, a guide member and a top plate;

[0029] One end of the damping spring is connected to the partition plate, and the other end is connected to the top plate;

[0030] The top plate is connected to the column;

[0031] One end of the guide member is connected to the partition plate, and the other end is connected to the top plate;

[0032] Optionally, the guide member is a telescopic rod or a folding bracket;

[0033] The folding bracket includes a hinged first bracket and a second bracket; the free end of the first bracket is hinged to the top plate; the free end of the second bracket is hinged to the partition plate.

[0034] Optionally, the pedestrian bridge safety protection device further includes a load-bearing beam, a reinforcement plate and fastening bolts;

[0035] One end of the reinforcing plate is connected to the column, and the other end is provided with a concave groove;

[0036] The load-bearing beam is embedded in the concave groove;

[0037] The load-bearing beam and the reinforcing plate are fixed by the fastening bolts.

[0038] Optionally, the pedestrian bridge safety protection device further includes a pole and a handrail;

[0039] The vertical rod is arranged in parallel with the column; one end of the vertical rod is connected to the base plate, and the other end is connected to the handrail.

[0040] (III) Beneficial effects

[0041] The beneficial effects of the utility model are:

[0042] Along the direction perpendicular to the end face of the guard plate, the column, the damping shock absorbing mechanism, the partition, the buffer mechanism and the guard plate are connected in sequence. The impact force of pedestrians on the guard plate is buffered once by the buffer mechanism, and then buffered twice by the damping shock absorbing mechanism, and finally the impact force is transmitted to the base plate through the column. The setting of the two-stage buffer structure can effectively buffer the impact force on the guard plate, reduce the impact force of the column on the bridge body, ensure the connection stability between the guardrail and the base plate, and thus improve the protection performance of the column. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of the pedestrian bridge safety protection device of the utility model;

[0044] Figure 2 It is a side view of the pedestrian bridge safety protection device of the utility model;

[0045] Figure 3 It is a structural schematic diagram of the buffer mechanism of the utility model;

[0046] Figure 4 It is a schematic diagram of the connection between the locking knob and the buffer mechanism of the utility model.

[0047] [Description of Reference Numerals]

[0048] 1: Substrate;

[0049] 2: Column;

[0050] 3: damping shock absorbing mechanism; 31: damping shock absorbing spring; 32: guide member; 33: top plate;

[0051] 4: partition;

[0052] 5: buffer mechanism; 51: outer cylinder; 52: inner cylinder; 53: pressure rod; 54: pressure head; 55: inclined push plate; 56: buffer spring; 57: mounting plate; 58: slider; 581: guide rail; 59: locking knob;

[0053] 6: Protective plate;

[0054] 7: load-bearing beam;

[0055] 8: reinforcement plate; 81: fastening bolts;

[0056] 9: Pole; 91: Handrail. DETAILED DESCRIPTION

[0057] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0058] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0059] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] See also Figure 1 and Figure 2 The utility model provides a pedestrian bridge safety protection device, which includes a base plate 1, a column 2, a damping and shock absorbing mechanism 3, a partition 4, a buffer mechanism 5 and a protective plate 6; the column 2 is vertically arranged on the base plate 1; one end of the damping and shock absorbing mechanism 3 is connected to the base plate 1, and the other end is connected to the partition 4; the other end of the partition 4 is connected to the protective plate 6 through the buffer mechanism 5; the damping and shock absorbing mechanism 3 and the protective plate 6 can be extended and retracted along the direction perpendicular to the end face of the protective plate 6. Among them, the base plate 1 can be a bridge body, and the base plate 1 can also be installed on the bridge body. The column 2 can be a traditional guardrail structure. The protective plate 6 can be made of glass, which is both beautiful and good for lighting; soft materials, such as rubber, can also be used to further buffer external impact forces and effectively protect pedestrians.

[0062] The specific number of the damping and shock absorbing mechanism 3 and the buffer mechanism 5 is set according to the size of the protective plate 6. In this embodiment, Figure 2 Along the axial direction of the column 2, a pair of buffer mechanisms 5 are correspondingly arranged at the upper and lower ends of the protective plate 6. When subjected to external impact force, even if the impact force is concentrated at the edge of the protective plate 6, the impact force can be effectively transmitted to the partition 4 to achieve flexible protection, which can effectively prevent the protective plate 6 from being broken or shattered by local impact force. The damping shock absorbing mechanism 3 damps and absorbs the impact force, greatly buffers the impact force, thereby reducing the impact force of the bottom end of the column 2 on the base plate 1, ensuring the connection strength between the two, and extending the service life of the pedestrian bridge safety protection device.

[0063] Along the direction perpendicular to the end face of the guard plate 6, the column 2, the damping shock absorbing mechanism 3, the partition 4, the buffer mechanism 5 and the guard plate 6 are connected in sequence, and the impact force of pedestrians on the guard plate 6 is buffered once by the buffer mechanism 5, and then buffered twice by the damping shock absorbing mechanism 3, and finally the impact force is transmitted to the base plate 1 through the column 2. The setting of the two-stage buffer structure can effectively buffer the impact force on the guard plate 6, reduce the impact force of the column 2 on the bridge body, ensure the connection stability between the guardrail and the base plate 1, and thus improve the protection performance of the column 2.

[0064] like Figure 3As shown, the buffer mechanism 5 includes a shell, a pressure rod 53, a pressure head 54, an inclined push plate 55 and a buffer spring 56; one end of the shell is connected to the partition 4; the pressure rod 53 passes through the other end of the shell, and the two are connected in a sliding manner along the axial direction of the pressure rod 53; one end of the pressure rod 53 is connected to the protective plate 6, and the other end is connected to the pressure head 54; the pressure head 54 is connected in a sliding manner to the inclined push plate 55; the inclined push plate 55 is connected to the side wall of the shell through the buffer spring 56; the axis of the buffer spring 56 is perpendicular to the axis of the pressure rod 53; when the pressure rod 53 slides along its axial direction, it can push the inclined push plate 55 to move along the axial direction of the buffer spring 56. Specifically, the inclined push plate 55 is at a certain angle to the axis of the pressure rod 53, so that the pressure head 54 can squeeze the inclined push plate 55, and the inclined push plate 55 can distribute the force applied by the pressure head 54 to the axial direction of the pressure rod 53 and the axial direction of the buffer spring 56, and the buffer spring 56 distributes the impact force of the buffer spring 56 in the axial direction, thereby reducing the radial impact force of the column 2 on the base plate 1. In this embodiment, a pair of inclined push plates 55 and a pair of buffer springs 56 are provided, which are correspondingly arranged on both sides of the pressure head 54 to improve the transmission stability of the pressure head 54 and the inclined push plates 55 and effectively share the axial force of the buffer springs 56.

[0065] Furthermore, the pressure head 54 is a conical head; the conical head is slidably disposed between a pair of inclined push plates 55, and the side surface of the conical head is in surface contact with the pair of inclined push plates 55. The shapes and inclination angles of the contact surfaces of the pressure head 54 and the inclined push plates 55 are adapted to each other. Compared with the cylindrical pressure head 54, the conical head can increase the contact area between the pressure head 54 and the inclined push plates 55, and can effectively avoid the situation where the external impact force acts on the inclined push plates 55 instantaneously and damages the inclined push plates 55, thereby extending the service life of the pressure head 54 and the inclined push plates 55 and enhancing the transmission stability of the two.

[0066] Secondly, the end of the inclined push plate 55 facing away from the pressure rod 53 is connected to a mounting plate 57; the mounting plate 57 is connected to the housing; the buffer spring 56 is arranged between the mounting plate 57 and the side wall of the housing; the axis of the buffer spring 56 is perpendicular to the mounting plate 57. The mounting plate 57 and the inclined push plate 55 can be welded or integrally formed. Compared with the installation method in which the buffer spring 56 is directly installed on the inclined push plate 55 (i.e., the inclined surface installation method), the end face of the mounting plate 57 is arranged perpendicular to the axis of the buffer spring 56 (i.e., the plane installation method), so that when the inclined push plate 55 squeezes the buffer spring 56, the force on the end of the buffer spring 56 toward the mounting plate 57 is uniform, which can effectively extend the service life of the buffer spring 56.

[0067] In addition, the buffer mechanism 5 further includes a sliding block 58 and a guide rail 581 which are slidably connected; the guide rail 581 is mounted on the housing along the axial direction of the buffer spring 56; the sliding block 58 is mounted on the end of the inclined push plate 55 away from the pressure head 54. Compared with the method in which the bottom end of the inclined push plate 55 (or the bottom end of the mounting plate 57) directly slides on the inner wall of the housing, the sliding block 58 and the guide rail 581 can effectively reduce the wear of the inclined push plate 55, and can guide the effective push plate 55 and the buffer spring 56, further improving the transmission stability of the buffer mechanism 5.

[0068] like Figure 4 As shown, the buffer mechanism 5 also includes a locking knob 59; the shell includes an outer cylinder 51 and an inner cylinder 52; the outer cylinder 51 is connected to the partition 4; the outer cylinder 51 is slidably sleeved on the inner cylinder 52; the locking knob 59 passes through the outer cylinder 51 and is threadedly connected to the inner cylinder 52. In this embodiment, the outer cylinder 51 is fixed on the partition 4, and the inner cylinder 52 is detachably connected to the outer cylinder 51, which improves the convenience of disassembly and assembly of the pedestrian bridge safety protection device. Specifically, when installing the buffer mechanism 5, first slide the inner cylinder 52 into the outer cylinder 51, then pass the locking knob 59 through the limiting hole opened on the outer cylinder 51, and thread the locking knob 59 with the threaded hole opened on the outer wall of the inner cylinder 52 to achieve fixed installation of the outer cylinder 51 and the inner cylinder 52, thereby achieving rapid disassembly and assembly of the partition 4 and the protective plate 6, reducing the difficulty of disassembly and assembly of the pedestrian bridge safety protection device and reducing the disassembly and assembly time. The same is true when disassembling the buffer mechanism 5, which will not be repeated.

[0069] Furthermore, the damping shock absorbing mechanism 3 includes a damping shock absorbing spring 31, a guide member 32 and a top plate 33; one end of the damping shock absorbing spring 31 is connected to the partition 4, and the other end is connected to the top plate 33; the top plate 33 is connected to the column 2; one end of the guide member 32 is connected to the partition 4, and the other end is connected to the top plate 33. The damping shock absorbing spring 31 further buffers the external impact force, further reduces the radial impact force of the column 2 on the base plate 1, and effectively ensures the service life of the pedestrian bridge safety protection device and the travel safety of pedestrians. The guide member 32 can be a telescopic rod to guide the extension and retraction of the damping shock absorbing spring 31.

[0070] Secondly, the guide member 32 is a telescopic rod or a folding bracket; the folding bracket includes a hinged first bracket and a second bracket; the free end of the first bracket is hinged to the top plate 33; the free end of the second bracket is hinged to the partition 4. Compared with the telescopic rod, the folding bracket can not only guide the extension and contraction of the damping spring 31, but also share the external impact force, that is, share the impact force along the axial direction of the column 2, and further reduce the radial impact force of the column 2 on the base plate 1.

[0071] In addition, the pedestrian bridge safety protection device also includes a load-bearing beam 7, a reinforcement plate 8 and a fastening bolt 81; one end of the reinforcement plate 8 is connected to the column 2, and the other end is provided with a concave groove; the load-bearing beam 7 is embedded in the concave groove; the load-bearing beam 7 and the reinforcement plate 8 are fixed by fastening bolts 81. In this embodiment, the load-bearing beam 7 is a square beam, and the shape of the concave groove is adapted to the shape of the load-bearing beam 7. The concave groove can limit the load-bearing beam 7 on the axis and radial direction of the column 2, thereby improving the overall stability of the device. The fastening bolt 81 can be compared to the fastening method of the locking knob 59, and will not be repeated. The reinforcement plate 8 is fixed to the column 2, and the load-bearing beam 7 and the reinforcement plate 8 are detachably connected, which further optimizes the disassembly and assembly process of the pedestrian bridge safety protection device and saves the disassembly and assembly time.

[0072] Furthermore, the pedestrian bridge safety protection device further comprises a pole 9 and a handrail 91; the pole 9 is arranged parallel to the column 2; one end of the pole 9 is connected to the base plate 1, and the other end is connected to the handrail 91. Figure 2 In this embodiment, the bottom end of the vertical pole 9 is arranged on the side of the base plate 1 close to the pedestrian, the vertical pole 9 passes between the column 2 and the partition 4, and the protective plate 6 is closer to the pedestrian than the handrail 91. The positions of the vertical pole 9 and the handrail 91 are reasonably arranged, and the force of the handrail 91 is directly transmitted to the base plate 1 through the vertical pole 9, which does not affect the force of the buffer mechanism 5 and the damping shock absorbing mechanism 3. When a pedestrian accidentally falls, holds the handrail 91 and hits the protective plate 6, it can be regarded that the vertical pole 9 shares the impact force of the buffer mechanism 5 and the damping shock absorbing mechanism 3. Therefore, the arrangement of the vertical pole 9 and the handrail 91 can further improve the anti-collision performance of the pedestrian bridge safety protection device, improve the protectiveness of the pedestrian bridge safety protection device, and ensure the safety of pedestrian travel.

[0073] In one embodiment, the upright pole 9 and the handrail 91 are fixedly mounted on the base plate 1, the upright column 2 is fixedly connected to the base plate 1, the load-bearing beam 7, the damping shock absorbing mechanism 3, the partition plate 4 and the outer cylinder 51 are fixedly connected, and the inner cylinder 52 is fixedly connected to the protective plate 6 through the pressure rod 53. When installing the pedestrian bridge safety protection device, first fix the base plate 1 on the bridge body; then embed the load-bearing beam 7 into the concave groove of the reinforcement plate 8 and fix it with the fastening bolt 81; embed the inner cylinder 52 into the outer cylinder 51 and fix it with the locking knob 59, and the installation of the pedestrian bridge safety protection device is completed. Arranging multiple pedestrian bridge safety protection devices in an array on both sides of the bridge body effectively solves the problem of poor protection performance of traditional guardrails.

[0074] It should be understood that the above description of the specific embodiments of the utility model is only for illustrating the technical route and features of the utility model, and its purpose is to enable those skilled in the art to understand the content of the utility model and implement it accordingly, but the utility model is not limited to the above specific implementation methods. All changes or modifications made within the scope of the claims of the utility model should be included in the protection scope of the utility model.

Claims

1. A pedestrian bridge safety protection device, characterized in that: The pedestrian bridge safety protection device comprises a base plate (1), a column (2), a damping shock absorbing mechanism (3), a partition (4), a buffer mechanism (5) and a protection plate (6); The upright column (2) is vertically arranged on the base plate (1); One end of the damping and shock absorbing mechanism (3) is connected to the base plate (1), and the other end is connected to the partition plate (4); the other end of the partition plate (4) is connected to the protective plate (6) via the buffer mechanism (5); The damping and shock absorbing mechanism (3) and the protective plate (6) are both capable of extending and retracting in a direction perpendicular to the end surface of the protective plate (6).

2. The pedestrian bridge safety protection device according to claim 1 is characterized in that: The buffer mechanism (5) comprises a housing, a pressure rod (53), a pressure head (54), an inclined push plate (55) and a buffer spring (56); One end of the shell is connected to the partition (4); The pressure rod (53) passes through the other end of the housing, and the two are connected in a sliding manner along the axial direction of the pressure rod (53); one end of the pressure rod (53) is connected to the protective plate (6), and the other end is connected to the pressure head (54); The pressure head (54) is slidably connected to the inclined push plate (55); The inclined push plate (55) is connected to the side wall of the shell through the buffer spring (56); the axis of the buffer spring (56) is perpendicular to the axis of the pressure rod (53); when the pressure rod (53) slides along its axial direction, it can push the inclined push plate (55) to move along the axial direction of the buffer spring (56).

3. The pedestrian bridge safety protection device according to claim 2 is characterized in that: The pressure head (54) is a conical head; The conical head is slidably disposed between a pair of the inclined push plates (55), and the side surfaces of the conical head are in surface contact with the pair of the inclined push plates (55).

4. The pedestrian bridge safety protection device according to claim 3 is characterized in that: One end of the inclined push plate (55) away from the pressure rod (53) is connected to a mounting plate (57); The mounting plate (57) is connected to the housing; The buffer spring (56) is arranged between the mounting plate (57) and the side wall of the housing; the axis of the buffer spring (56) is perpendicular to the mounting plate (57).

5. The pedestrian bridge safety protection device according to claim 2, characterized in that: The buffer mechanism (5) further comprises a sliding block (58) and a guide rail (581) which are slidably connected; The guide rail (581) is installed on the housing along the axial direction of the buffer spring (56); The sliding block (58) is mounted on an end of the inclined push plate (55) away from the pressure head (54).

6. The pedestrian bridge safety protection device according to claim 2, characterized in that: The buffer mechanism (5) further comprises a locking knob (59); The shell comprises an outer cylinder (51) and an inner cylinder (52); the outer cylinder (51) is connected to the partition (4); the outer cylinder (51) is slidably sleeved on the inner cylinder (52); The locking knob (59) passes through the outer tube (51) and is threadedly connected to the inner tube (52).

7. The pedestrian bridge safety protection device according to any one of claims 1 to 6, characterized in that: The damping shock absorbing mechanism (3) comprises a damping shock absorbing spring (31), a guide member (32) and a top plate (33); One end of the damping spring (31) is connected to the partition plate (4), and the other end is connected to the top plate (33); The top plate (33) is connected to the column (2); One end of the guide member (32) is connected to the partition plate (4), and the other end is connected to the top plate (33).

8. The pedestrian bridge safety protection device according to claim 7, characterized in that: The guide member (32) is a telescopic rod or a folding bracket; The folding bracket comprises a first bracket and a second bracket which are hingedly connected; the free end of the first bracket is hingedly connected to the top plate (33); and the free end of the second bracket is hingedly connected to the partition plate (4).

9. The pedestrian bridge safety protection device according to any one of claims 1 to 6, characterized in that: The pedestrian bridge safety protection device also includes a load-bearing beam (7), a reinforcement plate (8) and fastening bolts (81); One end of the reinforcing plate (8) is connected to the column (2), and the other end is provided with a concave groove; The load-bearing beam (7) is embedded in the concave groove; The load-bearing beam (7) and the reinforcing plate (8) are fixed by means of the fastening bolts (81).

10. The pedestrian bridge safety protection device according to any one of claims 1 to 6, characterized in that: The pedestrian bridge safety protection device also includes a vertical pole (9) and a handrail (91); The upright pole (9) is arranged in parallel with the upright column (2); one end of the upright pole (9) is connected to the base plate (1), and the other end is connected to the handrail (91).

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