Safety ladder stand

Abstract

The invention provides a safety crawling ladder. The safety crawling ladder comprises a crawling ladder main body, a supporting assembly, a hanging assembly and a driving assembly, wherein the supporting assembly is used for supporting the crawling ladder main body; the hanging assembly comprises a safety belt and a limiting guide rod, the limiting guide rod is arranged on at least one side of the ladder stand main body, the safety belt and the limiting guide rod are detachably connected, and a switching end is formed at the connecting position; the driving assembly is in driving connection with the switching end; under the condition that the driving assembly is started, the switching end moves in the extending direction of the limiting guide rod, and under the condition that the driving assembly is closed, the position of the switching end on the limiting guide rod is fixed. By the adoption of the scheme, hanging protection of an operator in the ladder climbing process or the operation process is achieved through the safety belt, and the position of the switching end on the limiting guide rod is adjusted in combination with the driving assembly; therefore, the safety belt can be timely adjusted to the height most adaptive to the height of the operating personnel even if the operating personnel are not separated from the crawling ladder, so that instant protection is provided, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of safety ladders, and in particular to a safety ladder. Background Art

[0002] In high-altitude operations and some short-term low-altitude operations such as repairing wires and installing equipment, it is often necessary to work on a safety ladder.

[0003] However, with traditional safety ladders, workers generally do not have safety structures such as safety belts to protect them when climbing up, climbing down, and working. This makes it easy for workers to fall during the climbing or working process, and the safety of the working environment for workers is poor. Summary of the invention

[0004] The invention provides a safety ladder to solve the problem that the safety ladder in the prior art has no safety structure to protect workers.

[0005] In order to solve the above problems, the present invention provides a safety ladder, comprising: a ladder body; a supporting assembly, which is arranged on the ladder body to support the ladder body; a hanging assembly, which comprises a safety belt and a limiting guide rod, wherein the limiting guide rod is arranged on at least one side of the ladder body parallel to the extension direction of the ladder body, and the two ends of the limiting guide rod extend to the two ends of the ladder body respectively, and the safety belt is detachably connected to the limiting guide rod and forms a transfer end at the connection position; a driving assembly, which is drivingly connected to the transfer end to adjust the position of the safety belt in the vertical direction; wherein, when the driving assembly is started, the transfer end moves along the extension direction of the limiting guide rod, and when the driving assembly is turned off, the position of the transfer end on the limiting guide rod is fixed.

[0006] Furthermore, the hanging assembly also includes a lifting block and a fixing ring arranged on the lifting block, the lifting block can be slidably arranged on the limiting guide rod, the safety belt includes a belt body and a buckle connected to the belt body through a connecting rope, the buckle and / or the fixing ring can be opened and closed to buckle the buckle and the fixing ring to form a transfer end.

[0007] Furthermore, the buckle includes a notch ring, an elastic member and an arc rod, the extended shape of the arc rod is adapted to the notch ring, the notch ring has an arc groove extending along its circumference, one end of the arc groove extends to one end of the notch ring, the elastic member is arranged in the arc groove, one end of the arc rod extends into the arc groove and abuts against the elastic member, and the other end of the arc rod cooperates with the other end stop of the notch ring.

[0008] Furthermore, the buckle also includes a pull rod, which is arranged on the outer periphery of one end of the arc-shaped rod away from the arc-shaped groove, and the pull rod cooperates with the end stop of the notch ring with the arc-shaped groove opening.

[0009] Furthermore, the hanging assembly also includes a fixing assembly. Fixing assemblies are provided on the upper and lower sides of one side of the ladder main body on which a limiting guide rod is provided. The limiting guide rod is rotatably mounted on one side of the ladder main body through two fixing assemblies. The limiting guide rod has an external thread, and the lifting block has a threaded hole. The limiting guide rod passes through the threaded hole and cooperates with the lifting block thread. The lifting block cooperates with the outer periphery of the ladder main body, and the driving assembly is drivingly connected to the limiting guide rod.

[0010] Furthermore, a base box is provided at the bottom of the ladder body, and the driving assembly includes a driving motor arranged in the base box and a transmission assembly at least partially arranged in the base box. The bottom end of the limiting guide rod extends to one side of the base box, and the driving assembly is connected to the limiting guide rod through the transmission assembly to drive the lifting block to rise and fall on the limiting guide rod through the forward or reverse rotation of the driving motor.

[0011] Furthermore, the transmission assembly includes a first bevel gear, a second bevel gear, a rotating rod, a third bevel gear and a fourth bevel gear. The first bevel gear, the second bevel gear and part of the rotating rod are located in the base box. The driving motor is connected to the first bevel gear, the first bevel gear is meshed with the second bevel gear, the second bevel gear is connected to the third bevel gear through the rotating rod and rotates synchronously, and the fourth bevel gear is arranged at the bottom end of the limiting guide rod and meshes with the third bevel gear.

[0012] Furthermore, there are two limit guide rods, which are respectively arranged on opposite sides of the ladder body. The safety belt and the limit guide rods are detachably connected to form two transfer ends, and the driving component drives the two transfer ends to move synchronously.

[0013] Further, the support assembly includes a hanging structure arranged at the top of the ladder body, and the hanging structure is used to hang the top of the ladder body at a desired position; and / or, the support assembly includes a main supporting structure arranged at the bottom of the ladder body, and the ladder body is arranged on a mounting surface where the ladder body is to be installed through the main supporting structure, and the position of the main supporting structure on the mounting surface where the ladder body is to be installed is fixed; and / or, the support assembly includes an auxiliary supporting structure arranged on the ladder body, and the auxiliary supporting structure is detachably and / or retractably arranged on the ladder body to form a supporting structure for supporting the ladder body.

[0014] Furthermore, the safety ladder also includes a control module, which includes a monitoring terminal and a pressure sensor, a controller and a wireless transmission module arranged on the safety belt. The controller is electrically connected to the pressure sensor and the wireless transmission module. The controller is radio-connected to the monitoring terminal via the wireless transmission module. The pressure sensor is used to sense the pressure on the safety belt.

[0015] By applying the technical solution of the present invention, a safety ladder is provided, comprising a ladder body, a supporting assembly, a hanging assembly and a driving assembly: the supporting assembly is arranged on the ladder body to support the ladder body; the hanging assembly comprises a safety belt and a limiting guide rod, the limiting guide rod is arranged on at least one side of the ladder body parallel to the extension direction of the ladder body, the two ends of the limiting guide rod respectively extend to the two ends of the ladder body, the safety belt is detachably connected to the limiting guide rod and a transfer end is formed at the connection position; the driving assembly is drivingly connected to the transfer end to adjust the position of the safety belt in the vertical direction; wherein, when the driving assembly is started, the transfer end moves along the extension direction of the limiting guide rod, and when the driving assembly is turned off, the position of the transfer end on the limiting guide rod is fixed.

[0016] By adopting this solution, the support component can be used to provide stable support for the ladder body, thus preventing the ladder body from shaking when the operator is climbing the ladder or working, resulting in unsafe working conditions; the safety belt can be used to protect the operator while climbing or working on the ladder body, thus preventing the operator from falling from the ladder body and other safety issues, thereby improving the operator's sense of security and reducing the risk of falling during high-altitude operations; and the drive component can be used to adjust the position of the adapter end on the limit guide rod, so that the operator can adjust the safety belt to the height that best suits the operator's height in time even without leaving the ladder, thereby providing immediate protection, reducing safety hazards, and further improving and ensuring the protective effect of the safety belt on the operator, especially in scenarios where long-term operations are required or the operating height changes frequently, thereby greatly improving the comfort and efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of a safety ladder provided by an embodiment of the present invention is shown;

[0019] Figure 2 Shows Figure 1 A front view of

[0020] Figure 3 Shows Figure 2 A magnified view of position A in the middle;

[0021] Figure 4 Shows Figure 1 Schematic diagram of the structure of the buckle in the safety ladder.

[0022] The above drawings include the following reference numerals:

[0023] 10. Ladder body;

[0024] 30. Hanging assembly; 31. Safety belt; 311. Belt body; 312. Connecting rope; 313. Buckle; 3131. Notch ring; 3132. Elastic member; 3133. Arc rod; 3134. Pull rod; 3135. Arc groove; 32. Limit guide rod; 33. Lifting block; 34. Fixing ring; 35. Fixing assembly;

[0025] 40. driving assembly; 41. driving motor; 42. transmission assembly; 421. first bevel gear; 422. second bevel gear; 423. rotating rod; 424. third bevel gear; 425. fourth bevel gear;

[0026] 50. Base box; 51. Motor cover. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 4 As shown, an embodiment of the present invention provides a safety ladder, including a ladder body 10, a support assembly, a hanging assembly 30 and a driving assembly 40: the support assembly is arranged on the ladder body 10 to support the ladder body 10; the hanging assembly 30 includes a safety belt 31 and a limiting guide rod 32, the limiting guide rod 32 is arranged on at least one side of the ladder body 10 parallel to the extension direction of the ladder body 10, and the two ends of the limiting guide rod 32 extend to the two ends of the ladder body 10 respectively, the safety belt 31 is detachably connected to the limiting guide rod 32 and forms a transfer end at the connection position; the driving assembly 40 is drivingly connected to the transfer end to adjust the position of the safety belt 31 in the vertical direction; wherein, when the driving assembly 40 is started, the transfer end moves along the extension direction of the limiting guide rod 32, and when the driving assembly 40 is turned off, the position of the transfer end on the limiting guide rod 32 is fixed.

[0029] In this embodiment, the ladder body 10 is stably supported by the support assembly to prevent the ladder body 10 from shaking when the operator is climbing the ladder or working, resulting in unsafe operation. The safety belt 31 is used to protect the operator while climbing or working on the ladder body 10, avoiding safety problems such as the operator falling from the ladder body 10, thereby improving the operator's sense of security and reducing the risk of falling during high-altitude operations. Moreover, the drive assembly 40 adjusts the position of the adapter end on the limit guide rod 32, so that the operator can adjust the safety belt 31 to the height that best matches the operator's height in time even without leaving the ladder, thereby providing immediate protection, reducing safety hazards, and further improving and ensuring the protection effect of the safety belt 31 on the operator, especially in scenarios where long-term operations or frequent changes in operating heights are required, greatly improving the comfort and efficiency of the operation.

[0030] like Figure 1 As shown, the hanging assembly 30 also includes a lifting block 33 and a fixing ring 34 arranged on the lifting block 33. The lifting block 33 is slidably arranged on the limiting guide rod 32. The safety belt 31 includes a belt body 311 and a buckle 313 connected to the belt body 311 through a connecting rope 312. The buckle 313 and / or the fixing ring 34 can be opened and closed to buckle the buckle 313 and the fixing ring 34 to form a transfer end. This arrangement makes it more convenient to adjust and disassemble the safety belt 31. At the same time, the lifting block 33 ensures the stability of the lifting on the limiting guide rod 32, which is suitable for working environments where the height of the safety belt 31 needs to be frequently adjusted.

[0031] like Figure 4 As shown, the retaining ring 313 includes a notch ring 3131, an elastic member 3132 and an arc rod 3133. The extended shape of the arc rod 3133 is adapted to the notch ring 3131. The notch ring 3131 has an arc groove 3135 extending along its circumference. One end of the arc groove 3135 extends to one end of the notch ring 3131. The elastic member 3132 is arranged in the arc groove 3135. One end of the arc rod 3133 extends into the arc groove 3135 and abuts against the elastic member 3132. The other end of the arc rod 3133 cooperates with the other end stop of the notch ring 3131.

[0032] In this embodiment, the operator can first wear the belt body 311 and then fasten the buckle ring 313 and the fixing ring 34, or can first fasten the buckle ring 313 and the fixing ring 34 and then wear the belt body 311. Taking the former as an example, after the operator wears the belt body 311, the operator presses the arc rod 3133 into the arc groove 3135 and opens the gap of the notch ring 3131, passes the gap through the fixing ring 34 and then releases the arc rod 3133. The arc rod 3133 rebounds under the action of the elastic member 3132 and re-blocks the gap of the notch ring 3131, thereby achieving the fastening of the buckle ring 313 and the fixing ring 34. This arrangement simplifies the buckling steps and increases the operating speed, and improves the convenience of buckling and disassembling the buckle 313 and the fixing ring 34, making it easier for operators to disassemble, replace, repair, and transfer the safety belt 31 according to actual conditions. At the same time, the elastic force of the elastic member 3132 on the arc rod 3133 can ensure that the buckle 313 can remain connected to the fixing ring 34 even when subjected to a strong impact, which can effectively prevent the safety belt 31 from falling off and ensure the safety of operators.

[0033] It is understandable that if Figure 4 As shown, the elastic member 3132 is a spring; the notch of the notch ring 3131 is an arc opening formed by cutting off one quarter of a circular ring structure as a whole; the extension length of the arc groove 3135 is one third of the notch ring 3131, and the end of the arc groove 3135 away from the notch and the end of the notch away from the arc groove 3135 are located on the same radial plane; the shape of the arc rod 3133 is adapted to the notch ring 3131 and its extension length is greater than the extension length of the notch in the circumferential direction of the notch ring 3131. When it blocks the notch, one end of it abuts against the end face of the notch away from the arc groove 3135, and the other end is located in the opening of the arc groove 3135 to avoid falling out, thereby ensuring the reliability of the buckle 313.

[0034] Specifically, the buckle 313 further includes a pull rod 3134 , which is disposed on the outer periphery of one end of the arc-shaped rod 3133 away from the arc-shaped groove 3135 , and the pull rod 3134 cooperates with the end stop of the notch ring 3131 having the opening of the arc-shaped groove 3135 .

[0035] In this way, the pull rod 3134 facilitates the operator to adjust the arc rod 3133, making it more convenient to open the buckle 313. At the same time, the pull rod 3134 cooperates with the stopper at the end of the notch ring 3131 to limit the depth of the arc rod 3133 extending into the arc groove 3135, avoiding the situation where the elastic force of the elastic member 3132 is reduced due to frequent over-compression, thereby preventing the arc rod 3133 from being completely reset, thereby ensuring the reliability and service life of the buckle 313.

[0036] It is understandable that the design position and shape of the pull rod 3134 can be adjusted according to actual conditions, and examples are not given here one by one.

[0037] like Figure 1 and Figure 2 As shown, the hanging assembly 30 also includes a fixing assembly 35. The fixing assemblies 35 are provided on the upper and lower sides of one side of the ladder body 10 on which the limiting guide rod 32 is provided. The limiting guide rod 32 is rotatably mounted on one side of the ladder body 10 through two fixing assemblies 35. The limiting guide rod 32 has an external thread, and the lifting block 33 has a threaded hole. The limiting guide rod 32 passes through the threaded hole and is threadedly matched with the lifting block 33. The lifting block 33 is limitedly matched with the outer periphery of the ladder body 10, and the driving assembly 40 is drivingly connected to the limiting guide rod 32.

[0038] In this embodiment, the fixing assembly 35 includes a fixing plate and a rotating bearing arranged in the fixing plate. The fixing plate is fixedly arranged on the outer periphery of the limiting guide rod 32 and a rotating bearing is rotatably arranged inside the fixing plate. The limiting guide rod 32 is rotatably passed through the fixing plate through the rotating bearing. It can be understood that at least one fixing plate has a limiting structure between the inside and the limiting guide rod 32 passed through it, so as to limit the lifting and lowering of the limiting guide rod 32 in the fixing plate without limiting the rotation of the limiting guide rod 32 in the fixing plate, thereby avoiding the situation where the limiting guide rod 32 will fall off from the fixing assembly 35, and ensuring the reliability of the rotating installation of the limiting guide rod 32. On the other hand, the lifting block 33 is limitedly cooperated with the outer periphery of the ladder body 10, so that it cannot rotate with the rotation of the limit guide rod 32, thereby ensuring the reliability of the threaded drive of the lifting block 33. The driving assembly 40 drives the limit guide rod 32 to rotate and realizes the lifting and lowering movement of the lifting block 33 on the limit guide rod 32 through threaded cooperation, which is beneficial to ensure the stability of lifting and the accuracy of height adjustment of the safety belt 31, so that the operator can accurately adjust the position of the safety belt, thereby ensuring the safety of high-altitude ladder operations.

[0039] It can be understood that the distance between the upper and lower fixing components 35 on the same side is greater than or equal to the maximum climbable height of the ladder body 10 (i.e., the distance between the lowest position and the highest position of the operator during the ladder climbing process), so as to ensure that the moving height of the lifting block 33 on the limiting guide rod 32 can meet the maximum climbable height of the operator on the ladder body 10, and the external thread of the limiting guide rod 32 is at least distributed on the outer periphery of the limiting guide rod 32 between the upper and lower fixing components 35, so as to ensure the reliability and stability of the thread adjustment of the lifting block 33. Preferably, the external thread in this embodiment covers the outer periphery of the limiting guide rod 32.

[0040] like Figures 1 to 3As shown, a base box 50 is provided at the bottom of the ladder body 10, and a driving assembly 40 includes a driving motor 41 disposed in the base box 50 and a transmission assembly 42 at least partially disposed in the base box 50. The bottom end of the limiting guide rod 32 extends to one side of the base box 50, and the driving assembly 40 is connected to the limiting guide rod 32 through the transmission assembly 42 to drive the lifting block 33 to rise and fall on the limiting guide rod 32 through the forward or reverse rotation of the driving motor 41.

[0041] In this way, the base box 50 not only provides protection for the drive motor 41 and at least part of the transmission assembly 42, avoiding damage to the drive assembly 40 due to harsh environment or accidental collision, but also improves the stability of the ladder body 10 under different ground conditions, making the bottom of the ladder more stable, so as to improve the applicability to working environments with different ground conditions. On the other hand, the lifting and lowering drive of the lifting block 33 can be achieved by the forward or reverse rotation of the drive motor 41, and the drive is convenient and reliable.

[0042] Preferably, a detachable motor cover 51 is provided on the top of the base box 50 , and the drive motor 41 can be disposed on the motor cover 51 , and then the motor cover 51 is installed on the base box 50 to complete the protective installation of the drive motor 41 .

[0043] like Figure 3 As shown, the transmission assembly 42 includes a first bevel gear 421, a second bevel gear 422, a rotating rod 423, a third bevel gear 424 and a fourth bevel gear 425. The first bevel gear 421, the second bevel gear 422 and part of the rotating rod 423 are located in the base box 50. The drive motor 41 is connected to the first bevel gear 421 for driving, the first bevel gear 421 is meshed with the second bevel gear 422, the second bevel gear 422 is connected to the third bevel gear 424 through the rotating rod 423 and rotates synchronously, and the fourth bevel gear 425 is arranged at the bottom end of the limiting guide rod 32 and meshes with the third bevel gear 424.

[0044] In this embodiment, the top of the limiting guide rod 32 is rotatably inserted into the upper fixing assembly 35, the bottom of the limiting guide rod 32 is rotatably inserted into the lower fixing assembly 35 and extends to one side of the base box 50, the fourth bevel gear 425 is fixedly arranged at the bottom of the limiting guide rod 32, the axis of the fourth bevel gear 425, the axis of the limiting guide rod 32, the axis of the output shaft of the driving motor 41, and the axis of the first bevel gear 421 are parallel to each other, the axis of the second bevel gear 422, the rotating rod 423, and the third bevel gear 424 are parallel to each other, the fourth bevel gear 425 is vertically meshed with the third bevel gear 424, and the first bevel gear 421 is vertically meshed with the second bevel gear 422. This arrangement enables the torque of the driving motor 41 to be effectively transmitted to the limiting guide rod 32 and drive the lifting block 33 to rise and fall, ensuring the effective transmission of power, and ensuring the smooth lifting and falling of the safety belt 31 even when adjusting a heavier safety belt 31 or in an environment with greater friction. On the other hand, such a configuration is also convenient for designing a bevel gear set according to actual conditions to control the rotation speed of the limit guide rod 32 within the required range, thereby avoiding the situation where the driving motor 41 drives the limit guide rod 32 to rotate at a too fast speed, causing the lifting block 33 to lift too fast and cause safety hazards such as dragging on the operator wearing the safety belt 31.

[0045] like Figures 1 to 4 As shown, there are two limit guide rods 32, and the two limit guide rods 32 are respectively arranged on opposite sides of the ladder body 10. The safety belt 31 and the limit guide rods 32 are detachably connected to form two transfer ends, and the drive assembly 40 drives the two transfer ends to move synchronously. In this way, the lifting and lowering guidance of the safety belt 31 is realized by the two limit guide rods 32, and the stability of the installation of the safety belt 31 is improved. The synchronous lifting and lowering adjustment of the two lifting blocks 33 on the two limit guide rods 32 can be realized by a drive motor 41, which improves the stability of the adjustment of the safety belt 31. It can be understood that the two limit guide rods 32 are symmetrically distributed on both sides of the ladder body 10, and the fixing assembly 35, the transmission assembly 42, the lifting block 33, and the fixing ring 34 are also provided with two groups and symmetrically arranged on both sides of the ladder body 10.

[0046] Preferably, the support assembly includes a hanging structure arranged at the top of the ladder body 10, and the hanging structure is used to hang the top of the ladder body 10 at a desired position; and / or, the support assembly includes a main supporting structure arranged at the bottom of the ladder body 10, and the ladder body 10 is arranged on the installation surface where the ladder body 10 is required to be installed through the main supporting structure, and the position of the main supporting structure on the installation surface where the ladder body 10 is required to be installed is fixed; and / or, the support assembly includes an auxiliary supporting structure arranged on the ladder body 10, and the auxiliary supporting structure is detachably and / or retractably arranged on the ladder body 10 to form a main supporting structure for supporting the ladder body 10.

[0047] In this embodiment, the support assembly can be used to provide stable support for the ladder body 10, thereby preventing the ladder body 10 from shaking when the operator is climbing the ladder or working, which may lead to unsafe operation. The operator can select the composition of the support assembly according to the actual application situation, so that the ladder can adapt to various working environments, enhance its stability and practicality, and be suitable for working environments with different heights and different ground conditions. Preferably, the support assembly includes a hanging structure, a main support structure and, in this way, the diversified design of the support assembly enables the ladder body 10 to flexibly cope with a variety of complex working scenarios, whether it is necessary to hang the ladder body 10 at a high place for operation, or to find a stable support point on an uneven ground through the main support structure and the auxiliary support structure, etc., a suitable solution can be found, which greatly improves the scope of application and working efficiency of the ladder.

[0048] Among them, the safety ladder also includes a control module, which includes a monitoring terminal and a pressure sensor, a controller and a wireless transmission module arranged on the safety belt 31. The controller is electrically connected to the pressure sensor and the wireless transmission module. The controller is radio-connected to the monitoring terminal through the wireless transmission module. The pressure sensor is used to sense the pressure on the safety belt 31.

[0049] In this embodiment, after the user wears the safety belt 31, the pressure sensor can detect the corresponding pressure signal. At this time, the controller can send the pressure signal to the monitoring terminal through the wireless transmission module, which is convenient for remote monitoring of whether the operator wears the safety belt 31 or monitors whether the operator has abnormal pressure such as falling. This arrangement enables the safety ladder to monitor the safety status of the operator in real time. When the pressure on the safety belt 31 is abnormal, it can send early warning information to the monitoring terminal in time, effectively improving the safety of the operation. Specifically, once abnormal pressure is detected, such as a sudden drop due to gravity or an unexpected action of the operator, the monitoring terminal will immediately issue an early warning to remind the operator and on-site management personnel to take necessary safety measures to avoid potential risks of high-altitude operations and ensure the life safety of the operator.

[0050] Preferably, the controller can also control the start and stop of the drive motor 41 through the wireless transmission module, so that the operator can control the lifting and lowering of the lifting block 33 according to the ladder and working conditions, that is, the operator adjusts the lifting and lowering of the lifting block 33 through the controller in real time as the operator adjusts his position on the ladder body 10 to ensure the protection effect. At the same time, the controller can also have an emergency stop function. It can be understood that after the pressure sensor detects abnormal pressure for a certain period of time, it will control (directly or indirectly) the drive motor 41 to shut down, so as to avoid dragging the operator up and down and other safety hazards.

[0051] Among them, in an embodiment not shown in the figure, the controller can control the start and stop of the drive motor 41 and adjust the speed of the drive motor 41. In this embodiment, the controller includes a display screen and an up button, a down button, an acceleration button, a deceleration button and a start-stop button. The display screen can display the forward, reverse and real-time speed of the drive motor 41. Taking the forward up and reverse down as an example, the operator presses the up button when climbing up the ladder to put the drive motor 41 in the forward state. At this time, the forward light is on and the reverse light is off in the display screen. Then the operator presses the start-stop button for a long time to start the drive motor 41 until the lifting block 33 moves to the desired position and then lets go, and the drive motor 41 stops. When the operator climbs down the ladder, the down button is pressed to put the drive motor 41 in the reverse state. At this time, the forward light is off and the reverse light is on in the display screen. Then the operator presses the start-stop button for a long time to start the drive motor 41 until the lifting block 33 moves to the desired position and then lets go, and the drive motor 41 stops. During the process of climbing the ladder (upward and downward), the speed of the drive motor 41 can also be adjusted in real time through the acceleration button and the deceleration button to adjust the lifting speed of the lifting block 33.

[0052] Or, in another embodiment not shown in the figure, the controller can control the start and stop of the drive motor 41 and adjust the speed of the drive motor 41. The difference from the above embodiment is that in this embodiment, the controller includes a display screen and an up button, a down button, an acceleration button, and a deceleration button. When the operator climbs up the ladder, the up button is pressed to make the drive motor 41 rotate forward and make the lifting block 33 and the safety belt 31 rise at a uniform speed as a whole, until the top of the lifting block 33 abuts against the upper fixing component 35, and the drive motor 41 stops rotating; similarly, when the operator climbs up the ladder, the up button is pressed to make the drive motor 41 reverse and make the lifting block 33 and the safety belt 31 descend at a uniform speed as a whole, until the top of the lifting block 33 abuts against the lower fixing component 35, and the drive motor 41 stops rotating. During the process of climbing the ladder (upward or downward), the speed of the drive motor 41 can also be adjusted in real time through the acceleration button and the deceleration button to adjust the lifting speed of the lifting block 33.

[0053] The start and stop and speed adjustment of the driving motor 41 and the lifting and lowering control of the lifting block 33 are not limited to the above-mentioned embodiments, and are not listed one by one here.

[0054] In summary, the present invention provides a safe ladder. The operator wears the safety belt 31 and buckles the two buckles 313 of the safety belt 31 on the fixed rings 34 on both sides of the ladder body 10 respectively. When the operator climbs up, the drive motor 41 can be controlled to drive the two lifting blocks 33 to move upward synchronously at a uniform speed, so that the two fixed rings 34 and the safety belt 31 as a whole can rise with the operator to ensure the safety of the operator when working at a high place of the ladder body 10; conversely, when the operator moves downward, the drive motor 41 can be controlled to drive the two lifting blocks 33 to move downward at a uniform speed, so that the two fixed rings 34 descend with the operator. Even if the operator accidentally falls on the ladder body 10, the two fixed rings 34 can pull the operator through the buckles 313, the connecting rope 312, and the belt body 311, thereby avoiding safety risks such as accidental falls.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0057] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0058] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0059] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A safety ladder, characterized in that: include: Ladder body (10); A support assembly, arranged on the ladder body (10) to support the ladder body (10); A hanging assembly (30) comprises a safety belt (31) and a limiting guide rod (32), wherein the limiting guide rod (32) is arranged on at least one side of the ladder body (10) in parallel with the extension direction of the ladder body (10), and two ends of the limiting guide rod (32) respectively extend to two ends of the ladder body (10), and the safety belt (31) and the limiting guide rod (32) are detachably connected and form a transfer end at the connection position; A driving assembly (40) is drivingly connected to the adapter end to adjust the position of the safety belt (31) in the vertical direction; wherein, when the driving assembly (40) is started, the adapter end moves along the extension direction of the limiting guide rod (32), and when the driving assembly (40) is turned off, the position of the adapter end on the limiting guide rod (32) is fixed.

2. The safety ladder according to claim 1, characterized in that: The hanging assembly (30) further comprises a lifting block (33) and a fixing ring (34) arranged on the lifting block (33); the lifting block (33) can be slidably arranged on the limiting guide rod (32); the safety belt (31) comprises a belt body (311) and a buckle (313) connected to the belt body (311) via a connecting rope (312); the buckle (313) and / or the fixing ring (34) can be opened and closed to buckle the buckle (313) and the fixing ring (34) to form the transfer end.

3. The safety ladder according to claim 2, characterized in that: The buckle ring (313) comprises a notch ring (3131), an elastic member (3132) and an arc-shaped rod (3133); the extended shape of the arc-shaped rod (3133) is adapted to the notch ring (3131); the notch ring (3131) has an arc-shaped groove (3135) extending along its circumference; one end of the arc-shaped groove (3135) extends to one end of the notch ring (3131); the elastic member (3132) is arranged in the arc-shaped groove (3135); one end of the arc-shaped rod (3133) extends into the arc-shaped groove (3135) and abuts against the elastic member (3132); the other end of the arc-shaped rod (3133) cooperates with the other end stopper of the notch ring (3131).

4. The safety ladder according to claim 3, characterized in that: The buckle (313) also includes a pull rod (3134), which is arranged on the outer periphery of one end of the arc rod (3133) away from the arc groove (3135), and the pull rod (3134) cooperates with the end stop of the notch ring (3131) having the opening of the arc groove (3135).

5. The safety ladder according to claim 2, characterized in that: The hanging assembly (30) also includes a fixing assembly (35). The fixing assemblies (35) are provided on both upper and lower sides of one side of the ladder body (10) on which the limiting guide rod (32) is provided. The limiting guide rod (32) is rotatably mounted on one side of the ladder body (10) through the two fixing assemblies (35). The limiting guide rod (32) has an external thread. The lifting block (33) has a threaded hole. The limiting guide rod (32) passes through the threaded hole and is threadedly matched with the lifting block (33). The lifting block (33) is limitedly matched with the outer periphery of the ladder body (10). The driving assembly (40) is drivingly connected to the limiting guide rod (32).

6. The safety ladder according to claim 2, characterized in that: The bottom of the ladder body (10) is provided with a base box (50), the driving assembly (40) comprises a driving motor (41) arranged in the base box (50) and a transmission assembly (42) at least partially arranged in the base box (50), the bottom end of the limiting guide rod (32) extends to one side of the base box (50), and the driving assembly (40) is connected to the limiting guide rod (32) through the transmission assembly (42) so as to drive the lifting block (33) on the limiting guide rod (32) to rise and fall through the forward or reverse rotation of the driving motor (41).

7. The safety ladder according to claim 6, characterized in that: The transmission assembly (42) comprises a first bevel gear (421), a second bevel gear (422), a rotating rod (423), a third bevel gear (424) and a fourth bevel gear (425); the first bevel gear (421), the second bevel gear (422) and a part of the rotating rod (423) are located in the base box (50); the driving motor (41) is drivingly connected to the first bevel gear (421); the first bevel gear (421) is meshed with the second bevel gear (422); the second bevel gear (422) is connected to the third bevel gear (424) through the rotating rod (423) and rotates synchronously; the fourth bevel gear (425) is arranged at the bottom end of the limiting guide rod (32) and is meshed with the third bevel gear (424).

8. The safety ladder according to claim 1, characterized in that: There are two limit guide rods (32), which are respectively arranged on opposite sides of the ladder body (10); the safety belt (31) and the limit guide rod (32) are detachably connected to form two transfer ends; and the driving assembly (40) drives the two transfer ends to move synchronously.

9. The safety ladder according to claim 1, characterized in that: The support assembly comprises a hanging structure arranged on the top of the ladder body (10), and the hanging structure is used to hang the top of the ladder body (10) at a desired position; And / or, the support assembly comprises a main support structure arranged at the bottom of the ladder body (10), the ladder body (10) is arranged on a mounting surface where the ladder body (10) is to be installed through the main support structure, and the main support structure is fixed at a position on the mounting surface where the ladder body (10) is to be installed; And / or, the support assembly comprises an auxiliary support structure arranged on the ladder body (10), and the auxiliary support structure is detachably and / or retractably arranged on the ladder body (10) to form a support structure for supporting the ladder body (10).

10. The safety ladder according to claim 1, characterized in that: The safety ladder also includes a control module, which includes a monitoring terminal and a pressure sensor, a controller and a wireless transmission module arranged on the safety belt (31). The controller is electrically connected to the pressure sensor and the wireless transmission module. The controller is wirelessly connected to the monitoring terminal via the wireless transmission module. The pressure sensor is used to sense the pressure on the safety belt (31).

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