Double hook single opening linkage

Abstract

The application discloses a double-hook single-opening linkage device in the technical field of mountaineering, rope, rescue and outdoor sports supplies, which comprises two hook mechanisms and a linkage traction mechanism, the linkage traction mechanism is connected to the two hook mechanisms, the hook mechanism comprises a shell, a hook and a self-locking mechanism, the self-locking mechanism is used for controlling the opening and closing of the hook, the states of the hooks of the two hook mechanisms are opposite, when the state of one of the hook mechanisms is switched, the linkage traction mechanism can drive the self-locking mechanism of the other hook mechanism to work, so that the state of the other hook mechanism is switched. The double-hook single-opening linkage device provided by the application can solve the risk of failure, wear or damage of the single-lock hook device, and can also reduce the possibility that personnel forget to perform the hook anti-falling operation due to negligence, thereby comprehensively reducing the risk of personnel falling.

Description

Technical Field

[0001] This invention relates to the fields of mountaineering, rope, rescue and outdoor sports equipment technology, and specifically to a double hook single-opening linkage device. Background Technology

[0002] Traditional hook safety devices play a crucial role in high-altitude activities and operations to prevent accidental falls. However, traditional devices typically only have one safety mechanism, which is susceptible to failure, wear, or damage. Furthermore, personnel may neglect to perform the hook fall protection procedure due to negligence, increasing the risk of falls.

[0003] For example, Chinese utility model patent application CN212235882U discloses a double-hook single-open linkage device, including two hooks, each hook having a hook body and a locking mechanism. A linkage control mechanism is also provided between the two hooks, comprising a steel wire cable. Both ends of the steel wire cable are connected to the locking mechanisms of the two hooks respectively. An adjuster is also provided on the steel wire cable, and a return spring is installed within the adjuster. The opening stroke of the locking mechanism of any hook is equal to the pull stroke of the steel wire cable core within the adjuster. The linkage control mechanism allows only one hook to be open at a time, while the other is closed. This ensures that the operator can switch hooks one at a time during rope switching, preventing both hooks from being open simultaneously and improving the safety of hook use. Although this device can solve the problem of personnel forgetting to hook the device due to negligence, on the one hand, relying on a single regulator for control can easily lead to wear and damage due to frequent use, thus affecting its working efficiency and safety; on the other hand, safety also needs to be considered, for example, misoperation, wire cable breakage, return spring failure and other problems may occur during operation, which may lead to safety accidents.

[0004] For the reasons mentioned above, there is an urgent need for equipment that ensures personnel safety while also being durable. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a double-hook single-opening linkage device. The double-hook single-opening linkage device solves the risks of failure, wear or damage of single-lock hook devices on the one hand, and reduces the possibility that personnel will forget to perform hook anti-fall operation due to negligence on the other hand, thus comprehensively reducing the risk of personnel falling.

[0006] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0007] This invention provides a double-hook single-opening linkage device, comprising two hook mechanisms and a linkage traction mechanism, wherein the linkage traction mechanism is connected to the two hook mechanisms;

[0008] The hook mechanism includes a housing, a hook, and a self-locking mechanism. The self-locking mechanism is installed inside the housing, and the hook is fixedly connected to one side of the housing. The self-locking mechanism is used to control the opening and closing of the hook. The hooks of the two hook mechanisms are in opposite states. When one hook mechanism switches states, the linkage traction mechanism can drive the self-locking mechanism of the other hook mechanism to work, so that the other hook mechanism switches states.

[0009] The linkage traction mechanism includes two cable mechanisms, which are rigid multi-degree-of-freedom mechanisms. Each cable mechanism is connected to two hook mechanisms. Each cable mechanism includes a rope and a limiting sleeve. The two ends of the rope are connected to two self-locking mechanisms, and the two ends of the limiting sleeve are connected to two housings. The limiting sleeve is fitted over the rope, and the stroke of the self-locking mechanism is the stroke that the rope can be pulled within the limiting sleeve.

[0010] Furthermore, the self-locking mechanism includes a vertical pin, a horizontal pin, a first reset device, and a second reset device. The top of the vertical pin is provided with an insertion hole that cooperates with the hook, and the upper side in the height direction is provided with a handle perpendicular to the vertical pin. The lower side in the height direction is provided with a pin hole perpendicular to the axial direction that cooperates with the horizontal pin.

[0011] The vertical pin can slide vertically relative to the housing, causing the insertion hole to engage or disengage with the hook, thereby locking or unlocking the hook mechanism. The horizontal pin can slide laterally relative to the housing, engaging or disengaging with the pin hole, thereby restricting or allowing the movement of the vertical pin.

[0012] The first reset device is mounted on the vertical pin to return the vertical pin to its initial position, and the second reset device is mounted on the horizontal pin to return the horizontal pin to its initial position. Only one of the first reset device and the second reset device is in working state at any given time.

[0013] Furthermore, the vertical pin has a handle hole corresponding to the position where the handle is installed. The handle is installed on the vertical pin by inserting it into the handle hole, and the handle hole is parallel to the pin hole.

[0014] Furthermore, the housing has a groove corresponding to the handle position, and by moving the handle along the groove, the vertical pin can be driven to slide relative to the housing.

[0015] Furthermore, the first reset device is a first reset spring, with one end of the first reset spring abutting against the vertical pin and the other end abutting against the housing;

[0016] And / or, the second reset device is a second reset spring, one end of which abuts against the horizontal pin and the other end against the housing.

[0017] Furthermore, one end of the rope of one of the cable mechanisms of the linkage traction mechanism is connected to the bottom end of the vertical pin of the self-locking mechanism of the first hook mechanism, and the other end is connected to the free end of the horizontal pin of the self-locking mechanism of the second hook mechanism.

[0018] One end of the rope of the other cable mechanism in the linkage traction mechanism is connected to the free end of the horizontal pin of the self-locking mechanism of the first hook mechanism, and the other end is connected to the bottom end of the vertical pin of the self-locking mechanism of the second hook mechanism.

[0019] Furthermore, the cable mechanism also includes a connector, through which the rope is connected to a horizontal or vertical pin.

[0020] Furthermore, the bottom end of the vertical pin and the free end of the horizontal pin are provided with connecting holes for cooperating with the connecting piece to connect the rope.

[0021] The cable mechanism also includes fasteners, and the rope is formed into a loop by the fixing action of the fasteners and connected to the connector.

[0022] Furthermore, it also includes a lifting rope and a connecting ring, with one end of the lifting rope connected to the bottom end of the hook mechanism and the other end connected to the connecting ring.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0024] The present invention provides a double-hook single-opening linkage device, comprising two hook mechanisms and a linkage traction mechanism, wherein the linkage traction mechanism is connected to the two hook mechanisms; each hook mechanism includes a housing, a hook, and a self-locking mechanism, wherein the self-locking mechanism is used to control the opening and closing of the hook, and the hooks of the two hook mechanisms are in opposite states. When one hook mechanism switches states, the linkage traction mechanism can drive the self-locking mechanism of the other hook mechanism to work, thereby switching the state of the other hook mechanism. Through the cooperation of the self-locking mechanism and the linkage traction mechanism, the two hook mechanisms are interlocked. By switching states between the two hook mechanisms, the risks of failure, wear, or damage of single-lock hook devices are solved on the one hand, and the possibility of personnel forgetting to perform hook anti-fall operation due to negligence is reduced on the other hand, thus comprehensively reducing the risk of personnel falling.

[0025] The present invention provides a double-hook single-opening linkage device, wherein the linkage traction mechanism includes two cable mechanisms, each of which is a rigid multi-degree-of-freedom mechanism. Each cable mechanism is connected to two hook mechanisms. Each cable mechanism includes a rope and a limiting sleeve. The two ends of the rope are connected to two self-locking mechanisms, and the two ends of the limiting sleeve are connected to two housings. The limiting sleeve is fitted over the rope. The opening stroke of the self-locking mechanism is the stroke to which the rope can be pulled within the limiting sleeve. The self-locking mechanism includes a vertical pin, a horizontal pin, a first reset device, and a second reset device. During operation, the two cable mechanisms work simultaneously, causing the two hook mechanisms to switch states simultaneously. This interactive approach reduces the wear and damage caused by frequent use due to relying solely on a controller, thus improving efficiency and safety, and enhancing the durability of the device. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the double-hook single-opening linkage device provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the working state of the double hook single opening linkage device provided in an embodiment of the present invention;

[0028] Figure 3 A front view of the hook mechanism provided in an embodiment of the present invention;

[0029] Figure 4 A side view of the hook mechanism provided in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the self-locking mechanism provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the linkage traction mechanism provided in an embodiment of the present invention.

[0032] In the diagram: 1. Hook mechanism; 2. Linkage traction mechanism; 3. Hook; 4. Self-locking mechanism; 5. Housing; 6. Cable mechanism; 7. Vertical pin; 8. Horizontal pin; 9. First return spring; 10. Second return spring; 11. Handle; 12. Insertion hole; 13. Handle hole; 14. Pin hole; 15. Connecting hole; 16. Rope; 17. Fastener; 18. Connector; 19. Restriction sleeve; 20. Safety rope; 21. Connecting ring. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0034] Example 1

[0035] This embodiment provides a double-hook single-opening linkage device, such as... Figure 1 As shown, it includes two hooking mechanisms 1 and a linkage traction mechanism 2, wherein the linkage traction mechanism 2 is connected to the two hooking mechanisms 1;

[0036] The hook mechanism 1 includes a housing 5, a hook 3, and a self-locking mechanism 4. The self-locking mechanism 4 is installed inside the housing 5, and the hook 3 is fixedly connected to one side of the housing 5. Figure 3 As shown, the self-locking mechanism 4 can lock and unlock the hook 3 through the traction mechanism brought by the linkage traction mechanism 2. The housing 5 provides support for the hook 3 and the self-locking mechanism 4. The housing 5 can be any shape structure that can provide support for the hook 6 and the self-locking mechanism 4.

[0037] The linkage traction mechanism 2 includes two cable mechanisms 6, which are rigid multi-degree-of-freedom mechanisms. Each cable mechanism 6 is connected to one of two hook mechanisms 1. Figure 6 As shown, the cable mechanism 6 includes a rope 16 and a limiting sleeve 19. The two ends of the rope 16 are connected to two self-locking mechanisms 4, and the two ends of the limiting sleeve 19 are connected to two housings 5. The limiting sleeve 19 is fitted over the rope 16. The limiting sleeve 19 can be bent but is not extensible, constraining the movement space of the rope 16 and ensuring the axial movement of the rope 16. The traction force is transmitted between the two hook mechanisms 1 through the linkage traction mechanism 2. The stroke of the self-locking mechanism 4 is the stroke that the rope 16 can pull within the limiting sleeve 19. The rope 16 used to provide the traction mechanism can be other parts that can play the same role, such as a wire rope or a multi-section tube connected by a universal coupling.

[0038] like Figure 5 As shown, the self-locking mechanism 4 includes a vertical pin 7, a horizontal pin 8, a first reset device, and a second reset device. The top of the vertical pin 7 is provided with an insertion hole 12 that cooperates with the hook 3. In this embodiment, one end of the hook 3 is fixed to one side of the housing 5, and the other end is located directly above the housing 5, on the same vertical line as the axis of the insertion hole 12. When the vertical pin 7 moves upward, the hook 3 can cooperate with the insertion hole 12 and lock.

[0039] A handle 11 perpendicular to the vertical pin 7 is provided on the upper side of the vertical pin 7 in the height direction. The vertical pin 7 also has a handle hole 13 corresponding to the position where the handle 11 is installed. The handle 11 is installed on the vertical pin 7 by inserting it into the handle hole 13.

[0040] The lower side of the vertical pin 7 in the height direction is provided with a pin hole 14 perpendicular to the axial direction that cooperates with the horizontal pin 8. The handle hole 13 is parallel to the pin hole 14, and the handle 11 is also parallel to the horizontal pin 8.

[0041] In this embodiment, the first reset device uses a first reset spring 9, and the second reset device uses a second reset spring 10. However, other mechanisms that can achieve the desired effect can also be used. The vertical pin 7 is divided into two sections, a thicker one and a thinner one. The first reset spring 9 is fitted onto the thinner section of the vertical pin 7, with one end abutting against the thicker section of the vertical pin 7 and the other end abutting against the housing 5. Similarly, the second reset spring 10 is fitted onto the horizontal pin 8, with one end abutting against the horizontal pin 8 and the other end abutting against the housing 5. When the first reset spring 9 of a certain hook mechanism 1 of the double hook single-opening linkage device is in a compressed state, its hook 3 engages with the insertion hole 12 and locks. Conversely, in a relaxed state, the hook 3 is unlocked. When the second reset spring 10 is in a compressed state, the vertical pin 7 and the horizontal pin 8 do not engage. Conversely, when the horizontal pin 8 is in a relaxed state, the vertical pin 7 does not engage with the horizontal pin 8. One of the first reset spring 9 and the second reset spring 10 must be in a compressed state, and the other is in a relaxed state.

[0042] The vertical pin 7 can slide vertically relative to the housing 5, causing the insertion hole 12 to engage or disengage with the hook, thereby locking or unlocking the hook mechanism 1. The horizontal pin 8 can slide laterally relative to the housing 5, engaging or disengaging with the pin hole 14, thereby restricting or allowing the movement of the vertical pin 7. When the horizontal pin 8 is not inserted into the pin hole 14, the vertical pin 7 can move. When the horizontal pin 8 is inserted into the pin hole 14, the vertical pin 7 is locked and cannot move.

[0043] The housing 5 has a groove corresponding to the position of the handle 11, which allows the handle 11 to move along a preset direction. By moving the handle 11 along the groove, the vertical pin 7 can slide relative to the housing. Under external force, the handle 11 can move towards the hook 3. When the first return spring 9 resets the vertical pin 7, the handle 11 returns to its initial position. The hook is fixedly connected to the side of the housing 5 without the groove, such as... Figure 4 As shown.

[0044] One end of the rope 16 of one of the cable mechanisms 6 in the linkage traction mechanism 2 is connected to the bottom end of the vertical pin 7 of the self-locking mechanism 4 of the first hook mechanism 1, and the other end is connected to the free end of the horizontal pin 8 of the self-locking mechanism 4 of the second hook mechanism 1; one end of the rope 16 of the other cable mechanism 6 in the linkage traction mechanism 2 is connected to the free end of the horizontal pin 8 of the self-locking mechanism 4 of the first hook mechanism 1, and the other end is connected to the bottom end of the vertical pin 7 of the self-locking mechanism 4 of the second hook mechanism 1.

[0045] When using the double-hook single-opening linkage device provided in this embodiment:

[0046] Initially, the two hook mechanisms of the double hook single-opening linkage device are in a locked state, labeled as hook mechanism A, and in an unlocked state, labeled as hook mechanism B. Correspondingly, the components of hook mechanism A are labeled as hook A, self-locking mechanism A, vertical pin A, horizontal pin A, first return spring A, second return spring A, handle A, insertion hole A, handle hole A, pin hole A, etc. The components of hook mechanism B are labeled in the same way. The above A and B labels are only to distinguish the hook mechanisms in different states and have no other special meaning.

[0047] Initially, hook mechanism A is in the locked state, at which time the socket A and hook A are engaged, the first return spring A is in the compressed state, the horizontal pin A is engaged with the pin hole A, and the second return spring A is in the relaxed state; hook mechanism B is in the unlocked state, at which time the socket A and hook A are separated, the first return spring A is in the relaxed state, the horizontal pin A is separated from the pin hole A, and the second return spring A is in the compressed state.

[0048] In use, first suspend the hook mechanism B on a fixed object such as a tower, then pull the handle B towards the hook B. At this time, the first return spring B is compressed, and the vertical pin B in the self-locking mechanism B moves upward axially. The insertion hole B at its upper end engages with the free end of the hook B. As the vertical pin B moves upward, when the horizontal pin B is at the same height as the pin hole B, the second return spring B changes from a compressed state to a relaxed state, causing the horizontal pin B to engage with the pin hole B, limiting the rebound of the first return spring B, and achieving the locking state of the hook B; Figure 2 As shown, within the same time period, the upward axial movement of the vertical pin B will apply a traction force F1 to the horizontal pin A in the hook mechanism A through the linkage traction mechanism 2. The horizontal pin A in the self-locking mechanism A moves laterally away from the vertical pin A. The second return spring A changes from a relaxed state to a compressed state. The horizontal pin A separates from the socket A. The first return spring A rebounds. The vertical pin A drives the handle A to move axially away from the hook A. The socket A separates from the free end of the hook A, realizing the unlocked state of the hook A. When the horizontal pin B and the vertical pin B cooperate, a traction force F2 will be generated. This force is generated at the same time as the rebound force generated when the first return spring A rebounds. The hook mechanism A and the hook mechanism B switch states simultaneously. After the switch, the hook mechanism A is in the unlocked state and the hook mechanism B is in the locked state.

[0049] The two limiting sleeves 19 of the two cable mechanisms 6 in the linkage traction mechanism 2 can make the two ropes 16 move in the axial direction, ensuring the normal transmission of traction force in the linkage traction mechanism 2. During use, the two hook mechanisms achieve alternating locking and unlocking through the traction mechanism. When one hook mechanism is in the open state, the other hook mechanism must be in the locked state, and vice versa.

[0050] Example 2

[0051] This embodiment provides a double-hook single-opening linkage device. Unlike embodiment 1, in this embodiment, the cable mechanism 6 further includes a connector 18, through which the rope 16 is connected to the horizontal pin 8 or the vertical pin 7. In this embodiment, the connector is a rigid component with two holes. The bottom end of the vertical pin 7 and the free end of the horizontal pin 8 also have connecting holes 15 for engaging with the connector 18 to connect the rope 16. The cable mechanism 6 also includes a fastener 17, through which the rope 16 forms a loop and connects to the connector 18. The fastener 17 and the connector 18 can be any other parts capable of performing the same function, and will not be described in detail here.

[0052] Example 3

[0053] This embodiment provides a double-hook single-opening linkage device. Unlike embodiment 2, in this embodiment, the double-hook single-opening linkage device further includes a lifting rope 20 and a connecting ring 21, as shown below. Figure 2 As shown, one end of the hoisting rope 20 is connected to the lower end of the hook mechanism 1, and the other end is connected to the wearable equipment on the worker's body through the connecting ring 21.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to explain the relative positional relationship and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0055] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0056] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A double hook single opening linkage characterized by: It comprises two hook mechanisms (1) and a linkage traction mechanism (2) connected to the two hook mechanisms (1); The hook mechanism (1) comprises a shell (5), a hook (3) and a self-locking mechanism (4) installed inside the shell (5), the hook (3) is fixedly connected to one side of the shell (5), the self-locking mechanism (4) is used for controlling the opening and closing of the hook (3), the states of the hooks (3) of the two hook mechanisms (1) are opposite, when the state of one of the hook mechanisms (1) is switched, the linkage traction mechanism (2) can drive the self-locking mechanism (4) of the other hook mechanism (1) to work, so that the other hook mechanism (1) is switched; The linkage traction mechanism (2) comprises two cable mechanisms (6), the cable mechanism (6) is a rigid multi-degree-of-freedom mechanism, the two cable mechanisms (6) are connected to the two hook mechanisms (1) respectively, the cable mechanism (6) comprises a rope (16) and a limiting sleeve (19), the two ends of the rope (16) are connected to the two self-locking mechanisms (4), the two ends of the limiting sleeve (19) are connected to the two shells (5), the limiting sleeve (19) is sleeved outside the rope (16), the stroke of the self-locking mechanism (4) opening is the pullable stroke of the rope (16) in the limiting sleeve (19); The self-locking mechanism (4) comprises a vertical pin (7), a horizontal pin (8), a first reset device and a second reset device, the top end of the vertical pin (7) is provided with a insertion hole (12) matched with the hook (3) in the axial direction, the upper side edge in the height direction is provided with a handle (11) perpendicular to the vertical pin (7), and the lower side edge in the height direction is provided with a pin hole (14) perpendicular to the axial direction matched with the horizontal pin (8); The vertical pin (7) can vertically slide relative to the shell (5), drive the insertion hole (12) to cooperate with or separate from the hook, and realize the locking or opening of the hook mechanism (1), the horizontal pin (8) can horizontally slide relative to the shell (5), cooperate with or separate from the pin hole (14), and be used for limiting or allowing the movement of the vertical pin (7); The first reset device is installed on the vertical pin (7) and is used for returning the vertical pin (7) to the initial position, the second reset device is installed on the horizontal pin (8) and is used for returning the horizontal pin (8) to the initial position, and only one of the first reset device and the second reset device is in the working state at the same time.

2. The dual hook, single opening linkage of claim 1, wherein: The vertical pin (7) is also provided with a handle hole (13) corresponding to the position where the handle (11) is installed, the handle (11) is installed on the vertical pin (7) by being inserted into the handle hole (13), and the handle hole (13) is parallel to the pin hole (14).

3. The dual hook, single opening linkage of claim 2, wherein: The shell (5) is provided with a sliding groove corresponding to the position of the handle (11), the handle (11) can drive the vertical pin (7) to slide relative to the shell by moving along the sliding groove.

4. The dual hook, single opening linkage of claim 1, wherein: The first reset device is a first reset spring (9), one end of the first reset spring (9) abuts against the vertical pin (7), and the other end abuts against the shell (5). And / or, the second reset device is a second reset spring (10), one end of the second reset spring (10) abuts on the cross pin (8), and the other end abuts on the shell (5).

5. The dual hook, single opening linkage of claim 1, wherein: The rope (16) of one of the cable mechanisms (6) of the linkage traction mechanism (2) is connected at one end to the bottom end of the vertical pin (7) of the self-locking mechanism (4) of the first hook mechanism (1), and at the other end to the free end of the cross pin (8) of the self-locking mechanism (4) of the second hook mechanism (1). The rope (16) of the other of the cable mechanisms (6) of the linkage traction mechanism (2) is connected at one end to the free end of the cross pin (8) of the self-locking mechanism (4) of the first hook mechanism (1), and at the other end to the bottom end of the vertical pin (7) of the self-locking mechanism (4) of the second hook mechanism (1).

6. The dual hook, single opening linkage of claim 1, wherein: The cable mechanism (6) further comprises a connecting piece (18), and the rope (16) is connected to the cross pin (8) or the vertical pin (7) through the connecting piece (18).

7. The dual hook, single opening linkage of claim 6, wherein: The bottom end of the vertical pin (7) and the free end of the cross pin (8) are further provided with a connecting hole (15) for cooperating with the connecting piece (18) to connect the rope (16).

8. The dual hook, single opening linkage of claim 6, wherein: The cable mechanism (6) further comprises a fastener (17), and the rope (16) is connected to the connecting piece (18) by being formed into a ring through the fixing action of the fastener (17).

9. The dual hook, single opening linkage of claim 1, wherein: Further comprising a lifting rope (20) and a connecting ring (21), one end of the lifting rope (20) is connected to the bottom end of the hook mechanism (1), and the other end is connected to the connecting ring (21).

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