An extended ladder and maintenance platform

Abstract

This utility model relates to the field of scaffolding and discloses an extended ladder frame and maintenance platform. The extended ladder frame includes an adjusting base, which comprises a base, an adjusting component disposed at the top of the base, and a connecting frame adapted to the adjusting component. The telescopic ladder includes a fixed frame, an adjusting frame slidably connected to the fixed frame, an operating component disposed at the bottom of the fixed frame, a transmission component disposed at one end of the fixed frame near the adjusting frame, and a chain for connecting the operating component and the transmission component. This design not only allows for precise adaptation to different working heights and angles through the combined operation of handwheels and handles, but also ensures stability during high-altitude operations through electromagnetic adsorption. Furthermore, the folding footboard and telescopic ladder facilitate storage while reducing the volume of the equipment. Compared to traditional fixed ladder frames, it achieves the advantages of continuous position adjustment without disassembly and rapid storage.

Description

Technical Field

[0001] This utility model relates to the field of scaffolding, and in particular to an extended ladder and maintenance platform. Background Technology

[0002] In the field of industrial equipment maintenance, traditional ladder racks are mostly fixed structures, which have significant drawbacks. These fixed ladder racks cannot be flexibly adjusted in height and angle according to actual work requirements, often necessitating the replacement of multiple ladder racks or complex on-site modifications when maintaining equipment of different specifications. Particularly in the maintenance of irregularly shaped equipment such as volutes, fixed ladder racks cannot adapt to the curved surface structure, severely impacting maintenance efficiency and quality. Furthermore, the non-adjustable nature of fixed ladder racks occupies considerable space during transportation and storage, increasing operating costs. This inherent limitation of non-adjustability severely restricts the applicability and efficiency of ladder racks in industrial maintenance. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is that the application range of traditional fixed ladder racks is limited because they cannot be adjusted.

[0004] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes an extended ladder frame, which includes,

[0005] An adjustment base, comprising a base, an adjustment component disposed on the top of the base, and a connecting bracket adapted to and installed with the adjustment component;

[0006] A telescopic ladder includes a fixed frame, an adjustable frame slidably connected to the fixed frame, an operating component disposed at the bottom of the fixed frame, a transmission component disposed at one end of the fixed frame near the adjustable frame, and a chain for connecting the operating component and the transmission component. The top of the fixed frame and the adjustable frame are fixedly connected to a railing, and the bottom of the fixed frame is provided with a support rod.

[0007] A pedal, which is connected to the adjustment frame;

[0008] Specifically, by placing the adjusting seat on the scaffold, and then controlling the adjusting component, the connecting frame can be moved, thereby adjusting the position of the telescopic ladder. Then, by controlling the operating component and driving the transmission component through the chain, the adjusting frame slides along the fixed frame, ultimately connecting the pedal and the volute. Compared to traditional fixed ladder frames, this device can adapt to different environments through two sets of different levels of adjustment, and it can be stored properly without disassembly, simply by retracting the device.

[0009] In a preferred embodiment of the extended ladder frame of this utility model: the adjustment assembly includes a mounting bracket fixedly connected to the top of the base, a lead screw mounted on the inner side of the mounting bracket via a bearing, a handwheel fixedly connected to one end of the lead screw, and a guide rail fixedly connected to the top of the mounting bracket; rotating the handwheel will drive the lead screw to rotate.

[0010] In a preferred embodiment of the extended ladder frame of this utility model: the connecting frame includes a connecting plate, a hinge frame fixedly connected to the top of the connecting plate, guide wheels disposed on both sides of the bottom end of the connecting plate, a bottom block fixedly connected to the center of the bottom end of the connecting plate, a threaded seat fixedly connected to the center of the bottom end of the bottom block, and guide blocks fixedly connected to both sides of the bottom end of the bottom block.

[0011] The fixed frame is hinged to the hinge frame, the guide block is slidably connected to the top of the guide rail, and the threaded seat is threadedly connected to the lead screw.

[0012] Specifically, when the lead screw rotates, under the guidance of the guide rail on the guide block, and in conjunction with the connection between the threaded seat and the lead screw, the connecting plate is driven to adjust its position, thereby driving the fixed frame connected to the hinge frame to adjust its position; at the same time, the design of the guide wheel can improve the smoothness of the movement of the connecting plate.

[0013] In a preferred embodiment of the extended ladder frame of this utility model: a rack is fixedly connected to the center of the bottom end of the adjusting frame; when the driven gear rotates, it will drive the rack to move, thereby driving the adjusting frame to slide along the fixed frame.

[0014] In a preferred embodiment of the extended ladder frame of this utility model: the operating component includes a first plate fixedly connected to the bottom end of the fixed frame, a second plate fixedly connected to the bottom end of the fixed frame, a rotating rod mounted and connected to the first plate and the second plate via the bearing, a drive sprocket fixedly connected to the outside of the rotating rod, and a handle fixedly connected to one end of the rotating rod;

[0015] Specifically, turning the handle will cause the rotating rod to rotate, which in turn will cause the drive sprocket to rotate.

[0016] In a preferred embodiment of the extended ladder frame of this utility model: the transmission assembly includes an assembly plate fixedly connected to one end of the fixed frame near the adjusting frame, a first transmission rod rotatably connected to the inner side of the assembly plate, a second transmission rod rotatably connected to the inner side of the assembly plate, a driven sprocket fixedly connected to the outer side of the first transmission rod, a driving gear fixedly connected to the outer side of the first transmission rod, and a driven gear fixedly connected to the outer side of the second transmission rod.

[0017] The driving sprocket and the driven sprocket are connected by the chain, the driving gear meshes with the driven gear, and the driven gear meshes with the rack.

[0018] Specifically, when the drive sprocket rotates, it drives the driven sprocket to rotate under the transmission of the chain. The driven sprocket drives the drive gear to rotate through the first transmission rod, and the drive gear drives the driven gear to rotate.

[0019] In a preferred embodiment of the extended ladder frame of this utility model: the support rod includes an L-plate fixedly connected to the bottom end of the fixed frame, an upper rod hinged to the bottom end of the L-plate, a screw threaded to the bottom end of the upper rod, and a lower rod fixedly connected to the bottom end of the screw.

[0020] Specifically, rotating the lower rod will drive the screw to rotate, thereby adjusting the length of the screw at the bottom of the upper rod. This allows for adjustment of the height of the support rod according to different terrains, thus providing effective support for the telescopic ladder. Simultaneously, a magnetic lifter is installed at the bottom of the lower rod. By controlling the handle of the magnetic lifter, it can be opened and closed, achieving magnetic connection and disconnection between the magnetic lifter and the volute, further ensuring the overall stability of the equipment.

[0021] In a preferred embodiment of the extended ladder frame of this utility model: the tread includes a main board hinged to the adjusting frame, a guardrail fixedly connected to the top of the main board, a side plate hinged to the bottom of the main board, and a chain for the guardrail and the railing at the top of the adjusting frame;

[0022] Specifically, after the extension of the adjustment frame is properly adjusted, the main board is rotated to connect the main board and the volute. At this time, the side plate is rotated to extend it, increasing the range of the working platform. In addition, the chain connection can protect personnel while also increasing the connection strength between the adjustment frame and the pedal. Furthermore, a suction cup electromagnet is provided at the bottom of the main board. By controlling the on and off of the suction cup electromagnet, the magnetic connection and disconnection between the suction cup electromagnet and the volute can be achieved, further ensuring the overall stability of the equipment.

[0023] This utility model also provides a maintenance platform, including the aforementioned extension ladder, and further comprising,

[0024] The scaffolding comprises uprights, horizontal bars connected to the uprights, diagonal braces connected to the uprights, and diagonal support bars connected to the uprights. A hanging board is laid on the top of the horizontal bar, and a hanging ladder is laid on the outside of the horizontal bar.

[0025] Specifically, the bottom of the upright is equipped with height-adjustable casters to adapt to the curved space inside the volute, and the hanging ladder allows personnel to go up and down the scaffold. The hanging plate is used to support personnel, the adjustable seat, and various necessary equipment.

[0026] In a preferred embodiment of the maintenance platform of this utility model, it further includes a disc buckle fixedly connected to the outside of the upright, a locking hole opened at the top of the disc buckle, and a locking rod engaged with the locking hole. The disc buckle is used for splicing the horizontal bar, the diagonal brace, the diagonal support rod, and the upright. Installation can be completed by aligning one end opening of the horizontal bar, the diagonal brace, and the diagonal support rod with the locking hole specified by the disc buckle and inserting the locking rod.

[0027] The beneficial effects of this utility model are as follows: the design can not only accurately adapt to different working heights and angles through the combined operation of the handwheel and handle; it can also ensure the stability of high-altitude operations through electromagnetic adsorption; moreover, the folding pedal and telescopic ladder can facilitate storage while reducing the volume of equipment storage. Compared with traditional fixed ladders, it achieves the significant advantages of continuous position adjustment without disassembly and rapid storage. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model, and are not intended to limit the utility model.

[0029] Figure 1 A schematic diagram of the overall structure of this utility model in use is shown.

[0030] Figure 2 A schematic diagram of the overall structure of the extension ladder frame of this utility model is shown.

[0031] Figure 3 A schematic diagram of the overall structure of the adjustment seat of this utility model is shown.

[0032] Figure 4 A top view of the adjustment seat of this utility model is shown.

[0033] Figure 5 The front view of the connecting frame of this utility model is shown.

[0034] Figure 6 The figure shows a bottom view of the extended ladder frame of this utility model.

[0035] Figure 7 A schematic diagram of the overall structure of the fixing frame of this utility model is shown.

[0036] Figure 8A partial top view of the present invention is shown.

[0037] Figure 9 Partial two top views of this utility model are shown.

[0038] Figure 10 A schematic diagram of the overall structure of the operating components of this utility model is shown.

[0039] Figure 11 A schematic diagram of the overall structure of the transmission component of this utility model is shown.

[0040] Figure 12 A schematic diagram of the overall structure of the support rod of this utility model is shown.

[0041] Figure 13 A partial structural schematic diagram of the present invention is shown.

[0042] Figure 14 A schematic diagram of the maintenance platform structure of this utility model is shown.

[0043] Figure 15 An enlarged structural schematic diagram of part A of this utility model is shown. Detailed Implementation

[0044] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0045] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0046] Reference Figures 1-15 This embodiment provides an extension ladder, which includes,

[0047] Adjustment base 1, the adjustment base 1 includes a base 11, an adjustment component 12 disposed on the top of the base 11, and a connecting bracket 13 adapted to and installed with the adjustment component 12;

[0048] The telescopic ladder 2 includes a fixed frame 21, an adjusting frame 22 slidably connected to the fixed frame 21, an operating component 23 disposed at the bottom of the fixed frame 21, a transmission component 24 disposed at one end of the fixed frame 21 near the adjusting frame 22, and a chain 25 for connecting the operating component 23 and the transmission component 24. A railing 26 is fixedly connected to the top of the fixed frame 21 and the adjusting frame 22, and a support rod 27 is disposed at the bottom of the fixed frame 21.

[0049] Pedal 3 is connected to the adjusting bracket 22;

[0050] Specifically, by placing the adjusting seat 1 on the scaffold 4, the connecting frame 13 can be moved by controlling the adjusting component 12, thereby adjusting the position of the telescopic ladder 2. Then, by controlling the operating component 23 and driving the transmission component 24 through the chain 25, the adjusting frame 22 can slide along the fixed frame 21, ultimately connecting the step 3 to the volute. Compared with traditional fixed ladder frames, this equipment can ensure that the equipment adapts to different environments through two sets of different degrees of adjustment. At the same time, it does not need to be disassembled; it can be properly stored after being retracted.

[0051] As one embodiment provided, such as Figures 2 to 11 The adjustment assembly 12 includes a mounting bracket 121 fixedly connected to the top of the base 11, a lead screw 122 mounted on the inner side of the mounting bracket 121 via a bearing, a handwheel 123 fixedly connected to one end of the lead screw 122, and a guide rail 124 fixedly connected to the top of the mounting bracket 121; rotating the handwheel 123 will drive the lead screw 122 to rotate.

[0052] The connecting frame 13 includes a connecting plate 131, a hinge frame 132 fixedly connected to the top of the connecting plate 131, guide wheels 133 provided on both sides of the bottom end of the connecting plate 131, a bottom block 134 fixedly connected to the center of the bottom end of the connecting plate 131, a threaded seat 135 fixedly connected to the center of the bottom end of the bottom block 134, and guide blocks 136 fixedly connected to both sides of the bottom end of the bottom block 134.

[0053] Among them, the fixed frame 21 is hinged to the hinge frame 132, the guide block 136 is slidably connected to the top of the guide rail 124, and the threaded seat 135 is threadedly connected to the lead screw 122.

[0054] Specifically, when the lead screw 122 rotates, under the guidance of the guide block 136 by the guide rail 124, and in conjunction with the connection between the threaded seat 135 and the lead screw 122, the connecting plate 131 is driven to adjust its position, thereby driving the fixed frame 21 connected to the hinge frame 132 to adjust its position; at the same time, the design of the guide wheel 133 can improve the smoothness of the movement of the connecting plate 131.

[0055] A rack 221 is fixedly connected to the center of the bottom end of the adjusting frame 22; when the driven gear 246 rotates, it will drive the rack 221 to move, thereby causing the adjusting frame 22 to slide along the fixed frame 21.

[0056] The operating component 23 includes a first plate 231 fixedly connected to the bottom end of the fixed frame 21, a second plate 232 fixedly connected to the bottom end of the fixed frame 21, a rotating rod 233 mounted and connected to the first plate 231 and the second plate 232 via bearings, a drive sprocket 234 fixedly connected to the outside of the rotating rod 233, and a handle 235 fixedly connected to one end of the rotating rod 233.

[0057] Specifically, turning the handle 235 will cause the rotating rod 233 to rotate, and the rotating rod 233 will cause the drive sprocket 234 to rotate.

[0058] The transmission assembly 24 includes an assembly plate 241 fixedly connected to one end of the fixed frame 21 near the adjusting frame 22, a first transmission rod 242 rotatably connected to the inner side of the assembly plate 241, a second transmission rod 243 rotatably connected to the inner side of the assembly plate 241, a driven sprocket 244 fixedly connected to the outer side of the first transmission rod 242, a driving gear 245 fixedly connected to the outer side of the first transmission rod 242, and a driven gear 246 fixedly connected to the outer side of the second transmission rod 243.

[0059] Among them, the driving sprocket 234 and the driven sprocket 244 are connected by a chain 25, the driving gear 245 meshes with the driven gear 246, and the driven gear 246 meshes with the rack 221;

[0060] Specifically, when the drive sprocket 234 rotates, it will drive the driven sprocket 244 to rotate under the transmission of the chain 25. The driven sprocket 244 drives the drive gear 245 to rotate through the first transmission rod 242, and the drive gear 245 will drive the driven gear 246 to rotate.

[0061] As one embodiment provided, such as Figure 12 The support rod 27 includes an L-plate 271 fixedly connected to the bottom end of the fixed frame 21, an upper rod 272 hinged to the bottom end of the L-plate 271, a screw 273 threadedly connected to the bottom end of the upper rod 272, and a lower rod 274 fixedly connected to the bottom end of the screw 273.

[0062] Specifically, rotating the lower rod 274 will drive the screw 273 to rotate, thereby adjusting the length of the screw 273 at the bottom of the upper rod 272. This allows the height of the support rod 27 to be adjusted according to different terrains, thus providing effective support for the telescopic ladder 2. At the same time, a magnetic lifter 100 is also provided at the bottom of the lower rod 274. By controlling the handle of the magnetic lifter 100, the magnetic lifter 100 can be opened and closed, realizing the magnetic connection and disconnection between the magnetic lifter 100 and the volute, further ensuring the overall stability of the equipment.

[0063] As one embodiment provided, such as Figure 13 The pedal 3 includes a main board 31 hinged to the adjustment frame 22, a guardrail 32 fixedly connected to the top of the main board 31, a side plate 33 hinged to the bottom of the main board 31, and a chain 34 for the guardrail 32 and the top rail 26 of the adjustment frame 22.

[0064] Specifically, after the extension of the adjustment frame 22 is properly adjusted, the main board 31 is rotated to connect the main board 31 with the volute. At this time, the side plate 33 is rotated to extend it, increasing the range of the working platform. In addition, the connection of the chain 34 can protect personnel and also improve the connection strength between the adjustment frame 22 and the pedal 3. Moreover, a suction cup electromagnet 200 is provided at the bottom of the main board 31. By controlling the on and off of the suction cup electromagnet 200, the magnetic connection and disconnection between the suction cup electromagnet 200 and the volute can be realized, further ensuring the overall stability of the equipment.

[0065] In summary, firstly, the base 11 of the adjusting seat 1 is placed on the scaffold 4. The handwheel 123 is turned to drive the lead screw 122 to rotate. Under the guidance of the guide rail 124 on the guide block 136, the threaded seat 135 drives the connecting plate 131 to move horizontally, thereby pushing the fixed frame 21 to adjust its overall position via the hinge frame 132. Then, the handle 235 is turned to drive the rotating rod 233 and the driving sprocket 234 to rotate. Through the chain 25, the driven sprocket 244 drives the first transmission rod 242 to rotate. The rack 221 moves via the meshing of the drive gear 245 and driven gear 246, causing the adjustment frame 22 to extend and retract along the fixed frame 21. Once extended, the main board 31 uses a suction cup electromagnet 200 to attract the volute, unfolding the side plate 33 to expand the working surface. Simultaneously, the chain 34 connects the guardrail 32 and the railing 26 to form double protection. The support rod 27 adjusts the extension length of the screw 273 by rotating the lower rod 274, achieving three-dimensional stable support in conjunction with the magnetic attraction of the magnetic lifter 100. This design not only allows for precise adaptation to different working heights and angles through the combined operation of the handwheel 123 and handle 235, but also ensures stability during high-altitude operations through electromagnetic attraction. Furthermore, the folding footboard 3 and the telescopic ladder 2 facilitate storage while reducing the equipment's storage volume. Compared to traditional fixed ladders, it offers significant advantages such as continuous position adjustment without disassembly and rapid storage.

[0066] As one embodiment provided, such as Figure 1 , Figure 14 and Figure 15 An inspection platform, including an extension ladder, and also including,

[0067] The scaffolding 4 consists of uprights 41, horizontal bars 42 spliced ​​with the uprights 41, diagonal braces 43 spliced ​​with the uprights 41, and diagonal support bars 44 spliced ​​with the uprights 41. A hanging board 45 is laid on the top of the horizontal bar 42, and a hanging ladder 46 is laid on the outside of the horizontal bar 42.

[0068] Specifically, the bottom of the upright 41 is equipped with height-adjustable casters to adapt to the curved space inside the volute, and the hanging ladder 46 allows personnel to go up and down the scaffold 4. The hanging plate 45 is used to support personnel, the adjustment seat 1 and various required equipment.

[0069] It also includes a disc buckle 5 fixedly connected to the outside of the upright 41, a locking hole 51 opened at the top of the disc buckle 5, and a locking rod 52 that engages with the locking hole 51. The disc buckle 5 is used to splice the horizontal bar 42, the diagonal tie rod 43, the diagonal brace 44 and the upright 41. The installation can be completed by aligning one end opening of the horizontal bar 42, the diagonal tie rod 43 and the diagonal brace 44 with the locking hole 51 specified by the disc buckle 5 and inserting the locking rod 52.

[0070] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. An extended ladder rack, characterized in that: include, Adjustment seat (1), the adjustment seat (1) includes a base (11), an adjustment component (12) disposed on the top of the base (11), and a connecting frame (13) adapted to and installed with the adjustment component (12); Telescopic ladder (2), the telescopic ladder (2) includes a fixed frame (21), an adjusting frame (22) slidably connected to the fixed frame (21), an operating component (23) disposed at the bottom end of the fixed frame (21), a transmission component (24) disposed at one end of the fixed frame (21) near the adjusting frame (22), and a chain (25) for connecting the operating component (23) and the transmission component (24). The top ends of the fixed frame (21) and the adjusting frame (22) are fixedly connected with railings (26), and the bottom end of the fixed frame (21) is provided with a support rod (27). The pedal (3) is connected to the adjustment frame (22).

2. The extension ladder frame according to claim 1, characterized in that: The adjustment assembly (12) includes a mounting bracket (121) fixedly connected to the top of the base (11), a lead screw (122) mounted on the inner side of the mounting bracket (121) by a bearing, a handwheel (123) fixedly connected to one end of the lead screw (122), and a guide rail (124) fixedly connected to the top of the mounting bracket (121).

3. The extension ladder frame according to claim 2, characterized in that: The connecting frame (13) includes a connecting plate (131), a hinge frame (132) fixedly connected to the top of the connecting plate (131), guide wheels (133) provided on both sides of the bottom end of the connecting plate (131), a bottom block (134) fixedly connected to the center of the bottom end of the connecting plate (131), a threaded seat (135) fixedly connected to the center of the bottom end of the bottom block (134), and guide blocks (136) fixedly connected to both sides of the bottom end of the bottom block (134). The fixed frame (21) is hinged to the hinge frame (132), the guide block (136) is slidably connected to the top of the guide rail (124), and the threaded seat (135) is threadedly connected to the lead screw (122).

4. The extension ladder frame according to claim 3, characterized in that: A rack (221) is fixedly connected to the center of the bottom end of the adjusting frame (22).

5. The extension ladder frame according to claim 4, characterized in that: The operating component (23) includes a first plate (231) fixedly connected to the bottom end of the fixed frame (21), a second plate (232) fixedly connected to the bottom end of the fixed frame (21), a rotating rod (233) mounted and connected to the first plate (231) and the second plate (232) via the bearing, a drive sprocket (234) fixedly connected to the outside of the rotating rod (233), and a handle (235) fixedly connected to one end of the rotating rod (233).

6. The extension ladder frame according to claim 5, characterized in that: The transmission assembly (24) includes an assembly plate (241) fixedly connected to one end of the fixed frame (21) near the adjusting frame (22), a first transmission rod (242) rotatably connected to the inner side of the assembly plate (241), a second transmission rod (243) rotatably connected to the inner side of the assembly plate (241), a driven sprocket (244) fixedly connected to the outer side of the first transmission rod (242), a driving gear (245) fixedly connected to the outer side of the first transmission rod (242), and a driven gear (246) fixedly connected to the outer side of the second transmission rod (243). The driving sprocket (234) and the driven sprocket (244) are connected by the chain (25), the driving gear (245) meshes with the driven gear (246), and the driven gear (246) meshes with the rack (221).

7. The extension ladder rack according to any one of claims 2 to 6, characterized in that: The support rod (27) includes an L-plate (271) fixedly connected to the bottom end of the fixed frame (21), an upper rod (272) hinged to the bottom end of the L-plate (271), a screw (273) threadedly connected to the bottom end of the upper rod (272), and a lower rod (274) fixedly connected to the bottom end of the screw (273).

8. The extension ladder frame according to claim 7, characterized in that: The pedal (3) includes a main board (31) hinged to the adjustment frame (22), a guardrail (32) fixedly connected to the top of the main board (31), a side plate (33) hinged to the bottom of the main board (31), and a chain (34) for the guardrail (32) and the railing (26) at the top of the adjustment frame (22).

9. A maintenance platform, characterized in that: Including the extended ladder frame as described in any one of claims 1 to 8, further comprising: The scaffold (4) comprises uprights (41), horizontal bars (42) spliced ​​with the uprights (41), diagonal braces (43) spliced ​​with the uprights (41), and diagonal support bars (44) spliced ​​with the uprights (41). A hanging board (45) is laid on the top of the horizontal bar (42), and a hanging ladder (46) is laid on the outside of the horizontal bar (42).

10. The maintenance platform according to claim 9, characterized in that: It also includes a disc buckle (5) fixedly connected to the outside of the upright (41), a locking hole (51) opened at the top of the disc buckle (5), and a locking rod (52) engaged with the locking hole (51). The disc buckle (5) is used for splicing the crossbar (42), the diagonal tie rod (43), the diagonal brace (44), and the upright (41).

Images