阅读说明：本技术 一种用于杆塔作业的重物防坠挂钩 (A couple is prevented weighing down by heavy object for shaft tower operation ) 是由 丁满华 于 2021-09-29 设计创作，主要内容包括：本发明属于架空配电线路施工设备技术领域,公开了一种用于杆塔作业的重物防坠挂钩。该挂钩包括壳体,连接重物并穿过壳体的绳子、钩体、锁紧机构和解锁机构。锁紧机构包括与壳体转动连接的压紧部,在锁紧状态下,压紧部能够将绳子抵压于壳体的内壁,以使绳子只能向上移动；解锁机构设置于壳体内,在解锁状态下,解锁机构能够驱动压紧部向远离绳子的方向转动以使绳子能够上下移动。该重物防坠挂钩能够单手操作,操作简单,方便工作人员在杆塔上装拆重物,降低作业风险并保证设备安全。(The invention belongs to the technical field of overhead distribution line construction equipment, and discloses a weight anti-falling hook for tower operation. The hook comprises a shell, a rope which is connected with a heavy object and penetrates through the shell, a hook body, a locking mechanism and an unlocking mechanism. The locking mechanism comprises a pressing part which is rotationally connected with the shell, and the pressing part can press the rope against the inner wall of the shell in a locking state so that the rope can only move upwards; the unlocking mechanism is arranged in the shell, and in an unlocking state, the unlocking mechanism can drive the pressing part to rotate in a direction away from the rope so as to enable the rope to move up and down. The hook for preventing the weight from falling can be operated by a single hand, is simple to operate, facilitates the assembly and disassembly of the weight on the tower by workers, reduces the operation risk and ensures the safety of equipment.)

1. The utility model provides a couple is prevented weighing down by heavy object for shaft tower operation which characterized in that has locking state and unblock state, the couple is prevented weighing down by heavy object includes:

one end of a rope (6) is connected with a heavy object (7), and the other end of the rope upwards penetrates through the shell (1) and extends out of the shell (1);

the hook body (2), the hook body (2) is fixedly connected to the outside of the shell (1);

the locking mechanism (4) comprises a pressing part (42) which is rotationally connected with the shell (1), and in the locking state, the pressing part (42) can press the rope (6) against the inner wall of the shell (1) so that the rope (6) can only move upwards;

the unlocking mechanism (3) is arranged on the shell (1), and in the unlocking state, the unlocking mechanism (3) can drive the pressing part (42) to rotate in the direction far away from the rope (6) so that the rope (6) can move up and down.

2. The weight anti-falling hook for tower operation as claimed in claim 1, wherein the unlocking mechanism (3) comprises a first switch (31), the first switch (31) is hinged to the outer wall of the shell (1), the first switch (31) abuts against the locking mechanism (4), and in the unlocking state, the first switch (31) can drive the pressing part (42) to rotate.

3. The weight anti-falling hook for tower operation as claimed in claim 2, wherein the unlocking mechanism (3) further comprises an anti-misoperation assembly (32), the anti-misoperation assembly (32) comprises a first elastic piece (321), a second switch (322) and a lever (323), the second switch (322) is arranged on the upper end face of the shell (1), and the first elastic piece (321) and the lever (323) are arranged inside the shell (1);

one end of the first elastic element (321) is connected to the lower surface of the second switch (322), the other end of the first elastic element is connected to one end of the lever (323), and the lever (323) is rotatably connected to the shell (1);

in the locking state, one end of the lever (323) far away from the first elastic piece (321) is abutted against the first switch (31);

in the unlocked state, the second switch (322) presses the first elastic member (321) downward to drive the lever (323) to rotate around a fulcrum to avoid the first switch (31).

4. The weight anti-falling hook for tower operation as claimed in claim 2, wherein the locking mechanism (4) further comprises a first connecting piece (41), one end of the first connecting piece (41) is fixedly connected with the pressing part (42), and the other end of the first connecting piece is abutted against the first switch (31).

5. The weight anti-falling hook for tower operation as claimed in claim 1, wherein the locking mechanism (4) further comprises a reset member (45) and a second connecting member (44), one end of the second connecting member (44) is connected with the pressing part (42), the other end is connected with the reset member (45), and the reset member (45) is connected with the inner wall of the housing (1); when the rope is in the unlocking state, the pressing part (42) drives the second connecting piece (44) to rotate clockwise so as to enable the resetting piece (45) to be in the stretching state, and when the rope is in the locking state, the resetting piece (45) resets so as to drive the second connecting piece (44) to drive the pressing part (42) to rotate anticlockwise so as to press the rope (6).

6. The weight anti-falling hook for tower operation as claimed in claim 5, wherein the reset member (45) is a compression spring.

7. The weight anti-falling hook for tower operation as claimed in claim 5, wherein the locking mechanism (4) further comprises a rotating shaft (43), the rotating shaft (43) is arranged on the housing (1), the joint of the pressing part (42) and the second connecting piece (44) is connected with the rotating shaft (43), and the pressing part (42) and the second connecting piece (44) are rotatably connected to the inner wall of the housing (1) through the rotating shaft (43).

8. The weight anti-falling hook for pole tower operation as claimed in any one of claims 1 to 7, wherein the pressing part (42) is a ratchet wheel, and the back of the teeth of the ratchet wheel is arranged towards the rope (6).

9. The weight anti-falling hook for tower operation as claimed in claim 1, wherein the interior of the housing (1) is provided with an inner housing, the inner housing divides the interior of the housing (1) into a first chamber (11) and a second chamber (12) located at the periphery of the first chamber (11), and the upper end surface and the lower end surface of the first chamber (11) are respectively provided with an opening so that the rope (6) can pass through the first chamber (11).

10. The weight anti-falling hook for tower operation as claimed in claim 1, wherein the hook head gap of the hook body (2) is provided with an anti-falling piece (5) so that the hook head can form a closed annular structure.

Technical Field

The invention relates to the technical field of overhead distribution line construction equipment, in particular to a weight anti-falling hook for tower operation.

Background

In the present electric power industry, when carrying out the construction of overhead distribution lines, the staff need with preventing weighing down the rope and tie up equipment and the fixed component that is close to before dismouting equipment tightly to prevent to install and remove the equipment in-process, equipment falls from the shaft tower, causes the damage of equipment or even casualties. In the assembling and disassembling process, according to the traditional construction method, workers need to vacate two hands to realize the rope binding action, particularly when the equipment is installed, the workers need to transfer the equipment to the tower and simultaneously perform the rope binding fixing action, and the operation is very inconvenient. Therefore, need to provide a heavy object that is used for shaft tower operation prevents weighing down couple, can realize one-hand operation to make things convenient for the construction operation of staff on the shaft tower, reduce the operation risk, guarantee equipment safety.

Disclosure of Invention

The invention aims to provide a weight anti-falling hook for tower operation, which can be operated by a single hand, is simple to operate, facilitates the assembly and disassembly of weights on towers by workers, reduces operation risks and ensures equipment safety.

In order to achieve the purpose, the invention adopts the following technical scheme:

a hook is prevented weighing down by heavy object for shaft tower operation has locking state and unblock state, and above-mentioned hook is prevented weighing down by heavy object includes:

one end of the rope is connected with a heavy object, and the other end of the rope upwards penetrates through the shell and extends out of the shell;

a hook fixedly connected to the outside of the housing;

the locking mechanism comprises a pressing part which is rotationally connected with the shell, and in the locking state, the pressing part can press the rope against the inner wall of the shell so that the rope can only move upwards;

and the unlocking mechanism is arranged on the shell, and can drive the pressing part to rotate in the direction away from the rope so as to enable the rope to move up and down in the unlocking state.

Optionally, the unlocking mechanism includes a first switch, the first switch is hinged to an outer wall of the housing, the first switch abuts against the locking mechanism, and the first switch can drive the pressing portion to rotate in the unlocking state.

Optionally, the unlocking mechanism further includes an anti-misoperation assembly, the anti-misoperation assembly includes a first elastic member, a second switch and a lever, the second switch is disposed on the upper end surface of the housing, and the first elastic member and the lever are disposed inside the housing;

one end of the first elastic element is connected with the lower surface of the second switch, the other end of the first elastic element is connected with one end of the lever, and the lever is rotatably connected with the shell;

in the locked state, one end of the lever, which is far away from the first elastic piece, is abutted against the first switch;

in the unlocked state, the second switch presses the first elastic piece downwards to drive the lever to rotate around the fulcrum to avoid the first switch.

Optionally, the locking mechanism further includes a first connecting member, one end of the first connecting member is fixedly connected to the pressing portion, and the other end of the first connecting member abuts against the first switch.

Optionally, the locking mechanism further includes a reset element and a second connecting element, one end of the second connecting element is connected to the pressing portion, the other end of the second connecting element is connected to the reset element, the reset element is connected to the inner wall of the housing, the pressing portion drives the second connecting element to rotate clockwise in the unlocked state so that the reset element is in a stretching state, and the reset element resets in the locked state so as to drive the second connecting element to drive the pressing portion to rotate counterclockwise so that the rope is pressed.

Optionally, the reset member is a compression spring.

Optionally, the locking mechanism further includes a rotating shaft, the rotating shaft is disposed on the housing, a joint between the pressing portion and the second connecting member is connected to the rotating shaft, and the pressing portion and the second connecting member are rotatably connected to the inner wall of the housing through the rotating shaft.

Optionally, the pressing portion is a ratchet wheel, and a back of teeth of the ratchet wheel is disposed toward the rope.

Optionally, an inner housing is disposed inside the housing, the inner housing divides the inside of the housing into a first chamber and a second chamber located at the periphery of the first chamber, and openings are respectively disposed on the upper end surface and the lower end surface of the first chamber, so that the rope can pass through the first chamber.

Optionally, an anti-falling part is arranged at a hook head notch of the hook body, so that a closed annular structure can be formed at the hook head.

The invention has the beneficial effects that:

according to the weight anti-falling hook, the rope is pressed on the inner wall of the shell through the locking mechanism so as to be locked, the rope is prevented from being separated from the shell under the action of the gravity of a weight, and an operator can conveniently transfer the weight to a tower and hang the weight at a fixed position through holding the hook; the hook is provided with the unlocking mechanism, so that an operator can conveniently control the hook to unlock the rope by one hand, and the other hand can adjust the heavy object to a required position; after the rope is adjusted to the required position, the rope is locked again, so that both hands can be vacated to perform binding work of the heavy object, the operation risk of operating personnel on the tower is effectively reduced, and the equipment safety is guaranteed.

Drawings

FIG. 1 is a schematic structural view of a weight anti-falling hook provided by the invention;

FIG. 2 is a partial schematic structural view of a weight anti-falling hook provided by the embodiment of the invention;

FIG. 3 is a partial structural schematic view of a weight anti-falling hook provided by the second embodiment of the invention.

In the figure:

1. a housing; 11. a first chamber; 12. a second chamber; 2. a hook body; 3. an unlocking mechanism; 31. a first switch; 32. an anti-misoperation assembly; 321. a first elastic member; 322. a second switch; 323. a lever; 324. a Z-shaped connecting rod; 4. a locking mechanism; 41. a first connecting member; 42. a pressing part; 43. a rotating shaft; 44. a second connecting member; 45. a reset member; 5. a drop-off prevention member; 6. a rope; 7. a weight; 8. angle iron.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to 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" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

Referring to fig. 1, the present embodiment provides a weight anti-falling hook for tower operation, which has a locking state and an unlocking state, and mainly comprises a housing 1, a hook body 2, a locking mechanism 4 and an unlocking mechanism 3. One end of the rope 6 is connected with the heavy object 7, the other end of the rope upwards penetrates through the shell 1 and extends out of the shell 1, and the hook body 2 is fixedly connected to the outer portion of the shell 1. The locking mechanism 4 comprises a pressing part 42 rotatably connected with the housing 1, and in a locking state, the pressing part 42 can press the rope 6 against the inner wall of the housing 1, and at this time, the rope 6 can only move upwards. The unlocking mechanism 3 is arranged on the housing 1, and in an unlocking state, the unlocking mechanism 3 can drive the pressing part 42 to rotate towards a direction far away from the rope 6 so as to enable the rope 6 to move up and down, thereby adjusting the position of the heavy object 7.

By penetrating the rope 6 into the shell 1, the locking mechanism 4 enables the rope 6 to be pressed on the inner wall of the shell 1 so as to lock the rope 6, and therefore an operator can conveniently transfer a heavy object 7 to a tower and hang the heavy object at a fixed position; the unlocking mechanism 3 is arranged on the hook, so that an operator can conveniently control the hook to unlock the rope 6 by one hand, and adjust the heavy object 7 to a required position by the other hand; after the position is adjusted to the required position, the rope 6 is locked again, so that both hands can be vacated to bind the heavy object 7, the operation risk of the operating personnel on the tower is effectively reduced, and the equipment safety is guaranteed.

Referring to fig. 2, in the weight anti-falling hook in the present embodiment, the housing 1 may be cylindrical or prismatic, and optionally, an anti-slip portion may be provided on an outer wall of the housing 1, and the anti-slip portion may be an anti-slip structure such as a protruding ridge and a particle with a raised surface, or a rubber anti-slip layer is provided on the surface of the housing 1 to prevent the housing 1 from falling off from the hand of the worker.

The unlocking mechanism 3 includes a first switch 31 and an erroneous operation preventing member 32. The first switch 31 is hinged to the outer wall of the housing 1 and abuts against the locking mechanism 4, and in the unlocked state, the first switch 31 can drive the pressing part 42 to rotate. In this embodiment, the cross-sectional shape of the first switch 31 is substantially fan-shaped and is convexly disposed on the side wall of the housing 1, the center of the fan-shaped circle is hinged to the outer wall of the housing 1, and the upper side of the fan-shaped circle is abutted to the locking mechanism 4. For preventing the maloperation, lead to rope 6 and heavy object 7 to drop down and take place danger, release mechanism 3 in this embodiment is still including preventing maloperation subassembly 32, only presses earlier and prevents maloperation subassembly 32, just can press first switch 31, makes first switch 31 rotate around its centre of a circle, and then the drive compresses tightly portion 42 and rotates so that rope 6 can reciprocate to the direction of keeping away from rope 6.

The anti-misoperation assembly 32 is arranged at the top of the shell 1 and comprises a first elastic piece 321, a second switch 322 and a lever 323, the second switch 322 is arranged on the upper end face of the shell 1, the first elastic piece 321 and the lever 323 are arranged inside the shell 1, one end of the first elastic piece 321 is connected to the lower surface of the second switch 322, the other end of the first elastic piece is connected to one end of the lever 323, and the lever 323 is rotatably connected to the shell 1. Alternatively, the first elastic member 321 is a compression spring, and is connected below the second switch 322 in a vertical direction, so that the second switch 322 can be pressed up and down. Further, the lever 323 is extended in a horizontal direction to be vertically connected to the first elastic member 321, and a fulcrum of the lever 323 is disposed at a side close to the second switch 322, so as to reduce a moment arm at the side of the second switch 322, thereby saving labor in operation.

In the locked state, one end of the lever 323, which is far away from the first elastic piece 321, abuts against the first switch 31, so that a worker is prevented from carelessly pressing the first switch 31 to enable the rope 6 and the heavy object 7 to fall off; in the unlocked state, the second switch 322 presses the first elastic member 321 downward to drive the lever 323 to rotate around the fulcrum to avoid the first switch 31, and at this time, the first switch 31 can be pressed. When the second switch 322 is pressed, the first elastic member 321 is deformed by pressure, and the lever 323 is pressed to rotate clockwise around the fulcrum, thereby avoiding the first switch 31. With first switch 31 setting at casing 1 lateral wall, second switch 322 sets up at casing 1 up end, can make things convenient for staff one-hand operation, as long as the thumb presses second switch 322, and the forefinger presses first switch 31, can the unblock.

In this embodiment, the pressing portion 42 of the locking mechanism 4 is a ratchet wheel, the back of the tooth of the ratchet wheel is arranged toward the rope 6, and in the locking state, the ratchet wheel presses the rope 6 on the inner wall of the housing 1 through the back of the tooth, and static friction exists between the ratchet wheel and the rope 6, so that the rope 6 cannot move downwards under the action of the ratchet wheel and can only move upwards. In other embodiments, the compacting portion 42 may be another component capable of preventing the rope 6 from automatically falling.

Optionally, the locking mechanism 4 further includes a first connecting member 41, one end of the first connecting member 41 is fixedly connected to the pressing portion 42, and the other end of the first connecting member 41 abuts against the first switch 31, and understandably, by the abutment of the first connecting member 41 and the first switch 31, the stress on the first switch 31 can be transmitted to the pressing portion 42 through the first connecting member 41, so as to unlock the rope 6.

Further, the locking mechanism 4 further comprises a reset piece 45 and a second connecting piece 44, one end of the second connecting piece 44 is connected with the pressing part 42, the other end of the second connecting piece 44 is connected with the reset piece 45, and the reset piece 45 is connected with the inner wall of the shell 1. When the rope 6 is in the unlocking state, the pressing part 42 drives the resetting piece 45 to rotate clockwise so as to enable the resetting piece 45 to be in the stretching state, and when the rope 6 is in the locking state, the resetting piece 45 resets to drive the second connecting piece 44 to drive the pressing part 42 to rotate anticlockwise so as to compress the rope. In this embodiment, the restoring member 45 is a compression spring horizontally disposed. According to the type of the compression spring and the position of the rotation center of the ratchet wheel, the second connecting member 44 is provided as two pieces of rod members connected at a certain angle or integrally formed in this embodiment, the lower piece is vertically connected with the restoring member 45, and the upper piece is obliquely arranged and fixedly connected with the pressing portion 42, so that a larger pressing force can be provided to the rope 6.

Optionally, the locking mechanism 4 further comprises a rotating shaft 43 connected to the inner wall of the housing 1, and the joint of the pressing portion 42 and the second connecting member 44 is connected to the rotating shaft 43 and is rotatably connected to the inner wall of the housing 1 through the rotating shaft 43. Specifically, the joint of the pressing portion 42 and the second connecting member 44 may be fixedly connected to the rotating shaft 43, and the rotating shaft 43 may be rotatably connected to the inner wall of the casing 1, or the joint of the pressing portion 42 and the second connecting member 44 may be rotatably connected to the rotating shaft 43, and the rotating shaft 43 may be fixedly connected to the inner wall of the casing 1. In this embodiment, the connection point between the ratchet and the second connecting member 44 is the rotation center of the ratchet.

Optionally, an inner housing is further disposed inside the housing 1, the inner housing divides the inside of the housing 1 into a first chamber 11 and a second chamber 12 located at the periphery of the first chamber 11, an upper end surface and a lower end surface of the first chamber 11 are respectively provided with an opening, and the rope 6 passes through the first chamber 11. The first chamber 11 is located at the central part of the shell 1, and the wall surface of the inner shell 1 is provided with an avoiding opening allowing the pressing part 42 to pass through, so that the rope 6 can be pressed on the inner wall of the inner shell, the design size of the pressing part 42 can be reduced by adopting the design, and the structure of the part in the shell 1 is more compact.

The hook body 2 comprises a hook head and a main body which are integrally formed, and the hook head is positioned at the top of the main body. The hook head gap is provided with an anti-falling part 5, so that the hook head can form a closed annular structure, the angle iron 8 (or other fixing components) is closed in the annular structure, and the hook body 2 is prevented from falling from the hanging part to cause danger. Optionally, the anti-slip member 5 comprises a rod-shaped member, a first collar connected to one end of the rod-shaped member, and a second collar connected to the other end of the rod-shaped member, wherein the rod-shaped member is of a flexible structure, the first collar is of a rigid structure, and the second collar can be of a flexible structure or a rigid structure. The inner wall of the first lantern ring is provided with an internal thread, the main body of the hook body 2 is provided with an external thread, the first lantern ring is connected with the main body of the hook body 2 through the internal thread and the external thread in a threaded mode, the first lantern ring and the main body form a screw nut structure, and the anti-falling piece 5 can move along the main body. When the hook body 2 needs to be closed, the second sleeve ring is upwards close to the hook head by rotating the anti-falling part 5, and then the second sleeve ring is sleeved into the hook head, so that the hook head is closed; when the hook needs to be taken down, the second sleeve ring can be directly taken down from the hook head because the rod-shaped piece is of a flexible structure and has certain elasticity, and then the anti-falling piece 5 is rotated to move downwards to be far away from the hook head. In order to prevent the second sleeve ring from automatically falling off, the hook head can be arranged to be upwards tilted.

The use of the weight anti-falling hook in the embodiment is described as follows: one end of the rope 6 is tied to a weight 7 (the device to be installed) and the other end passes upwardly through the first cavity from below the housing 1. In the case where the first switch 31 and the second switch 322 are not simultaneously pressed, the elastic force provided by the restoring member 45 causes the cord 6 to be caught between the inner case 1 and the pressing portion 42, and the cord 6 can move only the position of the adjustment weight 7 upward and cannot move downward. After a worker transmits a heavy object 7 to a tower through a rope 6, the worker holds the heavy object 7 with one hand and hangs a hook on an angle iron 8 (or other fixing components) with the other hand, and then the anti-falling part 5 is sleeved on the hook head. At this time, the hands are released, and the weight 7 does not fall down.

When the position of the weight 7 needs to be adjusted downwards, a worker carries the weight 7 with one hand, presses the first switch 31 with the index finger and presses the second switch 322 with the thumb, at the moment, the second switch 322 is stressed to compress the first elastic piece 321, the lever 323 rotates clockwise around the fulcrum, the lever 323 avoids the first switch 31, so that the first switch 31 can be pressed, the first switch 31 pushes the first connecting piece 41, under the action of the first connecting piece 41, the pressing part 42 and the second connecting piece 44 rotate clockwise around the rotating shaft 43, so that the pressing part 42 is far away from the rope 6 to enable the rope 6 to move up and down, and at the moment, the resetting piece 45 is compressed to store energy. When the first switch 31 and the second switch 322 are released, the reset element 45 is reset, the second connecting element 44 is driven to make the second connecting element 44 and the pressing part 42 rotate anticlockwise around the rotating shaft 43, the pressing part 42 drives the first connecting element 41 to move to abut against the first switch 31, and the rope 6 is clamped between the inner shell 1 and the ratchet wheel again. Through this heavy object anti-falling hook, the work of staff dismouting equipment on the shaft tower is simplified, can vacate both hands and realize tying up the rope action, and this heavy object anti-falling hook can realize one-hand operation, and is very convenient, and the operational risk is low, has guaranteed the security of staff and equipment.

Example two

The embodiment provides a weight anti-falling hook for tower operation, and the difference between the embodiment and the first embodiment is as follows:

as shown in fig. 3, the second switch 322 is a toggle switch disposed on the top surface of the housing 1 and may have a cylindrical or wedge shape, and optionally, the upper end surface of the second switch 322 is provided with an anti-slip rib. A Z-shaped connecting rod 324 and a first elastic member 321 are provided in the housing 1. The Z-shaped connecting rod 324 comprises a first short edge, a long edge and a second short edge, the first short edge and the second short edge are respectively vertically connected to two ends of the long edge, the first short edge and the second short edge are vertically arranged, and the long edge is horizontally arranged. Alternatively, a first short side is connected to the second switch 322, and a second short side is located on the left side of the first link 41. Preferably, the Z-shaped connecting bar 324 is an integrally formed piece.

Further, the first elastic member 321 is a compression spring horizontally disposed, and has one end connected to a first short side of the Z-shaped connecting rod 324 and the other end connected to the inner wall of the housing 1. The first switch 31 is arranged on the side wall of the shell 1 and can be pushed up and down along the shell 1, the upper portion of the first switch 31 is connected with a limiting part, the limiting part is located inside the shell 1, a limiting groove is formed in the limiting part, and in a locking state, the second short edge is clamped in the limiting groove, so that the rope can not be unlocked. When the rope needs to be unlocked, the first switch 31 is pushed downwards to enable the limiting groove to be separated from the second short edge, then the second switch 322 is pushed backwards to enable the second short edge to push the first connecting piece 41, and the rope is unlocked; when the rope needs to be locked, the second switch 322 is firstly loosened, the Z-shaped connecting rod 324 is reset under the action of the elastic force of the first elastic piece 321, and then the first switch 31 is pushed upwards, so that the second short edge of the Z-shaped connecting rod 324 is clamped in the limiting groove, and the rope is locked.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.