CN116335378A - Liftable scaffold and its construction method - Google Patents

Abstract

The invention relates to a liftable scaffold, which includes a horizontal workbench and a support frame installed on both sides of the workbench. The support frame includes two longitudinal rods. A sliding part is slidably installed on the longitudinal bar. The upper end of the first sliding part is provided with a raised support block. The four corners of the horizontal workbench are buckled on the support block. The bottom of the workbench is equipped with a card slot for the adapter block, and the horizontal workbench is installed on the support block by buckling the block into the card slot; the invention realizes the lifting of the workbench through a single power source, ensuring synchronization consistency and facilitating operation Personnel stand on the workbench to operate. Utilizing the characteristics of the anti-drop mechanism, it acts as a climbing fulcrum in the locked state, so that the workbench can rise and fall stably under the activation of the power device, which improves the operating efficiency. The lifting structure of the workbench can achieve cross-layer arrival or discharge, which is very convenient for the erection of multi-layer scaffolding.

Description

Liftable scaffold and its construction method

technical field

The invention relates to the technical field of scaffolding, in particular to a liftable scaffolding.

Background technique

As a construction tool, scaffolding is designed to provide a safe platform for operators, thus making the construction process more efficient and safe. Various types of scaffolds have appeared on the market, such as traditional erected scaffolds, mobile scaffolds and liftable scaffolds.

In the traditional erection scaffolding, it is necessary to install supporting legs, beams and other components one by one. The construction process is cumbersome and there are potential safety hazards. Mobile scaffolding can be moved at any time by installing casters, but its stability is average and it is only suitable for small construction areas. The liftable scaffold is a kind of scaffold with lifting function, which can be adjusted in height according to the needs, which improves the construction efficiency, but the overall structure of the liftable scaffold is usually heavier than the traditional erected scaffold and mobile scaffold, which is mainly due to Its lifting mechanism and supporting structure cannot be easily disassembled.

First of all, the lifting mechanism of the liftable scaffold includes components such as lifting rods, ratchet racks, gears, and motors. These components need to be connected together through connectors to form a complex lifting mechanism. Secondly, the liftable scaffold needs to be provided with stabilizers and fixtures on the base frame to improve its stability, and these additional structures will also increase the weight and complexity of the entire scaffold.

Chinese patent CN205804909U discloses a liftable scaffold, which includes an underframe and a horizontal ladder arranged on the top of the underframe. The chassis is composed of four vertical support legs and tie rods connected between the four support legs. Wherein, a lifting rod is arranged inside the supporting leg, and the top of the lifting rod is connected with the horizontal ladder, and the supporting horizontal ladder is located at the top of the chassis. A ratchet rack is arranged on the horizontal ladder, and a gear meshed with the ratchet rack and a motor for driving the gear to rotate are arranged on the bottom frame. The motor drives the gear to rotate, thereby driving the ratchet rack to move, so that the horizontal ladder can be lifted and lowered on the bottom frame. However, the overall cumbersome handling of the scaffolding means that the table top that can be lifted is limited to the current floor to which it belongs, and cannot be lifted across multiple floors, so its construction height range is limited. This is because the structural design of the scaffold can only be lifted and lowered on the same level, and cannot be lifted across different levels. For the needs of multi-layer combination superimposed construction, it is necessary to use other types of scaffolding or combine other devices to achieve.

In addition to limiting the construction height range, there is another problem with the existing liftable scaffolding, that is, in the construction of two floors and above, the table needs to be delivered from the ground upwards for installation, requiring at least two people to operate, which is labor-intensive. large and poses a safety hazard. At the same time, due to the high construction height of double-deck and above, there is a greater safety risk in the operation process. Therefore, it is necessary to further develop and improve the structural design of the scaffold to improve its stability, safety and operation convenience, and to meet the needs of different heights. construction needs.

Contents of the invention

Aiming at the above problems, the present invention provides a liftable scaffold, which is structurally easy to disassemble, and its working table can automatically achieve cross-layer arrival.

The object of the invention of the present invention is achieved through the following technical solutions: a liftable scaffold, including a horizontal workbench and support frames installed on both sides of the workbench, the support frame includes two longitudinal rods, characterized in that the support The frame is provided with a first sliding piece, which is slidably installed on the longitudinal bar. The upper end of the first sliding piece is provided with a raised support block, and the four corners of the horizontal workbench are buckled on the support block. The support block There is a raised block on the top, and a slot suitable for the block is provided at the bottom of the horizontal workbench, and the horizontal workbench is installed on the support block by buckling the block into the slot;

The horizontal workbench slides up and down on the longitudinal bar through the first sliding member to realize lifting.

As a preference, a second slider is also provided on the vertical rod, the second slider is located below the first slider, and a transmission support assembly is provided at the lower end of the horizontal workbench. The transmission support assembly includes two pairs of frames and transmission rods. The two ends of the rod are symmetrical with the drive rod as the center. A power device is provided on the horizontal workbench. One end of the drive rod is connected to the power device. The power device drives the drive rod to rotate. The second threaded part, the first threaded part and the second threaded part are respectively provided with a first moving block and a second moving block, and the first moving block and the second moving block are rotated on the first threaded part and the second threaded part by thread rotation. move up.

As preferably, the frame includes support rods on both sides and connecting rods for connection between the two support rods, and the two pairs of frames pass through the first moving block and the second moving block respectively through the connecting rods, so that the frame and the first moving block It is respectively connected with the second moving block, and the support rod is detachably hinged on the second sliding piece.

Preferably, slide grooves are provided on both sides of the horizontal workbench, the two ends of the connecting rod protrude and are located in the slide groove, and the two ends of the connecting rod are provided with limiting blocks, the outer diameter of which is larger than the sliding groove.

Preferably, the power device includes a motor, a transmission shaft, a fixing piece and a housing, the housing is located on the horizontal workbench, the motor is installed in the housing, the motor and the transmission shaft are connected and driven by a transmission belt, and the transmission shaft extends to the lower end of the horizontal workbench and Drive connection with the end of the transmission rod.

Preferably, the fixing part is installed at the lower end of the horizontal workbench, the transmission rod and the transmission shaft pass through the fixing part, and the first sliding part is provided with a fall prevention locking mechanism.

Preferably, each anti-drop locking mechanism includes a locking seat, a locking cover and a claw in the locking seat, the locking cover covers the locking seat, and each longitudinal bar is provided with a A ratchet rack with the same length as the longitudinal bar, the claws are adapted to the ratchet rack.

Preferably, the claw is hinged on the locking seat, a spring is provided between the locking cover and the claw, a pressing block and a toggle bar are arranged between the locking cover and the locking seat, and the lower end of the toggle bar is fixedly installed on the card. On the claw, the upper end is in contact with the pressing block. A knob is provided at the front end of the locking cover, and the knob is against the pressing block. A button is also provided at the upper end of the locking cover, and a protrusion adapted to the button is provided on the pressing block. The protrusion is inclined, and the lower end of the button is also inclined.

Preferably, an adjusting button is provided on the second sliding member, and the second sliding member can also slide on the longitudinal bar and be locked by the adjusting button.

The present invention also provides a construction method for the scaffold, the steps are:

S1. Build scaffolding

a. Preparation of supporting parts, according to the number of layers required for scaffolding, prepare corresponding supporting parts;

b. Build the first layer of scaffolding: install pulleys on the four vertical bars and place them on the four corners of the horizontal workbench, then install the first sliding piece and the second sliding piece on the vertical bars, and fix the second sliding piece with the adjustment knob. The second sliding part, then, install the transmission support assembly on the lower end of the horizontal workbench, connect the first sliding part, and finally install the power device so that it is connected with the transmission rod;

c. Build the scaffolding on the second floor and above: extend the four vertical rods to the predetermined height, and set up a horizontal workbench at the junction of each floor, install the first sliding piece and the second sliding piece, and fix the second sliding piece with the adjustment knob Parts, at the transfer position of each layer, cover the transfer position of the upper and lower layers at the same time, and the second sliding part is locked;

d. Install the anti-fall locking mechanism: install a ratchet bar on each longitudinal bar, and connect the anti-fall locking mechanism to the ratchet bar through the claw;

e. Install guardrails: install guardrails on both sides of each workbench;

f. Debugging and inspection: After the scaffolding is built, check all connecting parts, locking mechanisms and power devices to ensure that all parts are firmly connected and operating normally, and then conduct a trial run on the scaffolding to ensure that it is safe and stable ground lift;

S2. Up and down position adjustment of horizontal workbench

Ascent adjustment of the horizontal workbench: After the combination of each component is completed, perform the ascent operation:

a. Make sure the adjustment knob is loose;

b. Start the power device and turn it, so that the first moving block and the second moving block move to the center respectively, when the second sliding part moves close to the bottom of the first sliding part, stop the power device and lock the second sliding part;

c. Restart the power unit and turn it in the opposite direction, so that the first moving block and the second moving block move outward respectively, and push the horizontal worktable upwards as a whole through the support rod. When the appropriate height is reached, stop the power unit, and Locking of the second slide, thus completing the single lift operation;

The lowering adjustment of the horizontal workbench, after the combination of each component is completed, the lowering operation is performed:

a. The adjustment button is in the locked state, and the anti-drop locking mechanism is unlocked;

b. Start the power unit and turn it, so that the first moving block and the second moving block move to the center respectively, and the supporting angle of the support bar turns from tending to vertical to tending to horizontal, thereby driving the horizontal table to descend. When it falls to the preset position, stop the power unit, and adjust the anti-drop locking mechanism to an effective state at this time, so that the horizontal table can be parked stably;

c. Adjust the adjusting knob to the loosened state, then restart the power unit and turn it in the opposite direction, so that the first moving block and the second moving block move outward respectively, and the supporting angle of the support rod changes from tending to horizontal to vertical , the second sliding member slides down during this process, repeating the aforementioned actions can gradually complete the decline of the horizontal workbench.

In summary, compared with the prior art, the present invention has the following advantages:

1. The lifting and lowering of the workbench is realized through a single power source to ensure synchronization and consistency, and it is convenient for the operator to stand on the workbench to operate. Utilizing the characteristics of the anti-drop mechanism, it acts as a climbing fulcrum in the locked state, so that the workbench can rise and fall stably under the activation of the power device, which improves the operating efficiency.

2. The lifting structure of the workbench can achieve cross-layer arrival or discharge, which is very convenient for the erection of multi-layer scaffolding. Through the cooperation of the power device and the adjustment knob, knob or button, the workbench can be stepped up step by step, avoiding the trouble of delivery from the ground.

3. Each component is the same as the quick-release scaffolding on the market, easy to disassemble, convenient for transportation and storage.

4. In terms of safety, the first sliding part is equipped with an anti-fall mechanism, which is in a locked state under normal conditions to prevent the first sliding part from sliding down and ensure the safety of users standing on the workbench. The locking of the support components and the fastening of the four corners of the workbench to the first sliding member further improve the stability of the workbench and ensure the safety and good experience of users.

In a word, the present invention realizes the stability, safety and convenience of lifting and lowering the workbench through ingenious design, and improves the efficiency and safety factor of scaffolding operation.

Description of drawings

Fig. 1 is a perspective view 1 of the present invention.

Figure 2 is an exploded view of the present invention.

Fig. 3 is a second perspective view of the present invention.

Fig. 4 is an exploded view of the power plant of the present invention.

Fig. 5 is a schematic diagram of the anti-drop mechanism of the present invention.

FIG. 6 is a partial enlarged view of A in FIG. 2 .

Reference signs: 1, horizontal workbench, 2, support frame, 3, longitudinal bar, 4, cross bar, 5, first sliding part, 6, second sliding part, 7, supporting block, 8, clamping block, 9 , card slot, 10, transmission support assembly, 11, frame, 12, transmission rod, 13, power unit, 14, first threaded part, 15, second threaded part, 16, first moving block, 17, second moving Block, 18, support rod, 19, connecting rod, 20, motor, 21, transmission shaft, 22, fixed part, 23, anti-drop locking mechanism, 24, ratchet rack, 25, locking block, 26, locking Cover, 27, claw, 28, spring, 29, pressing block, 30, pressing bar, 31, knob, 32, button, 33, bump, 34, adjusting button, 35, guardrail, 37, chute, 38, Limiting block, 39, housing.

Detailed ways

The present invention will be further described below in conjunction with the embodiment represented by accompanying drawing:

Example 1

As shown in Figure 1-2, a liftable scaffold includes a horizontal workbench 1 and support frames 2 installed on both sides of the workbench. The support frame 2 includes two longitudinal bars 3 and a cross bar 4 installed between the two longitudinal bars 3 . The supporting frame 2 is provided with a first sliding member 5 , and the first sliding member 5 is slidably mounted on the vertical rod 3 . The upper end of the first sliding member 5 is provided with a protruding support block 7 , and the four corners of the horizontal workbench 1 are buckled on the support block 7 . The supporting block 7 is provided with a protruding clamping block 8 , and the bottom of the horizontal workbench 1 is provided with a clamping slot 9 adapted to the clamping block 8 . The horizontal workbench 1 is installed on the support block 7 by snapping the block 8 into the slot 9, which can effectively reduce the situation that the workbench falls off during use, and also facilitates the disassembly of the horizontal workbench 1. The top and the bottom of the longitudinal rod 3 can be closely fitted to each other, thereby cooperating to complete the upward continuous multi-layer erection of the scaffold.

The horizontal workbench 1 slides up and down on the longitudinal rod 3 through the first sliding member 5 to realize lifting. A second sliding piece 6 is also arranged on the longitudinal bar 3 , and the second sliding piece 6 is located below the first sliding piece 5 . The lower end of the horizontal workbench 1 is provided with a transmission support assembly 10. The transmission support assembly 10 includes two pairs of frames 11 and transmission rods 12. The frames 11 are located at both ends of the transmission rod 12 and are symmetrical about the transmission rod 12. A power device 13 is provided on the horizontal workbench 1 , and the first sliding member 5 is raised and lowered by the power device 13 and the transmission support assembly 10 . One end of the transmission rod 12 is connected to a power device 13, and the power device 13 drives the transmission rod 12 to rotate. The transmission rod 12 is provided with a first threaded portion 14 and a second threaded portion 15 with opposite thread directions, and the first threaded portion 14 and the second threaded portion 15 are respectively provided with a first moving block 16 and a second moving block 17 , the first moving block 16 and the second moving block 17 move on the first threaded part 14 and the second threaded part 15 through screw rotation.

The frame 11 includes support rods 18 on both sides and a connecting rod 19 for connecting between the two support rods 18 . Two pairs of frames 11 respectively pass through the first moving block 16 and the second moving block 17 through connecting rods 19, so that the frames 11 are connected with the first moving block 16 and the second moving block 17 respectively. The support rod 18 is detachably hinged on the second sliding member 6 . When the second sliding member 6 is fixed, the power device 13 drives the transmission rod 12 to rotate. Since the thread directions of the first threaded portion 14 and the second threaded portion 15 are opposite, the first moving block 16 and the second moving block 17 will be displaced in opposite directions. When the first moving block 16 is displaced to the left, the second moving block 17 is displaced to the right, the support rod 18 rotates upwards at the hinge point, the transmission rod 12 rises and drives the first sliding member 5 to rise, thereby raising the horizontal workbench 1 . When the first moving block 16 is displaced to the right, the second moving block 17 is displaced to the left, the support rod 18 rotates downward with the hinge point, the transmission rod 12 descends and drives the first sliding member 5 to descend, thereby lowering the horizontal workbench 1 .

Both sides of the horizontal workbench 1 are provided with chute 37 , and the two ends of the connecting rod 19 protrude and are located in the chute 37 . During the lifting process of the horizontal workbench 1, the connecting rod 19 moves in the chute 37. In addition, the two ends of the connecting rod 19 are provided with limiting blocks 38, and the outer diameter of the limiting blocks 38 is larger than the chute 37, so that the horizontal working table 1 can be further fixed and its stability can be improved.

The power device 13 includes a motor 20 , a transmission shaft 21 , a fixing member 22 and a housing 39 . The housing 39 is located on the horizontal workbench 1 , and the motor 20 is installed in the housing 39 . The motor 20 and the transmission shaft 21 are connected and driven through a transmission belt. The transmission shaft 21 extends to the lower end of the horizontal workbench 1 and is connected in transmission with the end of the transmission rod 12 . When the motor 20 rotates, the power is transmitted to the transmission rod 12 through the transmission shaft 21 to drive the transmission rod 12 to rotate, thereby realizing the lifting of the horizontal workbench 1 .

The fixing part 22 is installed on the lower end of the horizontal workbench 1 , and the transmission rod 12 and the transmission shaft 21 pass through the fixing part 22 . This can effectively protect the transmission mechanism, prevent foreign objects from falling into the transmission mechanism during operation, and ensure the safety and reliability of the equipment. The first slide 5 shown is provided with a fall prevention locking mechanism 23, and the first slide 5 is locked by the fall prevention lock mechanism 23 to prevent the horizontal workbench 1 from accidentally falling during use.

Each anti-drop locking mechanism 23 includes a locking seat 25 , a locking cover 26 and a claw 27 in the locking seat 25 , and the locking cover 26 covers the locking seat 25 . A ratchet bar 24 with the same length as the longitudinal bar 3 is provided on the outward side of each longitudinal bar 3 , and the pawl 27 is adapted to the ratchet bar 24 . The anti-drop locking mechanism 23 is engaged with the ratchet bar 24 through the claw 27, so that the first sliding member 5 can rise but cannot fall under normal conditions, which ensures the safety of the user during work.

The claw 27 is hinged on the locking seat 25 , and a spring 28 is arranged between the locking cover 26 and the claw 27 . A pressing block 29 and a toggle bar 30 are provided between the locking cover 26 and the locking seat 25 . The lower end of the toggle bar 30 is fixedly mounted on the claw 27 , and the upper end is in contact with the pressing block 29 . By triggering the pressing block 29 to move to the conflicting side, the lower end of the claw 27 is opened, thereby releasing the clamping state of the claw 27 and the ratchet bar 24 . At this time, through the cooperation of the transmission support assembly 10 and the power device 13, the horizontal workbench 1 can be raised or lowered. In a normal state, the anti-drop locking mechanism 23 is in a locked state, and the claw 27 is squeezed by the spring 28 to keep the claw 27 and the ratchet bar in a locked state.

A knob 31 is disposed at the front end of the locking cover 26 , and the knob 31 abuts against the pressing block 29 . The user can screw in the knob 31 , thereby pushing the pressing block 29 to move inward, and releasing the limit of the anti-drop locking mechanism 23 . A button 32 is also provided on the upper end of the locking cover 26 , and a protrusion 33 adapted to the button is provided on the pressing block 29 . The bump 33 is inclined, and the lower end of the button 32 is also inclined. By pressing down the button 32 , the inclined surface at the lower end of the button 32 pushes the inclined surface on the projection 33 , thereby pushing the pressing block 29 to move inward, and releasing the limit of the anti-drop locking mechanism 23 . These two ways of releasing the limit make the operation more convenient: the user can quickly operate by pressing the button 32 on the workbench, and can choose one of the ways to release the limit on the ground according to personal preference.

An adjusting button 34 is provided on the second sliding member 6 , and the second sliding member 6 can also slide on the longitudinal bar 3 and be locked by the adjusting button 34 . If the second sliding part 6 is slid to a higher position, the maximum lifting distance of the horizontal table 1 is higher; Low, to meet the needs of users for different heights.

In the workbench of the present invention, each adjusting button 34 can be replaced by an electric cylinder lock or a motor lock, so that the operator can stand alone on the workbench 1 to operate the lift, which can greatly improve the labor efficiency.

Guardrails 35 are provided on both sides of the workbench 1 to provide protection for the user and reduce the possibility of falling from the workbench 1 during work. The guardrail 35 is inserted on the first sliding member 5 for easy disassembly.

A pulley is provided at the bottom of the longitudinal bar 3, which is convenient for the user to move to different positions for work. This design makes the workbench not only have the function of safety protection, but also conveniently adjust the position to meet the needs of users in different scenarios.

For the construction method of scaffolding, refer to all the attached drawings:

1. Build scaffolding

1. The preparation of supporting parts, according to the number of layers required by the scaffolding, prepare the corresponding supporting parts above. Assuming that three layers are built, all the accessories are equipped with three sets, and the horizontal workbench 1 needs to be equipped with at least three sets or more. This is Because at the transfer position of each layer, a horizontal workbench 1 must be set up to bridge, that is, the first sliding part 5 covers the transfer position of the upper and lower layers at the same time, and the second sliding part 6 is locked, so as to achieve the role of stabilizing the whole .

2. Build the first layer of scaffolding: install pulleys 36 on the four vertical rods 3 and place them on the four corners of the workbench 1 . Then, install the first slider 5 and the second slider 6 on the longitudinal bar 3 , and fix the second slider 6 with the adjusting knob 34 . Next, install the transmission support assembly 10 on the lower end of the horizontal workbench 1 and connect the first sliding member 5 . Finally, the power unit 13 is installed so as to be connected with the transmission rod 12 .

3. Build the scaffolding on the second and third floors: extend the four vertical rods 3 to a predetermined height, and set a horizontal workbench 1 at the handover position of each floor. The first slide 5 and the second slide 6 are installed, and the second slide 6 is fixed with the adjusting knob 34 . At the transfer position of each layer, the transfer position of the upper and lower layers is covered at the same time, and the second sliding member 6 is locked to achieve the effect of stabilizing the whole.

4. Install the anti-fall locking mechanism 23: install a ratchet bar 24 on each longitudinal bar 3, and connect the anti-fall locking mechanism 23 to the ratchet bar 24 through the claw 27 to ensure that the first sliding member 5. It can rise but cannot fall, ensuring the safety of users.

5. Install guardrails 35: Install guardrails 35 on both sides of the workbench 1 on each floor to provide protection for users and reduce the situation of falling from the workbench 1 during work. Make sure that the guardrail 35 is firmly inserted on the first slider 5 .

6. Debugging and inspection: After the scaffolding is built, inspect all connecting parts, locking mechanisms and power units to ensure that all parts are firmly connected and functioning normally. Then, conduct a trial run on the scaffold to ensure that it can be raised and lowered safely and stably.

2. Adjust the upper and lower positions of the horizontal workbench

1. Ascent adjustment of the horizontal workbench: After the assembly of each component is completed, perform the ascent operation:

a. Make sure that the adjustment button 34 is in the loosened state. At this time, the anti-fall locking mechanism 23 does not need to be operated, that is, it is in an effective anti-fall state. This can be done by pressing the button 32 or rotating the knob 31, so that the claw 27 and the ratchet The rack 24 is separated;

b. Start the power unit 13 and turn it, so that the first moving block 16 and the second moving block 17 move to the center respectively. Thus, the support rod 18 will drag the second sliding member 6 to move upward. When the second slide 6 moves to the bottom close to the first slide 5, stop the power device 13 and lock the second slide 6;

c. Restart the power unit 13 and turn it in reverse, so that the first moving block 16 and the second moving block 17 move outward respectively. Through the support rod 18, the horizontal workbench 1 is pushed up as a whole. After reaching a suitable height, the power unit 13 is stopped, and the second sliding member 6 is locked. This completes the single up operation.

2. The lowering adjustment of the horizontal workbench, after the combination of each component is completed, perform the lowering operation:

a. The adjustment button 34 is in the locked state, and the anti-fall locking mechanism 23 is unlocked, that is, it is in an invalid anti-fall state;

b. Start the power unit 13 and turn it, so that the first moving block 16 and the second moving block 17 move to the center respectively. Since the anti-falling locking mechanism 23 is in an invalid state, the support angle of the support rod 18 is turned from tending to vertical to tending to horizontal, thereby driving the horizontal workbench to descend. When descending to the preset position, stop the power unit 13, and adjust the anti-drop locking mechanism 23 to an effective state at this time, so that the horizontal workbench 1 can be parked stably;

c. Adjust the adjustment knob 34 to the loosened state, then restart the power unit 13 and turn it in the opposite direction, so that the first moving block 16 and the second moving block 17 move outward respectively. The support angle of the support rod 18 turns from tending to horizontal to tending to vertical, and the second sliding member 6 slides down along with it in this process. Repeat the foregoing actions to gradually complete the decline of the horizontal workbench.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (10)

1. A liftable scaffold, comprising a horizontal workbench (1) and a support frame (2) installed on both sides of the workbench, the support frame (2) includes two longitudinal rods (3), characterized in that, The support frame (2) is provided with a first slider (5), the first slider (5) is slidably mounted on the longitudinal bar (3), and the upper end of the first slider (5) is provided with a raised support block (7), the four corners of the horizontal workbench (1) are buckled on the support block (7), the support block (7) is provided with a raised block (8), and the bottom of the horizontal workbench (1) is provided with a suitable The card slot (9) of the card block (8), the horizontal workbench (1) is installed on the support block (7) by the card block (8) being buckled into the card slot (9); The horizontal workbench (1) slides up and down on the longitudinal bar (3) through the first sliding member (5) to realize lifting. 2. The scaffold according to claim 1, characterized in that, the longitudinal rod (3) is also provided with a second sliding piece (6), and the second sliding piece (6) is located below the first sliding piece (5) , the lower end of the horizontal workbench (1) is provided with a transmission support assembly (10), the transmission support assembly (10) includes two pairs of frames (11) and transmission rods (12), and the frames (11) are respectively located at both ends of the transmission rod (12) And take the transmission rod (12) as the center symmetry, a power device (13) is provided on the horizontal workbench (1), one end of the transmission rod (12) is connected to the power device (13), and the power device (13) drives the transmission rod (12) rotation, the transmission rod (12) is provided with a first threaded part (14) and a second threaded part (15) with opposite thread directions, and the first threaded part (14) and the second threaded part (15) are respectively provided with There are a first moving block (16) and a second moving block (17), and the first moving block (16) and the second moving block (17) rotate on the first threaded part (14) and the second threaded part ( 15) Move up. 3. The scaffold according to claim 2, characterized in that, the frame (11) includes support rods (18) on both sides and connecting rods (19) for connection between the two support rods (18), Two pairs of frames (11) respectively pass through the first moving block (16) and the second moving block (17) through the connecting rod (19), so that the frame (11) is connected with the first moving block (16) and the second moving block ( 17) are respectively connected, and the support rod (18) is detachably hinged on the second slider (6). 4. The scaffold according to claim 1, characterized in that, there are chute (37) on both sides of the horizontal workbench (1), and the two ends of the connecting rod (19) protrude and are located in the chute (37) , the two ends of the connecting rod (19) are provided with a limit block (38), and the outer diameter of the limit block (38) is larger than the chute (37). 5. The scaffold according to claim 2, characterized in that, the power device (13) includes a motor (20), a transmission shaft (21), a fixing member (22) and a housing (39), and the housing (39 ) is located on the horizontal workbench (1), the motor (20) is installed in the housing (39), the motor (20) and the transmission shaft (21) are connected and driven through the transmission belt, and the transmission shaft (21) extends to the horizontal workbench ( 1) The lower end is in transmission connection with the end of the transmission rod (12). 6. The scaffold according to claim 5, characterized in that, the fixing piece (22) is installed at the lower end of the horizontal workbench (1), and the transmission rod (12) and the transmission shaft (21) pass through the fixing piece (22) ), the first sliding member (5) is provided with a fall prevention locking mechanism (23). 7. The scaffold according to claim 6, characterized in that, each of the anti-drop locking mechanisms (23) includes a locking seat (25), a locking cover (26) and an inner locking seat (25) The claw (27), the locking cover (26) covers the locking seat (25), and the outward side of each longitudinal rod (3) is provided with a ratchet bar with the same length as the longitudinal rod (3) (24), the pawl (27) is adapted to the ratchet bar (24). 8. The scaffold according to claim 7, characterized in that, the claw (27) is hinged on the locking seat (25), and a spring ( 28), a pressing block (29) and a toggle bar (30) are provided between the locking cover (26) and the locking seat (25), and the lower end of the toggle bar (30) is fixedly installed on the claw (27), The upper end is in contact with the pressing block (29), the front end of the locking cover (26) is provided with a knob (31), the knob (31) is against the pressing block (29), and the upper end of the locking cover (26) is also provided with a button (32) , the pressing block (29) is provided with a protrusion (33) adapted to the button, the protrusion (33) is inclined, and the lower end of the button (32) is also inclined. 9. The scaffold according to claim 1, characterized in that, the second sliding part (6) is provided with an adjustment button (34), and the second sliding part (6) can also slide on the longitudinal bar (3) , and lock it through the adjustment button (34). 10. For the construction method of scaffolding, refer to all the attached drawings: A construction method using the scaffold described in any one of claims 1-9, characterized in that the steps are: S1. Build scaffolding a. Preparation of supporting parts, according to the number of layers required for scaffolding, prepare corresponding supporting parts; b. Build the first layer of scaffolding: install the pulleys (36) on the four vertical rods (3) and place them on the four corners of the horizontal workbench (1), and then place the first slide (5) and the second slide Install the piece (6) on the longitudinal bar (3), fix the second sliding piece (6) with the adjustment knob (34), then install the transmission support assembly (10) on the lower end of the horizontal workbench (1), and connect the second A sliding part (5), and finally, the power unit (13) is installed so that it is connected with the transmission rod (12); c. Build the scaffolding of the second floor and above: extend the four vertical rods (3) to a predetermined height, and set a horizontal workbench (1) at the handover position of each floor, install the first slide (5) and the second slide (6), fix the second sliding piece (6) with the adjustment button (34), cover the handover position of the upper and lower layers at the same time at the handover position of each layer, and lock the second sliding piece (6); d. Install the anti-fall locking mechanism (23): Install the ratchet rack (24) on each longitudinal rod (3), and connect the anti-fall locking mechanism (23) to the ratchet through the claw (27) section (24); e. Install guardrails (35): install guardrails (35) on both sides of the workbench 1 on each floor; f. Debugging and inspection: After the scaffold is built, check all connecting parts, locking mechanisms and power devices to ensure that all parts are firmly connected and operating normally, and then conduct a trial run on the scaffold to ensure its safety and stability ground lift; S2. Up and down position adjustment of horizontal workbench Ascent adjustment of the horizontal workbench: After the combination of each component is completed, perform the ascent operation: a. Make sure the adjustment button (34) is in the loose state; b. Start the power device (13) and turn it, so that the first moving block (16) and the second moving block (17) move to the center respectively, when the second sliding piece (6) moves close to the first sliding piece (5) When at the bottom of the slide, stop the power unit (13) and lock the second slider (6); c. Restart the power unit (13) and turn it in the opposite direction, so that the first moving block (16) and the second moving block (17) move outward respectively, and the horizontal worktable (1) as a whole is moved through the support rod (18). Push up, and when it reaches a suitable height, stop the power unit (13) and lock the second slide (6), thus completing the single-up operation; The lowering adjustment of the horizontal workbench, after the combination of each component is completed, the lowering operation is performed: a. The adjusting button (34) is in the locked state, and the anti-drop locking mechanism (23) is unlocked; b. Start the power device (13) and turn it, so that the first moving block (16) and the second moving block (17) move to the center respectively, and the support angle of the support rod (18) changes from tending to vertical to tending to horizontal, Thereby, the horizontal workbench is driven down, and when it falls to the preset position, the power device (13) is stopped, and at this time, the anti-drop locking mechanism (23) is adjusted to an effective state, so that the horizontal workbench (1) stops stably; c. Adjust the adjustment knob (34) to the loose state, then restart the power unit (13) and turn it in the opposite direction, so that the first moving block (16) and the second moving block (17) move outward respectively, and the support rod The support angle of (18) turns from tending to horizontal to tending to vertical, and the second sliding member (6) slides down along with it in this process, and the descending of the horizontal workbench can be completed gradually by repeating the aforementioned actions.

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