CN211230205U - Movable ladder for ascending a height - Google Patents
Movable ladder for ascending a height Download PDFInfo
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- CN211230205U CN211230205U CN201921729409.1U CN201921729409U CN211230205U CN 211230205 U CN211230205 U CN 211230205U CN 201921729409 U CN201921729409 U CN 201921729409U CN 211230205 U CN211230205 U CN 211230205U
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Abstract
The application provides a portable ladder of ascending a height, including rotatable wheelset, power locking structure and traction mechanism, be equipped with rotatable and automatic re-setting's wheelset on the portable wheelset, tractive and locking control through power locking structure can roll with ground contact, and leave and switch between two states on ground, through traction mechanism can be fine adjust the lower extreme of tractive rope with the connection direction of rotatable wheelset makes the rotation of rotatable wheelset to realize. Through the technical scheme, the ascending ladder can be moved more conveniently and rapidly without cooperation of multiple persons.
Description
Technical Field
The application relates to a ladder field of ascending a height especially relates to a portable ladder of ascending a height.
Background
The climbing ladder is a ladder used in climbing operation, is applied to various fields, is developed in various types, such as a climbing platform, a herringbone ladder and the like, is commonly used, and is made of wood, aluminum alloy, iron, stainless steel, glass fiber and the like, but is manually moved when the ladder needs to be moved, and is very inconvenient to move when the weight of the ladder is heavy and a plurality of persons are required to be moved simultaneously.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned not enough of present portable ladder of ascending a height existence, this application provides a portable ladder of ascending a height, removal ladder that can be convenient.
In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:
the utility model provides a portable ladder of ascending a height, includes the ladder frame, still includes:
the rotatable wheel set comprises a first rotating shaft, a plurality of mounting plates, a roller and a first return spring, the first rotating shaft is arranged on the opposite side surfaces of the lower part of the ascending ladder, is mutually equal in height and parallel, and is rotationally connected with the ladder frame; each mounting plate is arranged in parallel and is fixedly connected with the first rotating shaft, and one end, far away from the first rotating shaft, of each mounting plate is provided with a first connecting seat connected with a traction rope; the roller is arranged on the mounting plate; two ends of the first return spring are respectively rotatably connected with the lower part of the ladder frame and the mounting plate and are both far away from the first rotating shaft;
the power locking mechanism is arranged at the upper part of the ladder frame and is configured to drive the traction ropes to move and lock the positions of the traction ropes after the traction ropes reach a preset stroke;
the traction mechanism comprises the traction rope and a reversing pulley, the lower end of the traction rope is connected with the first connecting seat, and the upper end of the traction rope is connected with the power locking mechanism; the reversing pulley comprises a fixed seat and a pulley, the fixed seat is fixed on the ladder frame between the rotatable wheel set and the power locking mechanism, the pulley is rotatably mounted on the fixed seat, and the pulley is configured to adjust the traction direction of the traction rope, so that the traction rope is opposite to the direction of the mounting plate pulled by the first reset spring.
Through the arrangement of the rotatable wheel set, when ascending operation is needed, the power locking mechanism is driven, the traction rope is pulled upwards and locked, the mounting plate is further driven to rotate for a certain distance around the first rotating shaft, the first reset spring is stretched, the roller arranged on the mounting plate is in contact with the ground, the bottom end of the ladder frame is supported to be away from the ground, the ladder frame is pushed to a target position and then is unlocked, the mounting plate and the roller are reset under the elastic action of the first reset spring, the traction rope and the power locking mechanism are further pulled to reset, and the power locking mechanism is locked; meanwhile, the roller leaves the ground, the bottom end of the ladder frame is contacted with the ground again, so that the ladder frame is stably contacted with the ground, and the climbing operation at the target position is started. The movable wheel set is provided with a traction rope which can contact with the ground to roll and leave the ground to switch between two states, so that the climbing ladder can move more conveniently and quickly.
Preferably, the rotatable wheelset further comprises a connecting plate, the lower end of the connecting plate is vertically fixedly connected to the mounting plate, and a first connecting seat is arranged at the upper end of the connecting plate. Through setting up the connecting plate, can guarantee when the distance between first connecting seat and the switching-over pulley is nearest, perhaps before the distance between first connecting seat and the switching-over pulley is nearest, the gyro wheel can rotate as to ground contact and the rolling position of being convenient for, effectively increases the tractive distance of tractive rope promptly, makes the rotation of gyro wheel easier.
Preferably, the traction mechanism comprises a first traction rope and a second traction rope, the upper ends of the first traction rope and the second traction rope are both connected with the power locking mechanism, and the lower ends of the first traction rope and the second traction rope are respectively fixedly connected with a first connecting seat arranged on the opposite side surface of the lower part of the ascending ladder. The traction force is reversed by the cooperation of the pulleys and the traction ropes, so that multiple setting modes can be realized, multiple groups of traction ropes can be set, each group of traction ropes are connected with the mounting plate needing traction rotation respectively, a group of traction ropes can also be used, the lower end of each traction rope can be rotated between the first connecting seats of the rotatable wheel groups, and the traction ropes can be adaptively set according to the requirements on synchronism and the size of driving force.
Including preferred, traction mechanism includes first fixing base and second fixing base, first fixing base is equipped with first left pulley and first right pulley, the second fixing base is equipped with second left pulley and second right pulley, first tractive rope is walked around the upside of first left pulley and the downside of second left pulley are connected with the first connecting seat of homonymy, the second tractive rope is walked around the upside of first right pulley and the upside of second right pulley are connected with the first connecting seat of homonymy. The rotatable wheel set is pulled by a plurality of groups of pulling ropes, so that the synchronism of the rotatable wheel set in the rotating process is better.
Preferably, the power locking mechanism is a hand brake operating mechanism or a servo motor with a brake. The power locking mechanism is a mechanism which provides power to pull the lower end of the pulling rope for a certain displacement and can lock the position of the pulling rope after the pulling rope is moved, the power locking mechanism can be selected according to needs and financial budget, a commercially available servo motor with a brake can be used in the structure at present, and a manual brake control mechanism can be adopted to complete the operation, so that an operator provides driving force.
Preferably, the hand brake operating mechanism includes:
the operating mechanism comprises a base, a handle and a second connecting seat connected with the upper end of the pulling rope, a supporting seat is arranged on the base, the handle is rotatably connected with the supporting seat, the second connecting seat is connected with the handle, and the handle drives the second connecting seat to synchronously rotate to pull the pulling rope when rotating;
the brake mechanism is arranged in a hollow mode and comprises a gear seat, and a pawl, a linkage rod, a second reset spring and a button which are arranged in the hollow area of the handle, the gear seat is fixed on the base, brake teeth are arranged on the circumferential wall of the upper side of the gear seat, the pawl is rotatably connected with the inner wall of the shell of the handle, one end of the pawl is provided with a ratchet, and the handle and the second connecting seat are locked after being meshed with the brake teeth; the other end of the pawl is connected with the linkage rod; the lower end of the linkage rod is bent towards the pawl and connected with the ratchet to drive the ratchet to rotate, and the upper end of the linkage rod is fixedly connected with the button; the inner wall of the handle is lower than a step is arranged at the lowest end of the button, the second reset spring is sleeved on the linkage rod, two ends of the second reset spring are limited by the lower end of the button and the step respectively, and when the second reset spring is not deformed, the button at least partially extends out of the upper end of the handle.
Above-mentioned scheme provides a hand braking operating mechanism's scheme, and above-mentioned scheme has carried out the setting of adaptability to the structure of ladder of ascending a height, makes things convenient for operating personnel to operate.
Preferably, the handle is fixedly connected with the second rotating shaft, and the second connecting seat is arranged at an interval with the handle and fixedly connected with the rotating shaft. The handle and the second connecting seat can be arranged separately, so that a pulling rope can be conveniently connected with the second connecting seat; when the pulling rope is damaged, the pulling rope is convenient to replace.
Preferably, the second connecting seat is arc-shaped or wheel-shaped, and the circle center area is fixedly connected with the second rotating shaft. The radius of the second connecting seat can be adjusted according to the distance needing to be moved during traction, the different distances of the lower end during traction can be moved when the same angle is rotated, operation of operators is more convenient, and experience is better.
Preferably, the linkage rod comprises a transmission rod at the upper part and a bent sleeve at the lower part, the lower end of the transmission rod is fixedly connected with the upper end of the bent rod, the linkage rod is divided into two parts, and the linkage rod can be conveniently manufactured.
Preferably, the pulling rope is a steel wire rope, and the steel wire rope is high in strength and wear-resistant.
The application has the advantages that: the application provides a portable ladder of ascending a height, including rotatable wheelset, power locking structure and traction mechanism, be equipped with rotatable and automatic re-setting's wheelset on the portable wheelset, tractive and locking control through power locking structure can roll with ground contact, and leave and switch between two states on ground, through traction mechanism can be fine adjust the lower extreme of tractive rope with the connection direction of rotatable wheelset makes the rotation of rotatable wheelset to realize. Through the technical scheme, the ascending ladder can be moved more conveniently and rapidly without cooperation of multiple persons.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a front view of a movable ascending ladder according to an embodiment of the present application;
fig. 2 is a side view of a movable ascending ladder according to an embodiment of the present application;
fig. 3 is a top view of a movable ascending ladder according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a hand brake operating mechanism of a movable ascending stair according to an embodiment of the present application;
fig. 5 is a schematic side view of a hand brake operating mechanism of a movable ascending ladder according to an embodiment of the present application;
fig. 6 is a top view of a hand brake operating mechanism of a movable ascending ladder according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1 to 6, a movable ascending ladder includes a ladder frame 1, and further includes:
the movable wheel assembly 2 comprises a first rotating shaft 21, a plurality of mounting plates 22, a roller 23 and a first return spring 24, wherein the first rotating shaft 21 is arranged on the opposite side surfaces of the lower part of the ascending ladder, is equal in height and parallel to each other, and is rotatably connected with the ladder frame 1; each mounting plate 22 is arranged in parallel and is fixedly connected with the first rotating shaft 21, and one end, far away from the first rotating shaft 21, of each mounting plate 22 is provided with a first connecting seat connected with a traction rope; the rollers 23 are mounted on the mounting plate 22; two ends of the first return spring 24 are respectively rotatably connected with the lower part of the ladder rack 1 and the mounting plate 22 and are both far away from the first rotating shaft 21;
the power locking mechanism 3 is arranged at the upper part of the ladder frame 1, is configured to drive the traction ropes to move, and locks the positions of the traction ropes after the traction ropes reach a preset stroke;
the traction mechanism 4 comprises the traction rope and a reversing pulley, the lower end of the traction rope is connected with the first connecting seat, and the upper end of the traction rope is connected with the power locking mechanism 3; the reversing pulley comprises a fixed seat and a pulley, the fixed seat is fixed on the ladder frame 1 between the rotatable wheel set 2 and the power locking mechanism 3, the pulley is rotatably mounted on the fixed seat, and the pulley is configured to adjust the pulling direction of the pulling rope, so that the pulling rope is opposite to the direction of the first reset spring 24 pulling the mounting plate 22.
Through the arrangement of the rotatable wheel set 2, when climbing operation is needed, the power locking mechanism 3 is driven, the pulling rope is pulled upwards and locked, the mounting plate 22 is driven to rotate around the first rotating shaft 21 for a certain distance, the first return spring 24 is stretched, the roller 23 arranged on the mounting plate 22 is in contact with the ground, the bottom end of the ladder frame 1 is supported to be away from the ground, the locking is released after the ladder frame 1 is pushed to a target position, the mounting plate 22 and the roller 23 are reset under the action of the elastic force of the first return spring 24, the pulling rope and the power locking mechanism 3 are pulled to reset, and the power locking mechanism 3 is locked; meanwhile, the roller 23 leaves the ground, the bottom end of the ladder frame 1 is contacted with the ground again, so that the ladder frame 1 is stably contacted with the ground, and the climbing operation at the target position is started. The movable wheel set is provided with a traction rope which can contact with the ground to roll and leave the ground to switch between two states, so that the climbing ladder can move more conveniently and quickly.
In some embodiments of the present application, in order to make the roller 23 rotate to a position where the roller contacts the ground and is convenient to roll when the distance between the first connecting seat and the reversing pulley is the shortest or before the distance between the first connecting seat and the reversing pulley is the shortest, the rotatable wheel set 2 further includes a pulling mechanism 25, the pulling mechanism 25 is vertically fixed on the mounting plate 22 at the lower end and is provided with the first connecting seat at the upper end. Further, the shape of the pulling mechanism 25 may be a plate shape, a rod shape, or other shapes that can extend in the vertical direction of the mounting plate 22, and is not limited to a plate shape.
The force of using pulley and tractive rope cooperation to the tractive is commuted and can have multiple setting mode, can set up multiunit tractive rope, makes each group tractive rope be connected with the rotatory mounting panel 22 of needs tractive respectively, also can use a set of tractive rope, makes the lower extreme of tractive rope revolute between the first connection seat of each rotatable wheelset 2, and specific circumstances can be according to the requirement to the synchronism to and drive power is including going the adaptability setting. In some embodiments of the present application, as shown in fig. 1 to 3, the traction mechanism 4 includes a first traction rope 41 and a second traction rope 42, the upper ends of the first traction rope 41 and the second traction rope 42 are both connected to the power locking mechanism 3, and the lower ends of the first traction rope and the second traction rope are respectively fixedly connected to first connection seats disposed on opposite sides of the lower portion of the ascending ladder. Therefore, the rotatable wheel sets 2 arranged on the two opposite sides of the lower portion of the ladder frame 1 are better in synchronism in the rotating process, and the rotating pulling force can be dispersed on the two groups of pulling ropes, so that the abrasion of the pulling ropes is effectively reduced.
In order to better cooperate with the two sets of pulling ropes, in some embodiments of the present application, as shown in fig. 1 to 3, the pulling mechanism 4 includes a first fixing seat 43 and a second fixing seat 44, the first fixing seat 43 is provided with a first left pulley 45 and a first right pulley 46, the second fixing seat 44 is provided with a second left pulley 47 and a second right pulley 48, the first pulling rope 41 passes around the upper side of the first left pulley 45 and the lower side of the second left pulley 47 to be connected with the first connecting seat on the same side, and the second pulling rope 42 passes around the upper side of the first right pulley 46 and the upper side of the second right pulley 48 to be connected with the first connecting seat on the same side. This is to use a plurality of groups of pulling ropes to pull the rotatable wheel set 2, so that the synchronism of the rotatable wheel set 2 in the rotating process is better.
The power locking mechanism 3 is a mechanism for providing power to pull the lower end of the pulling rope for a certain displacement and locking the position of the pulling rope after the pulling rope is moved, and can be selected according to requirements and financial budget. For example, as shown in fig. 4 to 6, in some embodiments of the present application, the hand brake operating mechanism includes:
the operating mechanism comprises a base 31, a handle 32 and a second connecting seat 33 connected with the upper end of the traction rope, a supporting seat 31a is arranged on the base 31, the handle 32 is rotatably connected with the supporting seat 31a, the second connecting seat 33 is connected with the handle 32, and when the handle 32 rotates, the second connecting seat 33 is driven to synchronously rotate to pull the traction rope;
the brake mechanism is arranged in a hollow manner in the handle 32, the brake mechanism comprises a gear seat 34, a pawl 35, a linkage rod 36, a second return spring 37 and a button 38, the pawl 35, the linkage rod 36, the second return spring 37 and the button 38 are arranged in the hollow area of the handle 32, the gear seat 34 is fixed on the base 31, brake teeth 34a are arranged on the circumferential wall of the upper side of the gear seat 34, the pawl 35 is rotatably connected with the inner wall of the shell of the handle 32, one end of the pawl 35 is provided with a ratchet 35a, and the handle 32 and the second connecting seat 33 are locked after the ratchet 35a is meshed with the brake teeth 34 a; the other end of the pawl 35 is connected with the linkage rod 36; the lower end of the linkage rod 36 is bent towards the pawl 35, the linkage rod is connected with the ratchet 35a and then drives the ratchet 35a to rotate, and the upper end of the linkage rod 36 is fixedly connected with the button 38; a step 32a is arranged at a position, lower than the lowest end of the button 38, on the inner wall of the handle 32, the second return spring 37 is sleeved on the linkage rod 36, two ends of the second return spring are limited by the lower end of the button 38 and the step 32a respectively, and when the second return spring 37 is not deformed, the button 38 at least partially extends out of the upper end of the handle 32.
Above-mentioned scheme has carried out the setting of adaptability to the structure and the traction mechanism 4 of ascending a height ladder, makes things convenient for operating personnel to operate.
In addition, in some embodiments of the present application, the hand brake operating mechanism further includes a second rotating shaft, the second rotating shaft is rotatably connected to the supporting seat 31a, the handle 32 is fixedly connected to the second rotating shaft, and the second connecting seat 33 is spaced from the handle 32 and is fixedly connected to the rotating shaft. The handle and the second connecting seat 33 can be separately arranged, so that a pulling rope can be conveniently connected with the second connecting seat 33; when the pulling rope is damaged, the pulling rope is convenient to replace.
In order to facilitate connection, in some embodiments of the present application, the second connecting seat 33 is configured to be arc-shaped or wheel-shaped, and a circle center region is fixedly connected to the second rotating shaft. The radius of second connecting seat 33 can be adjusted according to the distance that needs to remove when the tractive the realization is when rotating the same angle, and the different distance in lower extreme when can removing the tractive makes operating personnel's operation more convenient, experiences better.
In order to facilitate the processing and installation of the linkage rod 36, the linkage rod 36 comprises an upper transmission rod 36a and a lower bent sleeve 36b, the lower end of the transmission rod 36a is fixedly connected with the upper end of the bent rod, the linkage rod 36 is divided into two parts, and the two parts can be processed separately and installed step by step.
The pulling rope should be made of a high-strength and wear-resistant material, preferably a steel wire rope, and the steel wire rope is high in strength, wear-resistant, cheaper than other materials with the same performance, and capable of reducing production cost.
The application has the advantages that: the application provides a portable ladder of ascending a height, including rotatable wheelset, power locking structure and traction mechanism, be equipped with rotatable and automatic re-setting's wheelset on the portable wheelset, tractive and locking control through power locking structure can roll with ground contact, and leave and switch between two states on ground, through traction mechanism can be fine adjust the lower extreme of tractive rope with the connection direction of rotatable wheelset makes the rotation of rotatable wheelset to realize. Through the technical scheme, the ascending ladder can be moved more conveniently and rapidly without cooperation of multiple persons.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a portable ladder of ascending a height, includes the ladder frame, its characterized in that still includes:
the rotatable wheel set comprises a first rotating shaft, a plurality of mounting plates, a roller and a first return spring, the first rotating shaft is arranged on the opposite side surfaces of the lower part of the ascending ladder, is mutually equal in height and parallel, and is rotationally connected with the ladder frame; each mounting plate is arranged in parallel and is fixedly connected with the first rotating shaft, and one end, far away from the first rotating shaft, of each mounting plate is provided with a first connecting seat connected with a traction rope; the roller is arranged on the mounting plate; two ends of the first return spring are respectively rotatably connected with the lower part of the ladder frame and the mounting plate and are both far away from the first rotating shaft;
the power locking mechanism is arranged at the upper part of the ladder frame and is configured to drive the traction ropes to move and lock the positions of the traction ropes after the traction ropes reach a preset stroke;
the traction mechanism comprises the traction rope and a reversing pulley, the lower end of the traction rope is connected with the first connecting seat, and the upper end of the traction rope is connected with the power locking mechanism; the reversing pulley comprises a fixed seat and a pulley, the fixed seat is fixed on the ladder frame between the rotatable wheel set and the power locking mechanism, the pulley is rotatably mounted on the fixed seat, and the pulley is configured to adjust the traction direction of the traction rope, so that the traction rope is opposite to the direction of the mounting plate pulled by the first reset spring.
2. The movable ascending ladder according to claim 1, further comprising a connecting plate, wherein the lower end of the connecting plate is vertically fixed to the mounting plate, and the upper end of the connecting plate is provided with a first connecting seat.
3. The movable ascending ladder according to claim 1, wherein said traction mechanism comprises a first traction rope and a second traction rope, the upper ends of said first traction rope and said second traction rope are connected to said power locking mechanism, and the lower ends of said first traction rope and said second traction rope are respectively fixedly connected to a first connecting seat disposed on the opposite side of said ascending ladder.
4. The movable ascending ladder according to claim 3, wherein the traction mechanism comprises a first fixing base and a second fixing base, the first fixing base is provided with a first left pulley and a first right pulley, the second fixing base is provided with a second left pulley and a second right pulley, the first traction rope is connected with the first connecting base on the same side by passing over the upper side of the first left pulley and the lower side of the second left pulley, and the second traction rope is connected with the first connecting base on the same side by passing over the upper side of the first right pulley and the upper side of the second right pulley.
5. The mobile ascending ladder according to any one of claims 1 to 4, wherein the power locking mechanism is a hand brake operating mechanism or a servo motor with a brake.
6. The mobile ascending ladder of claim 5, wherein said hand brake actuation mechanism comprises:
the operating mechanism comprises a base, a handle and a second connecting seat connected with the upper end of the pulling rope, a supporting seat is arranged on the base, the handle is rotatably connected with the supporting seat, the second connecting seat is connected with the handle, and the handle drives the second connecting seat to synchronously rotate to pull the pulling rope when rotating;
the brake mechanism is arranged in a hollow mode and comprises a gear seat, and a pawl, a linkage rod, a second reset spring and a button which are arranged in the hollow area of the handle, the gear seat is fixed on the base, brake teeth are arranged on the circumferential wall of the upper side of the gear seat, the pawl is rotatably connected with the inner wall of the shell of the handle, one end of the pawl is provided with a ratchet, and the handle and the second connecting seat are locked after the ratchet is meshed with the brake teeth; the other end of the pawl is connected with the linkage rod; the lower end of the linkage rod is bent towards the pawl and connected with the ratchet to drive the ratchet to rotate, and the upper end of the linkage rod is fixedly connected with the button; the inner wall of the handle is lower than a step is arranged at the lowest end of the button, the second reset spring is sleeved on the linkage rod, two ends of the second reset spring are limited by the lower end of the button and the step respectively, and when the second reset spring is not deformed, the button at least partially extends out of the upper end of the handle.
7. The movable ascending ladder according to claim 6, further comprising a second rotating shaft, wherein the second rotating shaft is rotatably connected to the supporting base, the handle is fixedly connected to the second rotating shaft, and the second connecting base is spaced from the handle and is fixedly connected to the rotating shaft.
8. The movable ascending ladder according to claim 6, wherein said second connecting base is configured in an arc shape or a wheel shape, and a circle center region is fixedly connected to said second rotating shaft.
9. The movable ascending ladder according to claim 6, wherein said linkage rod comprises an upper transmission rod and a lower bent bushing, and the lower end of said transmission rod is fixedly connected with the upper end of said bent rod.
10. The mobile ladder of claim 1, wherein the pull rope is a wire rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921729409.1U CN211230205U (en) | 2019-10-15 | 2019-10-15 | Movable ladder for ascending a height |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921729409.1U CN211230205U (en) | 2019-10-15 | 2019-10-15 | Movable ladder for ascending a height |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211230205U true CN211230205U (en) | 2020-08-11 |
Family
ID=71924045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921729409.1U Active CN211230205U (en) | 2019-10-15 | 2019-10-15 | Movable ladder for ascending a height |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211230205U (en) |
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2019
- 2019-10-15 CN CN201921729409.1U patent/CN211230205U/en active Active
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