Multi-purpose ladder

Abstract

The utility model discloses a multipurpose ladder belongs to the technical field of ladder, and the existing herringbone ladder support seat page is small and can not cooperate with the pole shape frame body and carry out shortening operation interval, cooperate stable support problem, multipurpose ladder includes two ladder frames, and two ladder frames top rotary installation is in sliding seat, and sliding seat includes two articulated U type frame bodies, and U type frame body is installed with the elastic lock key for locking, and the both sides of ladder frame top are slidably installed on the U type frame body through the locking portion, and the U type frame body is installed with the sliding support portion, and the locking portion is used for controlling the relative rotation of ladder frame and U type frame body, sliding, is used for controlling the relative sliding of ladder frame and sliding support portion simultaneously, and the sliding support portion includes a plurality of insert blocks, and the multipurpose ladder proposed in the utility model satisfies the function of the size adjustment of top operation surface, avoids the time -consuming of ladder multiple shift, and can cooperate with the pole shape frame body and carry out the support again, and the support is safe and stable, and the horizontal distance with top operation point is shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of climbing ladders, in particular to a multipurpose climbing ladder. BACKGROUND

[0002] In the process of power construction, climbing ladders are often used for climbing operations, such as cable erection, equipment installation, etc. Climbing ladders are essential for construction operations, especially ladders, which are widely used due to their independence from walls or other lateral supports and high safety and stability.

[0003] The existing ladder mainly consists of two groups of frame bodies and connecting seats. When in use, the two groups of frame bodies are rotated to form support, and personnel can climb according to the operation height, especially the connecting seat at the top, which can also serve as a work platform. However, the following problems are found during use and need to be improved. On the one hand, the work platform at the top is too narrow and small, which cannot meet the function of supporting personnel walking in a small range, resulting in personnel being unable to reach the cable or contact the work surface at the short-distance operation point, thereby requiring secondary adjustment of the ladder position. On the other hand, especially when working on a telegraph pole or other pole-shaped frame, the ladder can only be placed as close as possible to one side of the telegraph pole or pole-shaped frame for auxiliary work, which causes personnel to deviate from the top operation point and may also cause the ladder to overturn.

[0004] Based on the above problems, the present application proposes a multipurpose climbing ladder. SUMMARY

[0005] To solve the above problems in the technical background, the present application aims to provide a multipurpose climbing ladder, which can adjust the support length of the connecting seat according to the use requirements, increase the support operation surface, and can be positioned and supported in cooperation with the telegraph pole or pole-shaped frame, which is convenient for operation and improves the safety and stability of the support. The problems of the existing ladder support seat page being small and being unable to cooperate with the telegraph pole or pole-shaped frame to shorten the operation distance and cooperate with stable support are solved.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0007] The utility climbing ladder comprises two ladder frames, which are telescopic or fixed, and the top ends of the two ladder frames are rotatably installed on a sliding seat, the sliding seat comprises two U-shaped frame bodies, and one end of each U-shaped frame body is hingedly connected, and the other end of one U-shaped frame body is provided with an elastic lock key for locking the two U-shaped frame bodies; the top end of the ladder frame is slidably installed on the U-shaped frame body through a locking part, a sliding support part is installed on the U-shaped frame body, the locking part is used for controlling the relative rotation of the ladder frame and the U-shaped frame body, and the locking part is used for controlling the relative sliding of the ladder frame and the sliding support part; the sliding support parts on both sides are provided with a plurality of insertion blocks that are inserted into each other, and the outer end of each of the plurality of insertion blocks on the same side is provided with an arc-shaped notch, and when the climbing ladder is installed on a telegraph pole or a rod-shaped frame body, the notches formed by the plurality of insertion blocks on both sides are clamped on the two side walls of the telegraph pole or the rod-shaped frame body.

[0008] In the above technical scheme, during use, the four locking parts are first unlocked, the top parts of the two ladder frames are synchronously controlled to slide so that the rotation installation points of the top parts of the ladder frames are symmetrically located on the two U-shaped frame bodies, four controllable supporting points are formed, the supporting surface is increased to adapt to the expansion of the supporting operation surface, then the sliding support parts on the two U-shaped frame bodies are controlled to move towards or away from each other to control the size of the supporting operation platform of the top parts of the ladder frames, and finally, the four locking parts are locked to lock the sliding and rotation of the top parts of the ladder frames and the U-shaped frame bodies, during the locking process, the relative sliding of the ladder frames and the sliding support parts is synchronously controlled, thereby achieving the effect of symmetrical and stable support, and a top supporting platform with adjustable size is provided for the operator, when the rod-shaped frame body is matched, the sliding support parts are first pulled to the two sides so that the plurality of insertion blocks on the two sides are separated, then the two U-shaped frame bodies are controlled to be opened by unlocking the elastic lock key, and the rod-shaped frame body or the telegraph pole is clamped, then the sliding support parts on the two sides are pushed so that the notches formed by the plurality of insertion blocks on the two sides are clamped on the two side walls of the telegraph pole or the rod-shaped frame body, then the two U-shaped frame bodies are closed, and finally, the four locking parts are locked, thereby completing the stable matching and support of the climbing ladder on the telegraph pole or the rod-shaped frame body, facilitating the personnel to go up and down, shortening the horizontal distance from the top operation point, and increasing the safety and stability of the support, and avoiding the occurrence of side leaning.

[0009] In the above technical solution, further, the locking part includes a fixed shaft, the two top ends of the two main frame plates of the ladder frame are symmetrically provided with the locking part outside, the ladder frame further includes a plurality of steps installed between the two main frame plates, the locking part includes a fixed shaft, the fixed shaft is fixedly installed outside the top end of the main frame plate, a locking gear is rotatably installed outside the end of the fixed shaft, a plurality of locking teeth are annularly distributed and installed outside the locking gear, a threaded hole is provided on the outside of the fixed shaft, a threaded rod is installed on the threaded hole, a knob is connected to the outside end of the threaded rod through a connecting shaft, two limiting rings are fixedly installed on the connecting shaft, and a locking disc is rotatably installed between the two limiting rings, and a locking groove is provided inside the locking disc and engaged with the plurality of locking teeth.

[0010] In the above technical solution, further, the U-shaped frame body includes two main seat plates, the two main seat plates are connected through a connecting rod at the middle of one end, the two main seat plates are symmetrically provided with a second sliding groove, the second sliding groove is connected and penetrates a third sliding groove on the inner side surface of the main seat plate at the middle, the second sliding groove is connected and penetrates a fourth sliding groove on the inner side surface of the main seat plate at the middle, the fixed shaft is inserted into the second sliding groove through the third sliding groove, and the locking gear is located in the second sliding groove, the connecting shaft penetrates the fourth sliding groove, and the locking disc is located in the second sliding groove.

[0011] In the above technical solution, further, the knob and the outer side surface of the main frame plate have a certain gap, which is used to push the locking disc and the plurality of locking teeth to engage when the knob is rotated.

[0012] In the above technical solution, further, when the locking disc and the plurality of locking teeth are engaged, the inner side surface of the knob synchronously extrudes the outer side surface of the main seat plate, so that the top end of the ladder frame and the main seat plate are locked.

[0013] In the above technical solution, further, the two main seat plates corresponding to the closed ends of the two U-shaped frame bodies are respectively provided with notches and protrusions, a locking hole is concavely provided in the main seat plate at the top of the notch, and an elastic lock key is installed on the protrusion, the elastic lock key is a combination of a spring and a locking pin, and the locking pin is inserted into the locking hole by the spring.

[0014] In the above technical solution, further, the second sliding groove is connected and penetrates a first sliding groove at the top of the inner side and the outer end of the main seat plate, the two sides of the sliding support part are slidably installed in the first sliding grooves on the two sides, the sliding support part includes a support plate, the support plate is symmetrically provided with side insertion plates outward on the two sides, a plurality of anti-skid teeth are uniformly provided on the bottom surface of each side insertion plate, and the plurality of anti-skid teeth are meshingly installed with the locking gear.

[0015] Further, the support plate has a plurality of insertion blocks arranged on one side, and a merging groove is formed between adjacent insertion blocks, with the inner side end of the merging groove located in the middle of the support plate; the cross section of the insertion block on one side of the support plate is cross-shaped, and the cross section of the insertion block on the other side of the support plate is H-shaped.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] The multipurpose climbing ladder comprises two ladder frames, the ladder frames are telescopic or fixed, the top ends of the two ladder frames are rotatably installed on a sliding seat, the sliding seat comprises two U-shaped frame bodies, and one end of each U-shaped frame body is hingedly connected, and the other end of one of the U-shaped frame bodies is provided with an elastic lock key for locking the two U-shaped frame bodies; the top ends of the ladder frames are slidably installed on the U-shaped frame bodies through locking portions, the U-shaped frame bodies are provided with sliding support portions, the locking portions are used for controlling the relative rotation of the ladder frames and the U-shaped frame bodies, and the locking portions are used for controlling the relative sliding of the ladder frames and the sliding support portions; the sliding support portions on the two sides have a plurality of insertion blocks that are inserted into each other, and the outer side ends of the insertion blocks on the same side are provided with arc-shaped cutouts; when the climbing ladder is installed on a telegraph pole or a rod-shaped frame body, the cutouts formed by the insertion blocks on the two sides are clamped on the two side walls of the telegraph pole or the rod-shaped frame body, respectively.

[0018] In use, first, the four locking portions are unlocked, the top portions of the two ladder frames are synchronously controlled to slide, the rotating installation points of the top portions of the ladder frames are symmetrically located on the two U-shaped frame bodies, four controllable supporting points are formed, the supporting surface is increased to adapt to the expansion of the supporting operation surface, then the size of the supporting operation platform of the top portions of the ladder frames is controlled by controlling the sliding support portions on the two U-shaped frame bodies to move towards each other or in opposite directions, finally, the sliding and rotation of the top portions of the ladder frames and the U-shaped frame bodies are locked by locking the four locking portions, in the locking process, the relative sliding of the ladder frames and the sliding support portions is synchronously controlled, thereby the effect of symmetrical and stable support is achieved, a adjustable top supporting platform is provided for the operator, when the climbing ladder is matched with a rod-shaped frame body, first, the sliding support portions are pulled to the two sides, so that the insertion blocks on the two sides are separated, then the two U-shaped frame bodies are controlled to be opened by unlocking the elastic lock key, and the rod-shaped frame body or the telegraph pole is clamped, then the sliding support portions on the two sides are pushed, so that the cutouts formed by the insertion blocks on the two sides are clamped on the two side walls of the telegraph pole or the rod-shaped frame body, then the two U-shaped frame bodies are closed, finally, the four locking portions are locked, thereby the climbing ladder is stably matched and supported on the telegraph pole or the rod-shaped frame body, personnel can go up and down, the horizontal distance from the top operation point is shortened, and the safety and stability of the support is improved, the side inclination is avoided, and the multipurpose climbing ladder can meet the adjustment of the size of the top operation surface, avoid the time-consuming of the multiple transfer of the climbing ladder, and can be matched with the rod-shaped frame body for support, the safety and stability of the support is greatly improved, and the horizontal distance from the top operation point is shortened. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A perspective view of the multipurpose ladder provided by the embodiment of the present application;

[0020] Figure 2 A perspective view of the enlarged top support working surface of the multipurpose ladder provided by the embodiment of the present application;

[0021] Figure 3 A perspective view of the two side sliding support parts of the multipurpose ladder provided by the embodiment of the present application;

[0022] Figure 4 A perspective view of the two U-shaped frame bodies of the multipurpose ladder provided by the embodiment of the present application;

[0023] Figure 5 A perspective view of the multipurpose ladder installed with a power line pole provided by the embodiment of the present application;

[0024] Figure 6 A perspective view of the two sliding support parts of the multipurpose ladder provided by the embodiment of the present application;

[0025] Figure 7 A perspective view of the sliding support part provided by the embodiment of the present application;

[0026] Figure 8 A perspective view of the locking part provided by the embodiment of the present application;

[0027] Figure 9 A perspective view of the locking disc provided by the embodiment of the present application;

[0028] Figure 10 A perspective view of the sliding seat provided by the embodiment of the present application.

[0029] In the figure: 100, ladder frame; 110, main frame plate; 120, step plate;

[0030] 200, sliding seat; 210, main seat plate; 211, first sliding groove; 212, second sliding groove; 213, third sliding groove; 214, fourth sliding groove; 215, notch; 216, lock hole; 217, protrusion; 220, connecting rod; 230, elastic lock key;

[0031] 300, sliding support part; 310, support plate; 320, side insertion plate; 330, anti-skid tooth; 340, insertion block; 350, merging groove; 360, anti-skid pattern;

[0032] 400, locking part; 410, fixed shaft; 411, threaded hole; 420, locking gear; 430, locking tooth; 440, locking disc; 441, locking groove; 450, knob; 451, connecting shaft; 452, limiting ring; 453, threaded rod. DETAILED DESCRIPTION

[0033] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0034] Example 1

[0035] like Figures 1-10 The sled 200 is a kind of U-shaped frame, and the sled 200 is a kind of U-shaped frame, and the sled 200 is a kind of U-shaped frame. After the top end of the ladder frame 100 and the U-shaped frame are positioned at a fixed point and at an angle, the locking part 400 is controlled to be locked. After locking, the locking part 400 can also lock the relative sliding of the ladder frame 100 and the sliding support part 300, thereby achieving the overall stability of the supported working surface; the sliding support parts 300 on both sides have multiple plug-in blocks 340 that are plugged into each other, and through symmetrical plug-in, on the one hand, they play the role of connecting the sliding support parts 300 on both sides into a whole, and at the same time, they can prevent the plug-in blocks 340 on both sides from sliding back during the force process, and evenly transfer the bearing force to the sliding seat 200, and the outer ends of the multiple plug-in blocks 340 on the same side are provided with arc-shaped cutouts. When installed on a telephone pole or a rod-shaped frame, the cutouts formed by the multiple plug-in blocks 340 on both sides are respectively clamped on the two side walls of the telephone pole or the rod-shaped frame.

[0036] Working principle:

[0037] In use, first unlock the four locking parts 400, control the two ladder frames 100 to slide synchronously, so that the rotating installation points of the top of the ladder frame 100 are symmetrically located on the two U-shaped frame bodies, forming controllable four support points, which is convenient for increasing the support surface to adapt to the expansion of the support operation surface, then control the sliding support parts 300 on the two U-shaped frame bodies to move towards or in the opposite direction to control the size of the support operation platform at the top of the ladder frame, and finally lock the four locking parts 400 to lock the sliding and rotation of the top of the ladder frame 100 and the U-shaped frame body. In the locking process, the relative sliding of the ladder frame 100 and the sliding support part 300 is controlled synchronously, thereby realizing the effect of symmetrical and stable support, and at the same time providing an adjustable top support platform for the operator. When cooperating with the rod-shaped frame body, first pull the sliding support part 300 to the two sides, so that the multiple insertion blocks 340 on the two sides are separated, then control the two U-shaped frame bodies to open by unlocking the elastic lock key 230, clamp on the rod-shaped frame body or the telegraph pole, then push the sliding support part 300 on the two sides to make the cutouts formed by the multiple insertion blocks 340 on the two sides clamped on the two side walls of the telegraph pole or the rod-shaped frame body, then close the two U-shaped frame bodies, and finally lock the four locking parts 400, thereby completing the stable cooperation and support of the ladder on the telegraph pole or the rod-shaped frame body, facilitating personnel to go up and down, shortening the horizontal distance from the top operation point, and increasing the safety and stability of the support, avoiding the occurrence of side leaning. The multipurpose ladder satisfies the function of adjusting the size of the top operation surface, avoids the time-consuming of moving the ladder multiple times, and can also cooperate with the rod-shaped frame body for support, greatly improving the safety and stability of the support, and shortening the horizontal distance from the top operation point.

[0038] As Figure 6 , 8As shown in FIGS. 9, the locking part 400 comprises a fixed shaft 410 installed on the top outer side of the main frame plate 110, the ladder frame 100 comprises two main frame plates 110 and a plurality of steps 120 installed between the two main frame plates 110, the steps 120 are plate-shaped or columnar, the two top ends of the two main frame plates 110 of the ladder frame 100 are symmetrically installed with the locking part 400 outward, the locking part 400 further comprises a locking gear 420 rotatably installed on the outer side end of the fixed shaft 410, a plurality of locking teeth 430 are installed on the outer side of the locking gear 420, the plurality of locking teeth 430 are annularly distributed, the fixed shaft 410 is provided with a threaded hole 411 on the outer side in the axial direction, a threaded rod 453 is installed on the threaded hole 411, the outer side end of the threaded rod 453 is connected with a knob 450 through a connecting shaft 451, and the connecting shaft 451 is fixedly installed with two limiting rings 452, the two limiting rings 452 are rotatably installed with a locking disc 440 therebetween, the inner side of the locking disc 440 is provided with a locking groove 441 matched with the plurality of locking teeth 430, and the sliding of the locking disc 440 is controlled by rotating the knob 450. When sliding inward, the locking groove 441 provided on the inner side of the locking disc 440 is matched and inserted with the locking teeth 430, so as to realize the effect of rotating locking of the locking gear 420 and the fixed shaft 410.

[0039] As shown in FIGS. 9, the locking part 400 comprises a fixed shaft 410 installed on the top outer side of the main frame plate 110, the ladder frame 100 comprises two main frame plates 110 and a plurality of steps 120 installed between the two main frame plates 110, the steps 120 are plate-shaped or columnar, the two top ends of the two main frame plates 110 of the ladder frame 100 are symmetrically installed with the locking part 400 outward, the locking part 400 further comprises a locking gear 420 rotatably installed on the outer side end of the fixed shaft 410, a plurality of locking teeth 430 are installed on the outer side of the locking gear 420, the plurality of locking teeth 430 are annularly distributed, the fixed shaft 410 is provided with a threaded hole 411 on the outer side in the axial direction, a threaded rod 453 is installed on the threaded hole 411, the outer side end of the threaded rod 453 is connected with a knob 450 through a connecting shaft 451, and the connecting shaft 451 is fixedly installed with two limiting rings 452, the two limiting rings 452 are rotatably installed with a locking disc 440 therebetween, the inner side of the locking disc 440 is provided with a locking groove 441 matched with the plurality of locking teeth 430, and the sliding of the locking disc 440 is controlled by rotating the knob 450. When sliding inward, the locking groove 441 provided on the inner side of the locking disc 440 is matched and inserted with the locking teeth 430, so as to realize the effect of rotating locking of the locking gear 420 and the fixed shaft 410. Figure 6 、 8 As shown in FIGS. 9, the locking part 400 comprises a fixed shaft 410 installed on the top outer side of the main frame plate 110, the ladder frame 100 comprises two main frame plates 110 and a plurality of steps 120 installed between the two main frame plates 110, the steps 120 are plate-shaped or columnar, the two top ends of the two main frame plates 110 of the ladder frame 100 are symmetrically installed with the locking part 400 outward, the locking part 400 further comprises a locking gear 420 rotatably installed on the outer side end of the fixed shaft 410, a plurality of locking teeth 430 are installed on the outer side of the locking gear 420, the plurality of locking teeth 430 are annularly distributed, the fixed shaft 410 is provided with a threaded hole 411 on the outer side in the axial direction, a threaded rod 453 is installed on the threaded hole 411, the outer side end of the threaded rod 453 is connected with a knob 450 through a connecting shaft 451, and the connecting shaft 451 is fixedly installed with two limiting rings 452, the two limiting rings 452 are rotatably installed with a locking disc 440 therebetween, the inner side of the locking disc 440 is provided with a locking groove 441 matched with the plurality of locking teeth 430, and the sliding of the locking disc 440 is controlled by rotating the knob 450. When sliding inward, the locking groove 441 provided on the inner side of the locking disc 440 is matched and inserted with the locking teeth 430, so as to realize the effect of rotating locking of the locking gear 420 and the fixed shaft 410.

[0040] As shown in FIGS. 9, the locking part 400 comprises a fixed shaft 410 installed on the top outer side of the main frame plate 110, the ladder frame 100 comprises two main frame plates 110 and a plurality of steps 120 installed between the two main frame plates 110, the steps 120 are plate-shaped or columnar, the two top ends of the two main frame plates 110 of the ladder frame 100 are symmetrically installed with the locking part 400 outward, the locking part 400 further comprises a locking gear 420 rotatably installed on the outer side end of the fixed shaft 410, a plurality of locking teeth 430 are installed on the outer side of the locking gear 420, the plurality of locking teeth 430 are annularly distributed, the fixed shaft 410 is provided with a threaded hole 411 on the outer side in the axial direction, a threaded rod 453 is installed on the threaded hole 411, the outer side end of the threaded rod 453 is connected with a knob 450 through a connecting shaft 451, and the connecting shaft 451 is fixedly installed with two limiting rings 452, the two limiting rings 452 are rotatably installed with a locking disc 440 therebetween, the inner side of the locking disc 440 is provided with a locking groove 441 matched with the plurality of locking teeth 430, and the sliding of the locking disc 440 is controlled by rotating the knob 450. When sliding inward, the locking groove 441 provided on the inner side of the locking disc 440 is matched and inserted with the locking teeth 430, so as to realize the effect of rotating locking of the locking gear 420 and the fixed shaft 410. Figure 6 、 8, 9, the knob 450 and the outer side of the main frame plate 110 exist a certain gap, for the rotation into the travel to push the locking disc 440 and the plurality of locking teeth 430 card; by rotating the knob 450 to advance the locking disc 440 to move inward, the locking disc 440 and the plurality of locking teeth 430 card, the inner side of the knob 450 extrusion the outer side of the main seat plate 210 at the same time, so that the ladder frame 100 top and the main seat plate 210 between the sliding lock, the inner side of the knob 450 can be provided with a friction surface having anti-skid lines, to facilitate the stability when locking.

[0041] As shown in Figure 9 , the two closed ends of the two U-shaped frame bodies are provided with notches 215 and protrusions 217 on the two main seat plates 210, respectively. When closed and installed, the protrusions 217 are rotated into the notches 215. The top of the main seat plate 210 in the notch 215 is concave and provided with a lock hole 216. The protrusion 217 is provided with an elastic lock key 230. The elastic lock key 230 is a combination of a spring and a lock pin. The lock pin is inserted into the lock hole 216 by the spring drive. The two U-shaped frame bodies are rotated and closed at the same time. The lock function is realized by pulling the lock pin in the opposite direction. The operation is convenient and the locking is firm.

[0042] As shown in Figure 6 , 9 , the sliding support part 300 is slidingly installed on the two sides of the first sliding groove 211. The bottom of the first sliding groove 211 is communicated with the top of the second sliding groove 212. The first sliding groove 211 penetrates the inner side and the outer side of the main seat plate 210. The sliding support part 300 includes a support plate 310. The support plate 310 is symmetrically provided with side insertion plates 320 on both sides. The bottom surface of the side insertion plate 320 is uniformly provided with a plurality of anti-skid teeth 330. The plurality of anti-skid teeth 330 is meshed and installed with the locking gear 420. The locking gear 420 is controlled to rotate and lock with the fixed shaft 410. The fixed shaft 410 is simultaneously rotated and locked with the main seat plate 210 by the knob 450. Finally, the sliding locking effect of the support plate 310 is realized.

[0043] As shown in Figure 1 , 6 , 7, the support plate 310 is provided with a plurality of insertion blocks 340 on one side. The adjacent insertion blocks 340 form a merging groove 350. The inner side end of the merging groove 350 is located in the middle of the support plate 310. The cross section of the insertion block 340 on one side of the support plate 310 is cross-shaped. The cross section of the insertion block 340 on the other side of the support plate 310 is H-shaped. By setting the two side insertion blocks 340 to be inserted and matched in shape, on the one hand, the integrality of the connection of the two side support plates 310 after insertion and positioning is realized, the stable support effect is realized, and the gravity can be evenly transmitted to the two U-shaped frame bodies at the bottom. On the other hand, in the process of force, the two side insertion blocks 340 can be extruded to prevent reverse disengagement and sliding. The top surface of the support plate 310 outside the merging groove 350 is uniformly provided with anti-skid lines 360 to increase the anti-skid effect and facilitate personnel to stand stably.

[0044] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and practice described. Accordingly, all such variations and modifications are intended to be included within the scope of the application as defined in the following claims, along with the full scope of equivalents to which such claims are entitled.

Claims

1. A multi-purpose ladder, comprising two ladder frames (100), wherein the ladder frames (100) are telescopic ladder frames or fixed ladder frames, and the top ends of the two ladder frames (100) are rotatably mounted on a sliding seat (200), characterized in that: The sliding seat (200) comprises two U-shaped frames, and one end of the two U-shaped frames is hinged, and the other end of one of the U-shaped frames is equipped with an elastic locking key (230) for locking the two U-shaped frames. Both sides of the top end of the ladder frame (100) are slidably mounted on a U-shaped frame body via locking portions (400), a sliding support portion (300) is mounted on the U-shaped frame body, and the locking portion (400) is used to control the relative rotation and sliding between the top end of the ladder frame (100) and the U-shaped frame body, while the locking portion (400) is used to control the relative sliding between the ladder frame (100) and the sliding support portion (300); The sliding support parts (300) on both sides have a plurality of plug-in blocks (340) that are plugged into each other, and the outer ends of the plurality of plug-in blocks (340) on the same side are provided with arc-shaped cutouts. When mounted on the rod-shaped body, the cutouts formed by the plurality of plug-in blocks (340) on both sides are respectively clamped on the two side walls of the rod-shaped body. The locking portion (400) includes a fixed shaft (410), and the locking portion (400) is symmetrically installed on the top ends of the two main frame plates (110) included in the ladder frame (100) facing outwards. The locking portion (400) includes a fixed shaft (410), and the fixed shaft (410) is fixedly installed on the outside of the top end of the main frame plate (110). A locking gear (420) is rotatably installed on the outer end of the fixed shaft (410), and a plurality of locking teeth (430) are installed on the outer side of the locking gear (420) in an annular shape. ), the fixed shaft (410) is provided with an axially outer threaded hole (411), a threaded rod (453) is installed on the threaded hole (411), the outer end of the threaded rod (453) is connected to the knob (450) via the connecting shaft (451), and two limiting rings (452) are fixedly installed on the connecting shaft (451), a locking disk (440) is rotatably installed between the two limiting rings (452), and a locking groove (441) is provided on the inner side of the locking disk (440) for engaging with a plurality of locking teeth (430); The U-shaped frame includes two main seat plates (210), the middle parts of one end of the two main seat plates (210) are connected by a connecting rod (220), and the two main seat plates (210) are symmetrically provided with second slide grooves (212), the middle parts of the second slide grooves (212) are connected to the third slide grooves (213) passing through the inner side of the main seat plates (210), and the middle parts of the second slide grooves (212) are connected to the fourth slide grooves (214) passing through the inner side of the main seat plates (210), the fixed shaft (410) is inserted into the second slide groove (212) through the third slide groove (213), and the locking gear (420) is located in the second slide groove (212), the connecting shaft (451) passes through the fourth slide groove (214), and the locking disk (440) is located in the second slide groove (212).

2. The multi-purpose ladder according to claim 1, characterized in that: There is a certain gap between the knob (450) and the outer side surface of the main frame plate (110), which is used to push the locking disk (440) to engage with the plurality of locking teeth (430) when screwing in.

3. The multi-purpose ladder according to claim 2, characterized in that: When the locking disc (440) is engaged with the plurality of locking teeth (430), the inner side surface of the knob (450) synchronously presses the outer side surface of the main seat plate (210), so that the top end of the ladder frame (100) and the main seat plate (210) are slidably locked.

4. The multi-purpose ladder according to claim 3, characterized in that: A notch (215) and a protrusion (217) are respectively provided on the two main seat plates (210) corresponding to the closed ends of the two U-shaped frames. A lock hole (216) is provided inwardly on the main seat plate (210) at the top of the notch (215). An elastic lock key (230) is installed on the protrusion (217). The elastic lock key (230) is a combination of a spring and a lock pin, and the lock pin is inserted into the lock hole (216) by driving the spring.

5. The multi-purpose ladder according to claim 4, characterized in that: The top of the second slide groove (212) is connected to the first slide groove (211) that passes through the inner and outer ends of the main seat plate (210), and the two sides of the sliding support part (300) are slidably installed in the first slide grooves (211) on both sides. The sliding support part (300) includes a support plate (310), and the support plate (310) has side plug plates (320) symmetrically protruding on both sides. The bottom surface of the side plug plate (320) is evenly provided with a plurality of anti-slip teeth (330), and the plurality of anti-slip teeth (330) are meshed and installed with the locking gear (420).

6. The multi-purpose ladder according to claim 5, characterized in that: The support plate (310) has a plurality of insert blocks (340) disposed toward one side, and a merging groove (350) is formed between adjacent insert blocks (340). The inner end of the merging groove (350) is located in the middle of the support plate (310). The insert blocks (340) on one support plate (310) have a cross-shaped cross section, while the insert blocks (340) on the other support plate (310) have an I-shaped cross section.

7. The multi-purpose ladder according to claim 6, characterized in that: Anti-slip grooves (360) are evenly provided on the top surface of the support plate (310) outside the merging groove (350).

8. The multi-purpose ladder according to claim 1, characterized in that: The ladder frame (100) further comprises a plurality of pedals (120) installed between two main frame plates (110).

Images