Elevator system and car top guardrail

Abstract

The present invention discloses an elevator system, where the control panel is installed on the right side wall at the upper right rear corner of the hoistway; the car top guardrail has two states: deployed and folded; when the car runs to the upper limit position of the hoistway, the upper right corner of the car top guardrail in the deployed state will not interfere with the control panel door in the closed state, and the upper right corner of the car top guardrail in the deployed state will be on the opening path of the control panel door and the control panel main body, interfering with the opening of the control panel door; when the car runs to the upper limit position of the hoistway, the upper right corner of the car top guardrail in the folded state will not interfere with the control panel door in the closed state, and the upper right corner of the car top guardrail in the folded state is not on the opening path of the control panel door and the control panel main body, without interfering with the opening of the control panel door. The present invention also discloses a car top guardrail. The present invention can reduce the requirement of the elevator for the top floor height while meeting the requirements of workers for elevator maintenance operations.

Description

Technical Field

[0001] The present invention relates to elevator technology, and particularly to an elevator system and a car top guardrail. Background Art

[0002] On the car top of a box elevator, a car top guardrail needs to be set according to the national standard. Its function is to prevent maintenance personnel from falling into the hoistway from the car top during maintenance work, causing casualties.

[0003] As the core of the elevator control unit, the elevator control panel needs to be often opened for maintenance during routine maintenance. Since there is a safety circuit on the control panel door, the elevator will power off and cannot operate when the control panel is opened. When there is no machine room in the hoistway, the elevator control panel will be installed on the inner wall of the hoistway.

[0004] In order to be able to open the control panel smoothly during normal maintenance, the control panel needs to be set at a position above the car top guardrail. When the lifting height is small and the outer dimension of the car is high, after the car runs to the top of the hoistway, in order to avoid interference between the opened control panel door and the car top guardrail, additional top floor height needs to be occupied to set the control panel. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to reduce the requirement of the elevator for the top floor height while meeting the requirements of workers for elevator maintenance operations.

[0006] To solve the above technical problem, the elevator system provided by the present invention includes a car 9, a control panel 8, a hoistway 7, and a car top guardrail 1;

[0007] The control panel 8 is installed on the right side wall at the upper right rear corner of the hoistway 7 for controlling the operation of the elevator;

[0008] The control panel 8 includes a control panel main body 81 and a control panel door 82;

[0009] A vertical hinge shaft is provided on the side of the control panel main body 81 near the right rear corner of the hoistway;

[0010] The rear end of the control panel door 82 is hinged to the control panel main body 81 through the hinge shaft. When the control panel door 81 rotates around the vertical hinge shaft towards the rear side wall of the hoistway 7, the control panel door 82 and the control panel main body 81 are opened; when the control panel door 82 rotates around the vertical hinge shaft towards the right side wall of the hoistway 7, the control panel door 82 and the control panel main body 81 are closed;

[0011] The car 9 moves up and down in the hoistway 7;

[0012] The car top guardrail 1 is fixed on the car top;

[0013] The car top guardrail 1 has two states: unfolded and folded;

[0014] When in the deployed state, the car top guardrail 1 is a cuboid formed by four frames in the front, rear, left, and right directions;

[0015] When the car 9 runs to the upper limit position in the hoistway 7, the upper right corner of the car top guardrail 1 in the deployed state will not interfere with the control panel door 82 in the closed state, and the upper right corner of the car top guardrail 1 in the deployed state will be on the opening path of the control panel door 82 relative to the control panel main body 81, interfering with the opening of the control panel door 82;

[0016] When the car 9 runs to the upper limit position in the hoistway 7, the upper right corner of the car top guardrail 1 in the folded state will not interfere with the control panel door 82 in the closed state, and the upper right corner of the car top guardrail 1 in the folded state is not on the opening path of the control panel door 82 relative to the control panel main body 81, not interfering with the opening of the control panel door 82.

[0017] Preferably, a safety circuit is provided on the control panel door 82. When the control panel door 82 is opened, the drive power supply circuit of the elevator traction machine is powered off.

[0018] Preferably, the upper guardrail of the rear frame of the car top guardrail 1 includes a rear upper fixed section 11 and a rear upper movable section 12;

[0019] A round hole is provided at the left end of the rear upper movable section 12, and a long hole is provided between the right end of the rear upper movable section 12 and the round hole;

[0020] The upper guardrail of the right frame of the car top guardrail 1 includes a right upper fixed section 21 and a right upper movable section 22;

[0021] Round holes are respectively provided at the front and rear ends of the right upper movable section 22;

[0022] The rear upper movable section 12 is connected to the right end of the rear upper fixed section 11 by passing a first rivet 31 through the round hole at the left end of the rear upper movable section 12, and the rear upper movable section 12 can rotate around the first rivet 31;

[0023] The rear upper movable section 12 is connected to the right upper movable section 22 by passing a second rivet 32 through the long hole of the rear upper movable section 12 and the round hole at the rear end of the right upper movable section 22. The right upper movable section 22 can rotate around the second rivet 32, and the second rivet 32 can move left and right along the long hole;

[0024] The right upper movable section 22 is connected to the rear end of the rear right upper fixed section 21 by passing a third rivet 33 through the round hole at the front end of the right upper movable section 22, and the right upper movable section 22 can rotate around the third rivet 33;

[0025] When the car top guardrail 1 is deployed, the second rivet 32 moves to the right end of the long hole, and the rear upper movable section 12 is perpendicular to the right upper movable section 22;

[0026] When the car top guardrail is folded, the second rivet 32 moves towards the left end of the long hole, and the angle between the rear upper movable section 12 and the upper right movable section 22 gradually increases from 90° to 180°.

[0027] Preferably, the connection structure between the lower guardrail of the rear frame and the lower guardrail of the right frame of the car top guardrail 1 is the same as the connection structure between the upper guardrail of the rear frame and the upper guardrail of the right frame of the car top guardrail 1.

[0028] Preferably, the car top guardrail 1 further includes a triangular positioning plate 5;

[0029] At least two positioning holes arranged left and right are provided at the rear part of the triangular positioning plate 5;

[0030] The right side of the triangular positioning plate 5 is fixedly connected to the upper side of the upper right movable section 22;

[0031] When the car top guardrail 1 is unfolded, the positioning hole at the leftmost end of the rear part of the triangular positioning plate 5 corresponds to the long hole, and the triangular positioning plate 5 is fixed to the rear upper movable section 12 through the square neck bolt plus wing nut assembly 4 to complete the unfolding and locking;

[0032] When the car top guardrail is folded to the maximum extent inward, the positioning hole at the rightmost end of the rear part of the triangular positioning plate 5 corresponds to the long hole, and the triangular positioning plate 5 is fixed to the rear upper movable section 12 through the square neck bolt plus wing nut assembly 4 to complete the maximum extent folding and locking.

[0033] Preferably, the right side of the triangular positioning plate 5 is fixedly connected to the upper side of the upper right movable section 22 by welding.

[0034] To solve the above technical problems, the car top guardrail provided by the present invention is surrounded by four frames in the front, rear, left and right directions. The upper guardrail of the rear frame of the car top guardrail includes a rear upper fixed section 11 and a rear upper movable section 12;

[0035] A circular hole is provided at the left end of the rear upper movable section 12, and a long hole is provided between the right end of the rear upper movable section 12 and the circular hole;

[0036] The upper guardrail of the right frame of the car top guardrail 1 includes an upper right fixed section 21 and an upper right movable section 22;

[0037] A circular hole is provided at each of the front and rear ends of the upper right movable section 22;

[0038] The rear upper movable section 12 can rotate around the first rivet 31 by passing the first rivet 31 through the circular hole at the left end of the rear upper movable section 12 and connecting it to the right end of the rear upper fixed section 11;

[0039] The rear upper movable section 12 and the upper right movable section 22 are connected by passing a second rivet 32 through the long hole of the rear upper movable section 12 and the round hole at the rear end of the upper right movable section 22. The upper right movable section 22 can rotate around the second rivet 32, and the second rivet 32 can move left and right along the long hole;

[0040] The front end of the upper right movable section 22 and the rear end of the rear upper right fixed section 21 are connected by passing a third rivet 33 through the round hole at the front end of the upper right movable section 22. The upper right movable section 22 can rotate around the third rivet 33;

[0041] When the car top guardrail 1 is deployed, the second rivet 32 moves to the right end of the long hole, and the rear upper movable section 12 is perpendicular to the upper right movable section 22;

[0042] When the car top guardrail is folded, the second rivet 32 moves to the left end of the long hole, and the included angle between the rear upper movable section 12 and the upper right movable section 22 gradually increases from 90° until 180°.

[0043] Preferably, the connection structure between the lower guardrail of the rear frame and the lower guardrail of the right frame of the car top guardrail 1 is the same as the connection structure between the upper guardrail of the rear frame and the upper guardrail of the right frame of the car top guardrail 1.

[0044] Preferably, the car top guardrail 1 further includes a triangular positioning plate 5;

[0045] At least two positioning holes arranged left and right are provided at the rear of the triangular positioning plate 5;

[0046] The right side of the triangular positioning plate 5 is fixedly connected to the upper side of the upper right movable section 22;

[0047] When the car top guardrail 1 is deployed, the positioning hole at the leftmost end of the rear of the triangular positioning plate 5 corresponds to the long hole, and the triangular positioning plate 5 and the rear upper movable section 12 are fixed together through a square neck bolt plus a wing nut assembly 4 to complete the deployment and locking;

[0048] When the car top guardrail is folded to the maximum extent inward, the positioning hole at the rightmost end of the rear of the triangular positioning plate 5 corresponds to the long hole, and the triangular positioning plate 5 and the rear upper movable section 12 are fixed together through a square neck bolt plus a wing nut assembly 4 to complete the maximum extent folding and locking.

[0049] Preferably, the right side of the triangular positioning plate 5 is fixedly connected to the upper side of the upper right movable section 22 by welding.

[0050] In the elevator system of the present invention, one corner of the car top guardrail 1 corresponding to the control panel 8 in the hoistway 7 can be folded inward. During maintenance, this corner of the car top guardrail 1 can be folded inward first to facilitate the opening of the control panel door 82. After the control panel door 82 is opened, this corner of the car top guardrail 1 is then unfolded for maintenance. While meeting the requirements of workers for elevator maintenance operations, it can reduce the requirement of the elevator for the top floor height. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for the present invention will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0052] Figure 1 is a schematic diagram of the expanded state of the car top guardrail of an embodiment of the elevator system of the present invention;

[0053] Figure 2 is a schematic diagram of the folded state of the car top guardrail of an embodiment of the elevator system of the present invention;

[0054] Figure 3 is a partially enlarged schematic diagram of the expanded state of the car top guardrail of an embodiment of the elevator system of the present invention;

[0055] Figure 4 is a schematic diagram of the triangular positioning plate of an embodiment of the elevator system of the present invention;

[0056] Figure 5 is a comparison diagram of the technical effects of the elevator system of the present invention.

[0057] DESCRIPTION OF THE REFERENCE NUMERALS

[0058] 1 car top guardrail; 11 rear upper fixed section; 12 rear upper movable section; 21 upper right fixed section; 22 upper right movable section; 31 first rivet; 32 second rivet; 33 third rivet; 4 square neck bolt plus wing nut assembly; 5 triangular positioning plate; 51 positioning hole; 6 rear side baffle; 7 hoistway; 8 control panel; 81 control panel main body; 82 control panel door; 9 car. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0059] The technical solutions in the present invention will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0060] Embodiment 1

[0061] AsFigure 1 , Figure 2 As shown in Figure 2 , the elevator system includes a car 9, a control panel 8, a hoistway 7, and a car top guardrail 1;

[0062] The control panel 8 is installed on the right side wall at the upper right rear corner of the hoistway 7 and is used to control the operation of the elevator;

[0063] The control panel 8 includes a control panel main body 81 and a control panel door 82;

[0064] A vertical hinge shaft is provided on the side of the control panel main body 81 near the right rear corner of the hoistway;

[0065] The rear end of the control panel door 82 is hinged to the control panel main body 81 through the hinge shaft. When the control panel door 81 rotates around the vertical hinge shaft towards the rear side wall of the hoistway 7, the control panel door 82 opens with the control panel main body 81; when the control panel door 82 rotates around the vertical hinge shaft towards the right side wall of the hoistway 7, the control panel door 82 closes with the control panel main body 81;

[0066] The car 9 moves up and down in the hoistway 7;

[0067] The car top guardrail 1 is fixed on the car top;

[0068] The car top guardrail 1 has two states: unfolded and folded;

[0069] In the unfolded state, the car top guardrail 1 is a cuboid surrounded by four frames in the front, rear, left, and right directions;

[0070] When the car 9 runs to the upper limit position of the hoistway 7, the upper right corner of the car top guardrail 1 in the unfolded state will not interfere with (there is a gap and will not collide with) the control panel door 82 in the closed state, and the upper right corner of the car top guardrail 1 in the unfolded state will be on the path of the control panel door 82 opening with the control panel main body 81 and will interfere with the opening of the control panel door 82;

[0071] When the car 9 runs to the upper limit position of the hoistway 7, the upper right corner of the car top guardrail 1 in the folded state will not interfere with (there is a gap and will not collide with) the control panel door 82 in the closed state, and the upper right corner of the car top guardrail 1 in the folded state is not on the path of the control panel door 82 opening with the control panel main body 81 and will not interfere with the opening of the control panel door 82.

[0072] Preferably, a safety circuit is provided on the control panel door 82. When the control panel door 82 opens, the drive power supply circuit of the elevator traction machine is powered off and the elevator cannot operate.

[0073] Preferably, a rear baffle 6 is installed on the hoistway, the control panel bracket or other components to ensure that after the car top guardrail is folded, the distance from the edge of the car top guardrail to the hoistway wall meets the maximum distance requirement of GB7588 8.13.3.2 of the national standard.

[0074] In the elevator system of the first embodiment, a corner of the car top guardrail 1 corresponding to the control panel 8 in the hoistway 7 can be folded inward. During maintenance, this corner of the car top guardrail 1 can be folded inward first to facilitate opening the control panel door 82. After the control panel door 82 is opened, then unfold this corner of the car top guardrail 1 for maintenance. While meeting the requirements of workers for elevator maintenance operations, it can reduce the requirement of the elevator for the top floor height, as Figure 5 shown.

[0075] Embodiment 2

[0076] Based on the elevator system of the first embodiment, as Figure 3 shown, the upper guardrail of the rear frame of the car top guardrail 1 includes a rear upper fixed section 11 and a rear upper movable section 12;

[0077] A round hole is provided at the left end of the rear upper movable section 12, and a long hole is provided between the right end of the rear upper movable section 12 and the round hole;

[0078] The upper guardrail of the right frame of the car top guardrail 1 includes a right upper fixed section 21 and a right upper movable section 22;

[0079] Round holes are respectively provided at the front and rear ends of the right upper movable section 22;

[0080] The rear upper movable section 12 is connected to the right end of the rear upper fixed section 11 by passing a first rivet 31 through the round hole at the left end of the rear upper movable section 12, and the rear upper movable section 12 can rotate around the first rivet 31;

[0081] The rear upper movable section 12 is connected to the right upper movable section 22 by passing a second rivet 32 through the long hole of the rear upper movable section 12 and the round hole at the rear end of the right upper movable section 22, and the right upper movable section 22 can rotate around the second rivet 32, and the second rivet 32 can move left and right along the long hole;

[0082] The right upper movable section 22 is connected to the rear end of the rear right upper fixed section 21 by passing a third rivet 33 through the round hole at the front end of the right upper movable section 22, and the right upper movable section 22 can rotate around the third rivet 33;

[0083] When the car top guardrail 1 is unfolded, the second rivet 32 moves to the right end of the long hole, and the rear upper movable section 12 is perpendicular to the right upper movable section 22;

[0084] When the car top guardrail is folded, the second rivet 32 moves to the left end of the long hole, and the included angle between the rear upper movable section 12 and the right upper movable section 22 gradually increases from 90° until 180°.

[0085] Preferably, the connection structure between the lower guardrail of the rear frame and the lower guardrail of the right frame of the car top guardrail 1 is the same as the connection structure between the upper guardrail of the rear frame and the upper guardrail of the right frame of the car top guardrail 1.

[0086] In the elevator system of the second embodiment, the car top guardrail has a simple structure and is convenient to fold inward at one corner.

[0087] Embodiment Three

[0088] Based on the elevator system of the first embodiment, the car top guardrail 1 further includes a triangular positioning plate 5;

[0089] As Figure 4 shown, at least two positioning holes 51 arranged left and right are provided at the rear part of the triangular positioning plate 5;

[0090] The right side of the triangular positioning plate 5 is fixedly connected to the upper side of the upper right movable section 22;

[0091] When the car top guardrail 1 is unfolded, the positioning hole at the leftmost end of the rear part of the triangular positioning plate 5 corresponds to the long hole, and the triangular positioning plate 5 is fixedly connected to the rear upper movable section 12 through the square neck bolt plus wing nut assembly 4 to complete the unfolding and locking;

[0092] When the car top guardrail is folded inward to the maximum extent, the positioning hole at the rightmost end of the rear part of the triangular positioning plate 5 corresponds to the long hole, and the triangular positioning plate 5 is fixedly connected to the rear upper movable section 12 through the square neck bolt plus wing nut assembly 4 to complete the maximum extent folding and locking.

[0093] Preferably, the right side of the triangular positioning plate 5 is fixedly connected to the upper side of the upper right movable section 22 by welding.

[0094] In the elevator system of the third embodiment, after removing the square neck bolt + wing nut assembly, the rear upper movable section 12 and the upper right movable section 22 can rotate around the first rivet 31 and the second rivet 32 respectively, and the upper movable section 12 and the upper right movable section 22 slide in the long hole by using the third rivet 32 to keep the overall structure of the guardrail stable. After folding, it is locked and fixed by reinstalling the square neck bolt + wing nut. The positioning holes of the triangular positioning plate provide locking and positioning for the guardrail during unfolding and folding respectively.

[0095] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An elevator system, characterized in that, It includes a car (9), a control panel (8), a hoistway (7), and a car top guardrail (1); The control panel (8) is installed on the right side wall at the upper right rear corner of the hoistway (7) for controlling the operation of the elevator; The control panel (8) includes a control panel main body (81) and a control panel door (82); A vertical hinge shaft is provided on the side of the control panel main body (81) near the right rear corner of the hoistway; The rear end of the control panel door (82) is hinged to the control panel main body (81) through the hinge shaft. When the control panel door (81) rotates around the vertical hinge shaft towards the rear side wall of the hoistway (7), the control panel door (82) opens together with the control panel main body (81); when the control panel door (82) rotates around the vertical hinge shaft towards the right side wall of the hoistway (7), the control panel door (82) closes with the control panel main body (81); The car (9) moves up and down in the hoistway (7); The car top guardrail (1) is fixed on the car top; The car top guardrail (1) has two states: unfolded and folded; In the unfolded state, the car top guardrail (1) is a cuboid surrounded by four frames in the front, rear, left, and right; When the car (9) runs to the upper limit position of the hoistway (7), the upper right corner of the car top guardrail (1) in the unfolded state will not interfere with the control panel door (82) in the closed state, and the upper right corner of the car top guardrail (1) in the unfolded state will be on the path where the control panel door (82) opens with the control panel main body (81), interfering with the opening of the control panel door (82); When the car (9) runs to the upper limit position of the hoistway (7), the upper right corner of the car top guardrail (1) in the folded state will not interfere with the control panel door (82) in the closed state, and the upper right corner of the car top guardrail (1) in the folded state is not on the path where the control panel door (82) opens with the control panel main body (81), and there is no interference with the opening of the control panel door (82); The upper guardrail of the rear frame of the car top guardrail (1) includes a rear upper fixed section (11) and a rear upper movable section (12); A round hole is provided at the left end of the rear upper movable section (12), and a long hole is provided between the right end of the rear upper movable section (12) and the round hole; The upper guardrail of the right frame of the car top guardrail (1) includes a right upper fixed section (21) and a right upper movable section (22); Round holes are provided at the front and rear ends of the right upper movable section (22) respectively; The rear upper movable section (12) is connected to the right end of the rear upper fixed section (11) through the round hole at the left end of the rear upper movable section (12) by a first rivet (31), and the rear upper movable section (12) can rotate around the first rivet (31); The rear upper movable section (12) is connected to the right upper movable section (22) by passing a second rivet (32) through the long hole of the rear upper movable section (12) and the round hole at the rear end of the right upper movable section (22). The right upper movable section (22) can rotate around the second rivet (32), and the second rivet (32) can move left and right along the long hole; The right upper movable section (22) is connected to the rear end of the right upper fixed section (21) through the round hole at the front end of the right upper movable section (22) by a third rivet (33), and the right upper movable section (22) can rotate around the third rivet (33); When the car top guardrail (1) is unfolded, the second rivet (32) moves to the right end of the long hole, and the rear upper movable section (12) is perpendicular to the upper right movable section (22); When the car top guardrail is folded, the second rivet (32) moves towards the left end of the long hole, and the angle between the rear upper movable section (12) and the upper right movable section (22) gradually increases from 90 0 to 180 0 .

2. The elevator system according to claim 1, wherein A safety circuit is provided on the control panel door (82). When the control panel door (82) is opened, the drive power supply circuit of the elevator traction machine is powered off.

3. The elevator system according to claim 1, wherein The connection structure between the lower guardrail of the rear frame and the lower guardrail of the right frame of the car top guardrail (1) is the same as the connection structure between the upper guardrail of the rear frame and the upper guardrail of the right frame of the car top guardrail (1).

4. The elevator system according to claim 1, wherein The car top guardrail (1) further includes a triangular positioning plate (5); At least two positioning holes arranged left and right are provided at the rear of the triangular positioning plate (5); The right side of the triangular positioning plate (5) is fixedly connected to the upper side of the upper right movable section (22); When the car top guardrail (1) is unfolded, the positioning hole at the leftmost end of the rear of the triangular positioning plate (5) corresponds to the long hole, and the triangular positioning plate (5) is fixed to the rear upper movable section (12) through a square neck bolt plus a wing nut assembly (4) to complete the unfolding and locking; When the car top guardrail is folded inward to the maximum extent, the positioning hole at the rightmost end of the rear of the triangular positioning plate (5) corresponds to the long hole, and the triangular positioning plate (5) is fixed to the rear upper movable section (12) through a square neck bolt plus a wing nut assembly (4) to complete the maximum extent folding and locking.

5. The elevator system according to claim 4, wherein The right side of the triangular positioning plate (5) is fixedly connected to the upper side of the upper right movable section (22) by welding.

6. A car top guardrail is surrounded by four frames in the front, rear, left and right. It is characterized in that The upper guardrail of the rear frame of the car top guardrail includes a rear upper fixed section (11) and a rear upper movable section (12); A round hole is provided at the left end of the rear upper movable section (12), and a long hole is provided between the right end of the rear upper movable section (12) and the round hole; The upper guardrail of the right frame of the car top guardrail (1) includes an upper right fixed section (21) and an upper right movable section (22); A round hole is provided at each of the front and rear ends of the upper right movable section (22); The rear upper movable section (12) is connected to the right end of the rear upper fixed section (11) by passing the first rivet (31) through the round hole at the left end of the rear upper movable section (12), and the rear upper movable section (12) can rotate around the first rivet (31); The rear upper movable section (12) is connected to the upper right movable section (22) by passing the second rivet (32) through the long hole of the rear upper movable section (12) and the round hole at the rear end of the upper right movable section (22). The upper right movable section (22) can rotate around the second rivet (32), and the second rivet (32) can move left and right along the long hole; The upper right movable section (22) is connected to the rear end of the upper right fixed section (21) by passing the third rivet (33) through the round hole at the front end of the upper right movable section (22), and the upper right movable section (22) can rotate around the third rivet (33); When the car top guardrail (1) is unfolded, the second rivet (32) moves to the right end of the long hole, and the rear upper movable section (12) is perpendicular to the upper right movable section (22); When the car top guardrail is folded, the second rivet (32) moves towards the left end of the long hole, and the angle between the rear upper movable section (12) and the upper right movable section (22) gradually increases from 90 0 to 180 0 .

7. The car top guardrail according to claim 6, wherein the connection structure between the lower rear guardrail and the lower right guardrail of the car top guardrail (1) is the same as the connection structure between the upper rear guardrail and the upper right guardrail of the car top guardrail (1).

8. The car top guardrail according to claim 7, wherein the car top guardrail (1) further comprises a triangular positioning plate (5); at least two positioning holes arranged left and right are provided at the rear part of the triangular positioning plate (5); the right side of the triangular positioning plate (5) is fixedly connected to the upper side of the upper right movable section (22); when the car top guardrail (1) is unfolded, the positioning hole at the leftmost end of the rear part of the triangular positioning plate (5) corresponds to the long hole, and the triangular positioning plate (5) is fixed to the upper rear movable section (12) by a square neck bolt plus a wing nut assembly (4) to complete the unfolding and locking; when the car top guardrail is folded inward to the maximum extent, the positioning hole at the rightmost end of the rear part of the triangular positioning plate (5) corresponds to the long hole, and the triangular positioning plate (5) is fixed to the upper rear movable section (12) by a square neck bolt plus a wing nut assembly (4) to complete the maximum extent folding and locking.

9. The car top guardrail according to claim 8, wherein the right side of the triangular positioning plate (5) is fixedly welded to the upper side of the upper right movable section (22).

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