High-altitude working ladder with automatic locking function

Abstract

The invention provides a high-altitude working ladder with an automatic locking function, and belongs to the technical field of high-altitude working ladders, the high-altitude working ladder comprises a working ladder body, the ladder head of the working ladder body is provided with at least two support columns, the upper ends of the support columns are provided with hooks, the openings of the hooks are provided with automatic locking mechanisms, and fixed pulleys are rotatably mounted in the hooks. The high-altitude working ladder has the beneficial effects that when the high-altitude working ladder is used for high-altitude working, the automatic locking mechanism can be controlled to be in an unlocking state firstly, then the tail part of the high-altitude working ladder is held by a hand to hang the high-altitude working ladder on a power transmission line, and finally the automatic locking mechanism is controlled to be in a locking state so as to lock an opening of the hook; therefore, the working ladder body is prevented from being separated from the power transmission line, and accidents caused by lack of the anti-unhooking structure at the ladder head position in the working ladder climbing process of operators are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of aerial work ladders, and in particular relates to an aerial work ladder with an automatic locking function. Background Art

[0002] At present, in the construction and maintenance of overhead power transmission lines, transmission line operations are mostly assisted by work ladders, and when using work ladders for high-altitude operations, it is necessary for maintenance personnel to first hang the insulated work ladder on the high-voltage transmission line, and then climb the insulated hanging work ladder to the maintenance site for maintenance after the hanging work ladder is fixed. In addition, according to the line safety regulations, before the operator reaches the ladder head to work and before the ladder head starts to move, the ladder head sealing door should be reliably closed or a protective rope should be used to prevent the ladder head from being unhooked.

[0003] However, since the sealing doors at the ladder heads of existing work ladders are all open, it is necessary for operators to climb up the suspended work ladder to the ladder head, manually lock the sealing door at the ladder head and then proceed with the work. At the same time, when the work is completed and the operator exits the work point, it is also necessary for the operator to manually unlock the door again.

[0004] Therefore, when using existing work ladders for aerial work, there are often the following safety hazards: when workers climb the work ladder, the movement of the human body will cause the transmission line to vibrate up and down and the work ladder to shake; at this time, since the sealing door at the ladder head is not closed, it is very easy for the wiring wheel at the ladder head to fall off the transmission line, causing the work ladder to fall from a high altitude, and causing the workers climbing the work ladder to fall from a high altitude. Summary of the invention

[0005] The technical problem solved by the present invention is to provide an aerial work ladder with an automatic locking function, and enable it to automatically open the locking device after hanging is completed, and firmly lock the ladder head on the power transmission line to avoid accidents caused by the lack of an anti-unhooking structure at the ladder head when the workers are climbing the work ladder.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is: a high-altitude work ladder with an automatic locking function, which includes a work ladder body, the ladder head of the work ladder body is provided with at least two support columns, the upper end of the support column is provided with a hook, and the opening of the hook is provided with an automatic locking mechanism, and the internal rotation of the hook is provided with a fixed pulley. Based on this, when using the present invention for high-altitude operations, it can first control the automatic locking mechanism to be in an unlocked state, then hold the tail of the high-altitude work ladder and hang it on the power transmission line, and finally control the automatic locking mechanism to be in a locked state to block the opening of the hook, thereby preventing the work ladder body from being separated from the power transmission line, and preventing accidents caused by the lack of an anti-unhooking structure at the ladder head during the operation of the operator climbing the work ladder.

[0007] Furthermore, the hook includes a vertical portion, and a lower horizontal portion and an upper horizontal portion are sequentially arranged on one side of the vertical portion from bottom to top, the lower horizontal portion is fixedly connected to the support column, and a vertically penetrating guide hole is arranged on the end of the lower horizontal portion of the hook away from the vertical portion, and a blind hole with an opening facing downward is arranged on the end of the upper horizontal portion of the hook away from the vertical portion; the automatic locking mechanism includes a vertical electric push rod fixedly installed on the lower horizontal portion or the support column, the controller of the vertical electric push rod is electrically connected to a remote control, and the protruding end of the vertical electric push rod can penetrate the guide hole and then be plugged into the blind hole to block the opening of the hook to prevent the working ladder body from being separated from the power transmission line.

[0008] Further, the remote controller is installed at the tail of the working ladder body. Since the remote controller is installed together with the working ladder body, the problem of the remote controller being lost can be avoided to a certain extent.

[0009] Furthermore, an auxiliary bracket is provided on the lower surface of the upper horizontal part of the hook, and a pressure sensor is installed on the lower end of the auxiliary bracket. The pressure sensor is communicatively connected to the controller of the vertical electric push rod, and the contact of the pressure sensor is arranged downward. When the hook is hung above the transmission line, the transmission line can exert an upward force on the contact of the pressure sensor. At this time, the pressure sensor will transmit a "locking" signal to the controller of the vertical electric push rod, and under the action of the controller, the vertical electric push rod will be controlled to extend the protruding end until it is plugged into the blind hole provided at the upper horizontal part of the hook, so as to block the opening of the entire hook and prevent the working ladder body from being separated from the transmission line; anyway, when the hook is not hung above the transmission line or the hook is to be separated from the transmission line, the pressure sensor does not contact the transmission line and is in an unstressed state. At this time, the pressure sensor will transmit a "locking" signal to the controller of the vertical electric push rod, and under the action of the controller, the vertical electric push rod will be controlled to retract the protruding end to open the opening of the entire hook, so as to ensure that the staff can smoothly hang the hook above the transmission line or remove it from the transmission line.

[0010] Furthermore, two connecting brackets are arranged on the lower surface of the upper horizontal part of the hook, and a fixed pulley is rotatably mounted between the two connecting brackets through a pin shaft. In this way, when the entire aerial work ladder needs to be moved, the friction between the entire aerial work ladder and the power transmission line can be reduced through the fixed pulley.

[0011] Furthermore, a circle of limiting grooves is provided on the outer circumferential surface of the fixed pulley, and the position of the power transmission line is constrained by the limiting grooves to prevent the fixed pulley and the power transmission line from being separated during the running process.

[0012] Furthermore, the lowest point of the bottom of the limiting groove is higher than the contact of the pressure sensor to ensure that the pressure sensor can be used normally.

[0013] Furthermore, the outer surface of the support column and the outer surface of the hook are coated with an insulating layer.

[0014] It can be seen from the above technical scheme that the present invention has the following advantages: when using the present invention for aerial work, it is possible to first control the automatic locking mechanism to be in an unlocked state through a remote controller or a pressure sensor, then hold the tail of the aerial work ladder and hang it on the transmission line, and finally control the automatic locking mechanism to be in a locked state through a remote controller or a pressure sensor to block the opening of the hook, thereby avoiding separation of the work ladder body from the transmission line, and avoiding accidents caused by the lack of an anti-unhooking structure at the ladder head during climbing of the work ladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0017] In the figure: 1. work ladder body; 2. support column; 3. hook; 4. vertical part; 5. upper horizontal part; 6. lower horizontal part; 7. auxiliary bracket; 8. pressure sensor; 9. fixed pulley; 10. vertical electric push rod; 11. remote control. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0019] like Figure 1As shown, the present invention provides a high-altitude work ladder with an automatic locking function, which includes a work ladder body 1, and the ladder head of the work ladder body 1 is provided with at least two support columns 2, and the upper end of each support column 2 is provided with a hook 3. The hook 3 includes a vertical portion 4, and one side of the vertical portion 4 is provided with a lower horizontal portion 6 and an upper horizontal portion 5 from bottom to top, and the lower surface of the upper horizontal portion 5 is provided with two connecting brackets, and a fixed pulley 9 is rotatably installed between the two connecting brackets through a pin shaft. The outer circumferential surface of the fixed pulley 9 is provided with a circle of limiting grooves, and the position of the power transmission line is constrained by the limiting grooves to prevent the fixed pulley 9 from being separated from the power transmission line during walking. The lower end of the lower horizontal portion 6 is fixedly connected to the support column 2, and an automatic locking mechanism is provided between the end of the lower horizontal portion 6 away from the vertical portion 4 and the end of the upper horizontal portion 5 away from the vertical portion 4, that is, the opening of the hook 3 is provided with an automatic locking mechanism, and the hook is unlocked and unlocked by the automatic locking mechanism.

[0020] Specifically, the automatic locking mechanism includes a vertically penetrating guide through hole provided on one end of the lower horizontal portion 6 of the hook 3 away from the vertical portion 4, a blind hole with an opening facing downward provided on one end of the upper horizontal portion 5 of the hook 3 away from the vertical portion 4, and a vertical electric push rod 10 fixedly mounted on the lower horizontal portion 6 or the support column 2. The extended end of the vertical electric push rod 10 can penetrate the guide through hole in the extended state and be plugged into the blind hole to block the opening of the hook 3; the extended end of the vertical electric push rod 10 can be completely located below the lower horizontal portion 6 in the retracted state to lock the opening of the hook 3, so as to facilitate the entry and exit of the power transmission line into the hook 3.

[0021] In addition, in order to facilitate the control of the working state of the automatic locking mechanism, the present invention also electrically connects the controller of the vertical electric push rod 10 to a remote controller 11 for controlling its working state, so that the staff can remotely control the working state of the automatic locking mechanism, and the remote controller 11 is preferably installed at the tail of the working ladder body 1 to avoid the remote controller 11 from being lost.

[0022] At the same time, the present invention also provides an auxiliary bracket 7 on the lower surface of the upper horizontal portion 5 of the hook 3, and a pressure sensor 8 is installed at the lower end of the auxiliary bracket 7. The pressure sensor 8 is communicatively connected to the controller of the vertical electric push rod 10, and the contact of the pressure sensor 8 is arranged downward and is lower than the lowest point of the bottom of the limiting groove. In this way, when the hook 3 is suspended above the power transmission line, the power transmission line can apply an upward force to the contact of the pressure sensor 8, and at this time the pressure sensor 8 will transmit a "locking" signal to the controller of the vertical electric push rod 10, and under the action of the controller, the vertical electric push rod 10 will be controlled to extend the protruding end until it is plugged into the blind hole provided at the horizontal portion 5 of the hook 3, so as to block the opening of the entire hook 3 and prevent the working ladder body 1 from being separated from the power transmission line; anyway, when the hook 3 is not suspended above the power transmission line or the hook 3 is to be separated from the power transmission line, the pressure sensor 8 does not contact the power transmission line and is in an unstressed state. At this time, the pressure sensor 8 will transmit a "locking" signal to the controller of the vertical electric push rod 10, and under the action of the controller, the vertical electric push rod 10 will be controlled to retract the protruding end to open the opening of the entire hook 3, so as to ensure that the staff can smoothly hang the hook 3 above the power transmission line or remove it from the power transmission line.

[0023] Based on this, when using the present invention for aerial work, the automatic locking mechanism can be first controlled to be in an unlocked state through the remote controller 11 or the pressure sensor 8, and then the tail of the aerial work ladder can be held and hung on the power transmission line, and finally the automatic locking mechanism can be controlled to be in a locked state through the remote controller 11 or the pressure sensor 8 to block the opening of the hook 3, thereby preventing the work ladder body 1 from being separated from the power transmission line, and preventing accidents caused by the lack of an anti-unhooking structure at the ladder head when the operator is climbing the work ladder.

[0024] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0025] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-altitude work ladder with an automatic locking function, comprising a work ladder body (1), characterized in that: The ladder head of the working ladder body (1) is provided with at least two support columns (2), the upper ends of the support columns (2) are provided with hooks (3), and the openings of the hooks (3) are provided with automatic locking mechanisms, and a fixed pulley (9) is rotatably mounted inside the hooks (3).

2. The aerial work ladder with automatic locking function according to claim 1, characterized in that: The hook (3) comprises a vertical portion (4), one side of the vertical portion (4) is provided with a lower horizontal portion (6) and an upper horizontal portion (5) in sequence from bottom to top, the lower horizontal portion (6) is fixedly connected to the support column (2), and a vertically penetrating guide through hole is provided at one end of the lower horizontal portion (6) of the hook (3) away from the vertical portion (4), and a blind hole with an opening facing downward is provided at one end of the upper horizontal portion (5) of the hook (3) away from the vertical portion (4); the automatic locking mechanism comprises a vertical electric push rod (10) fixedly mounted on the lower horizontal portion (6) or the support column (2), a controller of the vertical electric push rod (10) is electrically connected to a remote controller (11), and an extended end of the vertical electric push rod (10) can penetrate the guide through hole and then be plugged into the blind hole.

3. The aerial work ladder with automatic locking function according to claim 2, characterized in that: The remote controller (11) is installed at the rear of the working ladder body (1).

4. The aerial work ladder with automatic locking function according to claim 2, characterized in that: An auxiliary bracket (7) is arranged on the lower surface of the upper horizontal portion (5) of the hook (3), and a pressure sensor (8) is installed at the lower end of the auxiliary bracket (7). The pressure sensor (8) is communicatively connected to a controller of the vertical electric push rod (10), and a contact of the pressure sensor (8) is arranged downward, and when the hook (3) is suspended above a power transmission line, the power transmission line can exert an upward force on the contact of the pressure sensor (8).

5. The aerial work ladder with automatic locking function according to claim 4, characterized in that: Two connecting brackets are provided on the lower surface of the upper horizontal portion (5) of the hook (3), and a fixed pulley (9) is rotatably mounted between the two connecting brackets via a pin shaft.

6. The aerial work ladder with automatic locking function according to claim 5, characterized in that: The outer circumferential surface of the fixed pulley (9) is provided with a circle of limiting grooves.

7. The aerial work ladder with automatic locking function according to claim 6, characterized in that: The lowest point of the groove bottom of the limiting groove is higher than the contact of the pressure sensor (8).

8. The aerial work ladder with automatic locking function according to any one of claims 1 to 7, characterized in that: The outer surface of the support column (2) and the outer surface of the hook (3) are coated with an insulating layer.

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