Double-hook single-opening linkage device

Abstract

The invention discloses a double-hook single-opening linkage device in the technical field of mountaineering, rope, rescue and outdoor sports goods, the double-hook single-opening linkage device comprises two hook mechanisms and a linkage traction mechanism, the linkage traction mechanism is connected to the two hook mechanisms, and each hook mechanism comprises a shell, a hook and a self-locking mechanism. The self-locking mechanism is used for controlling opening and closing of the hooks, the states of the hooks of the two hook mechanisms are opposite, and when one hook mechanism switches the state, 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. According to the double-hook single-opening linkage device, on one hand, the risk of failure, abrasion or damage of a single-lock hook device is avoided, on the other hand, the possibility that personnel forget to carry out hook anti-falling operation due to negligence is reduced, and the risk of personnel falling is comprehensively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of mountaineering, ropes, rescue and outdoor sports goods, and in particular to a double-hook single-open linkage device. Background Art

[0002] Traditional hook safety devices play an important role in high-altitude sports and operations to prevent accidental falls. However, traditional devices are usually equipped with only one safety mechanism, which has the risk of failure, wear or damage. There is also a risk that personnel may forget to perform the hook anti-fall operation due to negligence, increasing the risk of falling.

[0003] For example, the Chinese utility model patent application with application number CN212235882U discloses a double hook single opening linkage device, including two grab hooks, the grab hooks are provided with a grab hook body, and the grab hook body is provided with a locking mechanism; a linkage control mechanism is also provided between the two grab hooks, and the linkage control mechanism includes a wire rope, and the two ends of the wire rope are respectively connected to the locking mechanisms of the two grab hooks, and an adjuster is also provided on the wire rope, and a reset spring is also provided in the adjuster, wherein the opening stroke of the locking mechanism of any grab hook is the stroke that the wire rope core can be pulled in the adjuster. The linkage control mechanism can make only one of the two grab hooks in the open state and the other in the closed state, so that the operator can only switch one by one when switching the rope, preventing the two hooks from being in the open state at the same time, thereby improving the safety of hook use. Although this device can solve the problem of people forgetting to hook up due to negligence, on the one hand, relying solely on a single regulator for control can easily cause wear and damage due to frequent use, thus affecting its work efficiency and safety; on the other hand, safety also needs to be considered. For example, during operation, there may be problems such as misoperation, wire rope breakage, return spring failure, etc., all of which may lead to safety accidents.

[0004] In view of the above reasons, there is an urgent need for equipment that can ensure personnel safety and durability. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a double-hook single-opening linkage device, which, on the one hand, solves the risk of failure, wear or damage of a single-lock hook device, and on the other hand, reduces the possibility of personnel forgetting to perform the hook anti-fall operation due to negligence, thereby comprehensively reducing the risk of personnel falling.

[0006] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0007] The present invention provides a double-hook single-open 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 comprises a housing, a hook and a self-locking mechanism, wherein the self-locking mechanism is installed inside the housing, the hook is fixedly connected to one side of the housing, and 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, and when one of the hook mechanisms 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. The two cable mechanisms are respectively connected to two hook mechanisms. The cable mechanism includes a rope and a limiting sleeve. The two ends of the rope are connected to two self-locking mechanisms. The two ends of the limiting sleeve are connected to two shells. The limiting sleeve is sleeved outside the rope. The opening stroke of the self-locking mechanism is the stroke that the rope can be pulled in 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 end of the vertical pin is axially provided with a socket matched with the hook, the upper side in the height direction is provided with a handle perpendicular to the vertical pin, and the lower side in the height direction is provided with a pin hole perpendicular to the axial direction matched with the horizontal pin;

[0011] The vertical pin can slide vertically relative to the shell to drive the socket to engage or separate with the hook to achieve locking or opening of the hook mechanism. The horizontal pin can slide horizontally relative to the shell to engage or separate with the pin hole to limit or allow the movement of the vertical pin.

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

[0013] Furthermore, a handle hole is provided at a position of the vertical pin corresponding to the installation position of the handle, and the handle is installed on the vertical pin by inserting into the handle hole, and the handle hole is parallel to the pin hole.

[0014] Furthermore, the shell is provided with a slide groove at a position corresponding to the handle, and the handle can be moved along the slide groove to drive the vertical pin to slide relative to the shell.

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

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

[0017] Furthermore, one end of a rope of a pull cable mechanism 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 another pulling 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 connecting piece, and the rope is connected to the horizontal pin or the vertical pin through the connecting piece.

[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 pulling mechanism also includes a fastener, and the rope is formed into a ring shape through the fixing action of the fastener and is connected to the connecting piece.

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

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The double-hook single-open linkage device provided by the present invention comprises two hook mechanisms and a linkage traction mechanism, wherein the linkage traction mechanism is connected to the two hook mechanisms; the hook mechanism comprises a shell, 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 hook states of the two hook mechanisms are opposite. When one of the hook mechanisms 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, and the two hook mechanisms are interlocked through the cooperation of the self-locking mechanism and the linkage traction mechanism. By switching states between the two hook mechanisms, on the one hand, the risk of failure, wear or damage of the single-lock hook device is solved, and on the other hand, the possibility of personnel forgetting to perform the hook anti-falling operation due to negligence is reduced, thereby comprehensively reducing the risk of personnel falling;

[0025] The double-hook single-open linkage device provided by the present invention, wherein the linkage traction mechanism includes two cable mechanisms, the cable mechanisms are rigid multi-degree-of-freedom mechanisms, the two cable mechanisms are respectively connected to two hook mechanisms, the cable mechanisms include ropes and limiting sleeves, the two ends of the rope are connected to two self-locking mechanisms, the two ends of the limiting sleeve are connected to two shells, the limiting sleeve is sleeved outside the rope, the opening stroke of the self-locking mechanism is the stroke that the rope can be pulled in the limiting sleeve, the self-locking mechanism includes a vertical pin, a horizontal pin, a first reset device and a second reset device, when working, the two cable mechanisms work simultaneously, so that the two hook mechanisms switch states simultaneously, and the interactive method is adopted to reduce the problem of wear and damage caused by frequent use of the controller alone affecting its working efficiency and safety, thereby enhancing the durability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 2 A schematic diagram of the working state of the double-hook single-open linkage device provided in an embodiment of the present invention;

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

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

[0030] Figure 5 A schematic diagram of the structure of a self-locking mechanism provided by an embodiment of the present invention;

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

[0032] In the figure: 1. hook mechanism; 2. linkage traction mechanism; 3. hook; 4. self-locking mechanism; 5. shell; 6. cable mechanism; 7. vertical pin; 8. horizontal pin; 9. first return spring; 10. second return spring; 11. handle; 12. socket; 13. handle hole; 14. pin hole; 15. connecting hole; 16. rope; 17. fastener; 18. connecting piece; 19. limiting sleeve; 20. safety rope; 21. connecting ring. DETAILED DESCRIPTION

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

[0034] Example 1

[0035] This embodiment provides a double-hook single-open linkage device, such as Figure 1 As shown, it includes two hook mechanisms 1 and a linkage traction mechanism 2, and the linkage traction mechanism 2 is connected to the two hook 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. The hook 3 is fixedly connected to one side of the housing 5. Figure 3 As shown, the self-locking mechanism 4 can realize the locking and unlocking of the hook 3 through the traction mechanism brought by the linkage traction mechanism 2, and the shell 5 provides support for the hook 3 and the self-locking mechanism 4. The shell 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, and the cable mechanism 6 is a rigid multi-degree-of-freedom mechanism. The two cable mechanisms 6 are respectively connected to the two hook mechanisms 1. Figure 6 As shown, the cable mechanism 6 includes a rope 16 and a limiting sleeve 19, both ends of the rope 16 are connected to two self-locking mechanisms 4, and both ends of the limiting sleeve 19 are connected to two shells 5. The limiting sleeve 19 is sleeved outside the rope 16, and the limiting sleeve 19 can be bent but has no ductility, constraining the movement space of the rope 16 and ensuring the axial movement of the rope 16, so that the traction force is transmitted between the two hook mechanisms 1 through the linkage traction mechanism 2, and the opening stroke of the self-locking mechanism 4 is the stroke that the rope 16 can be pulled in the limiting sleeve 19. The rope 16 used to provide the traction mechanism can be other parts that can play the same role, and can be a steel 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 axial direction of the vertical pin 7 is provided with a socket 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 and is on the same vertical line as the axis of the socket 12. When the vertical pin 7 moves upward, the hook 3 can be locked with the socket 12;

[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, and a handle hole 13 is also provided on the vertical pin 7 corresponding to the position where the handle 11 is installed, and the handle 11 is installed on the vertical pin 7 by inserting into the handle hole 13;

[0040] A pin hole 14 perpendicular to the axial direction and cooperating with the horizontal pin 8 is provided on the lower side of the vertical pin 7 in the height direction, 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 the present embodiment, the first reset device adopts the first reset spring 9, and the second reset device adopts the second reset spring 10, but other mechanisms that can achieve the desired effect can also be used. The vertical pin 7 is divided into two thick and thin sections. The first reset spring 9 is sleeved on the thin section of the vertical pin 7, one end of which is against the thick section of the vertical pin 7, and the other end is against the shell 5; the second reset spring 10 is similarly sleeved on the transverse pin 8, and one end is against the transverse pin 8, and the other end is against the shell 5; when the first reset spring 9 of a hook mechanism 1 of the double-hook single-open linkage device is in a compressed state, its hook 3 cooperates with the jack 12 to lock, otherwise the hook 3 is unlocked in a relaxed state; the second reset spring 10 does not cooperate with the vertical pin 7 and the transverse pin 8 in the compressed state, otherwise the transverse pin 8 limits the longitudinal movement of the vertical pin 7; one of the first reset spring 9 and the second reset spring 10 must be in a compressed state and the other in a relaxed state;

[0042] The vertical pin 7 can slide vertically relative to the shell 5, driving the socket 12 to engage or separate with the hook, thereby locking or opening the hook mechanism 1. The transverse pin 8 can slide horizontally relative to the shell 5, engaging or separating with the pin hole 14, and is used to limit or allow the movement of the vertical pin 7. When the transverse pin 8 is not inserted into the pin hole 14, the vertical pin 7 can move. When the transverse pin 8 is inserted into the pin hole 14, the vertical pin 7 is locked and cannot move.

[0043] The housing 5 is provided with a slide groove at a position corresponding to the handle 11, which is used to move the handle 11 in a preset direction and line. By moving the handle 11 along the slide groove, the vertical pin 7 can be driven to slide relative to the housing. The handle 11 can move toward the direction close to the hook 3 under the action of an external force. When the first reset 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 where the slide groove is not provided. Figure 4 shown.

[0044] One end of the rope 16 of one of the cable mechanisms 6 of 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 another cable mechanism 6 of 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 the double-hook single-open linkage device provided in this embodiment is used:

[0046] Initially, one of the two hook mechanisms of the double-hook single-open linkage device is in a locked state, marked as hook mechanism A, and the other is in an unlocked state, marked as hook mechanism B. Correspondingly, the components of the hook mechanism A are marked as hook A, self-locking mechanism A, vertical pin A, horizontal pin A, first return spring A, second return spring A, handle A, jack A, handle hole A, pin hole A, etc. The components of the hook mechanism B are marked similarly. The above A and B marks are only used to distinguish the hook mechanisms in different states and have no other special meanings;

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

[0048] When in use, first hang the hook mechanism B on a fixed object such as an iron tower, then pull the handle B to move in the direction of the hook B, at this time the first return spring B is compressed, the vertical pin B in the self-locking mechanism B produces an upward axial movement, the plug hole B at its upper end engages with the free end of the hook B, as the vertical pin B moves upward, when the height of the horizontal pin B and the pin hole B are consistent, at this time the second return spring B is converted from a compressed state to a relaxed state, driving the horizontal pin B and the pin hole B to cooperate with each other, limiting the rebound of the first return spring B, and realizing the locking state of the hook B; Figure 2 As shown, at the same time, the upward axial movement of the vertical pin B will apply a traction force F1 to the transverse pin A in the hook mechanism A through the linkage traction mechanism 2, and the transverse pin A in the self-locking mechanism A moves laterally in the direction away from the vertical pin A, and the second return spring A is converted from a relaxed state to a compressed state, and the transverse pin A is separated from the socket A, and the first return spring A rebounds, and the vertical pin A drives the handle A to move axially in the direction away from the hook A, and the socket A is separated from the free end of the hook A, thereby realizing the unlocked state of the hook A, and when the transverse pin B cooperates with the vertical pin B, a traction force F2 will be generated, which is generated at the same time as the rebound force generated when the first return spring A rebounds, and the hook mechanism A and the hook mechanism B switch their states at the same time. After the switching, the hook mechanism A is in an unlocked state, and the hook mechanism B is in a locked state.

[0049] The two limiting sleeves 19 of the two cable pulling mechanisms 6 in the linkage traction mechanism 2 can make the two ropes 16 move in the axial direction to ensure the normal transmission of the traction force in the linkage traction mechanism 2. During use, the two hook mechanisms are alternately locked and unlocked 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-open linkage device. Different from the embodiment 1, in this embodiment, further, the cable mechanism 6 also includes a connecting member 18, and the rope 16 is connected to the horizontal pin 8 or the vertical pin 7 through the connecting member 18. In this embodiment, the connecting member is a rigid member with two holes, and the bottom end of the vertical pin 7 and the free end of the horizontal pin 8 are also provided with a connecting hole 15 for cooperating with the connecting member 18 to connect the rope 16. The cable mechanism 6 also includes a fastener 17, and the rope 16 is formed into a ring shape by the fixing effect of the fastener 17 and connected to the connecting member 18. The fastener 17 and the connecting member 18 can be any other parts that can play the same role, and they will not be repeated here.

[0052] Example 3

[0053] This embodiment provides a double-hook single-open linkage device. Different from the embodiment 2, in this embodiment, the double-hook single-open linkage device further includes a suspension rope 20 and a connecting ring 21. Figure 2 As shown, one end of the sling 20 is connected to the lower end of the hook mechanism 1, and the other end is connected to the wearable device on the operator through a connecting ring 21.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0056] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the protection of the present invention.

Claims

1. A double hook single opening linkage device, characterized in that: It comprises two hook mechanisms (1) and a linkage traction mechanism (2), wherein the linkage traction mechanism (2) is connected to the two hook mechanisms (1); The hook mechanism (1) comprises a housing (5), a hook (3) and a self-locking mechanism (4); the self-locking mechanism (4) is installed inside the housing (5); the hook (3) is fixedly connected to one side of the housing (5); the self-locking mechanism (4) is used to control the opening and closing of the hook (3); the states of the hooks (3) of the two hook mechanisms (1) are opposite; when one of the hook mechanisms (1) switches its state, 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) switches its state; The linkage traction mechanism (2) comprises two cable mechanisms (6), the cable mechanisms (6) being rigid multi-degree-of-freedom mechanisms, the two cable mechanisms (6) being respectively connected to two hook mechanisms (1), the cable mechanisms (6) comprising a rope (16) and a limiting sleeve (19), the two ends of the rope (16) being connected to two self-locking mechanisms (4), the two ends of the limiting sleeve (19) being connected to two housings (5), the limiting sleeve (19) being sleeved outside the rope (16), and the opening stroke of the self-locking mechanism (4) being the stroke that the rope (16) can be pulled in the limiting sleeve (19).

2. The double-hook single-open linkage device according to claim 1, characterized in that: 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 socket (12) in the axial direction for cooperating with the hook (3); the upper side in the height direction is provided with a handle (11) perpendicular to the vertical pin (7); the lower side in the height direction is provided with a pin hole (14) perpendicular to the axial direction for cooperating with the horizontal pin (8); The vertical pin (7) can slide vertically relative to the housing (5) to drive the insertion hole (12) to engage with or disengage from the hook, thereby locking or unlocking the hook mechanism (1); the horizontal pin (8) can slide horizontally relative to the housing (5) to engage with or disengage from the pin hole (14), thereby limiting or allowing the movement of the vertical pin (7). The first resetting device is mounted on the vertical pin (7) and is used to return the vertical pin (7) to an initial position. The second resetting device is mounted on the horizontal pin (8) and is used to return the horizontal pin (8) to an initial position. Only one of the first resetting device and the second resetting device is in operation at the same time.

3. The double-hook single-open linkage device according to claim 2, characterized in that: The vertical pin (7) is also provided with a handle hole (13) at a position corresponding to the installation position of the handle (11); the handle (11) is installed on the vertical pin (7) by inserting into the handle hole (13); the handle hole (13) is parallel to the pin hole (14).

4. The double-hook single-open linkage device according to claim 3, characterized in that: The housing (5) is provided with a sliding groove at a position corresponding to the handle (11); by moving the handle (11) along the sliding groove, the vertical pin (7) can be driven to slide relative to the housing.

5. The double-hook single-open linkage device according to claim 2, characterized in that: 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 housing (5); And / or, the second reset device is a second reset spring (10), one end of the second reset spring (10) abuts against the transverse pin (8), and the other end abuts against the housing (5).

6. The double-hook single-open linkage device according to claim 2, characterized in that: One end of a rope (16) of a cable mechanism (6) of the linkage traction mechanism (2) is connected to the bottom end of a vertical pin (7) of a self-locking mechanism (4) of a first hook mechanism (1), and the other end is connected to a free end of a horizontal pin (8) of a self-locking mechanism (4) of a second hook mechanism (1); One end of the rope (16) of another 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).

7. The double-hook single-open linkage device according to claim 2, characterized in that: The cable mechanism (6) further comprises a connecting member (18), and the rope (16) is connected to the transverse pin (8) or the vertical pin (7) via the connecting member (18).

8. The double-hook single-open linkage device according to claim 7, characterized in that: The bottom end of the vertical pin (7) and the free end of the horizontal pin (8) are also provided with connection holes (15) for cooperating with the connection piece (18) to connect the rope (16).

9. The double-hook single-open linkage device according to claim 7, characterized in that: The cable pulling mechanism (6) further comprises a fastener (17), and the rope (16) is formed into a ring shape by the fixing action of the fastener (17) and is connected to the connecting member (18).

10. The double-hook single-open linkage device according to claim 1, characterized in that: It also comprises a hanging rope (20) and a connecting ring (21), wherein one end of the hanging 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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