Stretchable scaffold

Abstract

The utility model relates to the technical field of scaffolds, and particularly discloses a stretching scaffold which comprises a main body frame, a moving frame, a pulley device and a lifting hook device, the main body frame comprises a first frame body and a moving structure, the moving structure is installed at the lower end of the first frame body, and the moving structure is used for moving the scaffold or fixing the scaffold on the ground; the movable frame comprises a second frame body and a bearing platform, and the bearing platform is fixedly connected to the upper end of the second frame body; the moving frame is mounted on the inner side of the main body frame, one end of the pulley device is mounted on the main body frame, the other end of the pulley device is mounted on the moving frame, and the pulley device is used for controlling the moving frame to move up and down in the main body frame; the lifting hook device is fixed to the lower end of the first frame body and used for positioning and locking in the vertical moving process of the movable frame. According to the scaffold, an operator can adjust the scaffold to the required height at any time, a channel does not need to be formed in advance, safe and convenient use of the scaffold is achieved, and the working efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scaffolds, in particular to a stretchable scaffold. BACKGROUND

[0002] The scaffold refers to various supports erected at a construction site for operating personnel to operate and solve the problems of vertical and horizontal transportation.

[0003] In the related art, the fixed plate on the scaffold is inconvenient to disassemble, when the operating personnel are climbing, the operating personnel need to open a channel in a certain position of the scaffold in advance, which is very inconvenient; and the existing scaffold is prone to slipping when the operating personnel are climbing, which has safety hazards. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the problems of the existing scaffold that needs to open a channel in advance each time, low work efficiency and safety hazards, the present application provides a stretchable scaffold.

[0005] The stretchable scaffold provided by the present application adopts the following technical scheme:

[0006] A stretchable scaffold comprises a main body frame, a moving frame, a pulley device and a lifting hook device, the main body frame comprises a first frame body and a moving structure, the moving structure is installed at the lower end of the first frame body, and the moving structure is used for moving or fixing the scaffold on the ground; the moving frame comprises a second frame body and a bearing platform, the bearing platform is fixedly connected to the upper end of the second frame body; the moving frame is installed on the inner side of the main body frame, one end of the pulley device is installed on the main body frame, the other end of the pulley device is installed on the moving frame, and the pulley device is used for controlling the up-down movement of the moving frame in the main body frame; the lifting hook device is fixed to the lower end of the first frame body, and the lifting hook device is used for positioning and locking during the up-down movement of the moving frame.

[0007] Through the above technical scheme, when in use, the scaffold is first moved to a specific position by the moving structure and fixed on the ground, then the moving frame is moved to the required height by pulling the pulley device, and the moving frame is fixed at the required position by the lifting hook device; the operating personnel can adjust to the required height at any time, without the need to open a channel in advance, realizing the safe and convenient use of the scaffold, which helps to improve the work efficiency.

[0008] Optionally, the first frame body comprises a fixed plate, a bottom crossbar, a crossbar and two parallel ladders, the ladder comprises two vertically arranged support rods, and a plurality of ground parallel steps are arranged between the two support rods; the bottom crossbar is provided with at least two, and the bottom crossbar is fixedly connected to the bottom of the two ladders respectively; the crossbar is provided with at least two, and the crossbar is fixedly connected to the top of the two ladders respectively; the fixed plate is horizontally fixed between the two ladders; the first frame body and the second frame body are the same in structure.

[0009] By adopting the above technical scheme, the two parallel ladders, the bottom crossbar and the crossbar jointly form a stable frame structure, which reduces the safety hazards caused by structural looseness or deformation; the fixed plate provides a temporary working platform for the operating personnel, and through the movement of the moving frame, the fixed plate of the second frame body can be fixed at the required height, without the need to pre-open a channel, which is convenient to use.

[0010] Optionally, the first inclined pull rod is obliquely fixed between the two oppositely arranged support rods.

[0011] By adopting the above technical scheme, the first inclined pull rod can increase the structural stability of the first frame body and the second frame body, so that the use of the scaffold is more safe.

[0012] Optionally, the pulley device comprises an upper support, a lower support, a connecting rope, two fixed pulleys and two movable pulleys, the two fixed pulleys are installed in the upper support respectively, and the two movable pulleys are installed in the lower support respectively; the upper support is fixedly connected to the uppermost step of the first frame body, and the lower support is fixedly connected to the lowermost step of the second frame body; one end of the connecting rope is fixed to the uppermost step of the first frame body, and the other end of the connecting rope is sequentially threaded through the movable pulley, the fixed pulley, the movable pulley and the fixed pulley and is vertically downward as a free end.

[0013] By adopting the above technical scheme, when in use, by pulling the free end of the connecting rope, the distance between the uppermost step of the first frame body and the lowermost step of the second frame body can be changed, and the up-down movement of the moving frame in the main frame is realized; the cooperation of the movable pulley and the fixed pulley effectively reduces the force required for traction, and facilitates the operation of the operating personnel.

[0014] Optionally, the lifting hook device comprises a first limiting piece and a second limiting piece, the first limiting piece is installed above the lower end step of the second frame body, and the second limiting piece is installed below the same step;

[0015] The first limiting piece comprises a clamping plate, a limiting plate, a connecting plate and a first elastic piece. One end of the clamping plate is fixedly connected with one end of the limiting plate, and the clamping plate is located at the end of the limiting plate close to the fixed plate. The connecting end of the clamping plate and the limiting plate is rotatably installed on the inner side of the supporting rod of the second frame body, and the rotation shaft is perpendicular to the length direction of the supporting rod. The first elastic piece is installed on the rotation shaft of the first limiting piece, and the first elastic piece provides a force to the first limiting piece to rotate away from the end of the fixed plate. The connecting plate is fixed between the clamping plate and the limiting plate. The end of the clamping plate away from the first elastic piece is fixedly connected with a clamping block, and the end of the clamping block away from the first elastic piece is bent towards the end away from the fixed plate. The pedal below the first limiting piece is clamped in the bend of the clamping block.

[0016] The second limiting piece comprises an arc-shaped plate and a second elastic piece. The arc-shaped plate is rotatably installed on the inner side of the supporting rod of the second frame body, and the rotation shaft is perpendicular to the length direction of the supporting rod. The arc-shaped plate is a downwardly concave arc-shaped structure. The second elastic piece is installed on the rotation shaft of the second limiting piece, and the second elastic piece provides a force to the arc-shaped plate to rotate away from the end of the fixed plate. When the arc-shaped plate rotates, the end of the arc-shaped plate away from the second elastic piece abuts against the end of the clamping block away from the fixed plate.

[0017] By adopting the above technical solution, when the moving frame needs to rise, the free end of the connecting rope is pulled downward, the moving frame moves upward, the pedal of the second frame body on the upper layer abuts against the end of the limiting plate away from the clamping plate and pushes the first limiting piece to rotate towards the end close to the fixed plate, the limiting plate goes over the pedal upward, the limiting plate returns to the original position under the action of the first elastic piece, the lower end of the limiting plate abuts against the upper end of the pedal, and the movement and locking of the moving frame upward are realized. When the moving frame needs to descend, the free end of the connecting rope is pulled downward, the moving frame moves upward, the pedal of the second frame body abuts against the upper end of the arc-shaped plate and pushes the arc-shaped plate to rotate towards the end close to the fixed plate until the arc-shaped plate goes over the pedal, the arc-shaped plate returns to the original position under the action of the second elastic piece, then the free end of the connecting rope is loosened upward, the moving frame moves downward under the action of its own gravity, the lower end of the arc-shaped plate abuts against the pedal and pushes the arc-shaped plate to rotate upward until the end of the arc-shaped plate away from the second elastic piece abuts against the end of the clamping block away from the fixed plate, the arc-shaped plate pushes the first limiting piece to rotate towards the end close to the fixed plate, the limiting plate goes over the pedal downward, and the movement of the moving frame downward is realized. The upward and downward movement and position locking of the moving frame can be realized by pulling the free end of the connecting rope, which is convenient for the operator to use.

[0018] Optionally, the lifting hook device is provided with four groups, and the four groups of lifting hook devices are respectively arranged around the fixed plate.

[0019] By adopting the above technical solution, the four groups of lifting hook devices can provide more stable locking and increase the safety of the scaffold.

[0020] Optionally, the moving structure comprises a connecting rod, a universal wheel and an adjustable height support leg, the connecting rod is fixed at the lower end of the first frame body, the connecting rod is perpendicular to the length direction of the first frame body, the universal wheel is fixedly connected below the connecting rod, and the support leg is fixedly connected at both ends of the connecting rod.

[0021] By adopting the above technical scheme, when the scaffold needs to be moved, the height of the support leg is adjusted to make the universal wheel contact the ground, the operating personnel can move the scaffold to the required position through the universal wheel, then the height of the support leg is adjusted to make the universal wheel separate from the ground, and the scaffold is fixed on the ground, so that the operating personnel can safely use the scaffold.

[0022] Optionally, the support leg comprises a cross arm, a threaded rod, a nut, an adjusting handle and a fixed seat, the cross arm is fixedly connected at both ends of the connecting rod, the threaded rod is threadedly connected at one end of the cross arm away from the connecting rod, the threaded rod is vertically arranged and can move up and down in the cross arm, the nut is threadedly connected on the threaded rod and is used for locking the position of the threaded rod, the adjusting handle is fixedly connected above the threaded rod and is used for adjusting the position of the threaded rod to control the contact and separation of the universal wheel with the ground, and the fixed seat is fixedly connected below the threaded rod.

[0023] By adopting the above technical scheme, the threaded rod moves up and down in the cross arm by controlling the adjusting handle, so that the distance between the cross arm and the fixed seat is adjusted and locked by the nut, when the distance between the threaded rod and the fixed seat decreases, the universal wheel contacts the ground, and the operating personnel can push the scaffold to move on the ground, and when the distance between the threaded rod and the fixed seat increases, the fixed seat is supported on the ground, the universal wheel separates from the ground, and the scaffold is stably fixed on the ground.

[0024] Optionally, the two sides of the ladder are respectively provided with a second diagonal pull rod, one end of the second diagonal pull rod is fixedly connected with one end of the cross arm close to the threaded rod, and the other end of the second diagonal pull rod is fixedly connected with the support rod.

[0025] By adopting the above technical scheme, the second diagonal pull rod is connected with the support leg at both ends of the connecting rod, so that the conversion of the contact and separation of the universal wheel with the ground is more smooth.

[0026] Optionally, the bearing platform comprises a bearing table and a baffle, the bearing table is horizontally arranged, the baffle is fixedly connected to the side of the bearing table, and the baffle is located on the upper side of the bearing table.

[0027] By adopting the technical scheme, the baffle is used for limiting the articles placed on the bearing table and protecting the workers on the bearing table, so as to prevent the workers from stepping empty.

[0028] In summary, the present application has at least one of the following beneficial technical effects:

[0029] 1. In use, first move the scaffold to a specific position by the moving structure and fix it on the ground, then pull the pulley device to move the moving frame to the required height, and fix the moving frame at the required position by the lifting hook device; the worker can adjust the scaffold to the required height at any time, without needing to open a channel in advance, so as to realize safe and convenient use of the scaffold and help improve work efficiency.

[0030] 2. In the lifting hook device, the first limiting piece and the second limiting piece are matched, the free end of the connecting rope is pulled, and the up-down movement and position locking of the moving frame are realized, so as to facilitate the worker to use.

[0031] 3. By setting the moving structure, rotating the adjusting handle to drive the threaded rod to move, and locking by using the nut, the conversion of the scaffold movement and fixing on the ground is realized, so as to facilitate use. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0033] Figure 2 is a schematic diagram of the overall structure of the main frame of the present application;

[0034] Figure 3 is an enlarged view of the A area in Figure 2

[0035] Figure 4 is a schematic diagram of the overall structure of the moving frame of the present application;

[0036] Figure 5 is a schematic diagram of the structure of the pulley device of the present application;

[0037] Figure 6 is a schematic diagram of the structure of the lifting hook device of the present application.

[0038] ​Fig. 1 is a perspective view of the main frame; Fig. 2 is a perspective view of the moving frame; Fig. 3 is a perspective view of the pulley device; Fig. 4 is a perspective view of the lifting hook device; Fig. 5 is a perspective view of the first frame body; Fig. 6 is a perspective view of the moving structure; Fig. 7 is a perspective view of the second frame body; Fig. 8 is a perspective view of the bearing platform; Fig. 9 is a perspective view of the first limiting piece; Fig. 10 is a perspective view of the second limiting piece. DETAILED DESCRIPTION

[0039] The following will be described in detail in combination with the accompanying drawings. Figures 1-6 The application is further described in detail.

[0040] The application discloses a stretching scaffold, which refers to Figure 1 , comprising a main frame 1, a moving frame 2, a pulley device 3 and a lifting hook device 4, the main frame 1 comprises a first frame body 11 and a moving structure 12, the moving structure 12 is installed at the lower end of the first frame body 11, and the moving structure 12 is used for moving or fixing the scaffold on the ground; the moving frame 2 comprises a second frame body 21 and a bearing platform 22, the bearing platform 22 is fixedly installed at the upper end of the second frame body 21, and the bearing platform 22 is used for bearing the working personnel to work safely at a high place; the moving frame 2 is installed on the inner side of the main frame 1, one end of the pulley device 3 is installed on the main frame 1, and the other end is installed on the moving frame 2, the pulley device 3 is used for controlling the up-down movement of the moving frame 2 in the main frame 1; the lifting hook device 4 is fixed at the lower end of the second frame body 21, and the lifting hook device 4 cooperates with the first frame body 11 to realize the positioning and locking in the up-down movement of the moving frame 2.

[0041] In use, the scaffold is first moved to the required position by the moving structure 12 and fixed on the ground, then the moving frame 2 is moved to the required height by pulling the pulley device 3, and the moving frame 2 is fixed at the required position by the lifting hook device 4; the working personnel can adjust the scaffold to the required height at any time, without needing to open a channel in advance, so that the scaffold is safely and conveniently used, and the working efficiency is improved.

[0042] The first frame body 11 and the second frame body 21 are the same in structure, and the structure of the first frame body 11 will be explained and described below.

[0043] Referring to Figure 2 , the first frame body 11 includes a fixed plate 112, two ladders 111, two bottom cross bars 113 and two cross pull rods 114, the two ladders 111 are parallel to each other, the ladder 111 includes two vertical support rods 1111, a plurality of parallel-to-ground steps 1112 are evenly arranged between the two support rods 1111; the steps 1112 are provided with anti-skid patterns, which helps to increase the safety of the operating personnel when climbing the scaffold. The two bottom cross bars 113 and the two cross pull rods 114 are respectively fixed vertically between the two ladders 111, the two ends of the bottom cross bar 113 are respectively connected to the bottom of the support rod 1111 by bolts, and the two ends of the cross pull rod 114 are respectively connected to the top end of the support rod 1111 by bolts. The fixed plate 112 is horizontally fixed between the two ladders 111, and the two ends of the fixed plate 112 are respectively fixed with hooks 115, which are respectively clamped on the steps 1112 at both ends to stably fix the fixed plate 112 at the bottom end of the two ladders 111. The first diagonal pull rod 116 is obliquely fixed between the two opposite support rods 1111, and the first diagonal pull rod 116 is used to increase the structural stability of the first frame body 11.

[0044] The moving structure 12 includes a connecting rod 121, a universal wheel 122 and an adjustable height support leg 123, the connecting rod 121 is fixed at the lower end of the support rod 1111 of the first frame body 11, and the connecting rod 121 is arranged parallel to the step 1112; the universal wheel 122 is fixedly installed below the connecting rod 121; the adjustable height support leg 123 is respectively fixed at both ends of the connecting rod 121.

[0045] Referring to Figure 2 and Figure 3 , the support leg 123 includes a cross arm 1231, a threaded rod 1232, a nut 1233, an adjusting handle 1234 and a fixed seat 1235, the cross arm 1231 is horizontally fixed at both ends of the connecting rod 121, a threaded hole 1236 is formed at the end of the cross arm 1231 away from the connecting rod 121, the axis of the threaded hole 1236 is perpendicular to the length direction of the cross arm 1231, and the threaded rod 1232 is arranged in the threaded hole 1236; the nut 1233 is threadedly connected to the threaded rod 1232, and the nut 1233 is located above the cross arm 1231, and is used for locking the position of the threaded rod 1232; the adjusting handle 1234 is integrally formed above the threaded rod 1232, and the adjusting handle 1234 is rotated around the axis of the threaded rod 1232, so as to drive the threaded rod 1232 to move in the threaded hole 1236; the fixed seat 1235 is fixedly installed below the threaded rod 1232.

[0046] When in use, the adjusting handle 1234 is rotated to move the threaded rod 1232 in the threaded hole 1236 of the cross arm 1231, so as to adjust the distance between the cross arm 1231 and the fixed seat 1235, and lock by the nut 1233; when the distance between the threaded rod 1232 and the fixed seat 1235 is reduced, the universal wheel 122 is in contact with the ground, and the operator can push the scaffold to move on the ground; when the distance between the threaded rod 1232 and the fixed seat 1235 is increased, the fixed seat 1235 is supported on the ground, and the universal wheel 122 is separated from the ground, so that the scaffold is stably fixed on the ground.

[0047] Further, the second inclined pull rods 124 are arranged on both sides of the ladder 111, one end of the second inclined pull rod 124 is threadedly connected with the end of the cross arm 1231 close to the threaded rod 1232, and the other end is threadedly connected with the support rod 1111, so that the conversion of the moving structure 12 between the moving and the fixing is more smooth.

[0048] With reference to Figure 4 , the bearing platform 22 comprises a bearing table 221, a baffle 222 and a surrounding rod 223, the bearing table 221 is horizontally arranged, the baffle 222 is connected to the side of the bearing table 221 by bolts, and the baffle 222 is located on the upper side of the bearing table 221, so as to limit the articles placed on the bearing table 221 and protect the operator on the bearing table 221 to prevent the operator from stepping off; the surrounding rod 223 is fixed between the two ladders 111, so as to increase the safety guarantee of the operator on the bearing platform 22.

[0049] With reference to Figure 1 and Figure 5 , the pulley device 3 comprises an upper support 31, a lower support 32, a connecting rope 33, two fixed pulleys 34 and two movable pulleys 35, the two fixed pulleys 34 are respectively installed in the upper support 31, and the two movable pulleys 35 are respectively installed in the lower support 32; the upper support 31 is fixedly installed on the tread plate 1112 at the uppermost end of the first frame body 11 by bolts, and the lower support 32 is fixedly installed on the tread plate 1112 at the lowermost end of the second frame body 21 by bolts; one end of the connecting rope 33 is tied on the tread plate 1112 at the uppermost end of the first frame body 11, and the other end passes through the movable pulley 35, the fixed pulley 34, the movable pulley 35 and the fixed pulley 34 in sequence, and then is vertically downward as a free end. The pulley device 3 is provided with two groups, and the two groups of pulley devices 3 are respectively and symmetrically fixed to the two ends of the first frame body 11 and the second frame body 21. When in use, the distance between the tread plate 1112 at the uppermost end of the first frame body 11 and the tread plate 1112 at the lowermost end of the second frame body 21 can be changed by pulling the free end of the connecting rope 33, so as to realize the up and down movement of the moving frame 2 in the main frame 1. In the embodiment, the connecting rope 33 is a steel wire rope.

[0050] With reference to Figure 5 and Figure 6The lifting hook device 4 comprises a first limiting piece 41 and a second limiting piece 42, both of which are fixed inside the support rod 1111 of the second frame body 21, and the first limiting piece 41 is installed above the second step 1112 of the second frame body 21 from bottom to top, and the second limiting piece 42 is installed below the same step 1112. In the embodiment, the lifting hook device 4 is provided with four groups, and the four groups of lifting hook devices 4 are respectively arranged around the fixed plate 112.

[0051] The first limiting piece 41 comprises a clamping plate 411, a limiting plate 412, a connecting plate 413 and a first elastic piece 414, one end of the clamping plate 411 and one end of the limiting plate 412 are integrally formed, and the clamping plate 411 is located at the end of the limiting plate 412 close to the fixed plate 112; the connecting end of the clamping plate 411 and the limiting plate 412 is rotatably installed inside the support rod 1111 and the rotation shaft is perpendicular to the length direction of the support rod 1111; the first elastic piece 414 is a torsion spring, which is installed on the rotation shaft of the first limiting piece 41 and provides a force to the first limiting piece 41 to rotate away from the end of the fixed plate 112; the connecting plate 413 is integrally formed at the end of the clamping plate 411 and the limiting plate 412 away from the rotation shaft, and the clamping plate 411, the limiting plate 412 and the connecting plate 413 form an A-shaped structure. The end of the clamping plate 411 away from the first elastic piece 414 is integrally connected with a clamping block 415, and the end of the clamping block 415 away from the first elastic piece 414 is bent towards the end away from the fixed plate 112. The step 1112 below the first limiting piece 41 is clamped in the bend of the clamping block 415. When the moving frame 2 moves to the desired position, the lower end of the limiting plate 412 abuts against the upper end of the step 1112 in the first frame body 11, thereby locking the position of the moving frame 2.

[0052] The second limiting piece 42 comprises an arc-shaped plate 421 and a second elastic piece 422, the arc-shaped plate 421 is rotatably installed inside the support rod 1111 and the rotation shaft is perpendicular to the length direction of the support rod 1111, and the arc-shaped plate 421 is a downwardly concave arc-shaped structure; the second elastic piece 422 is a torsion spring, which is installed on the rotation shaft and provides a force to the arc-shaped plate 421 to rotate away from the end of the fixed plate 112. Moreover, when the arc-shaped plate 421 rotates, the end of the arc-shaped plate 421 away from the second elastic piece 422 abuts against the end of the clamping block 415 away from the fixed plate 112.

[0053] When the mobile frame 2 needs to rise, the free end of the connecting rope 33 is pulled downward, the mobile frame 2 moves upward, the step 1112 of the second frame body 21 abuts against one end of the limiting plate 412 away from the clamping plate 411 and pushes the first limiting piece 41 to rotate toward the end close to the fixed plate 112, the limiting plate 412 goes over the step 1112 upward, the limiting plate 412 is restored to the original position under the action of the first elastic piece 414, the lower end of the limiting plate 412 abuts against the upper end of the step 1112, and the upward movement and locking of the mobile frame 2 are realized; when the mobile frame 2 needs to descend, the free end of the connecting rope 33 is pulled downward, the mobile frame 2 moves upward, the step 1112 of the second frame body 21 abuts against the upper end of the arc-shaped plate 421 and pushes the arc-shaped plate 421 to rotate toward the end close to the fixed plate 112 until the arc-shaped plate 421 goes over the step 1112, the arc-shaped plate 421 is restored to the original position under the action of the second elastic piece 422, then the free end of the connecting rope 33 is loosened upward, the mobile frame 2 moves downward under the action of the gravity, the lower end of the arc-shaped plate 421 abuts against the step 1112 and pushes the arc-shaped plate 421 to rotate upward to the end of the arc-shaped plate 421 away from the second elastic piece 422 abutting against the end of the clamping block 415 away from the fixed plate 112, the arc-shaped plate 421 pushes the first limiting piece 41 to rotate toward the end close to the fixed plate 112, the limiting plate 412 goes over the step 1112 downward, and the downward movement of the mobile frame 2 is realized.

[0054] The implementation principle of the stretching scaffold disclosed in the embodiments of the application is as follows: first, the scaffold is moved to a specific position by the moving structure 12 and is fixed on the ground, then the mobile frame 2 is moved to the required height by pulling the pulley device 3, and the mobile frame 2 is fixed at the required position by the lifting hook device 4; the upward and downward movement and position locking of the mobile frame 2 can be realized by pulling the free end of the connecting rope 33, the working personnel can adjust to the required height at any time, a channel does not need to be opened in advance, the scaffold is safe and convenient to use, and the working efficiency is improved.

[0055] The above are the preferred embodiments of the application, which do not limit the protection scope of the application, so: equivalent changes made on the basis of the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A type of tension scaffolding, characterized in that, The scaffolding includes a main frame (1), a mobile frame (2), a pulley device (3), and a lifting hook device (4). The main frame (1) includes a first frame (11) and a mobile structure (12). The mobile structure (12) is installed at the lower end of the first frame (11) and is used for moving or fixing the scaffolding to the ground. The mobile frame (2) includes a second frame (21) and a support platform (22). The support platform (22) is fixedly connected to the upper end of the second frame (21). The mobile frame (2) is installed inside the main frame (1). One end of the pulley device (3) is installed on the main frame (1), and the other end of the pulley device (3) is installed on the mobile frame (2). The pulley device (3) is used to control the up and down movement of the mobile frame (2) in the main frame (1). The lifting hook device (4) is fixed at the lower end of the first frame (11) and is used for positioning and locking the mobile frame (2) during its up and down movement.

2. A tension scaffold according to claim 1, characterized in that, The first frame (11) includes a fixing plate (112), a bottom crossbar (113), a horizontal tie rod (114), and two parallel ladders (111). Each ladder (111) includes two vertically arranged support rods (1111), and a plurality of treads (1112) parallel to the ground are arranged between the two support rods (1111). There are at least two bottom crossbars (113), which are fixedly connected to the bottom of the two ladders (111). There are at least two horizontal tie rods (114), which are fixedly connected to the top of the two ladders (111). The fixing plate (112) is horizontally fixed between the two ladders (111). The first frame (11) has the same structure as the second frame (21).

3. A tension scaffold according to claim 2, characterized in that, A first tie rod (116) is obliquely fixed between the two opposing support rods (1111).

4. A tension scaffold according to claim 2, characterized in that, The pulley device (3) includes an upper bracket (31), a lower bracket (32), a connecting rope (33), two fixed pulleys (34) and two movable pulleys (35). The two fixed pulleys (34) are respectively installed in the upper bracket (31), and the two movable pulleys (35) are respectively installed in the lower bracket (32). The upper bracket (31) is fixedly connected to the pedal (1112) at the uppermost end of the first frame (11), and the lower bracket (32) is fixedly connected to the pedal (1112) at the lowermost end of the second frame (21). One end of the connecting rope (33) is fixed to the pedal (1112) at the uppermost end of the first frame (11), and the other end of the connecting rope (33) passes through the movable pulley (35), the fixed pulley (34), the movable pulley (35) and the fixed pulley (34) in sequence and hangs down as a free end.

5. A tension scaffold according to claim 2, characterized in that, The lifting hook device (4) includes a first limiting member (41) and a second limiting member (42). The first limiting member (41) is installed above the lower end pedal (1112) of the second frame (21), and the second limiting member (42) is installed below the same pedal (1112). The first limiting member (41) includes a snap-fit ​​plate (411), a limiting plate (412), a connecting plate (413), and a first elastic member (414). One end of the snap-fit ​​plate (411) is fixedly connected to one end of the limiting plate (412), and the snap-fit ​​plate (411) is located at the end of the limiting plate (412) near the fixing plate (112). The connecting end of the snap-fit ​​plate (411) and the limiting plate (412) is rotatably mounted inside the support rod (1111) of the second frame (21), and the axis of rotation is perpendicular to the length direction of the support rod (1111). The first elastic member (414) is installed on the first limiting member (411). On the pivot of 41), the first elastic element (414) provides a force to the first limiting element (41) to rotate toward the end away from the fixed plate (112); the connecting plate (413) is fixed between the snap-fit ​​plate (411) and the limiting plate (412); the snap-fit ​​plate (411) is fixedly connected to the end away from the first elastic element (414) with a snap-fit ​​block (415), the snap-fit ​​block (415) is bent toward the end away from the fixed plate (112) with the end away from the first elastic element (414), and the pedal (1112) below the first limiting element (41) is snapped into the bend of the snap-fit ​​block (415); The second limiting member (42) includes an arc-shaped plate (421) and a second elastic member (422). The arc-shaped plate (421) is rotatably mounted on the inner side of the support rod (1111) of the second frame (21) and the axis of rotation is perpendicular to the length direction of the support rod (1111). The arc-shaped plate (421) is a downwardly concave arc-shaped structure. The second elastic member (422) is mounted on the axis of rotation of the second limiting member (42). The second elastic member (422) provides a force to the arc-shaped plate (421) to rotate toward the end away from the fixed plate (112). When the arc-shaped plate (421) rotates, the end of the arc-shaped plate (421) away from the second elastic member (422) abuts against the end of the snap-fit ​​block (415) away from the fixed plate (112).

6. A tension scaffold according to claim 5, characterized in that, The lifting hook device (4) is provided in four sets, and the four sets of lifting hook devices (4) are respectively arranged around the fixed plate (112).

7. A tension scaffold according to claim 2, characterized in that, The movable structure (12) includes a connecting rod (121), a caster wheel (122), and height-adjustable support feet (123). The connecting rod (121) is fixed to the lower end of the first frame (11) and is perpendicular to the length direction of the first frame (11). The caster wheel (122) is fixedly connected to the lower part of the connecting rod (121). The support feet (123) are fixedly connected to both ends of the connecting rod (121) and are used to control the contact and separation of the caster wheel (122) from the ground.

8. A tension scaffold according to claim 7, characterized in that, The support foot (123) includes a horizontal arm (1231), a threaded rod (1232), a nut (1233), an adjusting handle (1234), and a fixed base (1235). The horizontal arm (1231) is fixedly connected to both ends of the connecting rod (121). The threaded rod (1232) is threadedly connected to the end of the horizontal arm (1231) away from the connecting rod (121). The threaded rod (1232) is vertically arranged and can be positioned within the horizontal arm (1231). The nut (1233) is threaded onto the threaded rod (1232), and the nut (1233) is used to lock the position of the threaded rod (1232); the adjusting handle (1234) is fixedly connected above the threaded rod (1232), and the adjusting handle (1234) is used to adjust the position of the threaded rod (1232) to control the contact and separation of the caster wheel (122) from the ground; the fixed seat (1235) is fixedly connected below the threaded rod (1232).

9. A tension scaffold according to claim 8, characterized in that, The ladder (111) is provided with a second diagonal brace (124) on both sides. One end of the second diagonal brace (124) is fixedly connected to the end of the cross arm (1231) near the threaded rod (1232), and the other end of the second diagonal brace (124) is fixedly connected to the support rod (1111).

10. A tension scaffold according to claim 1, characterized in that, The support platform (22) includes a support platform (221) and a baffle (222). The support platform (221) is horizontally arranged, and the baffle (222) is fixedly connected to the periphery of the support platform (221). The baffle (222) is located on the upper side of the support platform (221).

Images