CN116177462A - Working personnel lifting platform for high-altitude operation - Google Patents

Abstract

The invention relates to the technical field of lifting platforms, in particular to a staff lifting platform for high-altitude operations; it includes: a second-type chassis; There is a mounting frame; it also includes: a telescopic mechanism, the telescopic mechanism is hinged on the mounting frame and rotates around a horizontal axis on the mounting frame, an angle adjustment oil cylinder is arranged between the telescopic mechanism and the mounting frame, and the telescopic end of the telescopic mechanism A mounting plate is fixed, and a fixed shaft parallel to the telescopic mechanism is fixed on the mounting plate. A manned fence is hinged at the end of the fixed shaft. A hydraulic cylinder for the balance of the manned fence; the invention can adjust the state in real time when the manned fence is in a tilted state, ensuring that the manned fence is always in a vertical state, avoiding the discomfort of the staff when riding on the manned fence, and improving the comfort of the staff when riding the manned fence. comfort.

Description

A staff lifting platform for working at heights

technical field

The invention relates to the technical field of railway maintenance platforms, in particular to a staff lifting platform for aerial work.

Background technique

my country's urban subways and high-speed rails are developing rapidly, and the demand for construction and maintenance of rail transit sites has increased, which has led to the expansion of the aerial work vehicle market. However, in order to adapt to the on-site environment of rail transit, rail transit currently uses electric drive, and there are high-voltage cables on both sides of the track, which requires the aerial work vehicle to be able to operate on the track and meet the small requirements of the aerial work site.

The patent application number is 202120551347.0, which proposes a road-rail dual-purpose aerial work vehicle based on the modification of the second-class chassis. The lower part of the second-class chassis is equipped with two sets of front and rear guide devices, and the rear part of the second-class chassis is equipped with a high-altitude operation at the front of the frame. Platform, high-altitude operation slewing platform is equipped with an aerial work arm, and the front and rear two sets of guiding devices include a pair of guide wheels, down extension arms and down extension drive mechanisms. The guide wheels are set at the bottom of the down extension arm, and the upper end of the down extension arm is hinged Below the second type of chassis, the down extension driving structure drives the down extension boom to rise, and the aerial work rotary platform includes the lower base rotating disk, the middle rotating platform and the upper aerial work arm fixing seat. This track aerial work vehicle adopts a general-purpose second-class chassis and is equipped with a front and rear guide system for railways, so that both roads and railways can work at high altitudes.

This prior art realizes the adjustment of the fence-type work platform by adjusting the hydraulic cylinder of the work platform, but during operation, the operator needs to observe the state of the fence-type work platform, and then adjust the adjustment of the work platform to adjust the hydraulic cylinder according to the state of the fence-type work platform. The amount of expansion and contraction requires the cooperation of multiple people in actual use, and it is difficult to achieve single-person operation, which in turn causes additional labor costs.

For this reason, the present invention proposes a kind of staff lifting platform for aerial work.

Contents of the invention

The object of the present invention is to provide a worker's lifting platform for working at heights to solve at least one technical problem in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A staff lifting platform for working at heights, comprising:

Class II chassis;

A rotating disk, the rotating disk is installed on the top of the second type chassis close to the front of the car, and the top of the rotating disk is fixed with a mounting bracket;

Also includes:

Telescopic mechanism, the telescopic mechanism is hinged on the mounting frame, and rotates around a horizontal axis on the mounting frame, an angle adjustment oil cylinder is arranged between the telescopic mechanism and the mounting frame, and the telescopic end of the telescopic mechanism is fixed with a mounting A fixed shaft parallel to the telescopic mechanism is fixed on the mounting plate, and a manned fence is hinged at the end of the fixed shaft, and a manned fence for holding the manned fence is hinged between the manned fence and the mounting plate. Balanced hydraulic cylinder.

Further, the staff lifting platform also includes:

A balance detection mechanism, the balance detection mechanism includes a detection box installed at the bottom of the manned fence, the inside of the detection box is rotated and installed with a swing arm, the lower end of the swing arm is fixed with a gravity ball, the two sides of the swing arm An arc-shaped rod is fixed, and arc-shaped tubes corresponding to the arc-shaped rod are fixed on both sides inside the detection box, and contact switches for controlling the opening and closing of the oil circuit of the hydraulic cylinder are respectively fixed on the inner walls of the two arc-shaped tubes , when the swing arm is in a vertical state, the arc rod is not in contact with the contact switch.

Further, the balance detection mechanism also includes a PLC controller, and the PLC controller is connected with the contact switch, the hydraulic pump of the hydraulic cylinder, and the solenoid valve for controlling the opening and closing of the oil circuit of the hydraulic cylinder. When the swing arm swings to the left , the arc-shaped rod presses one of the contact switches, and the piston end of the hydraulic cylinder extends; when the swing arm swings to the right, the arc-shaped rod presses the other contact switch, and the piston end of the hydraulic cylinder shorten.

Further, the telescoping mechanism is an air cylinder, a hydraulic cylinder or an electric push rod.

Further, the staff lifting platform also includes at least two groups of railway track running mechanisms arranged at the bottom of the second-type chassis, and the railway track running mechanism includes a lifting cylinder fixed at the bottom of the second-type chassis, and the piston end of the lifting cylinder A deceleration motor is fixed, an output shaft is fixed at the output end of the deceleration motor, and a track traveling wheel is fixed on the output shaft.

Further, a support shaft is symmetrically fixed on the side of the installation plate close to the telescopic mechanism, and a guide mechanism for slidingly supporting the support shaft is fixed on the telescopic mechanism.

Further, the guide mechanism includes two semi-arc hoops, the two semi-arc hoops are fixedly connected to the telescoping mechanism by bolts, and the semi-arc hoops are provided with a support shaft for sliding Through guide ring.

Further, the inner bottom wall of the manned fence is provided with a supporting air bag, and the top of the supporting air bag is provided with a supporting platform, and the lower inner wall of the guide ring under the telescoping mechanism is provided with an arc-shaped groove. An arc-shaped air bag is arranged inside the arc-shaped groove, and the supporting air bag communicates with the arc-shaped air bag through a pipeline.

Further, the four corners of the support platform are provided with round holes, and guide posts are slidably arranged in the round holes, and the lower ends of the guide posts are fixed on the bottom wall of the manned fence.

Further, an opening is provided on the front of the manned fence, and a gate is hinged on the opening.

Compared with prior art, the beneficial effect of the present invention is:

1. In the present invention, when the angle adjustment oil cylinder is in operation, the telescopic mechanism can be lifted upwards, thereby increasing the overall height of the manned fence, and the telescopic mechanism can also be moved downwards, thereby making the manned fence close to the ground, which is convenient for the staff to go up , when the manned fence is close to the ground, the overall height of the application is low, which will not cause the problem of super height, and the overall height is lower than the height of the front of the vehicle, so that the height limit can be avoided to hinder walking.

2. In the present invention, when the angle adjustment oil cylinder runs and extends, the telescopic mechanism can be lifted upwards. At this time, the manned fence swings to the right, and the gravity ball is always in a vertical state under the action of gravity. At this time, the second switch is triggered, the hydraulic cylinder at this time is shortened, so that the manned fence swings to the left until the second switch is not pressed, and the manned fence is in a vertical state at this time; Move down, at this time, the manned fence turns to the left, and the gravity ball is always in a vertical state under the action of gravity. At this time, the first switch is pressed and triggered, and the hydraulic cylinder is extended at this time. In this way, the manned fence Rotate to the right until the first switch is not pressed, at this moment the manned fence is in a vertical state.

Description of drawings

FIG. 1 is a schematic structural view of Embodiment 1 of the present invention;

Fig. 2 is a schematic structural diagram of the balance detection mechanism in Fig. 1;

Fig. 3 is a partially enlarged view of part A in Fig. 2;

Fig. 4 is the structural representation of railway track traveling mechanism in Fig. 1;

5 is a schematic structural diagram of Embodiment 2 of the present invention;

Fig. 6 is a schematic structural view of the guide mechanism in Fig. 5;

Fig. 7 is a structural schematic diagram of removing the gate of the manned fence in Fig. 5

Fig. 8 is a schematic diagram of the structure when the telescopic mechanism is put down in Fig. 5;

Fig. 9 is a schematic diagram of the shortened structure of the fixed shaft and the hydraulic cylinder in Fig. 8 .

In the picture:

1. Class II chassis; 2. Railway track running mechanism; 201. Geared motor; 202. Lifting cylinder; 203. Output shaft; 204. Track wheel; 3. Turning disc; 4. Mounting frame; 6. Telescopic mechanism; 7. Angle adjustment cylinder; 8. Mounting plate; 9. Fixed shaft; 10. Hydraulic cylinder; 11. Manned fence; 1101. Gate; Support platform; 12, balance detection mechanism; 1201, detection box; 1202, PLC controller; 1203, gravity ball; 1204, rotating shaft; 1205, swing arm; 1206, fixed frame; 1209, the first switch; 1210, the second switch; 1211, the rubber cap; 13, the support shaft; 14, the guide mechanism; 1401, the semi-arc hoop; 1402, the guide ring; Curved air pockets.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Referring to Fig. 1 to Fig. 9, the present invention provides a technical solution:

Example 1

As shown in Figure 1, a worker's lifting platform for aerial work includes a second-class chassis 1 and a rotating disk 3, the rotating disk 3 is installed on the top of the second-class chassis 1 near the front of the vehicle, and the top of the rotating disk 3 is fixed with a mounting bracket 4; also include telescopic mechanism 6, telescopic mechanism 6 is hinged on the mounting frame 4, and rotates around a horizontal axis on the mounting frame 4, an angle adjustment oil cylinder 7 is arranged between the telescopic mechanism 6 and the mounting frame 4, and the telescopic mechanism 6 stretches A mounting plate 8 is fixed at the end, and a fixed shaft 9 parallel to the telescopic mechanism 6 is fixed on the mounting plate 8. The end of the fixed shaft 9 is hinged with a manned fence 11, and a manned fence 11 is hinged with the mounting plate 8. The hydraulic cylinder 10 balanced by the human fence 11 is worth noting that a counterweight 5 is installed on the side of the installation frame 4 away from the telescopic mechanism 6 for balancing the weight of the telescopic mechanism 6. It is also worth noting that the rotating disk 3 Its rotation is driven by a driving mechanism. The common driving mechanism includes a rotary oil cylinder and a driving motor, and cooperates with a gear transmission mechanism to realize the rotation of the rotating disk 3. The rotation of the rotating disk 3 is a prior art, and its specific structure will not be described here;

When the angle adjustment oil cylinder 7 is in operation, the telescopic mechanism 6 can be lifted up, and the overall height of the manned fence 11 can be improved, and the telescopic mechanism 6 can also be moved downward, so that the manned fence 11 is close to the ground, which is convenient for the staff Going up, when the manned fence 11 is close to the ground, the overall height of the application is low, which will not cause the problem of super height, as shown in Figure 8 and Figure 9, the overall height is lower than the height of the front of the vehicle, and the height limit can be avoided. place hinders walking;

When the telescopic mechanism 6 is operated, the telescopic end of the telescopic mechanism 6 can be extended or shortened, further improving the working range of the manned fence 11, making it convenient for the staff to carry out high-altitude operations and meet different height requirements;

As described above, after the angle adjustment cylinder 7 is in operation, the manned fence 11 needs to be in a vertical state all the time, because once the manned fence 11 is in a tilted state, the staff inside it may slip down and cause danger. For this reason, this The application states that when the manned fence 11 is in a tilted state, the state can be adjusted in real time to ensure that the manned fence 11 is always in a vertical state, avoiding the discomfort of the staff when riding on it, and improving the comfort of the staff riding on the manned fence 11 .

In a specific embodiment of the present invention, as shown in Figure 2 and Figure 3, the staff lifting platform also includes:

Balance detection mechanism 12, balance detection mechanism 12 comprises the detection box 1201 that is installed on the bottom of manned fence 11, and the inner rotation of detection box 1201 is equipped with swing arm 1205, is specifically fixed with rotating shaft 1204 inside detection box 1201, and swing arm The upper end of 1205 has a mounting sleeve, and the mounting sleeve is rotatably mounted on the rotating shaft 1204 in conjunction with the bearing. The lower end of the swing arm 1205 is fixed with a gravity ball 1203. Both sides of the swing arm 1205 are fixed with arc rods 1208. The inner sides of the detection box 1201 are An arc tube 1207 corresponding to the arc rod 1208 is fixed, specifically a fixing frame 1206 is fixed on the inner top of the detection box 1201, and the fixing frame 1206 is fixedly connected with the arc tube 1207, and the inner walls of the two arc tubes 1207 are respectively A contact switch for controlling the opening and closing of the oil circuit of the hydraulic cylinder 10 is fixed. When the swing arm 1205 is in a vertical state, the arc rod 1208 is not in contact with the contact switch; it is worth noting that, for better distinction, the contact switch is divided into Two, the right one is the first switch 1209, the left one is the second switch 1210, and the first switch 1209 and the second switch 1210 are also covered with rubber caps 1211, and the first switch 1209 and the second switch 1210 play a role Protective effects;

When the angle adjustment oil cylinder 7 runs and stretches, the telescopic mechanism 6 can be lifted upwards. Now the manned fence 11 swings to the right, and the gravity ball 1203 is always in a vertical state under the action of gravity. The second switch now 1210 is triggered, and now the hydraulic cylinder 10 is shortened, so that the manned fence 11 swings to the left until the second switch 1210 is not pressed, and now the manned fence 11 is in a vertical state; when the angle adjustment oil cylinder 7 runs shortened , the telescopic mechanism 6 can be moved downwards. At this time, the manned fence 11 turns to the left, and the gravity ball 1203 is always in a vertical state under the action of gravity. At this time, the first switch 1209 is pressed and triggered. The hydraulic cylinder 10 is extended, and like this, the manned fence 11 rotates to the right until the first switch 1209 is not pressed, and now the manned fence 11 is in a vertical state.

It is also worth noting that the fixed shaft 9 is located above the hydraulic cylinder 10, which can ensure that the fulcrum of the manned fence 11 is on the upper side. A certain stable state, at least it will not fall over, thus ensuring the safety of the staff.

Further, as shown in Figure 2 and Figure 3, the balance detection mechanism 12 also includes a PLC controller 1202, the PLC controller 1202 is connected with the contact switch, the hydraulic pump of the hydraulic cylinder, and the solenoid valve for controlling the opening and closing of the oil circuit of the hydraulic cylinder 10, When the swing arm 1205 swings to the left (relative swing), the arc rod 1208 presses one of the contact switches (the second switch 1210), and the piston end of the hydraulic cylinder 10 is extended; when the swing arm 1205 swings to the right (relative swing) , the arc rod 1208 presses another contact switch (the first switch 1209), and the piston end of the hydraulic cylinder 10 shortens.

Further, the telescopic mechanism 6 is an air cylinder, a hydraulic cylinder or an electric push rod, and the telescopic mechanism 6 is preferably a hydraulic cylinder.

In a specific embodiment of the present invention, as shown in Figure 4, the staff lifting platform also includes at least two groups of railway track running mechanisms 2 arranged at the bottom of the second type chassis 1, and the railway track running mechanisms 2 include The lift cylinder 202 at the bottom of the chassis 1, the piston end of the lift cylinder 202 is fixed with a geared motor 201, the output end of the geared motor 201 is fixed with an output shaft 203, and the output shaft 203 is fixed with a track wheel 204;

The present application uses the railway track running mechanism 2 to walk on the rails, and then installs or maintains high-altitude objects near the rails. In specific use, the car body equipped with the second-class chassis 1 is driven onto the rails, and then the lifting cylinder 202 is operated. At this time, the track traveling wheel 204 is placed on the corresponding rail, and the running deceleration motor 201 can drive the car body to move, so as to realize object construction on the rail.

When the present application is in use, drive the car body carrying the second-class chassis 1 onto the rail, and then run the lifting cylinder 202. At this time, put the rail travel wheel 204 on the corresponding rail, and run the reduction motor 201 to drive the car body to move. , to realize the construction of objects on the rails, when the angle adjustment oil cylinder 7 is in operation, the telescopic mechanism 6 can be lifted up, and then the overall height of the manned fence 11 can be improved, and the telescopic mechanism 6 can also be moved downward, so that the manned The fence 11 is close to the ground, which is convenient for the staff to go up; when the angle adjustment oil cylinder 7 runs and stretches, the telescopic mechanism 6 can be lifted upwards. In the vertical state, the second switch 1210 is triggered at this time, and the hydraulic cylinder 10 is shortened at this time, so that the manned fence 11 swings to the left until the second switch 1210 is not pressed, and now the manned fence 11 is in the vertical state. state; when the angle adjustment oil cylinder 7 runs shortened, the telescopic mechanism 6 can be moved downwards, and now the manned fence 11 turns to the left, and the gravity ball 1203 is always in a vertical state under the action of gravity. A switch 1209 is pressed and triggered, and now the hydraulic cylinder 10 is extended, and like this, the manned fence 11 turns rightward until the first switch 1209 is not pressed, and now the manned fence 11 is in a vertical state.

Example 2

On the technical scheme basis of above-mentioned embodiment 1, increase following technical scheme:

As shown in Figure 5, the mounting plate 8 is symmetrically fixed with a support shaft 13 near the side of the telescopic mechanism 6, and the telescopic mechanism 6 is fixed with a guide mechanism 14 for slidingly supporting the support shaft 13, and the support shaft 13 can improve the stability of the telescopic mechanism 6 To avoid the risk of shaft breakage due to the overload of the telescopic mechanism 6, when the telescopic end of the telescopic mechanism 6 is stretched or shortened, the support shaft 13 always slides in the guide mechanism 14 to provide a certain supporting effect, thereby improving The overall security of this application.

In a specific embodiment of the present invention, as shown in FIG. 6 , the guide mechanism 14 includes two semi-arc hoops 1401, and the two semi-arc hoops 1401 are fixedly connected to the telescopic mechanism 6 by bolts. The hoop 1401 is provided with a guide ring 1402 for the sliding penetration of the support shaft 13. During installation, it is fixed on the housing of the telescopic mechanism 6 through two semi-arc hoops 1401 with bolts and nuts. The two support shafts 13 make this The stability of the application is stronger.

In a specific embodiment of the present invention, as shown in Figure 7, the inner bottom wall of the manned fence 11 is provided with a support air bag 1103, the top of the support air bag 1103 is provided with a support platform 1104, and the guide ring 1402 below the telescopic mechanism 6 The lower inner wall of the through hole is provided with an arc-shaped groove 1403, and the inside of the arc-shaped groove 1403 is provided with an arc-shaped air bag 1404, and the support air bag 1103 and the arc-shaped air bag 1404 are connected through a pipeline; when the staff and tools are on the support platform 1104 , the gravity action will compress the support air bag 1103, so that the gas inside the support air bag 1103 enters the arc-shaped air bag 1404 through the pipeline, and the arc-shaped air bag 1404 can support the support shaft 13 below the telescopic mechanism 6, just in line with the staff and The gravity of the tool is partially offset to avoid the downward deviation of the telescopic end of the telescopic mechanism 6, which improves the stability and service life of the telescopic mechanism 6, and avoids the problem of wear caused by the increase of friction with the shell due to excessive downward deviation .

In the specific embodiment of the present invention, as shown in Figure 7, the four corners of the supporting platform 1104 are provided with round holes, and guide posts 1102 are slidably arranged in the round holes, and the lower ends of the guide posts 1102 are fixed on the manned fence 11. The bottom wall of the bottom wall, the guide column 1102 can play a guiding role to prevent the support platform 1104 from shaking.

In a specific embodiment of the present invention, as shown in FIG. 1 , an opening is provided on the front of the manned fence 11, and a gate 1101 is hinged on the opening, and the gate 1101 is opened to facilitate the entry of staff.

As shown in Figure 9, the lengths of the fixed shaft 9 and the hydraulic cylinder 10 of the present application can be customized according to requirements, for example, the length of the fixed shaft 9 and the hydraulic cylinder 10 of the present application shown in Figure 9 is shortened, which can avoid the overall length of the application from being too long The problem of improving the scope of application of the present application.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (10)

1. A staff lifting platform for aerial work, comprising: Class II chassis (1); A rotating disk (3), the rotating disk (3) is installed on the top of the second type chassis (1) near the front of the vehicle, and the top of the rotating disk (3) is fixed with a mounting bracket (4); It is characterized in that it also includes: telescopic mechanism (6), the telescopic mechanism (6) is hinged on the mounting frame (4), and rotates around a horizontal axis on the mounting frame (4), the telescopic mechanism (6) and the mounting frame (4) An angle adjustment oil cylinder (7) is arranged between them, and a mounting plate (8) is fixed on the telescopic end of the telescopic mechanism (6), and a fixed shaft parallel to the telescopic mechanism (6) is fixed on the mounting plate (8). 9), the end of the fixed shaft (9) is hinged with a manned fence (11), and a manned fence (11) is hinged between the manned fence (11) and the mounting plate (8) for maintaining the manned fence (11). ) balanced hydraulic cylinder (10). 2. A staff lifting platform for aerial work according to claim 1, characterized in that: the staff lifting platform further comprises: A balance detection mechanism (12), the balance detection mechanism (12) includes a detection box (1201) installed at the bottom of the manned fence (11), and a swing arm (1205) is installed on the inner rotation of the detection box (1201), The lower end of the swing arm (1205) is fixed with a gravity ball (1203), the two sides of the swing arm (1205) are fixed with arc rods (1208), and the inner sides of the detection box (1201) are fixed with The arc tubes (1207) corresponding to the arc rods (1208), the inner walls of the two arc tubes (1207) are respectively fixed with contact switches for controlling the opening and closing of the oil circuit of the hydraulic cylinder (10), when the swing arm ( When 1205) is in the vertical state, the arc-shaped rod (1208) does not contact the contact switch. 3. A staff lifting platform for aerial work according to claim 2, characterized in that: the balance detection mechanism (12) also includes a PLC controller (1202), and the PLC controller (1202) is connected to the contactor The switch, the hydraulic pump of the hydraulic cylinder, and the solenoid valve that controls the opening and closing of the oil circuit of the hydraulic cylinder (10) are connected. When the swing arm (1205) swings to the left, the arc rod (1208) presses one of the contact switches, The piston end of the hydraulic cylinder (10) is extended; when the swing arm (1205) swings to the right, the arc rod (1208) presses another contact switch, and the piston end of the hydraulic cylinder (10) shorten. 4. A staff lifting platform for aerial work according to claim 3, characterized in that: the telescopic mechanism (6) is an air cylinder, a hydraulic cylinder or an electric push rod. 5. A staff lifting platform for aerial work according to claim 3, characterized in that: said staff lifting platform also includes at least two groups of railway track running mechanisms (2) arranged at the bottom of the second type chassis (1) ), the railway track running mechanism (2) includes a lift cylinder (202) fixed on the bottom of the second type of chassis (1), the piston end of the lift cylinder (202) is fixed with a reduction motor (201), and the reduction motor The output end of (201) is fixed with output shaft (203), and track traveling wheel (204) is fixed on described output shaft (203). 6. A staff lifting platform for aerial work according to claim 5, characterized in that: the side of the mounting plate (8) close to the telescopic mechanism (6) is symmetrically fixed with a support shaft (13), the A guide mechanism (14) for slidingly supporting the support shaft (13) is fixed on the telescopic mechanism (6). 7. A staff lifting platform for working at heights according to claim 6, characterized in that: the guide mechanism (14) includes two semi-arc clamps (1401), and the two semi-arc clamps The hoop (1401) is fixedly connected to the telescoping mechanism (6) by bolts, and the semi-arc hoop (1401) is provided with a guide ring (1402) for the support shaft (13) to slide through. 8. A staff lifting platform for aerial work according to claim 7, characterized in that: the inner bottom wall of the manned fence (11) is provided with a supporting air bag (1103), and the supporting air bag ( 1103) is provided with a supporting platform (1104) on the top, and the lower inner wall of the guide ring (1402) under the telescopic mechanism (6) is provided with an arc-shaped groove (1403), and the inside of the arc-shaped groove (1403) is provided with There is an arc-shaped air bag (1404), and the support air bag (1103) communicates with the arc-shaped air bag (1404) through a pipeline. 9. A staff lifting platform for working at heights according to claim 8, characterized in that: four corners of the support platform (1104) are provided with round holes, and guides are slidably arranged in the round holes Column (1102), the lower end of the guide column (1102) is fixed on the bottom wall of the manned fence (11). 10. A staff lifting platform for working at heights according to claim 1, characterized in that: the front of the manned fence (11) is provided with an opening, and a gate (1101) is hinged on the opening .

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