Crossing frame based on pulley lifting and use method

Abstract

The invention discloses a crossing frame based on pulley lifting and a using method, the crossing frame comprises a vertical sleeve frame, the vertical sleeve frame comprises a plurality of frame bodies, the sectional dimensions of the frame bodies are sequentially reduced, and the frame bodies are sequentially wound through a cable and a pulley to form a layer-by-layer sleeve connection structure with the free end of the cable output from the bottom layer frame body; the locking structure is at least arranged on the frame body from the secondary top layer to the secondary bottom layer, so that the mooring rope wound on the frame body is switched between two states that the mooring rope and the frame body are kept fixed and the mooring rope can move relative to the frame body; the multiple limiting structures are arranged between every two adjacent shelf bodies, so that when the relative height between every two adjacent shelf bodies is at a preset value, the limiting structures are in a limiting state for limiting the horizontal directions of the adjacent shelf bodies and bearing at the same time; the transverse support frame is connected with the top of the vertical sleeve frame; the driving part is connected with the free end of the cable. The spanning frame is convenient to transport, the spanning frame can be quickly built, and meanwhile the stable effect of the spanning frame is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power engineering construction, and in particular to a pulley-lifting-based spanning frame and a use method thereof. Background Art

[0002] During the installation of high-voltage power lines, in order to prevent the cables from accidentally falling and damaging the personnel and buildings below, thereby posing a safety hazard, it is necessary to use a spanning frame to protect the objects below the power lines, such as roads and buildings. Traditional spanning frames are usually constructed of steel pipes and steel frames, and use a sealing net to protect the objects below. Traditional spanning frames have the following problems: (1) They are often temporarily constructed using bamboo scaffolding, steel pipes, and steel frames, requiring multiple workers and various installation equipment, resulting in a long installation time and high installation costs; (2) Traditional spanning frames have a scattered structure and are more difficult to transport.

[0003] In view of this, it is necessary to design a crossing frame based on pulley lifting and a method of use to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a pulley-based lifting spanning frame and a method for using the pulley-based lifting spanning frame, which is easy to transport and can quickly complete the construction of the spanning frame while ensuring its stability.

[0005] To achieve the above-mentioned purpose, the present invention provides a pulley-based lifting span frame, comprising: The vertical sleeve frame includes a plurality of frames with successively smaller cross-sectional dimensions, each frame being wound in sequence by a cable and a pulley to form a layer-by-layer sleeve structure in which the free end of the cable is output from the bottom frame; A locking structure is provided on at least the frame from the second top layer to the second bottom layer, so as to switch the cable wound around the frame between two states: being fixed to the frame and being movable relative to the frame; A limiting structure, wherein multiple limiting structures are arranged between two adjacent frames, including a clamping area located on the inner frame and a connecting rod mechanism and an elastic movable member located on the outer frame, so that in an initial state, the lower rod body of the connecting rod mechanism abuts against the side wall of the inner frame so that the elastic movable member is in a contracted state; when the inner frame moves to a specific height relative to the outer frame, the elastic movable member extends under the restoring force and drives the connecting rod mechanism to move, so that the lower rod body of the connecting rod mechanism and the elastic movable member are clamped in the clamping area and the upper part of the connecting rod mechanism rotates until both ends abut between the side walls of the inner and outer frames, so that the limiting structure is in a limiting state that limits the horizontal orientation of the adjacent frames and bears the load at the same time; and A horizontal support frame connected to the top of the vertical sleeve frame; A driving member is connected to the free end of the cable.

[0006] As a further improvement of the present invention, the locking structure includes a fixed pulley fixed on the frame, a movable pulley arranged above the fixed pulley, a control component for controlling the state of the movable pulley, and a clamping component with a clamping point between the movable pulley and the fixed pulley, so that under the regulation of the control component, the movable pulley is converted between a fixed state and a movable state, wherein, when the movable pulley is in a fixed state, the clamping component is in a loose state; when the movable pulley is in a movable state, under the action of the cable tension, the movable pulley moves and drives the clamping component to be converted into a clamping state for clamping the cable.

[0007] As a further improvement of the present invention, the control assembly includes a control rod connected to the frame body at both ends through a sliding mechanism and a locking mechanism respectively, and the control rod is also connected to the axis of the movable pulley through the sliding assembly, so that in the initial state, the control rod is in a fixed state that makes the movable pulley fixed. Under the action of external force, the control rod moves relative to the movable pulley and the frame to a rotating state in which it can rotate around its sliding connection end with the frame, so that the movable pulley is movable.

[0008] As a further improvement of the present invention, the clamping assembly includes a first block fixed on the frame and a second block that can move with the movable pulley to switch between a clamping state and a loose state with the first block.

[0009] As a further improvement of the present invention, the connecting rod mechanism includes a first rod body at one end rotatably connected to the frame body and a second rod body connected to the first rod body through a connecting piece. The second rod body is located above the first rod body and one end of the second rod body is rotatably connected to the frame body, so that the second rod body rotates around the connection end between the second rod body and the frame body as the first rod body rotates. The first rod body is also connected to the frame body through a spring, which is in a stretched state when the limiting structure is in a limited state and is in a freely retractable state in the initial state of the limiting structure.

[0010] As a further improvement of the present invention, the elastic moving member includes an elastic member with one end fixed to the frame and a connecting block connected to the free extension part of the elastic member and whose shape is adapted to the shape of the first rod to facilitate limiting.

[0011] As a further improvement of the present invention, the elastic modulus of the elastic member is greater than the elastic modulus of the spring.

[0012] As a further improvement of the present invention, the cables are arranged in such a way that the vertical sleeves are raised step by step from the inside to the outside under the action of tension.

[0013] The present invention also provides a method for using the pulley-lifting spanning frame according to the above solution, comprising the following steps: S1. Place two vertical frames on the ground at intervals; S2, starting the driving member to wind the cable, and the innermost frame moves upward. When the innermost frame moves to a predetermined height, the elastic moving member between the innermost frame and the second innermost frame pops out to put the limiting structure in a limited position; S3, adjusting the locking structure on the secondary inner frame so that the cable wound around the secondary inner frame and the secondary inner frame remain in a relatively fixed locked state, causing the driving member to continue winding the cable, and the secondary inner frame to move upward. According to the operations of steps S2 and S3, the secondary inner frame and the remaining frames to be raised are raised, that is, the raising of the spanning frame is completed; S4. After the construction is completed, the locking mechanism on the sub-bottom frame is adjusted to an unlocked state, the driving member is activated to provide a pulling force, the limiting structure between the bottom frame and the adjacent sub-bottom frame is adjusted to an unrestricted state, and the cable is released by the driving member to cause the sub-bottom frame to fall; S5. Complete the lowering of the remaining frames in sequence according to the method of step S4, that is, complete the disassembly of the spanning frame.

[0014] As a further improvement of the present invention, in step S4, the operation of adjusting the limiting structure between the bottom frame and the adjacent sub-bottom frame to a non-limiting state is specifically: the elastic moving part is forced to move out of the engaging area, and at the same time the lower rod of the connecting rod mechanism is retracted between the side walls of the adjacent frames.

[0015] The beneficial effects of the present invention are: 1. The present invention connects vertical sleeves by cables to form a layer-by-layer sleeve structure, and uses a locking structure to control the fixed state of the cables wound around the frame and the corresponding frame. It further cooperates with the limiting structure and drives the cables through the driving member to quickly complete the lifting control of each level of the frame in sequence. The structure is simple and easy to operate. In addition, this lifting control method can also enable the spanning frame to be set to the corresponding level according to the actual required height to meet more spanning requirements.

[0016] 2. The present invention sets a plurality of limit structures between adjacent frames, and sets the limit structures to automatically pop out the limit, so that when the upper frame is raised to a predetermined position, the limit structure can fix the upper frame and limit its movement, so that the limit structure can serve as a stabilizing member to improve the horizontal stability between adjacent frames to ensure the horizontal stability of the cross-frame support and avoid the cross-frame from shaking, and as a load-bearing member to bear the gravity of the structure above the frame to maintain the structural form of the cross-frame after erection, and can also serve as a vertical movement limit member to prevent the upper frame from moving out of the frame below it during the erection of the cross-frame and to avoid affecting the stability of the overall structure of the cross-frame due to too little overlap between the upper frame and the frame below it. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the completed erection of the pulley-based lifting span.

[0018] Figure 2 This is a schematic diagram of the layout of the cable, locking structure and limiting structure.

[0019] Figure 3 Schematic diagram of cable winding.

[0020] Figure 4 A is a side view of point A.

[0021] Figure 5 It is a schematic diagram of a part of the frame in a top view.

[0022] Figure 6 Schematic diagram of the overall structure of the shell part.

[0023] Figure 7 Schematic diagram of the structure inside the shell.

[0024] Figure 8 It is a structural diagram of the control rod part.

[0025] Figure 9 It is a schematic diagram of part of the structure inside the shell.

[0026] Figure 10 Schematic diagram of the locking structure in the unlocked state and the unlocked state.

[0027] Figure 11 It is a structural schematic diagram of the limiting structure in a non-limiting state.

[0028] Figure 12 It is a structural schematic diagram of the limiting structure in the limiting state.

[0029] Figure 13 Schematic diagram of the connection between the cable and the drive member.

[0030] Figure 14 This is a schematic diagram of the spanning rack in use.

[0031] Reference numerals 10. Vertical sleeve; 11. First frame; 12. Second frame; 13. Third frame; 14. Fourth frame; 15. Fifth frame; 16. Sixth frame; 17. Pulley 1; 18. Pulley 2; 19. Cable; 20. Locking structure; 21. Housing; 221. First pulley; 222. Second pulley; 223. Third pulley; 224. Movable pulley; 23. Control rod; 231. Extension rod; 241. First axial slide; 242. Fixed block; 251. Second axial slide; 2521. Rod; 2522. First limit groove; 261. Card Slot; 262, block; 271, first block; 272, second block; 2731, second limiting slot; 2732, first connecting rod; 2733, second connecting rod; 2734, third connecting rod; 30, limiting structure; 311, inner frame; 312, outer frame; 32, engaging area; 321, stop block; 331, first rod; 332, connecting member; 333, second rod; 341, elastic member; 342, connecting block; 35, spring; 36, cross bar; 37, control rope; 40, transverse support frame; 50, driving member; 60, protective net. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] It should also be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0034] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0035] like Figures 1-14 As shown, the present invention provides a spanning frame based on pulley lifting, comprising: The vertical sleeve 10 includes a plurality of frames with successively smaller cross-sectional dimensions, each frame being wound in sequence by a cable 19 in conjunction with a pulley to form a layer-by-layer sleeve structure in which the free end of the cable 19 is output from the bottom frame; The locking structure 20 is provided at least on the frame from the second top layer to the second bottom layer, so as to switch the cable 19 wound around the frame between two states: being fixed to the frame and being movable relative to the frame; The limiting structure 30 is provided between two adjacent frames, and includes a clamping area 32 located on the inner frame 311 and a connecting rod mechanism and an elastic movable member provided on the outer frame 312, so that in the initial state, the lower rod of the connecting rod mechanism abuts against the side wall of the inner frame 311, so that the elastic movable member is in a contracted state. When the inner frame 311 moves to a specific height relative to the outer frame 312, the elastic movable member extends under the action of the restoring force and drives the connecting rod mechanism to move, so that the lower rod of the connecting rod mechanism and the elastic movable member are clamped in the clamping area 32 and the part of the rod located at the upper part of the connecting rod mechanism rotates until both ends are tightly abutted between the side walls of the inner and outer frames, so that the limiting structure 30 is in a limiting state that limits the horizontal orientation of the adjacent frames and bears the load at the same time; and A horizontal support frame 40 is connected to the top of the vertical sleeve frame 10; The driving member 50 is connected to the free end of the cable 19 to provide a driving force for adjusting the vertical sleeve 10 to rise and fall.

[0036] Specifically, for a single frame, pulleys are provided on the upper and lower parts of the frame, so that two sections of load-bearing cables 19 are arranged on the bottom surface of the frame to be lifted, so as to improve the stability of the drive adjustment.

[0037] In this example, Figure 1 and Figure 2 As shown, the vertical frame 10 includes six frames with successively smaller cross-sectional dimensions, namely, the first frame 11, the second frame 12, the third frame 13, the fourth frame 14, the fifth frame 15, and the sixth frame 16, arranged vertically upward. Each frame 12 through 15 has two pulleys at the top and four pulleys at the bottom. The four pulleys at the bottom are arranged in pairs, with each set of pulleys located on either side of the frame bottom and parallel to each other and the frame sides. The two pulleys at the top are located on either side of the frame top, with the line connecting the two pulleys not parallel to the frame sides. The pulleys on the first frame 11 are arranged in the same manner as the second through fifth frames 15, with two pulleys at the top and one pulley at the bottom, corresponding to the pulleys at the top. That is, after the cable 19 passes through the pulleys of each frame, two sections of load-bearing cable 19 are laid out on the bottom of the frame to be raised or lowered, to enhance the stability of the drive adjustment.

[0038] The cables 19 are arranged in such a way that the vertical sleeve 10 is raised step by step from the inside to the outside under the action of tension. Figure 2 In the example, the arrangement of the cables 19 is illustrated by taking four frames as an example. The arrangement of the cables 19 of the six frames in this example is the same as that of the Figure 2When the cable 19 is laid out, it first passes through each frame from bottom to top, and then passes through each frame from the top frame downward until both ends of the cable 19 extend outward from the bottom of the first frame 11. The ends of the cable 19 are then connected to the driving member 50, and the driving member 50 drives the cable 19 to control the raising and lowering of the vertical sleeve 10. Specifically, when the cable 19 is laid out from bottom to top, it passes through one set of pulleys at the bottom of the second frame 12 to the sixth frame 16. When the cable 19 is laid out from top to bottom, it passes through the sixth frame 16 to another set of pulleys at the bottom of the second frame 12.

[0039] The specific arrangement of the cable 19 is described below. For the convenience of description, the two pulleys in the bottom pulley group from the second frame 12 to the sixth frame 16, in which the cable 19 is wound from bottom to top, are referred to as pulley one 17, and the two pulleys in the bottom pulley group from the second frame 12 to the sixth frame 16, in which the cable 19 is wound from top to bottom, are referred to as pulley two 18.

[0040] The specific arrangement method of the cable 19 is as follows: one end of the cable 19 passes around the bottom pulley on the right side of the first frame 11 and passes around the top pulley on the right side of the first frame 11 upwards, then passes around the bottom pulley 17 on the right side of the second frame 12, extends along the bottom surface of the second frame 12 to the left side of the second frame 12, passes around the bottom pulley 17 on the left side of the second frame 12, passes around the top pulley on the left side of the second frame 12 upwards, then passes around the bottom pulley 17 on the left side of the third frame 13, extends along the bottom surface of the third frame 13 to the right side of the third frame 13, passes around the bottom pulley 17 on the right side of the third frame 13, passes around the top pulley on the right side of the third frame 13 upwards, and according to this winding rule, passes around the pulleys on the fourth frame 14 and the fifth frame 15 upwards in turn, then the cable 19 passes around the top pulley on the right side of the fifth frame 15 and passes around the bottom pulley 17 on the right side of the sixth frame 16 and the bottom pulley 17 on the left side of the sixth frame 16 in turn, and then passes around the top pulley on the left side of the sixth frame 16 upwards ( Figure 3 a), then continue to extend to the right side of the sixth frame 16, bypass the top pulley on the right side of the sixth frame 16, extend downward to bypass the second bottom pulley 18 on the right side of the sixth frame 16, and extend along the bottom surface of the sixth frame 16 to the left bottom of the sixth frame 16, bypass the second bottom pulley 18 on the left side of the sixth frame 16, and set the cable 19 in the same way as from bottom to top ( Figure 3 b) so that the two ends of the cable 19 are respectively passed around the two pulleys at the bottom of the first frame 11 and extend outwards to be connected to the driving member 50.

[0041] In this example, both ends of the cable 19 extend from the same side of the first frame 11 to connect to the driving member 50 ( Figure 13 ), in other embodiments, the two ends of the cable 19 can also extend from both sides of the first frame 11 in a direction away from the first frame 11 to connect with the two driving members 50.

[0042] Specifically, the frame is a hollow structure to effectively reduce its own weight.

[0043] Specifically, locking structures 20 are provided on the first frame 11 to the fifth frame 15, wherein the locking structures 20 on the second frame 12 to the fifth frame 15 are used to cooperate with the cable and the limiting structure 30 to control the lifting and lowering of the vertical sleeve 10, and the locking structure 20 on the first frame 11 is used to fix the cable 19.

[0044] The locking structure 20 includes a fixed pulley fixed to the frame, a movable pulley 224 arranged above the fixed pulley, a control component for controlling the state of the movable pulley 224, and a clamping component with a clamping point between the movable pulley 224 and the fixed pulley, so that under the regulation of the control component, the movable pulley 224 is converted between a fixed state and a movable state, wherein, when the movable pulley 224 is in a fixed state, the clamping component is in a loose state; when the movable pulley 224 is in a movable state, under the action of the tension of the cable 19, the movable pulley 224 moves and drives the clamping component to convert into a clamping state for clamping the cable 19.

[0045] like Figure 4 and Figure 6 As shown, a housing 21 is provided on the frame, and the locking structure 20 is located within the housing 21. For example, the housing 21 is connected by two detachably connected shell plates, so that the sides of the housing 21 are open. A first pulley 221 is provided at the top of the housing 21, and a second pulley 222 is provided at the bottom, for regulating the entry and exit of the cable 19 into and out of the housing 21.

[0046] like Figure 7 As shown, the fixed pulley is a third pulley 223 disposed inside the housing 21 and below the first pulley 221, and the movable pulley 224 is located above the third pulley 223 on the side near the second pulley 222. The cable 19 enters the housing 21 from the top, passes through the first pulley 221, the third pulley 223, the movable pulley 224, and the second pulley 222 in sequence, and exits the housing 21 from the bottom. Alternatively, the cable 19 enters the housing 21 from the bottom, passes through the second pulley 222, the movable pulley 224, the third pulley 223, and the first pulley 221 in sequence, and exits the housing 21 from the top.

[0047] like Figure 6-Figure 8As shown, the control assembly includes a control rod 23 connected to the axis of the movable pulley 224 through a sliding assembly, and the control rod 23 is connected to the frame body through a sliding mechanism at one end near the first pulley 221, and the control rod 23 is connected to the frame body through a locking mechanism at one end near the second pulley 222. The sliding mechanism is a slide slider structure, including a first axial slide groove 241 provided on the control rod 23 and a fixed block 242 provided on the housing 21 adapted to the first axial slide groove 241; the sliding assembly includes a second axial slide groove 251 provided on the control rod 23 and a limit rod group adapted to the second axial slide groove 251, and the two shell plates are correspondingly provided with first limit grooves 2522. The limit rod group includes a rod 2521 that passes through the axis of the movable pulley 224 and passes through the second axial slide groove 251, while both ends are located in the first limit grooves 2522 on the two shell plates, so that when the movable pulley 224 is in an active state, it moves along the first limit groove 2522.

[0048] The locking mechanism includes a slot 261 provided on the control rod 23 and a block 262 fixed on the housing 21. The block 262 and the fixed block 242 are located at the same height, so that in the initial state, the slot 261 is engaged with the block 262, and the control rod 23 is in a horizontal fixed state. Under the force acting in the direction from the block 262 to the fixed block 242, the control rod 23 moves horizontally in the same direction, and the slot 261 is disengaged from the block 262. At the same time, the first axial slot 241 moves relative to the fixed block 242, and the second axial slot 251 moves relative to the rod 2521. At this time, the control rod 23 is not restricted by the slot 261 and the block 262, and is in a rotating state that can rotate around its sliding connection end with the housing 21. The two axial slots are provided to ensure that when the slot 261 is disengaged from the block 262, it will not be unable to move laterally due to the limitation of the driven pulley 224 and the fixed block 242.

[0049] The control rod 23 is connected to an extension rod 231 extending from a side surface of the housing 21 to the outside of the housing 21 , so that the control rod 23 can be adjusted by applying an external force to the extension rod 231 .

[0050] Specifically, the clamping assembly includes a first block 271 fixed to the housing 21 and a second block 272 that can move with the pulley 224 to switch between a clamping state and a loose state with the first block 271. For example, Figure 6 and Figure 9As shown, the first block 271 is located above the third pulley 223; the two shell plates are correspondingly provided with second limiting grooves 2731, and a first connecting rod 2732 is connected between the two second limiting grooves 2731. The first connecting rod 2732 is sleeved with a second connecting rod 2733 that can rotate relative to the first connecting rod 2732. The second connecting rod 2733 is connected to the shell 21 through a rotating pair at one end away from the first connecting rod 2732. The second block 272 is sleeved on the first connecting rod 2732 and fixedly connected to the first connecting rod 2732. The first connecting rod 2732 is also connected to the rod body through the third connecting rod 2734, so that when the movable pulley 224 moves, the third connecting rod 2734 drives the first connecting rod 2732 to move along the second limiting groove 2731, so that the second block 272 and the first block 271 form a clamping shape.

[0051] The arrangement of the first limiting groove 2522 and the second limiting groove 2731 enables the movable pulley 224 to move along a preset path under the pulling force of the cable 19 and drive the second block 272 to move along the preset path to cooperate with the first block 271 to clamp the cable 19.

[0052] Specifically, for a single frame, since cables 19 are arranged on both sides of the frame, in this example, each frame is provided with two locking structures 20 corresponding to the cables 19. The locking structure 20 is arranged at the lower part of the frame ( Figure 2 、 Figure 4 ) for easy operation.

[0053] The locking control of the locking structure 20 is specifically as follows: in the initial state, the control rod 23 is engaged with the block 262 to make the movable pulley 224 fixed. At this time, the locking structure 20 is in the unlocked state ( Figure 10 a); Under the action of external force, the control rod 23 is forced to move horizontally until the slot 261 and the block 262 are disengaged and rotated, making the movable pulley 224 movable. Under the pulling force of the cable 19, the movable pulley 224 moves downward, driving the second block 272 to move closer to the first block 271 until it forms a clamping state with the first block 271 to clamp the cable 19. At this time, the locking structure 20 is in a locked state ( Figure 10 b) The cable 19 and the housing 21 remain relatively fixed, that is, the cable 19 and the corresponding frame remain relatively fixed. When the locking structure 20 needs to be adjusted from the locked state to the unlocked state, the cable 19 is free of force and the control lever 23 is rotated until it engages with the locking block 262.

[0054] When the locking structure 20 is in the locked state, the angle of rotation of the control rod 23 can be designed according to actual conditions, so that the locking structure 20 can control the cable 19 to remain relatively fixed relative to the frame body, thereby meeting the lifting requirements of the spanning frame.

[0055] Specifically, the limiting structure 30 is used to limit the horizontal position of adjacent shelf bodies and also to bear the weight. Figure 2 and Figure 5 As shown, there are eight limiting structures 30 between two adjacent frames, and the eight limiting structures 30 are distributed corresponding to the four corners of the frames. Figure 5 Only a portion of the frame is shown in a top view.

[0056] Since the limiting structure 30 is disposed between two adjacent frames, the frames are divided into an inner frame 311 and an outer frame 312 in the following description for easier understanding.

[0057] Specifically, such as Figure 11 As shown, the connecting rod mechanism includes a first rod body 331 with one end rotatably connected to the outer frame body 312 and a second rod body 333 connected to the first rod body 331 through a connecting piece 332. The second rod body 333 is located above the first rod body 331 and one end of which is rotatably connected to the outer frame body 312, so that the second rod body 333 rotates around the connection end of the second rod body 333 and the frame body as the first rod body 331 rotates. The first rod body 331 is also connected to the outer frame body 312 through a spring 35, which is in a stretched state when the limiting structure 30 is in a limited state and is in a freely retractable state in the initial state.

[0058] For example, Figure 12 As shown, when the limiting structure 30 is in a limiting shape, the top surface of the first rod body 331 and the second rod body 333 are both inclined obliquely downward in the direction close to the outer frame 312, wherein the inclined setting of the top surface of the first rod body 331 is conducive to cooperating with the elastic moving part for limiting adjustment, and the inclined setting of the second rod body 333 is conducive to limiting the first rod body 331 to a certain extent, so as to utilize the abutment between the second rod body 333 and the side wall of the inner frame 311 to prevent the first rod body 331 from rotating away from the outer frame 312; the connecting member 332 is an arc-shaped rod, and both ends of the connecting rod are respectively connected to the top of the first rod body 331 and the middle of the second rod body 333 through a rotating pair.

[0059] The elastic movable member includes an elastic member 341 fixed at one end to the outer frame 312, and a connecting block 342 connected to the freely extending portion of the elastic member 341 and shaped to match the shape of the first rod 331 to facilitate position limiting. The bottom surface of the connecting block 342 abuts the top of the first rod 331. A control rope 37 is also connected to the connecting block 342 for pulling the elastic movable member back to its initial contracted state. The end of the control rope 37 away from the connecting block 342 extends to the outside of the frame through a hollow portion of the frame, or a corresponding hole is provided in the frame to allow the control rope 37 to extend to the outside of the frame, thereby applying force.

[0060] In this example, when the limiting structure 30 is in the limiting shape, the top surface of the connecting block 342 is horizontal, and the bottom surface is inclined downward in a direction close to the outer frame 312.

[0061] The outer frame 312 for setting the connection mechanism is further provided with a cross bar 36 for limiting the rotation degree of the first rod 331 , and the cross bar 36 is located below the spring 35 .

[0062] The elastic modulus of the elastic member 341 is greater than the elastic modulus of the spring 35. When the first rod 331 is adjusted to rotate, the restoring force of the spring 35 is used to rotate the first rod 331 to its initial state. At the same time, the spring 35 is prevented from hindering the elastic member 341 from extending due to the restoring force and driving the connecting block 342 and the first rod 331 to engage with the engaging area 32.

[0063] The engaging area 32 is provided on the bottom surface of the inner frame 311 and is composed of the bottom surface of the inner frame 311 and a stopper 321 provided on the bottom surface of the inner frame 311 and extending obliquely downward in a direction close to the outer frame 312. By engaging the top of the first rod 331 and the connecting block 342 in the engaging area 32, the limiting structure 30 can be used to support the frame. At the same time, the connection between the first rod 331 and the second rod 333 can be used to drive the second rod 333 to rotate so as to define the horizontal position of the adjacent frames by the second rod 333, and the rotation of the first rod 331 can also be limited by the second rod 333. That is, when the limiting structure 30 is converted from a non-limiting state to a limiting state, the first rod 331 is simultaneously limited by the stopper 321 and the second rod 333 to remain in a fixed state.

[0064] The limiting control of the limiting structure 30 is specifically as follows: in the initial state, the top of the first rod 331 abuts against the side wall of the inner frame 311, the spring 35 is in a free extension state, the elastic member 341 is in a compressed state, and the end of the second rod 333 away from the outer frame 312 does not contact the inner frame 311, and the limiting structure 30 is in a non-limiting state ( Figure 11 When the inner frame 311 moves to a predetermined height relative to the outer frame 312, that is, the engaging area 32 is opposite to the top of the first rod 331, the inner frame 311 no longer restricts the first rod 331, and the elastic member 341 is extended by the restoring force, driving the connecting block 342 to move, thereby causing the first rod 331 that is in contact with the connecting block 342 to rotate to the top of the first rod 331 and the connecting block 342 to be engaged in the engaging area 32, and the second rod 333 rotates until its two ends are tightly pressed between the side walls of the inner and outer frame 312. At this time, the limiting structure 30 is in a limiting state ( Figure 12), the spring 35 is in a stretched state. When the limiting structure 30 needs to be adjusted to a non-limiting state, the control rope 37 is pulled to return the elastic member 341 to its initial contracted state. At this time, under the restoring force of the spring 35, the first rod 331 rotates to its initial state, and the second rod 333 also rotates to its initial state, allowing the frame to be disassembled.

[0065] Specifically, the elastic member 341 is configured to be in a free extension state when the limiting structure 30 is in the limiting state.

[0066] Specifically, the transverse support frame 40 is an existing folding frame or a telescopic frame.

[0067] The present invention also provides a method for using a pulley-lifting spanning frame, comprising the following steps: S1. Place two vertical sleeves 10 on the ground with a gap between them, and fix the first frame 11 of the vertical sleeves 10 on the ground; at the same time, unfold the horizontal support frame 40; S2. The driving member 50 is activated to wind the cable 19. Since the sixth frame 16 has the smallest deadweight, the movement of the cable 19 drives the sixth frame 16 upward. When the sixth frame 16 reaches a predetermined height, the elastic movable member between the sixth frame 16 and the fifth frame 15 pops out, causing the limiting structure 30 to be in a limited position. At this point, the sixth frame 16 and the fifth frame 15 remain relatively fixed to form an integral structure. Thereafter, the locking structure 20 on the fifth frame 15 is adjusted to a locked state. S3, the driving member 50 continues to wind the cable 19. Since the sixth frame 16 and the fifth frame 15 are in a fixed state, and the cable 19 arranged around the fifth frame 15 is relatively fixed to the fifth frame 15 by the locking structure 20, the movement of the cable 19 will drive the fifth frame 15 to move upward. According to the operation in step S2, the fifth frame 15 and the fourth to second frames 12 are raised, that is, the raising of the spanning frame is completed ( Figure 1 ), and finally, the locking mechanism on the first frame 11 is adjusted to a locked state so that the cable 19 on the first frame 11 also remains relatively fixed to the first frame 11; S4. After the construction is completed, the locking mechanisms on the first frame 11 and the second frame 12 are adjusted to the unlocked state, and the driving member 50 is activated to provide a pulling force equal to the sum of the deadweights of the remaining frames except the first frame 11, so that the limiting structure 30 between the first frame 11 and the second frame 12 does not bear any weight, thereby facilitating the adjustment of the limiting structure 30. At this time, the limiting structure 30 between the first frame 11 and the second frame 12 is adjusted to the unlocked state, and the cable 19 is released by the driving member 50 to cause the second frame 12 to fall. S5. Adjust the limiting structure 30 between the second frame 12 and the third frame 13 to a non-limiting state, start the driving member 50 to provide a pulling force equal to the sum of the self-weight of the remaining frames except the first frame 11 and the second frame 12, so that the limiting structure 30 located between the second frame 12 and the third frame 13 does not bear weight, and release the cable 19 through the driving member 50 to make the third frame 13 fall; and complete the falling of the remaining frames in sequence according to steps S4 and S5, that is, complete the disassembly of the cross-frame.

[0068] Specifically, after the installation of the span frame is completed, the protective net 60 is installed on the two transverse support frames 40 using a drone according to the existing technology ( Figure 14 ).

[0069] Specifically, in step S4, the operation of adjusting the limiting structure 30 between the first frame 11 and the second frame 12 to a non-limiting state is as follows: the elastic movable member is forced to move out of the engaging area 32, and the lower rod of the connecting rod mechanism is retracted between the side walls of the adjacent frames.

[0070] The erection and disassembly of the spanning frame are completed by the cooperation of the locking structure 20 and the limiting structure 30. Specifically, during the erection of the spanning frame, after the sixth frame 16 is raised, the limiting structure 30 can limit the horizontal and vertical positions of the sixth frame 16 relative to the fifth frame 15, so that the sixth frame 16 is in a relatively stable state relative to the fifth frame 15. At the same time, there is no need to manually judge whether the sixth frame 16 has risen to a preset height relative to the fifth frame 15, which effectively saves operation time. In addition, the locking structure 20 is used to keep the cable 19 on the side wall of the fifth frame 15 relatively fixed to the fifth frame 15, so that When the subsequent driving member 50 continues to wind the cable 19, the length of the cable 19 of the fifth frame 15 and the sixth frame 16 no longer changes, that is, the sixth frame 16 is no longer forced to rise, but the fifth frame 15 is forced to rise. This limiting method of the locking structure 20 can achieve the orderly rise of each frame. Since the limiting structure 30 can only bear the weight to limit the raised frame from falling, if the locking structure 20 is not set, when the driving member 50 continues to wind the cable 19, the limiting structure 30 cannot limit the rise of the sixth frame 16, which will make it impossible to achieve the rise of the cross-frame and may also cause damage to the limiting structure 30.

[0071] During the disassembly of the crossing frame, since the first frame 11 cooperates with the limiting structure 30 thereon to bear the gravity above, the cable 19 does not bear the weight at this time. By starting the driving member 50 and slightly loosening the corresponding cable 19 section, the control rod 23 can be manually controlled to a fixed state, so that the locking structure 20 is in an unlocked state; thereafter, the driving member 50 is used to provide a pulling force so that the weight of the second frame 12 and the weight above it is borne by the cable 19, and the limiting structure 30 can be adjusted to a non-limiting state to prevent the limiting structure 30 from affecting the falling of the frame, and then the disassembly of the frame is completed in an orderly manner through the alternating force bearing of the locking structure 20 and the limiting structure 30.

[0072] That is, the present invention can achieve orderly rising and falling of the frame through the specific arrangement of the cables 19 in combination with the locking structure 20 and the limiting structure 30.

[0073] When the spanning frame is erected to support the protective net 60, the limiting structure 30 can bear the weight of the frame and keep the adjacent frames relatively fixed, thereby ensuring the stability of the spanning frame during operation.

[0074] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A spanning frame based on pulley lifting, characterized in that: include: The vertical sleeve frame includes a plurality of frames with successively smaller cross-sectional dimensions, each frame being wound in sequence by a cable and a pulley to form a layer-by-layer sleeve structure in which the free end of the cable is output from the bottom frame; A locking structure is provided on at least the frame from the second top layer to the second bottom layer, so as to switch the cable wound around the frame between two states: being fixed to the frame and being movable relative to the frame; A limiting structure, wherein multiple limiting structures are arranged between two adjacent frames, including a clamping area located on the inner frame and a connecting rod mechanism and an elastic movable member located on the outer frame, so that in an initial state, the lower rod body of the connecting rod mechanism abuts against the side wall of the inner frame so that the elastic movable member is in a contracted state; when the inner frame moves to a specific height relative to the outer frame, the elastic movable member extends under the restoring force and drives the connecting rod mechanism to move, so that the lower rod body of the connecting rod mechanism and the elastic movable member are clamped in the clamping area and part of the rod body of the upper part of the connecting rod mechanism rotates until both ends abut against the side walls of the inner and outer frames, so that the limiting structure is in a limiting state that limits the horizontal orientation of the adjacent frames and bears the load at the same time; as well as A horizontal support frame connected to the top of the vertical sleeve frame; A driving member is connected to the free end of the cable.

2. The pulley-based lifting span frame according to claim 1, characterized in that: The locking structure includes a fixed pulley fixed to the frame, a movable pulley arranged above the fixed pulley, a control component for controlling the state of the movable pulley, and a clamping component with a clamping point between the movable pulley and the fixed pulley, so that under the regulation of the control component, the movable pulley is converted between a fixed state and a movable state, wherein, when the movable pulley is in a fixed state, the clamping component is in a loose state; when the movable pulley is in a movable state, under the action of the cable tension, the movable pulley moves and drives the clamping component to convert into a clamping state for clamping the cable.

3. The pulley-based lifting spanning frame according to claim 2 is characterized in that: The control assembly includes a control rod connected to the frame body at both ends through a sliding mechanism and a locking mechanism respectively. The control rod is also connected to the axis of the movable pulley through the sliding assembly, so that in the initial state, the control rod is in a fixed state so that the movable pulley is fixed. Under the action of external force, the control rod moves relative to the movable pulley and the frame body to a rotating state in which it can rotate around its sliding connection end with the frame body, so that the movable pulley is movable.

4. The pulley-based lifting spanning frame according to claim 2, characterized in that: The clamping assembly comprises a first block fixed on a frame and a second block which can move with a movable pulley to switch between a clamping state and a loose state with the first block.

5. The pulley-based lifting span frame according to claim 1, characterized in that: The connecting rod mechanism includes a first rod body having one end rotatably connected to the frame body and a second rod body connected to the first rod body through a connecting piece. The second rod body is located above the first rod body and one end of the second rod body is rotatably connected to the frame body, so that the second rod body rotates around the connection end of the second rod body and the frame body as the first rod body rotates. The first rod body is also connected to the frame body through a spring which is in a stretched state when the limiting structure is in a limited state and is in a freely retractable state when the limiting structure is in an initial state.

6. The pulley-based lifting spanning frame according to claim 5, characterized in that: The elastic moving member includes an elastic member with one end fixed on the frame and a connecting block connected to the free extension portion of the elastic member and having a shape that matches the shape of the first rod body to facilitate position limiting.

7. The pulley-based lifting spanning frame according to claim 6, characterized in that: The elastic modulus of the elastic member is greater than the elastic modulus of the spring.

8. The pulley-based lifting span frame according to claim 1, characterized in that: The cables are arranged in a manner such that the vertical sleeves are raised step by step from the inside to the outside under the action of tension.

9. A method for using the pulley-based lifting spanning frame according to claim 1, characterized in that: The following steps are involved: S1. Place two vertical frames on the ground at intervals; S2, starting the driving member to wind the cable, and the innermost frame moves upward. When the innermost frame moves to a predetermined height, the elastic moving member between the innermost frame and the second innermost frame pops out to put the limiting structure in a limited position; S3, adjusting the locking structure on the secondary inner frame so that the cable wound around the secondary inner frame and the secondary inner frame remain in a relatively fixed locked state, causing the driving member to continue winding the cable, and the secondary inner frame to move upward. According to the operations of steps S2 and S3, the secondary inner frame and the remaining frames to be raised are raised, that is, the raising of the spanning frame is completed; S4. After the construction is completed, the locking mechanism on the sub-bottom frame is adjusted to an unlocked state, the driving member is activated to provide a pulling force, the limiting structure between the bottom frame and the adjacent sub-bottom frame is adjusted to an unrestricted state, and the cable is released by the driving member to cause the sub-bottom frame to fall; S5. Complete the lowering of the remaining frames in sequence according to the method of step S4, that is, complete the disassembly of the spanning frame.

10. The method of use according to claim 9, characterized in that: In step S4, the operation of adjusting the limiting structure between the bottom frame and the adjacent second bottom frame to a non-limiting state is specifically: the elastic movable member is forced to move out of the engaging area, and the lower rod of the connecting rod mechanism is retracted between the side walls of the adjacent frames.

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