CN115478773A

CN115478773A - Safety protection device for climbing ladder

Info

Publication number: CN115478773A
Application number: CN202211152775.1A
Authority: CN
Inventors: 王红军; 熊玉刚; 王亚南; 粘文超; 张宇琦; 林彬; 杨治; 刘阳阳; 杨颖�; 李金柱
Original assignee: State Grid Corp of China SGCC; Hengshui Power Supply Co of State Grid Hebei Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Hengshui Power Supply Co of State Grid Hebei Electric Power Co Ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2022-12-16

Abstract

The invention provides a safety protection device for climbing a ladder, belonging to the technical field of safety protection. The lower end of the main frame is provided with a handle, and the lower end of the main frame is connected with a safety rope; the safety hook is connected above the main frame, an opening of the safety hook is arranged downwards, and a safety sheet is rotatably arranged inside the safety hook; the control block is elastically arranged at the upper part of the handle and can slide up and down along the opposite side walls of the main frame. The control block slides downwards to a first position so that the safety piece rotates to be attached to the inner wall of the safety hook, and the control block slides upwards to a second position so that the safety piece rotates to block the opening. According to the ladder climbing safety protection device, an operator can normally climb, the safety state of the operator can be kept in the climbing process, and meanwhile, the operator can be kept in a stable safety state when not climbing.

Description

Safety protection device for climbing ladder

Technical Field

The invention belongs to the technical field of safety protection, and particularly relates to a ladder climbing safety protection device.

Background

When high-altitude operators climb the building by means of foot nails or ladders on the outer wall of the building, cement poles, angle steel towers, steel pipe towers and the like, high-altitude falling and personal casualty accidents caused by losing hands under the conditions of inattentive attention, carelessness or insufficient physical strength often occur.

Disclosure of Invention

The invention aims to provide a ladder climbing safety protection device, which solves the problem that when an operator climbs, the operator loses hands to cause high-altitude falling personal casualty accidents under the conditions of inattention, carelessness or insufficient physical strength.

In order to achieve the purpose, the invention adopts the technical scheme that: the ladder climbing safety protection device comprises a main frame, wherein a handle is arranged at the lower end of the main frame, and a safety rope is connected to the lower end of the main frame;

the safety hook is connected above the main frame, an opening of the safety hook is arranged downwards, and a safety sheet is rotatably arranged in the safety hook;

the control block is elastically arranged at the upper part of the handle, and can slide along the opposite side walls of the main frame in a lifting way; the control block slides downwards to a first position so that the safety disc rotates to be attached to the inner wall of the safety hook, and the control block slides upwards to a second position so that the safety disc rotates to block the opening.

In a possible implementation manner, the safety disc is rotatably mounted inside the safety hook by means of the elastic resetting piece, and the safety disc blocks the opening under the elastic force of the elastic resetting piece.

In a possible implementation manner, a mounting groove is formed in the top of the handle, the control block is arranged in the mounting groove in a sliding manner, an elastic piece is arranged at the bottom of the control block, sliding blocks are arranged at two ends of the control block respectively, sliding grooves are formed in opposite side walls of the main frame respectively, the two sliding blocks are arranged in the corresponding sliding grooves in a sliding manner respectively, the sliding blocks are connected with the safety piece through connecting members, the control block slides downwards to a first position, and the safety piece is driven by the connecting members to be attached to the inner wall of the safety hook.

In a possible implementation manner, first channels are respectively formed in the opposite side walls and the top side wall of the main frame, two second channels which are respectively communicated with the two first channels one by one are formed in the safety hook, the lower end of each first channel is communicated with the corresponding sliding groove, the upper end of each second channel is communicated to the inner side of the safety hook, and the connecting member is connected to the inner side of the safety piece sequentially through the first channels and the second channels.

In a possible implementation manner, the connecting member is a flexible rope, the flexible rope sequentially penetrates through the first channel and the second channel, the lower end of the flexible rope is connected to the corresponding sliding block, and the upper end of the flexible rope is connected to the inner wall of the rupture disc.

In a possible implementation manner, a positioning switch is disposed on one side of the main frame, and the positioning switch is matched with the sliding block on the same side, so as to position the safety disc at the first position or the second position.

In a possible implementation manner, the positioning switch includes a U-shaped positioning block, the U-shaped positioning block has two positioning ends, two through holes are opened on the side wall of the main frame near the positioning switch from top to bottom, the two through holes correspond to the first position and the second position of the safety piece respectively, a clamping groove is opened on the outer side end of the slider, and the two positioning ends slide along the two through holes respectively in the transverse direction and are used for being inserted into the clamping groove.

In a possible implementation manner, the safety hook is rotatably installed, an accommodating concave portion is formed in the inner side wall of the safety piece, the accommodating concave portion is used for accommodating the safety piece and enabling the safety piece to be attached to the bottom of the accommodating concave portion, a clamping concave portion is formed in the inner side wall, far away from the installation of the safety piece, of the safety hook, and the clamping concave portion is used for clamping the safety piece to block the end portion of the safety piece in the open state.

In a possible implementation manner, the accommodating concave part is arranged on the inner wall of the rear side of the safety hook, the clamping concave part is located on the inner wall of the front side of the safety hook, the safety hook is rotatably installed on the lower side of the accommodating concave part, an arch-shaped structure is arranged on the front side wall of the safety hook, the inner wall of the front side of the safety hook forms the clamping concave part, and the lower end of the arch-shaped structure is connected with the guide section inclined towards the front side.

In a possible implementation manner, the safety rope is arranged at the lower end of any one side wall of the main frame.

The ladder climbing safety protection device provided by the invention has the beneficial effects that: compared with the prior art, the safety protection device is respectively held by two hands of an operator climbing the ladder. The safety hook above the main frame is hung on the foot nail or the ladder stand by hands holding on the handle and the control block, and the safety protection device respectively held by two hands alternately climbs upwards.

When an operator climbs upwards, the operator holds the control block by a hand to apply downward pressure, the control block slides downwards along the opposite side walls of the main frame, the lower part of the control block slides into the handle to reach a preset first position, the safety piece rotates to be attached to the inner wall of the safety hook, the safety piece does not block the opening of the safety hook, the opening of the safety hook is in an open state, the continuous and continuous upward climbing of the hook on a foot nail or a ladder stand can be realized, due to the influence of the self-weight factor of the operator, the safety protection device continuously receives downward tensile force, and the foot nail or the ladder stand cannot be separated from the safety hook in the open state. When the worker climbs in place, the hand holding the control block does not apply pressure downwards any more, the control block resets under the action of elasticity, and when the preset second position is reached, the safety piece rotates to the blocking opening to block the foot nail or the ladder in the safety hook, so that the safety protection device cannot fall off from the foot nail or the ladder. Because the main frame keeps stable connection with the human body through the safety rope, the personnel can be prevented from falling from the high place. The ladder climbing safety protection device provided by the invention has the advantages that the operator can normally climb, the safety state of the operator can be kept in the climbing process, and meanwhile, the operator can be kept in a stable safety state when not climbing. The problem of the operating personnel when climbing, the life and death accident that falls in high altitude that causes because the hand loss under the circumstances of inattentive attention, carelessness or physical strength is not enough appears.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, 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 safety piece in a ladder climbing safety device according to an embodiment of the present invention, the safety piece being in a state of opening an opening of a safety hook;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

fig. 4 is a front view of a safety piece in a state of blocking an opening of a safety hook in the ladder climbing safety protection device provided by the embodiment of the invention;

FIG. 5 is a side view of FIG. 4;

fig. 6 is a partially enlarged view of fig. 4 at B.

Description of the reference numerals:

1. a main frame; 2. a handle; 3. a safety hook; 4. a safety disc; 5. a control block; 6. a slider; 7. a chute; 8. a first channel; 9. a second channel; 10. a flexible cord; 11. a positioning switch; 12. an accommodating recess; 13. clamping the concave part; 14. a guide section; 15. a safety cord; 16. an elastic reset piece.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or suggest that the device or element referred to by 15 must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the present invention, "a plurality" means two or more unless specifically defined otherwise. It is to be understood that references not specifically made in one embodiment may refer to references made to other embodiments. In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "communicating," and the like are to be construed broadly, e.g., as meaning both mechanically and electrically connected; the connection may be direct, indirect or internal, or may be a connection between two elements or an interaction relationship between two elements. As will be apparent to one of ordinary skill in the art,

the specific meanings of the above terms in the present invention can be understood according to specific situations.

Referring to fig. 1 to 6, a ladder climbing safety protection device according to the present invention will now be described. The ladder climbing safety protection device comprises a main frame 1, a handle 2, a safety hook 3, a safety piece 4 and a control block 5.

The lower end of the main frame 1 is provided with a handle 2, and the lower end of the main frame 1 is connected with a safety rope 15; the safety hook 3 is connected above the main frame 1, the opening of the safety hook 3 is arranged downwards, and a safety sheet 4 is rotatably arranged inside the safety hook 3; the control block 5 is elastically arranged at the upper part of the handle 2, and the control block 5 can slide in a lifting way along the opposite side walls of the main frame 1.

The control block 5 slides downwards to a first position so that the safety disc 4 rotates to be attached to the inner wall of the safety hook 3, and the control block 5 slides upwards to a second position so that the safety disc 4 rotates to plug the opening.

Compared with the prior art, the ladder climbing safety protection device provided by the invention has the advantages that operators climbing the ladder can respectively hold one safety protection device by hands. The safety hook 3 above the main frame 1 is hung on a foot nail or a ladder stand by being held on the handle 2 and the control block 5 by hands, and the safety protection device respectively held by two hands alternately climbs upwards.

When the operation personnel climbs upwards, the control block 5 is held by a hand to apply downward pressure, the control block 5 slides downwards along the opposite side wall of the main frame 1, the lower part of the control block slides into the handle 2 to reach a preset first position, the safety piece 4 rotates to be attached to the inner wall of the safety hook 3, the safety piece 4 does not block the opening of the safety hook 3, the opening of the safety hook 3 is enabled to be in an open state, the continuous upward climbing of hooks on foot nails or climbing ladders can be realized continuously and alternately, due to the influence of dead weight factors of the operation personnel, the safety protection device continuously receives downward tensile force, and the foot nails or the climbing ladders cannot be separated from the safety hook 3 in the open state. When the worker climbs in place, the hand holding the control block 5 does not apply pressure downwards any more, the control block 5 resets under the action of elasticity, and when the preset second position is reached, the safety piece 4 rotates to block the opening, so that the foot nails or the ladder stands in the safety hooks 3 are sealed inside, and the safety protection device cannot fall off from the foot nails or the ladder stands. Because the main frame 1 is stably connected with the human body through the safety rope 15, the person can be prevented from falling from a high place. The ladder climbing safety protection device provided by the invention has the advantages that the operator can normally climb, the safety state of the operator can be kept in the climbing process, and meanwhile, the operator can be kept in a stable safety state when not climbing. The problem of the operating personnel when climbing, the life and death accident that falls in high altitude that causes because the hand loss under the circumstances of inattentive attention, carelessness or physical strength is not enough appears.

In some embodiments, referring to fig. 2 and 5, the safety plate 4 is rotatably installed inside the safety hook 3 by the elastic restoring member 16, and the safety plate 4 blocks the opening under the elastic force of the elastic restoring member 16.

In this embodiment, the elastic reset element 16 is a torsion spring, and is installed on the rotation shaft of the safety plate 4, and the torsion spring provides elasticity for the safety plate 4, so that the safety plate 4 is plugged at the opening of the safety hook 3 under the action of the elasticity.

When climbing upwards, control block 5 slides to the first position downwards, can provide the power opposite with the elasticity of torsional spring to insurance piece 4 to make the torsional spring continuously warp, and then make insurance piece 4 laminate on the inner wall of insurance hook 3, thereby make the opening of insurance hook 3 be in the state of opening.

When the climbing is not needed, the control block 5 elastically resets and upwards slides to the second position, external force is not provided for the safety plate 4 any more, and the torsion spring enables the safety plate 4 to reset under the action of the restoring force of the torsion spring, so that the opening of the safety hook 3 is plugged again.

Specifically, the mounting groove has been seted up at 2 tops of handle, control block 5 slides and sets up in the mounting groove, the bottom of control block 5 is equipped with the elastic component, the both ends of control block 5 are equipped with slider 6 respectively, spout 7 has been seted up respectively on the relative lateral wall of main frame 1, two slider 6 slide respectively and set up in corresponding spout 7, slider 6 passes through connecting elements and connects safety disc 4, control block 5 slides down to the first position, in order to drive the laminating of safety disc 4 on the inner wall of safety hook 3 through connecting elements.

In this embodiment, the elastic member is a spring, and is installed at the bottom of the installation groove, the upper end of the spring is connected to the lower end of the control block 5, and the lower end of the spring is connected to the bottom of the installation groove.

When the control block 5 is at the first position, the spring is in a compressed state and can provide upward elastic force; when the control block 5 is in the second position, the spring is in a natural state.

The sliding blocks 6 at the two ends of the control block 5 are symmetrically arranged, the sliding grooves 7 are longitudinally and symmetrically formed in the opposite side walls of the main frame 1, and the sliding blocks 6 are correspondingly arranged in the sliding grooves 7 in a sliding mode, so that the control block 5 can stably slide upwards or downwards, and the sliding blocks 6 and the sliding grooves 7 can play a role in guiding.

Meanwhile, one of the sliders 6 is connected with a connecting member which is connected with the safety plate 4, and the control block 5 slides downwards, so that the safety plate 4 is controlled to be attached to the inner wall of the safety hook 3 through the connecting member.

Referring to fig. 1, 2, 4 and 5, first passages 8 are formed in opposite side walls and a top side wall of the main frame 1, two second passages 9 respectively communicating the two first passages 8 one by one are formed in the safety hook 3, a lower end of each first passage 8 is communicated with the corresponding chute 7, an upper end of each second passage 9 is communicated to the inner side of the safety hook 3, and the connecting member is connected to the inner side of the safety piece 4 sequentially through the first passages 8 and the second passages 9.

In this embodiment, in order to hide the connection member, a first passage 8 is formed in the main frame 1, and a second passage 9 is formed in the safety hook 3. The first channel 8 and the second channel 9 are communicated with each other, the connecting component penetrates through the first channel 8 and the second channel 9, one end of the connecting component is connected to the sliding block 6, and the other end of the connecting component is connected to the side wall, close to the inside of the safety hook 3, of the safety sheet 4.

The control block 5 slides up and down, so that the slide block 6 and the connecting component can rotate the safety disc 4 to achieve the opening state and the blocking state of the opening of the safety hook 3.

Referring to fig. 1, 2, 4 and 5, the connecting member is a flexible rope 10, the flexible rope 10 sequentially penetrates through the first channel 8 and the second channel 9, the lower end of the flexible rope 10 is connected to the corresponding slider 6, and the upper end of the flexible rope 10 is connected to the inner wall of the rupture disc 4.

In this embodiment, the flexible rope 10 is a steel wire rope, and has flexibility and a certain connection strength. On the inside wall that safety chip 4 is close to the inside of safety hook 3, be fixed with the lug that has the connecting hole, the upper end system of wire rope is on the connecting hole of this lug, and when safety chip 4 rotated the laminating on the inner wall of safety hook 3, this lug can insert the port in second passageway 9 intercommunication safety hook 3 to realize that safety chip 4 and the inner wall of safety hook 3 laminate completely.

The port of the second channel 9 communicated with the safety hook 3 is provided with a steering wheel, the steel wire rope is wound on the steering wheel, the upward extending direction of the steel wire rope is converted into a connection mode approximately perpendicular to the inner wall of the safety sheet 4 through the steering wheel, and stable pulling force can be provided for the safety sheet 4, so that the elasticity of the torsion spring is overcome.

Similarly, in the first channel 8, a steering wheel can be arranged at the joint of the outer side wall and the top side wall, the steering wheel is arranged between the first channel 8 and the second channel 9, and the steering wheel is arranged at the bending part of the second channel 9, so that the smooth movement of the steel wire rope can be ensured.

An annular groove is formed in the sliding block 6, the lower end of the steel wire rope is tied in the annular groove, and in order to avoid tripping, a through hole is formed in the bottom of the annular groove, so that the lower end of the steel wire rope penetrates through the through hole to be bound in the circumferential direction, and the stability of connection of the steel wire rope and the sliding block 6 is improved.

In order to ensure that the safety disc 4 can be in a stable state in the opening and closing states, a positioning switch 11 is arranged on one side of the main frame 1, and the positioning switch 11 is matched with the slide block 6 on the same side, so that the safety disc 4 can be positioned at a first position or a second position.

Specifically, referring to fig. 1 to 6, the positioning switch 11 includes a U-shaped positioning block, the U-shaped positioning block has two positioning ends, two through holes are opened on the side wall of the main frame 1 near the positioning switch 11 from top to bottom, the two through holes correspond to the first position and the second position of the safety plate 4, respectively, a clamping groove is opened on the outer side end of the sliding block 6, and the two positioning ends slide along the two through holes, respectively, and are used for being inserted into the clamping groove.

In this embodiment, the U-shaped positioning block is disposed on one side of the main frame 1, two through holes are disposed on the side of the main frame 1 at intervals from top to bottom, the through holes are stepped holes, and positions of the two through holes are the same as positions of the sliding block 6 when the control block 5 moves to the first position and the second position. Two free ends of U-shaped locating piece are provided with the location end, the diameter of location end is less than the diameter of free end, two location ends wear to establish respectively in two through-holes, the cover is equipped with the spring on the location end, the one end of spring is connected on the step platform of through-hole, the other end of spring is connected on the free end, through the locating piece of impressing to main frame 1 one side, can make the location end of lower part insert in the draw-in groove when slider 6 is in the primary importance, perhaps make the location end of upper portion insert in the draw-in groove when slider 6 is in the secondary importance, thereby realize the location of control block 5 in primary importance or secondary importance.

Wherein, for the stability of guaranteeing the draw-in groove complex of location end and slider 6, set up the elastic layer in the periphery of location end or the inside of draw-in groove, when the two pegged graft each other, the elastic layer warp in order to increase corresponding frictional force, under the effect of not receiving the external force, and the location end can not deviate from in the draw-in groove.

Referring to fig. 2 and 5, an accommodating recess 12 is formed in the inner side wall of the safety hook 3 for rotatably mounting the safety disc 4, the accommodating recess 12 is used for accommodating the safety disc 4 and enabling the safety disc 4 to be attached to the bottom of the accommodating recess 12, a clamping recess 13 is formed in the inner side wall of the safety hook 3 far away from the mounting safety disc 4, and the clamping recess 13 is used for clamping the end portion of the safety disc 4 in an opening state.

In this embodiment, the accommodating recess 12 can completely accommodate the safety piece 4 in the open state, so that the safety hook 3 has a sufficient space inside, thereby ensuring that the foot nail or the ladder can smoothly enter, and avoiding reduction of the space where the safety hook 3 can be hooked due to the fact that the safety piece 4 cannot be completely accommodated.

In addition, joint concave part 13 is the arc recess, and it is kept away from the shape looks adaptation that sets up the circular arc end of torsional spring with rupture disc 4, and when rupture disc 4 closed the opening, the circular arc end of rupture disc 4 can be blocked and is established in this arc recess, for the form of conventional butt, does not have the gap in the opening direction. In addition, the arc-shaped clamping groove can also play a limiting role on the safety disc 4, and the situation that the safety disc 4 is difficult to rotate due to the fact that the safety disc is clamped with the inner wall of the safety hook 3 due to the fact that the safety disc 4 is too large in rotation angle is avoided.

Specifically, hold on concave part 12 locates the rear side inner wall of safety hook 3, joint concave part 13 is located the front side inner wall of safety hook 3, and safety hook 3 rotates and installs the downside of holding concave part 12, has seted up the arching structure on the preceding lateral wall of safety hook 3, and the arching structure forms joint concave part 13 at the front side inner wall of safety hook 3, and the lower extreme of arching structure connects the guide section 14 to the incline of front side.

In the present embodiment, the safety hook 3 is formed with an equal wall thickness, and the accommodating recess 12 is formed and the same protrusion is formed on the rear side of the safety hook 3, and the position of the engaging recess 13 is formed to form an overall outward arching structure to form a protrusion on the front side of the safety hook 3.

Wherein, the opening of the safety hook 3 faces downwards and inclines forwards, and is formed by a guide section 14 which is inclined downwards forwards at the lower end of the safety hook 3, so that the safety hook is convenient for operators to hang on the foot nails or the ladder from top to bottom. Furthermore, the guide section 14 is arranged such that the opening width of the safety hook 3 is greater than the inner width, thereby facilitating the guiding of the spike or ladder inside the safety hook 3.

In some embodiments, a safety line 15 is connected to the lower end of any one of the side walls of the main frame 1.

In this embodiment, be connected with a safety rope 15 on every main frame 1, the lower extreme integrated into one piece of one of them lateral wall of main frame 1 has the extension section, the connecting hole has been seted up to the lower extreme at this extension section, the one end of installation rope is in the connecting hole, but the other end direct system of safety rope 15 is between the waist or under the crotch of operation personnel simultaneously, even if operation personnel's hand breaks away from with this safety device carelessly, when owing to withdraw external force, insurance piece 4 blocks up the opening of insurance hook 3 all the time, operation personnel also can be pulled by safety rope 15, avoid appearing the problem that carelessly falls.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. Cat ladder climbing safety device, its characterized in that includes:

the safety rope device comprises a main frame (1), wherein a handle (2) is arranged at the lower end of the main frame (1), and a safety rope (15) is connected to the lower end of the main frame (1);

the safety hook (3) is connected above the main frame (1), the opening of the safety hook (3) is arranged downwards, and a safety sheet (4) is rotatably arranged in the safety hook (3);

the control block (5) is elastically arranged at the upper part of the handle (2), and the control block (5) can slide in a lifting way along the opposite side walls of the main frame (1); the control block (5) slides downwards to a first position, so that the safety plate (4) rotates to be attached to the inner wall of the safety hook (3), and the control block (5) slides upwards to a second position, so that the safety plate (4) rotates to block the opening.

2. A ladder climbing safety guard according to claim 1, characterised in that the safety disc (4) is rotatably mounted inside the safety hook (3) by means of the resilient return member (16), the safety disc (4) blocking the opening under the spring force of the resilient return member (16).

3. A ladder climbing safety protection device according to claim 2, wherein a mounting groove is formed at the top of the handle (2), the control block (5) is slidably disposed in the mounting groove, an elastic member is disposed at the bottom of the control block (5), sliding blocks (6) are respectively disposed at two ends of the control block (5), sliding grooves (7) are respectively formed on opposite side walls of the main frame (1), the two sliding blocks (6) are respectively slidably disposed in the corresponding sliding grooves (7), the sliding blocks (6) are connected to the safety plate (4) through a connecting member, and the control block (5) slides downward to a first position so as to drive the safety plate (4) to be attached to the inner wall of the safety hook (3) through the connecting member.

4. A ladder climbing safety device according to claim 3, wherein the main frame (1) is provided with first channels (8) in the opposite side walls and the top side walls, the safety hook (3) is provided with two second channels (9) inside for respectively communicating the two first channels (8), the lower end of the first channel (8) is communicated with the sliding groove (7), the upper end of the second channel (9) is communicated with the inner side of the safety hook (3), and the connecting member is connected to the inner side of the safety plate (4) through the first channel (8) and the second channel (9) in sequence.

5. A ladder climbing safety guard according to claim 4 in which the connecting member is a flexible cord (10), the flexible cord (10) passing through the first and second channels (8, 9) in sequence, the lower end of the flexible cord (10) being connected to the corresponding slider (6) and the upper end of the flexible cord (10) being connected to the inner wall of the rupture disc (4).

6. A ladder climbing safety guard according to claim 1, characterised in that one side of the main frame (1) is provided with a positioning switch (11), which positioning switch (11) cooperates with the slide (6) on the same side for positioning the rupture disc (4) in the first position or the second position.

7. A ladder climbing safety device according to claim 6, characterised in that the positioning switch (11) comprises a U-shaped positioning block having two positioning ends, the main frame (1) has two through holes from top to bottom in the side wall adjacent to the positioning switch (11), the two through holes respectively correspond to the first position and the second position of the safety plate (4), the outer end of the slide block (6) has a slot, and the two positioning ends respectively slide along the two through holes in the transverse direction for being inserted into the slot.

8. A ladder climbing safety protection device according to claim 1, wherein the inner side wall of the safety hook (3) rotatably installed on the safety sheet (4) is provided with a containing recess (12), the containing recess (12) is used for containing the safety sheet (4) and enabling the safety sheet to be attached to the bottom of the containing recess (12), the inner side wall of the safety hook (3) far away from the safety sheet (4) is provided with a clamping recess (13), and the clamping recess (13) is used for clamping the safety sheet (4) to block the end part in the opening state.

9. A ladder climbing safety device according to claim 8, characterized in that the receiving recess (12) is provided on the inner wall of the safety hook (3) on the rear side, the engaging recess (13) is provided on the inner wall of the safety hook (3) on the front side, the safety hook (3) is rotatably mounted on the lower side of the receiving recess (12), an arching structure is provided on the front side wall of the safety hook (3), the arching structure forms the engaging recess (13) on the inner wall of the safety hook (3) on the front side, and the lower end of the arching structure is connected to the guide section (14) inclined to the front side.

10. A ladder climbing safety guard according to any of claims 1-9, characterised in that the safety line (15) is provided at the lower end of either side wall of the main frame (1).